Motor plunger pump driven by electromagnetic force

Abstract

The present invention provides an electromagnetic force-driven motor plunger pump, a plunger motor pump, which includes a first pump body, a distribution ring, a slip ring, a first rotor plunger cylinder, a first plunger, a first slipper and a first swash plate; windings are circumferentially arranged on the inner wall of the first pump body, and windings are circumferentially arranged on the outer wall of the first rotor plunger cylinder. The windings on the first pump body and the windings on the first rotor plunger cylinder form an electromagnetic field to drive the plunger pump to rotate. An adjustable plunger motor pump includes a second pump body, a second rotor plunger cylinder, a second plunger, a second slipper, a second swash plate and an adjusting shaft; windings are circumferentially arranged on the inner wall of the second pump body, and permanent magnets are circumferentially arranged on the outer wall of the second rotor plunger cylinder. The windings on the second pump body generate a rotating magnetic field, and the second rotor plunger cylinder generates a constant magnetic field. The constant magnetic field drives the second rotor plunger cylinder to rotate under the action of the rotating magnetic field. In the present invention, the electromagnetic force is generated by the interaction of the magnetic fields generated by the windings for driving, which improves the transmission efficiency and reduces the energy loss.

Description

Technical Field

[0001] The present invention relates to the technical fields of hydraulic pumps and motors, and particularly relates to a motor plunger pump driven by electromagnetic force. Background Art

[0002] When the plunger pump rotates under the action of electromagnetism, it relies on centrifugal force and hydraulic pressure to press against and be fixed on the inner surface of the cylinder block. When the rotor rotates, due to the eccentric action of the swash plate, the plunger will reciprocate. The sealed volume formed by the plunger in the cylinder block changes to achieve oil suction and oil pressure. The inlet and outlet of the oil fluid pass through the flow channels on the pump body and the distribution ring, and the inlet and outlet of the oil fluid are realized through the inlet and outlet ports on the pump body.

[0003] Since in the existing plunger pump during operation, the drive shaft inside the pump body is connected to the motor through a coupling, and the motor provides torque. The driving torque is transmitted by the coupling to the plunger cylinder block inside the pump body. Since the shaft power transmitted from the motor to the shaft first needs to overcome the frictional losses of the bearings and the sealing device, the remaining shaft power is used to drive the rotation of the plunger pump cylinder block. The external motor increases the overall structure of the plunger pump and occupies a relatively large floor area; at the same time, due to the installation process of the drive shaft, vibration and noise are inevitably caused, and mechanical losses are increased, reducing the efficiency. In addition, the disadvantages of the plunger pump are complex structure, high machining accuracy requirements for some parts, and phenomena such as leakage, noise, and heat generation. Summary of the Invention

[0004] Aiming at the problems existing in the connection between the existing plunger pump and the external motor, the present invention provides a motor plunger pump driven by electromagnetic force, which integrates the motor and the plunger pump. A stator is arranged inside the pump body of the plunger pump, and permanent magnets are inserted or winding coils are wound in the grooves outside the rotor plunger cylinder. A magnetic field is generated through the action of electromagnetism. The constant magnetic field generates an electromagnetic torque under the action of the continuously changing rotating magnetic field in the pump body, driving the rotation of the rotor plunger cylinder and realizing the rotation of the cylinder block. Thus, an external motor is not required, and components such as couplings and bearings are saved, saving costs and having a compact structure; at the same time, the drive is integrated inside the plunger pump, reducing the volume of the plunger pump, being convenient for installation, and being easy to control and adjust the size of the oil suction and discharge volume, reducing the efficiency loss during the transmission of the external motor shaft, improving the working efficiency of the plunger pump, and prolonging the service life of the plunger pump.

[0005] The present invention provides an electromagnetic force-driven motor plunger pump, which includes a first pump body, a distribution ring, a sliding ring, a first rotor plunger cylinder, a first plunger, an axial support spring, a steel ball, a spring support, a first slipper, a first plunger support, a first swash plate and a rear end cover. The outer wall mounting end of the first pump body is connected to the first mounting end of the rear end cover through a sealing ring. The circumference of the inner wall of the first pump body is provided with magnetic columns, and windings are arranged on the magnetic columns. A rotor support shaft is arranged at the center inside the first pump body. The mounting end of the distribution ring is connected to the inner wall mounting end of the first pump body. The first end of the inner sliding ring is connected to the first mounting end of the rotor support shaft. The first mounting end of the outer sliding ring is connected to the inner mounting end inside the first rotor plunger cylinder. The second end of the inner sliding ring is connected to the second end of the outer sliding ring. The middle mounting end of the first rotor plunger cylinder is connected to the second mounting end of the rotor support shaft. The circumference of the outer wall of the first rotor plunger cylinder is provided with magnetic columns, and windings are passed through the magnetic columns. The windings on the pump body and the windings on the first rotor plunger cylinder form an electromagnetic field to drive the plunger pump to rotate. A plunger cavity is arranged at the first end of the first rotor plunger cylinder. The mounting end of the first plunger is located inside the plunger cavity. The spherical end of the first plunger is connected to the movable end of the first slipper through the circumferential mounting end of the first plunger support. The fixed end of the first slipper is connected to the first end of the first swash plate. The second end of the first swash plate is connected to the second mounting end of the rear end cover through a cylindrical pin. The first end of the axial support spring is connected to the inner mounting end inside the rotor support shaft. The second end of the axial support spring is connected to the first end of the spring support through a spring support. The second end of the steel ball support is connected to the central mounting end of the first plunger support through a steel ball.

