CN106866149A - A kind of preparation method of carborundum based material mechanical seal slide unit - Google Patents
A kind of preparation method of carborundum based material mechanical seal slide unit Download PDFInfo
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- CN106866149A CN106866149A CN201710149529.3A CN201710149529A CN106866149A CN 106866149 A CN106866149 A CN 106866149A CN 201710149529 A CN201710149529 A CN 201710149529A CN 106866149 A CN106866149 A CN 106866149A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
- C04B35/56—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides
- C04B35/565—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides based on silicon carbide
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/62605—Treating the starting powders individually or as mixtures
- C04B35/6261—Milling
- C04B35/62615—High energy or reactive ball milling
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
- C04B35/632—Organic additives
- C04B35/634—Polymers
- C04B35/63448—Polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C04B35/63472—Condensation polymers of aldehydes or ketones
- C04B35/63476—Phenol-formaldehyde condensation polymers
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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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/26—Sealings between relatively-moving surfaces with stuffing-boxes for rigid sealing rings
- F16J15/30—Sealings between relatively-moving surfaces with stuffing-boxes for rigid sealing rings with sealing rings made of carbon
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/42—Non metallic elements added as constituents or additives, e.g. sulfur, phosphor, selenium or tellurium
- C04B2235/422—Carbon
- C04B2235/425—Graphite
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/658—Atmosphere during thermal treatment
- C04B2235/6581—Total pressure below 1 atmosphere, e.g. vacuum
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
- C04B2235/963—Surface properties, e.g. surface roughness
- C04B2235/9638—Tolerance; Dimensional accuracy
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- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mechanical Engineering (AREA)
- Mechanical Sealing (AREA)
- Ceramic Products (AREA)
- Sealing Material Composition (AREA)
Abstract
The invention discloses a kind of preparation method of carborundum based material mechanical seal slide unit, it is first to prepare carbon compound, then carbon compound is mixed with pressureless sintering carborundum powder, and sintering is made blank after mixing, then is finished product by blank attrition process.The present invention also shortens the process cycle for preparing carborundum based material while the performances such as elevating mechanism sealing slide unit slip, reduces production cost.
Description
Technical field
The present invention relates to a kind of preparation method of mechanical seal slide unit, more particularly to a kind of carborundum based material
The preparation method of mechanical seal slide unit.
Background technology
Mechanical seal refer to by least one pair of perpendicular to rotation axis end face in Fluid pressure and compensation mechanism elastic force（Or
Magnetic force）In the presence of and the cooperation of auxiliary seal under keep laminating and constituted with respect to slip prevent fluid leak dress
Put.Main mechanical seal slide unit is included that rotating ring and stationary ring etc., i.e. mechanical seal are mainly and is affixed by rotating ring and stationary ring
Merge the relative slip working face for sliding to prevent what fluid from leaking.
A kind of sealing slide unit containing carborundum is proposed in the prior art, and carborundum is that a kind of heat resistance is good
Good, Young's modulus high, hard and low abrasion friction pair component materials can be realized, but due to carbofrax material self-lubricating in itself
Property lack, therefore use carborundum sealing friction pair part have be difficult to fluid produce lubricity lack dry environment
The lower problem for using.On the other hand, because in working order, phase mutual friction between friction pair rotating ring and stationary ring is cooled down no
Dry friction is produced in the environment of liquid, causes the acute liter of product operating ambient temperature, easily cause other parts in assembly（Such as rubber parts）
It is aging, final seal failure.Then, a kind of being made up by adding carbon in carbofrax material appearance is had also been proposed in the prior art
State the technology of problem.
At present, technical staff is to be improved scheme for the sealing slide unit containing carborundum as follows：
1st, carborundum seal in use, because rotating ring and the seal face flatness of stationary ring two are very high, can reach flat
Face degree is 0.0009mm, adhesive phenomenon is easily produced, under static state during starting device, due to rotating ring and the sealed end of stationary ring two
The suction-combining force in face is very big, easily makes seal produce abrasion to be even broken, so as to influence the service life of product；
Regarding to the issue above, application publication number is CN103641482A, and Shen Qing Publication day is the Chinese invention on March 19 in 2014
Patent discloses a kind of preparation method of self-lubricating silicon carbide ceramic sealing material, and the method is comprised the following steps：1）Raw material
Mixing：Submicron order α type carborundum 70-90%, boron carbide 0.1-3%, resin 3-15%, organic matter are bonded by weight percentage
Agent 5-20%, lubricant 0.5-10%, addition pure water carries out wet-mixing, the material that will be mixed after 6-48 hours in being put into batch mixer
Starched 60-120 mesh sieves；2）Mist projection granulating：Slurry is granulated by mist projection granulating tower after being sieved in above-mentioned steps, and spraying is made
180-260 DEG C of grain tower inlet temperature, 60-120 DEG C of outlet temperature, the premixing flour after granulation is sieved with 60-120 mesh sieves, institute
The premixing flour apparent density produced reaches 0.85-0.90 g/cm3, and mobility reaches 8-11 s/30g；3）Compression molding：Root
Mould is chosen according to required article shape, above-mentioned premixing flour is loaded in mold cavity, molding preformation is carried out with 50-200MPa pressure
Type；Or after above-mentioned molding is preforming, then isostatic pressed is carried out with 200-300MPa pressure, obtain molded blank；4）Vacuum-sintering：Will
The blank that above-mentioned steps are prepared, being put into vacuum sintering furnace carries out vacuum-sintering, and sintering step is：Blank is loaded into vacuum to burn
After freezing of a furnace, sintering furnace is vacuumized, after vacuum reaches 3-5 × 10-2Pa, after argon gas to normal pressure is led in sintering furnace
Heated, heating-up temperature is with the relation of time：Room temperature to 800 DEG C, 5-8 hours, be incubated 0.5-1 hours, from 800 DEG C to
2000-2300 DEG C, 6-9 hours, 1 to 2 hours are incubated, furnace cooling afterwards is down to room temperature and is come out of the stove；5）Processing：By above-mentioned vacuum
Blank after sintering by drawing, it is processed after self-lubricating silicon carbide ceramic seal part finished product.
