CN109296579B - Balance valve and hydraulic motor - Google Patents
Balance valve and hydraulic motor Download PDFInfo
- Publication number
- CN109296579B CN109296579B CN201811457244.7A CN201811457244A CN109296579B CN 109296579 B CN109296579 B CN 109296579B CN 201811457244 A CN201811457244 A CN 201811457244A CN 109296579 B CN109296579 B CN 109296579B
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- Prior art keywords
- valve
- balance valve
- way valve
- balance
- oil
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- 238000004891 communication Methods 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 230000002457 bidirectional effect Effects 0.000 claims 1
- 239000003921 oil Substances 0.000 description 110
- 238000010586 diagram Methods 0.000 description 6
- 239000010720 hydraulic oil Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000010354 integration Effects 0.000 description 4
- 230000002035 prolonged effect Effects 0.000 description 3
- 230000004308 accommodation Effects 0.000 description 2
- 239000010705 motor oil Substances 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
- F15B2013/002—Modular valves, i.e. consisting of an assembly of interchangeable components
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Safety Valves (AREA)
- Fluid-Pressure Circuits (AREA)
- Check Valves (AREA)
Abstract
The invention discloses a balance valve and a hydraulic motor, the balance valve comprises a valve body, a balance valve core, a first one-way valve and a second one-way valve, wherein a first oil inlet, a first oil outlet, a first flow passage communicated between the first oil inlet and the first oil outlet, and a second flow passage communicated between the balance valve core and the first oil inlet are arranged on the valve body.
Description
Technical Field
The invention relates to the technical field of hydraulic motors, in particular to a balance valve and a hydraulic motor with the same.
Background
A balance valve is a valve that is used to regulate the pressure across the valve or flow balance by way of a split flow. The hydraulic motor balance valve is a control valve used for the hydraulic motor to ensure the constant pressure of the oil inlet of the motor and ensure the hydraulic motor to run stably.
The balance valve and the motor of the existing hydraulic motor are two relatively independent modules, or the one-way valve of the motor oil inlet adopts a split structure, so that the balance valve is huge in size and increased in cost, and the return time of the balance valve core is overlong or too short because the return time cannot be controlled, so that the pressure impact of the hydraulic motor is large.
Disclosure of Invention
The invention aims to provide a balance valve so as to solve the technical problems of large volume and complex structure of the existing balance valve.
The invention further aims to provide a hydraulic motor, so as to solve the technical problems of complex structure, low integration level, small through flow, large pressure impact of the hydraulic motor and the like of the balance valve of the conventional hydraulic motor.
The invention is realized by the following technical scheme:
The invention provides a balance valve, which comprises a valve body, a balance valve core, a first one-way valve and a second one-way valve, wherein a first oil inlet, a first oil outlet, a first flow channel communicated with the balance valve core and the first oil inlet and a second flow channel communicated with the first oil inlet and the first oil outlet are formed in the valve body;
The first runner is internally provided with a first one-way valve, the first oil inlet is communicated with the oil inlet of the first one-way valve, the oil outlet of the first one-way valve is communicated with the balance valve core, the second runner is internally provided with a second one-way valve, the first oil inlet is connected with the first oil outlet through the second one-way valve, the balance valve core is connected with the second one-way valve, the balance valve core is coaxially arranged with the second one-way valve, the balance valve core is matched with the second one-way valve to block the communication of the first oil inlet and the first oil outlet, a containing cavity is formed between the balance valve core and the valve body, and a throttling structure for conducting the containing cavity and the second runner is arranged between the containing cavity and the second runner.
As with the balancing valve described above, the first one-way valve has a smaller excess flow than the second one-way valve.
The balance valve is sleeved with the spring, and the spring is used for controlling the opening pressure of the balance valve core.
As described above, the peripheral surface of the balance valve core, which is matched with the second one-way valve, is a conical surface.
