CN113775648A - Magnetic composite water lubricating rubber bearing with impact resistance - Google Patents
Magnetic composite water lubricating rubber bearing with impact resistance Download PDFInfo
- Publication number
- CN113775648A CN113775648A CN202111069566.6A CN202111069566A CN113775648A CN 113775648 A CN113775648 A CN 113775648A CN 202111069566 A CN202111069566 A CN 202111069566A CN 113775648 A CN113775648 A CN 113775648A
- Authority
- CN
- China
- Prior art keywords
- bearing
- rubber
- magnet unit
- bush
- impact resistance
- 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
Links
Images
Classifications
-
- 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
- F16C32/00—Bearings not otherwise provided for
- F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
- F16C32/0406—Magnetic bearings
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sliding-Contact Bearings (AREA)
Abstract
The invention discloses a magnetic composite type water-lubricated rubber bearing with impact resistance, which solves the problems of poor impact resistance and further improved sealing performance of the existing magnetic composite type water-lubricated rubber bearing. The technical scheme includes that the bearing comprises a bearing metal bushing and a bearing unit sleeved in the bearing metal bushing, wherein the bearing unit consists of an upper magnet unit assembly and a lower water lubrication rubber half bearing bush which are spliced into a complete cylinder; the magnet unit assembly comprises a magnet unit and bearing bush protecting assemblies positioned at two ends of the magnet unit, and the end surfaces of the bearing bush protecting assemblies are flush with the bearing metal bushing; the inner wall of the magnet unit and the space between the magnet unit and the water lubricating rubber half bearing bush are integrally sealed by rubber sealing pieces. The invention has simple structure, easy manufacture and maintenance, long service life and sealing and shock resistance.
Description
Technical Field
The invention relates to the technical field of bearing design, in particular to a magnetic composite water lubricating rubber bearing.
Background
The water lubricating rubber bearing has the advantages of simple structure, low device cost, small heat generation amount under high-speed working conditions, cleanness, no pollution and the like, but also has the defect of low bearing capacity. In recent years, under the rapid development of high-performance rare earth permanent magnetic materials, a product using the permanent magnetic materials to form an auxiliary support component has become a development direction of the design of a water-lubricated rubber bearing product.
The existing magnetic composite water-lubricated rubber bearing considers the problem of sealing more, and the water-lubricated rubber bearing adopted by a ship tail shaft system is often in the seawater environment outside a cabin, so that the shaft system can be subjected to various impacts, and the impacts can damage permanent magnets to demagnetize the permanent magnets, so that the permanent magnets lose effects.
Such as: patent CN201922020392.9 discloses a marine permanent magnet suspension support water lubricated bearing, which utilizes the permanent magnet inside the stator to provide upward magnetic attraction force to the rotating shaft, reduces the pressure of the rotating shaft to the bearing, utilizes the gasket arranged between the end cover and the stator to realize sealing between the end cover and the stator, but does not consider the problem of impact resistance.
Patent CN201920936149.9 discloses a permanent magnet auxiliary support type water lubricated bearing, comprising: the bearing comprises a bearing shell, a magnet unit, a water lubrication bearing body and a bearing end cover; the permanent magnet is positioned in the mounting groove of the water lubrication bearing body and is hermetically connected with other parts of the equipment by utilizing the bearing end cover; the water lubrication bearing body and the bearing end cover form a liquid isolation layer, so that corrosive liquid can be thoroughly isolated from the permanent magnet, and the service life of the permanent magnet is prolonged. This solution also does not take into account the problem of impact resistance.
In practical application, if an anti-impact protection structure is not provided for the permanent magnet, when the propeller shafting is impacted at various moments, the collision between the rotating shaft and the permanent magnet can cause the permanent magnet to be demagnetized and even broken and demagnetized, thereby influencing the function of the permanent magnet for absorbing the weight of the rotating shaft, and therefore, the technical scheme is only suitable for the shafting support in the cabin in practical application.
Disclosure of Invention
The invention aims to solve the technical problems and provides the magnetic composite water lubricating rubber bearing with the shock resistance, which has the advantages of simple structure, easiness in manufacturing and maintenance, long service life and sealing and shock resistance.
The technical scheme includes that the bearing comprises a bearing metal bushing and a bearing unit sleeved in the bearing metal bushing, wherein the bearing unit consists of an upper magnet unit assembly and a lower water lubrication rubber half bearing bush which are spliced into a complete cylinder; the magnet unit assembly comprises a magnet unit and bearing bush protecting assemblies positioned at two ends of the magnet unit, and the end surfaces of the bearing bush protecting assemblies are flush with the bearing metal bushing; the inner wall of the magnet unit and the space between the magnet unit and the water lubricating rubber half bearing bush are integrally sealed by rubber sealing pieces.
