Novel double suction pump sealing structure
By introducing a medium barrier structure and filter tube filtration system into the double-suction pump, the problem of isolating the shaft from the medium is solved, the shaft is protected from corrosion, the bearing disassembly and assembly are simplified, the medium is filtered, and the service life and maintainability of the pump are improved.
Patent Information
- Application Number
- CN202422758390.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-13
- Publication Date
- 2025-10-03
- Estimated Expiration
- 2034-11-13
AI Technical Summary
The sealing structure of the existing double-suction pump cannot effectively isolate the shaft from the medium, causing the medium to corrode the shaft, affecting the service life and cost of the pump.
The medium barrier structure is adopted, including the shaft sleeve, sealing chamber, filler, water seal ring and O-ring, to achieve isolation between the shaft and the medium, and filter the medium through the filter tube and filter element to protect the shaft from corrosion and facilitate the disassembly and assembly of the bearing.
It achieves complete isolation between the shaft and the medium, protects the shaft from corrosion, simplifies the disassembly and assembly process of the bearing, and filters the medium to prevent impurities from damaging the impeller.
Smart Images
Figure CN223411092U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of double-suction pump seals, in particular to a novel double-suction pump seal structure. Background Art
[0002] Double-suction pump is an important form of centrifugal pump, which has the characteristics of high head and large flow, and is widely used in engineering.
[0003] The traditional sealing structure of double-suction pumps on the market cannot completely isolate the shaft from the medium. When the medium is highly corrosive, it will corrode the shaft of the double-suction pump, affecting the service life of the pump and causing cost waste.
[0004] Now, a new double-suction pump sealing structure is proposed to solve the above problems. Utility Model Content
[0005] The purpose of the utility model is to provide a novel double-suction pump sealing structure to solve the problem in the above background technology that the shaft cannot be completely isolated from the medium.
[0006] To achieve the above-mentioned object, the present invention provides the following technical solution: a novel double-suction pump sealing structure, comprising a pump body, a shaft movably connected to the interior of the pump body, an impeller key installed inside the shaft, an impeller installed on the outside of the shaft, two sets of bearings movably connected to the outer ends of the sealing body installed on both sides of the shaft, a water inlet opened at the front end of the pump body, a drain outlet opened at the rear end of the pump body, and a medium barrier structure provided on the outside of the shaft;
[0007] The medium barrier structure includes a sleeve, which is sleeved on the outside of the shaft. A sealing cavity is defined between the sealing body and the sleeve. A first filler is installed on the side of the sealing cavity close to the sleeve, and a second filler is installed on the side of the sealing cavity away from the sleeve. A water seal ring is installed between the first filler and the second filler. A sealing seat is installed on the side of the sealing cavity away from the impeller. A first bolt is fixedly connected between the sealing seat and the sealing body, and an O-ring is installed between the sleeve and the impeller.
[0008] Preferably, the inner diameter of the shaft sleeve matches the outer diameter of the shaft, and the first filler fits tightly against the shaft sleeve.
[0009] Preferably, the water inlet, the pump body and the drain outlet are internally connected, and the inner diameter of the water inlet is larger than the inner diameter of the drain outlet.
[0010] Preferably, a fixing seat is fixedly connected to the side of the outer side of the bearing close to the pump body, and a connecting seat is installed on the side of the bearing away from the pump body. Multiple sets of second bolts are movably connected between the fixing seat and the connecting seat. A groove is provided between the bottom end of the fixing seat and the bearing, and an insert ring is fixedly connected to the side of the connecting seat close to the pump body.
[0011] Preferably, the outer contour of the insert ring matches the groove, the connecting seat and the fixing seat can be fixed by second bolts, and multiple groups of the second bolts are symmetrically distributed.
[0012] Preferably, a filter tube is installed at the front end of the water inlet, a filter frame is movably connected inside the filter tube, a filter element is installed inside the filter frame, and a handle is installed at the rear end inside the filter frame.
[0013] Preferably, the inner diameter of the filter tube matches the outer diameter of the filter frame, and the filter frame can be pulled out from the inside of the filter tube by a handle.
