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Load-sensitive control hydraulic system

A technology of load sensitive control and hydraulic system, which is applied in the direction of fluid pressure actuators, servo motors, servo motor components, etc., can solve the problems of increasing energy consumption, increasing installation space, and increasing costs, so as to save costs and improve Effects of Space Utilization and Reliability

Pending Publication Date: 2021-12-10
昆山晋桦豹胶轮车制造股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If each actuator does not share the load-sensitive pump, it is necessary to increase the pump, which means that the installation space will increase, the cost will increase, and the energy consumption will increase.

Method used

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  • Load-sensitive control hydraulic system

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Effect test

Embodiment

[0018] like figure 1 As shown, a load-sensitive control hydraulic system of the present invention includes a hydraulic oil tank 1, a load-sensitive pump 2, a shuttle valve 3, a flow amplifier 4, a steering gear 5, two steering cylinders 6 and a solenoid valve 7, and a load-sensitive pump 2 The S port is fed from the hydraulic oil tank 1, and the B port of the load-sensing pump 2 is connected to the HP port of the flow amplifier 4. The flow amplifier 4 and the steering gear 5 have correspondingly connected P port, T port, R port, L port and Ls port , the flow amplifier 4 is also provided with a CL port and a CR port which are inversely paralleled with the two steering cylinders 6, the EF port of the flow amplifier 4 is connected to the P port of the solenoid valve 7, and the flow amplifier 4 is also provided with a return oil to the hydraulic oil tank 1 The HT port of the shuttle valve 3 is connected to the Ls port of the flow amplifier 4 and the B port of the solenoid valve 7 ...

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Abstract

The invention belongs to the technical field of vehicle hydraulic systems and relates to a load-sensitive control hydraulic system which comprises a hydraulic oil tank, a load-sensitive pump, a shuttle valve, a flow amplifier, a steering gear, two steering oil cylinders and an electromagnetic valve. Oil enters a port S of the load-sensitive pump from the hydraulic oil tank, a port B of the load-sensitive pump is connected with an HP port of the flow amplifier, a port P, a port T, a port R, a port L and a port Ls which are correspondingly connected are formed in the flow amplifier and the steering gear respectively, a port CL and a port CR which are reversely connected with the two steering oil cylinders in parallel are further formed in the flow amplifier, a port EF of the flow amplifier is connected to a port P of the electromagnetic valve, a port HT for returning oil to the hydraulic oil tank is further formed in the flow amplifier, two oil inlets of the shuttle valve are connected to the port Ls of the flow amplifier and a port B of the electromagnetic valve respectively, an oil outlet of the shuttle valve is connected to a port X of the load-sensitive pump, and a port L1 for draining oil to the hydraulic oil tank is further formed in the load-sensitive pump. By using the hydraulic system, a function of a load-sensitive valve is achieved at low cost, and the space utilization rate and reliability are improved.

Description

technical field [0001] The invention relates to the technical field of vehicle hydraulic systems, in particular to a load-sensitive control hydraulic system. Background technique [0002] At present, due to the requirements of energy saving and environmental protection, more and more hydraulic systems use variable systems. One of the variable systems is the load-sensing hydraulic system. The principle of the load-sensitive hydraulic system is to control the output of the pressure and flow of the pump according to the requirements of the load, because it is supplied as much as the load demands, so that the power loss is less and the efficiency is much higher than that of the conventional hydraulic system. [0003] In the prior art solution, a load-sensitive pump and a load-sensitive valve are required to be used together, and the control precision of the load-sensitive valve is high, and it is easy to realize synchronous and fast-response control. But load-sensing valves ar...

Claims

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Application Information

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IPC IPC(8): F15B11/16F15B13/01F15B13/02F15B13/06F15B13/044
CPCF15B11/165F15B13/02F15B13/06F15B13/01F15B2013/0448
Inventor 李磊冯海涛韦保新
Owner 昆山晋桦豹胶轮车制造股份有限公司
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