CN115276326A

CN115276326A - Motor with state self-monitoring function

Info

Publication number: CN115276326A
Application number: CN202210312303.1A
Authority: CN
Inventors: 不公告发明人
Original assignee: Hangzhou Hengrui Electric Technology Co ltd
Current assignee: Hangzhou Hengrui Electric Technology Co ltd
Priority date: 2022-04-29
Filing date: 2022-04-29
Publication date: 2022-11-01

Abstract

The invention discloses a motor with a state self-monitoring function, which comprises a shell, a sealing cover, a vibration detection mechanism and a rotor, wherein the rear end of the shell is fixedly clamped with the front end of the sealing cover, a rotating shaft penetrates through the axis of the shell and the axis of the sealing cover in a movable insertion manner, two permanent magnet stators are symmetrically and fixedly installed on the inner side of the shell, the outer side of the rotating shaft is fixedly inserted with the inner side of the rotor, the rotor consists of a plurality of clamping blocks, a plurality of silicon steel sheets are fixedly installed on the inner side of each clamping block, the outer side of the vibration detection mechanism is fixedly installed with the front end of the shell, and the axis of the inner side of the vibration detection mechanism is movably inserted with the front end of the rotating shaft. The invention changes the magnetic attraction force on the suction piece by utilizing the distance change between the permanent magnet stator and the suction piece, thereby influencing the negative pressure value in the cavity and the pressure of the elastic connecting cable on the pressure sensor, further knowing whether the air gap is changed when the motor runs on the rotating shaft, and playing a role in effectively monitoring the internal running condition of the motor.

Description

Motor with state self-monitoring function

Technical Field

The invention relates to the technical field of motors, in particular to a motor with a state self-monitoring function.

Background

With the development of industrialization, a large number of permanent magnet traction motors are equipped in various fields of industrial production, so that faults possibly generated by the permanent magnet motors can be diagnosed timely and effectively, and the method has very important significance for maintaining the whole electric drive system and avoiding more serious irreversible accidents.

In the prior art, for example, chinese patent numbers are: CN 108781025A "device for monitoring the air gap of an electric machine", comprising a rotor and a stator with a lamination stack (4) and a device for monitoring the radial air gap of an electric machine, wherein the device comprises a microwave radar system comprising a transmitting/receiving unit (1) for transmitting and receiving microwaves, an antenna (2) and a cable (3) connecting the transmitting/receiving unit (1) and the antenna (2), wherein the antenna (2) is arranged such that, in operation of the device, the opening of the antenna ends on one side of the radial air gap to be monitored.

However, in the actual use process of the prior art, when the motor has mechanical failure, the rotor eccentrically displaces along with the rotating shaft, so that the air gap inside the motor changes, when the air gap change is detected by using the microwave radar technology, the microwave radar works by means of electromagnetic field disturbance, all disturbance sources which can reach a certain magnitude in the action range can trigger the motor to work, the motor not only has the switching action of inductive load, but also can generate a magnetic field inside, so that the microwave radar is interfered, the microwave radar is frequently mistakenly reported, and the detection precision is seriously reduced.

We have therefore proposed a motor with a state self-monitoring function in order to solve the problems set forth above.

