CN218030664U

CN218030664U - Permanent magnet synchronous axial-flow type electromagnetic pump

Info

Publication number: CN218030664U
Application number: CN202220028323.1U
Authority: CN
Inventors: 张洪信; 田东; 姜勇; 衣鹏; 郑晓钦; 张铁柱
Original assignee: Qingdao University
Current assignee: Qingdao University
Priority date: 2022-01-06
Filing date: 2022-01-06
Publication date: 2022-12-13
Anticipated expiration: 2032-01-06

Abstract

The utility model discloses a permanent magnet synchronous axial flow type electromagnetic pump, which comprises a stator component, a rotor component, a rear cover plate, a casing, a front cover plate and a bearing; the rotor assembly comprises a blade mandrel, blades, a permanent magnet and a blade outer barrel; the casing is the tubular structure, back shroud and front shroud fix respectively and form cylindric cavity at the front and back both sides opening part of tubular casing, stator module, active cell subassembly and casing set up with the axle center, annular stator module is fixed near cylindric cavity inner wall, active cell subassembly arrange in stator module and with stator module between have certain movement clearance, active cell subassembly both ends are respectively through bearing and back shroud and front shroud rotation sealing connection, a plurality of permanent magnet evenly arranges along blade urceolus outer wall circumference in the upper direction, blade and blade spindle that blade urceolus inner wall evenly arranged through a plurality of circumference are connected, fluid entry and the fluid export with cylindric cavity intercommunication are seted up respectively in back shroud and the front shroud middle part. The volume is small, and the operation efficiency is high.

Description

Permanent magnet synchronous axial flow type electromagnetic pump

The technical field is as follows:

the utility model belongs to the technical field of the electromagnetic pump, concretely relates to synchronous axial-flow type electromagnetic pump of permanent magnetism can be applied to the work occasion of current like pump, reduces the volume, improves the operating efficiency.

Background art:

at present, the existing fluid power devices such as a fan, a water pump, an oil pump and the like are very commonly applied, and almost more than 30% of the total electricity consumption of human beings is consumed. In a conventional axial flow fluid power device, an axial flow blade is driven by a motor to rotate in a pipeline, so as to drive fluid to enter from one end and discharge from the other end. The main disadvantages of the above system are: the motor generates large flow resistance loss to fluid; the clearance between the blade and the inner wall of the pipeline is large, the internal leakage and the fluid backflow are large, and the system efficiency is low. The electromagnetic pump can solve the problems to a certain extent, for example, patent cn201120327271.X discloses a direct-drive electromagnetic pump, which mainly comprises a motor shell, a motor stator iron core, a motor stator winding, a motor rear end cover, a motor shaft, a motor rear bearing, a connecting key, a motor rotor iron core, permanent magnetic steel, a motor front bearing, an isolating sleeve, a motor front end cover, a gland nut, an impeller, a sealing ring and a pump shell. The stator iron core is pressed into the motor shell after being laminated, and the stator winding is placed in the stator iron core. The rotor iron core is pressed on a motor shaft after being laminated, permanent magnetic steel is installed on the rotor iron core, a key groove is formed in the motor shaft, a connecting key is arranged on the motor shaft, the torsion borne by the motor iron core is transmitted to the motor shaft, the motor shaft is connected with an impeller and fixed by a compression nut, the impeller rotates along with the motor shaft to pump liquid, an isolation sleeve is a key part of a direct-drive electromagnetic pump and is of a cylindrical structure, the outer edge of the isolation sleeve is respectively connected with a motor shell and a motor front end cover, the phenomenon that the conveying liquid enters a motor stator and is prevented from leaking is avoided, a motor rear bearing is fixed inside the isolation sleeve and is used for supporting the weight of a motor rotor and the weight of the impeller together with a motor front bearing arranged on the motor front end cover, the motor rear end cover plays a protection role on a motor, and a pump shell is used for guiding and conveying the liquid besides being connected with the motor part; patent CN202021978323.5 discloses a permanent magnet synchronous electromagnetic pump, which comprises a shell structure, a stator structure, a rotor structure and an impeller, wherein the shell structure is provided with a water inlet and a water outlet, a water inlet cavity, a water outlet cavity and a rotor cavity are arranged in the shell structure, the water inlet cavity, the water outlet cavity and the rotor cavity are communicated in the shell structure, the water inlet is connected with the water inlet cavity, the water outlet is connected with the water outlet cavity, the rotor structure is arranged in the rotor cavity, the rotor structure is internally provided with a rotating shaft, a plastic rotor and a magnetic core, the impeller is arranged in the water inlet cavity and is connected with the rotor structure, the water inlet and the rotating shaft are positioned on the same straight line, the stator structure is arranged in the shell structure and sleeved outside the rotor cavity, the impeller and the rotor structure are integrated, a magnetic core in the rotor structure is wrapped by a plastic rotor and is arranged at the rear section of the rotating shaft far away from the water inlet, the plastic rotor is provided with a filter disc with water holes at the front section of the rotor cavity close to the water inlet direction, the outer wall of the magnetic core part in the rotor structure is provided with an axial shock absorption block, a gap is reserved between the shock absorption block and the inner wall of the rotor cavity, the shock absorption blocks are provided with a plurality of blocks, intervals are reserved among the shock absorption blocks, the shock absorption blocks are made of shock absorption materials, when the water-saving device works, the stator winding is electrified to form a magnetic field, the magnetic core is arranged in the rotor structure, the magnetic core rotates under the action of the magnetic field to drive the rotor structure and the impeller to rotate, the impeller rapidly rotates in water to form a negative pressure environment, so that water rushes into the water inlet cavity from the water inlet, and provides a thrust force for water in the rotation process of the impeller, so that the water is pushed into the water outlet cavity and is discharged out of the electromagnetic pump through the water outlet. However, the electromagnetic pump is radial in overall structure, fluid enters a pump cavity and accelerates radially to form pressure, and then is output outwards, the blades are located at one end of the overall structure of the electromagnetic pump, the length of the pump body is increased on the aspect, in addition, the internal eddy loss of the fluid is too large, and the overall efficiency is reduced.

