CN212155076U - High-power-density moving-coil type electromagnetic direct-drive hydraulic pump - Google Patents
High-power-density moving-coil type electromagnetic direct-drive hydraulic pump Download PDFInfo
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- CN212155076U CN212155076U CN202020650189.XU CN202020650189U CN212155076U CN 212155076 U CN212155076 U CN 212155076U CN 202020650189 U CN202020650189 U CN 202020650189U CN 212155076 U CN212155076 U CN 212155076U
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Abstract
The utility model relates to a high power density moving coil formula electromagnetism directly drives hydraulic pump, including yoke, permanent magnet array, end cover, hydraulic cylinder body, valve body, coil skeleton, coil, piston, centering spring and check valve, its characterized in that: double Halbach permanent magnet array layers which are alternately and closely arranged by axial magnetizing permanent magnets and radial magnetizing permanent magnets are respectively attached to the outer side of an inner yoke and the inner side of an outer yoke, an air gap is formed between the double Halbach permanent magnet array layers, and the yoke is fixedly connected with an end cover and a hydraulic cylinder body to serve as a stator; the coil group is wound on the framework and is arranged in the air gap, the winding directions of adjacent coils are opposite, the framework is integrated with the pistons of the two hydraulic cylinders, the pistons are directly driven to reciprocate, and the liquid pumping is completed in the two hydraulic cylinders to act as the actuators; the centering spring, the hydraulic pump rotor and the hydraulic pump stator form a resonance system together, and the centering spring is always in a compressed state; the working efficiency and the power density of the hydraulic pump are effectively improved by adopting the technologies of electromagnetic direct drive, double Halbach permanent magnet array layers, symmetrical working cavities, centering springs and the like.
Description
Technical Field
The utility model relates to a hydraulic pump technical field especially relates to an electromagnetism directly drives hydraulic pump.
Background
Compared with other types of hydraulic pumps, the plunger pump has the advantages of high rated pressure, compact structure, high efficiency, convenient flow regulation and the like, and is widely applied to the fields of high-pressure, large-flow and variable-flow hydraulic automatic robots, engineering machinery, aviation hydraulic actuators and the like. At present, the most commonly used plunger pump is generally a swash plate type plunger pump, and has the defects of complex structure, more friction pairs, low power density, poorer heat dissipation condition and insufficient dynamic response performance, thereby limiting the further expansion of the application field of the plunger pump.
Along with the improvement of the control precision of the linear motor, the appearance of novel permanent magnet materials and the improvement of the processing precision, the linear motors with different structural forms, different working principles and different application occasions are in endless range, meanwhile, the driving force of the linear motor is continuously increased, but the driving pressure of the linear motor is still different compared with that of a hydraulic pump. The linear motor is adopted to directly drive the piston of the plunger pump, so that a motion conversion mechanism from rotation to linear, such as a swash plate, is eliminated, the internal leakage of the plunger pump is effectively reduced, and the efficient electromagnetic direct drive is realized to become an important trend of the development of the plunger pump. However, a direct-drive motor of a general electromagnetic direct-drive plunger pump is fixedly connected with a piston through an extension rod outside a pump body, so that the electromagnetic direct-drive plunger pump is large in size, low in power density, slow in response speed and low in flow control precision, and the technical development of a linear direct-drive hydraulic pump is limited.
The utility model discloses a high power density moving coil formula electromagnetism directly drives hydraulic pump, adopt the linear electric motor of two Halbach permanent magnet arrays, the alternative pump that the active cell direct drive pneumatic cylinder piston reciprocating motion accomplished liquid simultaneously pumps in two pneumatic cylinders pumps, pump the process hydraulic pump active cell and the hydraulic pump stator constitutes resonant system under centering spring action, the axial length of coil is greater than radial permanent magnet length, guarantee to pump linear electric motor output power in the stroke, improve the power density that the electromagnetism directly drives the plunger pump under the prerequisite of volume reduction and structure simplification, response speed, control accuracy.
