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Shock valve, slewing hydraulic system and crane

A buffer valve and hydraulic oil technology, applied in the field of hydraulic components, can solve problems such as difficulty, poor effect, and poor effect

Active Publication Date: 2022-06-17
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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  • Shock valve, slewing hydraulic system and crane
  • Shock valve, slewing hydraulic system and crane
  • Shock valve, slewing hydraulic system and crane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0031] As an embodiment, the variable volume assembly includes a second chamber 210, a variable volume piston 220 and an elastic member. The second chamber 210 is provided in the buffer valve body 100 and communicates with the first chamber 110. The variable volume piston 220 and the elastic member The elastic members are all disposed in the second chamber 210 , and the elastic member is located on the side of the variable volume piston 220 away from the first chamber 110 , so that the variable volume piston 220 has a tendency to move closer 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 path, and has a negative impact on the buffer valve core 400 figure 2 The shown left end face generates a force, and the original hydraulic oil on the right side of the buffer spool 400 pushes the variable volume piston 220 to move to the right and enters the second ch...

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Abstract

The invention provides a buffer valve, a rotary hydraulic system and a crane, and relates to the technical field of hydraulic components. The buffer valve provided by the invention includes: a buffer valve body, a variable capacity assembly, a shuttle valve and a buffer valve core. The buffer valve body is equipped with The first chamber, the first oil port and the second oil port, the variable volume component communicates with the first chamber; the two oil inlets of the shuttle valve communicate with the first oil port and the second oil port one by one, and the shuttle valve The oil outlet of the valve communicates with the first oil passage and the second oil passage, the first oil passage communicates with the end of the first chamber away from the variable capacity assembly, the second oil passage communicates with the first chamber and the variable capacity assembly connected, the second oil passage is provided with damping, and the buffer valve core is provided in the first chamber. The buffer valve provided by the invention alleviates the technical problem in the related art that the effect of eliminating the impact of starting and stopping is not good when the crane rotates.

Description

technical field [0001] The invention relates to the technical field of hydraulic components, in particular to a buffer valve, a swing hydraulic system and a crane. Background technique [0002] The performance of the slewing action of the crane 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 are very prone to shocks. However, due to the conversion between static friction and dynamic friction, the influence of the load swinging from side to side, and the factor of the backlash of the rotating gear, it is difficult to eliminate the start-stop impact problem. [0003] The rotary valves produced by some domestic manufacturers have various buffering principles, but the effect is poor. The principle of the shock valve produced abroad is complex, due to the matching problem, the effect is not good in practical application, and the cost is high. SUMMARY OF THE INVENTION [0004] A first...

Claims

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Application Information

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Patent Type & Authority Patents(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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