A double-suction pump sealing ring combined with impeller spiral groove sealing return water structure
By employing a sealing ring and impeller helical groove matching structure in the double-suction pump, and utilizing the design that the rotation direction of the helical groove is opposite to that of the main shaft, the leakage problem between the sealing ring and the impeller is solved, thereby improving the stability and efficiency of the pump.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI LIANCHENG GRP SUZHOU
- Filing Date
- 2025-08-12
- Publication Date
- 2026-06-30
AI Technical Summary
In traditional double-suction pumps, the design of the gap between the impeller and the sealing ring can cause leakage. If the gap is too small, it will cause friction; if the gap is too large, it will cause a large leakage flow, which will affect the pump efficiency.
The pump employs a spiral groove sealing structure, where the sealing ring engages with the impeller's spiral groove. This utilizes the spiral principle to transport the liquid from the pump's suction chamber to the discharge chamber, preventing leakage.
The increased clearance through the spiral groove structure prevents the sealing ring from scraping or meshing with the impeller, thus improving the stability and efficiency of the water pump. It is also easy to assemble and does not take up extra space.
Smart Images
Figure CN224432883U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of double-suction pump sealing technology, and in particular to a double-suction pump sealing ring combined with impeller spiral groove sealing return water structure. Background Technology
[0002] Traditional double-suction pumps have always had leakage problems due to the gap between the impeller and the sealing ring. If the gap is too small, it will cause friction between the impeller and the sealing ring when they rotate at high speed. If the gap is too large, it will cause a large leakage flow, resulting in a decrease in pump efficiency. Summary of the Invention
[0003] To address the problems existing in the prior art, this utility model provides a spiral groove sealing structure that is easy to disassemble and maintain. The sealing ring cooperates with the impeller spiral groove, utilizing the spiral principle to assist in the hydraulic transfer of part of the pump suction chamber to the pump discharge chamber, thus avoiding leakage problems.
[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:
[0005] This utility model proposes a double-suction pump sealing return water structure with a sealing ring and impeller helical groove. The double-suction pump includes a main shaft, a pump body, a pump cover, a sealing ring, and an impeller. The impeller includes a hub and a rim. A first sealing ring is provided between one side of the rim and the pump body and pump cover. The rim has an annular first contact surface near the first sealing ring. The first contact surface has a first helical groove along the axial direction. A second sealing ring is provided between the other side of the rim and the pump body and pump cover. The rim has an annular second contact surface near the second sealing ring. The second contact surface has a second helical groove along the axial direction. The rotation direction of the helical grooves in the first and second helical grooves is opposite to the rotation direction of the main shaft.
[0006] Furthermore, radial sealing rings are provided between the first sealing ring, the second sealing ring, and the main shaft.
[0007] Compared with the prior art, the present invention has the following technical effects:
[0008] This invention changes the original straight surface clearance fit between the sealing ring and the impeller to a spiral groove fit. Spiral grooves are added on both sides of the impeller, and their rotation direction is opposite to that of the main shaft. This spiral groove structure can increase the clearance in the clearance fit, avoiding the occurrence of scraping or meshing between the sealing ring and the impeller mating surface.
[0009] The spiral groove of this utility model is easy to process, has a reasonable design, does not occupy the original space, is stable and reliable, and is easy to assemble. Attached Figure Description
[0010] Figure 1 This is an overall structural diagram of an embodiment of this application;
[0011] Figure 2 yes Figure 1 A magnified view of a portion of region C.
[0012] The parts in the attached diagram are labeled as follows:
[0013] 1. Main shaft, 2. Pump body, 3. Pump cover, 4. Impeller, 5. Hub
[0014] 6. Wheel flange, 7. First sealing ring, 8. Second sealing ring, 9. Sealing ring
[0015] 61 First spiral groove, 62 Second spiral groove,
[0016] A is a high-pressure area, and B is a low-pressure area. Detailed Implementation
[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0018] This utility model proposes a double-suction pump sealing ring combined with impeller spiral groove sealing return water structure. The double-suction pump includes a main shaft 1, a pump body 2, a pump cover 3 and an impeller 4. The impeller 4 includes a hub 5 and a rim 6.
[0019] like Figure 1 As shown, a first sealing ring 7 is provided between one side of the rim 6 and the pump body 2 and the pump cover 3. The rim 6 has an annular first contact surface near the first sealing ring 7. The first contact surface has a first spiral groove 61 along the axial direction.
[0020] A second sealing ring 8 is provided between the other side of the rim 6 and the pump body 2 and pump cover 3. The rim 6 has an annular second contact surface near the second sealing ring 8. The second contact surface has a second helical groove 62 along the axial direction. The rotation direction of the helix in the first helical groove 61 and the second helical groove 62 is opposite to the rotation direction of the main shaft 1. (See [reference]) Figure 2 .
[0021] Radial sealing rings 9 are respectively provided between the first sealing ring 7, the second sealing ring 8 and the main shaft 1.
[0022] like Figure 1As shown, during the operation of the water pump, since the pressure in high-pressure zone A is higher than that in low-pressure zone B, there is a tendency for liquid in high-pressure zone A to leak into low-pressure zone B through the first spiral groove 61 and the second spiral groove 62. When the liquid reaches the area of the first spiral groove 61 and the second spiral groove 62, under the push of the spiral grooves in the opposite direction to the main shaft 1, the liquid energy is reduced, and the liquid that is about to leak is driven back to high-pressure zone A to ensure sealing.
[0023] When the liquid is in the low-pressure zone B near the end faces of the first spiral groove 61 and the second spiral groove 62, it will be captured by the spiral grooves, and thus, under the spiral force, it will have a certain water return capacity.
[0024] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structure made using the contents of this utility model specification and drawings, or directly or indirectly applied to other related technical fields, are similarly included within the patent protection scope of this utility model.
Claims
1. A double suction pump sealing ring matching impeller helical groove backwater structure, the double suction pump comprising a main shaft (1), a pump body (2), a pump cover (3) and an impeller (4), the impeller (4) comprising a hub (5) and a rim (6), characterized in that, The first sealing ring (7) and the second sealing ring (8) are respectively provided with a radial sealing ring (9) between the main shaft (1).
2. The double suction pump seal ring fitted impeller helical groove seal return structure according to claim 1, characterized in that, The first sealing ring (7) and the second sealing ring (8) are respectively provided with a radial sealing ring (9) between the main shaft (1).