The utility model has the following contents:

the utility model aims to seek a permanent magnet synchronous axial flow electromagnetic pump with simpler structure, which integrates the traditional permanent magnet synchronous motor with axial flow blades, and the outer edges of the blades are connected with the wall surface of a flow channel and rotate together to reduce the internal leakage and backflow of fluid; the periphery of the flow channel is provided with an electrodynamic force structure of the permanent magnet synchronous motor, alternating voltage is applied to the three winding wires to generate a rotating magnetic field, the rotating magnetic field and the magnetic field of the permanent magnet interact to generate electromagnetic torque, the blades are driven to rotate synchronously with the electromagnetic field, fluid is sucked and axially pushed, and then fluid power is output, so that the fluid power device which is free of a distributing valve, compact in structure, high in speed and high in efficiency is formed.

In order to achieve the above object, the present invention relates to a permanent magnet synchronous axial flow electromagnetic pump, the main structure of which comprises a stator assembly, a rotor assembly, a back cover plate, a casing, a front cover plate and a bearing; the rotor assembly comprises a blade mandrel, blades, a permanent magnet and a blade outer barrel; the casing is the tubular structure, back shroud and front shroud fix respectively and form cylindric cavity at the front and back both sides opening part of tubular casing, stator module, active cell subassembly and casing set up with the axle center, annular stator module is fixed near cylindric cavity inner wall, active cell subassembly arrange in stator module and with stator module between have certain movement clearance, active cell subassembly both ends are respectively through bearing and back shroud and front shroud rotation sealing connection, a plurality of permanent magnet evenly arranges along blade urceolus outer wall circumference in the upper direction, blade and blade spindle that blade urceolus inner wall evenly arranged through a plurality of circumference are connected, fluid entry and the fluid export with cylindric cavity intercommunication are seted up respectively in back shroud and the front shroud middle part.

The utility model relates to a blade has certain inclination in the axial.

The utility model relates to a blade mandrel middle part is cylindrical, and both ends are the taper, around the blade mandrel both ends respectively with front shroud and back shroud between have the certain distance.

The utility model relates to a permanent magnet distributes uniformly in the periphery of blade urceolus.

The utility model relates to a back shroud and front shroud inboard all are equipped with annular bearing housing hole, and the bearing is fixed at the bearing housing downthehole, and blade urceolus outer wall both ends are connected with bearing inner race transition fit, and both ends face is close to front shroud and back shroud inner wall respectively around the blade urceolus.