The cross section of the magnet unit assembly is in a sector shape or a semi-annular shape.
The bearing bush protection component consists of an outer end metal lining bush and an inner end rubber bearing bush.
The surface height of the end rubber bearing bush is higher than that of the rubber sealing sheet.
The thickness of the end rubber bearing bush is required to meet the requirement that the surface height of the end rubber bearing bush can be still higher than that of the rubber sealing sheet after the end rubber bearing bush is impacted.
The rubber material of the end rubber bearing bush meets the requirements that the abrasion rate is not more than 0.1mm/h and the impact strength is not less than 20KJ/m2。
And two ends of the rubber sealing sheet are bent downwards and inserted into a gap between the water lubricating rubber half bearing bush and the bearing metal bushing.
The water lubricating rubber half bearing bush consists of an outer layer of metal lining bush and an inner layer of rubber bearing bush.
In view of the problems in the background art, the inventors made the following improvements:
(1) the upper magnet unit assembly and the lower water lubrication rubber half bearing bush are spliced into a complete cylinder, the inner wall of the magnet unit and the integral sealing between the magnet unit and the water lubrication rubber half bearing bush are realized by using the rubber sealing sheet, and the magnet unit is wrapped and limited at the same time, so that seawater is prevented from leaking into the magnet unit assembly from the rotating shaft and the water lubrication rubber half bearing bush, and the radial sealing effect is ensured; and bearing bush protection assemblies are arranged at two ends of the magnet unit, and the bearing bush protection assemblies are utilized to realize the axial upward sealing of the magnet unit. Preferably, two ends of the rubber sealing sheet are bent downwards and inserted into a gap between the water lubricating rubber half bearing bush and the bearing metal bushing, so that seawater can be effectively prevented from leaking into the magnet unit from the gap, and meanwhile, a pressing force is applied to the rubber sealing sheet in a bending and inserting mode, so that the sealing performance is further improved, and the problem of expansion caused by heat and contraction caused by cold or deformation caused by acting force is avoided.
(2) The bearing bush protection assembly is composed of an outer end metal lining bush and an inner end rubber bearing bush, wherein the end metal lining bush plays a role in rigid support, the end rubber bearing bush has elasticity, and when the shafting is impacted in various moments, all impact force can be absorbed by the end rubber bearing bushes at two ends due to the fact that the surface height of the end rubber bearing bush is higher than that of the rubber sealing sheet, so that collision between a magnet unit (namely a permanent magnet) and a rotating shaft can be well avoided, the magnet unit is better protected from being influenced by the impact force, and the service life of the magnet unit is greatly prolonged. And because both the end metal bushing and the end rubber bushing are positioned at the two ends, the maintenance or the replacement can be conveniently carried out. Preferably, the thickness of the end rubber bearing bush is required to meet the requirement that the surface height of the end rubber bearing bush can still be ensured to be higher than that of the rubber sealing sheet after being impacted, and the material is required to meet the requirements that the abrasion rate is not more than 0.1mm/h and the impact strength is not less than 20KJ/m2More preferably, a low noise nano/polymer composite material described in patent No. CN201110271115.0, which has low noise, low friction coefficient, low abrasion, long life and excellent impact resistance, can be used.
The invention has simple structure, easy manufacture and maintenance, long service life and excellent sealing and shock resistance.
Drawings
FIG. 1 is an axial cross-sectional view of the present invention.
Fig. 2 is a partially enlarged view of a portion a in fig. 1.
Fig. 3 is a radial cross-sectional view of the present invention.
Wherein, 1-bearing metal bush, 2-metal bush, 3-water lubrication rubber half bush, 4-end metal bush, 5-end rubber bush, 6-magnet unit, 7-rubber sealing piece, 7.1-arch section, 7.2-plane section and 7.3-bending section.
