CN114562517B - Bearing retainer and main bearing of shield tunneling machine - Google Patents
Bearing retainer and main bearing of shield tunneling machine Download PDFInfo
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- CN114562517B CN114562517B CN202210239538.2A CN202210239538A CN114562517B CN 114562517 B CN114562517 B CN 114562517B CN 202210239538 A CN202210239538 A CN 202210239538A CN 114562517 B CN114562517 B CN 114562517B
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- 229910052755 nonmetal Inorganic materials 0.000 description 2
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/46—Cages for rollers or needles
- F16C33/4617—Massive or moulded cages having cage pockets surrounding the rollers, e.g. machined window cages
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/46—Cages for rollers or needles
- F16C33/4617—Massive or moulded cages having cage pockets surrounding the rollers, e.g. machined window cages
- F16C33/4664—Massive or moulded cages having cage pockets surrounding the rollers, e.g. machined window cages with more than three parts, e.g. two end rings connected by individual stays
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/46—Cages for rollers or needles
- F16C33/56—Selection of substances
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/58—Raceways; Race rings
- F16C33/583—Details of specific parts of races
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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
- F16C2204/00—Metallic materials; Alloys
- F16C2204/10—Alloys based on copper
Abstract
The utility model relates to the technical field of shield machines, and aims to provide a bearing retainer and a shield machine main bearing so as to solve the technical problem that the bearing retainer of the shield machine main bearing in the prior art is low in overall wear resistance and rigidity tensile property. The shield machine main bearing comprises an inner ring, an outer ring, rollers and a bearing retainer, wherein the bearing retainer comprises a plurality of retainer sections which are circumferentially arranged, pockets are formed in the retainer sections, limiting blocks are arranged between adjacent retainer sections, the limiting blocks are matched with the retainer sections along the circumferential direction of the bearing retainer in a sleeved mode, one of the limiting blocks matched with the retainer sections in a sleeved mode is provided with a slot, the other one of the limiting blocks and the retainer sections is provided with a limiting part, the limiting part is in clearance fit with the slot, so that the limiting blocks of the mutual sleeves and the retainer sections can move relatively in the circumferential direction of the bearing retainer, and the limiting blocks are provided with isolating parts between the adjacent retainer sections; the limiting block is made of flexible materials or elastic materials.
Description
Technical Field
The utility model relates to the technical field of shield machines, in particular to a connection mode of a shield machine bearing retainer.
Background
The shield tunneling machine is totally called a shield tunneling machine, and is engineering mechanical equipment for a large-scale tunneling construction link. The shield machine has the functions of digging and cutting rock soil, conveying dregs, splicing and building tunnels, automatically rectifying deviation and the like. Because the shield machine has larger volume and worse working occasion environment, the reliability of each component in the shield machine is required to be extremely high.
The main bearing is used as one of key structures of the shield machine, and plays an important role in rotating and supporting a cutter head of the shield machine. The main bearing is connected with the tunneling cutterhead, bears huge axial load, radial load and overturning load, and the reliability of the main bearing is directly related to whether the shield tunneling machine can stably run. Bearing retainers are used in the main bearing of the shield machine for carrying out interval arrangement of bearing rollers, and the bearing retainers serve as internal components of the bearing, so that contact collision and dislocation among the bearing rollers can be effectively prevented, and the rollers are uniformly distributed in the main bearing and reliably run. The existing shield machine bearing retainer is generally divided into an integral structure and a sectional structure. The manufacturing process of the segmented retainer is mature, but due to the acting force of the rollers, severe collision and abrasion conditions exist among the segments of retainers when the main bearing works, and the operation reliability of the bearing is seriously affected. The integral retainer can effectively avoid the collision problem of the segmented retainer, but the main bearing of the shield machine is a large-sized bearing, the size of the used bearing retainer is larger, the integral retainer with large diameter size is difficult to process and has high production cost, and the rigidity of the integral retainer with large diameter size can not be effectively ensured. Therefore, the main bearing of the shield machine mainly adopts a sectional retainer, and how to effectively reduce the collision acting force among the sections of the sectional retainer becomes a key for ensuring the connection of the main bearing and the stable operation of the shield machine.
