CN216447222U - Balance valve with residual opening - Google Patents
Balance valve with residual opening Download PDFInfo
- Publication number
- CN216447222U CN216447222U CN202123457234.3U CN202123457234U CN216447222U CN 216447222 U CN216447222 U CN 216447222U CN 202123457234 U CN202123457234 U CN 202123457234U CN 216447222 U CN216447222 U CN 216447222U
- Authority
- CN
- China
- Prior art keywords
- valve
- cavity
- balance
- cover
- valve body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Check Valves (AREA)
Abstract
The utility model relates to a balance valve with a residual opening, which comprises a valve body, wherein a balance valve core assembly is arranged on the valve body, and an oil inlet and an oil return opening are formed in the valve body; an oil inlet cavity, an oil return cavity and a balance cavity are arranged in the valve body, the oil inlet and the oil return port are arranged on two sides of the balance cavity, and the oil inlet cavity and the oil return cavity are arranged on two sides of the balance cavity; two groups of check valve assemblies are symmetrically arranged in the valve body and are respectively arranged on two sides of the balance cavity; the check valve assembly comprises a first valve cover, the first valve cover is in threaded connection with the inside of the valve body, and a radial hole X is formed in the first valve cover; a first valve core is arranged in the first valve cover, and a throttling hole Y is formed in the first valve core; the balance valve core assembly comprises a main valve core, and a throttling hole W is formed in the main valve core. The utility model can prevent the impact of the walking motor, eliminate the cavitation of the low-pressure cavity and avoid over-high impact pressure of the high-pressure cavity.
Description
Technical Field
The utility model relates to a balance valve with a residual opening, and belongs to the technical field of engineering machinery.
Background
In a traveling machine driven by a hydraulic motor, various valves are arranged in a main oil path in a common traveling device, and the main purpose of the valves is to prevent hydraulic oil from reversely impacting and prevent the hydraulic oil in the traveling motor from flowing to front hydraulic elements such as an impact pump and a valve. The balance valve is a check valve for preventing front-end hydraulic components such as a hydraulic oil impact pump and a valve in a walking motor when the walking motor stops, the existing balance valve is structurally shown in fig. 1 and comprises a balance valve body 101, a balance valve core 102 and a symmetrically arranged check valve group, the check valve group comprises a check valve cover 103 and a check valve core 104, when the balance valve core 102 is in a middle position, the whole balance valve is generally stopped, namely when an oil inlet and an oil return port of a main oil way do not have the action of high-pressure oil, a high-pressure cavity and a low-pressure cavity of a motor cylinder body are stopped through the balance valve, and therefore when the walking machine stops, the hydraulic oil in the walking motor cannot impact the front-end hydraulic components such as the pump valve. However, when the balance valve core returns to the middle position, a high pressure difference will occur in the high-pressure cavity and the low-pressure cavity in the walking motor, and even if the balance valve is arranged, the phenomenon that the high-pressure cavity and the low-pressure cavity impact at the same time while absorbing air can possibly occur, the phenomenon that the high-pressure cavity and the low-pressure cavity impact at the same time cannot be avoided, so that the influence on the service life of the motor is great, the phenomenon that the air absorption cavity can generate cavitation erosion can possibly occur, and the high-pressure cavity can cause the motor to fail due to the overhigh impact pressure. Therefore, the problem that the pressure difference between the high-pressure chamber and the low-pressure chamber in the walking motor chamber is too large after the valve core of the balance valve returns to the middle position needs to be solved.
SUMMERY OF THE UTILITY MODEL
The utility model provides a balance valve with a residual opening, aiming at the problem that the pressure difference between a high pressure cavity and a low pressure cavity in a motor is overlarge when the existing balance valve is in a neutral position. The main purpose of this design is when the walking motor stops for the high low pressure chamber of walking motor cylinder body links to each other through the orifice, when preventing that the walking motor from impacting front end hydraulic components such as pump, valve, both eliminated the low pressure chamber cavitation erosion phenomenon, also be so that the high pressure chamber's impulse pressure is too high.
