Double-impeller full tubular pump

Abstract

The utility model relates to the technical field of water pumps, and discloses a double-impeller full tubular pump, which comprises a water suction port, a motor casing, a motor shaft, a guide vane body, impellers, an impeller sleeve and a bearing sleeve, the outer side of the water suction port is connected with the outer side of the front end of the motor casing through a flange, and the outer side of the rear end of the motor casing is connected with the outer side of the front end of the guide vane body through a flange. A front bearing chamber is fixed to the center of the water suction port through a plurality of connecting plates, a rear bearing chamber is fixed to the center of the guide vane body through a plurality of guide vanes, a roller bearing and a contact bearing are sequentially fixed in the front bearing chamber, a bearing front cover is fixed to the front end of the front bearing chamber, a contact bearing is fixed in the rear bearing chamber, and a bearing rear cover is fixed to the rear end of the rear bearing chamber. The front end of the motor shaft is installed in the roller bearing and the contact bearing in the front bearing chamber, and the rear end of the motor shaft is installed in the contact bearing in the rear bearing chamber. Drainage efficiency of the water pump can be improved, good cooling of the driving assembly is guaranteed, and the water pump is simple in overall structure and good in stability.

Description

Technical Field

[0001] This utility model relates to the field of water pump technology, and in particular to a double impeller full-flow pump. Background Technology

[0002] A cross-flow pump is a horizontal axial flow pump with low hydraulic loss and high water lifting efficiency. It can be used to transport clean water, sewage, and other fluid media, and is widely used in water supply and drainage, water treatment, irrigation, and flood control. Submersible cross-flow pumps include dry-type submersible cross-flow pumps and impeller-integrated submersible cross-flow pumps. The single impeller in a single-impeller-integrated submersible cross-flow pump limits its drainage efficiency due to the size limitations of the pump body structure.

[0003] There are also some existing technologies for dual-impeller submersible axial flow pumps, such as the one with application number CN202410098669.2, named a dual-stator dual-impeller water-filled submersible axial flow pump. It has two impellers and can be used in different power operation applications, improving the operating power factor and efficiency. However, it is driven by two separate sets of stators and rotors, which makes the size of the dual-impeller submersible axial flow pump larger and the structure more complex.

[0004] For example, the application number CN201610953306.8, entitled "A Coaxial Double Impeller Axial Flow Pump with Adjustable Front Impeller Blade Angle", has an adjustable front impeller blade angle, which can improve cavitation performance and regulation performance, significantly increase the working head, and reduce equipment cost and operating expenses. However, it is a dry submersible cross-flow pump, and the drive structure is located in the center of the pump. Utility Model Content

[0005] In order to overcome the shortcomings of the existing technology, the purpose of this utility model is to provide a double impeller full-flow pump that can improve the drainage efficiency of the pump, ensure good cooling of the drive components, and has a simple overall structure and good stability.

[0006] This utility model is achieved using the following technical solution: a double-impeller full-flow pump, comprising a suction port, a motor housing, a motor shaft, and a guide vane body, further comprising an impeller, a wheel sleeve, and a bearing sleeve. The outer side of the suction port is connected to the outer front end of the motor housing via a flange, and the outer rear end of the motor housing is connected to the outer front end of the guide vane body via a flange. A front bearing chamber is fixed to the center of the suction port via several connecting plates, and a rear bearing chamber is fixed to the center of the guide vane body via several guide vanes. Roller bearings and contact bearings are sequentially fixed in the front bearing chamber, a bearing front cover is fixed to the front end of the front bearing chamber, a contact bearing is fixed to the rear bearing chamber, and a bearing rear cover is fixed to the rear end of the rear bearing chamber. The front end of the motor shaft is installed in the roller bearing and contact bearing in the front bearing chamber, and the rear end of the motor shaft is installed in the contact bearing in the rear bearing chamber. There are two sets of impellers, each set of impellers having a wheel sleeve connected to its center, and the bearing sleeve is fixed to the center of the wheel sleeve. The motor shaft and the bearing sleeve are fixedly connected via a flat key. A drive assembly is provided inside the motor housing for driving the motor shaft to rotate.

[0007] Furthermore, the drive assembly includes a rotor, a stator, and a stator winding. The rear side of the water inlet, the front side of the guide vane, and the inner side of the motor housing form an annular mounting cavity. The stator is fixed in the annular mounting cavity, and a stator winding is wound on the stator. A rotor spacer is fixed on the outer side of the impeller, and the rotor is wound and fixed on the outer ring of the rotor spacer. The rotor is located inside the stator.

[0008] Furthermore, an organic seal seat is fixed inside the rear bearing chamber on the side opposite to the rear bearing cover for sealing the motor shaft.

[0009] Furthermore, a water guide cone is fixed inside the water inlet at the front end of the front bearing chamber, and a water guide cone is also fixed inside the guide vane at the rear end of the rear bearing chamber.

