High-performance axial flow pump bearing and axial flow pump

Abstract

The invention relates to the technical field of axial-flow pumps, and discloses a high-performance axial-flow pump bearing which comprises a bearing body, the bearing body comprises an outer ring part, an inner ring part and balls, the high-performance axial-flow pump bearing is characterized in that a sealing assembly is arranged on the bearing body and comprises an upper sealing plate and a lower sealing plate, and when the bearing body is used, the upper sealing plate and the lower sealing plate are arranged on the bearing body. The sealing assembly can prevent external dust from entering the bearing body, friction generated when balls in the bearing body rotate is reduced, the upper sealing plate and the lower sealing plate are each provided with a sealing column, the sealing assembly comprises the upper sealing plate and the lower sealing plate, the upper sealing plate and the lower sealing plate are tightly connected with a sealing groove of the bearing body through the sealing columns, and therefore the sealing effect is improved. And external dust can be effectively prevented from entering the bearing body, the dust can be prevented from entering a gap between the outer ring part and the inner ring part, the dust is prevented from being attached to the balls, and a clean operation environment is created for the interior of the bearing.

Description

Technical Field

[0001] This invention relates to the field of axial flow pump technology, specifically to a high-performance axial flow pump bearing and an axial flow pump. Background Technology

[0002] An axial flow pump is a type of impeller pump that relies on the thrust generated by the blades of a rotating impeller to transport liquid. Axial flow pumps are generally suitable for applications with large flow rates and low head, and are commonly used in agricultural irrigation, urban drainage, and large-scale water conservancy projects.

[0003] As a core transmission component, the bearing system of an axial flow pump directly affects the pump's operating efficiency, reliability, and service life. During the operation of an axial flow pump, the bearing needs to withstand radial and axial loads during high-speed rotation, while also facing the problem of environmental media intrusion under complex working conditions, especially the impact of dust, particulate impurities, etc. on the internal structure of the bearing. When the axial flow pump is running in a dusty environment or in a medium containing impurities, dust can easily intrude through the gap between the outer and inner rings of the bearing, adhering to the balls and the surface of the pump shaft, aggravating component wear, leading to increased frictional resistance, increased operating noise, and even bearing seizure failure. Summary of the Invention

[0004] The purpose of this invention is to provide a high-performance axial flow pump bearing and axial flow pump to solve the problems mentioned in the background art. Technical solution

[0005] This invention provides the following technical solution: a high-performance axial flow pump bearing, comprising a bearing body, wherein the bearing body includes an outer ring, an inner ring, and balls, characterized in that: a sealing assembly is provided on the bearing body, the sealing assembly including an upper sealing plate and a lower sealing plate, wherein when the bearing body is in use, the sealing assembly can prevent external dust from entering the bearing body and reduce the friction generated when the balls inside the bearing body rotate.

[0006] Preferably, both the upper and lower sealing plates are provided with sealing posts, and the outer and inner ring portions are provided with sealing grooves that match the sealing posts. The upper sealing plate is provided with oil passage holes.

[0007] An axial flow pump includes a high-performance axial flow pump bearing. The pump body includes a connecting frame and a motor. A pump shaft is mounted on the motor, and guide vanes are mounted on the pump shaft. A lubricating oil tank is located within the connecting frame, and a connecting pipe is mounted on the lubricating oil tank. An oil delivery assembly is installed within the connecting pipe, and an oil delivery pipe is also installed on the connecting pipe. The oil outlet of the oil delivery pipe is connected to the bearing body. When the pump shaft rotates, the oil delivery assembly in the connecting pipe intermittently delivers lubricating oil from the lubricating oil tank to the bearing body, increasing lubrication between the bearing body and the pump shaft and reducing friction.

[0008] Preferably, the connecting frame is further provided with a fixed bracket, the fixed bracket is provided with a fixed rod, the fixed rod is provided with a connecting rod and a first elastic element, one end of the connecting rod is provided with a fixed block, and the other end passes through the connecting pipe.

