Buffer valve, rotation hydraulic system and crane

A technology of buffer valve and hydraulic oil, applied in the field of hydraulic components, can solve problems such as difficulty, high cost, poor effect, etc., and achieve the effect of good buffering and reset effect.

Active Publication Date: 2020-08-25
SANY AUTOMOBILE HOISTING MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the conversion between static friction and dynamic friction, the impact of the left and right swing of the load, and the factor of the backlash of the rotary gear, it is difficult to eliminate the problem of start-stop impact
[0003] The rotary valves produced by some domestic manufacturers have various cushioning principles, but the effect is poor
The shock valves produced abroad have complex principles, and due to matching problems, the actual application effect is not good, and the cost is high

Method used

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  • Buffer valve, rotation hydraulic system and crane
  • Buffer valve, rotation hydraulic system and crane
  • Buffer valve, rotation hydraulic system and crane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0031] As an implementation, the variable displacement assembly includes a second chamber 210, a variable displacement piston 220 and an elastic member. The second chamber 210 is arranged on the buffer valve body 100 and communicates with the first chamber 110. The parts are all disposed in the second chamber 210 , and the elastic part is located on the side of the variable displacement piston 220 facing away from the first chamber 110 , so that the variable displacement piston 220 has a tendency to move close to the first chamber 110 .

[0032] Specifically, the hydraulic oil flowing out from the shuttle valve 300 enters the left end of the first chamber 110 through the first oil passage, and the hydraulic oil of the buffer spool 400 figure 2 The left end surface shown produces force, and the original hydraulic oil on the right side of the buffer spool 400 pushes the variable displacement piston 220 to move to the right and enters the second chamber 210, preventing the origin...

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Abstract

The invention provides a buffer valve, a rotation hydraulic system and a crane, and relates to the technical field of hydraulic elements. The buffer valve provided by the invention comprises a buffervalve body, a variable volume assembly, a shuttle valve and a buffer valve core; the buffer valve body is provided with a first cavity, a first oil opening and a second oil opening, and the variable volume assembly communicates with the first cavity; two oil inlets of the shuttle valve communicate with the first oil opening and the second oil opening one to one, oil outlets of the shuttle valve communicate with a first oil path and a second oil path, the first oil path communicates with the end, away from the variable volume assembly, of the first cavity, the second oil path communicates withthe communication portion between the first cavity and the variable volume assembly, and the second oil path is provided with damping; and the buffer valve core is arranged in the first cavity. According to the buffer valve provided by the invention, the technical problem that in the correlation technique, when a crane conducts rotation action, the effect on start and stop impact eliminating problem is poor is solved.

Description

technical field [0001] The invention relates to the technical field of hydraulic components, in particular to a buffer valve, a rotary hydraulic system and a crane. Background technique [0002] The performance of the crane's slewing action directly affects the accuracy and comfort of the hoisting. Due to the large fluctuation of the slewing load, the start and stop of the action is very easy to produce impact. However, due to the conversion between static friction and dynamic friction, the impact of the left and right swing of the load, and the factor of the backlash of the rotary gear, it is difficult to eliminate the problem of start-stop impact. [0003] The rotary valves produced by some domestic manufacturers have various cushioning principles, but the effect is poor. The shock valves produced abroad have complicated principles, and due to matching problems, the effect in practical applications is not good, and the cost is high. Contents of the invention [0004] T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B13/04F15B11/08F15B1/02B66C23/86
CPCF15B13/0401F15B13/0407F15B11/08F15B1/024B66C23/86F15B2211/212F15B2211/305
Inventor 王涛廖小宁梁凯
Owner SANY AUTOMOBILE HOISTING MACHINERY
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