CN101509518A - Elastic thrust block and production method thereof - Google Patents
Elastic thrust block and production method thereof Download PDFInfo
- Publication number
- CN101509518A CN101509518A CNA2009100108087A CN200910010808A CN101509518A CN 101509518 A CN101509518 A CN 101509518A CN A2009100108087 A CNA2009100108087 A CN A2009100108087A CN 200910010808 A CN200910010808 A CN 200910010808A CN 101509518 A CN101509518 A CN 101509518A
- Authority
- CN
- China
- Prior art keywords
- elastic thrust
- teflon
- thrust block
- modified
- cushion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2380/00—Electrical apparatus
- F16C2380/26—Dynamo-electric machines or combinations therewith, e.g. electro-motors and generators
Landscapes
- Sliding-Contact Bearings (AREA)
Abstract
The invention relates to an anti-thrust-used thrust pad of a water-turbine generator set. The elastic thrust pad takes a metal multiaperture elastic cushion as a substrate, the holes of which is internally filled with modified polyfluortetraethylene plastics and the surface is formed with a wearing layer. The modified polyfluortetraethylene plastics are prepared by the following raw materials according to the percentage by weight: 18-22% of copper powder, 2-3% of supramoly and 75-80% of polyfluortetraethylene. The lead powder is not added in the filling material polyfluortetraethylene of the elastic thrust pad and the added copper powder effectively increases the wearing resistance and thermal conduction of composite plastics spindle bushing. The supramoly is added for generating self-lubricating effect, thus reducing the coefficient of friction of composite plastics tiling and further increasing the wearing resistance. The elastic cushion is formed by pressing three standard copper springs, which greatly improves the uneven phenomenon of the porosity factor of the elastic cushion and causes the uniformity of the elasticity modulus of the product to be increased and the service performance to be stable.
Description
One, technical field:
The present invention relates to the thrust bearing shoe valve of the thrust position application of hydroelectric power unit, also relate to its method for making in addition.
Two, background technique:
At present; the thrust position of the hydraulic generator unit of the various capacity of China's production and use; adopt babbitt metal bearing; this watt ratio forces down; friction factor big (generally 0.5---0.2) adaptive temperature is low, the mechanically deformation and the thermal distortion of tiling can not self be adjusted, thereby cause oil film breakdown; tiling heavy wear is ablated, and causes serious accidents such as hydraulic generator unit shutdown.Existing for this reason people proposes to form wearing layer with teflon and the formulated plastics of lead powder as the stuffing of thrust bearing shoe valve and on its surface, but find in the practice, the wear-resisting property and the heat-conducting property of teflon and lead powder mixing wearing layer are relatively poor, and lead is heavy metal, and environmental pollution during production is unfavorable to staff's health, the matrix cushion is that a kind of specification copper spring compacting forms in addition, hole is inhomogeneous, so that the product Young's modulus is inhomogeneous, influences product performance.
Three, summary of the invention:
The objective of the invention is to overcome above-mentioned not enough problem, a kind of elastic thrust block is provided, friction factor is little, surface self-lubricating, but self adjust the distortion of tiling mechanical temperature; The present invention also provides its method for making in addition, and technology is simple to operation.
The technological scheme that the present invention is adopted for achieving the above object is: elastic thrust block, metal porous cushion is a matrix, filling-modified polytetrafluoroethylplastic plastic in the matrix hole, and surface formation wearing layer, modified Teflon is formulated by following raw material weight percentage: the 18-22% copper powder; 2-3% molybdenum disulfide, the 75-80% teflon.
Described modified Teflon plastics are preferably formulated by the heavy percentage of following raw material:
22% copper powder, 3% molybdenum disulfide and 75% teflon.
It is 1/2～1/3 of matrix that described modified Teflon plastics are filled the degree of depth, and the surface abrasion resistance layer thickness is 0.5-3mm.
Described cushion is that the copper spring compacting of three kinds of different sizes forms.
