CN111486231A - Single-bearing bidirectional combined sealing device - Google Patents
Single-bearing bidirectional combined sealing device Download PDFInfo
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- CN111486231A CN111486231A CN201910077109.8A CN201910077109A CN111486231A CN 111486231 A CN111486231 A CN 111486231A CN 201910077109 A CN201910077109 A CN 201910077109A CN 111486231 A CN111486231 A CN 111486231A
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- Prior art keywords
- bearing
- seal
- sealing
- cover
- sealing cover
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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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/10—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing
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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
- F16C33/30—Parts of ball or roller bearings
- F16C33/66—Special parts or details in view of lubrication
- F16C33/6637—Special parts or details in view of lubrication with liquid lubricant
- F16C33/664—Retaining the liquid in or near the bearing
- F16C33/6651—Retaining the liquid in or near the bearing in recesses or cavities provided in retainers, races or rolling elements
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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
- F16C37/00—Cooling of bearings
- F16C37/007—Cooling of bearings of rolling bearings
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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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
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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)
Abstract
The invention provides a single-bearing bidirectional combined sealing device which comprises an outer shaft sleeve, a sealing cover A, a sealing baffle ring, a straight-through type pressure injection oil cup A, an inner shaft sleeve, a bearing seat, a straight-through type pressure injection oil cup B, a sealing cover B and a radial labyrinth sealing cover. The combined seal adopting various seal structure forms is reliable, the service life is long, the synchronous high-speed rotation of the internal seal baffle ring, the radial labyrinth seal cover and the like can play a role in dynamic seal, and the combined seal also has a cooling and heat dissipation function, so that the service lives of the bearing and the lubricant are prolonged. Realize that mechanical type dynamic seal (axial, terminal surface) and static seal are the two-way combination seal that complements each other, can avoid emollient toward leaking, also can avoid during external medium gets into the bearing cavity, guarantee that the bearing reaches better sealed effect, solve among the current single bearing seal technical field because the bearing seals badly, cause bearing life to reduce, the problem that the bearing generates heat and burns out.
Description
Technical Field
The invention relates to the technical field of bearing sealing, in particular to a single-bearing bidirectional combined sealing device.
Background
The bearing is a lightweight part in modern mechanical equipment. Its main function is to support the mechanical rotating body to reduce the friction coefficient of mechanical load of equipment in the transmission process. In order to maintain a good lubrication condition and a normal working environment of the bearing, fully exert the working performance of the bearing and prolong the service life of the bearing, the bearing must have a good seal to prevent leakage of lubricant and intrusion of dust, moisture or other dirt, and ensure the normal operation of mechanical equipment. If the bearing is sealed badly, the working condition of the bearing is obviously deteriorated, and the service life of the bearing is obviously reduced; if oil leaks, the normal lubrication of the bearing is damaged, and the bearing is burnt out due to heating. In addition, oil leakage not only causes waste, but also pollutes mechanical equipment and processed products.
Therefore, the bearing sealing design needs to adopt combined sealing devices in various sealing structure forms according to the requirements of the working condition and the working environment of the bearing on the sealing degree so as to achieve better sealing effect.
Disclosure of Invention
The invention aims to solve the problems of reduced service life of a bearing and heating and burning of the bearing caused by poor sealing of the bearing in the technical field of sealing of the existing bearing, and provides a single-bearing bidirectional combined sealing device to ensure reliable sealing and long service life of the bearing.
In order to solve the problems, the technical solution of the invention is as follows:
a single-bearing bidirectional combined sealing device. The sealing structure mainly comprises a shaft, an outer shaft sleeve, an O-shaped sealing ring A, a sealing cover A, an oil sealing pad A, a connecting bolt, a sealing baffle ring, a straight-through type pressure filling oil cup A, an inner shaft sleeve, a bearing seat, a straight-through type pressure filling oil cup B, a sealing cover B, an oil sealing pad B, a radial labyrinth sealing cover, an O-shaped sealing ring B and a set screw, wherein the outer shaft sleeve, the sealing baffle ring, the inner shaft sleeve, the bearing and the radial labyrinth sealing cover provided with the O-shaped sealing ring B rotate at high speed along with the shaft, and the sealing cover A and the sealing cover B are fixed on two end faces of the bearing seat through the connecting bolt and are in a static.
