High-suction-height impeller type self-priming pump of bidirectional self-priming structure

Abstract

According to the high-suction-stroke impeller type self-priming pump of the two-way self-priming structure, an inner pump shell is arranged on the outer side of an impeller in an outer wrapping mode, water inlets are formed in the upper end and the lower end of the impeller, a water outlet is formed in the outer side of the impeller in an annular mode, and the water inlet in the upper end of the impeller communicates with the interior of a lower support through an impeller ring; a water inlet in the lower end of the impeller is communicated with a water inlet cavity in the bottom of the outer pump shell, an original single-face water inlet mode is improved into a mode that a water inlet pipe is divided into two, water inlets are formed in the upper end and the lower end of the impeller, a layer of inner pump shell is additionally arranged on the outer side of the impeller, and water flowing in from the two ends is pressurized and integrated; therefore, small net positive suction head can be effectively realized, the suction lift is greatly improved, and the suction lift can reach 8 meters under normal pressure.

Description

Technical Field

[0001] The present invention belongs to the technical field of self-priming pumps, and specifically relates to a high-suction-lift impeller self-priming pump with a bidirectional self-priming structure. Background Art

[0002] A self-priming pump is a general-purpose water pump. A centrifugal pump is provided with an impeller and a volute inside. The impeller can rotate inside the volute, and the fluid is "sucked in" and discharged from the volute through the rotation of the impeller. The self-priming performance of a self-priming pump has two indicators: self-priming height and self-priming time. The higher the self-priming height or the shorter the self-priming time, the better the self-priming performance is considered to be.

[0003] However, the self-priming pumps currently in use all use a spiral volute as the discharge chamber, which results in large hydraulic losses and low efficiency. At the same time, when the pump operating point deviates from the highest efficiency point, the unbalanced radial force can easily cause the vibration value of the pump to exceed the standard, increasing the noise and also affecting the service life of the pump. The contact area between the blades and the liquid is small. When the pump is initially working, the agitation in the pump body is poor, the gas-liquid mixing is poor, the gas discharge time is long, and the water supply speed is slow. Summary of the invention

[0004] In order to solve the above problems, this paper proposes a high-suction impeller self-priming pump with a two-way self-priming structure, wherein a water inlet pipe and a water outlet pipe are respectively arranged on the outside of the left and right sides of the self-priming pump, a motor is arranged on the top of the self-priming pump, a rotating shaft is arranged vertically below the motor, an impeller is fixedly arranged at the lower end of the rotating shaft, an inner pump casing is arranged on the outer side of the impeller, water inlets are arranged at the upper and lower ends of the impeller, a water outlet is arranged in the form of a ring on the outer side of the impeller, the water inlet at the upper end of the impeller is communicated with the inside of the lower bracket through the mouth ring, the water inlet at the lower end of the impeller is communicated with the bottom water inlet chamber of the outer pump casing, the lower bracket is sealed and arranged inside the outer pump casing, one side of the lower bracket is communicated with the water inlet pipe, the outer edge of the middle end of the lower bracket is fixedly connected to the top surface of the outer pump casing, the water inlet pipe is divided into two and communicates with the inside of the lower bracket and the water inlet chamber, and the center of the lower bracket is penetrated by a A rotating shaft, the bottom end of the rotating shaft is fixedly connected to the central axis of the impeller, a sealing assembly is provided on the outer side of the rotating shaft inside the lower bracket, the upper end of the sealing assembly is fixedly connected to the bottom surface of the lower bearing seat, the upper end of the lower bearing seat is fixedly connected to the top surface of the lower support, an upper bearing seat is provided on the upper part of the lower bearing seat, a rotating shaft is vertically penetrated between the upper bearing seat and the lower bearing seat, the rotating shaft is connected to the motor through a coupling, an upper bracket is provided on the outer side of the coupling, the original single-sided water inlet form is improved to a water inlet pipe divided into two for water inlet, and water inlets are provided at the upper and lower ends of the impeller, and an additional inner pump casing is provided on the outer side of the impeller to pressurize and integrate the water flowing in from both ends, so as to effectively achieve a small cavitation margin and greatly improve the suction range, which can reach 8 meters under normal pressure.