Detailed Description
The invention is further explained below with reference to the drawings in which:
referring to fig. 1, the invention comprises a bearing metal bushing 1 and a bearing unit sleeved in the bearing metal bushing, wherein the bearing unit consists of an upper magnet unit assembly and a lower water lubrication rubber half bush 3 which can be spliced into a complete cylinder;
the magnet unit assembly comprises a magnet unit 6 (namely a permanent magnet) and bearing bush protection assemblies positioned at two ends of the magnet unit 6, and the end surfaces of the bearing bush protection assemblies are flush with the bearing metal bushing 1; the inner wall of the magnet unit 6 and the end surfaces of the magnet unit 6 and the water lubricating rubber half bearing bush 3 are integrally sealed by a rubber sealing sheet 7
Referring to fig. 1, the bushing protector assembly is composed of an outer end metal bushing 4 and an inner end rubber bushing 5, wherein the end metal bushing 4 is fixedly connected (e.g. bolted) to the bearing metal bushing 1; preferably, referring to fig. 2, the surface height of the end rubber bush 5 is higher than the surface height of the rubber sealing sheet 7. The thickness of the end rubber bearing bush 5 is enough to meet the requirement that the surface height of the end rubber bearing bush 5 is higher than that of the rubber sealing sheet 7 after being impacted. Preferably, the rubber material of the end rubber bearing shell 5 meets the requirements of abrasion rate not more than 0.1mm/h and impact strength not less than 20KJ/m2. Further, a low-noise nano/polymer composite material described in patent No. CN201110271115.0 is preferably used. The water lubrication rubber half bearing bush is composed of an outer layer metal lining bush 2 and an inner layer rubber bearing bush 3, wherein the metal lining bush 2 is fixedly connected with a bearing metal lining 1 (such as connected by a bolt).
Referring to fig. 3, the cross section of the magnet unit assembly is in a sector shape or a semi-annular shape, and a person skilled in the art selects an acceptable magnet unit according to needs and adapts to a correspondingly-shaped bush guard assembly. The rubber sealing sheet 7 is formed by pressing integrally and comprises an arch section 7.1 covering the magnet unit 6, a plane section 7.2 positioned between the magnet unit 6 and the end surface of the water lubricating rubber half bush 3 and positioned at two sides of the arch section 7.1, and a bending section 7.3 bent downwards and inserted into a gap between the metal lining bush 2 and the bearing metal bush 1, and the purpose of efficient integrated sealing and preheating deformation failure is realized through the rubber sealing sheet 7 with the structure.
Comparative experiment:
a comparative test of the impact resistance of the magnet unit with the end-free pad protection assembly of the magnetic composite water lubricated bearing and a comparative test of the corrosion resistance with or without the rubber sealing piece were carried out.
After the magnetic composite water lubricated bearing sealed by the rubber sealing sheet 7 (in the embodiment of the application) and the magnetic composite water lubricated bearing sealed by the rubber sealing sheet 7 without the rubber sealing sheet are soaked in seawater for 45 days, the magnetic force generated by the magnet unit is measured, the result is shown in the following table, the magnetic force of the magnet unit without the rubber sealing sheet before and after the seawater is soaked is attenuated by 10KN, the magnetic force of the magnet unit with the rubber sealing sheet is only attenuated by 0.5KN, and the result shows that the rubber sealing sheet can protect the magnet unit from being attenuated under the corrosive environment.
| Front bearing magnetic force of soaking seawater (kN) | Magnetic force of bearing after soaking seawater (kN) | |
| With sealing | 30 | 29.5 |
| Without sealing | 30 | 20 |
The impact device generates 20KN radial impact force to be respectively applied to the magnet units of the magnetic composite type water lubrication bearing with the end protection component (the embodiment of the application) and the magnet unit without the end protection component, the magnetic force generated by the magnet unit is measured after impact, the results are shown in the following table, the magnetic force of the magnet unit without the end protection component is reduced by 14KN, the magnetic force of the magnet unit with the end protection component is not reduced, and the results show that the end protection component can protect the magnet unit from magnetic force reduction under radial impact.
| Magnetic force of impact front bearing (kN) | Magnetic force of rear impact bearing (kN) | |
| With protective members | 30 | 30 |
| Unprotected assembly | 30 | 16 |
Claims (8)
1. A magnetic composite water-lubricated rubber bearing with impact resistance comprises a bearing metal bush and a bearing unit sleeved in the bearing metal bush, and is characterized in that the bearing unit consists of an upper magnet unit assembly and a lower water-lubricated rubber half bush which are spliced into a complete cylinder; the magnet unit assembly comprises a magnet unit and bearing bush protecting assemblies positioned at two ends of the magnet unit, and the end surfaces of the bearing bush protecting assemblies are flush with the bearing metal bushing; the inner wall of the magnet unit and the space between the magnet unit and the end rubber bearing bush are integrally sealed by rubber sealing pieces.
2. A magnetic composite type water-lubricated rubber bearing with impact resistance according to claim 1, wherein the magnet unit assembly is fan-shaped or semi-annular in cross section.
3. A magnetic composite type water lubricated rubber bearing with impact resistance according to claim 1 or 2 wherein said pad protection assembly is composed of an outer layer of end metal pads and an inner layer of end rubber pads.
4. A magnetic composite type water lubricated rubber bearing with impact resistance as claimed in claim 3, wherein the surface height of said end rubber bush is higher than the surface height of said rubber sealing plate.
5. A magnetic composite type water-lubricated rubber bearing with impact resistance as claimed in claim 4, wherein the thickness of the end rubber bush is such that the surface height of the end rubber bush is higher than that of the rubber sealing sheet after impact.
6. A magnetic composite type water-lubricated rubber bearing with impact resistance according to claim 4 or 5, wherein the rubber material of the end rubber bearing shell satisfies the requirements of abrasion rate not more than 0.1mm/h and impact strength not less than 20KJ/m2。
7. A magnetic composite type water lubricated rubber bearing with impact resistance as claimed in claim 1, wherein both ends of said rubber sealing plate are bent downward and inserted into the gap between the water lubricated rubber half bearing shell and the metal bush of the bearing.
8. A magnetic composite type water lubricated rubber bearing with impact resistance as claimed in claim 1, wherein said water lubricated rubber half bearing shell is composed of an outer layer of metal lining shell and an inner layer of rubber bearing shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111069566.6A CN113775648A (en) | 2021-09-13 | 2021-09-13 | Magnetic composite water lubricating rubber bearing with impact resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111069566.6A CN113775648A (en) | 2021-09-13 | 2021-09-13 | Magnetic composite water lubricating rubber bearing with impact resistance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113775648A true CN113775648A (en) | 2021-12-10 |
Family
ID=78843405
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111069566.6A Pending CN113775648A (en) | 2021-09-13 | 2021-09-13 | Magnetic composite water lubricating rubber bearing with impact resistance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113775648A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114688158A (en) * | 2022-02-24 | 2022-07-01 | 中国船舶重工集团公司第七一九研究所 | Magnetic-water combined type stern bearing and ship propulsion system for improving unbalance loading effect |
| CN115479774A (en) * | 2022-10-12 | 2022-12-16 | 大连理工大学 | Water lubrication bearing experiment table of electromagnetic auxiliary bearing |
-
2021
- 2021-09-13 CN CN202111069566.6A patent/CN113775648A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114688158A (en) * | 2022-02-24 | 2022-07-01 | 中国船舶重工集团公司第七一九研究所 | Magnetic-water combined type stern bearing and ship propulsion system for improving unbalance loading effect |
| CN115479774A (en) * | 2022-10-12 | 2022-12-16 | 大连理工大学 | Water lubrication bearing experiment table of electromagnetic auxiliary bearing |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113775648A (en) | Magnetic composite water lubricating rubber bearing with impact resistance | |
| CN102042330A (en) | Laths combined type water-lubricated rubber alloy bearing | |
| CN216045019U (en) | Magnetic composite water lubricating rubber bearing with impact resistance | |
| CN101311584A (en) | Shock resistance axial seal device for screw shaft of ship | |
| CN112252089A (en) | Rail damper | |
| CN208571818U (en) | A kind of motor with vibration absorber | |
| CN101749267A (en) | Spent fuel water tank cooling pump of pressure water reactor nuclear power plant | |
| CN205154485U (en) | Sealed lid of generator guide bearing oil pan | |
| CN207598560U (en) | A kind of sea water desalination booster pump bearing assembly device | |
| CN110242669B (en) | Permanent magnet auxiliary support type water lubrication bearing and marine transportation equipment | |
| CN211715545U (en) | Marine permanent magnet suspension support water-lubricated bearing | |
| CN112178097B (en) | Large overload shock absorber | |
| CN201487436U (en) | Novel rotary joint | |
| CN201176260Y (en) | Shock resistance axial seal device for screw shaft of ship shock resistance type axial seal device for stern shaft of shipping | |
| CN210461399U (en) | Permanent magnet auxiliary support type water lubrication bearing and ocean transportation equipment | |
| CN202628204U (en) | Turbine cooler with combined damper | |
| CN212615928U (en) | Lining structure for shaft of supercharged engine | |
| CN212342969U (en) | Shaft end grounding device for metro vehicle | |
| CN201461958U (en) | Floating metal cellular seal | |
| CN101413425A (en) | Intermediate body assembly for turbocharger | |
| CN216238088U (en) | Viscous damper vibration damper for bridge | |
| CN216666466U (en) | Polytetrafluoroethylene sealing gasket | |
| CN216922985U (en) | Elastic roller wheel used in impact vibration and friction environment | |
| CN219570617U (en) | Graphite bearing | |
| CN217207480U (en) | Telescopic sealing type viscous damper |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |