CN111043163A - Bearing sealing structure for magnetic transmission - Google Patents

Bearing sealing structure for magnetic transmission Download PDF

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Publication number
CN111043163A
CN111043163A CN201911408307.4A CN201911408307A CN111043163A CN 111043163 A CN111043163 A CN 111043163A CN 201911408307 A CN201911408307 A CN 201911408307A CN 111043163 A CN111043163 A CN 111043163A
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CN
China
Prior art keywords
bearing
packing
transmission shaft
filler
shaft
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201911408307.4A
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Chinese (zh)
Inventor
夏权威
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Wenzhou Institute Of Industry & Science
Original Assignee
Wenzhou Institute Of Industry & Science
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Filing date
Publication date
Application filed by Wenzhou Institute Of Industry & Science filed Critical Wenzhou Institute Of Industry & Science
Priority to CN201911408307.4A priority Critical patent/CN111043163A/en
Publication of CN111043163A publication Critical patent/CN111043163A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/44—Free-space packings
    • F16J15/447—Labyrinth packings

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
  • Sealing Of Bearings (AREA)

Abstract

The invention relates to a bearing sealing structure for a magnetic transmission, which comprises a transmission shaft, a rolling bearing and a cylindrical bearing seat, wherein the rolling bearing is arranged in the cylindrical bearing seat, and the transmission shaft is arranged on the rolling bearing in a penetrating way in the cylindrical bearing seat. According to the invention, the isolating shaft sleeve is arranged in the shaft sealing structure, the isolating shaft sleeve is arranged between the transmission shaft and the filler to form the inner side wall of the filler cavity, the transmission shaft is isolated from the filler, the isolating shaft sleeve is in linkage connection with the transmission shaft, the filler does not move relative to the isolating shaft sleeve and the transmission shaft, the filler and the transmission shaft rotate together, and lubricating grease can radially overflow, so that the sealing position of the filler can be fully lubricated in the whole service cycle of the magnetic driver, the problem of dry grinding caused by the fact that the traditional magnetic driver sealing cavity cannot be filled with oil is solved, the problem of transmission shaft abrasion caused by friction is avoided, and the service life of the transmission shaft is prolonged.

Description

Bearing sealing structure for magnetic transmission
Technical Field
The invention relates to a bearing sealing structure, in particular to a bearing sealing structure for a magnetic transmission.
Background
The magnetic driver solves the sealing problem of the transmission device of the reaction kettle. However, due to the structural characteristics, the bearing is directly exposed in a gas-phase medium of the reaction kettle, and the lubricating grease is directly contacted with the gas-phase medium, so that the corrosion resistance of the bearing and the chemical stability of the lubricating grease are directly related to the service life of the bearing. The grease is damaged by the gas phase medium and is lost, so that the bearing is worn, and the most frequent fault of the magnetic driver occurs. At present, the sealing problem of the magnetic driver bearing is not deeply researched at home and abroad, and only oil seals, fillers, mechanical seals or additionally arranged oil receiving cups and the like are adopted, so that the sealing problem of the bearing cannot be thoroughly solved, the shaft can be abraded, and lubricating grease can be leaked to cause pollution.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a bearing sealing structure for a magnetic transmission, by adopting the structure, the sealing of a bearing can be realized, the abrasion of a transmission shaft is avoided, the contact and the leakage of lubricating grease and a medium are avoided, and the service life is prolonged.
In order to achieve the purpose, the invention discloses a bearing sealing structure for a magnetic transmission, which comprises a transmission shaft, a rolling bearing and a cylindrical bearing seat, wherein the rolling bearing is arranged in the cylindrical bearing seat, the transmission shaft is arranged on the rolling bearing in a penetrating way in the cylindrical bearing seat, the transmission shaft is provided with a shaft sealing structure, the shaft sealing structure comprises a packing cavity and packing arranged in the packing cavity, and the bearing sealing structure is characterized in that: the shaft sealing structure comprises an isolation shaft sleeve, the isolation shaft sleeve is arranged between a transmission shaft and a filler to form the inner side wall of a filler cavity and isolate the transmission shaft from the filler, the isolation shaft sleeve is in linkage connection with the transmission shaft, the filler is in linkage with the isolation shaft sleeve, an oil storage ring is arranged in the middle of the filler cavity, and pressing forces of two end faces of the filler are equal.
According to the invention, the isolating shaft sleeve is arranged in the shaft sealing structure, the isolating shaft sleeve is arranged between the transmission shaft and the filler to form the inner side wall of the filler cavity, the transmission shaft is isolated from the filler, the isolating shaft sleeve is in linkage connection with the transmission shaft, the filler is in linkage arrangement with the isolating shaft sleeve, the oil storage ring is arranged in the middle of the filler cavity, and pressing forces of two end surfaces of the filler are equal, so that the stress condition in the filler is changed, the radial force distribution of the filler is more uniform, and more reliable sealing under the condition of smaller pressing force is realized; in addition, the packing is installed on the isolation shaft sleeve, and does not have relative motion with isolation shaft sleeve and transmission shaft, and the packing rotates with the transmission shaft together, and lubricating grease can radially overflow for magnetic drive ware in its whole life cycle, the sealed department of packing can both obtain abundant lubrication, has solved the problem that traditional magnetic drive ware sealed chamber can't refuel and lead to dry grinding, has avoided leading to the problem of transmission shaft wearing and tearing because of the friction, has prolonged the life of transmission shaft.
As a further arrangement of the invention, the upper end and the lower end of the bearing are respectively provided with an oil seal, and the bearing sealing structure for the magnetic transmission is also provided with a pressure balance channel communicated with the oil seals at the upper end and the lower end of the bearing, so that the pressures borne by the oil seals at the upper end and the lower end of the bearing are balanced. Through setting up such pressure balance passageway for even under the condition that shaft seal structure takes place to leak, gaseous phase medium passes through shaft seal structure and gets into in the bearing frame, gaseous phase medium also can pass through the pressure balance passageway, reaches pressure balance in the bearing both ends oil blanket outside rapidly, thereby has stopped gaseous phase medium and has got into inside the bearing, and protection bearing and lubricating grease are not destroyed.
As a further arrangement of the invention, a labyrinth structure is arranged between the shaft sealing structure and the adjacent bearing oil seal. The labyrinth structure is arranged above the shaft sealing structure, so that the magnetic driver can be used for a long time, lubricating grease in the bearing generates trace leakage, the labyrinth effect is achieved, and the pollution to media in the reaction kettle is avoided.
The shaft sealing structure further comprises a packing cylinder, the packing cylinder is sleeved outside the isolation shaft sleeve, a flange plate is arranged at the connecting end of the packing cylinder and fixedly connected with the cylindrical bearing seat, a flange towards the center is sleeved on the packing cylinder, a flange which protrudes radially is arranged at the inner side end of the isolation shaft sleeve and is in clearance fit with the inner diameter of the packing cylinder, a space between the inner side wall of the packing cylinder, the outer side wall of the isolation shaft sleeve and the surface of the flange forms a packing cavity, an elastic gasket is arranged at the bottom of the packing cavity, the packing and an oil storage ring are arranged in the packing cavity, a gland is arranged in the packing cavity for compressing, and the gland is fixedly connected with the isolation shaft sleeve to form linkage.
The invention is further described with reference to the following figures and specific embodiments.
Drawings
FIG. 1 is a sectional view of the internal structure of an embodiment of the present invention;
fig. 2 is a partially enlarged view of fig. 1I.
Detailed Description
