CN104564793A - Dynamic sealing device - Google Patents
Dynamic sealing device Download PDFInfo
- Publication number
- CN104564793A CN104564793A CN201510025677.5A CN201510025677A CN104564793A CN 104564793 A CN104564793 A CN 104564793A CN 201510025677 A CN201510025677 A CN 201510025677A CN 104564793 A CN104564793 A CN 104564793A
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- China
- Prior art keywords
- ring
- elastic component
- dynamic seal
- seal apparatus
- spring
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/08—Sealings
- F04D29/10—Shaft sealings
- F04D29/12—Shaft sealings using sealing-rings
- F04D29/126—Shaft sealings using sealing-rings especially adapted for liquid pumps
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Mechanical Sealing (AREA)
Abstract
The invention provides a dynamic sealing device for sealing a pump shaft end. The dynamic sealing device is coaxially connected with a pump shaft and is positioned between a pump cover and a pump impeller shaft. The dynamic sealing device comprises a static device and a floating device. According to the dynamic sealing device, the static device is a non-compensating device, the floating device is a compensating device, the end surfaces of the two devices are clung to each other, the sealing surfaces are clung well to each other through a spring and an elastic part, and therefore, the effective compensation of the floating device is ensured, and the buffering force is provided. The dynamic sealing device has the advantages of being reliable in sealing effect, long in service life, long in repair cycle, small in frictional power consumption, and free of shaft or shaft sleeve wearing.
Description
Technical field
The present invention relates to a kind of mechanical seal device, particularly relate to a kind of dynamic seal apparatus for pump shaft end seal.
Background technique
Dishwasher is used to the equipment automatically cleaning the tablewares such as bowl, chopsticks, dish, dish, cutter, fork, can be divided into the box and large class of transmitted type two by structure.It is dining room, hotel, institutional settings dining room kitchen alleviate labor intensity, improve working efficiency, and promote sanitation and hygiene.Now, multiple mini-dishwasher goes on the market, and just progresses into ordinary family.
The main working parts of dishwasher is washer pump, and washer pump has important function in dishwasher process.The liquid flowing through washer pump contains the liquid of washing agent and dining residue, very large to the damage of washer pump, and the time has been grown and easily caused washer pump to produce the phenomenon revealed, and therefore needs seal arrangement to prevent the leakage of liquid to its sealing.
Mechanical seal is the common seal arrangement be applied in pump, it is by least one pair of seal face perpendicular to spin axis, under hydrodynamic pressure and compensation mechanism elastic force (or magnetic force) acting in conjunction, and under the cooperation of auxiliary seal ring, seal face keeps laminating and relative sliding, and the device that the anti-fluid of composition is leaked.
Mechanical seal of the prior art designs for the liquid property flowing through pump, and as CN102472393A discloses a kind of mechanical seal, it is mainly used in the turbomachine sealing in parallel that cooling fluid circulates near sealing surface; CN102182701A discloses a kind of mechanical seal, it by arranging rigid backbone on the axle sleeve coordinated with rotating ring and/or the stationary seat coordinated with stationary ring, the outside bag of described rigid backbone is provided with anti-corrosion layer to reach length service time, to seal reliable object, but structure is more complicated; A kind of mechanical seal that CN101490453A discloses, sealing device can be applied to the rotating equipment of nearly all industrial class.
Summary of the invention
For the problem lacking Washing pump of bowl-washing machines mechanical seal in prior art, the invention provides a kind of dynamic seal apparatus being applied to Washing pump of bowl-washing machines, this dynamic seal apparatus has that sealing effect is reliable, long service life, service cycle is long, friction horsepower consumption less with axle or the not frayed advantage of axle sleeve.
