Novel submersible pump sealing structure

Abstract

The utility model discloses a novel submersible pump sealing structure, which comprises a pump cover and a pump body, the radial connecting surface and the axial connecting surface of the pump cover and the pump body are respectively matched and clung to each other, and an annular sealing groove with an arc-shaped section is arranged at the connecting corner between the radial connecting surface and the axial connecting surface of the pump cover. A special-shaped sealing ring is extruded in the annular sealing groove and comprises a center sealing ring and at least four sealing edges evenly distributed in the circumferential direction of the center sealing ring. A traditional O-shaped sealing ring is changed into the special-shaped sealing ring with better sealing performance, the sealing edge feet of the special-shaped sealing ring can play a role in axial and radial sealing, a better sealing effect is achieved, the hidden danger that the sealing edge feet are cut off does not exist, the friction force is low, the torque resistance capacity is good, and the special-shaped sealing ring is small in leakage and long in service life. The special-shaped sealing ring can be filled with lubricating oil in the working state, and a good lubricating condition is provided.

Description

Technical Field

[0001] This utility model relates to the field of sealing structure technology, and in particular to a novel submersible pump sealing structure. Background Technology

[0002] Existing submersible pump sealing structures typically employ O-ring seals. Traditional O-ring seal structures usually come in two forms: one is a radial seal, such as... Figure 1 As shown, one type is an axial seal, such as... Figure 2 As shown. Both of these sealing methods have high dynamic friction resistance; one lacks axial sealing, and the other lacks radial sealing, making it difficult to achieve a complete seal. Furthermore, both methods require placing the O-ring into a pre-machined rectangular groove. Due to the design and manufacturing difficulties of the rectangular groove, the fit between the sealing ring and the groove may not be tight enough, thus affecting the sealing effect.

[0003] Meanwhile, traditional O-ring sealing structures, due to the need for close contact with the sealed surface during the sealing process, are at risk of being cut off. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model designs a novel submersible pump sealing structure.

[0005] The present invention adopts the following technical solution:

[0006] A novel submersible pump sealing structure includes a pump cover and a pump body. After the pump cover and pump body are connected, their radial and axial connecting surfaces fit together tightly. An annular sealing groove with a circular arc cross-section is provided at the corner between the radial and axial connecting surfaces of the pump cover. An irregularly shaped sealing ring is extruded in the annular sealing groove. The irregularly shaped sealing ring includes a central sealing ring and sealing edges evenly distributed along the circumference of the central sealing ring. The number of sealing edges is at least four.

[0007] Preferably, the number of sealing edges is four, and the cross-section of the irregular sealing ring is cross-shaped.

[0008] Preferably, the arc angle of the sealing groove is 270 degrees.

[0009] Preferably, the corners between the radial connecting surface and the axial connecting surface of the pump body are rounded.

[0010] The beneficial effects of this utility model are: (1) This utility model replaces the traditional O-ring seal with a shaped seal with better sealing performance. The sealing edge of the shaped seal can achieve axial and radial sealing, thus achieving a better sealing effect. There is no risk of it being cut off. It also has lower friction and better torque resistance. The shaped seal has less leakage and a longer service life. (2) The shaped seal has better lubrication conditions. The shaped seal will be filled with lubricating oil in the working state, providing good lubrication conditions. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of a traditional O-ring seal structure for radial sealing;

[0012] Figure 2 This is a schematic diagram of a traditional O-ring seal structure for axial sealing;

[0013] Figure 3 This is a schematic diagram of the structure of this utility model;

[0014] Figure 4 This is a schematic diagram of the structure of this utility model after compression and sealing;

[0015] In the diagram: 1. Pump cover, 2. Pump body, 3. Sealing groove, 4. Irregular sealing ring. Detailed Implementation

[0016] The technical solution of this utility model will be further described in detail below through specific embodiments and with reference to the accompanying drawings:

[0017] Example: As attached Figure 1 As shown, a novel submersible pump sealing structure includes a pump cover 1 and a pump body 2. After the pump cover and pump body are connected, the radial connecting surfaces and axial connecting surfaces of the pump cover and pump body fit together tightly. An annular sealing groove 3 with a circular arc cross-section is provided at the corner between the radial connecting surface and the axial connecting surface of the pump cover. An irregular sealing ring 4 is squeezed in the annular sealing groove. The irregular sealing ring includes a central sealing ring and four sealing edges evenly distributed along the circumference of the central sealing ring. The cross-section of the irregular sealing ring is cross-shaped.

[0018] The arc angle of the sealing groove is 270 degrees. The corners between the radial and axial connecting surfaces of the pump body are rounded.

[0019] This invention replaces the traditional O-ring with a non-circular shaped sealing ring, which offers better sealing performance. The sealing edges of the non-circular shaped sealing ring can provide axial and radial sealing, achieving a better sealing effect. It eliminates the risk of being cut off and has lower friction and better torque resistance. The non-circular shaped sealing ring has less leakage and a longer service life. It also provides better lubrication conditions, as it is filled with lubricating oil during operation.

[0020] The embodiments described above are merely preferred solutions of this utility model and are not intended to limit this utility model in any way. Other variations and modifications are possible without departing from the technical solutions described in the claims.

Claims

1. A novel submersible pump sealing structure, comprising a pump cover and a pump body, wherein after the pump cover and pump body are connected, the radial connecting surfaces and the axial connecting surfaces of the pump cover and pump body respectively fit tightly against each other, characterized in that, An annular sealing groove with a circular arc cross-section is provided at the corner between the radial connecting surface and the axial connecting surface of the pump cover. An irregular sealing ring is extruded in the annular sealing groove. The irregular sealing ring includes a central sealing ring and sealing feet evenly distributed along the circumference of the central sealing ring. The number of sealing feet is at least four.

2. The novel submersible pump sealing structure according to claim 1, characterized in that, The number of sealing edges is four, and the cross-section of the irregular sealing ring is cross-shaped.

3. The novel submersible pump sealing structure according to claim 1, characterized in that, The arc angle of the sealing groove is 270 degrees.

4. The novel submersible pump sealing structure according to claim 1, characterized in that, The corners between the radial and axial connecting surfaces of the pump body are rounded.

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