CN113178978A - Protection device for be used for biconvex utmost point PMSM - Google Patents
Protection device for be used for biconvex utmost point PMSM Download PDFInfo
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- CN113178978A CN113178978A CN202110519699.2A CN202110519699A CN113178978A CN 113178978 A CN113178978 A CN 113178978A CN 202110519699 A CN202110519699 A CN 202110519699A CN 113178978 A CN113178978 A CN 113178978A
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- side wall
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- rotor
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- 239000000428 dust Substances 0.000 claims abstract description 50
- 230000001360 synchronised effect Effects 0.000 claims abstract description 30
- 230000007246 mechanism Effects 0.000 claims abstract description 25
- 230000017525 heat dissipation Effects 0.000 claims abstract description 17
- 230000009471 action Effects 0.000 claims description 8
- 230000001012 protector Effects 0.000 claims description 7
- 238000010521 absorption reaction Methods 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 9
- 230000008569 process Effects 0.000 description 7
- 230000003068 static effect Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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- 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
- H02K5/10—Casings or enclosures characterised by the shape, form or construction thereof with arrangements for protection from ingress, e.g. water or fingers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/28—Plant or installations without electricity supply, e.g. using electrets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/34—Constructional details or accessories or operation thereof
- B03C3/40—Electrode constructions
- B03C3/45—Collecting-electrodes
- B03C3/47—Collecting-electrodes flat, e.g. plates, discs, gratings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/34—Constructional details or accessories or operation thereof
- B03C3/40—Electrode constructions
- B03C3/60—Use of special materials other than liquids
- B03C3/64—Use of special materials other than liquids synthetic resins
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/34—Constructional details or accessories or operation thereof
- B03C3/74—Cleaning the electrodes
- B03C3/743—Cleaning the electrodes by using friction, e.g. by brushes or sliding elements
-
- 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
- H02K11/25—Devices for sensing temperature, 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
- H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
- H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
- H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/26—Structural association of machines with devices for cleaning or drying cooling medium, e.g. with filters
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Motor Or Generator Frames (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
The invention relates to a protection device for a doubly salient permanent magnet synchronous motor, which comprises: a motor housing; the motor end cover is fixedly connected to the side wall of the end part of the motor shell, an inner cavity is formed between the motor end cover and the motor shell and between the motor end cover and the motor shell as well as between the motor end cover and the motor shell, a dust collection mechanism is arranged in the inner cavity, and meanwhile, a heat dissipation mechanism is arranged on the motor end cover; the mounting seat is provided with a hollow inner cavity, is provided with an opening and is fixedly connected to the inner side wall of the motor end cover; the rotor is arranged in the motor shell, one end of the rotor penetrates through the opening of the mounting seat and is rotatably connected to the motor end cover, and the other end of the rotor penetrates through the center of the doubly salient permanent magnet synchronous motor; the sensor assembly is fixedly installed on the outer side wall of the motor shell, and a temperature sensor and a vibration sensor are fixedly arranged in the sensor assembly to control the motor to operate according to the monitored motor temperature and the monitored rotor vibration data, so that the motor can be effectively prevented from operating too hot. The invention has the advantages of strong dust removal protection function and good heat dissipation effect.
Description
Technical Field
The invention relates to the field of motor protection, in particular to a protection device for a doubly salient permanent magnet synchronous motor.
Background
In recent years, a doubly salient motor in which stator poles and rotor poles are both salient pole structures has been widely studied, and doubly salient motors can be classified into doubly salient permanent magnet synchronous motors and switched reluctance motors according to the presence or absence of permanent magnets. The output torque of the motor is increased, the power of the motor is also increased, the motor is overheated, and the motor overheating condition is more obvious when the motor is used in the environment with poor ventilation.
The doubly salient permanent magnet synchronous motor can monitor the internal running temperature of the motor by configuring a temperature sensing device, but the doubly salient permanent magnet synchronous motor only has a monitoring function, when the motor is overheated, the accumulated heat in the motor can not be effectively dissipated, the motor runs under an overheated state for a long time, the motor is extremely easy to break down and damage, the existing synchronous motor is in the running process, a large amount of dust easily enters the motor, the service life of the motor can be seriously influenced in the long-term past, and a protection device for the doubly salient permanent magnet synchronous motor is provided for solving the problems.
