CN210919614U - Operating valve for increasing aperture of damping hole - Google Patents
Operating valve for increasing aperture of damping hole Download PDFInfo
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- CN210919614U CN210919614U CN201921638528.6U CN201921638528U CN210919614U CN 210919614 U CN210919614 U CN 210919614U CN 201921638528 U CN201921638528 U CN 201921638528U CN 210919614 U CN210919614 U CN 210919614U
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- valve
- damping hole
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- main oil
- overload
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Abstract
The utility model discloses an operating valve in increase damping hole aperture belongs to the operating valve field, and the operating valve in increase damping hole aperture is including operating the valve body and setting up in inside decompression buffer, main oil circuit, the damping hole of operating the valve body, and the main oil circuit is linked together through damping hole and decompression buffer's balanced buffering valve pocket, and the aperture of damping hole is 1.3mm-1.5mm, is provided with the throat portion on the main oil circuit, and the passageway width of throat portion is less than the passageway width of main oil circuit. The utility model discloses an operating valve in increase damping hole aperture can realize preventing that the damping hole from being blockked up to can ensure to build the pressure time, thereby improve operating valve's stability and security.
Description
Technical Field
The utility model relates to an operating valve field especially relates to an operating valve in increase damping hole aperture.
Background
The ZL40/50 loader gear box which is widely used in China currently uses a fixed shaft type mechanical-hydraulic shifting gear operating valve. For example, the chinese patent publication No. CN201772053U discloses a variable speed control valve with a structure for blocking oil leakage at a joint surface, which includes a valve body, a variable speed gear shifting device, a braking device, and a pressure reducing buffer device, which are disposed on the valve body, the variable speed gear shifting device, the braking device, and the pressure reducing buffer device are communicated with each other through a main oil path, an oil return chamber is disposed in the valve body, an anti-seepage low-pressure oil groove is disposed on the valve body at the periphery of the main oil path, and the anti-seepage low.
In the existing operating valve, a main oil way is communicated with a balance buffer valve cavity of a decompression buffer device through a damping hole, and oil in the main oil way enters the balance buffer valve cavity to push a sliding block of the decompression buffer device to build pressure. For example, CN201772053U discloses a variable speed control valve with a structure for blocking oil leakage at a joint surface, which describes that a pressure reducing oil hole is formed in a valve body at a balanced buffer valve cavity, a one-way valve oil passing piece is arranged between the pressure reducing oil hole and a main oil path, a second steel ball is arranged on a passage between the one-way valve oil passing piece and the pressure reducing oil hole, an oil saving nozzle is further arranged on the valve body at the balanced buffer valve cavity, an oil saving hole (namely a damping hole) is formed in the oil saving nozzle, an energy storage slider is communicated in the oil saving hole, the main oil path and the balanced buffer valve cavity are communicated outside, a dredging needle valve is arranged at the oil saving hole, the dredging needle valve at the oil saving nozzle can freely float up and down in the oil saving hole, the hidden trouble that the oil saving hole is blocked by foreign matters such as oil product coking. The dredging needle valve at the oil saving nozzle has obvious improved effect on the gear shifting impact of the gearbox, when the speed change control valve is boosted after gear shifting, the one-way valve is closed, oil is fed through the oil saving hole of the oil saving nozzle, so that high pressure is formed between the energy storage sliding block and the screw plug to push the energy storage sliding block to move left and keep balance with the pressure reducing valve, the main oil pressure is set in a set pressure range, when the speed change control valve is shifted to release pressure, the one-way valve is rapidly opened, the high pressure between the energy storage sliding block and the screw plug disappears, the energy storage sliding block moves right, after the pressure reducing valve loses balance, the main oil pressure is rapidly reduced from the set 1.1-1.5 Mpa to 0.3-0.5 Mpa, after gear shifting, the main oil pressure is rapidly recovered to the set pressure, and the pressure reduction and boosting time in the gear.
However, the existing operating valve has a small aperture of the damping hole (if the aperture is large, oil filling is rapid, impact is large), usually 1mm, because of the cyclic use of oil in the operating valve, the oil contains many impurities, and after the operating valve is used for a certain period, the impurities inevitably block the damping hole, so that the oil pressure in the operating valve continuously rises, even burst occurs, and the service life and safety performance of the operating valve are seriously affected. Even in the pilot valve disclosed in CN201772053U, the orifice (i.e., the damping orifice) is still prone to be blocked after the pilot valve is used.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model aims to solve the technical problem of providing an operating valve with an increased damping hole aperture to prevent the damping hole from being blocked, thereby improving the stability and the safety of the operating valve.
