JP2023082690A - High-speed blower motor - Google Patents

Abstract

To provide a high-speed blower motor.SOLUTION: A high-speed blower motor is equipped with a housing 1, a stator assembly 2 installed in the housing 1, and a wiring assembly 3 electrically connected with the stator assembly 2. The housing 1 is equipped with a first cylinder body 11, a second cylinder body 12 provided in the first cylinder body 11, and a plurality of first blades 13 that is installed between the first cylinder body 11 and the second cylinder body 12 and connects the first cylinder body 11 and the second cylinder body 12. The high-speed blower motor is further equipped with an integrated type rotator assembly 4 that includes a moving impeller 41, a shaft receiving housing 42, a bearing 43, a rotary 44, and a magnet 45. The moving impeller 41 is installed on one side of the bearing housing 42, and a plurality of second blades 411 is installed on an outer peripheral side of the moving impeller 41. The outer wall of the bearing housing 42 is engaged and connected with an inner wall of the second cylinder body 12, and the bearing 43 is installed in the bearing housing 42.SELECTED DRAWING: Figure 1

Description

The present invention relates to high speed blower motors.

For example, Patent Document 1 discloses a high-speed motor.

Chinese Patent Application Publication No. 111478501

As a consumer product, high speed blower motors are becoming more and more popular. High-speed motors are more technically demanding than regular motors, requiring tight control over the precision of each assembly, both in the machining of parts and in the manufacturing process. However, conventional high-speed motors have deviations in accuracy during processing and assembly, and are checked for balance only after the entire assembly is completed. If the requirements are not met, reassembly or disposal is required. , the defect rate cannot be effectively reduced.

In addition, when the high-speed axial fan rotates at high speed as a core component, it makes a lot of noise, which seriously affects the user's experience. Therefore, it is necessary to consider both high efficiency and low noise in high-speed axial fans.

In addition, the motor generates heat during operation, and the efficiency of heat transfer due to the heat conduction of the motor device itself is low, so heat accumulation occurs. Significantly shortens service life.

To solve the above problems, the present invention provides a high speed blower motor.
The present invention employs the following technical solutions.

A high-speed blower motor comprising a housing, a stator assembly installed within the housing, and a wiring assembly electrically connected to the stator assembly,
The housing is
a first cylinder, a second cylinder installed in the first cylinder, and a cylinder installed between the first cylinder and the second cylinder, the first cylinder and the second cylinder A plurality of first blades connecting the
The high-speed blower motor further comprises an integral rotor assembly including a movable impeller, a bearing housing, bearings, a rotating shaft and magnets,
The movable impeller is installed on one side of the bearing housing,
A plurality of second blades are installed on the outer peripheral side of the movable impeller,
an outer wall of the bearing housing is engaged and connected to an inner wall of the second cylindrical body;
wherein the bearing is installed within the bearing housing;
one end of the rotating shaft is connected to the movable impeller through the bearing;
The magnet is installed at the other end of the rotating shaft, and the other end of the rotating shaft extends into and engages the stator assembly.

Optionally, the inner wall of the second barrel is provided with a stepped projection that fits the outer wall of the bearing housing.

Optionally, the outer wall of the bearing housing is provided with a limit stop ring that fits over the end of the stepped projection and a limit groove for mounting the limit stop ring.

Alternatively, a plurality of through heat dissipation paths are installed on the stepped protrusion of the second barrel.

Optionally, the rotating shaft is provided with a support sleeve, the support sleeve being located between the bearing and the magnet.

Optionally, a balancing ring is installed at the magnet-side end of the rotating shaft.

Optionally, at least one of a retaining ring, a wave spring, a spacer sleeve and a wave washer are positioned within the bearing housing and between the bearing.

Optionally, a damping rubber ring is installed on the inner wall of the bearing housing, and the damping rubber ring is installed in the radial direction of the mounting position of the bearing or inward near the center of the bearing housing. .

Alternatively, the inner wall of the bearing housing is provided with a glue storage groove at a position corresponding to the mounting position of the bearing.

Optionally, said first blade and/or said second blade is in the shape of a bionic wing, having a maximum thickness ratio of 8%, a camber of 5% and a maximum camber position of 45% chord length. position.

A high-speed blower motor comprising a housing, a stator base installed within the housing, and a wiring assembly electrically connected to the stator base,
The housing is
a first cylinder, a second cylinder installed in the first cylinder, and a cylinder installed between the first cylinder and the second cylinder, the first cylinder and the second cylinder A plurality of first blades connecting the
the stator base includes a bearing housing, a support arm and a support ring;
The bearing housing is inserted into the first cylindrical body,
The bearing housing is coaxially mounted with the support ring,
one end of the plurality of support arms is connected to the bearing housing;
the other end of the support arm is connected to the support ring;
The bearing housing, the support arms and the support ring form a basket-like structure that accommodates the core.

Optionally, the inner wall of the support arm is provided with a regulating protrusion for fitting the iron core,
The support ring is provided with a plurality of rivet grooves for riveting the stator base to the core at positions corresponding to the limit grooves in the core.

Optionally, the outer wall of said support arm is provided with lugs,
one end of the lug is connected to the outer wall of the support arm;
The other end of the lug abuts against the inner wall of the housing.

The beneficial effects of the present invention are as follows: the high-speed blower motor of the present invention adopts an integral rotor assembly, and the rotor assembly outside the machine body before the whole machine is assembled. Due to the adjustment of the balance, it is possible to reduce the variation in the precision of the rotor parts of the electric machine that occurs during assembly and processing, making the rotor precision requirements higher and reducing the centrifugal force when the rotor rotates at high speed. can be done. As a result, vibration and noise of the motor can be effectively reduced. The installation of the bionic wing shape of the first blade and the second blade is characterized by high wind pressure and low noise, which can improve the user's using experience. The through heat dissipation path installed in the housing can improve the heat dissipation performance of the rotor, ensure the operation of the product, and realize the application of ventilation equipment in many fields.

FIG. 2 is a structural schematic diagram of a cross section of the present invention; It is a structural schematic diagram of the split state of the present invention. FIG. 2 is a structural schematic diagram of the housing of the present invention; FIG. 2 is a structural schematic diagram of the integrated rotor assembly of the present invention; FIG. 4 is a structural schematic diagram of the stepped protrusion, limit stop ring and limit groove of the present invention; FIG. 4 is a structural schematic diagram of a retaining ring, a wave spring, a spacer sleeve, and a buffer rubber ring installed in the bearing housing of the present invention; FIG. 4 is a structural schematic diagram of a wave spring and a spacer sleeve installed in the bearing housing of the present invention; FIG. 4 is a structural schematic diagram of a shock absorbing rubber ring installed in the bearing housing of the present invention; FIG. 4 is a structural schematic diagram of the glue storage groove in the bearing housing of the present invention; FIG. 3 is a structural schematic diagram of the first blade of the present invention; Fig. 4 is a structural schematic diagram of the second blade of the present invention; FIG. 4 is a structural schematic diagram of the post-sealing lid of the present invention; FIG. 4 is a structural schematic diagram of a divided state of Embodiment 2 of the present invention; FIG. 4 is a structural schematic diagram of a cross section of Embodiment 2 of the present invention; FIG. 4 is a structural schematic diagram of a stator assembly according to Embodiment 2 of the present invention; FIG. 4 is a structural schematic diagram of a bearing housing according to Embodiment 2 of the present invention;

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will now be further described in detail with reference to the accompanying drawings and embodiments. It should be noted that the specific embodiments described herein are used to illustrate the invention and are not limiting of the invention.
(Embodiment 1)
As shown in FIGS. 1-4, the high speed blower motor includes a housing 1, a stator assembly 2 and a wiring assembly 3. FIG. The stator assembly 2 is installed inside the housing 1 . The wiring assembly 3 is electrically connected to the stator assembly 2 .

The housing 1 includes a first cylinder 11, a second cylinder 12 installed in the first cylinder 11, and installed between the first cylinder 11 and the second cylinder 12. A plurality of first blades 13 connecting the first cylinder 11 and the second cylinder 12 are provided. An air circulation space is formed between the first cylindrical body 11 and the second cylindrical body 12 and is defined as a plurality of air passages through which airflow can pass through the first blades 13 .

The high speed blower motor further comprises an integral rotor assembly 4 . The integrated rotor assembly 4 includes a movable impeller 41 , a bearing housing 42 , bearings 43 , a rotating shaft 44 and magnets 45 . The movable impeller 41 is installed on one side of the bearing housing 42 . A plurality of second blades 411 are installed on the outer peripheral side of the movable impeller 41 . The outer wall of the bearing housing 42 is engaged with and connected to the inner wall of the second cylinder 12 . The bearing 43 is installed in the bearing housing 42 . One end of the rotating shaft 44 is connected to the movable impeller 41 through the bearing 43 . A magnet 45 is installed at the other end of the rotating shaft 44 , and the other end of the rotating shaft 44 extends into the stator assembly 2 and engages with the stator assembly 2 .

The bearing housing 42 and the inner wall of the second cylindrical body 12 may be connected by shaft hole fitting, or the bearing housing 42 may be fixed inside the second cylindrical body 12 by adhesion.

When assembling the integrated rotor assembly 4 , the bearing 43 is first installed in the bearing housing 42 , and after the magnet 45 is press-fitted to the rotating shaft 44 , the rotating shaft 44 is mounted on the movable impeller 41 through the bearing 43 . connected to Since the integrated rotor assembly 4 can be subjected to overall balance processing before being attached to the housing 1, it is easy to grasp during the balancing process, has high precision when performing balance correction, and can reduce motor vibration. Improvements have great benefits. Since the balance amount can be kept within 0.5 mg, the user cannot perceive the vibration of the motor with his/her hands, and the user can have a comfortable experience. In addition, the integral rotor assembly 4 allows the rotor to be machined and molded at one time and installed in the housing 1, thus reducing the assembly accuracy requirements of the parts, reducing the difficulty of the production process, and reducing the production cost. It can greatly improve efficiency, prevent a lot of waste caused by unstable production process, and improve the non-defective rate of products.

As shown in FIGS. 1 and 5, the bearing housing 42 is formed on the inner wall of the second cylindrical body 12 so that the second cylindrical body 12 fits well into the bearing housing 42 and also secures assembly space for other parts. A stepped projection 121 is provided to fit the outer wall of the housing. The bearing housing 42 and the second cylindrical body 12 are fixed by shaft hole fitting or adhesion. Alternatively, the outer wall of the bearing housing 42 is provided with a limit stop ring 421 fitted to the end of the stepped projection 121 and a limit groove 422 for mounting the limit stop ring 421 . The bearing housing 42 is fixed inside the second cylindrical body 12 through a limit stop ring 421 .

As shown in FIG. 3, a plurality of through heat radiation paths 122 are optionally installed on the stepped protrusion 121 of the second cylindrical body 12, so that the weight of the housing 1 is reduced and the outside air contact area is enlarged. As a result, a large heat dissipation area is formed, which improves heat dissipation efficiency, reduces heat accumulation in the blower motor, improves the operating environment of the motor bearing 43, and avoids shortening the service life due to heat generation outside the allowable range. can.

As shown in FIGS. 2 and 4, a support sleeve 46 is optionally provided on the rotating shaft 44 . The support sleeve 46 is located between the bearing 43 and the magnet 45 . By controlling the gap between the support sleeve 46 and the movable impeller 41 , a predetermined temporary tightening force can be applied to the bearing 43 to adjust the gap of the bearing 43 .

As shown in FIGS. 2 and 4, a balance ring 47 is optionally installed at the end of the rotating shaft 44 on the magnet 45 side. The balancing ring 47 is used to balance the rotor so as to keep the overall balance of the rotor assembly.

6-8, the bearing housing 42 optionally includes at least one of a retaining ring 431, a wave spring 432, a spacer sleeve 433 and a wave washer (not shown) between the bearing 43. is set up. The retaining ring 431 is used to limit the position so that the bearing 43 is fixed without loosening. The wave spring 432 corrects the radial clearance of the bearing 43 and adjusts the balance of the axial force applied to the rotor. After the position of the bearing 43 is limited by the magnet 45 and the movable impeller 41 , under the temporary tightening force of the wave spring 432 , the bearing 43 can freely adjust the clearance of the bearing 43 .

As shown in FIGS. 6 and 8, a damping rubber ring 423 is optionally installed on the inner wall of the bearing housing 42 . The buffer rubber ring 423 is installed in the radial direction of the mounting position of the bearing 43 or in the inner direction near the center of the bearing housing 42 . A damping rubber ring 423 is placed in the bearing 43 and its main purpose is to reduce the resonance noise generated by the bearing 43 during high speed operation. This noise forms metal resonance noise in contact with the air path metal, and the noise is blocked by the elasticity and material characteristics of the buffer rubber ring 423 . The next purpose is to increase the frictional force and temporary tightening force between the bearing 43 and the bearing housing 42 so that the bearing 43 can automatically adjust the axial position of the bearing 43 in the bearing housing 42 and rotate. It should have good concentricity and ensure that no additional vibrations occur when the child is running.

A wave spring 432, a wave washer, a buffer rubber ring 423, and the like are used for the temporary tightening process between the two bearings 43. FIG. Mainly the high-speed bearing 43 has different clearances for different speeds, in order to meet the operating requirements of the bearing 43 itself, reach a more perfect operating state, and finally realize the control of the running noise of the bearing 43 of the motor. need.

As shown in FIG. 9 , the inner wall of the bearing housing 42 is optionally provided with a glue storage groove 424 at a position corresponding to the mounting position of the bearing 43 . This makes the bearing 43 stronger after being bonded.

As shown in FIGS. 10 and 11, the first blade 13 and/or the second blade 411 has the shape of a bionic wing with a maximum thickness ratio of 8%, a camber of 5%, and a maximum The camber position is at 45% of the chord length. The shape of the bionic wing has a smaller lift-to-drag ratio than the shape of a conventional bionic wing. Compared with the traditional bionic wing shape, it can improve the aerodynamic efficiency with the same power and generate more wind pressure, while reducing wind resistance and avoiding noise caused by eddy currents formed by strong winds. can be done. According to actual measurements, the sound of the fan is soft and pleasant, which can bring users a better using experience.

According to simulation analysis and actual tests, the number of the first blades 13 is preferably 7-9. This can effectively improve the conversion of wind energy.

The stator assembly 2 includes a bobbin and a coil (not shown) wound on the bobbin. The wiring assembly 3 is electrically connected to the coil wound around the bobbin. When the wiring assembly 3 is energized, the coil is energized to form an electromagnetic field, and the magnet 45 on the rotating shaft 44 rotates due to the magnetic force. The shaft 44 is driven to rotate.

As shown in FIG. 12 , the high-speed blower motor further includes a post-sealing lid 5 . The post-sealing lid 5 is installed on the side of the housing 1 near the wiring assembly 3 . The post-sealing lid 5 covers all or part of the stator assembly 2 and the wiring assembly 3 within the post-sealing lid 5 . The post-sealing lid 5 is used to prevent liquid from penetrating into the interior of the motor, and a sealant can be applied to the contact area to improve the protective performance of the motor.

Beneficial effects of the present invention are as follows. The high-speed blower motor of the present invention adopts an integral rotor assembly, and balances the rotor assembly outside the machine body before assembling the whole machine, so that the electric machine trouble caused during assembly and processing is reduced. It can reduce the accuracy variation of the rotor parts, make the rotor accuracy requirements higher, and reduce the centrifugal force when the rotor rotates at high speed. As a result, vibration and noise of the motor can be effectively reduced. The installation of the bionic wing shape of the first blade and the second blade is characterized by high wind pressure and low noise, which can improve the user's using experience. The through heat dissipation path installed in the housing can improve the heat dissipation performance of the rotor, ensure the operation of the product, and realize the application of ventilation equipment in many fields.

(Embodiment 2)
As shown in FIGS. 13 to 16, the high-speed blower motor according to the second embodiment is provided with a stator base 20 instead of the bearing housing 42 of the first embodiment. Since other configurations of the high-speed blower motor are the same as those of the high-speed blower motor according to the first embodiment, the same parts are denoted by the same reference numerals, and detailed description thereof will be omitted.

Stator base 20 includes bearing housing 420 , support arms 436 and support ring 435 . The bearing housing 420 is inserted into the first cylindrical body 11 and installed coaxially with the support ring 435 . One end of the plurality of support arms 436 is connected to the bearing housing 420 and the other end of the support arms 436 is connected to the support ring 435 . Bearing housing 420 , support arm 436 and support ring 435 form a cage-like structure that accommodates core 8 . Bearing 43 is installed in bearing housing 420 .

A restricting projection 437 for fitting the iron core 8 is provided on the inner wall of the support arm 436 . The support ring 435 is provided with a plurality of rivet grooves 438 for riveting the stator base 20 to the iron core 8 at positions corresponding to the limit grooves of the iron core 8 .

A lug 434 is mounted on the outer wall of the support arm 436 . One end of the lug 434 is connected to the outer wall of the support arm 436 and the other end of the lug 434 is applied to the inner wall of the housing 1 .

The beneficial effects of Embodiment 2 of the present invention are as follows. The stator assembly 2 adopts a basket-like structure and is provided with grooves for conducting airflow, so that the iron core 8 can efficiently dissipate heat. This solves the problem of the existing motor's difficult heat dissipation, improves the airflow flow environment, forms a contraction space at the airflow exit position, reduces the formation of vortices, improves the motor efficiency, and increases the heat energy Loss can be reduced.

1 Case 2 Stator Assembly 20 Stator Base 3 Wiring Assembly 4 Integrated Rotor Assembly 5 Sealed Lid 11 First Cylinder 12 Second Cylinder 13 First Blade 41 Movable Impeller 42, 420 Bearing Housing 43 Bearing 44 Rotating shaft 45 Magnet 46 Support sleeve 47 Balance ring 121 Stepped projection 122 Through heat dissipation path 411 Second blade 421 Limit stop ring 422 Limit groove 423 Buffer rubber ring 424 Adhesive storage groove 431 Retaining ring 432 Wave spring 433 Spacer sleeve 434 Lug 435 Support Ring 436 Support Arm 437 Control Protrusion 438 Rivet Groove

Claims (13)

A high-speed blower motor comprising a housing, a stator assembly installed within the housing, and a wiring assembly electrically connected to the stator assembly,
The housing is
a first cylinder, a second cylinder installed in the first cylinder, and a cylinder installed between the first cylinder and the second cylinder, the first cylinder and the second cylinder A plurality of first blades connecting the
The high-speed blower motor further comprises an integral rotor assembly including a movable impeller, a bearing housing, bearings, a rotating shaft and magnets,
The movable impeller is installed on one side of the bearing housing,
A plurality of second blades are installed on the outer peripheral side of the movable impeller,
an outer wall of the bearing housing is engaged and connected to an inner wall of the second cylindrical body;
wherein the bearing is installed within the bearing housing;
one end of the rotating shaft is connected to the movable impeller through the bearing;
A high-speed blower motor, wherein the magnet is installed at the other end of the rotating shaft, and the other end of the rotating shaft extends into the stator assembly and engages with the stator assembly. 2. The high-speed blower motor according to claim 1, wherein the inner wall of the second cylindrical body is provided with a stepped projection that fits the outer wall of the bearing housing. 3. The outer wall of the bearing housing is provided with a limit stop ring fitted to the end of the stepped projection and a limit groove for mounting the limit stop ring. High speed blower motor. 3. The high-speed blower motor according to claim 2, wherein the stepped projection of the second cylindrical body is provided with a plurality of through heat radiation paths. The high-speed blower motor according to claim 1, wherein a support sleeve is provided on the rotating shaft, and the support sleeve is positioned between the bearing and the magnet. 2. The high-speed fan motor according to claim 1, wherein a balance ring is installed at the magnet-side end of the rotating shaft. 2. The high-speed blower motor according to claim 1, wherein at least one of a retaining ring, a wave spring, a spacer sleeve and a wave washer is installed between the bearing and the bearing housing. A buffer rubber ring is installed on the inner wall of the bearing housing,
2. The high-speed blower motor according to claim 1, wherein the shock-absorbing rubber ring is installed in the radial direction of the mounting position of the bearing or in the inner direction near the center of the bearing housing. The high-speed blower motor according to claim 1, wherein the inner wall of the bearing housing is provided with an adhesive storage groove at a position corresponding to the mounting position of the bearing. The first blade and/or the second blade has the shape of a bionic wing, has a maximum thickness ratio of 8%, a camber of 5%, and a maximum camber position at a chord length of 45%. The high-speed blower motor according to claim 1, characterized in that: A high-speed blower motor comprising a housing, a stator base installed within the housing, and a wiring assembly electrically connected to the stator base,
The housing is
a first cylinder, a second cylinder installed in the first cylinder, and a cylinder installed between the first cylinder and the second cylinder, the first cylinder and the second cylinder A plurality of first blades connecting the
the stator base includes a bearing housing, a support arm and a support ring;
The bearing housing is inserted into the first cylindrical body,
The bearing housing is coaxially mounted with the support ring,
one end of the plurality of support arms is connected to the bearing housing;
the other end of the support arm is connected to the support ring;
A high-speed blower motor, wherein the bearing housing, the support arm, and the support ring form a basket-like structure that accommodates an iron core. The inner wall of the support arm is provided with a regulating protrusion for fitting the iron core,
The support ring according to claim 11, wherein a plurality of rivet grooves for riveting the stator base to the core are installed at positions corresponding to limit grooves in the core. High speed blower motor. The outer wall of said support arm is provided with a lug,
one end of the lug is connected to the outer wall of the support arm;
The high-speed blower motor according to claim 11 or 12, wherein the other end of said lug is in contact with the inner wall of said housing.

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