A self-pressure waterproof motor

Abstract

The present invention discloses a self-pressure waterproof motor including a motor (1) and a sealing ring (2). The motor (1) includes a housing (1‑1) and an output shaft (1‑2). The housing (1‑1) is provided with a large circular groove (A) and a small circular groove (B). A hole (C) is drilled on the end face of the housing (1‑1), and the hole (C) is connected to the small groove (B). The sealing ring (2) is placed in the large groove (A). When in use, liquid enters the end face of the housing (1‑1), enters the small groove (B) along the hole (C), and is then pressed on the sealing ring (2), causing the elastic sealing ring (2) to produce elastic deformation, and the protruding position on the sealing ring (2) produces a pressure F on the output shaft (1‑2). 2 ; The total pressure on the output shaft (1-2) is F = F 1 +F 2 . Due to F 1 F on existing products 1 The total pressure F is smaller, the energy consumed by the motor (1) is reduced, and the use cost is reduced.

Description

1. Technical field:

[0002] The present invention relates to an electric motor as a motive force. 2. Background technology:

[0004] When the existing motor is used for hydraulic power output, there is a sealing ring at the output shaft. Because when designing the sealing ring, the maximum load (i.e. the maximum liquid pressure) is used to determine the pressing force of the sealing ring plus a certain insurance factor. In this way, the calculated pressing force is relatively large, so the friction resistance is also relatively large, and the power consumption of the motor is also relatively large; in addition, the sealing ring is greatly worn, and the subsequent maintenance cost is relatively high, so the cost of using the motor is high. 3. Summary of the invention:

[0005] The problem to be solved by the present invention is: adopting a new method, so that the sealing ring can ensure that the external liquid does not flow into the motor on the one hand, and on the other hand, the motor power consumption is small, the sealing ring wear is small, the subsequent maintenance cost is relatively low, and the motor use cost is low.

[0006] In order to solve the above problems, the working principle of a self-pressure waterproof motor of the present invention is as follows: reduce the preload force of the sealing ring; drill a hole on the motor housing, which is connected to the sealing ring; let the liquid with a certain pressure outside flow in from the hole drilled on the housing and contact the sealing ring, so that the pressure applied by the sealing ring on the motor is the sum of the pressure of the liquid and the relatively small preload force of the sealing ring; when the liquid is relatively small, the force applied by the sealing ring on the motor output shaft is relatively small, which also ensures that the liquid will not leak into the motor. In addition, the friction force on the motor is also small, and the power consumed is also relatively small. When the liquid pressure is relatively large, the force applied by the sealing ring on the motor output shaft is relatively large, which also ensures that the liquid will not leak into the motor.

[0007] After adopting the above method, the total power consumption of the motor during use will be reduced and the cost of use will be reduced. 4. Description of the drawings:

[0008] Attached Figure 1 It is a partial structural diagram of a first embodiment of a self-pressure waterproof motor of the present invention;

[0009] Attached Figure 2 It is a partial structural diagram of a second embodiment of a self-pressure waterproof motor of the present invention; V. Specific implementation methods:

[0010] In the attached Figure 1 To Attachment Figure 2In the first embodiment shown, a self-pressure waterproof motor of the present invention comprises a motor (1) and a sealing ring (2), wherein the motor (1) comprises a housing (1-1) and an output shaft (1-2), wherein the housing (1-1) is provided with a large circular groove (A) and a small circular groove (B), and a hole (C) is drilled on the end surface of the housing (1-1), wherein the hole (C) communicates with the small groove (B). The sealing ring (2) is placed in the large groove (A). The preload F of the sealing ring (2) is 1 The pre-pressure is smaller than that of the original structure. During use, when liquid with a certain pressure enters the end face of the housing (1-1), the liquid with a certain pressure enters the small groove (B) along the hole (C) and then presses on the sealing ring (2). The elastic sealing ring (2) is elastically deformed, and the protruding position on the sealing ring (2) generates a pressure F on the output shaft (1-2). 2 At this time, the output shaft (1-2) is subjected to the preload F generated by the sealing ring (2). 1 On the other hand, F 2 The output shaft (1-2) is subjected to a total pressure of F = F 1 +F 2 . Due to F 1 F on existing products 1 Therefore, the total pressure F is small, the friction force on the output shaft is reduced, the energy consumed by the motor (1) is reduced, and the use cost is reduced.

[0011] In the attached Figure 2 The second embodiment shown is different from the first embodiment in that the sealing ring (2) is hollow in the middle. The portion of the sealing ring (2) squeezed by the liquid is relatively thin. Thus, the protruding portion of the sealing ring (2) generates a pushing force F on the output shaft (1-2). 2 The energy consumed by the motor (1) is less than that of the first embodiment, and the use cost is further reduced.

[0012] The present invention can be used not only when the liquid is water, but also when other liquids are used, which is also the content of the present invention.

Claims

1. A self-pressure waterproof motor comprises an output shaft (1-2) and a sealing ring (2), wherein the sealing ring (2) is arranged in a large groove (A) opened in a housing (1-1), and the output shaft (1-2) is arranged in the motor (1), characterized in that: A hole (C) is drilled on the end surface of the housing (1-1), and a circular small groove (B) is opened on the housing (1-1), and the hole (C) is communicated with the small groove (B); the sealing ring (2) has a certain pre-pressure F1; after the liquid enters the small groove (B) from the hole (C) of the housing (1-1), it also generates a certain pressure F2 on the output shaft (1-2); these two pressures both generate resistance to the rotation of the output shaft (1-2), because F2 changes with the pressure of the liquid; when it is relatively small, the resistance generated by the output shaft (1-2) is relatively small, thereby achieving the purpose of reducing the energy consumed by the motor (1) and low cost of use.

2. A self-pressure waterproof motor according to claim 1, characterized in that: The sealing ring (2) is hollow; the hollow position is communicated with the small groove (B).

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