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Overflow valve and hydraulic motor with same

A technology of hydraulic motors and relief valves, applied in servo motor components, fluid pressure actuating devices, devices for absorbing fluid energy in valves, etc., can solve the problems of long opening and closing time of relief valves affecting the operation performance of power equipment, etc. To achieve the effect of easy installation and prevent leakage problems

Pending Publication Date: 2022-07-26
杭州力龙液压有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defects in the prior art that the long opening and closing time of the relief valve affects the operation performance of the power equipment, thereby providing a relief valve and a hydraulic motor with it

Method used

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  • Overflow valve and hydraulic motor with same
  • Overflow valve and hydraulic motor with same
  • Overflow valve and hydraulic motor with same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] like Figure 1 to Figure 3 , Figure 5 to Figure 8 As shown, an overflow valve provided in this embodiment includes a valve body 1, a valve core 2 and a pressure regulating spring 3. The valve body 1 is provided with an inlet 11 and an outlet 12 for medium circulation, and the pressure regulating spring 3 is provided with At one end of the valve core 2, the inlet 11 is closed by driving the valve core 2. The valve core 2 includes: a blocking part 21, which is arranged at one end of the valve core 2 away from the pressure regulating spring 3, and a cone is formed on the peripheral surface of the blocking part 21 surface 211, the tapered surface 211 is suitable for abutting against the inlet 11 to close the inlet 11; and the shoulder 22 arranged at an interval from the blocking portion 21; wherein, the taper of the tapered surface 211 is θ, and the value range of θ is [59.5, 60.5] degrees; and in the axial direction of the valve core 2, there is a shortest distance L bet...

Embodiment 2

[0090] like Figure 4 As shown, a hydraulic motor provided in this embodiment includes: a base body 7, an end cover of the hydraulic motor in this embodiment, and a relief valve A arranged on the base body 7, the inlet 11 of the relief valve A and the hydraulic pressure The oil inlet chamber 71 of the motor is communicated with, and the outlet is communicated with the oil return chamber 72 of the hydraulic motor.

[0091] In this embodiment, two relief valves are arranged on the oil inlet chamber 71 and the oil outlet chamber 72, and the base body 7 is also provided with a buffer chamber 73. The buffer strength 73 is communicated with the oil inlet chamber 71 and the oil outlet chamber 72 respectively, and The outlets 12 of the two relief valves are both communicated with the buffer chamber 73 . In hydraulic motors, the oil inlet chamber and the oil outlet chamber can generally be switched according to the working state of use. In order to ensure that when the oil inlet chamb...

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Abstract

The invention relates to the technical field of hydraulic control valves, in particular to an overflow valve and a hydraulic motor with the same. An overflow valve comprises a valve body, a valve element and a pressure adjusting spring, the valve body is provided with an inlet and an outlet for medium circulation, the pressure adjusting spring is arranged at one end of the valve element so as to drive the valve element to seal the inlet, the valve element comprises a plugging part and a sealing part, the plugging part is arranged at the end, away from the pressure adjusting spring, of the valve element, and a conical surface is formed on the circumferential surface of the plugging part; the conical surface is suitable for abutting against the inlet to seal the inlet; the blocking shoulder and the blocking part are arranged at an interval; wherein the taper of the conical surface is theta, and the value range of theta is [59.5, 60.5] degrees; and in the axial direction of the valve core, the shortest distance L exists between the retaining shoulder and the plugging part, and the value range of the L is [1.3, 1.4] mm. A fluid simulation experiment shows that the resultant value of the hydraulic force and the jet force of the valve element structure within the value range is small, the obstruction to opening and closing of the valve element is small, and it can be guaranteed that the valve element is opened and closed more rapidly.

Description

technical field [0001] The invention relates to the technical field of hydraulic control valves, in particular to a relief valve and a hydraulic motor having the same. Background technique [0002] When excavators and other power equipment are started and braked, the load of the traveling mechanism will increase instantaneously, resulting in a large internal impact of the traveling mechanism, and the related parts will be severely worn when they are impacted, shortening their service life. [0003] In order to reduce the negative impact of the hydraulic shock caused by the instantaneous increase of the load, a buffer type relief valve is usually installed in the appropriate position of the hydraulic system, such as the end cover of the hydraulic motor. When the buffer type relief valve is used, the rear end of the valve core is provided with a return spring, and the return spring abuts the valve core at the oil inlet to close the oil port. When the load increases, the high-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K17/06F16K17/164F16K47/04F16K1/38F16K1/44F16K27/02F15B13/02
CPCF16K17/06F16K17/164F16K47/04F16K1/38F16K1/44F16K27/0254F15B13/024
Inventor 李新峰杨凯越刘宝玉
Owner 杭州力龙液压有限公司