[0005] The outer pump casing is in the shape of a hollow circular tube, and a partition plate is horizontally arranged at the lower inner side of the outer pump casing. The lower part of the partition plate is the water inlet chamber, and the upper part of the partition plate is the water suction chamber. The center of the partition plate is connected with the impeller through the water inlet hole, and the outer side of the water inlet chamber is connected with the water inlet pipe, and the outer side of the water suction chamber is connected with the water outlet pipe. The bottom of the water suction chamber is fixedly provided with an inner pump casing, and through the upper and lower body-type outer pump casing, not only can the basic diversion and drainage be realized from the water outlet pipe, but also the water inlet at the lower end of the impeller can be realized through the water inlet chamber at the bottom, which is convenient for the conduction connection between the water inlet chamber and the water inlet pipe.

[0006] The shape of the inner pump casing is a disc-shaped hollow casing, and a lower bracket is fixedly plugged into the top of the inner pump casing, and the bottom center of the inner pump casing is communicated with the inside of the water inlet chamber through a partition plate, and a water flow outlet is provided on the outside of the inner pump casing, and the inner pump casing is communicated with the inside of the outer pump casing through the water flow conduction port, and an impeller is axially rotated inside the inner pump casing. The inner pump casing arranged on the outside of the impeller can not only centrally draw out the water after the impeller discharges, thereby effectively increasing the suction effect, but also support the rotation of the impeller, so that it is connected to the drainage bracket to ensure the directness and stability of the water inlet, and also achieve efficient low-resistance rotation.

[0007] The shape of the impeller is a hollow disc-shaped impeller, and an arc-shaped blade is horizontally arranged in the inner center of the impeller. An upper water inlet and a lower water inlet are respectively arranged at the upper and lower ends of the impeller shell, and an outer water outlet is arranged on the arc-shaped outer side of the impeller shell. A connecting central axis is arranged at the central bottom of the arc-shaped blade. The upper water inlet at the upper end of the impeller is axially rotatably connected to the inner seal of the lower bracket through a mouth ring, and the lower water inlet at the lower end of the impeller is axially rotatably connected to the bottom of the inner pump casing. Through the water inlets respectively arranged at the upper and lower ends of the impeller, efficient water flow convergence is achieved, which can greatly improve the influence of steam turbidity and increase the suction distance. The arc-shaped blade is arranged in the middle of the water outlet so that the gaps between the water inlets and the water outlets at the upper and lower ends are the same, thereby ensuring that the water flow through the upper and lower water inlets is the same, and ensuring the overall rotational stability of the impeller.

[0008] The shape of the lower bracket is a conical trumpet shape. The bottom of the lower bracket is plug-in fixedly connected to the top surface of the inner pump casing. A water inlet pipe is provided in a transverse conductive manner on the outer side of the top of the lower bracket. The lower part of the middle outer edge of the lower bracket is fixedly connected to the top surface of the outer pump casing. Through the conical lower bracket, the water inlet pipe can be drained to the upper end of the impeller, and the sealing separation of the inside of the outer pump casing can be achieved, which can maximize the volume of the small self-priming pump.

[0009] The sealing assembly includes a sealing body and a mechanical sealing ring. The sealing body is sealed and arranged in the middle of the rotating shaft. The inner side of the sealing body is annularly embedded with a mechanical sealing ring. The inner surface of the mechanical sealing ring is fixedly connected to the outer surface of the rotating shaft. The bottom end of the mechanical sealing ring is sealed and fitted to the inner bottom of the sealing body. The top end of the sealing body is fixedly connected to the bottom surface of the lower bearing seat. The sealing assembly is used to watertightly seal the lower bearing seat and the interior of the lower bracket, thereby ensuring that when water enters the lower bracket, water will not enter the lower bearing seat, which will cause rusting of the bearing, thereby ensuring the sealing of the overall pump.

[0010] The shape of the lower bearing seat is a concave groove plate bearing seat, and the lower bearing is embedded in the inner side of the bottom of the lower bearing seat. The upper end of the lower bearing seat is fixedly connected to the lower surface of the upper bearing seat, and the inner side of the upper bearing seat is embedded with an upper bearing. The upper bearing of the bearing seat is covered with a bearing cover, and a skeleton oil seal is provided between the inner side of the bearing cover and the upper bearing. Through the connection between the lower bearing seat and the upper bearing seat, the long rotating shaft can be given an efficient rotating support, thereby ensuring the stability of the overall self-priming pump, reducing noise and vibration.

