CN106402391A - Silicon carbide sintering material for mechanical sealing, and mechanical sealing device using same - Google Patents
Silicon carbide sintering material for mechanical sealing, and mechanical sealing device using same Download PDFInfo
- Publication number
- CN106402391A CN106402391A CN201610975199.9A CN201610975199A CN106402391A CN 106402391 A CN106402391 A CN 106402391A CN 201610975199 A CN201610975199 A CN 201610975199A CN 106402391 A CN106402391 A CN 106402391A
- Authority
- CN
- China
- Prior art keywords
- carborundum
- silicon carbide
- mechanical sealing
- weight portion
- sintered material
- 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.)
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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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/18—Sealings between relatively-moving surfaces with stuffing-boxes for elastic or plastic packings
- F16J15/20—Packing materials therefor
-
- 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
-
- 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
-
- 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
- C04B2235/38—Non-oxide ceramic constituents or additives
- C04B2235/3817—Carbides
- C04B2235/3821—Boron carbides
-
- 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
- C04B2235/424—Carbon black
Abstract
The invention discloses a silicon carbide sintering material for mechanical sealing, and a mechanical sealing device using the silicon carbide sintering material for mechanical sealing. In the making process of sintering compact silicon carbide, a plurality of independent air pores for oil storage are formed in each sintered silicon carbide body, the pore diameter of each independent air pore ranges from 10 micrometers to 40 micrometers, and the porosity of the independent air pores ranges from 3% to 13%. According to the silicon carbide sintering material for mechanical sealing, and the mechanical sealing device using the silicon carbide sintering material for mechanical sealing, the mechanical sealing device can use the combination of silicon carbide and carbon product materials or the combination of silicon carbide and silicon carbide under a high PV value, the phenomena of abnormal sounds, bonding, engagement and blisters will not occur, and effective usage is achieved. The silicon carbide sintering material for mechanical sealing is excellent in corrosion resistance and abrasion resistance, and maintains high hardness to a certain extent.
Description
Technical field
The present invention relates to carborundum sintered material technical field, it is applied to pump, the encapsulation of cryoprobe isometry particularly to one kind
The mechanically-sealing apparatus put, in addition elaborate using the carborundum sintered material having particular air holes, in further detail to improve slip
The mechanically-sealing apparatus of characteristic.
Background technology
Mechanical seal refer to by least one pair of perpendicular to rotation axiss end face in Fluid pressure and compensation mechanism elastic force（Or
Magnetic force）In the presence of and auxiliary seal the lower dress preventing fluid leakage keeping laminating and constituting with respect to slip of cooperation
Put.Sliding material as mechanically-sealing apparatus is mainly carbon product, superhard alloy, carborundum sintered body and alumina sintered body
Friction pair Deng, mechanical seal includes rotating ring and stationary ring, and such as rotating ring selects carbon product（Graphitic carbon product or impregnating resin stone
Ink）, stationary ring is applied in combination from aluminium oxide, but what the combination of carbon and carbofrax material, carborundum and carborundum were applied in combination
Situation is also increasing.This is because, if carborundum, slip face pressure is long-pending with rotation circular velocity, that is, PV value is permissible
Reach critical point so that the high performance of machinery, miniaturization are possibly realized.As muddy liquid, when particle abrasion become
When problem, how to be applied in combination using carborundum and carborundum.Carborundum is the material of high rigidity, highly corrosion resistant, as carbon system
Product, are hexagonal, and itself does not have lubricity, and its crystalline structure is substantially free of vitreous crystal grain, thus have very good
Flatness, his main feature of coefficient of friction hour during slip.
But, due to minute surface friction reason, carborundum and carborundum combination easily produce noise on startup, are also easy to send out
The adhesion problems of raw running-on, although and have the carbon product of self-lubricity and carborundum combination can reduce noise and adhesion problems,
But blister phenomenon also can occur sometimes（CARBON-BLISTER）Problem.This phenomenon is exactly the slip from carbon product material
Face starts speckle, initially forms small crack, and gradually becomes the phenomenon as being corroded by worm, this problem is just leading to
Liquid leakage aspect, will become the significant problem in sealing device.