[0009] Preferably, the oil delivery assembly includes a first movable column and a second movable column. The first movable column has a first delivery chamber, and the second movable column has a second delivery chamber. The first movable column delivers lubricating oil from the lubricating oil tank to the second delivery chamber through the first delivery chamber, and then delivers the oil through the oil pipe into the bearing body to lubricate the contact area between the bearing body and the pump shaft.

[0010] Preferably, the connecting pipe has a connecting cavity that contacts the first movable column and the second movable column. The first movable column also has a first connecting hole and a second connecting hole, and the second movable column has a third connecting hole. A pressure plate is provided on the first movable column, and after the pressure plate moves down, the second connecting hole and the third connecting hole are connected to the connecting cavity.

[0011] Preferably, the first movable column and the second movable column are respectively disposed at the upper and lower ends of the connecting rod.

[0012] Preferably, a fixed frame is provided on the outside of the pump shaft, and a pushing component is provided in the fixed frame. The pushing component moves to drive the fixed block down and start the oil delivery component to start delivering oil to lubricate the inside of the bearing body.

[0013] Preferably, the pushing component includes a pushing block, a limiting block and a fixing column are provided in the fixing frame, a second elastic element and a sliding block are provided on the fixing column, and the sliding block is fixedly connected to the pushing block.

[0014] Preferably, the fixed block is provided with a first inclined surface and a second inclined surface on both sides, and the pushing block is provided with a third inclined surface and a fourth inclined surface on both sides. The pushing block drives the fixed block to move downward through the third inclined surface and the second inclined surface, and the first inclined surface and the fourth inclined surface slide in contact. Beneficial effects

[0015] Compared with the prior art, the present invention provides a high-performance axial flow pump bearing and axial flow pump, which has the following beneficial effects: 1. In this invention, the sealing assembly includes an upper sealing plate and a lower sealing plate, which are tightly connected to the sealing groove of the bearing body through a sealing post. This effectively prevents external dust from entering the bearing body and avoids dust from entering the gap between the outer ring and the inner ring, thus preventing dust from adhering to the balls and creating a clean operating environment inside the bearing.

[0016] 2. In this invention, the sealing component reduces the entry of dust, thereby reducing the loss caused by the friction of dust particles when the balls rotate with the pump shaft. The reduced friction makes the bearing run more smoothly, which helps to improve the overall operating efficiency of the axial flow pump and reduce energy consumption.

[0017] It should be understood that the foregoing general description and the following detailed description are exemplary and illustrative only, and are not intended to limit this disclosure.

[0018] This application provides an overview of various implementations or examples of the technology described in this disclosure, and is not a full disclosure of the entire scope or all features of the disclosed technology. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0020] Figure 1 This is a schematic diagram of the bearing body of the present invention; Figure 2 This is a front view of the pump body of the present invention; Figure 3 This is a front sectional view of the pump body of the present invention; Figure 4 This is a diagram showing the connection between the bearing body and the pump shaft in the connecting frame of the present invention; Figure 5 This is a cross-sectional view of the connecting frame of the present invention; Figure 6 This is a partial cross-sectional view of the front of the connecting frame of the present invention; Figure 7 This is a diagram showing the connection between the lubricating oil tank and the connecting pipe of the present invention; Figure 8 This is a side sectional view of the lubricating oil tank and connecting pipe of the present invention; Figure 9 This is a cross-sectional view of the connecting pipe and the internal first and second movable columns of the present invention. Figure 10 For the present invention Figure 6 Enlarged view of point A in the middle; Figure 11 This is a diagram showing the connection between the fixing block and the pushing block of the present invention; Figure 12 This is a schematic diagram of the third and fourth inclined surfaces on the push block of the present invention.

