CN212296747U - High-precision moving-coil electromagnetic direct-drive plunger pump - Google Patents
High-precision moving-coil electromagnetic direct-drive plunger pump Download PDFInfo
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- CN212296747U CN212296747U CN202020651360.9U CN202020651360U CN212296747U CN 212296747 U CN212296747 U CN 212296747U CN 202020651360 U CN202020651360 U CN 202020651360U CN 212296747 U CN212296747 U CN 212296747U
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- plunger pump
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- permanent magnet
- yoke
- piston
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Abstract
The utility model relates to a high accuracy moving coil formula electromagnetism directly drives plunger pump, including displacement sensor, connecting plate, end cover, outer yoke, inner yoke, coil, skeleton, permanent magnet array, hydraulic cylinder body, piston, reset spring, valve block, play liquid valve and feed liquor valve, its characterized in that adopts to hug closely the arrangement each other by axial magnetization permanent magnet and radial magnetization permanent magnet in turn and constitute Halbach permanent magnet array layer table and paste in outer yoke inner survey or the inner yoke outside, is the air gap between outer yoke and the inner yoke, yoke and end cover, hydraulic cylinder body link firmly, make the plunger pump stator; the coil group is wound on the framework and is arranged in the air gap, and the framework is integrated with the piston and used as a plunger pump rotor; the axial length of the coil group is smaller than that of the corresponding radial magnetizing permanent magnet, the controller controls the position of the plunger pump rotor in real time through a feedback signal of the displacement sensor, and the piston is located at the starting position of liquid suction when the plunger pump does not work due to the reset spring. The utility model discloses effectively promote the work efficiency and the control accuracy of hydraulic pump.
Description
Technical Field
The utility model relates to a plunger pump technical field especially relates to an electromagnetism directly drives plunger pump.
Background
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 occasions with high pressure, large flow and flow needing to be regulated. The swash plate type plunger pump has high efficiency and good pressure resistance, can realize various variable functions, and is the mainstream plunger pump in the current market. However, the number of transmission components is large, the movement form is complex, and the further improvement of the performance is also limited.
With the development of the linear direct drive technology, 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, and the realization of high-precision direct drive becomes an important trend in the development of the plunger pump. However, the control precision of the motion form of the plunger pump is directly determined by the driving motor due to the elimination of the motion conversion mechanism, so that the linear motor with rapid response and high control precision becomes a difficult point of technical development, and meanwhile, the influence of the linear motor on the flow control method needs to be considered in the design.
The utility model discloses a high accuracy moving coil formula electromagnetism directly drives plunger pump adopts linear electric motor active cell direct drive pneumatic cylinder piston reciprocating motion, accomplishes the pump of liquid and inhales under the joining in marriage of check valve group and flows, by controller control current, realize hydraulic pump active cell amplitude of motion, frequency and motion curve's regulation through the control of electric current, and then realize the accurate control of output flow and pressure, the power transmission route shortens, the response is rapid, energy transfer efficiency improves, control accuracy promotes.
Disclosure of Invention
The utility model provides a high accuracy moving coil formula electromagnetism directly drives plunger pump, adopt linear electric motor active cell direct drive pneumatic cylinder piston reciprocating motion, accomplish the pump of liquid and inhale under the joining in marriage of check valve group flows, by controller control current, realize hydraulic pump active cell motion amplitude, frequency and motion curve's regulation through the control of electric current, and then realize the accurate control of output flow and pressure, this plunger pump power transmission route shortens, the response is rapid, energy transfer efficiency improves, control accuracy promotes, higher research and practical value have.
