CN210769170U - Multipoint-supported five-cylinder plunger pump - Google Patents

Abstract

The utility model discloses a five jar plunger pumps that multiple spot supported, including power end assembly, fluid end assembly and reducing gear box assembly, power end assembly includes the crankcase, cross head box and space stop, the crankcase, cross head box and space stop connect gradually, fluid end assembly fixes on the space stop, the reducing gear box assembly is fixed on the crankcase, the bent axle supporter is established to the bottom of crankcase, the bent axle supporter is used for supporting the crankcase, the cross head supporter is established to the bottom of cross head box, the cross head supporter is used for supporting the cross head box, the hydraulic support body is established to the bottom of space stop, the hydraulic support body is used for supporting fluid end assembly. Has the advantages that: through the design of supporting the multiple spot of crankcase body, cross head box and fluid end assembly, can improve the support intensity of plunger pump, reduce the vibration, guarantee the high load operation better, move more steadily.

Description

Multipoint-supported five-cylinder plunger pump

Technical Field

The utility model relates to a plunger pump technical field, concretely relates to five jar plunger pumps that multiple spot supported.

Background

Along with the further development of unconventional oil gas and shale oil gas, the requirement of fracturing operation on pressure and discharge capacity is constantly improved, not only is the operating pressure constantly increased along with the increase of horizontal well depth, but also the discharge capacity that single-section well required is higher and higher, and this makes the fracturing construction scale bigger and bigger, and abominable operating mode also provides higher requirement to fracturing equipment especially to the plunger pump. At present, in the shale oil and gas development process, the working pressure generally reaches 80-90MPa or even higher, and the single-stage working displacement is also generally 1800m³-2000m³Even above, the plunger pump not only needs to be capable of meeting continuous operation of high pressure and large discharge capacity, but also needs to ensure quality stability under continuous high-load operation, and pump stopping time and maintenance time are reduced. The most widely applied fracturing truck in the market at present is a 2500-type fracturing truck which is provided with a 2800hp plunger pump, and other commonly used fracturing pumps comprise a 2500hp pump, a 3300hp pump, a 4000hp pump and the like, for example, the 2800hp pump is taken as an example, because of power limitation, the single pump displacement is lower when high pressure is applied, and the requirement of a single-stage displacement is 14-16m³In addition, the conventional plunger pump is in high-load operation for a long time under the condition of facing increasingly severe operation working conditions, the frequency of problems is increased, and the maintenance and overhaul costs are increased. In recent years, the electric drive fracturing operation is started, the problem of power limitation of a diesel engine is solved by adopting the motor drive, and the electric drive fracturing pump is more suitable for driving a high-power plunger pump.

With the increase of the power of the plunger pump, higher requirements are also put on the operation stability and the supporting strength of the plunger pump.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a not enough of prior art is overcome to the purpose, provides a five jar plunger pumps that multiple spot supported, supports the design through the multiple spot to crankcase, cross head box and fluid end assembly, can improve the support intensity of plunger pump, reduces the vibration, guarantees the high load operation better, moves more steadily. The crankshaft box body and the crosshead box body in the power end assembly of the five-cylinder plunger pump are in an integral welding structure, so that the structural strength of the power end assembly is higher, the supporting stability is better, and the vibration of the whole pump can be reduced. The cylinder spacing of the five-cylinder plunger pump is designed to be 13-14 inches, the bearing area of the connecting rod, the cross head and the bearing bush is increased, the high-power output of the five-cylinder plunger pump is guaranteed, the specific power of the five-cylinder plunger pump can reach 7000hp, the problems that the shale gas fracturing well site is small in area and a large number of required fracturing devices can be effectively solved, the use of the devices can be reduced, and the well site arrangement is facilitated.

The purpose of the utility model is achieved through the following technical measures: the utility model provides a five jar plunger pumps that multiple spot supported, includes power end assembly, fluid end assembly and reducing gear box assembly, power end assembly includes the crankcase, cross head box and space stop, the crankcase, cross head box and space stop connect gradually, fluid end assembly fixes on the space stop, the reducing gear box assembly is fixed on the crankcase, the bent axle supporter is established to the bottom of crankcase, the bent axle supporter is used for supporting the crankcase, the cross head supporter is established to the bottom of cross head box, the cross head supporter is used for supporting the cross head box, the hydraulic support body is established to the bottom of space stop, the hydraulic support body is used for supporting fluid end assembly.

Furthermore, the crankcase body and the crosshead box body are integrally welded to form a power end shell, the power end shell is connected with the spacer, the power end shell comprises vertical plates, bearing seats, a front end plate, a rear cover plate, a bottom plate, a supporting plate and an upper cover plate, the number of the vertical plates is 6, the number of the bearing seats is 6, one vertical plate is correspondingly connected with one bearing seat, the 6 vertical plates are arranged in parallel to form a power end cavity, the bottom plate is arranged at the bottom of the power end cavity, the upper cover plate is arranged at the top of the power end cavity, the front end plate is arranged at the front end of the power end cavity, the rear cover plate is arranged at the rear end of the power end cavity, and the supporting plate is arranged between every two adjacent vertical plates which are arranged in parallel.

