CN113566011B - Four-module linkage flow distribution type electromagnetic direct drive pump - Google Patents

Four-module linkage flow distribution type electromagnetic direct drive pump Download PDF

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CN113566011B
CN113566011B CN202110769611.2A CN202110769611A CN113566011B CN 113566011 B CN113566011 B CN 113566011B CN 202110769611 A CN202110769611 A CN 202110769611A CN 113566011 B CN113566011 B CN 113566011B
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linkage
valve
pump
pump module
module
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CN113566011A (en
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高仁璟
王赓
黄现国
刘书田
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Dalian University of Technology
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Dalian University of Technology
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
    • F16K31/0603—Multiple-way valves
    • 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
    • F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
    • F15B11/17—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors using two or more pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
    • F16K31/08—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid using a permanent magnet
    • F16K31/082—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid using a permanent magnet using a electromagnet and a permanent magnet

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Electromagnetism (AREA)
  • Details Of Reciprocating Pumps (AREA)

Abstract

The invention relates to the technical field of hydraulic pumps, and provides a four-module linkage flow distribution type electromagnetic direct-drive pump which comprises four linkage pump modules with the same structure and an oil way for connecting the four linkage pump modules; the linkage pump modules respectively comprise moving-coil electromagnetic linear actuators, valve units and pump units; the oil circuit for connecting the four linkage pump modules comprises full linkage connection and half linkage connection. The four-module linkage flow distribution type electromagnetic direct-drive pump simultaneously and jointly drives flow distribution work under the control of four sinusoidal displacement signals with the same amplitude and the sequential phase difference of 90 degrees, so that continuous oil suction and discharge can be realized, and the pulsation of output flow is reduced; meanwhile, the size, the direction and the frequency of output flow can be conveniently adjusted, and the working efficiency and the flexibility of the direct drive pump are improved.

Description

Four-module linkage flow distribution type electromagnetic direct drive pump
Technical Field
The invention relates to the technical field of hydraulic pumps, in particular to a four-module linkage flow distribution type electromagnetic direct-drive pump.
Background
The electromagnetic direct drive pump cancels a motion conversion mechanism of rotation-straight line in the middle of the traditional swash plate type plunger pump, shortens a power transmission route, has the advantages of small volume, simple structure, high power density and the like, is convenient for highly integrated design, and can be widely applied to the fields of aerospace hydrostatic actuators, engineering hydraulic machines, walking hydraulic pressure and the like.
At present, most of common electromagnetic direct-drive pumps work together with an active valve to ensure the continuity of oil pumping and oil discharging, although the flow of pump oil can be changed by adjusting the reciprocating motion amplitude and the actuating frequency of an oil suction and discharge plunger, the additional active valve increases the complexity of the structure, and meanwhile, the problems of serious pump flow pulsation, limited system flow and pressure adjusting capacity and the like still exist.
A multi-piezoelectric driven circulation type active flow distribution pump with patent number CN 103133322B proposes an active flow distribution pump driven by a plurality of piezoelectric ceramic drivers, which can effectively degrade flow pulsation and realize continuous oil suction and discharge, but is limited by the micro-stroke of the piezoelectric ceramic drivers, the rated load of the pump is small, and when a high load is running, the piezoelectric ceramic drivers need an ultra-high frequency running condition, which can generate high-temperature irreversible loss and reduce the working efficiency.
Disclosure of Invention
In order to effectively improve the power density of an electromagnetic direct drive servo, improve the robustness of a system and reduce the nonlinear output of unnecessary flow in work, on the basis of fully considering the high-frequency bidirectional driving characteristic of a moving coil type electromagnetic linear actuator and improving the integration level of an electromagnetic direct drive pump, the invention provides a complete machine structure of a four-module linkage flow distribution type electromagnetic direct drive pump. The invention can effectively improve the power transmission efficiency of the whole electromechanical-hydraulic integration, improve the output power of the system, realize the continuous oil suction and discharge of low-flow pulsation and ensure the working coordination and the application universality of the electromagnetic direct drive pump.
