CN113096980B - Quick reversing device and method for on-load tap-changer based on hydraulic transmission - Google Patents
Quick reversing device and method for on-load tap-changer based on hydraulic transmission Download PDFInfo
- Publication number
- CN113096980B CN113096980B CN202110350588.3A CN202110350588A CN113096980B CN 113096980 B CN113096980 B CN 113096980B CN 202110350588 A CN202110350588 A CN 202110350588A CN 113096980 B CN113096980 B CN 113096980B
- Authority
- CN
- China
- Prior art keywords
- electromagnetic valve
- way electromagnetic
- air bag
- hydraulic
- energy
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
- H01H33/28—Power arrangements internal to the switch for operating the driving mechanism
- H01H33/30—Power arrangements internal to the switch for operating the driving mechanism using fluid actuator
- H01H33/34—Power arrangements internal to the switch for operating the driving mechanism using fluid actuator hydraulic
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/0005—Tap change devices
- H01H9/0027—Operating mechanisms
Landscapes
- Fluid-Pressure Circuits (AREA)
Abstract
The invention provides a quick reversing device and method for an on-load tap-changer based on hydraulic transmission, which comprises an auxiliary element, an air bag type energy accumulator and a rack and pinion type hydraulic swing cylinder, wherein the auxiliary element is arranged on the upper part of the auxiliary element; the auxiliary element comprises an oil tank and a three-position four-way electromagnetic valve, the oil tank is connected with the three-position four-way electromagnetic valve through an overflow valve, and the three-position four-way electromagnetic valve is connected with the air bag type energy accumulator and the rack and pinion type hydraulic swing cylinder. And the gear and rack type hydraulic swing cylinder is driven to realize reversing action by the energy storage and release of the air bag type energy accumulator. The invention stores and releases energy and realizes quick reversing in a hydraulic transmission mode, and has the advantages of stable switching, stable speed, flexible element arrangement, accurate positioning and the like compared with the prior device.
Description
Technical Field
The invention relates to the field of engineering machinery and electric power systems, in particular to a quick reversing device and method for an on-load tap-changer based on hydraulic transmission.
Background
The on-load tap-changer is a core component in an extra-high voltage converter transformer, is a switching device for ensuring that current is not cut off when the transformer is used for regulating voltage, and can ensure that the transformer realizes on-load voltage regulation. However, in the process of tap changing in the transformer winding, an arc phenomenon may occur, and in the process of tap changing, a backflow phenomenon may occur in the on-load tap changer, and both the generated arc and the generated backflow phenomenon may cause damage to the whole system, and it is more likely that the whole transformer is directly burned. Therefore, in order to ensure that on-load voltage regulation of the transformer is successfully realized, a form that a switching core is matched with a tapping selector is often adopted, namely, a combined on-load voltage regulation tapping switch is adopted.
At present, energy storage devices in switching cores at abroad and at home adopt driving mechanisms to extrude springs to finish an energy storage process, and after the energy storage is finished, triggers to release energy to drive the switching device to finish a reversing action.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a quick reversing device and a quick reversing method for an on-load tap-changer based on hydraulic transmission, so as to solve the problems of collision and insufficient energy storage of a system caused by a switching device in the prior art and improve the stability of the system.
In order to achieve the technical purpose, the technical scheme of the invention is as follows:
a quick reversing device for an on-load tap-changer based on hydraulic transmission comprises an auxiliary element, an air bag type energy accumulator and a rack and pinion type hydraulic swing cylinder;
the auxiliary element comprises an oil tank and a three-position four-way electromagnetic valve, the oil tank is connected with the three-position four-way electromagnetic valve through an overflow valve, and the three-position four-way electromagnetic valve is connected with the air bag type energy accumulator and the rack and pinion type hydraulic swing cylinder.
The invention is further improved in that a coarse filter, a fine filter and a hydraulic pump are arranged on a pipeline between the outlet of the oil tank and the three-position four-way electromagnetic valve.
The invention is further improved in that the hydraulic pump is connected with a motor.
The invention is further improved in that a first pressure gauge, a throttle valve and a two-position two-way electromagnetic valve are sequentially arranged between the hydraulic pump and the three-position four-way electromagnetic valve.
