CN110417133B - Front-mounted disc type ultrathin permanent magnet synchronous traction machine of encoder - Google Patents

Front-mounted disc type ultrathin permanent magnet synchronous traction machine of encoder Download PDF

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Publication number
CN110417133B
CN110417133B CN201910643663.8A CN201910643663A CN110417133B CN 110417133 B CN110417133 B CN 110417133B CN 201910643663 A CN201910643663 A CN 201910643663A CN 110417133 B CN110417133 B CN 110417133B
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China
Prior art keywords
encoder
rotor
supporting seat
bearing
shaft
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CN201910643663.8A
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Chinese (zh)
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CN110417133A (en
Inventor
沈寅
王亮
简显科
李美光
李小兵
施群鸿
赵亚南
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HANGZHOU AOLIDA ELEVATOR Co.,Ltd.
Original Assignee
Kinetek Desheng Motor Foshan Shunde Co ltd
Hangzhou Aolida Elevator Co ltd
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Priority to CN201910643663.8A priority Critical patent/CN110417133B/en
Publication of CN110417133A publication Critical patent/CN110417133A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B11/00—Main component parts of lifts in, or associated with, buildings or other structures
    • B66B11/04—Driving gear ; Details thereof, e.g. seals
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H02K1/2786—Outer rotors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
    • H02K11/21—Devices for sensing speed or position, or actuated thereby
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
    • H02K5/161—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields radially supporting the rotary shaft at both ends of the rotor
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
    • H02K5/173—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings
    • H02K5/1732—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings radially supporting the rotary shaft at both ends of the rotor
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/18—Casings or enclosures characterised by the shape, form or construction thereof with ribs or fins for improving heat transfer
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans

Abstract

The invention discloses a front-mounted disc type ultrathin permanent magnet synchronous traction machine with an encoder, which comprises a machine base (10), wherein a stator (11) is arranged on the machine base (10); the magnetic field generator further comprises a rotor (20), wherein a magnet (21) which covers the coil of the stator (11) and forms a radial magnetic field with the coil is arranged on the rotor (20); the rotor (20) is a disc-shaped shell with one end protruding, a shaft (22) which is rotationally matched with the machine base (10) is arranged on the inner side of the protruding part of the rotor (20), a front bearing and a rear bearing are arranged on the shaft (22), and a traction wheel (30) is arranged on the outer side of the protruding part of the rotor (20); also included are a brake (40) and an encoder (50) cooperating with the rotor (20). The invention has the characteristics of reasonable stress, low cost, high strength, long service life, capability of being disassembled on site and the like, thin thickness and high utilization rate of the well.

