CN105036714B - A kind of compressor of air conditioner Ceramic piston and preparation method thereof - Google Patents
A kind of compressor of air conditioner Ceramic piston and preparation method thereof Download PDFInfo
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- CN105036714B CN105036714B CN201510449463.0A CN201510449463A CN105036714B CN 105036714 B CN105036714 B CN 105036714B CN 201510449463 A CN201510449463 A CN 201510449463A CN 105036714 B CN105036714 B CN 105036714B
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Abstract
The invention discloses a kind of High-Alumina piston containing zircon ceramic and preparation method thereof.Its raw material proportioning is as follows：Active industry Al2O3Micro mist 45~70%, plasticity is good, containing Al2O3>=28% clay 15~25%；Zircon 2~8%, containing K2The potassium feldspar 4~12% of O >=10%, dolomite 2~8%, talcum 1~10%, rare earth oxide 0~3%；The additional plasticizer 1~3% being made up of polyvinyl alcohol and carboxymethyl cellulose etc..Above-mentioned raw materials are weighed by recipe requirements, add water mixing, fine grinding, filter-press dehydration, vacuum pugging, extrusion forming, dry to constant weight, carry out roughing.Rough machined blank is fired into fine and close porcelain piece in 1300 DEG C or so, then it is finished, the Ceramic piston of required precision is made up to.The piston density is small, hardness big, for that in compressor of air conditioner, can reduce fretting wear and power attenuation between air-conditioning hermetic compressor cylinder with matching or rolling piston, can significantly improve the thermal efficiency of air-conditioning.
Description
Technical field
The present invention relates to Compressor Technology field, specifically, it is related to a kind of compressor of air conditioner Ceramic piston and its system
Preparation Method.
Background technology
Compressor is the heart of all kinds of air-conditionings and refrigerator apparatus, is also the important point of penetration that these device energy conservations are taped the latent power.Often
The Frequency Conversion Compressor seen mainly has vortex and rotary two kinds.The refrigerator relatively small to refrigerating capacity, room air conditioner
For air-conditioner set, rotary compressor is because its small volume, lightweight, part are few, rotation speed change scope is big, good reliability,
The small, noise of vibration is low, operational efficiency is higher, and performance and price is higher, and standby popular to people.Piston is rotary air conditioner compression
The critical component of machine.
Hermetic compressor for air-conditioning and refrigerator mainly includes eccentric part and rolling piston.Eccentric part outer surface
It is upper that rolling piston is housed.Rolling piston is driven to rotate by eccentric part by motor, the rolling piston freely rotated exists around cylinder
Eccentric rolling is done under eccentric part guiding, shell inwardly sets slide plate, and slide plate arc end part is tightly pressed against the appearance of rolling piston
Face, remains and is contacted with rolling piston outer surface, cylinder is divided into suction muffler and compression chamber.Motor is driven by crank up
Rolling piston rotary motion, while driving slide plate to be moved back and forth in vane slot, cylinder is repeated to make air-breathing, compression, is vented and remaining
The work such as gap expansion, so as to complete the temperature adjustment effect of air-conditioning and refrigerator.
In the hermetic compressor configuration of air-conditioning and refrigerator, the top of slide plate and outer surface of piston are sliding contacts.Now
The piston of most of air-conditionings and freezer compressor is all prepared using materials such as stainless steel or cast irons, and this has the following disadvantages：
1) the service life requirement of refrigeration air-conditioner and freezer compressor was at 10 years or so, and the anti-wear performance of metal material is paid no attention to
Think, after wearing and tearing for a long time, serious loss can be caused, can even drop metal fillings on slide plate top sometimes, and metal fillings can
Compressor can be blocked, and compressor is caused damage.Ceramic material wearability is good, can improve the use longevity of compressor of air conditioner
Life.
2) piston in compressor is the important core part of air-conditioning, and stainless steel or cast iron density are high, long-play, energy
Amount consumption is larger.And ceramic material density is low, less than the 1/2 of metal material, the energy in compressor operation can be significantly reduced
Consumption.