The balance valve is characterized in that the throttling structure is a plug, and the flow of the throttling structure is adjustable.
As mentioned above, the throttle structure is an opening with a diameter gradually decreasing from the accommodating cavity to the second flow passage.
As described above, the balance valve is characterized in that the throttle structure is a throttle hole, and the diameters of the throttle holes from the accommodating cavity to the second flow passage are the same.
A second aspect of the invention provides a hydraulic motor comprising a balancing valve as described above.
The hydraulic motor as described above is a bi-directional hydraulic motor.
The balance valve comprises a valve body, a balance valve core, a first one-way valve and a second one-way valve, wherein the first one-way valve is arranged in a first flow channel, the first oil inlet is communicated with the oil inlet of the first one-way valve, the oil outlet of the first one-way valve is communicated with the balance valve core, the second one-way valve is arranged in a second flow channel, the first oil inlet is connected with the first oil outlet through the second one-way valve, the balance valve core is connected with the second one-way valve, and the balance valve core and the second one-way valve are coaxially arranged; when the balance valve is used, when a first oil inlet is used for feeding oil, a small part of oil enters the first side of the balance valve core through the first one-way valve, the balance valve core is pushed to move to the second side of the balance valve core, main pressure oil flows out of the first oil outlet through the second one-way valve and enters the driving element, when the pressure of the first oil inlet is reduced or the oil supply is insufficient, the balance valve core moves to the first side of the balance valve core, the pressure of the first oil outlet is increased, the driving element is reduced or even stops rotating, and due to the action of the first one-way valve, the oil in the accommodating cavity can only flow out of the throttling structure when the balance valve core moves to the first side of the balance valve core, so that the return time of the balance valve core is prolonged, the balance valve core moves stably, the oil outlet pressure of the driving element cannot be increased instantaneously, the pressure fluctuation is small, and the driving element is protected.
The hydraulic motor comprises the balance valve, the balance valve comprises a valve body, a balance valve core, a first one-way valve and a second one-way valve, wherein the first one-way valve is arranged in the first flow channel, the first oil inlet is communicated with the oil inlet of the first one-way valve, the oil outlet of the first one-way valve is communicated with the balance valve core, the second one-way valve is arranged in the second flow channel, the first oil inlet is connected with the first oil outlet through the second one-way valve, the balance valve core is connected with the second one-way valve, the balance valve core and the second one-way valve are coaxially arranged, and the hydraulic motor reduces the volume of the whole balance valve and has high integration degree by integrating the balance valve core, the first one-way valve and the second one-way valve on the valve body; when the balance valve is used, when a first oil inlet is used for feeding oil, a small part of oil enters the first side of the balance valve core through the first one-way valve, the balance valve core is pushed to move to the second side of the balance valve core, main pressure oil flows out from the first oil outlet through the second one-way valve and enters the hydraulic motor, when the pressure of the first oil inlet is reduced or the oil supply is insufficient, the balance valve core moves to the first side of the balance valve core, the oil passing through the hydraulic motor cannot flow out from the first oil outlet of the balance valve, the pressure of the first oil outlet is increased, the hydraulic motor is reduced or even stops rotating, and due to the action of the first one-way valve, the oil in the accommodating cavity can only flow out from the throttling structure when the balance valve core moves to prolong the return time of the balance valve core, so that the balance valve core moves stably, the oil outlet pressure of the hydraulic motor cannot be increased instantaneously, and the pressure fluctuation is small, thereby protecting the hydraulic motor.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a hydraulic motor balance valve according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a cross-sectional structure of a balance valve of a hydraulic motor according to an embodiment of the present invention;
Fig. 3 is a schematic structural diagram of a hydraulic motor balance valve according to an embodiment of the present invention.