Disclosure of Invention
The high-power-density moving-coil type electromagnetic direct-drive hydraulic pump aims to design a linear motor with double Halbach permanent magnet arrays, a rotor directly drives a hydraulic cylinder piston to reciprocate and finishes alternate pumping of liquid in two hydraulic cylinders simultaneously, a hydraulic pump rotor and a hydraulic pump stator form a resonance system under the action of a centering spring in the pumping process, the axial length of a coil is larger than the length of a radial permanent magnet, the output force of the linear motor in the pumping stroke is ensured, and the power density, the response speed and the control precision of an electromagnetic direct-drive plunger pump are improved on the premise of volume reduction and structure simplification.
The utility model provides a high power density moving coil formula electromagnetism directly drives hydraulic pump, includes hydraulic cylinder body (1), piston (2), connecting plate (3), end cover (4), outer yoke (5), outer permanent magnet array (6), coil (7), coil skeleton (8), interior permanent magnet array (9), inner yoke (10), centering spring (11), valve body (12), play liquid valve (13) and feed liquor valve (14), its characteristic includes: the outer permanent magnet array (6) and the inner permanent magnet array (9) are Halbach permanent magnet array layers formed by alternately and closely arranging axial magnetizing permanent magnets and radial magnetizing permanent magnets, and the inner permanent magnet array (9) and the outer permanent magnet array (6) are respectively attached to the outer side of the inner yoke (10) and the inner side of the outer yoke (5); the inner yoke (10) and the outer yoke (5) are coaxially fixed through the end cover (4), and an air gap is formed between the inner yoke and the outer yoke; the outer yoke (5) is coaxially and fixedly connected with the end cover (4) and the hydraulic cylinder body (1), and the hydraulic cylinder body (1) is fixedly connected with the valve body (12) to serve as a stator; the coil (7) is wound in the groove of the coil framework (8) and can do reciprocating linear motion in the air gap; the coil framework (8) is respectively and coaxially fixedly connected with the two pistons (2) through the two connecting plates (3), and the pistons (2) can reciprocate in an inner cavity (Q) formed by the hydraulic cylinder body (1) and the end cover (4) to serve as an actuator; the coil (7) consists of a forward winding coil and a reverse winding coil, and the winding directions of the coils of adjacent windings are opposite, wherein the number of the forward windings is m, the number of the reverse windings is n, m and n are positive integers, and m = n or m-n = +/-1; the number of the radially magnetized permanent magnets in the outer permanent magnet array (6) and the number of the axially magnetized permanent magnets in the inner permanent magnet array (9) are equal and are (m + n), and the number of the axially magnetized permanent magnets is equal and are (m + n + 1); the centering spring (11) is arranged in a groove formed by the inner yoke (10) and the end cover (4) together, a hydraulic pump rotor and a hydraulic pump stator of the centering spring (11) form a resonance system together, and the centering spring (11) is always in a compression state.
The liquid outlet valve (13) and the liquid inlet valve (14) are passive one-way valves, the number of the liquid outlet valve (13) and the number of the liquid inlet valve (14) which are arranged on the same valve body (12) are not less than 1, and the end surfaces of the installation ends of the liquid outlet valve (13) and the liquid inlet valve (14) and the inner end surface of the Q cavity end of the hydraulic cylinder body (1) are in the same plane.
The hydraulic pump rotor reciprocates to directly drive the two pistons (2) to alternately pump liquid in the two symmetrical Q cavities, and the liquid is transmitted in one direction by combining the flow distribution of the liquid outlet valve (13) and the liquid inlet valve (14).
The current in the coil (7) is controlled by a controller, and the amplitude, the frequency and the motion curve of the motion of the rotor of the hydraulic pump are adjusted by controlling the current, so that the control of output fluid is realized.
The axial lengths of the forward winding coil and the reverse winding coil of the coil (7) are equal and are L1; the length of the radially magnetized permanent magnet in the outer permanent magnet array (6) and the inner permanent magnet array (9) is L2; the stroke of the hydraulic pump mover is S, and L1 is more than or equal to (L2 + S).
The connecting plate (3), the end cover (4) and the coil framework (8) are made of magnetism isolating materials, and the inner yoke (10) and the outer yoke (5) are made of soft magnetic materials.
The diameter of the piston (2) is not less than that of the coil framework (8).
