Axially split single-stage single-suction centrifugal pump

Abstract

The utility model relates to an axial subdivision single-stage single-suction centrifugal pump which comprises a base, a pump body, an impeller, a mechanical seal, a pump cover, a water retaining ring, a shaft, a bearing component, a coupler component and a motor. The pump body is of an axial subdivision structure and is divided into an upper pump body and a lower pump body, and a certain angle is formed between the axial subdivision face and the horizontal plane. The pump body is fixed on the base; a pump suction inlet is located on the side face and located on the same horizontal line with the center line of the shaft, and a discharge outlet is located on the upper side and perpendicular to the axial subdivision face. The shaft is arranged in the bearing part; the impeller, the mechanical seal and the water retaining ring are arranged on the shaft; one side of the pump cover is connected with the bearing part, and the other side is connected with the pump body. The pump body is designed into the structure of the upper pump body and the lower pump body, when the pump needs to be overhauled, the whole rotor can be moved out only by opening the upper pump cover without moving the motor, the overhauling is convenient, and the overhauling space is small. A support is arranged at the bottom of the bearing part and fixed to the base, and stability is good. The impeller is fixed, so that the impeller is prevented from axially moving. And the water retaining ring prevents leaked media from entering the bearing part to cause bearing failure.

Description

Technical Field

[0001] The utility model relates to a centrifugal pump, in particular to an axially split single-stage single-suction centrifugal pump which is convenient for maintenance and has a stable structure. Background Art

[0002] Single-stage single-suction centrifugal pumps are widely used in the construction industry (high-rise water supply, pressurization, building fire protection, fire fighting), industry (circulating water supply in process systems, cooling water circulation, boiler water supply, industrial water supply and drainage), water supply (water plant water supply, distribution and pressurization, swimming pool water supply, fountain water supply, farmland irrigation, artificial sprinkler irrigation, etc.) and environmental engineering (filtration devices, water treatment systems, dust removal devices, recooling systems, sewage sewer devices and water filtration treatment).

[0003] The existing single-stage single-suction centrifugal pumps have an integral pump body. During maintenance, the rotor components cannot be removed without removing the motor, which makes the pump very inconvenient to maintain. The maintenance requires a large space and is time-consuming and labor-intensive. Utility Model Content

[0004] In view of the above problems, the main purpose of the utility model is to provide an axially split single-stage single-suction centrifugal pump which is easy to maintain and has a stable structure.

[0005] The utility model solves the above technical problems through the following scheme: an axially split single-stage single-suction centrifugal pump, the axially split single-stage single-suction centrifugal pump comprises: a base, a pump body, an impeller, a mechanical seal, a pump cover, a water retaining ring, a shaft, a bearing component, a coupling component, and a motor; the pump body is an axially split structure, divided into an upper pump body and a lower pump body, and the axial split surface and the horizontal plane have a certain angle; the pump body is fixed on the base; the pump suction port is located on the side and is on the same horizontal line as the center line of the shaft, and the discharge port is located on the upper side and is perpendicular to the axial split surface; the shaft is installed in the bearing component, and the impeller, the mechanical seal, and the water retaining ring are installed on the shaft; one side of the pump cover is connected to the bearing component, and the other side is connected to the pump body; the mechanical seal is located between the pump cover and the impeller, and the impeller is fixed on the shaft; the motor shaft extension and the pump shaft are connected through the coupling component.

[0006] In a specific implementation example of the utility model, a sealing groove is designed on the lower pump body, an O-ring is installed in the sealing groove, the upper pump body and the lower pump body are connected by bolts to form a complete pump body, and the pump body is fixed to the base by bolts.

[0007] In a specific implementation example of the utility model, one side of the pump cover is connected to the bearing component by bolts, and the other side is connected to the pump body by bolts.

[0008] In a specific implementation example of the present utility model, a bracket is designed at the bottom of the bearing component and is fixed to the base by bolts.

[0009] In a specific implementation example of the utility model, the impeller is fixed on the shaft by means of a baffle and screws to prevent the impeller from axial movement, and the screw thread rotation direction of the screw fixing the impeller is opposite to the rotation direction of the motor.

[0010] In a specific implementation example of the utility model, the water retaining ring is sleeved on the shaft and is located between the mechanical seal and the bearing component.

[0011] The positive progressive effect of the utility model is that compared with the common similar technologies, the axially split single-stage single-suction centrifugal pump provided by the utility model has a pump body specially designed as an upper pump body and a lower pump body structure, an O-ring is installed between the upper and lower pump bodies, and they are connected by bolts to form a complete pump body. Its design can ensure that when the pump needs to be repaired, the entire rotor can be removed by opening the upper pump cover without moving the motor, which is convenient for maintenance and requires a small maintenance space.

[0012] The bottom of the bearing component of the utility model is designed with a bracket, which is fixed on the base, and has better stability than similar products. The fixing method adopted by the impeller of the utility model prevents the impeller from moving axially. The utility model also provides a water retaining ring to prevent the leaked medium from entering the bearing component and causing the bearing to fail. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a cross-sectional view of the overall structural schematic diagram of the utility model.

[0014] Figure 2 It is a schematic diagram of the structure of the pump body in the utility model.

