End cover, motor and water pump

Abstract

The utility model relates to the field of bearing installation, in particular to an end cover, a motor and a water pump. The end cover comprises a body and a mounting ring, the mounting ring is connected to the body, the thermal expansion coefficient of the mounting ring is smaller than that of the body, and a bearing is embedded in the mounting ring; furthermore, a baffle ring integrally formed with the mounting ring is further included, the thermal expansion coefficient of the baffle ring is equal to that of the mounting ring, and the baffle ring is used for abutting against the bearing. In addition, the body is provided with an installation groove, the installation ring is embedded in the installation groove, and the body is provided with a conical peripheral face to improve installation stability. The embedded blocks and the embedded grooves are further arranged, so that the structural strength is enhanced. By optimizing the design of the end cover, deformation caused by temperature difference is effectively reduced, and the stability and reliability of equipment operation are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of bearing installation, in particular to an end cover and a motor and a water pump. BACKGROUND

[0002] The end cover is an important component of rotating equipment such as motors and water pumps, mainly used to support the bearing and keep its position stable. With the development of industrial technology, the working environment of these devices is becoming increasingly complex and variable, especially in high temperature conditions, the performance of the end cover directly affects the operating efficiency and service life of the entire system. Therefore, how to ensure the reliability and stability of the end cover under different temperature conditions has become the focus of technical personnel.

[0003] Currently, in the field of motors and water pumps, in order to improve the strength and reduce the weight of the end cover, aluminum alloy material is generally used to manufacture the end cover. This material has good thermal conductivity, lightweight characteristics and relatively low cost advantage. However, for the design of the bearing and the end cover fitting part, the general practice is to set a bearing chamber in the end cover, and the bearing outer ring is pressed into it through interference fit. In addition, some designs will add dustproof sealing device or cooling water channel outside the bearing chamber to assist heat dissipation.

[0004] Although the above measures can meet the basic needs to some extent, there are still some deficiencies in the actual application process. Especially in high temperature environment, due to the large thermal expansion coefficient of aluminum alloy material, when the device generates heat for a long time, the diameter of the bearing chamber in the end cover will gradually expand, so that a large gap is formed between the bearing outer ring and the bearing chamber which originally contact closely. This not only affects the normal operation of the bearing, but also accelerates the wear and reduces the service life. In order to solve this problem, it is necessary to find a method that can effectively reduce the size change caused by temperature difference. CONTENT OF THE INVENTION

[0005] In order to reduce the gap between the bearing and the end cover caused by temperature change, the present application provides an end cover and a motor and a water pump.

[0006] In the first aspect, the present application provides an end cover, which adopts the following technical scheme:

[0007] An end cover, comprising a body and a mounting ring,

[0008] The mounting ring is connected to the body, and the thermal expansion coefficient of the mounting ring is less than the thermal expansion coefficient of the body,

[0009] The mounting ring is used for embedding the bearing.

[0010] By adopting the technical scheme, the thermal expansion coefficient of the mounting ring is smaller than the thermal expansion coefficient of the body, so that the gap between the mounting ring and the bearing outer ring will not increase significantly under the condition of being heated, the problem of loose fit caused by thermal expansion and cold shrinkage is effectively avoided, and the working stability and service life of the bearing are improved.

[0011] Preferably, the mounting ring is integrally formed with the retaining ring.

[0012] The retaining ring is connected to the inner periphery of one end of the mounting ring, and the thermal expansion coefficient of the retaining ring is equal to the thermal expansion coefficient of the mounting ring.

[0013] The retaining ring is used for abutting against the bearing.

[0014] By adopting the technical scheme, the retaining ring is used for positioning the bearing installation. At the same time, the thermal expansion coefficient of the retaining ring is the same as that of the mounting ring, which makes the retaining ring and the mounting ring have the same thermal expansion characteristics under high temperature environment, avoids the gap change caused by the difference in thermal expansion between different materials, and ensures that the bearing can stably abut against the retaining ring during operation, thereby improving the reliability and stability of the system.

[0015] Preferably, the retaining ring and the mounting ring are integrally formed.

