Self-cooling centrifugal pump

Abstract

The invention relates to the technical field of centrifugal pumps, in particular to a self-heat-dissipation centrifugal pump which comprises a first fixing plate, the outer wall of a motor is fixedly connected with a first cooling pipe, the outer wall of the first cooling pipe is fixedly connected with a conduction plate, and the outer wall of a fourth gear is meshed with three evenly-distributed heat dissipation devices. The end, away from the motor, of the first shaft rod is fixedly connected with an impeller, the outer wall of the bearing is rotationally connected with a pump body, the outer wall of the pump body is fixedly connected with a water outlet, and the outer wall of the side, away from the motor, of the pump body is fixedly connected with a water inlet. According to the self-heat-dissipation centrifugal pump, by arranging the heat dissipation device, when the motor runs, heat dissipation can be conducted on the centrifugal pump through rotation of the motor, damage, blockage and the like caused by impurities in water flow to the pump body are prevented through rotation of the motor and arrangement of the scraping device, and heat dissipation of the bearing can be further promoted through movement of the scraping device.

Description

Technical Field

[0001] The invention relates to the technical field of centrifugal pumps, and in particular to a self-heating centrifugal pump. Background Art

[0002] When the centrifugal pump is working, the impeller is driven by the motor to rotate at high speed, forcing the liquid between the blades to rotate at a nearly constant angular velocity. Due to the centrifugal force, the liquid moves radially from the center of the impeller to the outer edge. The liquid gains energy during the movement in the impeller and leaves the outer edge of the impeller at high speed to enter the volute pump casing. In the volute, the liquid slows down due to the gradual expansion of the flow channel, and part of the kinetic energy is converted into potential energy, and finally flows into the outlet pipe tangentially. While the liquid is forced to be pushed from the center of the impeller to the outer edge, a low pressure is formed in the center of the impeller, so that the liquid can be continuously sucked into the impeller by relying on the potential energy difference between the suction point and the center of the impeller.

[0003] The following problems still exist in the prior art for a self-cooling centrifugal pump: 1. The overall heat dissipation of the centrifugal pump is not high. When the centrifugal pump is in use, the motor temperature is too high, causing damage to the centrifugal pump itself and shortening the service life of the centrifugal pump; 2. There is no filtering structure installed at the water inlet pipe, and impurities carried in the fluid enter the centrifugal pump, which can easily have an adverse effect on the internal structure of the pump body, resulting in the inability to carry out the conveying work normally. Therefore, a self-cooling centrifugal pump is proposed to solve the above-mentioned problems. Summary of the invention

[0004] The purpose of the present invention is to solve the problems in the background technology and to propose a self-heating centrifugal pump.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A self-heating centrifugal pump comprises a first fixed plate, a motor is arranged above the first fixed plate, an outer wall of the motor is fixedly connected to a first cooling tube, an outer wall of the first cooling tube is fixedly connected to a conduction plate, an outer wall of the conduction plate is fixedly connected to two symmetrically distributed first support seats, each of the first support seats is fixedly connected to the first fixed plate, an output shaft of the motor is fixedly connected to a first shaft rod, an outer wall of the first shaft rod is fixedly connected to a fourth gear, an outer wall of the fourth gear is meshed with three evenly distributed heat dissipation devices, an outer wall of the first fixed plate is fixedly connected to a first mounting frame, an outer wall of the first mounting frame is fixedly connected to a second fixed rod, an outer wall of the first fixed plate is fixedly connected to two second fixed plates, an outer wall of the first shaft rod is fixedly connected to a bearing, an end of the first shaft rod away from the motor is fixedly connected to an impeller, an outer wall of the bearing is rotatably connected to a pump body, an outer wall of the pump body is fixedly connected to a water outlet, an outer wall of the pump body on a side away from the motor is fixedly connected to a water inlet, an outer wall of the pump body is fixedly connected to two symmetrically distributed second support seats, and two second support seats are fixedly connected to the first fixed plate.

[0006] In the above-mentioned self-cooling centrifugal pump, the heat dissipation device includes a second gear, the outer wall of the second gear is fixedly connected to the first gear, the outer wall of the first gear is meshed with a third gear, and two evenly distributed first rotating shafts are arranged on the side of the third gear away from the first gear, and the outer walls of the two first rotating shafts are fixedly connected with belts, one of the first rotating shafts is fixedly connected to the third gear through a set shaft rod, and the other first rotating shaft is fixedly connected to a cooling fan through a set shaft rod.

[0007] In the above-mentioned self-cooling centrifugal pump, one group of the first rotating shafts is rotatably connected to the second fixed rod through a set shaft rod, and the other two groups of the first rotating shafts are respectively rotatably connected to the second fixed plate through set shaft rods, and the three second gears are all rotatably connected to the first mounting frame.

[0008] In the above-mentioned self-heating centrifugal pump, the outer wall of the first shaft is fixedly connected to a transmission device, and the transmission device includes a cam, the outer wall of the cam is slidably connected to a slider, the outer wall of the slider is fixedly connected to a telescopic rod, and the outer walls on both sides of the telescopic rod are rotatably connected to a fourth fixed plate, each of the fourth fixed plates is fixedly connected to the pump body, and the outer walls on both sides of the telescopic rod at one end away from the fourth fixed plate are rotatably connected to two third fixed plates, and the outer walls of the two third fixed plates are fixedly connected to a scraping device.

[0009] In the above-mentioned self-heating centrifugal pump, the scraping device includes a push rod, the outer wall of the push rod is slidably connected to a sealing rubber ring, the outer wall of the sealing rubber ring is fixedly connected to a connecting piece, the outer wall of the connecting piece is slidably connected to a first sealing cavity, the first sealing cavity is fixedly connected to the water inlet, and the end of the connecting piece away from the third fixed plate is fixedly connected to a scraper.

[0010] In the above-mentioned self-heating centrifugal pump, a filter plate is fixedly connected to the inner wall of the water inlet, and two symmetrically distributed second slides are slidably connected to the inner wall of the water inlet, and a plurality of evenly distributed springs are fixedly connected to the outer wall of each of the second slides, and one end of each of the springs away from the second slide is fixedly connected to the inner wall of the water inlet, and a first slide is slidably connected to the inner wall of the water inlet, and a sealing ring is fixedly connected to the outer wall of the first slide.

[0011] In the above-mentioned self-cooling centrifugal pump, the bottom outer wall of the water inlet is fixedly connected to a second sealing cavity, the inner wall of the second sealing cavity is fixedly connected to a plurality of evenly distributed flexible bristles, the outer wall of the sealing rubber ring is fixedly connected to a first fixing rod, both ends of the first fixing rod are fixedly connected to connecting plates, an airbag is arranged under each connecting plate, and each connecting plate is fixedly connected to the airbag.

[0012] In the above-mentioned self-cooling centrifugal pump, the outer wall of the airbag is fixedly connected to a second cooling tube, the outer wall of the second cooling tube is fixedly connected to the pump body, the end of the second cooling tube away from the airbag is fixedly connected to a breathable shell, the breathable shell is fixedly connected to the pump body, the breathable shell is rotatably connected to the outer wall of the first shaft, and the two ends of the first cooling tube are respectively connected to the water outlet and the pump body.

[0013] Compared with the existing technology, the advantages of this self-heating centrifugal pump are: 1. The first shaft drives the cooling fan to blow air to dissipate heat on the conduction plate. The rotation of the first shaft drives the impeller to rotate. The impeller sucks water into the pump body from the water inlet and sends it out from the water outlet. Part of the water passes through the first cooling pipe to cool the motor. The double cooling makes the cooling and heat dissipation effect better, and the cooling water is always in a continuous circulation state; 2. When water flows through the filter plate, impurities in the water will be blocked on one side of the filter plate. When the connector drives the scraper plate to move downward, the impurities are scraped off by the scraper plate. The inclined plate of the scraper plate and the filter plate form a limit for the impurities. When the scraper plate continues to move downward and begins to contact the second slide plate, the spring will be compressed. The second slide plate always fits the outer wall of the scraper plate. The scraper plate shuttles in the flexible bristles, and the impurities are retained by the flexible bristles to prevent the filter plate from being blocked by excessive impurities. 3. When the third fixing plate moves, it moves with the first fixing rod, and the first fixing rod presses the airbag with the first fixing rod. The gas inside the airbag dissipates heat to the bearing along the second cooling tube. Since the second cooling tube is attached to the outer wall of the pump body, the heat dissipation effect is better. In summary, the present invention provides a heat dissipation device so that when the motor of the centrifugal pump is running, the heat can be dissipated by the rotation of the motor itself. The motor rotates, and a scraping device is provided to prevent impurities in the water flow from causing damage and blockage to the pump body. The movement of the scraping device can further promote the heat dissipation of the bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional structural schematic diagram of the present invention; Figure 2 It is a schematic diagram of the structure of the heat dissipation device of the present invention; Figure 3 The present invention Figure 2 Schematic diagram of the structure at A in the middle; Figure 4 It is a partial enlarged structural schematic diagram of the present invention; Figure 5 The present invention Figure 4 Schematic diagram of the structure at B in the middle; Figure 6 It is a schematic diagram of the water pipe arrangement structure of the present invention; Figure 7 It is a schematic diagram of the transmission structure of the present invention; Figure 8 The present invention Figure 7 Schematic diagram of the structure at C in the middle; Fig. 9 It is a schematic diagram of the structure of the scraping device of the present invention; Fig.10 It is a schematic diagram of the impurity storage structure of the present invention.

[0015] In the figure: 1, first fixing plate; 2, water inlet; 3, first fixing rod; 4, cam; 5, second fixing rod; 6, conduction plate; 7, first support seat; 8, second fixing plate; 9, first mounting frame; 10, water outlet; 11, second support seat; 12, pump body; 13, connecting plate; 14, airbag; 15, motor; 16, first gear; 17, second gear; 18, third gear; 19, belt; 20, first rotating shaft; 21, cooling fan; 22, first shaft; 23. First cooling tube; 24. Third fixed plate; 25. Telescopic rod; 26. Fourth fixed plate; 27. Push rod; 28. First sealing chamber; 29. ​​Second cooling tube; 30. Breathable shell; 31. Sliding block; 32. Impeller; 33. Bearing; 34. Sealing rubber ring; 35. Connecting piece; 36. Scraper; 37. Filter plate; 38. Sealing ring; 39. First slide plate; 40. Flexible bristles; 41. Second sealing chamber; 42. Spring; 43. Second slide plate; 44. Fourth gear. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0017] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0018] Reference Figure 1-Figure 10A self-heating centrifugal pump comprises a first fixed plate 1, a motor 15 is arranged above the first fixed plate 1, an outer wall of the motor 15 is fixedly connected to a first cooling tube 23, an outer wall of the first cooling tube 23 is fixedly connected to a conducting plate 6, an outer wall of the conducting plate 6 is fixedly connected to two symmetrically distributed first support seats 7, each of the first support seats 7 is fixedly connected to the first fixed plate 1, an output shaft of the motor 15 is fixedly connected to a first shaft rod 22, an outer wall of the first shaft rod 22 is fixedly connected to a fourth gear 44, and an outer wall of the fourth gear 44 is meshed with three evenly distributed heat dissipation devices, an outer wall of the first fixed plate 1 is fixedly connected to a first mounting frame 9, an outer wall of the first mounting frame 9 is fixedly connected to a second fixing rod 5, an outer wall of the first fixed plate 1 is fixedly connected to two second fixing plates 8, an outer wall of the first shaft rod 22 is fixedly connected to a bearing 33, an end of the first shaft rod 22 away from the motor 15 is fixedly connected to an impeller 32, an outer wall of the bearing 33 is rotatably connected to a pump body 12, and an outer wall of the pump body 12 is fixedly connected to a water outlet Inlet 10, the outer wall of the pump body 12 on one side away from the motor 15 is fixedly connected with the water inlet 2, the outer wall of the pump body 12 is fixedly connected with two symmetrically distributed second support seats 11, the two second support seats 11 are fixedly connected to the first fixed plate 1, the heat dissipation device includes a second gear 17, the outer wall of the second gear 17 is fixedly connected with the first gear 16, the outer wall of the first gear 16 is meshed with a third gear 18, and the side of the third gear 18 away from the first gear 16 is provided with two evenly distributed first rotating shafts 20, the outer walls of the two first rotating shafts 20 are fixedly connected with belts 19, one of the first rotating shafts 20 is fixedly connected with the third gear 18 through a set shaft rod, and the other first rotating shaft 20 is fixedly connected with a cooling fan 21 through a set shaft rod, one group of the first rotating shafts 20 is rotatably connected to the second fixed rod 5 through a set shaft rod, and the other two groups of first rotating shafts 20 are respectively rotatably connected to the second fixed plate 8 through the set shaft rods, and the three second gears 17 are rotatably connected to the first mounting frame 9.

[0019] In this embodiment, the motor 15 starts to start, driving the first shaft 22 to rotate, the first shaft 22 drives the fourth gear 44 to rotate, the fourth gear 44 is meshed with the second gear 17, driving the second gear 17 to rotate, the second gear 17 drives the first gear 16 to rotate, the first gear 16 drives the third gear 18 to rotate, the third gear 18 drives the corresponding first shaft 22 to rotate, the first shaft 22 drives the belt 19 to rotate, the belt 19 drives the first shaft 22 at the other end to rotate, the first shaft 22 drives the cooling fan 21 to blow air to dissipate heat to the conduction plate 6, the first shaft 22 rotates and drives the impeller 32 to rotate, the impeller 32 sucks water from the water inlet 2 into the pump body 12, and sends it out from the water outlet 10, part of the water passes through the first cooling pipe 23 to cool the motor 15, and the double cooling makes the cooling and heat dissipation effect better, and the cooled water is always in a continuous circulation state.

[0020] Among them, the outer wall of the first shaft rod 22 is fixedly connected to a transmission device, the transmission device includes a cam 4, the outer wall of the cam 4 is slidably connected to a slider 31, the outer wall of the slider 31 is fixedly connected to a telescopic rod 25, the outer walls on both sides of the telescopic rod 25 are rotatably connected to fourth fixed plates 26, each fourth fixed plate 26 is fixedly connected to the pump body 12, the outer walls on both sides of the telescopic rod 25 away from the fourth fixed plate 26 are rotatably connected to two third fixed plates 24, and the outer walls of the two third fixed plates 24 are fixedly connected to scraping devices.

[0021] In this embodiment, the cam 4 rotates while the first shaft 22 rotates, and the slider 31 slides along the shape of the cam 4, driving the telescopic rod 25 to swing around the fourth fixed plate 26 as the axis point, and the telescopic rod 25 drives the push rod 27 and the connecting member 35 to move up and down.

[0022] The scraping device includes a push rod 27, the outer wall of the push rod 27 is slidably connected with a sealing rubber ring 34, the outer wall of the sealing rubber ring 34 is fixedly connected with a connecting piece 35, the outer wall of the connecting piece 35 is slidably connected with a first sealing cavity 28, the first sealing cavity 28 is fixedly connected to the water inlet 2, the end of the connecting piece 35 away from the third fixed plate 24 is fixedly connected with a scraper 36, the inner wall of the water inlet 2 is fixedly connected with a filter plate 37, the inner wall of the water inlet 2 is slidably connected with two symmetrically distributed second slide plates 43, the outer wall of each second slide plate 43 is fixedly connected with a plurality of evenly distributed springs 42, each spring The end of the spring 42 away from the second slide plate 43 is fixedly connected to the inner wall of the water inlet 2, the inner wall of the water inlet 2 is slidably connected to the first slide plate 39, the outer wall of the first slide plate 39 is fixedly connected to the sealing ring 38, the bottom outer wall of the water inlet 2 is fixedly connected to the second sealing cavity 41, the inner wall of the second sealing cavity 41 is fixedly connected to a plurality of evenly distributed flexible bristles 40, the outer wall of the sealing rubber ring 34 is fixedly connected to the first fixing rod 3, both ends of the first fixing rod 3 are fixedly connected to the connecting plates 13, an airbag 14 is arranged under each connecting plate 13, and each connecting plate 13 is fixedly connected to the airbag 14.

[0023] In this embodiment, when water flows through the filter plate 37, impurities in the water will be blocked on one side of the filter plate 37. When the connector 35 drives the scraper 36 to move downward, the impurities are scraped off by the scraper 36. The inclined plate of the scraper 36 and the filter plate 37 form a limit for the impurities. When the scraper 36 continues to move downward and begins to contact the second slide plate 43, the spring 42 will be compressed. The second slide plate 43 always adheres to the outer wall of the scraper 36. The scraper 36 shuttles in the flexible bristles 40, and the impurities are retained by the flexible bristles 40.

[0024] Among them, the outer wall of the airbag 14 is fixedly connected to the second cooling tube 29, the outer wall of the second cooling tube 29 is fixedly connected to the pump body 12, the end of the second cooling tube 29 away from the airbag 14 is fixedly connected to the air-permeable shell 30, the air-permeable shell 30 is fixedly connected to the pump body 12, the air-permeable shell 30 is rotatably connected to the outer wall of the first shaft 22, and the two ends of the first cooling tube 23 are respectively connected to the water outlet 10 and the pump body 12.

[0025] In this embodiment, when the third fixed plate 24 moves, it moves with the first fixed rod 3, and the first fixed rod 3 presses the airbag 14. The gas inside the airbag 14 dissipates heat to the bearing 33 along the second cooling tube 29. Since the second cooling tube 29 is close to the outer wall of the pump body 12, the heat dissipation effect is better.

[0026] The specific working principle and use method of the present invention are explained in detail below: When in use, after the device is connected, the motor 15 starts to start, driving the first shaft 22 to rotate, the first shaft 22 drives the fourth gear 44 to rotate, the fourth gear 44 is engaged with the second gear 17, driving the second gear 17 to rotate, the second gear 17 drives the first gear 16 to rotate, the first gear 16 drives the third gear 18 to rotate, the third gear 18 drives the corresponding first shaft 22 to rotate, the first shaft 22 drives the belt 19 to rotate, the belt 19 drives The first shaft 22 at the other end is driven to rotate, and the first shaft 22 drives the cooling fan 21 to blow air to dissipate heat to the conduction plate 6. The first shaft 22 drives the impeller 32 to rotate while rotating. The impeller 32 sucks water from the water inlet 2 into the pump body 12 and sends it out from the water outlet 10. Part of the water passes through the first cooling pipe 23 to cool the motor 15. Through double cooling, the cooling and heat dissipation effect is better, and the cooled water is always in a continuous circulation state. When the first shaft 22 rotates, the cam 4 also rotates, and the slider 31 slides along the shape of the cam 4. The telescopic rod 25 is driven to swing with the fourth fixed plate 26 as the axis point, and the telescopic rod 25 drives the push rod 27 and the connecting piece 35 to move up and down. When the water flows through the filter plate 37, the impurities in the water will be blocked on one side of the filter plate 37. When the connecting piece 35 drives the scraper 36 to move downward, the impurities are scraped off by the scraper 36, and the inclined plate of the scraper 36 and the filter plate 37 form a limit for the impurities. When the scraper 36 continues to move downward and begins to contact the second slide plate 43, the spring 42 is compressed, and the second slide plate 43 always fits the outer wall of the scraper 36. The scraper 36 is on the flexible bristles 40, impurities are retained by the flexible bristles 40, the connecting piece 35 is retracted and the second slide plate 43 is retracted. When the stored impurities need to be cleaned, the first slide plate 39 can be pushed into the inner wall of the pump body 12, and the second sealed cavity 41 can be disassembled and cleaned. When the third fixed plate 24 moves, it moves with the first fixed rod 3, and the first fixed rod 3 presses the airbag 14. The gas inside the airbag 14 dissipates heat to the bearing 33 along the second cooling tube 29. Since the second cooling tube 29 is close to the outer wall of the pump body 12, the heat dissipation effect is better.

[0027] It is further explained that the above-mentioned fixed connection should be understood in a broad sense unless otherwise clearly specified and limited. For example, it can be welding, gluing, or one-piece molding, etc., which are conventional means well known to those skilled in the art.

