CN112727919A - Ultra-heavy-load water-lubricated sliding thrust bearing and manufacturing method thereof - Google Patents
Ultra-heavy-load water-lubricated sliding thrust bearing and manufacturing method thereof Download PDFInfo
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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
- F16C27/00—Elastic or yielding bearings or bearing supports, for exclusively rotary movement
- F16C27/02—Sliding-contact bearings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/003—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass bearings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B11/00—Parts or details not provided for in, or of interest apart from, the preceding groups, e.g. wear-protection couplings, between turbine and generator
- F03B11/06—Bearing arrangements
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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
- F16C27/00—Elastic or yielding bearings or bearing supports, for exclusively rotary movement
- F16C27/08—Elastic or yielding bearings or bearing supports, for exclusively rotary movement primarily for axial load, e.g. for vertically-arranged shafts
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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
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
- F16C33/043—Sliding surface consisting mainly of ceramics, cermets or hard carbon, e.g. diamond like carbon [DLC]
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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
- F16N—LUBRICATING
- F16N15/00—Lubrication with substances other than oil or grease; Lubrication characterised by the use of particular lubricants in particular apparatus or conditions
- F16N15/04—Lubrication with substances other than oil or grease; Lubrication characterised by the use of particular lubricants in particular apparatus or conditions with water
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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
- F16C2326/00—Articles relating to transporting
- F16C2326/30—Ships, e.g. propelling shafts and bearings therefor
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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
- F16C2380/00—Electrical apparatus
- F16C2380/26—Dynamo-electric machines or combinations therewith, e.g. electro-motors and generators
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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
- F16N—LUBRICATING
- F16N2210/00—Applications
- F16N2210/14—Bearings
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Ceramic Engineering (AREA)
- Sliding-Contact Bearings (AREA)
Abstract
The invention discloses an overload water lubrication sliding thrust bearing and a manufacturing method thereof, wherein the manufacturing method comprises the following steps: preparing a hard alloy substrate; sintering the diamond micro powder on the hard alloy substrate to form a polycrystalline diamond layer, wherein the polycrystalline diamond layer and the hard alloy layer form a double-layer composite structure; polishing the surface of the diamond layer; cutting a thrust ring and a thrust tile ring on the double-layer composite structure, wherein the hard alloy substrate of the double-layer composite structure forms a first substrate layer and a second substrate layer, and the polycrystalline diamond layer formed by sintering forms a first working layer and a second working layer; cutting a water tank on the thrust pad ring to form a thrust pad; and a buffer pad is additionally arranged on the outer side surface of the first substrate layer and/or the second substrate layer. The invention has the beneficial effects that: the thrust pads are formed after the water tank is cut on the whole polycrystalline diamond composite structure, the height difference of each thrust pad is small, and the flatness precision is high; the thrust pad has no welding process, does not generate high temperature and high pressure, and effectively avoids the risk of graphitizing diamond; meanwhile, the water lubrication sliding thrust bearing cut in a whole block has ultrahigh bearing capacity and wear resistance.
Description
Technical Field
The invention relates to a thrust bearing, in particular to an ultra-heavy load water lubrication sliding thrust bearing and a manufacturing method thereof.
Background
Currently, in the field of marine underwater propulsion or tidal power generation, the load-carrying performance and service life of water lubricated thrust bearings have become the bottleneck technology limiting the power boost and large-scale application of these devices. On one hand, the low viscosity of water causes the weak bearing capacity of the water-lubricated bearing, the bearing area of the water-lubricated bearing is far larger than that of an oil-lubricated bearing with the same bearing capacity, and the increase of the bearing area means that the flow area of a power element of a propeller or a tidal power generator is reduced, and the hydrodynamic performance is reduced; on the other hand, materials such as rubber, high molecular polymer, nylon, laminated plates and the like are generally adopted in the current water-lubricated bearing, and the materials can quickly lose effectiveness due to abrasion in a silt water environment. Therefore, the development of a water-lubricated bearing having high load-bearing capacity and wear resistance is the key to solving the above problems.
