Mechanical sealing structure for preventing rotor shaft from being abraded
By adding a bushing and sealing ring between the rotating ring and the rotor shaft, rotor shaft wear is prevented, solving the wear problem caused by relative sliding between the rotating ring and the rotor shaft in the canned motor pump, and achieving a low-cost and fast maintenance solution.
Patent Information
- Application Number
- CN202520613830.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-02
- Publication Date
- 2026-02-13
- Estimated Expiration
- 2035-04-02
AI Technical Summary
During use, the mechanical seal of existing canned motor pumps experiences relative sliding between the rotating ring and the rotor shaft, leading to wear of the rotor shaft by the O-ring or V-ring, resulting in media leakage and high maintenance costs and time.
A bushing is added between the rotating ring and the rotor shaft, and a sealing ring is installed between the bushing and the rotating ring to prevent the rotating ring from directly contacting the rotor shaft. Only the bushing is worn, not the rotor shaft. An O-ring is installed in the space formed by the bushing and the retaining sleeve to ensure sealing.
It reduces maintenance costs and time; simply replacing the bushing solves the wear problem and maintains the sealing effect.
Smart Images
Figure CN223908464U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of shielding pump, concretely relates to a mechanical seal structure for preventing rotor shaft abrasion. BACKGROUND
[0002] With the more and more wide use of shielding pumps, the after-sales demand of users is also rising, and the shielding pump products not only need to be good, but also need to be maintained to the greatest extent, and the cost of after-sales maintenance is reduced. Figure 1 As shown, the mechanical seal needs to be in direct contact with the rotor shaft under normal circumstances, and the O-ring (or V-ring) is used for sealing between the dynamic ring and the rotor shaft, when the shielding pump is started, the dynamic ring and the rotor shaft will rotate synchronously, but as the use time is longer and longer, the dynamic ring of the mechanical seal may be loose, at this time, the O-ring (or V-ring) of the dynamic ring will slide relative to the rotor shaft, and the abnormal relative sliding will cause the O-ring (or V-ring) to be abraded on the rotor shaft to form a ring-shaped groove, thereby causing a large amount of leakage of the medium, and finally causing damage to the shielding pump. This kind of fault usually needs to replace the worn parts during maintenance, because the shielding pump rotor and the shaft are of an integrated structure, so if the rotor shaft is replaced, the entire rotor must be replaced, which is high in maintenance cost and long in time. CONTENT OF THE UTILITY MODEL
[0003] The utility model aims at overcoming the above-mentioned insufficient problem, and provides a mechanical seal structure for preventing rotor shaft abrasion.
[0004] The utility model adopts the technical scheme that:
[0005] A mechanical seal structure for preventing rotor shaft abrasion, comprising a rotor shaft, a bushing is sleeved on the rotor shaft, a mechanical seal is sleeved on the bushing, the mechanical seal comprises a static ring and a dynamic ring which are sleeved on the bushing in sequence along the axial direction, a sealing ring is installed between the dynamic ring and the bushing, an end face of the bushing on the side of the dynamic ring is provided with a retaining sleeve, the retaining sleeve is sleeved on the rotor shaft, and an O-ring I is installed between the bushing and the retaining sleeve.
[0006] An inner chamfer is processed on the end face of the bushing on the side of the dynamic ring, and the O-ring I is arranged in a space formed by the inner chamfer of the bushing, the rotor shaft and the retaining sleeve.
[0007] The sealing ring is an O-ring or a V-ring.
[0008] The utility model has the characteristics that: the bushing is added between the dynamic ring and the rotor shaft, the mechanical seal is prevented from being in direct contact with the rotor shaft, when the dynamic ring of the mechanical seal abnormally slides, only the bushing is abraded, the rotor shaft is not abraded, only the bushing needs to be replaced during maintenance, and the maintenance cost and the maintenance time are greatly reduced. BRIEF DESCRIPTION OF DRAWINGS
[0009] Figure 1 is a schematic diagram of the prior mechanical seal structure.
[0010] Figure 2 is a schematic diagram of the structure of the present application.
[0011] Figure 3 is Figure 2 a partial A enlarged view.
[0012] Wherein: 1, rotor shaft; 2, bushing; 3, static ring; 4, dynamic ring; 5, sealing ring; 6, baffle sleeve; 7, O-ring; 8, inner chamfer. DETAILED DESCRIPTION
[0013] As Figure 2 , 3 shown, the utility model is a kind of mechanical seal structure to prevent rotor shaft abrasion, including rotor shaft 1, the rotor shaft 1 is sleeved with bushing 2, the bushing 2 is sleeved with mechanical seal, the mechanical seal includes static ring 3, dynamic ring 4, which are sequentially sleeved on bushing 2 along the axis direction, increase a bushing 2 between dynamic ring 4 and rotor shaft 1, prevent mechanical seal and rotor shaft 1 direct contact, sealing ring 5 is installed between dynamic ring 4 and bushing 2, the sealing ring 5 is O-ring or V-ring, mechanical seal and bushing 2 are sealed by sealing ring 5, the end face of the side of dynamic ring 4 of bushing 2 is provided with baffle sleeve 6, the baffle sleeve 6 is sleeved on rotor shaft 1, the end face of the side of dynamic ring 4 of bushing 2 is turned with inner chamfer 8, O-ring one 7 is installed in the space formed by inner chamfer 8 of bushing 2, rotor shaft 1 and baffle sleeve 6, the sealing property between bushing 2 and rotor shaft 1 is guaranteed by bushing extrusion O-ring one 7, the sealing property between O-ring one 7 and baffle sleeve 6 is also guaranteed, the original sealing effect is achieved, and top screw or the compression force of front and rear matching parts can be increased on the bushing 2 to ensure the firmness between bushing 2 and rotor shaft 1.
[0014] The utility model structure when using, if the dynamic ring 4 of mechanical seal occurs abnormal relative sliding, only wear bushing 2, do not wear rotor shaft 1, only need to replace bushing 2 when maintaining, greatly reduce maintenance cost and maintenance length.
[0015] The above is only the preferred specific embodiment of the utility model, but the protection scope of the utility model is not limited to this, any skilled person in the art in the technical range disclosed by the utility model, according to the technical scheme and the inventive concept of the utility model, equivalent replacement or change, should be covered in the protection scope of the utility model.
Claims
1. A mechanical seal structure for preventing wear of a rotor shaft, characterized by: The mechanical seal comprises a rotor shaft, a bushing sleeved on the rotor shaft, and a mechanical seal sleeved on the bushing, wherein the mechanical seal comprises a static ring and a dynamic ring which are sleeved on the bushing in sequence along the axial direction, a sealing ring is arranged between the dynamic ring and the bushing, an end face of the bushing on the side of the dynamic ring is provided with a baffle sleeve, the baffle sleeve is sleeved on the rotor shaft, and an O-ring is arranged between the bushing and the baffle sleeve.
2. A mechanical seal structure for preventing wear of a rotor shaft according to claim 1, characterized in that: An inner chamfer is formed on the end face of the bushing on the side of the dynamic ring, and the O-ring is arranged in a space formed by the inner chamfer, the rotor shaft and the baffle sleeve.
3. A mechanical seal structure for preventing wear of a rotor shaft according to claim 1, characterized in that: The sealing ring is an O-ring or a V-ring.