[0006] Preferably, an oil inlet hole, an oil outlet hole, an oil discharge hole, a sliding ring inner ring wiring hole and a stator wiring hole are sequentially arranged on the first pump body. Two oil grooves corresponding to the oil inlet hole and the oil outlet hole on the first pump body are respectively arranged on the distribution ring.

[0007] Preferably, an oil hole communicating with the oil groove on the distribution ring is arranged at the second end of the first rotor plunger cylinder.

[0008] Preferably, the axes of the rotor support shaft of the first pump body, the distribution ring, the inner sliding ring, the outer sliding ring, the first rotor plunger cylinder, the axial support spring, the spring support, the steel ball support, the steel ball, the first plunger support, the first swash plate and the rear end cover are on the same straight line.

[0009] Preferably, the plunger cavity of the first rotor plunger cylinder, the first plunger, the first slipper, the axial support spring, the spring support, the steel ball support, the steel ball, the first plunger support and the first swash plate form a piston assembly.

[0010] In a second aspect of the present invention, there is provided an electromagnetic force-driven motor plunger pump, which includes a second pump body, a cylinder block, a second rotor plunger cylinder, a second plunger, a second plunger support, a second slipper, a second swash plate, a top cover, a pointer, a meter head, an adjusting shaft, an end cover, a transmission shaft, a knob and a permanent magnet. The installation end of the second pump body is connected to the first installation end of the top cover through a sealing gasket. The circumferential direction of the inner wall of the second pump body is provided with magnetic columns, and windings are arranged on the magnetic columns. A plunger cylinder support shaft is arranged at the center inside the second pump body, and the plunger cylinder support shaft is connected to the first installation end of the cylinder block. The second installation end of the cylinder block is connected to the installation end of the second rotor plunger cylinder. The circumferential direction of the outer wall of the second rotor plunger cylinder is provided with permanent magnet grooves, and the permanent magnets are located in the permanent magnet grooves. The windings on the second pump body generate a rotating magnetic field, and the second rotor plunger cylinder generates a constant magnetic field. The constant magnetic field drives the second rotor plunger cylinder to rotate under the action of the continuously changing rotating magnetic field of the second pump body, thereby realizing the rotation of the cylinder block. A plunger cavity is arranged at the third installation end of the cylinder block. The installation end of the second plunger is located inside the plunger cavity. The spherical end of the second plunger is connected to the sliding end of the second slipper through the circumferential installation end of the second plunger support assembly. The fixed end of the second slipper is connected to the first end of the second swash plate. The second end of the second swash plate is connected to the second installation end of the top cover. The installation end of the meter head passes through the installation end of the pointer and is connected to the third installation end of the top cover. The first end of the adjusting shaft is connected to the third end of the second swash plate. The second end of the adjusting shaft passes through the first end of the end cover and is connected to the first end of the transmission shaft. The second end of the transmission shaft is connected to the knob. The second end of the end cover is connected to the fourth installation end of the top cover.

[0011] Preferably, an oil suction hole, an oil discharge hole and a stator wiring hole are sequentially arranged on the second pump body.

[0012] Preferably, the second plunger, the second slipper and the second plunger support form a plunger assembly.

[0013] Preferably, the axes of the plunger cylinder support shaft of the second pump body, the cylinder block, the second rotor plunger cylinder, the second plunger support, the second swash plate and the top cover are on the same straight line, and the axes of the adjusting shaft, the end cover, the transmission shaft and the knob are on the same straight line.

[0014] Compared with the prior art, the present invention has the following advantages:

[0015] 1. Compared with traditional piston pumps, the present invention no longer requires an external motor to provide torque. Instead, electromagnetic force is generated by the interaction of magnetic fields produced by internal windings for driving, which improves the transmission efficiency, reduces energy loss, eliminates components such as couplings, motors, and bearings, lowers the usage cost, and only requires energizing the windings inside the pump body. At the same time, the volume of the piston pump is simplified, with a compact structure and small size, which simplifies its external structure and enables it to be installed in a relatively narrow space.

[0016] 2. The present invention optimizes the pump body structure of traditional piston pumps, reducing the possibilities of vibrations and noises caused by the eccentricity of the installed coupling, and improving the working efficiency.