The utility model discloses a high power density moving coil formula electromagnetism directly drives hydraulic pump, adopt the linear electric motor of two Halbach permanent magnet arrays, the alternative pump that the active cell direct drive pneumatic cylinder piston reciprocating motion accomplished liquid simultaneously pumps in two pneumatic cylinders pumps, pump the process hydraulic pump active cell and the hydraulic pump stator constitutes resonant system under centering spring action, the axial length of coil is greater than radial permanent magnet length, guarantee to pump linear electric motor output power in the stroke, improve the power density that the electromagnetism directly drives the plunger pump under the prerequisite of volume reduction and structure simplification, response speed, control accuracy.
The utility model discloses a high power density moving coil type electromagnetism directly drives hydraulic pump, its linear electric motor moving coil directly drives the pneumatic cylinder piston and has cancelled the motion conversion equipment, and the power transmission route shortens, compact structure, efficiency improvement; the Halbach permanent magnet arrays are arranged on the outer permanent magnet array and the inner permanent magnet array of the linear motor, so that the air gap magnetic field intensity is enhanced, the driving force and the response speed of the linear motor are improved, and the structural compactness of the motor is further improved.
The utility model discloses a high power density moving coil formula electromagnetism directly drives hydraulic pump, two pistons of linear electric motor active cell reciprocating motion direct drive pump suction liquid in turn respectively in two pneumatic cylinders, through the joining in marriage of going out liquid valve and feed liquor valve and flow, accomplish the one-way transmission of liquid, the reciprocal in-process of piston all externally exports the fluid, and power density effectively improves.
The utility model discloses a high power density moving coil formula electromagnetism directly drives hydraulic pump, centering spring hydraulic pump active cell together constitute resonance system with the hydraulic pump stator, make its power density obtain further promotion.
The utility model discloses a high power density moving coil formula electromagnetism directly drives hydraulic pump, the axial length of winding coil is greater than radial permanent magnet length for radial magnetic field can both be effectively utilized in whole pump oil stroke, also is favorable to the improvement of hydraulic pump power density.
The utility model discloses a high power density moving coil formula electromagnetism directly drives hydraulic pump has advantages such as compact structure, response rapidly, power density height, will bring huge economic benefits after the input industrialization is used.
Drawings
Fig. 1 is the utility model discloses a high power density moving coil formula electromagnetism directly drives hydraulic pump schematic structure.
Fig. 2 is the utility model discloses a high power density moving coil formula electromagnetism directly drives hydraulic pump connecting plate axial view.
Fig. 3 is the utility model discloses a high power density moving coil formula electromagnetism directly drives hydraulic pump coil skeleton three-dimensional map.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1 to 3, a high power density moving coil formula electromagnetism directly drives hydraulic pump, including hydraulic cylinder body (1), piston (2), connecting plate (3), end cover (4), outer yoke (5), outer permanent magnet array (6), coil (7), coil skeleton (8), interior permanent magnet array (9), interior yoke (10), centering spring (11), valve body (12), play liquid valve (13) and feed liquor valve (14), its characteristic includes: the outer permanent magnet array (6) and the inner permanent magnet array (9) are Halbach permanent magnet array layers formed by alternately and closely arranging axial magnetizing permanent magnets and radial magnetizing permanent magnets, and the inner permanent magnet array (9) and the outer permanent magnet array (6) are respectively attached to the outer side of the inner yoke (10) and the inner side of the outer yoke (5); the inner yoke (10) and the outer yoke (5) are coaxially fixed through the end cover (4), and an air gap is formed between the inner yoke and the outer yoke; the outer yoke (5) is coaxially and fixedly connected with the end cover (4) and the hydraulic cylinder body (1), and the hydraulic cylinder body (1) is fixedly connected with the valve body (12) to serve as a stator; the coil (7) is wound in the groove of the coil framework (8) and can do reciprocating linear motion in the air gap; the coil framework (8) is respectively and coaxially fixedly connected with the two pistons (2) through the two connecting plates (3), and the pistons (2) can reciprocate in an inner cavity (Q) formed by the hydraulic cylinder body (1) and the end cover (4) to serve as an actuator; the coil (7) consists of a forward winding coil and a reverse winding coil, and the winding directions of the coils of adjacent windings are opposite, wherein the number of the forward windings is m, the number of the reverse windings is n, m and n are positive integers, and m = n or m-n = +/-1; the number of the radially magnetized permanent magnets in the outer permanent magnet array (6) and the number of the axially magnetized permanent magnets in the inner permanent magnet array (9) are equal and are (m + n), and the number of the axially magnetized permanent magnets is equal and are (m + n + 1); the centering spring (11) is arranged in a groove formed by the inner yoke (10) and the end cover (4) together, a hydraulic pump rotor and a hydraulic pump stator of the centering spring (11) form a resonance system together, and the centering spring (11) is always in a compression state.