2nd, the spherical micropore skewness of ring surface is sealed, makes the contact of the dynamic and static ring of silicon carbide ceramic seal device
Lubricant medium skewness between face, easily produces adhesive phenomenon, because the suction-combining force is very big when start machine, easily makes
Seal produces abrasion even fracture so as to influence the service life of product；
Regarding to the issue above, application publication number is CN103922743A, and Shen Qing Publication day is the Chinese invention on July 16 in 2014
Patent discloses a kind of preparation method of the silicon carbide sealed ring with spherical micropore, and the method is comprised the following steps：
1）The mixing of raw material：By weight percentage by submicron order α types carborundum, the boron carbide of 0.1-5%, the 10- of 70-80%
20% nanometer carbon black, the organic matter binding agent of 5-18%, the pore creating material with regular spherical of 1-20%, be put into batch mixer plus
After entering pure water and carrying out wet-mixing 6-48 hours, the slurry that will be mixed crosses 60-240 mesh sieves；2）Spray drying：After sieving
Slurry first passes through spray drying tower and is spray-dried, and the inlet temperature of spray drying tower is 180-260 DEG C when drying, outlet temperature
60-120 DEG C of degree, the material after granulation crosses 60-120 mesh sieves；Material apparent density after granulation is 0.80-0.95g/cm3, flowing
Property is 8-12s/30g；3）Compression molding：Mould is chosen according to required article shape, the material after above-mentioned granulation is loaded into mould
In die cavity, 50-200MPa pressure carry out molding it is preforming after, then isostatic pressed is carried out with 60-300MPa pressure, by what is suppressed
Green compact, be put into baking oven 150 DEG C or so dry solidification 2-6 hours；4）Vacuum-sintering：By the green compact of above-mentioned steps dry solidification,
It is put into heating furnace, is warming up to 400 DEG C, insulation carries out pre-sintering for 20-60 minutes, after the green compact after pre-sintering are cooled to room temperature
Be put into vacuum sintering furnace, be warming up under an argon atmosphere 2000-2300 DEG C carry out vacuum-sintering after, obtain with spherical closed
The sintered body of microcellular structure；5）Processing：By the blank after above-mentioned vacuum-sintering by drawing, must have after processed spherical micro-
The silicon carbide sealed ring in hole.
3rd, composite silicon carbide ceramic material operationally easily produces abrasion to be even broken, so as to influence the use longevity of product
Life；
Regarding to the issue above, application publication number is CN104671791A, and Shen Qing Publication day is the Chinese invention on June 3 in 2015
Patent discloses a kind of preparation method of the composite ceramic-based encapsulant of self-lubricating silicon carbide, by the raw material system of following weight portion
Into：Carborundum 70-90, powder of stainless steel 8-12, molybdenum bisuphide 5-7, carbon dust 2-5, magnesia 2-3, silane coupler KH-
5501-2, boron fibre 4-5, Kynoar 2-3, polyvinylpyrrolidone 1-2, sintering aid 3-5, deionized water 80-100；
The sintering aid is to be made from the following raw materials in parts by weight：Aluminum oxide 3-5, yittrium oxide 1-2, ammonium chloride 2-3, nitric acid iridium 5-7,
Carbon nano-particle 4-6, clay powder 4-5, dimethicone 1-2, atoleine 2-4, silane resin acceptor kh-550 1-2, artificial gold
Hard rock powder 2-4, vinyl acetate resin 2-3, tricresyl phosphate 1-2, purified water 3-5；Preparation method is by aluminum oxide, oxidation
The mixing of yttrium, nitric acid iridium, carbon nano-particle and artificial diamond powder is added in batch mixer, adds vinyl acetate resin and purified water
Wet-mixing is carried out, the slurry that will be mixed after 2-3 hours was ground 100-200 mesh sieves in being added to rubber mill, and heating is dry
Dry removing moisture, adds remaining remaining composition and stirs, and will be made particle in the material input mist projection granulating tower of gained
.