In order to achieve the purpose, the invention adopts the following technical scheme:
a four-module linkage flow distribution type electromagnetic direct drive pump comprises four linkage pump modules with the same structure and oil paths for connecting the four linkage pump modules, wherein the four linkage pump modules are a linkage pump module A, a linkage pump module B, a linkage pump module C and a linkage pump module D respectively;
the linkage pump modules respectively comprise moving-coil electromagnetic linear actuators, valve units and pump units; the moving-coil electromagnetic linear actuator includes: the valve pump comprises an outer yoke 2, a permanent magnet array 4 bonded on the inner surface of the outer yoke 2, a first end cover 1 and a second end cover 7 coaxially fixedly connected at two ends of the permanent magnet array 4 through an inner yoke 3, the outer end part of the second end cover 7 is coaxially fixedly connected with a valve pump fixing flange 8, an electromagnetic coil group 6 is wound in a groove of a coil framework 5, the coil framework 5 is sleeved between the outer surface of the inner yoke 3 and the inner surface of the permanent magnet array 4, extending teeth of the coil framework 5 are arranged in an inner cavity of the valve pump fixing flange 8 through the groove of the second end cover 7, and a coil framework connecting plate 9 is fixedly connected with the coil framework 5 through threaded holes on the extending teeth of the coil framework 5; the valve unit is a two-position three-way slide valve and comprises a first valve cover 10, a valve body 11 and a valve core 12And the second valve cover 13, the first valve cover 10, the valve body 11 and the second valve cover 13 are coaxially fixedly connected to the outer end part of the valve pump fixing flange 8 in sequence, the valve core 12 penetrates through the valve body 11, the valve core close to the end of the valve pump fixing flange 8 is coaxially and threadedly connected with the coil framework connecting plate 9, a valve cavity is formed between the valve core 12 and the valve body 11, and a first valve port A is arranged on the wall of the valve cavityVA second valve port P and a third valve port BV(ii) a The pump unit comprises a cylinder 14 and a piston 15, the cylinder 14 is coaxially and fixedly connected with the outer end part of a second valve cover 13, an extension rod of the piston 15 is coaxially and threadedly connected with a valve core 12, the piston 15 is positioned in the cylinder 14, an oil suction and discharge working cavity is formed between the outer end part of the piston 15 and the cylinder 14, and an oil suction and discharge port A is arranged on the wall of the oil suction and discharge working cavityP；
The oil circuit for connecting the four linkage pump modules comprises full linkage connection and half linkage connection; the full linkage connection is the oil suction and discharge port A of the linkage pump module APAn oil suction and discharge port A connected with a second valve port P of the linkage pump module B and used for the linkage pump module BPAn oil suction and discharge port A connected with the second valve port P of the linkage pump module C and used for the linkage pump module CPAn oil suction and discharge port A connected with a second valve port P of the linkage pump module D and used for the linkage pump module DPIs connected with the second valve port P of the linkage pump module A, and the first valve port A of the linkage pump module AVFirst valve port A of linkage pump module BVFirst valve port A of linkage pump module CVAnd a first valve port A of a linkage pump module DVAre all communicated with the oil port X and linked with a third valve port B of the pump module AVAnd a third valve port B of the linkage pump module BVAnd a third valve port B of the linkage pump module CVAnd a third valve port B of the linkage pump module DVAre all communicated with the oil port Y; the semi-linkage connection is an oil suction and discharge port A of a linkage pump module APAn oil suction and discharge port A connected with a second valve port P of the linkage pump module B and used for the linkage pump module BPAn oil suction and discharge port A connected with a second valve port P of the linkage pump module A and of the linkage pump module CPAn oil suction and discharge port A connected with a second valve port P of the linkage pump module D and used for the linkage pump module DPA third valve port B of the linkage pump module A is connected with a second valve port P of the linkage pump module CVFirst valve port A of linkage pump module BVAnd a third valve port of the linkage pump module CBVAnd a first valve port A of a linkage pump module DVAre all communicated with an oil port X and linked with a first valve port A of a pump module AVAnd a third valve port B of the linkage pump module BVFirst valve port A of linkage pump module CVAnd a third valve port B of the linkage pump module DVAre all communicated with the oil port Y.