[0010] Furthermore, the motor housing is provided with a cable outlet, which communicates with the interior of the annular mounting cavity.

[0011] Furthermore, the bearing sleeve and the wheel sleeve are fixed together by an impeller lock nut.

[0012] Furthermore, a water inlet gasket groove is provided on the rear side of the water inlet, and a guide vane gasket groove is provided on the front side of the guide vane body. Sealing gaskets are provided in both the water inlet gasket groove and the guide vane body gasket groove.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. The present invention relates to a double impeller full-flow pump, in which the impeller blades are subjected to centrifugal force during impeller rotation, causing the liquid to be thrown out along the blade direction. At the same time, a low-pressure area is formed inside the impeller, causing the liquid to be drawn in. After passing through the impeller, the liquid's kinetic energy is converted into pressure energy due to the edge guidance and restriction of the outer edge of the impeller, and finally discharged. By setting the double impellers side by side, the drainage efficiency of the pump can be improved.

[0015] 2. The present invention relates to a double impeller full-flow pump, wherein the pump motor shaft and bearing are located in the center, and the rotor is wound and fixed on the outer ring of the rotor spacer, so that water flows between the rotor and the stator, which can better cool the drive components. Its overall structure is simple and has good stability. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0017] Figure 2 This is a cross-sectional view of the present invention;

[0018] Figure 3 This is a schematic diagram of the water intake structure in this utility model;

[0019] Figure 4 This is a schematic diagram of the guide vane body in this utility model;

[0020] Figure 5 This is a schematic diagram of the connection structure of the impeller, wheel sleeve and rotor spacer ring in this utility model.

[0021] In the diagram: Inlet-1; Guide cone-2; Bearing front cover-3; Roller bearing-4; Contact bearing-5; Impeller-6; Motor housing-7; Wheel sleeve-9; Bearing rear cover-10; Motor shaft-11; Mechanical seal seat-12; Guide vane body-13; Rear bearing chamber-14; Cable outlet-15; Impeller lock nut-16; Rotor-17; Stator-18; Stator winding-19; Bearing sleeve-20; Front bearing chamber-21; Rotor spacer-61; Connecting plate-101; Inlet washer groove-102; Guide vane body washer groove-131. Detailed Implementation

[0022] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other.

[0023] The purpose of this invention is to address the shortcomings of existing technologies by providing a dual-impeller full-flow pump.

[0024] Example 1

[0025] This embodiment provides a dual-impeller full-flow pump, referencing... Figures 1-2 As shown, the pump includes a suction port 1, an impeller 6, a motor housing 7, a wheel sleeve 9, a motor shaft 11, a guide vane body 13, and a bearing sleeve 20. The outer side of the suction port 1 is connected to the outer front end of the motor housing 7 via a flange, and the outer rear end of the motor housing 7 is connected to the outer front end of the guide vane body 13 via a flange. The suction port 1, the motor housing 7, and the guide vane body 13 constitute the main external structure of the cross-flow pump. A guide cone 2 is fixed inside the suction port 1 at the front end of the front bearing chamber 21, and a guide cone 2 is also fixed inside the guide vane body 13 at the rear end of the rear bearing chamber 14 to improve the water guiding effect. The front bearing chamber 21 is fixed to the center of the suction port 1 via several connecting plates 101, and the rear bearing chamber 14 is fixed to the center of the guide vane body 13 via several guide vanes. Roller bearings 4 and contact bearings 5 ​​are fixed sequentially inside the front bearing chamber 21. A bearing front cover 3 is fixed to the front end of the front bearing chamber 21. A contact bearing 5 is fixed inside the rear bearing chamber 14. A bearing rear cover 10 is fixed to the rear end of the rear bearing chamber 14. An organic seal seat 12 is fixed inside the rear bearing chamber 14 on the side opposite to the bearing rear cover 10 for sealing the motor shaft 11. The front end of the motor shaft 11 is installed in the roller bearings 4 and contact bearings 5 ​​inside the front bearing chamber 21, and the rear end of the motor shaft 11 is installed in the contact bearings 5 ​​inside the rear bearing chamber 14. There are two sets of impellers 6. A wheel sleeve 9 is connected to the center of each set of impellers 6. A bearing sleeve 20 is fixed to the center of the wheel sleeve 9. Specifically, the bearing sleeve 20 and the wheel sleeve 9 are connected and fixed by an impeller lock nut 16. The motor shaft 11 and the bearing sleeve 20 are fixedly connected by a flat key. A drive assembly is provided inside the motor housing 7 for driving the motor shaft 11 to rotate.

[0026] Reference Figures 3-4 As shown, a water inlet gasket groove 102 is provided on the rear side of the water inlet 1, and a guide vane gasket groove 131 is provided on the front side of the guide vane body 13. Sealing gaskets are provided in both the water inlet gasket groove 102 and the guide vane gasket groove 131 to improve the sealing between the water inlet 1, the guide vane body 13 and the motor housing 7.