The polycrystalline diamond material has ultrahigh hardness, wear resistance and better heat conductivity coefficient, so that the polycrystalline diamond material is suitable for developing a water-lubricated thrust bearing with ultrahigh bearing capacity. At present, the granted and published Chinese patents related to sliding thrust bearings developed by polycrystalline diamond materials include "diamond sliding thrust bearing" (application No. 2014202443508, publication No. CN 203835953U); foreign patents include BEARING ASSEMBLIES, AND BEARING APPATATUSES AND MOTOR ASSEMBLIES USE SAME (US20120255789A 1); BEARING ELEMENTS, BEARING ASSEMBLIES, AND RELATED METHODS (US20130182980A 1); (metals OF OPERATING A BEARING applying recording TILTING PADS) (US20140355914A 1); TILTING PAD BEARING ASSEMBLIES, AND BEARING APPATUSES AND METHODS OF USE THE SAME (US20200347877A1), etc. However, the thrust ring of the sliding thrust bearing or the thrust shoe on the thrust shoe ring is formed by welding a plurality of polycrystalline diamond compacts on the support ring, and because the dimensional consistency of each polycrystalline diamond compact cannot be ensured, the flatness tolerance of the working surface of the thrust ring or the thrust shoe ring is large, and the height difference of the working surface of each polycrystalline diamond compact is usually greater than 10 μm; when the composite sheets are heated unevenly, the thermal expansion amount of the composite sheets is inconsistent, and the height difference is further increased, so that when the thrust ring rotates relative to the thrust shoe ring, part of polycrystalline diamond composite sheets on the surfaces of the thrust ring and the thrust shoe ring can collide or block, structural vibration, abnormal friction noise and even mechanical faults are induced, the reliability and the mute performance of equipment are reduced, and especially in occasions with higher requirements on friction vibration and noise, the thrust bearing welded by the polycrystalline diamond composite sheets cannot be used.
Disclosure of Invention
The invention aims to provide an overload water lubrication sliding thrust bearing and a manufacturing method thereof aiming at the defects of the prior art, and solves the problem that the bearing performance is influenced by poor consistency of thrust pads and large height difference of the thrust pads in the existing thrust bearing mechanism.
The technical scheme adopted by the invention is as follows: the super-heavy-load water-lubricated sliding thrust bearing comprises a thrust ring and a thrust shoe ring which are coaxially arranged, wherein the thrust ring is connected with a rotating shaft and rotates along with the rotating shaft; the thrust ring comprises a first substrate layer and a first working layer which are bonded into a whole, and the first substrate layer and the first working layer are both of circular ring structures; the thrust bearing ring is connected with the fixed base and comprises a second substrate layer and a second working layer, the second substrate layer and the second working layer are both of circular ring structures, and the second working layer is opposite to the first working layer; a plurality of water channels for cooling water to flow through are axially and uniformly arranged on the outer surface of the second working layer at intervals, and the water channels are communicated with the inner ring and the outer ring of the second working layer; the convex part between two adjacent water tanks is a thrust tile, and the surface of the working surface of the thrust tile is matched with the working surface of the first working layer to form a friction pair for bearing axial force.
According to the scheme, the first basal layer and the second basal layer are both made of hard alloy, and the first working layer and the second working layer are both made of polycrystalline diamond.
According to the scheme, the water tank is a rectangular tank, a crescent groove, a spiral groove or a fan-shaped groove.
According to the scheme, the buffer pads are additionally arranged on the outer side surfaces of the first substrate layer and/or the second substrate layer.
According to the scheme, the cushion pad is made of elastic materials.
The invention also provides a manufacturing method of the overload water lubrication sliding thrust bearing, which comprises the following steps:
step one, preparing a hard alloy substrate;
sintering the diamond micro powder on the hard alloy substrate to form a polycrystalline diamond layer, wherein the polycrystalline diamond layer and the hard alloy layer form a double-layer composite structure;
step three, polishing the surface of the polycrystalline diamond layer;
cutting a thrust ring and a thrust shoe ring on the double-layer composite structure, wherein the hard alloy substrate of the double-layer composite structure forms a first substrate layer and a second substrate layer, and the polycrystalline diamond layer formed by sintering forms a first working layer and a second working layer;
step five, cutting water grooves on the thrust pad ring, wherein the protruding part between every two adjacent water grooves is a thrust pad;
and step six, adding a cushion pad installation cushion pad on the outer side surface of the first substrate layer and/or the second substrate layer.
