CN114576271A - Metal reinforced retainer for liquid oxygen pump main shaft bearing and preparation process thereof - Google Patents
Metal reinforced retainer for liquid oxygen pump main shaft bearing and preparation process thereof Download PDFInfo
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- CN114576271A CN114576271A CN202210261565.XA CN202210261565A CN114576271A CN 114576271 A CN114576271 A CN 114576271A CN 202210261565 A CN202210261565 A CN 202210261565A CN 114576271 A CN114576271 A CN 114576271A
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- retainer
- rivet
- blocks
- liquid oxygen
- oxygen pump
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- 239000002184 metal Substances 0.000 title claims abstract description 49
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 title claims abstract description 29
- 238000002360 preparation method Methods 0.000 title claims abstract description 9
- -1 polytetrafluoroethylene Polymers 0.000 claims abstract description 61
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims abstract description 61
- 239000004810 polytetrafluoroethylene Substances 0.000 claims abstract description 61
- 239000000463 material Substances 0.000 claims abstract description 27
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 19
- 239000010959 steel Substances 0.000 claims abstract description 19
- 230000000670 limiting effect Effects 0.000 claims description 15
- 238000004519 manufacturing process Methods 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 3
- 239000007769 metal material Substances 0.000 claims description 2
- 230000017525 heat dissipation Effects 0.000 description 4
- 230000002829 reductive effect Effects 0.000 description 4
- 230000008602 contraction Effects 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 238000005549 size reduction Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
Images
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
- F16C33/38—Ball cages
- F16C33/3812—Ball cages formed of interconnected segments, e.g. chains
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C69/00—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rolling Contact Bearings (AREA)
Abstract
The utility model provides a liquid oxygen pump is metal strenghthened type holder for main shaft bearing and preparation technology thereof, this holder includes a plurality of holder piece, retainer plate and rivet sleeve pipe, and every pocket all has two adjacent holder pieces to constitute, and the both sides of each holder piece are equipped with convex location structure respectively, evenly is equipped with shape and convex location structure assorted spacing recess along circumference on the terminal surface of retainer plate, the retainer plate set up in the both sides of a plurality of holder piece and through spacing recess on it with convex location structure cooperation is connected, the rivet sleeve pipe is installed in the rivet hole of each holder piece to fix through a plurality of rivet pole. The scheme can solve the problem that the linear expansion coefficient of the polytetrafluoroethylene material is large to influence the guide clearance of the guide flange of the retainer, the clearance between the pocket and the steel ball, ensure the structural stability, reliability and high-speed performance of the retainer at low temperature, be applicable to the low-temperature and high-speed working conditions of the liquid oxygen pump and reduce the weight of the retainer as much as possible.
Description
Technical Field
The invention relates to the technical field of bearing design, mainly relates to a large-size three-point contact ball bearing used in a liquid oxygen environment and a high-speed working condition, and particularly relates to a metal reinforced retainer for a main shaft bearing of a liquid oxygen pump and a preparation process thereof.
Background
A certain type three point contact ball bearing for spacecraft liquid oxygen pump main shaft, internal diameter 120mm, external diameter 215mm, dn value reaches 2.3 x 106. When the bearing works, the bearing is soaked in liquid oxygen at the temperature of minus 192 ℃ to minus 143 ℃, and the liquid oxygen provides lubrication and cooling. The retainer is an important part of the bearing, and the polytetrafluoroethylene material has been used as a material of the retainer in small-size bearings for partial liquid oxygen pumps due to the characteristics of high temperature resistance, low temperature resistance, corrosion resistance and the like, and the advantages of small static friction coefficient and the like. The difference between the linear expansion coefficient of the polytetrafluoroethylene and the linear expansion coefficients of the bearing ring and the steel ball material is large, for a bearing with a small size, the size variation of the retainer from normal temperature (20 ℃) to low temperature (-192 ℃ to-143 ℃) is still small relative to the variation of the ring and the steel ball, and the huge variation of the guide gap and the pocket gap of the retainer can not be caused, so that the working of the bearing in a liquid oxygen environment is influenced. However, for a bearing with a larger size, such as a bearing with an inner diameter of 120mm, the radial size reduction of the polytetrafluoroethylene retainer is not less than 1mm, and the clearance between the retainer and the flange is seriously affected, so that the rotational stability and the high-speed rotation capability of the retainer are affected, and even the retainer is locked with the flange of the inner ring when the clearance is serious; the size reduction of the pocket is about 0.16mm, so that the gap between the pocket and the steel ball is reduced, the heat dissipation and high-speed performance are not facilitated, and the steel ball can be locked in serious cases.