[0027] Reference Figure 2 , Figure 5As shown, the drive assembly includes a rotor 17, a stator 18, and a stator winding 19. An annular mounting cavity is formed between the rear side of the suction port 1, the front side of the guide vane body 13, and the inner side of the motor housing 7. The stator 18 is fixed within this annular mounting cavity, and the stator winding 19 is wound around it. A rotor spacer 61 is fixed to the outer side of the impeller 6, and the rotor 17 is wound and fixed around the outer ring of the rotor spacer 61, located inside the stator 18. A wire outlet 15 is provided on the motor housing 7, communicating with the interior of the annular mounting cavity for routing the stator winding 19.

[0028] A dual-impeller full-flow pump operates as follows: the rotor 17 in the drive assembly rotates within the stator 18, driving the impeller 6 and motor shaft 11 to rotate rapidly within the front and rear bearings. The impeller 6 performs work; during its rotation, the impeller blades are subjected to centrifugal force, throwing liquid out along the blade direction. Simultaneously, a low-pressure area is formed inside the impeller 6, drawing in liquid. After passing through the impeller 6, the liquid's kinetic energy is converted into pressure energy due to the edge guidance of the impeller's outer edge, ultimately discharging from the guide vane body 13 into the pump body. The parallel arrangement of the two impellers improves the pump's drainage efficiency. The motor shaft 11 and bearings are centrally located, and the rotor 17 is wound and fixed around the outer ring of the rotor spacer 61, allowing water flow between the rotor 17 and the stator 18. This facilitates better cooling of the drive assembly. The overall structure is simple and exhibits good stability.

[0029] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A double-impeller full-flow pump, comprising a suction port (1), a motor housing (7), a motor shaft (11), and a guide vane (13), characterized in that: It also includes an impeller (6), a bushing (9), and a bearing bushing (20). The outer side of the water inlet (1) is connected to the outer front end of the motor housing (7) via a flange, and the outer rear end of the motor housing (7) is connected to the outer front end of the guide vane (13) via a flange. The water inlet (1) has a front bearing chamber (21) fixed in the center by several connecting plates (101). The guide vane body (13) has a rear bearing chamber (14) fixed in the center by several guide vanes. The front bearing housing (21) contains a roller bearing (4) and a contact bearing (5) in sequence, and a bearing front cover (3) is fixed to the front end of the front bearing housing (21). A contact bearing (5) is fixed inside the rear bearing housing (14), and a bearing rear cover (10) is fixed at the rear end of the rear bearing housing (14). The front end of the motor shaft (11) is installed in the roller bearing (4) and the contact bearing (5) in the front bearing housing (21), and the rear end of the motor shaft (11) is installed in the contact bearing (5) in the rear bearing housing (14). The impeller (6) has two sets, and each set of impellers (6) is connected to a wheel sleeve (9) in the center. The bearing sleeve (20) is fixed in the center of the wheel sleeve (9). The motor shaft (11) and the bearing sleeve (20) are fixedly connected by a flat key. The motor housing (7) is provided with a drive assembly for driving the motor shaft (11) to rotate.

2. The dual-impeller full-flow pump according to claim 1, characterized in that: The drive assembly includes a rotor (17), a stator (18), and a stator winding (19). The rear side of the water inlet (1), the front side of the guide vane body (13), and the inner side of the motor housing (7) form an annular mounting cavity. The stator (18) is fixed in the annular mounting cavity. The stator winding (19) is wound on the stator (18). A rotor spacer (61) is fixed on the outer side of the impeller (6). The rotor (17) is wound and fixed on the outer ring of the rotor spacer (61). The rotor (17) is located inside the stator (18).

3. The dual-impeller full-flow pump according to claim 1 or 2, characterized in that: The rear bearing chamber (14) is located on the side opposite to the bearing rear cover (10) and is fixed with an organic seal seat (12) for sealing the motor shaft (11).

4. The dual-impeller full-flow pump according to claim 1, characterized in that: A water guide cone (2) is fixed inside the water inlet (1) at the front end of the front bearing chamber (21), and a water guide cone (2) is also fixed inside the guide vane body (13) at the rear end of the rear bearing chamber (14).

5. The dual-impeller full-flow pump according to claim 2, characterized in that: The motor housing (7) is provided with a wire outlet (15), which is connected to the inside of the annular mounting cavity.

6. The dual-impeller full-flow pump according to claim 1, characterized in that: The bearing sleeve (20) and the wheel sleeve (9) are connected and fixed by an impeller lock nut (16).

7. The dual-impeller full-flow pump according to claim 1, characterized in that: A water inlet gasket groove (102) is provided on the rear side of the water inlet (1), and a guide vane gasket groove (131) is provided on the front side of the guide vane body (13). Sealing gaskets are provided in both the water inlet gasket groove (102) and the guide vane gasket groove (131).

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