According to the scheme, the specific method of the step two comprises the following steps: and under the high-temperature and high-pressure environment, pressing by using a cubic press, and sintering the diamond micro powder on a hard alloy substrate under the action of binder cobalt to form a polycrystalline diamond layer to form a double-layer composite structure.
According to the scheme, the temperature of the high-temperature and high-pressure environment is 1450-1500 ℃, and the pressure is 5.5-6 GPa.
According to the scheme, in the fifth step, the water tank is machined on the complete continuous upper surface of the second working layer by adopting a laser cutting or linear cutting method, and the cross section shape of the water tank is matched with the working condition of the bearing and the water flow direction.
The invention has the beneficial effects that:
1. the risk of graphitizing the thrust pad diamond is reduced. In the traditional polycrystalline diamond sliding thrust bearing, polycrystalline diamond forming a thrust tile is arranged on a support ring through a welding method, and the polycrystalline diamond is easily converted into graphite through high temperature generated in the welding process, so that the reliability of a product is influenced; the thrust shoe in the sliding thrust bearing is formed after the water tank is cut on the whole polycrystalline diamond composite structure, so that the welding process is avoided, high temperature and high pressure are not generated, and the risk of graphitizing polycrystalline diamond is effectively avoided; meanwhile, the water lubrication sliding thrust bearing which is cut in a whole block has ultrahigh bearing capacity and wear resistance, and is particularly suitable for ship underwater shaftless rim driving propellers and tidal power generators.
2. The height difference of the thrust bearing is extremely small, and the consistency is good: according to the invention, the thrust pads are formed by cutting the polished polycrystalline diamond layer, the height difference of each thrust pad can be as small as 0.1 μm, so that the bearing capacity of each pad in work can be ensured to be uniform, the thermal expansion and contraction performance consistency of the thrust pads is good, the thermal expansion amount or the cold contraction amount is uniform, abnormal abrasion of the thrust pads due to large local contact pressure caused by large height difference can be avoided, or collision or blockage between the thrust ring and the polycrystalline diamond compact of the thrust pads on the thrust pad ring in the prior art can be avoided, and the friction noise and induced structural vibration of the conventional bearing are obviously reduced.
3. The manufacturing process of the bearing is simplified, and the surface size precision of the bearing is improved. In the traditional sliding thrust bearing based on the polycrystalline diamond compact, grinding is carried out after all the compacts are welded in the manufacturing process so as to reduce the flatness error and the surface roughness of a working surface; because the height difference of the composite sheet is large, the bearing needs to be ground in carborundum for several hours to tens of hours, the product development period is long, the cost is high, the ground surface quality is low, and the defective rate is high. The sliding thrust bearing provided by the invention firstly grinds the whole double-layer composite structure for several hours, so that the surface flatness and roughness of the sliding thrust bearing meet the requirements, and then the sliding thrust bearing is cut into the thrust ring or the thrust shoe ring, the surface quality of the bearing after cutting meets the requirements, the height difference of the thrust shoe ring is extremely small, secondary processing is not needed, the surface quality is high, and the development efficiency is high.
4. Set up the blotter and improve shock resistance: according to the invention, the cushion pad made of elastic metal or nonmetal material is selectively arranged on the substrate layer of the thrust ring and/or the thrust shoe ring, so that the shock resistance of the bearing is improved, the local contact stress of the bearing can be reduced, and the bearing can have certain deformation coordination and load balancing capacity when being applied to the shaft inclination working condition.
5. The invention has reasonable structure design and simple manufacturing process.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Fig. 2 is a cross-sectional view taken along line a-a of fig. 1.
Fig. 3 is a schematic structural diagram of the thrust collar in this embodiment.
FIG. 4 is a schematic view of a thrust shoe ring having a rectangular groove.
FIG. 5 is a schematic view of a thrust shoe ring having a crescent-shaped groove.
FIG. 6 is a schematic view of a cushion mounted thrust shoe ring with spiral grooves.
In the figure: 1. a thrust ring; 1-1, a first substrate layer; 1-2, a first working layer; 1-3, a first working layer working surface; 2. a thrust shoe ring; 2-1, a second substrate layer; 2-2, a second working layer; 2-3, a water tank; 2-4, thrust pads; 2-5, a thrust pad working surface; 3. a cushion pad.
Detailed Description
For a better understanding of the present invention, reference is made to the following examples and accompanying drawings.
The super-heavy-load water-lubricated sliding thrust bearing as shown in fig. 1 and fig. 2 comprises a thrust ring 1 and a thrust shoe ring 2 which are coaxially arranged, wherein the thrust ring 1 is connected with a rotating shaft and rotates along with the rotating shaft; the thrust ring 1 comprises a first substrate layer 1-1 and a first working layer 1-2 which are bonded into a whole, and the first substrate layer 1-1 and the first working layer 1-2 are both in a circular ring structure, as shown in fig. 3; the thrust tile ring 2 is connected with the fixed base, the thrust tile ring 2 comprises a second substrate layer 2-1 and a second working layer 2-2, the second substrate layer 2-1 and the second working layer 2-2 are both in a circular ring structure, and the second working layer 2-2 is opposite to the first working layer 1-2; a plurality of water tanks 2-3 for cooling water to flow through are axially and uniformly arranged on the outer surface of the second working layer 2-2 at intervals, and the water tanks 2-3 are communicated with the inner ring and the outer ring of the second working layer 2-2; the convex part between two adjacent water tanks 2-3 is a thrust pad 2-4, and the working surface 2-5 of the thrust pad is matched with the working surface 1-3 of the first working layer to form a friction pair for bearing axial force.
Preferably, the first substrate layer 1-1 and the second substrate layer 2-1 are both made of cemented carbide, and the first working layer 1-2 and the second working layer 2-2 are both made of polycrystalline diamond.
Preferably, a buffer pad 3 is additionally arranged on the outer side surface of the first substrate layer 1-1 and/or the second substrate layer 2-1, and is used for slowing down the transmission of axial impact load or local contact stress of a polycrystalline diamond friction surface, and improving the shock resistance and vibration reduction performance of the support.
In the invention, the cushion pad 3 is made of elastic material, and can be made of metal material or non-metal material; the concrete material selection of the buffer cushion 3 is determined according to the specific pressure of the bearing, when the specific pressure exceeds 10 MPa, elastic metal materials are preferably selected, and when the specific pressure is less than 10 MPa, non-metal materials such as hard rubber, nylon, plastics and the like can be used.
Preferably, the water tank 2-3 is a rectangular tank, as shown in fig. 4, and the length direction of each rectangular tank is consistent with the radial direction of the second working layer 2-2. The water tanks 2-3 can also be in the shapes of crescent grooves (as shown in figure 5), spiral grooves (as shown in figure 6) or fan-shaped grooves. In the invention, the specific shape of the water tank 2-3 is not limited to the above-mentioned ones, and the selection type of the water tank needs to be determined by comprehensively considering the working condition of the bearing, the working water environment and other factors: the bearing with lower requirement on bearing performance can adopt a rectangular groove, and can adopt a spiral groove or a crescent groove when the requirement on bearing capacity is higher so as to enhance the lubricating effect of the bearing. The number of the water tanks 2-3 of the single thrust pad ring 2 is not less than 4, and the actual number of the water tanks is determined after calculation according to the flow rate of cooling water and the friction heat generation amount.
A method of manufacturing an overload water-lubricated sliding thrust bearing as described above, the method comprising the steps of:
step one, preparing a hard alloy substrate;
sintering the diamond micro powder on the hard alloy substrate to form a polycrystalline diamond layer, wherein the polycrystalline diamond layer and the hard alloy substrate form a double-layer composite structure: under the high-temperature and high-pressure environment, pressing by using a cubic press, sintering the diamond micro powder on a hard alloy substrate under the action of binder cobalt to form a polycrystalline diamond layer, wherein the polycrystalline diamond layer and the hard alloy substrate form a double-layer composite structure; in the invention, the temperature of the high-temperature and high-pressure environment is 1450-1500 ℃, and the pressure is 5.5-6 GPa;
step three, polishing the surface of the polycrystalline diamond layer to ensure that the surface roughness meets the requirement and has a mirror surface effect: grinding and polishing the surface of the polycrystalline diamond layer with the double-layer composite structure on a grinding machine by using carborundum to ensure that the flatness of the polycrystalline diamond layer is less than 1 mu m and the surface roughness is less than 0.1 mu m;
step four, cutting the thrust ring 1 and the thrust tile ring 2 on the double-layer composite structure: cutting two circular ring structures meeting the size requirement on the double-layer composite structure to be respectively used as a thrust ring 1 and a thrust tile ring 2; the hard alloy substrate with the double-layer composite structure forms a first substrate layer 1-1 and a second substrate layer 2-1, and a polycrystalline diamond layer formed by sintering forms a first working layer 1-2 and a second working layer 2-2;
step five, cutting water grooves 2-3 on the thrust pad ring 2, wherein the convex part between every two adjacent water grooves 2-3 is a thrust pad 2-4: and processing the water tank 2-3 on the second working layer 2-2 by adopting a laser cutting or linear cutting method, wherein the cross section shape of the water tank 2-3 is matched with the working condition of the bearing and the water flow direction. For the bearing with lower bearing performance requirement, a water tank 2-3 structure with a rectangular tank can be adopted; when the bearing capacity requirement is high, the structural design of the water tank 2-3 with a spiral groove or a crescent groove can be adopted to enhance the lubricating effect of the bearing;
step six, adding a buffer pad 3 on the outer side surface of the first substrate layer 1-1 and/or the second substrate layer 2-1: and the buffer pad 3 is bonded on the outer surface of the hard alloy substrate of the thrust ring 1 or the thrust shoe ring 2 and used for slowing down the transmission of axial impact load or reducing the local contact stress of the friction surface of the polycrystalline diamond and improving the shock resistance and vibration reduction performance of the support.
Typically, the thrust collar 1 is mounted directly on the rotating shaft, or indirectly on the rotating shaft through the cushion pad 3, and rotates with the rotating shaft, and the thrust shoe collar 2 is mounted directly on the fixed base, or indirectly on the fixed base through the cushion pad 3. When the thrust bearing is in work, the thrust ring 1 rotates and transmits the axial force to the thrust shoe working surfaces 2-5 through the first working layer working surfaces 1-3, and the thrust shoe ring 2 transmits the axial force to the base to complete the transmission of the axial force from the rotating part to the static part. Cooling water flows into or out of the thrust pad ring 2 through the water groove 2-3 on the thrust pad ring 2 to lubricate the friction surface and take away friction heat. When the rotation axis of the thrust collar 1 is inclined relative to the thrust shoe collar 2, the thrust bearing may be changed from the contact bearing of the two friction surfaces to the local point contact bearing, so that the local stress is too large, the bearing is damaged, and at this time, the cushion pad 3 will function, so that the thrust collar 1 and the thrust shoe collar 2 generate a slight retraction amount along the axial direction at the position where the local contact stress is large, and the local contact stress is reduced. In addition, when the rotating shaft has impact load, the cushion pad 3 can absorb part of vibration energy due to certain damping, reduce vibration transmission and play a role in vibration reduction and isolation.
Through tests, the maximum bearing specific pressure of the sliding thrust bearing exceeds 100 MPa, the service life calculated according to the unit time abrasion loss under the super-heavy load working condition is longer than 3 ten thousand hours, and both the bearing capacity and the service life of the sliding thrust bearing are far longer than those of the existing water lubrication sliding thrust bearing.
It should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention, and the present invention is not limited thereto, and although the present invention has been described in detail with reference to the embodiments, it will be apparent to those skilled in the art that modifications can be made to the technical solutions described in the above-mentioned embodiments, or equivalent substitutions of some technical features, but any modifications, equivalents, improvements and the like within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims (9)
1. The super-heavy-load water-lubricated sliding thrust bearing is characterized by comprising a thrust ring and a thrust shoe ring which are coaxially arranged, wherein the thrust ring is connected with a rotating shaft and rotates along with the rotating shaft; the thrust ring comprises a first substrate layer and a first working layer which are bonded into a whole, and the first substrate layer and the first working layer are both of circular ring structures; the thrust bearing ring is connected with the fixed base and comprises a second substrate layer and a second working layer, the second substrate layer and the second working layer are both of circular ring structures, and the second working layer is opposite to the first working layer; a plurality of water channels for cooling water to flow through are axially and uniformly arranged on the outer surface of the second working layer at intervals, and the water channels are communicated with the inner ring and the outer ring of the second working layer; the convex part between two adjacent water tanks is a thrust tile, and the surface of the working surface of the thrust tile is matched with the working surface of the first working layer to form a friction pair for bearing axial force.
2. The super heavy duty water-lubricated sliding thrust bearing according to claim 1, wherein said first and second substrate layers are made of cemented carbide and said first and second working layers are made of polycrystalline diamond.
3. The super heavy duty water lubricated sliding thrust bearing of claim 2 wherein said water groove is a rectangular groove, a crescent groove, a spiral groove or a fan groove.
4. The super heavy duty water lubricated sliding thrust bearing of claim 2 wherein said first substrate layer and/or said second substrate layer has added to the outer side surface a cushion pad.
5. The super heavy duty water lubricated sliding thrust bearing according to claim 4 wherein said cushion is made of an elastomeric material.
6. A method for manufacturing the ultra-heavy load water-lubricated sliding thrust bearing according to any one of claims 2 to 5, wherein the method comprises the following steps:
step one, preparing a hard alloy substrate;
sintering the diamond micro powder on the hard alloy substrate to form a polycrystalline diamond layer, wherein the polycrystalline diamond layer and the hard alloy layer form a double-layer composite structure;
step three, polishing the surface of the polycrystalline diamond layer;
cutting a thrust ring and a thrust shoe ring on the double-layer composite structure, wherein the hard alloy substrate of the double-layer composite structure forms a first substrate layer and a second substrate layer, and the polycrystalline diamond layer formed by sintering forms a first working layer and a second working layer;
step five, cutting water grooves on the thrust pad ring, wherein a bulge between every two adjacent water grooves is a thrust pad;
and step six, adding a cushion pad installation cushion pad on the outer side surface of the first substrate layer and/or the second substrate layer.
7. The method for manufacturing the extra heavy load water-lubricated sliding thrust bearing according to claim 6, wherein the specific method in the second step is as follows: under the high-temperature and high-pressure environment, a cubic press is used for pressing, and the diamond micro powder is sintered on the hard alloy substrate under the action of binder cobalt to form a diamond layer, so that a double-layer composite structure is formed.
8. The method of claim 7, wherein the temperature of the high temperature and high pressure environment is 1450-1500 ℃, and the pressure is 5.5-6 GPa.
9. The method for manufacturing an overload water-lubricated sliding thrust bearing according to claim 6, wherein in the fifth step, a water groove is formed on the continuous and complete upper surface of the second working layer by laser cutting or linear cutting, and the cross-sectional shape of the water groove is adapted to the working conditions of the bearing and the water flow direction.
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| CN202011470337.0A CN112727919A (en) | 2020-12-14 | 2020-12-14 | Ultra-heavy-load water-lubricated sliding thrust bearing and manufacturing method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113494523A (en) * | 2021-07-14 | 2021-10-12 | 武汉理工大学 | Heavy-load point-supported elastic tilting-pad water-lubricated sliding thrust bearing |
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