Wear-resistant and damage-prevention high-speed water pump

Abstract

A wear-resisting and damage-preventing high-speed water pump comprises a water inlet seat and a motor arranged below the water inlet seat, a plurality of water inlet holes communicated with the inner space of the water inlet seat are formed in the outer wall of the water inlet seat, and the upper end of a motor shaft of the motor upwards penetrates into the water inlet seat and is connected with a rotating shaft which is provided with a plurality of impellers located above the water inlet seat. The impeller is covered with impeller shells matched with the impeller, the upper and lower adjacent impeller shells are overlapped, a water outlet shell is arranged on the upper side of the uppermost impeller shell, a water outlet is formed in the center of the upper end face of the water outlet shell, and the impeller shells are connected with the water inlet base through a plurality of pull belts which are evenly distributed in the circumferential direction. According to the wear-resisting and damage-preventing high-speed water pump, the rotating shaft can be effectively supported under the condition that the length of the rotating shaft bearing a plurality of impellers is large, meanwhile, the rotating smoothness of the rotating shaft can be guaranteed, the situation that the bearing is abraded can be effectively avoided, and the wear-resisting and damage-preventing effects are achieved.

Description

Technical Field

[0001] The utility model relates to a water pump, in particular to a wear-resistant and damage-proof high-speed water pump. Background Art

[0002] A water pump is a device for conveying water flow. When the water pump is operating, the motor of the water pump drives the impeller inside the impeller housing to rotate. At this time, the water inlet hole of the water inlet seat below the water pump generates suction, sucking the water flow into the impeller housing, and finally flowing out from the water outlet of the water outlet housing at the top of the water pump to achieve the conveyance of the water flow. In order to increase the lift of the water pump, the motor shaft of the motor is connected to a rotating shaft to extend the length of the motor shaft. At the same time, multiple impellers evenly distributed axially are arranged on the rotating shaft, and each impeller is covered with an impeller housing. The vertically distributed impeller housings are stacked on top of each other, and the stacked impeller housings are just located between the water inlet seat and the water outlet housing. At this time, the water inlet seat and the water outlet housing are connected by multiple straps evenly distributed in a circle to fasten the multiple impeller housings together.

[0003] In order to ensure the smoothness of the impeller rotation, bearings matching the rotating shaft are arranged outside both ends of the rotating shaft. Since the rotating shaft needs to carry multiple impellers, its length is relatively long and the pressure it bears is also large. Therefore, the pressure borne by the bearings supporting both ends of the rotating shaft is also relatively large, which easily leads to wear of the bearings. As the bearings wear, it not only easily causes the rotating shaft to shake during rotation, affecting the stability of the impeller rotation, but also causes the center position of the rotating shaft to shift, resulting in the impeller being eccentric. When the impeller is eccentric, the impeller is very likely to come into contact with the inner wall of the impeller housing, causing wear of the impeller. Summary of the Invention

[0004] The technical problem to be solved by the utility model is to provide a wear-resistant and damage-proof high-speed water pump, which can effectively support the rotating shaft when the length of the rotating shaft carrying multiple impellers is relatively long, and at the same time can ensure the smoothness of the rotating shaft during rotation, and can effectively avoid the wear of the bearings, achieving the effect of wear resistance and damage prevention.

[0005] The technical solution adopted by the utility model to solve the above technical problems is as follows:

[0006] The utility model discloses a wear-resistant and damage-proof high-speed water pump, which comprises a water inlet seat and a motor arranged below the water inlet seat. A plurality of water inlet holes communicating with the internal space thereof are arranged on the outer wall of the water inlet seat. The upper end of the motor shaft of the motor penetrates upward into the water inlet seat and is connected with a rotating shaft. A plurality of impellers located above the water inlet seat are arranged on the rotating shaft. An impeller housing matching with the impeller is sleeved outside the impeller. The upper and lower adjacent impeller housings are superposed with each other. A water outlet housing is arranged on the upper side of the impeller housing at the uppermost part. A water outlet is arranged at the center of the upper end face of the water outlet housing. The impeller housing and the water inlet seat are connected by a plurality of stay bands evenly distributed in a circumferential manner. A water passing hole communicating with the internal space of the water inlet seat is arranged at the center of the lower surface of the impeller housing at the lowermost part; a lower bearing seat is arranged at the center of the water passing hole; a plurality of lower support arms evenly distributed in a circumferential manner are arranged between the outer wall of the lower bearing seat and the inner wall of the water passing hole; a lower bearing hole is arranged at the center of the lower bearing seat; a lower graphite bearing matching with the lower bearing hole is arranged in the lower bearing hole; a lower ceramic bushing sleeved outside the lower end of the rotating shaft is arranged in the lower graphite bearing; the lower ceramic bushing is restricted in the lower graphite bearing by a lower limiting structure; an auxiliary housing is arranged between the water outlet housing and the impeller housing at the uppermost part; an upper bearing seat is arranged at the center of the auxiliary housing; a plurality of upper support arms evenly distributed in a circumferential manner are arranged between the outer wall of the upper bearing seat and the inner wall of the auxiliary housing; an upper bearing hole is arranged at the center of the upper bearing seat; an upper graphite bearing matching with the upper bearing hole is arranged in the upper bearing hole; an upper ceramic bushing sleeved outside the upper end of the rotating shaft is arranged in the upper graphite bearing; the upper ceramic bushing is restricted in the upper graphite bearing by an upper limiting structure.

[0007] The upper limiting structure comprises a screw hole arranged at the center of the upper end face of the rotating shaft; an annular limiting part extends inwards from the inner wall of the upper end port of the upper ceramic bushing; a limiting screw penetrates downward through the limiting part and is screwed in the screw hole, and the head of the limiting screw is attached to the upper surface of the limiting part; a washer sleeved outside the rotating shaft is arranged on the upper surface of the impeller at the uppermost part; an upper anti-wear sleeve sleeved outside the rotating shaft is arranged between the upper surface of the washer and the lower end face of the upper ceramic bushing; an anti-wear tube sleeved outside the rotating shaft is arranged between the upper and lower adjacent impellers; a plurality of strip-shaped protrusions evenly distributed in a circumferential manner are arranged on the outer wall of the rotating shaft; a connecting hole matching with the rotating shaft is arranged at the center of the impeller; a plurality of clamping grooves matching with the strip-shaped protrusions are arranged on the inner wall of the connecting hole.

[0008] The lower limit structure includes a connecting sleeve sleeved outside the lower end of the rotating shaft; an annular spline groove is provided on the inner wall of the lower end port of the connecting sleeve, the upper end of the motor shaft of the motor is embedded in the spline groove, and the upper end surface of the motor shaft of the motor is in contact with the upper side wall of the spline groove; an external spline is provided on the outer wall of the upper end of the motor shaft of the motor; an internal spline matching the external spline is provided on the inner wall of the spline groove; a jack radially penetrating through itself is provided at the lower end of the rotating shaft, and the jack is located below the lower ceramic bushing; limiting holes communicating with the jack are provided on the outer walls of the front and rear sides of the upper part of the connecting sleeve; a plug matching the jack is provided in the jack; the ends of the plug all extend outwards to the outside of the limiting holes; an annular groove is provided on the outer wall of the end of the plug; a snap ring matching the annular groove is provided in the annular groove, and the outer edge of the snap ring protrudes out of the annular groove; a lower wear-resistant sleeve sleeved outside the rotating shaft is provided between the upper end surface of the connecting sleeve and the lower end surface of the lower ceramic bushing; an auxiliary pipe sleeved outside the rotating shaft is provided between the upper end surface of the lower ceramic bushing and the lower surface of the lowermost impeller.

[0009] An annular positioning groove is provided on the outer wall of the lower graphite bearing; a positioning sleeve matching the positioning groove is provided in the positioning groove; a lower positioning portion fitting the lower surface of the lower bearing seat extends outwards from the outer wall of the lower end of the positioning sleeve; a pressing plate fitting the lower surface of the lower positioning portion extends outwards from the outer wall of the lower end of the lower graphite bearing.

[0010] A seat plate is provided inside the lower part of the water inlet seat; an annular limiting groove is provided on the seat plate; a tubular filter cylinder is provided between the lower surface of the impeller housing at the lowermost position and the limiting groove; a plurality of filter holes communicating with the internal space are provided on the outer wall of the filter cylinder; a supporting portion fitting the lower surface of the impeller housing at the lowermost position is provided on the outer wall of the upper end of the filter cylinder.

[0011] A plurality of accommodation grooves evenly distributed in a circumferential manner are provided on the inner wall of the upper graphite bearing.

[0012] A plurality of arc-shaped protrusions located between adjacent accommodation grooves are provided on the inner wall of the middle part of the upper graphite bearing; an annular guiding groove is provided on the outer wall of the upper ceramic bushing, and the arc-shaped protrusions protrude into the guiding groove; the height of the guiding groove is greater than the thickness of the arc-shaped protrusions.

[0013] The beneficial effects of the utility model are:

[0014] Compared with the prior art, when the motor shaft of the wear-resistant and damage-resistant high-speed water pump adopts the structure of the utility model, the shaft drives the upper ceramic sleeve to rotate in the upper graphite bearing, and drives the lower ceramic sleeve to rotate in the lower graphite bearing. When the shaft rotates at high speed, the shaft also rotates in the upper ceramic sleeve and the lower ceramic sleeve. The upper and lower ceramic sleeves increase the diameters of the upper and lower ends of the shaft in disguised form, thereby effectively improving the stability of the upper and lower ends of the shaft. The upper and lower ceramic sleeves have high wear resistance and high strength due to their own material characteristics, which can not only It helps the upper graphite bearing and the lower graphite bearing to support the upper and lower ends of the rotating shaft, and can avoid the wear of the inner wall of the rotating shaft due to long-term rotation through its own high wear resistance, and has the effect of wear resistance and damage prevention. The upper graphite bearing is sleeved on the outside of the upper ceramic sleeve, and the lower graphite bearing is sleeved on the outside of the lower ceramic sleeve. The upper graphite bearing and the lower graphite bearing have excellent self-lubricating properties. When the rotating shaft drives the upper ceramic sleeve and the lower ceramic sleeve to rotate, it can play a lubricating effect, effectively avoiding the wear of the outer wall of the upper ceramic sleeve and the lower ceramic sleeve due to long-term rotation, and has the effect of wear resistance and damage prevention.

[0015] Compared with the prior art, in the wear-resistant and damage-resistant high-speed water pump adopting the structure of the utility model, due to the self-lubricating properties of the upper graphite bearing and the lower graphite bearing, the friction between the outer wall of the upper ceramic sleeve and the inner wall of the upper graphite bearing, and the friction between the outer wall of the lower ceramic sleeve and the inner wall of the lower graphite bearing are much smaller than the friction between the outer wall of the rotating shaft and the inner wall of the upper ceramic sleeve, and the friction between the outer wall of the rotating shaft and the inner wall of the lower ceramic sleeve. This can effectively prevent the rotating shaft from rotating in the upper ceramic sleeve and the lower ceramic sleeve, causing wear on its own outer wall. When the outer wall of the rotating shaft, the upper ceramic sleeve and the lower ceramic sleeve are all wear-resistant, it can effectively prevent the rotating shaft from being eccentric due to wear, thereby preventing the eccentricity of the impeller from contacting and wearing the inner wall of the impeller casing. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a cross-sectional view of the wear-resistant and damage-resistant high-speed water pump of the utility model;

[0017] Figure 2 yes Figure 1 An enlarged view of part A;

[0018] Figure 3 yes Figure 1 An enlarged view of part B;

[0019] Figure 4 It is a partial cross-sectional view of the wear-resistant and damage-resistant high-speed water pump of the utility model;

[0020] Figure 5 It is a structural schematic diagram of the upper graphite bearing and the upper ceramic sleeve when assembled;

[0021] Figure 6 It is a schematic structural diagram when the upper end of the motor shaft of the motor is assembled with the connecting sleeve;

[0022] Figure 7 It is a schematic structural diagram when the rotating shaft is assembled with the impeller;

[0023] Figure 8 It is a three-dimensional view of the wear-resistant and damage-proof high-speed water pump of the present utility model. Specific embodiments

[0024] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0025] Please refer to Figures 1 to 8 , the present utility model provides a wear-resistant and damage-proof high-speed water pump, which includes a water inlet seat 1, a motor 2 arranged below the water inlet seat 1. A plurality of water inlet holes 3 communicating with the internal space are arranged on the outer wall of the water inlet seat 1. The upper end of the motor shaft 201 of the motor 2 penetrates upward into the water inlet seat 1 and is connected with a rotating shaft 4. A plurality of impellers 5 are arranged on the rotating shaft 4 above the water inlet seat 1. The impeller 5 is covered with an impeller housing 6 matching it. The adjacent impeller housings 6 are stacked on top of each other. A water outlet housing 7 is arranged on the upper side of the uppermost impeller housing 6. A water outlet 8 is arranged at the center of the upper end face of the water outlet housing 7. The impeller housing 6 and the water inlet seat 1 are connected by a plurality of pull belts 9 evenly distributed in a circle. A water passing hole 10 communicating with the internal space of the water inlet seat 1 is arranged at the center of the lower surface of the lowermost impeller housing 6; a lower bearing seat 11 is arranged at the center of the water passing hole 10; a plurality of lower support arms 12 evenly distributed in a circle are arranged between the outer wall of the lower bearing seat 11 and the inner wall of the water passing hole 10; a lower bearing hole 13 is arranged at the center of the lower bearing seat 11; a lower graphite bearing 14 matching it is arranged in the lower bearing hole 13; a lower ceramic shaft sleeve 15 sleeved outside the lower end of the rotating shaft 4 is arranged in the lower graphite bearing 14; the lower ceramic shaft sleeve 15 is restricted in the lower graphite bearing 14 by a lower limiting structure; an auxiliary housing 16 is arranged between the water outlet housing 7 and the uppermost impeller housing 6; an upper bearing seat 17 is arranged at the center of the auxiliary housing 16; a plurality of upper support arms 18 evenly distributed in a circle are arranged between the outer wall of the upper bearing seat 17 and the inner wall of the auxiliary housing 16; an upper bearing hole 19 is arranged at the center of the upper bearing seat 17; an upper graphite bearing 20 matching it is arranged in the upper bearing hole 19; an upper ceramic shaft sleeve 21 sleeved outside the upper end of the rotating shaft 4 is arranged in the upper graphite bearing 20; the upper ceramic shaft sleeve 21 is restricted in the upper graphite bearing 20 by an upper limiting structure.

[0026] The upper limit structure includes a screw hole 22 provided at the center of the upper end surface of the rotating shaft 4; an annular limiting portion 23 extends inward from the inner wall of the upper end port of the upper ceramic bushing 21; a limiting screw 24 passes downward through the limiting portion 23 and is screwed into the screw hole 22, and the head of the limiting screw 24 is in contact with the upper surface of the limiting portion 23; a washer 25 sleeving the rotating shaft 4 is provided on the upper surface of the impeller 5 at the uppermost side; an upper anti-wear sleeve 26 sleeving the rotating shaft 4 is provided between the upper surface of the washer 25 and the lower end surface of the upper ceramic bushing 21; an anti-wear tube 27 sleeving the rotating shaft 4 is provided between adjacent impellers 5 up and down; a plurality of strip-shaped protrusions 28 are evenly distributed in a circumferential manner on the outer wall of the rotating shaft 4; a connection hole 29 matching the rotating shaft 4 is provided at the center of the impeller 5; a plurality of clamping grooves 30 matching the strip-shaped protrusions 28 are provided on the inner wall of the connection hole 29.

[0027] The lower limit structure includes a connection sleeve 31 sleeving the lower end of the rotating shaft 4; an annular spline groove 32 is provided on the inner wall of the lower end port of the connection sleeve 31, and the upper end of the motor shaft 201 of the motor 2 is embedded in the spline groove 32, and the upper end surface of the motor shaft 201 of the motor 2 is in contact with the upper side wall of the spline groove 32; an external spline 33 is provided on the outer wall of the upper end of the motor shaft 201 of the motor 2; an internal spline 34 matching the external spline 33 is provided on the inner wall of the spline groove 32; a jack 35 radially penetrating itself is provided at the lower end of the rotating shaft 4, and the jack 35 is located below the lower ceramic bushing 15; limiting holes 36 communicating with the jack 35 are provided on the outer walls of the front and rear sides of the upper part of the connection sleeve 31; a plug pin 37 matching the jack 35 is provided in the jack 35; the ends of the plug pin 37 all extend outward to the outside of the limiting holes 36; an annular groove 38 is provided on the outer wall of the end of the plug pin 37; a snap ring 39 matching the annular groove 38 is provided in the annular groove 38, and the outer edge of the snap ring 39 protrudes out of the annular groove 38; a lower anti-wear sleeve 40 sleeving the rotating shaft 4 is provided between the upper end surface of the connection sleeve 31 and the lower end surface of the lower ceramic bushing 15; an auxiliary tube 41 sleeving the rotating shaft 4 is provided between the upper end surface of the lower ceramic bushing 15 and the lower surface of the impeller 5 at the lowermost side.

[0028] An annular positioning groove 42 is provided on the outer wall of the lower graphite bearing 14; a positioning sleeve 43 matching the positioning groove 42 is provided in the positioning groove 42; a lower positioning portion 44 in contact with the lower surface of the lower bearing seat 11 extends outward from the outer wall of the lower end of the positioning sleeve 43; a pressing plate 45 in contact with the lower surface of the lower positioning portion 44 extends outward from the outer wall of the lower end of the lower graphite bearing 14.

[0029] A seat plate 46 is provided in the lower part of the water inlet seat 1; an annular limiting groove 47 is provided on the seat plate 46; a tubular filter cartridge 48 is provided between the lower surface of the impeller housing 6 located at the bottom and the limiting groove 47; the outer wall of the filter cartridge 48 is provided with a plurality of filter holes 49 which are connected with the internal space thereof; the outer wall of the upper end of the filter cartridge 48 is provided with a supporting portion 50 which is in contact with the lower surface of the impeller housing 6 located at the bottom.

[0030] The inner wall of the upper graphite bearing 20 is provided with a plurality of accommodating grooves 51 evenly distributed around the circumference.

[0031] The inner wall of the middle part of the upper graphite bearing 20 is provided with a plurality of arc-shaped protrusions 52 located between adjacent accommodating grooves 51 ; the outer wall of the upper ceramic sleeve 21 is provided with an annular guide groove 53 , into which the arc-shaped protrusions 52 protrude; the height of the guide groove 53 is greater than the thickness of the arc-shaped protrusions 52 .

[0032] The method of using the utility model is as follows:

[0033] When the motor shaft 201 of the motor 2 drives the rotating shaft 4 to rotate, the rotating shaft 4 will drive the upper ceramic sleeve 21 to rotate in the upper graphite bearing 20, and drive the lower ceramic sleeve 15 to rotate in the lower graphite bearing 14. When the rotating shaft 4 rotates at a high speed, the rotating shaft 4 will also rotate in the upper ceramic sleeve 21 and the lower ceramic sleeve 15. The upper ceramic sleeve 21 and the lower ceramic sleeve 15 increase the diameters of the upper and lower ends of the rotating shaft 4 in disguised form, thereby effectively improving the stability of the upper and lower ends of the rotating shaft 4. The upper ceramic sleeve 21 and the lower ceramic sleeve 15 have high wear resistance and high strength due to their own material characteristics, which can not only help the upper graphite bearing 20 and The lower graphite bearing 14 supports the upper and lower ends of the rotating shaft 4, and can avoid the wear of the inner wall of the rotating shaft 4 due to long-term rotation through its own high wear resistance, and has the effect of wear resistance and damage prevention. The upper graphite bearing 20 is sleeved on the outside of the upper ceramic sleeve 21, and the lower graphite bearing 14 is sleeved on the outside of the lower ceramic sleeve 15. The upper graphite bearing 20 and the lower graphite bearing 14 have excellent self-lubricating properties. When the rotating shaft 4 drives the upper ceramic sleeve 21 and the lower ceramic sleeve 15 to rotate, it can have a lubricating effect, effectively avoiding the wear of the outer wall of the upper ceramic sleeve 21 and the lower ceramic sleeve 15 due to long-term rotation, and has the effect of wear resistance and damage prevention.

[0034] Under the self-lubricating performance of the upper graphite bearing 20 and the lower graphite bearing 14, the frictional force between the outer wall of the upper ceramic bushing 21 and the inner wall of the upper graphite bearing 20, and the frictional force between the outer wall of the lower ceramic bushing 15 and the inner wall of the lower graphite bearing 14 are much smaller than the frictional force between the outer wall of the rotating shaft 4 and the inner wall of the upper ceramic bushing 21, and the frictional force between the outer wall of the rotating shaft 4 and the inner wall of the lower ceramic bushing 15. It can effectively avoid the situation that the outer wall of the rotating shaft 4 is worn due to rotation in the upper ceramic bushing 21 and the lower ceramic bushing 15. When the outer wall of the rotating shaft 4, the upper ceramic bushing 21, and the lower ceramic bushing 15 are all wear-resistant, it can effectively avoid the situation that the rotating shaft 4 is eccentric due to wear, thereby avoiding the situation that the impeller 5 is eccentric and contacts and wears the inner wall of the impeller housing 6.

[0035] A number of strip-shaped protrusions 28 are evenly distributed in a circle on the outer wall of the rotating shaft 4. A connection hole 29 matching the rotating shaft 4 is provided in the center of the impeller 5. A number of clamping grooves 30 matching the strip-shaped protrusions 28 are provided on the inner wall of the connection hole 29. The existence of the strip-shaped protrusions 28 enables the rotating shaft 4 to be engaged with the impeller 5, thereby realizing the synchronous rotation of the rotating shaft 4 and the impeller 5, ensuring the consistency of the rotation of all impellers 5, and thus ensuring the stability of the impeller 5 when conveying water flow.

[0036] An annular limiting portion 23 extends inward from the inner wall of the upper end port of the upper ceramic bushing 21. A limiting screw 24 passes downward through the limiting portion 23 and is screwed into the screw hole 22. The head of the limiting screw 24 is in contact with the upper surface of the limiting portion 23. The existence of the limiting screw 24 can fasten the upper ceramic bushing 21, the washer 25, the upper anti-wear sleeve 26, the anti-wear pipe 27, the lower anti-wear sleeve 40, the auxiliary pipe 41, and the lower ceramic bushing 15 outside the rotating shaft 4. Thus, when the rotating shaft 4 rotates, the synchronous rotation of the upper ceramic bushing 21, the washer 25, the upper anti-wear sleeve 26, the anti-wear pipe 27, the lower anti-wear sleeve 40, the auxiliary pipe 41, and the lower ceramic bushing 15 is realized, avoiding the situation that the inner wall of the rotating shaft 4 is worn due to rotation inside it. Moreover, the fastening method of the upper ceramic bushing 21, the washer 25, the upper anti-wear sleeve 26, the anti-wear pipe 27, the lower anti-wear sleeve 40, the auxiliary pipe 41, and the lower ceramic bushing 15 by the limiting screw 24 is convenient for disassembly and assembly, thus facilitating the maintenance and replacement of components.

[0037] The lower limit structure includes a connecting sleeve 31 sleeved outside the lower end of the rotating shaft 4. An annular spline groove 32 is provided on the inner wall of the lower end port of the connecting sleeve 31. The upper end of the motor shaft 201 of the motor 2 is embedded in the spline groove 32. The upper end face of the motor shaft 201 of the motor 2 is in contact with the upper side wall of the spline groove 32. An external spline 33 is provided on the outer wall of the upper end of the motor shaft 201 of the motor 2, and an internal spline 34 matching the external spline 33 is provided on the inner wall of the spline groove 32. A jack 35 radially penetrating itself is provided at the lower end of the rotating shaft 4. The jack 35 is located below the lower ceramic bushing 15. Limiting holes 36 communicating with the jack 35 are provided on the front and rear outer walls of the upper part of the connecting sleeve 31. A plug pin 37 matching the jack 35 is provided in the jack 35. The ends of the plug pin 37 all extend outwards to the outside of the limiting holes 36. An annular groove 38 is provided on the outer wall of the end of the plug pin 37, and a snap ring 39 matching the annular groove 38 is provided in the annular groove 38. The outer edge of the snap ring 39 protrudes out of the annular groove 38. The connection mode that the upper end of the motor shaft 201 of the motor 2 and the lower end of the rotating shaft 4 are connected through the connecting sleeve 31 can not only ensure the stability when the motor shaft 201 of the motor 2 is connected to the rotating shaft 4, but also facilitate the disassembly and assembly of the two.

[0038] An annular positioning groove 42 is provided on the outer wall of the lower graphite bearing 14. A positioning sleeve 43 matching the positioning groove 42 is provided in the positioning groove 42. A lower positioning portion 44 extending outwards and fitting with the lower surface of the lower bearing seat 11 is provided on the outer wall of the lower end of the positioning sleeve 43. A pressing plate 45 extending outwards and fitting with the lower surface of the lower positioning portion 44 is provided on the outer wall of the lower end of the lower graphite bearing 14. The existence of the positioning sleeve 43 can equivalently increase the installation area of the inner wall of the lower bearing hole 13, effectively improving the stability of the lower graphite bearing 14.

[0039] A seat plate 46 is provided inside the lower part of the water inlet seat 1. An annular limiting groove 47 is provided on the seat plate 46. A tubular filter cartridge 48 is provided between the lower surface of the lowermost impeller housing 6 and the limiting groove 47. A number of filter holes 49 communicating with the internal space are provided on the outer wall of the filter cartridge 48. A supporting portion 50 fitting with the lower surface of the lowermost impeller housing 6 is provided on the outer wall of the upper end of the filter cartridge 48. The filter cartridge 48 can filter impurities in the water flow entering the impeller housing 6 from the outside, preventing impurities from entering the impeller housing 6, and thus avoiding the situation that impurities enter the gaps between the inner wall of the upper graphite bearing 20 and the outer wall of the upper ceramic bushing 21, the gaps between the inner wall of the lower graphite bearing 14 and the outer wall of the lower ceramic bushing 15, the gaps between the inner wall of the upper ceramic bushing 21 and the outer wall of the rotating shaft 4, and the gaps between the inner wall of the lower ceramic bushing 15 and the outer wall of the rotating shaft 4, resulting in increased wear.

[0040] The inner wall of the upper graphite bearing 20 is provided with a plurality of receiving grooves 51 that are evenly distributed in a circumferential manner. If impurities enter the gap between the inner wall of the upper graphite bearing 20 and the outer wall of the upper ceramic bushing 21, the impurities will be squeezed into the receiving grooves 51 under the rotation of the upper ceramic bushing 21, and finally discharged from the receiving grooves 51 to the outside of the gap between the inner wall of the upper graphite bearing 20 and the outer wall of the upper ceramic bushing 21, avoiding the situation that the wear between the inner wall of the upper graphite bearing 20 and the outer wall of the upper ceramic bushing 21 is aggravated due to the presence of impurities.

[0041] The inner wall of the middle part of the upper graphite bearing 20 is provided with a plurality of arc-shaped protrusions 52 located between adjacent receiving grooves 51. The outer wall of the upper ceramic bushing 21 is provided with an annular guide groove 53. The arc-shaped protrusions 52 protrude into the guide groove 53. Under the guidance of the arc-shaped protrusions 52, the upper ceramic bushing 21 can always maintain a coaxial state with the upper graphite bearing 20, effectively ensuring the stability of the upper ceramic bushing 21 when rotating in the upper graphite bearing 20. And the height of the guide groove 53 is greater than the thickness of the arc-shaped protrusions 52. Therefore, there is an active spacing between the upper and lower groove walls of the guide groove 53 and the arc-shaped protrusions 52, facilitating the adjustment and fixation of the position of the upper ceramic bushing 21 by the limit screw 24.

Claims

1. A wear-resistant and damage-proof high-speed water pump, comprising a water inlet seat, a motor arranged below the water inlet seat, a plurality of water inlet holes penetrating through the outer wall of the water inlet seat and communicating with its internal space, the upper end of the motor shaft of the motor penetrates upward into the water inlet seat and is connected with a rotating shaft, a plurality of impellers located above the water inlet seat are arranged on the rotating shaft, the impellers are covered with impeller housings matching them, the adjacent impeller housings are stacked on top of each other, a water outlet housing is arranged on the upper side of the impeller housing at the uppermost position, a water outlet is arranged at the center of the upper end face of the water outlet housing, and the impeller housing is connected with the water inlet seat through a plurality of tension belts evenly distributed in a circumferential manner, and is characterized in that: A water passing hole communicating with the internal space of the water inlet seat is provided at the center of the lower surface of the impeller housing at the bottom; a lower bearing seat is provided at the center of the water passing hole; several lower support arms evenly distributed in a circle are provided between the outer wall of the lower bearing seat and the inner wall of the water passing hole; a lower bearing hole is provided at the center of the lower bearing seat; a lower graphite bearing matching with the lower bearing hole is provided in the lower bearing hole; a lower ceramic bushing sleeved outside the lower end of the rotating shaft is provided in the lower graphite bearing; the lower ceramic bushing is restricted in the lower graphite bearing by a lower limiting structure; an auxiliary housing is provided between the water outlet housing and the impeller housing at the uppermost side; an upper bearing seat is provided at the center of the auxiliary housing; several upper support arms evenly distributed in a circle are provided between the outer wall of the upper bearing seat and the inner wall of the auxiliary housing; an upper bearing hole is provided at the center of the upper bearing seat; an upper graphite bearing matching with the upper bearing hole is provided in the upper bearing hole; an upper ceramic bushing sleeved outside the upper end of the rotating shaft is provided in the upper graphite bearing; the upper ceramic bushing is restricted in the upper graphite bearing by an upper limiting structure.

2. The wear-resistant and damage-proof high-speed water pump according to claim 1, characterized in that: The upper limiting structure includes a screw hole provided at the center of the upper end face of the rotating shaft; a ring-shaped limiting portion extends inward from the inner wall of the upper end port of the upper ceramic bushing; a limiting screw passes downward through the limiting portion and is screwed into the screw hole, and the head of the limiting screw fits with the upper surface of the limiting portion; a washer sleeved outside the rotating shaft is provided on the upper surface of the impeller at the uppermost side; an upper anti-wear sleeve sleeved outside the rotating shaft is provided between the upper surface of the washer and the lower end face of the upper ceramic bushing; an anti-wear tube sleeved outside the rotating shaft is provided between adjacent upper and lower impellers; several strip-shaped protrusions evenly distributed in a circle are provided on the outer wall of the rotating shaft; a connection hole matching with the rotating shaft is provided at the center of the impeller; several clamping grooves matching with the strip-shaped protrusions are provided on the inner wall of the connection hole.

3. The wear-resistant and damage-proof high-speed water pump according to claim 2, wherein: The lower limiting structure includes a connection sleeve sleeved outside the lower end of the rotating shaft; an annular spline groove is provided on the inner wall of the lower end port of the connection sleeve, and the upper end of the motor shaft of the motor is embedded in the spline groove, and the upper end face of the motor shaft of the motor fits with the upper side groove wall of the spline groove; external splines are provided on the outer wall of the upper end of the motor shaft of the motor; internal splines matching with the external splines are provided on the inner wall of the spline groove; a jack radially penetrating through itself is provided at the lower end of the rotating shaft, and the jack is located below the lower ceramic bushing; limiting holes communicating with the jack are provided on the outer walls of the front and rear sides of the upper part of the connection sleeve; a plug matching with the jack is provided in the jack; the ends of the plug all extend outward to the outside of the limiting holes; an annular groove is provided on the outer wall of the end of the plug; a snap ring matching with the annular groove is provided in the annular groove, and the outer edge of the snap ring protrudes outside the annular groove; a lower anti-wear sleeve sleeved outside the rotating shaft is provided between the upper end face of the connection sleeve and the lower end face of the lower ceramic bushing; an auxiliary tube sleeved outside the rotating shaft is provided between the lower end face of the lower ceramic bushing and the lower surface of the impeller at the bottom.

4. The wear-resistant and damage-proof high-speed water pump according to claim 3, wherein: An annular positioning groove is provided on the outer wall of the lower graphite bearing; a positioning sleeve matching with the positioning groove is provided in the positioning groove; a lower positioning portion fitting with the lower surface of the lower bearing seat extends outward from the outer wall of the lower end of the positioning sleeve; a pressing plate fitting with the lower surface of the lower positioning portion extends outward from the outer wall of the lower end of the lower graphite bearing.

5. A wear-resistant and damage-proof high-speed water pump according to claim 1, characterized in that: A seat plate is provided inside the lower part of the water inlet seat; an annular limiting groove is provided on the seat plate; a tubular filter cylinder is provided between the lower surface of the lowermost impeller housing and the limiting groove; a plurality of filter holes communicating with the internal space are provided on the outer wall of the filter cylinder; a supporting part fitting the lower surface of the lowermost impeller housing is provided on the upper end outer wall of the filter cylinder.

6. A wear-resistant and damage-proof high-speed water pump according to claim 1, characterized in that: A plurality of accommodating grooves evenly distributed in a circumferential direction are provided on the inner wall of the upper graphite bearing.

7. The wear-resistant and damage-proof high-speed water pump according to claim 6, characterized in that: A plurality of arc-shaped protrusions located between adjacent accommodating grooves are provided on the inner wall of the middle part of the upper graphite bearing; an annular guiding groove is provided on the outer wall of the upper ceramic shaft sleeve, and the arc-shaped protrusions protrude into the guiding groove; the height of the guiding groove is greater than the thickness of the arc-shaped protrusions.

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