[0021] Explanation of reference numerals in the attached figures: In the diagram: 1. Pump body; 2. Connecting frame; 3. Motor; 4. Pump shaft; 5. Drain vane; 6. Bearing body; 7. Lubricating oil tank; 8. Connecting pipe; 9. Fixing frame; 10. Fixing bracket; 11. Fixing block; 12. Connecting rod; 13. First elastic element; 14. Lower pressure plate; 15. First movable column; 16. Connecting cavity; 17. First connecting hole; 18. Second connecting hole; 19. Third connecting hole; 20. First transport cavity; 21. ... 21. Transport chamber; 22. Limiting block; 23. Fixing post; 24. Second elastic element; 25. Sliding block; 26. Pushing block; 27. Fixing rod; 28. First inclined surface; 29. ​​Second inclined surface; 30. Third inclined surface; 31. Fourth inclined surface; 32. Second movable post; 33. Oil pipe; 34. Outer ring; 35. Inner ring; 36. Upper sealing plate; 37. Lower sealing plate; 38. Sealing groove; 39. Sealing post; 40. Ball bearing; 41. Oil passage hole. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example

[0023] Please see Figure 1 The present invention provides a technical solution: a high-performance axial flow pump bearing, including a bearing body 6, the bearing body 6 including an outer ring portion 34, an inner ring portion 35 and balls 40, the balls 40 being located between the outer ring portion 34 and the inner ring portion 35, and the pump shaft 4 passing through the inner ring portion 35, the pump shaft 4 and the inner surface of the inner ring portion 35 being in sliding contact, the bearing body 6 being provided with a sealing assembly, the sealing assembly including an upper sealing plate 36 and a lower sealing plate 37, when the bearing body 6 is in use, the sealing assembly can prevent external dust from entering the bearing body 6 and reduce the friction generated when the balls 40 inside the bearing body 6 rotate.

[0024] In this embodiment, sealing posts 39 are fixedly installed at equal intervals on the upper sealing plate 36 and the lower sealing plate 37. Sealing grooves 38 matching the sealing posts 39 are opened on the outer ring portion 34 and the inner ring portion 35. An oil passage hole 41 is opened through the upper sealing plate 36. Both the upper sealing plate 36 and the lower sealing plate 37 can be tightly connected to the bearing body 6 through the sealing posts 39 and the sealing grooves 38. The upper sealing plate 36 and the lower sealing plate 37 can prevent dust from entering the gap between the inner ring portion 34 and the outer ring portion 35, and prevent external dust from entering the balls 40 of the inner ring portion 34 and the outer ring portion 35. At the same time, it also increases the service life of the balls 40.

[0025] Please see Figures 2-12 The present invention provides a technical solution: an axial flow pump, including a high-performance axial flow pump bearing, including a pump body 1, a connecting frame 2 and a motor 3 fixedly installed on the pump body 1, the motor 3 being located outside the connecting frame 2, the output shaft of the motor 3 passing through the connecting frame 2 and fixedly connected to the pump shaft 4, and a guide vane 5 fixedly installed on the outside of the pump shaft 4 for pump body 1 to perform water diversion work.

[0026] A lubricating oil tank 7 is fixedly installed on the inner wall of the connecting frame 2. A connecting pipe 8 is fixedly installed at the bottom of the lubricating oil tank 7. An oil delivery component is provided in the connecting pipe 8. An oil delivery pipe 33 is fixedly installed at the bottom of the connecting pipe 8. The oil outlet of the oil delivery pipe 33 is connected to the oil passage hole 41. That is, the oil delivery pipe 33 will enter the bearing body 6 through the oil outlet, which is the connection between the balls 40 and the pump shaft 4 and the inner ring 35. When the pump shaft 4 rotates, the oil delivery component in the connecting pipe 8 will intermittently deliver the lubricating oil in the lubricating oil tank 7 to the bearing body 6, thereby increasing the lubrication of the balls 40 and the connection between the pump shaft 4 and the inner ring 35 inside the bearing body 6 and reducing friction.

