A self-cooling high-speed permanent magnet motor and negative pressure fan

Abstract

The present invention discloses a self-cooling high-speed permanent magnet motor and a negative pressure fan, which belong to the field of motor technology, and include a support shell, a cooling hole shell and a collar, wherein the cooling hole shell is fixed to the inner wall of the support shell, and the collar is fixed to one side of the cooling hole shell, and a synchronous switching mechanism is installed on one side of the collar; the synchronous switching mechanism includes a driving gear rotatably installed on one side of the collar. The present invention uses a synchronous switching mechanism, when the main ball is worn and missing and needs to be replaced, the controller starts the reduction motor to drive the driving gear to rotate in the forward direction, and multiple flip plates and the collar are separated. After the multiple flip plates rotate 180 degrees, the reduction motor is started to drive the driving gear to rotate in the reverse direction, and the transmission shaft can continue to contact with multiple unworn spare balls, so that the fluctuation amplitude of the transmission shaft can be known in time, and each main ball can be quickly replaced in time, so as to avoid the continuous increase in the wear size of the transmission shaft and cause damage, and the durability of the permanent magnet motor is better.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and in particular to a self-cooling high-speed permanent magnet motor and a negative pressure fan. Background Art

[0002] Negative pressure fans are mainly used in combination with self-cooling high-speed permanent magnet motors. The self-cooling high-speed permanent magnet motors combine the advantages of high-speed permanent magnet motors and self-cooling technology, and have the characteristics of high efficiency and high power density. They can significantly improve the operating efficiency of the equipment and reduce energy consumption. Secondly, the blades are combined with automatic heat dissipation cooling technology to provide a better power source for the negative pressure fan.

[0003] After searching the existing published technical documents, the Chinese patent announcement number CN208337346U discloses a motor and a negative pressure fan thereof. The motor is mainly arranged inside the motor through a driver, and the heat generated by the driver is conducted to the casing by the rear end cover, which can reduce the overall volume of the motor. Furthermore, when used to drive the negative pressure fan, the air flow generated by the operation of the negative pressure fan can help dissipate heat from the casing. However, the motor has the following problems.

[0004] The permanent magnet motor realizes high-speed self-cooling drive after being powered on, by providing strong negative pressure power to the negative pressure fan. During the high-speed rotation process, the rotor shaft part needs to realize rolling limit through the balls inside multiple bearings to ensure that the permanent magnet rotor shaft part of the permanent magnet motor can realize stable rotation. With long-term high-speed rotation, the balls will wear out, and the permanent magnet rotor shaft of the permanent magnet motor will fluctuate greatly. The wear will continue, causing the permanent magnet rotor shaft to easily deviate and rotate and be damaged. Therefore, it is difficult to know the fluctuation amplitude of the permanent magnet rotor shaft in time, and it is difficult to quickly replace each ball in time to avoid damage caused by large wear of the permanent magnet rotor shaft. The durability of the permanent magnet motor is poor. Therefore, a self-cooling high-speed permanent magnet motor and a negative pressure fan are provided. Summary of the invention

[0005] To this end, the present invention provides a self-cooling high-speed permanent magnet motor and a negative pressure fan to solve the technical problems existing in the prior art.

[0006] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a self-cooling high-speed permanent magnet motor, comprising a support shell, a cooling hole shell and a collar, wherein the cooling hole shell is fixed to the inner wall of the support shell, the collar is fixed to one side of the cooling hole shell, and a synchronous switching mechanism is installed on one side of the collar; the synchronous switching mechanism comprises a driving gear rotatably installed on one side of the collar, and a reduction motor is installed on one side of the driving gear, the outer wall of the output end of the reduction motor is fixedly connected to the inner wall of the driving gear, and the outer wall of the driving gear is meshingly connected to a linkage gear ring; a rotating ring is fixedly installed on the inner wall of the linkage gear ring The swivel wheel has two guide wheels, one of which is for use with a plurality of drive wheels, and the other is for use with a plurality of control wheels, wherein the guide wheels are connected to the swivel wheel by a plurality of control wheels, and the control wheels are connected to the swivel wheel by a plurality of control wheels.

[0007] Preferably, the plurality of rotating frames are arranged in a circular ring with equal spacing, and the plurality of flip plates are arranged in a circular ring with equal spacing. The inner wall of the cooling hole shell and near its top end are rollingly connected with a spare ball, and the inner wall of the flip plate and near its bottom end are rollingly connected with a main ball; one side of the spare ball and the main ball are both rotatably connected with a threaded sleeve, and the two threaded sleeves are fixedly connected to the flip plate by bolts, and the plurality of main balls are rollingly connected to the transmission shaft.

[0008] Preferably, a sliding frame is slidably connected to one side of the rotating shaft, a limiting ring is connected to one side of the sliding frame, the limiting ring and the rotating shaft are both slidably connected to the sliding frame, and the limiting ring is fixedly connected to the rotating shaft; a distance sensor is fixedly installed on the top of the inner wall of one of the sliding frames. A limiting support ring is rotatably connected to one side of the rotating ring, and a supporting ring is fixedly connected to the inner wall of the limiting support ring, and the supporting ring is fixedly connected to the sleeve ring; a support block is installed on one side of the reduction motor, and the sleeve ring and the reduction motor are fixedly connected to the support block; a stator is fixedly installed inside the support shell, a permanent magnet rotor is rotatably connected to the inside of the stator, the permanent magnet rotor is rotatably connected to the support shell, one end of the permanent magnet rotor is fixedly connected to the transmission shaft, and a cooling blade is fixedly connected to the outer wall of the permanent magnet rotor and away from the transmission shaft, and the cooling blade is used to cool the inside of the cooling hole shell.

[0009] In this technical solution, the reduction motor is started to drive the driving gear to rotate in the forward direction, the collar provides support force to the support block, the linkage gear ring can carry the swivel to rotate, and the swivel rotates on the outer wall of the support ring. The swivel carries multiple rotating frames to rotate counterclockwise, and multiple limit slides can move away from the center point of the transmission shaft. The sleeve slider carries the rotating shaft to move upward, and the flip plate moves out from the inside of the collar. The flip plate drives the two threaded sleeves to move upward. The threaded sleeve moves upward with the main ball, and the other threaded sleeve moves upward with the spare ball. The sleeve slider moves upward along the inner wall of the slide frame, and the sleeve slider carries the limit ring to move upward. The limit ring moves upward along the slide frame. When the top surface of the sleeve slider contacts the bottom of the distance sensor, when the sensing distance of the distance sensor is zero, the reduction motor is turned off through the controller.

[0010] Preferably, the switching positioning mechanism includes a switching motor fixedly mounted on the other end of the rotating shaft; a bracket is fixedly connected to the upper surface of the switching motor, and the bracket is fixedly connected to the sleeve slider, a proximity sensor is fixedly mounted on one side of the inner wall of the bracket, and two induction strips are arranged below the proximity sensor, and the two induction strips are fixedly connected to the rotating shaft, and a gap is formed between the induction strips and the proximity sensor. The two induction strips are symmetrically arranged about the center point of the rotating shaft, and the vertical cross-section of the bracket is L-shaped.

[0011] In this technical solution, the controller starts multiple switching motors, which drive the shaft to rotate. The shaft carries the flip plate to rotate 180 degrees, and the flip plate carries the main ball and the threaded sleeve to rotate synchronously, so that the positions of the main ball and the spare ball are swapped. At the same time, the shaft carries two sensor strips to rotate. When the lower sensor strip rotates to the sensing part at the bottom of the proximity sensor, the controller turns off the switching motor after the proximity sensor is sensed.

[0012] Preferably, the fluctuation detection component includes a contact roller, a rotating rod, a sleeve concave rod, a sleeve block and a rubber pad; the contact roller is rotatably connected above the outer wall of the transmission shaft, the rotating rod is fixedly connected to one end of the contact roller, the sleeve concave rod is rotatably connected to the outer wall of the rotating rod, the contact roller and the sleeve concave rod are rotatably connected, the sleeve block is slidably located on the outer wall of the sleeve concave rod, and the rubber pad is fixedly connected to the top of the sleeve concave rod; the fluctuation detection component also includes a sleeve support block, a fluctuation distance sensor, a fluctuation block and a support frame; the sleeve support block is fixed on the top of the rubber pad, the fluctuation distance sensor is fixedly located on the inner wall of the sleeve support block, the sleeve support block is fixedly connected to the sleeve block, the fluctuation block is fixedly connected to the outer wall of the sleeve concave rod and is located below the fluctuation distance sensor, the fluctuation distance sensor is used to sense the distance of the fluctuation block, the support frame is fixedly installed on the outer wall of the sleeve block, and the bottom end of the support frame is fixedly connected to the outer wall of the support ring; a controller is fixedly installed in front of the support shell. The wave block is slidably connected to the sleeve support block, and the cross-sectional shape of the rubber pad is rectangular.

[0013] In this technical solution, when the transmission shaft rotates and shakes, the transmission shaft will carry the contact roller to move vertically upward, the contact roller drives the rotating rod to rotate vertically, the sleeve concave rod vertically fluctuates along the inner wall of the sleeve block, the sleeve concave rod drives the rubber pad to achieve vertical fluctuating compression, and the fluctuating distance sensor can sense the distance of the fluctuating block. When the fluctuating distance sensed by the fluctuating distance sensor is the same as the fluctuating replacement distance set by the controller, it is immediately known that multiple main ball bearings on the outer wall of the transmission shaft are worn.

[0014] A negative pressure fan comprises a negative pressure fan casing fixed to one side of a supporting casing, wherein the inner wall of the negative pressure fan casing is rotatably connected with negative pressure blades; the inner wall of the negative pressure blades is fixedly connected to the outer wall of a transmission shaft, and the outer wall of the transmission shaft is rotatably connected to the inner wall of the negative pressure fan casing.

[0015] In this technical solution, when the transmission shaft can carry the negative pressure blades to rotate, the negative pressure blades can generate high-speed rotation force inside the negative pressure fan housing, and negative pressure can be generated inside the support housing to achieve the conveying operation and the negative pressure exhaust operation.

[0016] The present invention has the following advantages:

[0017] 1. The present invention uses a synchronous switching mechanism. When the main ball is worn and missing and needs to be replaced, the controller starts the reduction motor to drive the driving gear to rotate in the forward direction, and the multiple flip plates are separated from the collar. When the multiple flip plates are separated from the collar, the controller turns off the reduction motor. After the multiple flip plates rotate one hundred and eighty degrees, the reduction motor is started to drive the driving gear to rotate in the reverse direction. The multiple flip plates can be inserted into the collar, and the multiple spare balls are in contact with the outer walls of the multiple transmission shafts. The transmission shaft can continue to contact with the multiple unworn spare balls to achieve stable rotation drive, and self-cooling operation can be achieved through cooling blades. In this way, the interior of the cooling hole shell can be kept in a low temperature state for self-cooling operation. In this way, the fluctuation amplitude of the transmission shaft can be known in time, and each main ball can be quickly replaced in time to avoid the continuous increase in the wear size of the transmission shaft and damage, and the permanent magnet motor has better durability.

[0018] 2. The present invention adopts a switching positioning mechanism, and multiple main ball bearings can be moved out from the inside of the ring to start multiple switching motors. The bracket supports the switching motor and the bracket supports the proximity sensor at the same time. The switching motor drives the rotating shaft to rotate, and the rotating shaft rotates inside the sleeve slider. When the sensing bar below rotates to the sensing part at the bottom of the proximity sensor, the controller turns off the switching motor after the proximity sensor senses it. Multiple main ball bearings and multiple spare ball bearings can be synchronously and quickly switched to the specified replacement position, realizing synchronous batch docking and replacement of positions, avoiding damage to the transmission shaft caused by continuous use, and the permanent magnet motor has better durability.

[0019] 3. The present invention uses a fluctuation detection component. When the transmission shaft rotates and shakes, the transmission shaft will carry the contact roller to move vertically upward, and the contact roller can rotate along with the transmission shaft. The contact roller drives the rotating rod to rotate vertically, and the sleeve concave rod vertically fluctuates along the inner wall of the sleeve block. The sleeve concave rod drives the rubber pad to achieve vertical fluctuation compression, and the sleeve concave rod carries the fluctuation block to fluctuate vertically. When the fluctuation distance sensed by the fluctuation distance sensor is the same as the fluctuation replacement distance set by the controller, it is timely known that multiple main ball bearings are worn to the extent that they need to be replaced, and the stator is immediately closed through the controller to realize automatic replacement operation, so that the fluctuation amplitude of the transmission shaft is timely known, and multiple main ball bearings are automatically replaced in time to avoid damage caused by continuous shaking of the transmission shaft. The permanent magnet motor has better durability.

[0020] According to the mutual influence of the above-mentioned multiple effects, the sleeve concave rod first drives the rubber pad to realize vertical fluctuation compression, the sleeve concave rod carries the fluctuation block to fluctuate vertically, and the fluctuation amplitude of the transmission shaft is detected in time, and then the multiple flip plates and the sleeve rings are separated, and finally the multiple main balls and the multiple spare balls are quickly switched synchronously, and the transmission shaft can continue to contact the multiple unworn spare balls. In summary, the fluctuation amplitude of the transmission shaft can be known in time, and each main ball can be quickly replaced in time to avoid the continuous increase of the wear size of the transmission shaft and damage to the transmission shaft, and the durability of the permanent magnet motor is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0022] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment of size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0023] Figure 1 It is a schematic diagram of the overall structure of the self-cooling high-speed permanent magnet motor and the negative pressure fan of the present invention;

[0024] Figure 2 It is a schematic diagram of the vertical cross-section structure of the self-cooling high-speed permanent magnet motor and the negative pressure fan of the present invention;

[0025] Figure 3 For the present invention Figure 2 The enlarged structural diagram at A in the middle;

[0026] Figure 4 It is a schematic diagram of the local structure of the vertical section of the connection between the transmission shaft and the negative pressure blade of the present invention;

[0027] Figure 5 For the present invention Figure 4 The enlarged structural diagram at B in the middle;

[0028] Figure 6 It is a schematic diagram of the local structure of the vertical section of the connection between the distance sensor and the sliding frame of the present invention when viewed from above;

[0029] Figure 7 It is a schematic diagram of a partial structure of a vertical section of the connection between the sleeve sliding block and the rotating shaft of the present invention;

[0030] Figure 8 It is a schematic diagram of the main structure of the wave detection component of the present invention;

[0031] Fig. 9 It is a schematic diagram of a partial structure of the connection between the sleeve concave rod and the sleeve block of the present invention;

[0032] In the figure, 1, support shell; 2, cooling hole shell; 3, collar; 4, driving gear; 5, reduction motor; 6, linkage gear ring; 7, rotating ring; 8, rotating frame; 9, limit slide bar; 10, sleeve slide block; 11, rotating shaft; 12, flip plate; 13, spare ball; 14, main ball; 15, threaded sleeve block; 16, slide frame; 17, distance sensor; 18, limit ring; 19, limit support ring; 20, support ring; 21, support block; 22 , stator; 23, permanent magnet rotor; 24, cooling blades; 25, transmission shaft; 26, switching motor; 27, bracket; 28, proximity sensor; 29, induction strip; 30, contact roller; 31, rotating rod; 32, sleeve concave rod; 33, sleeve block; 34, rubber pad; 35, sleeve support block; 36, fluctuation distance sensor; 37, fluctuation block; 38, support frame; 39, controller; 40, negative pressure fan casing; 41, negative pressure blades. DETAILED DESCRIPTION

[0033] The following is a description of the implementation of the present invention by specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] As attached Figure 1 - Fig. 9A self-cooling high-speed permanent magnet motor is shown, which is provided with a synchronous switching mechanism, a switching positioning mechanism, and a fluctuation detection component. The settings of each mechanism and component can timely know the fluctuation amplitude of the transmission shaft 25, and quickly replace each main ball 14 in time to avoid the transmission shaft 25 from being worn and continuously enlarged in size, and avoid causing damage to the transmission shaft 25. The permanent magnet motor has better durability, and the specific structural settings of each mechanism and component are as follows.

[0035] In this embodiment, as shown in the attached Figure 1 - Figure 6 As shown, the cooling hole shell 2 is fixed on the inner wall of the supporting shell 1, the collar 3 is fixed on one side of the cooling hole shell 2, and a synchronous switching mechanism is installed on one side of the collar 3; the synchronous switching mechanism includes a driving gear 4 rotatably installed on one side of the collar 3, and a reduction motor 5 is installed on one side of the driving gear 4, the outer wall of the output end of the reduction motor 5 is fixedly connected to the inner wall of the driving gear 4, and the outer wall of the driving gear 4 is meshingly connected with a linkage gear ring 6.

[0036] A swivel 7 is fixedly installed on the inner wall of the linkage gear ring 6, and the swivel 7 and the linkage gear ring 6 are rotatably connected to the ring 3. A plurality of rotating frames 8 are fixedly connected to the outer wall of the swivel 7 and located on one side of the linkage gear ring 6, and the inner wall of each rotating frame 8 is slidably connected to a limiting slide bar 9; one end of the limiting slide bar 9 is fixedly connected to a sleeve slider 10, and the inner wall of the sleeve slider 10 is rotatably connected to a rotating shaft 11, and one end of the rotating shaft 11 is fixedly connected to a flip plate 12, and the plurality of flip plates 12 are slidably connected to the ring 3; a switching positioning mechanism is installed on the other end of the rotating shaft 11; a transmission shaft 25 is rotatably connected to the inner wall of the ring 3, and a fluctuation detection component is provided above the outer wall of the transmission shaft 25.

[0037] In this embodiment, as shown in the attached Figure 3 - Figure 7As shown, the inner wall of the cooling hole shell 2 and near its top end are rollingly connected with a spare ball 13, and the inner wall of the flip plate 12 and near its bottom end are rollingly connected with a main ball 14; one side of the spare ball 13 and the main ball 14 are rotatably connected with a threaded sleeve 15, and the two threaded sleeves 15 are fixedly connected to the flip plate 12 by bolts, and multiple main balls 14 are rollingly connected to the transmission shaft 25, so that the flip plate 12 can drive the two threaded sleeves 15 to move upward, the threaded sleeve 15 moves up with the main ball 14, and the other threaded sleeve 15 carries the spare ball 13 to move up, so as to facilitate the moving and separating operation. A sliding frame 16 is slidably connected to one side of the rotating shaft 11, and a limit ring 18 is connected to one side of the sliding frame 16. The limit ring 18 and the rotating shaft 11 are both slidably connected to the sliding frame 16, and the limit ring 18 is fixedly connected to the rotating shaft 11; a distance sensor 17 is fixedly installed on the top of the inner wall of one of the sliding frames 16, so that the sleeve sliding block 10 can carry the limit ring 18 to move upward, and the limit ring 18 moves upward along the sliding frame 16. When the top surface of the sleeve sliding block 10 contacts the bottom end of the distance sensor 17 and the sensing distance of the distance sensor 17 is zero, the reduction motor 5 is turned off through the controller 39 to achieve precise guided separation operation.

[0038] In this embodiment, as shown in the attached Figure 3 - Figure 4 As shown, one side of the swivel 7 is rotatably connected to the limit support ring 19, and the inner wall of the limit support ring 19 is fixedly connected with a support ring 20, and the support ring 20 is fixedly connected to the sleeve ring 3, so that the swivel 7 rotates on the limit support ring 19, and the swivel 7 rotates on the outer wall of the support ring 20; a support block 21 is installed on one side of the reduction motor 5, and the sleeve ring 3 and the reduction motor 5 are fixedly connected to the support block 21, so that the sleeve ring 3 provides a supporting force to the support block 21, and the support block 21 supports the reduction motor 5; a stator 22 is fixedly installed inside the support shell 1, and a permanent magnet rotor 23 is rotatably connected inside the stator 22, and the permanent magnet rotor 23 is connected to the support shell 1 The permanent magnet rotor 23 is rotatably connected, one end of the permanent magnet rotor 23 is fixedly connected to the transmission shaft 25, and a cooling blade 24 is fixedly connected to the outer wall of the permanent magnet rotor 23 and away from the transmission shaft 25. The cooling blade 24 is used to cool the inside of the cooling hole shell 2, so that the stator 22 is powered by the controller 39. The stator 22 can drive the permanent magnet rotor 23 to rotate, and the permanent magnet rotor 23 carries the transmission shaft 25 to rotate. The transmission shaft 25 rotates on multiple main balls 14, and the transmission shaft 25 carries the cooling blade 24 to rotate. The high-speed rotation of the cooling blade 24 can guide and discharge the internal heat of the cooling hole shell 2, and quickly realize self-cooling operation on the inner wall of the cooling hole shell 2.

[0039] In this embodiment, as shown in the attached Figure 7As shown, the switching positioning mechanism includes a switching motor 26 fixedly mounted on the other end of the rotating shaft 11; a bracket 27 is fixedly connected to the upper surface of the switching motor 26, and the bracket 27 is fixedly connected to the sleeve slider 10, and a proximity sensor 28 is fixedly mounted on one side of the inner wall of the bracket 27, and two sensing strips 29 are arranged below the proximity sensor 28, and the two sensing strips 29 are fixedly connected to the rotating shaft 11, and a gap is formed between the sensing strips 29 and the proximity sensor 28. The two sensing strips 29 are symmetrically arranged about the center point of the rotating shaft 11, and the vertical cross-section of the bracket 27 is L-shaped.

[0040] In this embodiment, as shown in the attached Figure 3 - Fig. 9 As shown, the fluctuation detection component includes a contact roller 30, a rotating rod 31, a sleeve concave rod 32, a sleeve block 33 and a rubber pad 34; the contact roller 30 is rollingly connected above the outer wall of the transmission shaft 25, the rotating rod 31 is fixedly connected to one end of the contact roller 30, the sleeve concave rod 32 is rotationally connected to the outer wall of the rotating rod 31, the contact roller 30 and the sleeve concave rod 32 are rotationally connected, the sleeve block 33 is slidably located on the outer wall of the sleeve concave rod 32, and the rubber pad 34 is fixedly connected to the top of the sleeve concave rod 32.

[0041] The fluctuation detection assembly further includes a sleeve support block 35 , a fluctuation distance sensor 36 , a fluctuation block 37 and a support frame 38 .

[0042] The socket support block 35 is fixed on the top of the rubber pad 34, the fluctuation distance sensor 36 is fixed on the inner wall of the socket support block 35, the socket support block 35 and the socket block 33 are fixedly connected, the fluctuation block 37 is fixedly connected to the outer wall of the socket recessed rod 32 and is located below the fluctuation distance sensor 36, the fluctuation distance sensor 36 is used to sense the distance of the fluctuation block 37, the support frame 38 is fixedly installed on the outer wall of the socket block 33, the bottom end of the support frame 38 is fixedly connected to the outer wall of the support ring 20, and the controller 39 is fixedly installed in front of the support shell 1.

[0043] In this embodiment, as shown in the attached Figure 1 - Figure 4 As shown, the wave block 37 is slidably connected to the sleeve support block 35, and the cross-sectional shape of the rubber pad 34 is rectangular.