4th, mechanical seal SiC/ graphite diphase ceramic materials, the self-lubricating property of carborundum machinery sealing material, bending resistance
Intensity and fracture toughness are relatively low；
Regarding to the issue above, application publication number is CN106064946A, and Shen Qing Publication day is the Chinese invention on November 2 in 2016
Patent discloses a kind of preparation method of mechanical seal SiC/ graphite diphase ceramic materials, comprises the following steps：(1), with carbon
100 parts of SiClx powder, 0.1 part~1 part of boron carbide, 5 parts~30 parts of graphite powder, 0.5 part~15 parts of binding agent, pressing aid lubricant
0.5 part~5 parts, 0.5 part~1.5 parts constitutive materials of dispersant；Above-mentioned part is mass parts；Added after raw material is uniformly mixed to going
In ionized water, ball milling mixing is configured to the water base carborundum that solid phase weight content is 40%~60% after 12 hours~24 hours
Composite mortar；(2) above-mentioned water base silicon carbide compound slurry is spray-dried using atomizing granulating technology, graphitiferous is obtained
Silicon carbide granulating powder；(3) 120MPa dry-pressing precompressed and 200Mpa isostatic cool pressing ends are used to above-mentioned graphitiferous silicon carbide granulating powder
The two step approach shaping of pressure, obtains highdensity SiC/ graphite complex phase ceramic base substrate；(4) by the encapsulant of above-specified high density
Base substrate is placed in vacuum non-pressure sintering furnace, is warming up to 2000 DEG C~2100 DEG C, is incubated 1 hour~1.5 hours, after terminating,
Obtain mechanical seal SiC/ graphite diphase ceramic materials.
As can be seen that technical staff is when sealing sliding part containing carborundum is improved from above-mentioned patent document, the
1）With regard to first directly carrying out hybrid process with carborundum and other additives in step, therefore, technical staff is by adding carbon come more
It is also often directly directly to carry out hybrid process by carborundum and carbon during the problems such as mending the sliding capability of carbofrax material appearance.
But this preparation method is implemented all has that process cycle is long, production cost.
To sum up, a kind of preparation method of carborundum based material mechanical seal slide unit how is designed, it is being carried
Can also shorten the process cycle for preparing carborundum based material while rising the performances such as mechanical seal slide unit slip, reduce
Production cost is the technical problem for being badly in need of solving.
The content of the invention
The technical problems to be solved by the invention are directed to defect present in prior art, there is provided a kind of silicon carbide-based multiple
The preparation method of condensation material mechanical seal slide unit, it also contracts while the performances such as elevating mechanism sealing slide unit slip
The short process cycle for preparing carborundum based material, reduces production cost.
In order to solve the above technical problems, the technical solution used in the present invention is：A kind of carborundum based material machinery
The preparation method of slide unit is sealed, it is first to prepare carbon compound, then carbon compound is mixed with pressureless sintering carborundum powder,
Sintering is made blank after mixing, then is finished product by blank attrition process.
Preferably, the preparation process of carbon compound is：
A, by weight, takes 10~40 parts of graphite powder, 0.5~5 part of dry powder bonding agent, by above graphite powder and dry powder bonding agent group
Into dry mash be put into mixing tank, after sealing on ball mill ball milling 70~100 minutes, pour into kneader after being sufficiently mixed
In；
B, startup kneader start stirring 70~100 minutes and the temperature of kneader are progressively risen into 110~120 DEG C, by dry powder
After moisture evaporation is clean in material, then progressively it is cooled to 80~90 DEG C；
C, by weight, takes 7~15 parts of resin, 3~6 parts of alcohol, 0.1~1 part of oleic acid, will above material add container in stir
Resin adhesive is formed uniformly, then resin adhesive is poured into kneader, now by kneader temperature control 50~60
DEG C, after the resin adhesive and dry mash in kneader are fully mediated into stirring 2~3 hours, then kneader is progressively warming up to
75~85 DEG C of evaporation alcohol, are then shut off kneader；
D, the resin adhesive and the mixture of dry mash in kneader are placed on old in kneader drying in the shade；
E, dry in the shade after taken out from kneader and crush in the mixture feeding pulverizer of resin adhesive and dry mash, mistake on demand
Sieve forms carbon compound.
Preferably, when stirring dry mash in the b step, carried out every 10 minutes impellers of control kneader positive and negative
Modulation is whole once.
Preferably, when resin adhesive being poured into kneader in the step c, resin adhesive need to be made to be impregnated with completely and is pinched
Dry mash in conjunction machine, if resin adhesive is very few, supplements alcohol, until the dry mash being impregnated with completely in kneader.