[0027] In this embodiment, a fixed bracket 10 is fixedly installed in the connecting frame 2, and a fixed rod 27 is fixedly installed on the fixed bracket 10. A connecting rod 12 and a first elastic element 13 are movably installed on the outer side of the fixed rod 27. The top end of the fixed rod 27 is fixedly connected to the bottom end of the lubricating oil tank 7 to prevent the connecting rod 12 and the first elastic element 13 from detaching from the fixed rod 27. At the same time, the first elastic element 13 is fixedly installed at the bottom end of the connecting rod 12. When the first elastic element 13 is not subjected to pressure from the connecting rod 12, the connecting rod 12 is at its highest position in the through groove in the connecting pipe 8. The first connecting hole 17 on the first movable column 15 is still in the lubricating oil tank 7. When the connecting rod 12 is subjected to pressure and moves downward, the first connecting hole 17 on the first movable column 15 will extend into the connecting pipe 8. In this way, no lubricating oil will enter the first transport cavity 20 in the first movable column 15. The end of the connecting rod 12 away from the connecting pipe 8 is fixedly installed with a fixing block 11, and the end close to the connecting pipe 8 passes through the connecting pipe 8. A through groove is opened inside the connecting pipe 8 to facilitate the connection of the connecting rod 12 to both the first movable column 15 and the second movable column 32.

[0028] In this embodiment, the oil delivery assembly includes a first movable column 15 and a second movable column 32. The first movable column 15 has a first transport chamber 20, and the second movable column 32 has a second transport chamber 21. The first movable column 15 transports the lubricating oil in the lubricating oil tank 7 to the second transport chamber 21 through the first transport chamber 20, and then enters the bearing body 6 through the oil delivery pipe 33 to lubricate the contact part between the bearing body 6 and the pump shaft 4. When the first movable column 15 is not working, the first connecting hole 17 on the first movable column 15 is immersed in the lubricating oil tank 7, while the second connecting hole 18 is in contact with the inner wall of the connecting pipe 8 and is not connected to the connecting cavity 16. At the same time, the third connecting hole 19 is also in contact with the inner wall of the connecting pipe 8 and is not connected to the connecting cavity 16. The lubricating oil in the lubricating oil tank 7 can enter the first transport chamber 20 through the first connecting hole 17.

[0029] In this embodiment, a connecting cavity 16 is provided in the connecting pipe 8. The connecting cavity 16 is in contact with the first movable column 15 and the second movable column 32. The connecting cavity 16 is not connected to the through groove used to move the connecting rod 12. The connecting cavity 16 is used to transport the lubricant in the first transport cavity 20 to the second transport cavity 21, and to deliver the lubricant from the lubricating oil tank 7 to the oil supply pipe 33, thereby entering the bearing body 6 through the oil supply pipe 33, which is used to increase the lubrication of the internal balls 40 of the bearing body 6 and the connection between the pump shaft 4 and the inner ring 35.

[0030] In this embodiment, the first movable column 15 is also provided with a first connecting hole 17 and a second connecting hole 18, both of which are connected to the first transport cavity 20. The second movable column 32 is provided with a third connecting hole 19, which is connected to the second transport cavity 21. A lower pressure plate 14 is fixedly installed at the top of the first movable column 15. The lower pressure plate 14 is always located in the lubricating oil tank 7. The first movable column 15 also passes through the bottom of the lubricating oil tank 7 and extends into the lubricating oil tank 7. After the lower pressure plate 14 moves down, the second connecting hole 18 and the third connecting hole 19 are connected to the connecting cavity 16.

[0031] In this embodiment, the first movable column 15 and the second movable column 32 are fixedly installed at the upper and lower ends of the connecting rod 12, respectively.

[0032] In this embodiment, a fixed frame 9 is fixedly installed on the outside of the pump shaft 4. A pushing component is provided in the fixed frame 9. The pushing component moves to drive the fixed block 11 down and start the oil delivery component to start delivering oil to lubricate the inside of the bearing body 6.

