Sealing device for shaft sleeve of water pump
By setting the sealing ring 2 in the water pump sleeve sealing device, the problem of water leakage after long-term use of the sealing device is solved, and a better sealing effect and a longer service life are achieved.
Patent Information
- Application Number
- CN202422555423.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-23
- Publication Date
- 2025-08-19
- Estimated Expiration
- 2034-10-23
AI Technical Summary
Existing water pump sleeve sealing devices are prone to water leakage after long-term use, resulting in damage to other parts.
A water pump sleeve sealing device is designed, including a pump shaft, a packing sealing sleeve and a water barrier sleeve. Seal ring one and a sealing ring two are provided. Seal ring two are always pressed by the sleeve to ensure the sealing effect and can maintain the seal even if the nut is loose.
It enhances the sealing effect, extends the service life of the water pump, prevents water leakage, and protects other parts from damage.
Smart Images
Figure CN223241697U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of sealing devices, in particular to a water pump shaft sleeve sealing device. Background Art
[0002] Each unit of the 3*660MW thermal power project is equipped with a closed water pump; to protect the pump shaft, multiple sleeves are set on both sides of the impeller, and sealing rings are set between the impeller and the sleeves, as well as between adjacent sleeves; the sleeves squeeze the sealing ring to seal the sleeves, and the ends of the sleeves are fixed with nuts; after long-term use, the nuts become loose, causing the sleeves to no longer squeeze the sealing ring, and the seal is destroyed, resulting in water leakage, and water flows along the inside of the sleeve to other locations, causing water intrusion and damage to other parts. Utility Model Content
[0003] The main purpose of the utility model is to provide a water pump shaft sleeve sealing device to solve the problem in the prior art that the water pump shaft sleeve sealing device is prone to water leakage after long-term use, causing damage to other parts.
[0004] In order to achieve the above-mentioned purpose, the utility model provides a water pump shaft sleeve sealing device, including a pump shaft, on which an impeller, two packing sealing sleeves and two water-retaining sleeves are installed; the packing sealing sleeve is located on the outside of the impeller, and the water-retaining sleeve is located on the outside of the packing sealing sleeve; a sealing ring 1 is provided between the impeller and the packing sealing sleeve and between the water-retaining sleeve and the packing sealing sleeve; a sealing ring 2 is provided between the water-retaining sleeve and the packing sealing sleeve and the pump shaft, and mounting grooves matching the sealing ring 2 are provided on the water-retaining sleeve and the packing sealing sleeve.
[0005] Furthermore, two bearings are installed on the pump shaft; the bearings are located on the outside of the water retaining sleeve; an elastic retaining ring and a nut for limiting are installed on the pump shaft, and the elastic retaining ring and the nut are respectively located on the outside of the bearings.
[0006] Furthermore, one end of the pump shaft is connected to a coupling via a key.
[0007] The utility model provides a second sealing ring, which can work together with the first sealing ring to seal, thereby enhancing the sealing effect and extending the service life of the water pump; by providing the second sealing ring, the second sealing ring is always in a state of being compressed by the shaft sleeve, and even if the first sealing ring fails due to loosening of the nut, the second sealing ring can still ensure the sealing of the shaft sleeve. BRIEF DESCRIPTION OF THE DRAWINGS
[0008] The drawings in the specification, which constitute a part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.
[0009] Figure 1 Schematic diagram of the structure of the water pump shaft sleeve sealing device in the embodiment;
[0010] In the figure: 1. Pump shaft; 2. Impeller; 3. Water retaining sleeve; 4. Packing seal sleeve; 5. Seal ring 1; 6. Seal ring 2; 7. Bearing; 8. Elastic retaining ring; 9. Nut; 10. Key. DETAILED DESCRIPTION
[0011] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.
[0012] like Figure 1 As shown, according to an embodiment of the present utility model, a water pump shaft sleeve sealing device is provided, including a pump shaft 1, on which an impeller 2, two packing sealing sleeves 4, and two water-retaining sleeves 3 are installed; the packing sealing sleeve 4 is located on the outside of the impeller 2, and the water-retaining sleeve 3 is located on the outside of the packing sealing sleeve 4; a sealing ring 1 5 is provided between the impeller 2 and the packing sealing sleeve 4 and between the water-retaining sleeve 3 and the packing sealing sleeve 4; a sealing ring 2 6 is provided between the water-retaining sleeve 3 and the packing sealing sleeve 4 and the pump shaft 1, and mounting grooves matching the sealing ring 2 6 are provided on the water-retaining sleeve 3 and the packing sealing sleeve 4.
[0013] Two bearings 7 are installed on the pump shaft 1, and the bearings 7 are located on the outside of the water retaining sleeve 3; an elastic retaining ring 8 and a nut 9 for limiting are installed on the pump shaft 1, and the elastic retaining ring 8 and the nut 9 are respectively located on the outside of the bearing 7; a retaining ring groove for installing the elastic retaining ring 8 is provided on the pump shaft 1.
[0014] One end of the pump shaft 1 is connected to a coupling via a key 11 , and the coupling is connected to the output shaft of the motor.
[0015] In the above embodiment, by providing the sealing ring 2 6, it can work together with the sealing ring 1 5 to play a sealing role, enhance the sealing effect, and extend the service life of the water pump; by providing the sealing ring 2 6, the sealing ring 2 6 is always in a state of being compressed by the shaft sleeve. Even if the sealing ring 1 5 fails due to the loosening of the nut 9, the sealing ring 2 6 can still ensure the sealing of the shaft sleeve.
[0016] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.
Claims
1. A water pump shaft sleeve sealing device, comprising a pump shaft (1), wherein an impeller (2), two packing seal sleeves (4), and two water retaining sleeves (3) are mounted on the pump shaft (1); the packing seal sleeve (4) is located outside the impeller (2), and the water retaining sleeve (3) is located outside the packing seal sleeve (4); a sealing ring (5) is provided between the impeller (2) and the packing seal sleeve (4) and between the water retaining sleeve (3) and the packing seal sleeve (4); the device is characterized in that: A second sealing ring (6) is provided between the water retaining sleeve (3) and the stuffing sealing sleeve (4) and the pump shaft (1), and a mounting groove cooperating with the second sealing ring (6) is provided on the water retaining sleeve (3) and the stuffing sealing sleeve (4).
2. The water pump shaft sleeve sealing device according to claim 1, characterized in that: Two bearings (7) are mounted on the pump shaft (1); the bearings (7) are located outside the water retaining sleeve (3); and an elastic retaining ring (8) and a nut (9) for limiting are mounted on the pump shaft (1); the elastic retaining ring (8) and the nut (9) are respectively located outside the bearings (7).
3. The water pump shaft sleeve sealing device according to claim 1, characterized in that: One end of the pump shaft (1) is connected to a coupling via a key (10).