Furthermore, a crosshead assembly is arranged in the crosshead box body, a connecting rod assembly is arranged between the crankcase body and the crosshead box body, a crankshaft is arranged in the crankcase body, one end of the connecting rod assembly is connected with the crankshaft through a connecting rod bearing bush, the other end of the connecting rod assembly is connected with the crosshead assembly through a crosshead bearing bush, and the connecting rod bearing bush and the crosshead bearing bush are steel back bearing bushes with alloy coatings.

Further, the cylinder spacing of the five-cylinder plunger pump is 13-14 inches.

Compared with the prior art, the beneficial effects of the utility model are that: through the design of multi-point support to crankcase body, cross head box and hydraulic end assembly, can improve five jar plunger pump's support intensity, reduce the vibration, guarantee high load operation better, the operation is more steady. The crankshaft box body and the crosshead box body in the power end assembly of the five-cylinder plunger pump are in an integral welding structure, so that the structural strength of the power end assembly is higher, the supporting stability is better, and the vibration of the whole pump can be reduced. The cylinder spacing of the five-cylinder plunger pump is designed to be 13-14 inches, the bearing area of the connecting rod, the cross head and the bearing bush is increased, the high-power output of the five-cylinder plunger pump is guaranteed, the specific power of the five-cylinder plunger pump can reach 7000hp, the problems that the shale gas fracturing well site is small in area and a large number of required fracturing devices can be effectively solved, the use of the devices can be reduced, and the well site arrangement is facilitated.

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

Drawings

Fig. 1 is a schematic structural view of the present five-cylinder plunger pump.

FIG. 2 is a schematic diagram of a power end assembly.

FIG. 3 is a schematic diagram of the power end housing construction.

Fig. 4 is a schematic structural view of the reduction gearbox assembly.

Fig. 5 is a cross-sectional view of a planetary stage reduction gearbox.

Fig. 6 is a cross-sectional view of a parallel stage reduction gearbox.

Fig. 7 is a schematic structural view of the crankshaft.

FIG. 8 is a schematic view of the connection of the link assembly to the crosshead assembly.

Wherein, 1, a power end assembly, 2, a reduction gearbox assembly, 3, a hydraulic end assembly, 4, a driving flange, 5, a power end shell, 6, a crankshaft, 7, a bearing, 8, a connecting rod bearing bush, 9, a connecting rod body, 10, a slide rail, 11, a crosshead, 12, a crosshead bearing bush, 13, a pull rod, 14, a spacing frame, 15, a long screw rod, 16, a nut, 17, a hoop, 18, a plunger, 19, a valve box, 20, a crankshaft support body, 21, a crosshead support body, 22, a hydraulic support body, 23, a rear cover plate, 24, a vertical plate, 25, a bearing seat, 26, a bottom plate, 27, a support plate, 28, a front end plate, 29, an upper cover plate, 30, a parallel stage reduction gearbox, 31, a planet stage reduction gearbox, 32, an inner gear ring, 33, a planet wheel, 34, a sun wheel, 35, a planet carrier, 36, a large gear, 37, a small gear, 38, a spline, 41. crosshead gland, 42, guide plate, 43, screw.

Detailed Description

In the embodiment, as shown in fig. 1 to 8, a five-cylinder plunger pump with an integral power end structure comprises a power end assembly 1, ahydraulic end assembly 3 and areduction gearbox assembly 2, wherein one end of the power end assembly 1 is connected with thehydraulic end assembly 3, the other end of the power end assembly 1 is connected with thereduction gearbox assembly 2, the power end assembly 1 comprises a crankcase body, a crosshead body and aspacer 14, the crankcase body and the crosshead body are integrally welded to form apower end housing 5, thepower end housing 5 is connected with thespacer 14, thepower end housing 5 comprisesvertical plates 24,bearing seats 25, afront end plate 28, arear cover plate 23, a bottom plate 26, asupport plate 27 and anupper cover plate 29, the number of thevertical plates 24 is 6, the number of thebearing seats 25 is 6, onevertical plate 24 is correspondingly connected with one bearingseat 25, and the 6vertical plates 24 are arranged in parallel to form a power end cavity, a bottom plate 26 is arranged at the bottom of the power end cavity, anupper cover plate 29 is arranged at the top of the power end cavity, afront end plate 28 is arranged at the front end of the power end cavity, arear cover plate 23 is arranged at the rear end of the power end cavity, and asupport plate 27 is arranged between two adjacentvertical plates 24 which are arranged in parallel. The crankshaft box body and the crosshead box body in the power end assembly 1 of the five-cylinder plunger pump are in an integral welding structure, so that the structural strength of the power end assembly 1 is higher, the supporting stability is better, the bearing deformation of thepower end shell 5 can be effectively reduced, the vibration of the whole pump can be reduced, and the running stability of the five-cylinder plunger pump is improved.

