Composite type end face slotting magnetic oil seal

Abstract

The utility model discloses a composite type end face slotting magnetic oil seal which comprises a bearing box and a shaft body, the shaft body is rotationally connected to the bearing box, and the shaft body is connected with a movable ring. The bearing box is connected with a static ring; the static ring is located outside the bearing box, and the moving ring is located inside the bearing box, so that pollution caused by external dust driven and sucked in the rotating process of the moving ring is avoided; a framework oil seal is fixedly installed on the side, close to the shaft body, of the static ring, displacement of the static ring is avoided through the framework oil seal, external pollution is avoided through a dustproof lip, and oil liquid is prevented from overflowing through a sealing lip. The magnetic block is annular and is fixedly embedded into the static ring, and the magnetic block is close to the movable ring side; a gap is reserved on the side, opposite to the magnetic block, of the movable ring, so that demagnetization and magnetic block abrasion caused by heat generated by friction between the movable ring and the magnetic block are avoided; a plurality of flow guide grooves are annularly formed in the gap of the movable ring, and lubricating oil is thrown out in the radial direction through centrifugal force of the flow guide grooves.

Description

Technical Field

[0001] The utility model relates to the technical field of rotary seals, in particular to a composite end face slotted magnetic oil seal. Background Art

[0002] The oil seal is a mechanical component used to seal oil. It isolates the parts that need lubrication in the transmission components from the output components to prevent the lubricating oil from leaking.

[0003] The magnetic oil seal is composed of a static ring and a dynamic ring. It uses magnetic compensation technology to ensure that the load on the sealing end face is consistent. The dynamic and static ring joint surfaces always maintain close contact. Even under large shaft runout, it can still effectively seal, thereby reducing leakage.

[0004] However, the existing magnetic oil seals still have the following shortcomings: 1. The static ring has poor stability and is prone to movement. Dust can easily enter the gap between the static ring and the shaft, causing contamination of the internal oil. 2. The dynamic and static rings generate large amounts of heat due to wear, the magnetic suction block will wear and demagnetize, and oil accumulation at the connection between the dynamic and static rings may cause leakage. Utility Model Content

[0005] The utility model aims to provide a composite end face slotted magnetic oil seal to solve the problems raised in the above background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A composite end face slotted magnetic oil seal comprises a bearing box and a shaft body, wherein the shaft body is rotatably connected to the bearing box, and the shaft body is connected to a moving ring; the bearing box is connected to a stationary ring; a magnetic block is fixed to the stationary ring near the moving ring side, the stationary ring is located on the outside of the bearing box, and the moving ring is located on the inside of the bearing box; a skeleton oil seal is fixedly installed on the stationary ring near the shaft body side; the magnetic block is annular and fixedly embedded in the stationary ring, and the magnetic block is close to the moving ring side; a gap is left on the moving ring side relative to the magnetic block, and a plurality of guide grooves are provided along the ring at the gap of the moving ring, and a rubber lubrication pad is abutted at the connection between the stationary ring and the moving ring near the rotating shaft side.

[0008] As a further preferred embodiment of the present invention, the moving ring is abutted against a moving ring driving O-ring near the shaft body, and the stationary ring is abutted against a stationary ring driving O-ring near the bearing box, and the O-ring is used to fix the moving ring and the stationary ring.

[0009] As a further preferred embodiment of the present invention, a skeleton oil seal is fixedly installed on the static ring close to the shaft body side. The skeleton oil seal is made of rubber and is located on the static ring away from the dynamic ring side. The skeleton oil seal is C-shaped with its C-shaped opening facing the static ring side.

[0010] As a further preferred embodiment of the present invention, the skeleton oil seal includes a metal skeleton, a dust lip, a spring and a sealing lip. An L-shaped metal skeleton is provided inside the skeleton oil seal for internal support. The dust lip is located on the side of the static ring close to the shaft body and away from the side of the dynamic ring; the sealing lip is located on the side of the static ring close to the shaft body and close to the side of the dynamic ring; the dust lip and the sealing lip abut the rotating shaft; the spring is in a ring shape and surrounds the inner side of the C-shaped opening of the skeleton oil seal close to the shaft body.

[0011] It can be seen that the skeleton oil seal is provided to avoid displacement of the static ring, the dust lip is provided to avoid external pollution of the internal oil, and the sealing lip is provided to further prevent oil overflow.

[0012] As a further preferred embodiment of the present invention, the static ring is located on the outer side of the bearing box and is provided with a dust cover extending outward to prevent external dust from contaminating the internal oil.

[0013] Compared with the prior art, the utility model has the following beneficial effects: 1. The static ring is located outside the bearing box, and the dynamic ring is located inside the bearing box, so as to avoid the dynamic ring from attracting external dust and causing pollution during its rotation;

[0014] 2. The stationary ring is fixedly installed with a skeleton oil seal near the shaft body, so as to prevent the stationary ring from displacement, and to prevent the external environment from polluting the internal oil by setting the dustproof lip, and to further prevent the oil from overflowing by setting the sealing lip;

[0015] 3. The magnetic block is annular and fixedly embedded in the static ring, and the magnetic block is close to the dynamic ring side; a gap is left on the dynamic ring relative to the magnetic block position side, and a gap is left on the magnetic block position side to avoid heat generated by friction between the dynamic ring and the magnetic block, which leads to demagnetization and wear of the magnetic block; a plurality of guide grooves are opened along the ring at the gap of the dynamic ring, and the lubricating oil is thrown out radially through the guide grooves by centrifugal force, reducing the risk of oil leakage on the end face; a rubber lubrication pad is abutted against the static ring near the rotating shaft side and the dynamic ring connection, and the friction between the dynamic and static rings is reduced by the setting of the rubber pad. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art.

[0017] Figure 1 Schematic diagram of the structure of the composite end face slotted magnetic oil seal of this embodiment.

[0018] Figure 2 for Figure 1 Enlarged view of point A.

[0019] Figure 3It is a three-dimensional diagram of the skeleton oil seal in the composite end face slotted magnetic oil seal of this embodiment.

[0020] Figure 4 It is a three-dimensional diagram of the dynamic ring in the composite end face slotted magnetic oil seal of this embodiment.

[0021] Figure 5 It is a three-dimensional diagram of the static ring in the composite end face slotted magnetic oil seal of this embodiment.

[0022] In the figure: 1. dynamic ring; 2. static ring; 3. magnetic block; 4. dynamic ring drive O-ring; 5. static ring drive O-ring; 6. skeleton oil seal; 101. guide groove; 102. rubber lubrication pad; 501. dust cover; 601. metal skeleton; 602. dust lip; 603. spring; 604. sealing lip; 7. bearing box; 8. shaft body. DETAILED DESCRIPTION

[0023] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0024] See also Figure 1 , Figure 4 and Figure 5 A composite end face slotted magnetic oil seal, comprising a bearing box 7 and a shaft 8, wherein the shaft 8 is rotatably connected to the bearing box 7, a moving ring 1 is abutted against a moving ring driving o-ring 4 on the side close to the shaft 8, and a stationary ring 2 is abutted against a stationary ring driving o-ring 5 on the side close to the bearing box 7, and the o-ring is used to fix the moving ring 1 and the stationary ring 2, a magnetic block 3 is fixed on the stationary ring 2 on the side close to the moving ring 1, the stationary ring 2 is located on the outside of the bearing box 7, and the moving ring 1 is located on the inside of the bearing box 7, and a rubber lubrication pad 102 is abutted against the connection between the stationary ring 2 and the moving ring 1 on the side close to the rotating shaft The friction between the dynamic and static rings 2 is reduced by setting the rubber pad; the static ring 2 is fixedly installed with a skeleton oil seal 6 near the shaft body 8; the magnetic block 3 is annular and fixedly embedded in the static ring 2, and the magnetic block 3 is close to the dynamic ring 1; a gap is left on the side of the dynamic ring 1 relative to the magnetic block 3, and a plurality of guide grooves 101 are annularly provided at the gap of the dynamic ring 1; a rubber lubrication pad 102 is abutted at the connection between the static ring 2 and the dynamic ring 1 near the rotating shaft side; the static ring 2 is provided with a dust cover 501 extending outward on the outside of the bearing box 7 to prevent external dust from contaminating the internal oil.