Disclosure of Invention

The present invention is directed to a motor with a status self-monitoring function, so as to solve the problems of the background art. The vibration detection mechanism has the advantages that the change of the distance between the permanent magnet stator and the suction piece is utilized to change the magnetic attraction force on the suction piece, so that the negative pressure value in the cavity and the pressure of the elastic connecting cable on the pressure sensor are influenced, the problem that whether the air gap is changed when the motor runs is further known, the function of effectively monitoring the internal running condition of the motor can be realized, the vibration detection mechanism is small in structure, the detection part is arranged in the motor to be integrally formed, too much installation space is not occupied, the interference effect of external factors on the detection precision can be reduced, the precision of the detection method is greatly improved, meanwhile, the eccentric detection of the shaft is realized by utilizing the plurality of suction pieces arranged on the outer side of the main body, the deflection direction and the deflection angle of the rotating shaft can be quickly determined by the two groups of suction pieces which are opposite, the quick positioning of a fault position by an overhaul worker can be assisted, and the maintenance difficulty and the time consumption are greatly reduced.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a motor with state is from monitoring function, includes shell, closing cap, vibration detection mechanism, rotor, the rear end of shell and the front end fixed joint of closing cap, and the axle center department of shell and closing cap runs through the activity and pegs graft and have the pivot, the inboard symmetry fixed mounting of shell has two permanent magnet stators, the outside of pivot and the inboard fixed grafting of rotor, the rotor comprises a plurality of fixture blocks, and the inboard equal fixed mounting of every fixture block has a plurality of silicon steel sheets, the outside of vibration detection mechanism and the front end fixed mounting of shell, and the inboard axle center department of vibration detection mechanism and the front end activity of pivot peg graft, vibration detection mechanism includes the detecting part, the detecting part includes main part, elasticity even cable and sealing member, the outside fixed mounting of pivot has the snap ring, and the outside of snap ring and the inboard movable mounting of main part, the outside even fixed mounting of main part has a plurality of extension pipes, and the inboard of every extension pipe has seted up the cavity, the one end fixed mounting of cavity has pressure sensor, and the one end of pressure sensor passes through the one end swing joint of elasticity even movable mounting of elasticity cable and sealing member, every the inboard of cavity has suction piece.

Preferably, the vibration detection mechanism further comprises a mounting disc, a storage battery, a wireless transmitter, a power line and a data line, one side of the detection piece is fixedly connected with one end of the storage battery through the power line, the other side of the detection piece is fixedly connected with one end of the wireless transmitter through the data line, the outer sides of the storage battery and the wireless transmitter are fixedly mounted on the outer side of the front end of the housing through the mounting disc, and a through hole is formed in the axis of the mounting disc in a penetrating mode.

Preferably, the two sides of the sealing cover are respectively fixedly inserted with a positive plate and a negative plate, one side of the front ends of the positive plate and the negative plate is fixedly provided with an electric brush, and one side of the electric brush is movably arranged with the outer side of the rear end of the rotating shaft.

Preferably, a heat dissipation fan is movably mounted on the outer side of the rear end of the rotating shaft, and a plurality of heat dissipation holes are formed in the outer side of the sealing cover in a penetrating mode.

Preferably, the rear end integrated into one piece of shell has the hasp, and the fixed joint in the outside of the one end of hasp and closing cap, the outside of shell is run through and has been seted up a plurality of radiating grooves.

Preferably, the front end axle center department movable mounting of shell has bearing a, and the axle center department of bearing a pegs graft with the front end activity of pivot, the axle center department movable mounting of closing cap has bearing b, and the axle center department of bearing b pegs graft with the rear end activity of pivot.

Preferably, the U-shaped thermistor is fixedly clamped between the two permanent magnet stators, an air gap is formed between each permanent magnet stator and the corresponding rotor, and two ends of the air gap are respectively communicated with the heat dissipation holes and the inner sides of the heat dissipation grooves.

Preferably, the suction piece comprises a movable block, a sealing ring is fixedly sleeved on the outer side of the movable block, the outer side of the sealing ring is connected with the inner side of the cavity in a sliding mode, a ferromagnetic metal block is fixedly mounted at one end of the movable block, and a limiting block is fixedly mounted on the inner side of the cavity.

Preferably, the top of the pressure sensor is fixedly connected with a mainboard through a wire, a single chip microcomputer is fixedly mounted on one side of the top of the mainboard, and the top of the single chip microcomputer is fixedly connected with one end of a power line and one end of a data line.