Description

Front-mounted disc type ultrathin permanent magnet synchronous traction machine of encoder
Technical Field
The invention relates to an elevator permanent magnet synchronous traction machine, in particular to a disk type ultrathin permanent magnet synchronous traction machine with a front-mounted encoder.
Background
The hoisting machine is the power equipment of the elevator. The OneCardi Tongli company invented the EcoDisc disc type permanent magnet synchronous traction machine in 1996, and the disc type motor adopts an axial magnetic field layout, so that the front and rear thicknesses of the synchronous traction machine are reduced; meanwhile, an encoder for feeding back the rotating speed of the tractor is arranged on the side surface of the tractor, and the rotating speed of the tractor is transmitted to the encoder arranged on the side surface through a transmission mechanism of a gear and a toothed ring.
The design effectively reduces the occupied space of the synchronous traction machine in the well, and great convenience is provided for the arrangement of the traction machine in the well. Tongli company in the same year publishes a machine room free elevator product MonoSpace with global significance by relying on the disc type motor. The disc type motor has the advantages of thickness and encoder position, so that the machine room-free elevator taking the disc type motor as a driving element has more adaptability and advantages in the utilization rate of a shaft than the machine room-free elevator made by other forms of synchronous traction machines; higher hoistway utilization means better market adaptability and more market share. The general company relies on the monopoly technology to obtain good economic benefits. Many traction machines similar in structure to the traction machine are also available on the market.
The introduction of disc motors was indeed a technical innovation that was not available at the time, but with the use of more than ten years, the problems of such motors became apparent or the requirements of new technology and new standards of elevators could not be met.
Firstly, this kind of motor adopts the axial magnetic field structure, and the magnetic pull can't offset, and the bearing needs to bear the axial force, has influenced the life of bearing, moreover in order to prevent bearing grease or the oil after the liquefaction, reveals to the braking surface or in the traction sheave rope groove, adopts sealed bearing mostly, and the bearing can not maintain, and the short-lived of sealing material causes the hauler to use the limit in service life moreover.
Secondly, because this type of hauler stator armature external diameter is bigger, still produce following problem:
a. after the steel wire rope of the traction machine is loaded, a mechanical system has a certain deformation, but due to the fact that the outer diameter of an armature is large, the unevenness of an air gap between a stator and a rotor is large. The electromagnetic noise of the tractor is increased, and the vibration of the elevator is also increased.
b. The diameter of a brake wheel matched with the synchronous traction machine is also larger, and the jumping of the brake wheel is difficult to ensure compared with the traditional machine type due to the existence of magnetic pulling force; the risk of the brake shoes rubbing against the brake wheel is high, resulting in a sharp increase in the temperature of the brake wheel and brake shoes, causing a series of failures.
c. As shown in fig. 6, the side encoder 2a is located on the outer ring of the rotor of the disc motor 1a, that is, on the outer side of the radial dimension of the tractor, and performs secondary transmission of the rotation speed through the gear ring on the outer ring of the rotor, taking into account the above effects and the machining deviation of the gear ring, so that the precision and the stability of the transmission cannot be effectively guaranteed, and the failure and the damage of the encoder and the change of the control precision are easily caused.
Finally, the distances between the stator core and the bearing of the disc motor are short; the traction machine adopts a traction sheave cantilever structure, and the stress structure of the traction machine is shown in figure 7; q is motor shaft load, Cr is bearing rated dynamic load, a bearing close to a traction sheave, namely a front bearing, selects a strip-shaped roller bearing, and bears N radial force1At a distance L from the axial load1(ii) a The bearing remote from the traction sheave, i.e. the rear bearing, is subjected to a radial force N2Distance between two bearings is L2. The weight influence of the rotor of the hoisting machine can be neglected in comparison with the shaft load, and the bearing close to the traction sheave is subjected to a radial force N1Is relatively large, N1＝(1+L1/L22)Q；
Self-aligning roller bearing having a bearing life of LB ═ Cr/N1)10/3, respectively; from this, the bearing distance L can be seen2The smaller, the front bearing radial force N1The larger the bearing life due to LB and Cr/N1Is an exponential relationship when N1At the time of increase, bearing life LThe shorter B is. Same bearing distance L2Shorter, the rear bearing life is also shortened.