The liquid outlet valve (13) and the liquid inlet valve (14) are passive one-way valves, the number of the liquid outlet valve (13) and the liquid inlet valve (14) arranged on the same valve body (12) is not less than 1, and the end surfaces of the installation ends of the liquid outlet valve (13) and the liquid inlet valve (14) and the inner end surface of the Q cavity end of the hydraulic cylinder body (1) are in the same plane.
The hydraulic pump rotor reciprocates to directly drive the two pistons (2) to alternately pump liquid in the two symmetrical Q cavities, and the liquid is transmitted in one direction by combining the flow distribution of the liquid outlet valve (13) and the liquid inlet valve (14).
The current in the coil (7) is controlled by a controller, and the amplitude, the frequency and the motion curve of the motion of the rotor of the hydraulic pump are adjusted by controlling the current, so that the control of output fluid is realized.
The axial lengths of the forward winding coil and the reverse winding coil of the coil (7) are equal and are L1; the length of the radially magnetized permanent magnet in the outer permanent magnet array (6) and the inner permanent magnet array (9) is L2; the stroke of the hydraulic pump mover is S, and L1 is more than or equal to (L2 + S).
The connecting plate (3), the end cover (4) and the coil framework (8) are made of magnetism isolating materials, and the inner yoke (10) and the outer yoke (5) are made of soft magnetic materials.
The above description is only a preferred embodiment of the present invention, and it should be noted that: for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be considered as the protection scope of the present invention.
Claims (7)
1. The utility model provides a high power density moving coil formula electromagnetism directly drives hydraulic pump, includes hydraulic cylinder body (1), piston (2), connecting plate (3), end cover (4), outer yoke (5), outer permanent magnet array (6), coil (7), coil skeleton (8), interior permanent magnet array (9), inner yoke (10), centering spring (11), valve body (12), play liquid valve (13) and feed liquor valve (14), its characteristic includes: the outer permanent magnet array (6) and the inner permanent magnet array (9) are Halbach permanent magnet array layers formed by alternately and closely arranging axial magnetizing permanent magnets and radial magnetizing permanent magnets, and the inner permanent magnet array (9) and the outer permanent magnet array (6) are respectively attached to the outer side of the inner yoke (10) and the inner side of the outer yoke (5); the inner yoke (10) and the outer yoke (5) are coaxially fixed through the end cover (4), and an air gap is formed between the inner yoke and the outer yoke; the outer yoke (5) is coaxially and fixedly connected with the end cover (4) and the hydraulic cylinder body (1), and the hydraulic cylinder body (1) is fixedly connected with the valve body (12) to serve as a stator; the coil (7) is wound in the groove of the coil framework (8) and can do reciprocating linear motion in the air gap; the coil framework (8) is respectively and coaxially fixedly connected with the two pistons (2) through the two connecting plates (3), and the pistons (2) can reciprocate in an inner cavity (Q) formed by the hydraulic cylinder body (1) and the end cover (4) to serve as an actuator; the coil (7) consists of a forward winding coil and a reverse winding coil, and the winding directions of the coils of adjacent windings are opposite, wherein the number of the forward windings is m, the number of the reverse windings is n, m and n are positive integers, and m = n or m-n = +/-1; the number of the radially magnetized permanent magnets in the outer permanent magnet array (6) and the number of the axially magnetized permanent magnets in the inner permanent magnet array (9) are equal and are (m + n), and the number of the axially magnetized permanent magnets is equal and are (m + n + 1); the centering spring (11) is arranged in a groove formed by the inner yoke (10) and the end cover (4) together, a hydraulic pump rotor and a hydraulic pump stator of the centering spring (11) form a resonance system together, and the centering spring (11) is always in a compression state.