The problems referred to above not only occur on carbon product and the situation of carborundum combination, are only because rubbing when starting
Heat, often depresses the situation of the combination of the carbon product material using and carborundum, especially is seeking to solve this in height sliding surface
The method of problem.That is, because the frictional heat that produces when starting, the surface of carbon product expands, contraction repeatedly, because
Thermal stress and there is fatigue damage etc..Thermally decomposing containing resin pickup, due to residual in the pore of carbon product material in carbon product material
The frictional dissipation of the oil staying and lead to a lot of phenomenon such as blister to be required for seeking solution.
Countermeasure with regard to this point is to improve the intensity of carbon product material, the precision of improvement mechanically-sealing apparatus, surface
Equalization, using double containment, using low-density brush, implements fluid cooling（STEARM QUENCH）, improve sliding surface temperature, low
Viscosity etc. method is all considered, but these countermeasures can not be fully solved its problem.In addition, not using carbon product material
Material, also has the combination of materials such as using carborundum hardness the same with carborundum, in this case, because high rigidity, contact
Run-in few, compare with using carbon product material, mechanical precision, parts precision and installation accuracy then need tighter
The requirement of lattice.
No matter how, reduce the essence that frictional heat when starting is solve problem, therefore using kish pasc reaction
The method of sintered silicon carbon, it is considered to put into various solid lubricants in the pore of Porous carborundum, is allowed to be impregnated with.So
And although the problem of the occlusion of metallic silicon impregnation silicon carbide reaction-sintered, generation allophone is fewer than the sintered silicon carbon of normal pressure, but
Corrosivity aspect has inferior position it is impossible to extensive apply；In addition manufacture Porous carborundum sintered material so as to be impregnated with freon afterwards
The method of the solids such as oil, molybdenum bisuphide, blacklead, boron carbide element or fluid lubricant it is necessary to pump vacuum, will be implemented by impregnation
For several times, so also resulting in cost increases.
Content of the invention
The present invention is directed to the deficiencies in the prior art and provides a kind of mechanical seal carborundum sintered material, has excellent resistance to
Corrosivity, abrasion performance, keep higher hardness under the conditions of, also solve carborundum sintered body adhesion problems, start occlusion problem,
Allophone produces and blister phenomenon.
For achieving the above object, the present invention provides technical scheme below.
A kind of mechanical seal carborundum sintered material, in fine and closely woven matter carborundum sintering manufacture process, makes carborundum burn
Knot body generates some independent pore for oil storage, and the pore diameter range of described independent pore is 10～40UM, described independent pore
Porosity scope be 3-13%.In fine and closely woven matter carborundum sintered body manufacture process, generate the independent pore as oil storage, solution
Occlusion problem when certainly sliding and allophone problem, the required pore of blister problem in order to there is not carbon product material is special
Levy, its main points is the pore diameter range of independent pore is 10～40UM, and porosity scope is 3-13%.Hereinafter give and there is this
The preparation method of the carborundum sintered body of feature, and this sintered silicon carbon is used as the rotating ring of mechanically-sealing apparatus（Rotary ring）
Or stationary ring（Retainer ring）Etc. concrete mode.
The above-mentioned mechanical seal preparation method of carborundum sintered material, chooses the A type carborundum of particle mean size 0.45uM
Powder 100 weight portion, boron carbide powder 0.8 weight portion, hydrocarbon black powder 2.5 weight portion, polyvinyl alcohol 2.5 weight portion, average grain
Polystyrene beading 7 weight portion of degree 20uM and water 11 weight portion, mix ten hours in ball mill, then use spray dryer
Be allowed to granulate, then with the pressure of 1.5T/CM2 by above-mentioned granule press molding in the die cavity of moulding press, finally 2050
DEG C argon environment in sinter finished product.Need exist for illustrate be：The raw material of carborundum sintered body whether A model or B
Model may be suitable for the present invention.In addition the fine and closely woven matter carborundum sintered body being previously mentioned refers to solid density percent
More than 95 sintered body.
A kind of mechanically-sealing apparatus, the rotating ring including the cooperation of mutual rotary sealing and stationary ring, described rotating ring and described stationary ring
Made with carborundum sintered material using above-mentioned mechanical seal.
A kind of mechanically-sealing apparatus, the rotating ring including the cooperation of mutual rotary sealing and stationary ring, described rotating ring uses above-mentioned
Mechanical seal is made with carborundum sintered material, and described stationary ring uses carbon product material, fine and closely woven matter carborundum sintered material, hard
Alloy material, cast iron or alumina sintered body are made.
A kind of mechanically-sealing apparatus, the rotating ring including the cooperation of mutual rotary sealing and stationary ring, described stationary ring uses above-mentioned
Mechanical seal is made with carborundum sintered material, and described rotating ring uses carbon product material, fine and closely woven matter carborundum sintered material, hard
Alloy material, cast iron or alumina sintered body are made.
The elaboration present invention further detailed below, with regard to independent pore, as oil storage that is to say, that the liquid being impregnated with
Wait because frictional heat is it is easy to ooze out oil film on startup, liquid can not flow out at short notice, just overstocks, continuation
Have an effect, because the friction of other side's material is not that is to say, that occur the hole diameter of the scope of blister phenomenon to be necessary,
It can be found that average pore size 10-40UM is suitable.Average air aperture less than 10UM, the oil stain that is impregnated with pore during startup
Surface is not appeared in, in addition more than 40UM, sealing can be leaked, if other side's material is carbon product, also in short time
Its friction of the promotion of meeting extreme.
Wherein, the mensure of air vent aperture is to obtain the value in average air aperture according to the aobvious observation of Walkthrough electricity of broken-out section.
Next, with regard to the porosity, admitted to a great extent long-pending oil effect, as not becoming continuous gas
The existence range of the independent pore in hole is necessary, and true porosity is to be suitable in the range of 3-13%, the long-pending oil less than 3%
The effect that can't see long-pending oil, while being greatly reduced more than 13% intensity, the reason also become oil leak, become continuous pore
Probability becomes strong.Complete opening gas rate is the sum of the standard-sized sheet pore and fully closed pore obtained according to the proportion of carborundum.
Carborundum sintering the most suitable air vent aperture of situation and the scope of the porosity and carborundum sintered body different.
In addition, with regard to the shape of pore, the carborundum sintered body of mother metal is typical hard material, in order to avoid stress concentration, need
Round shape, the referring to of round shape here, if edge not stress concentration at one, be to need soft and smooth curve
The shape of the pore of rate.
The method importing with regard to pore in carborundum sintered body, difference substantially is to add in sintered body raw material coordination compound
Spherical organic thing, in sintering process, according to decomposition, distillation makes the method that pore generates；With each material according to change sintering
Hinder fine and closely wovenization, make the method that pore remains.The method of the latter, has being mixed into of raw materials for sintering of such as granule, sintering aid
Decrement, the increase and decrease of programming rate, highest keeping temperature low, the method such as minimizing of highest keeping temperature, according to these methods
The shape of the pore created, typically round shape fewer, so not claiming is can become continuous pore suitable
Method.
A kind of above method, can be relatively easy to and obtain round shape, Organic substance in this case, if the initial stage
Shape have round if, be reasonable.If it is considered that the ball mill mixing of the raw material coordination compound according to hydrophily body, according to spray
The granulating that mist is dried, if the operation of cold working hydraulic pressure or metal type squeezer, adds Organic substance and does not dissolve in water, need
Do not soften the thermostability of liquidity when being spray-dried, synthesis or natural macromolecular compound are suitable, such as root
The polystyrene beading overlapping according to such as emulsifying, spherical starch grain, pulpiness spheroid is very suitable.