Most of the encoders of the type of synchronous traction machines similar to those currently on the market are on the non-traction wheel side, i.e. the encoders are placed after. In order to break the monopoly of the technology, many attempts are made in the industry, but no encoder front-end solution different from the technology can be provided. Because the ultra-thin design of the traction machine makes the distance between the two bearings shorter, the mechanical stability of the rotor is poor, the eccentricity of the two bearings is increased after the steel wire rope of the traction machine is loaded, the running precision and the service life of the front encoder can be influenced, and the traction machine is arranged on the back of the guide rail, and the front encoder can not be normally disassembled and replaced. If the novel technology can be broken through in this aspect, the novel technology has considerable market and economic effects for the innovator.
Therefore, it is an urgent need of the technical personnel in the field to design a permanent magnet synchronous traction machine with a well utilization rate not inferior to that of an EcoDisc type motor, better operation stability, reasonable stress, low cost, high strength, long service life and field maintainability.
Disclosure of Invention
The invention aims to provide a front-mounted disc type ultrathin permanent magnet synchronous traction machine with an encoder. The invention has the characteristics of reasonable stress, low cost, high strength, long service life, field disassembly and other operation maintenance, and effectively weakens and avoids the problems generated by the EcoDisc disc type motor. The application of the invention on the elevator without a machine room can firstly realize the well utilization rate and the use effect which are consistent with those of the EcoDisc disc type motor, and the operation stability is higher than that of the EcoDisc disc type motor.
The technical scheme of the invention is as follows: a front-mounted disc type ultrathin permanent magnet synchronous traction machine of an encoder is characterized in that a permanent magnet is fixed on the inner circular surface of a rotor hub and forms a radial magnetic field with a stator fixed in a machine base; the end face of the rotor hub is raised, the length of the rotor shaft is increased, the distance between the front bearing and the rear bearing is prolonged, and the distance between the front bearing and the traction wheel is shortened; the machine base is connected with an arched supporting seat at the side of the traction wheel, an encoder is arranged on the supporting seat, and the encoder and the rotor shaft form a preposed structure.
The front-mounted disc type ultrathin permanent magnet synchronous traction machine with the encoder comprises a machine base, wherein a stator is arranged on the machine base; the rotor is provided with a magnet which covers the stator coil and forms a radial magnetic field with the stator coil; the rotor is a disc-shaped shell with one end protruding, a shaft which is rotationally matched with the base is arranged on the inner side of the protruding, a front bearing and a rear bearing are arranged on the shaft, and a traction wheel is arranged on the outer side of the protruding; and a brake and an encoder matched with the rotor are also included.
In the aforementioned disc-type ultrathin permanent magnet synchronous traction machine with a front-mounted encoder, the tooth form of the stator is T-shaped.
In the aforementioned disk-type ultrathin permanent magnet synchronous traction machine with a front encoder, the base is connected with a support base on one side of the traction sheave, and the support base is provided with the encoder; and a counter bore for accommodating the encoder is arranged on the shaft.
In the aforementioned ultra-thin permanent magnetism synchronous hauler of leading dish formula of encoder, the supporting seat is the arch, and the tie point of supporting seat and frame is central symmetry and distributes.
In the aforementioned disk-type ultrathin permanent-magnet synchronous traction machine with a front encoder, a counter bore for installing the encoder is also arranged on one side of the shaft away from the traction sheave.
In the aforementioned disc-type ultrathin permanent magnet synchronous traction machine with the front-mounted encoder, the encoder is fixed by the elastic sheet.
In the front-mounted disc type ultrathin permanent magnet synchronous traction machine with the encoder, the front bearing is an open bearing, an oil filling hole for filling oil to the front bearing is formed in the rotor, an oil cup for sealing is arranged at the oil filling hole, an operation hole opposite to the oil filling hole is formed in the supporting seat, and a plastic plug is arranged at the operation hole.
In the aforementioned ultra-thin permanent magnet synchronous traction machine with a front-mounted disc encoder, a bearing on a side of the bearing close to the traction wheel is a self-aligning roller bearing.
In the disk-type ultrathin permanent magnet synchronous traction machine with the front encoder, the part of the machine base for mounting the stator is provided with an annular recess, and heat dissipation ribs are distributed in the recess.
In the aforementioned disc-type ultrathin permanent magnet synchronous traction machine with a front encoder, the support seat is provided with a rope blocking rod which is radially adjusted.
In the aforementioned disc-type ultrathin permanent magnet synchronous traction machine with a front encoder, a terminal box is arranged on the machine base.
