Sealing structure

Abstract

The utility model relates to the technical field of motor encapsulation, in particular to a sealing structure, which is applied to motor rotor encapsulation and comprises a base, a radial pressing mechanism and an upper cover plate, a spigot is arranged in the center of the base and used for supporting a motor rotor, and a lower sealing gasket is arranged above the spigot; a plurality of fixing columns are arranged on the base, the radial pressing mechanism is arranged on the fixing columns, and a radial sealing gasket is arranged on the radial pressing mechanism; the upper cover plate is oppositely arranged above the base and connected to the fixing column, and an upper sealing gasket is arranged below the upper cover plate. Therefore, by arranging the sealing gaskets along the axial direction and the radial direction of the motor rotor, the sealing effect of the encapsulation of the motor rotor can be improved, the leakage of the encapsulation liquid is avoided, and the performance of the motor rotor is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of motor potting, in particular to a sealing structure used for potting a motor rotor. Background Art

[0002] At present, the demand for electric drive integrated systems in the automotive market is gradually expanding. Due to the huge capacity of the automotive market, the diversity of the customer base of each OEM, and the uniqueness of the overall design of each OEM's car, the automotive market has created a flourishing demand for electric drive integrated systems.

[0003] The motor is the power source of the electric drive system. Combined with the dynamic design requirements of the whole vehicle, the almost harsh, subjective and irregular requirements of drivers and passengers for NVH, the objective needs of NEDC and more complex actual operating conditions of automobiles, the electric drive system shows an increasingly higher trend for motor speed (since 2019, most OEMs have achieved electric drive designs with rpm of 15,000 to 18,000).

[0004] Based on this situation, the electric drive system has gradually increased its requirements for the dynamic performance of the motor rotor, which is specifically manifested in the need for strong rigidity at high speed, the elasticity change range to be less than 0.08mm, good stability, and the elasticity change range to be less than 0.05mm when the rotor structure is subjected to stress under continuous high-speed working conditions. The motor rotor potting process can effectively improve the above two situations. Based on the motor rotor potting process, a sealing structure for motor rotor potting is specially designed. Utility Model Content

[0005] In view of this, the utility model provides a sealing structure for motor rotor potting, which can improve the sealing effect of motor rotor potting and avoid potting liquid leakage by arranging sealing gaskets along the axial and radial directions of the motor rotor, thereby improving the performance of the motor rotor.

[0006] An embodiment of the utility model provides a sealing structure used for potting of motor rotors, including a base, a radial clamping mechanism and an upper cover plate, a stopper is arranged at the center of the base, the stopper is used to support the motor rotor, and a lower sealing gasket is arranged above the stopper; a plurality of fixing columns are arranged on the base, the radial clamping mechanism is arranged on the fixing columns, and a radial sealing gasket is arranged on the radial clamping mechanism; the upper cover plate is arranged relatively above the base, the upper cover plate is connected to the fixing columns, and an upper sealing gasket is arranged below the upper cover plate.

[0007] Furthermore, the upper sealing gasket, the lower sealing gasket and the radial sealing gasket are Teflon sealing gaskets.

[0008] Furthermore, the sealing structure also includes a fixing bolt and a clamping bolt. A first connecting hole is opened on the base, a second connecting hole is opened at the bottom of the fixing column, and the fixing bolt is passed through the first connecting hole and the second connecting hole; a third connecting hole is opened on the upper cover plate, a fourth connecting hole is opened at the top of the fixing column, and the clamping bolt is passed through the third connecting hole and the fourth connecting hole.

[0009] Furthermore, the radial clamping mechanism includes an adjusting bolt and a sealing base plate, an adjusting hole is radially opened on the fixing column, and the adjusting bolt is passed through the adjusting hole; the sealing base plate is connected to the adjusting bolt so that the sealing base plate is located on the side close to the motor rotor; wherein the radial sealing gasket is connected to the sealing base plate.

[0010] The beneficial effects of the technical solution provided by the embodiment of the utility model include at least: a sealing structure applied to the potting of a motor rotor, including a base, a radial clamping mechanism and an upper cover plate, a stopper is arranged at the center of the base, the stopper is used to support the motor rotor, and a lower sealing gasket is arranged above the stopper; a plurality of fixed columns are arranged on the base, the radial clamping mechanism is arranged on the fixed columns, and a radial sealing gasket is arranged on the radial clamping mechanism; the upper cover plate is arranged relatively above the base, the upper cover plate is connected to the fixed columns, and an upper sealing gasket is arranged below the upper cover plate. Therefore, by arranging the sealing gasket along the axial and radial directions of the motor rotor, the sealing effect of the potting of the motor rotor can be improved, the leakage of the potting liquid can be avoided, and the performance of the motor rotor can be improved.

[0011] Among them, the upper sealing gasket, lower sealing gasket and radial sealing gasket are made of Teflon material, which has the characteristic of softening when heated. At a temperature of 150 degrees Celsius, the expansion amount is between 0.2 and 0.4 mm, and it is compressible. The recovery rate at room temperature is 99%, the deformation amount is small, and the contact sealing connection between the sealing gasket and the motor rotor can be realized.

[0012] Among them, by setting the clamping bolts, the axial clamping force of the upper cover plate on the motor rotor can be adjusted; by setting the adjusting bolts, the radial clamping force of the radial clamping mechanism on the motor rotor can be adjusted, thereby ensuring the contact sealing connection between the motor rotor and the sealing structure in all directions.

[0013] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] By reading the detailed description of the preferred embodiment below, various other advantages and benefits will become clear to those of ordinary skill in the art. The accompanying drawings are only used for the purpose of illustrating the preferred embodiment and are not considered to be limiting of the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. Among them:

[0015] Figure 1 A structural schematic diagram of a sealing structure provided by an embodiment of the utility model is shown.

[0016] in, Figure 1 The corresponding relationship between the reference numerals and the component names is as follows:

[0017] 1 base, 2 stopper, 3 motor rotor, 4 lower sealing gasket, 5 fixing column, 6 radial sealing gasket, 7 upper cover plate, 8 upper sealing gasket, 9 fixing bolts, 10 tightening bolts, 11 adjusting bolts, 12 sealing bottom plate. DETAILED DESCRIPTION

[0018] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the utility model and the features in the embodiments can be combined with each other without conflict.

[0019] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0020] Refer to the following Figure 1 A sealing structure for potting a motor rotor 3 is described according to some embodiments of the present invention.

[0021] like Figure 1As shown, a sealing structure for encapsulating a motor rotor 3 provided according to an embodiment of the utility model includes a base 1, a radial clamping mechanism and an upper cover plate 7, wherein the base 1 is used to support the sealing structure as a whole, and a stopper 2 is provided at the center of the base 1, and the stopper 2 is used to support the motor rotor 3 so that the motor rotor 3 can be installed inside the sealing structure; a lower sealing gasket 4 is provided above the stopper 2 for sealing the bottom of the motor rotor 3, wherein the lower sealing gasket 4 is connected to the base 1 by bolts; a plurality of fixing columns 5 are provided on the base 1, and a radial clamping mechanism is provided on the fixing columns 5 for generating a radial clamping force on the motor rotor 3; a radial sealing gasket 6 is provided on the radial clamping mechanism for sealing the radial direction of the motor rotor 3; the upper cover plate 7 is relatively provided above the base 1, and the upper cover plate 7 is connected to the fixing columns 5 for generating an axial clamping force on the motor rotor 3; an upper sealing gasket 8 is provided below the upper cover plate 7 for sealing the top of the motor rotor 3. Therefore, by arranging sealing gaskets along the axial and radial directions of the motor rotor 3 , the motor rotor 3 is completely potted in all directions, which can improve the sealing effect of the potting of the motor rotor 3 , avoid potting liquid leakage, and further improve the performance of the motor rotor 3 .

[0022] Specifically, the number and shape of the radial seals 6 need to be determined according to the type and model of the motor rotor 3, so that the radial seals 6 can mesh with the motor rotor 3 in the radial direction. If it is applied to the rotor of an electromagnetic motor, the number and shape of the radial seals 6 need to be determined according to the number and shape of the salient poles; if it is applied to the rotor of an asynchronous motor, the number and shape of the radial seals 6 need to be determined according to whether the asynchronous motor specifically adopts a squirrel cage rotor or a coil rotor, whether there is a guide bar structure, etc.

[0023] It can be understood that the overall size of the sealing structure is not limited here, and the overall size of the sealing structure can be adjusted according to the actual size and structure of the motor rotor 3, whether it has a rotating shaft, whether it is a motor rotor 3 with a coil core combination or a motor rotor 3 with a single cage, etc., so that the sealing structure can match the motor rotor 3, thereby achieving the sealing of the motor rotor 3 during potting.

[0024] The upper cover plate 7 is provided with a pre-installed hole, which can be used to initially position the upper sealing gasket 8 , and the upper sealing gasket 8 can be fastened to the upper cover plate 7 by passing bolts through the pre-installed hole.

[0025] like Figure 1 As shown, the upper sealing gasket 8, the lower sealing gasket 4 and the radial sealing gasket 6 are Teflon sealing gaskets.

[0026] Specifically, the sealing gasket made of Teflon material has the property of softening when heated. At a temperature of 150 degrees Celsius, the expansion amount is between 0.2 and 0.4 mm, and it is compressible. The recovery rate at room temperature is 99%, and the deformation amount is small. It can achieve a contact sealing connection between the sealing gasket and the motor rotor 3 to avoid leakage of the potting liquid. Before assembling the motor rotor 3 to the sealing structure, the motor rotor 3 and the sealing structure need to be preheated at the same time. The preheating temperature is between 120 and 130 degrees Celsius, and the preheating time is 2 hours. After the preheating is completed and the assembly is completed, the subsequent operations can be carried out directly.

[0027] like Figure 1 As shown, the sealing structure also includes a fixing bolt 9 and a clamping bolt 10. A first connecting hole is opened on the base 1, and a second connecting hole is opened at the bottom of the fixing column 5. The fixing bolt 9 is penetrated through the first connecting hole and the second connecting hole to connect the fixing column 5 to the base 1, so that the radial clamping mechanism arranged on the fixing column 5 can generate a radial clamping force on the motor rotor 3; a third connecting hole is opened on the upper cover plate 7, and a fourth connecting hole is opened on the top of the fixing column 5. The clamping bolt 10 is penetrated through the third connecting hole and the fourth connecting hole to connect the upper cover plate 7 to the fixing column 5, and the axial clamping force of the upper cover plate 7 on the motor rotor 3 can be adjusted by adjusting the clamping bolt 10.

[0028] like Figure 1 As shown, the radial clamping mechanism includes an adjusting bolt 11 and a sealing bottom plate 12. An adjusting hole is radially opened on the fixing column 5. The adjusting bolt 11 is passed through the adjusting hole to adjust the radial clamping force of the radial clamping mechanism on the motor rotor 3. The sealing bottom plate 12 is connected to the adjusting bolt 11 so that the sealing bottom plate 12 is located on a side close to the motor rotor 3. The radial sealing gasket 6 is connected to the sealing bottom plate 12 so that the radial sealing gasket 6 can be used to contact and seal the motor rotor 3.

[0029] It can be understood that by setting the clamping bolt 10, the axial clamping force of the upper cover plate 7 on the motor rotor 3 can be adjusted; by setting the adjusting bolt 11, the radial clamping force of the radial clamping mechanism on the motor rotor 3 can be adjusted, thereby ensuring that the motor rotor 3 is in contact and sealed connection with the sealing structure in all directions, so as to facilitate the potting of the motor rotor 3.

[0030] In the description of the present invention, the term "plurality" refers to two or more than two. Unless otherwise clearly defined, the terms "upper" and "lower" indicate positions or positional relationships based on the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do 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 invention. The terms "connection", "installation", "fixation", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] In the description of the present invention, the terms "one embodiment", "some embodiments", "specific embodiments", etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In the present invention, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0032] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A sealing structure, used for potting a motor rotor (3), characterized in that: include: A base (1), wherein a stopper (2) is arranged at the center of the base (1), the stopper (2) is used to support the motor rotor (3), and a lower sealing gasket (4) is arranged above the stopper (2); A radial pressing mechanism, wherein a plurality of fixing columns (5) are arranged on the base (1), the radial pressing mechanism is arranged on the fixing columns (5), and a radial sealing gasket (6) is arranged on the radial pressing mechanism; An upper cover plate (7), the upper cover plate (7) being arranged relatively above the base (1), the upper cover plate (7) being connected to the fixing column (5), and an upper sealing gasket (8) being arranged below the upper cover plate (7).

2. The sealing structure according to claim 1, characterized in that: The upper sealing gasket (8), the lower sealing gasket (4) and the radial sealing gasket (6) are Teflon sealing gaskets.

3. The sealing structure according to claim 1, characterized in that: Also includes: A fixing bolt (9), wherein a first connection hole is formed on the base (1), a second connection hole is formed at the bottom of the fixing column (5), and the fixing bolt (9) is passed through the first connection hole and the second connection hole; A clamping bolt (10), a third connection hole is opened on the upper cover plate (7), a fourth connection hole is opened on the top of the fixing column (5), and the clamping bolt (10) is inserted through the third connection hole and the fourth connection hole.

4. The sealing structure according to claim 1, characterized in that: The radial pressing mechanism comprises: An adjusting bolt (11), wherein an adjusting hole is radially opened on the fixing column (5), and the adjusting bolt (11) is passed through the adjusting hole; A sealing bottom plate (12), the sealing bottom plate (12) being connected to the adjusting bolt (11) so that the sealing bottom plate (12) is located on a side close to the motor rotor (3); Wherein, the radial sealing gasket (6) is connected to the sealing bottom plate (12).

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