A compact split-case pump

Abstract

This utility model discloses a compact split-case pump, relating to the field of water pumps. It includes a pump body and a pump cover mounted on the pump body, forming an open cavity. Bearing bodies are provided on both the front and rear sides of the connection between the pump body and the pump cover, and are fixedly connected to the pump body and pump cover. Bearings for supporting the pump shaft are installed within the bearing bodies. A rear bearing outer pressure cover is installed on the bearing body located at the rear of the pump body, and a front bearing outer pressure cover is installed on the bearing body located at the front of the pump body. The front end of the pump shaft passes through the front bearing outer pressure cover and is connected to an external power source. An impeller driven by the pump shaft is installed within the open cavity. Mechanical seals are installed on both the front and rear sides of the pump shaft, with the mechanical seals located within the open cavity. This utility model reduces the axial dimension of the water pump, making the pump structure compact and simplified, convenient for installation and maintenance, and improving operational stability.

Description

Technical Field

[0001] This utility model relates to the field of water pumps, specifically to a compact split-case pump. Background Technology

[0002] Split-case pumps (especially single-stage double-suction split-case pumps) are characterized by high efficiency, simple structure, and easy maintenance. They are commonly used in building HVAC, raw water intake, municipal water supply, power plant circulating water, heating network circulating water, marine industrial water, and other industrial water markets. The market demand for them is large, and the demand for compact pump models is increasing.

[0003] The rotor support structure of the split-case pump is a bearing component. In the conventional structure, the rotor support structure (bearing body component) and the shaft seal structure are set separately. The bearing body component is installed on the pump body through the bearing bracket, which results in a large distance between the bearing body and the sealing structure. The overall axial dimension of the water pump is large, which requires strict processing technology, has a complex assembly process, a high defect rate, and low pump operation stability. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a compact split-case pump that reduces the axial dimension of the pump, making the pump structure compact and simplified, easy to install and maintain, and improving operational stability.

[0005] The purpose of this utility model is achieved through the following technical solution: This compact split-case pump includes a pump body and a pump cover mounted on the pump body, forming an open cavity between the two. Bearing bodies are provided on both the front and rear sides of the connection between the pump body and the pump cover, and the bearing bodies are fixedly connected to the pump body and the pump cover. Bearings for supporting the pump shaft are installed in the bearing bodies. A rear bearing outer pressure cover is installed on the bearing body located on the rear side of the pump body, and a front bearing outer pressure cover is installed on the bearing body located on the front side of the pump body. The front end of the pump shaft passes through the front bearing outer pressure cover and is connected to an external power source. An impeller driven by the pump shaft is installed in the open cavity. Mechanical seals are installed on the pump shaft on both the front and rear sides of the impeller, so that the mechanical seals are located in the open cavity.

[0006] As a further technical solution, the impeller and the pump shaft are connected by a key, one end of the impeller is positioned on the step of the pump shaft, and the other end of the impeller is axially positioned with the pump shaft by a shaft elastic retaining ring.

[0007] As a further technical solution, the inner side of the mechanical seal is positioned on the step of the pump shaft by a mechanical seal gasket, and the outer side of the mechanical seal is press-fitted to the connection between the pump body and the pump cover by a mechanical seal gland.

[0008] As a further technical solution, a pump body sealing ring is installed on the pump body by means of a flexible cylindrical pin. The pump body sealing ring is cylindrical and is fitted on both sides of the impeller.

[0009] As a further technical solution, a step is provided on the pump shaft near the bearing housing to position and install a V-shaped water baffle ring, which contacts and seals with the bearing housing.

[0010] As a further technical solution, an exhaust valve is installed on the top of the pump cover.

[0011] As a further technical solution, the bearings used are ball bearings or roller bearings.

[0012] The beneficial effects of this utility model are as follows: 1. The bearing body is no longer mounted on the pump body via the bearing bracket, eliminating the bearing bracket structure. The bearing body and mechanical seal structure are more compact, reducing the axial dimension of the water pump, making the pump structure compact, simplified, easy to install and maintain, and improving operational stability. 2. The V-shaped water-blocking ring can achieve the dual functions of water blocking and bearing sealing; 3. The mechanical seal is located in an open cavity, eliminating the need for separate flushing and cooling pipelines, thus saving space and manufacturing costs; 4. The mechanical seal gland is used instead of the mechanical seal body structure, which is simple in structure and easy to install and maintain. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model.

[0014] Figure 2 This is a cross-sectional structural diagram of the present invention.

[0015] Explanation of reference numerals in the attached drawings: 1. Pump body; 2. Pump cover; 3. Pump body sealing ring; 4. Pump shaft; 5. Impeller; 6. Mechanical seal gasket; 7. Mechanical seal gland; 8. Bearing body; 9. Front bearing outer gland; 10. Rear bearing outer gland; 11. Bearing; 12. V-shaped water retaining ring; 13. Elastic cylindrical pin; 14. Key; 15. Shaft elastic retaining ring; 16. Mechanical seal; 17. Exhaust valve. Detailed Implementation

[0016] The present invention will now be described in detail with reference to the accompanying drawings: Example: As attached Figure 1 , 2 As shown, this compact split-case pump includes a pump body 1, a pump cover 2, a pump body sealing ring 3, a pump shaft 4, an impeller 5, a mechanical seal gasket 6, a mechanical seal gland 7, a bearing housing 8, a front bearing outer gland 9, a rear bearing outer gland 10, a bearing 11, a V-shaped water baffle 12, a flexible cylindrical pin 13, a key 14, a shaft elastic retaining ring 15, a mechanical seal 16, and an exhaust valve 17.