Compared with the prior art, the invention has the beneficial effects that:

1. through the arrangement of the vibration detection mechanism, the change of the distance between the permanent magnet stator and the suction piece is utilized to change the magnetic attraction force on the suction piece, so that the negative pressure value in the cavity and the pressure of the elastic connecting rope on the pressure sensor are influenced, the problem that whether the air gap is changed when the motor runs is further known, and the function of effectively monitoring the internal running condition of the motor can be realized;

2. through the arrangement of the vibration detection mechanism, the vibration detection mechanism is small in structure, the detection part is arranged in the motor and integrally formed, excessive installation space cannot be occupied, the interference effect of external factors on detection precision can be reduced, and the precision of the detection method is greatly improved;

3. through the setting of vibration detection mechanism, realized utilizing a plurality of suction pieces installed in the main part outside to the eccentric detection of pivot, the accessible is located two sets of suction pieces of subtend and determines the pivot fast and takes place direction and angle of deflecting when rotating to can assist the maintainer to fix a position the fault location fast, greatly reduced the maintenance degree of difficulty and consuming time.

Drawings

FIG. 1 is a perspective view of an outer side structure of a motor with a self-monitoring status function according to the present invention;

FIG. 2 is a schematic cross-sectional view of a motor with self-monitoring status according to the present invention;

FIG. 3 is a perspective view of the internal structure of a motor with self-monitoring status according to the present invention;

FIG. 4 is a perspective view of a portion of the internal structure of a motor with self-monitoring status according to the present invention;

FIG. 5 is a schematic structural diagram of a motor vibration detection mechanism with a self-monitoring status function according to the present invention;

FIG. 6 is a schematic structural diagram of a front end of a motor with a self-monitoring status function according to the present invention;

FIG. 7 is a schematic structural diagram of a motor detecting element with a self-monitoring status function according to the present invention;

FIG. 8 is an enlarged view taken at A in FIG. 7;

fig. 9 is a schematic top view of a motor detecting element with a self-monitoring status function according to the present invention.

In the figure:

1. a housing; 2. sealing the cover; 6. a vibration detection mechanism; 9. a rotor; 90. a clamping block; 91. a silicon steel sheet; 5. a rotating shaft; 50. a snap ring; 8. a permanent magnet stator; 60. a detection member; 601. a main body; 604. an elastic connecting rope; 606. a seal member; 602. an extension pipe; 603. a cavity; 605. a pressure sensor; 607. a suction member; 61. installing a disc; 62. a battery; 63. a wireless transmitter; 64. a power line; 66. a data line; 65. a through hole; 3. a positive plate; 4. a negative plate; 30. an electric brush; 7. a heat dissipation fan; 40. heat dissipation holes; 10. locking; 11. a heat sink; 12. a bearing a; 14. a bearing b; 80. a U-shaped thermistor; 81. an air gap; 6070. a movable block; 6071. a seal ring; 6072. a ferromagnetic metal block; 6021. a limiting block; 6050. a wire; 6051. a main board; 6052. and a single chip microcomputer.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-9, the present invention provides a technical solution: a motor with a state self-monitoring function comprises a shell 1, a sealing cover 2, a vibration detection mechanism 6 and a rotor 9, wherein the rear end of the shell 1 is fixedly clamped with the front end of the sealing cover 2, a rotating shaft 5 penetrates through and is movably inserted in the shaft centers of the shell 1 and the sealing cover 2, two permanent magnet stators 8 are symmetrically and fixedly installed on the inner side of the shell 1, the outer side of the rotating shaft 5 is fixedly inserted in the inner side of the rotor 9, the rotor 9 is composed of a plurality of clamping blocks 90, a plurality of silicon steel sheets 91 are fixedly installed on the inner side of each clamping block 90, the outer side of the vibration detection mechanism 6 is fixedly installed on the front end of the shell 1, the shaft center of the inner side of the vibration detection mechanism 6 is movably inserted in the front end of the rotating shaft 5, the vibration detection mechanism 6 comprises a detection piece 60, the detection piece 60 comprises a main body 601, an elastic connecting rope 604 and a sealing piece 606, a clamping ring 50 is fixedly installed on the outer side of the rotating shaft 5, the outer side of the clamping ring 50 is movably installed on the inner side of the main body 601, a plurality of extension pipes 602 are uniformly and provided with a cavity 603, one end of a pressure sensor 605 is movably connected with the sealing piece of the sealing piece 607, and one end of the elastic connecting rope 604 of the sealing piece which is movably connected with a suction piece 607; when the motor is not started, the suction piece 607 in the detection piece 60 slides and displaces towards the outside of the cavity 603 due to the magnetic attraction force of the permanent magnet stator 8 at the outer side, so that the volume of the cavity 603 between the sealing piece 606 and the suction piece 607 is increased, the internal pressure intensity is reduced, the pressure received by the elastic connecting cable 604 is reduced, the pressure received by the pressure sensor 605 at one end of the elastic connecting cable is preliminarily reduced to achieve a stable state, when the rotating shaft 5 rotates at a high speed in the housing 1, if the rotating shaft 5 of the motor is not eccentrically dislocated, the detection piece 60 still maintains the stable state, the pressure change received by the plurality of pressure sensors 605 at the outer side of the elastic connecting cable does not exceed a threshold value, if the rotating shaft 5 of the motor deflects and dislocates, an air gap is affected, so that the sleeved detection piece 60 is eccentric along with the rotating shaft 5, the suction piece 607 in the cavity 603 at one side is close to the permanent magnet stator 8, the suction piece 607 in the cavity 603 at the other side is far from the permanent magnet stator 8, so that the suction piece 607 close to the permanent magnet stator 8 is subjected to the magnetic attraction force of the suction piece 607 is increased, and the magnetic attraction force of the magnetic attraction piece 603 in the cavity 603 is reduced, and the displacement of the motor 603 is diagnosed when the rotating shaft 5, and the magnetic attraction force of the motor is rapidly reduced, thereby.