The bottom of the crankcase body is provided with acrankshaft support body 20, and thecrankshaft support body 20 is used for supporting the crankcase body. The bottom of the crosshead box body is provided with acrosshead support body 21, and thecrosshead support body 21 is used for supporting the crosshead box body. The bottom of thespacing frame 14 is provided with ahydraulic support body 22, and thehydraulic support body 22 is used for supporting thehydraulic end assembly 3. The five-cylinder plunger pump adopts a multipoint support design, so that the support strength of the five-cylinder plunger pump can be improved, the vibration is reduced, the high-load operation is better ensured, and the operation is more stable.

Thecrankshaft 6 and thebearing 7 are arranged in the crankcase body, thecrankshaft 6 is integrally forged by alloy steel, thecrankshaft 6 comprises six shaft necks and five crank throws, one crank throw is arranged between every two adjacent shaft necks, and the cylinder spacing of the five-cylinder plunger pump is 13-14 inches. The design of increasing the cylinder interval is favorable to increasing the area of contact ofbent axle 6 and connectingrod axle bush 8,cross head 11 andslide rail 10, improves support strength. The high-power output of the five-cylinder plunger pump is guaranteed, the problem that the shale gas fracturing well site is small in area and many required fracturing equipment are effectively solved by the high-power five-cylinder plunger pump, the use of the equipment can be reduced, and the well site arrangement is facilitated. The number of thebearings 7 is 6, 6bearings 7 are arranged on six shaft necks, and the outer rings of thebearings 7 are assembled on 6 bearingseats 25 of thepower end shell 5, so that the rotary motion can be realized in thebearing seats 25.

Thecrankshaft 6 is internally provided with aspline 38, thereduction gearbox assembly 2 is connected with thepower end shell 5 through a bolt, thereduction gearbox assembly 2 is provided with an external spline, the external spline is connected with thespline 38 and used for power output, and the installation angle of thereduction gearbox assembly 2 can be adjusted according to input requirements. Adriving flange 4 is arranged outside thereduction gearbox assembly 2, and a power source is externally connected through the drivingflange 4 to realize power input.

The crosshead assembly is arranged in the crosshead box body, the connecting rod assembly is arranged between the crankcase body and the crosshead box body, thecrankshaft 6 is arranged in the crankcase body, one end of the connecting rod assembly is connected with thecrankshaft 6 through the connectingrod bearing bush 8, the other end of the connecting rod assembly is connected with the crosshead assembly through thecrosshead bearing bush 12, reciprocating swing can be achieved, and the other end of the crosshead assembly is connected with thepull rod 13. Thepull rod 13 is of a hollow structure. The connectingrod bearing bush 8 and thecrosshead bearing bush 12 are both steel-backed bearing bushes with alloy coatings. The width-diameter ratio is large, and the supporting strength is high.

Thepower end shell 5 is internally provided with a supportingplate 27 on which 2 slidingrails 10 are fixed, wherein the 2 slidingrails 10 form a semicircular space, and thecrosshead 11 is arranged in the semicircular space and can realize reciprocating linear motion.

The crosshead assembly is designed in a split structure and comprises acrosshead gland 41 and acrosshead 11, and thecrosshead gland 41 is connected with thecrosshead 11 so as to be convenient for assembling and disassembling with the connecting rod assembly.

The connecting rod assembly comprises a connectingrod cover 39 and a connectingrod body 9, the connectingrod cover 39 and the connectingrod body 9 are formed by cutting after integral forging, the strength is high, the connectingrod cover 39 and the connectingrod body 9 are connected through bolts, specifically, one end of the connectingrod body 9 is connected with a crank through the connectingrod cover 39, a connectingrod bolt 40 and a connectingrod bearing bush 8, and the other end of the connectingrod body 9 is connected with acrosshead 11 through acrosshead gland 41 and acrosshead bearing bush 12.Guide plates 42 are fixed to the upper and lower ends of thecrosshead 11 byscrews 43, and theguide plates 42 are made of a copper alloy material and directly contact theslide rail 10 to move relative to each other.

And lubricating oil paths are designed on thecrankshaft 6, the connectingrod body 9 and thecrosshead 11 and are used for lubricating thebearing 7, the connectingrod bearing bush 8 and thecrosshead bearing bush 12.

