CN113162271A - Permanent magnet brushless motor capable of bearing ultrahigh acceleration impact - Google Patents
Permanent magnet brushless motor capable of bearing ultrahigh acceleration impact Download PDFInfo
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- CN113162271A CN113162271A CN202110367699.5A CN202110367699A CN113162271A CN 113162271 A CN113162271 A CN 113162271A CN 202110367699 A CN202110367699 A CN 202110367699A CN 113162271 A CN113162271 A CN 113162271A
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- bearing
- permanent magnet
- rotating shaft
- right end
- sleeve
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
- H02K5/167—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using sliding-contact or spherical cap bearings
- H02K5/1672—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using sliding-contact or spherical cap bearings radially supporting the rotary shaft at both ends of the rotor
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/003—Couplings; Details of shafts
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/08—Structural association with bearings
- H02K7/083—Structural association with bearings radially supporting the rotary shaft at both ends of the rotor
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Frames (AREA)
Abstract
The invention discloses a permanent magnet brushless motor capable of bearing ultrahigh acceleration impact, which comprises a stator assembly, a rotor assembly and a composite bearing assembly, wherein the stator assembly comprises a shell and an electromagnetic coil, the shell comprises a machine shell, a left end cover and a right end cover, the rotor assembly comprises a rotating shaft, a permanent magnet, an end surface shaft sleeve A and an end surface shaft sleeve B, the composite bearing assembly comprises an auxiliary bearing, a left bearing, a right bearing, a first return spring and a second return spring, the inner wall of the shell is provided with a limiting step to bear the leftward impact of the rotor assembly, and the right end cover can be contacted with the right end of the rotating shaft to bear the rightward impact of the rotor assembly when the rotor assembly integrally moves rightwards. The invention can bear the impact of ultrahigh radial acceleration, disperse the impact force towards the left end to act on the shell and the end face shaft sleeve, disperse the impact force towards the right end to act on the rotating shaft and the right end cover, and avoid the phenomenon of crushing caused by concentrated impact force acting on a small area of the end face of the sliding bearing.
Description
Technical Field
The invention belongs to the technical field of permanent magnet motors, and particularly relates to a permanent magnet brushless motor capable of bearing ultrahigh acceleration impact.
Background
Permanent magnet motors are widely used in the military industry for a number of advantages. With the continuous development of the national defense industry, the requirements on the reliability of the permanent magnet motor such as high and low temperature resistance, impact resistance, corrosion resistance, interference resistance, light weight and the like are continuously improved. As a core component of power, the demand for high reliability of permanent magnet motors is increasingly pressing. Taking a permanent magnet motor with ultrahigh impact acceleration resistance (radial 6000G and axial 15000G or above) as an example, the rotor structure and the bearing support system of the conventional permanent magnet motor can be decomposed, deformed and broken, which results in complete scrapping of the power actuator.
In the military industry, the characteristics of ultra-high acceleration scenes with missiles as objects are as follows: 1. under the large acceleration of the launching stage or the maneuvering orbital transfer stage, all parts need to bear impact, and part of actuating mechanisms keep normal work while bearing the impact of the acceleration; 2. the ultrahigh acceleration usually occurs at the moment of impacting a target, and a missile can be detonated after being drilled into the target to a certain depth, so that a related actuating mechanism can maintain a normal state before the target is detonated at the moment of impacting the target; 3. the missile flies in the atmosphere and requires light weight and small volume of each part. As one of the power execution components in the missile, the biggest obstacle caused by the ultra-high acceleration impact to the permanent magnet motor comes from the bearing support system, and the main technical difficulties are as follows: 1. ultra-high radial and axial acceleration impact can be fatal threats to ball/cylindrical roller bearings and the like, while high-strength sliding bearings can bear high radial acceleration, but the inherent axial float gap and bearing end face support structure can cause the bearing end face or the support structure end face to be crushed under the impact of the ultra-high axial acceleration, and cannot be well separated from contact to cause subsequent starting failure.
In the existing motor structure, a shaft sleeve and a friction gasket are arranged between a sliding bearing and a rotor assembly, an inherent gap (a gapless state can lead the motor to be incapable of starting and operating) exists between the friction gasket and the end face of the sliding bearing in normal work, the rotating rotor assembly intermittently moves left and right between the two sliding bearings, the wear-resistant gasket is usually made of graphite and nylon materials, so that friction loss is reduced, therefore, under the action of ultrahigh axial impact, the traditional sliding bearing mounting structure has extremely high risk, and the bearing is usually expressed as crushing of the end face of the sliding bearing, damage and deformation of the friction gasket and the shaft sleeve.
Disclosure of Invention
Aiming at the defects or the improvement requirements of the prior art, the invention provides the permanent magnet brushless motor capable of bearing ultrahigh acceleration impact, the sliding bearing support and the auxiliary bearing support structure are utilized to effectively bear the high-strength radial and axial acceleration impact action, and the return spring can enable the rotor assembly to quickly rebound to the initial position after the rotating shaft bears the axial acceleration impact action, so that the subsequent normal starting work of the rotor assembly is realized.
To achieve the above objects, according to one aspect of the present invention, there is provided a permanent magnet brushless motor capable of enduring ultra high acceleration shock, characterized by comprising a stator assembly, a rotor assembly, and a composite bearing assembly, wherein,
the stator assembly comprises a shell and an electromagnetic coil, the shell comprises a machine shell, a left end cover and a right end cover, the left end cover and the right end cover are respectively installed at the left end and the right end of the machine shell, the electromagnetic coil is fixedly installed on the inner wall of the machine shell, and a positioning boss is arranged on the inner wall of the machine shell;
the rotor assembly comprises a rotating shaft, a permanent magnet, an end face shaft sleeve A and an end face shaft sleeve B, the permanent magnet is fixedly arranged on a shaft shoulder of the rotating shaft in a penetrating mode, and the end face shaft sleeve A and the end face shaft sleeve B are respectively fixedly arranged on the rotating shaft in a penetrating mode and are respectively abutted to the left end and the right end of the shaft shoulder;
the composite bearing assembly comprises an auxiliary bearing, a left bearing, a right bearing, a first return spring and a second return spring, wherein the auxiliary bearing, the left bearing and the right bearing are sequentially sleeved on the inner wall of the shell from left to right and are all arranged on the rotating shaft in a penetrating manner, the auxiliary bearing is a rolling bearing, an inner ring of the auxiliary bearing is in interference fit with the rotating shaft, a fit clearance is formed between an outer ring and the inner wall of the shell, so that the auxiliary bearing and the rotor assembly can move relative to the shell, the left bearing and the right bearing are sliding bearings, the left end of the first return spring abuts against a left end cover, the right end of the first return spring abuts against an outer ring of the auxiliary bearing, and the left end of the second return spring abuts against an outer ring of the auxiliary bearing and the right end of the second return spring abuts against the positioning boss;
the inner wall of the shell is provided with a limiting step so as to contact with the end face shaft sleeve A when the rotor assembly moves leftwards integrally to bear leftward impact of the rotor assembly, and the right end cover can contact with the right end of the rotating shaft when the rotor assembly moves rightwards integrally to bear rightward impact of the rotor assembly.
Preferably, the rotor subassembly still includes radial rotor cover, end face shaft sleeve A and end face shaft sleeve B all fixed suit are in on the inner wall of radial rotor cover, and radial rotor cover with at least one kind in interference fit, laser welding, the riveting is adopted to joint A of end face shaft sleeve A to realize the rigid coupling, radial rotor cover with at least one kind in interference fit, laser welding, the riveting is adopted to joint B of end face shaft sleeve B to realize the rigid coupling, radial rotor cover will the permanent magnet compresses tightly in the pivot, the left and right end of permanent magnet respectively with end face shaft sleeve A with end face shaft sleeve B butt.
Preferably, the joint C of the end face shaft sleeve A and the rotating shaft is fixedly connected in a mode of combining interference fit and laser welding, and the joint D of the end face shaft sleeve B and the rotating shaft is fixedly connected in a mode of combining interference fit and laser welding.
Preferably, the first return spring is a counter-top wave spring or a multi-layer superposed wave spring;
and/or the presence of a gas in the gas,
the second return spring is a butting wave spring or a multi-layer superposed wave spring.
Preferably, the outer edge of the cross section of the shaft shoulder is an even number regular polygon, the inner edge of the cross section of the permanent magnet is correspondingly an even number regular polygon, and the outer wall of the permanent magnet is a cylindrical surface.
Preferably, the fit clearance between the outer ring of the auxiliary bearing and the inner wall of the shell is 0.05-0.12 mm.
Preferably, the pin A is wedged into the shell and the left end cover, and the joint of the pin A and the shell is reinforced by laser welding respectively;
and/or the presence of a gas in the gas,
the pin B is wedged into the machine shell and the right end cover, and the joint of the pin B and the machine shell is reinforced by laser welding respectively.
Preferably, the left end of the left bearing abuts against the positioning boss, and the right end of the right bearing abuts against the right end cover.
Preferably, the stator assembly further comprises a washer located between the electromagnetic coil and the circuit board;
and/or the presence of a gas in the gas,
the stator assembly further comprises a rubber mat, and the rubber mat is located between the right end cover and the circuit board.
Preferably, the left bearing, the right bearing and the rotating shaft are made of high-strength corrosion-resistant materials, and the high-strength corrosion-resistant materials are tungsten steel or ceramic.
In general, compared with the prior art, the above technical solution contemplated by the present invention can achieve the following beneficial effects:
1) according to the permanent magnet brushless motor capable of bearing ultrahigh acceleration impact, when the rotor assembly bears ultrahigh axial acceleration impact, the impact force towards the left end is dispersed and acted on the shell and the end surface shaft sleeve A, and the impact force towards the right end is dispersed and acted on the rotating shaft and the right end cover, so that the phenomenon of crushing caused by concentrated impact force on a small area of the end surface of the sliding bearing is avoided.
2) According to the permanent magnet brushless motor capable of bearing ultrahigh acceleration impact, the composite bearing assembly adopts the combination of the sliding bearing, the auxiliary bearing and the return spring, so that the rotor assembly can quickly return to the initial position after the permanent magnet brushless motor is subjected to ultrahigh acceleration impact, the normal starting of the permanent magnet brushless motor and the stable output performance of the permanent magnet brushless motor are facilitated, in addition, the end face of the sliding bearing is not provided with a gasket and is in intermittent scraping contact during normal work, and the loss current and the fluctuation of the motor performance are reduced.
3) According to the permanent magnet brushless motor capable of bearing ultrahigh acceleration impact, the impact stability of the rotor assembly is ensured by the measures of laser welding, interference fit or riveting and the like of the rotor assembly. In addition, the permanent magnet is fixed on the rotating shaft without directly adhering to the rotating shaft by the traditional adhering process, but is fixed on the rotating shaft by matching the end surface shaft sleeve A, the end surface shaft sleeve B and the radial rotor sleeve, so that the sliding is avoided under the condition of ultrahigh impact acceleration.
4) The composite bearing assembly adopts a high-strength corrosion-resistant sliding bearing and a rotating shaft, and can bear ultrahigh radial acceleration impact.
Drawings
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a cross-sectional view of the present invention;
FIG. 3 is a cross-sectional view of a rotor assembly of the present invention;
fig. 4 is an exploded view of the rotor assembly of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
As shown in fig. 1 to 4, a permanent magnet brushless motor capable of enduring ultra-high acceleration shock includes a stator assembly 1, a rotor assembly 2, and a composite bearing assembly, and,
the stator assembly 1 comprises a shell 11, an electromagnetic coil 12, a gasket 13, a rubber mat 14, a circuit board 15 and an electronic wire 16, wherein the shell 11 comprises a casing 111, a left end cover 112 and a right end cover 113, the left end cover 112 and the right end cover 113 are respectively installed at the left end and the right end of the casing 111, the electromagnetic coil 12 is fixedly installed on the inner wall of the casing 111, the electromagnetic coil 12 comprises a stator and a winding wound on the stator, the inner wall of the casing 111 is provided with a positioning boss 1111, and the positioning boss 1111 is preferably annular; the gasket 13 is located between the electromagnetic coil 12 and the circuit board 15, and the rubber pad 14 is located between the right end cap 113 and the circuit board 15. The electromagnetic coil 12 is connected to the circuit board 15, and one end of the electronic wire 16 is connected to the circuit board 15 and the other end is exposed out of the housing 11.
The middle parts of the end face shaft sleeve A23 and the end face shaft sleeve B24 are both of inner round hole structures matched with the rotating shaft 21, the joint C213 of the end face shaft sleeve A23 and the rotating shaft 21 is fixedly connected in a mode of combining interference fit and laser welding, and the joint D214 of the end face shaft sleeve B24 and the rotating shaft 21 is fixedly connected in a mode of combining interference fit and laser welding, so that sufficient connection strength is achieved. The end surface bush a23 and the end surface bush B24 abut against the left end and the right end of the shoulder 210 of the rotary shaft 21, respectively, and the abutment surface at the left end forms a support surface C217 and the abutment surface at the right end forms a support surface D218.
The composite bearing assembly comprises an auxiliary bearing 31, a left bearing 32, a right bearing 33, a first return spring 34 and a second return spring 35, wherein the auxiliary bearing 31, the left bearing 32 and the right bearing 33 are sequentially sleeved on the inner wall of the shell 11 from left to right and are all installed on the rotating shaft 21 in a penetrating manner, the auxiliary bearing 31 is a rolling bearing, such as a deep groove ball bearing, the inner ring of the auxiliary bearing 31 is in interference fit with the rotating shaft 21, a fit clearance is formed between the outer ring and the inner wall of the shell 11, so that the auxiliary bearing 31 and the rotor assembly 2 can move relative to the shell 11, and the fit clearance is 0.05 mm-0.12 mm, and thus the auxiliary bearing 31 can be guaranteed to move back and forth from left to right without having violent friction with the inner wall of the bearing chamber. Left bearing 32 and right bearing 33 are the slide bearing, first return spring 34 is preferably to top wave spring or the superimposed wave spring of multilayer, the left end of first return spring 34 supports on left end lid 112 and the right-hand member supports on auxiliary bearing 31's outer lane, second return spring 35 is preferably to top wave spring or the superimposed wave spring of multilayer, the left end of second return spring 35 supports on auxiliary bearing 31's outer lane and the right-hand member supports on the location boss 1111, first return spring 34 and second return spring 35 all are used for the return after auxiliary bearing 31 removes, the left end of left bearing 32 supports on location boss 1111, the right-hand member of right bearing 33 supports on right end lid 113.