Reference numerals illustrate:
1-a valve body;
2-balancing a valve core;
3-a first one-way valve;
4-a second one-way valve;
5-a receiving cavity;
6-throttling structure;
11-a first oil inlet;
12-a first oil outlet;
13-a first flow channel;
14-a second flow channel.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art. It should be noted that the azimuth or positional relationship indicated by the terms "left", "right", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present invention and simplifying the description, and are not indicative or implying that the apparatus or element to be referred must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present invention.
In the description of the present invention, it should be understood that the terms "comprises" and "comprising," and any variations thereof, as used herein, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements that are expressly listed or inherent to such process, method, article, or apparatus. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated.
A balance valve is a valve that is used to regulate the pressure across the valve or flow balance by way of a split flow. The hydraulic motor balance valve is a control valve used for the hydraulic motor to ensure the constant pressure of the oil inlet of the motor and ensure the hydraulic motor to run stably.
The balance valve of the existing hydraulic motor and the one-way valve of the motor oil inlet adopt a split structure, so that the balance valve is huge in size, the passing flow of the one-way valve is small, and the pressure impact of the hydraulic motor is large.
The present invention is based on the above problems and proposes a balancing valve and a hydraulic motor.
The balance valve and the hydraulic motor provided by the invention are described in detail below with reference to specific embodiments.
Embodiment one:
Fig. 1 is a schematic structural diagram of a hydraulic motor balance valve according to an embodiment of the present invention under a view angle, and fig. 2 is a schematic structural diagram of a cross section of the hydraulic motor balance valve according to an embodiment of the present invention, as shown in fig. 1 and 2, the balance valve according to the present embodiment includes a valve body 1, a balance valve core 2, a first check valve 3 and a second check valve 4, wherein a first oil inlet 11, a first oil outlet 12, a first flow channel 13 communicating the balance valve core 2 with the first oil inlet 11, and a second flow channel 14 communicating between the first oil inlet 11 and the first oil outlet 12 are provided on the valve body 1.
A first one-way valve 3 and a balance valve core 2 are arranged in the first flow passage 13, a second one-way valve 4 is arranged in the second flow passage, the first oil inlet 11 is communicated with the oil inlet of the first one-way valve 3, the oil outlet of the first one-way valve 3 is communicated with the balance valve core 2,
The first oil inlet 11 is connected with the first oil outlet 12 through the second one-way valve 4, the balance valve core 2 is connected with the second one-way valve 4, the balance valve core 2 and the second one-way valve 4 are coaxially arranged, the balance valve core 2 and the second one-way valve 4 are matched to block the communication between the first oil inlet 11 and the first oil outlet 12, a containing cavity 5 is formed between the balance valve core 2 and the valve body 1, and a throttling structure 6 for conducting the containing cavity 5 and the second flow passage 14 is arranged between the containing cavity 5 and the second flow passage 14.
In this embodiment, the valve body 1 is generally formed by machining a metal structure, and the shape and specific materials of the valve body 1 are not particularly limited in this embodiment.
The check valve in this embodiment is used for preventing the reverse flow of oil, and the hydraulic oil entering from the first oil inlet 11 flows through the first check valve 3 to push the balance valve core 2 to move rightwards, and the first check valve 3 in this embodiment makes the hydraulic oil on the left side of the balance valve core 2 unable to flow out from the first check valve 3 and can only flow out from the throttling structure, so as to slow the return time of the balance valve core and make the return of the balance valve stable. The specific structure of the first check valve 3 is not particularly limited in this embodiment.
In this embodiment, the hydraulic oil entering from the first oil inlet 11 enters the hydraulic driving element through the second flow passage 14 and the second one-way valve 4, and the specific structure of the second one-way valve 4 is not particularly limited in this embodiment.