The utility model patent with the application publication number of CN105485172A discloses a retainer of a main shaft bearing of a shield machine, which consists of a retainer with a plurality of sectional structures, such as a main thrust raceway retainer, an auxiliary thrust raceway retainer, a radial raceway retainer and the like, and is used for being matched with and installed with an inner component of the main shaft bearing. However, the split type retainer has collision and abrasion during the working of the main bearing, which is unfavorable for the connection and use of the bearing retainer.
The utility model patent with the publication number of CN206419351U discloses a novel guiding sectional retainer, wherein the circumference of the retainer is formed by splicing a plurality of sections of sectional retainer bodies, the surface of the retainer body is embedded with a wear-resistant alloy block structure, the surface of the outer diameter is embedded with a welded outer diameter alloy block, and the upper end face and the lower end face are embedded with welded end face alloy blocks. The sectional retainer can be integrally connected together through the inlaid welding arrangement of the alloy blocks. However, the guide sectional retainer is inlaid with the alloy blocks on the surfaces, and the alloy blocks possibly knock or break the retainer when the retainer segments collide with each other or run, so that the retainer is damaged, and meanwhile, the rigidity of the whole structure of the retainer is reduced and the wear resistance of the retainer is greatly reduced after the retainer segments are connected with each other due to the different rigidities of the retainer segments and the alloy blocks.
Disclosure of Invention
The utility model aims to provide a bearing retainer to solve the technical problems of low overall wear resistance, low rigidity and low tensile resistance of the bearing retainer of a main bearing of a shield tunneling machine in the prior art. In addition, the utility model also aims to provide a main bearing of the shield machine so as to solve the problems.
In order to achieve the above purpose, the technical scheme of the bearing retainer provided by the utility model is as follows:
the utility model provides a bearing retainer, including a plurality of retainer sections that circumference is arranged, be provided with the pocket hole that is used for installing the bearing roller on the retainer section, be provided with the stopper between the adjacent retainer section, stopper and the adjacent retainer section of stopper are along bearing retainer circumference plug bush cooperation, wherein be provided with the slot on one of stopper and the retainer section of mutual plug bush cooperation, be provided with the spacing part that is used for inserting in the slot along bearing retainer circumference on the other, spacing part and slot clearance fit, so that stopper and the retainer section of mutual plug bush can be in the relative activity of bearing retainer's circumference, the stopper has the isolation part that is in between adjacent retainer section in order to separate adjacent retainer section; the limiting block is made of flexible materials or elastic materials.
The beneficial effects are that: the limiting blocks are used for mutually constraining the retainer segments into a whole by the split bodies, the material of the limiting blocks is made of flexible materials or elastic materials, flexible or elastic buffering can be provided when the limiting blocks are extruded by the retainer segments, extrusion force or pulling force can be effectively counteracted when direct contact collision between the retainer segments is avoided, and the limiting blocks and the retainer segments which are mutually inserted can move relatively in the circumferential direction of the bearing retainer in a clearance fit mode, so that the bearing retainer can be in a self-adaptive moving state when in operation of the bearing. Compared with the integral bearing retainer with high cost and low rigidity, the sectional bearing retainer with lower wear resistance and poor anti-collision effect in the prior art, the bearing retainer provided by the utility model has the advantages that the bearing retainer can effectively resist the anti-collision while the running state of the bearing is not influenced, and the connection and the disassembly of the limiting block and the retainer section which are connected in a matched manner through the plug bush are convenient, so that the cost is effectively reduced.
Preferably, the limiting block is made of nonmetal high polymer.
Preferably, the slots are arranged on the limiting blocks, and slot openings corresponding to two retainer segments adjacent to the limiting blocks are opposite; the isolation part is positioned between two slots with opposite openings on the limiting block. The two ends of the limiting block are respectively provided with a slot, so that two adjacent retainer segments can be conveniently inserted and installed, the isolation part can separate the two adjacent retainer segments, collision is prevented, connection is convenient, and the structure is ingenious.
Preferably, the cross-sectional area of the stopper is greater than the cross-sectional area of the cage segment. The cross-sectional area of the limiting block is larger than that of the retainer segment, so that the limiting block can cover the retainer segment in the circumferential direction, and the anti-collision and separation effects of the limiting block are better.