The invention has the further improvement that a second pressure gauge is arranged on the air bag type energy accumulator; the air bag in the bag type accumulator is filled with nitrogen.
The invention is further improved in that the auxiliary element, the airbag accumulator and the rack and pinion hydraulic swing cylinder are arranged on the system support.
The invention has the further improvement that the auxiliary element also comprises a control box, and the motor, the second pressure gauge, the two-position two-way electromagnetic valve and the three-position four-way electromagnetic valve are all connected with the control box.
The invention is further improved in that a sensor is arranged in the rack and pinion type hydraulic swing cylinder, and the sensor is connected with the control box.
The invention has the further improvement that when the energy is stored, the two-position two-way electromagnetic valve is in a closed state, the three-position four-way electromagnetic valve is in a closed state, the hydraulic pump fills hydraulic oil into the air bag type energy accumulator to extrude an air bag in the air bag type energy accumulator to start energy storage, when the stored energy is met, the two-position two-way electromagnetic valve is switched to the closed state, and the energy storage element is in an energy storage ending state;
when the energy is released, the two-position two-way electromagnetic valve is in a closed-circuit state, the three-position four-way electromagnetic valve is switched to a closed-circuit state, the air bag in the air bag type energy accumulator extrudes hydraulic oil to the rack and pinion type hydraulic swing cylinder, and when the rack and pinion type hydraulic swing cylinder swings to an expected position, the three-position four-way electromagnetic valve is switched to the closed-circuit state, so that the energy release process of the energy storage element and the reversing process of the rack and pinion type hydraulic swing cylinder are completed.
A hydraulic transmission of the device is used for a quick reversing method of an on-load tap changer, when a system stores energy, a two-position two-way electromagnetic valve is in a closed state, a three-position four-way electromagnetic valve is in a closed state, hydraulic oil is flushed into an air bag type energy accumulator by a hydraulic pump, the hydraulic oil flushed into the air bag type energy accumulator extrudes an air bag in the air bag type energy accumulator, the air bag is compressed to store energy, and when the air bag type energy accumulator stores energy, the two-position two-way electromagnetic valve is switched to the closed state;
when energy is released, the three-position four-way electromagnetic valve is switched to be in a closed circuit state, the two-position two-way electromagnetic valve is in a closed circuit state, the air bag in the air bag type energy accumulator expands to release energy, hydraulic oil is extruded out of the air bag type energy accumulator, the extruded hydraulic oil reaches the rack and pinion type hydraulic swing cylinder through the three-position four-way electromagnetic valve, the rack and pinion type hydraulic swing cylinder is driven to rotate to achieve a reversing function, and when the rack and pinion type hydraulic swing cylinder swings to a preset position, the three-position four-way electromagnetic valve is switched to be in the closed circuit state, so that reversing action is completed.
Compared with the prior art, the invention has the following beneficial effects: the invention stores energy through the air bag type energy accumulator, and controls the energy release and the energy release ending through the three-position four-way electromagnetic valve, thereby not only avoiding the problem of long-time use failure like a spring, but also improving the dynamic performance of the whole reversing device. The device adopts the air bag type energy accumulator to store energy, and the overflow valve is used for ensuring that enough energy is stored in the air bag type energy accumulator, so that the pressure in the air bag type energy accumulator can always meet the pressure requirement required by the rack and pinion type hydraulic swing cylinder, and the problem of insufficient energy storage caused by long-time use of a spring and reduction of the rigidity of the spring can be avoided.
Furthermore, the device adopts the control box to control the three-position four-way electromagnetic valve, the three-position four-way electromagnetic valve controls the flow of the hydraulic oil so as to control the movement of the hydraulic swing cylinder, and when the sensor senses that the hydraulic swing cylinder moves to a specified position, the control box obtains a signal to instantly control the three-position four-way electromagnetic valve to be switched to a middle position, so that the hydraulic swing cylinder stops moving, and the larger collision force caused by uncontrollable energy released by the spring when the spring is used for storing energy is effectively reduced.
The invention drives the rack and pinion type hydraulic swing cylinder to realize reversing action by the energy storage and release of the airbag type energy accumulator, and stores and releases energy and realizes quick reversing in a hydraulic transmission mode.
Drawings
Various other advantages and benefits of the present invention will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. It is obvious that the drawings described below are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. Also, like parts are designated by like reference numerals throughout the drawings.
In the attached drawings
Fig. 1 is a schematic structural diagram of a quick reversing device for an on-load tap changer based on hydraulic transmission according to the invention;
FIG. 2 is a front view of FIG. 1;
fig. 3 is an engineering schematic diagram of a fast commutation method for an on-load tap changer based on hydraulic transmission.
Wherein: 1-an auxiliary element; 2-an energy storage element; 3-a switching element; 10-a control box; 11-an oil tank; 12-a coarse filter; 13-a motor; 14-a hydraulic pump; 15-fine filter; 16-a first pressure gauge; 17-an overflow valve; 18-a throttle valve; 19-a two-position two-way solenoid valve; 110-three-position four-way solenoid valve; 120-hydraulic oil pipe; 130-a system support; 21-a bladder accumulator; 210-a second pressure gauge; 31-a rack and pinion hydraulic swing cylinder; 32-sensor.
Detailed Description
In order to make the technical means of the present invention more apparent, and to the extent that those skilled in the art can practice the invention in light of the foregoing description, and to make the above and other objects, features, and advantages of the present invention more comprehensible, specific embodiments thereof are described below by way of example.
While specific embodiments of the invention are shown in the drawings, it should be understood that the invention may be embodied in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
It should be noted that certain terms are used throughout the description and claims to refer to particular components. As one skilled in the art will appreciate, various names may be used to refer to a component. This specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. The description which follows is a preferred embodiment of the invention, but is made for the purpose of illustrating the general principles of the invention and not for the purpose of limiting the scope of the invention. The scope of the present invention is defined by the appended claims.
For the convenience of understanding the embodiments of the present invention, the following detailed description will be given by way of example with reference to the accompanying drawings, and the drawings are not intended to limit the embodiments of the present invention.
For better understanding, as shown in fig. 1 and 2, a quick commutation device for an on-load tap changer based on hydraulic transmission comprises an auxiliary element 1, an energy storage element 2 and a switching element 3;
the auxiliary element 1 comprises a control box 10, an oil tank 11, a coarse filter 12, a motor 13, a hydraulic pump 14, a fine filter 15, a first pressure gauge 16, an overflow valve 17, a throttle valve 18, a two-position two-way solenoid valve 19, a three-position four-way solenoid valve 110, a hydraulic oil pipe 120 and a system bracket 130; the oil tank 11 is arranged on the system support 130, the outlet of the oil tank 11 is connected with the coarse filter 12, the coarse filter 12 is connected with the fine filter 15, the fine filter 15 is connected with the inlet of the hydraulic pump 14, and the hydraulic pump 14 is connected with the motor 13.
The connections of the auxiliary element 1, the energy storage element 2 and the switching element 3 are all connected through the hydraulic oil pipe 120.
The energy storage element 2 comprises an air bag type energy accumulator 21, a second pressure gauge 210 is installed on the air bag type energy accumulator 21, and when energy is stored, whether the system stores energy or not is determined according to the numerical value of the second pressure gauge 210 on the air bag type energy accumulator 21.
The switching element 3 comprises a rack-and-pinion type hydraulic swing cylinder 31, the rack-and-pinion type hydraulic swing cylinder 31 is connected with a three-position four-way electromagnetic valve 110 through a hydraulic oil pipe 120, when energy is released, the three-position four-way electromagnetic valve 110 is switched to a passage state, hydraulic oil extruded by the airbag type energy accumulator 21 flows to the rack-and-pinion type hydraulic swing cylinder 31 through the hydraulic oil pipe 120, and therefore the rack-and-pinion type hydraulic swing cylinder 31 is driven to realize reversing action.
The outlet of the hydraulic pump 14 is connected with a three-position four-way electromagnetic valve 110 through a hydraulic oil pipe 120, and the three-position four-way electromagnetic valve 110 is connected with a gas bag type energy accumulator 21 and a rack and pinion type hydraulic swing cylinder 31. A first pressure gauge 16, an overflow valve 17, a throttle valve 18 and a two-position two-way electromagnetic valve 19 are sequentially arranged on a hydraulic oil pipe 120 between the outlet of the hydraulic pump 14 and the airbag type accumulator 21.