[0011] The upper bracket is cylindrical in shape, the bottom surface of the upper bracket is fixedly connected to the top surface of the lower bracket, the bottom surface of the upper bracket and the top surface of the upper bracket are press-fitted with an upper bearing seat, and the top surface of the upper bracket is fixedly provided with a motor. The entire middle bearing seat is fixed by the combined press-fit design of the upper bracket and the lower bracket, which not only raises the position of the motor to ensure waterproofing, but also fully utilizes the installation space of the bearing seat to ensure that there is enough spacing between the bearing seat to arrange the upper bearing and the lower bearing, thereby realizing stable rotation of the rotating shaft.

[0012] The rotating shaft is in the shape of a cylindrical shaft, and the rotating shaft passes through the upper bracket, the bearing cover, the upper bearing, the upper bearing seat, the lower bearing, the lower bearing seat, the mechanical sealing ring, the sealing body and the lower bracket from top to bottom. The upper end of the rotating shaft is connected to the motor through a coupling in a keyway manner, and the lower end of the rotating shaft is connected to the impeller in a keyway manner. The impeller can rotate stably and efficiently at the bottom of the self-priming pump through the penetrating rotating shaft.

[0013] Beneficial effects:

[0014] The original single-sided water inlet form is improved to a water inlet pipe divided into two, and water inlets are set at the upper and lower ends of the impeller. An additional inner pump casing is also set on the outside of the impeller to pressurize and integrate the water flowing in from both ends, thereby effectively achieving a small cavitation margin and greatly improving the suction lift, which can reach 8 meters under normal pressure.

[0015] Through the upper and lower main body outer pump casing, not only can the basic diversion and discharge from the outlet pipe be achieved, but also the water inlet at the lower end of the impeller can be achieved through the water inlet chamber at the bottom, which facilitates the conduction connection between the water inlet chamber and the water inlet pipe.

[0016] The inner pump casing arranged on the outside of the impeller can not only centrally drain the water out of the impeller, thereby effectively increasing the suction effect, but also support the rotation of the impeller, connect it with the drainage bracket, ensure the directness and stability of the water inlet, and achieve efficient low-resistance rotation.

[0017] By providing water inlets at the upper and lower ends of the impeller, efficient water flow convergence can be achieved, which can greatly reduce the impact of steam turbidity and increase the suction distance. The arc blades are arranged in the middle of the water outlet so that the gaps between the water inlets and water outlets at the upper and lower ends are the same, thereby ensuring that the water flow through the upper and lower water inlets is the same, ensuring the overall rotational stability of the impeller.

[0018] Through the tapered lower bracket, the water inlet pipe can be drained to the upper end of the impeller, and the sealing separation of the inner part of the external pump casing can be achieved, which can maximize the volume of the small self-priming pump.

[0019] The sealing assembly is used to seal the lower bearing seat and the interior of the lower bracket to prevent water from entering the lower bearing seat during water entry into the lower bracket, thereby preventing water from entering the lower bearing seat and causing the bearing to rust, thereby ensuring the sealing of the entire pump.

[0020] By connecting the lower bearing seat and the upper bearing seat, the long rotating shaft can be given an efficient rotating support, thereby ensuring the stability of the overall self-priming pump, reducing noise and vibration.

[0021] The entire middle bearing seat is fixed by a combined press-fit design of the upper bracket and the lower bracket. Not only is the position of the motor elevated to ensure waterproofness, but it also fully utilizes the installation space of the bearing seat to ensure that there is enough spacing between the bearing seat to arrange the upper bearing and the lower bearing, thereby achieving stable rotation of the rotating shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a cross-sectional view of a high suction lift impeller self-priming pump with a bidirectional self-priming structure;

[0023] In the figure; 1, outer pump casing, 2, water inlet pipe, 3, water outlet pipe, 4, inner pump casing, 5, impeller, 6, mouth ring, 7, lower bracket, 8, sealing body, 9, mechanical sealing ring, 10, lower bearing seat, 11, lower bearing, 12, upper bearing seat, 13, upper bearing, 14, bearing gland, 15, skeleton oil seal, 16, upper bracket, 17, coupling, 18, motor, 19, rotating shaft. DETAILED DESCRIPTION

[0024] In order to deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with embodiments and drawings. The embodiments are only used to explain the present invention and do not constitute a limitation on the protection scope of the present invention.