Compared with prior art beneficial effects of the present invention are：According to the present invention it is possible to using carbon under higher PV value
The mechanically sealed device of the combination of the combination of SiClx and carbon product material or carborundum and carborundum, will not occur allophone, glue
Close, be engaged and blister problem, can effectively use.This invention has outstanding corrosion resistance, abrasion performance, maintains to a certain extent
Higher hardness.
Specific embodiment
Illustrate the example being embodied as of the explanation present invention in detail below.
Embodiment 1：Choose A type silicon carbide powder 100 weight portion, boron carbide powder 0.8 weight of particle mean size 0.45uM
Part, hydrocarbon black powder 2.5 weight portion, polyvinyl alcohol 2.5 weight portion, polystyrene beading 7 weight portion of particle mean size 20uM and water
11 weight portions, produce the mud of 40% concentration, mix ten hours, then be allowed to granulate with spray dryer in ball mill, then
With the pressure of 1.5T/CM2 by above-mentioned granule press molding in the die cavity of moulding press, finally burn in 2050 DEG C of argon environment
Knot finished product.
This mechanical seal carborundum sintered material, in fine and closely woven matter carborundum sintering manufacture process, makes carborundum sinter
Body generates some independent pore for oil storage, and the pore diameter range of described independent pore is 10～40UM, described independent pore
Porosity scope is 3-13%.The proportion of volume is by water displacement method, and true porosity is, according to the solid density of carborundum
3.21G/CM3 obtains to calculate.Dimensions external diameter 30MM, internal diameter 24MM, thickness 8MM rub and grind processing, simultaneously with polishing
Wheel retouching, Rmax=0.05um.
Comparative example 1：Do not add polystyrene beading, remaining is same as Example 1.
As the sliding material of mechanically sealed device, it is impregnated with the carbonization of carbon product material and embodiment 1 using furane resins
The situation of silicon sintered body, and it is impregnated with the situation of the carborundum sintered body of carbon product material and comparative example 1 using furane resins, two
Blister whether can be occurred to be tested in the case of kind.
Test condition be：C heavy oil, in the case of pressure 10KG/CM2, in the testing machine of the pump type of circulation, uses axle
Footpath 40MM, slip winding number N=3000R.P.M operate 15 minutes, stop the intermittent working of 5 minutes testing.
Blister is high viscosity fluid, and operating stops often, if PV value height, relatively blister occurs more at short notice
Generally, using the sintered body in embodiment 1,100 hours, even that is, the discontinuous blister of 300 times also will not occur.
On the other hand, sintered body used in comparative example 1, after 5h, that is, after the intermittent working of 15 times, meeting
Find leakage, go to decompose, the sliding material part of the exerciser of disintegrating, find that the sliding surface of carbon product material has 5 generations
Blister phenomenon.
It can thus be appreciated that the present invention has the effect of brilliance in terms of preventing blister phenomenon.
The above is only the better embodiment of the present invention, therefore the construction described in all scopes according to present patent application,
Equivalence changes or modification that feature and principle are done, are all included in the range of present patent application.
Claims (5)
1. a kind of mechanical seal carborundum sintered material, in fine and closely woven matter carborundum sintering manufacture process, makes carborundum sinter
Body generate some independent pore for oil storage it is characterised in that：The pore diameter range of described independent pore is 10～40UM, described
The porosity scope of independent pore is 3-13%.
