CN114060339B - Reverse unloading valve capable of preventing hydraulic pump from overheating - Google Patents
Reverse unloading valve capable of preventing hydraulic pump from overheating Download PDFInfo
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- CN114060339B CN114060339B CN202111347493.2A CN202111347493A CN114060339B CN 114060339 B CN114060339 B CN 114060339B CN 202111347493 A CN202111347493 A CN 202111347493A CN 114060339 B CN114060339 B CN 114060339B
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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
- F15B13/024—Pressure relief valves
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Multiple-Way Valves (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The reverse unloading valve capable of preventing overheat of hydraulic pump includes valve body, oil inlet, oil outlet and oil return port inside the valve body, and the oil inlet is communicated with the oil outlet via the connecting channel inside the valve body, and the valve core has micro channel communicated with the oil outlet and the oil return port. The micro through holes are formed in the bottom surface of the balance groove of the valve core, the micro through holes, the blind holes and the through holes form a micro channel together, the flow is controlled through the diameter of the micro through holes, so that the heat generated by the hydraulic pump can be just taken away by the flow of the micro channel plus the internal leakage of the hydraulic driving device, the hydraulic pump cannot be overheated, meanwhile, the energy is saved, the micro through holes are quite simple to process, and the processing cost is low; in addition, the manufacturing difficulty and the processing technology of the oil passage are simplified through the arrangement of the micro-channels, so that the oil passage can be manufactured by using simple chamfering, and the manufacturing cost of the application can be greatly reduced.
Description
Technical Field
The application relates to a hydraulic machine, in particular to a reverse unloading valve used for working conditions such as frequent pressure maintaining and reversing in a hydraulic system.
Background
In hydraulic machinery, there is a hydraulic driving device, such as a hydraulic motor, a hydraulic cylinder and the like, which are driven by high-pressure hydraulic oil provided by a hydraulic pump as power, the hydraulic motor often needs to be switched between forward rotation and reverse rotation, the hydraulic cylinder is switched between forward rotation and reverse rotation, and as the switching time is completed in an instant, all devices of the whole hydraulic system are impacted extremely, a large noise is inevitably generated, and meanwhile, the service life of all devices of the whole hydraulic system is greatly shortened due to strong impact stress. In order to solve the problem, the inventor submits an application patent with application number 202110755366X to the national intellectual property agency patent office in 2021 for 7 months and 5 days, and the application discloses a reverse unloading valve which comprises a valve body, wherein an oil inlet connected with a hydraulic pump and an oil outlet connected with a hydraulic driving device are arranged in the valve body, the oil inlet is communicated with the oil outlet through a communicating channel in the valve body, a valve core capable of cutting off the communication between the oil inlet and the oil outlet is arranged in the communicating channel, an oil return port connected with an oil tank for recovering oil in a hydraulic system is also arranged in the valve body, and an oil passage with adjustable flow along with the movement of the valve core is arranged between the oil outlet and the oil return port. The inventor skillfully sets the unloading channel with variable flow along with the movement of the valve core in the reverse unloading valve of the application to buffer the instant impact stress of the hydraulic driving device when the working state is switched, thereby well solving the problems in the prior art.
The application solves the problem that the heat generated by the hydraulic pump cannot be taken away in time due to the tiny output flow of the hydraulic pump in the pressure keeping stage or the load slow-moving stage of the hydraulic pump after the impact problem of reverse unloading in the prior art is solved, and the problem that the hydraulic pump is overheated is solved. The control requirement of the output flow required for solving the overheating problem of the hydraulic pump is very accurate, the output flow is large, the energy is not saved, the output flow is small, and the overheating problem of the hydraulic pump is not solved.
Disclosure of Invention
In order to overcome the defects, the technical problems to be solved by the application are as follows: the reverse unloading valve capable of preventing the hydraulic pump from being overheated can greatly reduce the manufacturing difficulty of the valve core, thereby greatly reducing the manufacturing cost.