Thehydraulic end assembly 3 comprises avalve box 19, aplunger 18, aclamp 17 and the like, theplunger 18 and thepull rod 13 are connected together through theclamp 17 and are fixed on thespacing frame 14 through along screw 15 and anut 16, and thelong screw 15 is connected to thepower end shell 5 through threads.

The stroke of the five-cylinder plunger pump of the integrated power end structure is 11 inches. The long-stroke design is very suitable for the current shale gas fracturing zipper type operation requirement, the number of well site equipment is reduced, and the operation efficiency and the economical efficiency are improved.

Thereduction gearbox assembly 2 comprises aplanetary reduction gearbox 31 and aparallel reduction gearbox 30, one end of theplanetary reduction gearbox 31 is connected with the power end assembly 1, the other end of theplanetary reduction gearbox 31 is connected with theparallel reduction gearbox 30, secondary speed reduction of thereduction gearbox assembly 2 is achieved through theplanetary reduction gearbox 31 and theparallel reduction gearbox 30, and the reduction ratio is 8:1-15: 1. Theparallel reduction gearbox 30 comprises abull gear 36 and apinion gear 37 and performs primary reduction; theplanetary reduction gearbox 31 is a planetary gear mechanism consisting of anannular gear 32, fourplanetary gears 33, asun gear 34 and aplanet carrier 35 and performs secondary reduction. Thesun gear 34 is located in the center of the planetary gear mechanism, meshes with theplanet gears 33, and is coaxial with thelarge gear 36 of the parallelstage reduction gearbox 30. When the driving device operates, the external power source of the drivingflange 4 drives the input shaft to rotate, the input shaft is transmitted to thelarge gear 36 through thesmall gear 37 to realize primary speed reduction, the input shaft is transmitted to thesun gear 34 through thelarge gear 36, thesun gear 34 drives theplanet carrier 35 through theplanet gear 33 to realize secondary speed reduction, and finally power is transmitted to thecrankshaft 6 through thespline 38. The large transmission ratio can be obtained through two-stage speed change, the input torque is effectively reduced, and the stroke frequency of the pump is reduced.

The working principle is as follows: external power or rotating speed drive thereduction box assembly 2 to rotate through the drivingflange 4, power and torque are transmitted to thecrankshaft 6 through thespline 38 through two-stage speed change, thecrankshaft 6 and thebearing 7 rotate in thepower end shell 5 to drive the connectingrod body 9, thecrosshead 11 and thepull rod 13 to move, the rotating motion of thecrankshaft 6 is converted into reciprocating linear motion of thepull rod 13, and thepull rod 13 drives theplunger 18 to reciprocate in thevalve box 19 through thehoop 17, so that suction of low-pressure liquid and discharge of high-pressure liquid are realized, and pumping of the liquid is realized.

It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (4)

1. A five jar plunger pumps that multiple spot supported which characterized in that: including power end assembly, fluid end assembly and reducing gear box assembly, power end assembly includes the crankcase, cross head box and space stop, the crankcase, cross head box and space stop connect gradually, fluid end assembly is fixed on the space stop, the reducing gear box assembly is fixed on the crankcase, the bent axle supporter is established to the bottom of crankcase, the bent axle supporter is used for supporting the crankcase, the cross head supporter is established to the bottom of cross head box, the cross head supporter is used for supporting the cross head box, the hydraulic support body is established to the bottom of space stop, the hydraulic support body is used for supporting fluid end assembly.

2. The multi-point supported five-cylinder plunger pump of claim 1, wherein: the improved crosshead box is characterized in that the crankshaft box body and the crosshead box body are integrally welded to form a power end shell, the power end shell is connected with a spacer, the power end shell comprises vertical plates, bearing seats, a front end plate, a rear cover plate, a bottom plate, a supporting plate and an upper cover plate, the number of the vertical plates is 6, the number of the bearing seats is 6, one vertical plate is correspondingly connected with one bearing seat, the 6 vertical plates are arranged in parallel to form a power end cavity, the bottom of the power end cavity is provided with the bottom plate, the top of the power end cavity is provided with the upper cover plate, the front end of the power end cavity is provided with the front end plate, the rear end of the power end cavity is provided with the rear cover plate, and the supporting plate is arranged between the.

3. The multi-point supported five-cylinder plunger pump of claim 1, wherein: the crosshead assembly is arranged in the crosshead box body, the connecting rod assembly is arranged between the crankshaft box body and the crosshead box body, the crankshaft is arranged in the crankshaft box body, one end of the connecting rod assembly is connected with the crankshaft through a connecting rod bearing bush, the other end of the connecting rod assembly is connected with the crosshead assembly through a crosshead bearing bush, and the connecting rod bearing bush and the crosshead bearing bush are steel-backed bearing bushes with alloy coatings.

4. The multi-point supported five-cylinder plunger pump of claim 1, wherein: the cylinder spacing of the five-cylinder plunger pump is 13-14 inches.

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