Disclosure of Invention
In order to solve the technical problem, the invention provides a metal reinforced retainer for a main shaft bearing of a liquid oxygen pump and a preparation process thereof.
The technical scheme adopted by the invention is as follows: the utility model provides a liquid oxygen pump is metal strenghthened type holder for main shaft bearing, includes a plurality of holder piece, retainer plate, rivet sleeve pipe and rivet pole, every pocket hole all has two adjacent holder pieces to constitute, and the both sides of each holder piece are equipped with convex location structure respectively, evenly is equipped with shape and convex location structure assorted spacing recess along circumference on the terminal surface of retainer plate, the retainer plate set up in the both sides of a plurality of holder piece and through spacing recess on it with convex location structure cooperation is connected, the rivet sleeve pipe is installed in the rivet hole of each holder piece, and a plurality of holder piece, retainer plate and rivet sleeve pipe are fixed through a plurality of rivet pole.
Preferably, the convex positioning structure is in the shape of a cylinder structure.
Preferably, the length of the rivet sleeve is the same as the width of the retainer block, and the material of the rivet sleeve is the same as that of the rivet stem.
Preferably, the limiting groove on the fixing ring is connected with the convex positioning structure in an interference fit mode.
Preferably, the holder block is made of polytetrafluoroethylene.
Preferably, the fixing ring is made of metal.
Preferably, ball pocket structures are arranged on the inner diameter surfaces of the retainer blocks, and the ball pocket structures of two adjacent retainer blocks can form self-locking, so that the steel balls cannot fall out from the inner diameter of the retainer after being placed in the retainer pockets.
Preferably, the ball pocket structure is a pocket formed by two adjacent retainer blocks, and a steel ball is arranged in the pocket and does not protrude out of the outer diameter of the retainer.
A preparation process of a metal reinforced retainer with a novel structure comprises the following steps:
s1, manufacturing a plurality of polytetrafluoroethylene retainer blocks according to structural parameters of a three-point contact ball bearing of a main shaft of the liquid oxygen pump, wherein the polytetrafluoroethylene retainer blocks form an annular retainer body, and the length of each retainer block meets the requirement that each pocket is formed by two adjacent retainer blocks;
s2, processing a rivet hole in each polytetrafluoroethylene retainer block, processing convex positioning structures on two sides of each polytetrafluoroethylene retainer block to manufacture a fixing ring for fixing and clamping the retainer blocks, wherein the fixing ring is made of metal, a plurality of limiting grooves matched with the convex positioning structures in shape are processed on the clamping end face of the fixing ring, and the position of each limiting groove corresponds to the convex positioning structure on one retainer block;
s3, installing rivet sleeves in rivet holes of a plurality of polytetrafluoroethylene retainer blocks, enabling two ends of the rivet sleeves to be flush with end faces of the retainer blocks, clamping fixing rings on two sides of all the retainer blocks, connecting convex positioning structures of the retainer blocks and convex positioning structures of the retainer blocks through limiting grooves in the rivet sleeves in an interference fit mode, manufacturing a plurality of rivet rods by using the same material of the rivet sleeves, and sequentially enabling the rivet rods to penetrate through the fixing rings and the rivet sleeves to fix the retainer blocks and the fixing rings into an integrated structure.
In a preferable embodiment, in the above manufacturing process, after the plurality of retainer blocks are assembled to the retainer ring, the normal-temperature gap between adjacent retainer blocks is 1 mm.
The invention has the beneficial effects that:
this scheme is through the structural design of innovation, the adoption is by a plurality of sectional type holder pieces, the retainer plate, the integrated metal strenghthened type holder of a body structure of rivet sleeve pipe and rivet bar, this scheme has adopted the holder piece of making by polytetrafluoroethylene material of sectional type, combine together with the retainer plate through rivet sleeve pipe and rivet bar, can reduce the friction heat production of holder and steel ball, reduce holder subassembly weight, thereby improve the bearing high-speed performance, low friction has, light-weighted, dimensional stability is high, high-speed performance's characteristics.
Furthermore, through the innovative design, the polytetrafluoroethylene retainer body is divided into multiple sections, and a plurality of polytetrafluoroethylene retaining and adding blocks are adopted to be fixed by the fixing ring in an integral structure, so that the adverse effects of large linear expansion coefficient and large size cold contraction quantity of the polytetrafluoroethylene material on the retainer can be solved, and the influences on the rotation stability, the high-speed performance, the pocket heat dissipation capacity and the like of the retainer due to overlarge guide gaps and pocket gap variations of the retainer and the guide flanges are avoided;
furthermore, through the innovative design, each pocket is formed by two adjacent retainer blocks, the polytetrafluoroethylene retainer blocks can be considered to be segmented by the pockets, and proper gaps are designed between the adjacent retainer blocks; has the following advantages: when the size of the integral type retainer is shrunk from a normal temperature environment to a liquid oxygen low temperature environment, the circumferential size is linearly shrunk due to the temperature reduction except that the radial size is reduced, the size of the pocket is reduced, the reduction is larger than that of the steel ball, the clearance of the pocket is reduced, the heat dissipation and high-speed performance are affected, and even the steel ball is locked when the size is serious; if the mode that the metal fixing ring strengthens the retainer is adopted and the polytetrafluoroethylene retainer is not segmented, the polytetrafluoroethylene material is subjected to circumferential tension at a pocket between two adjacent rivet holes, and the risk of breaking at low temperature exists. Therefore, the polytetrafluoroethylene retainer blocks are segmented from the pocket holes, the rivet hole is located in the circumferential center of the single retainer block, and the retainer blocks can be positioned in the radial direction and the circumferential direction through rivets. The pocket hole of finished product holder comprises two adjacent holder blocks, during the metal retainer ring shrinkage, two adjacent rivet hole intervals are the trend that reduces, and each section polytetrafluoroethylene holder piece is to rivet hole center shrink, because of polytetrafluoroethylene linear expansion coefficient is greater than metal retainer ring material linear expansion coefficient, event each pocket hole circumference size all is the increase trend, go up adjacent rivet hole distance according to the metal retainer ring, first pocket hole lateral wall of polytetrafluoroethylene piece and tip are apart from the distance in rivet hole, can calculate the shrinkage size difference, thereby calculate pocket hole size circumference variation and two adjacent polytetrafluoroethylene piece clearance variation. The pocket hole is designed to be an oval pocket hole, the circumferential size of the pocket hole is increased at low temperature, high-speed operation and heat dissipation of the bearing are facilitated, and a gap between two adjacent retainer blocks (a gap at the bottom of the pocket hole formed by the two adjacent retainer blocks) is also increased. Considering that in a low-temperature liquid oxygen environment, the polytetrafluoroethylene retainer blocks, the guide flanges and the steel balls generate heat through friction, the temperature is possibly slightly higher than that of the metal fixing ring, and the possibility of reducing circumferential clearance exists, at the moment, the elliptical pocket design can avoid the influence on the rotation of the steel balls due to the excessively small circumferential size of the pockets, and large normal-temperature clearance (the recommended clearance is about 1mm) is designed between the adjacent retainer blocks, so that the influence on the rotation of the steel balls due to the extrusion deformation of pocket bottom materials at the pockets at low temperature can be avoided;
