Cable extension sealing structure for pump motor

Abstract

The utility model provides a cable extension sealing structure for a pump motor, and belongs to the technical field of motors. The problem that an existing motor is poor in structural stability is solved. According to the pump motor cable extending-out sealing structure, a motor comprises a top cover, a cable passing hole allowing the cable to penetrate is vertically formed in the top cover in a penetrating mode, the sealing structure comprises a positioning cylinder vertically fixed in the cable passing hole, the cable is sleeved with the positioning cylinder, and sealing is formed between the outer wall of the positioning cylinder and the inner wall of the cable passing hole; the positioning cylinder is made of an elastic metal material, the upper end of the positioning cylinder is a thin-wall-shaped positioning part, the outer wall of the positioning part is concave inwards so as to form an annular convex part on the inner wall of the positioning part, an annular gap exists between the positioning cylinder and the cable, epoxy resin is encapsulated in the annular gap, and the upper side of the epoxy resin extends to the positioning part. The cable extension sealing structure for the pump motor is stable in structure.

Description

Technical Field

[0001] The utility model belongs to the technical field of motors and relates to a pump motor, in particular to a pump motor cable extension sealing structure. Background Art

[0002] A pump motor is an electric motor that provides power for a pump. Its main function is to convert electrical energy into mechanical energy to drive the pump to work. It is widely used in various pump equipment, such as water pumps, oil pumps, chemical pumps, etc.

[0003] Existing pump motors, such as a motor portion of a deep well pump disclosed in the China Patent Library (application number: 201520021303.1), include a motor shaft, a cable, a motor housing, a rotor and a stator coil arranged outside the rotor, the cable extends into the motor housing and is connected to the stator coil, the stator coil has a stator wire head connected to the cable wire head of the cable, an insulating and sealed sealing ring sleeve is provided at the connection between the stator wire head and the cable wire head, the sealing ring sleeve is horizontally sleeved on the motor shaft, and the sealing ring sleeve is filled with insulating silica gel; an oil cylinder is also provided in the motor housing and the oil cylinder is located on the upper part of the sealing ring sleeve, the cable passes through the inside of the oil cylinder and is connected to the stator coil, a clamping sleeve and a clamping nut are provided between the cable and the oil cylinder, and the end of the clamping nut abuts against the clamping sleeve.

[0004] In the above-mentioned motor part, the cable forms a seal with the oil cylinder through the compression nut and the compression sheath, but this sealing method cannot effectively limit the axial movement of the cable. When the cable is pulled by force and moves, there is a probability of separation from the stator joint, affecting the use of the motor. Utility Model Content

[0005] The utility model aims to solve the above problems in the prior art and proposes a pump motor cable extension sealing structure with stable structure.

[0006] The purpose of the utility model can be achieved through the following technical solutions: a pump motor cable extends out of a sealing structure, the motor includes a top cover, and a wire hole for the cable to pass through is vertically penetrated on the top cover, and is characterized in that the sealing structure includes a positioning cylinder vertically fixed in the wire hole, the positioning cylinder is sleeved outside the cable, and a seal is formed between the outer wall of the positioning cylinder and the inner wall of the wire hole; the positioning cylinder is made of elastic metal material, and the upper end of the positioning cylinder is a thin-walled positioning part, the outer wall of the positioning part is recessed inwardly to form an annular convex part on the inner wall of the positioning part, and the annular convex part is coaxially arranged with the positioning cylinder; there is an annular gap between the positioning cylinder and the cable, epoxy resin is poured in the annular gap, and the upper side of the epoxy resin extends to the positioning part.

[0007] Epoxy resin is potted inside the positioning cylinder, which not only forms a very reliable and stable seal between the positioning cylinder and the cable, but also makes the positioning cylinder and the cable form an integral whole, preventing the cable from moving when being pulled, thus avoiding the separation of the cable from the motor winding wire package and ensuring the stable operation of the motor.

[0008] Meanwhile, an annular convex portion is formed on the inner wall of the thin-walled positioning portion to form a blockage in the axial direction of the positioning cylinder, effectively strengthening the reliability of the combination of the epoxy resin and the positioning cylinder, thereby further avoiding the movement of the cable when being pulled and enhancing the working and structural stability of this sealing structure.

[0009] In the above-mentioned cable extending sealing structure of the pump motor, the axial cross-section of the above-mentioned annular convex portion is arc-shaped. On the premise of stably forming axial limit, it also enables the epoxy resin to flow smoothly, ensuring that the epoxy resin evenly fills the positioning cylinder.

[0010] In the above-mentioned cable extending sealing structure of the pump motor, there are at least two annular convex portions distributed along the axial direction of the positioning cylinder to further enhance the axial positioning effect.

[0011] In the above-mentioned cable extending sealing structure of the pump motor, a seal is formed between the positioning cylinder and the inner wall of the wire passing hole through a sealing ring.