The utility model provides a high accuracy moving coil formula electromagnetism directly drives plunger pump, includes displacement sensor (1), connecting plate (2), outer yoke (3), inner yoke (4), coil (5), coil skeleton (6), permanent magnet array (7), end cover (8), reset spring (9), hydraulic cylinder body (10), piston (11), valve body (12), goes out liquid valve (13) and feed liquor valve (14), and its characteristic includes: the permanent magnet array (7) is a Halbach permanent magnet array layer formed by alternately and closely arranging axial magnetizing permanent magnets and radial magnetizing permanent magnets, and the surface of the permanent magnet array (7) is attached to the outer side of the inner yoke (4) or the inner side of the outer yoke (3); the inner yoke (4) and the outer yoke (3) are coaxially fixed through an end cover (8), and an air gap is formed between the inner yoke and the outer yoke; one end of the outer yoke (3) is coaxially and fixedly connected with the end cover (8) and the hydraulic cylinder body (10), the other end of the outer yoke (3) is fixedly connected with a fixing piece of the displacement sensor (1), and the hydraulic cylinder body (10) is fixedly connected with the valve body (12) and used as a plunger pump stator; the coil (5) is wound in the groove of the coil framework (6) and can do reciprocating linear motion in the air gap; one end of the coil framework (6) is coaxially and fixedly connected with a piston (11) through a connecting plate (2), and the piston (11) can reciprocate in an inner cavity formed by a hydraulic cylinder body (10) and an end cover (8) and serves as a plunger pump rotor; one end of a return spring (9) is arranged in a groove at the end part of the inner yoke (4), the other end of the return spring is tightly attached to the connecting plate (2) and is in a compressed state all the time, and when the plunger pump does not work, the rotor is kept at a liquid suction initial position under the action of the return spring (9); the displacement sensor (1) measures the displacement of the liquid plunger pump rotor in real time through the connecting plate (2); the coil (5) 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 radial magnetizing permanent magnets in the permanent magnet array (7) is (m + n), and the number of the axial magnetizing permanent magnets is equal and is (m + n + 1); the lengths of the radial magnetizing permanent magnets are equal, the lengths of the windings are equal, and the length of the radial magnetizing permanent magnet is larger than that of the corresponding winding.
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) mounted on the valve body (12) is not less than 1, and the end faces of the mounting ends of the liquid outlet valve (13) and the liquid inlet valve (14) and the inner end face of the valve body (12) end of the hydraulic cylinder body (10) are in the same plane.
The current in the coil (5) is controlled by a controller, and the amplitude, the frequency and the motion curve of the motion of the plunger pump rotor are adjusted by controlling the current, so that the output flow and the pressure are accurately controlled.
The connecting plate (2), the end cover (8) and the coil framework (6) are made of magnetism isolating materials, and the inner yoke (4) and the outer yoke (3) are made of soft magnetic materials.
The diameter of the piston (11) is not less than that of the coil framework (6).
The utility model discloses a high accuracy moving coil formula electromagnetism directly drives plunger pump adopts linear electric motor active cell direct drive pneumatic cylinder piston reciprocating motion, accomplishes the pump of liquid and inhales under the joining in marriage of check valve group and flows, by controller control current, realize hydraulic pump active cell amplitude of motion, frequency and motion curve's regulation through the control of electric current, and then realize the accurate control of output flow and pressure, the power transmission route shortens, the response is rapid, energy transfer efficiency improves, control accuracy promotes.
The utility model discloses a high accuracy moving coil formula electromagnetism directly drives plunger pump adopts moving coil formula electromagnetic actuator as drive unit, directly drives the piston, and power transmission route is short, high-efficient energy-conservation; the moving-coil electromagnetic actuator is high in control precision and quick in response, the dynamic performance of the plunger pump is effectively improved, the Halbach permanent magnet array-based permanent magnet linear motor is adopted, the air gap magnetic field intensity is enhanced, and the driving force and the response speed are improved.
The utility model discloses a plunger pump is directly driven to high accuracy moving coil formula electromagnetism, coil winding length are less than radial magnetizing permanent magnet length for the change of moving coil formula electromagnetic actuator force coefficient weakens in the course of the work, has promoted the linear output characteristic of executor, is favorable to improving the control accuracy of plunger pump.
The utility model discloses a high accuracy moving coil formula electromagnetism directly drives plunger pump adopts reset spring to make the piston keep at pump liquid ending position (imbibition initial position) when out of work, does not influence each other between at every turn work in order to promote flow control precision.