Preferably, when kneader to be progressively warming up to 75~85 DEG C of evaporation alcohol in the step c, kneader is kept again
Stirring 15~20 minutes, then turns off kneader.
Preferably, graphite powder is by a diameter of 10 microns~30 microns of artificial spherical graphite system in a steps
Into.
Preferably, it is described to mix carbon compound with pressureless sintering carborundum powder, blank is made after mixing, then blank is ground
The specific steps that mill is processed as finished product include：
1）, obtained carbon compound in the step e mixed with pressureless sintering carborundum powder；
2）, the mixture of obtained carbon compound and pressureless sintering carborundum powder in the step e suppressed by dry-pressing mode
Shaping, then without pressure vacuum-sintering to 2100~2200 DEG C, natural cooling obtains blank；
3）, by blank attrition process be mechanical seal slide unit.
Preferably, the 1st）By when obtained carbon compound mixes with pressureless sintering carborundum powder in the step e in step,
Carbon compound accounts for the percentage by weight ＞ 0.1% and≤10% of whole carbon compound and the mixture of pressureless sintering carborundum powder.
Preferably, the described 3rd）In the slip working face of the mechanical seal slide unit that step is made, carbon area accounts for whole
The individual area ratio for sliding working face is ＞ 1% and ＜ 10%.
Preferably, the described 3rd）The arithmetic average roughness of the slip working face of the mechanical seal slide unit that step is made
More than 0.01 μm and ＜ 1 μm of Ra ＞.
The beneficial effects of the present invention are：The present invention recycles carbon compound and carbon by first preparing a kind of carbon compound
SiClx raw material carries out hybrid process, thus also shortens preparation while the performances such as elevating mechanism sealing slide unit slip
The process cycle of carborundum based material, reduces production cost.By designing the preparation method of carbon compound, carbon can be improved
Dispersiveness so that carbon is distributed approximately evenly between carborundum, so that finished product has the carborundum of hard, low abrasion special
Levy while having good sliding capability and sealing property.By by the weight between the carbon compound and sic raw material that are made
Amount percentage is designed, and can further improve the dispersiveness of carbon, so as to further improve the sliding capability and sealing of finished product
Energy.
Brief description of the drawings
Fig. 1 is the dimensional structure diagram of the mechanical seal slide unit that the embodiment of the present invention 1 is made；
Fig. 2 is the microphotograph of the slip working face of the mechanical seal slide unit that the embodiment of the present invention 1 is made；
Fig. 3 is the microphotograph of the slip working face of another mechanical seal slide unit that the embodiment of the present invention 1 is made；
In figure：1. mechanical seal slide unit, 111. slide working faces.
Specific embodiment
Further details of elaboration is done to technical scheme with specific embodiment below in conjunction with the accompanying drawings.
Embodiment 1：A kind of preparation method of carborundum based material mechanical seal slide unit, it is first to prepare carbon to mix
Material is closed, then carbon compound is mixed with pressureless sintering carborundum powder, sintering is made blank after mixing, then is by blank attrition process
Finished product.Applicant has found by research, in the prior art, when carrying out various improvement to the sealing slide unit containing carborundum
When, sic raw material and other additives are directly first typically all carried out into hybrid process, first patent such as in background technology
Document（Application publication number is CN103641482A）In the 1st）Just directly by submicron order α types carborundum and carbonization in step
Addition pure water carries out wet-mixing during boron, resin, organic matter binding agent, lubricant are put into batch mixer；In second patent document
（Application publication number is CN103922743A）In the 1st）In step by submicron order α types carborundum and boron carbide, nanometer carbon black,
Addition pure water carries out wet-mixing during organic matter binding agent, the pore creating material with regular spherical are put into batch mixer；At the 3rd specially
Sharp document（Application publication number is CN104671791A）In the 1st）In step by carborundum and powder of stainless steel, molybdenum bisuphide,
Magnesia and deionized water are processed in being added to ball grinder；In the 4th patent document（Application publication number is
CN106064946A）In the 1st）In step by silicon carbide powder and boron carbide, graphite powder, binding agent, pressing aid lubricant, point
Powder constitutive material is processed.Therefore, in the prior art for the performance such as self-lubricating for improving carbofrax material when, generally also
It is that, directly by carborundum and carbon hybrid process, the technological process of this existing preparation method is more, formula is complicated, so as to there is work
The problems such as skill cycle is long, production cost is high, and be first to prepare a kind of carbon compound in the present embodiment, recycle carbon compound and carbon
SiClx raw material carries out hybrid process, thus also shortens preparation while the performances such as elevating mechanism sealing slide unit slip
The process cycle of carborundum based material, reduces production cost.
