CN104989828A - Mechanical seam with improved structure - Google Patents
Mechanical seam with improved structure Download PDFInfo
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- CN104989828A CN104989828A CN201510337332.3A CN201510337332A CN104989828A CN 104989828 A CN104989828 A CN 104989828A CN 201510337332 A CN201510337332 A CN 201510337332A CN 104989828 A CN104989828 A CN 104989828A
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- ring
- seal
- groove
- mechanical seal
- seal disc
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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
- F16J15/34—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
- F16J15/3436—Pressing means
- F16J15/3452—Pressing means the pressing force resulting from the action of a spring
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L75/00—Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
- C08L75/04—Polyurethanes
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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
- F16J15/40—Sealings between relatively-moving surfaces by means of fluid
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Sealing Devices (AREA)
Abstract
The invention belongs to the technical field of sealing systems, and relates to mechanical seal with an improved structure. The mechanical seal with the improved structure comprises a rotary shaft, a sealing plate and a transmission sleeve which is arranged between the rotary shaft and the sealing plate, wherein a dynamic ring and a static ring are arranged between the transmission sleeve and the sealing plate; the rear end of the dynamic ring is adhered to the front end of the static ring, and the dynamic ring can rotate relative to the static ring; a ring-shaped accommodating slot is formed between the static ring and the sealing plate; a joint of the dynamic ring and the static ring is positioned in the ring-shaped accommodating slot; a liquid storage cavity which is communicated with the ring-shaped accommodating cavity and used for storing a cooling liquid is formed in the sealing plate; the sealing plate is made from a composite material; and the composite material consists of the following components in parts by weight: 100 parts of polyurethane, 15-25 parts of epoxy resin, 0.1-3 parts of a hydroxylated multi-wall carbon nano tube, 0.5-3 parts of a filler, and 2-15 parts of auxiliaries. According to the mechanical seal, the structure of the mechanical seal is reasonably arranged, and the sealing plate is made from the composite material, so that the mechanical seal with the improved structure is good in sealing effect, good in cooling effect, and prolonged in service life.
Description
Technical field
The invention belongs to sealing system technical field, relate to a kind of structure improved mechanical seal.
Background technique
Current normally used mechanical seal mainly comprises the rotating ring be arranged on outside running shaft and seals with its relative seal face with stationary ring, wherein rotating ring is connected and energy synchronous rotary with running shaft through locking, the static sealing compensation structure comprising spring and respective springs seat is set at stationary ring tail end, stationary ring is axially to run through end cap exterior edge face, its seal face is positioned at end cap, stretch in outside tail end outside end cap, make Elastic Contact with the spring of the sealing compensation structure be arranged in outside end cap.
As Chinese patent (CN202914750U) a kind of Sealing in prior art, comprise stationary ring, rotating ring, rotating seat, retainer and be arranged on the lining ring of rotating seat lower end, described stationary ring upper end is provided with static sealing ring, rotating ring is provided with on the right side of described stationary ring, rotating seat and lining ring is provided with on the right side of described rotating ring, retainer seal ring is provided with in the groove of described retainer, described retainer fixed by fastening piece, bellows is provided with between described rotating seat and retainer, although the program can realize the seal action of Sealing, but be not provided with cooling mechanism in this scenario, relatively rotate at stationary ring and rotating ring and can produce large calorimetric thus the surface temperature that improve rotating ring and stationary ring, higher temperature can cause damage to rotating ring and stationary ring, reduce the working life of rotating ring and stationary ring.And seal ring common in prior art, seal disc are all made with ordinary resin, sealing effect is general, and easily weares and teares, and working life is short.
Summary of the invention
The object of the invention is to there are the problems referred to above for existing technology, propose the structure improved mechanical seal of a kind of good sealing effect, good cooling results.
Object of the present invention realizes by following technical proposal: a kind of structure improved mechanical seal, comprise rotating shaft, seal disc and the drive sleeve be arranged between rotating shaft and seal disc, it is characterized in that, rotating ring and stationary ring is provided with between drive sleeve and seal disc, the rear end of described rotating ring is affixed on the front end of stationary ring and rotating ring can rotate relative to stationary ring, annular receiving groove is formed between stationary ring and seal disc, the joint of described rotating ring and stationary ring is positioned at annular receiving groove, seal disc offers and to communicate with annular receiving groove and liquid storage cylinder for storing cooling liquid, wherein, described seal disc is made up of composite material.
