CN111649018B - Pump-controlled hydraulic cylinder integrated with external rotor motor - Google Patents
Pump-controlled hydraulic cylinder integrated with external rotor motor Download PDFInfo
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- CN111649018B CN111649018B CN202010498768.1A CN202010498768A CN111649018B CN 111649018 B CN111649018 B CN 111649018B CN 202010498768 A CN202010498768 A CN 202010498768A CN 111649018 B CN111649018 B CN 111649018B
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- oil
- hydraulic cylinder
- pump
- hydraulic
- rotor motor
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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
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
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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
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/042—Controlling the temperature of the fluid
- F15B21/0423—Cooling
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
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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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/60—Circuit components or control therefor
- F15B2211/62—Cooling or heating means
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Power Engineering (AREA)
- Details Of Reciprocating Pumps (AREA)
Abstract
The invention provides a pump control hydraulic cylinder integrated with an outer rotor motor, which comprises the outer rotor motor and a hydraulic circulation system, wherein the hydraulic circulation system comprises a hydraulic cylinder, a two-way oil pump, an oil pipe, a radiator and an oil tank, the hydraulic cylinder is arranged inside a stator of the outer rotor motor, a rodless cavity of the hydraulic cylinder is connected with one oil port of the two-way oil pump through a first oil pipe, a rod cavity of the hydraulic cylinder is connected with the other oil port of the two-way oil pump through a second oil pipe, and a pump shaft of the two-way oil pump is in transmission connection with a rotor of the outer rotor motor. According to the invention, the hydraulic cylinder is arranged in the stator of the outer rotor motor, so that hydraulic oil flows through the interior of the stator, and then the radiator additionally arranged on the second oil pipe is utilized, so that the heat dissipation performance of the outer rotor motor is better, and meanwhile, the volume of the electro-hydraulic combined control system is smaller.
Description
Technical Field
The invention belongs to the technical field of hydraulic systems and external rotor motors, and particularly relates to a pump control hydraulic cylinder integrated with an external rotor motor.
Background
At present, motors can be divided into an inner rotor motor and an outer rotor motor, wherein the inner rotor motor has high rotating speed and small torque; the external rotor motor is opposite to the external rotor motor. In practical application, the outer rotor motor has large torque, high efficiency and simple peripheral equipment, and has irreplaceable effect. However, because the stator of the outer rotor motor is built in, the heat dissipation effect is inferior to that of the inner rotor motor, which causes a hindrance to the application of the outer rotor motor.
Compared with an electric system, the hydraulic system has the advantages of high power, easiness in realizing linear motion and the like. In traditional electric-hydraulic combined control, links such as motor, oil pump, oil tank, all kinds of valves, pneumatic cylinder are indispensable, and the structure is comparatively loaded down with trivial details, and the volume is difficult to compress.
Disclosure of Invention
The invention aims to provide a pump control hydraulic cylinder integrated with an outer rotor motor.
The technical scheme for realizing the purpose of the invention is as follows: the utility model provides an integrated external rotor electric machine's pump accuse pneumatic cylinder, includes external rotor electric machine and hydraulic circulation system, hydraulic circulation system includes pneumatic cylinder, two-way oil pump, oil pipe, radiator and oil tank, the pneumatic cylinder sets up inside the stator of external rotor electric machine, one of them hydraulic fluid port of rodless chamber and two-way oil pump of pneumatic cylinder passes through first oil pipe and is connected, another hydraulic fluid port that has the pole chamber and two-way oil pump of pneumatic cylinder passes through second oil pipe and is connected, the pump shaft of two-way oil pump is connected with the rotor drive of external rotor electric machine.
Preferably, a radiator and an oil tank are arranged on the second oil pipe.
Preferably, the bidirectional oil pump is fixed at one end of the outer rotor motor, which is provided with a rodless cavity of the hydraulic cylinder.
Preferably, the hydraulic cylinder is arranged in a hollow hole inside the stator, and the outer diameter of the hydraulic cylinder is the same as the inner diameter of the hollow hole.
Compared with the prior art, the invention has the following remarkable advantages: according to the invention, the hydraulic cylinder is arranged in the stator of the outer rotor motor, so that hydraulic oil flows through the interior of the stator, and then the radiator additionally arranged on the second oil pipe is utilized, so that the heat dissipation performance of the outer rotor motor is better, and meanwhile, the volume of the electro-hydraulic combined control system is smaller.
Drawings
Fig. 1 is a schematic diagram of a pump-controlled hydraulic cylinder of an integrated external rotor motor according to the present invention.