2. The high power density moving coil type electromagnetic direct drive hydraulic pump as claimed in claim 1, wherein: the liquid outlet valve (13) and the liquid inlet valve (14) are passive one-way valves, the number of the liquid outlet valve (13) and the number of the liquid inlet valve (14) which are arranged on the same valve body (12) are not less than 1, and the end surfaces of the installation ends of the liquid outlet valve (13) and the liquid inlet valve (14) and the inner end surface of the Q cavity end of the hydraulic cylinder body (1) are in the same plane.
3. The high power density moving coil type electromagnetic direct drive hydraulic pump as claimed in claim 1, wherein: the hydraulic pump rotor reciprocates to directly drive the two pistons (2) to alternately pump liquid in the two symmetrical Q cavities, and the liquid is transmitted in one direction by combining the flow distribution of the liquid outlet valve (13) and the liquid inlet valve (14).
4. The high power density moving coil type electromagnetic direct drive hydraulic pump as claimed in claim 1, wherein: the current in the coil (7) is controlled by a controller, and the amplitude, the frequency and the motion curve of the motion of the rotor of the hydraulic pump are adjusted by controlling the current, so that the control of output fluid is realized.
5. The high power density moving coil type electromagnetic direct drive hydraulic pump as claimed in claim 1, wherein: the axial lengths of the forward winding coil and the reverse winding coil of the coil (7) are equal and are L1; the length of the radially magnetized permanent magnet in the outer permanent magnet array (6) and the inner permanent magnet array (9) is L2; the stroke of the hydraulic pump mover is S, and L1 is more than or equal to (L2 + S).
6. The high power density moving coil type electromagnetic direct drive hydraulic pump as claimed in claim 1, wherein: the connecting plate (3), the end cover (4) and the coil framework (8) are made of magnetism isolating materials, and the inner yoke (10) and the outer yoke (5) are made of soft magnetic materials.
7. The high power density moving coil type electromagnetic direct drive hydraulic pump as claimed in claim 1, wherein: the diameter of the piston (2) is not less than that of the coil framework (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020650189.XU CN212155076U (en) | 2020-04-26 | 2020-04-26 | High-power-density moving-coil type electromagnetic direct-drive hydraulic pump |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020650189.XU CN212155076U (en) | 2020-04-26 | 2020-04-26 | High-power-density moving-coil type electromagnetic direct-drive hydraulic pump |
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| CN212155076U true CN212155076U (en) | 2020-12-15 |
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| CN202020650189.XU Expired - Fee Related CN212155076U (en) | 2020-04-26 | 2020-04-26 | High-power-density moving-coil type electromagnetic direct-drive hydraulic pump |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111441928A (en) * | 2020-04-26 | 2020-07-24 | 山东理工大学 | High-power-density moving-coil type electromagnetic direct-drive hydraulic pump |
| CN113335486A (en) * | 2021-07-02 | 2021-09-03 | 中国科学院宁波材料技术与工程研究所 | Jet propulsion device and test system thereof |
| WO2024197506A1 (en) * | 2023-03-27 | 2024-10-03 | 上海携福电器有限公司 | Piston pump drive assembly for cleaning and care tools |
-
2020
- 2020-04-26 CN CN202020650189.XU patent/CN212155076U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111441928A (en) * | 2020-04-26 | 2020-07-24 | 山东理工大学 | High-power-density moving-coil type electromagnetic direct-drive hydraulic pump |
| CN111441928B (en) * | 2020-04-26 | 2024-10-08 | 山东理工大学 | High-power-density moving-coil type electromagnetic direct-drive hydraulic pump |
| CN113335486A (en) * | 2021-07-02 | 2021-09-03 | 中国科学院宁波材料技术与工程研究所 | Jet propulsion device and test system thereof |
| CN113335486B (en) * | 2021-07-02 | 2023-08-18 | 中国科学院宁波材料技术与工程研究所 | Jet propulsion device and test system thereof |
| WO2024197506A1 (en) * | 2023-03-27 | 2024-10-03 | 上海携福电器有限公司 | Piston pump drive assembly for cleaning and care tools |
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Granted publication date: 20201215 Termination date: 20210426 |
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