further, through the design of innovation, set up convex location structure respectively in the both sides of each retainer block, evenly be equipped with shape and convex location structure assorted spacing recess along circumference on the terminal surface of retainer plate, the retainer plate set up in the both sides of a plurality of retainer block and through spacing recess on it with convex location structure connects with interference fit, has following advantage: every section polytetrafluoroethylene retainer block is fixed in between two metal retainer rings by a rivet that passes retainer block middle part rivet hole, if there is not special fixed mode, polytetrafluoroethylene retainer block axial shrinkage size is greater than the rivet under the low temperature, metal retainer ring will unable compress tightly polytetrafluoroethylene retainer block, then retainer block will have the rotational degree of freedom that uses the rivet as the axle center, holder external diameter (guide face) circularity will unable the assurance, each pocket hole will also be uncontrollable because of the retainer block rotates, there is the risk that makes the bearing jamming. The metal fixing ring is designed to be of a groove-shaped structure, two ends of the polytetrafluoroethylene retainer block are designed to be convex, the polytetrafluoroethylene retainer block and the metal fixing ring are combined, and on the basis that the rivet positions the polytetrafluoroethylene retainer block, the polytetrafluoroethylene retainer block is fixed through the matching of the groove and the convex, and the structural stability of the retainer is guaranteed. Meanwhile, the size variation and the radial thickness variation of the two-end convex shapes of the polytetrafluoroethylene retainer block under the condition of the radial thickness cold contraction of the metal groove are respectively calculated, and the proper normal-temperature interference magnitude is designed, so that the situation that the two-end convex shapes of the polytetrafluoroethylene retainer block and the groove of the metal reinforcing ring cannot generate gaps in the low-temperature working process is ensured, and the situation that the structural stability of the retainer is influenced due to the fact that the gaps are generated in the convex shapes of the metal groove and the polytetrafluoroethylene retainer block in the matching mode at low temperature, the retainer block shakes between the metal reinforcing rings, vibration is increased, the rotational stability of the retainer is influenced, and the high-speed performance of the bearing is influenced is avoided;
furthermore, through the innovative design, a rivet sleeve made of the same material as the rivet rod is arranged on the rivet rod connecting each retainer block and the fixing ring, so that the axial stability of the retainer is enhanced. If no rivet sleeve design, during low temperature shrinkage, polytetrafluoroethylene holder piece axial dimension reduction is greater than the length reduction of rivet rod, and polytetrafluoroethylene holder piece will have the axial displacement of minizone, influences the structural stability of holder low temperature, probably leads to the work in vibration just big, influences the bearing high-speed performance. And increase the rivet sleeve design in the rivet hole of polytetrafluoroethylene cage piece, and the rivet sleeve material gets the same material with the rivet pole, and during each part size shrinkage at low temperature, the rivet sleeve length reduction is the same with rivet pole length reduction, still can support two metal strengthening rings, can not produce the axial clearance to the axial stability of polytetrafluoroethylene cage piece under the assurance low temperature.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a sectional view of the structure taken along line A-A of FIG. 1;
fig. 3 is a partially enlarged schematic view of a portion B in fig. 2.
The labels in the figure are: 1. the rivet comprises a retainer block 11, a convex positioning structure 2, a fixing ring 3, a rivet sleeve 4 and a rivet rod.
Detailed Description
The invention is described in detail below by way of exemplary embodiments. It should be understood, however, that elements, structures, and features of one embodiment may be beneficially incorporated in other embodiments without further recitation.
It should be noted that: unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of the terms "a" and "an" or "the" and similar referents in the description and claims of the present invention are not to be construed as limiting in number, but rather as indicating the presence of at least one. The word "comprise" or "comprises", and the like, indicates that the element or item listed before "comprises" or "comprising" covers the element or item listed after "comprising" or "comprises" and its equivalents, but does not exclude other elements or items having the same function.