In a preferred embodiment of the present invention, the auxiliary element 1, the energy storage element 2 and the switching element 3 are all fixed to the system bracket 130.
In the preferred embodiment of the rapid reversing device for the on-load tap changer based on hydraulic transmission, the second pressure gauge 210, the two-position two-way electromagnetic valve 19 and the three-position four-way electromagnetic valve 110 on the airbag type energy accumulator 21 are all connected with the control box 10, and when a system stores energy and releases energy, the opening and closing of the two-position two-way electromagnetic valve 19 and the three-position four-way electromagnetic valve 110 are controlled through the control action of the control box 10 according to the numerical value of the second pressure gauge 210.
The motor 13, the second pressure gauge 210, the two-position two-way solenoid valve 19 and the three-position four-way solenoid valve 110 are all connected with the control box 10.
In the preferred embodiment of the rapid reversing device for the on-load tap-changer based on hydraulic transmission, when a system stores energy, the control box 10 controls the two-position two-way solenoid valve 19 to be in a closed state, the control box 10 controls the three-position four-way solenoid valve 110 to be in a closed state, the motor 13 drives the hydraulic pump 14 to charge hydraulic oil into the air bag type energy accumulator 21 to squeeze an air bag in the air bag type energy accumulator 21 to start energy storage, when the stored energy is met through the second pressure gauge 210 on the air bag type energy accumulator 21, the control box 10 controls the two-position two-way solenoid valve 19 to be switched to the closed state, the three-position four-way solenoid valve 110 is not changed in the closed state, and the energy storage element 2 is in an energy storage ending state.
In the preferred embodiment of the rapid reversing method for the on-load tap-changer based on hydraulic transmission, when the system releases energy, the two-position two-way electromagnetic valve 19 keeps a closed state, the control box 10 controls the three-position four-way electromagnetic valve 110 to be switched to a passage state, the air bag in the air bag type energy accumulator 21 presses hydraulic oil to the rack and pinion type hydraulic oscillating cylinder 31, and when the rack and pinion type hydraulic oscillating cylinder 31 oscillates to a desired position, the control box 10 controls the three-position four-way electromagnetic valve 110 to be switched to the closed state, so that the energy releasing process of the energy storage element 2 and the reversing process of the switching element 3 are completed.
In a preferred embodiment of the present invention, in the rack and pinion type hydraulic oscillating cylinder 31, a sensor 32 is installed, the sensor 32 is connected to the control box 10, when the rack and pinion type hydraulic oscillating cylinder 31 oscillates to a predetermined position, the sensor 32 senses and transmits to the control box 10, and the control box 10 controls the three-position four-way solenoid valve 110 to switch to a closed state.
In a preferred embodiment of the rapid reversing method for the on-load tap changer based on hydraulic transmission, nitrogen is filled in the air bag type accumulator 21.
Referring to fig. 3, a fast commutation method for an on-load tap changer based on hydraulic transmission is as follows: the energy storage system mainly comprises a system energy storage process and a system energy release process, wherein in the system energy storage process, a control box 10 controls a two-position two-way electromagnetic valve 19 to be in a closed state, the control box 10 controls a three-position four-way electromagnetic valve 110 to be in a closed state, a motor 13 rotates to drive a hydraulic pump 14 to flush hydraulic oil into an air bag type energy accumulator 21, the hydraulic oil flushed into the air bag type energy accumulator 21 extrudes an air bag in the air bag type energy accumulator 21, the air bag compresses to store energy, according to a pressure gauge on the air bag type energy accumulator 21, the system can judge whether the energy storage of the air bag type energy accumulator 21 is finished, when the system judges that the energy storage of the air bag type energy accumulator 21 is finished, the control box 10 controls the two-position two-way electromagnetic valve 19 to be switched to the closed state, the three-position four-way electromagnetic valve 110 keeps the closed state unchanged, and the system is in a pressure maintaining state; in the process of releasing energy of the system, the control box 10 controls the three-position four-way electromagnetic valve 110 to be switched to a passage state, the two-position two-way electromagnetic valve 19 is in a closed state and is unchanged, the air bags in the air bag type energy accumulators 21 expand to release energy to extrude hydraulic oil out of the air bag type energy accumulators 21, the extruded hydraulic oil reaches the rack and pinion hydraulic swing cylinder 31 through the three-position four-way electromagnetic valve 110 to drive the rack and pinion hydraulic swing cylinder 31 to rotate to achieve a reversing function, a sensor 32 is arranged in the rack and pinion hydraulic swing cylinder 31 and connected with the control box 10, when the rack and pinion hydraulic swing cylinder 31 swings to a preset position, the sensor 32 senses and transmits the sensed hydraulic oil to the control box 10, and the control box 10 controls the three-position four-way electromagnetic valve 110 to be switched to the closed state to complete reversing action. The three-position four-way electromagnetic valve 110 has two states when being communicated, so that the forward and reverse reversing function of the rack and pinion type hydraulic swing cylinder 31 can be realized.