3) metal slide plate thermal conductivity is good, and heat-insulating property is not good, reduces the heat exchanger effectiveness of air-conditioning and refrigerator.And ceramics are living
Fill in heat-insulating property good, it is lightweight, it is the preferable material of compressor piston.
The patent of invention of Application No. 201410025579.7 disclose a kind of rotary vane type compressor ceramic sliding blade and its
Preparation method, it is proposed that rotary compressor is with the formula range of ceramic sliding blade material：Al2O3Powder：90~99.9%；
Y2O3Powder：0.1~10%；SiO2Powder：0~1%；CeO2Powder：0~1%；Li2O powder：0~1%；MOS2Powder：0~
1%.It is required that particle mean size≤100nm of these raw materials.Preparation process includes following steps：1) using coprecipitation point
Al is not prepared2O3Powder；Y2O3Powder；SiO2Powder；CeO2Powder；LiO2Powder；MOS2Powder；2) again will be obtained various
Nanometer powder kneads into the feeding with thermal fluidity with forming agent (0.8~1.2 weight % polyvinyl alcohol)；3) feeding is in note
Injection molding in molding machine, obtains base substrate；4) forming agent is discharged by being heated to base substrate again；5) in 1400-1600 DEG C of sintering
Obtain corresponding product.The invention is emphasized can be by selecting hot pressing sintering method, hot isostatic pressing method, reaction sintering and microwave sintering method
At least one carry out the sintering, and be preferred to use hot pressing sintering method and hot isostatic pressing method is sintered.The invention product is used
In sealing compressor of air conditioner, good polishing machine can be obtained, is reduced and sealing air-conditioning compressor cylinder with matching
Or abrasion and frictional dissipation between rolling piston, and thermal insulation is good, improves the heat exchanger effectiveness of air-conditioning.
Invention ceramics manufacture piston of air-conditioning compressor, with good novelty.But the raw material used in the invention is put down
Equal granularity≤100nm, will also by coprecipitation and the synthetically prepared material powder of other methods, manufacturing process length, complex process,
Cause the prices of raw materials expensive：The invention is molded using injection moulding, is burnt using hot pressing sintering method, hot isostatic pressing method, reaction
At least one of connection and microwave sintering method is burnt till, and manufacturing process is complicated, and cost is high.In addition, the invention is without reference to ceramic member
Finishing.
According to compressor of air conditioner feature, the Ceramic piston that industrialized production can be achieved is developed, is had great importance.
The content of the invention
According to advanced ceramics technology of preparing, the present invention has targetedly carried out combined innovation, overcome in the prior art
It is not enough there is provided a kind of preparation method of compressor of air conditioner Ceramic piston, prepared material hardness is high, wearability is good,
Thermal insulation is excellent.Prepared density of material is 2.9~3.2g/cm3, alleviates the weight of piston, improves the energy of air conditioner
Measure utilizing status.
The present invention is achieved by the following technical solutions：A kind of Ceramic piston for compressor of air conditioner, its raw material is matched somebody with somebody
Side is as follows：Active commercial alumina micro mist：45~70wt%；Clay：15~25wt%；Zirconium silicate；2~8wt%；Feldspar：4~
12wt%；Dolomite：2~8wt%；Talcum：1~10wt%；Rare earth：0~3wt%；Plasticizer (additional)：1~3wt%.
Used rare earth is the compound of lanthana and one or both of yittrium oxide in formula.It is used in formula
Clay Al2O3Content is more than 28%, index of plasticity >=2.0 or plasticity index >=20.
Described plasticizer is made up of polyvinyl alcohol and carboxymethyl cellulose etc..