Disclosure of Invention
The invention aims to provide a protection device for a doubly salient permanent magnet synchronous motor, which has the advantages of good heat dissipation effect and strong dust removal protection function, and effectively prolongs the service life of the motor.
To achieve the above object, the present invention provides a protection device for a doubly salient permanent magnet synchronous motor, comprising: the motor shell is internally provided with a doubly salient permanent magnet synchronous motor; the motor end cover is fixedly connected to the side wall of the end part of the motor shell, an inner cavity is formed between the motor end cover and the motor shell and between the motor end cover and the motor shell as well as between the motor end cover and the motor shell, a dust collection mechanism is arranged in the inner cavity, and meanwhile, a heat dissipation mechanism is arranged on the motor end cover; the mounting seat is provided with a hollow inner cavity and an opening, and is fixedly connected to the inner side wall of the motor end cover; the rotor is arranged in the motor shell, one end of the rotor penetrates through the opening of the mounting seat and is rotatably connected to the motor end cover, and the other end of the rotor penetrates through the center of the doubly salient permanent magnet synchronous motor; the sensor assembly is fixedly installed on the outer side wall of the motor shell, and a temperature sensor and a vibration sensor are fixedly arranged in the sensor assembly to control the motor to operate according to the monitored motor temperature and the monitored rotor vibration data, so that the motor can be effectively prevented from operating too hot.
Wherein, a protector for biconvex utmost point PMSM still include: the supporting bearing is fixedly arranged in the inner cavity of the mounting seat and used for supporting the rotor; the fan blades are fixedly sleeved on the side wall of the rotor and used for increasing air flow; the ash collecting box is fixedly arranged on the outer side wall of the bottom end of the motor end cover and corresponds to an ash falling opening formed in a penetrating mode on the side wall of the bottom end of the motor end cover.
Wherein, dust absorption mechanism includes: the two dust absorption mechanism components are symmetrically arranged on the side walls of the two sides of the mounting seat; the mounting ring is fixedly sleeved on the rotor and is positioned between the mounting seat and the fan blades; the mounting ring is used for connecting two dust collection mechanism components.
Further, the dust suction mechanism assembly comprises: the rubber plate is arranged on the side wall of one side of the mounting seat; the fixing rod is fixedly connected to the side wall of the mounting ring; the rotating plate is fixedly connected to the end part of the fixed rod; one side of the fur layer is fixedly arranged on the side wall of the rotating plate, and the other side of the fur layer is in frictional contact with the side wall of the rubber plate; the sliding chute is arranged on the side wall of the end part of the rotating plate; the second sliding block is arranged in the sliding groove; one end of the limiting block is connected with one end of the second sliding block, and the other end of the limiting block is connected with the inner side wall of the sliding groove through a spring; the brush rod is fixedly connected to one end, which is not connected with the limiting block, of the second sliding block, and a brush is fixedly arranged on the side wall, opposite to the rubber plate, of the brush rod; the overflow ring is fixedly arranged on the inner side wall of the motor end cover, and can block the cleaned dust, so that the dust is prevented from being brought into the motor by airflow.
Furthermore, a bump is arranged on the inner wall of one end, close to the brush rod, of the sliding groove, the limiting block is located between the bump and the spring, the bump and the limiting block limit the moving range of the second sliding block together, and the second sliding block is prevented from completely sliding out of the sliding groove.
The brush is in friction contact with the side wall of the rubber plate, so that the rubber plate is provided with an electrostatic core due to friction.
The heat dissipation mechanisms are respectively and symmetrically arranged on the upper side wall and the lower side wall of the motor end cover; each heat dissipation mechanism includes: the sliding cavity is arranged on the upper side wall or the lower side wall of the motor end cover and is provided with a sliding opening; the first sliding block is arranged in the sliding cavity and is in sealed sliding connection with the sliding cavity; the air inlet penetrates through the side wall of the end part of the motor end cover, and the inner side wall of the air inlet is connected with a dustproof cover plate in a sliding manner; the air holes penetrate through the dustproof cover plate and are used for radiating heat and isolating dust in the air; the connecting rod, one end fixed connection are at the inside wall of dustproof apron, and other end fixed connection is on the inside wall of first slider, make dustproof apron pass through the connecting rod interlock with first slider and be connected.
And an inner cavity formed by the first sliding block and the sliding cavity is provided with gas which is easy to be subjected to thermal expansion.