Preferably, the distance H between the hole wall of the pocket at the extreme end of the cage segment, which is close to the limiting block, and the corresponding end face of the cage segment is greater than the maximum depth H of the slot. The bearing roller in the pocket is prevented from contacting the limiting block.
Preferably, antifriction blocks are arranged on the end surfaces of the two sides of the retainer segment, the antifriction blocks are provided with supporting surfaces for contacting with the inner ring roller surfaces and the outer ring roller surfaces of the bearing, and the height of the supporting surfaces is larger than that of the end surfaces of the retainer segment, which are higher than that of the limiting blocks. The antifriction block prevents the axial side face of the limiting block from contacting with the inner ring or the outer ring of the bearing, and abrasion of the limiting block is reduced.
Preferably, the antifriction blocks on the end faces of both sides of each cage segment are arranged at least two places in the circumferential direction. At least two antifriction blocks on the end surfaces of the two sides enable the retainer segments to be arranged between the inner ring and the outer ring of the bearing and then to be supported and balanced, and the whole is stable.
Preferably, the friction reducing blocks on the two side faces of the cage segment are arranged symmetrically in the axial direction of the cage segment. The antifriction blocks symmetrically arranged in the axial direction of the retainer segment enable the stress of the two axial end faces of the retainer segment to be the same, and the stability of the retainer segment after connection arrangement is improved.
Preferably, the friction reducing blocks are made of a copper alloy material. The copper alloy material has higher wear resistance and longer service life.
The technical scheme of the main bearing of the shield tunneling machine provided by the utility model is as follows:
the main bearing of the shield machine comprises an inner ring, an outer ring, bearing rollers and a bearing retainer for being assembled and fixed with the bearing rollers, wherein the bearing retainer comprises a plurality of retainer segments which are circumferentially arranged, pockets for installing the bearing rollers are formed in the retainer segments, limiting blocks are arranged between adjacent retainer segments, the limiting blocks and the retainer segments adjacent to the limiting blocks are in sleeve fit along the circumferential direction of the bearing retainer, a slot is formed in one of the limiting blocks and the retainer segments which are in sleeve fit with each other, a limiting part for being inserted into the slot along the circumferential direction of the bearing retainer is arranged on the other limiting part, the limiting part is in clearance fit with the slot, so that the limiting blocks and the retainer segments which are in sleeve fit with each other can move relatively along the circumferential direction of the bearing retainer, and the limiting blocks are provided with isolating parts which are positioned between the adjacent retainer segments to separate the adjacent retainer segments; the limiting block is made of flexible materials or elastic materials.
The beneficial effects are that: the limiting blocks are used for mutually constraining the retainer segments into a whole by the split bodies, the material of the limiting blocks is made of flexible materials or elastic materials, flexible or elastic buffering can be provided when the limiting blocks are extruded by the retainer segments, extrusion force or pulling force can be effectively counteracted when direct contact collision between the retainer segments is avoided, and the limiting blocks and the retainer segments which are mutually inserted can move relatively in the circumferential direction of the bearing retainer in a clearance fit mode, so that the bearing retainer can be in a self-adaptive moving state when in operation of the bearing. Compared with the integral bearing retainer with high cost and low rigidity, the sectional bearing retainer with lower wear resistance and poor anti-collision effect in the prior art, the bearing retainer provided by the utility model has the advantages that the bearing retainer can effectively resist the anti-collision while the running state of the bearing is not influenced, and the connection and the disassembly of the limiting block and the retainer section which are connected in a matched manner through the plug bush are convenient, so that the cost is effectively reduced.
Preferably, the limiting block is made of nonmetal high polymer.
Preferably, the slots are arranged on the limiting blocks, and slot openings corresponding to two retainer segments adjacent to the limiting blocks are opposite; the isolation part is positioned between two slots with opposite openings on the limiting block. The two ends of the limiting block are respectively provided with a slot, so that two adjacent retainer segments can be conveniently inserted and installed, the isolation part can separate the two adjacent retainer segments, collision is prevented, connection is convenient, and the structure is ingenious.
Preferably, the cross-sectional area of the stopper is greater than the cross-sectional area of the cage segment. The cross-sectional area of the limiting block is larger than that of the retainer segment, so that the limiting block can cover the retainer segment in the circumferential direction, and the anti-collision and separation effects of the limiting block are better.