[0015] The following are the names corresponding to the label numbers in this utility model:

[0016] Base 1, pump body 2, impeller 3, mechanical seal 4, pump cover 5, water retaining ring 6, shaft 7, bearing component 8, coupling component 9, motor 10, upper pump body 201, lower pump body 202, O-ring 203. DETAILED DESCRIPTION

[0017] The preferred embodiments of the present invention are given below in conjunction with the accompanying drawings to illustrate the technical solution of the present invention in detail.

[0018] Figure 1 It is a cross-sectional view of the overall structural schematic diagram of the utility model, Figure 2 It is a schematic diagram of the structure of the pump body in the utility model, such as Figure 1-2As shown: the utility model provides an axially split single-stage single-suction centrifugal pump comprising: a base 1, a pump body 2, an impeller 3, a mechanical seal 4, a pump cover 5, a water retaining ring 6, a shaft 7, a bearing component 8, a coupling component 9, and a motor 10; the pump body 2 is an axially split structure, divided into an upper pump body 201 and a lower pump body 202, and the axial split surface is at a certain angle to the horizontal plane; a sealing groove is designed on the lower pump body 202, and an O-ring 203 is installed in the sealing groove, the upper pump body 201 and the lower pump body 202 are connected by bolts to form a complete pump body 2, and the pump body 2 is fixed to the base 1 by bolts; the pump suction inlet is located on the side and perpendicular to the axis, and the discharge outlet is located on the upper side and perpendicular to the axial split surface.

[0019] The shaft 7 is installed in the bearing component 8, and the impeller 3, mechanical seal 4 and water retaining ring 6 are installed on the shaft 7; one side of the pump cover 5 is connected to the bearing component 8 by bolts, and the other side is connected to the pump body 2 by bolts; a bracket is designed at the bottom of the bearing component 8 and fixed to the base 1 by bolts; the mechanical seal 4 is located between the pump cover 5 and the impeller 3, and the impeller 3 is fixed to the shaft 7 by a baffle and screws to prevent the impeller 3 from axial movement. The thread rotation direction of the screw fixing the impeller 3 is opposite to the rotation direction of the motor 10 (viewed from the motor shaft extension end) to ensure that it will not loosen during operation. A key is designed between the shaft 7 and the impeller 3 so that the shaft drives the impeller 3 to rotate; the motor 10 shaft extension and the pump shaft 7 are connected by a coupling component 9, and the motor 10 can rotate in a clockwise direction or counterclockwise direction according to customer needs.

[0020] The utility model water retaining ring is sleeved on the shaft and is located between the mechanical seal and the bearing component. The water retaining ring prevents the leaked medium from entering the bearing component and causing the failure of the bearing.

[0021] The pump body of the utility model is designed as an axially split structure, which is divided into an upper pump body and a lower pump body, and there is a certain angle between the axial split surface and the horizontal plane; a sealing groove is designed on the lower pump body of the utility model, and an O-ring is installed in the sealing groove; the upper pump body and the lower pump body are connected by bolts to form a complete pump body.

[0022] The existing single-stage single-suction centrifugal pumps have an integral pump body. During maintenance, the rotor components cannot be removed without removing the motor, which makes the pump very inconvenient to maintain. The maintenance requires a large space and is time-consuming and labor-intensive.

[0023] The utility model specially designs the pump body into an upper pump body and a lower pump body structure, an O-ring is installed between the upper and lower pump bodies, and the pump bodies are connected by bolts to form a complete pump body. The design can ensure that when the pump needs to be repaired, the entire rotor can be removed by opening the upper pump cover without moving the motor, which is convenient for maintenance and requires a small maintenance space.

[0024] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected, and the scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. An axially split single-stage single-suction centrifugal pump, characterized in that: The axially split single-stage single-suction centrifugal pump comprises: a base, a pump body, an impeller, a mechanical seal, a pump cover, a water retaining ring, a shaft, a bearing component, a coupling component, and a motor; the pump body is an axially split structure, divided into an upper pump body and a lower pump body, and the axial split surface is at a certain angle to the horizontal plane; the pump body is fixed on the base; the pump suction port is located on the side and is on the same horizontal line as the center line of the shaft, and the discharge port is located on the upper side and is perpendicular to the axial split surface; the shaft is installed in the bearing component, and the impeller, mechanical seal, and water retaining ring are installed on the shaft; one side of the pump cover is connected to the bearing component, and the other side is connected to the pump body; the mechanical seal is located between the pump cover and the impeller, and the impeller is fixed on the shaft; the motor shaft extension and the pump shaft are connected through a coupling component.

2. The axially split single-stage single-suction centrifugal pump according to claim 1, characterized in that: A sealing groove is designed on the lower pump body, and an O-ring is installed in the sealing groove. The upper pump body and the lower pump body are connected by bolts to form a complete pump body, and the pump body is fixed to the base by bolts.

3. The axially split single-stage single-suction centrifugal pump according to claim 1, characterized in that: One side of the pump cover is connected to the bearing component by bolts, and the other side is connected to the pump body by bolts.

4. The axially split single-stage single-suction centrifugal pump according to claim 1, characterized in that: A bracket is designed at the bottom of the bearing component and is fixed to the base by bolts.

5. The axially split single-stage single-suction centrifugal pump according to claim 1, characterized in that: The impeller is fixed to the shaft by means of a baffle and screws to prevent the impeller from axial movement. The screw thread direction of the fixed impeller is opposite to the rotation direction of the motor.

6. The axially split single-stage single-suction centrifugal pump according to claim 1, characterized in that: The water retaining ring is mounted on the shaft and is located between the mechanical seal and the bearing component.

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