Centrifugal pump sealing assembly
By adopting a double-layer structure of inner seal and outer seal in the centrifugal pump, combining the sealing dynamic ring, static ring and elastic ring, the problem of insufficient connection tightness of the existing sealing structure is solved, achieving a more efficient sealing effect and reducing the pump Risk of fluid leakage in the body.
Patent Information
- Application Number
- CN202420972552.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-07
- Publication Date
- 2024-12-24
- Estimated Expiration
- 2034-05-07
AI Technical Summary
The sealing structure of the existing centrifugal pump sealing assembly has poor connection tightness, resulting in the fluid in the pump body being easily leaked outward.
The double-layer sealing structure of inner seal and outer seal is adopted. Through the tight cooperation of the outer sealing moving ring with the impeller, inner sealing moving ring and rotating shaft, combined with the sealing elastic ring and spring, the effective sealing of fluid in the pump body is ensured.
It significantly improves the sealing effect in the centrifugal pump, reduces the risk of fluid leakage outward, and enhances the tightness of the sealing connection in the pump body.
Smart Images
Figure CN222228947U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of centrifugal pump seals, in particular to a centrifugal pump seal component. Background Art
[0002] A centrifugal pump is a pump that transports liquid by the centrifugal force generated by the rotation of the impeller. A sealing component is provided inside the centrifugal pump to prevent leakage from other parts of the centrifugal pump except the liquid outlet.
[0003] Existing centrifugal pump sealing components, such as a mechanical seal structure for a pump proposed in patent application number "CN201320850866.2", use structures such as a rubber bellows, annular grooves, a dynamic ring, a static ring, and a spring. The rubber bellows pushes the dynamic ring so that the dynamic ring fits against the static ring, thereby sealing the fluid in the pump to prevent axial leakage.
[0004] However, a sealing structure is formed by a rubber bellows, annular groove, dynamic ring, static ring and spring. The inside of the pump body is sealed only by a single sealing structure, and the connection tightness is poor. The fluid in the pump body is still easy to leak out. Therefore, a centrifugal pump sealing assembly is proposed. Utility Model Content
[0005] The purpose of the utility model is to provide a centrifugal pump sealing assembly to solve the problems raised in the above background technology.
[0006] The purpose of the utility model can be achieved through the following technical solutions:
[0007] A centrifugal pump sealing assembly comprises a pump body, a baffle is fixedly connected to one side of the pump body, a rotating shaft is rotatably connected inside the baffle, one end of the rotating shaft is located in the pump body, and an impeller is fixedly connected to the end of the rotating shaft located inside the pump body;
[0008] The inner wall of the impeller is tightly clamped with an outer sealing dynamic ring, the side of the baffle close to the pump body is tightly clamped with an outer sealing static ring, the outer sealing dynamic ring and the outer sealing static ring are tightly fitted and rotated together, the baffle and the outer sealing static ring are tightly connected with an inner sealing static ring, the side wall of the rotating shaft is tightly sleeved with an inner sealing dynamic ring, and the inner sealing dynamic ring and the inner sealing static ring are tightly fitted and rotated together.
[0009] Preferably, the center of the impeller is aligned with the center of the rotating shaft, and the centers of the outer sealing dynamic ring, the outer sealing static ring, the inner sealing static ring and the inner sealing dynamic ring are aligned and are all sleeved on the outside of the rotating shaft.
[0010] Preferably, an outer sealing ring is tightly clamped on one side of the baffle close to the impeller, an outer sealing assembly is tightly clamped between the outer sealing ring and the outer sealing static ring, the outer sealing assembly includes a sealing elastic ring, one end of the sealing elastic ring is tightly clamped to the inner wall of the outer sealing ring, and the outer sealing static ring is tightly clamped between the outer sealing ring and the sealing elastic ring.
[0011] Preferably, an outer sleeve of the sealing elastic ring is provided with an outer spring, and two ends of the outer spring are respectively in contact with two sides of the inner wall of the sealing elastic ring.