Preferably, the distance H between the hole wall of the pocket at the extreme end of the cage segment, which is close to the limiting block, and the corresponding end face of the cage segment is greater than the maximum depth H of the slot. The bearing roller in the pocket is prevented from contacting the limiting block.
Preferably, antifriction blocks are arranged on the end surfaces of the two sides of the retainer segment, the antifriction blocks are provided with supporting surfaces for contacting with the inner ring roller surfaces and the outer ring roller surfaces of the bearing, and the height of the supporting surfaces is larger than that of the end surfaces of the retainer segment, which are higher than that of the limiting blocks. The antifriction block prevents the axial side face of the limiting block from contacting with the inner ring or the outer ring of the bearing, and abrasion of the limiting block is reduced.
Preferably, the antifriction blocks on the end faces of both sides of each cage segment are arranged at least two places in the circumferential direction. At least two antifriction blocks on the end surfaces of the two sides enable the retainer segments to be arranged between the inner ring and the outer ring of the bearing and then to be supported and balanced, and the whole is stable.
Preferably, the friction reducing blocks on the two side faces of the cage segment are arranged symmetrically in the axial direction of the cage segment. The antifriction blocks symmetrically arranged in the axial direction of the retainer segment enable the stress of the two axial end faces of the retainer segment to be the same, and the stability of the retainer segment after connection arrangement is improved.
Preferably, the friction reducing blocks are made of a copper alloy material. The copper alloy material has higher wear resistance and longer service life.
Preferably, an annular retainer groove is formed in the outer ring of the main bearing and used for assembling the bearing retainer, an outer arc boss protruding towards the radial outer side is arranged on the bearing retainer, an inner arc boss protruding towards the radial inner side is also arranged on the bearing retainer, and two groove walls of the retainer groove are respectively in radial limit fit with the outer arc boss and the inner arc boss. The limiting block is radially spaced from the groove wall of the retainer groove through the arrangement of the inner arc boss and the outer arc boss, so that abrasion of the limiting block is reduced, and the service life of the limiting block is prolonged.
Drawings
Fig. 1 is a first view angle split schematic diagram (bearing rollers are not shown) of embodiment 1 of a main bearing of a shield machine provided by the present utility model;
FIG. 2 is a second view of FIG. 1;
FIG. 3 is a cross-sectional view of the bearing retainer of FIG. 1;
FIG. 4 is a front view of the bearing cage of FIG. 1 (friction reducing blocks not shown);
FIG. 5 is a partial schematic view of the bearing retainer of FIG. 1; (inner and outer arc boss not shown)
FIG. 6 is a cross-sectional view of the cage segment of FIG. 4;
FIG. 7 is a schematic view of the upper limit portion of the cage segment of FIG. 4;
FIG. 8 is a half cross-sectional view of the stop block of FIG. 1;
FIG. 9 is a schematic view of the stopper in FIG. 8;
reference numerals illustrate:
1. a bearing holder; 2. a cage segment; 3. a pocket; 4. a limiting block; 5. a slot; 6. an isolation portion; 7. a limit part; 8. an outer arc boss; 9. an inner arc boss; 10. an outer ring; 11. an inner ring; 12. a cage groove; 13. an inner ring raceway surface; 14. antifriction blocks.
Detailed Description
The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the particular embodiments described herein are illustrative only and are not intended to limit the utility model, i.e., the embodiments described are merely some, but not all, of the embodiments of the utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by a person skilled in the art without making any inventive effort, are intended to be within the scope of the present utility model.
It is noted that relational terms such as "first" and "second", and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, terms such as "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" or the like is not excluded from a process, method, or the like that includes the element.
In the description of the present utility model, the terms "mounted," "connected," "coupled," and "connected," as may be used broadly, and may be connected, for example, fixedly, detachably, or integrally, unless otherwise specifically defined and limited; can be mechanically or electrically connected; either directly, indirectly through intermediaries, or in communication with the interior of the two elements. The specific meaning of the above terms in the present utility model can be understood by those skilled in the art in specific cases.