[0028] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A self-cooling centrifugal pump, comprising a first fixing plate (1), characterized in that: A motor (15) is arranged above the first fixing plate (1); a first cooling tube (23) is fixedly connected to the outer wall of the motor (15); a conduction plate (6) is fixedly connected to the outer wall of the first cooling tube (23); two symmetrically distributed first support seats (7) are fixedly connected to the outer wall of the conduction plate (6); each of the first support seats (7) is fixedly connected to the first fixing plate (1); an output shaft of the motor (15) is fixedly connected to a first shaft rod (22); a fourth gear (44) is fixedly connected to the outer wall of the first shaft rod (22); three uniformly distributed heat dissipation devices are meshed on the outer wall of the fourth gear (44); a first mounting frame (9) is fixedly connected to the outer wall of the first fixing plate (1); The outer wall of the frame (9) is fixedly connected to a second fixing rod (5), the outer wall of the first fixing plate (1) is fixedly connected to two second fixing plates (8), the outer wall of the first shaft rod (22) is fixedly connected to a bearing (33), the end of the first shaft rod (22) away from the motor (15) is fixedly connected to an impeller (32), the outer wall of the bearing (33) is rotatably connected to a pump body (12), the outer wall of the pump body (12) is fixedly connected to a water outlet (10), the outer wall of the pump body (12) away from the motor (15) is fixedly connected to a water inlet (2), the outer wall of the pump body (12) is fixedly connected to two symmetrically distributed second support seats (11), and the two second support seats (11) are both fixedly connected to the first fixing plate (1); The heat dissipation device comprises a second gear (17), the outer wall of the second gear (17) is fixedly connected to the first gear (16), the outer wall of the first gear (16) is meshed with a third gear (18), two evenly distributed first rotating shafts (20) are arranged on a side of the third gear (18) away from the first gear (16), the outer walls of the two first rotating shafts (20) are fixedly connected to belts (19), one of the first rotating shafts (20) is fixedly connected to the third gear (18) via a set shaft, and the other first rotating shaft (20) is fixedly connected to a cooling fan (21) via a set shaft; One group of the first rotating shafts (20) is rotatably connected to the second fixed rod (5) via a provided shaft rod, and the other two groups of the first rotating shafts (20) are respectively rotatably connected to the second fixed plate (8) via provided shaft rods, and the three second gears (17) are all rotatably connected to the first mounting frame (9).

2. A self-cooling centrifugal pump according to claim 1, characterized in that: The outer wall of the first shaft (22) is fixedly connected to a transmission device, the transmission device comprising a cam (4), the outer wall of the cam (4) is slidably connected to a slider (31), the outer wall of the slider (31) is fixedly connected to a telescopic rod (25), the outer walls on both sides of the telescopic rod (25) are rotatably connected to fourth fixed plates (26), each of the fourth fixed plates (26) is fixedly connected to the pump body (12), the outer walls on both sides of the telescopic rod (25) away from the fourth fixed plate (26) are rotatably connected to two third fixed plates (24), and the outer walls of the two third fixed plates (24) are fixedly connected to scraping devices.

3. A self-cooling centrifugal pump according to claim 2, characterized in that: The scraping device comprises a push rod (27), the outer wall of the push rod (27) is slidably connected to a sealing rubber ring (34), the outer wall of the sealing rubber ring (34) is fixedly connected to a connecting piece (35), the outer wall of the connecting piece (35) is slidably connected to a first sealing cavity (28), the first sealing cavity (28) is fixedly connected to the water inlet (2), and one end of the connecting piece (35) away from the third fixed plate (24) is fixedly connected to a scraper (36).

4. A self-cooling centrifugal pump according to claim 3, characterized in that: The inner wall of the water inlet (2) is fixedly connected to a filter plate (37); the inner wall of the water inlet (2) is slidably connected to two symmetrically distributed second slide plates (43); the outer wall of each second slide plate (43) is fixedly connected to a plurality of evenly distributed springs (42); one end of each spring (42) away from the second slide plate (43) is fixedly connected to the inner wall of the water inlet (2); the inner wall of the water inlet (2) is slidably connected to a first slide plate (39); and the outer wall of the first slide plate (39) is fixedly connected to a sealing ring (38).

5. A self-cooling centrifugal pump according to claim 3, characterized in that: The bottom outer wall of the water inlet (2) is fixedly connected to a second sealing cavity (41), the inner wall of the second sealing cavity (41) is fixedly connected to a plurality of evenly distributed flexible bristles (40), the outer wall of the sealing rubber ring (34) is fixedly connected to a first fixing rod (3), both ends of the first fixing rod (3) are fixedly connected to connecting plates (13), an air bag (14) is arranged below each connecting plate (13), and each connecting plate (13) is fixedly connected to the air bag (14).

6. A self-cooling centrifugal pump according to claim 5, characterized in that: The outer wall of the air bag (14) is fixedly connected to a second cooling tube (29), the outer wall of the second cooling tube (29) is fixedly connected to the pump body (12), one end of the second cooling tube (29) away from the air bag (14) is fixedly connected to a breathable shell (30), the breathable shell (30) is fixedly connected to the pump body (12), the breathable shell (30) is rotatably connected to the outer wall of the first shaft (22), and the two ends of the first cooling tube (23) are respectively connected to the water outlet (10) and the pump body (12).

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