CN105133686A - Energy-saving and efficient excavator hydraulic system - Google Patents

Abstract

The invention discloses an energy-saving and efficiency excavator hydraulic system. The energy-saving and efficiency excavator hydraulic system comprises a power component, an execution component and a control component, wherein the power component comprises an engine and an oil pump device; the engine is connected with the oil pump device through a pipeline and is used for transmitting mechanical energy to the oil pump device; the oil pump device is used for converting the mechanical energy to hydraulic energy and transmitting the hydraulic energy; the execution component comprises a bucket hydraulic cylinder, a rotary motor, a bucket rod hydraulic cylinder and a movable arm hydraulic cylinder; the execution component is connected with the oil pump device through the pipeline and is used for receiving the hydraulic energy transmitted by the oil pump device and converting the hydraulic energy back to the mechanical energy so as to implement various actions of the excavator; the control component comprises an overflow valve, a distribution valve unit and an unloading overflow valve which are arranged between the oil pump device and the execution component and are used for distributing and controlling the hydraulic pressure. According to the energy-saving and efficiency excavator hydraulic system, various actions are efficiently implemented while the oil consumption of the excavator is reduced; the pressure state of the hydraulic system is monitored; the reliability of the excavator in use is improved.

Description

A kind of efficient energy-saving excavator hydraulic system

Technical field

The present invention relates to a kind of efficient energy-saving excavator hydraulic system.

Background technology

Hydraulic crawler excavator is a kind of multi-functional mechanical, is widely used in hydraulic engineering at present, communications and transportation, in the mechanical execution such as power engineering and mine excavation, plays a very important role in Accelerating The Construction speed and in raising labour productivity.Hydraulic system is the core of excavator, from the hydraulic technique application sixties in 20th century on board a dredger so far, excavator hydraulic system development, the excavator manufacturer of countries in the world adopts various new and high technology to improve oneself excavator competitiveness in the world, is mainly manifested in five aspects: hydraulic system changes from open system to closed system; The power-saving technology of system becomes research emphasis; High-pressure trend and the high reliability development trend of system highlight day by day; The handling characteristic of system rises to very consequence; Hydraulic system and electronic system control to be combined into trend.Current minimizing hydraulic system power runs off, improve the utilization rate of motor, improve excavator reliability in use, the reliability of digging system is more and more subject to the attention of research and development personnel, because the working environment of hydraulic crawler excavator is often very severe, can each functional unit continue normal work and just receiving the especially attention of engineering operation and maintenance personnel at rugged environment.

Summary of the invention

The object of this invention is to provide a kind of efficient energy-saving excavator hydraulic system, the present invention, when reducing excavator oil consumption, efficiently completes each action simultaneously, monitors the pressure state of hydraulic system, improves excavator reliability in use.

Technical scheme provided by the invention is:

A kind of efficient energy-saving excavator hydraulic system, comprising:

Dynamical element, it comprises motor and oil pump device, and described motor is connected with described oil pump device by pipeline, and described motor is to described oil pump device transmit mechanical power, and changes mechanical energy is hydraulic energy and transmits by described oil pump device;

Executive component, it comprises bucket hydraulic cylinder, rotary motor, dipper hydraulic cylinder and swing arm hydraulic cylinder, described executive component is connected with described oil pump device by pipeline, and receives the hydraulic energy of described oil pump device transmission and return its turn into mechanical energy, realizes the various actions of excavator;

Control element, it comprises overflow valve, distributing valve group and unloading overflow valve.Described overflow valve, distributing valve group and unloading overflow valve are arranged between described oil pump device and described executive component, distribute hydraulic control pressure.

Preferably, in described efficient energy-saving excavator hydraulic system, described oil pump device is by the first oil pump, and the second oil pump and general power adjuster form,

Preferably, described efficient energy-saving excavator hydraulic system, also comprises pressure meter, pressure meter be arranged on connect described oil pump oil-out total oil line pipe on, show the hydraulic pressure of whole hydraulic system.

Preferably, described efficient energy-saving excavator hydraulic system, also comprises fuel tank, and it is configured with radiator and oil filter to control temperature and the cleannes of fluid.

Preferably, in described efficient energy-saving excavator hydraulic system, described first oil pump and the second oil pump are two-way variable displacement pump.

Preferably, in described efficient energy-saving excavator hydraulic system, described executive component also comprises front leg strut oil cylinder and rear support leg oil cylinder, and its in-line pipeline is provided with swivel coupling.

Preferably, in described efficient energy-saving excavator hydraulic system, described control element also comprises sequence valve and hydraulic lock, controls the hydraulic pressure of front leg strut oil cylinder and rear support leg oil cylinder.

Preferably, in described efficient energy-saving excavator hydraulic system, described control element also comprises one-way throttle valve, and it is composed in parallel by one way valve and choke valve, is arranged on the oil line pipe of swing arm hydraulic cylinder in described executive component, the flow of hydraulic control oil.

The invention has the beneficial effects as follows the loss reducing hydraulic system power, improve the utilization rate of motor, improve excavator reliability in use, improve the harmony of composite move simultaneously, accuracy, carry out monitoring to the hydraulic fluid flow rate of whole system and pressure to regulate, improve stability and the safety of hydraulic system.

