Volute type water pump adopting double-output-shaft motor

Abstract

The utility model provides a volute type water pump adopting a double-output-shaft motor, and belongs to the technical field of water pump instruments. The problem that the axial force load of an existing motor shaft is large is solved. The volute type water pump adopting the double-output-shaft motor comprises a centrifugal pump body and the 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, and the first output shaft and the second output shaft are opposite in direction. The centrifugal pump body is provided with a water inlet, a water outlet, a first impeller set and a second impeller set, 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] The utility model belongs to water pump instrument technical field, especially relate to a volute water pump of adopting double output shaft motor. BACKGROUND

[0002] Centrifugal pump transports liquid by centrifugal force generated by impeller rotation, and is suitable for various fluid transportation requirements. Single-stage centrifugal pump has simple structure and is suitable for low-lift occasions. Multi-stage centrifugal pump can realize high lift and large flow by connecting multiple impellers in series, while maintaining high efficiency and wide operating range. The multi-stage design of the centrifugal pump is compact and has strong adaptability, and is widely used in high-rise water supply, industrial processes and fire fighting systems.

[0003] Axial force is an important research topic in the field of centrifugal pumps. Unbalanced axial force can cause severe consequences such as bearing wear, which can affect the normal operation of the pump. During operation, the rotor is subjected to axial force, which will pull the rotor to move axially. Therefore, the axial force must be eliminated or balanced to ensure normal operation of the pump. SUMMARY

[0004] The utility model discloses a volute water pump of adopting double output shaft motor to solve the above problems in the prior art.

[0005] The utility model discloses a volute water pump of adopting double output shaft motor, including centrifugal pump body and motor, the sealed cavity that is used for motor containing is provided in the centrifugal pump body, the motor is provided with first output shaft and second output shaft, first output shaft and second output shaft direction is opposite, the centrifugal pump body is provided with water inlet, water outlet, first impeller group and second impeller group, first impeller group sets up on first output shaft, second impeller group sets up on second output shaft, first impeller group is used for guiding the liquid at water inlet to second impeller group, second impeller group is used for guiding liquid from first impeller group to water outlet.

[0006] The utility model discloses a volute water pump of adopting double output shaft motor, including centrifugal pump body and motor, the sealed cavity that is used for motor containing is provided in the centrifugal pump body, the motor is provided with first output shaft and second output shaft, first output shaft and second output shaft direction is opposite, the centrifugal pump body is provided with water inlet, water outlet, first impeller group and second impeller group, first impeller group sets up on first output shaft, second impeller group sets up on second output shaft, first impeller group is used for guiding the liquid at water inlet to second impeller group, second impeller group is used for guiding liquid from first impeller group to water outlet.

[0007] In the volute water pump of adopting double output shaft motor, the first impeller group and the second impeller group each have at least one impeller.

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

[0009] In the aforementioned volute water pump employing a dual-output-shaft motor, the volute impeller is located at one end near the sealing cavity, and the cross-sectional shape of the volute impeller is a helical involute.

[0010] In the above-mentioned volute water pump with dual output shaft motor, the centrifugal pump body includes a first pump cover, a second pump cover, a first pump housing, and a second pump housing. The first pump cover is used to seal the first pump housing, the second pump cover is used to seal the second pump housing, the first pump housing is used for mounting the motor and the first impeller assembly, and the second pump housing is used for mounting the second impeller assembly.

[0011] In the aforementioned volute water pump employing a dual-output shaft motor, the inlet is located on the first pump cover, the outlet is located on the side wall of the second pump casing, and the outlet is located near the end of the first pump casing.

[0012] In the aforementioned volute water pump employing a dual-output shaft motor, a first water flow channel is formed between the sealing cavity and the first pump casing. Multiple connecting posts are installed within this first water flow channel. The second blade...

[0013] The impeller assembly, together with the second pump casing and the second pump cover, forms a second water flow channel. The first water flow channel is connected to the second water flow channel. The first water flow channel is used to direct the liquid located in the first impeller assembly to the second water flow channel, and the second water flow channel is used to direct the water to the second impeller assembly.