In the description of the present utility model, it should be noted that, unless explicitly stated and limited otherwise, the term "provided" may be interpreted broadly, and for example, an object "provided" may be a part of a body, may be separately disposed from the body, and may be connected to the body, where the connection may be a detachable connection or an undetachable connection. The specific meaning of the above terms in the present utility model can be understood by those skilled in the art in specific cases.
The present utility model is described in further detail below with reference to examples.
The embodiment 1 of the main bearing of the shield tunneling machine provided by the utility model comprises the following components:
the main bearing of the shield machine is assembled in the shield body of the shield machine and is connected with the cutterhead when in use, and can bear the load born by the cutterhead. As shown in fig. 1 and 2, the main bearing of the shield machine comprises an inner ring 11, an outer ring 10, bearing rollers (not shown in the drawings) and a bearing retainer 1 for assembling and fixing the bearing rollers. The outer ring 10 of the main bearing of the shield machine is provided with a retainer groove 12 facing the inner ring 13, the bearing retainer 1 is assembled in the retainer groove 12, the inner arc surface and the outer arc surface of the bearing retainer 1 are respectively opposite to the two groove walls of the retainer groove 12, the bearing retainer 1 is provided with a pocket 3, and the pocket 3 is used for installing bearing rollers. After the bearing rollers are mounted in the pockets 3 on the bearing retainer 1, the bearing rollers can be in rolling fit with the bottom surfaces of the retainer grooves 12, the bottom surfaces of the retainer grooves 12 are the outer ring raceway surfaces of the bearing, and the other sides of the bearing rollers can be in rolling fit with the inner ring raceway surfaces 13 of the inner ring 11 as shown in fig. 2.
As shown in fig. 3 to 7, the bearing retainer 1 has a sectional structure, and includes a plurality of circumferentially arranged retainer segments 2, and each retainer segment 2 is provided with a plurality of pockets 3 arranged at intervals. All the retainer segments 2 are connected together through limiting blocks 4, the limiting blocks 4 are made of flexible materials, and two adjacent retainer segments 2 are matched with the same limiting block 4 in a plug bush mode along the circumferential direction of the bearing retainer 1. The bearing cage 1 is assembled in a connecting manner by connecting the cage segments 2 to form a closed loop by means of a stop 4 made of flexible material. When the rotating speed of the shield tunneling machine cutterhead is high in the tunneling process, the limiting block 4 can effectively offset collision force between the retainer segments 2 according to flexible deformation of the shield tunneling machine cutterhead.
As shown in fig. 6, the cage segments 2 are in a sector ring block structure, the pockets 3 on each cage segment 2 are rectangular holes, a plurality of pockets 3 are arranged on the cage segments 2, and the pockets 3 are uniformly distributed at intervals along the circumferential direction of the cage segments 2. As shown in fig. 7, the end surfaces on both sides of the circumferential sector of each cage segment 2 form a plugging surface for plug-in fitting with the stopper 4, and the outer end portion of the cage segment 2 where the plugging surface is located forms a stopper portion 7.
As shown in fig. 8 and 9, the stopper 4 is also a sector ring block structure, and the stopper 4 is made of a high molecular polymer, specifically a high molecular polymer nylon material. The high molecular polymer nylon material has good tensile flexibility, can effectively bear collision extrusion and tensile force between the retainer segments 2, and ensures the strength and stability of the bearing retainer 1 which is arranged in a segmented way. Wherein, slot 5 is all equipped with on the holder circumference opposite sides of stopper 4, and slot 5 opening is arranged in opposite directions on same stopper 4, and slot 5 is used for pegging graft with the spacing part 7 of holder section 2. The limiting part 7 of the retainer segment 2 is in clearance fit with the slot 5, so that the limiting block 4 of the mutual plug bush and the retainer segment 2 can relatively move in the circumferential direction of the bearing retainer 1, thereby ensuring that the bearing retainer 1 has a movement allowance for collision movement after the retainer segments 2 are connected through the limiting block 4, and ensuring that the limiting block 4 can effectively eliminate collision or stretching between the retainer segments 2. In this embodiment, the size and structure of each stopper 4 are the same.