Further, the permanent magnet array 4 is formed by m axially magnetized permanent magnets 4.1 and n radially magnetized permanent magnets 4.2 which are tightly attached to each other, wherein m and n are positive integers, and m is equal to n + 1.
Further, the electromagnetic coil group 6 is composed of a forward coil windings 6.1 and b reverse coil windings 6.2, the winding directions of the coils of the adjacent windings are opposite, wherein a and b are positive integers, and a-b or a-b is ± 1.
Furthermore, the number of windings of the electromagnetic coil group 6 and the number of radial magnetizing permanent magnets 4.2 satisfy n ═ a + b.
Furthermore, a hollow hole is formed in the end portion, close to the valve body 11, of the first valve cover 10, a first linear bearing 17 is installed in the hollow hole, a hollow hole is formed in the end portion, close to the valve body 11, of the second valve cover 13, and a second linear bearing 19 is installed in the hollow hole.
Further, a seal ring a16 and a seal ring b18 are provided between the first linear bearing 17 and the first valve cover 10, and a seal ring c20 and a seal ring e22 are provided between the second linear bearing 19 and the second valve cover 13.
Further, the outer surface of the valve core 12 is provided with a sealing ring 1, and the outer surface of the piston 15 is provided with a sealing ring f 23.
Compared with the existing active flow distribution servo pump, the invention has the following advantages:
1. the four-module linkage flow distribution type electromagnetic direct-drive pump adopts the four modules to jointly drive flow distribution, can realize continuous flow output of the pump, reduce flow pulsation, eliminate flow dead zones and improve the flexibility and output power of the pump.
2. The four-module linkage flow distribution type electromagnetic direct drive pump is directly driven by a moving coil type electromagnetic linear actuator based on a permanent magnet array (Halbach permanent magnet array), a rotation-linear motion conversion device is omitted, power transmission efficiency is high, and dynamic response is rapid.
3. The four-module linkage flow distribution type electromagnetic direct drive pump adopts an integrated design, and the moving coil type electromagnetic linear actuator drives the active flow distribution valve to work while driving the piston of the pump unit to work, so that the number of driving elements is reduced, and the structural compactness of the pump is improved.
4. The four-module linkage flow distribution type electromagnetic direct-drive pump can provide different parameter indexes aiming at different performance requirements and application targets, ensures the design flexibility of the electromagnetic direct-drive pump, and has wider application range.
Drawings
FIG. 1 is a schematic diagram of the structure and semi-linkage connection oil circuit of the present invention;
FIG. 2 is a schematic diagram of a single ganged pump module configuration of the present invention;
FIG. 3 is a schematic diagram of the single ganged pump module drive concept of the present invention;
FIG. 4 is a schematic diagram of the structure and full linkage connection oil path of the present invention;
FIG. 5 is a schematic illustration of the displacement of each of the linkage pump modules for a first flow output condition of the present invention;
FIG. 6 is a schematic view of the port X and port Y flow curves for the first flow output condition of the present invention;
FIG. 7 is a schematic displacement diagram of the respective linkage pump modules for a second flow output condition of the present invention;
fig. 8 is a graphical representation of port X and port Y flow curves for a second flow output condition of the present invention.
In the figure: 1 a first end cap; 2 an outer yoke; 3 an inner yoke; 4, permanent magnet array; 5, a coil framework; 6, a solenoid coil group; 7 a second end cap; 8, a valve pump fixing flange; 9, connecting a coil framework; 10 a first valve cover; 11 a valve body; 12 a valve core; 13 a second valve cover; 14 cylinder bodies; 15 a piston; 16, a sealing ring a; 17 a first linear bearing; 18 sealing ring b; 19 a second linear bearing; 20 a sealing ring c; 21, a sealing ring d; 22 a sealing ring e; 23, a sealing ring f;
4.1 axially magnetizing the permanent magnet; 4.2 radial magnetizing permanent magnet;
6.1 forward coil winding; 6.2 reversing the coil winding.
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, a four-module linkage flow distribution type electromagnetic direct drive pump comprises four linkage pump modules with the same structure and an oil path for connecting the four linkage pump modules, wherein the four linkage pump modules are a linkage pump module a, a linkage pump module B, a linkage pump module C and a linkage pump module D respectively;
the linkage pump modules respectively comprise moving-coil electromagnetic linear actuators, valve units and pump units; taking a linkage pump module a as an example, as shown in fig. 2, the moving-coil electromagnetic linear actuator includes an outer yoke 2, a permanent magnet array 4 bonded to an inner surface of the outer yoke 2, a first end cap 1 and a second end cap 7 coaxially connected to two ends of the permanent magnet array 4 through an inner yoke 3, a valve pump fixing flange 8 coaxially connected to an outer end of the second end cap 7, an electromagnetic coil group 6 wound in a groove of a coil frame 5, the coil frame 5 sleeved between an outer surface of the inner yoke 3 and an inner surface of the permanent magnet array 4, protruding teeth of the coil frame 5 disposed in an inner cavity of the valve pump fixing flange 8 through a groove of the second end cap 7, and a coil frame connecting plate 9 fixedly connected to the coil frame 5 through threaded holes on the protruding teeth of the coil frame 5; the valve unit is a two-position three-way slide valve and comprises a first valve cover 10 and a valve body 11, the valve comprises a valve core 12 and a second valve cover 13, wherein the first valve cover 10, the valve body 11 and the second valve cover 13 are sequentially and coaxially fixedly connected to the outer end part of a valve pump fixing flange 8, a hollow hole is formed in the end part of the first valve cover 10 close to the valve body 11, a first linear bearing 17 is installed in the hollow hole, a sealing ring a16 and a sealing ring b18 are arranged between the first linear bearing 17 and the first valve cover 10, a hollow hole is formed in the end part of the second valve cover 13 close to the valve body 11, a second linear bearing 19 is installed in the hollow hole, a sealing ring c20 and a sealing ring e22 are arranged between the second linear bearing 19 and the second valve cover 13, the valve core 12 penetrates through a valve unit, a sealing ring d21 is arranged on the outer surface of the valve core 12, the valve core 12 close to the end of the valve pump fixing flange 8 is coaxially and in threaded connection with a coil framework connecting plate 9, a valve cavity is formed between the valve core 12 and the valve body 11, and a first valve port A is arranged on the wall of the valve cavity.VA second valve port P and a third valve port BV(ii) a The pump unit comprises a cylinder 14 and a piston 15, wherein the cylinder 14 is coaxially fixedThe extension rod of the piston 15 is coaxially and threadedly connected with the valve core 12, the outer surface of the piston 15 is provided with a sealing ring f23, an oil suction and discharge working cavity is formed between the outer end of the piston 15 and the cylinder body 14, and an oil suction and discharge port A is arranged on the wall of the oil suction and discharge working cavityP(ii) a The permanent magnet array 4 is formed by mutually clinging m axial magnetized permanent magnets 4.1 and n radial magnetized permanent magnets 4.2, wherein m and n are positive integers, and m is n + 1; the electromagnetic coil group 6 is composed of a forward coil windings 6.1 and b reverse coil windings 6.2, the winding directions of the coils of the adjacent windings are opposite, wherein a and b are positive integers, and a-b or a-b is +/-1; the number of the windings of the electromagnetic coil group 6 and the number of the radial magnetizing permanent magnets 4.2 meet n which is a + b.
The working principle of the linkage pump module A is shown in fig. 3, a coil framework 5, an electromagnetic coil group 6, a coil framework connecting plate 9, a valve core 12, a piston 15 and a sealing ring jointly form a pump rotor of the linkage pump module A, the current-carrying electromagnetic coil group 6 is subjected to Lorentz force in a stable magnetic field provided by a permanent magnet array 4 and acts on the pump rotor, the valve core 12 and the piston 15 are pushed to generate axial displacement in a stroke, driving force output in different directions can be realized by adjusting different current directions through a controller, and driving force output in different sizes can be realized by adjusting different current amplitudes through the controller; FIG. 3 (a) shows the pump mover at the negative end of its stroke, where the valve chamber is simultaneously with the third valve port BVIs communicated with the second valve port P, and oil can be discharged from the third valve port BVFlows into the valve chamber and is discharged from the second port P, or the second port P may flow into the valve chamber and is discharged from the third port BVWhen the pump mover moves to the right under the current shown in FIG. 3 (a), the valve chamber passes through the second valve port P and the third valve port BVThe communication area is gradually reduced, the volume of the oil suction and discharge working cavity is reduced, and oil inside the oil suction and discharge working cavity passes through the oil suction and discharge port APIs pressed out; when the pump rotor moves to the stroke middle position, as shown in fig. 3 (b), the valve cavity is only communicated with the second valve port P, the pump rotor continues to move rightwards under the current shown in fig. 3 (b), the volume of the oil suction and discharge working cavity is continuously reduced, and oil in the oil suction and discharge working cavity passes through the oil suction and discharge port aPIs pressed out and the valve cavity is communicated withThe second valve port P and the first valve port AVThe communication area of (a) is gradually increased; when the pump rotor continues to move rightwards to the positive end of the stroke under the current as shown in (c) of fig. 3, the volume of the oil suction and discharge working chamber reaches the minimum, the oil suction and discharge work is stopped, and at the moment, the valve chamber and the first valve port A simultaneouslyVIs communicated with the second valve port P, and oil can be discharged from the first valve port AVFlows into the valve chamber and is discharged from the second valve port P, or the second valve port P flows into the valve chamber and is discharged from the first valve port AVDischarging; then, the current direction in the electromagnetic coil group 6 is changed by the control signal, the pump rotor generates reverse displacement and moves leftwards, and the valve cavity passes through the second valve port P and the first valve port AVWhen the pump rotor moves to the stroke middle position, the valve cavity and the first valve port A are connectedVSeparated and then gradually separated from the third valve port B through the second valve port PVThe oil is communicated until the pump rotor reaches the negative end of the stroke, the volume of the oil suction and discharge working cavity is gradually increased in the process, and external oil passes through the oil suction and discharge port APIs sucked into the oil suction and discharge working cavity.
The oil circuit for connecting the four linkage pump modules comprises full linkage connection and half linkage connection; the full linkage connection is the oil suction and discharge port A of the linkage pump module APAn oil suction and discharge port A connected with a second valve port P of the linkage pump module B and used for the linkage pump module BPAn oil suction and discharge port A connected with the second valve port P of the linkage pump module C and used for the linkage pump module CPAn oil suction and discharge port A connected with a second valve port P of the linkage pump module D and used for the linkage pump module DPIs connected with the second valve port P of the linkage pump module A, and the first valve port A of the linkage pump module AVFirst valve port A of linkage pump module BVFirst valve port A of linkage pump module CVAnd a first valve port A of a linkage pump module DVAre all communicated with the oil port X and linked with a third valve port B of the pump module AVAnd a third valve port B of the linkage pump module BVAnd a third valve port B of the linkage pump module CVAnd a third valve port B of the linkage pump module DVAre all communicated with an oil port Y as shown in figure 1; the semi-linkage connection is an oil suction and discharge port A of a linkage pump module APAn oil suction and discharge port A connected with a second valve port P of the linkage pump module B and used for the linkage pump module BPAn oil suction and discharge port A connected with a second valve port P of the linkage pump module A and of the linkage pump module CPAn oil suction and discharge port A connected with a second valve port P of the linkage pump module D and used for the linkage pump module DPA third valve port B of the linkage pump module A is connected with a second valve port P of the linkage pump module CVFirst valve port A of linkage pump module BVAnd a third valve port B of the linkage pump module CVAnd a first valve port A of a linkage pump module DVAre all communicated with an oil port X and linked with a first valve port A of a pump module AVAnd a third valve port B of the linkage pump module BVFirst valve port A of linkage pump module CVAnd a third valve port B of the linkage pump module DVAre all communicated with the oil port Y as shown in fig. 4.
The full linkage connection and the half linkage connection of the oil way have the same principle, but the pipeline connection mode is different. The pump unit of each linkage pump module in the full linkage connection works under the valve unit joint driving distribution flow of the adjacent linkage pump module, namely, the pump unit of the linkage pump module A works under the valve unit joint driving distribution flow of the linkage pump module B, the pump unit of the linkage pump module B works under the valve unit joint driving distribution flow of the linkage pump module C, the pump unit of the linkage pump module C works under the valve unit joint driving distribution flow of the linkage pump module D, and the pump unit of the linkage pump module D works under the valve unit joint driving distribution flow of the linkage pump module A; valve units and pump units of every two adjacent linkage pump modules in the semi-linkage connection are mutually combined to drive flow distribution to work, namely, the pump units and the valve units in the adjacent linkage pump modules A and B are mutually combined to drive flow distribution to work, and the pump units and the valve units in the adjacent linkage pump modules C and D are mutually combined to drive flow distribution to work; the working principle of each linkage pump module is completely the same, the four linkage pump modules simultaneously and jointly drive flow distribution work under the control of four paths of sine displacement signals with the same amplitude and the sequential phase difference of 90 degrees, oil is absorbed from one of an oil port X and an oil port Y, and oil is discharged from the other oil port; the output flow of the four-module linkage flow distribution type electromagnetic direct drive pump can be controlled by controlling the amplitude of the four-way displacement signals, and the flow output direction of the four-module linkage flow distribution type electromagnetic direct drive pump can be controlled by controlling the phase relation of the four-way displacement signals.
The four-module linkage flow distribution type electromagnetic direct drive pump is a bidirectional pump, comprises two flow output working conditions, takes semi-linkage connection of an oil way as an example, and describes the working method of the four-module linkage flow distribution type electromagnetic direct drive pump in detail, and the specific process is as follows:
(1) first flow output condition: oil port X discharges oil and oil port Y sucks oil
The four linkage pump modules in the pump jointly drive flow distribution to work simultaneously according to the principle, and the displacement of the four linkage pump modules is shown in figure 5. For convenience of description, the initial positions of the pump rotors in the four linkage pump modules are set to be sequentially 90-degree-different phases, namely the pump rotor of the linkage pump module A is located at a stroke middle position, the pump rotor of the linkage pump module B is located at a stroke positive end part, the pump rotor of the linkage pump module C is located at a stroke middle position, and the pump rotor of the linkage pump module D is located at a stroke negative end part; at the time of 0 to T/4, the pump rotor of the linkage pump module A moves from the stroke middle position to the stroke positive end part, the piston 15 of the pump rotor in the linkage pump module A compresses the oil suction and discharge working cavity, and oil passes through the second valve port P of the linkage pump module B and is discharged from the first valve port AVConverging the oil port X, discharging the pump from the oil port X, moving the pump rotor of the linkage pump module D from the positive end of the stroke to the middle position of the stroke, compressing a suction and discharge oil working cavity by a piston 15 of the pump rotor in the linkage pump module D, and passing oil through a second valve port P of the linkage pump module C and then through a third valve port BVAn oil inlet X is converged, and the pump is discharged from the oil inlet X; similarly, the oil port Y absorbs oil, and the oil liquid simultaneously drives the oil suction and discharge working cavity of the linkage pump module B in a linkage manner through the linkage pump module A and the linkage pump module B, and simultaneously drives the oil suction and discharge working cavity of the linkage pump module C in a linkage manner through the linkage pump module C and the linkage pump module D; the movement and position relations of the four linkage pump modules are integrated, the flow curves of the oil port X and the oil port Y of the four-module linkage flow-distribution type electromagnetic direct-drive pump in the whole period T are shown in fig. 6, the flow is positive and represents oil discharge, and the flow is negative and represents oil absorption.
(2) Second flow output condition: oil is absorbed by the oil port X and discharged by the oil port Y
The four linkage pump modules in the pump jointly drive flow distribution to work simultaneously according to the principle, and the displacement of the four linkage pump modules is shown in fig. 7. At the time of 0 to T/4, oil is simultaneously driven by the linkage pump module C and the linkage pump module D in a linkage manner to be discharged from an oil suction and discharge working cavity of the linkage pump module C, meanwhile, the oil is simultaneously driven by the linkage pump module C and the linkage pump module D in a linkage manner to be discharged from the oil suction and discharge working cavity of the linkage pump module D, and the discharged oil is converged into an oil port Y and discharged out of the pump from the oil port Y; similarly, the oil port X absorbs oil, and the oil liquid simultaneously drives the oil suction and discharge working cavity of the linkage pump module A in a linkage manner through the linkage pump module A and the linkage pump module B and simultaneously drives the oil suction and discharge working cavity of the linkage pump module B in a linkage manner through the linkage pump module A and the linkage pump module B; the movement and position relations of the four linkage pump modules are integrated, the flow curves of the oil port X and the oil port Y of the four-module linkage flow-distribution type electromagnetic direct-drive pump in the whole period T are shown in fig. 8, the flow is positive and represents oil discharge, and the flow is negative and represents oil absorption.