A kind of Ceramic piston for compressor of air conditioner, its preparation technology engineering is as follows：By recipe requirements, accurate weighing institute
The various raw materials needed, are placed in grinder add water mixing, fine grinding, reach after defined granularity requirements, filter-press dehydration, vacuum are practiced
Mud, extrusion forming, drying, obtain the dry body that rupture strength is more than 6MPa.Appropriate roughing is carried out to dry body, then at 1300
DEG C or so at a temperature of burn till, obtained porcelain piece, then the Ceramic piston of serial finishing, as finished product is carried out to porcelain piece；
In a kind of Ceramic piston for compressor of air conditioner, its preparation technology used grinder be mainly ball mill,
One or more combinations of Ball-stirring mill and sand mill；
A kind of Ceramic piston of compressor of air conditioner, in its preparation process, using two sections of machinings, is allowed to meeting
On the premise of machining accuracy, the workload of finishing is reduced as far as possible, to reduce manufacturing cost.In order to effectively realize two sections of machines
Processing is, it is necessary to stabilizing technical processes as far as possible, the accurate drying shrinkage and percent of firing shrinkage for determining base substrate.
With method disclosed by the invention prepare Ceramic piston, not only with very high rigidity, good decay resistance and
Relatively low coefficient of friction, for sealing in compressor of air conditioner, can obtain good polishing machine, reduce the sealing air-conditioning that matches therewith
Abrasion and friction loss between compresser cylinder or rolling piston, so as to improve effect of compressor of air conditioner.
The prominent features of the present invention, using the raw material of industry cheap and easy to get, using the production technology similar to conventional ceramic
Method, by strict technical process control, on the basis of drying shrinkage and percent of firing shrinkage is accurately determined, using to drying
Rear blank carries out roughing, then to burning till after " two sections are processed " pattern for being finished of fine and close porcelain piece, improve product
Qualification rate, reduce production cost.
Embodiment：
Slided with Reactive alumina, high plasticity and high associativity kaolin, zirconium silicate, potassium feldspar, dolomite, calcining
Stone, lanthana, cerium oxide etc. are raw material, have prepared 5 formulas, its formula table is shown in Table 1, and corresponding chemical composition is listed in Table 2 below.
Plasticiser is additional, does not calculate and is formulated among composition.Material trial-production has been carried out to each formula, has obtained and can be used for filling
The Ceramic piston of machine.
The formula table (wt%) of the Ceramic piston of table 1
The chemical composition of 2 embodiment of table, 5 formulas
According to designed formula, the various raw materials of accurate weighing are placed in ball mill add water mixing, fine grinding, until slurry
Middle raw material granularity D50At≤10 μm, blowing, filter-press dehydration, vacuum pugging, extrusion forming, drying obtain rupture strength and are more than
6MPa dry body.Appropriate roughing is carried out to dry body, is burnt till at a temperature of 1300 DEG C or so, has obtained fine and close porcelain piece, then
The Ceramic piston of serial finishing, as finished product is carried out to porcelain piece.
The ceramics of above-mentioned 5 formulas can be cooked at 1300 DEG C, the rupture strength of resulting ceramic strip >=
175MPa, and with very high rigidity, good wearability and relatively low coefficient of friction, can in the hermetic compressor of air-conditioning
The abrasion and friction loss matched therewith between sealing air-conditioning compressor cylinder or rolling piston is substantially reduced, so as to improve air-conditioning
Effect and service life of compressor.
One of key point of the present invention, is in Ceramic piston preparation process to add, it is necessary to carry out two sections of machines to base substrate
Work, is allowed to meeting in the premise of machining accuracy, the amount of finishing is reduced as far as possible, to reduce manufacturing cost.In order to ensure to add
The precision of work requires accurate and determines the dry of base substrate, it is necessary to stabilizing technical processes as far as possible, dry body strength will reach more than 6MPa
Dry shrinkage factor and percent of firing shrinkage.
Finally it should be noted that：These are only the preferred embodiments of the present invention and oneself, be not intended to limit the invention although
The present invention is described in detail with reference to embodiment, for those skilled in the art, it still can be to foregoing
Technical scheme described in each embodiment is modified, or to which part technical characteristic carry out equivalent substitution, but it is all
Within the spirit and principles in the present invention, any modification, equivalent substitution and improvements made etc. should be included in the protection of the present invention
Within the scope of.