When the rotor rotates at a high speed, the sliding block applies thrust to the brush rod and drives the brush to be separated from the rubber plate under the action of centrifugal force, so that dust adsorbed on the rubber plate can be prevented from being swept down by the brush; when the rotational speed of rotor reduces, centrifugal force diminishes and then makes the spring shrink, and the slider receives the pulling force that the spring was applyed, makes brush and rubber slab frictional contact to the dust that will adsorb at the rubber slab cleans down, and is blockked by the overflow ring.
When the temperature inside the motor is higher, the gas in the sliding cavity expands when heated, thrust is applied to the first sliding block, the first sliding block applies thrust to the connecting rod, the connecting rod drives the dustproof cover plate to slide, the gas port is completely opened, the air inflow is increased, the air flow exchange efficiency is improved, and the heat dissipation purpose is achieved.
In summary, compared with the prior art, the protection device for the doubly salient permanent magnet synchronous motor provided by the invention has the following beneficial effects:
1. through the rotor, the collar, the dead lever, the commentaries on classics board, the fur layer, the rubber slab, cooperation between the brush-holder stud is used, in motor operation process, the rotation of rotor drives the fur layer on the commentaries on classics board lateral wall constantly and rubs with the rubber slab, make the rubber slab surface carry the static charge, and then make the dust that enters into motor inside along with the air together can be adsorbed by the rubber slab, realize the function to the automatic dust removal of the air that enters into motor inside, and when the motor stall gradually, the brush that sets up on the brush-holder stud on the commentaries on classics board lateral wall can laminate with the surface of rubber slab, along with the slow rotation of commentaries on classics board, can clear up the dust that adsorbs on the rubber slab surface automatically, and concentrate the collection by the ash collecting box, in order to prevent motor operation process, the dust takes place in the condition of the inside accumulation of motor.
2. The motor comprises a rotor, fan blades, a sliding cavity, a first sliding block, a connecting rod, an air inlet and a dustproof cover plate, wherein the motor is matched with the dustproof cover plate for use, when the motor runs, the fan blades fixedly mounted on the side wall of the rotor rotate synchronously with the rotor, external low-temperature air is continuously sucked into the motor, airflow flow is increased, effective heat dissipation is achieved inside the motor, when the temperature inside the motor is too high, the gas in the sealing space of the sliding cavity in the side wall of a motor end cover is heated and expands, the first sliding block can be driven to slide, the connecting rod can push the dustproof cover plate inside the air inlet, the port of the air inlet is automatically and thoroughly opened, the ventilation area of the air inlet is increased, the heat dissipation effect is improved, the temperature change condition inside the motor is monitored in real time through a temperature sensor, and the motor is prevented from running for a long time under an overheat state to cause faults.
Drawings
Fig. 1 is a schematic top view of a protection device for a doubly salient permanent magnet synchronous machine of the present invention;
FIG. 2 is an enlarged view of A of FIG. 1 according to the present invention;
FIG. 3 is an enlarged view of B of FIG. 1 according to the present invention;
fig. 4 is a side view showing a structure of a rubber sheet portion of a protector for a doubly salient permanent magnet synchronous machine of the present invention;
FIG. 5 is a side view of a rotating plate portion of a shielding device for a doubly salient PMSM according to the present invention;
fig. 6 is a side view of a motor end cover structure of a guard device for a doubly salient permanent magnet synchronous motor of the present invention.
Detailed Description
The technical solution, the structural features, the achieved objects and the effects of the embodiments of the present invention will be described in detail with reference to fig. 1 to 6 of the embodiments of the present invention.
It should be noted that the drawings are simplified in form and not to precise scale, and are only used for convenience and clarity to assist in describing the embodiments of the present invention, but not for limiting the conditions of the embodiments of the present invention, and therefore, the present invention is not limited by the technical spirit, and any structural modifications, changes in the proportional relationship, or adjustments in size, should fall within the scope of the technical content of the present invention without affecting the function and the achievable purpose of the present invention.