As shown in fig. 5, two slots 5 with opposite notches on two sides of the limiting block 4 are not communicated with each other, an isolation part 6 for isolating the slots 5 is formed between the two slots 5 of the same limiting block 4, and the cross section of the limiting block 4 in the circumferential direction of the bearing retainer is in an I-shaped symmetrical structure. When two adjacent cage segments 2 are inserted in the same limiting block 4, the isolating parts 6 are positioned between the adjacent cage segments 2 to isolate the adjacent cage segments 2, and the isolating parts 6 prevent the limiting parts 7 of the two adjacent cage segments 2 from colliding.
In this embodiment, the retainer segments 2 are inserted into the slots 5 on the limiting blocks 4 through the limiting portions 7 at both ends thereof, so that the outer ends of the slot walls of the slots 5 at both sides of the limiting blocks 4 protrude out of the ends of the retainer segments 2. As shown in fig. 3 and 4, the inner arc surface and the outer arc surface of each retainer segment 2 along the circumferential direction of the fan are respectively provided with bosses which are arranged at intervals along the circumferential direction, wherein the outer arc surface of the retainer segment 2 is provided with outer arc bosses 8, and the inner arc bosses 9 are arranged on the inner arc surface of the retainer segment 2. The protruding height of the limiting block 4 at the two radial ends of the retainer segment 2 is lower than the radial heights of the outer arc boss 8 and the inner arc boss 9, so that the limiting block 4 is prevented from contacting with the groove wall of the retainer groove 12, and when the bearing retainer 1 is installed in the retainer groove 12, the outer arc boss 8 and the inner arc boss 9 on the retainer segment 2 can be in limiting fit with the groove wall of the retainer groove 12 in the radial direction. In other embodiments, the boss may also be in the form of an ear plate, where the ear plate is disposed on the radial inner and outer arc surfaces of the retainer segment, and the outer side surface of the ear plate is in the shape of a circular arc.
As shown in fig. 5, antifriction blocks 14 are arranged on the end surfaces of the two sides of each retainer segment 2 facing the inner ring 11 and the outer ring 10, the antifriction blocks 14 are provided with supporting surfaces for contacting the inner ring raceway surface and the outer ring raceway surface of the bearing, and the height of the supporting surfaces is larger than that of the end surfaces of the limiting blocks 4 protruding out of the retainer segments 2 and facing the inner ring and the outer ring. Wherein, as shown in fig. 5, a plurality of antifriction blocks 14 are circumferentially arranged on the two axial side end surfaces of each cage segment 2, and the antifriction blocks 14 on the two side end surfaces of each cage segment 2 are symmetrically arranged in the axial direction of the cage segment 2. In this embodiment, the antifriction blocks 14 are made of copper alloy material, which has high abrasion resistance and long life.
In this embodiment, through the limit protection of the antifriction blocks 14 on the inner side and the outer side of the limiting block 4 and the limit protection of the inner arc boss and the outer arc boss on the two radial ends of the limiting block 4, after the limiting block 4 connects each cage segment 2 into the closed-loop bearing cage 1, each outer end surface of the limiting block 4 is not contacted with the inner ring and the outer ring of the bearing, so that the limiting block 4 is effectively protected, and the service life of the limiting block is prolonged.
As shown in fig. 6 and 8, the distance H between the hole wall of the pocket 3 at the extreme end of the cage segment 2, which is close to the limiting block 4, and the plugging surface of the cage segment 2 is greater than the maximum depth H of the slot 5, so that the bearing rollers in the pocket 3 are prevented from contacting with the limiting block 4. The bottom surface of the slot 5 of the limiting block 4 can be contacted and attached with the plugging surface of the retainer segment 2. After the retainer segment 2 is inserted into the slots 5 at two sides of the limiting block 4 through the limiting part, the intervals among the pockets 3 on the formed bearing retainer 1 are the same.
