Motor with mechanical seal convenient to replace

Abstract

The utility model relates to a motor with a mechanical seal convenient to replace, and relates to the technical field of motors, the motor comprises a casing, a stator and a rotor are arranged in the casing, a fixed end cover and a detachable end cover are also arranged in the casing, and the detachable end cover and the fixed end cover are connected to form an accommodating cavity for accommodating the mechanical seal. The mechanical seal has the advantages of being convenient to disassemble and assemble, and convenient to replace.

Description

Technical Field

[0001] The present application relates to the technical field of motors, and in particular to a motor with an easy-to-replace mechanical seal. Background Art

[0002] The Chinese utility model patent with announcement number CN214959145U discloses a high-efficiency heat dissipation and energy-saving motor for a water pump, including: through an oil chamber, an oil hole, and an anti-swirl plate, the oil hole connects the shaft hole and the oil chamber to ensure that the mechanical oil at the mechanical seal is sufficient and smooth, so that the mechanical seal is fully cooled and lubricated, thereby improving the heat dissipation of the motor; at the same time, it effectively prevents the mechanical oil therein from forming a vortex, which causes air to gather around the mechanical seal, avoiding affecting the cooling and lubrication of the mechanical seal; it discloses a technical solution in which the mechanical seal is located in the oil chamber, but when the mechanical seal needs to be disassembled and installed, it needs to be completely disassembled for replacement, and the disassembly and installation is relatively complicated. Utility Model Content

[0003] In view of the shortcomings of the prior art, one of the purposes of this application is to provide a motor with an easy-to-replace mechanical seal, which has the advantages of easy disassembly and assembly and easy replacement of the mechanical seal.

[0004] The above-mentioned purpose of this application is achieved through the following technical solutions:

[0005] A motor with easy replacement of mechanical seal comprises a casing, a stator and a rotor are arranged in the casing, a fixed end cover and a detachable end cover are also arranged in the casing, and the detachable end cover and the fixed end cover are connected to form an accommodating cavity for accommodating the mechanical seal.

[0006] By adopting the above technical solution, the presence of the detachable end cover makes it possible to replace the machine seal by simply removing the detachable end cover when the machine seal needs to be replaced, making replacement of the machine seal more convenient.

[0007] In a preferred example, the present application can be further configured as follows: the fixed end cover and the casing form an air chamber, the height difference between the upper top surface of the air chamber and the friction surface of the mechanical seal is H, the minimum height difference between the two is Hmin, and the height difference between the liquid level in the casing and the upper top surface of the air chamber is h, then Hmin>h.

[0008] By adopting the above technical solution, the friction surface of the mechanical seal is always located below the liquid level during use, thereby greatly reducing the probability of dry grinding of the mechanical seal.

[0009] In a preferred example, the present application can be further configured as follows: the fixed end cover and the housing form an air chamber, the fixed end cover is also provided with a liquid hole, the liquid hole and the air chamber are connected, and the liquid hole has two states: conductive or non-conductive.

[0010] By adopting the above technical solution, the presence of the liquid hole makes it easier to add liquid and exhaust gas, and also makes it possible to accommodate more gas.

[0011] In a preferred example, the present application can be further configured as follows: a water hole is further provided on the fixed end cover, and the water hole is located below the friction surface of the mechanical seal.

[0012] By adopting the above technical solution, the presence of the water hole makes it easier for the liquid to lubricate the mechanical seal.

[0013] In a preferred example, the present application can be further configured as follows: the stator includes a winding end, and the lower end of the fixed end cover extends into a cavity formed by the nearest winding end.

[0014] By adopting the above technical solution, the overall length of the motor can be reduced while maintaining the same specifications of the motor and limiting the radial size of the motor, and the internal liquid consumption can be reduced as well as the overall cost and weight.

[0015] In a preferred example, the present application can be further configured as follows: an adsorption component is further provided in the housing, the adsorption component is located in the accommodating cavity, and the adsorption component is used to adsorb impurities.

[0016] By adopting the above technical solution, the presence of the adsorption member can reduce the entry of impurities into the gaps between the fitting parts, while reducing the proportion of impurities in the liquid.

[0017] In a preferred example, the present application can be further configured as follows: the adsorption member is installed on the rotor.

[0018] In a preferred example, the present application can be further configured as follows: the mechanical seal includes an upper ring, a lower ring and a spring, the lower ring is provided with a mounting ring for installing the spring, the rotor includes a rotating shaft, and the rotating shaft is provided with a shoulder for installing the spring, assuming the diameter D of the adsorption part, the diameter D1 of the shoulder, and the diameter D2 of the mounting ring, then D≥(D1+D2) / 2.

