Oil leakage collecting structure of water pump

Abstract

The utility model belongs to water pump technical field, especially point to a kind of oil leakage collection structure of water pump, including shaft, lower bearing seat and oil chamber are equipped with outside the shaft, and lower bearing seat is located above oil chamber, the oil cavity that is formed between lower bearing seat and oil chamber and is in containing mechanical lubricating oil, mechanical seal is equipped in the oil cavity, and it is equipped with bearing in the lower bearing seat side away from mechanical seal and outside the shaft, the discharge passage that is in the lower bearing seat and is connected lower bearing seat inside and outside two sides, the space between bearing and mechanical seal is connected in the oil inlet of discharge passage, the space of the oil outlet of discharge passage is connected in the side away from oil chamber of lower bearing seat. The utility model effectively avoids the grease in bearing pollution in the mechanical lubricating oil seepage into bearing, and then effectively prolongs the service life of bearing.

Description

Technical Field

[0001] This utility model belongs to the field of water pump technology, and specifically refers to a water pump oil leakage collection structure. Background Technology

[0002] Chinese utility model patent (publication number CN208749598U, application date 2018.09.19, publication date 2019.04.16) discloses a submersible electric pump with a mechanical seal pressure reduction structure. The submersible electric pump includes a base, a pump body, and a rotating shaft inserted into the base and pump body. The base contains a stator and a rotor that drives the rotating shaft to rotate. The pump body has an inlet and an outlet. The lower end of the rotating shaft is located within the pump body, and an impeller is fixed to that end. The upper end of the pump body is connected to the rotor... A skeleton oil seal is provided between the shafts; an oil chamber is provided at the lower end of the base, and an oil cavity is provided within the oil chamber. A cylinder cover for sealing the opening of the oil cavity is also fixedly installed at the lower end of the oil chamber; a mechanical seal is provided within the oil cavity, surrounding the rotating shaft; the cylinder cover has an annular mounting groove in the middle surrounding the rotating shaft, and a skeleton oil seal is provided within the annular mounting groove, fitted onto the rotating shaft; one side of the pump body is fixedly connected to the oil chamber at the lower end of the base by connecting bolts, and a pressure relief gap exists between the other side of the pump body and the cylinder cover. Referring to the accompanying drawings, a bearing fitted onto the rotating shaft is provided on the side of the oil chamber furthest from the mechanical seal.

[0003] The shortcomings of the above-mentioned submersible pump are: when the mechanical seal in the oil chamber fails, the mechanical lubricating oil in the oil chamber will seep into the bearing above from the gap between the shaft and the oil chamber, contaminating the grease in the bearing and shortening the bearing's service life. Utility Model Content

[0004] The purpose of this invention is to provide an oil leakage collection structure for a water pump, which effectively prevents mechanical lubricating oil from seeping into the bearing and contaminating the grease in the bearing, thereby effectively extending the service life of the bearing.

[0005] This utility model is implemented as follows: An oil leakage collection structure for a water pump includes a rotating shaft, a lower bearing housing and an oil chamber fitted around the rotating shaft, with the lower bearing housing located above the oil chamber. An oil cavity containing mechanical lubricating oil is formed between the lower bearing housing and the oil chamber. A mechanical seal fitted around the rotating shaft is provided inside the oil cavity. A bearing fitted around the rotating shaft is provided on the side of the lower bearing housing away from the mechanical seal. A discharge channel connecting the inner and outer sides of the lower bearing housing is provided inside the lower bearing housing. The oil inlet of the discharge channel connects to the space between the bearing and the mechanical seal, and the oil outlet of the discharge channel connects to the space on the side of the lower bearing housing away from the oil chamber.

[0006] In the above-mentioned oil leakage collection structure for a water pump, the lower bearing housing includes a bearing mounting base, a mechanical seal mounting base, and a cover plate. The bearing mounting base houses a bearing fitted onto the outside of the rotating shaft. The upper end of the mechanical seal is installed inside the mechanical seal mounting base. The cover plate covers the oil chamber. The oil inlet of the discharge channel connects to the inner space of the bearing mounting base, and the oil outlet of the discharge channel connects to the space above the cover plate. The lowest point of the oil outlet of the discharge channel is higher than the upper surface of the cover plate.