[0033] In this embodiment, the pushing component includes a pushing block 26, a limiting block 22 and a fixing column 23 are fixedly installed in the fixing frame 9, the limiting block 22 is located above the fixing column 23 and does not contact the fixing column 23, the limiting block 22 is used to limit the sliding distance of the sliding block 25 on the fixing column 23, a second elastic member 24 and a sliding block 25 are movably installed on the outside of the fixing column 23 respectively, the second elastic member 24 and the sliding block 25 are fixedly connected, the bottom end of the sliding block 25 is fixedly connected to the pushing block 26, and the sliding block 25 is on the side close to the pump shaft 4.

[0034] In this embodiment, the fixed block 11 is provided with a first inclined surface 28 and a second inclined surface 29 on both sides, and the pushing block 26 is provided with a third inclined surface 30 and a fourth inclined surface 31 on both sides. The pushing block 26 drives the fixed block 11 to move down through the third inclined surface 30 and the second inclined surface 29, and the first inclined surface 28 and the fourth inclined surface 31 slide in contact.

[0035] The connecting rod 12 does not contact the first inclined surface 28 on the fixed block 11. At the same time, the connection position of the connecting rod 12 and the fixed block 11 is located below the first inclined surface 28. After the pushing block 26 moves to the side of the fixed block 11, the third inclined surface 30 contacts and separates from the second inclined surface 29. The downward distance of the fixed block 11 reaches its maximum, and the connecting rod 12 also descends by the same distance. The first movable column 15 and the second movable column 32 also descend and move simultaneously with the connecting rod 12.

[0036] After the third inclined surface 30 separates from the second inclined surface 29, the bottom end of the pushing block 26 contacts the top end of the fixed block 11. As the pushing block 26 continues to move away from the pump shaft 4, the fourth inclined surface 31 on the pushing block 26 will contact the first inclined surface on the fixed block 11. At this time, the fixed block 11 will move upward. When the sliding block 25 can no longer move, the fixed block 11 will move upward to its original position. When the motor 3 stops working, the pump shaft 4 will also stop rotating. Before the pump shaft 4 stops completely, the centripetal force on the sliding block 25 will decrease. Under the release of the elastic force of the second elastic element 24, the sliding block 25 will move towards the pump shaft 4. The pushing block 26 will then drive the fixed block 11 downward through the fourth inclined surface 31 and the first inclined surface 28 until the fourth inclined surface 31 separates from the first inclined surface 28, the second inclined surface 29 contacts the third inclined surface 30, and the fixed block 11 will move upward again until the pushing block 26 returns to its original position, and the fixed block 11 will also return to its original position.

[0037] During this period, the fixed block 11 moves up and down, which drives the oil delivery assembly through the connecting rod 12 to intermittently deliver the lubricating oil in the lubricating oil tank 7 to the inside of the bearing body 6, thereby ensuring the lubrication inside the bearing body 6, increasing the lubrication between the balls 40 and the inner and outer rings, as well as the lubrication at the connection between the pump shaft 4 and the inner ring 35, and reducing damage to the axial flow pump.

[0038] Initial lubrication during startup: When the axial flow pump has not been used for a long time, the oil delivery component will actively deliver lubricating oil during the first startup to fill the bearing clearance and avoid instantaneous wear caused by dry friction startup. This is especially suitable for axial flow pump scenarios with intermittent operation.

[0039] Rust prevention protection after shutdown: Before the pump shaft 4 stops rotating, the centripetal force decreases, the push component moves again, and lubricating oil is delivered to the inside of the bearing to form an oil film covering it, preventing the bearing from rusting due to prolonged static contact with air, and improving the maintainability of the equipment when it is idle.

[0040] The working principle of this embodiment is as follows: When the pump body 1 is pumping water, the motor 3 will start and drive the pump shaft 4 to rotate. At the same time, the diversion vanes 5 will also start working to achieve the water diversion function of the pump body 1.

