Linear water pump adopting double-output-shaft motor

Abstract

The utility model provides a linear water pump adopting a double-output-shaft motor, and belongs to the technical field of water pump instruments. The problem that the axial force of the motor output shaft of the multi-stage pump is difficult to solve is solved. The centrifugal pump comprises a centrifugal pump body and a motor, a sealing cavity used for containing the motor is formed in the centrifugal pump body, the motor is provided with a first output shaft and a second output shaft, the directions of the first output shaft and the second output shaft are opposite, and the centrifugal pump body is provided with a water inlet, a water outlet, a first impeller set and a second impeller set. The water inlet and the water outlet are formed in the two ends of the centrifugal pump body respectively, the first impeller set is arranged on the first output shaft, the second impeller set is arranged on the second output shaft, the first impeller set is used for guiding liquid at the water inlet to the second impeller set, and the second impeller set is used for guiding the liquid from the first impeller set to the water outlet. The utility model has the advantage of solving the axial force problem of the output shaft of the water pump motor.

Description

Technical Field

[0001] This utility model belongs to the field of water pump technology, and specifically relates to a linear water pump using a dual-output shaft motor. Background Technology

[0002] Centrifugal pumps transport liquids by generating centrifugal force through impeller rotation, and are suitable for various fluid transport needs. Single-stage centrifugal pumps have a simple structure and are suitable for low-head applications; while multi-stage centrifugal pumps, through multiple impellers connected in series, can achieve high head and large flow rate, while maintaining high efficiency and a wide operating range. Multi-stage centrifugal pumps have a compact design, strong adaptability, and are widely used in high-rise water supply, industrial processes, and fire protection systems.

[0003] Axial force is a critical research issue in the field of centrifugal pumps, as its imbalance can exacerbate bearing wear and lead to serious consequences such as pump malfunction. During pump operation, the rotor is subjected to axial force, which tends to cause the rotor to move axially. Therefore, to ensure the normal operation of the pump, effective measures must be taken to eliminate or balance this axial force. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned problems in the existing technology by providing a linear water pump employing a dual-output shaft motor.

[0005] The objective of this utility model can be achieved through the following technical solution: A linear water pump using a dual-output-shaft motor, comprising a centrifugal pump body and a motor, wherein the centrifugal pump body is provided with a sealed cavity for accommodating the motor, the motor is provided with a first output shaft and a second output shaft, the first output shaft and the second output shaft being in opposite directions, the centrifugal pump body is provided with an inlet, an outlet, a first impeller assembly and a second impeller assembly, the inlet and the outlet being respectively located at both ends of the centrifugal pump body, the first impeller assembly being located on the first output shaft, the second impeller assembly being located on the second output shaft, the first impeller assembly being used to guide the liquid at the inlet to the second impeller assembly, and the second impeller assembly being used to guide the liquid from the first impeller assembly to the outlet.

[0006] The working principle of this utility model is as follows: Liquid enters the centrifugal pump body from the inlet. The first impeller group rotates, which transports the liquid to the second impeller group. At the same time, the second impeller group rotates, which transports the liquid from the first impeller group to the outlet. This application uses a dual-shaft motor and sets opposite impeller groups on the first and second output shafts, thereby offsetting the axial force and achieving a pressurization effect. In addition, this design reduces the length of a single motor output shaft and reduces the pressure on the motor output shaft.

[0007] In the linear water pump with dual output shaft motors described above, both the first impeller assembly and the second impeller assembly are equipped with at least one impeller.

[0008] In the aforementioned linear water pump employing a dual-output-shaft motor, when both the first impeller group and the second impeller group are equipped with one impeller, the impeller of the first impeller group is a guide vane impeller, and the impeller of the second impeller group is a volute impeller. When both the first impeller group and the second impeller group are equipped with at least two impellers, the impellers of the first impeller group are all guide vane impellers, and the second impeller group includes one volute impeller and at least one guide vane impeller.

[0009] In the linear water pump with a dual-output shaft motor described above, the volute impeller is located at one end near the sealing cavity.

[0010] In the linear water pump described above that uses a dual-output-shaft motor, the cross-sectional shape of the volute impeller is a helical involute.

[0011] In the aforementioned linear water pump employing a dual-output-shaft motor, the centrifugal pump body includes a first pump casing, a first pump cover, and a second pump cover. The first pump casing includes an inlet end and an outlet end. The first pump cover is used to seal the inlet end, and the second pump cover is used to seal the outlet end. The inlet is located on the first pump cover, and the outlet end is located on the second pump cover. The inlet end is used for mounting the first impeller assembly and the motor. The outlet end is provided with a second pump casing and a third pump cover. The second pump casing is used for storing the second impeller assembly, and the interior of the second pump casing is connected to the inlet end.

[0012] In the aforementioned linear water pump employing a dual-output-shaft motor, a first water flow channel is provided in the inlet end. The first water flow channel is used to allow liquid to enter the second pump casing from the first impeller assembly. A second water flow channel is provided between the second pump casing and the second impeller assembly. The second water flow channel is connected to the first water flow channel and is used to allow liquid to flow from the first water flow channel to the second impeller assembly. A third water flow channel is provided between the second pump casing and the outlet end. The third water flow channel is used to allow liquid to flow from the second impeller assembly to the outlet.

[0013] In the aforementioned linear water pump employing a dual-output shaft motor, a plurality of connecting columns are provided in the first water flow channel, the connecting columns being used to connect the water inlet end and the sealing cavity. A support block for supporting the second impeller assembly is provided on the second pump casing, the support block being provided with a plurality of through holes, the through holes being used to connect the first water flow channel and the second water flow channel.

[0014] In the linear water pump with dual output shaft motors described above, a connecting pipe is also provided on the support block. The connecting pipe is used to connect the second impeller assembly and the third water flow channel, and the connecting pipe is located near the sealing cavity.

[0015] Compared with the prior art, this utility model has the advantage of solving the problem of axial force on the output shaft of a water pump motor. Attached Figure Description

[0016] Figure 1 is a structural schematic diagram of this utility model.

[0017] Figure 2 is a cross-sectional structural diagram of this utility model.

[0018] Figure 3 is a cross-sectional structural diagram of the volute impeller of this utility model.

[0019] Figure 4 is a structural schematic diagram of the first impeller assembly of this utility model.

[0020] Figure 5 is a structural schematic diagram of the second impeller assembly of this utility model.

[0021] In the diagram, 1. Centrifugal pump body; 2. Motor; 3. Sealing cavity; 4. First output shaft; 5. Second output shaft; 6. Inlet; 7. Outlet; 8. First impeller assembly; 9. Second impeller assembly; 10. Guide vane impeller; 11. Volute impeller; 12. First pump cover; 13. Second pump cover; 14. First pump casing; 15. Second pump casing; 16. First water flow channel; 17. Second water flow channel; 18. Connecting column; 19. Support block; 20. Through hole; 21. Connecting pipe; 22. Third pump cover; 23. Third water flow channel; 24. Inlet end; 25. Outlet end. Detailed Implementation

[0022] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0023] As shown in Figures 1-3, this linear water pump using a dual-output shaft motor 2 includes a centrifugal pump body 1 and a motor 2. The centrifugal pump body is provided with a sealed cavity 3 for accommodating the motor 2. The motor 2 is provided with a first output shaft 4 and a second output shaft 5, which are in opposite directions. The centrifugal pump body 1 is provided with an inlet 6, an outlet 7, a first impeller assembly 8, and a second impeller assembly 9. The inlet 6 and the outlet 7 are respectively located at both ends of the centrifugal pump body 1. The first impeller assembly 8 is located on the first output shaft 4, and the second impeller assembly 9 is located on the second output shaft 5. The first impeller assembly 8 is used to guide the liquid at the inlet 6 to the second impeller assembly 9, and the second impeller assembly 9 is used to guide the liquid from the first impeller assembly 8 to the outlet 7.

[0024] To elaborate further, both the first impeller group 8 and the second impeller group 9 are equipped with at least one impeller, and the number of impellers in the first impeller group 8 and the second impeller group 9 is the same. This is to ensure that the axial forces at both ends can cancel each other out. At the same time, setting multiple impellers can improve the head capacity and efficiency.

