Mechanical sealing structure for oil pump

Abstract

The mechanical sealing structure for the oil pump comprises a sealing mechanism, a leakage-proof mechanism and a pressing mechanism, the sealing mechanism comprises a transmission shaft, a static sealing sleeve movably connected to the outer side of the transmission shaft in a sleeved mode, a movable sealing sleeve connected to the outer side of the transmission shaft in a sleeved mode and the leakage-proof mechanism, the anti-leakage mechanism comprises a curved surface arranged in the static sealing sleeve, a bulge integrally formed with the movable sealing sleeve, and a pressing mechanism, the curved surface is in interference fit with the bulge, and the pressing mechanism comprises two elastic rings clamped with the static sealing sleeve and the movable sealing sleeve. In the utility model, the dynamic sealing sleeve is in close contact with the static sealing sleeve, then the spring extrudes the dynamic sealing sleeve to stabilize the sealing surface, and then the curved surface is matched with the bulge to form a labyrinth type leakage path, so that the fluid leakage path is prolonged, the leakage difficulty is increased, and the sealing effect is effectively guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of mechanical seal technology for oil pumps, specifically to a mechanical seal structure for oil pumps. Background Technology

[0002] The oil pump is a lightweight and compact pump having an oil pump housing made of an aluminum-containing material and a movable molded part disposed in the housing, wherein the movable molded part is at least partially made of a sinterable iron-based alloy material containing at least one austenitic material, and wherein the molded part made of a sinterable material has a coefficient of thermal expansion of at least 60% of the coefficient of thermal expansion of the housing.

[0003] Traditional electric oil pumps use packing seals, which have a large leakage rate. After the oil leaks out, the ground around the pump base becomes slippery and dirty, posing a risk of slipping and falling to personnel. This causes inconvenience to workers in the work environment. Moreover, the packing needs to be maintained and replaced frequently, making the sealing structure very inconvenient to use. Utility Model Content

[0004] This utility model aims to solve one of the technical problems existing in the prior art or related technologies.

[0005] Therefore, the technical solution adopted by this utility model is as follows:

[0006] A mechanical seal structure for an oil pump includes a sealing mechanism, a leak-proof mechanism, and a clamping mechanism. The sealing mechanism includes a drive shaft, a static sealing sleeve movably sleeved on the outside of the drive shaft, and a dynamic sealing sleeve sleeved on the outside of the drive shaft. The leak-proof mechanism includes a curved surface disposed inside the static sealing sleeve and a protrusion integrally formed with the dynamic sealing sleeve, the curved surface and the protrusion being press-fitted together. The clamping mechanism includes two elastic circles engaging with the static sealing sleeve and the dynamic sealing sleeve, and a spring movably sleeved on the outside of the drive shaft and connected to the dynamic sealing sleeve.

[0007] By adopting the above technical solution, the dynamic sealing sleeve and the static sealing sleeve are in close contact. Then, the spring compresses the dynamic sealing sleeve to stabilize the sealing surface. Then, the curved surface fits the protrusion to form a "maze-like" leakage path. This prolongs the fluid leakage path, increases the leakage difficulty, and effectively ensures the sealing effect.

[0008] In a preferred embodiment, the present invention can be further configured such that both the static sealing sleeve and the dynamic sealing sleeve are T-shaped, and the outer edge of the outer end of the static sealing sleeve is an arc surface.

[0009] In a preferred embodiment, the present invention can be further configured such that a sealing surface is formed at the contact point between the curved surface and the protrusion.

[0010] In a preferred embodiment, the present invention can be further configured such that two clamps are snapped onto the outer sides of both the static sealing sleeve and the dynamic sealing sleeve, and the diameter of the clamps is equal to the outer diameter of the static sealing sleeve.

[0011] In a preferred embodiment, the present invention can be further configured such that both the static sealing sleeve and the dynamic sealing sleeve are made of rubber material, and the elastic circle is made of the same material as the static sealing sleeve.

[0012] By adopting the above technical solution, the beneficial effects achieved by this utility model are as follows:

[0013] 1. In this utility model, the dynamic sealing sleeve and the static sealing sleeve are in close contact. Then, the spring compresses the dynamic sealing sleeve to stabilize the sealing surface. Then, the curved surface fits the protrusion to form a "maze-like" leakage path. This prolongs the fluid leakage path, increases the leakage difficulty, and effectively ensures the sealing effect.

[0014] 2. In this utility model, the drive shaft, static seal sleeve, and dynamic seal sleeve are all installed inside the reducer housing. Here, the drive shaft passes through the reducer housing, and the outer wall of the static seal sleeve is fixed to the inner wall of the reducer housing, while the static seal sleeve fits snugly against the inner wall of the reducer housing. Then, under the pressure of the clamps, the static seal sleeve and dynamic seal sleeve fit tightly together, effectively preventing the need for replacement of the static seal sleeve and dynamic seal sleeve. Attached Figure Description

[0015] Figure 1 This is a perspective view of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the sealing mechanism of this utility model;

[0017] Figure 3 This is a schematic diagram of the leak-proof mechanism of this utility model;

[0018] Figure 4 This is a schematic diagram of the clamping mechanism of this utility model.