[0017] 3. In the present invention, since there is no longer a need to extend the shaft of the pump body outside the housing, there is no longer a need to separately seal the hole where the shaft extends on the pump body, reducing the possibility of oil leakage and improving the sealing performance of the pump body.

[0018] 4. In the present invention, the rotation of the piston pump is driven by the electromagnetic torque generated by the coils on the pump body and the rotor piston cylinder under the action of three-phase current, enabling a relatively large rotational speed. The rotational speed can be adjusted by adjusting the current magnitude, which is convenient for control.

[0019] 5. The piston motor pump of the present invention uses steel balls to reduce the friction between the spring support and the piston support, and the shaft is covered with a resin material, effectively reducing the friction and wear between the shaft and the cylinder block, and extending the service life. Description of the Drawings

[0020] Figure 1 It is a cross-sectional view of the piston motor pump in the motor piston pump driven by electromagnetic force according to the present invention;

[0021] Figure 2 It is an axonometric view of the piston motor pump in the motor piston pump driven by electromagnetic force according to the present invention;

[0022] Figure 3 It is a cross-sectional view of the rotor piston cylinder of the piston motor pump in the motor piston pump driven by electromagnetic force according to the present invention;

[0023] Figure 4 It is an exploded view of the piston motor pump in the motor piston pump driven by electromagnetic force according to the present invention;

[0024] Figure 5 It is a three-dimensional view of the piston cylinder of the piston motor pump in the motor piston pump driven by electromagnetic force according to the present invention;

[0025] Figure 6 It is an axonometric view of the adjustable piston motor pump in the motor piston pump driven by electromagnetic force according to the present invention;

[0026] Figure 7Explosion diagram of the adjustable plunger motor pump in the electromagnetic force-driven motor plunger pump of the present invention;

[0027] Figure 8 Structural diagram of the second pump body of the adjustable plunger motor pump in the electromagnetic force-driven motor plunger pump of the present invention;

[0028] Figure 9 Structural diagram of the cylinder block of the adjustable plunger motor pump in the electromagnetic force-driven motor plunger pump of the present invention;

[0029] Figure 10 Structural diagram of the second rotor plunger cylinder of the adjustable plunger motor pump in the electromagnetic force-driven motor plunger pump of the present invention;

[0030] Figure 11 Schematic diagram of the adjustable plunger motor pump in the electromagnetic force-driven motor plunger pump of the present invention.

[0031] Main reference numerals:

[0032] The first pump body 1, oil distribution ring 2, outer sliding ring 3, inner sliding ring 4, first rotor plunger cylinder 5, first plunger 6, axial support spring 7, spring support member 8, steel ball support member 9, cylindrical pin 10, steel ball 11, first slipper 12, first plunger support member 13, first swash plate 14, rear end cover 15, second pump body 16, cylinder block 17, second rotor plunger cylinder 18, second plunger 19, second plunger support member 20, second slipper 21, second swash plate 22, sealing washer 23, top cover 24, pointer 25, meter head 26, adjusting shaft 27, end cover 28, transmission shaft 29, knob 30, winding 31, permanent magnet 32, permanent magnet groove 33. Detailed description of the specific implementation

[0033] To elaborate on the technical content, structural features, achieved objectives and effects of the present invention, the following will be described in detail with reference to the accompanying drawings of the specification.

[0034] The plunger motor pump driven by electromagnetic force, as Figures 1 to 5 shown, includes the first pump body 1, oil distribution ring 2, outer sliding ring 3, inner sliding ring 4, first rotor plunger cylinder 5, first plunger 6, axial support spring 7, spring support member 8, steel ball support member 9, cylindrical pin 10, steel ball 11, first slipper 12, first plunger support member 13, first swash plate 14 and rear end cover 15; both the first pump body 1 and the oil distribution ring 2 are made of silicon steel, the oil distribution ring 2, the first plunger 6, the first slipper 12 and the first plunger support member 13 are all made of brass, and the first swash plate 14 and the rear end cover 15 are both made of stainless steel.

[0035] As Figure 1 and Figure 4As shown in the figure, the outer wall mounting end of the first pump body 1 is connected to the first mounting end of the rear end cover 15 through a sealing gasket 23 and bolts. The sealing gasket 23 is located in the sealing groove of the first pump body 1. The circumference of the inner wall of the first pump body 1 is provided with magnetic columns, and windings 31 are arranged on the magnetic columns. The center of the interior of the first pump body 1 is provided with a rotor support shaft for supporting the first rotor plunger cylinder 5, and the rotor support shaft is covered with a resin material to facilitate sealing and reduce friction. The mounting end of the oil distribution ring 2 is connected to the mounting end of the inner wall of the first pump body 1 through interference fit.