[0007] In the above-mentioned oil leakage collection structure for a water pump, the bearing mounting base includes an annular portion one surrounding the outer periphery of the bearing and an annular limiting boss one for lower limiting of the bearing. The mechanical seal mounting base includes an annular portion two surrounding the upper periphery of the mechanical seal and an annular limiting boss two for upper limiting of the mechanical seal. The upper surface of the annular limiting boss one is higher than the upper surface of the annular limiting boss two. The highest point of the oil inlet of the discharge channel is located between the upper surface of the annular limiting boss one and the upper surface of the annular limiting boss two, and the lowest point of the oil inlet of the discharge channel is lower than the upper surface of the annular limiting boss two.

[0008] In the above-mentioned oil leakage collection structure of a water pump, the inner diameter of the first annular limiting boss is larger than the inner diameter of the second annular limiting boss, and an annular groove is formed between the second annular limiting boss and the second annular limiting boss. The oil inlet of the discharge channel is connected to the annular groove.

[0009] In the above-mentioned oil leakage collection structure for a water pump, the discharge channel is a cylindrical hole, and the axis of the cylindrical hole is set in the horizontal direction. The height of the axis of the cylindrical hole is higher than the upper surface of the annular limiting boss.

[0010] In the above-mentioned oil leakage collection structure for a water pump, the upper surface of the cover plate is recessed to form an oil storage tank.

[0011] In the above-mentioned oil leakage collection structure of a water pump, a reinforcing rib is provided on the side of the lower bearing housing away from the oil chamber, and the position of the reinforcing rib corresponds to the discharge channel.

[0012] In the aforementioned oil leakage collection structure for a water pump, an oil lifting ring is fitted around the mechanical seal.

[0013] In the above-mentioned oil leakage collection structure of a water pump, the bottom of the oil chamber is provided with a bottom flange edge, which is fixedly connected to the pump body by flange bolts; the top of the lower bearing seat is provided with a top flange edge, which is fixedly connected to the motor housing by flange bolts; the oil chamber and the lower bearing seat are fixed by screws.

[0014] The outstanding advantages of this utility model compared to the prior art are: 1. This utility model provides a discharge channel connecting the inner and outer sides of the lower bearing housing. The mechanical lubricating oil that seeps into the mechanical seal will flow through the discharge channel into the space on the side of the lower bearing housing away from the oil chamber, effectively preventing the mechanical lubricating oil from seeping into the bearing and contaminating the grease in the bearing, thereby effectively extending the service life of the bearing.

[0015] 2. The discharge channel of this utility model is a cylindrical hole, and the axis of the cylindrical hole is set in the horizontal direction, which is simple in structure and easy to process. Attached Figure Description

[0016] Figure 1 This is a cross-sectional view of the present invention.

[0017] Figure 2 yes Figure 1 Enlarged view of point A.

[0018] Figure 3 This is a cross-sectional view of the lower bearing housing of this utility model.

[0019] Figure 4 yes Figure 3 Enlarged view of point B.

[0020] Figure 5 This is a perspective view of the lower bearing housing of this utility model.

[0021] Reference numerals: 1. Shaft; 2. Lower bearing housing; 2a. Bearing mounting base; 2a1. Annular part one; 2a2. Annular limiting boss one; 2b. Mechanical seal mounting base; 2b1. Annular part two; 2b2. Annular limiting boss two; 2c. Cover plate; 3. Oil chamber; 4. Mechanical lubricating oil; 5. Mechanical seal; 6. Bearing; 7. Discharge channel; 8. Annular groove; 9. Oil reservoir; 10. Reinforcing rib; 11. Oil lifting ring; 12. Motor housing. Detailed Implementation

[0022] The present invention will be further described below with reference to specific embodiments. See also: Figure 1 —5: An oil leakage collection structure for a water pump includes a rotating shaft 1, a lower bearing housing 2 and an oil chamber 3 externally mounted on the rotating shaft 1, with the lower bearing housing 2 located above the oil chamber 3. An oil cavity containing mechanical lubricating oil 4 is formed between the lower bearing housing 2 and the oil chamber 3. A mechanical seal 5 is mounted on the rotating shaft 1 within the oil cavity. A bearing 6 mounted on the rotating shaft 1 is located on the side of the lower bearing housing 2 away from the mechanical seal 5. A discharge channel 7 is provided inside the lower bearing housing 2, connecting the inner and outer sides of the lower bearing housing 2. The oil inlet of the discharge channel 7 connects to the space between the bearing 6 and the mechanical seal 5, and the oil outlet of the discharge channel 7 connects to the space on the side of the lower bearing housing 2 away from the oil chamber 3.

[0023] Figure 2The direction of the middle arrow indicates the flow direction of the mechanical lubricating oil 4.

[0024] The working principle of this utility model is as follows: Figure 1-5 As shown, when the mechanical seal 5 fails, the mechanical lubricating oil 4 in the oil chamber seeps into the space above the mechanical seal 5 through the gap between the mechanical seal 5 and the rotating shaft 1 and the gap between the mechanical seal 5 and the lower bearing seat 2. Then, it flows through the discharge channel 7 into the space on the side of the lower bearing seat 2 away from the oil chamber 3, effectively preventing the mechanical lubricating oil 4 from seeping into the bearing 6 and contaminating the grease in the bearing 6, thereby effectively extending the service life of the bearing 6.

[0025] The specific structure of the lower bearing housing 2 is as follows: Figure 1-5 As shown, the lower bearing housing 2 includes a bearing mounting base 2a, a mechanical seal mounting base 2b, and a cover plate 2c. The bearing mounting base 2a houses a bearing 6 that is fitted onto the outside of the rotating shaft 1. The upper end of the mechanical seal 5 is installed inside the mechanical seal mounting base 2b. The cover plate 2c covers the oil chamber 3. The oil inlet of the discharge channel 7 connects to the inner space of the bearing mounting base 2a, and the oil outlet of the discharge channel 7 connects to the space above the cover plate 2c. The lowest point of the oil outlet of the discharge channel 7 is higher than the upper surface of the cover plate 2c.

[0026] Furthermore, the bearing mounting base 2a includes an annular portion 2a1 surrounding the outer periphery of the bearing 6 and an annular limiting boss 2a2 that limits the lower position of the bearing 6. The mechanical seal mounting base 2b includes an annular portion 2b1 surrounding the upper periphery of the mechanical seal 5 and an annular limiting boss 2b2 that limits the upper position of the mechanical seal 5. The upper surface of the annular limiting boss 2a2 is higher than the upper surface of the annular limiting boss 2b2. The highest point of the oil inlet of the discharge channel 7 is located between the upper surface of the annular limiting boss 2a2 and the upper surface of the annular limiting boss 2b2, and the lowest point of the oil inlet of the discharge channel 7 is lower than the upper surface of the annular limiting boss 2b2, which facilitates the entry of mechanical lubricating oil 4 into the discharge channel 7.

[0027] To further facilitate the entry of mechanical lubricating oil 4 into the discharge channel 7, the inner diameter of the annular limiting boss 2a2 is larger than the inner diameter of the annular limiting boss 2b2. An annular groove 8 is formed between the annular limiting boss 2b2 and the annular limiting boss 2b2. The oil inlet of the discharge channel 7 is connected to the annular groove 8.

[0028] Furthermore, the inner diameter of the annular limiting boss 2b2 is larger than the inner diameter of the mechanical seal 5, and the inner diameter of the annular limiting boss 2b2 is 1.4-1.5 times the inner diameter of the mechanical seal 5.

[0029] Preferably, the discharge channel 7 is a cylindrical hole, and the axis of the cylindrical hole is set in the horizontal direction. The height of the axis of the cylindrical hole is higher than the upper surface of the annular limiting boss 2b2. The structure is simple and easy to process.

[0030] In order to more effectively collect leaked mechanical lubricating oil and further extend the life of bearing 6, such as Figure 1-5 As shown, the upper surface of the cover plate 2c is recessed to form an oil storage groove 9.

[0031] To enhance the strength of the lower bearing housing 2 at the discharge channel 7, a reinforcing rib 10 is provided on the side of the lower bearing housing 2 away from the oil cavity, and the position of the reinforcing rib 10 corresponds to the discharge channel 7.

[0032] Furthermore, the mechanical seal 5 is fitted with an oil lifting ring 11. When the mechanical lubricating oil 4 in the oil chamber leaks, causing the oil level in the oil chamber to drop, the oil lifting ring 11 can supply the low-level mechanical lubricating oil 4 to the upper friction pair of the mechanical seal 5, providing lubrication and cooling to the upper friction pair, ensuring that the mechanical seal 5 will not be damaged quickly due to dry friction, thereby accelerating leakage and effectively improving the service life of the water pump.