Fig. 2 is a three-dimensional schematic diagram of a pump-controlled hydraulic cylinder of the integrated external rotor motor.
Fig. 3 is a three-dimensional schematic diagram of a pump-controlled hydraulic cylinder of the integrated external rotor motor.
Fig. 4 is a gear transmission diagram of the pump control hydraulic cylinder of the integrated external rotor motor.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
As shown in fig. 1 to 3, a pump-controlled hydraulic cylinder integrated with an external rotor motor comprises an external rotor motor 1 and a hydraulic circulation system 2; the outer rotor motor 1 comprises a motor rotor 11, a motor stator 12 and a rolling bearing 13; the hydraulic circulation system 2 comprises a hydraulic cylinder 21, a two-way oil pump 22, an oil pipe 23, a radiator 24 and an oil tank 25; the hydraulic cylinder 21 is arranged inside the stator 12 of the outer rotor motor 1, a rodless cavity of the hydraulic cylinder 21 is connected with one oil port of the bidirectional oil pump 22 through a first oil pipe 26, a rod cavity of the hydraulic cylinder 21 is connected with the other oil port of the bidirectional oil pump 22 through a second oil pipe 23, and a pump shaft of the bidirectional oil pump 22 is in transmission connection with a rotor of the outer rotor motor 1.
During specific installation, the axial relative position of the stator 12 of the motor and the hydraulic cylinder 21 can be freely selected, and the operation of the mechanism is not influenced. For the convenience of subsequent component installation, the left end face of the motor stator 12 and the left end face of the hydraulic cylinder 21, namely the rodless side, are selected to be installed in a superposition mode. In actual operation, the motor stator 12 is fixedly connected with the cylinder body of the hydraulic cylinder 21, and no relative movement exists.
In a further embodiment, a radiator 24 and an oil tank 25 are provided in the second oil pipe 23.
In a further embodiment, the bidirectional oil pump 22 is fixed at one end of the external rotor motor 1 where the rodless chamber of the hydraulic cylinder 21 is provided. To ensure normal transmission, the pump body of the bidirectional oil pump 22 and the stator of the motor should be kept relatively static. In actual installation, a connecting rod can be used to fixedly connect the pump body of the bidirectional oil pump 22 with the motor stator 12.
In a further embodiment, the hydraulic cylinder 21 is disposed in a hollow bore inside the stator 12, and the outer diameter of the hydraulic cylinder 21 is the same as the inner diameter of the hollow bore.
In a further embodiment, a radiator 24 and an oil tank 25 are provided in the second oil pipe 23.
In a further embodiment, as shown in fig. 4, the motor rotor 12 of the outer rotor motor 1 is provided with internal teeth on one side of the rodless cavity of the hydraulic cylinder 21, the pump shaft of the bidirectional oil pump 22 is provided with a gear, the internal teeth of the motor rotor 12 are meshed with the transmission gear 3, and the transmission gear 3 is further meshed with the gear on the pump shaft, so that transmission from the outer rotor motor 1 to the bidirectional oil pump 22 is realized.
The working process of the invention is as follows: the motor stator 12, the cylinder body of the hydraulic cylinder 21, the pump body of the bidirectional oil pump 22, the radiator 24, and the oil tank 25 are all fixed. When the outer rotor motor 1 works, the motor rotor 11 rotates around the motor stator 12, and the rotation of the motor rotor is transmitted to the pump shaft of the bidirectional oil pump 22 through the transmission gear 3 to drive the bidirectional oil pump 22 to operate. In the push rod circulation, the two-way oil pump 22 sends hydraulic oil to the rodless cavity of the hydraulic cylinder 21 through the first oil pipe 26, the hydraulic oil pushes the piston and the rod to move rightwards, so that the volume of the rod cavity is reduced, the hydraulic oil in the rod cavity enters the oil tank 25 along the second oil pipe 23, then enters the radiator 24 from the oil tank 25, and then returns to the two-way oil pump 22 from the radiator 24 to form a circulation; in the pull rod circulation, the two-way oil pump 22 sends hydraulic oil to the radiator 24 through the second oil pipe 23, then the hydraulic oil enters the oil tank 25 from the radiator 24, and then enters the rod cavity of the hydraulic cylinder 21 from the oil tank 25, the hydraulic oil in the rod cavity is increased, the piston and the rod are pushed to move leftwards, at this time, the volume of the rodless cavity is reduced, the hydraulic oil in the rodless cavity is pushed back to the two-way oil pump 22 along the first oil pipe 26, a circulation is formed, and finally the reciprocating motion of the push rod of the hydraulic cylinder 21 is realized.
