CN213929201U - Magnetic bearing protector - Google Patents

Abstract

The utility model discloses a magnetic bearing protector, which comprises a static ring shell, a first sealing ring is arranged on the outer peripheral surface of the static ring shell, the outer side end of the static ring shell is open, a stationary ring embedded seat is arranged in the opening of the stationary ring shell, the stationary ring shell and the stationary ring embedded seat are connected and fixed through a second sealing ring, the stationary ring shell, the stationary ring embedded seat and the shaft form a ring chamber together, a circle of static ring embedding ring extending into the annular chamber is arranged at the inner side end of the static ring embedding seat, a plurality of magnets arranged circumferentially are also arranged at the inner side end of the static ring embedding seat, a rotating ring is arranged in the annular chamber, a third sealing ring is arranged between the rotating ring and the shaft, the rotating ring can be always rotationally sealed and attached to the static ring embedding ring under the action of the magnetic attraction of the magnets in the static ring embedding ring seat, and a cooling oil return flow passage for communicating the annular chamber with the interior of the equipment is arranged at the inner side end of the static ring shell. The utility model has the advantages of good sealing performance and long service life.

Description

Magnetic bearing protector

Technical Field

The utility model relates to a bearing protection equipment technical field, concretely relates to magnetic bearing protector.

Background

In mechanical equipment such as gear boxes, pumps, fans, etc., the bearings within the bearing housing need to operate under lubricated conditions. In most cases, the damage of the bearing is caused by the leakage of the lubricating oil and the entrance of external contaminants. Currently known bearing protection devices in the art include felt, rubber seals, mechanical seals, and the like. The felt seal is unreliable and there is leakage. The rubber oil seal has the disadvantages of easy aging, shaft abrasion, low applicable temperature and linear velocity and short service life.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a good and long service life's of leakproofness magnetic bearing protector.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a magnetic bearing protector comprises a stationary ring shell which is arranged between an equipment shell and a shaft and sleeved on the shaft with a certain radial clearance and is connected and fixed with the equipment shell, a first sealing ring used for sealing the clearance between the stationary ring shell and the equipment shell is arranged on the outer peripheral surface of the stationary ring shell, the outer side end of the stationary ring shell is open, a stationary ring embedding seat sleeved on the shaft with a certain radial clearance is arranged in the open of the stationary ring shell, the stationary ring shell and the stationary ring embedding seat are connected and fixed through a second sealing ring which is extruded between the stationary ring shell and the stationary ring embedding seat and can seal the clearance between the stationary ring shell and the stationary ring embedding seat, the stationary ring shell, the stationary ring embedding seat and the shaft form a ring chamber together, a circle of stationary ring embedded into the ring chamber is arranged at the inner side end of the stationary ring embedding seat, a plurality of magnets which are arranged in the circumferential direction are also arranged at the inner side end of the stationary ring embedding seat, a rotating ring which is sleeved on the shaft with a certain radial clearance and is made of magnetic attraction material is arranged in the ring chamber, and a third sealing ring which is used for transmitting the rotation of the shaft to the rotating ring and can contact and seal a gap between the rotating ring and the shaft is arranged between the rotating ring and the shaft, the rotating ring can be always and rotatably sealed and attached to the static ring embedding ring under the action of the magnetic attraction of the magnets in the static ring embedding seat, and a cooling oil return flow passage which is used for communicating the annular chamber with the inside of the equipment is arranged at the inner side end of the static ring shell.

Further, the aforementioned magnetic bearing protector, wherein: the structure of cooling oil return runner includes: an inner ring surface of the inner side end of the static ring shell is concave to form a cooling oil return groove, a plurality of oil return holes used for communicating the annular cavity with the cooling oil return groove are formed in the outer groove wall of the cooling oil return groove along the circumferential direction, an oil return opening used for communicating the cooling oil return groove with the interior of equipment is formed in the lower portion of the inner groove wall of the cooling oil return groove, and the oil return opening, the cooling oil return groove and each oil return hole form a cooling oil return flow channel.

Further, the aforementioned magnetic bearing protector, wherein: the inner ring surface of the rotating ring is concave to form a sealing ring groove, and the third sealing ring is arranged in the sealing ring groove in an extruded mode, so that the third sealing ring can transmit the rotation of the shaft to the rotating ring and can contact and seal a gap between the third sealing ring and the rotating ring.

Through the implementation of the above technical scheme, the beneficial effects of the utility model are that: (1) through the design of the cooling oil return flow channel, lubricating oil entering the annular chamber from a gap between the static ring shell and the shaft can flow back into the equipment, and in the process that the lubricating oil flows back into the equipment, the lubricating oil can take away heat generated by friction of the rotating ring and the static ring embedded ring, so that the online cooling of the rotating ring and the static ring embedded ring is realized, the service lives of the rotating ring and the static ring embedded ring are prolonged, and the service life of the whole bearing protector is prolonged; (2) the rotation of the shaft is transmitted to the rotating ring through the third sealing ring, so that the rotating ring and the shaft synchronously rotate, zero abrasion between the rotating ring and the shaft is realized, the service life of the rotating ring is prolonged, and the service life of the whole bearing protector is further prolonged; (3) through the friction compensation seal, the first seal ring, the second seal ring and the third seal ring of the rotary ring and the stationary ring embedded ring, effective sealing between the equipment shell and the shaft is realized, and the sealing performance is good.

Drawings

Fig. 1 is a schematic structural view of the magnetic bearing protector of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.

As shown in fig. 1, the magnetic bearing protector comprises a stationary ring housing 2 which is arranged between an equipment housing and a shaft 1 and sleeved on the shaft 1 with a certain radial clearance and is connected and fixed with the equipment housing, a first sealing ring 14 for sealing the clearance between the stationary ring housing 2 and the equipment housing is arranged on the outer circumferential surface of the stationary ring housing 2, one end of the stationary ring housing 2 close to the inside of the equipment is an inner side end, one end of the stationary ring housing 2 far away from the inside of the equipment is an outer side end, the outer side end of the stationary ring housing 2 is open, a stationary ring embedding seat 3 sleeved on the shaft 1 with a certain radial clearance is arranged in the opening of the stationary ring housing 2, the stationary ring housing 2 and the stationary ring embedding seat 3 are connected and fixed with each other through a second sealing ring 4 which is extruded between the stationary ring housing 2 and the stationary ring embedding seat 3 and can seal the clearance between the stationary ring housing 2 and the stationary ring embedding seat 3, and the shaft 1 together form an annular chamber 5, a circle of stationary ring embedding rings 6 extending into the annular chamber 5 are arranged at the inner side end of the stationary ring embedding seat 3, a plurality of magnets 7 arranged circumferentially are also arranged at the inner side end of the stationary ring embedding seat 3, a rotating ring 8 which is sleeved on the shaft 1 with a certain radial gap and is made of magnetic attraction materials is arranged in the annular chamber 5, a third sealing ring 9 which is used for transmitting the rotation of the shaft 1 to the rotating ring 8 and can contact and seal the gap between the rotating ring and the shaft 1 is arranged between the rotating ring 8 and the shaft 1, the rotating ring 8 can be always rotatably sealed and attached to the stationary ring embedding rings 6 under the action of the magnetic attraction of the magnets 7 in the stationary ring embedding seat 3, a cooling oil return flow passage which is used for communicating the annular chamber 5 with the inside of the equipment is arranged at the inner side end of the stationary ring casing 2, and lubricating oil entering the annular chamber 5 from the gap between the stationary ring casing 2 and the shaft 1 can flow back into the inside of the equipment again through the cooling oil return flow passage, in the process that the lubricating oil flows back into the equipment, the lubricating oil can take away heat generated by friction of the rotating ring and the static ring embedded ring, so that the rotating ring and the static ring embedded ring are cooled on line, the service life of the rotating ring and the static ring embedded ring is prolonged, and the service life of the whole bearing protector is further prolonged;

in this embodiment, the structure of the cooling oil return flow passage includes: an inner ring surface at the inner side end of the static ring shell 2 is concave to form a cooling oil return groove 10, a plurality of oil return holes 11 for communicating the annular cavity 5 with the cooling oil return groove 10 are circumferentially arranged on the outer groove wall of the cooling oil return groove 10, an oil return opening 12 for communicating the cooling oil return groove 10 with the interior of equipment is arranged at the lower part of the inner groove wall of the cooling oil return groove 10, and the oil return opening 12, the cooling oil return groove 10 and each oil return hole 11 form a cooling oil return flow passage; in the embodiment, the inner ring surface of the rotating ring 8 is concave to form a sealing ring groove 13, the third sealing ring 9 is arranged in the sealing ring groove 13 in a pressing mode, so that the third sealing ring 9 can transmit the rotation of the shaft 1 to the rotating ring 8 and can be in contact with and seal a gap between the rotating ring and the rotating ring, the rotation of the shaft 1 is transmitted to the rotating ring 8 through the third sealing ring, so that the rotating ring and the shaft synchronously rotate, zero abrasion between the rotating ring and the shaft is realized, the service life of the rotating ring is further prolonged, and the service life of the whole bearing protector is further prolonged;

when the device is used, the rotating ring 8 can be always in sealing fit with the static ring insert 6 in a rotating way under the action of the magnetic attraction of the magnets 7 in the static ring insert seat 3, and the effective sealing between the device shell and the shaft is realized through the first sealing ring, the second sealing ring and the third sealing ring; after lubricating oil got into annular chamber 5 from the clearance between quiet ring housing 2 and the axle 1, the lubricating oil that gets into annular chamber 5 again passes through oil gallery 11 in proper order, inside oil gallery 10 and oil gallery 12 backward flow income equipment, at the inside in-process of annular chamber 5 backward flow income equipment of lubricating oil, lubricating oil can inlay the heat that ring 6 friction produced with rotatory ring 8 and quiet ring and take away, thereby realize inlaying the online cooling of ring 6 to rotatory ring 8 and quiet ring, the life who inlays the ring with rotatory ring has been prolonged, thereby the holistic life of bearing protector has been prolonged.

The utility model has the advantages that: (1) through the design of the cooling oil return flow channel, lubricating oil entering the annular chamber from a gap between the static ring shell and the shaft can flow back into the equipment, and in the process that the lubricating oil flows back into the equipment, the lubricating oil can take away heat generated by friction of the rotating ring and the static ring embedded ring, so that the online cooling of the rotating ring and the static ring embedded ring is realized, the service lives of the rotating ring and the static ring embedded ring are prolonged, and the service life of the whole bearing protector is prolonged; (2) the rotation of the shaft is transmitted to the rotating ring through the third sealing ring, so that the rotating ring and the shaft synchronously rotate, zero abrasion between the rotating ring and the shaft is realized, the service life of the rotating ring is prolonged, and the service life of the whole bearing protector is further prolonged; (3) through the friction compensation seal, the first seal ring, the second seal ring and the third seal ring of the rotary ring and the stationary ring embedded ring, effective sealing between the equipment shell and the shaft is realized, and the sealing performance is good.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and any modifications or equivalent changes made in accordance with the technical spirit of the present invention are also within the scope of the present invention.

Claims (3)

1. Magnetic bearing protector, its characterized in that: the magnetic suction type static ring magnetic suction device comprises a static ring shell which is arranged between an equipment shell and a shaft and sleeved on the shaft with a certain radial clearance and is connected and fixed with the equipment shell, a first sealing ring used for sealing the clearance between the static ring shell and the equipment shell is arranged on the outer peripheral surface of the static ring shell, the outer side end of the static ring shell is open, a static ring embedding seat sleeved on the shaft with a certain radial clearance is arranged in the opening of the static ring shell, the static ring shell and the static ring embedding seat are connected and fixed through a second sealing ring which is extruded between the static ring shell and the static ring embedding seat and can seal the clearance between the static ring shell and the static ring embedding seat, the static ring shell, the static ring embedding seat and the shaft form a ring chamber together, a circle of static ring embedding ring extending into the ring chamber is arranged at the inner side end of the static ring embedding seat, a plurality of magnets which are arranged in the circumferential direction are also arranged at the inner side end of the static ring embedding seat, a magnetic suction ring which is sleeved on the shaft with a certain radial clearance and is made of a suction material is arranged in the ring chamber, and a third sealing ring which is used for transmitting the rotation of the shaft to the rotating ring and can contact and seal a gap between the rotating ring and the shaft is arranged between the rotating ring and the shaft, the rotating ring can be always and rotatably sealed and attached to the static ring embedding ring under the action of the magnetic attraction of the magnets in the static ring embedding seat, and a cooling oil return flow passage which is used for communicating the annular chamber with the inside of the equipment is arranged at the inner side end of the static ring shell.

2. The magnetic bearing protector of claim 1, wherein: the structure of cooling oil return runner includes: an inner ring surface of the inner side end of the static ring shell is concave to form a cooling oil return groove, a plurality of oil return holes used for communicating the annular cavity with the cooling oil return groove are formed in the outer groove wall of the cooling oil return groove along the circumferential direction, an oil return opening used for communicating the cooling oil return groove with the interior of equipment is formed in the lower portion of the inner groove wall of the cooling oil return groove, and the oil return opening, the cooling oil return groove and each oil return hole form a cooling oil return flow channel.

3. The magnetic bearing protector of claim 1, wherein: the inner ring surface of the rotating ring is concave to form a sealing ring groove, and the third sealing ring is arranged in the sealing ring groove in an extruded mode, so that the third sealing ring can transmit the rotation of the shaft to the rotating ring and can contact and seal a gap between the third sealing ring and the rotating ring.

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