CN111188763A - A high and low pressure lubrication system for high power plunger pump - Google Patents

Abstract

The invention discloses a high-low pressure lubricating system for a high-power plunger pump, which comprises a high-pressure oil path and a low-pressure oil path, wherein the high-pressure oil path is used for lubricating a connecting rod bearing bush and a crosshead bearing bush in the plunger pump, and the low-pressure oil path is used for lubricating a crankshaft bearing, a crosshead slide rail, a reduction gearbox bearing and a reduction gearbox gear pair in the plunger pump. Has the advantages that: the oil inlet is divided into a high-pressure oil path and a low-pressure oil path, the high-pressure oil path is used for lubricating a connecting rod bearing bush and a crosshead bearing bush, and the low-pressure oil path is used for lubricating a crankshaft bearing, a crosshead slide rail, a reduction gearbox bearing and a reduction gearbox gear pair; the two oil pumps supply oil, so that the oil supply amount of each oil way can be better ensured, the lubricating oil can be better distributed, the problems of uneven distribution of the lubricating oil and insufficient lubricating oil amount of each lubricating point due to excessive lubricating branches are avoided, the utilization rate of the lubricating oil is improved, and the abnormity is reduced; the high-pressure oil circuit and the low-pressure oil circuit both use two-stage filtration, so that impurities in lubricating oil can be reduced, and the service life of each part of the plunger pump is prolonged.

Description

High-low pressure lubricating system for high-power plunger pump

Technical Field

The invention relates to the technical field of lubrication of plunger pumps, in particular to a high-pressure and low-pressure lubrication system for a high-power plunger pump.

Background

Along with the further development of unconventional oil gas and shale oil gas, the operation working condition of fracturing operation is more and more complicated, and the requirement on fracturing equipment, particularly a plunger pump, is higher and higher. Particularly, unconventional oil and gas operation, namely shale gas fracturing operation, requires high-power, high-pressure and long-time continuous operation of the plunger pump, which provides challenges for the service life of each moving mechanism of the plunger pump. The lubricating system is one of the important components of the plunger pump, not only can lubricate the surfaces of all moving parts and reduce friction resistance and abrasion, but also can cool the parts and take away heat generated by friction, and can clean the friction surfaces and take away impurities. The good lubricating effect can greatly prolong the service life of the plunger pump. The lubricating mode of traditional plunger pump is oil feed all the way usually, distribute through the lubricating oil that gets into the main oil circuit and lubricate each part spare part of plunger pump, including the axle bush, the bearing, gears and so on, the problem that this kind of lubricating mode exists is, lubricating oil circuit branch is many, lubricating oil distribution is difficult to control, the lubricating oil volume that is difficult to guarantee key parts needs satisfies the demand on the one hand, do not cause the waste of lubricating oil allotment to the part that does not need excessive lubrication simultaneously, especially to high-power plunger pump, the lubricating oil volume that its needs is many, the lubrication requirement of main bearing position is high, the uneven whole lubricated effect that can greatly reduced of lubricating oil distribution.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a high-low pressure lubricating system for a high-power plunger pump, wherein a traditional lubricating 'one-way oil inlet' mode is changed, two ways of oil inlets are respectively formed in a high-pressure oil way and a low-pressure oil way, the high-pressure oil way is mainly used for lubricating a connecting rod bearing bush and a crosshead bearing bush which have higher lubricating requirements, and the low-pressure oil way is mainly used for lubricating a crankshaft bearing, a crosshead slide rail, a reduction gearbox bearing and a reduction gearbox gear pair which have lower lubricating requirements in comparison; the two oil pumps supply oil, so that the oil supply amount of each oil way can be better ensured, the lubricating oil can be better distributed, the problems of uneven distribution of the lubricating oil and insufficient lubricating oil amount of each lubricating point due to excessive lubricating branches are avoided, the utilization rate of the lubricating oil is improved, and the abnormity is reduced; the high-pressure oil circuit and the low-pressure oil circuit both use two-stage filtration, so that impurities in lubricating oil can be reduced, and the service life of each part of the plunger pump is prolonged. The overflow valve, the pressure sensor and the temperature sensor are used for protecting the whole lubricating system.