The utility model relates to a stator module includes stator core and stator winding, and stator core is the loop configuration that silicon steel sheet coincide formed, or other soft magnetic material, and a plurality of slotted hole are evenly seted up to stator core inner wall circumference, and the stator winding installation is fixed in the slotted hole.

The utility model relates to a front shroud and back shroud pass through fasteners such as bolts and casing front end fastening connection.

Compared with the prior art, the utility model following beneficial effect has: the internal space of the shell is divided into two independent chambers through the blade outer cylinder: the fluid only flows in the cylindrical cavity, the electromagnetic structure is arranged in the annular cavity, the fluid and the electromagnetic structure are isolated, and the influence of the fluid on the electromagnetic structure is avoided; the electromagnetic structure, the axial flow blades and the like are integrated into a whole, and the rotor rotates and drives the blades to rotate at the same time to drive fluid to axially flow; the whole device has compact structure, high volume efficiency, reliable work, high-speed work and higher popularization and application value.

Description of the drawings:

fig. 1 is a schematic longitudinal sectional view of a permanent magnet synchronous axial flow electromagnetic pump according to embodiment 1.

Fig. 2 is a schematic cross-sectional view of a permanent magnet synchronous axial-flow electromagnetic pump according to embodiment 1.

The specific implementation mode is as follows:

the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiment of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention.

Example 1:

the main structure of the permanent magnet synchronous axial flow electromagnetic pump related to the embodiment comprises a stator component, a rotor component, a rear cover plate 3, a casing 4, a front cover plate 8 and a bearing 9; the stator assembly comprises a stator core 6 and a stator winding 7, and the rotor assembly comprises a blade mandrel 1, blades 2, a permanent magnet 5 and a blade outer barrel 10; the casing 4 is a tubular structure, the back cover plate 3 and the front cover plate 8 are respectively fixed at the front and back openings of the tubular casing 4 to form cylindrical cavities, the stator assembly, the rotor assembly and the casing 4 are coaxially arranged, the annular stator assembly is fixed close to the inner wall of the cylindrical cavity, the rotor assembly is arranged in the stator assembly and has a certain movement gap with the stator assembly, two ends of the rotor assembly are respectively connected with the back cover plate 3 and the front cover plate 8 in a rotating and sealing mode through bearings 9, a plurality of permanent magnets 5 are uniformly arranged on the periphery of the outer wall of the blade outer barrel 10, the inner wall of the blade outer barrel 10 is connected with the blade mandrel 1 through a plurality of blades 2 uniformly arranged on the periphery, a fluid inlet and a fluid outlet communicated with the cylindrical cavities are respectively arranged in the middle parts of the back cover plate 3 and the front cover plate 8, after the stator assembly is connected with electricity, a rotating magnetic field is generated in the cylindrical cavities, the blades on the rotor assembly are driven to rotate, and fluid is sucked.

The blade 2 that this embodiment relates to has certain inclination in the axial, and when the active cell subassembly rotated of being convenient for, fluid can get into from the fluid entry of apron 8, through blade 2 along the axial propelling movement, discharges from the fluid export of back shroud 3.

The middle part of the blade mandrel 1 related to the embodiment is cylindrical, two ends of the blade mandrel are conical so as to reduce the fluid resistance, and the front end and the rear end of the blade mandrel 1 are respectively spaced from the front cover plate 8 and the rear cover plate 3, so that the fluid can flow in and out conveniently.

The permanent magnets 5 according to the embodiment are uniformly distributed on the periphery of the blade outer cylinder 10 to form an integral multiple of pole pairs, the permanent magnets 5 can be connected with the blade outer cylinder 10 in a bonding mode, a bolt connection mode and the like, and a magnet sheath can be arranged to fasten the permanent magnets 5 and the blade outer cylinder 10 into a whole.

The inner sides of the rear cover plate 3 and the front cover plate 8 related to the embodiment are respectively provided with an annular bearing seat hole, the bearing 9 is fixed in the bearing seat hole, two ends of the outer wall of the blade outer cylinder 10 are in transition fit connection with the inner ring of the bearing 9, and the front end face and the rear end face of the blade outer cylinder 10 are respectively close to the inner walls of the front cover plate 8 and the rear cover plate 3.

The stator module that this embodiment relates to includes stator core 6 and stator winding 7, and stator core 6 is the annular structure that silicon steel sheet coincide formed, or other soft magnetic material, and a plurality of slotted holes are evenly seted up to 6 inner walls week of stator core, and stator winding 7 is installed and is fixed in the slotted hole. The stator winding 7 is a three-phase winding and can be in a lap winding or wave winding form.