As shown in fig. 5, the vibration detection mechanism 6 further includes a mounting disc 61, a storage battery 62, a wireless transmitter 63, a power line 64 and a data line 66, one side of the detection piece 60 is fixedly connected with one end of the storage battery 62 through the power line 64, the other side of the detection piece 60 is fixedly connected with one end of the wireless transmitter 63 through the data line 66, the outer sides of the storage battery 62 and the wireless transmitter 63 are fixedly mounted on the outer side of the front end of the housing 1 through the mounting disc 61, a through hole 65 is formed in the axis of the mounting disc 61 in a penetrating manner, data collected by the detection piece 60 are transmitted to the wireless transmitter 63 through the data line 66 and then uploaded to a supervisory terminal through a wireless signal, and the storage battery 62 is used for supplying power to the wireless transmitter 63 and the detection piece 60.

As shown in fig. 1, 2 and 3, the positive plate 3 and the negative plate 4 are respectively fixedly inserted into two sides of the sealing cover 2, the electric brush 30 is fixedly mounted on one side of the front ends of the positive plate 3 and the negative plate 4, one side of the electric brush 30 is movably mounted on the outer side of the rear end of the rotating shaft 5, and the electric wires are externally connected with the positive plate 3 and the negative plate 4, so that a current path is formed for electrifying and supplying energy to the rotating shaft 5, and the quick rotation is realized by electromagnetic induction.

As shown in fig. 2 and 3, the heat dissipation fan 7 is movably mounted on the outer side of the rear end of the rotating shaft 5, a plurality of heat dissipation holes 40 are uniformly formed in the outer side of the sealing cover 2 in a penetrating manner, and the heat dissipation fan 7 rotates rapidly along with the rotating shaft 5, so that the heat dissipation efficiency inside the housing 1 is improved.

As shown in fig. 1, a latch 10 is integrally formed at the rear end of the housing 1, the latch 10 is a barb formed by a metal plate at one end of the housing 1, one end of the latch 10 is fixedly clamped with the outer side of the cover 2, a plurality of heat dissipation grooves 11 are formed through the outer side of the housing 1, and the plurality of heat dissipation grooves 11 are used for allowing outside air to flow in.

As shown in fig. 1 and 4, a bearing a12 is movably mounted at the front end axis of the housing 1, the axis of the bearing a12 is movably inserted into the front end of the rotating shaft 5, a bearing b14 is movably mounted at the axis of the sealing cover 2, and the axis of the bearing b14 is movably inserted into the rear end of the rotating shaft 5, so that the bearing a12 and the bearing b14 can reduce the friction force of the rotating shaft 5 during rotation, and prevent the rotating shaft 5 from shaking due to excessive abrasion.