According to the shield machine bearing retainer 1 is integrally restrained by the limiting block 4, the limiting block 4 flexibly inserts each retainer segment 2, direct contact between the retainer segments is avoided, severe collision between the retainer segments is effectively reduced, the limiting part 7 on the retainer segments 2 is in clearance fit with the slot 5, so that the mutually inserted limiting block 4 and the retainer segments 2 can move relatively in the circumferential direction of the bearing retainer 1, and the overall wear resistance and rigidity of the bearing retainer 1 are improved through clearance fit between the limiting part 7 and the slot 5 and flexible protection provided by the limiting block 4. Compared with the integral bearing retainer 1 with high cost and low rigidity and the sectional bearing retainer 1 with low wear resistance and poor anti-collision effect in the prior art, the bearing retainer 1 in the utility model has the advantages that the bearing retainer 1 does not influence the use of the bearing, simultaneously effectively resists the tension and the collision and eliminates the abrasion, and the bearing retainer 1 formed by the bearing retainer is convenient to connect and detach, thereby effectively reducing the cost.
The embodiment 2 of the main bearing of the shield tunneling machine provided by the utility model comprises the following components:
the difference from embodiment 1 is that in embodiment 1, the stopper 4 is provided with a slot 5, and both circumferential ends of the holder segment 2 are stopper portions 7 for insertion into the slot 5. In this embodiment, the slots are disposed at two axial ends of the cage segment, the limiting blocks are block structures with two ends being insertion ends, and the limiting blocks can be inserted into the slots on the cage segment to connect two adjacent cage segments in a sleeved mode. In other embodiments, slots are further formed at one of two opposite ends of the limiting block, a solid structure is further formed at the other end of the limiting block, slots are formed at one of the two opposite ends of the same retainer segment, and a limiting portion for insertion is disposed at the other end of the same retainer segment, so that a continuous and mutual insertion structure is realized in which the limiting block is inserted into one end of the retainer segment, the other end of the retainer segment is inserted into another limiting block, and the other limiting block is inserted into the next retainer segment.
The embodiment 3 of the main bearing of the shield tunneling machine provided by the utility model comprises the following components:
the difference from embodiment 1 is that in embodiment 1, the stopper 4 is made of a flexible material. In this embodiment, the stopper is made of an elastic material.
The embodiment 4 of the main bearing of the shield tunneling machine provided by the utility model comprises the following components:
the difference from embodiment 1 is that in embodiment 1, the stopper 4 is made of a nylon material of a nonmetallic high-molecular polymer. In the embodiment, the limiting block is made of polyether-ether-ketone high-molecular polymer.
The embodiment 5 of the main bearing of the shield tunneling machine provided by the utility model comprises the following components:
the difference from embodiment 1 is that in embodiment 1 the cross-sectional area of the stopper 4 is larger than the cross-sectional area of the holder segment 2. In this embodiment, the cross-sectional area of the stopper is equal to the cross-sectional area of the cage segment. In other embodiments, the cross-sectional area of the stopper may be smaller than the cross-sectional area of the cage segments, but it must be ensured that two adjacent cage segments will not collide and interfere after the stopper is disposed.
The embodiment 6 of the main bearing of the shield tunneling machine provided by the utility model comprises the following components:
the difference from embodiment 1 is that in embodiment 1, friction reducing blocks 14 are provided on both side end surfaces of the cage segment 2, and the friction reducing blocks 14 are symmetrically arranged on both side end surfaces of the cage segment 2. In this embodiment, in order to increase the antifriction and anti-vibration effects, the number and positions of antifriction blocks on the end surfaces of both sides of the cage segment are increased and changed, for example, a plurality of antifriction blocks are provided on the cage segment between the pockets. In other embodiments, the friction reducing blocks on the end faces of the two sides of the cage segment may also be arranged asymmetrically.
The embodiment 7 of the main bearing of the shield tunneling machine provided by the utility model comprises the following components:
unlike embodiment 1, in embodiment 1, the friction reducing blocks 14 are made of a copper alloy material. In this embodiment, the friction reducing blocks are made of stainless steel metal material. In other embodiments, the friction reducing blocks may also be made of flexible or elastomeric materials.
The specific embodiment of the bearing retainer provided by the utility model comprises the following components:
the bearing retainer has the same structure as the bearing retainer 1 in the main bearing of each shield machine, and comprises a plurality of retainer segments which are circumferentially arranged, wherein the retainer segments are provided with pockets for installing bearing rollers, adjacent retainers are connected through limiting block sleeves, and limiting blocks are made of flexible materials or elastic materials; the outer cambered surface and the inner cambered surface of the retainer segment are respectively provided with a boss, and the side surfaces of the retainer segment facing the inner ring and the outer ring are respectively provided with antifriction blocks, and the specific structure is not repeated here.
