Rotary cooling and lubricating structure of pump

Abstract

The utility model belongs to the technical field of water pumps, and relates to a rotary cooling and lubricating structure of a pump, which comprises a pump body and a shaft, a lower bearing seat and an oil cylinder cover are arranged in the pump body, a bearing and a mechanical seal are arranged between the lower bearing seat and the shaft, and the oil cylinder cover is arranged below the lower bearing seat. An oil cavity for containing lubricating oil is formed between the lower bearing seat and the oil cylinder cover, the lower bearing seat opposite to the mechanical seal is provided with a spiral drainage rail and a lubricating hole, and when the shaft rotates, the lubricating oil is guided by the spiral drainage rail to spirally rise to a friction pair of a dynamic ring and a static ring of the mechanical seal and then flows back to the oil cavity through the lubricating hole. The rotary cooling and lubricating structure of the pump can effectively improve the lubricity and the heat dissipation performance of the mechanical seal.

Description

Technical Field

[0001] The utility model belongs to the technical field of water pumps and relates to a rotating cooling and lubricating structure of a pump. Background Art

[0002] In a general pump structure, there is a cavity between the lower bearing seat and the oil cylinder cover, and mechanical oil for lubrication purposes is filled inside this cavity. Due to the limitations of atmospheric pressure and structure, the dynamic ring and static ring of the mechanical seal are above the highest oil level. When the motor rotates, the mechanical seal stirs a part of the lubricating oil due to rotation, and this part of the lubricating oil can only lubricate the mechanical seal in a splashing manner. Therefore, the mechanical seal cannot be effectively lubricated. After the pump runs for a long time, the mechanical seal will fail due to insufficient lubrication and heat dissipation. Content of the Utility Model

[0003] Aiming at the deficiencies of the prior art, the utility model provides a rotating cooling and lubricating structure of a pump, which can effectively improve the lubricity and heat dissipation performance of the mechanical seal.

[0004] To solve the above technical problems, the purpose of the utility model is achieved through the following technical solutions:

[0005] A rotating cooling and lubricating structure of a pump includes a pump body and a shaft. A lower bearing seat and an oil cylinder cover are arranged inside the pump body. A bearing and a mechanical seal are arranged between the lower bearing seat and the shaft. The oil cylinder cover is arranged below the lower bearing seat, and an oil cavity for containing lubricating oil is formed between the lower bearing seat and the oil cylinder cover. A spiral drainage track and a lubricating hole are arranged on the lower bearing seat opposite to the mechanical seal. When the shaft rotates, the lubricating oil is guided by the spiral drainage track to spiral upwards to the friction pair of the dynamic and static rings of the mechanical seal, and then flows back to the oil cavity through the lubricating hole.

[0006] In the above-mentioned rotating cooling and lubricating structure of a pump, the lower end of the spiral drainage track is lower than the highest oil level, and the upper end is higher than the highest oil level; the inlet of the lubricating hole is higher than the highest oil level, and the outlet is lower than the highest oil level; the inlet of the lubricating hole is located above the spiral drainage track.

[0007] In the above-mentioned rotating cooling and lubricating structure of a pump, a drainage ring extending below the highest oil level is coaxially arranged at the lower end of the lower bearing seat. The spiral drainage track is arranged on the inner wall of the drainage ring, and the lubricating hole penetrates through the drainage ring. Preferably, the lower end surface of the drainage ring extends beyond the lower end surface of the mechanical seal.

[0008] In the above-mentioned rotating cooling and lubricating structure of a pump, a return convex block is arranged on the outer wall of the drainage ring. The lubricating hole penetrates through the return convex block obliquely outwards from top to bottom; the axis of the lubricating hole is a straight line.

[0009] In the above-mentioned rotary cooling and lubricating structure of a pump, the spiral drainage track protrudes from the inner wall of the drainage ring and there is a gap between it and the mechanical seal.

[0010] In the above-mentioned rotary cooling and lubricating structure of a pump, the upper end of the return bump is integrally connected with the lower end of the lower bearing seat, and the lower end of the return bump is provided with an inclined surface that inclines inwards from top to bottom.

[0011] In the above-mentioned rotary cooling and lubricating structure of a pump, a number of radially distributed strengthening plates are provided on the outer wall of the drainage ring, and the strengthening plates are integrally connected with the lower end surface of the lower bearing seat.

[0012] In the above-mentioned rotary cooling and lubricating structure of a pump, the lower bearing seat, the drainage ring, the spiral drainage track, the return bump and the strengthening plate are integrally formed.

[0013] In the above-mentioned rotary cooling and lubricating structure of a pump, there are two or more spiral drainage tracks and lubricating holes, and they are arranged in one-to-one correspondence and are evenly distributed along the circumferential direction.

