CN108278240B - Automatic adjusting damping valve - Google Patents
Automatic adjusting damping valve Download PDFInfo
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- CN108278240B CN108278240B CN201810067295.2A CN201810067295A CN108278240B CN 108278240 B CN108278240 B CN 108278240B CN 201810067295 A CN201810067295 A CN 201810067295A CN 108278240 B CN108278240 B CN 108278240B
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- hole
- valve
- oil port
- groove
- flow
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/0401—Valve members; Fluid interconnections therefor
- F15B13/0405—Valve members; Fluid interconnections therefor for seat valves, i.e. poppet valves
Abstract
The invention provides an automatic adjusting damping valve, which comprises: the valve body is provided with an oil port A, an oil port B and an installation cavity; the valve sleeve is inserted in the mounting cavity and is provided with a first through flow hole communicated with the oil port A; the pressure setting assembly is positioned at the upper part of the inner hole of the valve sleeve; the valve core is provided with a groove communicated with the first through-flow hole and a second through-flow hole communicated with the oil port B, a damper is arranged in the second through-flow hole, and the valve core is also provided with a conical surface for controlling whether the groove is communicated with the oil port B or not and a third through-flow hole for communicating the groove with the second through-flow hole. The automatic regulating damping valve can reduce the hysteresis influence of the opening of the controlled valve and does not influence the stability of the pilot control part of the controlled valve.
Description
Technical Field
The invention relates to the technical field of valves, in particular to an automatic adjusting damping valve.
Background
In modern mechanical equipment, such as construction machines, construction machines and the like, a large number of hydraulic load-bearing systems are used, wherein the balancing valve is a key hydraulic component of such systems. At present, a known balance valve mainly comprises a pilot control valve and a main valve, and in order to increase the damping of the balance valve and reduce the vibration when the load drops, a plurality of damping holes are generally arranged at the pilot control valve of the existing balance valve, for example, the design is the Chinese utility model patent with the patent number ZL 01139093.X and the name of "hydraulic balance valve". However, the pilot control valve provided with a plurality of damping holes has the following disadvantages: when the control load is reduced, because the damping is overlarge, the change of the pilot pressure passing through the damping hole lags behind the pressure of a main oil path of the actuator, the opening and the closing of the balance valve are delayed, the action of the actuator is lagged, the operation efficiency is influenced, and the lagged influence is more obvious particularly when the viscosity of hydraulic oil is higher (for example, an environment with lower temperature). The pressure of a main oil way is increased very high due to the action lag of an actuator, and a balance valve can be opened, so that a load cavity is pressurized, and on one hand, the pressure of a system is in a high-pressure condition, and the performance and the service life of a hydraulic element are seriously influenced; on the other hand, the load is accelerated and decreased at the moment when the balance valve is opened, and the speed is uncontrollable.
Disclosure of Invention
In view of some or all of the above technical problems in the prior art, the present invention provides an automatically adjusting damping valve, which can reduce the hysteresis effect of the opening of the controlled valve without affecting the stability of the pilot control part of the controlled valve.
To achieve the above object, in one aspect, the present invention provides an automatic adjusting damping valve having the following structure, including:
the valve body is provided with an oil port A, an oil port B and an installation cavity;
the valve sleeve is provided with an axial through hole and is inserted into the mounting cavity, and a first through hole communicated with the oil port A is formed in the valve sleeve;
a pressure setting assembly located at an upper portion of the valve housing bore;
the valve core is arranged in an inner hole of the valve sleeve in a sliding mode, the upper portion of the valve core abuts against the pressure setting assembly, a groove communicated with the first through hole and a second through hole communicated with the oil port B are formed in the valve core, a damper is arranged in the second through hole, a damping hole is formed in the damper, and a conical surface for controlling whether the groove is communicated with the oil port B or not and a third through hole for communicating the groove with the second through hole are further formed in the valve core;
when the pressure of the oil port B is lower than the acting force of the pressure setting assembly, the oil liquid of the oil port A can sequentially flow into the oil port B through the first through hole and the groove, and the oil liquid of the oil port A can also sequentially flow into the oil port B through the first through hole, the groove, the third through hole and the damping hole;
when the pressure of the oil port B reaches the acting force of the pressure setting assembly, the valve core moves upwards, the valve port of the valve sleeve is blocked by the conical surface, and oil of the oil port A can only flow into the oil port B through the first through-flow hole, the groove, the third through-flow hole, the second through-flow hole and the damping hole in sequence.
In one embodiment, the pressure setting assembly comprises a spring seat, an elastic member, an adjusting rod and a lock nut, the spring seat abuts against the upper end of the valve core, the adjusting rod is screwed on the valve sleeve, the elastic member is located between the spring seat and the adjusting rod, and the lock nut is in threaded connection with the adjusting rod.
In one embodiment, the flow area of the recess is greater than the flow area of the orifice.
Compared with the prior art, the automatic adjusting damping valve has the advantages that:
because a first flow channel consisting of the first through-flow hole and the valve core groove which are connected in parallel and a second flow channel consisting of the first through-flow hole, the groove, the third through-flow hole, the second through-flow hole and the damping hole are arranged between the oil port A and the oil port B, the flow areas of the first flow channel and the second flow channel are different. Taking the control of the balance valve as an example, pressure can be quickly established in a control piston cavity of the main valve in the balance valve after oil passes through the first flow passage, the dynamic response speed of the main valve is improved, and the influence of the opening delay of the balance valve is reduced. When the opening pressure of the main valve is reached, the first flow passage is closed, the hydraulic oil of the oil port A can only flow into the balance valve control piston cavity through the second flow passage, and then the damping of the system is increased, so that the balance valve can be quickly opened, and the vibration can be effectively inhibited.
Drawings
Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, in which:
FIG. 1 shows a schematic structural diagram of one embodiment of a self-adjusting damping valve of the present invention;
FIG. 2 is a schematic diagram showing the valve core of the automatically adjusting damping valve of the present invention closed;
FIG. 3 shows a hydraulic schematic of the self-adjusting damping valve of the present invention;
fig. 4 shows a hydraulic circuit diagram of a hydraulic system including the self-adjusting damping valve of the present invention.
In the drawings, like parts are provided with like reference numerals. The figures are not drawn to scale.
Detailed Description
In order to make the technical solutions and advantages of the present invention more apparent, exemplary embodiments of the present invention are described in further detail below with reference to the accompanying drawings. It is clear that the described embodiments are only a part of the embodiments of the invention, and not an exhaustive list of all embodiments. And the embodiments and features of the embodiments may be combined with each other without conflict.
The inventor notices in the course of invention that when the pilot control valve with several damping holes is used to control balance valve or other type of controlled valve, the lag of the controlled valve is obvious and the stability of the controlled valve is not high.
In view of the above disadvantages, an embodiment of the present invention provides an automatic adjusting damping valve, which is described below.
Fig. 1 shows one embodiment of the self-adjusting damping valve of the present invention. In this embodiment, the automatically adjusting damping valve of the present invention mainly includes:
the valve body 1 is provided with an oil port A, an oil port B and an installation cavity;
the valve sleeve 2 is provided with an axial through hole, the valve sleeve 2 is inserted in the installation cavity of the valve body 1, and the valve sleeve 2 is provided with a first through hole 2.1 communicated with the oil port A;
a pressure setting assembly located at an upper portion of the inner bore of the valve housing 2;
the valve core 4 is arranged in an inner hole of the valve sleeve 2 in a sliding mode, the upper portion of the valve core is abutted against the pressure setting assembly, a groove 4.1 communicated with the first through-flow hole 2.1 and a second through-flow hole 4.3 communicated with the oil port B are formed in the valve core 4, a damper 3 is installed in the second through-flow hole 4.3, a damping hole 3.1 is formed in the damper 3, and a conical surface 4.4 for controlling whether the groove 4.1 is communicated with the oil port B or not and a third through-flow hole 4.2 for communicating the groove 4.1 with the second through-flow hole 4.3 are further formed in the valve core 4;
when the pressure of the oil port B is lower than the acting force of the pressure setting assembly, oil of the oil port A can sequentially flow into the oil port B through the first through hole 2.1 and the groove 4.1, and the oil of the oil port A can also sequentially flow into the oil port B through the first through hole 2.1, the groove 4.1, the third through hole 4.2 and the damping hole 3.1;
when the pressure of the oil port B reaches the acting force of the pressure setting assembly, the valve core 4 moves upwards, the valve port of the valve sleeve 2 is blocked by the conical surface 4.4, and oil of the oil port A only flows into the oil port B through the first through flow hole 2.1, the groove 4.1, the third through flow hole 4.2, the second through flow hole 4.3 and the damping hole 3.1 in sequence.
In one embodiment, as shown in fig. 1, the pressure setting assembly includes a spring seat 7, an elastic member 8, an adjusting rod 9 and a lock nut 10, the spring seat 7 abuts against the upper end of the valve core 4, the adjusting rod 9 is screwed on the valve housing 2, the elastic member 8 is located between the spring seat 7 and the adjusting rod 9, and the lock nut 10 is screwed on the adjusting rod 9.
In one embodiment, the flow area of the recess 4.1 is larger than the flow area of the damping orifice 3.1.
As shown in fig. 4, it is a schematic diagram of the application of the automatic adjusting damping valve of the present invention in a hydraulic system, and the hydraulic system mainly includes: a hydraulic pressure source 11, a directional control valve 12, a hydraulic cylinder 14, a balance valve 13, and an automatic adjusting damping valve of the present invention connected to a control port of the balance valve 13. The self-adjusting damping valve may take the configuration as previously described.
The basic working principle of the hydraulic system is as follows: the oil from the hydraulic source 11 is partially introduced into the hydraulic cylinder 14 through the directional control valve 12, and the other part is introduced into the oil port a of the valve body 1 of the automatically adjusting damping valve of the present invention.
When the pressure of the control chamber of the balance valve 13 does not reach the set pressure of the pressure setting assembly of the present invention (the pressure is generally set as the opening pressure of the balance valve 13 in this pressure application), the oil in the oil port a can flow into the oil port B through the first through hole 2.1 and the groove 4.1 in sequence, and enter the controlled chamber of the balance valve 13 to quickly build up the pressure. After the pressure of the control cavity of the balance valve 13 reaches the set pressure, as shown in fig. 2, the conical surface 4.4 closes the valve port of the valve housing 2, and the oil in the oil port a flows into the oil port B through the first through-flow hole 2.1, the groove 4.1, the third through-flow hole 4.2, the second through-flow hole 4.3 and the damping hole 3.1 of the automatic adjusting damping valve, and smoothly enters the controlled cavity. So that not only the influence of the opening hysteresis of the balancing valve 13 can be reduced, but also the stability of the pilot control part of the controlled valve 13 is not affected.
When the hydraulic cylinder 14 begins to descend, the balance valve 13 can quickly respond under the action of the automatic adjusting damping valve, and the descending speed of the hydraulic cylinder 14 can be controlled in the descending process, so that the hydraulic cylinder 14 can descend slowly or descend at a basically uniform speed. When the hydraulic cylinder 14 needs to stop, the pressure of the port A is rapidly reduced, the pressure of the port B firstly flows into the port A through the damping hole 3.1, the balance valve 13 is slowly closed, once the pressure of the port B is lower than the acting force of the pressure setting assembly, the conical surface 4.4 is opened, oil rapidly flows into the port A of the automatic adjusting damping valve through the port B and the groove 4.1 from the control cavity of the balance valve 13, and the balance valve 13 can be rapidly closed.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, the appended claims are intended to be construed to include preferred embodiments and all such changes and/or modifications as fall within the scope of the invention, and all such changes and/or modifications as are made to the embodiments of the present invention are intended to be covered by the scope of the invention.
Claims (2)
1. An automatically adjusting damping valve, comprising:
the valve body is provided with an oil port A, an oil port B and an installation cavity;
the valve sleeve is provided with an axial through hole and is inserted into the mounting cavity, and a first through hole communicated with the oil port A is formed in the valve sleeve;
a pressure setting assembly located at an upper portion of the axial through hole;
the valve core is arranged in the axial through hole in a sliding mode, the upper portion of the valve core abuts against the pressure setting assembly, a groove communicated with the first through hole and a second through hole communicated with the oil port B are formed in the valve core, a damper is installed in the second through hole, a damping hole is formed in the damper, a conical surface for controlling whether the groove is communicated with the oil port B or not and a third through hole for communicating the groove with the second through hole are further formed in the valve core, and the flow area of the groove is larger than that of the damping hole;
when the pressure of the oil port B is lower than the acting force of the pressure setting assembly, the oil liquid of the oil port A can sequentially flow into the oil port B through the first through hole and the groove, and the oil liquid of the oil port A can also sequentially flow into the oil port B through the first through hole, the groove, the third through hole and the damping hole;
when the pressure of the oil port B reaches the acting force of the pressure setting assembly, the valve core moves upwards, the valve port of the valve sleeve is blocked by the conical surface, and oil of the oil port A can only flow into the oil port B through the first through-flow hole, the groove, the third through-flow hole, the second through-flow hole and the damping hole in sequence.
2. The automatically adjusting damping valve of claim 1, wherein the pressure setting assembly comprises a spring seat, an elastic member, an adjusting rod and a lock nut, the spring seat abuts against the upper end of the valve core, the adjusting rod is screwed on the valve sleeve, the elastic member is located between the spring seat and the adjusting rod, and the lock nut is screwed on the adjusting rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810067295.2A CN108278240B (en) | 2018-01-24 | 2018-01-24 | Automatic adjusting damping valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810067295.2A CN108278240B (en) | 2018-01-24 | 2018-01-24 | Automatic adjusting damping valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108278240A CN108278240A (en) | 2018-07-13 |
| CN108278240B true CN108278240B (en) | 2020-01-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810067295.2A Active CN108278240B (en) | 2018-01-24 | 2018-01-24 | Automatic adjusting damping valve |
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| Country | Link |
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| CN (1) | CN108278240B (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5570721A (en) * | 1995-03-29 | 1996-11-05 | Caterpillar Inc. | Double acting solenoid and poppet valve servomechanism |
| DE19945183A1 (en) * | 1999-09-21 | 2001-03-22 | Mannesmann Rexroth Ag | Seat valve |
| DE10324051A1 (en) * | 2003-05-27 | 2004-12-16 | Bosch Rexroth Ag | Pressure reducing valve |
| CN203809759U (en) * | 2014-04-25 | 2014-09-03 | 徐工集团工程机械股份有限公司 | Back pressure valve |
| CN106015152B (en) * | 2016-07-19 | 2017-11-10 | 盐城海特机械科技有限公司 | Slowly the flow type balanced valve closed is changed up |
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2018
- 2018-01-24 CN CN201810067295.2A patent/CN108278240B/en active Active
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| CN108278240A (en) | 2018-07-13 |
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Effective date of registration: 20191216 Address after: 325000 Linlong village, Oubei street, Yongjia County, Wenzhou City, Zhejiang Province (within Wenzhou Yuquan pump valve manufacturing Co., Ltd.) Applicant after: Zhejiang Mingyi Valve Technology Co., Ltd Address before: Zhenhai District in Zhejiang province 315200 Ningbo Jiaochuan streets Yinfeng Xiaoyue No. 30 building 501 room Applicant before: Chen Yanyan |
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