Compact centrifugal pump rotor with supported seal arrangement
The compact shaft seal structure design solves the problem of excessive axial span in the centrifugal pump rotor support structure, improves the rigidity of the pump shaft and the life of the rotor assembly, reduces vibration and maintenance costs, and achieves more efficient operation and lower production costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- WILO CHINA
- Filing Date
- 2021-12-09
- Publication Date
- 2026-06-09
AI Technical Summary
The existing compact centrifugal pump rotor with supported shaft seal structure has a large axial span, which leads to problems such as poor pump shaft rigidity, short rotor assembly life, high vibration performance and high maintenance costs.
It adopts a compact shaft seal structure design, which includes a combination of components such as pump housing, sealing body, mechanical seal gland, bearing body, bearing, and lock nut. It achieves end face sealing through bolt connection and rubber sealing ring, shortens the axial span, enhances bearing support and positioning, and uses water-throwing ring and mechanical seal to prevent media leakage, thereby improving vibration performance and operating performance.
It effectively shortens the axial span, improves the rigidity of the pump shaft and the life of the rotor assembly, reduces vibration performance and maintenance costs, reduces production costs, and simplifies the maintenance process.
Smart Images
Figure CN116255360B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of fluid machinery and engineering equipment technology, specifically to a compact centrifugal pump rotor with a supported shaft seal structure. Background Technology
[0002] Water pumps, as general industrial products, are widely used in various sectors of society. Centrifugal pumps, as the most commonly used water pump products, are characterized by a wide range of flow and head parameters and relatively stable operating performance, and are widely used in building construction, HVAC, municipal water conservancy, steel metallurgy, water plants, power plants, and other fields. As a crucial core component of centrifugal pumps, the structure of the rotor assembly's support and shaft seal directly affects the shaft sealing performance and operational performance of the pump shaft, and thus has a vital impact on the lifespan and overall operating performance of the entire pump shaft rotor assembly. Therefore, the rotor support and shaft end sealing structure and form are key factors in ensuring the long-term, efficient, and stable operation of the pump shaft rotor assembly.
[0003] The existing technology has the following problems:
[0004] An existing compact centrifugal pump rotor with a supported shaft seal structure suffers from a large axial span, leading to problems such as poor pump shaft rigidity, short rotor assembly lifespan, high vibration and other performance parameters, and high weight and cost of key components like the pump casing. Furthermore, the short rotor assembly lifespan means frequent repairs and replacements are required, resulting in higher maintenance costs. Summary of the Invention
[0005] To address the shortcomings of existing technologies, this invention provides a compact centrifugal pump rotor with a supported shaft seal structure, which solves the problem of large axial span currently existing.
[0006] To achieve the above objectives, the present invention provides the following technical solution: a compact centrifugal pump rotor with a supported shaft seal structure, comprising a pump housing, a sealing body disposed inside the pump housing, an organic seal cover disposed on one side of the sealing body, a first rubber sealing ring disposed between the sealing body and the organic seal cover, a bearing body disposed on one side of the organic seal cover, a bearing disposed inside the bearing body, a bearing retaining ring disposed on one side of the bearing, a locking nut disposed on the other side of the bearing, a locking washer disposed between the bearing and the locking nut, a pump shaft disposed inside the bearing, a water-throwing ring disposed near the organic seal cover on the pump shaft, a mechanical seal disposed between the pump shaft and the organic seal cover, an organic seal positioning retaining ring disposed near the mechanical seal on the pump shaft, and a second rubber sealing ring disposed between the pump housing and the sealing body.
[0007] As a preferred embodiment of the present invention, the sealing body is located between the pump housing and the mechanical seal cover, and the sealing body is connected to the pump housing by bolts.
[0008] As a preferred embodiment of the present invention, the mechanical seal cover is located between the sealing body and the bearing body, and the mechanical seal cover is connected to the sealing body by bolts.
[0009] In a preferred embodiment of the present invention, the bearing body is located on the right side of the mechanical seal cover, and the bearing body is connected to the mechanical seal cover by bolts.
[0010] In a preferred embodiment of the present invention, the locking washer is mounted on the pump shaft and is located between the bearing and the locking nut.
[0011] As a preferred embodiment of the present invention, the water-throwing ring is installed on the pump shaft and is located between the mechanical seal cover and the bearing retaining ring.
[0012] As a preferred embodiment of the present invention, the mechanical seal is installed on the pump shaft and is located between the mechanical seal positioning ring and the mechanical seal gland.
[0013] Compared with the prior art, the present invention provides a compact centrifugal pump rotor with a supported shaft seal structure, which has the following advantages:
[0014] This compact centrifugal pump rotor with a supported shaft seal structure minimizes the axial span length of the centrifugal pump, ensuring the shaft seal function, effectively improving the vibration and operational performance of the pump shaft during operation, extending the lifespan of the pump shaft rotor components, and saving on pump shaft operation and maintenance costs. At the same time, it reduces the production cost of pump shaft parts, and the ingenious rotor support and shaft seal structure design makes subsequent disassembly and maintenance more convenient. Attached Figure Description
[0015] Figure 1 A schematic diagram of the rotor support and shaft seal structure of a compact centrifugal pump;
[0016] Figure 2 This is a schematic diagram of the mechanical seal gland structure;
[0017] Figure 3 This is a schematic diagram of the bearing housing structure.
[0018] In the diagram: 1. Pump casing; 2. Sealing body; 3. Mechanical seal gland; 4. First rubber seal ring; 5. Bearing body; 6. Bearing; 7. Bearing retaining ring; 8. Locking nut; 9. Locking washer; 10. Pump shaft; 11. Water-throwing ring; 12. Mechanical seal; 13. Mechanical seal positioning ring; 14. Second rubber seal ring. Detailed Implementation
[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0020] Please see Figures 1-3 In this embodiment: a compact centrifugal pump rotor with a supported shaft seal structure includes a pump housing 1, a sealing body 2 disposed inside the pump housing 1, an organic seal cover 3 disposed on one side of the sealing body 2, a first rubber sealing ring 4 disposed between the sealing body 2 and the organic seal cover 3, a bearing body 5 disposed on one side of the organic seal cover 3, a bearing 6 disposed inside the bearing body 5, the bearing 6 being mounted on the pump shaft 10 and serving as support and transmission, a bearing retainer ring 7 disposed on one side of the bearing 6, which serves to position the bearing 6. On the other side, a locking nut 8 is provided, and a locking washer 9 is provided between the bearing 6 and the locking nut 8. A pump shaft 10 is provided inside the bearing 6. The pump shaft 10 is the transmission bearing component of the pump set, providing tensile and torsional resistance during the operation of the pump set rotor component. A water-throwing ring 11 is provided near the mechanical seal cover 3 on the pump shaft 10. A mechanical seal 12 is provided between the pump shaft 10 and the mechanical seal cover 3. A mechanical seal positioning ring 13 is provided near the mechanical seal 12 on the pump shaft 10. A second rubber sealing ring 14 is provided between the pump casing 1 and the sealing body 2.
[0021] In this embodiment, the sealing body 2 is located between the pump housing 1 and the mechanical seal cover 3. The sealing body 2 is connected to the pump housing 1 by bolts. The sealing body 2 is installed on the right side of the pump housing 1 and connected to the pump housing 1 by four bolts. The pump housing 1 and the sealing body 2 are sealed at the end face by a second rubber sealing ring 14 to prevent leakage of the conveyed medium along the end face. The mechanical seal cover 3 is located between the sealing body 2 and the bearing body 5. The mechanical seal cover 3 is connected to the sealing body 2 by bolts. The mechanical seal cover 3 is installed between the sealing body 2 and the bearing body 5 and connected to the sealing body 2 by two bolts. The mechanical seal gland 3 is sealed at the end face by a first rubber sealing ring 4 to prevent leakage of the transmitted medium along the end face. Another major function of the mechanical seal gland 3 is to connect the bearing body 5 with four bolts, providing connection strength and axial positioning, thereby shortening the axial span of the centrifugal pump rotor. The bearing body 5 is located on the right side of the mechanical seal gland 3 and is connected to the mechanical seal gland 3 by bolts. The bearing body 5, installed on the right side of the mechanical seal gland 3 and connected to the mechanical seal gland 3 by four bolts, mainly supports and positions the bearing 6, ensuring its long-term operation. Normal operation; locking gasket 9 is installed on pump shaft 10, located between bearing 6 and locking nut 8. Locking gasket 9 and locking nut 8 are installed on the right side of bearing 6, respectively. Their function is to prevent axial movement of bearing 6; water-throwing ring 11 is installed on pump shaft 10, located between mechanical seal cover 3 and bearing retaining ring 7. When mechanical seal 12 is damaged, the transmission medium will flow outward from the shaft seal along pump shaft 10. The function of 1 is to promptly eject the axial transmission medium to prevent it from entering the bearing 6 and damaging it. The mechanical seal 12 is installed on the pump shaft 10 and is located between the mechanical seal positioning ring 13 and the mechanical seal cover 3. The mechanical seal 12 is installed on the left side of the mechanical seal cover 3 and plays an axial sealing role to prevent the transmission medium from leaking along the axial direction. The mechanical seal positioning ring 13 is installed on the left side of the mechanical seal 12 and plays a positioning role for the mechanical seal 12 to ensure that the mechanical seal 12 is in normal working condition.