The utility model adopts the technical proposal that:
the utility model provides a pair of increase damping hole aperture's operating valve, including operating the valve body with set up in operating inside decompression buffer, main oil circuit, the damping hole of valve body, the main oil circuit passes through the damping hole with decompression buffer's balanced buffer valve pocket is linked together, the aperture of damping hole is 1.3mm to 1.5mm, be provided with the throat portion on the main oil circuit, the channel width of throat portion is less than the channel width of main oil circuit.
As a further improvement of the present solution, the necking portion is located at a section of the main oil path close to the damping hole.
As a further improvement of the scheme, the hydraulic control valve further comprises a braking device arranged inside the control valve body, a circular throttling hole is arranged on the main oil path, and the main oil path is communicated with the braking device through the circular throttling hole.
As a further improvement of the scheme, the hydraulic control valve further comprises an oil return cavity, and a buffer through hole communicated with the main oil way and the oil return cavity is formed in the control valve body.
As a further improvement of the scheme, the overload valve is further included, an overload valve cavity is arranged on the control valve body and communicated with the main oil way through an oil inlet, the overload valve cavity is communicated with an oil return cavity of the control valve body through an oil outlet, and the overload valve is arranged inside the overload valve cavity.
As a further improvement of the present solution, the overload valve includes a plug screw, a spring, and a steel ball, the plug screw is sealed and disposed at an outer port of the overload valve chamber, the spring and the steel ball are both disposed inside the overload valve chamber, the spring is used for abutting the steel ball against a smaller end of the inner side of the overload valve chamber, the smaller end of the inner side of the overload valve chamber is communicated with the main oil passage through the oil inlet, and the oil outlet is located between the steel ball and the plug screw.
As a further improvement of the scheme, the overload valve further comprises an O-shaped sealing ring, and the O-shaped sealing ring is arranged between the screw plug and the wall of the overload valve cavity.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model provides a pair of increase damping hole aperture's operating valve, set up to 1.3mm to 1.5mm through the aperture with the damping hole, 1.3 to 1.5 times for the damping hole of current operating valve, the aperture of damping hole has been increased and effectively prevent that it from being blockked up by the impurity in the fluid, and simultaneously, set up the throat portion on main oil way, the channel width who makes the throat portion is less than the channel width of main oil way, reduce fluid promptly and pass through flow and speed, offset with the oil filling speed grow that leads to because of the aperture enlargement of damping hole, do not influence former oil filling time, build the pressure time and still can obtain the guarantee, can prevent effectively again that the damping hole from being blockked up.
Drawings
Fig. 1 is a schematic cross-sectional structural view of an operating valve for increasing the aperture of a damping hole according to an embodiment of the present invention;
fig. 2 is a schematic structural view of an operating valve body provided in an embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view A-A of FIG. 2 according to an embodiment of the present invention;
fig. 4 is a schematic sectional view of B-B in fig. 2 according to an embodiment of the present invention.
In the figure:
1. operating the valve body; 11. a decompression buffer device; 110. a balance buffer valve cavity; 10. a main oil path; 12. a damping hole; 101. shrinking the neck part; 13. a braking device; 14. a circular orifice; 15. an oil return cavity; 19. a buffer through hole; 2. an overload valve; 16. an overload valve cavity; 17. an oil inlet; 18. an oil outlet; 21. a plug screw; 22. a spring; 23. a steel ball; 24. an O-shaped sealing ring.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings and technical solutions needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
The present invention will be further explained with reference to the accompanying drawings.
As shown in fig. 1 to 4, the pilot valve for increasing the aperture of the damping hole provided in this embodiment includes a pilot valve body 1, and a decompression buffering device 11, a main oil path 10, and a damping hole 12 which are disposed inside the pilot valve body 1, wherein the main oil path 10 is communicated with a balanced buffering valve cavity 110 of the decompression buffering device 11 through the damping hole 12, the aperture of the damping hole 12 is 1.3mm to 1.5mm, a necking portion 101 is disposed on the main oil path 10, and the channel width of the necking portion 101 is smaller than the channel width of the main oil path 10. The aperture through with damping hole 12 sets up to 1.3mm to 1.5mm, 1.3 to 1.5 times for the damping hole of current operating valve, the aperture of damping hole 12 has been increased and effectively prevented it by the impurity jam in the fluid, simultaneously, set up throat 101 on main oil circuit 10, the channel width that makes throat 101 is less than the channel width of main oil circuit 10, reduce fluid promptly and pass through flow and speed, offset with the oil filling speed grow that leads to because of the aperture expansion of damping hole 12, do not influence former oil filling time, build the pressure time and still can obtain the guarantee, can effectively prevent again that damping hole 12 from blockking up. Specifically, in this embodiment, the aperture of the damping hole 12 is preferably 1.3mm, which can prevent the damping hole 12 from being blocked and ensure the pressure build-up time.