[0025] Outer pump casing 1, water inlet pipe 2, water outlet pipe 3, inner pump casing 4, impeller 5, mouth ring 6, lower bracket 7, sealing body 8, mechanical sealing ring 9, lower bearing seat 10, lower bearing 11, upper bearing seat 12, upper bearing 13,

[0026] Bearing cover 14, skeleton oil seal 15, upper bracket 16, coupling 17, motor 18, rotating shaft 19.

[0027] like Figure 1 As shown;

[0028] A high suction lift impeller 5 self-priming pump with a bidirectional self-priming structure, wherein a water inlet pipe 2 and a water outlet pipe 3 are respectively arranged on the outside of the left and right sides of the self-priming pump, a motor 18 is arranged on the top of the self-priming pump, a rotating shaft 19 is arranged vertically below the motor 18, an impeller 5 is fixedly arranged at the lower end of the rotating shaft 19, an inner pump casing 4 is arranged on the outer side of the impeller 5, water inlets are arranged at the upper and lower ends of the impeller 5, a water outlet is arranged in the form of a ring on the outer side of the impeller 5, the water inlet at the upper end of the impeller 5 is communicated with the inside of the lower bracket 7 through the mouth ring 6, the water inlet at the lower end of the impeller 5 is communicated with the bottom water inlet chamber of the outer pump casing 1, the lower bracket 7 is sealed and arranged inside the outer pump casing 1, one side of the lower bracket 7 is communicated with the water inlet pipe 2, and the middle end outer edge of the lower bracket 7 is fixedly connected to the The top surface of the outer pump casing 1 is fixedly connected, the water inlet pipe 2 is divided into two parts and communicates with the inside of the lower bracket 7 and the water inlet chamber, the center of the lower bracket 7 is penetrated by a rotating shaft 19, the bottom end of the rotating shaft 19 is fixedly connected to the central axis of the impeller 5, the rotating shaft 19 is provided with a sealing assembly on the outside of the lower bracket 7, the upper end of the sealing assembly is fixedly connected to the bottom surface of the lower bearing 11 seat 10, the upper end of the lower bearing 11 seat 10 is fixedly connected to the top surface of the lower support, the upper bearing 13 seat 12 is covered above the lower bearing 11 seat 10, the rotating shaft 19 is vertically penetrated between the upper bearing 13 seat 12 and the lower bearing 11 seat 10, and the rotating shaft 19 is connected to the coupling 17 It is connected to the motor 18, and an upper bracket 16 is provided on the outer side of the coupling. The outer pump casing 1 is in the shape of a hollow round tube. A partition plate is horizontally provided on the lower inner side of the outer pump casing 1. The lower part of the partition plate is the water inlet chamber, and the upper part of the partition plate is the water suction chamber. The center of the partition plate is connected to the impeller 5 through the water inlet hole. The outer side of the water inlet chamber is connected to the water inlet pipe 2, and the outer side of the water suction chamber is connected to the water outlet pipe 3. The bottom of the water suction chamber is fixedly provided with an inner pump casing 4. The shape of the inner pump casing 4 is a disc-shaped hollow casing, and the top of the inner pump casing 4 is fixedly provided with a lower bracket 7. The bottom center of the inner pump casing 4 is connected to the inside of the water inlet chamber through the partition plate. A water flow outlet is provided on the outer side of the inner pump casing 4, and the inner pump casing 4 is connected to the outer pump casing 1 through the water flow outlet. The interiors are interconnected, and an impeller 5 is axially rotatably arranged inside the inner pump casing 4. The shape of the impeller 5 is a hollow disc-shaped impeller 5, and an arc-shaped blade is transversely arranged in the center of the impeller 5. An upper water inlet and a lower water inlet are respectively arranged at the upper and lower ends of the outer casing of the impeller 5, and an outer water outlet is arranged on the arc-shaped outer side of the outer casing of the impeller 5. A connecting central axis is arranged at the bottom of the center of the arc-shaped blades. The upper water inlet at the upper end of the impeller 5 is axially rotatably connected to the inner side sealing of the lower bracket 7 through a mouth ring 6, and the lower water inlet at the lower end of the impeller 5 is axially rotatably connected to the bottom of the inner pump casing 4. The shape of the lower bracket 7 is a conical trumpet shape, and the bottom of the lower bracket 7 is plug-in fixedly connected to the top surface of the inner pump casing 4, and a water inlet pipe 2 is transversely connected to the outer side of the top of the lower bracket 7.The lower part of the middle outer edge of the lower bracket 7 is fixedly connected to the top surface of the outer pump casing 1, and the sealing assembly includes a sealing body 8 and a mechanical sealing ring 9. The sealing body 8 is sealed and arranged in the middle of the rotating shaft 19. The inner side of the sealing body 8 is annularly embedded with a mechanical sealing ring 9. The inner surface of the mechanical sealing ring 9 is fixedly fitted and connected to the outer surface of the rotating shaft 19. The bottom end of the mechanical sealing ring 9 is sealed and fitted with the inner bottom of the sealing body 8. The top of the sealing body 8 is fixedly connected to the bottom surface of the lower bearing 11 seat 10. The shape of the lower bearing 11 seat 10 is a concave groove plate bearing seat. The lower bearing 11 seat 10 is embedded with a lower bearing 11 on the inner side of the bottom. The upper end of the lower bearing 11 seat 10 is fixedly fixedly connected to the lower surface of the upper bearing 13 seat 12. The inner side of the upper bearing 13 seat 12 is embedded with an upper shaft The upper bearing 13 of the bearing seat is covered with a bearing pressure cover 14, and a skeleton oil seal 15 is provided between the inner side of the bearing pressure cover 14 and the upper bearing 13. The upper bracket 16 is cylindrical in shape, and the bottom surface of the upper bracket 16 is fixedly connected to the top surface of the lower bracket 7. The bottom surface of the upper bracket 16 and the top surface of the upper bracket 16 are pressed together with the upper bearing 13 seat 12, and the top surface of the upper bracket 16 is fixedly provided with a motor 18. The shape of the rotating shaft 19 is a cylindrical shaft. The rotating shaft 19 passes through the upper bracket 16, the bearing pressure cover 14, the upper bearing 13, the upper bearing 13 seat 12, the lower bearing 11, the lower bearing 11 seat 10, the mechanical seal ring 9, the seal body 8 and the lower bracket 7 from top to bottom. The upper end of the rotating shaft 19 is keyed and connected to the motor 18 through a coupling, and the lower end of the rotating shaft 19 is keyed and connected to the impeller 5.

[0029] Implementation examples;

[0030] When in use, the impeller 5 is driven to rotate by the rotating shaft 19, and the upper water inlet and the lower water inlet at the upper and lower ends of the impeller 5 absorb water through the water inlet pipe 2. After the liquid enters the impeller 5, it is discharged from the outer water outlets on both sides through rotation, and enters the interior of the inner pump casing 4. It is further pressurized by the inner pump casing 4 and then discharged, thereby entering the interior of the outer pump casing 1, and finally directly discharged from the water outlet pipe 3 of the outer pump casing 1.

[0031] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A high suction lift impeller self-priming pump with a bidirectional self-priming structure, wherein a water inlet pipe and a water outlet pipe are respectively arranged on the outside of the left and right sides of the self-priming pump, a motor is arranged on the top of the self-priming pump, a rotating shaft is arranged vertically below the motor, and an impeller is fixedly arranged at the lower end of the rotating shaft, characterized in that: The outer side of the impeller is provided with an inner pump casing, the upper and lower ends of the impeller are provided with water inlets, the outer side of the impeller is provided with a water outlet in the form of a ring, the water inlet at the upper end of the impeller is communicated with the inside of the lower bracket through the mouth ring, the water inlet at the lower end of the impeller is communicated with the bottom water inlet chamber of the outer pump casing, the lower bracket is sealed and arranged inside the outer pump casing, one side of the lower bracket is communicated with the water inlet pipe, the middle end outer edge of the lower bracket is fixedly connected to the top surface of the outer pump casing, the water inlet pipe is divided into two parts and communicates with the inside of the lower bracket and the water inlet chamber, the lower bracket A rotating shaft is provided through the center, the bottom end of the rotating shaft is fixedly connected to the central axis of the impeller, a sealing assembly is provided on the outside of the rotating shaft inside the lower bracket, the upper end of the sealing assembly is fixedly connected to the bottom surface of the lower bearing seat, the upper end of the lower bearing seat is fixedly connected to the top surface of the lower support, an upper bearing seat is provided above the lower bearing seat, a rotating shaft is provided vertically through the upper and lower bearing seats, the rotating shaft is connected to the motor through a coupling, and an upper bracket is provided on the outside of the coupling.