The manufacture method of elastic thrust block of the present invention, concrete technology is:
The first step prepares the cushion blank: with diameter is that the tin bronze wire of 0.2-0.4mm, 0.4-0.6mm and 0.6-0.8mm is wound in the spiral spring, its external diameter is respectively 2-4mm, 4-6mm and 6-8mm, length is 20-40mm, the spiral spring is placed in watt mould, on press machine, suppress, make the cushion blank, its porosity ratio is 40-60%;
Second step preparation modified Teflon: copper powder is sneaked in molybdenum disulfide and the teflon by weight, sieve 4-6 time with the 40-80 mesh sieve, it is standby to make modified Teflon;
The 3rd step compacting thrust bearing shoe valve: the cushion blank will be gone in the segmental pad mould modified Teflon of packing into uniformly then, compression moulding on press machine;
The 4th step sintering: the elastic thrust block of filled polytetrafluoroethylene is inserted in the sintering furnace, under hydrogen shield, carry out sintering.
The pressure of described the 3rd step compacting is 25-35MPa.
Described the 4th step sintering temperature is 375-395 ℃, constant temperature sintering 60-90 minute, and cooling is come out of the stove naturally.
Be not added with lead powder in the elastic thrust block packing material teflon of the present invention, wherein the copper powder of Tian Jiaing has effectively improved composite plastic wear-resistance of bearing pad and thermal conductivity; Cooperate and add molybdenum disulfide, produce self-lubricating effect, reduced the friction ractor of composite plastic tiling, further improve wear resistance again.Cushion is formed by the copper spring compacting of three kinds of specifications, has improved cushion porosity ratio non-uniform phenomenon greatly, makes product Young's modulus uniformity improve, and usability is stable.
Process step of the present invention is brief, the simple easy operating of process conditions, and it is good to make product performance.
Thrust bearing shoe valve material of the present invention can also be used as radially guide bearing block supporting skid rail of water work steel gate, replaces former bakelite slideway, has reduced door power, reduces dam door machine tonnage, can also solve the excessive phenomenon of the local contact force of former bakelite slideway and guide rail in addition.
Four, description of drawings:
Fig. 1 is a bearing shell tiling structural representation of the present invention.
Fig. 2 is a bearing shell tiling manufacturing process flow diagram of the present invention.
Five, embodiment:
Elastic thrust block as shown in Figure 1, watt base 4 is welded with copper wire cushion 2 by brazing layer 3, complex abrasion-proof layer 1 on the cushion 2, the copper spring compacting of three kinds of different sizes forms metal porous cushion as matrix, filling-modified polytetrafluoroethylplastic plastic in the matrix hole, filling the degree of depth is 1/2～1/3 of matrix, and surface formation 0.5-3mm wearing layer, and the modified Teflon plastics are formulated by the heavy percentage of following raw material: 22% copper powder, 3% molybdenum disulfide and 75% teflon.
The manufacture method of elastic thrust block as shown in Figure 2, concrete technology is:
The first step prepares the cushion blank: with diameter is that the tin bronze wire of 0.2-0.4mm, 0.4-0.6mm and 0.6-0.8mm is wound in the spiral spring, its external diameter is respectively 2-4mm, 4-6mm and 6-8mm, length is 20-40mm, the spiral spring is placed in watt mould, on press machine, suppress, make the cushion blank, its porosity ratio is 40-60%;
Second step preparation modified Teflon: copper powder is sneaked in molybdenum disulfide and the teflon by weight, sieve 4-6 time with the 40-80 mesh sieve, it is standby to make modified Teflon;
The 3rd step compacting thrust bearing shoe valve: the cushion blank will be gone in the segmental pad mould, and the modified Teflon of packing into uniformly then is 25-35MPa compression moulding at the press machine upward pressure;
The 4th step sintering: the elastic thrust block of filled polytetrafluoroethylene is inserted in the sintering furnace, carry out sintering under hydrogen shield, sintering temperature is 375-395 ℃, constant temperature sintering 60-90 minute, and cooling is come out of the stove naturally.