The device adopts the air bag type energy accumulator to store energy, and the overflow valve is used for ensuring that enough energy is stored in the air bag type energy accumulator (the overflow valve is opened to release the pressure only when the energy stored in the air bag type energy accumulator meets the requirement), so that the pressure in the air bag type energy accumulator can always meet the pressure requirement required by the rack and pinion type hydraulic swing cylinder, and the problem of insufficient energy storage caused by long-time use of a spring and reduction of the rigidity of the spring can be avoided.
Although the embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to the above-described embodiments and application fields, and the above-described embodiments are illustrative, instructive, and not restrictive. Those skilled in the art, having the benefit of this disclosure, may effect numerous modifications thereto without departing from the scope of the invention as defined by the appended claims.
Claims (7)
1. A quick reversing device for an on-load tap-changer based on hydraulic transmission is characterized by comprising an auxiliary element (1), a gas bag type energy accumulator (21) and a rack and pinion type hydraulic swing cylinder (31);
the auxiliary element (1) comprises an oil tank (11) and a three-position four-way electromagnetic valve (110), the oil tank (11) is connected with the three-position four-way electromagnetic valve (110) through an overflow valve (17), and the three-position four-way electromagnetic valve (110) is connected with a gas bag type energy accumulator (21) and a rack and pinion type hydraulic swing cylinder (31);
a coarse filter (12), a fine filter (15) and a hydraulic pump (14) are arranged on a pipeline between the outlet of the oil tank (11) and the three-position four-way electromagnetic valve (110);
a first pressure gauge (16), a throttle valve (18) and a two-position two-way electromagnetic valve (19) are sequentially arranged between the hydraulic pump (14) and the three-position four-way electromagnetic valve (110);
when energy is stored, the two-position two-way electromagnetic valve (19) is in a closed state, the three-position four-way electromagnetic valve (110) is in a closed state, hydraulic oil is filled into the air bag type energy accumulator (21) by the hydraulic pump (14) to extrude an air bag in the air bag type energy accumulator (21) to start energy storage, when the stored energy is met, the two-position two-way electromagnetic valve (19) is switched to the closed state, and the energy storage element (2) is in an energy storage ending state;
when energy is released, the two-position two-way electromagnetic valve (19) is in a closed circuit state, the three-position four-way electromagnetic valve (110) is switched to a passage state, the air bag in the air bag type energy accumulator (21) extrudes hydraulic oil to the rack and pinion type hydraulic swing cylinder (31), and when the rack and pinion type hydraulic swing cylinder (31) swings to an expected position, the three-position four-way electromagnetic valve (110) is switched to the closed circuit state, so that the energy release process of the energy storage element (2) and the reversing process of the rack and pinion type hydraulic swing cylinder (31) are completed.
2. A fast commutation device for on-load tap changers based on hydraulic transmission according to claim 1, characterised in that the hydraulic pump (14) is connected with an electric motor (13).
3. The rapid reversing device for the on-load tap-changer based on the hydraulic transmission is characterized in that a second pressure gauge (210) is arranged on the air bag type accumulator (21); the air bag in the bag type energy accumulator (21) is filled with nitrogen.
4. The quick-change device for on-load tap-changers based on hydraulic transmission according to claim 1 is characterized in that the auxiliary element (1), the gas-bag accumulator (21) and the rack and pinion hydraulic swing cylinder (31) are arranged on the system support (130).