The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.

Claims (10)

1. A four-module linkage flow distribution type electromagnetic direct drive pump is characterized by comprising four linkage pump modules with the same structure and an oil way for connecting the four linkage pump modules, wherein the four linkage pump modules are respectively a linkage pump module A, a linkage pump module B, a linkage pump module C and a linkage pump module D;
the linkage pump modules respectively comprise moving-coil electromagnetic linear actuators, valve units and pump units; the moving-coil electromagnetic linear actuator includes: the magnetic pump comprises an outer yoke (2), a permanent magnet array (4) adhered to the inner surface of the outer yoke (2), a first end cover (1) and a second end cover (7) which are coaxially and fixedly connected to the two ends of the permanent magnet array (4) through an inner yoke (3), the outer end part of the second end cover (7) is coaxially and fixedly connected with a valve pump fixing flange (8), and an electromagnetic coil group (6) winds aroundThe coil framework connecting plate is manufactured in a groove of a coil framework (5), the coil framework (5) is sleeved between the outer surface of an inner yoke (3) and the inner surface of a permanent magnet array (4), extending teeth of the coil framework (5) are arranged in an inner cavity of a valve pump fixing flange (8) through the groove of a second end cover (7), and a coil framework connecting plate (9) is fixedly connected with the coil framework (5) through threaded holes in the extending teeth of the coil framework (5); the valve unit is a two-position three-way sliding valve and comprises a first valve cover (10), a valve body (11), a valve core (12) and a second valve cover (13), wherein the first valve cover (10), the valve body (11) and the second valve cover (13) are sequentially and coaxially fixedly connected to the outer end part of a valve pump fixing flange (8), the valve core (12) penetrates through the valve body (11), the valve core (12) close to the end of the valve pump fixing flange (8) is coaxially connected with a coil framework connecting plate (9) in a threaded manner, a valve cavity is formed between the valve core (12) and the valve body (11), and a first valve port A is arranged on the wall of the valve cavityVA second valve port P and a third valve port BV(ii) a The pump unit comprises a cylinder body (14) and a piston (15), the cylinder body (14) is coaxially and fixedly connected to the outer end part of a second valve cover (13), an extension rod of the piston (15) is coaxially and threadedly connected with a valve core (12), the piston (15) is positioned in the cylinder body (14), an oil suction and discharge working cavity is formed between the outer end part of the piston (15) and the cylinder body (14), and an oil suction and discharge port A is arranged on the wall of the oil suction and discharge working cavityP；
The oil circuit for connecting the four linkage pump modules comprises full linkage connection and half linkage connection; the full linkage connection is the oil suction and discharge port A of the linkage pump module APAn oil suction and discharge port A connected with a second valve port P of the linkage pump module B and used for the linkage pump module BPAn oil suction and discharge port A connected with the second valve port P of the linkage pump module C and used for the linkage pump module CPAn oil suction and discharge port A connected with a second valve port P of the linkage pump module D and used for the linkage pump module DPIs connected with the second valve port P of the linkage pump module A, and the first valve port A of the linkage pump module AVFirst valve port A of linkage pump module BVFirst valve port A of linkage pump module CVAnd a first valve port A of a linkage pump module DVAre all communicated with the oil port X and linked with a third valve port B of the pump module AVAnd a third valve port B of the linkage pump module BVAnd a third valve port B of the linkage pump module CVAnd a third valve port B of the linkage pump module DVAre all communicated with the oil port Y; oil suction and discharge port of semi-linkage connection-based linkage pump module AAPAn oil suction and discharge port A connected with a second valve port P of the linkage pump module B and used for the linkage pump module BPAn oil suction and discharge port A connected with a second valve port P of the linkage pump module A and of the linkage pump module CPAn oil suction and discharge port A connected with a second valve port P of the linkage pump module D and used for the linkage pump module DPA third valve port B of the linkage pump module A is connected with a second valve port P of the linkage pump module CVFirst valve port A of linkage pump module BVAnd a third valve port B of the linkage pump module CVAnd a first valve port A of a linkage pump module DVAre all communicated with an oil port X and linked with a first valve port A of a pump module AVAnd a third valve port B of the linkage pump module BVFirst valve port A of linkage pump module CVAnd a third valve port B of the linkage pump module DVAre all communicated with the oil port Y.
2. The four-module linkage flow distribution type electromagnetic direct drive pump as claimed in claim 1, wherein the permanent magnet array (4) is formed by m axial magnetizing permanent magnets (4.1) and n radial magnetizing permanent magnets (4.2) which are tightly attached to each other, wherein m and n are positive integers, and m is n + 1.
3. A four-module linkage flow-distribution type electromagnetic direct-drive pump according to claim 1 or 2, wherein the electromagnetic coil group (6) is composed of a forward coil windings (6.1) and b reverse coil windings (6.2), the winding directions of adjacent windings are opposite, wherein a and b are positive integers, and a-b or a-b- ± 1.
4. The four-module linkage flow distribution type electromagnetic direct drive pump as claimed in claim 3, wherein the number of windings of the electromagnetic coil group (6) and the number of radial magnetizing permanent magnets (4.2) satisfy n ═ a + b.
5. The four-module linkage flow distribution type electromagnetic direct drive pump as claimed in claim 1, 2 or 4, wherein a hollow hole is formed in the end portion, close to the valve body (11), of the first valve cover (10), a first linear bearing (17) is installed in the hollow hole, a hollow hole is formed in the end portion, close to the valve body (11), of the second valve cover (13), and a second linear bearing (19) is installed in the hollow hole.
6. A four-module linkage flow-distribution type electromagnetic direct-drive pump as claimed in claim 3, wherein the end of the first valve cover (10) close to the valve body (11) is provided with a hollow hole, a first linear bearing (17) is installed in the hollow hole, the end of the second valve cover (13) close to the valve body (11) is provided with a hollow hole, and a second linear bearing (19) is installed in the hollow hole.
7. The four-module linkage flow distribution type electromagnetic direct drive pump as claimed in claim 5, wherein a sealing ring a (16) and a sealing ring b (18) are arranged between the first linear bearing (17) and the first valve cover (10), and a sealing ring c (20) and a sealing ring e (22) are arranged between the second linear bearing (19) and the second valve cover (13).
8. The four-module linkage flow distribution type electromagnetic direct drive pump as claimed in claim 6, wherein a sealing ring a (16) and a sealing ring b (18) are arranged between the first linear bearing (17) and the first valve cover (10), and a sealing ring c (20) and a sealing ring e (22) are arranged between the second linear bearing (19) and the second valve cover (13).
9. A four-module linkage flow-distribution type electromagnetic direct-drive pump as claimed in claim 1, 2, 4, 6, 7 or 8, wherein the outer surface of the valve core (12) is provided with a sealing ring d (21), and the outer surface of the piston (15) is provided with a sealing ring f (23).
10. A four-module linkage flow-distribution type electromagnetic direct-drive pump as claimed in claim 3, wherein the outer surface of the valve core (12) is provided with a sealing ring d (21), and the outer surface of the piston (15) is provided with a sealing ring f (23).
CN202110769611.2A 2021-07-07 2021-07-07 Four-module linkage flow distribution type electromagnetic direct drive pump Active CN113566011B (en)

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CN102678644A (en) * 2012-05-10 2012-09-19 湖州生力液压有限公司 Combined hydraulic valve for harvesting machine
AT514071B1 (en) * 2013-10-18 2014-10-15 Avl List Gmbh Length adjustable connecting rod
CN207513964U (en) * 2017-11-30 2018-06-19 山推工程机械股份有限公司 A kind of temperature-controlled fan reverse control system
CN108105113A (en) * 2017-12-25 2018-06-01 湖南同能机电科技有限公司 A kind of serial power water pump and the heat pump system for including serial power water pump
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