[0017] Reference Appendix Figure 2A pump cover 2 is installed on the pump body 1, forming an open cavity between the pump body 1 and the pump cover 2. Bearing bodies 8 are provided on both the front and rear sides of the connection between the pump body 1 and the pump cover 2, and the bearing bodies 8 are fixedly connected to the pump body 1 and the pump cover 2. A bearing 11 (preferably a ball bearing or roller bearing) is installed in each bearing body 8. A rear bearing outer pressure cover 10 is installed on the bearing body 8 located on the rear side of the pump body 1, pressing the bearing 11 tightly onto the bearing body 8. A front bearing outer pressure cover 9 is installed on the bearing body 8 located on the front side of the pump body 1. Both ends of the pump shaft 4 are supported on the corresponding bearings 11, and the front end of the pump shaft 4 extends through the front bearing outer pressure cover 9 and is connected to an external power source (motor). An impeller 5 is installed in the open cavity between the pump body 1 and the pump cover 2. The impeller 5 is connected to the pump shaft 4 via a key 14 for transmission. One end of the impeller 5 is positioned on the step of the pump shaft 4, and the other end of the impeller 5 is axially positioned with the pump shaft 4 via a shaft elastic retaining ring 15.

[0018] Furthermore, mechanical seals 16 are installed on both the front and rear sides of the pump shaft 4 of the impeller 5, so that the mechanical seals 16 are located in an open cavity, eliminating the need for separate flushing and cooling pipelines, thus saving space and manufacturing costs. Preferably, the inner side of the mechanical seal 16 is positioned on the step of the pump shaft 4 by a mechanical seal gasket 6, and the outer side of the mechanical seal 16 is press-fitted to the connection between the pump body 1 and the pump cover 2 by a mechanical seal gland 7.

[0019] Preferably, a pump body sealing ring 3 is positioned and installed on the pump body 1 by an elastic cylindrical pin 13. The pump body sealing ring 3 is cylindrical and is sleeved on both sides of the impeller 5. A step is provided on the pump shaft 4 near the bearing body 8. A V-shaped water baffle ring 12 is positioned and installed on this step. The V-shaped water baffle ring 12 contacts and seals with the bearing body 8, which can achieve the dual functions of water baffle and bearing sealing.

[0020] like Figure 1 As shown, an exhaust valve 17 is provided on the top of the pump cover 2.

[0021] The working process of this utility model: Pump shaft 4 is driven by an external power source (motor). When pump shaft 4 rotates, it drives impeller 5 via key 14 to pump liquid. Pump body sealing ring 3 seals impeller 5 relative to pump body 1. Simultaneously, mechanical seal 16 and mechanical seal cover 7 seal the connection between pump body 1 and pump cover 2. Since mechanical seal 16 is located in an open cavity, there is no need for separate flushing and cooling pipelines, saving space and manufacturing costs. Furthermore, V-shaped water baffle 12 is positioned by a small step on pump shaft 4, achieving both water baffle and bearing seal functions. V-shaped water baffle 12 is located between bearing body 8 and mechanical seal cover 7. Bearing body 8 is no longer mounted on pump body 1 via bearing bracket, eliminating the bearing bracket structure. The structure between mechanical seal 16 and bearing body 8 is compact, with a small axial dimension, ensuring pump operational stability.

[0022] It is understood that, for those skilled in the art, any equivalent substitutions or modifications to the technical solutions and inventive concepts of this utility model should fall within the protection scope of the appended claims.

Claims

1. A compact split-case pump, characterized in that: The pump body (1) and the pump cover (2) installed on the pump body (1) form an open cavity. The front and rear sides of the connection between the pump body (1) and the pump cover (2) are provided with bearing bodies (8), and the bearing bodies (8) are connected and fixed to the pump body (1) and the pump cover (2). The bearing body (8) is equipped with a bearing (11) for supporting the pump shaft (4). The bearing body (8) located on the rear side of the pump body (1) is equipped with a rear bearing outer pressure cover (10), and the bearing body (8) located on the front side of the pump body (1) is equipped with a front bearing outer pressure cover (9). The front end of the pump shaft (4) passes through the front bearing outer pressure cover (9) and is connected to an external power source. The impeller (5) driven by the pump shaft (4) is installed in the open cavity. Mechanical seals (16) are installed on the pump shaft (4) on both the front and rear sides of the impeller (5), so that the mechanical seals (16) are located in the open cavity.

2. The compact mid-mount pump of claim 1, wherein: The impeller (5) is connected to the pump shaft (4) by a key (14). One end of the impeller (5) is positioned on the step of the pump shaft (4), and the other end of the impeller (5) is axially positioned with the pump shaft (4) by a shaft elastic retaining ring (15).

3. The compact center-opening pump of claim 1, wherein: The inner side of the mechanical seal (16) is positioned on the step of the pump shaft (4) by the mechanical seal gasket (6), and the outer side of the mechanical seal (16) is press-fitted to the connection between the pump body (1) and the pump cover (2) by the mechanical seal cover (7).

4. The compact mid-mount pump of claim 1, wherein: The pump body (1) is equipped with a pump body sealing ring (3) by means of an elastic cylindrical pin (13). The pump body sealing ring (3) is cylindrical and is fitted on both sides of the impeller (5).

5. The compact center-opening pump of claim 1, wherein: A step is provided on the pump shaft (4) near the bearing body (8) for positioning and installing a V-shaped water baffle (12), which is sealed to the bearing body (8).

6. The compact mid-mount pump of claim 1, wherein: An exhaust valve (17) is provided on the top of the pump cover (2).

7. The compact center-opening pump of claim 1, wherein: The bearing (11) is a ball bearing or a roller bearing.

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