The structure of the main oil path 10 and the structure of the pressure reducing buffer device 11 are mature prior art, the pressure reducing buffer device 11 generally includes a balance buffer valve cavity 110, a pressure reducing valve cavity, a pressure reducing valve rod, an energy storage slider and a spring, the balance buffer valve cavity 110 is disposed on the control valve body 1, the pressure reducing valve cavity, the pressure reducing valve rod is disposed in the pressure reducing valve cavity, the energy storage slider is disposed in the balance buffer valve cavity 110, and the spring is disposed between the energy storage slider and the pressure reducing valve rod, which is a conventional technology of the control valve, and reference may be made to a variable speed control valve of a structure for blocking oil leakage at a joint surface disclosed in chinese patent publication No. CN201772053U, a gear shifting buffer multifunctional.
Specifically, the necking part 101 is located at a section, close to the damping hole 12, of the main oil path 10, so that the throttling part 101 throttles the flow, the flow enters the balance buffer valve cavity 110 through the damping hole 12 to build pressure, the flow speed is directly slowed down in a short distance, and impurities in oil are prevented from impacting the damping hole 12 along with the oil.
In order to further slow down the oil filling time, the operating valve for increasing the aperture of the damping hole further comprises a braking device 13 arranged inside the operating valve body 1, a circular throttling hole 14 is arranged on the main oil path 10, and the main oil path 10 is communicated with the braking device 13 through the circular throttling hole 14. In the conventional control valve, the main oil passage 10 is communicated with the braking device 13 through the kidney-shaped hole, and the flow rate is large, but the circular throttle hole 14 is adopted in the embodiment, so that the flow rate can be reduced, the flow rate is increased due to the increase of the aperture of the damping hole 12, and the flow rate is shared with the necking part 101, and the channel width at the necking part 101 does not need to be too small. The brake device 13 is conventional in the prior art of the pilot valve.
Furthermore, the control valve for increasing the aperture of the damping hole further comprises an oil return cavity 15, and a buffer through hole 19 for communicating the main oil path 10 with the oil return cavity 15 is arranged on the control valve body 1. When the pressure is built up, part of oil in the main oil way 10 can enter the oil return cavity 15 through the buffer through hole 19, so that the oil filling time is reduced, the flow rate is accelerated due to the increase of the aperture of the damping hole 12 when the oil is further shared with the circular throttling hole 14 and the necking part 101, and the pressure building time is further prolonged.
In order to improve the safety performance of the operating valve for increasing the aperture of the damping hole, the operating valve for increasing the aperture of the damping hole further comprises an overload valve 2, an overload valve cavity 16 is arranged on the operating valve body 1, the overload valve cavity 16 is communicated with the main oil way 10 through an oil inlet 17, the overload valve cavity 16 is communicated with an oil return cavity 15 of the operating valve body 1 through an oil outlet 18, and the overload valve 2 is arranged inside the overload valve cavity 16.
Specifically, the overload valve 2 comprises a screw plug 21, a spring 22 and a steel ball 23, the screw plug 21 is in threaded sealing with an outer port of the overload valve cavity 16, the spring 22 and the steel ball 23 are both arranged inside the overload valve cavity 16, the spring 22 is located between the steel ball 23 and the screw plug 21, the spring 22 is used for enabling the steel ball 23 to be tightly abutted to a smaller end of the inner side of the overload valve cavity 16, the smaller end of the inner side of the overload valve cavity 16 is communicated with the main oil path 10 through an oil inlet 17, and the oil outlet 18 is located between the steel ball 23 and the screw plug 21. When the loader has a fault, the working oil pressure rises rapidly, the overloaded pressure oil in the main oil path 10 pushes open the steel ball 23 through the oil inlet 17 and enters the overload valve cavity 16, and is discharged into the oil return cavity 15 through the oil outlet 18, and after the pressure is recovered to be normal, the steel ball 23 returns under the action of the spring 22 to plug the overload valve cavity 16.