As shown in fig. 3 and 6, a U-shaped thermistor 80 is fixedly clamped between the two permanent magnet stators 8, an air gap 81 is arranged between the permanent magnet stators 8 and the rotor 9, two ends of the air gap 81 are respectively communicated with the inner sides of the heat dissipation holes 40 and the heat dissipation grooves 11, the U-shaped thermistor 80 is used for detecting temperature change in the motor, and the heat dissipation holes 40 and the heat dissipation grooves 11 are used for an air flow passage, so that heat dissipation is rapidly performed inside the motor.

As shown in fig. 8, the suction piece 607 includes a movable block 6070, a sealing ring 6071 is fixedly sleeved on the outside of the movable block 6070, the outside of the sealing ring 6071 is slidably connected with the inside of the cavity 603, a ferromagnetic metal block 6072 is fixedly mounted at one end of the movable block 6070, a limiting block 6021 is fixedly mounted on the inside of the cavity 603, the ferromagnetic metal block 6072 and the permanent magnet stator 8 outside the cavity 603 are slidably displaced along the cavity 603 due to the magnetic attraction, and the limiting block 6021 prevents the suction piece 607 from falling out of the cavity 603.

As shown in fig. 9, the top of the pressure sensor 605 is fixedly connected to a main board 6051 through a wire 6050, a single chip microcomputer 6052 is fixedly mounted on one side of the top of the main board 6051, the top of the single chip microcomputer 6052 is fixedly connected to one end of a power line 64 and one end of a data line 66, and pressure change data detected by each pressure sensor 605 is guided into the single chip microcomputer 6052 of the main board 6051 through the wire 6050, statistically uploaded to the wireless transmitter 63, and reported.

The use method and the working principle of the device are as follows: when the motor is not started, the suction piece 607 in the detection piece 60 slides and displaces towards the outside of the cavity 603 due to the magnetic attraction of the outer permanent magnet stator 8, so that the volume of the cavity 603 between the sealing piece 606 and the suction piece 607 is increased, the internal pressure is reduced, the pressure applied to the elastic connecting cable 604 is reduced, and the pressure applied to the pressure sensor 605 at one end of the elastic connecting cable is initially reduced, thereby achieving a stable state.

When the rotating shaft 5 rotates at a high speed in the housing 1, if the rotating shaft 5 of the motor is not eccentrically displaced, the detecting member 60 remains in a stable state, and the pressure change received by the plurality of pressure sensors 605 on the outer side thereof does not exceed the threshold value.

If the rotating shaft 5 of the motor deflects and dislocates, the sleeved detection piece 60 is eccentric along with the rotating shaft 5, the suction piece 607 in the cavity 603 on one side is close to the permanent magnet stator 8, the suction piece 607 in the cavity 603 on the other side is far away from the permanent magnet stator 8, the magnetic attraction force borne by the suction piece 607 close to the permanent magnet stator 8 is increased, the pressure borne by the pressure sensor 605 in the same cavity 603 is reduced again, the magnetic attraction force borne by the suction piece 607 far away from the permanent magnet stator 8 is reduced, the pressure borne by the pressure sensor 605 in the same cavity 603 is increased, and therefore the eccentric displacement and the mechanical fault in the running of the rotating shaft 5 are rapidly diagnosed. The pressure change data detected by each pressure sensor 605 is led into the single chip 6052 of the main board 6051 through a lead 6050, and is statistically uploaded to the wireless transmitter 63 for reporting, so that a supervisor can quickly acquire the operation condition of the motor through the terminal.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof.