Examples 1,
The detailed structure of the present embodiment is described below with reference to the accompanying drawings:
as shown in the figure, a metal reinforced retainer for a liquid oxygen pump main shaft bearing mainly comprises a plurality of retainer blocks 1 made of polytetrafluoroethylene materials, a fixed ring 2, a plurality of rivet sleeves 3 and rivet rods 4, wherein the retainer blocks 1 made of polytetrafluoroethylene materials integrally form an annular retainer body, the fixed ring 2 is provided with two retainer blocks which are respectively in an annular structure and fixed on the end faces of the two sides of the annular retainer body formed by the retainer blocks 1, the fixed ring can be made of metal materials, each pocket hole is formed by two adjacent retainer blocks 1, the two sides of each retainer block 1 are respectively provided with a convex positioning structure 11, the end face of the fixed ring 2 is circumferentially and uniformly provided with a limiting groove matched with the convex positioning structures 11 in shape, the fixed ring 2 is arranged on the two sides of the retainer blocks and is connected with the convex positioning structures 11 in a matching manner through the limiting grooves on the fixed ring 2, the rivet sleeve 3 is installed in the rivet hole of each retainer block 1, and is provided with a corresponding rivet sleeve 3 and rivet rod 4 corresponding to each retainer block 1, so that the retainer blocks 1, the fixing ring 2 and the rivet sleeve 3 are fixed by the rivet rods 4.
In this embodiment, the length of the rivet sleeve is the same as the width of the retainer block, so that the two ends of the rivet sleeve are flush with the end face of the retainer block after assembly, and the material of the rivet sleeve is the same as the material of the rivet stem.
In the embodiment, the ball pocket structures are arranged on the inner diameter surfaces of the retainer blocks, and the ball pocket structures of two adjacent retainer blocks can form self-locking, so that the steel balls cannot fall out of the inner diameter of the retainer after being placed in the retainer pocket holes; the ball pocket structure is a pocket hole formed by two adjacent retainer blocks, and a steel ball is arranged in the pocket hole and cannot protrude out of the outer diameter of the retainer, so that the steel ball and the retainer assembly are conveniently assembled in an outer ring flange, and the bearing assembly and disassembly and the inspection of an inner working surface are facilitated.
The scheme can be analyzed; firstly, the polytetrafluoroethylene retainer is segmented and fixed by metal fixing rings, and considering that the radial dimension cold shrinkage of the integral polytetrafluoroethylene retainer when the temperature changes from normal temperature to low temperature takes the axis as the origin, and takes the outer diameter as an example, and the cold shrinkage quantity is delta L1＝α1×△T×Dc(α1The linear expansion coefficient of the polytetrafluoroethylene material, delta T is the temperature difference, Dc is the outer diameter size of the retainer), and the size variation has larger influence on the guide clearance of the retainer. Under the condition of not changing material properties, the original point of radial dimension cold shrinkage of the polytetrafluoroethylene retainer can be changed into a rivet hole in the middle of each polytetrafluoroethylene block from the integral axis by dividing the polytetrafluoroethylene retainer into a plurality of sections and positioning each section of the retainer by the metal fixing ring and the rivet in a structural mode, wherein the radial dimension cold shrinkage of a single retainer block is delta L2＝α1xDeltaT x (Dc-Dcp)/2(Dc is the outer diameter of the retainer, Dcp is the center diameter of the rivet hole of the retainer); each retainer block structure is fixed by a metal fixing ring, and radial cold shrinkage delta L of the central diameter of a rivet hole on the metal fixing ring3＝α2×△T×Dcp(α2Linear expansion coefficient of the metal retainer ring material), the amount of cold shrinkage of the outer diameter of the cage is Δ L ═ Δ L3+2△L2＝α2×△T×Dcp+α1XDELTA T X (Dc-Dcp). According to the formula, when α is2＝α1When Δ L ═ Δ L1; the material of the metal fixed ring is the same as that of the bearing ring, such as stainless steel 9Cr18, and the linear expansion coefficient alpha of the metal fixed ring is2Less than polytetrafluoroethyleneCoefficient of linear expansion of alpha1If Δ L is less than Δ L1That is, the structure of the sectional polytetrafluoroethylene retainer block is fixed by the metal