In the structure improved mechanical seal of above-mentioned one, drive sleeve is equipped with locating stud, rotating ring offers the fixed groove corresponding with locating stud, described locating stud is positioned at fixed groove.
In the structure improved mechanical seal of above-mentioned one, between drive sleeve and seal disc, be formed with receiving cavity, the stop pin that two ends are connected with seal disc with stationary ring is respectively installed in receiving cavity.
In the structure improved mechanical seal of above-mentioned one, drive sleeve is provided with the fastening ring with through hole, is connected with socket head screw at through hole internal thread, and described socket head screw can stretch out through hole and be resisted against in rotating shaft.
In the structure improved mechanical seal of above-mentioned one, also positioning block is provided with between socket head screw and fastening ring, described positioning block has extended to form joint near seal disc side, joint is fixed with positioning part, seal disc is provided with the circular groove corresponding with positioning part, and described position point is in circular groove.
In the structure improved mechanical seal of above-mentioned one, between drive sleeve and rotating ring, offer the first groove, in the first groove, be provided with dynamic seal ring.
In the structure improved mechanical seal of above-mentioned one, between stationary ring and seal disc, offer the second groove, in the second groove, be provided with static sealing ring.
In the structure improved mechanical seal of above-mentioned one, between drive sleeve and rotating shaft, offer the 3rd groove, in the 3rd groove, be provided with transmission seal circle.
In the structure improved mechanical seal of above-mentioned one, described seal disc composite material used is made up of following composition and parts by weight thereof: polyurethane: 100 parts, epoxy resin: 15-25 part, hydroxylating multi-wall carbon nanotube: 0.1-3 part, filler: 0.5-3 part, auxiliary agent: 2-15 part.
The present invention adopts compatibility rational, and seal disc made by the composite material of excellent performance, improves sealing, wear resistance, the corrosion resistance of seal disc further, and then improves the working life of this structure improved mechanical seal.Wherein, polyurethane is alternately made up of hard section and soft section, has good physical and mechanical property, has the premium properties such as wear-resisting, tear-resistant, corrosion-resistant.Seal disc of the present invention adopts the rational composite material of compatibility to make, the epoxy resin wherein adding 15-25 part in composite material can to polyurethane aqueous dispersion body modification, branch point is introduced polyurethane backbone, makes it hardness, adhesion, chemical resistance etc. that forming section reticular structure increases substantially composite material.Be added with multi-wall carbon nanotube in the composite material of seal disc of the present invention simultaneously, multi-wall carbon nanotube and aqueous pu dispersions have good compatibility and synergistic enhancing effect, the doping vario-property of multi-wall carbon nanotube can improve the resistance to heat of polyurethane, and then improves the wear resistance of composite material.
Polyethyleneglycol, pentaerythritol are grafted to obtained hydroxylating multi-wall carbon nanotube on multi-wall carbon nanotube by azide method by described hydroxylating multi-wall carbon nanotube respectively.
Described filler is nano titanium oxide, and the particle diameter of described nano titanium oxide is 20nm-60nm.Nano titanium oxide has large specific surface area, and surface atom number, surface energy and surface tension sharply increase along with the decline of particle diameter.Small-size effect, skin effect, size effect and macro quanta tunnel effect etc., all cause the heat of nano titanium oxide, sensitivity characteristic and surface stability to be different from conventional particle.The nano titanium oxide adding 0.5-3 part in the composite effectively can not only improve the wear resistance of composite material, effectively can also improve the anti-corrosion capacity of composite material.But filler number is too much, little to the raising of the wear resistance of composite material, corrosion resistance and thermostability, and can cost of production be increased.
Described auxiliary agent comprises oiling agent: 0.2-3 part, compatibilizer: 0.5-5 part, antioxidant: 1-6 part, anti-static agent: 0.5-3 part.Described oiling agent, compatibilizer, antioxidant, anti-static agent to be in prior art conventional, commonly commercially availablely can to obtain.
As described in oiling agent be one or more in fitter acids and its ester class, fatty acid amide, organo-silicon compound.
Described compatibilizer is one or more in POE-g-MAH, phenolic resin, silane coupling agent, titante coupling agent.
Described antioxidant is one or more in Hinered phenols antioxidant, phosphite ester kind antioxidant, suffocated amine antioxidant.Antioxidant can suppress the oxygen in air to the oxygenolysis of material, improves the reservation that material of the present invention heats rear physical property in aerobic air.