[0044] The use process of the self-cooling high-speed permanent magnet motor of the present invention is as follows:

[0045] Step 1, during self-cooling drive, the bottom of the support shell 1 is installed on the platform, the support shell 1 supports the cooling hole shell 2, and the controller 39 supplies power to the stator 22. The stator 22 can drive the permanent magnet rotor 23 to rotate, and the permanent magnet rotor 23 carries the transmission shaft 25 to rotate. The transmission shaft 25 rotates on multiple main balls 14, and the main balls 14 roll inside the flip plate 12. The transmission shaft 25 can also rotate inside the cooling hole shell 2, and the transmission shaft 25 carries the cooling blades 24 to rotate. The high-speed rotation of the cooling blades 24 can guide and discharge the heat inside the cooling hole shell 2, and quickly realize the self-cooling operation of the inner wall of the cooling hole shell 2. When the transmission shaft 25 rolls on the main balls 14 and the main balls 14 are worn and missing, the transmission shaft 25 will fluctuate greatly.

[0046] Step 2: During the fluctuation detection, when the transmission shaft 25 rotates and shakes, the transmission shaft 25 will carry the contact roller 30 to move vertically upward, and the contact roller 30 can rotate with the transmission shaft 25, and the contact roller 30 drives the rotating rod 31 to rotate vertically, and the rotating rod 31 carries the sleeve concave rod 32 to fluctuate vertically, and the sleeve concave rod 32 fluctuates vertically along the inner wall of the sleeve block 33, and the sleeve concave rod 32 drives the rubber pad 34 to achieve vertical fluctuation compression, and the support ring 20 supports the support frame 38. The support frame 38 supports the sleeve block 33, and the sleeve block 33 supports the sleeve support block 35, and the sleeve support block 35 provides support force for the fluctuation distance sensor 36, and the sleeve concave rod 32 carries the fluctuation block 37 to fluctuate vertically, so that the fluctuation distance sensor 36 can achieve distance sensing for the fluctuation block 37. When the fluctuation distance sensed by the fluctuation distance sensor 36 is the same as the fluctuation replacement distance set by the controller 39, it is immediately known that the multiple main balls 14 on the outer wall of the transmission shaft 25 are worn to the extent that they need to be replaced. The stator 22 is immediately turned off through the controller 39 to stop the drive of the permanent magnet rotor 23.

[0047] Step 3: During synchronous switching, the controller 39 starts the reduction motor 5 to drive the driving gear 4 to rotate in the forward direction, and the driving gear 4 carries the rotating ring 7 to rotate counterclockwise, and the collar 3 provides support force to the support block 21, and the support block 21 supports the reduction motor 5, and the linkage gear ring 6 can carry the rotating ring 7 to rotate, and the rotating ring 7 rotates on the limit support ring 19, and the rotating ring 7 rotates on the outer wall of the support ring 20. The rotating ring 7 carries multiple rotating frames 8 to rotate counterclockwise, and the rotating frames 8 carry the limit slide bar 9 to move upward.

[0048] At the same time, the plurality of limit slide bars 9 can move away from the center point of the transmission shaft 25, the limit slide bars 9 carry the sleeve slider 10 to move upward, the sleeve slider 10 carries the rotating shaft 11 to move upward, the rotating shaft 11 carries the flip plate 12 to move upward, the flip plate 12 moves out from the inside of the collar 3, and the plurality of flip plates 12 and the collar 3 are separated. At the same time, the flip plate 12 drives the two threaded sleeves 15 to move upward, the threaded sleeves 15 carry the main ball 14 to move upward, and the other threaded sleeve 15 carries the spare ball 13 to move upward. At the same time, the sleeve slider 10 moves upward along the inner wall of the slide frame 16, and the sleeve slider 10 carries the limit ring 18 to move upward, and the limit ring 18 moves upward along the slide frame 16. When the top surface of the sleeve slider 10 contacts the bottom end of the distance sensor 17, when the sensing distance of the distance sensor 17 is zero, the reduction motor 5 is turned off through the controller 39, and at this time, the plurality of main balls 14 can move out from the inside of the collar 3.

[0049] Step 4: When switching the positioning, the controller 39 starts multiple switching motors 26, and the sleeve slider 10 supports the bracket 27, the bracket 27 supports the switching motor 26, and the bracket 27 supports the proximity sensor 28, so as to increase the stability of the proximity sensor 28. The switching motor 26 drives the rotating shaft 11 to rotate, and the rotating shaft 11 rotates inside the sleeve slider 10. The rotating shaft 11 carries the flip plate 12 to rotate 180 degrees, and the flip plate 12 carries the main ball 14 and the threaded sleeve 15 to rotate synchronously, the spare ball 13 is located at the bottom, and the main ball 14 is located at the top, so that the positions of the main ball 14 and the spare ball 13 are swapped. At the same time, the rotating shaft 11 carries two sensor bars 29 to rotate. When the sensor bar 29 at the bottom rotates to the sensing part at the bottom of the proximity sensor 28, the controller 39 turns off the switching motor 26 after the proximity sensor 28 senses, so that the multiple main balls 14 and the multiple spare balls 13 are swapped one by one.

[0050] Step 5: During reset, the controller 39 is used to start the reduction motor 5 to drive the driving gear 4 to rotate in the reverse direction. The driving gear 4 carries the rotating ring 7 to rotate clockwise, and the linkage gear ring 6 can carry the rotating ring 7 to rotate clockwise. The rotating ring 7 rotates clockwise on the limit support ring 19. The rotating ring 7 carries multiple rotating frames 8 to rotate clockwise, and the rotating frames 8 carry the limit slide bar 9 to move downward, and the limit slide bar 9 carries the sleeve slider 10 to move downward, and the sleeve slider 10 carries the rotating shaft 11 to move downward, and the rotating shaft 11 carries the flip plate 12 to move downward, and the multiple flip plates 12 can be inserted into the sleeve ring 3. At the same time, the multiple flip plates 12 can move close to the center point of the transmission shaft 25, and at the same time, the flip plate 12 drives the spare balls 13 to move toward the outer wall of the transmission shaft 25 until the multiple spare balls 13 contact the outer walls of the multiple transmission shafts 25, so that the transmission shaft 25 can continue to contact the multiple unworn spare balls 13 to achieve stable rotation drive.

[0051] Secondly, later maintenance personnel can remove the threaded sleeve 15 from the gap at the bottom of the support shell 1 through the inspection port reserved at the bottom of the support shell 1. The threaded sleeve 15 is bolted to the flip plate 12, so that after the threaded sleeve 15 is removed, a new main ball 14 can be replaced, and then the threaded sleeve 15 and the flip plate 12 can be fixed and installed with bolts.

[0052] The negative pressure fan includes a negative pressure fan casing 40 fixed on one side of the supporting casing 1, and the inner wall of the negative pressure fan casing 40 is rotatably connected with a negative pressure blade 41; the inner wall of the negative pressure blade 41 is fixedly connected to the outer wall of the transmission shaft 25, and the outer wall of the transmission shaft 25 is rotatably connected to the inner wall of the negative pressure fan casing 40.

[0053] During the use of the negative pressure fan of the present invention, when the transmission shaft 25 is driven, the transmission shaft 25 can carry the negative pressure blades 41 to rotate, and the negative pressure blades 41 rotate inside the negative pressure fan casing 40, so that the negative pressure blades 41 can generate a high-speed rotational force inside the negative pressure fan casing 40, and the air inlet of the negative pressure fan casing 40 can take in air, realize pressurization and exhaust from the air outlet of the negative pressure fan casing 40, thereby realizing negative pressure exhaust operation.

[0054] The contents not described in detail in the specification belong to the prior art known to those skilled in the art, and the model parameters of each electrical appliance are not specifically limited, and conventional equipment can be used. In this technical solution, the electrical control components not mentioned are not shown in the figure because they belong to the prior art and will not be described here.

[0055] Although the present invention has been described in detail above by general description and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made to the present invention. Therefore, these modifications or improvements made without departing from the spirit of the present invention all belong to the scope of protection claimed by the present invention.

Claims

1. A self-cooling high-speed permanent magnet motor, comprising a support shell (1), a cooling hole shell (2) and a collar (3), wherein the cooling hole shell (2) is fixed to the inner wall of the support shell (1), and the collar (3) is fixed to one side of the cooling hole shell (2), characterized in that: A synchronous switching mechanism is installed on one side of the collar (3); The synchronous switching mechanism comprises a driving gear (4) rotatably mounted on one side of the collar (3), and a reduction motor (5) is mounted on one side of the driving gear (4), an outer wall of an output end of the reduction motor (5) is fixedly connected to an inner wall of the driving gear (4), and the outer wall of the driving gear (4) is meshingly connected to a linkage gear ring (6); A rotating ring (7) is fixedly mounted on the inner wall of the linkage gear ring (6), and the rotating ring (7) and the linkage gear ring (6) are both rotatably connected to the sleeve ring (3); a plurality of rotating frames (8) are fixedly connected to the outer wall of the rotating ring (7) and located at one side of the linkage gear ring (6), and the inner wall of each rotating frame (8) is slidably connected to a limiting sliding rod (9); One end of the limiting slide bar (9) is fixedly connected to a sleeve slide block (10), the inner wall of the sleeve slide block (10) is rotatably connected to a rotating shaft (11), and one end of the rotating shaft (11) is fixedly connected to a flip plate (12), and a plurality of flip plates (12) are slidably connected to the sleeve ring (3); The other end of the rotating shaft (11) is provided with a switching positioning mechanism; The inner wall of the collar (3) is rotatably connected to a transmission shaft (25), a fluctuation detection assembly is provided above the outer wall of the transmission shaft (25), a spare ball (13) is rollingly connected to the inner wall of the cooling hole shell (2) near its top end, and a main ball (14) is rollingly connected to the inner wall of the flip plate (12) near its bottom end; One side of the backup ball (13) and the main ball (14) is rotatably connected to a threaded sleeve (15); the two threaded sleeves (15) are fixedly connected to the flip plate (12) via bolts; and the plurality of main balls (14) are rollingly connected to the transmission shaft (25).

2. The self-cooling high-speed permanent magnet motor according to claim 1, characterized in that: The plurality of rotating frames (8) are arranged in a circular ring at equal intervals, and the plurality of flip plates (12) are arranged in a circular ring at equal intervals.

3. The self-cooling high-speed permanent magnet motor according to claim 2, characterized in that: A sliding frame (16) is slidably connected to one side of the rotating shaft (11), a limiting ring (18) is connected to one side of the sliding frame (16), the limiting ring (18) and the rotating shaft (11) are both slidably connected to the sliding frame (16), and the limiting ring (18) and the rotating shaft (11) are fixedly connected; A distance sensor (17) is fixedly mounted on the top of the inner wall of one of the sliding frames (16).

4. The self-cooling high-speed permanent magnet motor according to claim 3, characterized in that: One side of the rotating ring (7) is rotatably connected to a limit support ring (19), and an inner wall of the limit support ring (19) is fixedly connected to a support ring (20), and the support ring (20) is fixedly connected to the sleeve ring (3); A support block (21) is installed on one side of the reduction motor (5), and the collar (3) and the reduction motor (5) are both fixedly connected to the support block (21); A stator (22) is fixedly mounted inside the support shell (1), a permanent magnet rotor (23) is rotatably connected inside the stator (22), the permanent magnet rotor (23) is rotatably connected to the support shell (1), one end of the permanent magnet rotor (23) is fixedly connected to a transmission shaft (25), and a cooling blade (24) is fixedly connected to the outer wall of the permanent magnet rotor (23) at a position away from the transmission shaft (25), and the cooling blade (24) is used to cool the interior of the cooling hole shell (2).

5. The self-cooling high-speed permanent magnet motor according to claim 4, characterized in that: The switching positioning mechanism comprises a switching motor (26) fixedly mounted on the other end of the rotating shaft (11); A bracket (27) is fixedly connected to the upper surface of the switching motor (26), and the bracket (27) is fixedly connected to the sleeve sliding block (10). A proximity sensor (28) is fixedly installed on one side of the inner wall of the bracket (27). Two sensing strips (29) are provided below the proximity sensor (28). Both of the two sensing strips (29) are fixedly connected to the rotating shaft (11), and a gap is formed between the sensing strip (29) and the proximity sensor (28).

6. The self-cooling high-speed permanent magnet motor according to claim 5, characterized in that: The two sensing strips (29) are arranged symmetrically about the center point of the rotating shaft (11), and the vertical cross-section of the bracket (27) is L-shaped.

7. The self-cooling high-speed permanent magnet motor according to claim 6, characterized in that: The wave detection assembly comprises a contact roller (30), a rotating rod (31), a sleeve concave rod (32), a sleeve block (33) and a rubber pad (34); The contact roller (30) is rollingly connected above the outer wall of the transmission shaft (25); the rotating rod (31) is fixedly connected to one end of the contact roller (30); the sleeve concave rod (32) is rotationally connected to the outer wall of the rotating rod (31); the contact roller (30) and the sleeve concave rod (32) are rotationally connected; the sleeve block (33) is slidably located on the outer wall of the sleeve concave rod (32); and the rubber pad (34) is fixedly connected to the top of the sleeve concave rod (32); The wave detection assembly further comprises a sleeve support block (35), a wave distance sensor (36), a wave block (37) and a support frame (38); The sleeve support block (35) is fixed on the top of the rubber pad (34); the fluctuation distance sensor (36) is fixedly located on the inner wall of the sleeve support block (35); the sleeve support block (35) is fixedly connected to the sleeve block (33); the fluctuation block (37) is fixedly connected to the outer wall of the sleeve concave rod (32) and is located below the fluctuation distance sensor (36); the fluctuation distance sensor (36) is used to sense the distance of the fluctuation block (37); the support frame (38) is fixedly installed on the outer wall of the sleeve block (33); and the bottom end of the support frame (38) is fixedly connected to the outer wall of the support ring (20); A controller (39) is fixedly mounted in front of the support shell (1).

8. The self-cooling high-speed permanent magnet motor according to claim 7, characterized in that: The wave block (37) is slidably connected to the sleeve support block (35), and the cross-sectional shape of the rubber pad (34) is rectangular.

9. A negative pressure fan, applied to the self-cooling high-speed permanent magnet motor according to claim 8, characterized in that: It comprises a negative pressure fan casing (40) fixed to one side of the supporting casing (1), wherein the inner wall of the negative pressure fan casing (40) is rotatably connected to a negative pressure blade (41); The inner wall of the negative pressure blade (41) is fixedly connected to the outer wall of the transmission shaft (25), and the outer wall of the transmission shaft (25) is rotatably connected to the inner wall of the negative pressure fan casing (40).

Images