Embodiment 2:
Produce elastic thrust block according to embodiment's 1 described manufacture method, it is 1/2 of matrix that modified Teflon is filled the degree of depth, wearing layer thickness 0.5, and wherein modified Teflon is formulated by following raw material weight percentage: 20% copper powder; 2% molybdenum disulfide, 78% teflon.
Embodiment 3:
Produce elastic thrust block according to embodiment's 1 described manufacture method, it is 1/3 of matrix that modified Teflon is filled the degree of depth, wearing layer thickness 2.5mm, and wherein modified Teflon is formulated by following raw material weight percentage: 18% copper powder; 2% molybdenum disulfide, 80% teflon.
The elastic thrust block that the present invention makes performance data after testing is as follows:
Thermal conductivity (W/mk) 0.32
Thermal coefficient of expansion (cm/cm. ℃) 1.68 * 10
-5
Elastic membrane amount (MPa) 〉=1.9 * 10
3
Friction ractor (drop lubrication) 0.011-0.130
The coefficient of waste (drop lubrication)≤0.23.
Claims (7)
1, elastic thrust block, metal porous cushion is a matrix, filling-modified polytetrafluoroethylplastic plastic in the matrix hole, and surface formation wearing layer is characterized in that: the modified Teflon plastics are by adding gross weight 18-22% copper powder in the teflon; Gross weight 2-3% molybdenum disulfide.
2, elastic thrust block according to claim 1 is characterized in that: the modified Teflon plastics are formulated by the heavy percentage of following raw material:
22% copper powder, 3% molybdenum disulfide and 75% teflon.
3, elastic thrust block according to claim 1 and 2 is characterized in that: it is 1/2～1/3 of matrix that the modified Teflon plastics are filled the degree of depth, and the surface abrasion resistance layer thickness is 0.5-3mm.
4, elastic thrust block according to claim 1 and 2 is characterized in that: cushion is that the copper spring compacting of three kinds of different sizes forms.
5, the method for making of claim 1 or 2 described elastic thrust blocks is characterized in that: concrete technology is:
The first step prepares the cushion blank: with diameter is that the tin bronze wire of 0.2-0.4mm, 0.4-0.6mm and 0.6-0.8mm is wound in the spiral spring, its external diameter is respectively 2-4mm, 4-6mm and 6-8mm, length is 20-40mm, the spiral spring is placed in watt mould, on press machine, suppress, make the cushion blank, its porosity ratio is 40-60%;
Second step preparation modified Teflon: copper powder is sneaked in molybdenum disulfide and the teflon by weight, sieve 4-6 time with the 40-80 mesh sieve, it is standby to make modified Teflon;
The 3rd step compacting thrust bearing shoe valve: the cushion blank will be gone in the segmental pad mould modified Teflon of packing into uniformly then, compression moulding on press machine;
The 4th step sintering: the elastic thrust block of filled polytetrafluoroethylene is inserted in the sintering furnace, under hydrogen shield, carry out sintering.
6, the method for making of elastic thrust block according to claim 5 is characterized in that: the pressure of the 3rd step compacting is 25-35MPa.