The technical scheme for solving the technical problems is as follows:
a balance valve with a residual opening comprises a valve body, wherein a balance valve core assembly is arranged on the valve body, and an oil inlet and an oil return opening are formed in the valve body; an oil inlet cavity, an oil return cavity and a balance cavity are arranged in the valve body, the oil inlet and the oil return port are respectively arranged on two sides of the balance cavity, and the oil inlet cavity and the oil return cavity are respectively arranged on two sides of the balance cavity; two groups of check valve assemblies are symmetrically arranged in the valve body and are respectively arranged on two sides of the balance cavity; the check valve assembly comprises a first valve cover, the first valve cover is in threaded connection with the inside of the valve body, and a radial hole X is formed in the first valve cover; a first valve core is arranged in the first valve cover, the first valve core is installed in the first valve cover through a first spring, a throttling hole Y is formed in the first valve core, and the throttling hole Y is communicated with the radial hole X; the balance valve core assembly comprises a main valve core, wherein a throttling hole W is formed in the main valve core, and the throttling hole W is communicated with the oil inlet cavity and the oil return cavity.
The utility model has the beneficial effects that: through the orifice that is equipped with on the main valve core of balanced valve and on the check valve subassembly, couple together the high low pressure chamber of motor cylinder body, when the motor stops, when the main valve core of balanced valve gets back to the meso position, pressure differential between the high low pressure chamber can not be too big, the impact force in high pressure chamber is unlikely to too big, the low pressure chamber can not appear inhaling the condition that the air loses, the process that the walking machinery stopped can be more gentle, when improving walking motor life greatly, driver's operation impression and the travelling comfort of the process of stopping have also been improved
On the basis of the technical scheme, in order to achieve the convenience of use and the stability of equipment, the utility model can also make the following improvements on the technical scheme:
further, a second valve cover is arranged in the first valve core, the second valve cover is in threaded connection with the valve body, and an axial hole Z is formed in the second valve cover; and a second valve core is arranged in the second valve cover, the second valve core is installed in the second valve cover through a second spring, and the end part of the second valve core and the valve body form a sealing surface. The oil return of the oil way is realized by arranging the second valve cover and the second valve core, and the pressure in the main oil way is prevented from increasing and impacting the oil return cavity of the main oil way.
Further, the orifice Y communicates with the axial hole Z.
Furthermore, the throttle hole Y is an inclined hole, so that the structural strength of the first valve core is better.
Furthermore, the end part of the second valve core and the sealing surface formed by the valve body are sealed by conical surfaces, so that the sealing effect is better.
Further, the balanced valve core assembly further comprises a balanced valve cover and a balanced spring, the balanced valve cover is in threaded connection with the valve body, and the main valve core is installed on the balanced valve cover through the balanced spring.
Drawings
FIG. 1 is a structural sectional view of a prior art balancing valve;
FIG. 2 is a cross-sectional view of the balanced valve of the present invention in the neutral position;
fig. 3 is a schematic diagram of the operation of the balanced valve of the present invention.
The reference numbers are recorded as follows: 101. a balance valve body; 102. a balanced valve core; 103. a one-way valve cover; 104. a one-way valve core; 1. a valve body; 2. a main valve element; 3. a first valve cover; 4. a first spring; 5. an O-shaped ring; 6. a first valve spool; 7. a second valve cover; 8. a second spring; 9. a second valve core; 10. a balance valve cover; 11. a balance spring; 01. an oil inlet 01; 02. an oil return port; 03. an oil inlet cavity; 04. an oil return cavity; 05. a balancing chamber; 06. a radial hole X; 07. an orifice Y; 08. an axial bore Z; 09. an orifice W.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the utility model.
As shown in fig. 2, a balance valve with a residual opening includes a valve body 1, a balance valve core assembly is arranged on the valve body 1, the balance valve core assembly includes a main valve core 2, a balance valve cover 10 and a balance spring 11, the balance valve cover 10 is screwed on the valve body 1, and the main valve core 2 is mounted on the balance valve cover 10 through the balance spring 11; an orifice W09 is provided in the main valve element 2.