In the rotation process of the shaft, an axial mechanical dynamic seal is formed between the outer shaft sleeve and the sealing cover A, and an axial mechanical dynamic seal is also formed between the shaft and the sealing cover B; mechanical end face dynamic seal is formed among the shaft, the radial labyrinth seal cover and the seal cover B;
an axial static seal is formed between the outer shaft sleeve and the shaft through an O-shaped seal ring A, an axial static seal is formed between the radial labyrinth seal cover and the shaft through an O-shaped seal ring B, and the oil seal pad A and the oil seal pad B are static seals of the end faces of the bearing seats.
Compared with the prior art, the invention has the beneficial effects that:
1. the dynamic seal is mechanical, the static seal is an O-shaped rubber ring or an oil seal pad which complement each other, and the combined seal of the various seal structure forms is reliable and has long service life;
2. the inner sealing baffle ring, the radial labyrinth sealing cover and the like rotate at high speed synchronously, so that the dynamic sealing effect is achieved, the cooling and radiating functions are achieved, and the service lives of the bearing and the lubricant are prolonged;
3. the bidirectional sealing can be realized inside and outside, so that not only can the lubricant be prevented from leaking outwards, but also external media can be prevented from entering the bearing cavity, and the application range is wide;
4. easy, convenient and fast processing, manufacturing, mounting, dismounting, maintenance and the like.
Drawings
Fig. 1 is a schematic front view of a single-bearing bidirectional combined sealing device according to the present invention.
Reference numerals: 1-shaft, 2-outer shaft sleeve, 3-O type sealing ring A, 4-sealing cover A, 5-oil sealing pad A, 6-connecting bolt, 7-sealing baffle ring, 8-straight-through type pressure injection oil cup A, 9-inner shaft sleeve, 10-bearing, 11-bearing seat, 12-straight-through type pressure injection oil cup B, 13-sealing cover B, 14-oil sealing pad B, 15-radial labyrinth sealing cover, 16-O type sealing ring B, 17-set screw and connecting bolt 18.
Detailed Description
The invention is described in further detail below with reference to the figures and the detailed description.
Referring to the attached figure 1, the single-bearing bidirectional combined sealing device comprises a shaft 1, an outer shaft sleeve 2, an O-shaped sealing ring A3, a sealing cover A4, an oil sealing pad A5, a connecting bolt 6, a sealing baffle ring 7, a straight-through type pressure injection oil cup A8, an inner shaft sleeve 9, a bearing 10, a bearing seat 11, a straight-through type pressure injection oil cup B12, a sealing cover B13, an oil sealing pad B14, a radial labyrinth sealing cover 15, an O-shaped sealing ring B16, a set screw 17 and a connecting bolt 18.
The bearing 10 is fixedly arranged on the shaft 1 and is arranged in the bearing seat 11, the sealing cover A4 is fixedly arranged on one side end face of the bearing seat 11 through the connecting bolt 6 and axially compresses the end face of the outer ring of the bearing 10, and the sealing cover B13 is fixedly arranged on the other side end face of the bearing seat 11 through the connecting bolt 18.
The outer shaft sleeve 2, the sealing baffle ring 7 and the inner shaft sleeve 9 are sequentially and fixedly arranged on the shaft 1, rotate together with the shaft 1 and form a dynamic seal with a sealing cover A4, and the inner shaft sleeve 9 axially supports the end face of an inner ring of the bearing 10; the radial labyrinth seal cover 15 equipped with the O-ring B16 is mounted on the shaft 1 by a set screw 17, rotates with the shaft 1, and forms a dynamic seal with the seal cover B13.