[0036] Furthermore, in order to reasonably arrange the space and avoid the problem of external wire entanglement, two pairs of slip rings are arranged on the rotor support shaft inside the first pump body 1. The inner slip ring 4 and the outer slip ring 3 are nested. The first rotor plunger cylinder 5 is circumferentially provided with holes for facilitating the connection of the wire of the winding 31 to the slip rings. The first end of the inner slip ring 4 is connected to the first mounting end of the rotor support shaft through interference fit. The first mounting end of the outer slip ring 3 is connected to the mounting end inside the rotor plunger cylinder 5. The second end of the inner slip ring 4 is connected to the second end of the outer slip ring 3. Power supply is carried out through the holes on the first pump body 1 and can rotate together with the first rotor plunger cylinder 5. When starting to work, the inner slip ring 4 is stationary and the outer slip ring 3 rotates. The wire connecting the winding 31 passes through the slip rings and is connected to the outside, thus avoiding the entanglement of the wire due to rotation. The outer sides of the inner slip ring 4 and the outer slip ring 3 are filled and fixed on the rotor support shaft with resin material, and the space between the two pairs of slip rings is also filled with resin material. One is to fix the slip rings, and the other is to reduce friction and wear. When the winding 31 is energized, driven by the electromagnetic force, the first rotor plunger cylinder 5 acts as a rotor to rotate, and the plunger 6 makes a reciprocating motion. At this time, an air pressure difference will be caused at the oil inlet hole and the oil outlet hole, thereby realizing the functions of oil absorption and oil discharge.

[0037] As Figure 2 、 Figure 3 and Figure 5 shown in the figure, the middle mounting end of the first rotor plunger cylinder 5 is connected to the second mounting end of the rotor support shaft. The circumference of the outer wall of the first rotor plunger cylinder 5 is provided with magnetic columns, and the windings 31 are energized through the holes on the pump body 1. The windings 31 on the first pump body 1 and the windings 31 on the rotor plunger cylinder 5 form an electromagnetic field to drive the plunger pump to rotate. The first end of the first rotor plunger cylinder 5 is provided with a plunger cavity. The mounting end of the first plunger 6 is located inside the plunger cavity. The spherical end of the first plunger 6 is connected to the movable end of the first slipper 12 through the circumferential mounting end of the first plunger support 13. The fixed end of the first slipper 12 is connected to the first end of the first swash plate 14. Since the oil is introduced into the holes of the first slipper 12, the existence of the hydrostatic support makes it firmly fit with the first swash plate 14. The first plunger 6 is circumferentially arranged in the plunger cavity of the first rotor plunger cylinder 5 according to a certain rule. The second end of the first swash plate 14 is connected to the second mounting end of the rear end cover 15 through a cylindrical pin 10.

[0038] Preferably, the first plunger 6 rotates within a certain range around the first slipper 12. There is an oil cavity inside the first slipper 12, which is connected to the pore passage inside the first plunger 6. The small holes on the first plunger 6 lead the pressure to the cavity again, forming an oil film between the first slipper 12 and the first swash plate 14, thus forming a hydrostatic bearing. Due to the existence of action and reaction forces, that is, the pressurized oil acts on the first plunger 6, generating a normal pressing force on the first slipper 12, while the oil film pressure between the first swash plate 14 and the first slipper 12 generates a reverse thrust on the slipper. Relying on the force balance, the first slipper 12 will closely rely on the first swash plate 14. When the plunger cylinder rotates under the action of electromagnetic force, due to the action of the first swash plate 14 and the first slipper 12, the first plunger 6 can perform reciprocating linear motion within the cavity, thereby completing the actions of oil suction and oil discharge. At the same time, the first swash plate 14 is connected to the rear end cover 15 at a certain inclination angle, so that it can be fixed in the first pump body 1. To increase the overall sealing performance and prevent oil leakage, a sealing groove is provided on the first pump body 1 to place the sealing gasket 23.

[0039] The first end of the axial support spring 7 is connected to the installation end inside the rotor support shaft. The second end of the axial support spring 7 is connected to the first end of the spring support member 8 and the ball support member 9. The spring support member 8 and the ball support member 9 are nested with each other. The second end of the ball support member 9 is connected to the central installation end of the first plunger support member 13 through the ball 11. The ball 11 rotates to reduce the friction between the spring support member 8 and the first plunger support member 13. Circular holes are circumferentially provided on the first plunger support member 13. The spherical end of the first plunger 6 is located within the circular holes, and the first plunger support member 13 is parallel to the first swash plate 14. The first plunger support member 13 functions to support the plunger.

