CN213585462U

CN213585462U - Vertically-installed oil-cooled permanent magnet synchronous motor and screw machine rotor all-in-one machine structure

Info

Publication number: CN213585462U
Application number: CN202022683327.7U
Authority: CN
Inventors: 李学军; 王荣众; 杨伟
Original assignee: Zhejiang Zhongyuan Electric Co ltd
Current assignee: Zhejiang Zhongyuan Electric Co ltd
Priority date: 2020-11-19
Filing date: 2020-11-19
Publication date: 2021-06-29
Anticipated expiration: 2030-11-19

Abstract

The utility model discloses a vertical oil-cooling permanent magnet synchronous motor and screw machine rotor integrated machine structure, which mainly comprises a screw machine and a permanent magnet synchronous motor in transmission connection with the screw machine, wherein the screw machine is vertically arranged in an installation bracket, and a male rotor and a female rotor which are mutually meshed are arranged in the screw machine; the permanent magnet synchronous motor comprises a base, a stator core winding and a rotor assembly, wherein the stator core winding and the rotor assembly are arranged in the base, the rotor assembly is in transmission connection with a male rotor and drives the male rotor to rotate, the base of the permanent magnet synchronous motor is arranged on the screw machine through a bolt and a transition flange, oil cooling channels which are mutually communicated are respectively arranged in the permanent magnet synchronous motor and the screw machine, and a filtering cooler which is communicated with the oil cooling channels and is used for filtering and cooling oil in the oil cooling channels is arranged between the permanent magnet synchronous motor and the screw machine; the rotor assembly mainly comprises a hollow shaft sleeve, a rotor core and a permanent magnet which are sleeved on the hollow shaft sleeve, and a rotor end plate and a core fixing ring which are arranged on the hollow shaft sleeve.

Description

Vertically-installed oil-cooled permanent magnet synchronous motor and screw machine rotor all-in-one machine structure

Technical Field

The utility model relates to a permanent-magnet machine technical field, concretely relates to erect and adorn cold PMSM of oil and screw rod machine rotor all-in-one structure.

Background

The permanent magnet motor has the advantages of simple structure, high force energy density, no excitation loss, high efficiency and the like, and has wide application prospect in the fields of high-speed grinding machines, air circulation refrigeration systems, high-speed centrifugal compressors, aerospace and the like. Compared with the common motor, the permanent magnet motor has the advantages that the rotating speed of the motor is up to tens of thousands of revolutions per minute or even hundreds of thousands of revolutions per minute, the peripheral speed can reach more than 200m/s, the friction between air and the surface of a rotor can bring great loss to the motor under the condition of high-speed rotation of the motor, the eddy current loss of a rotor permanent magnet can be great, the temperature of a rotor of the motor is too high, irreversible demagnetization can occur to the permanent magnet under the condition of too high temperature, serious harm is caused to the motor, the heat dissipation of the motor becomes one of the core problems of motor design, in addition, the structure of the existing permanent magnet motor is complex, and the motor is very inconvenient to install and disassemble.

Disclosure of Invention

The to-be-solved technical problem of the utility model lies in, to the above-mentioned defect of prior art, provide a safe and reliable, transmission efficiency is high, the cold PMSM of perpendicular dress oil and screw rod machine rotor all-in-one structure that stability is strong.

The utility model aims at solving the technical scheme that the integrated structure of the vertical oil-cooling permanent magnet synchronous motor and the screw machine rotor mainly comprises a screw machine and a permanent magnet synchronous motor in transmission connection with the screw machine, wherein the screw machine is vertically arranged in an installation bracket, and a male rotor and a female rotor which are meshed with each other are arranged in the screw machine; permanent magnet synchronous machine includes frame and sets up stator core winding and the rotor assembly in the frame, the rotor assembly is connected and drives the positive rotor and rotates with the positive rotor transmission, permanent magnet synchronous machine's frame passes through the bolt and the transition flange sets up on the screw rod machine, and permanent magnet synchronous machine and screw rod machine are provided with the oil cooling passageway of mutual intercommunication respectively, be provided with between permanent magnet synchronous machine and the screw rod machine with oil cooling passageway intercommunication and be used for filtering and the refrigerated filtration cooler to the coolant oil in the oil cooling passageway.

Further, the rotor assembly mainly includes hollow axle sleeve, cover and establishes rotor core and the embedded permanent magnet in the iron core inside on hollow axle sleeve, be provided with front end plate and back end plate on rotor core's the front and back both sides terminal surface respectively, be provided with the solid fixed ring of iron core that is used for preventing front and back end plate not hard up on the hollow axle sleeve, rotor core and hollow axle sleeve are through first connection long key circumference fixed connection.

Further, front end plate and back end plate are the copper, just a plurality of dynamic balance load balancing hole has all radially been seted up on front end plate and the back end plate.

Furthermore, the rotor assembly is fixedly connected with the extending shaft of the male rotor in the circumferential direction through a second connecting long key, the hollow shaft sleeve is in clearance fit with the extending shaft of the male rotor, and the fit clearance is 0.02-0.035 mm.

Furthermore, a key groove is formed in the protruding shaft of the male rotor of the screw machine, a locking screw hole used for locking and fixing the rotor assembly is formed in the end face of the protruding shaft, the key groove is formed in the hollow shaft sleeve, and a screw hole used for dismounting and mounting the rotor assembly is formed in the end face of the protruding shaft.

The utility model has the advantages of: the utility model has compact structure, the male rotor of the screw machine is integrated with the motor rotor, the motor oil cooling system is directly connected with the screw machine lubricating system, the structural integration of the motor and the screw machine head is really realized, the transmission efficiency is high, and the stability is strong; the vertical structure is adopted, the stability of the rotor rotation is stronger than that of a rotor rotation with a horizontal structure, the vibration value is small, and the service life of the whole machine is effectively prolonged.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is a schematic structural diagram of the rotor assembly of the present invention.

Detailed Description

To make the objects, technical solutions and advantages of the present invention more clearly understood by those skilled in the art, the present invention will be further described with reference to the accompanying drawings and examples.

In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "lateral", "vertical", and the like are the directions or positional relationships shown in the drawings, and are only for convenience of description of the present invention, and do not indicate or imply that the device or element referred to must have a specific direction, and therefore, should not be construed as limiting the present invention.

As shown in fig. 1-2, the structure of the vertical oil-cooling permanent magnet synchronous motor and screw machine rotor integrated machine of the present invention mainly comprises a screw machine 1 and a permanent magnet synchronous motor 2 in transmission connection with the screw machine 1, wherein the screw machine 1 is vertically arranged in a mounting bracket 3, and a male rotor 11 and a female rotor 12 which are engaged with each other are arranged in the screw machine 1; permanent magnet synchronous machine 2 includes frame 21 and sets up stator core winding 22 and rotor assembly 23 in frame 21, rotor assembly 23 is connected and drives positive rotor 11 son and rotates with positive rotor 11 transmission, permanent magnet synchronous machine 2's frame 21 passes through bolt and transition flange 4 setting and is in on the screw rod machine 1, and be provided with the oil cooling passageway 5 that communicates each other in permanent magnet synchronous machine 2 and the screw rod machine 1 respectively, be provided with between permanent magnet synchronous machine 2 and the screw rod machine 1 with oil cooling passageway 5 intercommunication and be used for filtering and the refrigerated filtration cooler to the coolant oil in the oil cooling passageway 5. The male rotor 11 and the motor rotor assembly 23 of the screw machine 1 are integrally arranged, and the motor oil cooling system is directly connected to the screw machine lubricating system, so that the structural integration of the permanent magnet synchronous motor 2 and the screw machine 1 is really realized, the transmission efficiency is high, and the stability is strong; the vertical structure is adopted, and the stability of the rotor rotation is stronger than that of a rotor rotation with a horizontal structure.

Referring to fig. 1-2, rotor assembly 23 mainly includes hollow shaft sleeve 232, the rotor core 233 who establishes on hollow shaft sleeve 232 and the embedded permanent magnet inside rotor core 233, be provided with front end plate 234 and rear end plate 235 on the front and back both sides terminal surface of rotor core 233 respectively, be provided with the solid fixed ring 236 of iron core that is used for preventing the front and back end plate not hard up on the hollow shaft sleeve 232, the solid fixed ring 236 of iron core has played and has prevented that the rotor end plate is not hard up, the loose effect of iron core, rotor core 233 and hollow shaft sleeve 232 are through first connection long key 237 fixed connection, and first connection long key 237 is used for circumference fixed rotor core 233 and hollow shaft sleeve 232, transmits rotary motion and moment of torsion, prevents that rotor core from beating to rotate relatively hollow shaft sleeve 232.

Referring to fig. 1-2, the front end plate 234 and the rear end plate 235 are both copper plates, and a plurality of dynamic balance weight-removing holes 6 are radially formed in the front end plate 234 and the rear end plate 235. The rotor end plate plays the effect of keeping out permanent magnet axial float, provides the heavy material that goes when also beating dynamic balance for the rotor, because the copper compares aluminum plate and has better heavy effect that goes, compares in addition and can reduce rotor eddy current loss, and eddy current loss can arouse the rotor intensification, and high temperature can cause the local demagnetization of permanent magnet, and the motor is inefficacy. The hollow shaft sleeve 232 is fixedly connected with the extending shaft of the male rotor 11 through a second connecting long key 238, the second connecting long key 238 is connected with the hollow shaft sleeve 232 and the extending shaft of the male rotor 11 of the screw machine 1, and the hollow shaft sleeve and the extending shaft are also fixed in the circumferential direction to transmit rotary motion and torque and prevent the hollow shaft sleeve 232 from rotating in the circumferential direction relative to the extending shaft; and the hollow shaft sleeve 232 is in clearance fit with the extension shaft of the male rotor, and the fit clearance is 0.02-0.035 mm. A locking base plate 7 and an inner hexagon bolt 8 for locking and fixing the rotor assembly are arranged on the end face of one side, away from the screw machine 1, of the hollow shaft sleeve 232, and a rotor locking screw hole 239 matched with the inner hexagon bolt 8 requires that the thread turning direction is opposite to the running direction of the machine; the hollow shaft sleeve 232 is provided with a screw hole 231 for rotor assembly disassembly and assembly, the rotor assembly is pulled out by screwing a long screw rod when the machine is disassembled, and a common disassembling tool cannot stretch into the inner part due to the small design air gap space of the stator and the rotor, so that the method is simple and convenient.

The assembly sequence of the structure of the all-in-one machine during installation is as follows: firstly, vertically assembling a screw machine on an installation support, and locking and fixing by virtue of a spigot and a bolt; then installing a transition flange, wherein a front inner seam allowance of the flange and a front outer seam allowance of the screw machine are positioned in a seam allowance matching mode and are locked by bolts, and the bolts penetrate from the flange end to a front cover of the machine head; and then installing the base, putting the base into an oven, heating for a period of time, allowing the base to thermally expand, then installing the stator core winding into the base, and waiting for the base to be naturally cooled. And assembling the cooled engine base on the transition flange, and locking by means of a spigot positioning bolt. And then assembling a rotor core assembly, as shown in fig. 2, pre-assembling the rotor core assembly, sleeving the rotor core assembly on an output shaft of a screw machine head, namely an extension shaft of the male rotor, wherein the rotor core assembly and the extension shaft are in clearance fit, the fit clearance is 0.02mm-0.035mm, realizing circumferential fixation through long key connection to transmit motion and torque, then locking and fixing the rotor core assembly by a locking base plate and an inner hexagon bolt, and applying fixed torque through adjustment of a torque wrench. In the process, the bolt needs to be coated with thread glue, and the thread rotating direction needs to be opposite to the rotating direction of the motor, so that the bolt cannot be loosened when the rotating shaft runs at a high speed; and finally, assembling the rear end cover, and performing dust sealing to meet the protection grade requirement of the whole machine.

The motor of the all-in-one machine structure is not provided with a front bearing and a rear bearing, so that the after-sale problem of the rear bearing is avoided, and the cost is reduced. Considering the ultra-high rotating speed design of the whole machine, the bearing model selection is originally a big difficulty, and even if a bearing meeting the requirement exists, the price is very high, so the integrated structure design firstly solves the problems; considering from the linkage form of the motor and the screw machine head, the integrated structure design is safe and reliable compared with a gear, a belt wheel, a coupler or any direct connection structure, the transmission efficiency is high, and the stability is strong; the vertical structure is adopted, compared with a horizontal structure, the rotor has strong rotation stability, the measured vibration value is small when the whole machine works, and the service life of the whole machine is prolonged. The motor adopts an oil cooling structure, and three aspects are considered, wherein one aspect is air cooling, the work of a fan inevitably generates certain power consumption and noise, and the whole size of the whole machine is lengthened; secondly, the oil cooling heat dissipation effect is really better than the air cooling effect, the cooling oil entity is closer to the stator core winding which generates heat when working, and the effect of blowing the outer surface is better than that of a fan; thirdly, considering that the lubrication of the screw head also needs to establish a lubrication system. Therefore, the cooling and lubricating are connected into one system, the structure is compact, the engine oil utilization rate is high, the heat dissipation requirement of the motor is met, and the screw machine head is lubricated. The structural design of the integrated machine meets the requirement of stable and efficient operation of the whole machine at ultrahigh rotating speed, the structural design is simple and compact, the purpose of reducing cost is achieved, and the aims of energy conservation, consumption reduction, cost reduction and efficiency improvement advocated by enterprise development are fulfilled.

The specific embodiments described herein are merely illustrative of the principles of the present invention and its efficacy, and are not intended to limit the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Therefore, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical idea of the present invention shall be covered by the claims of the present invention.

Claims

1. The utility model provides a perpendicular cold PMSM of dress oil and screw rod machine rotor all-in-one structure which characterized in that: the permanent magnet synchronous motor is in transmission connection with the screw machine, the screw machine is vertically arranged in the mounting bracket, and a male rotor and a female rotor which are meshed with each other are arranged in the screw machine; permanent magnet synchronous machine includes frame and sets up stator core winding and the rotor assembly in the frame, the rotor assembly is connected and drives the positive rotor and rotates with the positive rotor transmission, permanent magnet synchronous machine's frame passes through the bolt and the transition flange sets up on the screw rod machine, and permanent magnet synchronous machine and screw rod machine are provided with the oil cooling passageway of mutual intercommunication respectively, be provided with between permanent magnet synchronous machine and the screw rod machine with oil cooling passageway intercommunication and be used for filtering and the refrigerated filtration cooler to the coolant oil in the oil cooling passageway.

2. The vertical oil-cooling permanent magnet synchronous motor and screw machine rotor all-in-one machine structure according to claim 1, characterized in that: the rotor assembly mainly includes hollow axle sleeve, cover and establishes rotor core and the embedded permanent magnet in rotor core inside on hollow axle sleeve, be provided with front end plate and back end plate on rotor core's the front and back both sides terminal surface respectively, be provided with the solid fixed ring of iron core that is used for preventing front and back end plate not hard up on the hollow axle sleeve, rotor core and hollow axle sleeve are through first connection long key circumference fixed connection.

3. The vertically-installed oil-cooled permanent magnet synchronous motor and screw machine rotor all-in-one machine structure according to claim 2, characterized in that: the front end plate and the rear end plate are copper plates, and a plurality of dynamic balance weight removing holes are radially formed in the front end plate and the rear end plate.

4. The vertical oil-cooling permanent magnet synchronous motor and screw machine rotor all-in-one machine structure according to claim 2 or 3, characterized in that: the rotor assembly is fixedly connected with the extending shaft of the male rotor in the circumferential direction through the second connecting long key, the hollow shaft sleeve is in clearance fit with the extending shaft of the male rotor, and the fit clearance is 0.02-0.035 mm.

5. The vertically-installed oil-cooled permanent magnet synchronous motor and screw machine rotor all-in-one machine structure according to claim 4, characterized in that: the screw machine male rotor extension shaft is provided with a key groove, the end face is provided with a locking screw hole for locking and fixing the rotor assembly, and the hollow shaft sleeve is provided with the key groove and the end face is provided with a screw hole for dismounting and mounting the rotor assembly.