The preparation process of carbon compound is：
A, by weight, takes 10 parts of graphite powder, 0.5 part of dry powder bonding agent, by above graphite powder and dry powder bonding agent constitute it is dry
Powder is put into mixing tank, after sealing on ball mill ball milling 70 minutes, poured into kneader after being sufficiently mixed；
B, startup kneader start stirring 70 minutes and the temperature of kneader are progressively risen into 110 DEG C, and moisture content in dry mash is steamed
After hair shaft is net, then progressively it is cooled to 80 DEG C；
C, by weight, takes resin（It is preferred that using phenolic resin）7 parts, above material is added and held by 3 parts of alcohol, 0.1 part of oleic acid
Stir to form resin adhesive in device, then pour into kneader resin adhesive, now by kneader temperature control
At 50 DEG C, after the resin adhesive and dry mash in kneader are fully mediated into stirring 2 hours, then kneader is progressively warming up to
75 DEG C of evaporation alcohol, are then shut off kneader；
D, the resin adhesive and the mixture of dry mash in kneader are placed in kneader and dried in the shade for old more than 12 hours；
E, the crushing in the mixture feeding pulverizer of taking-up resin adhesive and dry mash from kneader, on demand sieving are formed
Carbon compound.
When stirring dry mash in the b step, forward and backward adjustment one is carried out every 10 minutes impellers of control kneader
It is secondary.Graphite powder and dry powder bonding agent can be so set to mix more uniform.
When resin adhesive being poured into kneader in the step c, resin adhesive need to be made to be impregnated with kneader completely
Dry mash, if resin adhesive is very few, alcohol is supplemented, until the dry mash being impregnated with completely in kneader so that resin
The mixture of bonding agent and dry mash is as mud.Can so be easy to subsequently be well mixed with sic powder.
When kneader being progressively warming up into 75~85 DEG C of evaporation alcohol in the step c, kneader is kept to be stirred for 15
~20 minutes, kneader is then turned off, be homogenized material.
Graphite powder is made up of a diameter of 10 microns~30 microns of artificial spherical graphite in a steps, this
Sample is easy to system material, is mixed and more uniform by particle after granulation, easily uniformly mixes with sic powder.
It is described to mix carbon compound with pressureless sintering carborundum powder, it is made blank after mixing, then by blank attrition process
For the specific steps of finished product include：
1）, obtained carbon compound in the step e mixed with pressureless sintering carborundum powder, mixing can be mixed using ball milling method
Close or sieving mode the hybrid mode such as mixes and mixed；
2）, the mixture of obtained carbon compound and pressureless sintering carborundum powder in the step e suppressed by dry-pressing mode
Shaping, then without pressure vacuum-sintering to 2100~2200 DEG C, natural cooling obtains blank；
3）, by blank attrition process be mechanical seal slide unit.
1st）By when obtained carbon compound mixes with pressureless sintering carborundum powder in the step e in step, carbon mixes
Material accounts for the percentage by weight ＞ 0.1% and≤10% of whole carbon compound and the mixture of pressureless sintering carborundum powder.In existing skill
Although proposed in art it is a kind of by using plus carbon make up the technology of carbofrax material problem points, however, due to the dispersion of carbon
Property is poor, and proportion is inconsistent, it is difficult to be directly well mixed with sic powder, accordingly, it is difficult to have concurrently good sliding capability with it is close
Sealing property.The present embodiment by first preparing above-mentioned carbon compound, then by carbon compound with pressureless sintering carborundum powder according to above-mentioned
Total amount percentage carries out configuration processing, and the finished product being made can be such that carbon is distributed approximately evenly between the carborundum, so that
Finished product has good sliding capability and sealing property.
As shown in figure 1, in the inside of mechanically-sealing apparatus, the mechanical seal slide unit 1 in the present embodiment can be straight
Connect as rotary part（Eastern ring）And stationary parts（Stationary ring）The two, or one of them is also used as, or can also configure
Boundary portion between the rotary part rotated together with rotary shaft and non-rotary stationary parts.General, in the present embodiment
Mechanical seal slide unit is fixed on rotary part to use in pairs（Rotating ring）The mechanical seal slide unit of side be fixed on it is quiet
Stop part（Stationary ring）The mechanical seal slide unit of side.The one side of mechanical seal slide unit is slip working face 111, Gu
It is scheduled on rotary part（Rotating ring）The slip working face 111 of the mechanical seal slide unit 1 of side be fixed on stationary parts（Stationary ring）
The relative slip bonded to each other of slip working face 111 of the mechanical seal slide unit 1 of side, by the slip working face 111 for sliding
Fluid is sealed.
The slip working face of mechanical seal slide unit carries out micro- in two samples that be made for the present embodiment by applicant
Take pictures, as shown in Figures 2 and 3, it can be observed that carbon generally uniform distribution in working face is slided, with some tens of pm~hundreds of
The diameter of microns, black portions are carbon in figure, and white portion is carborundum.