[0012] In the above-mentioned cable extending sealing structure of the pump motor, an annular limiting seat is formed on the inner wall of the wire passing hole. The sealing ring is sleeved outside the cable, and the two end faces of the sealing ring are respectively pressed tightly against the top surface of the limiting seat and the bottom surface of the positioning cylinder. The sealing ring is clamped between the positioning cylinder and the limiting seat, which can effectively enhance the sealing strength formed between the two.

[0013] In the above-mentioned cable extending sealing structure of the pump motor, the inner side wall of the sealing ring is attached to the outer side wall of the cable to close the lower port of the positioning cylinder, prevent the leakage of epoxy resin during potting, and facilitate processing and assembly.

[0014] In the above-mentioned cable extending sealing structure of the pump motor, the positioning cylinder is screwed into the wire passing hole to facilitate assembly.

[0015] In the above-mentioned cable extending sealing structure of the pump motor, the top surface of the limiting seat is connected to the inner side surface of the wire passing hole through a first conical surface, and the diameter of the first conical surface gradually decreases from top to bottom. The outer side surface of the sealing ring is a second conical surface matching the first conical surface, and the first conical surface and the second conical surface are in contact with each other. The cooperation of the first conical surface and the second conical surface is used to forcibly correct the position of the sealing ring and improve the installation accuracy of the positioning cylinder.

[0016] In the above-mentioned cable extending sealing structure of the pump motor, the positioning cylinder is made of stainless steel material.

[0017] In the above-mentioned cable extending sealing structure of the pump motor, the positioning cylinder is made of spring steel material.

[0018] Compared with the prior art, the cable extending and sealing structure of the pump motor has the following advantages:

[0019] 1. Epoxy resin is potted in the positioning cylinder, which not only forms a very reliable and stable seal between the positioning cylinder and the cable, but also makes the positioning cylinder and the cable form an integral body, preventing the cable from moving when being pulled, thus avoiding the separation of the cable from the motor winding wire package and ensuring the stable operation of the motor.

[0020] 2. An annular convex portion is formed on the inner wall of the thin-walled positioning portion to form a block in the axial direction of the positioning cylinder, effectively strengthening the reliability of the combination of the epoxy resin and the positioning cylinder, thereby further preventing the cable from moving when being pulled and enhancing the working and structural stability of this sealing structure. Description of the Drawings

[0021] Figure 1 is a schematic structural diagram of the pump motor.

[0022] Figure 2 is Figure 1 an enlarged schematic diagram of part A in

[0023] Figure 3 is a schematic structural diagram of the positioning cylinder.

[0024] In the figure, 1. Top cover; 1a. Wire passing hole; 1b. Limit seat; 2. Positioning cylinder; 2a. Positioning portion; 2b. Annular convex portion; 3. Epoxy resin; 4. Sealing ring; 4a. Second conical surface; 5. Cable. Detailed Embodiment

[0025] The following are specific embodiments of the present invention and in combination with the drawings, the technical solutions of the present invention will be further described, but the present invention is not limited to these embodiments.

[0026] As Figure 1 shown, in the cable extending and sealing structure of the pump motor, the motor includes a top cover 1, and a wire passing hole 1a vertically penetrating through the top cover 1 for the cable 5 to pass through; the sealing structure includes a positioning cylinder 2 vertically fixed in the wire passing hole 1a, and both ends of the positioning cylinder 2 are open.

[0027] Specifically,

[0028] As Figures 1 to 3As shown in the figure, the positioning cylinder 2 is sleeved outside the cable 5, and a seal is formed between the outer wall of the positioning cylinder 2 and the inner wall of the wire passing hole 1a. The positioning cylinder 2 is made of an elastic metal material. The upper end of the positioning cylinder 2 is a thin-walled positioning portion 2a. The outer wall of the positioning portion 2a is recessed inward to form an annular convex portion 2b on the inner wall of the positioning portion 2a, and the annular convex portion 2b is coaxially arranged with the positioning cylinder 2. There is an annular gap between the positioning cylinder 2 and the cable 5. The annular gap is coaxially arranged with the positioning cylinder 2. The annular gap is filled with epoxy resin 3, and the upper side of the epoxy resin 3 extends to the positioning portion 2a.

[0029] Pouring epoxy resin 3 into the positioning cylinder 2 not only forms a very reliable and stable seal between the positioning cylinder 2 and the cable 5, but also makes the positioning cylinder 2 and the cable 5 form an integral body, preventing the cable 5 from moving when being pulled, thereby avoiding the separation of the cable 5 from the motor winding wire package and ensuring the stable operation of the motor.

[0030] At the same time, an annular convex portion 2b is formed on the inner wall of the thin-walled positioning portion 2a to form a block in the axial direction of the positioning cylinder 2, effectively strengthening the reliability of the combination of the epoxy resin 3 and the positioning cylinder 2, thereby further preventing the cable 5 from moving when being pulled and strengthening the working and structural stability of this sealing structure.

[0031] Preferably, the axial cross-section of the annular convex portion 2b is arc-shaped. On the premise of stably forming axial limitation, the epoxy resin 3 can flow smoothly, ensuring that the epoxy resin 3 uniformly fills the positioning cylinder 2. There are at least two annular convex portions 2b and they are distributed along the axial direction of the positioning cylinder 2 to further strengthen the axial positioning effect. In the actual product, the number of the annular convex portions 2b is 2.

