Cooling and flushing structure of double suction pump
By setting an annular cooling chamber and coolant channel in the dual suction pump, and using external cooling water to cool the mechanical seal and bearing, the problem of shortening the life of the wearable parts of the dual suction pump by high-temperature medium is solved, and the long life operation of the mechanical seal and bearing is achieved.
Patent Information
- Application Number
- CN202422350714.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-25
- Publication Date
- 2025-08-08
- Estimated Expiration
- 2034-09-25
AI Technical Summary
When the dual suction pump conveys high-temperature medium, the service life of mechanical seals and bearings is greatly affected by high temperatures, and the existing technology is difficult to effectively cool, resulting in a shortening of the service life of mechanical seals and bearing components.
A dual suction pump cooling and flushing structure is designed, by setting an annular cooling chamber and a coolant channel on the pump shaft, the mechanical seal and bearing components are cooled by using external circulating cooling water to reduce the temperature and prevent heat transfer.
It effectively reduces the temperature of mechanical seals, prevents high-temperature medium from transferring heat to the bearings, and extends the service life of mechanical seals and bearings.
Smart Images
Figure CN223203333U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of water pumps, in particular to a double-suction pump cooling and flushing structure. Background Art
[0002] The mechanical seals and bearings in double-suction pumps are the main vulnerable parts, especially when conveying high-temperature media. High temperature not only directly affects the service life of the mechanical seals, but also transfers heat to the bearing components through the shaft, causing the bearing operating temperature to be high and the bearing service life to be reduced. Utility Model Content
[0003] The technical problem to be solved by the utility model is to provide a double-suction pump cooling and flushing structure in view of the deficiencies of the above-mentioned prior art.
[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is:
[0005] A double-suction pump cooling and flushing structure includes a pump seat, a pump cover is connected to the upper end of the pump seat, bearing seats are connected to both sides of the pump seat, bearings are installed in the bearing seats, a pump shaft is passed between the pump seat and the pump cover, both ends of the pump shaft are connected to the bearings, an impeller is installed on the pump shaft through a key block, shaft sleeves are provided on both sides of the impeller, the shaft sleeve is sleeved on the pump shaft, a mechanical seal and an end cover are provided on the outside of the shaft sleeve, the mechanical seal is sleeved on the shaft sleeve, the periphery of the end cover is connected to the pump seat and the pump cover by bolts, the end cover presses the mechanical seal, washers and locking nuts are provided on both sides of the pump shaft, the locking nut locks the impeller between the shaft sleeve and the shaft sleeve through the washer, and a first annular groove and a second annular groove are respectively processed on both sides of the pump shaft at the sleeve installation position. The first annular groove and the second annular groove and the inner walls of the sleeves on both sides of the pump shaft form a first annular cooling cavity and a second annular cooling cavity. The pump shaft is processed with a connecting groove at the impeller installation position, and the first annular cooling cavity is communicated with the second annular cooling cavity through the connecting groove. A coolant inlet and a coolant outlet are respectively opened on the sleeves on both sides of the pump shaft. The coolant inlet is communicated with the first annular cooling cavity, and the coolant outlet is communicated with the second annular cooling cavity. An organic seal cavity is processed in the pump base and the pump cover, and the mechanical seal is in the mechanical seal cavity. A coolant inlet joint and a coolant outlet joint are installed on both sides of the pump cover. The coolant inlet joint and the coolant outlet joint are respectively communicated with the mechanical seal cavity on both sides of the pump shaft, and the coolant inlet and the coolant outlet are located in the mechanical seal cavity.
[0006] Furthermore, a sealing ring is installed at the mouth ring of the impeller.
[0007] Furthermore, a cooling cavity is provided on the hub of the impeller, and the connecting groove on the pump shaft passes through the cooling cavity.
[0008] Furthermore, a sealing ring is provided between the tail of the sleeve and the pump shaft.
[0009] Compared with the existing technology, the double-suction pump cooling and flushing structure of the utility model has a simple structure and is mainly used for conveying high-temperature media. The rotor part can be cooled by external circulating cooling water, which can not only reduce the temperature of the mechanical seal cavity where the mechanical seal is located, but also prevent the high-temperature medium from transferring heat through the axial bearing components, thereby extending the service life of the bearing. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1 It is a structural diagram of the utility model;
[0011] Figure 2 yes Figure 1 Enlarged view of point A in the middle;
[0012] Among them, 1. Pump seat, 2. Pump cover, 3. Bearing seat, 4. Bearing, 5. Pump shaft, 6. Impeller, 7. Sealing ring, 8. Shaft sleeve, 9. Mechanical seal, 10. End cover, 11. Gasket, 12. Locking nut, 13. First annular cooling chamber, 14. Second annular cooling chamber, 15. Connecting groove, 16. Cooling chamber, 17. Coolant inlet, 18. Coolant outlet, 19. Coolant inlet connector, 20. Coolant outlet connector, 21. Machine seal chamber, 22. Sealing ring. DETAILED DESCRIPTION
[0013] The technical solutions in the embodiments of the present invention will be described clearly and completely below.