[0014] In the above-mentioned rotary cooling and lubricating structure of a pump, the curve of the spiral drainage track is adapted to the specifications of the pump. Through simulation software (such as SOLIDWORKS SIMULATION), finite element analysis can be applied to find the optimal drainage track curve so that the lubricating oil can be lubricated and circulated smoothly.

[0015] Compared with the prior art, the present utility model has the following beneficial effects:

[0016] The present utility model provides a rotary cooling and lubricating structure of a pump. When the motor drive shaft rotates, the lubricating oil in the oil chamber will move along the spiral drainage track, then be discharged from the lubricating hole, enter the oil chamber, and circulate repeatedly. Through the cyclic transportation of the spiral drainage track and the lubricating hole, the lubricating oil can reach above its highest oil level to lubricate the mechanical seal, thereby improving the lubricity and heat dissipation performance of the mechanical seal. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a cross-sectional view of the present utility model;

[0018] Figure 2 is a perspective view of the lower bearing seat of the present utility model;

[0019] Figure 3 is Figure 2 the axial cross-sectional view of;

[0020] Figure 4 is the drainage schematic diagram of the spiral drainage track of the present utility model;

[0021] Reference numerals: 1, pump body; 2, shaft; 3, lower bearing seat; 4, oil cylinder cover; 5, bearing; 6, mechanical seal; 7, oil chamber; 8, spiral drainage track; 9, lubrication hole; 10, highest oil level; 11, drainage ring; 12, return bump; 13, reinforcement plate. Detailed implementation manners

[0022] The following further describes the present utility model with specific embodiments in conjunction with the accompanying drawings. Refer to Figures 1-4 :

[0023] A rotary cooling and lubricating structure of a pump, including a pump body 1 and a shaft 2. A lower bearing seat 3 and an oil cylinder cover 4 are arranged in the pump body 1. A bearing 5 and a mechanical seal 6 are arranged between the lower bearing seat 3 and the shaft 2. The oil cylinder cover 4 is arranged below the lower bearing seat 3, and an oil chamber 7 for accommodating lubricating oil is formed between the lower bearing seat 3 and the oil cylinder cover 4. The friction pair of the dynamic and static rings of the mechanical seal 6 is higher than the highest oil level 10 of the lubricating oil. A spiral drainage track 8 and a lubrication hole 9 are arranged on the lower bearing seat 3 opposite to the mechanical seal 6. When the shaft 2 rotates, the lubricating oil is guided by the spiral drainage track 8 to spiral upward to the friction pair of the dynamic and static rings of the mechanical seal 6, and then flows back to the oil chamber 7 through the lubrication hole 9.

[0024] During operation, the motor drives the shaft 2 to rotate, and the lubricating oil in the oil chamber 7 is stirred. The stirred lubricating oil is guided by the spiral drainage track 8 and spirally rises along with the spiral drainage track 8 (as shown in the attached Figure 4 figure), reaches above the oil chamber 7, lubricates the friction pair of the dynamic and static rings of the mechanical seal 6, and at the same time takes away the heat generated by the friction of the mechanical seal 6. The rising lubricating oil flows back to the oil chamber 7 through the lubrication hole 9, and circulates reciprocally.

[0025] Refer to the attached Figure 1 figure. The lower end of the spiral drainage track 8 is lower than the highest oil level 10, and the upper end is higher than the highest oil level 10; the inflow port of the lubrication hole 9 is higher than the highest oil level 10, and the outflow port is lower than the highest oil level 10; the inflow port of the lubrication hole 9 is located above the spiral drainage track 8.

[0026] Refer to the attached Figure 2 figure and the attached Figure 3 figure. A drainage ring 11 extending below the highest oil level 10 is coaxially arranged at the lower end of the lower bearing seat 3 with the shaft 2. The spiral drainage track 8 is arranged on the inner wall of the drainage ring 11, and the lubrication hole 9 penetrates through the drainage ring 11. Preferably, the lower end surface of the drainage ring 11 extends beyond the lower end surface of the mechanical seal 6.

[0027] To address the strength reduction caused by drilling holes in the drainage ring 11, a reflux bump 12 is provided on the outer wall of the drainage ring 11, and the lubrication hole 9 obliquely penetrates through the reflux bump 12 from top to bottom and outward; the axis 2 of the lubrication hole 9 is a straight line; the provision of the reflux bump 12 can also extend the length of the lubrication hole 9, making it easier to extend into the oil chamber 7 without the need to set holes with too large an angle in the drainage ring 11.