[0014] Compared with the prior art, the beneficial effects of the present invention are: the new double-suction pump sealing structure not only achieves complete isolation between the shaft and the medium, but also facilitates the disassembly and assembly of the bearing and filters the medium entering the pump body;
[0015] (1) A sealing body, a sealing seat, a first bolt, a sealing chamber, a first filler, a second filler, a water seal ring, a shaft sleeve and an O-ring are provided. When in use, the medium enters the pump body through the water inlet and is discharged from the drain outlet after the impeller rotates. When the medium erodes strongly, the shaft is more damaged. A shaft sleeve is sleeved on the outer side of the shaft, and an O-ring is installed between the shaft sleeve and the impeller, thereby isolating the medium from the shaft. The O-ring also prevents the medium from contacting the shaft from the side close to the impeller. A sealing body is installed on both sides of the pump body, a sealing chamber is opened between the sealing body and the shaft sleeve, a first filler is installed on the side close to the shaft sleeve in the sealing chamber, a second filler is installed on the side away from the shaft sleeve in the sealing chamber, and a water seal ring is installed between the first filler and the second filler, thereby preventing the medium from contacting the shaft from the side away from the impeller, thereby protecting the shaft and preventing it from being corroded.
[0016] (2) By providing a fixed seat, a connecting seat, a second bolt, a groove and an insert ring, when the bearing of the double-suction pump is disassembled and assembled, the bearing of the commonly used double-suction pump needs to be connected to the entire shaft for disassembly and assembly, and the steps are relatively cumbersome. By providing a fixed seat and a connecting seat, the fixed seat is connected to the pump body, and a groove begins to be formed inside the fixed seat. A insert ring is installed on the side of the connecting seat close to the pump body, and the insert ring matches the groove. After manually opening the second bolt, the connecting seat can be pulled out from the inside of the fixed seat. At this time, the bearing is exposed to the outside, thereby facilitating the disassembly and assembly of the bearing;
[0017] (3) By providing a filter tube, a filter rack, a filter element and a handle, when in use, a filter tube is installed at the front end of the water inlet, the filter tube is movably connected to the filter rack inside, and a filter element is installed inside the filter rack, so that the medium entering the pump body can be filtered to avoid damage to the impeller caused by larger impurities in the medium. After working for a certain period of time, the double-suction pump is stopped, and the filter rack is pulled out of the filter tube through the handle to clean or replace the filter element. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 This is a schematic diagram of the front cross-sectional structure of the present utility model;
[0019] Figure 2 This is a side structural diagram of the present utility model;
[0020] Figure 3 For the utility model Figure 1 A schematic diagram of the enlarged structure of the local section at point A in the middle;
[0021] Figure 4 For the utility model Figure 1 Schematic diagram of the enlarged structure of the local section at point B in the middle.
[0022] In the figure: 1. Pump body; 2. Shaft; 3. Impeller key; 4. Impeller; 5. Seal; 6. Bearing; 7. Water inlet; 8. Drain; 9. Seal seat; 10. First bolt; 11. Sealing chamber; 12. First filler; 13. Second filler; 14. Water seal ring; 15. Bushing; 16. O-ring; 17. Fixed seat; 18. Connecting seat; 19. Second bolt; 20. Groove; 21. Insert ring; 22. Filter tube; 23. Filter frame; 24. Filter element; 25. Handle. DETAILED DESCRIPTION
[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0024] Example 1: Please refer to Figure 1-4 A new double-suction pump sealing structure includes a pump body 1, a shaft 2 is movably connected to the inside of the pump body 1, an impeller key 3 is installed inside the shaft 2, an impeller 4 is installed on the outside of the shaft 2, a sealing body 5 is installed on both sides of the shaft 2, two sets of bearings 6 are movably connected at both ends of the outer side of the shaft 2, a water inlet 7 is opened at the front end of the pump body 1, a drain outlet 8 is opened at the rear end of the pump body 1, and a medium barrier structure is provided on the outside of the shaft 2;
[0025] See also Figure 1-4 A new double-suction pump sealing structure also includes a medium barrier structure, which includes a shaft sleeve 15. The shaft sleeve 15 is sleeved on the outside of the shaft 2. A sealing chamber 11 is opened between the sealing body 5 and the shaft sleeve 15. A first filler 12 is installed on the side of the sealing chamber 11 close to the shaft sleeve 15, and a second filler 13 is installed on the side of the sealing chamber 11 away from the shaft sleeve 15. A water seal ring 14 is installed between the first filler 12 and the second filler 13. A sealing seat 9 is installed on the side of the sealing chamber 11 away from the impeller 4. A first bolt 10 is fixedly connected between the sealing seat 9 and the sealing body 5, and an O-ring 16 is installed between the shaft sleeve 15 and the impeller 4.
[0026] The inner diameter of the sleeve 15 matches the outer diameter of the shaft 2, the first filler 12 fits tightly against the sleeve 15, the water inlet 7, the pump body 1, and the drain port 8 are internally connected, and the inner diameter of the water inlet 7 is larger than the inner diameter of the drain port 8;
[0027] Specifically, if Figure 1 and Figure 3 As shown, when in use, the medium enters the pump body 1 through the water inlet 7, is discharged from the drain port 8 after the impeller 4 rotates, and when the medium erodes strongly, the shaft 2 is more damaged. A shaft sleeve 15 is sleeved on the outside of the shaft 2, and an O-ring 16 is installed between the shaft sleeve 15 and the impeller 4, so as to achieve isolation between the medium and the shaft 2. The setting of the O-ring 16 also prevents the medium from contacting the shaft 2 from the side close to the impeller 4. A sealing body 5 is installed on both sides of the pump body 1, and a sealing cavity 11 is opened between the sealing body 5 and the shaft 2 sleeve. A first filler 12 is installed on the side of the sealing cavity 11 close to the shaft sleeve 15, and a second filler 13 is installed on the side of the sealing cavity 11 away from the shaft sleeve 15. A water seal ring 14 is installed between the first filler 12 and the second filler 13, so that the medium cannot contact the shaft 2 through the side away from the impeller 4, thereby protecting the shaft 2 and preventing it from being eroded.
[0028] Embodiment 2: A fixing seat 17 is fixedly connected to the side of the outer side of the bearing 6 close to the pump body 1, and a connecting seat 18 is installed on the side of the bearing 6 away from the pump body 1. Multiple groups of second bolts 19 are movably connected between the fixing seat 17 and the connecting seat 18. A groove 20 is opened between the bottom end of the fixing seat 17 and the bearing 6. An insert ring 21 is fixedly connected to the side of the connecting seat 18 close to the pump body 1. The outer contour of the insert ring 21 matches the groove 20. The connecting seat 18 and the fixing seat 17 can be fixed by second bolts 19. The multiple groups of second bolts 19 are symmetrically distributed.
[0029] Specifically, if Figure 1 、 Figure 2 and Figure 4As shown, when the shaft 2 of the double-suction pump is disassembled and assembled, the bearing 6 of the commonly used double-suction pump needs to be connected to the entire shaft 2 for disassembly and assembly, and the steps are relatively cumbersome. By setting a fixing seat 17 and a connecting seat 18, the fixing seat 17 is connected to the pump body 1, and a groove 20 begins to be formed inside the fixing seat 17. A plug ring 21 is installed on the side of the connecting seat 18 close to the pump body 1, and the plug ring 21 matches the groove 20. After manually opening the second bolt 19, the connecting seat 18 can be pulled out from the inside of the fixing seat 17. At this time, the bearing 6 is exposed to the outside, thereby facilitating the disassembly and assembly of the bearing 6.
[0030] Example 3: A filter tube 22 is installed at the front end of the water inlet 7, and a filter frame 23 is movably connected to the inside of the filter tube 22. A filter element 24 is installed inside the filter frame 23. A handle 25 is installed at the rear end of the filter frame 23. The inner diameter of the filter tube 22 matches the outer diameter of the filter frame 23. The filter frame 23 can be pulled out from the inside of the filter tube 22 through the handle 25;
[0031] Specifically, if Figure 1 and Figure 2 As shown, when in use, a filter tube 22 is installed at the front end of the water inlet 7, and a filter frame 23 is movably connected to the inside of the filter tube 22. A filter element 24 is installed inside the filter frame 23, thereby filtering the medium entering the pump body 1 to prevent larger impurities in the medium from causing damage to the impeller 4. After working for a certain period of time, the double-suction pump is stopped, and the filter frame 23 is pulled out of the filter tube 22 by the handle 25, thereby cleaning or replacing the filter element 24.