[0019] Figure label:

[0020] 100. Sealing mechanism; 110. Drive shaft; 120. Static sealing sleeve; 130. Dynamic sealing sleeve;

[0021] 200. Leakage prevention mechanism; 210. Curved surface; 220. Protrusion;

[0022] 300. Clamping mechanism; 310. Elastic ring; 320. Spring;

[0023] 400. Clamps. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features of the present utility model can be combined with each other.

[0025] It should be understood that these descriptions are merely exemplary and are not intended to limit the scope of this invention.

[0026] The mechanical seal structure for an oil pump provided by some embodiments of the present invention is described below with reference to the accompanying drawings.

[0027] Example 1:

[0028] Combination Figure 1-4 As shown, the present invention provides a mechanical seal structure for an oil pump, including a sealing mechanism 100, a leak-proof mechanism 200, and a pressing mechanism 300. The sealing mechanism 100 includes a drive shaft 110, a static sealing sleeve 120 movably sleeved on the outside of the drive shaft 110, and a dynamic sealing sleeve 130 sleeved on the outside of the drive shaft 110.

[0029] Leakage prevention mechanism 200, the leakage prevention mechanism 200 includes a curved surface 210 disposed inside the static sealing sleeve 120 and a protrusion 220 integrally formed with the dynamic sealing sleeve 130, the curved surface 210 and the protrusion 220 being press-fitted together;

[0030] The clamping mechanism 300 includes two elastic circles 310 that engage with the static sealing sleeve 120 and the dynamic sealing sleeve 130, and a spring 320 that is movably sleeved on the outside of the drive shaft 110 and connected to the dynamic sealing sleeve 130.

[0031] Furthermore, both the static sealing sleeve 120 and the dynamic sealing sleeve 130 are T-shaped, and the outer edge of the outer end of the static sealing sleeve 120 is an arc surface. The arc surface allows the static sealing sleeve 120 to fit tightly against the inner wall of the reducer housing.

[0032] Furthermore, a sealing surface is formed at the contact point between the curved surface 210 and the protrusion 220, which increases the difficulty of fluid leakage.

[0033] Example 2:

[0034] Combination Figure 1 As shown, based on Embodiment 1, two clamps 400 are snapped onto the outer sides of both the static sealing sleeve 120 and the dynamic sealing sleeve 130. The diameter of the clamps 400 is equal to the outer diameter of the static sealing sleeve 120. The clamps 400 can improve the installation firmness of the static sealing sleeve 120 and the dynamic sealing sleeve 130.

[0035] Example 3:

[0036] Combination Figure 1 and Figure 4 As shown, in the above embodiment, the static sealing sleeve 120 and the dynamic sealing sleeve 130 are both made of rubber material, and the elastic circle 310 is made of the same material as the static sealing sleeve 120. This structural design reduces the difficulty of material selection when manufacturing the static sealing sleeve 120, the dynamic sealing sleeve 130, and the elastic circle 310.

[0037] The working principle and usage process of this utility model are as follows: In the initial state, the drive shaft 110, the static sealing sleeve 120, and the dynamic sealing sleeve 130 are all installed inside the reducer housing. Here, the drive shaft 110 passes through the reducer housing, and the outer wall of the static sealing sleeve 120 is fixed to the inner wall of the reducer housing. The static sealing sleeve 120 is in close contact with the inner wall of the reducer housing. When the device is put into actual use, the dynamic sealing sleeve 130 is in close contact with the static sealing sleeve 120. Then, the spring 320 compresses the dynamic sealing sleeve 130 to stabilize the sealing surface. Then, the curved surface 210 and the protrusion 220 fit together to form a "maze-like" leakage path. This prolongs the fluid leakage path, increases the leakage difficulty, and effectively ensures the sealing effect.

[0038] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A mechanical seal structure for an oil pump, characterized in that, include: A sealing mechanism (100) includes a drive shaft (110), a static sealing sleeve (120) movably sleeved on the outside of the drive shaft (110), and a dynamic sealing sleeve (130) sleeved on the outside of the drive shaft (110). Leakage prevention mechanism (200), the leakage prevention mechanism (200) includes a curved surface (210) disposed inside the static sealing sleeve (120) and a protrusion (220) integrally formed with the dynamic sealing sleeve (130), the curved surface (210) and the protrusion (220) are press-fitted together; The clamping mechanism (300) includes two elastic rings (310) that engage with the static sealing sleeve (120) and the dynamic sealing sleeve (130), and a spring (320) that is movably sleeved on the outside of the drive shaft (110) and connected to the dynamic sealing sleeve (130).

2. The mechanical seal structure for an oil pump according to claim 1, characterized in that, Both the static sealing sleeve (120) and the dynamic sealing sleeve (130) are T-shaped, and the outer edge of the outer end of the static sealing sleeve (120) is an arc surface.

3. The mechanical seal structure for an oil pump according to claim 1, characterized in that, A sealing surface is formed at the contact point between the curved surface (210) and the protrusion (220).

4. The mechanical seal structure for an oil pump according to claim 1, characterized in that, Both the static sealing sleeve (120) and the dynamic sealing sleeve (130) are secured with two clamps (400) on their outer sides, and the diameter of the clamps (400) is equal to the outer diameter of the static sealing sleeve (120).

5. The mechanical seal structure for an oil pump according to claim 1, characterized in that, The static sealing sleeve (120) and the dynamic sealing sleeve (130) are both made of rubber material, and the elastic circle (310) is made of the same material as the static sealing sleeve (120).

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