It is to be noted that, in the present invention, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
The present invention provides a protection device for a doubly salient permanent magnet synchronous motor, as shown in fig. 1, 4 and 6, comprising: a motor housing 1 in which a doubly salient permanent magnet synchronous motor is provided; the motor end cover 2 is fixedly connected to the side wall of the end part of the motor shell 1, an inner cavity is formed between the motor end cover 2 and the motor shell 1 and between the motor end cover 2 and the motor, a dust collection mechanism is arranged in the inner cavity, and meanwhile, a heat dissipation mechanism is arranged on the motor end cover 2; the mounting seat 5 is provided with a hollow inner cavity and an opening, and the mounting seat 5 is fixedly connected to the inner side wall of the motor end cover 2; the rotor 4 is arranged inside the motor shell 1, one end of the rotor passes through the opening of the mounting seat 5 and is rotatably connected to the motor end cover 2, and the other end of the rotor passes through the center of the doubly salient permanent magnet synchronous motor; the supporting bearing 6 is fixedly arranged in the inner cavity of the mounting seat 5 and sleeved on the rotor 4; the fan blades 7 are fixedly sleeved on the rotor 4 and used for increasing air flow and improving heat dissipation efficiency; the sensor assembly 3 is fixedly arranged on the outer side wall of the motor shell 1, a temperature sensor and a vibration sensor are fixedly arranged in the sensor assembly, the sensor assembly 3 controls the operation of the motor through an external controller according to the monitored motor temperature and rotor vibration data, and the motor can be effectively prevented from operating too hot; the dust collecting box 26 is fixedly installed on the outer side wall of the bottom end of the motor end cover 2 and corresponds to the position of a dust falling opening formed in the bottom end of the motor end cover 2 in a penetrating mode.
As shown in fig. 1, 3 and 5, the dust suction mechanism includes: the two dust absorption mechanism components are symmetrically arranged on the side walls of the two sides of the mounting seat 5; the mounting ring 16 is fixedly sleeved on the rotor 4 and is positioned between the mounting seat 5 and the fan blades 7; the mounting ring 16 is used to connect two vacuum mechanism components.
Wherein, each dust absorption mechanism subassembly contains: a rubber plate 15 provided on one side wall of the mount 5; a fixing rod 17 fixedly connected to the side wall of the mounting ring 16; a rotating plate 18 fixedly connected to an end of the fixing rod 17; a fur layer 19 having one side fixedly provided on the side wall of the rotating plate 18 and the other side in frictional contact with the side wall of the rubber plate 15; the sliding chute 20 is arranged on the side wall of the end part of the rotating plate 18, a second sliding block 21 is arranged in the sliding chute 20, and a lug 28 for preventing the second sliding block 21 from slipping is arranged at one end of the sliding chute 20 far away from the inner side wall; the limiting block 27 is fixedly connected to one end, close to the rotating plate 18, of the second sliding block 21; one end of the spring 22 is fixedly connected to the side wall of the limit block 27, and the other end is fixedly connected to the inner side wall of the chute 20; the limit block 27 is located between the projection 28 and the spring 22, and the projection 28 and the limit block 27 jointly limit the moving range of the second slide block 21, so that the second slide block 21 is prevented from completely sliding out of the sliding groove 20; the brush rod 23 is fixedly connected to one end of the second slide block 21, which is not connected with the limiting block 27, a brush 24 is fixedly arranged on the side wall of the brush rod opposite to the rubber plate 15, and the brush 24 is in friction contact with the rubber plate 15; the overflow ring 25 is fixedly arranged on the inner side wall of the motor end cover 2, and can block the cleaned dust, so that the dust is prevented from being brought into the motor by airflow. When the rotor 4 rotates at a high speed, under the action of centrifugal force, the sliding block 21 slides outwards, thrust is applied to the brush rod 23 and the brush 24 is driven to be separated from the rubber plate 15, so that the situation that the brush 24 cleans dust adsorbed on the rubber plate 15 and the dust is brought into the motor by air flow is prevented; when the rotating speed of the rotor 4 is reduced, the centrifugal force is reduced, the spring 22 is contracted, the sliding block 21 slides inwards under the pulling force exerted by the spring 22, the brush 23 is in friction contact with the rubber plate 15, and therefore dust adsorbed on the rubber plate 15 is cleaned, and meanwhile due to the blocking of the overflow ring 25, the dust is effectively prevented from entering the motor.