[0025] To elaborate further, when both the first impeller group 8 and the second impeller group 9 are equipped with one impeller, the impeller of the first impeller group 8 is a guide vane impeller 10, and the second impeller group 9 is a volute impeller 11. When both the first impeller group 8 and the second impeller group 9 are equipped with at least two impellers, the multiple impellers of the first impeller group 8 are all guide vane impellers 10, and the second impeller group 9 includes one volute impeller 11 and at least one guide vane impeller 10. The volute impeller 11 is located at one end near the sealing cavity 3. The impeller closest to the outlet 7 is modified to a turbine impeller, which increases the pump head and makes this application applicable to medium and high head, medium and small flow conditions, such as industrial, agricultural, and municipal construction fields.

[0026] To elaborate further, the cross-sectional shape of the volute impeller 11 is a helical involute, as detailed in the instruction manual appendix. Figure 3 Since most existing multistage pumps use guide vane impellers, their efficiency is not high. Therefore, we modified the last impeller to a volute impeller 11 and set the cross-section to a helical involute to improve the efficiency of liquid collection.

[0027] To elaborate further, the centrifugal pump body 1 includes a first pump casing 14, a first pump cover 12, and a second pump cover 13. The first pump casing 14 includes an inlet end 24 and an outlet end 25. The first pump cover 12 is used to seal the inlet end 24, and the second pump cover 13 is used to seal the outlet end 25. The inlet 6 is located on the first pump cover 12, and the outlet end 25 is located on the second pump cover 13. The inlet end 24 is used for the installation of the first impeller assembly 8 and the motor 2. The outlet end 25 is provided with a second pump casing 15 and a third pump cover 22. The second pump casing 15 is used for storing the second impeller assembly 9, and the interior of the second pump casing 15 is connected to the inlet end 24.

[0028] To elaborate further, a first water flow channel 16 is provided inside the inlet end 24. The first water flow channel 16 is used to supply liquid from the first impeller assembly 8 into the second pump casing 15. A second water flow channel 17 is provided between the second pump casing 15 and the second impeller assembly 9. The second water flow channel 17 connects to the first water flow channel 16 and is used to supply liquid from the first water flow channel 16 to the second impeller assembly 9. A third water flow channel 23 is provided between the second pump casing 15 and the outlet end 25. The third water flow channel 23 is used to supply liquid from the second impeller assembly 9 to the outlet 7. The liquid enters the first impeller assembly 8 from the inlet 6, is pressurized by the first impeller assembly 8, and then flows from the first water flow channel 16 to the second water flow channel 17. It then enters the second impeller assembly 9 from the end away from the sealing cavity 3 for secondary pressurization. After pressurization, it flows to the outlet 7 through the third water flow channel 23. Leave the centrifugal pump body 1.

[0029] To elaborate further, the first water flow channel 16 is provided with multiple connecting columns 18, which are used to connect the water inlet end 24 and the sealing cavity 3. The second pump casing 15 is provided with a support block 19 for supporting the second impeller assembly 9. The support block 19 is provided with multiple through holes 20, which are used to connect the first water flow channel 16 and the second water flow channel 17. The connecting columns 18 support the first water flow channel 16 between the water inlet end 24 and the sealing cavity 3, and at the same time fix the sealing cavity 3. They also allow the liquid to pass through the surface of the sealing cavity 3 for heat exchange with the sealing cavity 3, thereby reducing the temperature of the sealing cavity 3, thereby reducing the temperature of the motor 2 and increasing the service life of the motor 2.

[0030] To elaborate further, the support block 19 is also provided with a connecting pipe 21, which is used to connect the second impeller group 9 and the third water flow channel 23. The connecting pipe 21 is located on the side close to the sealing cavity 3. Since the first impeller group 8 and the second impeller group 9 are arranged oppositely, the output port of the second impeller group 9 is located near the sealing cavity 3. Therefore, it is necessary to provide a connecting pipe 21 so that it does not affect the second water flow channel 17.