Described anti-static agent is one or more of alkali metal salt of alkyl sulfonic acid, aminodithioformic acid.
Compared with prior art, the drive sleeve that the present invention includes rotating shaft, seal disc and be sheathed in rotating shaft, drive sleeve can with rotating shaft synchronous axial system, rotating ring and stationary ring is provided with between drive sleeve and seal disc, the rear end of rotating ring is affixed on stationary ring and rotating ring can rotate relative to stationary ring, seal disc offers the liquid storage cylinder communicated with stationary ring and rotating ring joint, cooling liquid can flow in annular receiving groove along liquid storage cylinder, and rotating ring and stationary ring joint are cooled, reduce the surface temperature of stationary ring and rotating ring, improve the working life of stationary ring and rotating ring.In addition, seal disc adopts the rational composite material of compatibility to make, and has increased substantially the wear resistance of seal disc, intensity, elastic recovery properties, and then has improve the working life of mechanical seal of the present invention.
Accompanying drawing explanation
Fig. 1 is sectional view of the present invention.
In figure, 100, rotating shaft; 200, seal disc; 210, liquid storage cylinder; 211, plug screw; 300, drive sleeve; 310, rotating ring; 311, driving pin; 320, stationary ring; 321, stop pin; 330, receiving cavity; 340, spring; 350, fastening ring; 351, through hole; 352, socket head screw; 353, positioning block; 354, joint; 355, positioning part; 356, circular groove; 400, the first groove; 410, dynamic seal ring; 500, the second groove; 510, static sealing ring; 600, the 3rd groove; 610, transmission seal circle.
Embodiment
Be below specific embodiments of the invention and by reference to the accompanying drawings, technological scheme of the present invention is further described, but the present invention be not limited to these embodiments.
As shown in Figure 1, this structure improved mechanical seal comprises rotating shaft 100, seal disc 200 and the drive sleeve 300 be arranged between rotating shaft 100 and seal disc 200, drive sleeve 300 is provided with the rotating ring 310 and stationary ring 320 that are connected with seal disc 200 with drive sleeve 300 respectively, the rear end of described rotating ring 310 is affixed on the front end of stationary ring 320 and rotating ring 310 can rotate relative to stationary ring 320, annular receiving groove is formed between stationary ring 320 and seal disc 200, the joint of described rotating ring 310 and stationary ring 320 is positioned at annular receiving groove, seal disc 200 offers and to communicate with annular receiving groove and liquid storage cylinder 210 for storing cooling liquid, described cooling liquid can flow in annular receiving groove, seal disc 200 is made up of composite material.
In order to avoid in the process in mechanical seal work, rotating ring 310 is bonded to each other between the two with stationary ring 320 and can produce large calorimetric in rotating ring 310 relative stationary ring 320 rotation process, rotating ring 310 and stationary ring 320 surface temperature are raised, long high temperature can aggravate the wearing and tearing of rotating ring 310 and stationary ring 320, cause shorten the generation of phenomenon the working life of rotating ring 310 and stationary ring 320, this machinery is sealed on seal disc 200 and offers liquid storage cylinder 210, and cooling liquid is provided with in liquid storage cylinder 210, cooling liquid can flow in annular receiving groove along liquid storage cylinder 210, and the joint between stationary ring 320 and rotating ring 310 is cooled, reduce the surface temperature of rotating ring 310 and stationary ring 320, the surface temperature of stationary ring 320 and rotating ring 310 is made to remain within the specific limits, thus improve the working life of stationary ring 320 and rotating ring 310, plug screw 211 is also provided with in liquid storage cylinder 210, the screw-in of plug screw 211 or back-out can realize conducting or the obstruction of liquid storage cylinder 210, when rotating shaft 100 rotating speed is lower, rotating ring 310 and stationary ring 320 do not need cooling liquid to cool, thus plug screw 211 screws in liquid storage cylinder 210, avoiding some impurity wafts into working life rotating ring 310 or stationary ring 320 surface tear being affected to rotating ring 310 and stationary ring 320, when rotating shaft 100 rotating speed is higher, plug screw 211 screws out, liquid storage cylinder 210 conducting thus cooling liquid can flow into stationary ring 320 and rotating ring 310 joint along liquid storage cylinder 210, reduce the surface temperature of rotating ring 310 and stationary ring 320, improve the working life of stationary ring 320 and rotating ring 310.