[0040] Specifically, the first pump body 1 is successively provided with an oil inlet hole, an oil outlet hole, an oil drain hole, an inner ring connection hole of the slip ring, and a stator connection hole. The oil inlet hole and the oil outlet hole are symmetrically distributed. The oil drain holes are distributed near the outer edge. External threads are provided on the oil drain holes for sealing when not in use. The connection holes are convenient for accessing external current, and internal threads are provided for sealing. Inner holes are provided at the connection between the inner slip ring 4 and the stator. A connection groove for the inner slip ring 4 is provided on one side of the rotor support shaft. After the inner slip ring 4 is connected to the circuit, it is filled and fixed with resin. The oil distribution ring 2 is in a disc shape, with arc-shaped pore passages drilled thereon and symmetrically distributed, corresponding to the two oil grooves of the oil inlet hole and the oil outlet hole on the first pump body 1 respectively, forming a channel between the first rotor plunger cylinder 5 and the first pump body 1, playing the role of high and low pressure oil circuit distribution. When the first rotor plunger cylinder 5 in the plunger pump rotates, the oil flowing through the oil distribution ring 2 is discharged from the oil discharge port. An oil hole communicating with the oil groove on the oil distribution ring 2 is provided at the second end of the first rotor plunger cylinder 5. The circumference of the side of the first rotor plunger cylinder 5 in contact with the oil distribution ring 2 is drilled and connected to the outer slip ring 3. After connecting the circuit, it is filled and fixed with resin.

[0041] In a preferred embodiment of the present invention, the axes of the rotor support shaft of the first pump body 1, the oil distribution ring 2, the inner sliding ring 4, the outer sliding ring 3, the first rotor plunger cylinder 5, the axial support spring 7, the spring support 8, the ball support 9, the ball 11, the first plunger support 13, the first swash plate 14 and the rear end cover 15 are on the same straight line.

[0042] Preferably, the plunger cavity of the first rotor plunger cylinder 5, the first plunger 6, the first slipper 12, the axial support spring 7, the spring support 8, the ball support 9, the ball 11, the first plunger support 13 and the first swash plate 14 form a piston assembly.

[0043] An adjustable plunger motor pump driven by electromagnetic force, such as Figure 6 and Figure 7 shown, includes a second pump body 16, a cylinder block 17, a second rotor plunger cylinder 18, a second plunger 19, a second plunger support 20, a second slipper 21, a second swash plate 22, a sealing gasket 23, a top cover 24, a pointer 25, a meter head 26, an adjusting shaft 27, an end cover 28, a transmission shaft 29, a knob 30 and a permanent magnet 32. Both the second pump body 16 and the second swash plate 22 are made of silicon steel; the second plunger 19, the second plunger support 20 and the second slipper 21 are made of brass; the top cover 24 is made of stainless steel.

[0044] As Figure 6 shown, the mounting end of the second pump body 16 is connected to the first mounting end of the top cover 24 through a sealing gasket 23 and bolts to form a sealed volume to prevent oil leakage. The bolt connection ensures the sealing performance of the working environment. A magnetic column is provided circumferentially on the inner wall of the second pump body 16, and 16 sets of windings 31 are provided on the magnetic column. The current flows through the wiring holes of the second pump body 16 to generate a rotating magnetic field. A plunger cylinder support shaft is provided at the center inside the second pump body 16, and a resin structure is filled on the plunger cylinder support shaft to reduce the friction and wear with the plunger cylinder support shaft, which is used to support the cylinder block 17 and the second rotor plunger cylinder 18 and is also communicated with the oil suction hole and the oil discharge hole.

[0045] The plunger cylinder support shaft is connected to the first mounting end of the cylinder block 17 by interference fit, and the second mounting end of the cylinder block 17 is connected to the mounting end of the second rotor plunger cylinder 18 by interference fit. The three-dimensional structure of the second rotor plunger cylinder 18 is as Figure 9 shown. The interference fit ensures that the cylinder block 17 can rotate synchronously while the second rotor plunger cylinder 18 rotates. A permanent magnet groove 33 is provided circumferentially on the outer wall of the second rotor plunger cylinder 18, as Figure 10As shown, the permanent magnet 32 is located within the permanent magnet slot 33. The air gap between the permanent magnet 32 and the winding 31 on the second pump body 16 is 2 mm. The width of the permanent magnet 32 is less than the width of the winding 31 on the second pump body 16 to ensure the driving stability of the electromagnetic torque. The constant magnetic field generated by the permanent magnet 32 interacts with the rotating magnetic field generated by the winding 31 on the second pump body 16 to generate an electromagnetic torque, driving the second rotor plunger cylinder 18 to start rotating from rest.

[0046] As Figure 8 shown, the winding 31 on the second pump body 16 generates a rotating magnetic field under the action of three-phase electricity. The second rotor plunger cylinder 18 generates a constant magnetic field. The constant magnetic field generates an electromagnetic torque under the action of the continuously changing rotating magnetic field of the second pump body 16, driving the second rotor plunger cylinder 18 to rotate, thereby realizing the rotation of the cylinder block 17. The principle of its magnetic field distribution is as Figure 11 shown, the second swash plate 22 is fixed inside the second pump body 16, and its end is stuck in the slot of the adjusting shaft 27. When the adjusting shaft 27 moves axially, the second swash plate 22 also rotates accordingly. By rotating the knob 30, the distance between the transmission shaft 29 and the adjusting shaft 27 is changed, causing the axial displacement of the adjusting shaft 27 to change. By adjusting the axial displacement of the adjusting shaft 27, the inclination angle of the second swash plate 22 is changed, causing the volume inside each plunger chamber to change. Thus, the second plunger 19 and the second slipper 21 both rotate. Since the end of the second plunger 19 always abuts against the second swash plate 22 through the second slipper 21, oil can be continuously sucked and discharged in a cycle.