Claims

1. The motor with the state self-monitoring function is characterized by comprising a shell (1), a sealing cover (2), a vibration detection mechanism (6) and a rotor (9), wherein the rear end of the shell (1) is fixedly clamped with the front end of the sealing cover (2), a rotating shaft (5) penetrates through the axis of the shell (1) and the shaft center of the sealing cover (2) in a movable insertion manner, two permanent magnet stators (8) are symmetrically and fixedly installed on the inner side of the shell (1), the outer side of the rotating shaft (5) is fixedly inserted with the inner side of the rotor (9), the rotor (9) is composed of a plurality of clamping blocks (90), a plurality of steel sheets (91) are fixedly installed on the inner side of each clamping block (90), the outer side of the vibration detection mechanism (6) is fixedly installed with the front end of the shell (1), the inner side axis of the vibration detection mechanism (6) is movably inserted with the front end of the rotating shaft (5), the vibration detection mechanism (6) comprises a detection piece (60), the detection piece (60) comprises a main body (601), an elastic connecting cable (604) and a sealing piece (606), a plurality of silicon tubes (601) are uniformly installed on the outer side of which extends from the cavity (601), and a plurality of silicon tubes (602) are uniformly installed on the outer side of which extends, one end of the cavity (603) is fixedly provided with a pressure sensor (605), one end of the pressure sensor (605) is movably connected with one end of the sealing element (606) through an elastic connecting cable (604), and the inner side of each cavity (603) is movably provided with a suction element (607).

2. The motor with a state self-monitoring function according to claim 1, characterized in that: vibration detection mechanism (6) still include mounting disc (61), battery (62), wireless transmission ware (63), power cord (64) and data line (66), the one end fixed connection of power cord (64) and battery (62) is passed through to one side of detection piece (60), and the one end fixed connection of data line (66) and wireless transmission ware (63) is passed through to the opposite side of detection piece (60), the front end outside fixed mounting of mounting disc (61) and shell (1) is all passed through in the outside of battery (62) and wireless transmission ware (63), through-hole (65) have been seted up in the axle center department of mounting disc (61).

3. The motor with a state self-monitoring function according to claim 1, characterized in that: the two sides of the sealing cover (2) are respectively fixedly inserted with a positive plate (3) and a negative plate (4), one side of the front ends of the positive plate (3) and the negative plate (4) is fixedly provided with an electric brush (30), and one side of the electric brush (30) is movably arranged with the outer side of the rear end of the rotating shaft (5).

4. The motor with a state self-monitoring function according to claim 1, characterized in that: the rear end outside movable mounting of pivot (5) has heat dissipation fan (7), a plurality of louvres (40) have evenly been run through in the outside of closing cap (2).

5. The motor with a state self-monitoring function according to claim 1, characterized in that: the rear end integrated into one piece of shell (1) has hasp (10), and the fixed joint in the outside of the one end of hasp (10) and closing cap (2), a plurality of radiating grooves (11) have been run through in the outside of shell (1).

6. The motor with a state self-monitoring function according to claim 1, characterized in that: the front end axle center department movable mounting of shell (1) has bearing a (12), and the axle center department of bearing a (12) pegs graft with the front end activity of pivot (5), the axle center department movable mounting of closing cap (2) has bearing b (14), and the axle center department of bearing b (14) pegs graft with the rear end activity of pivot (5).

7. The motor with a state self-monitoring function according to claim 5, characterized in that: two fixed the joint in the card has U type thermistor (80) between permanent magnet stator (8), and is equipped with air gap (81) between permanent magnet stator (8) and rotor (9), the both ends of air gap (81) are linked together with the inboard of louvre (40) and radiating groove (11) respectively.

8. The motor with a state self-monitoring function according to claim 1, characterized in that: the suction piece (607) comprises a movable block (6070), a sealing ring (6071) is fixedly sleeved on the outer side of the movable block (6070), the outer side of the sealing ring (6071) is connected with the inner side of the cavity (603) in a sliding mode, a ferromagnetic metal block (6072) is fixedly mounted at one end of the movable block (6070), and a limiting block (6021) is fixedly mounted on the inner side of the cavity (603).

9. The motor with a state self-monitoring function according to claim 2, characterized in that: the top of pressure sensor (605) passes through wire (6050) fixedly connected with mainboard (6051), and top one side fixed mounting of mainboard (6051) has singlechip (6052), the top of singlechip (6052) and the one end fixed connection of power cord (64) and data line (66).