The bearing sealing structure for the magnetic transmission comprises a transmission shaft 1, a rolling bearing 2 and a cylindrical bearing seat 3, wherein the transmission shaft 1 is also provided with a shaft sealing structure. The rolling bearing 2 is arranged in the cylindrical bearing seat 3 at a position close to the port, and the transmission shaft 1 is arranged on the rolling bearing 2 in the cylindrical bearing seat 3 in a penetrating way. The shaft sealing structure comprises a packing cavity and a packing 4 arranged in the packing cavity, the shaft sealing structure further comprises an isolation shaft sleeve 5, the isolation shaft sleeve 5 is sleeved on the transmission shaft 1 and is arranged between the transmission shaft 1 and the packing 4 to form the inner side wall of the packing cavity, the transmission shaft 1 is isolated from the packing 4, the isolation shaft sleeve 5 is in linkage connection with the transmission shaft 1, preferably, a set screw 5 is used for fixing connection, the packing 4 is in linkage connection with the isolation shaft sleeve 5, if enough clamping force is applied to two ends of the packing 4, the packing 4 is in linkage with the isolation shaft sleeve 5, the packing 4, the transmission shaft 1 and the isolation shaft sleeve 5 rotate together, an oil storage ring 6 is arranged in the middle of the packing cavity, and the clamping force of two end faces of the packing 4 is equal.
The invention will now be further described with reference to the preferred embodiments.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
As shown in fig. 1-2, the bearing sealing structure for the magnetic transmission comprises a transmission shaft 1, a rolling bearing 2 and a cylindrical bearing seat 3, wherein the transmission shaft 1 is further provided with a shaft sealing structure. The rolling bearing 2 is arranged in the cylindrical bearing seat 3 and is close to the lower end opening of the cylindrical bearing seat 3, and the transmission shaft 1 is arranged on the rolling bearing 2 in the cylindrical bearing seat 3 in a penetrating mode. The shaft sealing structure comprises a packing cavity and packing 4 arranged in the packing cavity, the shaft sealing structure also comprises an isolation shaft sleeve 5, the inner diameter of the isolation shaft sleeve 5 is in clearance fit with the transmission shaft 1, preferably in zero fit, the isolation shaft sleeve 5 is sleeved on the transmission shaft 1 and arranged between the transmission shaft 1 and the packing 4 to form the inner side wall of the packing cavity and isolate the transmission shaft 1 from the packing 4, the isolation shaft sleeve 5 and the transmission shaft 1 are preferably fixedly connected by a set screw 5 to form linkage, the shaft sealing structure also comprises a packing barrel 7, the diameter of the packing barrel 7 is larger than the outer diameter of the isolation shaft sleeve 5 and is sleeved outside the isolation shaft sleeve 5, a flange plate 701 is arranged at the connecting end of the packing barrel 7 and is fixedly connected with the end surface of the cylindrical bearing seat 3, the packing barrel 7 is sleeved with a flange 702 with a center, and the inner hole of the, the inner side end (one end close to the cylindrical bearing seat 3) of the isolation shaft sleeve 5 is provided with a flange 501 protruding in the radial direction and in clearance fit with the inner diameter of the packing cylinder 7, the space between the inner side wall of the packing cylinder 7, the outer side wall of the isolation shaft sleeve 5 and the surface of the flange 501 forms a packing cavity, the bottom of the packing cavity is provided with an elastic washer 8, the packing 4 and an oil storage ring 6 are arranged in the packing cavity, the oil storage ring 6 is arranged in the middle of the packing 4, the port of the packing cavity is provided with a gland 9 for compressing, and the gland 9 is fixedly connected with the isolation shaft sleeve 5 to form linkage. The elastic washer 8 is arranged to enable pressing forces exerted on the inner end and the outer end of the packing 4 to be equal when the gland 9 presses the packing 4, so that the stress condition inside the packing 4 is changed, the radial force distribution of the packing 4 is more uniform, and more reliable sealing is realized under the condition of smaller pressing force. And simultaneously clamping the packing 4, so that the packing 4 and the isolation shaft sleeve 5 are arranged in a linkage manner and rotate together.
Further, in this embodiment, the upper and lower ends of the bearing are respectively provided with oil seals 10 for protecting and lubricating the rolling bearing 2, and the upper and lower oil seals 10 are respectively disposed in the bearing seat 3 above the rolling bearing 2 and on the flange 701 of the packing cylinder 7. Preferably, the bearing sealing structure for the magnetic transmission is further provided with a pressure balance channel 11 communicated with the oil seals 10 at the upper end and the lower end of the bearing, so that the pressures borne by the oil seals 10 at the upper end and the lower end of the bearing are balanced. In this embodiment, the side wall of the bearing seat 3 and the corresponding position on the flange 701 of the stuffing cylinder 7 are provided with ducts respectively communicated with the outer sides of the oil seals 10 at the upper and lower ends of the bearing 2 relative to the rolling bearing 2. Through setting up such pressure balance passageway 11 for even under the condition that shaft seal structure takes place to leak, gaseous phase medium passes through shaft seal structure and gets into in the bearing frame 3, gaseous phase medium also can pass through pressure balance passageway 11, reaches pressure balance in the bearing both ends oil blanket 10 outside fast, thereby has stopped gaseous phase medium to get into inside the bearing, and protection bearing and lubricating grease are not destroyed.
Further, a labyrinth structure is provided between the shaft seal structure and the adjacent bearing oil seal 10. Set up labyrinth structure 12 above the shaft seal structure for magnetic actuator uses for a long time, and the inside lubricating grease of bearing produces the trace and leaks, has the effect of labyrinth, also is unlikely to get into inside the reation kettle, avoids causing the pollution to the cauldron internal medium.
The present invention is not limited to the above embodiments, and those skilled in the art can implement the present invention in other embodiments according to the disclosure of the present invention, or make simple changes or modifications according to the design structure and idea of the present invention, and fall into the protection scope of the present invention.

Claims (4)

1. The utility model provides a bearing seal structure for magnetic drive ware, includes transmission shaft, antifriction bearing and tube-shape bearing frame, antifriction bearing sets up in the tube-shape bearing frame, the transmission shaft is worn to establish and is set up on antifriction bearing in the tube-shape bearing frame, be equipped with axle seal structure on the transmission shaft, axle seal structure includes the packing chamber and sets up the packing wherein, its characterized in that: the shaft sealing structure comprises an isolation shaft sleeve, the isolation shaft sleeve is arranged between a transmission shaft and a filler to form the inner side wall of a filler cavity and isolate the transmission shaft from the filler, the isolation shaft sleeve is in linkage connection with the transmission shaft, the filler is in linkage with the isolation shaft sleeve, an oil storage ring is arranged in the middle of the filler cavity, and pressing forces of two end faces of the filler are equal.
2. The bearing seal structure for a magnetic force transmission device according to claim 1, characterized in that: the bearing sealing structure for the magnetic transmission is also provided with a pressure balance channel communicated with the oil seals at the upper end and the lower end of the bearing, so that the pressures of the oil seals at the upper end and the lower end of the bearing are balanced.
3. The bearing seal structure for a magnetic force transmission device according to claim 2, characterized in that: and a labyrinth structure is arranged between the shaft sealing structure and the adjacent bearing oil seal.
4. The bearing seal structure for a magnetic force transmission device according to claim 3, characterized in that: the shaft sealing structure further comprises a packing barrel, the packing barrel is sleeved outside the isolation shaft sleeve, a flange plate is arranged at the connecting end of the packing barrel and fixedly connected with the cylindrical bearing seat, a flange towards the center is arranged on the packing barrel sleeve, a flange protruding in the radial direction is arranged at the inner side end of the isolation shaft sleeve and in clearance fit with the inner diameter of the packing barrel, the inner side wall of the packing barrel and the outer side wall of the isolation shaft sleeve and the space between the surfaces of the flange form a packing cavity, an elastic gasket is arranged at the bottom of the packing cavity, the packing and an oil storage ring are arranged in the packing cavity, the packing cavity is provided with a gland for compression, and the gland is fixedly connected with the isolation shaft sleeve.
CN201911408307.4A 2019-12-31 2019-12-31 Bearing sealing structure for magnetic transmission Pending CN111043163A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911408307.4A CN111043163A (en) 2019-12-31 2019-12-31 Bearing sealing structure for magnetic transmission

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911408307.4A CN111043163A (en) 2019-12-31 2019-12-31 Bearing sealing structure for magnetic transmission

Publications (1)

Publication Number Publication Date
CN111043163A true CN111043163A (en) 2020-04-21

Family

ID=70242303

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201911408307.4A Pending CN111043163A (en) 2019-12-31 2019-12-31 Bearing sealing structure for magnetic transmission

Country Status (1)

Country Link
CN (1) CN111043163A (en)

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