5. The quick reversing device for the on-load tap-changer based on the hydraulic transmission is characterized in that the auxiliary element (1) further comprises a control box (10), and the motor (13), the second pressure gauge (210), the two-position two-way solenoid valve (19) and the three-position four-way solenoid valve (110) are connected with the control box (10).
6. A quick-change device for on-load tap-changers based on hydraulic transmission according to claim 5, characterized in that the rack and pinion hydraulic oscillating cylinder (31) is provided with a sensor (32), which sensor (32) is connected to the control box (10).
7. A method for rapid commutation of a hydraulic drive for an on-load tap changer based on the device according to claim 1,
when the system stores energy, the two-position two-way electromagnetic valve (19) is in a closed state, the three-position four-way electromagnetic valve (110) is in a closed state, hydraulic oil is flushed into the air bag type energy accumulator (21) by the hydraulic pump (14), the hydraulic oil flushed into the air bag type energy accumulator (21) extrudes an air bag in the air bag type energy accumulator (21), the air bag is compressed to store energy, and when the air bag type energy accumulator (21) stores energy, the two-position two-way electromagnetic valve (19) is switched to the closed state;
when energy is released, the three-position four-way electromagnetic valve (110) is switched to be in a passage state, the two-position two-way electromagnetic valve (19) is in a closed state, the air bag in the air bag type energy accumulator (21) expands to release energy, hydraulic oil is extruded out of the air bag type energy accumulator (21), the extruded hydraulic oil reaches the rack and pinion type hydraulic swing cylinder (31) through the three-position four-way electromagnetic valve (110), the rack and pinion type hydraulic swing cylinder (31) is driven to rotate to achieve a reversing function, and when the rack and pinion type hydraulic swing cylinder (31) swings to a preset position, the three-position four-way electromagnetic valve (110) is switched to be in the closed state, so that reversing action is completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110350588.3A CN113096980B (en) | 2021-03-31 | 2021-03-31 | Quick reversing device and method for on-load tap-changer based on hydraulic transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110350588.3A CN113096980B (en) | 2021-03-31 | 2021-03-31 | Quick reversing device and method for on-load tap-changer based on hydraulic transmission |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113096980A CN113096980A (en) | 2021-07-09 |
| CN113096980B true CN113096980B (en) | 2022-05-20 |
Family
ID=76672086
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110350588.3A Active CN113096980B (en) | 2021-03-31 | 2021-03-31 | Quick reversing device and method for on-load tap-changer based on hydraulic transmission |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113096980B (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101722289A (en) * | 2008-11-01 | 2010-06-09 | 吴为国 | Vacuum centrifugal casting machine |
| CN102062132A (en) * | 2009-11-11 | 2011-05-18 | 比亚迪股份有限公司 | Hydraulic control system |
| CN201907382U (en) * | 2010-12-07 | 2011-07-27 | 湖北三江航天万山特种车辆有限公司 | Independent-steering oil gas suspension system |
| JP2013117273A (en) * | 2011-12-05 | 2013-06-13 | Amada Co Ltd | Solenoid valve driving circuit and solenoid valve driving method |
| CN105134672A (en) * | 2015-09-14 | 2015-12-09 | 浙江大学舟山海洋研究中心 | Heavy-load high-speed hydraulic vibration and impact system |
| CN105714872A (en) * | 2014-08-08 | 2016-06-29 | 北京建筑大学 | Pressure-adjustable and capacity-adjustable hydraulic energy recycling and storing system and working method of hydraulic energy recycling and storing system |
| CN207195332U (en) * | 2017-09-04 | 2018-04-06 | 上海意称液压系统有限公司 | The hydraulic control system of oscillation bearing testing machine |
| CN111207135A (en) * | 2020-03-03 | 2020-05-29 | 江苏师范大学 | Overflow loss recycling system based on hydraulic energy accumulator and four-cavity hydraulic cylinder |