Claims (6)
1. a kind of High-Alumina piston containing zircon ceramic for compressor of air conditioner, it is characterised in that prepare the High-Alumina containing zircon ceramic
The composition of raw materials of piston is as follows：Reactive alumina：45~70 wt%；Clay：15~25 wt%；Zirconium silicate：2~8 wt%；
Containing K2The potassium feldspar of O >=10%：4~12 wt%；Dolomite：2~8 wt%；Talcum：1~10 wt%；Rare earth oxide：0~3
wt%；Plasticizer：1~3 wt%；High-Alumina piston containing the zircon ceramic preparation process is as follows：
Various raw materials as used in recipe requirements accurate weighing, are placed in grinder add water mixing, fine grinding, until raw material in slurry
Granularity D50At≤10 μm, then filter-press dehydration, vacuum pugging, extrusion forming, drying, rupture strength >=6MPa dry body is can obtain,
Roughing is carried out to it；Burnt till at 1300 DEG C, obtain the porcelain piece of densification；Porcelain piece is finished again, you can obtain
Ceramic piston.
2. a kind of High-Alumina piston containing zircon ceramic for compressor of air conditioner according to claim 1, it is characterised in that system
The grinder being previously mentioned in standby technique is one or more combinations of ball mill, Ball-stirring mill and sand mill.
3. a kind of High-Alumina piston containing zircon ceramic for compressor of air conditioner according to claim 1, it is characterised in that system
In standby technical process, two sections of machinings are taken：First carried out roughing to dried blank, then to burning till after fine and close porcelain
Part is finished.
4. a kind of High-Alumina piston containing zircon ceramic for compressor of air conditioner according to claim 1, it is characterised in that institute
The rare earth oxide stated is the compound of lanthana and one or both of yittrium oxide.
5. a kind of High-Alumina piston containing zircon ceramic for compressor of air conditioner according to claim 1, it is characterised in that institute
The clay Al stated2O3Content >=28%, index of plasticity >=2.0 or plasticity index >=20.
6. a kind of High-Alumina piston containing zircon ceramic for compressor of air conditioner according to claim 1, it is characterised in that：Institute
The plasticizer stated is made up of polyvinyl alcohol and carboxymethyl cellulose.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510449463.0A CN105036714B (en) | 2015-07-28 | 2015-07-28 | A kind of compressor of air conditioner Ceramic piston and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510449463.0A CN105036714B (en) | 2015-07-28 | 2015-07-28 | A kind of compressor of air conditioner Ceramic piston and preparation method thereof |
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| CN105036714A CN105036714A (en) | 2015-11-11 |
| CN105036714B true CN105036714B (en) | 2017-09-12 |
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Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1309680C (en) * | 2003-07-09 | 2007-04-11 | 山东硅苑新材料科技股份有限公司 | Low-temperature sintered complex phase abrasion resistant ceramic material |
| US8207077B2 (en) * | 2007-10-29 | 2012-06-26 | Kyocera Corporation | Abrasion-resistant sintered body, sliding member, and pump |
| CN103073269A (en) * | 2011-11-18 | 2013-05-01 | 常熟市创新陶瓷有限公司 | Alumina ceramic and preparation method thereof |
| CN103396094B (en) * | 2013-08-07 | 2014-09-17 | 福建省德化永惠尔红壤土陶艺有限公司 | Special clay and manufacturing method thereof |
| CN103496952A (en) * | 2013-09-25 | 2014-01-08 | 安徽巨盛新材料科技有限公司 | Zirconia toughened alumina ceramic cylinder sleeve |
| CN103496953A (en) * | 2013-09-25 | 2014-01-08 | 安徽巨盛新材料科技有限公司 | Preparation technology of ceramic cylinder liner of drilling mud pump |
| CN103833337B (en) * | 2014-01-20 | 2016-04-27 | 佛山市高明区生产力促进中心 | Ceramic sliding vane for rotary vane compressor and preparation method thereof |
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