[0014] In the above-mentioned volute water pump with dual output shaft motor, the second pump casing is provided with a support block for supporting the second impeller assembly. The support column is provided with multiple through holes for connecting the first water flow channel and the second water flow channel.

[0015] In the aforementioned volute water pump employing a dual-output-shaft motor, a connecting pipe is also provided on the support block, which is used to connect the second impeller assembly and the outlet.

[0016] 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

[0017] Figure 1It is the structure schematic view of multistage volute impeller of the utility model.

[0018] Figure 2 It is the structure schematic view of multistate volute impeller of the utility model.

[0019] Figure 3 It is the structure schematic view of multistate volute impeller of the utility model.

[0020] Figure 4 It is the structure schematic view of first pump shell of the utility model.

[0021] Figure 5 It is the structure schematic view of second pump shell of the utility model.

[0022] Figure 6 It is the structure schematic view of multistate volute impeller of the utility model.

[0023] In the figure, 1, centrifugal pump body;2, motor;3, sealing cavity;4, first output shaft;5, second output shaft;6, water inlet;7, water outlet;8, first impeller group;9, second impeller group;11, volute impeller;12, first pump cover;13, second pump cover;14, first pump shell;15, second pump shell;16, first water flow channel;17, second water flow channel;18, connecting column;19, support block;20, through hole;21,

[0024] Connecting pipeline. Specific embodiments

[0025] The following is the specific embodiment of the utility model and the technical scheme of the utility model is described in conjunction with the drawings

[0026] Further description, but the utility model is not limited to these embodiments.

[0027] As Figures 1-6 Indicated, this adopts the volute water pump of double output shaft motor, including centrifugal pump body 1 and motor 2, and the sealing cavity 3 for accommodating motor 2 is provided in centrifugal pump body, and motor 2 is provided with first output shaft 4 and second output shaft 5, and the direction of first output shaft 4 and second output shaft 5 is opposite, and centrifugal pump body 1 is provided with water inlet 6, water outlet 7, first impeller group 8 and second impeller group 9, and first impeller group 8 is arranged on first output shaft 4, and second impeller group 9 is arranged on second output shaft 5, and first impeller group 8 is used to guide the liquid at water inlet 6 to second impeller group 9, and second impeller group 9 is used to guide the liquid from first impeller group 8 to water outlet 7.

[0028] To elaborate further, both the first impeller group 8 and the second impeller group 9 are equipped with at least one impeller. The number of impellers in the first impeller group 8 and the second impeller group 9 is the same, which is used 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 improve efficiency.

[0029] To elaborate further, 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. The volute impeller 11 is located at one end near the sealing cavity 3. The impeller closest to the outlet 7 is modified into a turbine impeller, which increases the pump head. This makes the present application applicable to medium and high head, medium and small flow rate applications, such as industrial, agricultural, and municipal construction fields. The cross-sectional shape of the volute impeller 11 is a spiral involute, as detailed in the appendix to the specification. Figure 6 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.

[0030] To elaborate further, the centrifugal pump body 1 includes a first pump cover 12, a second pump cover 13, a first pump housing 14, and a second pump housing 15. The first pump cover 12 is used to seal the first pump housing 14, and the second pump cover 13 is used to seal the second pump housing 15.

[0031] Pump casing 15, first pump casing 14 is used for mounting the power supply motor 2 and the first impeller assembly 8, and second pump casing 15 is used for mounting the second impeller assembly 9.

[0032] To elaborate further, the inlet 6 is located on the first pump cover 12, and the outlet 7 is located on the side wall of the second pump casing 15. The outlet 7 is located at the end closer to the first pump casing 14. Since the first impeller group 8 and the second impeller group 9 are arranged opposite to each other, the output port of the second impeller group 9 is located at the end closer to the sealing cavity 3.

[0033] To elaborate further, a first water flow channel 16 is formed between the sealing cavity 3 and the first pump casing 14. Multiple connecting posts 18 are installed within the first water flow channel 16. The second impeller assembly 9, together with the second pump casing 15 and the second pump cover 13, forms a second water flow channel 17. The first water flow channel 16 connects to the second water flow channel 17. The first water flow channel 16 directs the liquid from the first impeller assembly 8 to the second water flow channel 17. The second water flow channel 17 directs the water to the second impeller assembly 9. The liquid enters the first impeller assembly 8 from the inlet 6 and, under the action of the first impeller assembly 8, enters the first water flow channel 16, then the second water flow channel 17, and finally enters the second impeller assembly 9 from the second casing cover. Under the action of the second impeller assembly 9, the liquid exits from the outlet 7. Because the first water flow channel 16 passes through the sealing cavity 3 of the motor 2, it carries away the heat from the sealing cavity 3, thus cooling the sealing cavity 3 and preventing the motor 2 from operating at high temperatures for extended periods.

[0034] To elaborate further, the second pump casing 15 is provided with a support block 19 for supporting the second impeller assembly 9. The support column 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 support block 19 provides support for the second impeller assembly 9 without affecting the first water flow channel 16 and the drip water flow channel.

[0035] 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 outlet 7. Since the first impeller group 8 and the second impeller group 9 are arranged in opposite directions, the outlet 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.

[0036] 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.

[0037] 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 volute-type 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) has a sealed cavity (3) for accommodating the motor (2). The motor (2) has a first output shaft (4) and a second output shaft (5), which are in opposite directions. The centrifugal pump body (1) has an inlet (6), an outlet (7), a first impeller assembly (8), and a second impeller assembly (9). The first impeller assembly (8) is mounted on the first output shaft (4), and the second impeller assembly (9) is mounted on the second output shaft (6). The first impeller assembly (8) is used to guide the liquid at the inlet (6) to the second impeller assembly (9). Impeller assembly (9) is used to guide liquid from first impeller assembly (8) to outlet (7); both first impeller assembly (8) and second impeller assembly (9) are provided with at least one impeller; when both first impeller assembly (8) and second impeller assembly (9) are provided with one impeller, the impeller of first impeller assembly (8) is a guide vane impeller (10), and the impeller of second impeller assembly (9) is a volute impeller (11); when both first impeller assembly (8) and second impeller assembly (9) are provided with at least two impellers, the multiple impellers of first impeller assembly (8) are all guide vane impellers (10), and the second impeller assembly (9) includes one volute impeller (11) and at least one guide vane impeller (10).

2. A volute water pump employing a dual-output-shaft motor according to claim 1, characterized in that, The volute impeller (11) is located at one end near the sealing cavity (3), and the cross-sectional shape of the volute impeller (11) is a spiral involute.

3. A volute water pump employing a dual-output-shaft motor according to claim 1, characterized in that, The centrifugal pump body (1) includes a first pump cover (12), a second pump cover (13), a first pump housing (14), and a second pump housing (15). The first pump cover (12) is used to seal the first pump housing (14), and the second pump cover (13) is used to seal the second pump housing (15). The first pump housing (14) is used to install the motor (2) and the first impeller assembly (8), and the second pump housing (15) is used to install the second impeller assembly.

4. A volute water pump employing a dual-output-shaft motor according to claim 3, characterized in that, The inlet (6) is located on the first pump cover (12), and the outlet (7) is located on the side wall of the second pump housing (15), with the outlet (7) located near the end of the first pump housing (14).

5. A volute water pump employing a dual-output-shaft motor according to claim 3, characterized in that, A first water flow channel (16) is formed between the sealing cavity (3) and the first pump casing (14). A plurality of connecting columns (18) are provided in the first water flow channel (16). The second impeller assembly (9), the second pump casing (15), and the second pump cover (13) cooperate to form a second water flow channel (17). The first water flow channel (16) is connected to the second water flow channel (17). The first water flow channel (16) is used to flow the liquid located in the first impeller assembly (8) to the second water flow channel (17). The second water flow channel (17) is used to flow water to the second impeller assembly (9).

6. A volute-type water pump employing a dual-output-shaft motor according to claim 5, characterized in that, The second pump housing (15) is provided with a support block (19) for supporting the second impeller assembly (9). 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 volute 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 assembly (9) and the outlet (7).

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