[0047] The third mounting end of the cylinder block 17 is provided with a plunger chamber. The mounting end of the second plunger 19 is located inside the plunger chamber. The spherical end of the second plunger 19 is connected to the circumferential mounting end of the second plunger support assembly 20 and the sliding end of the second slipper 21. The fixed end of the second slipper 21 is connected to the first end of the second swash plate 22. The second end of the second swash plate 22 is connected to the second mounting end of the top cover 24. The mounting end of the meter head 26 passes through the mounting end of the pointer 25 and the third mounting end of the top cover 24. By rotating the knob 30, the meter head 26 adjusts the axial movement of the adjusting shaft 27, which can cause a change in the pointer 25, visually expressing the change in the oil suction and discharge volume on the meter head 26, and thus visually obtaining the oil volume information.

[0048] Further, the reciprocating motion of the second plunger 19 within the plunger cavity causes a change in volume, thereby achieving oil suction and discharge; the spherical end of the second plunger 19 and the second slipper 21 form a friction pair to ensure the stability of the second plunger 19 during rotation on the second swash plate 22. Since the second plunger 19 and the second slipper 21 are internally provided with channels, the oil flows through the interior of the second plunger 19 to form a hydrostatic support, causing it to closely adhere to the surface of the second swash plate 22. The oil flow forms a hydrostatic support, causing the second slipper 21 to closely adhere to the second swash plate 22. The second plunger support assembly 20 is circular, and the through holes on the second plunger 19 and the second plunger support assembly 20 are coaxially fitted. The second swash plate 22 can deflect around the second pump body 16 within a certain inclination range, and the adjustment shaft 27 of the second swash plate 22 is vertically distributed.

[0049] The first end of the adjustment shaft 27 is connected to the third end of the second swash plate 22. The second end of the adjustment shaft 27 passes through the first end of the end cover 28 and is connected to the long threaded end of the transmission shaft 29 by a thread. The short threaded end of the transmission shaft 29 is connected to the knob 30. When relative rotation occurs between the threads, the adjustment shaft 27 can be axially extended or retracted. The short threaded end of the transmission shaft 29 rotates together with the knob 30, causing axial movement of the adjustment shaft 27. Therefore, the rotation of the knob 30 drives the second swash plate 22 to change the inclination angle, thereby changing the oil suction and discharge volume. The second end of the end cover 28 is connected to the fourth mounting end of the top cover 24. The top cover 24 is circumferentially provided with threaded holes at the two end faces connected to the adjustment shaft 27 and is sealed by bolts. A through hole is provided at the central part of the end cover 28 where the transmission shaft 29 extends, facilitating the transmission shaft 29 to pass through and cooperate with the knob 30. And a sealing washer 23 is placed at the connection between the end cover 28 and the top cover 24.

[0050] Specifically, the second pump body 16 is successively provided with an oil suction hole, an oil discharge hole, and a stator wiring hole. The oil suction hole and the oil discharge hole are symmetrically distributed, and the oil suction hole and the oil discharge hole realize the functions of oil suction and discharge. The stator wiring hole is used to connect to an external current. The second plunger 19, the second slipper 21, and the second plunger support 20 form a plunger assembly.

[0051] In a preferred embodiment of the present invention, the axes of the plunger cylinder support shaft, the cylinder block 17, the second rotor plunger cylinder 18, the second plunger support 20, the second swash plate 22, and the top cover 24 of the second pump body 16 are on the same straight line, and the axes of the adjustment shaft 27, the end cover 28, the transmission shaft 29, and the knob 30 are on the same straight line.

[0052] The following further describes a motor plunger pump based on electromagnetic force drive according to the present invention with reference to embodiments:

[0053] The motor plunger pump driven by electromagnetic force of the present invention can not only be used as a water pump or an oil pump, but also as a positive pressure air pump or a vacuum pump, making it a multi-purpose motor pump. The overall design of the motor plunger pump adopts a tight-fitting method, which is not easy to separate during the production process, facilitating the improvement of production efficiency. Except for the structure that acts as the stator and rotor and needs to generate electromagnetic force, the rest of the structures are made of non-magnetic materials such as stainless steel or brass, ensuring the smooth and reliable movement. It is filled and fixed with resin material and polished smoothly, which not only ensures the smooth progress of the conductive work, but also has the characteristics of good flow forming, not easy to deform and stable dimensions due to the injection molding product, ensuring the safe and stable characteristics of the product and effectively ensuring the qualification rate.

