Magnetic leakage blocking device
The magnetic leak preventer, through its multi-layered protection design consisting of a stationary ring fixing seat, a dynamic ring sealing ring, and a stationary ring sealing ring, solves the problem of poor sealing of traditional oil seals under high-speed rotation and equipment vibration, thus achieving the effect of preventing oil leakage and shaft wear.
Patent Information
- Application Number
- CN202520371818.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-05
- Publication Date
- 2026-01-02
- Estimated Expiration
- 2035-03-05
AI Technical Summary
Traditional oil seal structures are prone to wear and leakage under high-speed rotation, and their sealing effect is poor when the equipment vibrates.
The magnetic leak preventer prevents oil leakage and maintains a sealing effect when the equipment vibrates through a multi-layer protection design consisting of a stationary ring fixing seat, a dynamic ring sealing ring, a stationary ring sealing ring, and a retaining ring assembly.
It effectively prevents shaft wear and lubricant leakage, ensuring that the sealing effect is not affected by equipment vibration and shaft axial displacement.
Smart Images
Figure CN223754641U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to magnetic force oil seal technical field, especially relates to a magnetic force leakage preventer. BACKGROUND
[0002] Oil seal is the mechanical element for sealing grease (oil is the most common liquid substance in the transmission system, also refers to the general liquid substance), it separates the parts needing lubrication in the transmission part from the output part, so as to prevent oil leakage. The traditional oil seal structure mostly cannot play a relatively qualified sealing effect, and has the following problems: one, contact wear: the rubber lip directly contacts with the rotating shaft, and long-term friction leads to lip aging, cracking and sealing failure; two, poor adaptability at high speed: the oil film stability is insufficient at high speed, and lubricating oil leakage is prone to occur; three, the retaining ring is fixedly installed on the static ring fixed seat and is used for limiting the static ring, when the equipment vibrates or the shaft is axially offset, the dynamic ring and the static ring move towards the side of the retaining ring, due to the fixed connection of the retaining ring, the movement of the dynamic ring and the static ring is blocked by the annular retaining piece, the dynamic ring and the static ring extrude the annular retaining piece, shape is generated, and thus the sealing element leaks, therefore, a magnetic force leakage preventer is urgently needed, which can prevent shaft wear and avoid lubricating oil leakage. SUMMARY
[0003] The utility model wants to solve the technical problem: provide a magnetic force leakage preventer, can prevent shaft wear, also avoid lubricating oil leakage.
[0004] In order to solve the above technical problem, the utility model adopts the technical scheme:
[0005] The static ring fixed seat is provided with a first annular groove on the outer side, and a static ring seat sealing ring matched with the gland is arranged in the first annular groove;
[0006] The dynamic ring body is rotatably connected in the static ring fixed seat, the inner side of the dynamic ring body is provided with a second annular groove, and a dynamic ring sealing ring is arranged in the second annular groove; the dynamic ring sealing ring is tightly clamped around the shaft by interference fit;
[0007] The permanent magnet is connected to the end face of the dynamic ring;
[0008] The static ring body is connected to the end face of the dynamic ring body through the permanent magnet, so that the end face of the dynamic ring body and the end face of the static ring body are attached, the outer side of the static ring body is provided with a third annular groove, and a static ring sealing ring matched with the static ring fixed seat by interference fit is arranged in the third annular groove;
[0009] The retaining ring assembly is movably connected to the upper side of the static ring fixed seat close to the static ring body along the axial direction, and one side of the retaining ring assembly abuts on the end face of the static ring body away from the dynamic ring.
[0010] Further, the blocking ring assembly comprises springs, an annular blocking piece, and a fourth annular groove is arranged on one side of the static ring fixing seat close to the static ring body, and a plurality of springs are connected to the fourth annular groove, and the axial direction of the springs is parallel to the axial direction of the rotating shaft, and one side of the annular blocking piece is connected to one end of the spring away from the annular groove.
[0011] Further, the plurality of springs are distributed in the annular groove in a circumferential array along the axial direction of the rotating shaft.
[0012] Further, a friction pair is arranged between the dynamic ring body and the static ring body, and the material of the friction pair is carbon fiber.
[0013] Further, one side of the annular blocking piece facing the static ring body is provided with an annular protrusion matched with the gap between the inner layer of the static ring fixing seat and the outer side of the static ring body.
[0014] The beneficial effects of the utility model lie in that, compared with the prior art, through the cooperation of the static ring fixing seat sealing ring, the dynamic ring sealing ring and the static ring sealing ring and the blocking ring assembly, not only can multi-layer protection be formed to prevent oil leakage and external material intrusion, but also can ensure that the dynamic ring and the static ring do not deform when the equipment vibrates or the rotating shaft axially deviates, and the sealing effect is ensured. BRIEF DESCRIPTION OF DRAWINGS
[0015] Figure 1 It is a structural schematic view of a magnetic leakage blocking device of the embodiment of the utility model;
[0016] Figure 2 It is an A part enlarged view of Figure 1
[0017] Figure 3 It is a B part enlarged view of Figure 1
[0018] REFERENCE SIGNS
[0019] 1, static ring fixing seat; 11, first annular groove; 111, static ring seat sealing ring; 12, fourth annular groove
[0020] 2, dynamic ring body; 21, second annular groove; 211, dynamic ring sealing ring;
[0021] 3, rotating shaft;
[0022] 4, permanent magnet;
[0023] 5, static ring body; 51, third annular groove; 511, static ring sealing ring;
[0024] 6, blocking ring assembly; 61, spring; 62, annular blocking piece; 621, annular protrusion;
[0025] 7, friction pair;
[0026] 8. The gland. DETAILED DESCRIPTION
[0027] In order to explain the technical content, the purposes and effects of the present application in detail, the following will be described in combination with the embodiments and the accompanying drawings.
[0028] Please refer to Figures 1 to 3 A magnetic leakage blocking device, comprising:
[0029] A static ring fixing seat 1, an outer side of the static ring fixing seat 1 is provided with a first annular groove 11, and a static ring seat sealing ring 111 matched with a gland 8 is arranged in the first annular groove;
[0030] A dynamic ring body 2, the dynamic ring body 2 is rotatably connected in the static ring fixing seat 1, an inner side of the dynamic ring body 2 is provided with a second annular groove 21, and a dynamic ring sealing ring 211 is arranged in the second annular groove 21, the dynamic ring sealing ring 211 is tightly held on a rotating shaft 3 through interference fit;
[0031] A permanent magnet 4, the permanent magnet 4 is connected to an end face of the dynamic ring;
[0032] A static ring body 5, the static ring body 5 is connected to an end face of the dynamic ring body 2 through the permanent magnet 4, so that the end face of the dynamic ring body 2 and the end face of the static ring body 5 are attached, an outer side of the static ring body 5 is provided with a third annular groove 51, and a static ring sealing ring 511 matched with the static ring fixing seat 1 through interference fit is arranged in the third annular groove 51;
[0033] A blocking ring assembly 6, the blocking ring assembly 6 is movably connected to an upper side of the static ring fixing seat 1 near the static ring body 5, and one side of the blocking ring assembly 6 abuts against an end face of the static ring body 5 away from the dynamic ring.
[0034] In the above embodiment, the static ring fixing seat 1 is matched with the gland 8 through the static ring seat sealing ring 111, so that the static ring seat sealing ring 111 can isolate the external environment and the lubricating oil cavity, prevent the medium from leaking out, then the dynamic ring sealing ring 211 is matched with the rotating shaft 3 through interference fit, the axial vibration is compensated, the static ring sealing ring 511 is used to prevent the leakage of the side of the static ring fixing seat 1 near the static ring body 5, when the equipment vibrates or the rotating shaft 3 axially deviates, the dynamic ring body 2 and the static ring body 5 move towards the blocking ring side, the blocking ring assembly 6 can move along the axial direction, so that the static ring body 5 always abuts against the blocking ring assembly 6, so that the shape does not change, compared with the prior art, through the cooperation of the static ring seat sealing ring 111, the dynamic ring sealing ring 211 and the static ring sealing ring 511 and the blocking ring assembly 6, not only can form multi-layer protection to prevent oil leakage and external material intrusion, but also can ensure that the dynamic ring body 2 and the static ring body 5 do not deform when the equipment vibrates or the rotating shaft 3 axially deviates, and the sealing effect is ensured.
[0035] As an optional implementation, the blocking ring assembly 6 comprises springs 61, annular blocking pieces 62, the static ring fixing seat 1 is provided with a fourth annular groove 12 near one side of the static ring body 5, and the springs 61 are connected to the fourth annular groove 12; the axial direction of the springs 61 is parallel to the axial direction of the rotating shaft 3; and one side of the annular blocking piece 62 is connected to one end of the spring 61 far away from the annular groove.
[0036] In the above implementation, the springs 61 are contracted when the moving ring body 2 and the static ring body 5 move towards the annular assembly, so that the annular blocking piece 62 is always abutted against the static ring body 5, and the shape of the moving ring and the static ring is ensured.
[0037] As an optional implementation, the springs 61 are distributed in a circumferential array in the axial direction of the rotating shaft 3 in the fourth annular groove 12.
[0038] In the above implementation, when the moving ring body 2 and the static ring body 5 press the annular blocking piece 62, the force received by the annular blocking piece 62 is balanced, so that the annular blocking piece 62 does not deviate in the axial direction.
[0039] As an optional implementation, the moving ring body 2 and the static ring body 5 are provided with a friction pair 7, and the material of the friction pair 7 is carbon fiber.
[0040] As an optional implementation, the side of the annular blocking piece 62 facing the static ring body 5 is provided with an annular protrusion 621 matched with the gap between the inner layer of the static ring fixing seat 1 and the outer side of the static ring body 5.
[0041] In the above implementation, the annular protrusion 621 can further block the entry of external substances from the gap between the annular blocking piece 62 and the end surface of the static ring body 5.
[0042] The above only describes the embodiments of the utility model, and does not limit the patent range of the utility model, and any equivalent transformation or direct or indirect application in the related technical field based on the contents of the utility model specification and drawings is also included in the patent protection range of the utility model.
Claims
1. A magnetic leak-proof device, characterized in that, include: A stationary ring fixing seat has a first annular groove on its outer side, and a stationary ring sealing ring that fits with a pressure cap is provided in the first annular groove. The rotating ring body is rotatably connected to the stationary ring fixing seat. The inner side of the rotating ring body is provided with a second annular groove, and the rotating ring sealing ring is provided in the second annular groove. The rotating ring sealing ring is interference-fitted to hold the rotating shaft. A permanent magnet is attached to the end face of the moving ring. The stationary ring body is connected to the end face of the moving ring body through a permanent magnet, so that the end face of the moving ring body and the end face of the stationary ring body fit together. The outer side of the stationary ring body is provided with a third annular groove, and the stationary ring sealing ring is provided in the third annular groove with an interference fit with the stationary ring fixing seat. The retaining ring assembly is axially movable and connected above the stationary ring fixing seat on the side near the stationary ring body. One side of the retaining ring assembly abuts against the end face of the stationary ring body on the side away from the moving ring.
2. The magnetic leak detector according to claim 1, characterized in that, The retaining ring assembly includes a spring, an annular retaining plate, and a stationary ring fixing seat with a fourth annular groove on the side near the stationary ring. Several springs are connected to the fourth annular groove, with the axial direction of the springs parallel to the axial direction of the rotating shaft. One side of the annular retaining plate is connected to the end of the spring away from the annular groove.
3. The magnetic leak detector according to claim 2, characterized in that, Several springs are arranged in a circular array around the axis of rotation within an annular groove.
4. The magnetic leak detector according to claim 1, characterized in that, There is a friction pair between the moving ring body and the stationary ring body, and the material of the friction pair is carbon fiber.
5. The magnetic leak detector according to claim 2, characterized in that, The annular baffle has an annular protrusion on the side facing the stationary ring body that mates with the gap between the inner layer of the stationary ring fixing seat and the outer side of the stationary ring body.