Compared with the prior art, the invention adopts an electromagnetic scheme structure of an ultrathin radial magnetic field, avoids unilateral magnetic pulling force generated by an axial magnetic field structure, and simultaneously designs the tooth shape of the T-shaped stator punching sheet in a brand-new way, thereby reducing stray loss and facilitating automatic coil inserting and rotor forming of the radial magnetic field. The invention reduces the radial dimension of the stator core and increases the length of the shaft thereof through the shape of the rotor without increasing the thickness of the rotor. The invention shortens the distance between the load center of the front bearing and the load center of the traction sheave, increases the distance between the load center of the front bearing and the load center of the traction sheave, improves the stress of the bearing, ensures the stability of the rotor during operation and prolongs the service life of the bearing.
On the other hand, the encoder stator is arranged in the support seat to form a preposed encoder structure, the support seat is designed to be an arched bridge structure, is matched with the spigot of the machine seat and is rigidly connected with the machine seat through a screw, and the whole rigidity is higher. The encoder can use the traditional encoder, and the installation of the encoder is changed into an installation mode of an elastic sheet by tensioning an outer ring. The design effectively improves the problem that the encoder is damaged or waveform distortion is invalid due to the fact that the tractor is stressed and changes to cause the non-concentricity of the stator and the rotor of the encoder, and reduces the risk of damage to the encoder. The encoder can also be installed at the rear position according to application requirements.
Moreover, the front bearing adopts an open bearing, the rotor is provided with the oil injection hole, and the grease can be added periodically without being disassembled in the using process of the traction machine, so that the bearing is more reliable to operate and has longer service life.
Furthermore, the annular recess and the heat dissipation rib structure can effectively improve the heat dissipation condition of the traction machine and further improve the operation stability.
In conclusion, the invention has the characteristics of reasonable stress, low cost, high strength, long service life, capability of being disassembled on site and the like, and has thin thickness and high utilization rate of the well.
Drawings
FIG. 1 is a schematic front view of the present invention;
FIG. 2 is a schematic backside view of the present invention;
FIG. 3 is a schematic cross-sectional view of the present invention;
FIG. 4 is a schematic diagram of a stator core tooth profile;
FIG. 5 is a schematic view of the structure of the oil filler hole;
FIG. 6 is a schematic view of a through-force disc motor;
fig. 7 is a schematic view of bearing stress.
Reference numerals: the method comprises the following steps of 1 a-a disc type motor, 2 a-a side encoder, 10-a base, 11-a stator, 12-a heat dissipation rib, 13-a rope blocking rod, 20-a rotor, 21-a magnet, 22-an axis, 23-an oil filling hole, 24-an oil cup, 30-a traction sheave, 40-a brake, 50-the encoder, 51-a supporting seat and 52-an operation hole.
Detailed Description
The present invention is further illustrated by the following examples, which are not to be construed as limiting the invention.
Example (b): the ultrathin permanent magnet synchronous traction machine comprises a machine base 10, wherein a stator 11 is arranged on the machine base 10; the magnetic motor also comprises a rotor 20, wherein the rotor 20 is provided with a magnet 21 which covers the coil of the stator 11 and forms a radial magnetic field with the coil, and the tooth form of the stator 11 is T-shaped; the rotor 20 is a disc-shaped shell with one end protruding, a shaft 22 which is rotationally matched with the machine base 10 is arranged on the inner side of the protruding part of the rotor 20, a front bearing and a rear bearing are arranged on the shaft 22, and a traction wheel 30 is arranged on the outer side of the protruding part of the rotor 20; also included are a brake 40, an encoder 50, and a junction box that cooperate with the rotor 20.
The rotor hub and the shaft 22 are of an integral or split structure, the permanent magnets are fixed on the inner surface of the hub to form a radial magnetic field structure with the stator 11, magnetic tension is symmetrically offset, and theoretically, axial magnetic tension is not generated. The traction sheave 30 is fixed to the hub, and is designed to shorten the distance between the center of the front bearing and the bearing center of the traction sheave and to increase the distance between the front and rear bearings to improve the stability of the rotor. The two bearings are directly arranged in the machine base 10, the concentricity of the two bearing chambers is easily ensured, and the machine base 10 improves the bearing capacity through structural optimization in such a way as reasonably arranging the support ribs 11 and the like.