For achieving the above object, the present invention is by the following technical solutions:
The invention provides a kind of dynamic seal apparatus, for the sealing of pump shaft end, this dynamic seal apparatus is coaxially connected with described pump shaft, between pump cover and pump rachis, comprises stationary apparatus and floating installation, wherein:
Described stationary apparatus comprises flat circular stationary ring and a seal ring, and described seal ring is enclosed within to seal on this stationary ring one end face, with described pump cover and contacts, and the other end of described stationary ring contacts with described floating installation and connects;
Described floating installation comprises rotating ring that can be freely movable, elastic component and the spring be enclosed within this elastic component, described rotating ring is fixed on pump shaft by elastic component sealing, one end face of described rotating ring contacts with described stationary ring, other end contacts with described elastic component, described elastic component is a tubulose, it is respectively provided with the boss radially outwards extended end to end, head boss diameter is not less than described rotating ring diameter, afterbody boss diameter is less than head boss diameter, one side of head boss contacts with described rotating ring, its another side provides compression supporting surface for the spring be enclosed within tubular elastomeric part, for described spring-compressed is between described rotating ring and described pump rachis.
In a preferred embodiment of above-mentioned dynamic seal apparatus, between described rotating ring and described stationary ring, a rotating seat is also set, the end face contacted with described stationary ring at this rotating seat radially extends internally a stop part, other end is to axially extended inclined-plane, hold described rotating ring and described elastic component in the cylindrical cavity of described rotating seat, described rotating ring and described elastic component are limited in the cylindrical cavity of described rotating seat by described inclined-plane.
Wherein, the end face that described rotating ring contacts with the head boss of described elastic component radially stretches out a limiting unit, by the stop part on described rotating seat, described rotating ring is limited in described rotating seat, and the other end of described rotating ring contacts with described stationary ring.
In another preferred embodiment of above-mentioned dynamic seal apparatus, between the compression supporting surface of described elastic component and described spring, a spring seat is also set, the end face contacted with described compression supporting surface at this spring seat radially extends internally a back-up ring, and described spring action is on this back-up ring.
In a preferred embodiment of above-mentioned dynamic seal apparatus, also arrange a fastening piece and described pump rachis close contact at the end of described floating installation, described fastening piece is a multiple stage rank securing means; One end is have minimum diameter stepped part with crimping, and this stepped part is stuck in the groove be located in the middle part of described elastic component; Its other end is have maximum diameter stepped part with the platform extended radially outwardly, and this platform provides another compression supporting surface for spring; Described fastening piece is arranged to the transition portion of maximum diameter stepped part along the outer rim of the afterbody boss of described elastic component by minimum diameter stepped part.
For better realizing the effect sealed, the material of the present invention to above-mentioned each parts has done further restriction, wherein, the material of described stationary ring be selected from pottery, plastics, material with carbon element, composite material any one or multiple, be more preferably pottery; The material of described seal ring and described elastic component is preferably rubber; The material of described rotating ring is preferably fluoro-containing plastic, is more preferably teflon; The material of described rotating seat or described spring seat be selected from stainless steel, aluminium, copper any one or multiple, be more preferably stainless steel.
Above-mentioned dynamic seal apparatus is in installation process, first seal ring is enclosed within an end face of stationary ring, the stationary ring of seal ring is had to be fixed on the pump cover of Washing pump of bowl-washing machines in cover again, then in the cylindrical cavity of rotating seat, rotating ring, elastic component, spring seat and spring is put into successively, rotating ring is fixed in rotating seat by the stop part of rotating seat by the limiting unit of one end, and the other end of rotating ring is stretched out rotating seat and contacted with stationary ring; Wherein, the bottom (outer side surface) of the head boss that elastic component diameter is larger contacts with the limiting unit of rotating ring, and the inner side surface of head boss provides compression supporting surface, by spring-compressed between rotating ring and pump rachis for the spring be enclosed within elastic component.
Alternatively, described dynamic seal apparatus is fixed between the pump cover of Washing pump of bowl-washing machines and pump rachis by fastening piece at the tail end of the floating installation of dynamic seal apparatus of the present invention.