[0016] By adopting the technical scheme, the integrally formed retaining ring and mounting ring can effectively reduce the assembly process and improve the production efficiency. At the same time, this structure design makes the retaining ring and the mounting ring have better connection strength and sealing performance, thereby further ensuring the stability and reliability of the bearing under high temperature environment.

[0017] Preferably, the body is provided with a mounting groove.

[0018] The mounting ring is embedded in the mounting groove.

[0019] In the axial direction of the mounting ring, the outer diameter of the mounting ring at one end of the mounting groove is greater than the outer diameter of the middle part of the mounting ring.

[0020] By adopting the technical scheme, the mounting ring can be more stably fixed in the body when heated, preventing loose caused by thermal expansion and cold shrinkage, thereby improving the stability and reliability of the entire structure.

[0021] Preferably, the outer periphery of the mounting ring is a conical surface.

[0022] By adopting the technical scheme, compared with the stepped surface, the conical surface design of the present scheme makes the mounting ring more easily maintain the state of fitting the body when heated, thereby ensuring the stability and reliability between the bearing outer ring and the mounting ring.

[0023] Preferably, the mounting ring is integrally formed with the retaining ring.

[0024] The retaining block is connected to the body.

[0025] The mounting ring is provided with a slot for embedding the block.

[0026] By adopting the above technical scheme, the connection of the block and the body and the slot design on the mounting ring can effectively prevent the mounting ring from loosening or falling off during work, thereby improving the overall stability and reliability of the end cover.

[0027] Preferably, the block and the body are integrally formed.

[0028] By adopting the above technical scheme, the integrally formed block and body can enhance the overall structural strength of the end cover, improve the durability and reliability of the end cover. In addition, this design simplifies the manufacturing process, reduces the assembly steps, and reduces the production cost.

[0029] In a second aspect, the application provides an electric machine, which adopts the following technical scheme:

[0030] An electric machine comprising the end cover described above.

[0031] By adopting the above technical scheme, the end cover of the electric machine can effectively solve the problem of increased gap between the bearing and the end cover caused by thermal expansion and contraction.

[0032] In a third aspect, the application provides a water pump, which adopts the following technical scheme:

[0033] A water pump comprising the end cover described above.

[0034] By adopting the above technical scheme, the end cover of the water pump can effectively reduce the problem of increased gap between the bearing and the end cover caused by temperature change.

[0035] In summary, the application has at least one of the following beneficial technical effects:

[0036] 1. The thermal expansion coefficient of the mounting ring is smaller than that of the body, so that the expansion amount of the mounting ring relative to the body is smaller in a high-temperature environment, thereby effectively reducing the gap between the bearing outer ring and the mounting ring, and ensuring the stability and service life of the equipment.

[0037] 2. By embedding the mounting ring into the mounting groove of the body, and making the outer diameter of the mounting ring at one end of the mounting groove larger than that at the middle part, the connection strength between the mounting ring and the body is enhanced, and the overall stability of the structure is improved.

[0038] 3. The thermal expansion coefficient of the retaining ring is equal to that of the mounting ring, which ensures that the retaining ring and the mounting ring have the same expansion rate in a high-temperature environment, further reduces the relative displacement between the bearing and the end cover, and improves the reliability of the system. BRIEF DESCRIPTION OF DRAWINGS

[0039] Figure 1 is a schematic view of the end cover in the embodiments of the present application.

[0040] Reference signs: 1, body; 11, mounting groove; 12, avoiding hole; 2, mounting ring; 21, embedding groove; 3, blocking ring; 4, embedding block. DETAILED DESCRIPTION

[0041] The present application is further described in detail below with reference to the accompanying drawings.

[0042] Reference Figure 1 The embodiments of the present application disclose an end cover, comprising a body 1 and a mounting ring 2.

[0043] The body 1 is provided with a mounting groove 11. The mounting ring 2 is coaxially embedded in the mounting groove 11, and the mounting ring 2 and the body 1 are in interference fit.

[0044] The mounting ring 2 is used for embedding the bearing. More specifically: the outer periphery of the bearing is embedded in the mounting ring 2 in interference.

[0045] Meanwhile, the body 1 (at the groove bottom of the mounting groove 11) is provided with an avoiding hole 12 for the shaft to pass through.

[0046] The thermal expansion coefficient of the mounting ring 2 is less than that of the body 1. For example: the mounting ring 2 is made of steel, and the body 1 is made of aluminum or aluminum alloy; the linear expansion coefficient of commonly used 304 stainless steel is about 17.3x10^-6 / ℃, and the linear expansion coefficient of aluminum can reach 23.1x10^-6 / ℃.

[0047] In the case of heating, the diameter of the mounting ring 2 expands less than the body 1, so as to avoid the gap between the bearing and the mounting ring 2 being too large.

[0048] The mounting ring 2 has A end and B end along the two ends of its own axial direction. The A end of the mounting ring 2 is deeply embedded in the mounting groove 11. The outer peripheral surface of the mounting ring 2 is a conical surface, and the outer diameter of the A end of the mounting ring 2 is greater than that of the B end.

[0049] It should be noted that the inner peripheral surface of the mounting groove 11 can still be a cylindrical surface; and the outer diameter of the A end is slightly larger than that of the B end, for example: the difference between the outer diameter of the A end and that of the B end is 0.05-0.1mm; so that the mounting ring 2 can be embedded in the mounting groove 11 in interference.

[0050] The end cover further comprises a blocking ring 3.

[0051] The blocking ring 3 is coaxially fixedly connected to the inner periphery of the A end of the mounting ring 2. The thermal expansion coefficient of the blocking ring 3 is equal to that of the mounting ring 2. The blocking ring 3 is used for bearing abutting.

[0052] In the embodiments: the blocking ring 3 and the mounting ring 2 are integrally formed. In other embodiments: the blocking ring 3 can be embedded in the mounting ring 2 in interference.

[0053] The mounting ring 2 is further provided with an embedding groove 21. The end cover further comprises an embedding block 4. The embedding block 4 is fixedly connected to the body 1, and the embedding block 4 is used to be embedded in the embedding groove 21.

[0054] In the embodiment, the embedding block 4 and the body 1 are integrally formed, and the embedding block 4 is embedded in the embedding groove 21 in an interference fit.

[0055] In the drawings, the embedding groove 21 is located at the end face of the mounting ring 2A end, and the embedding groove 21 penetrates through the outer circumferential surface of the mounting ring 2. In other embodiments, the embedding groove 21 can be located at the middle of the end face of the mounting ring 2A end, or the embedding groove 21 can be located at the middle of the outer circumferential surface of the mounting ring 2.

[0056] The implementation principle of the end cover in the embodiment is that by arranging the mounting ring 2 with a low thermal expansion coefficient inside the end cover, the size change caused by temperature change can be significantly reduced, so as to ensure the close fit between the bearing and the mounting ring 2. At the same time, by designing various connection modes and additional structures, the stability and reliability of the mounting ring 2 are improved, and the service life of the equipment is prolonged.

[0057] The embodiment of the application further discloses a motor comprising the end cover.

[0058] The implementation principle of the motor in the embodiment is that the end cover of the motor can effectively reduce the problem of increased gap between the bearing and the mounting ring 2 caused by temperature change. Specifically:

[0059] 1. The thermal expansion coefficient of the mounting ring 2 is smaller than the thermal expansion coefficient of the body 1, so that a small gap is maintained between the bearing outer ring and the mounting ring 2 in a high-temperature environment, thereby improving the stability and reliability of the motor operation;

[0060] 2. The arrangement of the retaining ring 3 further enhances the structural stability and prevents the bearing from being displaced when subjected to force, and the thermal expansion coefficient of the retaining ring 3 is equal to that of the mounting ring 2, so as to ensure the thermal expansion consistency of the whole system;

[0061] 3. The integrally formed design of the mounting ring 2 and the retaining ring 3 simplifies the manufacturing process, improves the production efficiency, and also enhances the overall strength and durability of the components;

[0062] 4. The special shape design (such as a tapered surface) of the mounting groove 11 on the body 1 and the mounting ring 2 makes the installation more convenient, increases the contact area between the mounting ring 2 and the body 1, and improves the firmness of the connection;

[0063] 5. The design of the embedding block 4 and the embedding groove 21 not only strengthens the connection between the mounting ring 2 and the body 1, but also further reduces the risk of loosening caused by factors such as vibration, and improves the stability of the overall structure.

[0064] The embodiment of the application further discloses a water pump comprising the end cover.

[0065] The implementation principle of the water pump is that the gap problem between the bearing and the end cover caused by temperature change can be effectively reduced.

[0066] 1. The thermal expansion coefficient of the mounting ring 2 is smaller than that of the body 1, so that the cooperation between the mounting ring 2 and the bearing outer ring is more compact in a high-temperature environment, the problem of increased gap caused by thermal expansion and cold shrinkage of the traditional aluminum material end cover is avoided, and the stability and reliability of equipment operation are improved;

[0067] 2. The setting of the retaining ring 3 further enhances the stability of the structure and prevents the bearing from being displaced during operation, and the retaining ring 3 and the mounting ring 2 have the same thermal expansion coefficient, so that the coordination of the two at different temperatures is ensured;

[0068] 3. The design of the retaining ring 3 and the mounting ring 2 in one piece simplifies the manufacturing process, reduces the production cost, and also improves the strength and durability of the overall structure;

[0069] 4. The design of the mounting groove 11 on the body 1 enables the mounting ring 2 to be firmly fixed in the specified position, and the outer diameter of the mounting ring 2 at one end of the mounting groove 11 is greater than that of the middle part, so that the contact area is increased and the stability of the mounting ring 2 is improved;

[0070] 5. The outer peripheral surface of the mounting ring 2 is designed as a conical surface, which is helpful for alignment and positioning during installation, reduces the assembly difficulty and improves the assembly efficiency;

[0071] 6. The design of the embedding block 4 and the embedding groove 21 further strengthens the connection between the mounting ring 2 and the body 1, so that the mounting ring 2 can maintain a good fixed state when subjected to external impact or vibration, and the anti-vibration performance of the whole device is improved;

[0072] 7. The design of the embedding block 4 and the body 1 in one piece not only simplifies the production process, but also improves the reliability and durability of the overall structure.

[0073] The above are preferred embodiments of the application, and do not limit the protection scope of the application, therefore: any equivalent changes made on the structure, shape and principle of the application should be covered within the protection scope of the application.

Claims

1. An end cap characterized by, The body (1) and the mounting ring (2), The mounting ring (2) is connected to the body (1), and the thermal expansion coefficient of the mounting ring (2) is less than that of the body (1), The mounting ring (2) is used for embedding the bearing.

2. The end cap of claim 1, wherein Further comprising a retaining ring (3), The retaining ring (3) is connected to the inner periphery of one end of the mounting ring (2), and the thermal expansion coefficient of the retaining ring (3) is equal to that of the mounting ring (2), The retaining ring (3) is used for abutting against the bearing.

3. The end cap of claim 2, wherein, The retaining ring (3) and the mounting ring (2) are integrally formed.

4. The end cap of claim 1, wherein The body (1) is provided with a mounting groove (11), The mounting ring (2) is embedded in the mounting groove (11), Along the axial direction of the mounting ring (2), the outer diameter of the mounting ring (2) at one end of the embedding into the mounting groove (11) is greater than that of the middle part of the mounting ring (2).

5. The end cap of claim 4, wherein, The outer periphery of the mounting ring (2) is a conical surface.

6. The end cap of claim 1, wherein Further comprising an embedding block (4), The embedding block (4) is connected to the body (1), The mounting ring (2) is provided with an embedding groove (21) for embedding the embedding block (4).

7. The end cap of claim 6, wherein The embedding block (4) and the body (1) are integrally formed.

8. An electric machine characterized by The end cover according to any one of claims 1-7.

9. A water pump characterized by comprising: The end cover according to any one of claims 1-7.

Images