Accompanying drawing explanation

Fig. 1 is hydraulic system principle figure of the present invention;

Detailed description of the invention

Below in conjunction with accompanying drawing, the present invention is described in further detail, can implement according to this with reference to manual word to make those skilled in the art.

As shown in Figure 1, a kind of efficient energy-saving excavator hydraulic system mainly comprises dynamical element, executive component and control element.Dynamical element comprises motor 23, first oil pump 17 and the second oil pump 24, two oil pumps are two-way variable displacement pump, two oil pumps carry out regulating power by general power adjuster 18, motor 23 is connected with two oil pumps by pipeline, motor is that working media is to described oil pump device transmit mechanical power with hydraulic oil, to take hydraulic oil as working media transmit changes mechanical energy for hydraulic energy oil pump device, total oil line pipe of oil pump oil-out is provided with pressure meter 15, show the hydraulic pressure of whole hydraulic system, to control the hydraulic state of whole system in time, also comprise fuel tank 19, it stores the hydraulic oil required for whole system, and be configured with radiator 21 and oil filter 20 to control temperature and the cleannes of fluid.Executive component, comprises bucket hydraulic cylinder 14, rotary motor 5, dipper hydraulic cylinder 3 and swing arm hydraulic cylinder 1, described executive component is connected with described oil pump device by pipeline, and receives the hydraulic energy of described oil pump device transmission and return its turn into mechanical energy, realizes the various actions of excavator; Control element, it comprises overflow valve 13, distributing valve group 12 and unloading overflow valve 4.Described overflow valve 13, distributing valve group 12 and unloading overflow valve 4 are arranged between described oil pump device and described executive component, distribute hydraulic control pressure, the oil line pipe of wherein swing arm hydraulic cylinder 1 is also provided with one-way throttle valve 2, one-way throttle valve 2 is composed in parallel by one way valve and choke valve, control the flow of hydraulic oil in swing arm hydraulic cylinder 1, executive component also comprises front leg strut oil cylinder 6 and rear support leg oil cylinder 7, its in-line pipeline is provided with swivel coupling 11, also be provided with sequence valve 10 and hydraulic lock 8, control the hydraulic pressure of front leg strut oil cylinder 6 and rear support leg oil cylinder 7, make front leg strut oil cylinder 6 and rear support leg oil cylinder 7 can separate with other executive components like this to control, the action of front leg strut and rear support leg can be controlled separately, more coordinate when making excavator carry out composite move, save oil consumption.

Although embodiment of the present invention are open as above, but it is not restricted to listed in manual and embodiment utilization, it can be applied to various applicable the field of the invention completely, for those skilled in the art, can easily realize other amendment, therefore do not deviating under the universal that claim and equivalency range limit, the present invention is not limited to specific details and illustrates here and the legend described.

Claims (8)

1. an efficient energy-saving excavator hydraulic system, is characterized in that, comprising:

Dynamical element, it comprises motor and oil pump device, and described motor is connected with described oil pump device by pipeline, and described motor is to described oil pump device transmit mechanical power, and changes mechanical energy is hydraulic energy and transmits by described oil pump device;

Executive component, it comprises bucket hydraulic cylinder, rotary motor, dipper hydraulic cylinder and swing arm hydraulic cylinder, described executive component is connected with described oil pump device by pipeline, and receives the hydraulic energy of described oil pump device transmission and return its turn into mechanical energy, realizes the various actions of excavator;

Control element, it comprises overflow valve, distributing valve group and unloading overflow valve.Described overflow valve, distributing valve group and unloading overflow valve are arranged between described oil pump device and described executive component, distribute hydraulic control pressure.

2. efficient energy-saving excavator hydraulic system as claimed in claim 1, is characterized in that, described oil pump device is by the first oil pump, and the second oil pump and general power adjuster form.

3. efficient energy-saving excavator hydraulic system as claimed in claim 2, is characterized in that, also comprise pressure meter, pressure meter be arranged on connect described oil pump oil-out total oil line pipe on, show the hydraulic pressure of whole hydraulic system.

4. efficient energy-saving excavator hydraulic system as claimed in claim 3, is characterized in that, also comprise fuel tank, and it is configured with radiator and oil filter to control temperature and the cleannes of fluid.

5. efficient energy-saving excavator hydraulic system as claimed in claim 4, it is characterized in that, described first oil pump and the second oil pump are two-way variable displacement pump.

6. efficient energy-saving excavator hydraulic system as claimed in claim 5, it is characterized in that, described executive component also comprises front leg strut oil cylinder and rear support leg oil cylinder, and its in-line pipeline is provided with swivel coupling.

7. efficient energy-saving excavator hydraulic system as claimed in claim 6, it is characterized in that, described control element also comprises sequence valve and hydraulic lock, controls the hydraulic pressure of front leg strut oil cylinder and rear support leg oil cylinder.

8. efficient energy-saving excavator hydraulic system as claimed in claim 7, it is characterized in that, described control element also comprises one-way throttle valve, and it is composed in parallel by one way valve and choke valve, be arranged on the oil line pipe of swing arm hydraulic cylinder in described executive component, the flow of hydraulic control oil.