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Hydrodynamic compensation balance valve

A technology of compensation balance and hydraulic power, applied in the direction of fluid pressure actuation device, servo motor assembly, mechanical equipment, etc., can solve the problems of balance valve sealing points, difficult processing, increase leakage points, etc., to achieve load-flow Compensation, improving fretting performance, and the effect of fewer sealing points

Active Publication Date: 2020-10-27
JIANGSU ADVANCED CONSTR MASCH INNOVATION CENT LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The prior art has the following defects: (1) The existing balance valve with overcompensation function used in the hydraulic system of construction machinery is equipped with an overcompensation damping structure through the pilot valve core, which has complex structure, large volume and high cost;
[0005] (2) After the overcompensation function is added to the balance valve used in the hydraulic system of construction machinery, the balance valve has many sealing points, increases leakage points, and is difficult to process

Method used

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Examples

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Embodiment 1

[0043] Such as figure 1 , figure 2 , image 3 As shown, a hydraulic power compensation balance valve includes: pilot control end cover assembly, balance valve body assembly, valve core assembly, one-way valve seat assembly;

[0044] The pilot control end cover assembly includes a control end cover valve body 24, which is provided with a pilot oil port X and a pilot oil passage 25; the spool assembly includes a throttle spool 6, a main spring 17, and a regulating valve seat 20 The one-way valve seat assembly includes a one-way valve 7 and one-way valve spring 13; the balance valve body assembly includes a balance valve body 12 and a valve seat 14, and the balance valve body 12 is provided with oil port B and oil port A, It is also provided with a valve core hole for installing the throttle valve core 6 and the check valve assembly;

[0045] The valve body 24 of the control end cover is fixed and sealed with the left end of the balance valve body 12, the valve seat 14 is fix...

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PUM

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Abstract

The invention discloses a hydrodynamic compensation balance valve. A pilot control end cover assembly comprises a control end cover valve body, and a pilot oil channel is arranged on the control end cover valve body; a valve element assembly comprises a throttling valve element, a main spring and an adjusting valve seat; a one-way valve seat assembly comprises a one-way valve and a one-way valve spring; a balance valve body assembly comprises a balance valve body and a valve seat; the throttling valve element is provided with a throttling opening with the angle of alpha; the right end inner wall conical surface of the one-way valve is mutually matched with a throttling opening conical surface of the throttling valve element to form opening and closing sealing; and the one-way valve moves to the left when the amplitude of variation rises, the one-way valve function of the balance valve to an oil opening B from an oil opening A is realized, the throttling valve element is started to theright under the action of pilot control pressure when the amplitude of variation declines, the balance valve function from the oil opening B to the oil opening A is realized, with the increasing of loading pressure, the opening size of the throttling opening of the throttling valve element is controlled by hydrodynamics generated by an annular overcurrent channel with the angle of the throttling valve element of alpha, and load-flow compensation is realized.

Description

technical field [0001] The invention belongs to the technical field of engineering machinery and relates to a hydraulic power compensation balance valve. Background technique [0002] When the hydraulic system of construction machinery is working, if the load of the hydraulic cylinder is a vertical and horizontal load, and the direction of movement and gravity are consistent with the direction of the force, a balance valve must be used to generate oil flow resistance on the circuit to prevent the movement from losing control. Especially in the luffing system of the crane, the requirements for the balance valve are higher. The load moment arm increases due to the change of the luffing drop angle, and at the same time, the increase of the load pressure causes the luffing drop speed to become faster and faster, which is likely to cause safety accidents. Therefore, It is necessary to design a compensation function for the luffing balance valve that can effectively suppress the s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B13/02
CPCF15B13/02F15B13/026
Inventor 翟亚楠苏丹枫程伟
Owner JIANGSU ADVANCED CONSTR MASCH INNOVATION CENT LTD
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