In other embodiments of the shield machine main bearing and bearing retainer, friction reducing blocks and/or bosses may also be omitted.
It should be noted that the above-mentioned embodiments are merely preferred embodiments of the present utility model, and the present utility model is not limited to the above-mentioned embodiments, but may be modified without inventive effort or equivalent substitution of some of the technical features thereof by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (10)
1. A bearing retainer comprising a plurality of retainer segments (2) which are circumferentially arranged, wherein pockets (3) for mounting bearing rollers are arranged on the retainer segments (2), characterized in that limiting blocks (4) are arranged between adjacent retainer segments (2), the limiting blocks (4) are matched with the retainer segments (2) adjacent to the limiting blocks (4) along the circumferential direction of the bearing retainer (1) in a sleeved mode, slots (5) are arranged on one of the limiting blocks (4) and the retainer segments (2) which are matched with each other in a sleeved mode, limiting parts (7) for being inserted into the slots (5) along the circumferential direction of the bearing retainer (1) are arranged on the other, the limiting parts (7) are in clearance fit with the slots (5), so that the limiting blocks (4) and the retainer segments (2) which are mutually sleeved can move relatively in the circumferential direction of the bearing retainer (1), and the limiting blocks (4) are provided with isolating parts (6) which are arranged between the adjacent retainer segments (2) to separate the adjacent retainer segments (2); the limiting block (4) is made of flexible materials or elastic materials.
2. Bearing retainer according to claim 1, characterized in that the stopper (4) is made of a non-metallic high molecular polymer.
3. Bearing retainer according to claim 1, characterized in that the slots (5) are arranged on the limiting block (4), and the openings of the slots (5) corresponding to the two retainer segments (2) adjacent to the limiting block (4) are opposite; the isolation part (6) is positioned between two slots (5) with opposite openings on the limiting block (4).
4. A bearing cage according to claim 3, characterized in that the distance H between the wall of the pocket (3) located at the extreme end of the cage segment (2) near the stop block (4) and the corresponding end face of the cage segment (2) is greater than the maximum depth H of the slot (5).
5. Bearing cage according to any of claims 1-4, characterized in that the cage segments (2) are provided with friction reducing blocks (14) on both side end faces, the friction reducing blocks (14) having bearing surfaces for contact with the inner and outer raceway surfaces of the bearing, the height of the bearing surfaces being greater than the height of the stop blocks (4) above the end faces of the cage segments (2).
6. Bearing cage according to claim 5, characterized in that the friction-reducing blocks (14) on both side faces of each cage segment (2) are arranged at least two places in the circumferential direction.
7. Bearing cage according to claim 6, characterized in that the friction reducing blocks (14) on both side faces of the cage segment (2) are arranged symmetrically in the axial direction of the cage segment (2).
8. Bearing cage according to claim 5, characterized in that the friction reducing blocks (14) are made of a copper alloy material.
9. A main bearing of a shield machine, comprising an inner ring (11), an outer ring (10), bearing rollers and a bearing retainer for assembly and fixation with the bearing rollers, characterized in that the bearing retainer is a bearing retainer (1) according to any one of the preceding claims 1-8.
10. The main bearing of the shield machine according to claim 9, wherein an annular retainer groove (12) is formed in an outer ring (10) of the main bearing of the shield machine, the retainer groove (12) is used for assembling the bearing retainer (1), an outer arc boss (8) protruding towards the radial outer side is arranged on the bearing retainer (1), an inner arc boss (9) protruding towards the radial inner side is also arranged on the bearing retainer (1), and two groove walls of the retainer groove (12) are respectively in radial limit fit with the outer arc boss (8) and the inner arc boss (9).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210239538.2A CN114562517B (en) | 2022-03-11 | 2022-03-11 | Bearing retainer and main bearing of shield tunneling machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210239538.2A CN114562517B (en) | 2022-03-11 | 2022-03-11 | Bearing retainer and main bearing of shield tunneling machine |
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| CN114562517A CN114562517A (en) | 2022-05-31 |
| CN114562517B true CN114562517B (en) | 2024-03-26 |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN114562517A (en) | 2022-05-31 |
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