The aim of the invention is achieved by the following technical measures: the high-low pressure lubricating system for the high-power plunger pump comprises a high-pressure oil way and a low-pressure oil way, wherein the high-pressure oil way is used for lubricating a connecting rod bearing bush and a crosshead bearing bush in the plunger pump, and the low-pressure oil way is used for lubricating a crankshaft bearing, a crosshead slide rail, a reduction gearbox bearing and a reduction gearbox gear pair in the plunger pump.

Further, the lubricating oil quantity of the high-pressure and low-pressure lubricating system is 150-200L/min.

Further, the rated lubricating oil pressure of the high-pressure oil way is 200-350 PSI.

Furthermore, the rated lubricating oil pressure of the high-pressure oil way is 60-150 PSI.

Furthermore, the oil inlet of the low-pressure oil way is respectively provided with independent lubricating oil ways for a reduction gearbox bearing and a reduction gearbox gear pair.

Further, a high-low pressure lubricating system for high-power plunger pump includes the oil tank, and the high pressure advances oil pipe, and the low pressure advances oil pipe, and the high pressure returns oil pipe, the low pressure returns oil pipe, the oil-out of oil tank advances oil pipe through the high pressure and is connected with the high-pressure oil circuit oil inlet of plunger pump, the oil-out of oil tank advances oil pipe through the low pressure and is connected with the low pressure oil circuit oil inlet of plunger pump, the high pressure oil circuit oil-out of plunger pump returns oil pipe through the high pressure and inserts the oil tank, the low pressure oil circuit oil-out of plunger pump returns oil pipe through the low pressure and inserts the oil tank, and the high pressure advances oil.

Furthermore, a high-pressure oil suction filter, a high-pressure oil pump, a high-pressure overflow valve, a high-pressure cooler, a high-pressure sensor and a high-pressure temperature sensor are sequentially arranged on the high-pressure oil inlet pipe along the flow direction of the oil path.

Further, the filtering precision of the high-pressure oil absorption filter is 40-50 microns.

And a high-pressure oil inlet filter is arranged between the high-pressure overflow valve and the high-pressure cooler.

Further, the filtering precision of the high-pressure oil inlet filter is 10-25 microns.

Furthermore, a parameter value is set in the high-pressure overflow valve, and when the oil pressure is higher than the parameter value, the high-pressure overflow valve is opened, and the lubricating oil returns to the oil tank.

Further, the parameter value set by the high-pressure overflow valve is 400 PSI.

Further, a temperature parameter is set on the high-pressure cooler, and when the oil temperature is higher than the set temperature parameter, the high-pressure cooler is turned on to dissipate heat.

Further, the temperature parameter set by the high-pressure cooler is 40-45 ℃.

Furthermore, a low-pressure oil suction filter, a low-pressure oil pump, a low-pressure overflow valve, a low-pressure cooler, a low-pressure sensor and a low-pressure temperature sensor are sequentially arranged on the low-pressure oil inlet pipe along the flow direction of the oil path.

Further, the filtering precision of the low-pressure oil absorption filter is 40-50 microns.

And a low-pressure oil inlet filter is arranged between the low-pressure overflow valve and the low-pressure cooler.

Further, the filtering precision of the low-pressure oil inlet filter is 10-25 microns.

Furthermore, a low-pressure parameter value is set in the low-pressure overflow valve, and when the oil pressure is higher than the set low-pressure parameter value, the low-pressure overflow valve is opened, and the lubricating oil returns to the oil tank.

Further, the low-pressure parameter value set by the low-pressure overflow valve is 200 PSI.

Further, a low-pressure temperature parameter is set on the low-pressure cooler, and when the oil temperature is higher than the set low-pressure temperature parameter, the low-pressure cooler is opened to dissipate heat.

Further, the temperature parameter set by the low-pressure cooler is 40-45 ℃.

Further, an oil tank temperature sensor is arranged on the oil tank.