When the rotor 11 of the outer rotor motor 1 rotates clockwise, the transmission gear 3 rotates clockwise, the pump shaft of the bidirectional oil pump 22 rotates anticlockwise, hydraulic oil flows into the rod cavity from the bidirectional oil pump 22 through the second oil pipe 23, and the push rod retracts; when the rotor 11 of the outer rotor motor 1 rotates anticlockwise, the transmission gear 3 rotates anticlockwise, the pump shaft of the bidirectional oil pump 22 rotates clockwise, hydraulic oil flows into the rodless cavity from the bidirectional oil pump 22 through the first oil pipe 23, and the push rod extends. Obviously, the faster the outer rotor motor 1 rotates, the faster the push rod of the hydraulic cylinder 21 moves.
In addition, as the hydraulic circulating system 2 flows through the interior of the motor stator 12, the hydraulic oil cooled by the radiator 24 can carry out the heat generated by the motor stator 12 through the circulation of the hydraulic oil, and the problem of difficult heat dissipation of the outer rotor motor 1 is effectively solved.
Compared with the prior art, the external rotor motor has the advantages of better heat dissipation performance, simpler electro-hydraulic combined control system, smaller volume and better robustness.
The invention combines the outer rotor motor with the hydraulic system, abandons part of hydraulic structure, directly connects the hydraulic pump with the hydraulic cylinder through the oil pipe, the radiator and the oil tank, and is driven by the motor to form a circulating system. The system adopts the outer rotor motor, combines the motor stator and the hydraulic cylinder, and greatly saves space. Meanwhile, hydraulic oil flows through the motor stator in the circulation process and is matched with a radiator additionally arranged on an external oil pipe, so that the problem of stator heat dissipation of the outer rotor motor is solved.
The preferred embodiments of the present invention have been described in detail, but the present invention is not limited to the details of the above embodiments, and various equivalent changes can be made to the technical solution of the present invention within the technical spirit of the present invention.
Claims (2)
1. The pump control hydraulic cylinder is characterized by comprising an outer rotor motor (1) and a hydraulic circulation system (2), wherein the hydraulic circulation system (2) comprises a hydraulic cylinder (21), a two-way oil pump (22), a second oil pipe (23), a radiator (24), an oil tank (25) and a first oil pipe (26), the hydraulic cylinder (21) is arranged inside a stator (12) of the outer rotor motor (1), a rodless cavity of the hydraulic cylinder (21) is connected with one oil port of the two-way oil pump (22) through the first oil pipe (26), a rod cavity of the hydraulic cylinder (21) is connected with the other oil port of the two-way oil pump (22) through the second oil pipe (23), and a pump shaft of the two-way oil pump (22) is in transmission connection with a rotor of the outer rotor motor (1);
a radiator (24) and an oil tank (25) are arranged on the second oil pipe (23);
the bidirectional oil pump (22) is fixed at one end of the outer rotor motor (1) provided with a rodless cavity of the hydraulic cylinder (21);
the inner teeth of a motor rotor (11) of the outer rotor motor (1) are arranged on one side of a rodless cavity of the hydraulic cylinder (21), a gear is arranged on a pump shaft of the bidirectional oil pump (22), the inner teeth of the motor rotor (11) are meshed with the transmission gear (3), and the transmission gear (3) is meshed with the gear on the pump shaft, so that the transmission from the outer rotor motor (1) to the bidirectional oil pump (22) is realized;
when the outer rotor motor (1) works, the motor rotor (11) rotates around the motor stator (12), and the rotation of the motor rotor is transmitted to a pump shaft of the bidirectional oil pump (22) through the transmission gear (3) to drive the bidirectional oil pump (22) to operate; in the push rod circulation, the two-way oil pump (22) sends hydraulic oil to a rodless cavity of the hydraulic cylinder (21) through the first oil pipe (26), the hydraulic oil pushes the piston and the rod to move rightwards, so that the volume of the rod cavity is reduced, the hydraulic oil in the rod cavity enters the oil tank (25) along the second oil pipe (23), then enters the radiator (24) from the oil tank (25), and then returns to the two-way oil pump (22) through the radiator (24) to form circulation; in the pull rod circulation, the two-way oil pump (22) sends hydraulic oil to the radiator (24) through the second oil pipe (23), then the hydraulic oil enters the oil tank (25) from the radiator (24), and then enters the rod cavity of the hydraulic cylinder (21) from the oil tank (25), the hydraulic oil in the rod cavity is increased, the piston and the rod are pushed to move leftwards, at the moment, the volume of the rodless cavity is reduced, the hydraulic oil in the rodless cavity is pushed back to the two-way oil pump (22) along the first oil pipe (26), a circulation is formed, and finally the reciprocating motion of the push rod of the hydraulic cylinder (21) is realized.