An oil inlet 01 and an oil return port 02 are formed in the valve body 1; an oil inlet cavity 03, an oil return cavity 04 and a balance cavity 05 are arranged in the valve body 1; the oil inlet 01 and the oil return port 02 are symmetrically arranged on two sides of the balance cavity 05, the oil inlet cavity 03 and the oil return cavity 04 are symmetrically arranged on two sides of the balance cavity 05, the oil inlet cavity 03 is communicated with a motor cylinder body, hydraulic oil is conveyed to the motor cylinder body to push the motor to rotate, and the throttling hole W09 is communicated with the oil inlet cavity 03 and the oil return cavity 04 when the main valve element 2 is in a middle position; two groups of check valve assemblies are symmetrically arranged in the valve body 1, and are respectively arranged on two sides of the balance cavity 05; the check valve assembly comprises a first valve cover 3, the first valve cover 3 is in threaded connection with the inside of the valve body 1 and is sealed through an O-shaped ring 5, a radial hole X06 is formed in the first valve cover 3, the radial hole X06 is communicated with the oil inlet cavity 03 or the oil return cavity 04, namely when the radial hole X06 of the first valve cover 3 of the check valve assembly on one side is communicated with the oil inlet cavity 03, the radial hole X06 of the first valve cover 3 of the check valve assembly on the other side is communicated with the oil return cavity 04; a first valve core 6 is arranged in the first valve cover 3, the first valve core 6 is installed in the first valve cover 3 through a first spring 4, an orifice Y07 is arranged on the first valve core 6, the orifice Y07 is an inclined hole, and the orifice Y07 is communicated with the radial hole X06;
a second valve cover 7 is arranged in the first valve core 6, the second valve cover 7 is in threaded connection with the valve body 1, an axial hole Z08 is formed in the second valve cover 7, the axial hole Z08 is communicated with the oil inlet 01 or the oil return opening 02 of the valve body 1, namely when the axial hole Z08 of the second valve cover 7 of one-way valve assembly on one side is communicated with the oil inlet 01, the axial hole Z08 of the second valve cover 7 of the one-way valve assembly on the other side is communicated with the oil return opening 02; the throttle hole Y07 is communicated with the axial hole Z08, namely, the throttle hole Y07 is communicated with the radial hole X06 and the axial hole Z08. A second valve core 9 is arranged in the second valve cover 7, the second valve core 9 is installed in the second valve cover 7 through a second spring 8, the end part of the second valve core 9 and the valve body 1 form a conical sealing surface, and the balance cavity 05 is arranged between two sealing surfaces formed by the two second valve cores 9 and the valve body 1.
As shown in fig. 3, the working principle of the present invention is:
when the walking motor normally walks, hydraulic oil enters the oil inlet 01 of the valve body 1 and returns to the oil return port 02. When hydraulic oil enters the oil inlet 01, the main valve element 2 of the balance valve component is reversed, after the hydraulic oil enters from the oil inlet 01, the hydraulic oil passes through the axial hole Z08 of the second valve cover 7 of the left one-way valve component and overcomes the spring force of the first spring 4 of the left one-way valve component, the first valve element 6 of the left one-way valve component is pushed open, the first valve cover 3 of the left one-way valve component is communicated with the axial hole Z08, the hydraulic oil passes through the radial hole X06 of the first valve cover 3 of the left one-way valve component and reaches the oil inlet cavity 03 of the valve body 1, the oil inlet cavity 03 is communicated with the motor cylinder body, the high-pressure hydraulic oil pushes the motor to rotate, then the hydraulic oil reaches the oil return cavity 04, at the moment, because the balance valve element component is reversed when the high-pressure oil enters the main oil path, the oil return cavity 04 is connected with the balance cavity 05, the hydraulic oil passes through the oil return cavity 04 and reaches the balance cavity 05, the hydraulic oil of the balance cavity 05 overcomes the spring force of the second spring 8 of the right one-way valve component, the second valve core 9 of the right one-way valve component is pushed open to reach the oil return port 02, and the oil return port 02 is connected with the oil tank to form a loop to complete the working cycle.
When the walking motor stops, the main oil path is cut off, the main valve element 2 returns to the middle position, and each component of the one-way valve assembly returns to the position, and is in the middle position state as shown in fig. 2, at the moment, the main oil path stops supplying oil, the walking motor still has the influence of the rotation trend, the oil return cavity has the trend of the rise of the impact pressure, the oil inlet cavity has the trend of the air suction, and the pressure of the oil inlet cavity and the oil return cavity rapidly enters the balance state because the oil inlet cavity and the oil return cavity are connected and communicated through the throttle hole W09 of the main valve element 2; similarly, the impact high pressure of the oil return port 02 and the suction tendency of the oil inlet 01 are respectively communicated with the oil inlet cavity 03 and the oil return cavity 04 through the throttling hole Y07 and then are released through the throttling hole W09 of the main valve element 2. Like this, oil inlet 01, oil return port 02, oil feed chamber 03, oil return chamber 04 all couple together through the orifice, can reach pressure balance fast, have prevented the impact and the suction phenomenon of hydraulic pressure oil circuit simultaneously.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (6)
1. A balance valve with a residual opening comprises a valve body, wherein a balance valve core assembly is arranged on the valve body, and the balance valve is characterized in that an oil inlet and an oil return opening are formed in the valve body; an oil inlet cavity, an oil return cavity and a balance cavity are arranged in the valve body, the oil inlet and the oil return port are respectively arranged on two sides of the balance cavity, and the oil inlet cavity and the oil return cavity are respectively arranged on two sides of the balance cavity; two groups of check valve assemblies are symmetrically arranged in the valve body and are respectively arranged on two sides of the balance cavity; the check valve assembly comprises a first valve cover, the first valve cover is in threaded connection with the inside of the valve body, and a radial hole X is formed in the first valve cover; a first valve core is arranged in the first valve cover, the first valve core is installed in the first valve cover through a first spring, a throttling hole Y is formed in the first valve core, and the throttling hole Y is communicated with the radial hole X; the balance valve core assembly comprises a main valve core, and a throttling hole W is formed in the main valve core.
2. The balance valve with the residual opening as claimed in claim 1, wherein a second valve cover is arranged in the first valve core, the second valve cover is in threaded connection with the valve body, and an axial hole Z is formed in the second valve cover; and a second valve core is arranged in the second valve cover, the second valve core is installed in the second valve cover through a second spring, and the end part of the second valve core and the valve body form a sealing surface.
3. The balanced valve with residual opening according to claim 2, characterized in that the orifice hole Y communicates with the axial hole Z.
4. The balanced valve with residual opening according to claim 3, characterized in that the throttle hole Y is a slanted hole.
5. The balanced valve with residual openings of claim 2, characterized in that the end of the second spool forms a conical seal with the sealing surface of the valve body.
6. The balanced valve with residual openings of claim 1, characterized in that the balanced spool assembly further comprises a balanced bonnet and a balanced spring, the balanced bonnet is screwed on the valve body, and the main spool is mounted on the balanced bonnet through the balanced spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123457234.3U CN216447222U (en) | 2021-12-30 | 2021-12-30 | Balance valve with residual opening |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123457234.3U CN216447222U (en) | 2021-12-30 | 2021-12-30 | Balance valve with residual opening |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216447222U true CN216447222U (en) | 2022-05-06 |
Family
ID=81377627
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123457234.3U Active CN216447222U (en) | 2021-12-30 | 2021-12-30 | Balance valve with residual opening |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216447222U (en) |
-
2021
- 2021-12-30 CN CN202123457234.3U patent/CN216447222U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201633714U (en) | Novel brake master cylinder assembly for car | |
| CN102444733A (en) | Self-buffering multistage safety valve | |
| CN113074155A (en) | Negative pressure opening plug-in mounting type oil replenishing valve | |
| CN216447222U (en) | Balance valve with residual opening | |
| JPH01295083A (en) | Pressure limiting valve | |
| CN102777438A (en) | Multifunctional integrated valve bank of hydraulic motor | |
| CN206159579U (en) | Pilot -operated type relief valve | |
| CN207033628U (en) | Single cylinder diesel electronic controlled fuel pump enters oil outlet one-way valve | |
| CN215058588U (en) | Built-in buffer device of hydraulic actuator cylinder piston | |
| CN203094046U (en) | Forklift and agricultural machinery brake pumps | |
| CN205349688U (en) | Hydrostatic transmission's four groove valve plates | |
| CN201071804Y (en) | Low pressure balancing type three screw rod pump | |
| CN207920841U (en) | A kind of fluid end of reversed suction self-balance type booster pump | |
| CN213331755U (en) | Oil way block assembly and hydraulic power equipment | |
| CN219622973U (en) | Variable motor pressure control valve | |
| CN216361078U (en) | Anti-suction system of hydraulic motor | |
| CN220101871U (en) | Residual valve optimizing structure of long-service-life brake master cylinder | |
| CN219974981U (en) | Oil way with anti-suction effect | |
| CN220850500U (en) | Quick braking device of mining monorail crane | |
| CN220248517U (en) | Two-stage oil return backpressure structure | |
| CN212106421U (en) | Hydraulic control valve and balance cylinder oil compensating valve group | |
| CN111895020A (en) | Hydraulic damper with external leakage service prevention function | |
| CN212202685U (en) | External control type counter valve | |
| JP2575302B2 (en) | All-hydraulic power steering | |
| CN217481650U (en) | Middle cylinder part of hydraulic breaking hammer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |