CN108266415B - Automatic control variable damping valve - Google Patents
Automatic control variable damping valve Download PDFInfo
- Publication number
- CN108266415B CN108266415B CN201810067195.XA CN201810067195A CN108266415B CN 108266415 B CN108266415 B CN 108266415B CN 201810067195 A CN201810067195 A CN 201810067195A CN 108266415 B CN108266415 B CN 108266415B
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- Prior art keywords
- valve
- hole
- flow
- oil port
- oil
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- 238000013016 damping Methods 0.000 title claims abstract description 33
- 238000009434 installation Methods 0.000 claims abstract description 5
- 230000000694 effects Effects 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 4
- 239000003921 oil Substances 0.000 description 41
- 239000012530 fluid Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 239000010720 hydraulic oil Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
Images
Classifications
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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
-
- 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
- F15B13/022—Flow-dividers; Priority valves
-
- 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
- F15B13/042—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure
- F15B13/0426—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure with fluid-operated pilot valves, i.e. multiple stage valves
Abstract
The present invention provides an automatically controlled variable 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 inserted in the mounting cavity and is provided with a first through flow hole communicated with the oil port A and a through flow groove communicated with the first through flow hole; the pressure setting assembly is positioned at the upper part of the inner hole of the valve sleeve; the valve core is arranged in the inner hole of the valve sleeve in a sliding mode, an overflowing gap is formed between the valve core and the inner hole part of the valve sleeve, a second through hole is formed in the valve core, a third through hole for communicating the second through hole with the oil port B is further formed in the valve core, and the valve core can control whether the second through hole is communicated with the through hole or not by sliding up and down along the inner hole of the valve sleeve. The automatic control variable 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 control variable 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 controlled variable 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, a first through hole communicated with the oil port A is formed in the valve sleeve, and a through groove communicated with the first through hole is further 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 the inner hole of the valve sleeve in a sliding mode, an overflowing gap is formed between the valve core and the inner hole part of the valve sleeve, the upper portion of the valve core abuts against the pressure setting assembly, a second through-flow hole along the radial direction is formed in the valve core, a third through-flow hole for communicating the second through-flow hole with the oil port B is further formed in the valve core, and the valve core can slide up and down along the inner hole of the valve sleeve to control whether the second through-flow hole is communicated with the through-flow groove or not;
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, the through groove, the second through hole and the third through hole, and the oil liquid of the oil port A can also sequentially flow into the oil port B through the first through hole, the through groove and the through gap;
when hydraulic fluid port B pressure reaches the effort of pressure setting subassembly, case rebound, lead to the groove with the second through-flow hole cuts off not logical, and hydraulic fluid port A's fluid can only flow into hydraulic fluid port B through first through-flow hole, through the groove, the clearance of overflowing in proper order.
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 damping effect of the flow passage gap is greater than the damping effect of the second flow passage opening.
Compared with the prior art, the automatic adjusting damping valve has the advantages that:
the damping effect of the first flow channel and the second flow channel is different because the first flow channel, the second flow channel and the second flow channel are arranged between the oil port A and the oil port B, the first flow channel, the second flow channel and the third flow channel are formed by the first flow hole, the flow channel, the second flow hole and the third flow hole which are connected in parallel and are sequentially communicated. 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 the present invention;
FIG. 2 shows a schematic of the valve cartridge of the present invention in a closed configuration;
FIG. 3 shows a hydraulic schematic of the present invention;
fig. 4 shows a hydraulic circuit diagram of a hydraulic system incorporating 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 automatically controlled variable damping valve, which will be 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, a first through flow hole 2.1 communicated with the oil port A is formed in the valve sleeve 2, and a through flow groove 2.2 communicated with the first through flow hole 2.1 is further formed in the valve sleeve 2;
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, a flow passage gap 4.3 is formed between the valve core 4 and the inner hole of the valve sleeve 2, the upper portion of the valve core 4 abuts against the pressure setting assembly, a second through-flow hole 4.1 in the radial direction is formed in the valve core 4, a third through-flow hole 4.2 communicating the second through-flow hole 4.1 with the oil port B is further formed in the valve core 4, and the valve core 4 can control whether the second through-flow hole 4.1 is communicated with the through-flow groove 2.2 or not by sliding up and down along;
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, the through flow groove 2.2, the second through hole 4.1 and the third through hole 4.2, 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 through flow groove 2.2 and the through flow gap 4.3;
when the pressure of the oil port B reaches the acting force of the pressure setting assembly, the valve core 4 moves upwards, the through-flow groove 2.2 is isolated from the second through-flow hole 4.1 and is not communicated with the second through-flow hole, and oil of the oil port A can only flow into the oil port B through the first through-flow hole 2.1, the through-flow groove 2.2 and the through-flow gap 4.3 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 damping effect of the flow passage gap 4.3 is greater than the damping effect of the second throughflow opening 4.1
As shown in fig. 4, it is a schematic diagram of the application of the automatic control variable 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 control variable damping valve of the present invention connected to a control port of the balance valve 13. The automatically controlled variable damping valve adopts the structure as described above.
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-flow hole 2.1, the through-flow groove 2.2, the second through-flow hole 4.1 and the third through-flow hole 4.2 in sequence, and then enter the controlled chamber of the balance valve 13 to quickly establish the pressure. After the pressure of the control cavity of the balance valve 13 reaches the set pressure, as shown in fig. 2, the second through-flow hole 4.1 is blocked from the through-flow groove 2.2, and the oil from the oil port a flows into the oil port B through the first through-flow hole 2.1, the through-flow groove 2.2 and the through-flow gap 4.3, which only can pass through the automatic control variable 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 flow passage gap 4.3, the balance valve 13 starts to be closed slowly, once the pressure of the port B is lower than the acting force of the pressure setting assembly, the second through-flow hole 4.1 is communicated with the through-flow groove 2.2, oil rapidly flows into the port A of the automatic control variable damping valve through the port B, the third through-flow hole 4.2, the second through-flow hole 4.1, the through-flow groove 2.2 and the first through-flow hole 2.1 by a control cavity of the balance valve 13, and the balance valve 13 can be closed rapidly.
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 controlled variable 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, a first through hole communicated with the oil port A is formed in the valve sleeve, and a through groove communicated with the first through hole is further 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 the inner hole of the valve sleeve in a sliding mode, an overflowing gap is formed between the valve core and the inner hole part of the valve sleeve, the upper portion of the valve core abuts against the pressure setting assembly, a second through-flow hole along the radial direction is formed in the valve core, a third through-flow hole which is communicated with the second through-flow hole and the oil port B is further formed in the valve core, the valve core can control whether the second through-flow hole is communicated with the through-flow groove or not by sliding up and down along the inner hole of the valve sleeve, and the damping effect of the overflowing gap is larger than that of;
the oil port B is communicated with a control port of the balance valve, the oil port A is communicated with control oil for controlling the opening of the balance valve, and the set pressure of the pressure setting assembly is equal to the opening pressure of the balance valve; when the pressure of the oil port B is lower than the set pressure 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, the through groove, the second through hole and the third through hole, and the oil liquid of the oil port A can also sequentially flow into the oil port B through the first through hole, the through groove and the through gap; when the pressure of the oil port B reaches the set pressure of the pressure setting assembly, the valve core moves upwards, the through flow groove is isolated from the second through flow hole, and oil of the oil port A can only flow into the oil port B through the first through flow hole, the through flow groove and the through flow gap in sequence;
when the pressure of the oil port A is rapidly reduced, oil of the oil port B flows into the oil port A through the flow gap, the balance valve is slowly closed, when the pressure of the oil port B is lower than the set pressure of the pressure setting assembly, the valve core moves downwards, the second through-flow hole is communicated with the through-flow groove, the oil of the balance valve control opening rapidly flows into the oil port A through the oil port B, the third through-flow hole, the second through-flow hole, the through-flow groove and the first through-flow hole, and the balance valve is rapidly closed.
2. The automatically controlled variable damping valve according to 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 |
|---|---|---|---|
| CN201810067195.XA CN108266415B (en) | 2018-01-24 | 2018-01-24 | Automatic control variable damping valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810067195.XA CN108266415B (en) | 2018-01-24 | 2018-01-24 | Automatic control variable damping valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108266415A CN108266415A (en) | 2018-07-10 |
| CN108266415B true CN108266415B (en) | 2020-07-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810067195.XA Active CN108266415B (en) | 2018-01-24 | 2018-01-24 | Automatic control variable damping valve |
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| CN (1) | CN108266415B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113833709B (en) * | 2021-11-25 | 2022-02-25 | 江苏汇智高端工程机械创新中心有限公司 | Adjustable load pressure compensation balance system, end cover and balance valve |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2700621Y (en) * | 2004-04-28 | 2005-05-18 | 浙江大学 | Pure water hydraulic throttle valve capable of precisely controlling flow |
| ITMI20041549A1 (en) * | 2004-07-29 | 2004-10-29 | Caleffi Spa | AUTOMATIC FLOW STABILIZER VALVE |
| CN101634317B (en) * | 2009-08-21 | 2011-12-28 | 宁波汉商液压有限公司 | Plug-in type balance valve |
| CN101865171A (en) * | 2010-07-02 | 2010-10-20 | 镇江大力液压马达有限责任公司 | Thread cartridge balanced valve |
| CN204312430U (en) * | 2014-11-27 | 2015-05-06 | 上海立新液压有限公司 | A kind of plug-in type proportional throttle valve |
| CN206329563U (en) * | 2016-11-15 | 2017-07-14 | 湖南凯恩利液压机械制造有限公司 | A kind of hydraulic control one-way valve, hydraulic system and plant equipment |
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- 2018-01-24 CN CN201810067195.XA patent/CN108266415B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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| CN108266415A (en) | 2018-07-10 |
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Effective date of registration: 20200602 Address after: 325000 room 105, building 4, Dongbao community, Fudong Road, Lucheng District, Wenzhou City, Zhejiang Province Applicant after: Yang Songping 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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Effective date of registration: 20240207 Address after: 102600, 5th floor, Building B, No. 6 Jinxiu Street, Beijing Economic and Technological Development Zone, Daxing District, Beijing Patentee after: BEIJING ARES TECHNOLOGY CO.,LTD. Country or region after: China Address before: Room 105, building 4, Dongbao community, Fudong Road, Lucheng District, Wenzhou City, Zhejiang Province 325000 Patentee before: Yang Songping Country or region before: China |