2. According to claim 1, a high suction lift impeller self-priming pump with a bidirectional self-priming structure is characterized in that: The outer pump casing is shaped like a hollow circular tube, and a partition plate is horizontally arranged at the lower inner side of the outer pump casing. The lower part of the partition plate is the water inlet chamber, and the upper part of the partition plate is the water suction chamber. The center of the partition plate is connected to the impeller through the water inlet hole, the outer side of the water inlet chamber is connected to the water inlet pipe, and the outer side of the water suction chamber is connected to the water outlet pipe. The bottom of the water suction chamber is fixedly provided with an inner pump casing.

3. A high suction lift impeller self-priming pump with a bidirectional self-priming structure according to claim 2, characterized in that: The inner pump shell is in the shape of a disk-shaped hollow shell, the top of the inner pump shell is fixedly plugged with a lower bracket, the bottom center of the inner pump shell is connected to the inside of the water inlet chamber through a partition plate, the outer side of the inner pump shell is provided with a water flow outlet, the inner pump shell is connected to the inside of the outer pump shell through the water flow outlet, and the inner pump shell is axially rotated with an impeller.

4. The high suction lift impeller self-priming pump with a bidirectional self-priming structure according to claim 1 is characterized in that: The impeller is in the shape of a hollow disc-shaped impeller, with an arc-shaped blade arranged horizontally in the inner center of the impeller, an upper water inlet and a lower water inlet arranged at the upper and lower ends of the impeller shell respectively, an outer water outlet arranged on the arc-shaped outer side of the impeller shell, a connecting central axis arranged at the central bottom of the arc-shaped blade, the upper water inlet at the upper end of the impeller is axially rotatably connected to the inner side seal of the lower bracket through a mouth ring, and the lower water inlet at the lower end of the impeller is axially rotatably connected to the bottom of the inner pump shell.

5. The high suction lift impeller self-priming pump with a bidirectional self-priming structure according to claim 1 is characterized in that: The lower bracket is in the shape of a conical trumpet, the bottom of the lower bracket is plug-in fixedly connected to the top surface of the inner pump shell, the top outer side of the lower bracket is laterally conductively provided with a water inlet pipe, and the lower part of the middle outer edge of the lower bracket is fixedly connected to the top surface of the outer pump shell.

6. The high suction lift impeller self-priming pump with a bidirectional self-priming structure according to claim 1 is characterized in that: The sealing assembly includes a sealing body and a mechanical sealing ring. The sealing body is sealed and arranged in the middle of the rotating shaft. The inner side of the sealing body is annularly embedded with a mechanical sealing ring. The inner surface of the mechanical sealing ring is fixedly connected to the outer surface of the rotating shaft. The bottom end of the mechanical sealing ring is sealed and connected to the inner bottom of the sealing body. The top end of the sealing body is fixedly connected to the bottom surface of the lower bearing seat.

7. The high suction lift impeller self-priming pump with a bidirectional self-priming structure according to claim 1, characterized in that: The lower bearing seat is shaped as an inwardly concave groove plate bearing seat, a lower bearing is embedded in the inner side of the bottom of the lower bearing seat, the upper end of the lower bearing seat is fixedly connected to the lower surface of the upper bearing seat, an upper bearing is embedded in the inner side of the upper bearing seat, a bearing pressure cover is provided above the upper bearing of the bearing seat, and a skeleton oil seal is provided between the inner side of the bearing pressure cover and the upper bearing.

8. The high suction lift impeller self-priming pump with a bidirectional self-priming structure according to claim 1, characterized in that: The upper bracket is cylindrical in shape, the bottom surface of the upper bracket is fixedly connected to the top surface of the lower bracket, the bottom surface of the upper bracket and the top surface of the upper bracket are press-fitted with an upper bearing seat, and the top surface of the upper bracket is fixedly provided with a motor.

9. The high suction lift impeller self-priming pump with a bidirectional self-priming structure according to claim 1, characterized in that: The rotating shaft is in the shape of a cylindrical shaft, and the rotating shaft passes through the upper bracket, the bearing cover, the upper bearing, the upper bearing seat, the lower bearing, the lower bearing seat, the mechanical sealing ring, the sealing body and the lower bracket from top to bottom. The upper end of the rotating shaft is keyed to the motor through a coupling, and the lower end of the rotating shaft is keyed to the impeller.

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