Compared with the prior art, the invention has the beneficial effects that: the high-low pressure lubricating system for the high-power plunger pump is provided, the traditional lubricating 'one-way oil inlet' mode is changed, two ways of oil inlets of a high-pressure oil way and a low-pressure oil way are divided, the high-pressure oil way is mainly used for lubricating a connecting rod bearing bush and a crosshead bearing bush which have higher lubricating requirements, and the low-pressure oil way is mainly used for lubricating a crankshaft bearing, a crosshead slide rail, a reduction gearbox bearing and a reduction gearbox gear pair which have lower lubricating requirements in comparison; the two oil pumps supply oil, so that the oil supply amount of each oil way can be better ensured, the lubricating oil can be better distributed, the problems of uneven distribution of the lubricating oil and insufficient lubricating oil amount of each lubricating point due to excessive lubricating branches are avoided, the utilization rate of the lubricating oil is improved, and the abnormity is reduced; the high-pressure oil circuit and the low-pressure oil circuit both use two-stage filtration, so that impurities in lubricating oil can be reduced, and the service life of each part of the plunger pump is prolonged. The overflow valve, the pressure sensor and the temperature sensor are used for protecting the whole lubricating system.

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

Drawings

Fig. 1 is a schematic diagram of the high-pressure oil passage and the low-pressure oil passage in the plunger pump of the present invention.

Fig. 2 is a schematic diagram of the external oil supply system of the plunger pump of the present invention.

The oil pump comprises a connecting rod bearing bush 1, acrosshead bearing bush 2, a crankshaft bearing 3, a crossheadupper slide rail 4, a crossheadlower slide rail 5, a reductiongearbox gear pair 6, a reduction gearbox bearing 7, a high-pressure oil way 8, a low-pressure oil way 9, anoil tank 10, a high-pressureoil absorption filter 11, a high-pressure oil pump 12, a high-pressure overflow valve 13, a high-pressureoil inlet filter 14, a high-pressure cooler 15, a low-pressureoil absorption filter 16, a low-pressure oil pump 17, a low-pressure overflow valve 18, a low-pressureoil inlet filter 19, a low-pressure cooler 20, a high-pressure sensor 21, a.

Detailed Description

As shown in fig. 1 to 2, a high-low pressure lubrication system for a high-power plunger pump comprises a high-pressure oil path 8 and a low-pressure oil path 9, wherein the high-pressure oil path 8 is used for lubricating a connecting rod bearing bush 1 and acrosshead bearing bush 2 in the plunger pump, and the low-pressure oil path 9 is used for lubricating a crankshaft bearing 3, a crosshead slide rail, a reduction gearbox bearing 7 and a reductiongearbox gear pair 6 in the plunger pump. The crosshead shoe includes a crossheadupper shoe 4 and a crossheadlower shoe 5. The method changes the traditional lubricating 'one-way oil inlet' mode, and is divided into two ways of oil inlet of a high-pressure oil way 8 and a low-pressure oil way 9, wherein the high-pressure oil way 8 is mainly used for lubricating a connecting rod bearing bush 1 and acrosshead bearing bush 2 which have higher lubricating requirements, and the low-pressure oil way 9 is mainly used for lubricating a crankshaft bearing 3, a crosshead slide rail, a reduction gearbox bearing 7 and a reductiongearbox gear pair 6 which have slightly lower lubricating requirements in comparison; the oil supply of each oil way can be better ensured through the two oil pumps, the lubricating oil can be better distributed, the problems that the lubricating oil is unevenly distributed and the lubricating oil quantity of each lubricating point is insufficient due to too many lubricating branches are avoided, the utilization rate of the lubricating oil is improved, and the abnormity is reduced. The fit clearance of the connecting rod bearing bush 1 and thecrosshead bearing bush 2 is small, the bearing load is large, the contact area is large, the requirement on lubrication is high, the lubrication oil ways of the two bearing bushes are independently opened together with other oil ways, the high-pressure oil pump 12 is adopted to supply oil independently, sufficient lubricating oil can better establish an oil film, the abrasion of the two bearing bushes under high load is effectively reduced, heat and impurities generated by friction are rapidly taken away, and the service life of the two bearing bushes is prolonged.