The sealing baffle ring 7, the inner shaft sleeve 9, the bearing 10 and the sealing cover A4 form an oil injection cavity at one side, the bearing seat 11 and the sealing cover A4 are respectively provided with radial through holes corresponding to the oil injection cavity, and the bearing seat 11 corresponding to the through holes is provided with a straight-through type pressure injection oil cup A8; the sealing cover B13, the shaft 1, the bearing 10 and the bearing seat 11 form an oil injection cavity at the other side, the bearing seat 11 is provided with a radial through hole corresponding to the oil injection cavity, and the bearing seat 11 corresponding to the through hole is provided with a straight-through type pressure injection oil cup B12.
Three annular seal grooves are arranged on one surface of the inner wall of the seal cover A4, which is contacted with the outer shaft sleeve 2; and three annular sealing grooves are arranged on one surface of the inner wall of the sealing cover B13, which is in contact with the shaft 1, and play a role in throttling lubricating oil. An O-shaped sealing ring A3 is arranged between the outer shaft sleeve 2 and the shaft 1, and an O-shaped sealing ring B16 is arranged between the radial labyrinth sealing cover 15 and the shaft 1. The sealing cover A4 provided with the oil sealing pad A5 and the sealing cover B13 provided with the oil sealing pad B14 are fixedly arranged on two end surfaces of the bearing seat 11 respectively through the connecting bolt 6 and the connecting bolt 18, and the relative shaft 1 is in a static fixed state.
The working principle is as follows:
before the bearing 10 rotates, the lubricant is directly injected into cavities on two sides of the bearing 10 in the bearing seat 11 from the straight-through type pressure injection oil cup A8 and the straight-through type pressure injection oil cup B12, so as to lubricate the bearing 10 and keep the pressure in the cavities slightly higher than the external atmospheric pressure.
When the shaft 1 rotates to drive the bearing 10 to rotate, the outer shaft sleeve 2 provided with the O-shaped sealing ring A3, the sealing baffle ring 7, the inner shaft sleeve 9, the bearing 10 and the radial labyrinth sealing cover 15 provided with the O-shaped sealing ring B16 rotate at a high speed along with the shaft 1, an axial mechanical dynamic seal is formed between the outer shaft sleeve 2 rotating at the high speed and the stationary sealing cover A4, and an axial mechanical dynamic seal is also formed between the rotating shaft 1 rotating at the high speed and the stationary sealing cover B13. A mechanical end face dynamic seal is formed between the radial labyrinth seal cover 15 rotating at high speed together with the shaft 1 and the outside of the seal cover B13.
An O-shaped sealing ring A3 is arranged in the outer shaft sleeve 2, so that axial static sealing is formed between the outer shaft sleeve 2 and the shaft 1, and the installation fit clearance between the outer shaft sleeve 2 and the shaft 1 is compensated; an O-shaped sealing ring B16 is arranged in the radial labyrinth seal cover 15, so that an axial static seal is formed between the radial labyrinth seal cover 15 and the shaft 1, and the installation fit clearance between the radial labyrinth seal cover 15 and the shaft 1 is compensated.
The oil seal pad A5 and the oil seal pad B14 are static seals of the end face of the bearing seat 11; the sealing baffle ring 7 arranged on the shaft 1 rotates at high speed along with the shaft 1 to also play a role in cooling the temperature in the cavity of the bearing 10 and the bearing seat 11 thereof; the radial labyrinth seal cover 15 which rotates at high speed along with the shaft 1 also plays a role in cooling, heat dissipation and temperature reduction; the sealing cover a4 equipped with the oil seal a5 also functions to compensate the outer race of the support bearing 10.
The combined seal with various seal structure forms can ensure that the bearing achieves better sealing effect.
The advantages are that: the dynamic seal is mechanical, the static seal is an O-shaped rubber ring or an oil seal pad which complement each other, and the combined seal of the various seal structure forms is reliable and has long service life; the inner sealing baffle ring, the radial labyrinth sealing cover and the like rotate at high speed synchronously, so that the dynamic sealing effect is achieved, the cooling and radiating functions are achieved, and the service lives of the bearing and the lubricant are prolonged; the bidirectional sealing can be realized inside and outside, so that not only can the lubricant be prevented from leaking outwards, but also external media can be prevented from entering the bearing cavity, and the application range is wide; easy, convenient and fast processing, manufacturing, mounting, dismounting, maintenance and the like.
Claims (6)
1. The utility model provides a two-way combination sealing device of single bearing, includes bearing (10), installation axle (1) and bearing frame (11), its characterized in that: the labyrinth seal structure comprises an outer shaft sleeve (2), a seal cover A (4), a seal baffle ring (7), an inner shaft sleeve (9), a seal cover B (13) and a radial labyrinth seal cover (15); wherein:
the sealing cover A (4) is fixedly arranged on the end surface of one side of the bearing seat (11) and axially compresses the end surface of the outer ring of the bearing (10); the sealing cover B (13) is fixedly arranged on the end surface of the other side of the bearing seat (11); the outer shaft sleeve (2), the sealing baffle ring (7) and the inner shaft sleeve (9) are sequentially and fixedly arranged on the shaft (1) and rotate along with the shaft (1) to respectively form dynamic sealing with the sealing cover A (4); the inner shaft sleeve (9) axially supports the end surface of the inner ring of the bearing (10); the sealing baffle ring (7), the inner shaft sleeve (9), the bearing (10) and the sealing cover A (4) form an oil injection cavity at one side, radial through holes are respectively arranged at the positions of the bearing seat (11) and the sealing cover A (4) corresponding to the oil injection cavity, and a straight-through type pressure injection oil cup A (8) is arranged on the bearing seat (11) corresponding to the through holes;
the radial labyrinth seal cover (15) is fixedly arranged on the shaft (1), rotates along with the shaft (1) and forms a dynamic seal with the seal cover B (13); the sealing cover B (13), the shaft (1), the bearing (10) and the bearing seat (11) form an oil injection cavity at the other side, a radial through hole is formed in the position, corresponding to the oil injection cavity, of the bearing seat (11), and a straight-through type pressure injection oil cup B (12) is installed on the bearing seat (11) corresponding to the through hole.
2. The single-bearing two-way combination sealing device according to claim 1, wherein: three throttling ring-shaped seal grooves are formed in the surface, in contact with the outer shaft sleeve (2), of the seal cover A (4); three throttling ring-shaped seal grooves are arranged on one surface of the seal cover B (13) which is in contact with the shaft (1).
3. A single-bearing two-way composite seal according to claim 1 or 2, wherein: an O-shaped sealing ring A (3) is arranged between the outer shaft sleeve (2) and the shaft (1), and an O-shaped sealing ring B (16) is arranged between the radial labyrinth sealing cover (15) and the shaft (1).
4. A single-bearing two-way composite seal according to claim 3, wherein: the radial labyrinth seal cover (15) is mounted on the shaft (1) through a set screw (17).
5. The single-bearing two-way combination sealing device according to claim 4, wherein: the sealing cover A (4) is arranged on one side end face of the bearing seat (11) through a connecting bolt (6); and the sealing cover B (13) is arranged on the other end surface of the bearing seat (11) through a connecting bolt (6).
6. The single-bearing two-way combination sealing device according to claim 5, wherein: an oil sealing pad A (5) is arranged between the bearing seat (11) and the sealing cover A (4), and an oil sealing pad B (14) is arranged between the bearing seat (11) and the sealing cover B (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910077109.8A CN111486231A (en) | 2019-01-27 | 2019-01-27 | Single-bearing bidirectional combined sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910077109.8A CN111486231A (en) | 2019-01-27 | 2019-01-27 | Single-bearing bidirectional combined sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111486231A true CN111486231A (en) | 2020-08-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910077109.8A Pending CN111486231A (en) | 2019-01-27 | 2019-01-27 | Single-bearing bidirectional combined sealing device |
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| Country | Link |
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| CN (1) | CN111486231A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113236738A (en) * | 2021-04-09 | 2021-08-10 | 燕山大学 | Salt fog prevention bearing structure |
-
2019
- 2019-01-27 CN CN201910077109.8A patent/CN111486231A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113236738A (en) * | 2021-04-09 | 2021-08-10 | 燕山大学 | Salt fog prevention bearing structure |
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