CN113494523A - Heavy-load point-supported elastic tilting-pad water-lubricated sliding thrust bearing - Google Patents

Heavy-load point-supported elastic tilting-pad water-lubricated sliding thrust bearing Download PDF

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Publication number
CN113494523A
CN113494523A CN202110792880.0A CN202110792880A CN113494523A CN 113494523 A CN113494523 A CN 113494523A CN 202110792880 A CN202110792880 A CN 202110792880A CN 113494523 A CN113494523 A CN 113494523A
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layer
ring
elastic
tile
pad
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CN202110792880.0A
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CN113494523B (en
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梁兴鑫
张森
杨志勇
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Wuhan University of Technology WUT
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Wuhan University of Technology WUT
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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H23/00—Transmitting power from propulsion power plant to propulsive elements
    • B63H23/32—Other parts
    • B63H23/321—Bearings or seals specially adapted for propeller shafts
    • B63H23/326—Water lubricated 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
    • F16C27/00—Elastic or yielding bearings or bearing supports, for exclusively rotary movement
    • F16C27/06—Elastic or yielding bearings or bearing supports, for exclusively rotary movement by means of parts of rubber or like materials
    • F16C27/063—Sliding contact 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
    • F16C33/02—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]
    • 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
    • F16C33/046—Brasses; Bushes; Linings divided or split, e.g. half-bearings or rolled sleeves
    • 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
    • F16C33/06—Sliding surface mainly made of metal
    • F16C33/12—Structural composition; Use of special materials or surface treatments, e.g. for rust-proofing
    • 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
    • F16C33/06—Sliding surface mainly made of metal
    • F16C33/12—Structural composition; Use of special materials or surface treatments, e.g. for rust-proofing
    • F16C33/122—Multilayer structures of sleeves, washers or liners
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H23/00—Transmitting power from propulsion power plant to propulsive elements
    • B63H23/32—Other parts
    • B63H23/321—Bearings or seals specially adapted for propeller shafts
    • B63H2023/325—Thrust bearings, i.e. axial bearings for propeller shafts
    • 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

Abstract

The invention discloses a water lubrication sliding thrust bearing with heavy-load point support elastic tilting pads, which comprises a support ring, a plurality of point support elastic tilting pads, a plurality of fixed pads and a thrust disc, wherein the support ring is arranged on the support ring; the supporting ring and the thrust disc are coaxially arranged, and a plurality of point supporting elastic tilting pads are circumferentially and uniformly distributed on the supporting ring; the fixed tiles are uniformly distributed on the thrust disc along the circumferential direction; the point-supported elastic tilting pad comprises a pad surface wear-resistant layer A, a substrate layer A, a pad seat, an elastic layer, a supporting layer and a rigid ball head which are sequentially connected from top to bottom; the tile surface wear-resistant layer A is made of any one of polycrystalline diamond, cubic boron nitride, ceramic and hard alloy. The invention has the beneficial effects that: the friction pair made of high-hardness materials, the elastic layer made of high-damping elastic materials and the rigid ball head structure are integrated on a single thrust tile, so that the overall performance of the thrust tile is improved, and the thrust tile has high bearing capacity, high wear resistance, vibration reduction and absorption and load balancing functions and impact resistance.

Description

Heavy-load point-supported elastic tilting-pad water-lubricated sliding thrust bearing
Technical Field
The invention relates to a thrust bearing, in particular to a water-lubricated sliding thrust bearing with a heavy-load point supporting elastic tilting pad.
Background
The load-bearing and wear-resistant properties of the water-lubricated thrust bearing limit the large-scale application of the water-lubricated thrust bearing. In the field of ship underwater propulsion systems, the vibration damping function and the low noise characteristic of a water lubrication thrust bearing are also required to be considered simultaneously so as to improve the concealment of ships. At present, materials such as high molecular polymers, nylon, laminated plates and the like are generally adopted by the water lubrication thrust bearing to manufacture a friction pair of the thrust shoe, the materials can quickly lose effectiveness due to abrasion in a silt water lubrication environment, and a water lubrication material with high bearing capacity and abrasion resistance is developed or selected, so that the water lubrication thrust bearing is the key for solving the problems of bearing capacity, abrasion resistance and the like. Due to the low noise characteristic of the bearing, in the structural optimization design of the bearing, the point support elastic tilting pad with the flexible self-adaptive tilting function and the vibration reduction and absorption function is developed by considering the integration of a large elastic damping material and a rigid ball head support structure into the thrust pad, so that the method is a feasible scheme.
Researches find that the bearing load-bearing performance and the wear resistance can be remarkably improved by improving the hardness of the friction pair material of the water-lubricated thrust bearing, and the material comprises polycrystalline diamond, cubic boron nitride, hard alloy, ceramic and the like. Polycrystalline diamond has found application in water lubricated thrust bearings. At present, the granted and published Chinese patents related to sliding thrust bearings developed by polycrystalline diamond materials include "diamond sliding thrust bearing" (publication number: CN 203835953U); an overload water lubrication sliding thrust bearing and a manufacturing method thereof (publication No. CN 112727919A); foreign patents include BEARING ASSEMBLIES, AND BEARING APPATATUSES AND MOTOR ASSEMBLIES USE SAME (US20120255789A 1); BEARING ELEMENTS, BEARING ASSEMBLIES, AND RELATED METHODS (US20130182980A 1); (US20140355914A1) OF METHODS OF OPERATING A BEARING applying recording TILTING PADS. However, the above sliding thrust bearings are simple in structure, most thrust pads on the thrust disc or the support ring are fixed pad structures, the thrust pads do not have the capability of changing the inclination angle in a working condition self-adaption mode, and the conditions of local contact scraping or overlarge stress and the like are easily generated, so that the pads are damaged. U.S. Pat. No. TILTING PAD BEARING applications, AND BEARING applications AND METHODS OF USING SAME (US20200347877a1) discloses a tilting pad thrust BEARING based on polycrystalline diamond material, but THE pad does not have elastic coordination capability (load balancing function), when THE height difference OF THE pad is large, THE situation that local contact stress is too large can also be generated, AND THE BEARING does not have vibration damping AND absorbing functions, AND THE structure can be induced to generate a large friction vibration phenomenon under THE high-rotating-speed working condition.
Except polycrystalline diamond, cubic boron nitride, hard alloy, ceramic materials and the like have higher hardness and wear resistance and are excellent materials for developing wear-resistant friction pairs of the water-lubricated tilting pad thrust bearing, but the application reports of the materials in the aspect of the water-lubricated tilting pad thrust bearing are not found at present, and meanwhile, related patents of point-support elastic tilting pad thrust bearings are not searched at home and abroad.
Disclosure of Invention
The invention aims to provide a water-lubricated sliding thrust bearing with a heavy-load point supporting elastic tilting pad, aiming at the defects of the prior art and solving the problems of poor bearing capacity, wear resistance, load balancing capacity, vibration reduction performance and the like of the existing water-lubricated thrust bearing.
The technical scheme adopted by the invention is as follows: a water lubrication sliding thrust bearing with heavy-load point support elastic tilting pads comprises a support ring, a plurality of point support elastic tilting pads, a plurality of fixed pads and a thrust disc; the supporting ring and the thrust disc are coaxially arranged, the supporting ring is connected with the fixed base, and a plurality of point supporting elastic tilting pads are circumferentially and uniformly distributed on the supporting ring to form a non-rotating part of the thrust bearing; the thrust disc is connected with the rotating shaft, and the fixed tiles are uniformly distributed on the thrust disc along the circumferential direction to form a rotating part of the thrust bearing; the point support elastic tilting pad arranged on the support ring is arranged opposite to the fixed pad arranged on the thrust disc, and the contact surface of the point support elastic tilting pad and the fixed pad forms a friction working surface of the thrust bearing; the point-supported elastic tilting pad comprises a pad surface wear-resistant layer A, a substrate layer A, a pad seat, an elastic layer, a supporting layer and a rigid ball head which are sequentially connected from top to bottom; the tile surface wear-resistant layer A is opposite to the surface of the fixed tile, and the contact surface is a friction working surface; the upper part of the rigid ball head is fixed on the supporting layer, and the lower surface of the rigid ball head is a hemispherical surface and is arranged on the supporting ring; the tile surface wear-resistant layer A is made of any one of polycrystalline diamond, cubic boron nitride, ceramic and hard alloy.
According to the scheme, the tile seat is provided with a top groove, the substrate layer A and the tile surface wear-resistant layer A are connected into a whole and then are installed in the top groove of the tile seat, and arc-shaped grooves are machined at four corners of the top groove; the supporting layer is provided with a bottom groove, the upper surface of the rigid ball head is a plane, and the upper part of the rigid ball head is fixed in the bottom groove.
According to the scheme, the substrate layer A is made of hard alloy, stainless steel or copper-based materials; the elastic layer is made of synthetic rubber or metal rubber material; the tile seat and the supporting layer can be made of stainless steel or copper-based metal materials.
According to the scheme, when the elastic layer is made of synthetic rubber, the elastic layer is connected with the tile seat and the supporting layer in a bonding or vulcanizing mode; when the elastic layer is made of metal rubber, the tile seat is connected with the supporting layer in a welding mode.
According to the scheme, the fixed tile is of a double-layer composite structure and comprises a tile surface wear-resistant layer B and a substrate layer B which are sequentially arranged from top to bottom; wherein the tile surface wear-resistant layer B is opposite to the tile surface wear-resistant layer A to form a friction pair, and the tile surface wear-resistant layer B and the tile surface wear-resistant layer A are made of the same material; the substrate layer B is fixedly connected with the thrust disc, and the substrate layer B and the substrate layer A are made of the same material.
According to the scheme, the support ring is of an annular groove-shaped structure and comprises an inner ring, an outer ring and an annular support plate for connecting the inner ring and the outer ring, the annular support plate of the support ring is circumferentially provided with mounting grooves matched with the rigid ball heads at intervals, the lower surfaces of the rigid ball heads are hemispherical surfaces and are arranged in the mounting grooves, and the distance between the tops of the rigid ball heads and the bottom of the support layer is 1-2 mm greater than the depth of the mounting grooves.
According to the scheme, the tops of the inner ring and the outer ring are provided with limit grooves at intervals in the circumferential direction; the inner side cambered surface and the outer side cambered surface of the tile seat are respectively connected with a limiting trunnion, and the limiting trunnion is matched with a limiting groove.
According to the scheme, the inner ring top of the support ring is provided with the inner retainer ring, the outer ring top of the support ring is provided with the outer retainer ring, and after the limiting trunnion is arranged in the limiting groove, the inner retainer ring and the outer retainer ring respectively compress the limiting groove.
According to the scheme, through holes corresponding to the positions are respectively formed in the inner ring and the outer ring.
The invention has the beneficial effects that:
1. in the invention, the friction pair made of high-hardness material, the elastic layer made of high-damping elastic material and the rigid ball head structure are integrated on a single thrust tile, the high-hardness material on the tile surface enables the thrust tile to have high bearing capacity and high wear resistance at the same time, the rigid ball head structure at the bottom of the tile can enhance the flexible inclined swinging capacity of the tile, and the high-damping elastic material in the interlayer can improve the vibration reduction and absorption and load balancing functions of the tile thrust block, better impact resistance and the like. According to the invention, through the innovative design of the structure, the manufacturing material and the manufacturing process of the thrust pad, the thrust pad has the advantages of high bearing capacity, high wear resistance, flexible tilting and swinging capacity, vibration reduction and absorption, load balancing function, better impact resistance and the like, and the requirements of ships, underwater vehicles and the like on high-bearing, wear-resistant and low-noise water lubrication thrust bearings are met.
2. The invention has simple and reasonable structure, few bearing parts and simple manufacturing process.
Drawings
FIG. 1 is a cross-sectional view of one embodiment of the present invention.
Fig. 2 is a top view of the point supported resilient tilting pad of this embodiment.
Fig. 3 is a cross-sectional view B-B of fig. 2.
Fig. 4 is a schematic structural diagram of the support ring in this embodiment.
Fig. 5 is a schematic view of the support ring of this embodiment mounted with 10 point supported elastically tiltable tiles.
Fig. 6 is a schematic view of the thrust plate for mounting 13 fixed shoes in the present embodiment.
In the figure: 1. a support ring; 1-1, a limiting groove; 1-2, mounting grooves; 1-3, countersunk bolt holes; 1-4, through holes; 2. point supporting the elastic tilting pad; 2-1, a tile surface wear-resistant layer A; 2-2, a substrate layer A; 2-3, a tile seat; 2-4, an elastic layer; 2-5, a support layer; 2-6, a rigid ball head; 2-7, limiting trunnions; 2-8, arc-shaped groove; 3. fixing the tile; 3-1, a tile wear-resistant layer B; 3-2, a substrate layer B; 4. a thrust disc; 5. an outer retainer ring; 6. an inner retainer ring.
Detailed Description
For a better understanding of the present invention, reference is made to the following detailed description taken in conjunction with the accompanying drawings.
A heavy-duty point-supported elastically tiltable pad water-lubricated sliding thrust bearing as shown in fig. 1, 5 and 6 comprises a support ring 1, a plurality of point-supported elastically tiltable pads 2, a plurality of fixed pads 3 and a thrust disc 4; the supporting ring 1 and the thrust disc 4 are coaxially arranged, the supporting ring 1 is connected with a fixed base (the bottom of the supporting ring 1 is provided with a plurality of countersunk bolt holes 1-3 for being connected with bolts of the fixed base), and a plurality of supporting elastic tilting pads 2 are circumferentially and uniformly distributed on the supporting ring 1 to form a non-rotating part of the thrust bearing; the thrust disc 4 is connected with the rotating shaft (a plurality of bolt holes are uniformly distributed on the peripheral surface of the thrust disc 4 and are used for being connected with the rotating shaft bolt), and a plurality of fixed tiles 3 are uniformly distributed on the thrust disc 4 along the circumferential direction to form a rotating part of the thrust bearing; the point support elastic tilting pad 2 arranged on the support ring 1 and the fixed pad 3 arranged on the thrust disc 4 are oppositely arranged, and the contact surfaces of the two pads form a friction working surface of the thrust bearing, and the friction working surface is used for bearing the axial force under the water environment.
As shown in fig. 2-3, the point-supported elastic tilting pad 2 is a multi-layer composite structure which is fan-shaped (or can be made into a round or rectangular shape) as a whole, and comprises a pad surface wear-resistant layer a2-1, a substrate layer a2-2, a pad holder 2-3, an elastic layer 2-4, a support layer 2-5 and a rigid ball head 2-6 which are sequentially connected from top to bottom; the tile surface wear-resistant layer A2-1 is opposite to the surface of the fixed tile 3, and the contact surface is a friction working surface; specifically, a top groove is formed in the tile seat 2-3, and the substrate layer A2-2 and the tile surface wear-resistant layer A2-1 are connected into a whole and then are installed in the top groove of the tile seat 2-3; the upper surface of the rigid ball head 2-6 is a plane, the lower surface is a hemispherical surface, the supporting layer 2-5 is provided with a bottom groove, the upper part of the rigid ball head 2-6 is fixed in the bottom groove, and the lower part of the rigid ball head 2-6 is arranged on the supporting ring 1. In the invention, the elastic layers 2-4 and the rigid ball heads 2-6 are integrated on a point-supporting elastic tilting pad 2, so that the point-supporting elastic tilting pad 2 has the functions of vibration reduction, vibration absorption and load balancing and also has the flexible self-adaptive tilting and swinging capability. Preferably, arc-shaped grooves 2-8 are processed at four corners of the top groove and are used for releasing stress generated by deformation of the tile seat 2-3 and preventing the tile surface wear-resistant layer A2-1 from cracking due to excessive local stress.
In the invention, the tile surface wear-resistant layer A2-1 is made of any one of polycrystalline diamond, cubic boron nitride, ceramic and hard alloy, but is not limited to the four materials; the substrate layer A2-2 is made of hard alloy, stainless steel or copper-based material. The elastic layers 2-4 can be made of high-damping elastic materials such as synthetic rubber or metal rubber, but are not limited to the two materials; when the elastic layer 2-4 is made of synthetic rubber, the elastic layer is connected with the tile seat 2-3 and the supporting layer 2-5 in a bonding or vulcanizing manner; when the elastic layer 2-4 is made of metal rubber, the tile seat 2-3 and the supporting layer 2-5 are connected in a welding mode. The tile seat 2-3 and the supporting layer 2-5 can be made of stainless steel or copper-based metal materials. The rigid ball heads 2-6 are made of high-hardness corrosion-resistant stainless steel materials and have interchangeability.
Preferably, as shown in fig. 4, the support ring is of an annular groove-shaped structure and comprises an inner ring, an outer ring and an annular support plate for connecting the inner ring and the outer ring, mounting grooves 1-2 matched with the rigid ball heads 2-6 are circumferentially arranged on the annular support plate of the support ring 1 at intervals, the lower surfaces of the rigid ball heads 2-6 of the point-support elastic tilting pads 2 are hemispherical surfaces and are arranged in the mounting grooves 1-2, and the distance between the tops of the rigid ball heads 2-6 and the bottom of the support layer 2-5 is 1-2 mm greater than the depth of the mounting grooves 1-2. In the embodiment, the number of the mounting grooves 1-2 is matched with the number of the rigid ball heads 2-6.