The machine base 10 is connected with a supporting seat at one side of the traction sheave, and an encoder 50 is arranged on the supporting seat; the shaft 22 is provided with a counter bore for accommodating the encoder 50, that is, the main body of the encoder (also called an encoder stator) is fixed on the support base, and the rotating shaft of the encoder (also called an encoder rotor) is connected with the rotor. The supporting seat is rigidly connected with the machine base through the spigot and the screw, the concentricity of the encoder rotor and the axis of the motor is ensured, the support is of a bridge type reinforcing structure, the strength of the machine base is effectively enhanced, particularly, the deformation of the installation surface of the brake is reduced, and the braking safety performance of the traction machine is improved. Due to the above design considerations, the risk of encoder damage is reduced. The encoder is installed by an elastic sheet instead of an outer ring of the encoder in a tensioning manner. The elasticity of the stator of the encoder is adjustable, and when the steel wire rope of the traction machine is loaded, the concentricity of the rotor and the stator of the encoder is ensured, the running accuracy of the encoder is ensured, and the risk of damage to the encoder is reduced.
The supporting seat is arched, and the connecting points of the supporting seat and the machine base are distributed in central symmetry. As shown in fig. 5, the bending pieces are installed on the surface of the supporting base to prevent the lifting rope from touching the encoder during lifting. The bending pieces are symmetrically arranged in a single piece or two pieces according to the specific situation.
The shaft 22 is also provided with a counter bore for receiving the encoder 50 on the side remote from the traction sheave 30, which allows for interchanging front or rear encoder.
The front bearing is an open self-aligning roller bearing, has strong bearing capacity and can be directly filled with grease during maintenance.
The part of the machine base 10 for installing the stator 11 is provided with an annular recess, and heat dissipation ribs 12 are distributed in the recess.
The supporting seat 51 is provided with a radial adjusting rope blocking rod 13.
And the base is provided with a junction box.
The working principle is as follows:
the stator 11 is positioned in the engine base 10, the permanent magnet 21 is fixed on the inner circular surface of the hub to form a radial magnetic field structure, and the single-side magnetic pulling force generated by the axial magnetic field structure is avoided due to the adoption of the electromagnetic scheme structure of the ultrathin radial magnetic field. The main machine is a radial magnetic field fractional slot concentrated winding, and the thickness of the whole machine is reduced. Because there is not computer lab well space few, host computer and well wall distance are little, the dismantlement and the maintenance of encoder of being not convenient for, and this design encoder is located hauler side, and the leading design of encoder promptly, and the encoder can be dismantled on the scene and maintain, also can arrange at non-driving sheave according to the requirement, the encoder is rearmounted promptly.
And meanwhile, the tooth shape of the punching sheet of the stator 11 is newly designed, so that the stray loss can be reduced, and the automatic coil inserting and the rotor are convenient to form a radial magnetic field. The present invention reduces the radial dimension of the stator 11 core and increases the length of its shaft 22 by the shape of the rotor 20 without increasing the thickness of the rotor 20. Therefore, the distance between the load center of the front bearing and the load center of the traction sheave 30 is shortened, the distance between the load center of the front bearing and the load center of the rear bearing is increased, the bearing stress is improved, the stability of the rotor 20 during operation is ensured, and the service life of the bearing is prolonged.
On the other hand, the encoder 50 is in sine and cosine form, the stator 11 of the encoder 50 is mounted in the support seat 51 to form a pre-encoder 50 structure, the support seat 51 is in bridge type structural design, is matched with the spigot of the machine base 10 and is rigidly connected with the machine base 10 through a screw, and the overall rigidity is high. The encoder 50 may be a conventional encoder 50, in which the installation is changed from an outer ring tension to an elastic sheet installation. The design effectively improves the damage or waveform distortion of the encoder 50 caused by the non-concentricity of the stator and the rotor of the encoder due to the stress change of the traction machine, and reduces the risk of the damage of the encoder 50. The encoder 50 may also be post-mounted according to application requirements.
The front bearing of the invention adopts an open bearing, the rotor is provided with an oil filling hole 23 for filling oil to the front bearing, the oil filling hole is provided with an oil cup 24 for sealing, the supporting seat is provided with an operation hole 52 opposite to the oil filling hole, and the operation hole is provided with a plastic plug. The grease can be added regularly without being disassembled in the using process of the traction machine, so that the bearing can run more reliably and has longer service life. And the oil cup and the plastic plug can ensure the sealing performance of the two holes.
The annular recess and the heat dissipation rib 12 structure can effectively improve the heat dissipation condition of the traction machine and further improve the operation stability.