2. a kind of mechanical seal as claimed in claim 1 with the preparation method of carborundum sintered material it is characterised in that：Choose
A type silicon carbide powder 100 weight portion of particle mean size 0.45uM, boron carbide powder 0.8 weight portion, hydrocarbon black powder 2.5 weight portion,
Polyvinyl alcohol 2.5 weight portion, polystyrene beading 7 weight portion of particle mean size 20uM and water 11 weight portion, mixed in ball mill
Put the palms together before one hour, then be allowed to granulate with spray dryer, then with the pressure of 1.5T/CM2 by above-mentioned granule in moulding press
Press molding in die cavity, finally sinters finished product in 2050 DEG C of argon environment.
3. a kind of mechanically-sealing apparatus, including mutual rotary sealing cooperation rotating ring and stationary ring it is characterised in that：Described rotating ring and
Described stationary ring is made with carborundum sintered material using mechanical seal as claimed in claim 1.
4. a kind of mechanically-sealing apparatus, including mutual rotary sealing cooperation rotating ring and stationary ring it is characterised in that：Described rotating ring makes
Made with mechanical seal as claimed in claim 1 carborundum sintered material, described stationary ring uses carbon product material, fine and closely woven matter
Carborundum sintered material, Hardmetal materials, cast iron or alumina sintered body are made.
5. a kind of mechanically-sealing apparatus, including mutual rotary sealing cooperation rotating ring and stationary ring it is characterised in that：Described stationary ring makes
Made with mechanical seal as claimed in claim 1 carborundum sintered material, described rotating ring uses carbon product material, fine and closely woven matter
Carborundum sintered material, Hardmetal materials, cast iron or alumina sintered body are made.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610975199.9A CN106402391A (en) | 2016-11-07 | 2016-11-07 | Silicon carbide sintering material for mechanical sealing, and mechanical sealing device using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610975199.9A CN106402391A (en) | 2016-11-07 | 2016-11-07 | Silicon carbide sintering material for mechanical sealing, and mechanical sealing device using same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106402391A true CN106402391A (en) | 2017-02-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610975199.9A Pending CN106402391A (en) | 2016-11-07 | 2016-11-07 | Silicon carbide sintering material for mechanical sealing, and mechanical sealing device using same |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101054310A (en) * | 2007-05-04 | 2007-10-17 | 邬国平 | Carbon fiber enhanced porous normal pressure sintering silicon carbide and preparation method thereof |
| CN101166701A (en) * | 2005-04-27 | 2008-04-23 | 京瓷株式会社 | Porous ceramic for use in slide member and its manufacturing method and mechanical seal ring using it |
| CN101365660A (en) * | 2006-02-24 | 2009-02-11 | 日立化成工业株式会社 | Sintered ceramic, slide part therefrom, and process for producing sintered ceramic |
| CN102345677A (en) * | 2010-08-02 | 2012-02-08 | 保来得株式会社 | Method for producing fluid dynamic pressure bearing |
| CN102770394A (en) * | 2010-02-24 | 2012-11-07 | 京瓷株式会社 | Silicon carbide sintered body and sliding component using the same and protective body |
-
2016
- 2016-11-07 CN CN201610975199.9A patent/CN106402391A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101166701A (en) * | 2005-04-27 | 2008-04-23 | 京瓷株式会社 | Porous ceramic for use in slide member and its manufacturing method and mechanical seal ring using it |
| CN101365660A (en) * | 2006-02-24 | 2009-02-11 | 日立化成工业株式会社 | Sintered ceramic, slide part therefrom, and process for producing sintered ceramic |
| CN101054310A (en) * | 2007-05-04 | 2007-10-17 | 邬国平 | Carbon fiber enhanced porous normal pressure sintering silicon carbide and preparation method thereof |
| CN102770394A (en) * | 2010-02-24 | 2012-11-07 | 京瓷株式会社 | Silicon carbide sintered body and sliding component using the same and protective body |
| CN102345677A (en) * | 2010-08-02 | 2012-02-08 | 保来得株式会社 | Method for producing fluid dynamic pressure bearing |
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Application publication date: 20170215 |