[0032] In this embodiment,

[0033] The positioning cylinder 2 is made of stainless steel material or spring steel material, and preferably the positioning cylinder 2 is made of stainless steel material.

[0034] As Figure 2 As shown in the figure, a seal is formed between the positioning cylinder 2 and the inner wall of the wire passing hole 1a through the sealing ring 4. Specifically, an annular limiting seat 1b is formed on the inner wall of the wire passing hole 1a. The limiting seat 1b is coaxially arranged with the wire passing hole 1a, and the limiting seat 1b and the top cover 1 are of an integral structure. At this time, the sealing ring 4 is sleeved outside the cable 5, and the two end faces of the sealing ring 4 are respectively tightly pressed on the top surface of the limiting seat 1b and the bottom surface of the positioning cylinder 2. The sealing ring 4 is clamped between the positioning cylinder 2 and the limiting seat 1b, which can effectively strengthen the sealing strength formed between the two. Further explanation, the inner side wall of the sealing ring 4 is attached to the outer side wall of the cable 5 to close the lower port of the positioning cylinder 2, preventing the epoxy resin 3 from leaking during pouring, and facilitating processing and assembly.

[0035] Further, the top surface of the limit seat 1b is transitionally connected to the inner side surface of the wire passing hole 1a through the first conical surface, and the diameter of the first conical surface gradually decreases from top to bottom. The outer side surface of the sealing ring 4 is the second conical surface 4a matching the first conical surface, and the first conical surface and the second conical surface 4a are in abutment. The cooperation of the first conical surface and the second conical surface 4a is used to forcibly correct the position of the sealing ring 4 and improve the installation accuracy of the positioning cylinder 2.

[0036] In the actual product, the positioning cylinder 2 is screwed in the wire passing hole 1a for convenient assembly. Naturally, clamping the positioning cylinder 2 in the wire passing hole 1a can also stably position the positioning cylinder 2 in the wire passing hole 1a.

[0037] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art to which the present invention pertains can make various modifications or supplements to the described specific embodiments or use similar ways for substitution, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. Sealing structure for the cable extending out of the motor for the pump. The motor includes a top cover (1), and a wire passing hole (1a) through which a cable (5) passes vertically is provided on the top cover (1). It is characterized in that, This sealing structure includes a positioning cylinder (2) vertically fixed in the wire passing hole (1a). The positioning cylinder (2) is sleeved outside the cable (5), and a seal is formed between the outer wall of the positioning cylinder (2) and the inner wall of the wire passing hole (1a). The positioning cylinder (2) is made of an elastic metal material. The upper end of the positioning cylinder (2) is a positioning portion (2a) in the shape of a thin wall. The outer wall of the positioning portion (2a) is recessed inward to form an annular convex portion (2b) on the inner wall of the positioning portion (2a), and the annular convex portion (2b) is coaxially arranged with the positioning cylinder (2). There is an annular gap between the positioning cylinder (2) and the cable (5), and the annular gap is filled with epoxy resin (3), and the upper side of the epoxy resin (3) extends to the positioning portion (2a).

2. The pump motor cable extension sealing structure according to claim 1, characterized in that, The axial cross-section of the above-mentioned annular convex portion (2b) is arc-shaped.

3. The pump motor cable extending sealing structure according to claim 1 or 2, characterized in that, There are at least two annular convex portions (2b) and they are distributed along the axial direction of the positioning cylinder (2).

4. The pump motor cable extending sealing structure according to claim 1, characterized in that A seal is formed between the positioning cylinder (2) and the inner wall of the wire passing hole (1a) through a sealing ring (4).

5. The pump motor cable extending sealing structure according to claim 4, characterized in that, An annular limit seat (1b) is formed on the inner wall of the wire passing hole (1a). The sealing ring (4) is sleeved outside the cable (5), and the two end faces of the sealing ring (4) are respectively pressed tightly against the top surface of the limit seat (1b) and the bottom surface of the positioning cylinder (2).

6. The pump motor cable extending sealing structure according to claim 5, characterized in that, The inner side wall of the sealing ring (4) is attached to the outer side wall of the cable (5).

7. The pump motor cable extending sealing structure according to claim 1, characterized in that, The positioning cylinder (2) is screwed into the wire passing hole (1a).

8. The pump motor cable extension sealing structure according to claim 7, characterized in that, The top surface of the limit seat (1b) is transitionally connected to the inner side surface of the wire passing hole (1a) through a first conical surface, and the diameter of the first conical surface gradually decreases from top to bottom. The outer side surface of the sealing ring (4) is a second conical surface (4a) matching the first conical surface, and the first conical surface and the second conical surface (4a) are in contact with each other.

9. The pump motor cable extending sealing structure according to claim 1, characterized in that, The positioning cylinder (2) is made of stainless steel material.

10. The pump motor cable extension sealing structure according to claim 1, characterized in that, The positioning cylinder (2) is made of spring steel material.

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