[0025] like Figure 2 and Figure 3As shown, in the embodiment of the utility model, a skeleton oil seal 6 is fixedly installed on the side of the static ring 2 close to the shaft body 8. The skeleton oil seal 6 is made of rubber and is located on the side of the static ring 2 away from the dynamic ring 1. The skeleton oil seal is C-shaped, and its C-shaped opening faces the side of the static ring 2; the skeleton oil seal 6 includes a metal skeleton 601, a dustproof lip 602, a spring 603 and a sealing lip 604. An L-shaped metal skeleton 601 is provided inside the skeleton oil seal 6 for internal support; the dustproof lip 602 is located on the side of the static ring 2 close to the shaft body 8 away from the dynamic ring 1; the sealing lip 604 is located on the side of the static ring 2 close to the shaft body 8 and close to the dynamic ring 1; the dustproof lip 602 and the sealing lip 604 abut the rotating shaft; the spring 603 is annular, surrounding the inner side of the C-shaped opening of the skeleton oil seal 6 close to the shaft body 8.

[0026] During the operation of the present invention, the skeleton oil seal 6 is provided to prevent the static ring 2 from being displaced, the dustproof lip 602 is provided to prevent the external environment from polluting the internal oil, and the sealing lip 604 is provided to further prevent the oil from overflowing.

[0027] The working principle of the utility model is as follows: the static ring 2 is located outside the bearing box 7, and the dynamic ring 1 is located inside the bearing box 7, so as to avoid the dynamic ring 1 from attracting external dust and causing pollution during its rotation;

[0028] The stationary ring 2 is fixedly installed with a skeleton oil seal 6 near the shaft 8, and the skeleton oil seal 6 is provided to prevent the stationary ring 2 from displacement, and the dust lip 602 is provided to prevent the external environment from polluting the internal oil, and the sealing lip 604 is provided to further prevent the oil from overflowing; the magnetic block 3 is annular and fixedly embedded in the stationary ring 2, and the magnetic block 3 is close to the moving ring 1; the moving ring 1 has a gap on the side of the magnetic block 3, and the gap is provided on the side of the magnetic block 3 to prevent the moving ring 1 from generating heat due to friction with the magnetic block 3, resulting in demagnetization and wear of the magnetic block 3;

[0029] A plurality of guide grooves 101 are provided in a ring shape at the gap of the moving ring 1. When the moving ring 1 rotates, the lubricating oil is thrown out radially through the guide grooves 101 by utilizing centrifugal force, thereby reducing the risk of oil leakage on the end surface.

[0030] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A composite end face slotted magnetic oil seal, comprising a bearing box and a shaft body, wherein the shaft body is rotatably connected to the bearing box, the shaft body is connected to a moving ring; the bearing box is connected to a stationary ring; a magnetic block is fixed to the stationary ring near the moving ring, characterized in that: The stationary ring is located on the outside of the bearing box, and the moving ring is located on the inside of the bearing box; a skeleton oil seal is fixedly installed on the stationary ring near the shaft body; the magnetic block is annular and fixedly embedded in the stationary ring, and the magnetic block is close to the moving ring; a gap is left on the moving ring relative to the magnetic block, and a plurality of guide grooves are arranged along the ring at the gap of the moving ring, and a rubber lubrication pad is abutted at the connection between the stationary ring and the moving ring near the rotating shaft.

2. The composite end face slotted magnetic oil seal according to claim 1, characterized in that: The side of the moving ring close to the shaft body is in contact with a moving ring driving O-ring, and the side of the stationary ring close to the bearing box is in contact with a stationary ring driving O-ring.

3. The composite end face slotted magnetic oil seal according to claim 1, characterized in that: The skeleton oil seal is made of rubber and is located on the side of the static ring away from the dynamic ring. The skeleton oil seal is C-shaped, and its C-shaped opening faces the static ring side.

4. The composite end face slotted magnetic oil seal according to claim 3 is characterized in that: The skeleton oil seal includes a metal skeleton, a dust lip, a spring and a sealing lip. An L-shaped metal skeleton is arranged inside the skeleton oil seal; the dust lip is located on the side of the static ring close to the shaft body and away from the side of the dynamic ring; the sealing lip is located on the side of the static ring close to the shaft body and close to the side of the dynamic ring; the dust lip and the sealing lip abut against the rotating shaft; the spring is in a ring shape and surrounds the inner side of the C-shaped opening of the skeleton oil seal close to the shaft body.

5. The composite end face slotted magnetic oil seal according to claim 1, characterized in that: The stationary ring is located on the outer side of the bearing box and is provided with a dust cover extending outward.

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