[0012] Preferably, the inner static sealing ring is tightly clamped between the baffle and the outer sealing ring, a retaining ring is fixedly connected to the side wall of the rotating shaft, an inner spring is sleeved on the side wall of the rotating shaft, one end of the inner spring is fixedly connected to the retaining ring, and the other end is abutted and matched with the outer dynamic sealing ring.
[0013] Preferably, a drive shaft is fixedly connected to the middle of one side of the impeller away from the baffle, a paddle is fixedly connected to the end of the drive shaft, blades are fixedly connected to both sides of the paddle, a liquid inlet is fixedly connected to the middle of the pump body, and the paddle is located in the liquid inlet.
[0014] Beneficial effects of the utility model:
[0015] The utility model achieves a sealing effect by closely matching the outer sealing dynamic ring with the impeller and the outer sealing static ring with the baffle. When the impeller rotates, the outer sealing dynamic ring rotates and fits tightly with the outer sealing static ring. The inner sealing static ring closely matches the outer sealing static ring and the inner sealing dynamic ring closely matches the rotating shaft. When the impeller rotates, the inner sealing dynamic ring is driven to rotate by the rotating shaft and fits tightly with the inner sealing static ring. The sealing effect is achieved by adopting a double-layer sealing method of inner and outer seals, which effectively improves the sealing effect of the internal connection of the centrifugal pump and reduces the risk of fluid in the pump body still leaking out. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings required for use in the embodiments or the prior art description are briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0017] Figure 1 It is a schematic diagram of the overall explosion structure of the utility model;
[0018] Figure 2 It is a schematic diagram of the overall structure of the utility model;
[0019] Figure 3 This is a schematic diagram of the cross-sectional structure of the centrifugal pump of the utility model;
[0020] Figure 4 This is a schematic diagram of the impeller structure of the utility model;
[0021] Figure 5 yes Figure 3 A schematic diagram of the structure at A;
[0022] Figure 6 yes Figure 4 A schematic diagram of the structure at B;
[0023] The reference numerals in the figures are as follows:
[0024] 1. Pump body; 2. Baffle; 3. Rotating shaft; 4. Impeller; 5. Liquid inlet; 6. Drive shaft; 7. Paddle; 8. Blade; 9. External sealing dynamic ring; 10. External sealing static ring; 11. Snap ring; 12. External sealing ring; 13. Internal sealing static ring; 14. Internal sealing dynamic ring; 15. Sealing elastic ring; 16. External spring; 17. Internal spring. DETAILED DESCRIPTION
[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0026] A centrifugal pump sealing assembly, such as Figure 1-Figure 6 As shown, it comprises a pump body 1, a baffle 2 is fixedly connected to one side of the pump body 1, a rotating shaft 3 is rotatably connected inside the baffle 2, one end of the rotating shaft 3 is located inside the pump body 1, and an impeller 4 is fixedly connected to the end of the rotating shaft 3 located inside the pump body 1;
[0027] The inner wall of the impeller 4 is tightly clamped with an outer sealing dynamic ring 9, and the side of the baffle 2 close to the pump body 1 is tightly clamped with an outer sealing static ring 10. The outer sealing dynamic ring 9 and the outer sealing static ring 10 are tightly fitted and rotatably cooperated. The baffle 2 and the outer sealing static ring 10 are tightly fitted and connected with an inner sealing static ring 13. The side wall of the rotating shaft 3 is tightly sleeved with an inner sealing dynamic ring 14, and the inner sealing dynamic ring 14 and the inner sealing static ring 13 are tightly fitted and rotatably cooperated.
[0028] The pump body 1 and the baffle 2 form the outer shell of the centrifugal pump. When the rotating shaft 3 is driven to rotate by an external device, the rotating shaft 3 drives the impeller 4 to rotate, and the fluid in the pump body 1 is driven to flow through the rotation of the impeller 4, and the outer sealing dynamic ring 9 is closely matched with the impeller 4, and the outer sealing static ring 10 is closely matched with the baffle 2. When the impeller 4 rotates, the outer sealing dynamic ring 9 rotates and fits tightly with the outer sealing static ring 10 to achieve a sealing effect. The inner sealing static ring 13 is closely matched with the outer sealing static ring 10, and the inner sealing dynamic ring 14 is closely matched with the rotating shaft 3. When the impeller 4 rotates, the inner sealing dynamic ring 14 is driven to rotate by the rotating shaft 3 and fits tightly with the inner sealing static ring 13 to achieve a sealing effect. The double-layer sealing method of inner seal and outer seal is adopted to effectively improve the sealing effect of the internal connection of the centrifugal pump and reduce the risk of the fluid in the pump body 1 still leaking out easily.
[0029] The center of the impeller 4 is aligned with the center of the rotating shaft 3 , and the centers of the outer sealing dynamic ring 9 , the outer sealing static ring 10 , the inner sealing static ring 13 , and the inner sealing dynamic ring 14 are aligned and are all sleeved outside the rotating shaft 3 .
[0030] like Figure 1 , Figure 3 and Figure 5 As shown, the internal structures of the pump body 1 are all centered on the rotating shaft 3, and the structures that fit each other are tightly matched.
[0031] An outer sealing ring 12 is tightly clamped on one side of the baffle 2 close to the impeller 4, and an outer sealing assembly is tightly clamped between the outer sealing ring 12 and the outer sealing static ring 10. The outer sealing assembly includes a sealing elastic ring 15, one end of the sealing elastic ring 15 is tightly clamped to the inner wall of the outer sealing ring 12, and the outer sealing static ring 10 is tightly clamped between the outer sealing ring 12 and the sealing elastic ring 15.
[0032] like Figure 5 As shown, the outer sealing static ring 10 is tightly clamped between the outer sealing ring 12 and the sealing elastic ring 15, the sealing elastic ring 15 is located between the outer sealing rings 12, and the outer sealing dynamic ring 9, the outer sealing static ring 10, the outer sealing ring 12, and the baffle 2 are tightly matched to form an outer sealing assembly.
[0033] An outer spring 16 is sleeved on the outer side of the sealing elastic ring 15 , and two ends of the outer spring 16 are respectively in contact with two sides of the inner wall of the sealing elastic ring 15 .
[0034] like Figure 5 As shown, the two ends of the outer spring 16 tightly fit the two ends of the sealing elastic ring 15 with the outer sealing ring 12 and the outer sealing static ring 10 respectively, ensuring the sealing of the two ends of the outer sealing component.
[0035] The inner static sealing ring 13 is tightly clamped between the baffle 2 and the outer sealing ring 12. The side wall of the rotating shaft 3 is fixedly connected with a retaining ring 11. The side wall of the rotating shaft 3 is sleeved with an inner spring 17. One end of the inner spring 17 is fixedly connected to the retaining ring 11, and the other end is abutted and matched with the outer dynamic sealing ring 9.
[0036] like Figure 5 As shown, the inner spring 17 squeezes the inner seal dynamic ring 14 so that one end of the inner seal dynamic ring 14 is tightly matched with the inner seal static ring 13 to form an inner seal assembly.
[0037] A driving shaft 6 is fixedly connected to the middle of the side of the impeller 4 away from the baffle 2, a paddle 7 is fixedly connected to the end of the driving shaft 6, and blades 8 are fixedly connected to both sides of the paddle 7. A liquid inlet 5 is fixedly connected to the middle of the pump body 1, and the paddle 7 is located in the liquid inlet 5.
[0038] like Figure 1-Figure 4 , Figure 6As shown, the rotation of the shaft 3 drives the impeller 4 to rotate, the impeller 4 drives the driving shaft 6 to rotate, and the driving shaft 6 drives the blade 8 on the side of the paddle to rotate. The blade 8 cuts the impurities in the liquid entering the liquid inlet 5 to prevent large impurities from entering the pump body 1 along with the fluid.
[0039] The working principle of a centrifugal pump sealing assembly provided by the utility model is as follows:
[0040] The outer sealing dynamic ring 9 is closely matched with the impeller 4, and the outer sealing static ring 10 is closely matched with the baffle 2. When the impeller 4 rotates, the outer sealing dynamic ring 9 rotates and fits tightly with the outer sealing static ring 10 to achieve a sealing effect. The inner sealing static ring 13 is closely matched with the outer sealing static ring 10, and the inner sealing dynamic ring 14 is closely matched with the rotating shaft 3. When the impeller 4 rotates, the inner sealing dynamic ring 14 is driven to rotate by the rotating shaft 3 and fits tightly with the inner sealing static ring 13 to achieve a sealing effect. The double-layer sealing method of inner and outer sealing is adopted to effectively improve the sealing effect of the internal connection of the centrifugal pump and reduce the risk of the fluid in the pump body 1 still leaking out.
[0041] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.
Claims
1. A centrifugal pump sealing assembly, comprising a pump body (1), characterized in that: A baffle (2) is fixedly connected to one side of the pump body (1), a rotating shaft (3) is rotatably connected inside the baffle (2), one end of the rotating shaft (3) is located inside the pump body (1), and an impeller (4) is fixedly connected to the end of the rotating shaft (3) located inside the pump body (1); The inner wall of the impeller (4) is tightly clamped with an outer sealing dynamic ring (9), the side of the baffle (2) close to the pump body (1) is tightly clamped with an outer sealing static ring (10), the outer sealing dynamic ring (9) and the outer sealing static ring (10) are tightly fitted and rotatably matched, the baffle (2) and the outer sealing static ring (10) are tightly fitted and connected with an inner sealing static ring (13), the side wall of the rotating shaft (3) is tightly sleeved with an inner sealing dynamic ring (14), and the inner sealing dynamic ring (14) and the inner sealing static ring (13) are tightly fitted and rotatably matched.
2. A centrifugal pump sealing assembly according to claim 1, characterized in that: The center of the impeller (4) is aligned with the center of the rotating shaft (3); the centers of the outer sealing dynamic ring (9), the outer sealing static ring (10), the inner sealing static ring (13) and the inner sealing dynamic ring (14) are aligned and are all sleeved on the outside of the rotating shaft (3).
3. A centrifugal pump sealing assembly according to claim 1, characterized in that: An outer sealing ring (12) is tightly clamped on one side of the baffle (2) close to the impeller (4), an outer sealing assembly is tightly clamped between the outer sealing ring (12) and the outer sealing static ring (10), and the outer sealing assembly comprises a sealing elastic ring (15), one end of the sealing elastic ring (15) is tightly clamped on the inner wall of the outer sealing ring (12), and the outer sealing static ring (10) is tightly clamped between the outer sealing ring (12) and the sealing elastic ring (15).
4. A centrifugal pump sealing assembly according to claim 3, characterized in that: An outer spring (16) is sleeved on the outside of the sealing elastic ring (15), and two ends of the outer spring (16) are respectively in contact with two sides of the inner wall of the sealing elastic ring (15).
5. A centrifugal pump sealing assembly according to claim 3, characterized in that: The inner static sealing ring (13) is tightly clamped between the baffle (2) and the outer sealing ring (12); a retaining ring (11) is fixedly connected to the side wall of the rotating shaft (3); an inner spring (17) is sleeved on the side wall of the rotating shaft (3); one end of the inner spring (17) is fixedly connected to the retaining ring (11), and the other end is abutted and matched with the outer dynamic sealing ring (9).
6. A centrifugal pump sealing assembly according to claim 1, characterized in that: A driving shaft (6) is fixedly connected to the middle of a side of the impeller (4) away from the baffle (2), a paddle (7) is fixedly connected to the end of the driving shaft (6), blades (8) are fixedly connected to both sides of the paddle (7), a liquid inlet (5) is fixedly connected to the middle of the pump body (1), and the paddle (7) is located inside the liquid inlet (5).