[0019] In a preferred example, the present application can be further configured as follows: the adsorption component is located below the mechanical seal.

[0020] By adopting the above technical solution, a better adsorption effect is achieved on impurities generated by wear.

[0021] In a preferred example, the present application can be further configured as follows: it also includes a connecting seat, the connecting seat portion extends into the casing and the extending portion is interference fit with the casing, the connecting seat and the casing are sealed and connected, and the fixed end cover is connected to the connecting seat.

[0022] By adopting the above technical solution, a better sealing effect can be achieved and the deformation resistance of the housing end is enhanced. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the cross-sectional structure of this application.

[0024] Figure 2 It is a schematic diagram of the explosion structure of this application.

[0025] Figure 3 It is a schematic diagram of the fixed end cover structure of this application.

[0026] Figure numerals: 1. Casing; 11. Stator; 111. Winding end; 12. Rotor; 121. Rotating shaft; 122. Shaft shoulder; 2. Fixed end cover; 21. Base body; 211. Liquid hole; 212. Water hole; 3. Adsorption part; 4. Accommodating chamber; 5. Connecting seat; 6. Removable end cover; 7. Mechanical seal; 71. Upper ring; 72. Lower ring; 721. Mounting ring; 73. Friction surface; 74. Spring; 8. Air chamber. DETAILED DESCRIPTION

[0027] The present application is further described in detail below with reference to the accompanying drawings.

[0028] Reference Figure 1-Figure 3 , disclosed in the present application, is a motor that is easy to replace a mechanical seal, comprising a casing 1, in which a stator 11 and a rotor 12 are arranged. A connecting seat 5 is installed at the end of the casing 1, and the connecting seat 5 partially extends into the casing 1 and the extended portion is interference fit with the casing 1. The connecting seat 5 and the casing 1 are sealed at the connection (for example, glued and welded), and the connecting seats 5 are connected. A fixed end cover 2 is connected to the connecting seat 5, and the stator 11 includes a winding end 111. The fixed end cover 2 includes a seat body 21 (the lower end of the fixed end cover 2). The seat body 21 extends into a cavity formed by the nearest winding end 111, and the outer wall of the seat body 21 is cylindrical or truncated cone-shaped with a larger upper portion and a smaller lower portion; the minimum distance between the outer surface of the seat body 21 and the winding end 111 is ≥1mm.

[0029] A removable end cap 6 is detachably connected to the fixed end cap 2. The lower end of the fixed end cap 2 extends into the housing 1 and is mounted on the rotating shaft 121 of the rotor 12, where it is rotatably connected via a bearing. The fixed end cap 2, the rotating shaft 121, and the removable end cap 6 form a receiving chamber 4. A mechanical seal 7 is mounted on the rotating shaft 121 and is located within the receiving chamber 4 between the connecting base 5 and the rotating shaft 121. The removable end cap 6 is located above the receiving chamber 4 to seal the top of the receiving chamber 4.

[0030] The fixed end cover 2 and the casing 1 form an air-containing cavity 8. The upper top surface of the air-containing cavity 8 is higher than the friction surface 73 of the mechanical seal 7 (that is, the surface where the dynamic ring and the static ring of the mechanical seal 7 contact each other) and the height difference between the air-containing cavity 8 and the friction surface 73 of the mechanical seal 7 is H. Suppose the minimum height difference between the two is Hmin, and suppose the height difference between the liquid level in the casing 1 and the upper top surface of the air-containing cavity 8 is h, then Hmin>h.

[0031] The fixed end cap 2 is further provided with a liquid passage hole 211, which is connected to the air chamber 8. The liquid passage hole 211 has two states: conductive and non-conductive. That is, the liquid passage hole 211 is in a non-conductive state under normal conditions and is conductive only when liquid addition and / or exhaust is required. The object used to make the liquid passage hole 211 non-conductive can be a bolt, a rubber column, or other object that can block the liquid passage hole 211. There can be multiple liquid passage holes 211, for example, two. When there are multiple liquid passage holes 211, some of the liquid passage holes 211 are used for liquid replenishment, while the remaining liquid passage holes 211 are used for exhaust.

[0032] The fixed end cover 2 is also provided with water holes 212, which can be multiple groups. The water holes 212 are located below the friction surface 73 of the mechanical seal 7. When the fixed end cover 2 and the rotating shaft 121 are rotatably connected through at least two groups of bearings, there is a gap between the two adjacent groups of bearings, and at least one group of water holes 212 is connected to the gap.

[0033] An adsorbent 3 is also provided in the housing 1. The adsorbent 3 is made of a material that can adsorb iron filings, such as a permanent magnetic material. In this embodiment, the adsorbent 3 is annular and is mounted on the rotating shaft 121. In other embodiments, the adsorbent 3 may also be in other shapes, such as a plate, and may also be mounted on the rotating shaft 121 and / or the fixed end cover 2. The adsorbent 3 is located in the accommodating chamber 4 and below the mechanical seal 7. The mechanical seal 7 includes an upper ring 71, a lower ring 72 and a spring 74. The lower ring 72 is provided with a mounting ring 721 for mounting the spring 74. The rotating shaft 121 is provided with a shoulder 122 for mounting the spring 74. Suppose the diameter D of the adsorbent 3, the diameter D1 of the shoulder 122, and the diameter D2 of the mounting ring 721, then D≥(D1+D2) / 2. The plane of the shoulder 122 is higher than the inner bottom surface of the accommodating chamber 4.

[0034] The implementation principle of this embodiment is: when the mechanical seal (mechanical seal 7) needs to be replaced, there is no need to disassemble the end cover assembly as a whole, which simplifies the disassembly steps of the mechanical seal. Through the minimum height difference Hmin, the mechanical seal is always lubricated to avoid dry grinding during the service life of the mechanical seal. The lower end of the seat body 21 extends into the annular column surrounded by the winding end 111, so that the overall length of the motor is reduced. The adsorption member 3 is a permanent magnetic material, so when the iron filings and the like generated by wear in the motor can be magnetically attracted, it is prevented that the iron filings and other impurities are free in the accommodating cavity 4 and damage the mechanical seal 7.

[0035] The embodiments of this specific implementation method are all preferred embodiments of the present application and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A motor with easy replacement of mechanical seal, characterized by: The invention comprises a casing (1), wherein a stator (11) and a rotor (12) are arranged in the casing (1), a fixed end cover (2) and a removable end cover (6) are also arranged in the casing (1), and the removable end cover (6) and the fixed end cover (2) are connected to form an accommodating chamber (4) for accommodating a mechanical seal (7).

2. The motor with easy replacement of mechanical seal according to claim 1, characterized in that: The fixed end cover (2) and the housing (1) form an air accommodating chamber (8). The height difference between the upper top surface of the air accommodating chamber (8) and the friction surface (73) of the mechanical seal (7) is H. The minimum height difference between the two is Hmin. The height difference between the liquid level in the housing (1) and the upper top surface of the air accommodating chamber (8) is h. Then, Hmin>h.

3. The motor with easy replacement of mechanical seal according to claim 1, characterized in that: The fixed end cover (2) and the housing (1) form an air accommodating cavity (8). The fixed end cover (2) is further provided with a liquid passage hole (211). The liquid passage hole (211) and the air accommodating cavity (8) are connected. The liquid passage hole (211) has two states: conductive or non-conductive.

4. The motor with easy replacement of mechanical seal according to claim 1, characterized in that: The fixed end cover (2) is further provided with a water hole (212), and the water hole (212) is located below the friction surface (73) of the mechanical seal (7).

5. The motor with easy replacement of mechanical seal according to claim 1, characterized in that: The stator (11) includes winding ends (111), and the lower end of the fixed end cover (2) extends into a cavity formed by the winding ends (111) closest to the stator.

6. The motor with easy replacement of mechanical seal according to claim 1, characterized in that: An adsorption member (3) is further provided in the housing (1). The adsorption member (3) is located in the accommodating cavity (4). The adsorption member (3) is used to adsorb impurities.

7. The motor with easy replacement of mechanical seal according to claim 6, characterized in that: The adsorption member (3) is mounted on the rotor (12).

8. The motor with easy replacement of mechanical seal according to claim 7, characterized in that: The mechanical seal (7) includes an upper ring (71), a lower ring (72) and a spring (74); the lower ring (72) is provided with a mounting ring (721) for mounting the spring (74); the rotor (12) includes a rotating shaft (121); the rotating shaft (121) is provided with a shaft shoulder (122) for mounting the spring (74); assuming that the diameter D of the adsorption member (3), the diameter D1 of the shaft shoulder (122), and the diameter D2 of the mounting ring (721) are equal to or greater than (D1+D2) / 2.

9. A motor with easy replacement of mechanical seal according to claim 7 or 8, characterized in that: The adsorption member (3) is located below the mechanical seal (7).

10. The motor with easy replacement of mechanical seal according to claim 1, characterized in that: The invention also includes a connecting seat (5), wherein the connecting seat (5) partially extends into the housing (1) and the extending portion is interference-fitted with the housing (1), the connecting seat (5) and the housing (1) are sealed and connected, and the fixed end cover (2) and the connecting seat (5) are connected.

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