Centrifugal pump capable of reducing leakage rate based on wear ring gap
By designing a stepped port ring structure in a centrifugal pump, the problems of increased leakage volume and reduced equipment operation efficiency due to wear of the port ring gap are solved, and higher equipment life and use efficiency are achieved, and power consumption and operating costs are reduced.
Patent Information
- Application Number
- CN202421796607.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-29
- Publication Date
- 2025-06-03
- Estimated Expiration
- 2034-07-29
AI Technical Summary
During the operation of existing centrifugal pumps, due to the wear of the port ring gap, the leakage amount increases, resulting in reduced pump transportation efficiency and increased energy consumption, and may lead to bearing damage and seal leakage, which will affect the long-term operation and safety of the equipment.
A centrifugal pump based on step-type port ring is designed. By replacing the front port ring of the impeller, the pump port ring one, the rear port ring and the pump port ring two, it reduces leakage and avoids eccentricity.
The design effectively improves the life and efficiency of the pump, reduces the problem of power consumption in the factory, and reduces equipment damage and operating costs due to leakage and vibration.
Smart Images
Figure CN222936967U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of centrifugal pumps, in particular to a centrifugal pump based on reducing leakage through the wearing ring clearance. Background Art
[0002] During the operation of a centrifugal pump, the clearances at various parts are very important. In particular, the wearing ring clearance plays a significant role in the performance and efficiency of the pump. When the equipment is running, the clearances at various parts are continuously worn and increased, and the leakage of the pump will also increase, resulting in a decrease in the transportation efficiency of the pump, an increase in energy consumption. At the same time, the vibration of the pump will also increase accordingly. Seriously, it will lead to bearing damage and seal leakage, and ultimately cause equipment failure.
[0003] In the prior art, in order to ensure the safe operation of the equipment, it is necessary to stop the machine for maintenance and replace the worn parts in time at the initial stage when vibration and efficiency abnormalities are found. Although this way of replacing worn parts can ensure the safety of the equipment, frequent replacement of vulnerable parts cannot meet the requirements of long-term operation, and the operation cost will also increase greatly. Therefore, the technical field of this invention proposes a centrifugal pump based on reducing leakage through the wearing ring clearance to solve the above problems. Summary of the Utility Model
[0004] To make up for the above deficiencies, the utility model provides a centrifugal pump based on reducing leakage through the wearing ring clearance, aiming to improve the problems in the prior art that the machine is stopped for maintenance and the worn parts are replaced relatively frequently and it is difficult to meet the requirements of long-term operation, and the operation cost will also increase greatly.
[0005] To achieve the above object, the utility model provides the following technical solutions: A centrifugal pump based on reducing leakage through the wearing ring clearance, including a pump body, a pump cover is arranged outside the pump body, an inner cavity is arranged inside the pump body, a first annular groove is opened outside the inner cavity, and an impeller front wearing ring is sleeved outside the first annular groove. A pump wearing ring one is sleeved inside the pump body. A second annular groove is opened on one side of the inner cavity, and an impeller rear wearing ring is sleeved outside the second annular groove. A pump wearing ring two is sleeved inside the pump cover.
[0006] Further, the outer side of the impeller front wearing ring is attached to the outer side of the pump wearing ring one, and the outer side of the impeller rear wearing ring is attached to the outer side of the pump wearing ring two.
[0007] Further, a mechanical seal is fixedly connected to the outside of the pump cover, and a bearing bracket is fixedly connected to the outside of the pump cover.
[0008] Further, a rotating shaft is rotatably connected inside the bearing bracket, and the outer side of the rotating shaft is rotatably connected to the inner side of the inner cavity.
[0009] Further, a front seal ring leakage area is provided between one side of the inner cavity body and the inner side of the pump body.
[0010] Further, a rear seal ring leakage area is provided between the outer side of the pump cover and the outer side of the inner cavity body.
[0011] The utility model has the following beneficial effects:
[0012] 1. In the utility model, by replacing the front impeller seal ring, the first pump seal ring, the rear impeller seal ring and the second pump seal ring with a stepped design, it is possible to avoid the phenomenon of shaft seizure caused by an increase in leakage or eccentricity, etc., which can further improve the service life and operating efficiency of the pump, and can reduce the power consumption of the factory. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 is a sectional view of a centrifugal pump based on reducing leakage by seal ring clearance proposed by the utility model;
[0014] Figure 2 is a schematic structural view of the pump cover of a centrifugal pump based on reducing leakage by seal ring clearance proposed by the utility model;
[0015] Figure 3 is Figure 1 the enlarged view of part A in
[0016] Figure 4 is Figure 1 the enlarged view of part B in
[0017] Figure 5 is Figure 2 the enlarged view of part C in
[0018] Figure 6 is Figure 2 the enlarged view of part D in
[0019] Legend:
[0020] 1. Pump body; 2. Pump cover; 3. Front impeller seal ring; 4. First pump seal ring; 5. Rear impeller seal ring; 6. Second pump seal ring; 7. Mechanical seal; 8. Bearing bracket; 9. Shaft; 10. Front seal ring leakage area; 11. Rear seal ring leakage area; 12. Inner cavity body. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.
[0022] Reference Figures 1 - 3 , an embodiment provided by the utility model: a centrifugal pump based on reducing leakage through the impeller shroud clearance, comprising a pump body 1, a pump cover 2 is arranged outside the pump body 1, an inner cavity 12 is arranged inside the pump body 1, a first annular groove is formed outside the inner cavity 12, and an impeller front shroud 3 is sleeved outside the first annular groove. A first pump shroud 4 is sleeved inside the pump body 1. A second annular groove is formed on one side of the inner cavity 12, and an impeller rear shroud 5 is sleeved outside the second annular groove. A second pump shroud 6 is sleeved inside the inner side of the pump cover 2. The outer side of the impeller front shroud 3 is attached to the outer side of the first pump shroud 4, and the outer side of the impeller rear shroud 5 is attached to the outer side of the second pump shroud 6. A mechanical seal 7 is fixedly connected to the outside of the pump cover 2, a bearing bracket 8 is fixedly connected to the outside of the pump cover 2, a rotating shaft 9 is rotatably connected inside the bearing bracket 8, the outer side of the rotating shaft 9 is rotatably connected to the inner side of the inner cavity 12, a front shroud leakage area 10 is arranged between one side of the inner cavity 12 and the inner side of the pump body 1, and a rear shroud leakage area 11 is arranged between the outside of the pump cover 2 and the outside of the inner cavity 12. Replace the impeller front shroud 3, the first pump shroud 4, the impeller rear shroud 5 and the second pump shroud 6 with Figure 5 and Figure 6 The stepped design shown in can avoid the phenomenon of the rotating shaft 9 being jammed or seized due to increased leakage or eccentricity, etc., can further improve the service life and use efficiency of the pump, and can reduce the problem of power consumption in the factory.
[0023] Working principle: In the prior art, the impeller front shroud 3 is assembled inside the first annular groove of the inner cavity 12, and the first pump shroud 4 is assembled inside the pump body 1. The two cooperate to increase the sealing performance. Moreover, the impeller rear shroud 5 is assembled inside the second annular groove of the inner cavity 12, and the second pump shroud 6 is assembled inside the inner side of the pump cover 2. The two cooperate to seal the other side inside the pump body 1. The traditional sealing rings are in a parallel structure and cooperate with each other. After a long time of cooperation, a large gap will appear, resulting in a front shroud leakage area 10 and a rear shroud leakage area 11 at two positions inside the pump body 1. Replace the impeller front shroud 3, the first pump shroud 4, the impeller rear shroud 5 and the second pump shroud 6 with Figure 5 and Figure 6 The stepped design shown in can avoid the phenomenon of the rotating shaft 9 being jammed or seized due to increased leakage or eccentricity, etc., can further improve the service life and use efficiency of the pump, and can reduce the problem of power consumption in the factory.
[0024] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.
Claims
1. A centrifugal pump for reducing leakage based on a ring gap, comprising a pump body (1), characterized in that: The pump body (1) is provided with a pump cover (2) on the outside, the pump body (1) is provided with an inner cavity (12) inside, the inner cavity (12) is provided with a first annular groove on the outside, and an impeller front mouth ring (3) is sleeved on the outside of the first annular groove, a pump mouth ring 1 (4) is sleeved inside the pump body (1), a second annular groove is provided on one side of the inner cavity (12), and an impeller rear mouth ring (5) is sleeved on the outside of the second annular groove, and a pump mouth ring 2 (6) is sleeved on the inside of the pump cover (2).
2. A centrifugal pump based on reducing leakage based on the mouth ring gap according to claim 1, characterized in that: The outer side of the impeller front ring (3) is in contact with the outer side of the pump ring 1 (4), and the outer side of the impeller rear ring (5) is in contact with the outer side of the pump ring 2 (6).
3. A centrifugal pump based on reducing leakage based on the mouth ring gap according to claim 1, characterized in that: The outside of the pump cover (2) is fixedly connected to a mechanical seal (7), and the outside of the pump cover (2) is fixedly connected to a bearing bracket (8).
4. A centrifugal pump based on reducing leakage based on the mouth ring gap according to claim 3, characterized in that: The bearing support (8) is rotatably connected to a rotating shaft (9) inside, and the outer side of the rotating shaft (9) is rotatably connected to the inner side of the inner cavity (12).
5. A centrifugal pump based on reducing leakage based on the mouth ring gap according to claim 1, characterized in that: A front ring leakage area (10) is provided on one side of the inner cavity (12) and the inner side of the pump body (1).
6. A centrifugal pump based on reducing leakage based on the mouth ring gap according to claim 1, characterized in that: A rear ring leakage area (11) is provided on the outer side of the pump cover (2) and the outer side of the inner cavity (12).