[0014] like Figure 1 and Figure 2As shown, a double-suction pump cooling and flushing structure includes a pump base 1, a pump cover 2 is connected to the upper end of the pump base 1, bearing seats 3 are connected on both sides of the pump base 1, bearings 4 are installed in the bearing seats 3, a pump shaft 5 is passed between the pump base 1 and the pump cover 2, both ends of the pump shaft 5 are connected to the bearings 4, an impeller 6 is installed on the pump shaft 5 through a key block, a sealing ring 7 is installed at the mouth ring of the impeller 6, shaft sleeves 8 are provided on both sides of the impeller 6, the shaft sleeve 8 is sleeved on the pump shaft 5, a mechanical seal 9 and an end cover 10 are provided on the outside of the shaft sleeve 8, the mechanical seal 9 is sleeved on the shaft sleeve 8, the periphery of the end cover 10 is connected to the pump base 1 and the pump cover 2 by bolts, the end cover 10 presses the mechanical seal 9, and washers 11 and locking nuts 12 are provided on both sides of the pump shaft 5, and the locking nuts 12 are tightened by washers 11 locking sleeve 8 and impeller 6 between sleeve 8, a first annular groove and a second annular groove are respectively processed on both sides of the pump shaft 5 at the installation position of sleeve 8, the length of the first annular groove and the second annular groove are shorter than the sleeve 8, the first annular groove and the second annular groove and the inner wall of the sleeve 8 on both sides of the pump shaft 5 form a first annular cooling cavity 13 and a second annular cooling cavity 14, the pump shaft 5 is processed with a connecting groove 15 at the impeller installation position, the first annular cooling cavity 13 is connected with the second annular cooling cavity 14 through the connecting groove 15, a cooling cavity 16 is opened on the hub of the impeller 6, the connecting groove 15 on the pump shaft 5 passes through the cooling cavity 16, the cooling cavity 16 is a fan-shaped structure, the cooling water fills the cooling cavity during the flow process, and cools the impeller 6.
[0015] In this embodiment, two coolant inlets 17 and two coolant outlets 18 are respectively provided on the shaft sleeves 8 on both sides of the pump shaft 5. The coolant inlet 17 is communicated with the first annular cooling cavity 13, and the coolant outlet 18 is communicated with the second annular cooling cavity 14. Coolant inlet joints 19 and coolant outlet joints 20 are installed on both sides of the pump cover 2. An organic seal cavity 21 is machined in the pump seat 1 and the pump cover 2. The coolant inlet joint 19 and the coolant outlet joint 20 are respectively communicated with the machine seal cavity 21 on both sides of the pump shaft 5. At the same time, the coolant inlet 17 and the coolant outlet 18 are in the machine seal cavity 21. When the double-suction pump is working, the cooling water is connected to the cooling water from the coolant inlet joint 19, and the cooling water enters the machine seal cavity. In the cavity 21, the mechanical seal 9 on one side is cooled, and then enters the first annular cooling cavity 13 through the coolant inlet 17 on the sleeve 8, and then enters the second annular cooling cavity 14 through the connecting groove 15. The cooling water passes through the cooling cavity 16, and then the cooling water enters the mechanical seal cavity 21 through the coolant outlet 18 on the sleeve 8 to cool the mechanical seal 9 on the other side, and finally flows out from the coolant outlet joint 20. The cooling water circulates throughout the whole process, continuously taking away the heat of the high-temperature medium, reducing the temperature of the mechanical seal cavity 21 where the mechanical seal 9 is located, and at the same time preventing the high-temperature medium from transferring heat to the bearing components through the pump shaft 5, thereby achieving the purpose of extending the service life of the mechanical seal 9 and the bearing 4.
[0016] A sealing ring 22 is provided between the tail end of the shaft sleeve 8 and the pump shaft 5 to prevent leakage of cooling water.
[0017] The present invention is not limited to the embodiments described. Those skilled in the art may make some modifications or changes without departing from the spirit or scope of the present invention. Therefore, the scope of protection of the present invention shall be based on the scope defined in the claims.
Claims
1. A double-suction pump cooling and flushing structure, comprising a pump base, a pump cover connected to the upper end of the pump base, bearing seats connected to both sides of the pump base, bearings installed in the bearing seats, a pump shaft passing between the pump base and the pump cover, both ends of the pump shaft are connected to the bearings, an impeller is installed on the pump shaft through a key block, shaft sleeves are provided on both sides of the impeller, the shaft sleeve is sleeved on the pump shaft, a mechanical seal and an end cover are provided on the outside of the shaft sleeve, the mechanical seal is sleeved on the shaft sleeve, the periphery of the end cover is connected to the pump base and the pump cover by bolts, the end cover presses the mechanical seal, washers and locking nuts are provided on both sides of the pump shaft, the locking nut locks the impeller between the shaft sleeve and the shaft sleeve through the washer, and is characterized in that: A first annular groove and a second annular groove are respectively processed on both sides of the pump shaft at the shaft sleeve installation position, and the first annular groove and the second annular groove form a first annular cooling cavity and a second annular cooling cavity with the inner walls of the sleeves on both sides of the pump shaft. The pump shaft is processed with a connecting groove at the impeller installation position, and the first annular cooling cavity is communicated with the second annular cooling cavity through the connecting groove. A coolant inlet and a coolant outlet are respectively opened on the shaft sleeves on both sides of the pump shaft, the coolant inlet is communicated with the first annular cooling cavity, and the coolant outlet is communicated with the second annular cooling cavity. An organic seal cavity is processed in the pump seat and the pump cover, and the mechanical seal is in the mechanical seal cavity. A coolant inlet joint and a coolant outlet joint are installed on both sides of the pump cover, and the coolant inlet joint and the coolant outlet joint are respectively communicated with the mechanical seal cavity on both sides of the pump shaft, and the coolant inlet and the coolant outlet are located in the mechanical seal cavity.
2. A double-suction pump cooling and flushing structure according to claim 1, characterized in that: A sealing ring is installed at the mouth ring of the impeller.
3. A double-suction pump cooling and flushing structure according to claim 1, characterized in that: A cooling cavity is provided on the hub of the impeller, and the connecting groove on the pump shaft passes through the cooling cavity.
4. A double-suction pump cooling and flushing structure according to claim 1, characterized in that: A sealing ring is provided between the tail of the shaft sleeve and the pump shaft.