2. The pump-controlled hydraulic cylinder of an integrated external rotor motor according to claim 1, wherein the hydraulic cylinder (21) is disposed in a hollow hole inside the stator (12), and the outer diameter of the hydraulic cylinder (21) is the same as the inner diameter of the hollow hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010498768.1A CN111649018B (en) | 2020-06-04 | 2020-06-04 | Pump-controlled hydraulic cylinder integrated with external rotor motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010498768.1A CN111649018B (en) | 2020-06-04 | 2020-06-04 | Pump-controlled hydraulic cylinder integrated with external rotor motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111649018A CN111649018A (en) | 2020-09-11 |
| CN111649018B true CN111649018B (en) | 2022-02-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010498768.1A Active CN111649018B (en) | 2020-06-04 | 2020-06-04 | Pump-controlled hydraulic cylinder integrated with external rotor motor |
Country Status (1)
| Country | Link |
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| CN (1) | CN111649018B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115183046A (en) * | 2022-09-13 | 2022-10-14 | 浙江大学高端装备研究院 | Compact electro-hydraulic drive actuator |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1847070A (en) * | 2005-04-11 | 2006-10-18 | 株式会社日立制作所 | Power steering apparatus |
| CN205918969U (en) * | 2016-06-30 | 2017-02-01 | 张家港市艾罗执行器有限公司 | Gear pump control formula electro -hydraulic linkage actuating mechanism |
| CN207145489U (en) * | 2017-08-29 | 2018-03-27 | 比亚迪股份有限公司 | Disk brake and vehicle |
| CN108506251A (en) * | 2018-03-05 | 2018-09-07 | 北京航空航天大学 | The Electrical hydrostatic actuator of asymmetric pump control asymmetrical cylinder |
| CN109139584A (en) * | 2018-11-05 | 2019-01-04 | 深圳航天科技创新研究院 | Pump valve multiplex control system and method |
| CN109424665A (en) * | 2017-08-29 | 2019-03-05 | 比亚迪股份有限公司 | Disk brake and vehicle |
| CN109424667A (en) * | 2017-08-29 | 2019-03-05 | 比亚迪股份有限公司 | Disk brake and vehicle |
| CN109424670A (en) * | 2017-08-29 | 2019-03-05 | 比亚迪股份有限公司 | Disk brake and vehicle |
| CN209100381U (en) * | 2018-11-05 | 2019-07-12 | 深圳航天科技创新研究院 | Pump valve integrates flow control module |
-
2020
- 2020-06-04 CN CN202010498768.1A patent/CN111649018B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1847070A (en) * | 2005-04-11 | 2006-10-18 | 株式会社日立制作所 | Power steering apparatus |
| CN205918969U (en) * | 2016-06-30 | 2017-02-01 | 张家港市艾罗执行器有限公司 | Gear pump control formula electro -hydraulic linkage actuating mechanism |
| CN207145489U (en) * | 2017-08-29 | 2018-03-27 | 比亚迪股份有限公司 | Disk brake and vehicle |
| CN109424665A (en) * | 2017-08-29 | 2019-03-05 | 比亚迪股份有限公司 | Disk brake and vehicle |
| CN109424667A (en) * | 2017-08-29 | 2019-03-05 | 比亚迪股份有限公司 | Disk brake and vehicle |
| CN109424670A (en) * | 2017-08-29 | 2019-03-05 | 比亚迪股份有限公司 | Disk brake and vehicle |
| CN108506251A (en) * | 2018-03-05 | 2018-09-07 | 北京航空航天大学 | The Electrical hydrostatic actuator of asymmetric pump control asymmetrical cylinder |
| CN109139584A (en) * | 2018-11-05 | 2019-01-04 | 深圳航天科技创新研究院 | Pump valve multiplex control system and method |
| CN209100381U (en) * | 2018-11-05 | 2019-07-12 | 深圳航天科技创新研究院 | Pump valve integrates flow control module |
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| CN111649018A (en) | 2020-09-11 |
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