| CN211737629U (en) * | 2020-03-18 | 2020-10-23 | 广东博智林机器人有限公司 | Hydro-pneumatic spring balancing system |
| CN212657061U (en) * | 2020-05-21 | 2021-03-05 | 哈尔滨广瀚新能动力有限公司 | Water inlet and outlet valve control device of hydraulic dynamometer |
-
2021
- 2021-03-31 CN CN202110350588.3A patent/CN113096980B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101722289A (en) * | 2008-11-01 | 2010-06-09 | 吴为国 | Vacuum centrifugal casting machine |
| CN102062132A (en) * | 2009-11-11 | 2011-05-18 | 比亚迪股份有限公司 | Hydraulic control system |
| CN201907382U (en) * | 2010-12-07 | 2011-07-27 | 湖北三江航天万山特种车辆有限公司 | Independent-steering oil gas suspension system |
| JP2013117273A (en) * | 2011-12-05 | 2013-06-13 | Amada Co Ltd | Solenoid valve driving circuit and solenoid valve driving method |
| CN105714872A (en) * | 2014-08-08 | 2016-06-29 | 北京建筑大学 | Pressure-adjustable and capacity-adjustable hydraulic energy recycling and storing system and working method of hydraulic energy recycling and storing system |
| CN105134672A (en) * | 2015-09-14 | 2015-12-09 | 浙江大学舟山海洋研究中心 | Heavy-load high-speed hydraulic vibration and impact system |
| CN207195332U (en) * | 2017-09-04 | 2018-04-06 | 上海意称液压系统有限公司 | The hydraulic control system of oscillation bearing testing machine |
| CN111207135A (en) * | 2020-03-03 | 2020-05-29 | 江苏师范大学 | Overflow loss recycling system based on hydraulic energy accumulator and four-cavity hydraulic cylinder |
| CN211737629U (en) * | 2020-03-18 | 2020-10-23 | 广东博智林机器人有限公司 | Hydro-pneumatic spring balancing system |
| CN212657061U (en) * | 2020-05-21 | 2021-03-05 | 哈尔滨广瀚新能动力有限公司 | Water inlet and outlet valve control device of hydraulic dynamometer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113096980A (en) | 2021-07-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8186155B2 (en) | Hydraulic energy storage system with accumulator and method of varying charge of same | |
| CN101736771B (en) | Rotary decelerating and braking energy recovery system of hydraulic excavator | |
| EP1845055A1 (en) | Working machine of lifting magnet specifications | |
| CN103548105B (en) | There is the tap changer of the vacuum interrupter assembly of the damper of improvement | |
| CN113096980B (en) | Quick reversing device and method for on-load tap-changer based on hydraulic transmission | |
| CN101795926A (en) | Steering device | |
| KR900017833A (en) | Displacement suppression device of mobile crane | |
| CN103548106B (en) | Tap changer having an improved vacuum interrupter actuating assembly | |
| CN103741755A (en) | Excavator energy recovery system | |
| CN101533725B (en) | Electrohydraulic servo operating mechanism of high-voltage circuit breaker | |
| JP2000035126A (en) | Supercharger of capacitor for electrical transmission mechanism | |
| CN210859382U (en) | Vehicle running hydraulic control system and vehicle | |
| CN113113261A (en) | Double-vacuum-tube reciprocating transition circuit of vacuum on-load tap-changer and switching control method thereof | |
| CN112185771A (en) | Automatic switch structure of power circuit breaker and control system thereof | |
| CN115405578A (en) | Micro-angle stepping control method for hydraulic motor | |
| CN208456935U (en) | A kind of novel robot hydraulic knuckle drive system | |
| KR20150140308A (en) | Method for performing a switching process in an on-load tap changer | |
| CN106803675A (en) | Three-phase distribution circuit automatic regulating voltage method of the no-flashy-flow without electric arc gear shift | |
| CN102720879B (en) | Electromagnetic valve, and hydraulic control system of automatic transmission | |
| CN208252457U (en) | Hydraulic control system and tractor | |
| CN203321923U (en) | Electrically-controlled speed change valve of bulldozer | |
| JPH0117001B2 (en) | ||
| CN106803676A (en) | Three-phase distribution circuit automatic regulating voltage method and its equipment of the no-flashy-flow without electric arc gear shift | |
| CN112591681A (en) | Portal rises to rise and hydraulic circuit that potential energy was retrieved | |
| CN2423648Y (en) | Plane scroll spring energy-storage and releasing device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |