Motor and wind driven generator

Abstract

The utility model relates to a motor and a wind driven generator. The motor comprises a host assembly and a fan. The main machine assembly comprises a machine shell assembly and a motor shaft, the motor shaft comprises an anti-corrosion section, and the anti-corrosion section penetrates through the machine shell assembly. The fan is in transmission connection with the anticorrosion section. The motor is provided with the coaxially-driven fan, the fan is driven by the original power to form cooling air, forced air cooling is performed on the internal host assembly, the heat dissipation efficiency is improved, and the power density of the motor is further improved. And under the same output power, the number of required motor sections is smaller, the size is small, and the cost is better. Meanwhile, the motor shaft penetrates through the machine shell assembly through the anti-corrosion section to be connected with the fan, so that even if part of the motor shaft is exposed in the air, stable work can be maintained.

Description

Technical Field

[0001] The present application relates to the technical field of wind power generation, and in particular to a motor and a wind power generator. Background Art

[0002] With the advancement of "carbon neutrality", thermal power generation will be gradually replaced, and wind power generation will become one of the main power generation sources in the future without pollution and carbon emissions. The wind blade variable pitch motor is an important component of the wind turbine generator set. It mainly plays the role of adjusting the input power of the wind wheel and the pneumatic brake, and plays a very important role in the safe and stable operation of the wind turbine. When the wind turbine variable pitch motor is working, its motor will generate heat. If the heat cannot be discharged in time and the temperature rises, the output power density of the motor will be reduced.

[0003] In the related art, since the blades of wind turbines are far from the ground and difficult to maintain, it is not suitable to adopt the air cooling method of external power supply. Therefore, the cooling of wind turbine variable pitch motors mainly depends on natural air cooling. However, the efficiency of natural air cooling is limited and cannot fully meet the cooling needs. Utility Model Content

[0004] Based on this, it is necessary to provide a motor and a wind turbine generator that can improve heat dissipation efficiency in order to solve the above problems.

[0005] A motor, comprising:

[0006] A main engine assembly, including a housing assembly and a motor shaft, wherein the motor shaft includes an anti-corrosion section, and the anti-corrosion section is disposed through the housing assembly; and

[0007] The fan is transmission-connected to the anti-corrosion section.

[0008] In one of the embodiments, the surface of the anti-corrosion section has a first anti-corrosion layer.

[0009] In one of the embodiments, the motor further comprises a seal, wherein the seal forms a dynamic seal between the anti-corrosion section and the housing assembly.

[0010] In one embodiment, the motor further comprises a sleeve, which is sleeved on the anti-corrosion section and forms a clearance fit with the anti-corrosion section. The sleeve and the anti-corrosion section are jointly passed through the casing assembly, and the seal forms the dynamic seal between the sleeve and the casing assembly.

[0011] In one of the embodiments, the anti-corrosion section has a fixing structure protruding in the radial direction; the motor further comprises a fixing member, which is arranged at an end of the sleeve away from the fixing structure and is used to fix the sleeve tightly toward the fixing structure.

[0012] In one embodiment, the surface of the fixing member has a second anti-corrosion layer;

[0013] And / or, the fixing member is a nut, and the anti-corrosion section has a thread matching the nut.

[0014] In one embodiment, the sealing component includes lubricating grease and an oil seal, the lubricating grease is filled between the sleeve and the housing assembly, and the oil seal is used to seal the lubricating grease.

[0015] In one of the embodiments, the motor shaft includes a main shaft section and a secondary shaft section, the secondary shaft section includes the anti-corrosion section, and is drivingly connected to the main shaft section.

[0016] In one embodiment, one end of each of the main shaft segment and the auxiliary shaft segment is connected by end nesting and interference fit.

[0017] In one embodiment, the motor further includes a heavy-loaded aviation plug, a circuit and a sealing gasket. The housing assembly has a wire passing hole. The circuit passes through the wire passing hole and is connected to the heavy-loaded aviation plug. The sealing gasket is used to seal the wire passing hole.

[0018] In one of the embodiments, the motor further includes a brake housing, which is at least partially located in the direction of the fan and is sleeved outside the casing assembly, and is spaced from the surface of the casing assembly to form a flow gap.

[0019] A wind turbine generator comprises the above-mentioned motor.

[0020] The above-mentioned motor and wind turbine have a coaxially driven fan, which uses the original power to drive the fan to form cooling air, and performs forced air cooling on the host components, thereby improving its heat dissipation efficiency and thus improving the power density of the motor. For the same output power, fewer motor segments are required, which is smaller in size and more cost-effective. At the same time, the motor shaft passes through the casing component through the anti-corrosion segment to connect to the fan, so that it can maintain stable operation even if it is partially exposed to the air. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] FIG1 is a schematic diagram of the cross-sectional structure of a motor in one embodiment of the present application.

[0023] FIG. 2 is an enlarged structural schematic diagram of the motor shown in FIG. 1 at point A. FIG.

[0024] FIG. 3 is a schematic diagram of the structure of a motor shaft in the motor shown in FIG. 1 .

[0025] FIG. 4 is a schematic diagram of the cross-sectional structure of the motor shaft shown in FIG. 3 .

[0026] Explanation of the reference numerals: 100, motor; 10, main engine assembly; 11, housing assembly; 111, main housing; 1111, lifting ring; 112, front cover; 113, rear cover; 115, rear cover; 12, motor shaft; 121, anti-corrosion section; 1211, fixing structure; 1213, concave end; 123, main shaft section; 1231, convex end; 13, stator; 14, rotor; 15, bearing; 16, rotary transformer assembly; 17, brake; 18, brake seat; 30, air cooling assembly; 31, fan; 33, fan rear cover; 40, brake housing; 41, current gap; 50, seal; 60, cylinder sleeve; 70, fixing piece; 80, heavy-load aviation plug; 90, sealing gasket. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0028] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0029] In addition, if the term "and / or" appears, "and / or" is merely a description of the association relationship of associated objects, indicating that three relationships may exist, for example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the objects associated before and after are in an "or" relationship. If the terms "first" and "second" appear, these terms are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "multiple" appears, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0030] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0031] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0032] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0033] Referring to Figures 1 to 4, a motor 100 provided in an embodiment of the present application includes a main unit assembly 10 and a fan 31. The main unit assembly 10 includes a housing assembly 11 and a motor shaft 12. The motor shaft 12 includes an anti-corrosion section 121, and the anti-corrosion section 121 is disposed through the housing assembly 11. The fan 31 is connected to the anti-corrosion section 121 in a transmission manner.

[0034] To achieve its normal function, the main assembly 10 of the motor 100 also includes conventional structures such as a stator 13, a rotor 14, a winding, a bearing 15, a rotary transformer assembly 16, a brake 17, and a brake seat 18, which are arranged in the housing assembly 11. In one embodiment, the motor 100 can be used as a variable pitch motor, and its main assembly 10 is used to achieve its variable pitch function. The housing assembly 11 may include conventional structures such as a main housing 111, a front cover 112, a rear cover 113, and a rear cover 115, and the main housing 111 has a lifting ring 1111. Among them, the front cover 112 and the rear cover 113 are respectively arranged at the front and rear ends of the main housing 111, and together form a motor cavity, and the stator 13, the rotor 14, the winding, and the bearing 15 are arranged in the motor cavity. The brake seat 18 can be arranged at the rear end of the main housing 111, and together with the rear cover 113 and the rear cover 115, form a brake cavity, and the brake 17 is arranged in the brake cavity. The front end of the motor shaft 12 passes through the front end cover 112 , and the rear end of the motor shaft 12 passes through the rear end cover 113 and the rear cover 115 in sequence.

[0035] It can be understood that the fan 31 is used to realize air cooling of the host assembly 10. In addition, the motor 100 may also include a fan rear cover 33 with an air inlet grille and other structures, which together with the fan 31 form an air cooling assembly 30. Among them, the fan rear cover 33 is used to protect the fan 31. The fan 31 can be sleeved on the anti-corrosion section 121, and can be positioned by a retaining spring in the axial direction, and can be prevented from rotating relative to the anti-corrosion section 121 in the circumferential direction by the cooperation of the metal insert and the anti-corrosion section 121.

[0036] The motor shaft 12 is used to output power, and its anti-corrosion section 121 corresponds to at least one of its tail end and front end, and the other of the tail end and front end is the main output end of the motor 100, which is used to output power to the outside and perform pitch operation. For ease of understanding and description, unless otherwise specified, the following embodiments are described by taking the anti-corrosion section 121 as an example that at least corresponds to the tail end of the motor shaft 12, and the anti-corrosion and corrosion resistance are based on the anti-corrosion requirements of C4H in the wind power industry.

[0037] Due to the special working conditions of the motor 100, while the fan 31 is driven by the coaxial drive, the anti-corrosion problem of the motor shaft 12 that passes through the housing assembly 11 and is connected to the fan 31 and is exposed to the air must also be considered, otherwise it is easy to cause damage to the motor shaft 12, reducing its working stability and service life. To address this problem, the motor shaft 12 passes through the housing assembly 11 through the anti-corrosion section 121 and is connected to the fan 31 located outside the housing assembly 11 to provide power for the fan 31. The anti-corrosion section 121 has anti-corrosion and anti-rust properties and at least meets the anti-corrosion requirements of C4H in the wind power industry.

[0038] The motor 100 has a coaxially driven fan 31, which uses the original power to drive the fan 31 to form cooling wind, and performs forced air cooling on the main unit component 10, thereby improving its heat dissipation efficiency and thus improving the motor power density. For the same output power, fewer motor segments are required, which is smaller in size and more cost-effective. At the same time, the motor shaft 12 passes through the housing component 11 through the anti-corrosion segment 121 to connect to the fan 31, so that even if it is partially exposed to the air, it can maintain stable operation.

[0039] Furthermore, the motor 100 further includes a brake housing 40 , which is at least partially located in the direction of the fan 31 and sleeved outside the housing assembly 11 , and is spaced from the surface of the housing assembly 11 to form a flow gap 41 .

[0040] The direction of the fan 31 is the direction of its air discharge. Specifically, the brake housing 40 is connected to the fan rear cover 33 , and the airflow generated by the fan 31 eventually passes through the flow gap 41 to form a cooling airflow flowing along the surface of the housing assembly 11 .

[0041] In this way, the cooling airflow formed by the fan 31 can pass through the flow gap 41 and flow more fully over the surface of the housing assembly 11 to play a cooling role and take away heat.

[0042] In some embodiments, the surface of the anti-corrosion section 121 has a first anti-corrosion layer.

[0043] The first anti-corrosion layer has anti-corrosion properties and is not easy to rust. It can be an additional layer attached to the surface of the anti-corrosion section 121 by means of attachment, spraying, plating, etc., or it can be a surface treatment of the anti-corrosion section 121, such as blueing, so that its surface reacts to form a protective layer as the first anti-corrosion layer.

[0044] In this way, the first anti-corrosion layer can protect the anti-corrosion section 121 and achieve its anti-corrosion and anti-rust functions.

[0045] Specifically, the anti-corrosion section 121 can be treated by electrophoresis to obtain a first anti-corrosion layer on the surface.

[0046] In some other embodiments, the anti-corrosion section 121 may also be directly made of corrosion-resistant materials, such as stainless steel, to achieve the purpose of corrosion resistance and rust prevention.

[0047] In some embodiments, the motor 100 further includes a seal 50, and the seal 50 forms a dynamic seal between the anti-corrosion section 121 and the housing assembly 11. It can be understood that the dynamic seal formed by the seal 50 is a rotary dynamic seal.

[0048] The anti-corrosion section 121 passes through the housing assembly 11. If it is not sealed, a gap will be left, which will reduce the sealing performance of the main assembly 10 and further have a negative impact on the components in the housing assembly 11. The anti-corrosion section 121 can specifically pass through the rear cover 115 of the housing assembly 11, and the sealing member 50 is correspondingly arranged on the rear cover 115 and is located between the rear cover 115 and the anti-corrosion section 121 in the radial direction of the motor shaft 12.

[0049] In this way, the seal 50 improves the sealing performance of the main engine assembly 10 while ensuring the basic rotation performance of the anti-corrosion section 121, so that it can be suitable for the use environment of the motor 100 and ensure the service life of the motor 100.

[0050] In some embodiments, the motor 100 further includes a sleeve 60, which is sleeved on the anti-corrosion section 121 and forms a clearance fit with the anti-corrosion section 121. The sleeve 60 and the anti-corrosion section 121 are jointly inserted into the housing assembly 11, and the seal 50 is fixedly connected to the rear cover 115 and can rotate relative to the sleeve 60.

[0051] Considering that the anti-corrosion section 121 may sacrifice hardness to achieve its anti-corrosion and anti-rust functions, especially when the surface of the anti-corrosion section 121 has a first anti-corrosion layer, the first anti-corrosion layer is extremely important to the anti-corrosion section 121, and it is likely to have poor wear resistance. At this time, even the friction between the seal 50 and it may damage the anti-corrosion section 121, and then damage the motor shaft 12. Therefore, the sleeve 60 is sleeved on the anti-corrosion section 121, located between the seal 50 and the anti-corrosion section 121, to protect the anti-corrosion section 121.

[0052] The sleeve 60 and the anti-corrosion section 121 are fitted with a small gap and are relatively fixed, and the two rotate together. Specifically, there is a certain gap between the inner surface of the sleeve 60 and the outer surface of the anti-corrosion section 121, and the inner diameter of the sleeve 60 is larger than the outer diameter of the anti-corrosion section 121. The sleeve 60 can be quenched to increase its hardness, or made of a high-hardness material, and its hardness is higher than that of the first anti-corrosion layer.

[0053] In this way, under the protection of the sleeve 60, the anti-corrosion section 121 can avoid being damaged by friction of the seal 50, and the small gap between the sleeve 60 and the anti-corrosion section 121 can also prevent friction between the sleeve 60 and the anti-corrosion section 121, thereby stably exerting the anti-corrosion and anti-rust functions, meeting the IP65 sealing design, and at the same time meeting the C4H anti-corrosion design requirements of the wind power industry.

[0054] In some embodiments, the sealing member 50 includes lubricating grease and an oil seal. The lubricating grease is filled between the sleeve 60 and the housing assembly 11 , and the oil seal is used to seal the lubricating grease.

[0055] The oil seal can prevent the leakage of lubricating grease, so that a dynamic seal is formed between the sleeve 60 and the housing assembly 11. In this way, a dynamic seal that meets the requirements is formed between the sleeve 60 and the housing assembly 11 through a simple structure, and the installation is simple and the cost is low.

[0056] In some other embodiments, the seal 50 may also use a magnetic fluid seal, etc., as long as it can achieve a rotary dynamic seal, and no specific limitation is made here.

[0057] In some embodiments, the anti-corrosion section 121 has a radially protruding fixing structure 1211. The motor 100 further includes a fixing member 70, which is disposed at one end of the sleeve 60 away from the fixing structure 1211 and is used to press the sleeve 60 toward the fixing structure 1211 to fix the sleeve 60.

[0058] In this way, after the sleeve 60 is sleeved on the anti-corrosion section 121, the appropriate position is adjusted so that it maintains a small gap fit with the anti-corrosion section 121, and then it is pressed toward the fixed structure 1211 through the fixing member 70, thereby achieving the fixation of the sleeve 60 and the small gap fit between the sleeve 60 and the anti-corrosion section 121.

[0059] Specifically, the resolver rotor of the resolver assembly 16 is also sleeved in the anti-corrosion section 121 and is located at one end of the sleeve 60 close to the fixed structure 1211. The fixing member 70 presses the sleeve 60 and the resolver rotor together to fix the two relative to the anti-corrosion section 121 and enable them to rotate synchronously.

[0060] Furthermore, the surface of the fixing member 70 has a second anti-corrosion layer.

[0061] Since the fixing part 70 is also exposed to the air, its corrosion resistance should also be considered. The second anti-corrosion layer has corrosion resistance and is not easy to rust. It can be an additional layer attached to the surface of the fixing part 70 by means of attachment, spraying, plating, etc., or the surface of the fixing part 70 can be treated, such as blue baking, so that the surface reacts to form a protective layer as the second anti-corrosion layer. The second anti-corrosion layer can be the same as or different from the first anti-corrosion layer.

[0062] Specifically, the surface of the fixing member 70 can be treated with Dacromet to obtain a second anti-corrosion layer. In some other embodiments, the fixing member 70 can also be directly made of corrosion-resistant materials, such as stainless steel, to achieve the purpose of corrosion resistance and rust prevention.

[0063] Furthermore, the fixing member 70 is a nut, and the anti-corrosion section 121 has a thread matching the nut.

[0064] In this way, the fixing member 70 can be tightened to press against the sleeve 60, and the disassembly and assembly method is simple.

[0065] In some embodiments, the motor shaft 12 includes a main shaft section 123 and a secondary shaft section, the secondary shaft section includes an anti-corrosion section 121 , and is drivingly connected to the main shaft section 123 .

[0066] The main shaft section 123 and the secondary shaft section rotate synchronously, and the materials of the two can be the same or different. Specifically, the main shaft section 123 and the secondary shaft section can be coaxial and non-rotatably connected.

[0067] Thus, judging from the overall length of the motor shaft 12, it is long and thin. If an integral shaft is used for processing, the shaft runout and precision will be difficult to meet the use requirements. The motor shaft 12 is processed in sections to reduce the length of a single section, avoid the problem of low yield rate in precision slender shaft processing, reduce the processing difficulty, and facilitate mass production. In addition, the motor shaft 12 does not need to be treated with corrosion protection, but the secondary shaft section serving as the corrosion protection section 121 can be subjected to electrophoresis, blue baking and other treatments to form a first corrosion protection layer, or only the secondary shaft section serving as the corrosion protection section 121 can be made of corrosion-resistant materials such as stainless steel.

[0068] Furthermore, one end of each of the main shaft section 123 and the auxiliary shaft section is connected by end nesting and interference fit.

[0069] One end of the main shaft section 123 is nested with one end of the auxiliary shaft section, and the nesting is an interference fit. After the fit is formed, the main shaft section 123 and the auxiliary shaft section form a stable connection. The interference fit can be formed by a shrink fit process.

[0070] Specifically, one end of the main shaft section 123 and the secondary shaft section is a convex end 1231, and one end of the other is a concave end 1213. The two are nested through the cooperation of the convex end 1231 and the concave end 1213, that is, the concave end 1213 is sleeved on the convex end 1231.

[0071] In this way, although the main shaft section 123 and the secondary shaft section can be designed and produced separately, and selectively processed, they form a whole shaft after being connected, and coaxially perform output pitch control and drive fan 31 for forced air cooling.

[0072] In some embodiments, the motor 100 further includes a heavy-loaded aviation plug 80, a circuit and a sealing gasket 90. The housing assembly 11 has a wire hole, the circuit passes through the wire hole and is connected to the heavy-loaded aviation plug 80, and the sealing gasket 90 is used to seal the wire hole.

[0073] The heavy-duty aviation plug 80 has the advantage of high integration, and the lines include but are not limited to power lines, resolver lines, brake 17 lines and temperature control lines, etc. Among them, the wire holes corresponding to the power lines are located in the housing assembly 11, and the wire holes for the resolver lines, brake 17 lines and temperature control lines are located in the brake housing 40.

[0074] In this way, under the sealing of the sealing gasket 90 , the sealing degree of the motor 100 is improved to meet the sealing design of IP65.

[0075] The above-mentioned motor 100 has a coaxially driven fan 31. Compared with natural cooling air, the forced air cooling achieved by the fan 31 has high heat dissipation efficiency, which helps to improve the output power density of the motor 100. Under the same output power, the motor 100 has fewer sections, a smaller size and better cost. The motor shaft 12 is processed in sections, and is specifically divided into a main shaft section 123 and a secondary shaft section. Then the main shaft section 123 and the secondary shaft section are connected to form a whole shaft by a heat sleeve method, which solves the problem of low yield rate of precision slender shaft processing, reduces the processing difficulty, and facilitates mass production. The surface of the secondary shaft section is treated by electrophoresis to form a first anti-corrosion layer. At the same time, an oil seal is used at the joint between the secondary shaft section and the casing assembly 11. The oil seal does not contact the electrophoretically treated secondary shaft section, but directly contacts the sleeve installed on the secondary shaft, which meets the IP65 sealing design and also meets the anti-corrosion design requirements of C4H in the wind power industry.

[0076] The present application also provides a wind turbine generator, comprising the above-mentioned motor 100.

[0077] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0078] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A motor, characterized in that: The motor comprises: A main machine component (10) comprises a housing component (11) and a motor shaft (12), wherein the motor shaft (12) comprises an anti-corrosion section (121), and the anti-corrosion section (121) is disposed through the housing component (11); and The fan (31) is drivingly connected to the anti-corrosion section (121).

2. The motor according to claim 1, characterized in that The surface of the anti-corrosion section (121) has a first anti-corrosion layer.

3. The motor according to claim 1 or 2, characterized in that: The motor further comprises a sealing member (50), wherein the sealing member (50) forms a dynamic seal between the anti-corrosion section (121) and the casing assembly (11).

4. The motor according to claim 3, characterized in that The motor further comprises a sleeve (60), the sleeve (60) being sleeved on the anti-corrosion section (121) and forming a clearance fit with the anti-corrosion section (121), the sleeve (60) and the anti-corrosion section (121) being jointly inserted into the housing assembly (11), and the sealing element (50) forming the dynamic seal between the sleeve (60) and the housing assembly (11).

5. The motor according to claim 4, characterized in that The anti-corrosion section (121) has a fixing structure (1211) protruding in the radial direction; the motor further comprises a fixing member (70), the fixing member (70) being arranged at an end of the sleeve (60) away from the fixing structure (1211) and being used to press against and fix the sleeve (60) towards the fixing structure (1211).

6. The motor according to claim 5, characterized in that The surface of the fixing element (70) has a second anti-corrosion layer.

7. The motor according to claim 5, characterized in that The fixing member (70) is a nut, and the anti-corrosion section (121) has a thread that matches the nut.

8. The motor according to claim 4, characterized in that The sealing component (50) comprises lubricating grease and an oil seal, the lubricating grease is filled between the sleeve (60) and the housing assembly (11), and the oil seal is used to seal the lubricating grease.

9. The motor according to claim 1 or 2, characterized in that: The motor shaft (12) comprises a main shaft section (123) and a secondary shaft section; the secondary shaft section comprises the anti-corrosion section (121) and is drivingly connected to the main shaft section (123).

10. The motor according to claim 9, characterized in that One end of each of the main shaft section (123) and the secondary shaft section is connected by end nesting and interference fit.

11. The motor according to claim 1, characterized in that The motor further comprises a heavy-loaded aviation plug (80), a circuit and a sealing gasket (90); the housing assembly (11) has a wire-passing hole, the circuit passes through the wire-passing hole and is connected to the heavy-loaded aviation plug (80); the sealing gasket (90) is used to seal the wire-passing hole.

12. The motor according to claim 1, characterized in that The motor further comprises a brake housing (40), wherein the brake housing (40) is at least partially located in the direction of the fan (31) and is sleeved outside the housing assembly (11), and is spaced from the surface of the housing assembly (11) to form a flow gap (41).

13. A wind turbine generator, characterized in that: A motor comprising any one of claims 1-12.

Images