As shown in fig. 1 and fig. 2, the heat dissipation mechanisms are respectively and symmetrically arranged on the upper and lower side walls of the motor end cover 2; each heat dissipation mechanism includes: the sliding cavity 8 is formed in the upper side wall or the lower side wall of the motor end cover 2, and a sliding opening 9 is formed in the sliding cavity 8; the first sliding block 10 is arranged in the sliding cavity 8 and is in sealed sliding connection with the inner wall of the sliding cavity 8, and an inner cavity formed by the first sliding block 10 and the sliding cavity 8 is provided with gas which is easy to be subjected to thermal expansion; the air inlet 11 penetrates through the side wall of the end part of the motor end cover 2, and the inner side wall of the air inlet is connected with a dustproof cover plate 12 in a sliding mode; a plurality of air holes 13, which are arranged through the dustproof cover plate 12 and used for radiating heat and isolating dust in the air; and one end of the connecting rod 14 is fixedly connected to the inner side wall of the dustproof cover plate 12, and the other end of the connecting rod is fixedly connected to the inner side wall of the first slider 10, so that the dustproof cover plate 12 is in linkage connection with the first slider 10 through the connecting rod 14. When the temperature in the motor is high, the gas in the sliding cavity 8 expands due to heating, thrust is applied to the first sliding block 10, the first sliding block 10 slides outwards, the first sliding block 10 applies the thrust to the connecting rod 14, the connecting rod 14 drives the dustproof cover plate 12 to slide, the air port 11 is opened completely, the air inflow is increased, the air flow exchange efficiency is improved, and the heat dissipation purpose is achieved.
In the protection device for the doubly salient permanent magnet synchronous motor in the embodiment, when the motor runs, the temperature sensor and the vibration sensor in the sensor assembly 3 can monitor the temperature in the motor and the vibration abnormality of the rotor 4, and the running of the motor is controlled through the external controller according to the monitored data. In the running process of the motor, the rotation of the rotor 4 can drive the fan blades 7 fixedly connected to the side walls to rotate, so that outside low-temperature air is sucked into the motor through the air holes 13 in the side walls of the dustproof cover plates 12, the air flow is increased, and the interior of the motor is effectively cooled.
In addition, the mounting ring 16 fixedly connected to the rotor 4 rotates synchronously with the rotor 4 to drive the two rotating plates 18 to rotate at a high speed, the fur layer 19 on the side wall of the two rotating plates 18 continuously rubs and contacts the two rubber plates 15, the rubber plates 15 can carry static charges due to friction electrification, after air enters the inner cavity formed by the motor end cover 2 and the motor shell 1 through the air inlet 11, the air firstly contacts one side of the rubber plates 15 close to the air inlet 11, and the rubber plates 15 can absorb most of dust in the air entering the inner cavity due to the static charges, so that the dust removal function is realized, and a large amount of dust is prevented from entering the motor; because of the inlet port 11 just sets up rubber slab 15, and the effective air flow cross-sectional area of inlet port 11 is less than the area of rubber slab 15, the air strikes the rubber slab 15 earlier and is close to on the front side of air inlet 11, later to the diffusion flow all around of rubber slab 15 again for most dust adsorbs on the rubber slab 15 is close to the front side of air inlet 11, and then there is not the dust nearly at the dorsal part and the side of rubber slab 15.
In addition, the rotating plate 18 rotates at a high speed along with the rotor 4, the brush rod 23 drives the second sliding block 21 to slide outwards under the action of centrifugal force, the spring 22 is stretched, and the brush 24 on the side wall of the brush rod 23 can be separated from the side wall of the rubber plate 15, so that the brush 24 can not clean dust adsorbed on the side wall of the rubber plate 15 in the high-speed rotation process of the rotor 4, and the dust is effectively prevented from being cleaned and entering the interior of the rotor along with air flow; when the rotating speed of the rotor 4 is reduced, the airflow generated by the fan blades 7 basically stops, the centrifugal force applied to the brush rod 23 also becomes smaller, the second slider 21 is pulled to slide into the chute 20 under the action of the pulling force of the spring 22, the brush rod 23 is driven to be in frictional contact with the rubber plate 15, and then the rotating plate 18 gradually stops along with the rotor 4, the brushes 24 on the side wall of the brush rod 23 can clean dust on the side wall of the rubber plate 15 and fall to the inner bottom end of the motor end cover 2, the dust falling port on the side wall of the bottom end of the motor end cover 2 enters the dust collecting box 26 to be collected in a centralized manner, and after the motor body stops rotating, along with the disappearance of static charges, a small amount of dust remained on the rubber plate 15 can naturally fall.
Simultaneously, when the inside of motor generates heat and leads to the temperature higher seriously, the gas in the sliding cavity 8 of 2 lateral walls of motor end cover is heated and is expanded, exerts thrust to first slider 10, drives first slider 10 and slides for connecting rod 14 promotes the inside dust-proof cover plate 12 of air inlet 11, makes air inlet 11 be in the complete open mode, increases the draught area of air inlet 11, promotes the radiating effect.
While the present invention has been described in detail with reference to the preferred embodiments, it should be understood that the above description should not be taken as limiting the invention. Various modifications and alterations to this invention will become apparent to those skilled in the art upon reading the foregoing description. Accordingly, the scope of the invention should be determined from the following claims.
Claims (10)
1. A protector for a doubly salient PMSM, comprising:
a motor housing (1) in which a doubly salient permanent magnet synchronous motor is arranged;
the motor end cover (2) is fixedly connected to the side wall of the end part of the motor shell (1), an inner cavity is formed between the motor end cover and the motor shell (1) and between the motor end cover and the motor, a dust collection mechanism is arranged in the inner cavity, and meanwhile, a heat dissipation mechanism is arranged on the motor end cover (2);
the mounting seat (5) is provided with a hollow inner cavity and an opening, and the mounting seat (5) is fixedly connected to the inner side wall of the motor end cover (2);
the rotor (4) is arranged inside the motor shell (1), one end of the rotor penetrates through the opening of the mounting seat (5) and is rotatably connected to the motor end cover (2), and the other end of the rotor penetrates through the center of the doubly salient permanent magnet synchronous motor;
the sensor assembly (3) is fixedly installed on the outer side wall of the motor shell (1), and a temperature sensor and a vibration sensor are fixedly arranged inside the sensor assembly to control the motor to operate according to the monitored motor temperature and rotor vibration data, so that the motor can be effectively prevented from operating too hot.
2. The shield for a doubly salient permanent-magnet synchronous machine of claim 1, further comprising:
the supporting bearing (6) is fixedly arranged in the inner cavity of the mounting seat (5) and is used for supporting the rotor (4);
the fan blades (7) are fixedly sleeved on the side wall of the rotor (4) and are used for increasing air flow;
the ash collecting box (26) is fixedly arranged on the outer side wall of the bottom end of the motor end cover (2) and corresponds to an ash falling opening formed in a penetrating mode on the side wall of the bottom end of the motor end cover (2).
3. The protector for a doubly salient permanent-magnet synchronous machine of claim 2, wherein said dust-suction mechanism comprises: the two dust absorption mechanism components are symmetrically arranged on the side walls of the two sides of the mounting seat (5); the mounting ring (16) is fixedly sleeved on the rotor (4) and is positioned between the mounting seat (5) and the fan blades (7); the mounting ring (16) is used for connecting two dust suction mechanism components.
4. The protector for a doubly salient permanent-magnet synchronous machine of claim 3, wherein said suction mechanism assembly comprises:
the rubber plate (15) is arranged on one side wall of the mounting seat (5);
the fixing rod (17) is fixedly connected to the side wall of the mounting ring (16);
a rotating plate (18) fixedly connected to the end of the fixing rod (17);
a fur layer (19) one side of which is fixedly arranged on the side wall of the rotating plate (18) and the other side of which is in friction contact with the side wall of the rubber plate (15);
a chute (20) which is opened on the side wall of the end part of the rotating plate (18);
the second sliding block (21) is arranged in the sliding groove (20);
one end of the limiting block (27) is connected with one end of the second sliding block (21), and the other end of the limiting block is connected with the inner side wall of the sliding groove (20) through a spring (22);
the brush rod (23) is fixedly connected to one end, which is not connected with the limiting block (27), of the second sliding block (21), and a brush (24) is fixedly arranged on the side wall, opposite to the rubber plate (15), of the brush rod;
the overflow ring (25) is fixedly arranged on the inner side wall of the motor end cover (2) and can block the cleaned dust, so that the dust is prevented from being brought into the motor by airflow.
5. The protection device for the doubly salient permanent-magnet synchronous machine according to claim 4, characterized in that a bump (28) is arranged on the inner wall of one end of the sliding chute (20) close to the brush rod (23), the limit block (27) is arranged between the bump (28) and the spring (22), and the bump (28) and the limit block (27) jointly limit the moving range of the second slider (21) and prevent the second slider (21) from completely sliding out of the sliding chute (20).
6. The protector for doubly-salient permanent-magnet synchronous machine according to claim 4, wherein the brushes (24) are in frictional contact with the side walls of the rubber sheet (15) so that the rubber sheet (15) is provided with electrostatic nuclei due to friction.
7. The protector for doubly salient permanent-magnet synchronous machine according to claim 1, wherein said heat dissipating means are symmetrically provided on upper and lower side walls of the machine end cover (2), respectively; each heat dissipation mechanism includes:
the sliding cavity (8) is formed in the upper side wall or the lower side wall of the motor end cover (2), and a sliding opening (9) is formed in the sliding cavity (8);
the first sliding block (10) is arranged in the sliding cavity (8) and is in sealed sliding connection with the sliding cavity (8);
the air inlet (11) penetrates through the side wall of the end part of the motor end cover (2), and the inner side wall of the air inlet is connected with a dustproof cover plate (12) in a sliding manner;
a plurality of air holes (13) which penetrate through the dustproof cover plate (12) and are used for radiating heat and isolating dust in the air;
and one end of the connecting rod (14) is fixedly connected to the inner side wall of the dustproof cover plate (12), and the other end of the connecting rod is fixedly connected to the inner side wall of the first sliding block (10), so that the dustproof cover plate (12) is connected with the first sliding block (10) through the connecting rod (14) in a linkage mode.
8. The protection device for a doubly salient PMSM according to claim 7, characterized in that the inner cavity formed by the first slider (10) and the slide chamber (8) is provided with a gas susceptible to thermal expansion.
9. The protection device for the doubly salient permanent magnet synchronous machine according to any one of claims 1 to 8, wherein when the rotor (4) rotates at a high speed, the slide block (21) applies a thrust force to the brush rod (23) under the action of a centrifugal force and drives the brush (24) to separate from the rubber plate (15), so that dust adsorbed on the rubber plate (15) can be prevented from being swept down by the brush (24); when the rotating speed of the rotor (4) is reduced, centrifugal force is reduced, the spring (22) is contracted, the sliding block (21) is subjected to pulling force exerted by the spring (22), the brush (23) is in friction contact with the rubber plate (15), and accordingly dust adsorbed on the rubber plate (15) is cleaned off and is blocked by the overflow ring (25).
10. The protection device for the doubly salient permanent magnet synchronous motor according to any one of claims 1 to 8, wherein when the temperature inside the motor is higher, the gas in the sliding cavity (8) expands due to heating, a thrust is applied to the first slider (10), so that the first slider (10) applies the thrust to the connecting rod (14), the connecting rod (14) drives the dustproof cover plate (12) to slide, the air port (11) is completely opened, the air inflow is increased, the air flow exchange efficiency is improved, and the purpose of heat dissipation is achieved.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110519699.2A CN113178978A (en) | 2021-05-12 | 2021-05-12 | Protection device for be used for biconvex utmost point PMSM |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110519699.2A CN113178978A (en) | 2021-05-12 | 2021-05-12 | Protection device for be used for biconvex utmost point PMSM |
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| CN113178978A true CN113178978A (en) | 2021-07-27 |
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| CN202110519699.2A Pending CN113178978A (en) | 2021-05-12 | 2021-05-12 | Protection device for be used for biconvex utmost point PMSM |
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| CN (1) | CN113178978A (en) |
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| CN115133711A (en) * | 2022-08-26 | 2022-09-30 | 江苏中工高端装备研究院有限公司 | Permanent magnet motor with intelligent adjustable heat dissipation function |
| CN115603498A (en) * | 2022-11-14 | 2023-01-13 | 江苏微特利电机股份有限公司（Cn） | Built-in elastic heat dissipation device of motor |
| CN116021547A (en) * | 2022-08-17 | 2023-04-28 | 深圳市大族机器人有限公司 | Joint module and cooperative robot |
| CN116365776A (en) * | 2023-04-10 | 2023-06-30 | 常州宝龙电机股份有限公司 | Low-voltage high-current inner rotor permanent magnet synchronous servo motor |
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| CN116365776B (en) * | 2023-04-10 | 2024-03-19 | 常州宝龙电机股份有限公司 | Low-voltage high-current inner rotor permanent magnet synchronous servo motor |
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