Drive sleeve 300 offers positioning hole, rotating ring 310 offers the fixed groove corresponding with positioning hole, above-mentioned driving pin 311 can pass positioning hole and be positioned at fixed groove, work process in driving pin 311 can with the sidewall contact of fixed groove, thus avoid the generation that shift phenomenon occurs rotating ring 310 in radial directions, improve the sealing effect of mechanical seal.
Stop pin 321 is provided with in receiving cavity 330, and the two ends of stop pin 321 contact with seal disc 200 with stationary ring 320 respectively, ensure stationary ring 320 transfixion and achieve rotating ring 310 can rotate relative to stationary ring 320, avoid in the process of mechanical seal work, the moment of torsion band dynamic and static ring 320 produced because rotating ring 310 rotates occurs in circumferential direction to offset and affects the generation of the sealing effect phenomenon of mechanical seal, ensure that the normal work of mechanical seal.
Preferably, stop pin 321 is arranged with spring 340, and between stop pin 321 and stationary ring 320, be provided with spring 340 pad, the two ends of spring 340 are resisted against on the inwall of spring 340 pad and receiving cavity 330 respectively, the setting of spring 340 ensure that stationary ring 320 transfixion further and the relative stationary ring 320 of rotating ring 310 is relatively rotated, the setting of spring 340 simultaneously ensure that when rotating ring 310 and stationary ring 320 work generation wearing and tearing for a long time, both stationary ring 320 and rotating ring 310 also can be fitted tightly, ensure that the sealing effect of mechanical seal, improve the working life of mechanical seal.
Drive sleeve 300 is provided with fastening ring 350, fastening ring 350 and drive sleeve 300 offer coaxial through hole 351, socket head screw 352 is connected with at through hole 351 internal thread, and described interior hexagonal screw thread can be resisted against in rotating shaft 100 through through hole 351, ensure that drive sleeve 300 can with rotating shaft 100 synchronous axial system, thus make fastening ring 350 serve as main driving component, in the process that rotating shaft 100 drives rotating ring 310 to rotate, torsion is passed to fastening ring 350 and is passed to drive sleeve 300 by fastening ring 350 by rotating shaft 100, and make rotating ring 310 and drive sleeve 300 synchronous axial system, owing to driving drive sleeve 300 to rotate by fastening ring 350, therefore torsion is born primarily of fastening ring 350, even if drive sleeve 300 contacts with rotating shaft 100, but larger moment of torsion can not be produced instantaneously between drive sleeve 300 and rotating shaft 100, avoid because moment of torsion is excessive and cause drive sleeve 300 to be torn or the generation of phenomenon of breakage, therefore the sealing that ensure that this mechanical seal better and can not lose efficacy, also improve the working life of this mechanical seal simultaneously.
Preferably, positioning block 353 is also provided with between screw and fastening ring 350, positioning block 353 has extended to form joint 354 near seal disc 200 side, positioning part 355 is fixed with in the lower end of joint 354, seal disc 200 offers the circular groove 356 corresponding with positioning part 355, in the process of installing, positioning part 355 is positioned at circular groove 356, socket head screw 352 can pass positioning block 353 and be threadedly connected on fastening ring 350, thus ensure that the positioning precision of socket head screw 352 and fastening ring 350, facilitate the installation of fastening ring 350 and socket head screw 352, thus improve the installation efficiency of mechanical seal, and positioning block 353 can be removed after the complete installation of mechanical seal.
The first groove 400 is offered between drive sleeve 300 and rotating ring 310, dynamic seal ring 410 is provided with in the first groove 400, add the frictional force between rotating ring 310 and drive sleeve 300, when drive sleeve 300 drives rotating ring 310 to rotate by driving pin 311, frictional force energy helper drive pin 311 between drive sleeve 300 and rotating ring 310 drives rotating ring 310 to rotate, thus shared the driving force of driving pin 311, improve the working life of follower pin, also rotating ring 310 and environment facies can be completely cut off simultaneously, the medium in some particular surroundingss is prevented to contact with rotating ring 310, rotating ring 310 is caused to the generation of the phenomenon of corrosion and wearing and tearing, add the working life of rotating ring 310.
The second groove 500 is offered between stationary ring 320 and seal disc 200, static sealing ring 510 is provided with in the second groove 500, the setting of static sealing ring 510 adds the frictional force between stationary ring 320 and seal disc 200, thus stop pin 321 can be assisted to make to form velocity ratio between stationary ring 320 transfixion and rotating ring 310, stop pin 321 and spring 340 can effectively completely cut off by arranging of static sealing ring 510 simultaneously, avoid in process stationary ring 320 and rotating ring 310 cooled in cooling liquid, cooling liquid enters in cavity volume the normal work causing the corrosion of stop pin 321 and spring 340 or have impact on spring 340 and stop pin 321, ensure that the normal work of stop pin 321 and spring 340, improve the working life of stop pin 321 and spring 340.
The 3rd groove 600 is offered between drive sleeve 300 and rotating shaft 100, transmission seal circle 610 is provided with in the 3rd groove 600, transmission seal circle 610 arranges the frictional force added between drive sleeve 300 and rotating shaft 100, effectively prevent the generation occurring skidding between drive sleeve 300 and rotating shaft 100, the setting of transmission seal circle 610 simultaneously too increases the sealing effect between drive sleeve 300 and rotating shaft 100.
Seal disc 200 is made up of composite material, and described composite material is made up of following composition and parts by weight thereof: polyurethane: 100 parts, epoxy resin: 15-25 part, hydroxylating multi-wall carbon nanotube: 0.1-3 part, filler: 0.5-3 part, auxiliary agent: 2-15 part.
Below by way of specific embodiment, seal disc is further described.
Embodiment 1:
Raw material is taken: polyurethane: 100 parts by following parts by weight, epoxy resin: 20 parts, hydroxylating multi-wall carbon nanotube: 2 parts, particle diameter is the nano titanium oxide of 40nm: 2 parts, fitter acids and its ester series lubricant agent: 1 part, POE-g-MAH:2 part, Hinered phenols antioxidant: 3 parts, alkyl sulfonic acid: 2 parts, wherein, polyethyleneglycol, pentaerythritol are grafted to obtained hydroxylating multi-wall carbon nanotube on multi-wall carbon nanotube by azide method by described hydroxylating multi-wall carbon nanotube respectively.
The raw material of said ratio is rendered in blender and mixes, pour melting in extruder again into, extrude, pelletizing obtains composite material, then composite material is put into and framedly carry out hot pressing plasticizing, mill frame after hot pressing completes carries out cold moudling, colded pressing rear taking-up seal disc crude product, trimming obtains seal disc finished product.
Embodiment 2
Raw material is taken: polyurethane: 100 parts by following parts by weight, epoxy resin: 22 parts, hydroxylating multi-wall carbon nanotube: 1 part, particle diameter is the nano titanium oxide of 30nm: 1 part, fatty acid amide: 2 parts, phenolic resin: 3 parts, phosphite ester kind antioxidant: 5 parts, alkyl sulfonic acid: 2 parts, wherein, polyethyleneglycol, pentaerythritol are grafted to obtained hydroxylating multi-wall carbon nanotube on multi-wall carbon nanotube by azide method by described hydroxylating multi-wall carbon nanotube respectively.
The raw material of said ratio is rendered in blender and mixes, pour melting in extruder again into, extrude, pelletizing obtains composite material, then composite material is put into and framedly carry out hot pressing plasticizing, mill frame after hot pressing completes carries out cold moudling, colded pressing rear taking-up seal disc crude product, trimming obtains seal disc finished product.
Embodiment 3
Raw material is taken: polyurethane: 100 parts by following parts by weight, epoxy resin: 25 parts, hydroxylating multi-wall carbon nanotube: 1 part, particle diameter is the nano titanium oxide of 60nm: 3 parts, organo-silicon compound: 0.5 part, silane coupling agent: 0.5 part, suffocated amine antioxidant: 2 parts, the alkali metal salt of aminodithioformic acid: 0.5 part, wherein, polyethyleneglycol, pentaerythritol are grafted to obtained hydroxylating multi-wall carbon nanotube on multi-wall carbon nanotube by azide method by described hydroxylating multi-wall carbon nanotube respectively.
The raw material of said ratio is rendered in blender and mixes, pour melting in extruder again into, extrude, pelletizing obtains composite material, then composite material is put into and framedly carry out hot pressing plasticizing, mill frame after hot pressing completes carries out cold moudling, colded pressing rear taking-up seal disc crude product, trimming obtains seal disc finished product.
Embodiment 4
Raw material is taken: polyurethane: 100 parts by following parts by weight, epoxy resin: 15 parts, hydroxylating multi-wall carbon nanotube: 0.5 part, particle diameter is the nano titanium oxide of 20nm: 3 parts, fitter acids and its ester class: 3 parts, POE-g-MAH:5 part, Hinered phenols antioxidant: 2 parts, suffocated amine antioxidant: 1 part, alkyl sulfonic acid: 3 parts, wherein, polyethyleneglycol, pentaerythritol are grafted to obtained hydroxylating multi-wall carbon nanotube on multi-wall carbon nanotube by azide method by described hydroxylating multi-wall carbon nanotube respectively.
The raw material of said ratio is rendered in blender and mixes, pour melting in extruder again into, extrude, pelletizing obtains composite material, then composite material is put into and framedly carry out hot pressing plasticizing, mill frame after hot pressing completes carries out cold moudling, colded pressing rear taking-up seal disc crude product, trimming obtains seal disc finished product.
Common commercially available seal disc in seal disc obtained in embodiment 1-4 and prior art is carried out Performance Detection, and testing result is as shown in table 1.
Table 1: the Performance comparision of the seal disc in embodiment 1-4 and conventional seals dish
In sum, the structure improved mechanical seal of the present invention adopts the rational composite material of compatibility to make seal disc, increase substantially the combination property of seal disc, as wear resistance, intensity, corrosion resistance, increase substantially sealing and the working life of seal disc, and then improve the working life of mechanical seal of the present invention.
Specific embodiment described herein is only to the explanation for example of the present invention's spirit.Those skilled in the art can make various amendment or supplement or adopt similar mode to substitute to described specific embodiment, but can't depart from spirit of the present invention or surmount the scope that appended claims defines.
Claims (9)
1. a structure improved mechanical seal, the drive sleeve comprising rotating shaft, seal disc and be arranged between rotating shaft and seal disc, it is characterized in that, rotating ring and stationary ring is provided with between drive sleeve and seal disc, the rear end of described rotating ring is affixed on the front end of stationary ring and rotating ring can rotate relative to stationary ring, annular receiving groove is formed between stationary ring and seal disc, the joint of described rotating ring and stationary ring is positioned at annular receiving groove, seal disc offers and to communicate with annular receiving groove and liquid storage cylinder for storing cooling liquid, wherein, described seal disc is made up of composite material.
2. in the structure improved mechanical seal of one according to claim 1, it is characterized in that, described drive sleeve is equipped with locating stud, described rotating ring offers the fixed groove corresponding with locating stud, and described locating stud is positioned at fixed groove.
3. in the structure improved mechanical seal of one according to claim 1 and 2, it is characterized in that, between drive sleeve and seal disc, be formed with receiving cavity, the stop pin that two ends are connected with seal disc with stationary ring is respectively installed in receiving cavity.
4. in the structure improved mechanical seal of one according to claim 3, it is characterized in that, drive sleeve is provided with the fastening ring with through hole, is connected with socket head screw at through hole internal thread, and described socket head screw can stretch out through hole and be resisted against in rotating shaft.
5. in the structure improved mechanical seal of one according to claim 4, it is characterized in that, also positioning block is provided with between socket head screw and fastening ring, described positioning block has extended to form joint near seal disc side, joint is fixed with positioning part, seal disc is provided with the circular groove corresponding with positioning part, and described position point is in circular groove.
6., in the structure improved mechanical seal of one according to claim 1, it is characterized in that, between drive sleeve and rotating ring, offer the first groove, in the first groove, be provided with dynamic seal ring.
7., in the structure improved mechanical seal of one according to claim 1, it is characterized in that, between stationary ring and seal disc, offer the second groove, in the second groove, be provided with static sealing ring.
8. in the structure improved mechanical seal of one according to claim 1, it is characterized in that, between drive sleeve and rotating shaft, offer the 3rd groove, in the 3rd groove, be provided with transmission seal circle.
9. in the structure improved mechanical seal of one according to claim 1, it is characterized in that, seal disc composite material used is made up of following composition and parts by weight thereof: polyurethane: 100 parts, epoxy resin: 15-25 part, hydroxylating multi-wall carbon nanotube: 0.1-3 part, filler: 0.5-3 part, auxiliary agent: 2-15 part.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510337332.3A CN104989828A (en) | 2015-06-17 | 2015-06-17 | Mechanical seam with improved structure |
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| CN201510337332.3A CN104989828A (en) | 2015-06-17 | 2015-06-17 | Mechanical seam with improved structure |
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| CN108843790A (en) * | 2018-07-13 | 2018-11-20 | 侯玉琼 | A kind of Mechanical seal |
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