The balance valve comprises a valve body, a balance valve core, a first one-way valve and a second one-way valve, wherein the first one-way valve is arranged in a first flow channel, a first oil inlet is communicated with an oil inlet of the first one-way valve, an oil outlet of the first one-way valve is communicated with the balance valve core, the second one-way valve is arranged in a second flow channel, the first oil inlet is connected with the first oil outlet through the second one-way valve, the balance valve core is connected with the second one-way valve, and the balance valve core and the second one-way valve are coaxially arranged; when the balance valve is used, when a first oil inlet is used for feeding oil, a small part of oil enters the first side of the balance valve core through the first one-way valve, the balance valve core is pushed to move to the second side of the balance valve core, main pressure oil flows out from the first oil outlet through the second one-way valve, enters the driving element and flows out through the balance valve, when the pressure of the first oil inlet is reduced or the oil supply is insufficient, the balance valve core moves to the first side of the balance valve core, returns to the middle position, the oil passing through the driving element cannot flow out from the balance valve, and the driving element is reduced in speed or even stops rotating.
Embodiment two:
the present embodiment provides a balance valve having a similar overall structure to that of the first embodiment, except that the first check valve, the second check valve, and the balance valve element are specifically described.
In this embodiment, the hydraulic oil passing through the first one-way valve drives the balance valve core to act, the hydraulic oil passing through the second one-way valve is used for providing power for the driving element, and the excessive flow of the first one-way valve is smaller than that of the second one-way valve.
Further, in this embodiment, a spring is sleeved on the balance valve core, and the spring is used for controlling the opening pressure of the balance valve core, and the spring is used for controlling the movement and return of the balance valve core, so that the structure is simple, and the realization is convenient.
In this embodiment, the peripheral surface of the balance valve core matched with the second one-way valve is a conical surface, and by adopting conical surface matching, the matching volume of the balance valve core and the second one-way valve is further reduced, and the integration level of the whole balance valve is improved.
Embodiment III:
The present embodiment provides a balance valve having a similar overall structure to that of the first embodiment, except that the present embodiment specifically describes a throttle structure.
In this embodiment, the throttling structure is a throttling hole, and the diameters of the throttling holes from the accommodating cavity to the second flow channel are the same.
Optionally, the throttle structure is from the trompil that the diameter diminishes gradually between holding chamber to the second runner, through setting up the throttle structure as from the trompil that the diameter diminishes gradually between holding chamber to the second runner, the return time that can be further prolonged balanced case makes balanced case motion more steady.
Alternatively, or the throttling structure is a plug, and the flow of the throttling structure is adjustable. By setting the flow rate of the throttle structure to be adjustable, the flow rate of the throttle structure can be adjusted according to actual operation conditions.
Embodiment four:
fig. 3 is a schematic structural diagram of a hydraulic motor balance valve according to an embodiment of the present invention, and referring to fig. 2 and 3, the present embodiment provides a hydraulic motor, which includes the balance valve according to the first embodiment, the second embodiment, or the third embodiment.
For example, the balance valve of the hydraulic motor of the embodiment comprises a valve body 1, a balance valve core 2, a first one-way valve 3 and a second one-way valve 4, wherein a first oil inlet 11, a first oil outlet 12, a first flow passage 13 and a second flow passage 14 which are communicated between the first oil inlet 11 and the first oil outlet 12 are formed in the valve body;
Be provided with first check valve 3, balanced case 2 in the first runner 13, be provided with second check valve 4 in the second runner, first oil inlet 11 with the oil inlet intercommunication of first check valve 3, the oil-out of first check valve 3 with balanced case 2 intercommunication, first oil-out 11 passes through second check valve 4 and first oil-out 12 are connected, balanced case 2 with second check valve 4 is connected, balanced case 2 with the coaxial setting of second check valve 4, balanced case 2 with have accommodation chamber 5 between the valve body 1, the accommodation chamber with be provided with throttle structure 6 between the second runner.
Further, the hydraulic motor is a bi-directional hydraulic motor.
The working process and principle of the hydraulic motor balance valve of the embodiment are as follows:
When the motor advances oil, a small part of oil enters the left side of the balance valve core 2 through the first one-way valve 3 and the first flow passage 13, the left side pressure of the balance valve core 2 rises to push the balance valve core 2 to move rightwards, meanwhile, main pressure oil enters the hydraulic motor through the second flow passage 14 and the second one-way valve 4 and then flows out of the oil outlet, when the pressure of the first oil inlet 11 drops or oil supply is insufficient, the balance valve core 2 moves leftwards under the action of spring force to return, and the oil passing through the hydraulic motor cannot flow out of the oil outlet (not visible in the figure), so that the pressure of the oil outlet rises, and the hydraulic motor slows down or even stops rotating. Due to the action of the first one-way valve 3, when the balance valve core 2 moves leftwards, oil in the cavity at the left side of the balance valve core 2 can only flow out through the throttling structure 6, so that the return time of the balance valve core is prolonged, the balance valve core 2 moves stably, the oil outlet pressure of the hydraulic motor cannot rise instantaneously, and the pressure fluctuation is small, so that the hydraulic motor is protected.
The hydraulic motor comprises the balance valve, the balance valve comprises a valve body, a balance valve core, a first one-way valve and a second one-way valve, wherein the first one-way valve is arranged in the first flow channel, the first oil inlet is communicated with the oil inlet of the first one-way valve, the oil outlet of the first one-way valve is communicated with the balance valve core, the second one-way valve is arranged in the second flow channel, the first oil inlet is connected with the first oil outlet through the second one-way valve, the balance valve core is connected with the second one-way valve, the balance valve core and the second one-way valve are coaxially arranged, and the hydraulic motor reduces the volume of the whole balance valve and has high integration degree by integrating the balance valve core, the first one-way valve and the second one-way valve on the valve body; when the balance valve is used, when a first oil inlet is used for feeding oil, a small part of oil enters the first side of the balance valve core through the first one-way valve, the balance valve core is pushed to move to the second side of the balance valve core, main pressure oil flows out from the first oil outlet through the second one-way valve and enters the hydraulic motor, when the pressure of the first oil inlet is reduced or the oil supply is insufficient, the balance valve core moves to the first side of the balance valve core, the oil passing through the hydraulic motor cannot flow out from the first oil outlet of the balance valve, the pressure of the first oil outlet is increased, the hydraulic motor is reduced or even stops rotating, and due to the action of the first one-way valve, the oil in the accommodating cavity can only flow out from the throttling structure when the balance valve core moves to prolong the return time of the balance valve core, so that the balance valve core moves stably, the oil outlet pressure of the hydraulic motor cannot be increased instantaneously, and the pressure fluctuation is small, thereby protecting the hydraulic motor.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (9)
1. A balancing valve, characterized by:
the valve body is provided with a first oil inlet, a first oil outlet, a first flow passage communicated with the balance valve core and the first oil inlet and a second flow passage communicated between the first oil inlet and the first oil outlet;
The first runner is internally provided with a first one-way valve, the first oil inlet is communicated with the oil inlet of the first one-way valve, the oil outlet of the first one-way valve is communicated with the balance valve core, the second runner is internally provided with a second one-way valve, the first oil inlet is connected with the first oil outlet through the second one-way valve, the balance valve core is connected with the second one-way valve, the balance valve core is coaxially arranged with the second one-way valve, the balance valve core is matched with the second one-way valve to block the communication of the first oil inlet and the first oil outlet, a containing cavity is formed between the balance valve core and the valve body, and a throttling structure for conducting the containing cavity and the second runner is arranged between the containing cavity and the second runner.
2. The balancing valve of claim 1, wherein:
the over-flow of the first one-way valve is smaller than that of the second one-way valve.
3. The balancing valve of claim 1, wherein:
And the balance valve core is sleeved with a spring, and the spring is used for controlling the opening/closing pressure of the balance valve core.
4. The balancing valve of claim 1, wherein:
the peripheral surface of the balance valve core matched with the second one-way valve is a conical surface.
5. The balancing valve of claim 1, wherein:
the throttling structure is a throttling hole, and the diameters of the throttling holes from the accommodating cavity to the second flow passage are the same.
6. The balancing valve of claim 1, wherein:
The throttling structure is an opening with the diameter gradually becoming smaller from the accommodating cavity to the second flow passage.
7. The balancing valve of claim 1, wherein:
The throttle structure is a plug, and the flow of the throttle structure is adjustable.
8. A hydraulic motor, characterized in that it comprises a balancing valve according to any one of claims 1-7.
9. The hydraulic motor of claim 8, wherein:
The hydraulic motor is a bidirectional hydraulic motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811457244.7A CN109296579B (en) | 2018-11-30 | 2018-11-30 | Balance valve and hydraulic motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811457244.7A CN109296579B (en) | 2018-11-30 | 2018-11-30 | Balance valve and hydraulic motor |
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| Publication Number | Publication Date |
|---|---|
| CN109296579A CN109296579A (en) | 2019-02-01 |
| CN109296579B true CN109296579B (en) | 2024-06-07 |
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|---|---|---|---|
| CN201811457244.7A Active CN109296579B (en) | 2018-11-30 | 2018-11-30 | Balance valve and hydraulic motor |
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| CN (1) | CN109296579B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113653695B (en) * | 2021-08-30 | 2023-08-25 | 杭州力龙液压有限公司 | Balancing valve structure and engineering machinery |
| CN115478977B (en) * | 2022-09-29 | 2023-07-07 | 青岛力克川液压机械有限公司 | Hydraulic motor device capable of collecting output rotating speed in real time |
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| CN101956734A (en) * | 2010-10-21 | 2011-01-26 | 吴赛珍 | Balance speed regulating integrated valve |
| CN103775434A (en) * | 2013-12-31 | 2014-05-07 | 中南大学 | Cartridge valve model selection method for direction control in vibration environment |
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| CN205654630U (en) * | 2016-03-03 | 2016-10-19 | 杭州力龙液压有限公司 | Antihunting valve |
| CN206972640U (en) * | 2017-07-17 | 2018-02-06 | 邹城市益凯德液压有限公司 | Bidirectional balanced valve |
| CN209261948U (en) * | 2018-11-30 | 2019-08-16 | 杭州力龙液压有限公司 | Balanced valve and hydraulic motor |
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2018
- 2018-11-30 CN CN201811457244.7A patent/CN109296579B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07190002A (en) * | 1993-12-27 | 1995-07-28 | Hitachi Constr Mach Co Ltd | Hydraulic driving device |
| KR20080006951A (en) * | 2006-07-14 | 2008-01-17 | 볼보 컨스트럭션 이키프먼트 홀딩 스웨덴 에이비 | Counter balance valve of dynamometer machine |
| CN101956734A (en) * | 2010-10-21 | 2011-01-26 | 吴赛珍 | Balance speed regulating integrated valve |
| CN103775434A (en) * | 2013-12-31 | 2014-05-07 | 中南大学 | Cartridge valve model selection method for direction control in vibration environment |
| CN105201942A (en) * | 2014-10-24 | 2015-12-30 | 徐州重型机械有限公司 | Balance valve and automobile crane |
| CN105201943A (en) * | 2015-01-23 | 2015-12-30 | 徐州重型机械有限公司 | Reversing valve, oil cylinder falling control valve and crane amplitude variation system |
| CN205654630U (en) * | 2016-03-03 | 2016-10-19 | 杭州力龙液压有限公司 | Antihunting valve |
| CN206972640U (en) * | 2017-07-17 | 2018-02-06 | 邹城市益凯德液压有限公司 | Bidirectional balanced valve |
| CN209261948U (en) * | 2018-11-30 | 2019-08-16 | 杭州力龙液压有限公司 | Balanced valve and hydraulic motor |
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| Publication number | Publication date |
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| CN109296579A (en) | 2019-02-01 |
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