The housing 4 according to the present embodiment can be embedded in other base bodies or connected to other base bodies through a base.

The front cover plate 8 and the rear cover plate 3 according to the present embodiment are fastened to the front end of the housing 4 by fasteners such as bolts.

The specific working process of the permanent magnet synchronous axial flow type electromagnetic pump comprises the following steps: alternating voltage is applied to the stator winding 7, alternating current is generated in the stator winding 7, a rotating magnetic field is further generated in the stator core 6, the rotating magnetic field and the permanent magnet 5 act to generate electromagnetic torque, and the rotor assembly is driven to rotate synchronously with the rotating magnetic field. When the rotor component rotates, fluid enters from the fluid inlet and flows out from the fluid outlet under the axial pushing of the blades 2, so that the fluid power is continuously output outwards, and the electric energy is converted into fluid pressure energy.

In the embodiment, the space in the casing 4 is divided into two independent chambers by the blade outer cylinder 11, a cylindrical cavity is formed in the middle of the blade outer cylinder 10, and an annular cavity is formed by the blade outer cylinder 10 and the casing 4 in a surrounding manner, fluid only flows in the cylindrical cavity, and the electromagnetic structure is arranged in the annular cavity to isolate the fluid from the electromagnetic structure, so that the influence of the fluid on the electromagnetic structure is avoided; the electromagnetic structure, the axial flow blades and the like are integrated into a whole, and the rotor rotates and simultaneously drives the blades 2 to rotate so as to drive fluid to flow; the whole device has compact structure, the volume efficiency is improved by more than 15%, the operation is reliable, the operation speed is improved by more than 20% compared with the prior art, and the device has higher popularization and application values.

Claims

1. A permanent magnet synchronous axial flow type electromagnetic pump is characterized in that a main structure comprises a stator component, a rotor component, a rear cover plate, a casing, a front cover plate and a bearing; the rotor assembly comprises a blade mandrel, blades, a permanent magnet and a blade outer barrel; the casing is the tubular structure, back shroud and front shroud fix respectively and form cylindric cavity at the front and back both sides opening part of tubular casing, stator module, active cell subassembly and casing set up with the axle center, annular stator module is fixed near cylindric cavity inner wall, active cell subassembly arrange in stator module and with stator module between have certain movement clearance, active cell subassembly both ends are respectively through bearing and back shroud and front shroud rotation sealing connection, a plurality of permanent magnet evenly arranges along blade urceolus outer wall circumference in the upper direction, blade and blade spindle that blade urceolus inner wall evenly arranged through a plurality of circumference are connected, fluid entry and the fluid export with cylindric cavity intercommunication are seted up respectively in back shroud and the front shroud middle part.

2. The permanent magnet synchronous axial flow electromagnetic pump of claim 1, wherein the blades are inclined at an angle in the axial direction.

3. The permanent magnet synchronous axial flow electromagnetic pump according to claim 1, wherein the central portion of the vane spindle is cylindrical, both ends of the vane spindle are tapered, and the front end and the rear end of the vane spindle are respectively spaced from the front cover plate and the rear cover plate.

4. The permanent magnet synchronous axial flow electromagnetic pump of claim 1, wherein the permanent magnets are evenly distributed on the outer circumference of the outer barrel of the blade.

5. The permanent magnet synchronous axial flow electromagnetic pump according to claim 1, wherein the inner sides of the back cover plate and the front cover plate are provided with annular bearing seat holes, the bearing is fixed in the bearing seat hole, two ends of the outer wall of the outer blade cylinder are in transition fit connection with the inner ring of the bearing, and the front end face and the rear end face of the outer blade cylinder are respectively close to the inner walls of the front cover plate and the back cover plate.

6. The permanent magnet synchronous axial flow electromagnetic pump according to claim 1, wherein the stator assembly includes a stator core and a stator winding, the stator core is an annular structure formed by laminating silicon steel sheets or other soft magnetic materials, a plurality of slots are uniformly formed in the circumferential direction of the inner wall of the stator core, and the stator winding is installed and fixed in the slots.

7. The permanent magnet synchronous axial flow electromagnetic pump according to claim 1, wherein the front cover plate and the rear cover plate are fastened to the front end of the casing by fasteners such as bolts.