In addition, applicant uses leak test machine, pair 1~sample of sample 5 for adding carbon compound ratio different is leaked
Experiment, the condition of leak test uses water as sealing fluid, slides the pressure 0.25Mpa of working face, and temperature is room temperature, as
Component materials'use same material is tested, test data such as following table：
| Sample 1 | Sample 2 | Sample 3 | Sample 4 | Sample 5 | |
| Plus carbon compound ratio（%） | 0.1 | 0.2 | 5 | 10 | 11 |
| Mating surface material | C-SiC | C-SiC | C-SiC | C-SiC | C-SiC |
| Test speed（r/min） | 4000 | 4000 | 4000 | 4000 | 4000 |
| Leakage | × | √ | √ | √ | × |
| Dry friction | × | √ | √ | √ | × |
In leak test project in table, the leakage rate less than 3ml/hr is judged to " √ ", will be greater than being equal to 3ml/hr's
Leakage rate is judged to "×"；Dry friction is that the rubber near mechanical seal slide unit is arranged in leak test machine by detection
Part is judged to "×", otherwise be then judged to come what is judged if rubber components aging phenomenon occurs because temperature is raised
“√”。
As can be seen from the above table, when in sample carbon compound account for the mixing of whole carbon compound and pressureless sintering carborundum powder
The percentage by weight ＞ 0.1% of thing and when≤10%, the leaking performance and dry friction performance of sample entirely reach preferable effect.
Embodiment 2：Compared with Example 1, difference is：The preparation process of carbon compound is：
A, by weight, takes 20 parts of graphite powder, 2.5 parts of dry powder bonding agent, by above graphite powder and dry powder bonding agent constitute it is dry
Powder is put into mixing tank, after sealing on ball mill ball milling 80 minutes, poured into kneader after being sufficiently mixed；
B, startup kneader start stirring 80 minutes and the temperature of kneader are progressively risen into 112 DEG C, and moisture content in dry mash is steamed
After hair shaft is net, then progressively it is cooled to 82 DEG C；
C, by weight, takes resin（It is preferred that using phenolic resin）9 parts, above material is added and held by 4 parts of alcohol, 0.5 part of oleic acid
Stir to form resin adhesive in device, then pour into kneader resin adhesive, now by kneader temperature control
At 53 DEG C, after the resin adhesive and dry mash in kneader are fully mediated into stirring 2.5 hours, then kneader is progressively heated up
To 80 DEG C of evaporation alcohol, kneader is then shut off；
D, the resin adhesive and the mixture of dry mash in kneader are placed in kneader and dried in the shade for old more than 12 hours；
E, the crushing in the mixture feeding pulverizer of taking-up resin adhesive and dry mash from kneader, on demand sieving are formed
Carbon compound.
The described 3rd）In the slip working face of the mechanical seal slide unit that step is made, carbon area accounts for whole slip work
The area ratio for making face is ＞ 1% and ＜ 10%.It is set to more than setting by by the area ratio of carbon, it can be ensured that support contact force
Carborundum amount such that it is able to support load, be set to less than setting by by the area ratio of carbon, it can be ensured that friction pair
Sealing, wearability, so as to improve lubricity.
Carbon area is first entered line slip working face by applicant than different 6~samples of sample 10 using electronic microscope photos microscope
Microphotograph image analysis, and slide the carbon area ratio in working face using image processing software computation and measurement, then will
6~sample of sample 10 carries out leak test, and the condition of leak test uses water as sealing fluid, slides the pressure of working face
0.25Mpa, temperature is room temperature, is tested as component materials'use same material, test data such as following table：
| Sample 6 | Sample 7 | Sample 8 | Sample 9 | Sample 10 | |
| Carbon area ratio（%） | 1 | 3 | 6 | 9 | 10 |
| Mating surface material | C-SiC | C-SiC | C-SiC | C-SiC | C-SiC |
| Test speed（r/min） | 4000 | 4000 | 4000 | 4000 | 4000 |
| Leakage | √ | √ | √ | √ | × |
| Dry friction | × | √ | √ | √ | √ |
In leak test project in table, the leakage rate less than 3ml/hr is judged to " √ ", will be greater than being equal to 3ml/hr's
Leakage rate is judged to "×"；Dry friction is that the rubber near mechanical seal slide unit is arranged in leak test machine by detection
Part is judged to "×", otherwise be then judged to come what is judged if rubber components aging phenomenon occurs because temperature is raised
“√”。
As can be seen from the above table data, more than 1% is set to by by the area ratio of carbon, can effectively lifts slip work
Make self-lubricating effect when face rubs, in addition, be set to less than 10% by by the area ratio of carbon, being capable of effectively anti-sliding stop work
Make face leakage.Therefore, in the present embodiment, it is preferred that it is ＞ 1% and ＜ that carbon area accounts for the whole area ratio for sliding working face
10%.Carbon area accounts for the whole area ratio for sliding working face can be by the 1st）Carbon compound and pressureless sintering carbon are adjusted in step
Percentage by weight between SiClx powder is adjusted.
Embodiment 3：Compared with Example 1, difference is：The preparation process of carbon compound is：
A, by weight, takes 30 parts of graphite powder, 3.5 parts of dry powder bonding agent, by above graphite powder and dry powder bonding agent constitute it is dry
Powder is put into mixing tank, after sealing on ball mill ball milling 90 minutes, poured into kneader after being sufficiently mixed；
B, startup kneader start stirring 90 minutes and the temperature of kneader are progressively risen into 115 DEG C, and moisture content in dry mash is steamed
After hair shaft is net, then progressively it is cooled to 85 DEG C；
C, by weight, takes resin（It is preferred that using phenolic resin）11 parts, 5 parts of alcohol, 0.8 part of oleic acid adds above material
Stir to form resin adhesive in container, then pour into kneader resin adhesive, now by kneader temperature control
System after the resin adhesive and dry mash in kneader are fully mediated into stirring 2.5 hours, then kneader is progressively risen at 57 DEG C
Temperature is then shut off kneader to 83 DEG C of evaporation alcohol；
D, the resin adhesive and the mixture of dry mash in kneader are placed in kneader and dried in the shade for old more than 12 hours；
E, the crushing in the mixture feeding pulverizer of taking-up resin adhesive and dry mash from kneader, on demand sieving are formed
Carbon compound.
Embodiment 4：Compared with Example 1, difference is：The preparation process of carbon compound is：
A, by weight, takes 40 parts of graphite powder, 5 parts of dry powder bonding agent, the dry powder that above graphite powder and dry powder bonding agent are constituted
Material be put into mixing tank, after sealing on ball mill ball milling 100 minutes, poured into kneader after being sufficiently mixed；
B, startup kneader start stirring 100 minutes and the temperature of kneader are progressively risen into 120 DEG C, and moisture content in dry mash is steamed
After hair shaft is net, then progressively it is cooled to 90 DEG C；
C, by weight, takes resin（It is preferred that using 15 parts of phenolic resin, above material is added container by 6 parts of alcohol, 1 part of oleic acid
In stir to form resin adhesive, then resin adhesive is poured into kneader, now kneader temperature control is existed
60 DEG C, after the resin adhesive and dry mash in kneader are fully mediated into stirring 3 hours, then kneader is progressively warming up to 85
DEG C evaporation alcohol, be then shut off kneader；
D, the resin adhesive and the mixture of dry mash in kneader are placed in kneader and dried in the shade for old more than 12 hours；
E, dry in the shade after taken out from kneader and crush in the mixture feeding pulverizer of resin adhesive and dry mash, mistake on demand
Sieve forms carbon compound.
Described 3rd）The arithmetic average roughness Ra ＞ of the slip working face of the mechanical seal slide unit that step is made
More than 0.01 μm and ＜ 1 μm.
Applicant is carried out first with surface roughness instruments to the roughness that working face is slided in 11~sample of sample 15
Detection, then 11~sample of sample 15 is carried out into leak test, the condition of leak test uses water as sealing fluid, slides work
The pressure 0.25Mpa in face, temperature is room temperature, is tested as component materials'use same material, and test data is as follows
Table：
| Sample 11 | Sample 12 | Sample 13 | Sample 14 | Sample 15 | |
| Arithmetic average roughness（μm） | 0.01 | 0.04 | 0.3 | 0.9 | 1 |
| Mating surface material | C-SiC | C-SiC | C-SiC | C-SiC | C-SiC |
| Test speed（r/min） | 4000 | 4000 | 4000 | 4000 | 4000 |
| Leakage | √ | √ | √ | √ | × |
| Dry friction | × | √ | √ | √ | √ |
In leak test project in table, the leakage rate less than 3ml/hr is judged to " √ ", will be greater than being equal to 3ml/hr's
Leakage rate is judged to "×"；Dry friction is that the rubber near mechanical seal slide unit is arranged in leak test machine by detection
Part is judged to "×", otherwise be then judged to come what is judged if rubber components aging phenomenon occurs because temperature is raised
“√”。
As can be seen from the above table, more than 0.01 μm is set to by by the arithmetic average roughness Ra for sliding working face, can
The lubricity for sliding working face is effectively improved, in addition, by being set to arithmetic average roughness Ra less than 1 μm, to keep
Slide the lubricity of working face.Therefore, in the present embodiment, it is preferred that attrition process slides the arithmetic average roughness of working face
More than 0.01 μm and ＜ 1 μm of Ra ＞.
To sum up, the present invention recycles carbon compound to be mixed with sic raw material by first preparing a kind of carbon compound
Processing, thus also shortens while the performances such as elevating mechanism sealing slide unit slip and prepares carborundum based material
Process cycle, reduce production cost.By designing the preparation method of carbon compound, the dispersiveness of carbon can be improved so that carbon
It is distributed approximately evenly between carborundum, so that finished product has the carbonization silicon features of hard, low abrasion while having good
Sliding capability and sealing property.By will be set to the percentage by weight between the carbon compound and sic raw material that are made
Meter, can further improve the dispersiveness of carbon, so as to further improve the sliding capability and sealing property of finished product.