[0028] The above-mentioned spiral drainage track 8 protrudes from the inner wall of the drainage ring 11 and has a gap with the mechanical seal 6.

[0029] In the above-mentioned rotary cooling and lubricating structure of a pump, the upper end of the reflux bump 12 is integrally connected to the lower end of the lower bearing seat 3, and the lower end of the reflux bump 12 is provided with an inclined surface that inclines inward from top to bottom; the reflux bump 12 with the above structure can enhance its structural strength.

[0030] A number of radially distributed strengthening plates 13 are provided on the outer wall of the above-mentioned drainage ring 11, and the strengthening plates 13 are integrally connected to the lower end surface of the lower bearing seat 3; the strengthening plates 13 can enhance the structural strength of the drainage ring 11.

[0031] The above-mentioned lower bearing seat 3, drainage ring 11, spiral drainage track 8, reflux bump 12 and strengthening plate 13 are integrally cast.

[0032] To guide more lubricating oil to rise and obtain better lubrication and heat dissipation effects, two or more of the spiral drainage tracks 8 and lubrication holes 9 are provided and are arranged in one-to-one correspondence, and the spiral drainage tracks 8 and lubrication holes 9 are evenly distributed in the circumferential direction. In this embodiment, two spiral drainage tracks 8 and lubrication holes 9 are respectively provided.

[0033] The curve of the above-mentioned spiral drainage track 8 is adapted to the specifications of the pump. Through simulation software (such as SOLIDWORKS SIMULATION), finite element analysis can be applied to find the optimal drainage track curve so that the lubricating oil can be smoothly lubricated and circulated.

[0034] The above embodiments are only the preferred embodiments of the present invention and do not limit the protection scope of the present invention accordingly. Therefore, all equivalent changes made according to the structure, shape and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A rotary cooling and lubrication structure for a pump, comprising a pump body (1) and a shaft (2), wherein a lower bearing seat (3) and a cylinder cover (4) are arranged in the pump body (1), a bearing (5) and a mechanical seal (6) are arranged between the lower bearing seat (3) and the shaft (2), the cylinder cover (4) is arranged below the lower bearing seat (3), and an oil chamber (7) for accommodating lubricating oil is formed between the lower bearing seat (3) and the cylinder cover (4), characterized in that: A spiral drainage track (8) and a lubrication hole (9) are provided on the lower bearing seat (3) opposite to the mechanical seal (6). When the shaft rotates, the lubricating oil is guided by the spiral drainage track (8) to rise to the friction pair of the dynamic and static rings of the mechanical seal (6), and then flows back to the oil chamber (7) through the lubrication hole (9).

2. A rotary cooling and lubrication structure for a pump according to claim 1, characterized in that: The lower end of the spiral drainage track (8) is lower than the highest oil level (10), and the upper end is higher than the highest oil level (10); the inlet of the lubrication hole (9) is higher than the highest oil level (10), and the outlet is lower than the highest oil level (10); the inlet of the lubrication hole (9) is located above the spiral drainage track (8).

3. The rotary cooling and lubrication structure of a pump according to claim 1, characterized in that: A drainage ring (11) extending below the highest oil level (10) is coaxially arranged at the lower end of the lower bearing seat (3); the spiral drainage track (8) is arranged on the inner wall of the drainage ring (11); and the lubrication hole (9) is arranged through the drainage ring (11).

4. A rotary cooling and lubrication structure for a pump according to claim 3, characterized in that: A return lug (12) is provided on the outer wall of the guide ring (11), and the lubrication hole (9) penetrates the return lug (12) from top to bottom and outwardly.

5. The rotary cooling and lubrication structure of a pump according to claim 4, characterized in that: The upper end of the return protrusion (12) is integrally connected to the lower end of the lower bearing seat (3), and the lower end of the return protrusion (12) is provided with an inclined surface that is inclined inward from top to bottom.

6. The rotary cooling and lubrication structure of a pump according to claim 4, characterized in that: A plurality of radially distributed reinforcing plates (13) are arranged on the outer wall of the guide ring (11), and the reinforcing plates (13) are integrally connected to the lower end surface of the lower bearing seat (3).

7. The rotary cooling and lubrication structure of a pump according to claim 6, characterized in that: The lower bearing seat (3), the drainage ring (11), the spiral drainage track (8), the return convex block (12) and the reinforcing plate (13) are integrally formed.

8. The rotary cooling and lubrication structure of a pump according to claim 1, characterized in that: The spiral drainage track (8) and the lubrication hole (9) are both provided with more than two and are arranged in a one-to-one correspondence, and the spiral drainage track (8) and the lubrication hole (9) are evenly distributed along the circumferential direction.

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