[0054] In this embodiment, the motor plunger pump is applied to the 3000mm rolling mill in the medium plate mill. Since this rolling mill needs to provide a working pressure of 25MPa to meet the normal production requirements during normal production, and currently the pressure of this rolling mill is on the low side and cannot work well. The main reason is that the current plunger pump needs to be connected to an external motor through a coupling, and a part of the power transmitted from the external motor to the drive shaft of the plunger pump needs to be spent to overcome the frictional losses of the bearings and sealing devices first, and the remaining power is used to drive the rotation of the plunger pump cylinder 17, resulting in serious energy loss and unable to provide the required pressure for the rolling mill. However, the present invention avoids the disadvantage of the traditional plunger pump that needs an external motor to drive the drive shaft 29 in the system, and only relies on the electromagnetic force generated by the winding 31 to drive the plunger cylinder to rotate, reducing the energy loss driven by the drive shaft 29 in the case of reducing the external motor. At the same time, the size of the oil suction and discharge volume can be adjusted, and it can be applied to the hydraulic system of this rolling mill to meet the actual production requirements.

[0055] The specific working process of the motor plunger pump is as follows:

[0056] S1. Wind the winding 31 on the magnetic column of the pump body and apply alternating current. When the windings 31 on the pump body (each differing by 120 electrical degrees) are applied with symmetric three-phase symmetric alternating current, a rotating magnetic field is generated that rotates in the clockwise direction along the inner circle space of the winding 31 on the pump body and the winding 31 on the rotor plunger cylinder at a synchronous speed. Since the rotating magnetic field rotates at a certain speed and the winding 31 on the rotor plunger cylinder is initially stationary, the rotating magnetic field cuts the winding 31 on the rotor plunger cylinder, and the winding 31 on the rotor plunger cylinder will cut the rotating magnetic field to generate an induced electromotive force.

[0057] Under the action of the induced electromotive force, an induced current that is basically in the same direction as the induced electromotive force will be generated in the winding 31 on the rotor plunger cylinder. The current-carrying conductor of the winding 31 on the rotor plunger cylinder is subjected to the action of electromagnetic force in the magnetic field of the winding 31 on the pump body, and the electromagnetic force generates an electromagnetic torque on the winding 31 on the rotor plunger cylinder, driving the winding 31 on the rotor plunger cylinder to rotate along the direction of the rotating magnetic field.

[0058] S2. Thicken the exterior of the rotor plunger cylinder and machine grooves on it, and wind the winding 31. The winding 31 on the rotor plunger cylinder is similar to the winding 31 on the pump body and is also a symmetric three-phase winding, generally connected in star. The coils of the winding 31 are connected to the slip rings of the support shaft and then connected to the external circuit starting control device through brushes. The resistance of the circuit of the winding 31 on the rotor plunger cylinder can be increased through an external device, so as to have a better resistance during startup, thus making its torque higher. At the same time, it can prevent the wires from getting entangled during the rotation of the rotor plunger cylinder. The current-carrying winding 31 on the rotor plunger cylinder will generate electromagnetic force under the action of the rotating magnetic field of the winding 31 on the pump body, thus forming an electromagnetic torque on the motor shaft.

[0059] S3. Since the plungers are circumferentially distributed and the sealed volumes formed by the internal plungers and the cylinder block 17 are different, when current is applied, the interaction between the winding 31 on the pump body and the winding 31 on the rotor plunger cylinder generates an electromagnetic torque to make the plunger cylinder rotate. The volumes formed by each plunger and the plunger cylinder also continuously change. When the volume becomes larger, the pressure becomes smaller, and the hydraulic oil is sucked in through the oil suction port; when the volume becomes smaller, the pressure becomes larger, and the hydraulic oil is pushed out from the oil discharge port. When the power is continuously applied, the plunger cylinder can rotate continuously, and the oil suction and oil discharge actions of the plunger pump are completed by relying on the electromagnetic force.

[0060] The embodiments described above are only descriptions of the preferred embodiments of the present invention and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present invention shall fall within the protection scope determined by the claims of the present invention.