[0032] Working principle: When the present invention is in use, first, the medium enters the pump body 1 through the water inlet 7, and is discharged from the drain port 8 after the impeller 4 rotates. When the medium erodes strongly, the shaft 2 is more damaged. A shaft sleeve 15 is sleeved on the outside of the shaft 2, and an O-ring 16 is installed between the shaft sleeve 15 and the impeller 4, so as to achieve isolation between the medium and the shaft 2. The setting of the O-ring 16 also prevents the medium from contacting the shaft 2 from the side close to the impeller 4. A sealing body 5 is installed on both sides of the pump body 1, and a sealing chamber 11 is opened between the sealing body 5 and the shaft 2 sleeve. A first filler 12 is installed on the side of the sealing chamber 11 close to the shaft sleeve 15, and a second filler 13 is installed on the side of the sealing chamber 11 away from the shaft sleeve 15. A water seal ring 14 is installed between the first filler 12 and the second filler 13, so that the medium cannot contact the shaft 2 through the side away from the impeller 4, thereby protecting the shaft 2 and preventing it from being eroded. Secondly, when the shaft 2 bearing of the double-suction pump is disassembled and assembled , the bearing 6 of the commonly used double-suction pump needs to be connected to the entire shaft 2 for disassembly and assembly, and the steps are relatively cumbersome. By setting a fixing seat 17 and a connecting seat 18, the fixing seat 17 is connected to the pump body 1, and a groove 20 is formed inside the fixing seat 17. A plug ring 21 is installed on the side of the connecting seat 18 close to the pump body 1, and the plug ring 21 matches the groove 20. After manually opening the second bolt 19, the connecting seat 18 can be pulled out from the inside of the fixing seat 17. At this time, the bearing 6 is exposed to the outside, thereby facilitating the disassembly and assembly of the bearing 6. At the same time, a filter tube 22 is installed at the front end of the water inlet 7, and a filter frame 23 is movably connected to the inside of the filter tube 22. A filter element 24 is installed inside the filter frame 23, thereby filtering the medium entering the pump body 1 to prevent damage to the impeller 4 caused by larger impurities in the medium. After working for a certain period of time, stop the double-suction pump, and pull the filter frame 23 out of the filter tube 22 by the handle 25, so as to achieve cleaning or replacement of the filter element 24.
[0033] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.
Claims
1. A new double-suction pump sealing structure, comprising a pump body (1), characterized in that: The pump body (1) is movably connected to a shaft (2), an impeller key (3) is installed inside the shaft (2), an impeller (4) is installed on the outside of the shaft (2), sealing bodies (5) are installed on both sides of the shaft (2), two sets of bearings (6) are movably connected at both ends of the outside of the shaft (2), a water inlet (7) is provided at the front end of the pump body (1), a water outlet (8) is provided at the rear end of the pump body (1), and a medium barrier structure is provided on the outside of the shaft (2); The medium barrier structure includes a shaft sleeve (15), the shaft sleeve (15) is sleeved on the outer side of the shaft (2), a sealing cavity (11) is provided between the sealing body (5) and the shaft sleeve (15), a first filler (12) is installed on the side of the sealing cavity (11) close to the shaft sleeve (15), a second filler (13) is installed on the side of the sealing cavity (11) away from the shaft sleeve (15), a water seal ring (14) is installed between the first filler (12) and the second filler (13), a sealing seat (9) is installed on the side of the sealing cavity (11) away from the impeller (4), a first bolt (10) is fixedly connected between the sealing seat (9) and the sealing body (5), and an O-ring (16) is installed between the shaft sleeve (15) and the impeller (4).
2. A new double-suction pump sealing structure according to claim 1, characterized in that: The inner diameter of the shaft sleeve (15) matches the outer diameter of the shaft (2), and the first filler (12) and the shaft sleeve (15) are tightly fitted.
3. A new double-suction pump sealing structure according to claim 1, characterized in that: The water inlet (7), the pump body (1), and the drain outlet (8) are internally connected, and the inner diameter of the water inlet (7) is larger than the inner diameter of the drain outlet (8).
4. A new double-suction pump sealing structure according to claim 1, characterized in that: A fixing seat (17) is fixedly connected to the side of the outer side of the bearing (6) close to the pump body (1), and a connecting seat (18) is installed on the side of the bearing (6) away from the pump body (1). A plurality of groups of second bolts (19) are movably connected between the fixing seat (17) and the connecting seat (18). A groove (20) is provided between the bottom end of the fixing seat (17) and the bearing (6), and an insert ring (21) is fixedly connected to the side of the connecting seat (18) close to the pump body (1).
5. A new double-suction pump sealing structure according to claim 4, characterized in that: The outer contour of the insert ring (21) matches the groove (20), and the connecting seat (18) and the fixing seat (17) can be fixed by second bolts (19), and multiple groups of the second bolts (19) are symmetrically distributed.
6. A new double-suction pump sealing structure according to claim 1, characterized in that: A filter tube (22) is installed at the front end of the water inlet (7), a filter frame (23) is movably connected inside the filter tube (22), a filter element (24) is installed inside the filter frame (23), and a handle (25) is installed at the rear end inside the filter frame (23).
7. A new double-suction pump sealing structure according to claim 6, characterized in that: The inner diameter of the filter tube (22) matches the outer diameter of the filter frame (23), and the filter frame (23) can be drawn out from the inside of the filter tube (22) via a handle (25).