[0033] Connection structure between lower bearing housing 2 and oil chamber 3: The bottom of the oil chamber 3 is provided with a bottom flange edge, which is fixedly connected to the pump body by flange bolts; the top of the lower bearing housing 2 is provided with a top flange edge, which is fixedly connected to the motor housing 12 by flange bolts; the oil chamber 3 and the lower bearing housing 2 are fixed by screws.

[0034] The above embodiments are only one of the preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes made in accordance with the shape, structure and principle of this utility model should be covered within the protection scope of this utility model.

Claims

1. A water pump oil leakage collection structure, comprising a rotating shaft (1), a lower bearing seat (2) and an oil chamber (3) are sleeved on the rotating shaft (1), and the lower bearing seat (2) is located above the oil chamber (3), an oil cavity containing mechanical lubricating oil (4) is formed between the lower bearing seat (2) and the oil chamber (3), a mechanical seal (5) sleeved on the rotating shaft (1) is arranged in the oil cavity, and a bearing (6) sleeved on the rotating shaft (1) is arranged on the side of the lower bearing seat (2) away from the mechanical seal (5), characterized in that: The lower bearing housing (2) is provided with a discharge channel (7) connecting the inner and outer sides of the lower bearing housing (2). The oil inlet of the discharge channel (7) connects the space between the bearing (6) and the mechanical seal (5), and the oil outlet of the discharge channel (7) connects the space of the lower bearing housing (2) away from the oil chamber (3). ​ 2. The oil leakage collecting structure of a water pump according to claim 1, characterized by: The lower bearing housing (2) includes a bearing mounting seat (2a), a mechanical seal mounting seat (2b), and a cover plate (2c). The bearing mounting seat (2a) is provided with a bearing (6) fitted outside the rotating shaft (1). The upper end of the mechanical seal (5) is installed in the mechanical seal mounting seat (2b). The cover plate (2c) covers the oil chamber (3). The oil inlet of the discharge channel (7) is connected to the inner space of the bearing mounting seat (2a), and the oil outlet of the discharge channel (7) is connected to the space above the cover plate (2c). The lowest point of the oil outlet of the discharge channel (7) is higher than the upper surface of the cover plate (2c).

3. The oil leakage collecting structure of a water pump according to claim 2, characterized in that: The bearing mounting base (2a) includes an annular portion one (2a1) surrounding the outer periphery of the bearing (6) and an annular limiting boss one (2a2) for lower limiting of the bearing (6). The mechanical seal mounting base (2b) includes an annular portion two (2b1) surrounding the outer periphery of the upper end of the mechanical seal (5) and an annular limiting boss two (2b2) ​​for upper limiting of the mechanical seal (5). The upper surface of the annular limiting boss one (2a2) is higher than the upper surface of the annular limiting boss two (2b2). The highest point of the oil inlet of the discharge channel (7) is located between the upper surface of the annular limiting boss one (2a2) and the upper surface of the annular limiting boss two (2b2). The lowest point of the oil inlet of the discharge channel (7) is lower than the upper surface of the annular limiting boss two (2b2).

4. The oil leakage collecting structure of a water pump according to claim 3, characterized in that: The inner diameter of the first annular limiting boss (2a2) is larger than the inner diameter of the second annular limiting boss (2b2). An annular groove (8) is formed between the second annular limiting boss (2b2) ​​and the second annular limiting boss (2b2). The oil inlet of the discharge channel (7) is connected to the annular groove (8).

5. The oil leakage collecting structure of a water pump according to claim 3, characterized in that: The discharge channel (7) is a cylindrical hole, and the axis of the cylindrical hole is set in the horizontal direction. The height of the axis of the cylindrical hole is higher than the upper surface of the annular limiting boss (2b2).

6. The oil leakage collecting structure of a water pump according to claim 2, characterized by: The upper surface of the cover plate (2c) is recessed to form an oil storage groove (9).

7. The oil leakage collecting structure of a water pump according to claim 1, characterized by: The lower bearing housing (2) is provided with a reinforcing rib (10) on the side away from the oil cavity, and the position of the reinforcing rib (10) corresponds to the discharge channel (7).

8. The oil leakage collecting structure of a water pump according to claim 1, characterized by: The mechanical seal (5) is fitted with an oil lifting ring (11).

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