Pressure-reduction type balance hydraulic lock

A hydraulic lock and balance technology, applied to valve details, multi-way valves, engine components, etc., can solve the problems of accidental opening of hydraulic control check valves, poor versatility and flexibility, and high manufacturing costs, so as to prevent load from stalling and dropping, Sensitive movement and strong versatility

Inactive Publication Date: 2012-08-22
蒋晓军
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The advantages and disadvantages of existing hydraulic control check valves and balance valves are: the advantages of hydraulic control check valves are reliable locking and high static safety; the disadvantage is that high-frequency jitter is easily generated during the dynamic downlink process of the load, resulting in extreme system failure. Unstable; another disadvantage is the possibility of the hydraulically operated check valve accidentally opening due to jolts caused by moving equipment
[0007] Its deficiency of above-mentioned patent is: the structure is comparatively complicated, and manufacturing cost is higher, and its versatility and flexibility are relatively poor

Method used

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  • Pressure-reduction type balance hydraulic lock
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  • Pressure-reduction type balance hydraulic lock

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] See Figure 1~3 , this embodiment includes a valve body 1 ( figure 2 shown), the first ferrule 19 ( image 3 shown).

[0028] One end of the valve body 1 is provided with an inner cavity, which is composed of a first insertion hole P1, a first oil chamber K, a control piston installation hole t, and a second oil chamber m from left to right.

[0029] See figure 1 , 2 , the first oil port A1 communicates with the first oil chamber K, the second oil port A2 communicates with the first insertion hole P1, the third oil port B1 and the fourth oil port B2 communicate with the second oil chamber m respectively.

[0030] See figure 1 , 2 , the first ferrule 19 is installed in the first insertion hole P1; the first porous plate 15 is pressed by the first ferrule 19 on the first positioning end surface S1 of the valve body 1 (see the first positioning end surface S1 figure 2 ).

[0031] The control piston 18 is installed in the control piston installation hole t, and th...

Embodiment 2

[0044] See figure 2 , 4 , 5, the valve body 1 in this embodiment is the same as the valve body in Embodiment 1, the difference is that: the first ferrule 19 also includes a fourth spring 8, a spring guide rod 12, a pressure relief valve 13 , Pressure relief hole j. Wherein, the pressure relief hole j is arranged in the middle of the front end of the main valve core 10, and the pressure relief valve 13, the spring guide rod 12 and the fourth spring 8 are arranged at the rear end of the pressure relief hole j; the fourth spring 8 compresses the pressure relief valve 13 On the pressure relief hole j.

[0045] In this embodiment, the pressure relief valve 13 is first opened to release the pressure in the fourth oil chamber f, and then the main valve core 10 is opened. However, in Embodiment 1, the main valve core 10 is first opened to release pressure from the fourth oil chamber f through the orifice n. Because the pressure receiving area of ​​the pressure relief valve 13 is ...

Embodiment 3

[0051] See Figure 6 , 7 , and see image 3 The first ferrule, the first ferrule in this embodiment is the same as the first ferrule in Embodiment 1.

[0052] The difference between this embodiment and Embodiment 1 is that the front end of the second oil chamber m is also connected with a second insertion hole P2 with the same structure as the first insertion hole P1, and a second ferrule with the same structure as the first ferrule 19 20 is installed in the second insertion hole P2; the second perforated plate 155 is pressed against the second positioning end surface S2 of the valve body 1 by the second ferrule 20 . A second limit pad 177 is arranged at the front end of the control piston 18 . The fifth spring 166 is installed between the second limiting pad 177 and the second perforated plate 155 , and the fourth oil port B2 communicates with the second insertion hole P2 .

[0053] Embodiment 1 can only control one chamber of the oil cylinder, and can only control the ru...

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PUM

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Abstract

The invention discloses a pressure-reduction type balance hydraulic lock, comprising a valve body and a first mortise, wherein one end of the valve body is provided with an inner cavity, and the inner cavity is internally provided with a first insertion hole, a first oil cavity, a control piston mounting hole and a second oil cavity in sequence. A first oil port is communicated with the first oilcavity, a second oil port is communicated with the first insertion hole, and a third oil port and a fourth oil port is respectively communicated with the second oil cavity. The first mortise is arranged in the first insertion hole; the control piston is arranged in the control piston mounting hole, and a first limit cushion is arranged at the rear end of the control piston; and a third spring is arranged between the first limit cushion and a first porous plate. The lock disclosed by the invention has the advantages of reliability, high static safety and strong universality, and can overcome the phenomenon of high-frequency or low-frequency jitter.

Description

technical field [0001] The invention relates to a hydraulic control valve, in particular to a decompression balance hydraulic lock used in hydraulic systems of engineering machinery and hoisting machinery. Background technique [0002] In modern engineering machinery, construction machinery, ships, industrial machinery and other mechanical equipment, hydraulic load-bearing systems are widely used. In order to achieve load locking, a large number of balance valves and hydraulic control check valves are used, so the performance of balance valves and hydraulic control check valves directly affects the performance of the whole machine. The advantages and disadvantages of existing hydraulic control check valves and balance valves are: the advantages of hydraulic control check valves are reliable locking and high static safety; the disadvantage is that high-frequency jitter is easily generated during the dynamic downlink process of the load, resulting in extreme system failure. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K11/044F16K11/14F16K31/122F16K47/04
Inventor 蒋晓军
Owner 蒋晓军
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