The inner wall of the housing 11 has a limiting step 1112, so as to contact with the end surface shaft sleeve a23 when the rotor assembly 2 moves leftwards integrally, thereby bearing the impact of the rotor assembly 2 leftwards, the limiting step 1112 is preferably annular, the contact area between the limiting step 1112 and the end surface shaft sleeve a23 is large enough as possible, so that the contact stress can be reduced, the end surface shaft sleeve a23 of the rotor assembly 2 contacts with the limiting step 1112 and cannot collide with the left bearing 32, so that the left bearing 32 cannot be crushed, the right end cover 113 can contact with the right end of the rotating shaft 21 when the rotor assembly 2 moves rightwards integrally, thereby bearing the impact of the rotor assembly 2 rightwards, the contact area between the right end cover 113 and the right end of the rotating shaft 21 should be ensured to be large enough, so that the contact stress can be reduced. When the rotor assembly 2 moves rightward, the head sleeve B24 hits the right bearing 33 without contacting the right bearing 33, and therefore the right bearing 33 is not damaged. That is, the present invention mainly depends on the housing 11, especially the casing 111 and the right end cap 113 of the housing 11 to respectively bear the ultrahigh acceleration impact of the rotor assembly 2 to the left and to the right, rather than relying on a small area of the sliding bearing end surface to bear the impact as in the prior art, as long as the mechanical properties of the casing 111 and the right end cap 113 are good enough and the contact area is large enough, the contact stress can be small, and the impact of the rotor assembly 2 can be borne.
The working principle of the composite bearing assembly is as follows: the left bearing 32 and the right bearing 33 in the composite bearing assembly are both made of high-strength and corrosion-resistant materials, such as tungsten steel, ceramic and the like, the inner diameter and the outer diameter of the left bearing 32 and the outer diameter of the right bearing 33 are polished by adopting a finish grinding process, high dimensional accuracy and high smoothness can be obtained, and the high-precision rotary motion of the rotor assembly 2 can be supported by matching with the rotating shaft 21 made of the high-strength and corrosion-resistant materials. The auxiliary bearing 31 is located at the joint of the casing 111 and the left end cover 112, i.e. one part of the auxiliary bearing 31 is mounted on the inner wall of the left end cover 112 and the other part is mounted on the inner wall of the casing 111. In addition, the housing 111 is also made of a high-strength and corrosion-resistant material.
In the initial state, the first return spring 34 and the second return spring 35 are in the same compression state when no overload impact is caused, the elastic force at this time is moderate, under the elastic force action of the first return spring 34 and the second return spring 35, the rotor assembly 2 as a whole (the rotating shaft 21, the permanent magnet 22, the end surface shaft sleeve a23, the end surface shaft sleeve B24 and the radial rotor sleeve 25 which are fixedly connected together) cannot move left and right by a large margin, a gap a exists between the end surface shaft sleeve a23 and the limit step 1112, and a gap B exists between the right end of the rotating shaft 21 and the right end cover 113, at this time, the permanent magnet brushless motor can normally work, and there is no need to worry about scraping of the end surface of the rotor assembly 2 and other fixed structural parts.
When the rotor assembly 2 of the permanent magnet brushless motor bears ultrahigh axial acceleration to the left, the whole rotor assembly 2 moves towards the left, the end surface shaft sleeve a23 is in contact with the supporting surface a215 of the limiting step 1112 on the left, the contact area of the end surface shaft sleeve a23 is far larger than the end surface area of a friction gasket and a sliding bearing of the existing structure, therefore, the contact stress is small, after the end surface shaft sleeve a23 is stressed, a part of the end surface shaft sleeve a is transmitted to the inner side to act on the corresponding supporting surface C217 of the rotating shaft 21, and the other part of the end surface shaft sleeve a23 is transmitted to the joint D214 and the supporting surface D218 through the radial rotor sleeve 25 and the end surface shaft sleeve B24, the pressure on the permanent magnet 22 in the whole process is very small, and the risk of extrusion and fracture of the brittle permanent magnet 22 is avoided. Meanwhile, due to the matching gap between the outer ring of the auxiliary bearing 31 and the housing 11, under the impact action, the auxiliary bearing 31 can be driven by the rotating shaft 21 to move leftward to further compress the first return spring 34, while the compression amount of the second return spring 35 becomes smaller, and as the impact acceleration disappears, the first return spring 34 and the second return spring 35 return to the initial state, and also push the auxiliary bearing 31 to return to the initial position.
When the rotor assembly 2 of the permanent magnet brushless motor bears the ultrahigh axial acceleration in the rightward direction, the rotor assembly 2 moves in the rightward direction as a whole, the right end face of the rotating shaft 21 is in contact with the corresponding supporting face B216 on the right end cover 113, based on the high strength of the rotating shaft 21 and the firmness of the assembly of the right end cover 113, the axial impact force cannot cause the rotating shaft 21 to break or deform, the right end cover 113 cannot break down or fall, the stress conditions of the components of the rotor assembly 2 are similar to those described above, and the description is omitted here.
After the permanent magnet brushless motor is integrally assembled, in order to further meet the structural strength requirement, a plurality of pins a1121 and B1131 are wedged at two ends of the outer cylindrical surface of the housing 111 along the radial direction. The pin a1121 penetrates the left end cover 112 of the housing 111 in this order, and the pin B1131 penetrates the housing 111 and the right end cover 113 in this order, and in order to further prevent the pin a1121 and the pin B1131 from dropping, the joint between the pin a1121 and the pin B1131 and the housing 111 may be reinforced by laser welding.
According to the whole motor scheme, the strength of materials, the connection strength of parts and the structural firmness are fully considered, and the effect of bearing ultrahigh radial and axial acceleration impact is achieved through the designed composite bearing assembly.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A permanent magnet brushless motor capable of bearing ultrahigh acceleration impact is characterized by comprising a stator assembly, a rotor assembly and a composite bearing assembly, wherein,
the stator assembly comprises a shell and an electromagnetic coil, the shell comprises a machine shell, a left end cover and a right end cover, the left end cover and the right end cover are respectively installed at the left end and the right end of the machine shell, the electromagnetic coil is fixedly installed on the inner wall of the machine shell, and a positioning boss is arranged on the inner wall of the machine shell;
the rotor assembly comprises a rotating shaft, a permanent magnet, an end face shaft sleeve A and an end face shaft sleeve B, the permanent magnet is fixedly arranged on a shaft shoulder of the rotating shaft in a penetrating mode, and the end face shaft sleeve A and the end face shaft sleeve B are respectively fixedly arranged on the rotating shaft in a penetrating mode and are respectively abutted to the left end and the right end of the shaft shoulder;
the composite bearing assembly comprises an auxiliary bearing, a left bearing, a right bearing, a first return spring and a second return spring, wherein the auxiliary bearing, the left bearing and the right bearing are sequentially sleeved on the inner wall of the shell from left to right and are all arranged on the rotating shaft in a penetrating manner, the auxiliary bearing is a rolling bearing, an inner ring of the auxiliary bearing is in interference fit with the rotating shaft, a fit clearance is formed between an outer ring and the inner wall of the shell, so that the auxiliary bearing and the rotor assembly can move relative to the shell, the left bearing and the right bearing are sliding bearings, the left end of the first return spring abuts against a left end cover, the right end of the first return spring abuts against an outer ring of the auxiliary bearing, and the left end of the second return spring abuts against an outer ring of the auxiliary bearing and the right end of the second return spring abuts against the positioning boss;
the inner wall of the shell is provided with a limiting step so as to contact with the end face shaft sleeve A when the rotor assembly moves leftwards integrally to bear leftward impact of the rotor assembly, and the right end cover can contact with the right end of the rotating shaft when the rotor assembly moves rightwards integrally to bear rightward impact of the rotor assembly.
2. The brushless permanent magnet motor according to claim 1, wherein the rotor assembly further comprises a radial rotor sleeve, the end surface shaft sleeve a and the end surface shaft sleeve B are fixedly sleeved on an inner wall of the radial rotor sleeve, a joint a between the radial rotor sleeve and the end surface shaft sleeve a is fixedly connected by at least one of interference fit, laser welding and riveting, a joint B between the radial rotor sleeve and the end surface shaft sleeve B is fixedly connected by at least one of interference fit, laser welding and riveting, the radial rotor sleeve compresses the permanent magnet on the rotating shaft, and left and right ends of the permanent magnet are respectively abutted against the end surface shaft sleeve a and the end surface shaft sleeve B.
3. The brushless permanent magnet motor according to claim 1, wherein the joint C between the end surface sleeve a and the rotating shaft is fixedly connected by interference fit and laser welding, and the joint D between the end surface sleeve B and the rotating shaft is fixedly connected by interference fit and laser welding.
4. The brushless permanent magnet motor according to claim 1, wherein the first return spring is a counter wave spring or a multi-layer stacked wave spring;
and/or the presence of a gas in the gas,
the second return spring is a butting wave spring or a multi-layer superposed wave spring.
5. The brushless permanent magnet motor according to claim 1, wherein the shoulder has an even regular polygon on the outer edge of the cross section, the permanent magnet has an even regular polygon on the inner edge of the cross section, and the outer wall of the permanent magnet is a cylindrical surface.
6. The brushless permanent magnet motor according to claim 1, wherein the fitting clearance between the outer ring of the auxiliary bearing and the inner wall of the housing is 0.05mm to 0.12 mm.
7. The brushless permanent magnet motor capable of bearing ultrahigh acceleration impact according to claim 1, wherein the pin a is wedged into the casing and the left end cover, and the joint of the pin a and the casing is reinforced by laser welding;
and/or the presence of a gas in the gas,
the pin B is wedged into the machine shell and the right end cover, and the joint of the pin B and the machine shell is reinforced by laser welding respectively.
8. The brushless permanent magnet motor according to claim 1, wherein the left end of the left bearing abuts against the positioning boss, and the right end of the right bearing abuts against the right end cap.
9. The brushless permanent magnet motor according to claim 1, wherein the stator assembly further comprises a washer, the washer being located between the electromagnetic coil and the circuit board;
and/or the presence of a gas in the gas,
the stator assembly further comprises a rubber mat, and the rubber mat is located between the right end cover and the circuit board.
10. The brushless permanent magnet motor according to claim 1, wherein the left bearing, the right bearing, and the rotating shaft are made of high-strength corrosion-resistant material, and the high-strength corrosion-resistant material is tungsten steel or ceramic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110367699.5A CN113162271A (en) | 2021-04-06 | 2021-04-06 | Permanent magnet brushless motor capable of bearing ultrahigh acceleration impact |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110367699.5A CN113162271A (en) | 2021-04-06 | 2021-04-06 | Permanent magnet brushless motor capable of bearing ultrahigh acceleration impact |
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| Publication Number | Publication Date |
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| CN113162271A true CN113162271A (en) | 2021-07-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110367699.5A Pending CN113162271A (en) | 2021-04-06 | 2021-04-06 | Permanent magnet brushless motor capable of bearing ultrahigh acceleration impact |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114301195A (en) * | 2021-12-30 | 2022-04-08 | 贵阳万江航空机电有限公司 | Brushless motor stator, brushless motor stator fixing method and brushless motor |
| CN116131563A (en) * | 2023-01-31 | 2023-05-16 | 张勇 | Ultrahigh-speed permanent magnet magnetic suspension motor resisting unilateral shaft thrust and design method |
-
2021
- 2021-04-06 CN CN202110367699.5A patent/CN113162271A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114301195A (en) * | 2021-12-30 | 2022-04-08 | 贵阳万江航空机电有限公司 | Brushless motor stator, brushless motor stator fixing method and brushless motor |
| CN116131563A (en) * | 2023-01-31 | 2023-05-16 | 张勇 | Ultrahigh-speed permanent magnet magnetic suspension motor resisting unilateral shaft thrust and design method |
| CN116131563B (en) * | 2023-01-31 | 2024-04-02 | 张勇 | Ultrahigh-speed permanent magnet magnetic suspension motor resisting unilateral shaft thrust and design method |
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