The utility model discloses a plunger pump is directly driven to high accuracy moving coil formula electromagnetism, the electric current in the coil is controlled by the controller, realizes doing the regulation of hydraulic pump active cell motion amplitude, frequency and motion curve through the control of electric current, and then realizes the accurate control of output flow and pressure.
The utility model discloses a plunger pump is directly driven to high accuracy moving coil formula electromagnetism has simple structure, the integration of being convenient for, advantage such as efficient, will bring huge economic benefits after dropping into the industrialization and using.
Drawings
Fig. 1 is a schematic structural view of the high-precision moving-coil electromagnetic direct-drive plunger pump (the permanent magnet array is labeled on the inner yoke).
Fig. 2 is the utility model discloses a high accuracy moving coil formula electromagnetism directly drives plunger pump connecting plate axial view.
Fig. 3 is a schematic structural view of the high-precision moving-coil electromagnetic direct-drive plunger pump (the permanent magnet array is labeled on the outer yoke).
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-precision moving-coil electromagnetic direct-drive plunger pump comprises a displacement sensor (1), a connecting plate (2), an outer yoke (3), an inner yoke (4), a coil (5), a coil framework (6), a permanent magnet array (7), an end cover (8), a return spring (9), a hydraulic cylinder body (10), a piston (11), a valve body (12), a liquid outlet valve (13) and a liquid inlet valve (14); the permanent magnet array (7) is a Halbach permanent magnet array layer formed by alternately and closely arranging axial magnetizing permanent magnets and radial magnetizing permanent magnets, and the surface of the permanent magnet array (7) is attached to the outer side of the inner yoke (4) or the inner side of the outer yoke (3); the inner yoke (4) and the outer yoke (3) are coaxially fixed through an end cover (8), and an air gap is formed between the inner yoke and the outer yoke; one end of the outer yoke (3) is coaxially and fixedly connected with the end cover (8) and the hydraulic cylinder body (10), the other end of the outer yoke (3) is fixedly connected with a fixing piece of the displacement sensor (1), and the hydraulic cylinder body (10) is fixedly connected with the valve body (12) and used as a plunger pump stator; the coil (5) is wound in the groove of the coil framework (6) and can do reciprocating linear motion in the air gap; one end of the coil framework (6) is coaxially and fixedly connected with a piston (11) through a connecting plate (2), and the piston (11) can reciprocate in an inner cavity formed by a hydraulic cylinder body (10) and an end cover (8) and serves as a plunger pump rotor; as shown in fig. 2, for the connecting plate (2), in order to facilitate the installation of the connecting plate (2), partial materials are correspondingly removed from two ends of the coil framework (6); one end of a return spring (9) is arranged in a groove at the end part of the inner yoke (4), the other end of the return spring is tightly attached to the connecting plate (2) and is in a compressed state all the time, and when the plunger pump does not work, the rotor is kept at a liquid suction initial position under the action of the return spring (9); the displacement sensor (1) measures the displacement of the liquid plunger pump rotor in real time through the connecting plate (2); the coil (5) 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 radial magnetizing permanent magnets in the permanent magnet array (7) is (m + n), and the number of the axial magnetizing permanent magnets is equal and is (m + n + 1); the lengths of the radial magnetizing permanent magnets are equal, the lengths of the windings are equal, and the length of the radial magnetizing permanent magnet is larger than that of the corresponding winding.
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 valve body (12) is not less than 1, and the end surfaces of the mounting ends of the liquid outlet valve (13) and the liquid inlet valve (14) and the inner end surface of the valve body (12) end of the hydraulic cylinder body (10) are in the same plane.
The current in the coil (5) is controlled by a controller, and the amplitude, the frequency and the motion curve of the motion of the plunger pump rotor are adjusted by controlling the current, so that the output flow and the pressure are accurately controlled.
The connecting plate (2), the end cover (8) and the coil framework (6) are made of magnetism isolating materials, and the inner yoke (4) and the outer yoke (3) are made of soft magnetic materials.
The diameter of the piston (11) is not less than that of the coil bobbin (6).
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 (5)
1. The utility model provides a high accuracy moving coil formula electromagnetism directly drives plunger pump, includes displacement sensor (1), connecting plate (2), outer yoke (3), inner yoke (4), coil (5), coil skeleton (6), permanent magnet array (7), end cover (8), reset spring (9), hydraulic cylinder body (10), piston (11), valve body (12), goes out liquid valve (13) and feed liquor valve (14), and its characteristic includes: the permanent magnet array (7) is a Halbach permanent magnet array layer formed by alternately and closely arranging axial magnetizing permanent magnets and radial magnetizing permanent magnets, and the surface of the permanent magnet array (7) is attached to the outer side of the inner yoke (4) or the inner side of the outer yoke (3); the inner yoke (4) and the outer yoke (3) are coaxially fixed through an end cover (8), and an air gap is formed between the inner yoke and the outer yoke; one end of the outer yoke (3) is coaxially and fixedly connected with the end cover (8) and the hydraulic cylinder body (10), the other end of the outer yoke (3) is fixedly connected with a fixing piece of the displacement sensor (1), and the hydraulic cylinder body (10) is fixedly connected with the valve body (12) and used as a plunger pump stator; the coil (5) is wound in the groove of the coil framework (6) and can do reciprocating linear motion in the air gap; one end of the coil framework (6) is coaxially and fixedly connected with a piston (11) through a connecting plate (2), and the piston (11) can reciprocate in an inner cavity formed by a hydraulic cylinder body (10) and an end cover (8) and serves as a plunger pump rotor; one end of a return spring (9) is arranged in a groove at the end part of the inner yoke (4), the other end of the return spring is tightly attached to the connecting plate (2) and is in a compressed state all the time, and when the plunger pump does not work, the rotor is kept at a liquid suction initial position under the action of the return spring (9); the displacement sensor (1) measures the displacement of the liquid plunger pump rotor in real time through the connecting plate (2); the coil (5) 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 radial magnetizing permanent magnets in the permanent magnet array (7) is (m + n), and the number of the axial magnetizing permanent magnets is equal and is (m + n + 1); the lengths of the radial magnetizing permanent magnets are equal, the lengths of the windings are equal, and the length of the radial magnetizing permanent magnet is larger than that of the corresponding winding.
2. The high-precision moving-coil electromagnetic direct-drive plunger pump as claimed in claim 1, wherein the liquid outlet valves (13) and the liquid inlet valves (14) are passive one-way valves, the number of the liquid outlet valves (13) and the number of the liquid inlet valves (14) mounted on the valve body (12) are not less than 1, and the end surfaces of the mounting ends of the liquid outlet valves (13) and the liquid inlet valves (14) are in the same plane as the inner end surface of the valve body (12) of the hydraulic cylinder body (10).
3. The high-precision moving coil type electromagnetic direct-drive plunger pump as claimed in claim 1, wherein the current in the coil (5) is controlled by a controller, and the amplitude, frequency and motion curve of the motion of the plunger pump mover are adjusted by controlling the current, so that the output flow and pressure are precisely controlled.
4. The high-precision moving-coil type electromagnetic direct-drive plunger pump as claimed in claim 1, wherein the connecting plate (2), the end cap (8) and the coil bobbin (6) are made of magnetism isolating materials, and the inner yoke (4) and the outer yoke (3) are made of soft magnetic materials.
5. A high precision moving coil electromagnetic direct drive plunger pump according to claim 1, characterized in that the diameter of the piston (11) is not less than the diameter of the bobbin (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020651360.9U CN212296747U (en) | 2020-04-26 | 2020-04-26 | High-precision moving-coil electromagnetic direct-drive plunger pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020651360.9U CN212296747U (en) | 2020-04-26 | 2020-04-26 | High-precision moving-coil electromagnetic direct-drive plunger pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212296747U true CN212296747U (en) | 2021-01-05 |
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ID=73963248
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020651360.9U Expired - Fee Related CN212296747U (en) | 2020-04-26 | 2020-04-26 | High-precision moving-coil electromagnetic direct-drive plunger pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212296747U (en) |
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2020
- 2020-04-26 CN CN202020651360.9U patent/CN212296747U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210105 |