In order to improve the sealing effect of the overload valve cavity 16, further, the overload valve 2 further comprises an O-ring 24, and the O-ring 24 is arranged between the plug screw 21 and the cavity wall of the overload valve cavity 16 to prevent pressure oil from leaking.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that are not thought of through the creative work should be covered within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope defined by the claims.
Claims (7)
1. The operating valve for increasing the aperture of the damping hole comprises an operating valve body (1), and a decompression buffering device (11), a main oil way (10) and the damping hole (12) which are arranged inside the operating valve body (1), wherein the main oil way (10) is communicated with a balance buffering valve cavity (110) of the decompression buffering device (11) through the damping hole (12), and the operating valve is characterized in that:
the aperture of the damping hole (12) is 1.3mm to 1.5 mm;
the main oil way (10) is provided with a necking part (101), and the channel width of the necking part (101) is smaller than that of the main oil way (10).
2. The pilot valve for increasing the orifice diameter of the orifice of claim 1, wherein:
the necking part (101) is located on a section, close to the damping hole (12), of the main oil way (10).
3. The pilot valve for increasing the orifice diameter of the orifice of claim 1, wherein:
the brake device (13) is arranged inside the operating valve body (1);
a circular throttling hole (14) is formed in the main oil way (10);
the main oil passage (10) is communicated with the braking device (13) through the circular throttling hole (14).
4. The pilot valve for increasing the orifice diameter of the orifice of claim 1, wherein:
the oil return device also comprises an oil return cavity (15);
and a buffer through hole (19) for communicating the main oil way (10) with the oil return cavity (15) is formed in the operating valve body (1).
5. The pilot valve for increasing the orifice diameter of the orifice of claim 1, wherein:
also comprises an overload valve (2);
an overload valve cavity (16) is arranged on the operating valve body (1), the overload valve cavity (16) is communicated with the main oil way (10) through an oil inlet (17), and the overload valve cavity (16) is communicated with an oil return cavity (15) of the operating valve body (1) through an oil outlet (18);
the overload valve (2) is arranged inside the overload valve cavity (16).
6. The pilot valve for increasing the orifice diameter of the orifice according to claim 5, wherein:
the overload valve (2) comprises a screw plug (21), a spring (22) and a steel ball (23);
the screw plug (21) is sealed at the outer side port of the overload valve cavity (16);
the spring (22) and the steel ball (23) are both arranged inside the overload valve cavity (16);
the spring (22) is used for pressing the steel ball (23) against the smaller end of the inner side of the overload valve cavity (16);
the smaller end of the inner side of the overload valve cavity (16) is communicated with the main oil way (10) through the oil inlet (17);
the oil outlet (18) is positioned between the steel ball (23) and the screw plug (21).
7. The pilot valve for increasing the orifice diameter of the orifice of claim 6, wherein:
the overload valve (2) further comprises an O-shaped sealing ring (24);
the O-shaped sealing ring (24) is arranged between the screw plug (21) and the cavity wall of the overload valve cavity (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921638528.6U CN210919614U (en) | 2019-09-27 | 2019-09-27 | Operating valve for increasing aperture of damping hole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921638528.6U CN210919614U (en) | 2019-09-27 | 2019-09-27 | Operating valve for increasing aperture of damping hole |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210919614U true CN210919614U (en) | 2020-07-03 |
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ID=71366190
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921638528.6U Active CN210919614U (en) | 2019-09-27 | 2019-09-27 | Operating valve for increasing aperture of damping hole |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210919614U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112178176A (en) * | 2020-08-19 | 2021-01-05 | 江西液压件股份有限公司 | Variable speed operating valve and valve body thereof and variable speed gear shifting system with variable speed operating valve |
-
2019
- 2019-09-27 CN CN201921638528.6U patent/CN210919614U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112178176A (en) * | 2020-08-19 | 2021-01-05 | 江西液压件股份有限公司 | Variable speed operating valve and valve body thereof and variable speed gear shifting system with variable speed operating valve |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A Control Valve for Increasing the Diameter of Damping Hole Effective date of registration: 20221201 Granted publication date: 20200703 Pledgee: Jiangxi Bank Co.,Ltd. Ji'an Anfu Sub branch Pledgor: JIANGXI HYDRAULIC PIECES Ltd. Registration number: Y2022980024062 |