The method for making of 7 elastic thrust blocks according to claim 5 is characterized in that: the 4th step sintering temperature is 375-395 ℃, constant temperature sintering 60-90 minute, and cooling is come out of the stove naturally.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100108087A CN101509518B (en) | 2009-03-20 | 2009-03-20 | Elastic thrust block and production method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100108087A CN101509518B (en) | 2009-03-20 | 2009-03-20 | Elastic thrust block and production method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101509518A true CN101509518A (en) | 2009-08-19 |
| CN101509518B CN101509518B (en) | 2010-12-29 |
Family
ID=41002019
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100108087A Expired - Fee Related CN101509518B (en) | 2009-03-20 | 2009-03-20 | Elastic thrust block and production method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101509518B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103195799A (en) * | 2013-04-02 | 2013-07-10 | 昆山佰亚高分子科技有限公司 | High-loading thrust bearing and manufacturing process thereof |
| CN106438675A (en) * | 2016-10-17 | 2017-02-22 | 武汉理工大学 | Tilting-pad thrust bearing supported through elastic disc |
| CN110552963A (en) * | 2019-07-30 | 2019-12-10 | 上海涟屹轴承科技有限公司 | method for preparing water-lubricated thrust bearing sector tile |
| CN112192920A (en) * | 2020-10-13 | 2021-01-08 | 安徽环嘉天一再生资源有限公司 | High-elasticity wear-resistant recycled plastic tile and preparation method thereof |
-
2009
- 2009-03-20 CN CN2009100108087A patent/CN101509518B/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103195799A (en) * | 2013-04-02 | 2013-07-10 | 昆山佰亚高分子科技有限公司 | High-loading thrust bearing and manufacturing process thereof |
| CN103195799B (en) * | 2013-04-02 | 2016-01-20 | 昆山佰亚高分子科技有限公司 | High-mechanic thrust bearing and preparation process thereof |
| CN106438675A (en) * | 2016-10-17 | 2017-02-22 | 武汉理工大学 | Tilting-pad thrust bearing supported through elastic disc |
| CN110552963A (en) * | 2019-07-30 | 2019-12-10 | 上海涟屹轴承科技有限公司 | method for preparing water-lubricated thrust bearing sector tile |
| CN112192920A (en) * | 2020-10-13 | 2021-01-08 | 安徽环嘉天一再生资源有限公司 | High-elasticity wear-resistant recycled plastic tile and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101509518B (en) | 2010-12-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100462165C (en) | Manufacture method and die for powder metallurgy inside spin ratchet wheel | |
| CN101509518B (en) | Elastic thrust block and production method thereof | |
| CN100567760C (en) | Powder metallurgy iron-based high-speed brake pad | |
| CN101644304B (en) | Metal base firing brake block with double-layer structure and manufacturing method thereof | |
| CN109666857B (en) | Plane sliding bearing with extremely low friction coefficient and preparation method thereof | |
| CN104763749A (en) | Heat-resistant metal matrix embedded solid self-lubricating bearing and preparation method thereof | |
| CN105215363A (en) | A kind of preparation method with the copper-base powder metallurgy part of densified surface | |
| EP1145788A4 (en) | Lubricating agent for mold at elevated temperature, iron-based powder composition for elevated temperature compaction with lubricated mold and high density formed product from iron-based powder composition, and method for producing high density iron-based sintered compact | |
| CN110964940B (en) | High-entropy alloy silver-impregnated composite material and preparation method and application thereof | |
| CN109482872B (en) | Oil-free plane sliding bearing with extremely low friction coefficient and preparation method thereof | |
| CN203565862U (en) | Mold for manufacturing powder metallurgy bearing outer ring | |
| CN104889405A (en) | Ceramimetallurgical high-nickel alloy bearing material | |
| CN1321791C (en) | Material of porous polyimide holder and molding technique | |
| CN105256159A (en) | Tungsten and copper composite material and application thereof | |
| CN103909258B (en) | Take kerosene as gear pump bearing material of medium and preparation method thereof | |
| CN103277514B (en) | The manufacturing process of cold isostatic press superhigh pressure sealing device and seal ring thereof | |
| CN201215139Y (en) | Blind hole enchased bearing with solid lubricant | |
| CN107234243A (en) | The manufacture method of the high-precision combined material oiliness bearing of low noise defrosting blower fan | |
| CN104889409A (en) | Manufacturing method of powder metallurgy ultra-low-noise long-service-life oil-retaining bearing | |
| CN205062576U (en) | Paper molding device's elasticity is floated and is supported mechanism | |
| CN105689708A (en) | Production process for HS311 steel-based copper plastic self-lubrication material | |
| CN114309615A (en) | Iron-based double-layer sintered material and preparation method thereof | |
| CN102825814A (en) | Manufacturing method of water lubricated bearing taking hard rubber as liner | |
| CN1834484A (en) | Environment protection elastic metallic plastic bush | |
| CN102979819A (en) | Metal plastic composite bearing pad and manufacturing method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101229 Termination date: 20150320 |
|
| EXPY | Termination of patent right or utility model |