[0041] When the pump shaft 4 starts to rotate, the speed of the pump shaft 4 will increase from 0. Before the speed of the pump shaft 4 reaches a constant, the centripetal force outside the pump shaft 4 will also gradually increase. When the pump shaft 4 starts to rotate, the sliding block 25 in the fixed frame 9 outside the pump shaft 4 will move away from the pump shaft 4 and squeeze the second elastic element 24. At the same time, as the sliding block 25 moves, the sliding block 25 will drive the pushing block 26 to move together. During the movement, the pushing block 26 will first cooperate with the second inclined surface 29 through the third inclined surface 30 to make the fixed block 11 start to move down in the connecting frame 2. When the fixed block 11 moves down, it will drive the connecting rod 12 to move down at the same time. When the connecting rod 12 moves down, it will drive the first movable column 15 and the second movable column 32 to move down in the connecting pipe 8 at the same time. When the first movable column 15 moves downward, its internal first connecting hole 17 will extend from the lubricating oil tank 7 into the connecting pipe 8. The lubricating oil that previously entered the first transport cavity 20 of the first movable column 15 through the first connecting hole 17 will be sealed. As the first movable column 15 moves downward, when the pushing block 26 moves to the upper surface of the fixed block 11, the second connecting hole 18 on the first movable column 15 will connect with the upper opening of the connecting cavity 16, and the third connecting hole 19 on the second movable column 32 will connect with the lower opening of the connecting cavity 16. In this way, the first transport cavity 20, the connecting cavity 16, and the second transport cavity 21 will be connected. Under the action of gravity, the lubricating oil in the first transport cavity 20 will flow into the connecting cavity 16 through the second connecting hole 18 and into the second transport cavity 21 through the third connecting hole 19, thereby flowing into the oil supply pipe 33 and finally into the bearing body 6, increasing the lubrication of the internal balls 40 of the bearing body 6 and the connection between the pump shaft 4 and the inner ring 35, and reducing the wear between them. As the pump shaft 4 continues to rotate, the centripetal force on the outer sliding block 25 of the pump shaft 4 gradually increases, and the pushing block 26 will continue to move away from the side of the pump shaft 4. The fourth inclined surface 31 on the pushing block 26 will contact the first inclined surface 28 on the fixed block 11. The fixed block 11 loses pressure and will move upward under the elastic force of the second elastic element 24 until the first connecting hole 17 on the first movable column 15 is back in the lubricating oil tank 7. In this way, the first transport cavity 20 will be filled with lubricating oil again. After the pump body 1 stops working, the pump shaft 4 speed begins to decrease, and the centripetal force of the pump shaft 4 begins to decrease. The push block 26 contacts the first inclined surface 28 of the fixed block 11 through the fourth inclined surface 31. At this time, the push block 26 will drive the fixed block 11 to move down through the fourth inclined surface 31 and the first inclined surface 28. That is, the oil delivery component will once again drive the lubricating oil in the lubricating oil tank 7 to be delivered into the bearing body 6. When the push block 26 contacts the fixed block 11 through the third inclined surface 30 and the second inclined surface 29, the oil delivery component begins to move back to its original position until the pump shaft 4 stops rotating and the oil delivery component returns to its original position.

[0042] The first oil delivery assembly delivers lubricating oil to the bearing body 6 when the pump body 1 has not been used for a period of time. The lubricating oil can increase the lubrication between the bearing body 6 and the pump shaft 4, reducing wear between them. The second oil delivery assembly delivers lubricating oil to the bearing body 6 when the pump body 1 stops working. At this time, the lubricating oil can effectively prevent the bearing body 6 from remaining lubricated even when it has not been used for a period of time, preventing rust and other issues.

[0043] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A high-performance axial flow pump bearing, comprising a bearing body (6), wherein the bearing body (6) includes an outer ring portion (34), an inner ring portion (35), and balls (40), characterized in that: The bearing body (6) is provided with a sealing assembly, which includes an upper sealing plate (36) and a lower sealing plate (37). When the bearing body (6) is in use, the sealing assembly can prevent external dust from entering the bearing body (6) and reduce the friction generated when the balls (40) inside the bearing body (6) rotate.