fixing ring, the variation of the radial size under the condition of cold contraction is smaller than that of the whole polytetrafluoroethylene retainer, and the variation can be calculated. During design, the increase of the guide clearance is obtained by calculating the difference value between the outer diameter cold shrinkage of the novel retainer and the outer ring flange cold shrinkage, and a proper normal-temperature guide clearance is selected to ensure that the guide clearance is in a proper range at low temperature, so that the retainer works stably at low temperature; and each pocket is composed of two adjacent sectional polytetrafluoroethylene retainer blocks, the circumferential size of the pocket is increased under the condition of shrinkage of the retainer, and the oval pocket is favorable for the high-speed performance of the retainer. Sectional type polytetrafluoroethylene retainer piece is fixed in between two metal retainer rings through the rivet stem, and the convex at retainer piece both ends is radial interference fit with the recess design of metal retainer ring, can guarantee that each sectional type polytetrafluoroethylene retainer piece is guaranteeing radial positioning, circumference equipartition and regard the rivet hole as the restriction of central rotational degree of freedom on the retainer with the rivet hole position, through the suitable magnitude of interference of design, guarantees that the structure and the performance of retainer are firm at low temperature. And fourthly, designing a rivet sleeve between the rivet hole and the rivet rod of each polytetrafluoroethylene retainer block, wherein the length of the rivet sleeve is the same as the width of the retainer block, and the material is the same as the rivet rod, so that the retainer block can be axially positioned between the two metal fixing rings at low temperature, and the retainer block is prevented from shaking due to low-temperature cold shrinkage and axial clearance with the metal fixing rings, and the stability of the structure of the retainer at low temperature is influenced.
In this embodiment, the convex positioning structure 11 preferably has a cylindrical shape, so that the convex positioning structure 11 is more conveniently connected with the limiting groove on the fixing ring 2 in a matching manner.
A preparation process of a metal reinforced retainer with a novel structure comprises the following steps:
firstly, manufacturing a plurality of polytetrafluoroethylene retainer blocks according to structural parameters of a three-point contact ball bearing of a main shaft of a liquid oxygen pump, wherein the polytetrafluoroethylene retainer blocks form an annular retainer body, and the length of each retainer block meets the requirement that each pocket is formed by two adjacent retainer blocks;
processing a rivet hole in each polytetrafluoroethylene retainer block, simultaneously processing convex positioning structures on two sides to manufacture a fixing ring for fixing and clamping the retainer blocks, wherein the fixing ring is made of metal, a plurality of limiting grooves matched with the convex positioning structures in shape are processed on the clamping end surface of the fixing ring, and the position of each limiting groove corresponds to the convex positioning structure on one retainer block;
and step three, installing rivet sleeves in rivet holes of the polytetrafluoroethylene retainer blocks, enabling two ends of each rivet sleeve to be flush with the end faces of the retainer blocks, clamping the fixing rings on two sides of all the retainer blocks, connecting the fixing rings with the convex positioning structures of the retainer blocks in an interference fit mode through limiting grooves in the rivet sleeves, manufacturing a plurality of rivet rods by adopting the same material of the rivet sleeves, and fixing the plurality of retainer blocks and the fixing rings into an integral structure by sequentially penetrating the rivet rods through the fixing rings and the rivet sleeves.
In the preparation process, after the retainer blocks are assembled into the fixing ring, the normal-temperature gap between the adjacent retainer blocks is 1mm, and the gap can be set to avoid the condition that the rotation of the steel ball is influenced by the extrusion deformation of the bottom pocket material at the pocket hole at low temperature.
It should be noted that, this scheme is more applicable to liquid oxygen pump, high-speed, the great three point contact ball bearing of size, but also can popularize and apply in angular contact ball bearing and four point contact ball bearing structure.
It should be noted that while the invention has been described in terms of the above-mentioned embodiments, other embodiments are also possible. It will be apparent to those skilled in the art that various changes and modifications can be made herein without departing from the spirit and scope of the invention, and it is intended that all such changes and modifications fall within the scope of the appended claims and their equivalents.
Claims (10)
1. The utility model provides a liquid oxygen pump is metal strenghthened type holder for main shaft bearing which characterized in that: including a plurality of holder piece, retainer plate, rivet sleeve pipe and rivet pole, every pocket hole all has two adjacent holder pieces to constitute, and the both sides of each holder piece are equipped with convex location structure respectively, evenly are equipped with shape and convex location structure assorted spacing recess along circumference on the terminal surface of retainer plate, the retainer plate set up in the both sides of a plurality of holder piece and through spacing recess on it with convex location structure cooperation is connected, the rivet sleeve pipe is installed in the rivet hole of each holder piece, and a plurality of holder piece, retainer plate and rivet sleeve pipe are fixed through a plurality of rivet pole.
2. The metal reinforced retainer for the liquid oxygen pump spindle bearing according to claim 1, characterized in that: the convex positioning structure is in a cylindrical structure.
3. The metal reinforced retainer for the liquid oxygen pump spindle bearing according to claim 1, characterized in that: the length of the rivet sleeve is the same as the width of the retainer block, and the material of the rivet sleeve is the same as that of the rivet rod.
4. The metal reinforced retainer for the liquid oxygen pump spindle bearing according to claim 1, characterized in that: and the limiting groove on the fixing ring is connected with the convex positioning structure in an interference fit mode.
5. The metal reinforced retainer for the liquid oxygen pump spindle bearing according to claim 1, characterized in that: the holder block is made of polytetrafluoroethylene.
6. The metal reinforced retainer for the liquid oxygen pump spindle bearing according to claim 1, characterized in that: the fixing ring is made of metal materials.
7. The metal reinforced retainer for the liquid oxygen pump spindle bearing according to claim 1, characterized in that: the ball pocket structure is arranged on the inner diameter surface of each retainer block, and the ball pocket structures of two adjacent retainer blocks can form self-locking so as to prevent a steel ball from falling out of the inner diameter of the retainer after being placed into the retainer pocket hole.
8. The metal reinforced retainer for the liquid oxygen pump spindle bearing according to claim 1, characterized in that: the ball pocket structure is a pocket hole formed by two adjacent retainer blocks, and a steel ball is arranged in the pocket hole and cannot protrude out of the outer diameter of the retainer.
9. The preparation process of the metal reinforced retainer for the liquid oxygen pump spindle bearing according to any one of claims 1 to 8, wherein: the method comprises the following steps:
s1, manufacturing a plurality of polytetrafluoroethylene retainer blocks according to structural parameters of a three-point contact ball bearing of a main shaft of the liquid oxygen pump, wherein the polytetrafluoroethylene retainer blocks form an annular retainer body, and the length of each retainer block meets the requirement that each pocket is formed by two adjacent retainer blocks;
s2, processing a rivet hole in each polytetrafluoroethylene retainer block, processing convex positioning structures on two sides of each polytetrafluoroethylene retainer block to manufacture a fixing ring for fixing and clamping the retainer blocks, wherein the fixing ring is made of metal, a plurality of limiting grooves matched with the convex positioning structures in shape are processed on the clamping end face of the fixing ring, and the position of each limiting groove corresponds to the convex positioning structure on one retainer block;
s3, installing rivet sleeves in rivet holes of a plurality of polytetrafluoroethylene retainer blocks, enabling two ends of the rivet sleeves to be flush with end faces of the retainer blocks, clamping fixing rings on two sides of all the retainer blocks, connecting convex positioning structures of the retainer blocks and convex positioning structures of the retainer blocks through limiting grooves in the rivet sleeves in an interference fit mode, manufacturing a plurality of rivet rods by using the same material of the rivet sleeves, and sequentially enabling the rivet rods to penetrate through the fixing rings and the rivet sleeves to fix the retainer blocks and the fixing rings into an integrated structure.
10. The process according to claim 9, characterized in that: after the plurality of retainer blocks are assembled into the fixing ring, the normal-temperature clearance between the adjacent retainer blocks is 1 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210261565.XA CN114576271A (en) | 2022-03-16 | 2022-03-16 | Metal reinforced retainer for liquid oxygen pump main shaft bearing and preparation process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210261565.XA CN114576271A (en) | 2022-03-16 | 2022-03-16 | Metal reinforced retainer for liquid oxygen pump main shaft bearing and preparation process thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114576271A true CN114576271A (en) | 2022-06-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210261565.XA Pending CN114576271A (en) | 2022-03-16 | 2022-03-16 | Metal reinforced retainer for liquid oxygen pump main shaft bearing and preparation process thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114576271A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH355659A (en) * | 1955-12-17 | 1961-07-15 | Kugelfischer G Schaefer & Co | Process for the manufacture of roller bearing cages |
| JPS5117379Y2 (en) * | 1971-07-13 | 1976-05-11 | ||
| KR100664848B1 (en) * | 2006-02-08 | 2007-01-03 | 한국원자력연구소 | Low friction ball bearing |
| JP2007127199A (en) * | 2005-11-04 | 2007-05-24 | Nsk Ltd | Retainer for rolling bearing and rolling bearing |
| JP2007263279A (en) * | 2006-03-29 | 2007-10-11 | Jtekt Corp | Retainer of rolling bearing |
| CN103104607A (en) * | 2012-12-28 | 2013-05-15 | 瓦房店轴承集团有限责任公司 | Deep groove ball bearing of steel ball guiding solid retainer structure |
| JP2014020490A (en) * | 2012-07-19 | 2014-02-03 | Nsk Ltd | Roller bearing and pump device for liquid gas |
| WO2017043445A1 (en) * | 2015-09-10 | 2017-03-16 | Ntn株式会社 | Rolling bearing for extremely low temperature environments |
| CN109555783A (en) * | 2018-11-16 | 2019-04-02 | 洛阳汇工轴承科技有限公司 | Novel combined type bearing retainer |
-
2022
- 2022-03-16 CN CN202210261565.XA patent/CN114576271A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH355659A (en) * | 1955-12-17 | 1961-07-15 | Kugelfischer G Schaefer & Co | Process for the manufacture of roller bearing cages |
| JPS5117379Y2 (en) * | 1971-07-13 | 1976-05-11 | ||
| JP2007127199A (en) * | 2005-11-04 | 2007-05-24 | Nsk Ltd | Retainer for rolling bearing and rolling bearing |
| KR100664848B1 (en) * | 2006-02-08 | 2007-01-03 | 한국원자력연구소 | Low friction ball bearing |
| JP2007263279A (en) * | 2006-03-29 | 2007-10-11 | Jtekt Corp | Retainer of rolling bearing |
| JP2014020490A (en) * | 2012-07-19 | 2014-02-03 | Nsk Ltd | Roller bearing and pump device for liquid gas |
| CN103104607A (en) * | 2012-12-28 | 2013-05-15 | 瓦房店轴承集团有限责任公司 | Deep groove ball bearing of steel ball guiding solid retainer structure |
| WO2017043445A1 (en) * | 2015-09-10 | 2017-03-16 | Ntn株式会社 | Rolling bearing for extremely low temperature environments |
| CN109555783A (en) * | 2018-11-16 | 2019-04-02 | 洛阳汇工轴承科技有限公司 | Novel combined type bearing retainer |
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| PB01 | Publication | ||
| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Country or region after: China Address after: 471039 No. 96, Jianxi, Luoyang District, Henan, Jianshe Road Applicant after: Luoyang Bearing Group Co.,Ltd. Address before: 471039 No. 96, Jianxi, Luoyang District, Henan, Jianshe Road Applicant before: LUOYANG LYC BEARING Co.,Ltd. Country or region before: China |
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| CB02 | Change of applicant information |