The technical scheme for solving the problems in the prior art is as follows: the utility model provides a can prevent overheated reverse off-load valve of hydraulic pump, it includes the valve body, be equipped with the oil inlet that is connected with the hydraulic pump in the valve body and the oil-out that is connected with hydraulic drive device and the oil return mouth that is connected with the oil tank of retrieving hydraulic system fluid, the oil inlet through the internal intercommunication way of valve with the oil-out is linked together, be equipped with in the intercommunication way and can cut off the case that is linked together between oil inlet, the oil-out, be equipped with the microchannel on the case, the microchannel can be linked together with oil-out, oil return mouth respectively when hydraulic drive device is in the pressurize state.
The micro-channel is arranged on the valve core, namely, a micro-through hole with a proper diameter is formed in a proper position of the side wall of the valve core, the micro-channel is respectively communicated with the oil outlet and the oil return port only when the hydraulic driving device is in a pressure maintaining state, the flow of the micro-channel plus the internal leakage flow of the hydraulic driving device is equal to the flow required by the hydraulic pump to maintain stable temperature, and when the hydraulic driving device is in a non-pressure maintaining state, the micro-channel is not communicated with the oil return port, and the oil outlet and the oil return port are separated. Because the valve core solves the problem of overheating of the hydraulic pump by punching the micro through hole, the positioning of the oil passage for solving the buffer problem of the reverse unloading valve and the control of the flow rate can not be very accurate, thereby greatly reducing the manufacturing difficulty of the valve core and further greatly reducing the manufacturing cost.
As a further technical scheme, be equipped with the blind hole in the case, the blind end orientation of blind hole the oil inlet, be equipped with the through-hole in being close to on the lateral wall of blind hole the blind end position department of blind hole, the through-hole respectively with blind hole, oil-out are linked together, still be equipped with little through-hole on the lateral wall of blind hole, when hydraulic drive device is in the pressurize state, little through-hole respectively with blind hole, oil return opening are linked together, the microchannel is by little through-hole, blind hole, through-hole are constituteed jointly. In order to balance the pressure at two ends of the valve core, blind holes and through holes are arranged on the valve core, and in order to reduce the manufacturing cost of the micro-channel, micro-through holes are arranged on the side wall of the valve core, and the micro-channel is jointly formed by the micro-through holes and the existing blind holes and through holes.
As a further technical scheme, a plurality of annular balance grooves are formed in the outer peripheral surface of the valve core, and one balance groove is located at the position of the micro through hole. The outer peripheral surface of the valve core is provided with a plurality of annular balance grooves, so that high-pressure hydraulic oil can quickly form a uniform and stable oil film between the valve core and the valve body along the annular balance grooves, the lubricating environment is improved, the abrasion is slowed down, and the service life of the valve core is prolonged. Drilling a micro through hole on the surface of the valve core can cause burrs or burrs on the smooth outer surface of the valve core, which is unfavorable for sliding fit between the valve core and the valve body, and arranging one of the balance grooves at the position of the micro through hole.
As a further technical scheme, the outer peripheral surface of the valve core is provided with an annular groove between the micro through hole and the through hole, the annular groove is communicated with the oil return port, the groove wall of the annular groove facing one side of the through hole is provided with a chamfer, and an unloading channel formed between the chamfer and the valve body is communicated with the oil outlet when the hydraulic driving device is in an unloading state. The chamfer forms are used for removing materials to form an unloading channel together with the valve body, so that the processing is simple, and the manufacturing cost is low.
The beneficial effects are that: the bottom surface of the annular balance groove with the valve core at the proper position is provided with the micro through holes with proper size, the micro through holes, the blind holes on the valve core and the through holes form a micro channel together, proper flow is controlled by controlling the micro through holes with proper diameters, so that the proper flow of the micro channel and the internal leakage of the hydraulic driving device just can take away the heat generated by the hydraulic pump, the hydraulic pump can not generate overheat, the energy is saved, the micro through holes are quite simple to process, and the processing cost is low; the application greatly simplifies the manufacturing difficulty and the processing technology of the oil passage for buffering reverse unloading impact stress through the arrangement of the micro-channels, so that the oil passage can be manufactured by using simple chamfering, and the manufacturing cost of the application can be greatly reduced.
Drawings
FIG. 1 is a schematic perspective view of a structure of the present application;
FIG. 2 is a schematic front view of a structure of the present application;
FIG. 3 is a schematic cross-sectional view A-A of FIG. 2;
FIG. 4 is an enlarged schematic view of portion M of FIG. 3;
fig. 5 is a schematic perspective view of a valve cartridge in the present application.
In the figure: the valve comprises a valve body 1, an oil inlet 2, an oil outlet 3, a communication channel 4, a valve core 5, a plug 6, a blind hole 7, a spring 8, a through hole 9, a chamfer 10, an annular groove 11, an oil return port 12, a cavity 13, an overflow valve 14, a balance groove 15 and a micro through hole 16.
Detailed Description
The application will now be further illustrated by means of specific examples in connection with the accompanying drawings.
Examples: the reverse unloading valve capable of preventing the overheating of the hydraulic pump comprises a valve body 1, wherein an oil inlet 2 connected with the hydraulic pump, an oil outlet 3 connected with a hydraulic driving device and an oil return port 12 connected with an oil tank for recovering oil in a hydraulic system are arranged in the valve body 1, the oil inlet 2 is communicated with the oil outlet 3 through a communicating channel 4 in the valve body 1, a valve core 5 capable of cutting off the communication between the oil inlet 2 and the oil outlet 3 is arranged in the communicating channel 4, and a micro-channel is arranged on the valve core 5 and can be respectively communicated with the oil outlet 3 and the oil return port 12 when the hydraulic driving device is in a pressure maintaining state. The end of the communication channel 4 far away from the oil inlet 2 extends outwards and penetrates through the valve body 1, the end of the communication channel 4 far away from the end of the oil inlet 2 is provided with a plug 6 which is in threaded connection with the valve body 1, a blind hole 7 is arranged in the valve core 5, the closed end of the blind hole 7 faces the oil inlet 2, the open end of the blind hole 7 faces the plug 6, a through hole 9 is arranged on the side wall of the blind hole 7 at a position close to the closed end of the blind hole 7, the through hole 9 is respectively communicated with the blind hole 7 and the oil outlet 3, a micro through hole 16 is further arranged on the side wall of the blind hole 7, the micro through hole 16 is respectively communicated with the blind hole 7 and the oil return port 12 when the hydraulic driving device is in a pressure maintaining state, the micro through hole is jointly formed by the micro through hole 16, the blind hole 7 and the through hole 9, a plurality of annular balance grooves 15 are arranged on the outer peripheral surface of the valve core 5, one of the balance grooves 15 is positioned at the position of the micro through hole 16, a spring 8 is arranged between the plug 6 and the valve core 5, one end of the spring 8 is abutted against the bottom surface of the blind hole 7 of the valve core 5, the other end of the spring 8 is abutted against the pit bottom surface of the plug 6, the peripheral surface of the valve core 5 is provided with an annular groove 11 between the micro through hole 16 and the through hole 9, the annular groove 11 is communicated with the oil return opening 12, the groove wall of the annular groove 11 facing one side of the through hole 9 is provided with a chamfer 10, an unloading channel formed between the chamfer 10 and the valve body 1 is communicated with the oil outlet 3 when the hydraulic driving device is in an unloading state, a cavity 13 is further arranged in the valve body 1, the cavity 13 surrounds the peripheral side of the valve core 5, the cavity 13 is further respectively communicated with the annular groove 11 and the oil return channel, in order to ensure the safety of the reverse unloading valve and the hydraulic driving device, an overflow valve 14 is arranged between the oil outlet 3 and the oil return port 12.
The above-described embodiment is only a preferred embodiment of the present application, and is not intended to limit the present application in any way, and other variations and modifications may be made without departing from the technical aspects set forth in the claims.
What is not described in detail in this specification is prior art known to those skilled in the art.
Claims (3)
1. The reverse unloading valve capable of preventing the hydraulic pump from overheating comprises a valve body, wherein an oil inlet connected with the hydraulic pump, an oil outlet connected with a hydraulic driving device and an oil return port connected with an oil tank for recovering the oil in a hydraulic system are arranged in the valve body; the valve is characterized in that a blind hole is arranged in the valve core, the closed end of the blind hole faces the oil inlet, a through hole is formed in the side wall of the blind hole and close to the position of the closed end of the blind hole, the through hole is respectively communicated with the blind hole and the oil outlet, a micro through hole is further formed in the side wall of the blind hole, and when the hydraulic driving device is in a pressure maintaining state, the micro through hole is respectively communicated with the blind hole and the oil return port, and the micro channel is composed of the micro through hole, the blind hole and the through hole.
2. The reverse unloading valve according to claim 1, wherein a plurality of annular balance grooves are provided on an outer peripheral surface of the spool, one of the balance grooves being located at the position of the micro through hole.
3. The reverse unloading valve according to claim 1 or 2, wherein an annular groove is provided on the outer peripheral surface of the valve element between the micro through hole and the through hole, the annular groove is communicated with the oil return port, a chamfer is provided on a groove wall of the annular groove facing to one side of the through hole, and an unloading passage formed between the chamfer and the valve body is communicated with the oil outlet port when the hydraulic driving device is in an unloading state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111347493.2A CN114060339B (en) | 2021-11-15 | 2021-11-15 | Reverse unloading valve capable of preventing hydraulic pump from overheating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111347493.2A CN114060339B (en) | 2021-11-15 | 2021-11-15 | Reverse unloading valve capable of preventing hydraulic pump from overheating |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114060339A CN114060339A (en) | 2022-02-18 |
| CN114060339B true CN114060339B (en) | 2023-09-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111347493.2A Active CN114060339B (en) | 2021-11-15 | 2021-11-15 | Reverse unloading valve capable of preventing hydraulic pump from overheating |
Country Status (1)
| Country | Link |
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| CN (1) | CN114060339B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0650301A (en) * | 1992-07-28 | 1994-02-22 | Komatsu Ltd | Unloading device of hydraulic circuit |
| CN2416266Y (en) * | 2000-03-13 | 2001-01-24 | 厦门工程机械股份有限公司 | Priority unloading valve |
| CN103062148A (en) * | 2013-01-30 | 2013-04-24 | 浙江海克力液压有限公司 | Energy-saving type prior unloading valve |
| CN104989690A (en) * | 2015-06-29 | 2015-10-21 | 象山盛韵汽配科技有限公司 | Overload relief valve |
| CN212615679U (en) * | 2020-06-03 | 2021-02-26 | 圣邦集团有限公司 | Unloading control valve |
| CN113374890A (en) * | 2021-07-05 | 2021-09-10 | 王洪继 | Reverse unloading valve |
-
2021
- 2021-11-15 CN CN202111347493.2A patent/CN114060339B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0650301A (en) * | 1992-07-28 | 1994-02-22 | Komatsu Ltd | Unloading device of hydraulic circuit |
| CN2416266Y (en) * | 2000-03-13 | 2001-01-24 | 厦门工程机械股份有限公司 | Priority unloading valve |
| CN103062148A (en) * | 2013-01-30 | 2013-04-24 | 浙江海克力液压有限公司 | Energy-saving type prior unloading valve |
| CN104989690A (en) * | 2015-06-29 | 2015-10-21 | 象山盛韵汽配科技有限公司 | Overload relief valve |
| CN212615679U (en) * | 2020-06-03 | 2021-02-26 | 圣邦集团有限公司 | Unloading control valve |
| CN113374890A (en) * | 2021-07-05 | 2021-09-10 | 王洪继 | Reverse unloading valve |
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| Publication number | Publication date |
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| CN114060339A (en) | 2022-02-18 |
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| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20230525 Address after: No. 48 Tangdeng Road, Baita Block, Xianju County Economic Development Zone, Taizhou City, Zhejiang Province, 317300 Applicant after: Taizhou Hongyi Hydraulic Servo Technology Co.,Ltd. Address before: 317300 No.31, Chengbei West Road, Anzhou street, Xianju County, Taizhou City, Zhejiang Province Applicant before: Wang Hongji |
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