CN110535271B

CN110535271B - Rotor iron core

Info

Publication number: CN110535271B
Application number: CN201910962523.7A
Authority: CN
Inventors: 不公告发明人
Original assignee: Taizhou Taili Electric Appliance Co ltd
Current assignee: Taizhou Taili Electric Appliance Co.,Ltd.
Priority date: 2019-10-11
Filing date: 2019-10-11
Publication date: 2021-04-06
Anticipated expiration: 2039-10-11
Also published as: CN110535271A

Abstract

The invention belongs to the technical field of motors, and particularly relates to a rotor core which comprises a core body, wherein the core body is formed by stacking a group of punching sheets; a group of winding grooves are uniformly distributed on the periphery of the iron core body, and a rotating shaft fixing hole is formed in the center of the iron core body; the iron core body between the adjacent winding slots is provided with spiral cooling holes, and the cooling holes are used for reducing the temperature of the iron core body and ensuring the normal work of the rotor iron core; when the iron core body continuously rotates during working, air continuously flows through the spiral cooling holes to take away heat emitted by the coil winding in the winding groove, so that the iron core body is ensured to be in a normal temperature range, and the phenomenon that when the temperature of the iron core body is overhigh, an insulating layer of an enameled wire in the coil winding is damaged, the coil winding is short-circuited, and motor faults are caused is prevented.

Description

Rotor iron core

Technical Field

The invention belongs to the technical field of motors, and particularly relates to a rotor core.

Background

The motor is an electromagnetic device which realizes electric energy conversion or transmission according to the electromagnetic induction law, and the motor is mainly used for generating driving torque and serving as a power source of electric appliances or various machines. Motors can be classified into dc motors, asynchronous motors, and synchronous motors according to their structures and operating principles, and the synchronous motors generally include permanent magnet synchronous motors, reluctance synchronous motors, and tape synchronous motors.

After the motor operates for a long time in a high-temperature environment, the tung oil fixing agent on the coil winding is easily melted when the temperature of a rotor core in the motor is too high, so that the coil winding is loosened when the rotor core rotates, and when the temperature of the rotor core continues to rise, the insulating property of an enameled wire in the coil winding is reduced, the internal short circuit of the coil winding is caused, and the normal operation of the motor is seriously influenced.

Disclosure of Invention

The invention provides a rotor core, which aims to make up the defects of the prior art and solve the problems that after a motor runs for a long time in a high-temperature environment, when the temperature of a rotor core in the motor is too high, a tung oil fixing agent on a coil winding is easy to melt, the coil winding is loosened when the rotor core rotates, and when the temperature of the rotor core continues to rise, the insulating property of an enameled wire in the coil winding is reduced, so that the internal short circuit of the coil winding is caused, and the normal running of the motor is seriously influenced.

The technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to a rotor iron core which comprises an iron core body, wherein the iron core body is formed by stacking a group of punching sheets; a group of winding grooves are uniformly distributed on the periphery of the iron core body, and a rotating shaft fixing hole is formed in the center of the iron core body; the iron core body between the adjacent winding slots is provided with spiral cooling holes, and the cooling holes are used for reducing the temperature of the iron core body and ensuring the normal work of the rotor iron core; when the iron core body constantly rotates at the during operation, the air constantly flows through from the spiral cooling hole, takes away the heat that coil winding sent in the wire winding groove, guarantees that the iron core body is in normal temperature range, prevents when the iron core body high temperature, damages the insulating layer of the enameled wire in the coil winding, causes the coil winding short circuit, causes motor fault.

Preferably, a ring is arranged in the cooling hole, and a group of bristles are uniformly arranged on the ring; annular clamping grooves are formed in the positions, close to the two ends, in the cooling holes, clamping rings are arranged in the clamping grooves and used for preventing the circular rings from falling off from the cooling holes; the bristles on the circular ring slide in the cooling holes, so that dust deposition is reduced, and the cooling capacity of the cooling holes is further improved; constantly start, stop and change the direction of rotation at rotatory in-process through the iron core body for the ring is because self inertia constantly reciprocating sliding in the cooling hole, and then drives the brush hair and constantly clears up the cooling hole inner wall, reduces adhering to of cooling hole inner wall dust, further guarantees cooling hole heat dispersion.

Preferably, the circular ring is made of elastic rubber and can be twisted along the self annular axis; the tail ends of the bristles close to one side of the inner wall of the cooling hole abut against the inner wall of the cooling hole, so that the bristles drive the circular ring to roll in the cooling hole after being extruded and deformed, the moving speed of the circular ring in the cooling hole is reduced, and the influence of the cooling ring on the dynamic balance of the iron core body is reduced; because the brush hair is in the extrusion bending state in the cooling hole, make brush hair intercommunication ring can not freely slide in the cooling hole, constantly start at rotatory in-process when iron core body, when stopping and change direction of rotation, the ring has the trend of motion because self inertia, the ring twists reverse along the ring axis of self under inertial effect this moment and rolls, it removes to drive the brush hair after rolling in the cooling hole, thereby the moving speed of ring has been reduced when clearing up the cooling hole, and then reduce the impact to the snap ring when the ring moves to the cooling hole both ends, reduce iron core body's vibration, dynamic balance's when further reducing the rotation to iron core body influence, guarantee iron core body steady safe operation.

Preferably, a threaded hole is formed in the inner wall of the cooling hole, close to one side of the outer portion of the iron core body, of the clamping ring, and the threaded hole penetrates through the iron core body outwards along the radius direction of the iron core body; a pin is connected in the threaded hole in a threaded manner, a hexagonal countersunk blind hole is formed in one end, away from the cooling hole, of the pin, and the end, extending into the cooling hole, of the pin is used for preventing the clamping ring from loosening; the screw hole steps up iron core body both ends face after-fixing on the graduated disk through anchor clamps, later drill through the drilling machine, it makes to attack the screw thread at last, step up iron core body both ends through anchor clamps, make and can not warp the shape perk towards the piece at drilling and tapping in-process, further reduce the dynamic balance who destroys the iron core body, insert and rotatory pin in the screw hole, make the pin stretch into the cooling hole after the one end rotation that is close to the cooling hole, it is fixed to further blockking of snap ring, it drops to reduce the snap ring accident after the ring strikes, the snap ring of high-speed motion causes the damage to the components and parts in the motor, security when further guaranteeing iron core body operation.

Preferably, the length of the pin is larger than the depth of the threaded hole, the dynamic balance of the iron core body can be adjusted by rotating the depth of the pin, and the rotation stability of the iron core body is improved; insert the countersunk head blind hole through the allen key and rotate, and then adjust the degree of depth of pin for the distance of pin apart from iron core body rotation center changes, and then can adjust the dynamic balance when iron core body is rotatory, further improves the rotational stability of iron core body during operation, reduces the vibration of motor, prolongs the life of the pivot upper bearing that links firmly with iron core body.

Preferably, the middle part of the pin is sleeved with a group of PVC rings, and the diameter of each PVC ring is slightly larger than that of the pin; the PVC ring is in interference fit with the threaded hole; the probability of pin falling is reduced through the interference fit of the PVC ring and the threaded hole, and the safety of the iron core body during operation is ensured; through the interference fit of PVC ring and screw hole, reduce the not hard up of pin at the rotatory in-process of iron core body, reduce the probability that the pin drops, further guarantee iron core body's integrality, guarantee the normal operating of motor.

The invention has the following beneficial effects:

1. according to the rotor core, when the core body rotates continuously during working, air continuously flows through the spiral cooling holes to take away heat generated by the coil winding in the winding groove, so that the core body is ensured to be in a normal temperature range, and when the temperature of the core body is too high, the insulating layer of an enameled wire in the coil winding is prevented from being damaged, the coil winding is prevented from being short-circuited, and motor faults are caused.

2. According to the rotor iron core, the bristles in the extrusion bending state in the cooling hole enable the bristles to be communicated with the circular ring and cannot slide freely in the cooling hole, when the iron core body is continuously started, stopped and changed in rotation direction in the rotation process, the circular ring tends to move due to self inertia, the circular ring is twisted and rolled along the annular axis of the circular ring under the action of inertia, the bristles are driven to move after rolling in the cooling hole, the movement speed of the circular ring is reduced while the cooling hole is cleaned, impact on the clamping ring when the circular ring moves to two ends of the cooling hole is reduced, vibration of the iron core body is reduced, the influence on dynamic balance when the iron core body rotates is further reduced, and stable and safe operation of the iron core body is guaranteed.

Drawings

The invention will be further explained with reference to the drawings.

FIG. 1 is a perspective view of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

FIG. 3 is an enlarged view of a portion of FIG. 1 at B;

FIG. 4 is a block diagram of a pin according to the present invention;

in the figure: iron core body 1, wire winding groove 2, pivot fixed orifices 3, cooling hole 4, ring 5, brush hair 6, draw-in groove 7, snap ring 8, screw hole 9, pin 10, countersunk head blind hole 11, PVC ring 12.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

As shown in fig. 1 to 4, the rotor core of the present invention includes a core body 1, where the core body 1 is formed by stacking a set of punching sheets; a group of winding grooves 2 are uniformly distributed on the periphery of the iron core body 1, and a rotating shaft fixing hole 3 is formed in the center of the iron core body 1; a spiral cooling hole 4 is formed in the iron core body 1 between the adjacent winding slots 2, and the cooling hole 4 is used for reducing the temperature of the iron core body 1 and ensuring the normal work of the rotor iron core; when iron core body 1 constantly rotates at the during operation, the air constantly flows through from spiral cooling hole 4, takes away the heat that coil winding sent in winding groove 2, guarantees that iron core body 1 is in normal temperature range, prevents that iron core body 1 when the high temperature, damages the insulating layer of the enameled wire in the coil winding, causes the coil winding short circuit, causes motor fault.

As an embodiment of the invention, a circular ring 5 is arranged in the cooling hole 4, and a group of bristles 6 are uniformly arranged on the circular ring 5; an annular clamping groove 7 is formed in the cooling hole 4 and is close to the two ends, a clamping ring 8 is arranged in the clamping groove 7, and the clamping ring 8 is used for preventing the circular ring 5 from falling from the cooling hole 4; the bristles 6 on the circular ring 5 slide in the cooling hole 4, so that dust deposition is reduced, and the cooling capacity of the cooling hole 4 is further improved; constantly start, stop and change the direction of rotation at rotatory in-process through iron core body 1 for ring 5 is because self inertia constantly reciprocating sliding in cooling hole 4, and then drives brush hair 6 constantly and clears up the inner wall of cooling hole 4, reduces the adhesion of the 4 inner walls dust of cooling hole, further guarantees 4 heat dispersion of cooling hole.

As an embodiment of the present invention, the circular ring 5 is made of elastic rubber and can be twisted along its own circular axis; the tail ends of the bristles 6 close to one side of the inner wall of the cooling hole 4 abut against the inner wall of the cooling hole 4, so that the bristles 6 drive the circular ring 5 to roll in the cooling hole 4 after being extruded and deformed, the moving speed of the circular ring 5 in the cooling hole 4 is reduced, and the influence of the cooling ring on the dynamic balance of the iron core body 1 is reduced; because brush hair 6 is in the extrusion bending state in cooling hole 4, make brush hair 6 intercommunication ring 5 can not freely slide in cooling hole 4, constantly start at rotatory in-process when iron core body 1, when stopping and change direction of rotation, ring 5 has the trend of motion because self inertia, ring 5 twists reverse the roll along self ring axis under inertial effect this moment, it removes to drive brush hair 6 after rolling in cooling hole 4, thereby reduced the velocity of motion of ring 5 in clearance cooling hole 4, and then reduce the impact to snap ring 8 when ring 5 moves cooling hole 4 both ends, reduce the vibration of iron core body 1, dynamic balance's influence when further reducing iron core body 1 rotatory, guarantee the steady safe operation of iron core body 1.

As an embodiment of the invention, a threaded hole 9 is formed in the inner wall of the cooling hole 4 on one side of the snap ring 8 close to the outside of the iron core body 1, and the threaded hole 9 penetrates through the iron core body 1 outwards along the radius direction of the iron core body 1; a pin 10 is connected in the threaded hole 9 in a threaded manner, a hexagonal countersunk blind hole 11 is formed in one end, away from the cooling hole 4, of the pin 10, and the end, extending into the cooling hole 4, of the pin 10 is used for preventing the clamp ring 8 from loosening; screw hole 9 steps up 1 both ends face after-fixing of iron core body on the graduated disk through anchor clamps, later drill through the drilling machine, it makes to attack the screw thread at last, step up 1 both ends of iron core body through anchor clamps, make and can not warp the shape perk towards the piece at drilling and tapping in-process, further reduce the dynamic balance who destroys iron core body 1, insert and rotatory pin 10 in screw hole 9, make pin 10 stretch into cooling hole 4 after being close to the one end rotation of cooling hole 4, it is fixed to carry out further blockking to snap ring 8, it drops to reduce snap ring 8 and strike the back accident at ring 5, the snap ring 8 of high-speed motion causes the damage to the components and parts in the motor, further security when guaranteeing iron core body 1 operation.

As an embodiment of the present invention, the length of the pin 10 is greater than the depth of the threaded hole 9, and the dynamic balance of the iron core body 1 can be adjusted by rotating the depth of the pin 10, so as to improve the rotational stability of the iron core body 1; insert the countersunk head blind hole 11 through the allen key and rotate, and then adjust the degree of depth of pin 10 for the distance of pin 10 apart from 1 rotation center of iron core body changes, and then can adjust the dynamic balance when iron core body 1 is rotatory, further improves the rotational stability of iron core body 1 during operation, reduces the vibration of motor, prolongs the life of bearing in the pivot that links firmly with iron core body 1.

As an embodiment of the invention, a group of PVC rings 12 is sleeved in the middle of the pin 10, and the diameter of the PVC ring 12 is slightly larger than that of the pin 10; the PVC ring 12 is in interference fit with the threaded hole 9; the probability of falling off of the pin 10 is reduced through the interference fit of the PVC ring 12 and the threaded hole 9, and the safety of the iron core body 1 during operation is ensured; through the interference fit of PVC ring 12 and screw hole 9, reduce the not hard up of pin 10 in the rotatory in-process of iron core body 1, reduce the probability that pin 10 drops, further guarantee iron core body 1's integrality, guarantee the normal operating of motor.

When the iron core body 1 works, the iron core body 1 continuously rotates, air continuously flows through the spiral cooling holes 4, heat emitted by the coil winding in the winding groove 2 is taken away, the iron core body 1 is ensured to be in a normal temperature range, and when the temperature of the iron core body 1 is too high, the insulating layer of an enameled wire in the coil winding is prevented from being damaged, the coil winding is prevented from being short-circuited, and motor faults are caused; the iron core body 1 is continuously started, stopped and changed in rotation direction in the rotation process, so that the circular ring 5 continuously slides in a reciprocating manner in the cooling hole 4 due to self inertia, the brush bristles 6 are further driven to continuously clean the inner wall of the cooling hole 4, the adhesion of dust on the inner wall of the cooling hole 4 is reduced, and the heat dissipation performance of the cooling hole 4 is further ensured; because the bristles 6 are in an extrusion bending state in the cooling holes 4, the bristles 6 are communicated with the circular ring 5 and cannot slide freely in the cooling holes 4, when the iron core body 1 is continuously started, stopped and changed in rotation direction, the circular ring 5 tends to move due to self inertia, at the moment, the circular ring 5 twists and rolls along the circular axis of the circular ring under the action of inertia, and the bristles 6 are driven to roll in the cooling holes 4 and then move, so that the movement speed of the circular ring 5 is reduced while the cooling holes 4 are cleaned, the impact on the snap ring 8 when the circular ring 5 moves to two ends of the cooling holes 4 is reduced, the vibration of the iron core body 1 is reduced, the influence on the dynamic balance when the iron core body 1 rotates is further reduced, and the stable and safe operation of the iron core body 1 is ensured; the threaded holes 9 are fixedly formed in the index plate after the two end faces of the iron core body 1 are fastened through the clamp, then drilling is carried out through the drilling machine, finally tapping is carried out, the two ends of the iron core body 1 are fastened through the clamp, so that the punching sheet cannot deform and tilt in the drilling and tapping processes, the dynamic balance of the iron core body 1 is further reduced, the pin 10 is inserted into the threaded holes 9 and rotated, one end, close to the cooling hole 4, of the pin 10 extends into the cooling hole 4 after being rotated, the snap ring 8 is further blocked and fixed, the accidental falling of the snap ring 8 after the impact of the ring 5 is reduced, the snap ring 8 moving at a high speed damages components in the motor, and the safety of the iron core body 1 during operation is further ensured; the inner hexagonal wrench is inserted into the countersunk blind hole 11 to rotate, so that the depth of the pin 10 is adjusted, the distance between the pin 10 and the rotating center of the iron core body 1 is changed, the dynamic balance of the iron core body 1 during rotation can be adjusted, the rotating stability of the iron core body 1 during operation is further improved, the vibration of a motor is reduced, and the service life of a bearing on a rotating shaft fixedly connected with the iron core body 1 is prolonged; through the interference fit of PVC ring 12 and screw hole 9, reduce the not hard up of pin 10 in the rotatory in-process of iron core body 1, reduce the probability that pin 10 drops, further guarantee iron core body 1's integrality, guarantee the normal operating of motor.

The front, the back, the left, the right, the upper and the lower are all based on figure 1 in the attached drawings of the specification, according to the standard of the observation angle of a person, the side of the device facing an observer is defined as the front, the left side of the observer is defined as the left, and the like.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplifying the description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the scope of the present invention.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A rotor core, characterized by: the iron core comprises an iron core body (1), wherein the iron core body (1) is formed by stacking a group of punching sheets; a group of winding grooves (2) are uniformly distributed on the periphery of the iron core body (1), and a rotating shaft fixing hole (3) is formed in the center of the iron core body (1); spiral cooling holes (4) are formed in the iron core body (1) between the adjacent winding slots (2), and the cooling holes (4) are used for reducing the temperature of the iron core body (1) and ensuring the normal work of the rotor iron core;

a circular ring (5) is arranged in the cooling hole (4), and a group of bristles (6) are uniformly arranged on the circular ring (5); annular clamping grooves (7) are formed in the positions, close to the two ends, in the cooling holes (4), clamping rings (8) are arranged in the clamping grooves (7), and the clamping rings (8) are used for preventing the circular rings (5) from falling off from the cooling holes (4); through the sliding of the bristles (6) on the circular ring (5) in the cooling hole (4), the dust deposition is reduced, and the cooling capacity of the cooling hole (4) is further increased.

2. A rotor core according to claim 1, wherein: the circular ring (5) is made of elastic rubber and can be twisted along the annular axis of the circular ring; the tail ends of the bristles (6) close to one side of the inner wall of the cooling hole (4) abut against the inner wall of the cooling hole (4), so that the bristles (6) are extruded and deformed to drive the circular ring (5) to roll in the cooling hole (4), the moving speed of the circular ring (5) in the cooling hole (4) is reduced, and the influence of the cooling ring on the dynamic balance of the iron core body (1) is reduced.

3. A rotor core according to claim 1, wherein: the inner wall of the cooling hole (4) at one side of the snap ring (8) close to the outer part of the iron core body (1) is provided with a threaded hole (9), and the threaded hole (9) penetrates through the iron core body (1) outwards along the radius direction of the iron core body (1); threaded connection has pin (10) in screw hole (9), and hexagonal countersunk blind hole (11) are seted up to the one end that cooling hole (4) were kept away from in pin (10), and the one end that pin (10) stretched into cooling hole (4) is used for preventing that snap ring (8) are not hard up.

4. A rotor core according to claim 3, wherein: the length of the pin (10) is larger than the depth of the threaded hole (9), the dynamic balance of the iron core body (1) can be adjusted through the depth of the rotating pin (10), and the rotation stability of the iron core body (1) is improved.

5. A rotor core according to claim 4, characterized in that: the middle part of the pin (10) is sleeved with a group of PVC rings (12), and the diameter of each PVC ring (12) is slightly larger than that of the pin (10); the PVC ring (12) is in interference fit with the threaded hole (9); the interference fit of the PVC ring (12) and the threaded hole (9) reduces the falling probability of the pin (10), and the safety of the iron core body (1) during operation is guaranteed.