[0022] The working principle and usage process of this invention are as follows: In use, first connect the power supply to rotate the pump shaft 10, start the device, and begin operation. The pump casing 1 and the sealing body 2 are sealed at the end face by a second rubber sealing ring 14 to prevent leakage of the conveyed medium along the end face. The sealing body 2 and the mechanical seal cover 3 are sealed at the end face by a first rubber sealing ring 4 to prevent leakage of the conveyed medium along the end face. Another major function of the mechanical seal cover 3 is to connect the bearing body 5 with four bolts, providing connection strength and axial positioning, thereby shortening the axial span of the centrifugal pump rotor. The bearing body 5 is connected to the mechanical seal cover 3 by four bolts, providing support and positioning for the bearing 6 to ensure its long-term normal operation. Locking washers 9 and locking nuts 8 are installed on the right side of the bearing 6, mounted on the pump shaft 10, to prevent axial movement of the bearing 6. The bearing 6 is installed inside the bearing body 5, mounted on the pump shaft 10, providing support and transmission. A bearing retaining ring 7 is installed on the left side of the bearing body 5, mounted on the pump shaft 10, to position the bearing 6. A water-slinging ring 11 is installed on the pump shaft, located between the mechanical seal cover 3 and the bearing retaining ring. Between points 7 and 8, when the mechanical seal 12 fails, the transmission medium will flow outward from the shaft seal position along the pump shaft 10. The function of the water-throwing ring 11 is to promptly throw out the transmission medium in the axial direction, preventing it from entering the bearing 6 and damaging it. The mechanical seal 12 is installed on the left side of the mechanical seal cover 3, which is mounted on the pump shaft 10 and serves as an axial seal to prevent the transmission medium from leaking along the axial direction. The mechanical seal positioning ring 13 is installed on the left side of the mechanical seal 12, which is mounted on the pump shaft 10 and serves to position the mechanical seal 12, ensuring that the mechanical seal 12 is in normal working condition. This device adopts... The compact axial design minimizes the axial span of the centrifugal pump. The special mechanical seal gland 3 design not only ensures the shaft sealing function of the centrifugal pump but also serves to connect the bearing body 5, effectively improving the vibration and operational performance of the pump unit 10 during operation, extending the lifespan of the pump unit rotor components, and saving on pump unit operation and maintenance costs. At the same time, the shortened axial length of the pump unit also means a reduction in the weight of the pump unit, reducing the production cost of pump unit components. The ingenious rotor support and shaft seal structure design also makes subsequent disassembly and maintenance more convenient.
[0023] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. A compact centrifugal pump rotor with a supported shaft seal structure, characterized in that: The system includes a pump housing (1), a sealing body (2) inside the pump housing (1), an organic seal cover (3) on one side of the sealing body (2), a first rubber sealing ring (4) between the sealing body (2) and the organic seal cover (3), a bearing body (5) on one side of the organic seal cover (3), a bearing (6) inside the bearing body (5), a bearing retainer (7) on one side of the bearing (6), and a locking nut (8) on the other side of the bearing (6). A locking washer (9) is provided between the bearing (6) and the locking nut (8). A pump shaft (10) is provided inside the bearing (6). A water-throwing ring (11) is provided near the mechanical seal cover (3) of the pump shaft (10). A mechanical seal (12) is provided between the pump shaft (10) and the mechanical seal cover (3). A mechanical seal positioning ring (13) is provided near the mechanical seal (12) of the pump shaft (10). A second rubber sealing ring (14) is provided between the pump housing (1) and the sealing body (2).
2. The compact centrifugal pump rotor with supported shaft seal structure according to claim 1, characterized in that: The sealing body (2) is located between the pump housing (1) and the mechanical seal cover (3), and the sealing body (2) is connected to the pump housing (1) by bolts.
3. The compact centrifugal pump rotor with supported shaft seal structure according to claim 1, characterized in that: The mechanical seal cover (3) is located between the sealing body (2) and the bearing body (5), and the mechanical seal cover (3) is connected to the sealing body (2) by bolts.
4. The compact centrifugal pump rotor with supported shaft seal structure according to claim 1, characterized in that: The bearing body (5) is located on the right side of the mechanical seal cover (3), and the bearing body (5) is connected to the mechanical seal cover (3) by bolts.
5. The compact centrifugal pump rotor with supported shaft seal structure according to claim 1, characterized in that: The locking washer (9) is installed on the pump shaft (10) and is located between the bearing (6) and the locking nut (8).
6. The compact centrifugal pump rotor with supported shaft seal structure according to claim 1, characterized in that: The water-throwing ring (11) is installed on the pump shaft (10) and is located between the mechanical seal cover (3) and the bearing retaining ring (7).
7. The compact centrifugal pump rotor with supported shaft seal structure according to claim 1, characterized in that: The mechanical seal (12) is installed on the pump shaft (10) and is located between the mechanical seal positioning ring (13) and the mechanical seal cover (3).