Claims

1. An electromagnetic force-driven motor plunger pump, characterized in that, it includes a first pump body, a distribution ring, an inner sliding ring, an outer sliding ring, a first rotor plunger cylinder, a first plunger, an axial support spring, a steel ball, a spring support, a first slipper, a first plunger support, a first swash plate and a rear end cover, the outer wall mounting end of the first pump body is connected to the first mounting end of the rear end cover through a sealing ring, magnetic columns are circumferentially arranged on the inner wall of the first pump body, windings are arranged on the magnetic columns, a rotor support shaft is arranged at the center inside the first pump body, the mounting end of the distribution ring is connected to the inner wall mounting end of the first pump body, the first end of the inner sliding ring is connected to the first mounting end of the rotor support shaft, the first mounting end of the outer sliding ring is connected to the inner mounting end inside the first rotor plunger cylinder, and the second end of the inner sliding ring is connected to the second end of the outer sliding ring; the middle mounting end of the first rotor plunger cylinder is connected to the second mounting end of the rotor support shaft, magnetic columns are circumferentially arranged on the outer wall of the first rotor plunger cylinder, windings are passed through the magnetic columns, the windings on the first pump body and the windings on the first rotor plunger cylinder form an electromagnetic field to drive the plunger pump to rotate, a plunger cavity is arranged at the first end of the first rotor plunger cylinder, the mounting end of the first plunger is located inside the plunger cavity, the spherical end of the first plunger is connected to the movable end of the first slipper through the circumferential mounting end of the first plunger support, the fixed end of the first slipper is connected to the first end of the first swash plate, the second end of the first swash plate is connected to the second mounting end of the rear end cover through a cylindrical pin, the first end of the axial support spring is connected to the mounting end inside the rotor support shaft, the second end of the axial support spring is connected to the first end of the spring support and the steel ball support through a spring support, and the second end of the steel ball support is connected to the central mounting end of the first plunger support through a steel ball.

2. The electromagnetic force-driven motor plunger pump according to claim 1, characterized in that, the first pump body is successively provided with an oil inlet hole, an oil outlet hole, an oil drain hole, an inner ring wiring hole of the sliding ring and a stator wiring hole, and the distribution ring is respectively provided with two oil grooves corresponding to the oil inlet hole and the oil outlet hole on the first pump body.

3. The electromagnetic force-driven motor plunger pump according to claim 2, characterized in that, the second end of the first rotor plunger cylinder is provided with an oil hole communicated with the oil groove on the distribution ring.

4. The electromagnetic force-driven motor plunger pump according to claim 1, characterized in that, the axes of the rotor support shaft of the first pump body, the distribution ring, the inner sliding ring, the outer sliding ring, the first rotor plunger cylinder, the axial support spring, the spring support, the steel ball support, the steel ball, the first plunger support, the first swash plate and the rear end cover are on the same straight line.

5. The electromagnetic force-driven motor plunger pump according to claim 1, characterized in that, The plunger cavity of the first rotor plunger cylinder, the first plunger, the first slipper, the axial support spring, the spring support, the ball support, the ball, the first plunger support and the first swash plate form a piston assembly.

6. An electromagnetic force-driven motor plunger pump, characterized in that it includes a second pump body, a cylinder block, a second rotor plunger cylinder, a second plunger, a second plunger support, a second slipper, a second swash plate, a top cover, a pointer, a meter head, an adjusting shaft, an end cover, a transmission shaft, a knob and a permanent magnet. The mounting end of the second pump body is connected to the first mounting end of the top cover through a sealing gasket. Magnetic posts are circumferentially arranged on the inner wall of the second pump body, and windings are arranged on the magnetic posts. A plunger cylinder support shaft is arranged at the center inside the second pump body, and the plunger cylinder support shaft is connected to the first mounting end of the cylinder block. The second mounting end of the cylinder block is connected to the mounting end of the second rotor plunger cylinder. A permanent magnet groove is circumferentially arranged on the outer wall of the second rotor plunger cylinder, and the permanent magnet is located in the permanent magnet groove. The winding on the second pump body generates a rotating magnetic field, and the second rotor plunger cylinder generates a constant magnetic field. The constant magnetic field drives the second rotor plunger cylinder to rotate under the action of the continuously changing rotating magnetic field of the second pump body, thereby realizing the rotation of the cylinder block. A plunger cavity is arranged at the third mounting end of the cylinder block. The mounting end of the second plunger is located inside the plunger cavity. The spherical end of the second plunger is connected to the sliding end of the second slipper through the circumferential mounting end of the second plunger support assembly. The fixed end of the second slipper is connected to the first end of the second swash plate. The second end of the second swash plate is connected to the second mounting end of the top cover. The mounting end of the meter head passes through the mounting end of the pointer and is connected to the third mounting end of the top cover. The first end of the adjusting shaft is connected to the third end of the second swash plate. The second end of the adjusting shaft passes through the first end of the end cover and is connected to the first end of the transmission shaft. The second end of the transmission shaft is connected to the knob. The second end of the end cover is connected to the fourth mounting end of the top cover.

7. The electromagnetic force-driven motor plunger pump according to claim 6, characterized in that an oil suction hole, an oil discharge hole and a stator wiring hole are sequentially arranged on the second pump body.

8. The electromagnetic force-driven motor plunger pump according to claim 6, characterized in that the second plunger, the second slipper and the second plunger support form a plunger assembly.

9. The electromagnetic force-driven motor plunger pump according to claim 6, characterized in that the axes of the plunger cylinder support shaft of the second pump body, the cylinder block, the second rotor plunger cylinder, the second plunger support, the second swash plate and the top cover are on the same straight line, and the axes of the adjusting shaft, the end cover, the transmission shaft and the knob are on the same straight line.

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