2. The high-performance axial flow pump bearing according to claim 1, characterized in that: Both the upper sealing plate (36) and the lower sealing plate (37) are provided with sealing posts (39), and the outer ring (34) and the inner ring (35) are provided with sealing grooves (38) that match the sealing posts (39). The upper sealing plate (36) is provided with an oil passage hole (41).

3. An axial flow pump, comprising a high-performance axial flow pump bearing according to any one of claims 1-2, characterized in that: The system includes a pump body (1), a connecting frame (2) and a motor (3) on the pump body (1), a pump shaft (4) on the motor (3), a guide vane (5) on the pump shaft (4), a lubricating oil tank (7) in the connecting frame (2), a connecting pipe (8) on the lubricating oil tank (7), an oil delivery component in the connecting pipe (8), an oil delivery pipe (33) on the connecting pipe (8), and the oil outlet of the oil delivery pipe (33) is connected to the bearing body (6). When the pump shaft (4) rotates, the oil delivery component in the connecting pipe (8) will intermittently deliver the lubricating oil in the lubricating oil tank (7) to the bearing body (6), thereby increasing the lubrication between the bearing body (6) and the pump shaft (4) and reducing friction.

4. An axial flow pump according to claim 3, characterized in that: The connecting frame (2) is also provided with a fixed bracket (10), and a fixed rod (27) is provided on the fixed bracket (10). A connecting rod (12) and a first elastic element (13) are provided outside the fixed rod (27). A fixed block (11) is provided at one end of the connecting rod (12), and the other end passes through the connecting pipe (8).

5. An axial flow pump according to claim 4, characterized in that: The oil delivery assembly includes a first movable column (15) and a second movable column (32). The first movable column (15) has a first transport chamber (20), and the second movable column (32) has a second transport chamber (21). The first movable column (15) transports the lubricating oil in the lubricating oil tank (7) to the second transport chamber (21) through the first transport chamber (20), and then enters the bearing body (6) through the oil delivery pipe (33) to lubricate the contact part between the bearing body (6) and the pump shaft (4).

6. An axial flow pump according to claim 3, characterized in that: The connecting pipe (8) has a connecting cavity (16) which is in contact with the first movable column (15) and the second movable column (32). The first movable column (15) also has a first connecting hole (17) and a second connecting hole (18), and the second movable column (32) has a third connecting hole (19). A lower pressure plate (14) is provided on the first movable column (15). After the lower pressure plate (14) moves down, the second connecting hole (18) and the third connecting hole (19) are connected to the connecting cavity (16).

7. An axial flow pump according to claim 6, characterized in that: The first movable column (15) and the second movable column (32) are respectively installed at the upper and lower ends of the connecting rod (12).

8. An axial flow pump according to claim 3, characterized in that: A fixed frame (9) is provided on the outside of the pump shaft (4). A pushing component is provided in the fixed frame (9). The pushing component moves to drive the fixed block (11) to move down and start the oil delivery component to start oil delivery to lubricate the inside of the bearing body (6).

9. An axial flow pump according to claim 8, characterized in that: The pushing component includes a pushing block (26), a limiting block (22) and a fixing column (23) in the fixing frame (9), and a second elastic element (24) and a sliding block (25) are provided on the fixing column (23), and the sliding block (25) and the pushing block (26) are fixedly connected.

10. An axial flow pump according to claim 9, characterized in that: The fixed block (11) has a first inclined surface (28) and a second inclined surface (29) on both sides, and the pushing block (26) has a third inclined surface (30) and a fourth inclined surface (31) on both sides. The pushing block (26) drives the fixed block (11) to move down through the third inclined surface (30) and the second inclined surface (29), and the first inclined surface (28) and the fourth inclined surface (31) slide in contact.

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