Claims (3)

1. The utility model provides a synchronous hauler of ultra-thin permanent magnetism of leading dish formula of encoder which characterized in that: the permanent magnet is fixed on the inner circle surface of the rotor hub and forms a radial magnetic field with the stator fixed in the engine base; the end surface of the rotor hub is bulged, the rotor hub and the shaft of the rotor are of an integrated structure, the length of the shaft of the rotor is improved, the distance between the front bearing and the rear bearing is prolonged, and the distance between the front bearing and the traction wheel is shortened; the base is connected with an arched supporting seat at the side of the traction wheel, an encoder is arranged on the supporting seat, and the encoder and a shaft of the rotor form a preposed structure; the machine base is arranged on the side surface of the guide rail in the well;
the traction machine comprises a base (10), wherein a stator (11) is arranged on the base (10); the magnetic field generator further comprises a rotor (20), wherein a magnet (21) which covers the stator coil and forms a radial magnetic field with the stator coil is arranged on the rotor (20); the rotor (20) is a disc-shaped shell with one end protruding, a shaft (22) which is rotationally matched with the base is arranged on the inner side of the protruding part of the rotor (20), a front bearing and a rear bearing are arranged on the shaft (22), and a traction wheel (30) is arranged on the outer side of the protruding part of the rotor (20); the brake (40) and the encoder (50) are matched with the rotor (20); one side of the traction sheave of the machine base is connected with a supporting seat (51), and the encoder (50) is arranged on the supporting seat (51); meanwhile, a counter bore for accommodating the encoder (50) is arranged on the shaft (22); the supporting seat (51) is arched and designed to be of a bridge-shaped structure, the supporting seat (51) is matched with a spigot of the machine base and is rigidly connected with the machine base through a screw, connecting points of the supporting seat (51) and the machine base are distributed in a central symmetry manner, bending pieces are arranged on the surface of the supporting seat (51) to prevent a lifting rope from touching the encoder (50) during hoisting, and the bending pieces are installed in a single-piece mode or in a double-piece symmetric mode; a rope blocking rod (13) which is adjusted in the radial direction is arranged on the supporting seat (51); the encoder (50) is fixed through the elastic sheet, the main body of the encoder (50) is fixed on the supporting seat (51), and the rotating shaft of the encoder (50) is connected with the rotor; the part of the machine base for installing the stator is provided with an annular recess, and heat dissipation ribs (12) are distributed in the annular recess; the front bearing is an open self-aligning roller bearing, an oil filling hole for filling oil to the front bearing is formed in the rotor (20), an oil cup (24) for sealing is arranged at the oil filling hole, and an operation hole (52) opposite to the oil filling hole is formed in the supporting seat (51).
2. The ultra-thin permanent magnet synchronous traction machine with the front-mounted disc type encoder according to claim 1, characterized in that: the shaft (22) is also provided with a counter bore for accommodating the encoder (50) on the side remote from the traction sheave (30).
3. The ultra-thin permanent magnet synchronous traction machine with the front-mounted disc type encoder according to claim 1, characterized in that: and the base is provided with a junction box.
CN201910643663.8A 2019-07-17 2019-07-17 Front-mounted disc type ultrathin permanent magnet synchronous traction machine of encoder Active CN110417133B (en)

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CN111680780B (en) * 2020-05-21 2023-05-23 长春汇通光电技术有限公司 Encoder counting device, counting method, apparatus and readable storage medium

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CN201494993U (en) * 2009-08-06 2010-06-02 郭自刚 Precoder machine-room-less elevator tractor
CN204794406U (en) * 2015-06-30 2015-11-18 浙江玛拓驱动设备有限公司 External rotor hauler
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Address after: 311603 industrial functional zone, yangcunqiao Town, Jiande City, Hangzhou City, Zhejiang Province

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