Above example is used for illustrative purposes only, rather than limitation of the present invention, about the technology people of technical field
Member without departing from the spirit and scope of the present invention, can also make a variety of changes or convert, therefore all equivalent
Technical scheme should also belong to protection scope of the present invention, and protection scope of the present invention should be limited by each claim.
Claims (10)
1. a kind of preparation method of carborundum based material mechanical seal slide unit, it is characterised in that：First prepare carbon mixing
Material, then carbon compound is mixed with pressureless sintering carborundum powder, sintering is made blank after mixing, then blank attrition process is into
Product.
2. the preparation method of carborundum based material mechanical seal slide unit according to claim 1, its feature exists
In：The preparation process of carbon compound is：
A, by weight, takes 10~40 parts of graphite powder, 0.5~5 part of dry powder bonding agent, by above graphite powder and dry powder bonding agent group
Into dry mash be put into mixing tank, after sealing on ball mill ball milling 70~100 minutes, pour into kneader after being sufficiently mixed
In；
B, startup kneader start stirring 70~100 minutes and the temperature of kneader are progressively risen into 110~120 DEG C, by dry powder
After moisture evaporation is clean in material, then progressively it is cooled to 80~90 DEG C；
C, by weight, takes 7~15 parts of resin, 3~6 parts of alcohol, 0.1~1 part of oleic acid, will above material add container in stir
Resin adhesive is formed uniformly, then resin adhesive is poured into kneader, now by kneader temperature control 50~60
DEG C, after the resin adhesive and dry mash in kneader are fully mediated into stirring 2~3 hours, then kneader is progressively warming up to
75~85 DEG C of evaporation alcohol, are then shut off kneader；
D, the resin adhesive and the mixture of dry mash in kneader are placed on old in kneader drying in the shade；
E, dry in the shade after taken out from kneader and crush in the mixture feeding pulverizer of resin adhesive and dry mash, mistake on demand
Sieve forms carbon compound.
3. the preparation method of carborundum based material mechanical seal slide unit according to claim 2, its feature exists
In：When stirring dry mash in the b step, forward and backward adjustment is carried out once every 10 minutes impellers of control kneader.
4. the preparation method of carborundum based material mechanical seal slide unit according to claim 2, its feature exists
In：When resin adhesive being poured into kneader in the step c, the dry powder during resin adhesive need to be made to be impregnated with kneader completely
Material, if resin adhesive is very few, supplements alcohol, until the dry mash being impregnated with completely in kneader.
5. the preparation method of carborundum based material mechanical seal slide unit according to claim 2, its feature exists
In：When kneader being progressively warming up into 75~85 DEG C of evaporation alcohol in the step c, kneader is kept to be stirred for 15~20 points
Clock, then turns off kneader.
6. the preparation method of carborundum based material mechanical seal slide unit according to claim 2, its feature exists
In：Graphite powder is made up of a diameter of 10 microns~30 microns of artificial spherical graphite in a steps.
7. the preparation method of carborundum based material mechanical seal slide unit according to claim 2, its feature exists
In：It is described to mix carbon compound with pressureless sintering carborundum powder, blank is made after mixing, then be finished product by blank attrition process
Specific steps include：
1）, obtained carbon compound in the step e mixed with pressureless sintering carborundum powder；
2）, the mixture of obtained carbon compound and pressureless sintering carborundum powder in the step e suppressed by dry-pressing mode
Shaping, then without pressure vacuum-sintering to 2100~2200 DEG C, natural cooling obtains blank；
3）, by blank attrition process be mechanical seal slide unit.
8. the preparation method of carborundum based material mechanical seal slide unit according to claim 7, its feature exists
In：1st）By when obtained carbon compound mixes with pressureless sintering carborundum powder in the step e in step, carbon compound accounts for whole
The percentage by weight ＞ 0.1% and≤10% of the mixture of individual carbon compound and pressureless sintering carborundum powder.
9. the preparation method of carborundum based material mechanical seal slide unit according to claim 8, its feature exists
In：The described 3rd）In the slip working face of the mechanical seal slide unit that step is made, carbon area accounts for whole slip working face
Area ratio be ＞ 1% and ＜ 10%.
10. the preparation method of carborundum based material mechanical seal slide unit according to claim 8, its feature exists
In：Described 3rd）0.01 μm of the arithmetic average roughness Ra ＞ of the slip working face of the mechanical seal slide unit that step is made
Above and 1 μm of ＜.
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| CN113735587A (en) * | 2021-07-06 | 2021-12-03 | 浙江天鹰机械密封件股份有限公司 | Preparation method of magnetic mechanical sealing element friction pair |
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