The lubricating oil quantity of the high-pressure and low-pressure lubricating system is 150-200L/min.

The rated lubricating oil pressure of the high-pressure oil way is 200-350 PSI.

The rated lubricating oil pressure of the high-pressure oil way is 60-150 PSI.

And independent lubricating oil paths are respectively arranged at the oil inlet of the low-pressure oil path 9 for the reduction gearbox bearing 7 and the reductiongearbox gear pair 6. The reduction box bearing 7 and the reductionbox gear pair 6 are high in rotating speed, oil is supplied independently, sufficient lubricating oil can be guaranteed, an oil film is effectively established, heat generated by friction is taken away rapidly, and the service life is prolonged.

A high-low pressure lubricating system for high-power plunger pump includes oil feeding system, oil feeding system includesoil tank 10, and the high pressure advances oil pipe, and the low pressure advances oil pipe, and the high pressure returns oil pipe, and the low pressure returns oil pipe, the oil-out ofoil tank 10 advances oil pipe through the high pressure and is connected with plunger pump's 8 oil inlets of high pressure oil circuit, the oil-out ofoil tank 10 advances oil pipe through the low pressure and is connected with plunger pump's 9 oil inlets of low pressure oil circuit, the 8 oil-outs of high pressure oil circuit of plunger pump return oil pipe through the high pressure andinserts oil tank 10, plunger pump's 9 oil circuit oil-outs return oil pipe through the low pressureinsert oil tank 10, and the high pressure advances oil. The independent high-pressure oil inlet-oil return and low-pressure oil inlet-oil return effectively meet different lubricating requirements of various lubricating points in the plunger pump, the lubricating requirements are high, high-pressure independent oil supply is realized, and the distribution of the oil inlets meets respective requirements.

And a high-pressureoil suction filter 11, a high-pressure oil pump 12, a high-pressure overflow valve 13, a high-pressureoil inlet filter 14 and a high-pressure cooler 15 are sequentially arranged on the high-pressure oil inlet pipe along the flow direction of the oil path.

The filtering precision of the high-pressureoil absorption filter 11 is 40-50 microns, and the filtering precision of the high-pressureoil inlet filter 14 is 10-25 microns. The high-pressure oil inlet pipe adopts double filtration, so that the filtering precision is higher, impurities in lubricating oil can be reduced, and the service life of each part of the plunger pump is prolonged.

And setting a parameter value on the high-pressure overflow valve 13, when the oil pressure of the lubricating oil is higher than the parameter value, opening the high-pressure overflow valve 13, returning the lubricating oil to theoil tank 10, and closing the high-pressure overflow valve 13 when the oil pressure of the lubricating oil is normal. The parameter value set by the high-pressure overflow valve is 400 PSI.

A temperature parameter is set on the high-pressure cooler 15, and when the oil temperature is higher than the set temperature parameter, the high-pressure cooler 15 is turned on to dissipate heat. And the lubricating oil is cooled by heat dissipation, so that the lubricating oil entering the high-pressure oil way 8 is ensured to be within a normal use temperature range.

The temperature parameter set by the high-pressure cooler is 40-45 ℃.

And a low-pressureoil suction filter 16, a low-pressure oil pump 17, a low-pressure overflow valve 18, a low-pressureoil inlet filter 19 and a low-pressure cooler 20 are sequentially arranged on the low-pressure oil inlet pipe along the flow direction of the oil path.

The filtering precision of the low-pressureoil suction filter 16 is 40-50 microns, and the filtering precision of the low-pressureoil inlet filter 19 is 10-25 microns. The low pressure advances oil pipe and adopts dual filtration, and filter fineness is higher, can reduce the impurity in the lubricating oil, improves the life of each part of plunger pump.

And a low-pressure parameter value is set in the low-pressure overflow valve 18, when the oil pressure is higher than the set low-pressure parameter value, the low-pressure overflow valve 18 is opened, the lubricating oil returns to theoil tank 10, and when the oil pressure of the lubricating oil is normal, the low-pressure overflow valve 18 is closed. And the low-pressure parameter value set by the low-pressure overflow valve is 200 PSI.

A low-pressure temperature parameter is set on the low-pressure cooler 20, and when the oil temperature is higher than the set low-pressure temperature parameter, the low-pressure cooler 20 is turned on to dissipate heat. And the lubricating oil is cooled by heat dissipation, so that the lubricating oil entering the low-pressure oil way 9 is ensured to be within a normal use temperature range.

The temperature parameter set by the low-pressure cooler is 40-45 ℃.

And a high-pressure sensor 21 and a high-pressure temperature sensor 22 are arranged at the tail end of the high-pressure oil inlet pipe along the flow direction of the oil way. The high-pressure sensor 21 and the high-pressure temperature sensor 22 are used to detect the pressure and temperature of the lubricating oil entering the high-pressure oil passage 8.

And a low-pressure sensor and a low-pressure temperature sensor are arranged at the tail end of the low-pressure oil inlet pipe along the flow direction of the oil way. The low-pressure sensor and the low-pressure temperature sensor are used for detecting the pressure and temperature of the lubricating oil entering the low-pressure oil passage 9. Atank temperature sensor 23 is provided on thetank 10. The temperature monitoring of the whole high-low pressure lubricating system is realized through a fueltank temperature sensor 23, a high-pressure temperature sensor 22 and a low-pressure temperature sensor. The high-pressure sensor 21, the high-pressure temperature sensor 22, the low-pressure sensor, the low-pressure temperature sensor and the oiltank temperature sensor 23 are arranged in the use range, the oil supply amount is automatically adjusted by monitoring the temperature and the pressure change of lubricating oil during operation, and the oil supply amount is ensured to be sufficient.

It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (23)

Translated fromChinese

1.一种用于大功率柱塞泵的高低压润滑系统，其特征在于：包括高压油路和低压油路，所述高压油路为柱塞泵中的连杆轴瓦和十字头轴瓦润滑，所述低压油路为柱塞泵中的曲轴轴承、十字头滑轨、减速箱轴承、减速箱齿轮副润滑。1. a high-low pressure lubricating system for high-power plunger pump, is characterized in that: comprise high-pressure oil circuit and low-pressure oil circuit, and described high-pressure oil circuit is the connecting rod bearing bush and the crosshead bearing bush lubrication in the plunger pump, The low-pressure oil circuit lubricates the crankshaft bearing, the cross-head slide rail, the bearing of the reduction box, and the gear pair of the reduction box in the plunger pump.2.根据权利要求1所述的用于大功率柱塞泵的高低压润滑系统，其特征在于：所述高低压润滑系统润滑油量为150-200L/min。2 . The high and low pressure lubrication system for a high-power plunger pump according to claim 1 , wherein the amount of lubricating oil in the high and low pressure lubrication system is 150-200 L/min. 3 .3.根据权利要求1所述的用于大功率柱塞泵的高低压润滑系统，其特征在于：所述高压油路额定润滑油压为200-350PSI。3. The high and low pressure lubrication system for a high-power plunger pump according to claim 1, wherein the rated lubricating oil pressure of the high-pressure oil circuit is 200-350 PSI.4.根据权利要求1所述的用于大功率柱塞泵的高低压润滑系统，其特征在于：所述高压油路额定润滑油压为60-150PSI。4. The high and low pressure lubrication system for a high-power plunger pump according to claim 1, wherein the rated lubricating oil pressure of the high-pressure oil circuit is 60-150 PSI.5.根据权利要求1所述的用于大功率柱塞泵的高低压润滑系统，其特征在于：在所述低压油路的进油口，分别为减速箱轴承和减速箱齿轮副设有各自独立的润滑油路。5. The high and low pressure lubrication system for a high-power plunger pump according to claim 1, characterized in that: at the oil inlet of the low-pressure oil circuit, there are respectively provided for the gearbox bearing and the gearbox gear pair. Independent lubricating oil circuit.6.根据权利要求1所述的用于大功率柱塞泵的高低压润滑系统，其特征在于：所述用于大功率柱塞泵的高低压润滑系统包括油箱，高压进油管，低压进油管，高压回油管，低压回油管，所述油箱的出油口通过高压进油管与柱塞泵的高压油路进油口连接，所述油箱的出油口通过低压进油管与柱塞泵的低压油路进油口连接，所述柱塞泵的高压油路出油口通过高压回油管接入油箱，所述柱塞泵的低压油路出油口通过低压回油管接入油箱，高压进油管与低压进油管并联，高压回油管与低压回油管并联。6. The high-low pressure lubrication system for high-power plunger pump according to claim 1, wherein the high-low pressure lubrication system for high-power plunger pump comprises an oil tank, a high-pressure oil inlet pipe, and a low-pressure oil inlet pipe , high pressure oil return pipe, low pressure oil return pipe, the oil outlet of the oil tank is connected with the oil inlet of the high pressure oil circuit of the plunger pump through the high pressure oil inlet pipe, the oil outlet of the oil tank is connected with the low pressure of the plunger pump through the low pressure oil inlet pipe The oil inlet of the plunger pump is connected to the oil tank, the high pressure oil outlet of the plunger pump is connected to the oil tank through the high pressure oil return pipe, the low pressure oil outlet of the plunger pump is connected to the oil tank through the low pressure oil return pipe, and the high pressure oil inlet pipe It is connected in parallel with the low pressure oil inlet pipe, and the high pressure oil return pipe is connected in parallel with the low pressure oil return pipe.7.根据权利要求6所述的用于大功率柱塞泵的高低压润滑系统，其特征在于：所述高压进油管上沿油路流向依次设有高压吸油过滤器，高压油泵，高压溢流阀，高压冷却器，高压压力传感器和高压温度传感器。7. The high-low pressure lubricating system for a high-power plunger pump according to claim 6, wherein the high-pressure oil inlet pipe is sequentially provided with a high-pressure oil suction filter, a high-pressure oil pump, and a high-pressure overflow along the flow direction of the oil path. Valves, high pressure coolers, high pressure pressure sensors and high pressure temperature sensors.8.根据权利要求7所述的用于大功率柱塞泵的高低压润滑系统，其特征在于：所述高压吸油过滤器的过滤精度为40-50微米。8 . The high-low pressure lubrication system for a high-power plunger pump according to claim 7 , wherein the filtering precision of the high-pressure oil suction filter is 40-50 microns. 9 .9.根据权利要求7所述的用于大功率柱塞泵的高低压润滑系统，其特征在于：在所述高压溢流阀与高压冷却器之间设有高压进油过滤器。9 . The high-low pressure lubrication system for a high-power plunger pump according to claim 7 , wherein a high-pressure oil inlet filter is provided between the high-pressure relief valve and the high-pressure cooler. 10 .10.根据权利要求9所述的用于大功率柱塞泵的高低压润滑系统，其特征在于：所述高压进油过滤器的过滤精度为10-25微米。10 . The high-low pressure lubrication system for a high-power plunger pump according to claim 9 , wherein the filtering precision of the high-pressure oil inlet filter is 10-25 microns. 11 .11.根据权利要求7所述的用于大功率柱塞泵的高低压润滑系统，其特征在于：在所述高压溢流阀设置一个参数值，当油压高于参数值时，高压溢流阀打开，润滑油回到油箱。11. The high and low pressure lubrication system for a high-power plunger pump according to claim 7, wherein a parameter value is set in the high pressure relief valve, and when the oil pressure is higher than the parameter value, the high pressure relief valve The valve opens and the lubricating oil returns to the tank.12.根据权利要求11所述的用于大功率柱塞泵的高低压润滑系统，其特征在于：所述高压溢流阀设置的参数值为400PSI。12 . The high-low pressure lubrication system for a high-power plunger pump according to claim 11 , wherein the parameter value set by the high-pressure relief valve is 400 PSI. 13 .13.根据权利要求7所述的用于大功率柱塞泵的高低压润滑系统，其特征在于：在所述高压冷却器上设置一个温度参数，当油温高于设定温度参数时，高压冷却器打开散热。13. The high-low pressure lubrication system for high-power plunger pumps according to claim 7, wherein a temperature parameter is set on the high-pressure cooler, and when the oil temperature is higher than the set temperature parameter, the high-pressure The cooler is turned on to dissipate heat.14.根据权利要求13所述的用于大功率柱塞泵的高低压润滑系统，其特征在于：所述高压冷却器设置的温度参数为40-45℃。14 . The high-low pressure lubrication system for a high-power plunger pump according to claim 13 , wherein the temperature parameter set by the high-pressure cooler is 40-45° C. 14 .15.根据权利要求6所述的用于大功率柱塞泵的高低压润滑系统，其特征在于：所述低压进油管上沿油路流向依次设有低压吸油过滤器，低压油泵，低压溢流阀，低压冷却器，低压压力传感器和低压温度传感器。15. The high and low pressure lubrication system for a high-power plunger pump according to claim 6, wherein the low-pressure oil inlet pipe is sequentially provided with a low-pressure oil suction filter, a low-pressure oil pump, and a low-pressure overflow along the flow direction of the oil path. valve, low pressure cooler, low pressure pressure sensor and low pressure temperature sensor.16.根据权利要求15所述的用于大功率柱塞泵的高低压润滑系统，其特征在于：所述低压吸油过滤器的过滤精度为40-50微米。16. The high and low pressure lubrication system for a high-power plunger pump according to claim 15, wherein the filtering precision of the low pressure oil suction filter is 40-50 microns.17.根据权利要求15所述的用于大功率柱塞泵的高低压润滑系统，其特征在于：在所述低压溢流阀和低压冷却器之间设有低压进油过滤器。17. The high and low pressure lubrication system for a high-power plunger pump according to claim 15, wherein a low pressure oil inlet filter is provided between the low pressure relief valve and the low pressure cooler.18.根据权利要求17所述的用于大功率柱塞泵的高低压润滑系统，其特征在于：所述低压进油过滤器的过滤精度为10-25微米。18. The high and low pressure lubrication system for a high-power plunger pump according to claim 17, wherein the filtering precision of the low pressure oil inlet filter is 10-25 microns.19.根据权利要求15所述的用于大功率柱塞泵的高低压润滑系统，其特征在于：在所述低压溢流阀设置一个低压参数值，当油压高于设定的低压参数值时，低压溢流阀打开，润滑油回到油箱。19. The high and low pressure lubrication system for a high-power plunger pump according to claim 15, wherein a low pressure parameter value is set on the low pressure relief valve, and when the oil pressure is higher than the set low pressure parameter value When the low pressure relief valve opens, the lubricating oil returns to the oil tank.20.根据权利要求19所述的用于大功率柱塞泵的高低压润滑系统，其特征在于：所述低压溢流阀设置的低压参数值为200PSI。20 . The high and low pressure lubrication system for a high-power plunger pump according to claim 19 , wherein the low pressure parameter value set by the low pressure relief valve is 200 PSI. 21 .21.根据权利要求15所述的用于大功率柱塞泵的高低压润滑系统，其特征在于：在所述低压冷却器上设置一个低压温度参数，当油温高于设定的低压温度参数时，低压冷却器打开散热。21. The high and low pressure lubrication system for a high-power plunger pump according to claim 15, wherein a low pressure temperature parameter is set on the low pressure cooler, and when the oil temperature is higher than the set low pressure temperature parameter When the low pressure cooler is turned on to dissipate heat.22.根据权利要求21所述的用于大功率柱塞泵的高低压润滑系统，其特征在于：所述低压冷却器设置的温度参数为40-45℃。22 . The high and low pressure lubrication system for a high-power plunger pump according to claim 21 , wherein the temperature parameter set by the low pressure cooler is 40-45° C. 23 .23.根据权利要求6所述的用于大功率柱塞泵的高低压润滑系统，其特征在于：在所述油箱上设有油箱温度传感器。23. The high and low pressure lubrication system for a high-power plunger pump according to claim 6, wherein an oil tank temperature sensor is provided on the oil tank.

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