[0031] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0032] Although this document uses a large number of technical terms, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this invention; interpreting them as any additional limitation would contradict the spirit of this invention.

Claims

1. A linear water pump employing a dual-output shaft motor, characterized in that, The system includes a centrifugal pump body (1) and a motor (2). The centrifugal pump body (1) is provided with a sealed cavity (3) for accommodating the motor (2). The motor (2) is provided with a first output shaft (4) and a second output shaft (5). The first output shaft (4) and the second output shaft (5) are in opposite directions. The centrifugal pump body (1) is provided with an inlet (6), an outlet (7), a first impeller assembly (8), and a second impeller assembly (9). The inlet (6) and the outlet (7) are respectively located at both ends of the centrifugal pump body (1). The first impeller assembly (8) is located on the first output shaft (4), and the second impeller assembly (9) is located on the second output shaft (5). The first impeller assembly (8) is used to guide the liquid at the inlet (6) to the second impeller assembly (9), and the second impeller assembly (9) is used to guide the liquid from the first impeller assembly (8) to the outlet (7). The centrifugal pump body (1) includes a first pump casing (14), a first pump cover (12), and a second pump cover (13). The first pump casing (14) includes an inlet end (24) and an outlet end (25). The first pump cover (12) The second pump cover (13) is used to seal the water inlet (24), the second pump cover (13) is used to seal the water outlet (25), the water inlet (6) is provided on the first pump cover (12), the water outlet (25) is provided on the second pump cover (13), the water inlet (24) is used for the installation of the first impeller assembly (8) and the motor (2), the water outlet (25) is provided with a second pump housing (15) and a third pump cover (22), the second pump housing (15) is used for the storage of the second impeller assembly (9), and the interior of the second pump housing (15) is connected to the water inlet (24). The inlet end (24) is provided with a first water flow channel (16), which is used to allow liquid to enter the second pump casing (15) from the first impeller assembly (8). A second water flow channel (17) is provided between the second impeller assembly (9) and the second impeller assembly (9). The second water flow channel (17) is connected to the first water flow channel (16). The second water flow channel (17) is used to supply liquid from the first water flow channel (16) to the second impeller assembly (9). A third water flow channel (23) is provided between the second pump casing (15) and the outlet end (25). The third water flow channel (23) is used to supply liquid from the second impeller assembly (9) to the outlet (7).

2. A linear water pump employing a dual-output shaft motor according to claim 1, characterized in that, The first impeller group (8) and the second impeller group (9) are each provided with at least one impeller.

3. A linear water pump employing a dual-output shaft motor according to claim 2, characterized in that, When both the first impeller group (8) and the second impeller group (9) are provided with one impeller, the impeller of the first impeller group (8) is a guide vane impeller (10), and the second impeller group (9) is a volute impeller (11). When both the first impeller group (8) and the second impeller group (9) are provided with at least two impellers, the multiple impellers of the first impeller group (8) are all guide vane impellers (10), and the second impeller group (9) includes one volute impeller (11) and at least one guide vane impeller (10).

4. A linear water pump employing a dual-output shaft motor according to claim 3, characterized in that, The volute impeller (11) is located at one end near the sealing cavity (3).

5. A linear water pump employing a dual-output shaft motor according to claim 3, characterized in that, The cross-sectional shape of the volute impeller (11) is a spiral involute.

6. A linear water pump employing a dual-output shaft motor according to claim 1, characterized in that, The first water flow channel (16) is provided with a plurality of connecting posts (18), the connecting posts (18) For connecting the water inlet end (24) and the sealing cavity (3), the second pump housing (15) is provided with a support block (19) for supporting the second impeller assembly (9), and the support block (19) is provided with a plurality of through holes (20), which are used to connect the first water flow channel (16) and the second water flow channel (17).

7. A linear water pump employing a dual-output shaft motor according to claim 6, characterized in that, The support block (19) is also provided with a connecting pipe (21), which is used to connect the second impeller group (9) and the third water channel (23). The connecting pipe (21) is located on the side close to the sealing cavity (3).

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