Preferably, through holes 1-4 with corresponding positions are respectively arranged on the inner ring and the outer ring (the axes of the through holes with corresponding positions on the inner ring and the outer ring are overlapped) and are used for removing silt, particles and the like entering the inside of the support ring, so that the flexibility of the tile swing caused by the accumulation of sundries is avoided; the top parts of the inner ring and the outer ring are circumferentially provided with limiting grooves 1-1 at intervals; the inner side arc surface and the outer side arc surface of the tile seat 2-3 are respectively connected with limiting trunnions 2-7, the axes of the two limiting trunnions 2-7 are overlapped, and the limiting trunnions 2-7 are matched with the limiting grooves 1-1; the top of the inner ring of the support ring 1 is provided with an inner retainer ring 6, the top of the outer ring of the support ring 1 is provided with an outer retainer ring 5, and after the limiting trunnions 2-7 are installed in the limiting grooves 1-1, the inner retainer ring and the outer retainer ring respectively compress the limiting grooves 1-1.
In the embodiment, the diameter of the limiting trunnion 2-7 is smaller than the width of the limiting groove 1-1, and the length of the limiting trunnion 2-7 is slightly smaller than the radial depth of the limiting groove 1-1. After all the point support elastic tilting pads 2 are arranged on the support ring 1, the inner retainer ring 5 and the outer retainer ring 6 are respectively arranged on the support ring 1, and the opening of the limiting groove 1-1 is pressed. This construction and the design of the fit ensure that the point-supported elastically tiltable tiles 2 swing on the support ring 1 flexibly without falling off.
In the invention, the fixed tile 3 is fixedly arranged on the thrust disc 4 by welding or bonding, has no capability of swinging or self-adaptive tilting, and only moves along with the thrust disc. The fixed tile 3 is of a double-layer composite structure and comprises a tile surface wear-resistant layer B3-1 and a substrate layer B3-2 which are sequentially arranged from top to bottom; wherein the tile surface wear-resistant layer B3-1 and the tile surface wear-resistant layer A2-1 are opposite to form a friction pair, and the two layers are made of the same material; the substrate layer B3-2 is fixedly connected with the thrust disc 4, and the substrate layer B3-2 and the substrate layer A2-2 are made of the same material.
The working principle of the invention is as follows:
the thrust disc 4 is directly arranged on the rotating shaft and rotates along with the rotating shaft; the support ring 1 is mounted directly on the fixed base. During operation, the thrust disc 4 rotates and transmits the axial force to the pad surface wear layer A2-1 of the point support elastic tilting pad 2 through the pad surface wear layer B3-1 of the fixed pad 3, and the point support elastic tilting pad 2 transmits the axial force to the fixed base to complete the transmission of the axial force from the rotating part to the static part. The cooling water flows freely through the gaps around the point support elastic tilting pad 2 or the fixed pad 3, lubricates the friction working surface and takes away the friction heat. When the rotation axis of the thrust disc 4 is inclined relative to the support ring 1, the thrust bearing may be changed from two friction surface contact bearing to local point contact bearing, which causes excessive local stress, and the bearing is damaged, at which time the rigid ball 2-6 of the point supporting elastic tilting pad 2 acts to make the supporting elastic tilting pad 2 self-adaptively incline to reduce the local large contact stress. Since the heights of the point-supported elastically tiltable tiles 2 are not completely consistent during bearing development, it is possible that the axial loads to which each tile is subjected during operation differ significantly, and at this point the elastic layers 2-4 of the point-supported elastically tiltable tiles 2 will act and their elastic deformation capabilities will make the loads on the tiles as uniform as possible. In addition, when the rotating shaft has impact load, the elastic layers 2-4 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 heavy-load point support elastic tilting pad water lubrication sliding thrust bearing exceeds 20MPa in a water lubrication environment, and the PV value is greater than 100 MPa-m-s-1Under the working condition (in a non-fluid lubrication sliding bearing, the working capacity of the bearing is represented by a PV value (meanwhile, the working condition load of the bearing can also be represented by the PV value), P is the pressure (Mpa) borne by a working surface of the bearing, V is the average sliding speed (m/s) of a friction surface, the unit of the PV value is Mpa.m/s, the higher the allowable PV value of the bearing is, the stronger the working capacity is, the longer the service life is calculated according to the abrasion loss, and the bearing capacity and the service life are both far superior to 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. A water lubrication sliding thrust bearing with a heavy-load point support elastic tilting pad is characterized by comprising a support ring, a plurality of point support elastic tilting pads, a plurality of fixed pads and a thrust disc; the supporting ring and the thrust disc are coaxially arranged, the supporting ring is connected with the fixed base, and a plurality of point supporting elastic tilting pads are circumferentially and uniformly distributed on the supporting ring to form a non-rotating part of the thrust bearing; the thrust disc is connected with the rotating shaft, and the fixed tiles are uniformly distributed on the thrust disc along the circumferential direction to form a rotating part of the thrust bearing; the point support elastic tilting pad arranged on the support ring is arranged opposite to the fixed pad arranged on the thrust disc, and the contact surface of the point support elastic tilting pad and the fixed pad forms a friction working surface of the thrust bearing; the point-supported elastic tilting pad comprises a pad surface wear-resistant layer A, a substrate layer A, a pad seat, an elastic layer, a supporting layer and a rigid ball head which are sequentially connected from top to bottom; the tile surface wear-resistant layer A is opposite to the surface of the fixed tile, and the contact surface is a friction working surface; the upper part of the rigid ball head is fixed on the supporting layer, and the lower part of the rigid ball head is arranged on the supporting ring; the tile surface wear-resistant layer A is made of any one of polycrystalline diamond, cubic boron nitride, ceramic and hard alloy.
2. The water-lubricated sliding thrust bearing according to claim 1, wherein the pad holder is provided with a top groove, the substrate layer a and the wear-resistant layer a of the pad surface are connected into a whole and then are installed in the top groove of the pad holder, and arc-shaped grooves are machined at four corners of the top groove; the supporting layer is provided with a bottom groove, the upper surface of the rigid ball head is a plane, and the upper part of the rigid ball head is fixed in the bottom groove.
3. The water-lubricated sliding thrust bearing according to claim 2, wherein the substrate layer a is made of cemented carbide, stainless steel or a copper-based material; the elastic layer is made of synthetic rubber or metal rubber material; the tile seat and the supporting layer can be made of stainless steel or copper-based metal materials.
4. The water-lubricated sliding thrust bearing according to claim 3, wherein, when the elastic layer is made of synthetic rubber, the elastic layer is bonded or vulcanized to the pad and the supporting layer; when the elastic layer is made of metal rubber, the tile seat is connected with the supporting layer in a welding mode.
5. The water-lubricated sliding thrust bearing according to claim 3, wherein the fixed shoe is of a double-layer composite structure and comprises a shoe surface wear-resistant layer B and a substrate layer B which are arranged from top to bottom in sequence; wherein the tile surface wear-resistant layer B is opposite to the tile surface wear-resistant layer A to form a friction pair, and the tile surface wear-resistant layer B and the tile surface wear-resistant layer A are made of the same material; the substrate layer B is fixedly connected with the thrust disc, and the substrate layer B and the substrate layer A are made of the same material.
6. The water-lubricated sliding thrust bearing according to claim 2, wherein the support ring is of an annular groove-shaped structure and comprises an inner ring, an outer ring and an annular support plate for connecting the inner ring and the outer ring, mounting grooves matched with the rigid ball heads are formed in the annular support plate of the support ring at intervals in the circumferential direction, the lower surface of the rigid ball head is a hemispherical surface and is arranged in the mounting grooves, and the distance between the top of the rigid ball head and the bottom of the support layer is 1-2 mm greater than the depth of the mounting grooves.
7. The water-lubricated sliding thrust bearing of claim 6, wherein the top portions of said inner and outer rings are circumferentially spaced apart by a retaining groove; the inner side cambered surface and the outer side cambered surface of the tile seat are respectively connected with a limiting trunnion, and the limiting trunnion is matched with a limiting groove.
8. The water-lubricated sliding thrust bearing according to claim 6, wherein an inner retainer ring is disposed on the top of the inner ring of the support ring, an outer retainer ring is disposed on the top of the outer ring of the support ring, and the inner and outer retainer rings respectively press the retainer grooves after the retainer trunnion is installed in the retainer groove.
9. The water-lubricated sliding thrust bearing according to claim 6, wherein the inner ring and the outer ring are respectively provided with through holes corresponding in position.
CN202110792880.0A 2021-07-14 2021-07-14 Heavy load point supporting elastic tilting pad Shui Runhua sliding thrust bearing Active CN113494523B (en)

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