Stationary apparatus of the present invention is non-compensation device, and floating installation is compensation device, and the two end face is bonded to each other, then adopts spring and elastic component that sealing surface is fitted more well, has ensured the effective compensation of floating installation and has provided cushion effect.
Adopt technique scheme, the pressure maximum that described dynamic seal apparatus is used for can bearing in dishwasher is 0.6bar, and the speed range that can bear is at 2750-5500rpm, and the temperature range can bearing solution in dishwasher is 20-100 DEG C.
Dynamic seal apparatus of the present invention also can be used for the sealing of other pump shaft end except Washing pump of bowl-washing machines.
The present invention adopts technique scheme, compared with prior art, has following technique effect:
1, sealing is reliable, in longer spreadable life, can not leak or small leaks;
2, long service life, the mechanical seal of selecting properly friction pair material and specific pressure can with 1 ~ 2 year;
3, service cycle is long, when normal work, does not need repairing;
4, friction horsepower consumption is few;
5, axle or axle sleeve are not frayed.
Accompanying drawing explanation
Fig. 1 is the sectional drawing of dynamic seal apparatus of the present invention;
Fig. 2 is the scheme of installation of dynamic seal apparatus of the present invention at Washing pump of bowl-washing machines;
Fig. 3 is the blasting type erection drawing of dynamic seal apparatus of the present invention;
Fig. 4 is the structural representation after dynamic seal apparatus of the present invention assembling;
Fig. 5 is the schematic perspective view of the stationary ring 11 of dynamic seal apparatus of the present invention;
Fig. 6 is the schematic perspective view of the seal ring 12 of dynamic seal apparatus of the present invention;
Fig. 7 is the schematic perspective view of the rotating ring 21 of dynamic seal apparatus of the present invention;
Fig. 8 is the schematic perspective view of the rotating seat 22 of dynamic seal apparatus of the present invention;
Fig. 9 is the schematic perspective view of the elastic component 23 of dynamic seal apparatus of the present invention;
Figure 10 is the schematic perspective view of the spring seat 24 of dynamic seal apparatus of the present invention;
Figure 11 is the schematic perspective view of the fastening ring 26 of dynamic seal apparatus of the present invention;
In figure:
1-stationary apparatus,
11-stationary ring,
12-seal ring,
2-floating installation,
21-rotating ring,
211-limiting unit,
22-rotating seat,
221-stop part,
222-cylindrical cavity,
223-inclined-plane,
23-elastic component,
231-head boss,
232-afterbody boss,
233-compresses supporting surface,
234-groove,
24-spring seat,
241-back-up ring,
25-spring,
26-fastening ring,
261-crimping,
262-minimum diameter stepped part,
263-maximum diameter stepped part,
264-platform,
3-pump cover,
4-pump shaft,
5-pump rachis.
Embodiment
Carry out detailed and concrete introduction below by specific embodiment to the present invention, to make better to understand the present invention, but following embodiment does not limit the scope of the invention.
Composition graphs 1 and Fig. 2, the invention provides a kind of dynamic seal apparatus, and for the sealing of dishwasher pump axle head, this dynamic seal apparatus is connected with described pump shaft 4 axle, between the pump cover 3 and pump rachis 5 of dishwasher pump, comprises stationary apparatus 1 and floating installation 2, wherein:
Described stationary apparatus 1 comprises flat circular stationary ring 11 (as shown in Figure 5) and a seal ring 12 (as shown in Figure 6), described seal ring 12 is enclosed within to seal on this stationary ring 11 1 end face, with the pump cover 3 of described Washing pump of bowl-washing machines and contacts, and the other end of described stationary ring 11 contacts with described floating installation 2 and connects;
Described floating installation 2 as shown in Figure 3, comprise can be freely movable rotating ring 21, elastic component 23 and the spring 25 be enclosed within this elastic component, described rotating ring 21 is fixed on pump shaft 4 by elastic component 23 sealing, one end face of described rotating ring 21 contacts with described stationary ring 11, other end contacts with described elastic component 23, described elastic component 23 is a tubulose (as shown in Figure 9), it is respectively provided with the boss radially outwards extended end to end, head boss 231 diameter is not less than described rotating ring 21 diameter, afterbody boss 232 diameter is less than head boss 231 diameter, one side of head boss 231 contacts with described rotating ring 21, supporting surface 233 is compressed for the spring 25 be enclosed within tubular elastomeric part 23 provides in its another side, for described spring 25 is compressed between described rotating ring 21 and described pump rachis 5.
One rotating seat 22 is also set between described rotating ring 21 and described stationary ring 11, as shown in Figure 8, the end face contacted with described stationary ring 11 at this rotating seat 22 radially extends internally a stop part 221, other end is to axially extended inclined-plane 223, hold described rotating ring 21 and described elastic component 23 in the cylindrical cavity 222 of described rotating seat 22, described rotating ring 21 and described elastic component 23 are limited in the cylindrical cavity 222 of described rotating seat 22 by described inclined-plane 223.
The end face that described rotating ring 21 contacts with the head boss 231 of described elastic component 23 radially stretches out a limiting unit 211 (as shown in Figure 7), by the stop part 221 on described rotating seat 22, described rotating ring 21 is limited in described rotating seat 22, and the other end of described rotating ring 21 contacts with described stationary ring 11.
One spring seat 24 is also set between the compression supporting surface 233 of described elastic component 23 and described spring 25, the end face contacted with described compression supporting surface 233 at this spring seat 24 radially extends internally a back-up ring 241 (as shown in Figure 10), and described spring 25 acts on this back-up ring 241.
Also arrange a fastening piece 26 and described pump rachis 5 close contact (as illustrated in fig. 1 and 2) at the end of described floating installation 2, described fastening piece is a multiple stage rank securing means (as shown in figure 11); One end is have minimum diameter stepped part 262 with crimping 261, and this stepped part 262 is stuck in the groove 234 be located in the middle part of described elastic component 23; Its other end is have maximum diameter stepped part 263 with the platform 264 extended radially outwardly, and this platform 264 provides another compression supporting surface for spring 25; Described fastening piece 26 is arranged to the transition portion of maximum diameter stepped part 263 along the outer rim of the afterbody boss 232 of described elastic component 23 by minimum diameter stepped part 262.
For better realizing the effect sealed, the material of the present invention to above-mentioned each parts has done further restriction, and wherein, the material of described stationary ring 11 is preferably pottery; The material of described seal ring 12 and described elastic component 23 is preferably rubber; The material of described rotating ring 21 is preferably fluoro-containing plastic, is more preferably teflon; The material of described rotating seat 22, described spring seat 24, described spring 25, described fastening piece 26 is preferably stainless steel, is more preferably 304 stainless steels.
Above-mentioned dynamic seal apparatus in installation process, composition graphs 1-11:
1) first seal ring 12 is enclosed within an end face of stationary ring 11, forms stationary apparatus 1.
2) then in the cylindrical cavity 222 of rotating ring 22, rotating ring 21, elastic component 23 is put into successively, rotating ring 21 is fixed in rotating seat 22 by the stop part 221 of rotating seat 22 by the limiting unit 211 of one end, and the other end of rotating ring 21 is stretched out rotating seat 22 with stationary ring 11 and contacted; Wherein, the bottom (outer side surface) of the head boss 231 that elastic component 23 diameter is larger contacts with the limiting unit 211 of rotating ring 21; Finally successively spring seat 24, fastening piece 26 and spring 25 are enclosed within elastic component 23, wherein the minimum diameter stepped part 262 of fastening piece 26 is stuck in the groove 234 of elastic component 23, the inner side surface of the head boss 231 of elastic component 23 compresses supporting surface 233 for the spring 25 be enclosed within elastic component 23 provides, the platform 264 of fastening piece 26 provides another compression supporting surface for spring 25, is compressed between rotating ring 21 and fastening piece 26 by spring 25.Such formation floating installation 2.
3) stationary apparatus 1 assembled and floating installation 2 are arranged between the pump cover 3 of Washing pump of bowl-washing machines and pump rachis 5 according to the position shown in Fig. 2.
Stationary apparatus 1 of the present invention is non-compensation device, and floating installation 2 is compensation device, and the two end face is bonded to each other, has ensured the effective compensation of floating installation 2 and has provided cushion effect.
Adopt technique scheme, described dynamic seal apparatus is applicable to the solution containing acid, alkali and grease, it to the requirement of working environment is: working depth is when 11.0 ± 0.5 scope, sealing total pressure is in the scope of 1.3 ± 0.4kg, rotation torque is 120mNM, pressure maximum for bearing in dishwasher is 0.6bar, and the speed range that can bear is at 2750-5500rpm, and the temperature range can bearing solution in dishwasher is 20-100 DEG C.
described dynamic seal apparatus is used for the Performance Detection in dishwasher:
Detect the performance of dynamic seal apparatus provided by the invention in general dish washer, it is under rotating speed 3500rpm, dry running 3h, sealing surface situation without exception; In 10 DEG C of-80 DEG C of water, open 9min, stop 1min, working life is not less than 6000h.
Therefore a kind of Washing pump of bowl-washing machines dynamic seal apparatus provided by the invention has good sealability, and the time in working life is long simultaneously.
Be described in detail specific embodiments of the invention above, but it is just as example, the present invention is not restricted to specific embodiment described above.To those skilled in the art, any equivalent modifications that the present invention is carried out and substituting also all among category of the present invention.Therefore, equalization conversion done without departing from the spirit and scope of the invention and amendment, all should contain within the scope of the invention.
Claims (10)
1. a dynamic seal apparatus, for the sealing of pump shaft end, is characterized in that, this dynamic seal apparatus is coaxially connected with described pump shaft, between pump cover and pump rachis, comprises stationary apparatus and floating installation, wherein:
Described stationary apparatus comprises flat circular stationary ring and a seal ring, and described seal ring is enclosed within to seal on this stationary ring one end face, with described pump cover and contacts, and the other end of described stationary ring contacts with described floating installation and connects;
Described floating installation comprises rotating ring that can be freely movable, elastic component, be enclosed within the spring on this elastic component, described rotating ring is fixed on pump shaft by elastic component sealing, one end face of described rotating ring contacts with described stationary ring, other end contacts with described elastic component, described elastic component is a tubulose, it is respectively provided with the boss radially outwards extended end to end, head boss diameter is not less than described rotating ring diameter, afterbody boss diameter is less than head boss diameter, one side of head boss contacts with described rotating ring, its another side provides compression supporting surface for the spring be enclosed within tubular elastomeric part.
2. dynamic seal apparatus according to claim 1, it is characterized in that, between described rotating ring and described stationary ring, a rotating seat is also set, the end face contacted with described stationary ring at this rotating seat radially extends internally a stop part, other end is to axially extended inclined-plane, hold described rotating ring and described elastic component in the cylindrical cavity of described rotating seat, described rotating ring and described elastic component are limited in the cylindrical cavity of described rotating seat by described inclined-plane.
3. dynamic seal apparatus according to claim 2, it is characterized in that, the end face that described rotating ring contacts with the head boss of described elastic component radially stretches out a limiting unit, by the stop part on described rotating seat, described rotating ring is limited in described rotating seat, and the other end of described rotating ring contacts with described stationary ring.
4. dynamic seal apparatus according to claim 1, it is characterized in that, between the compression supporting surface of described elastic component and described spring, a spring seat is also set, the end face contacted with described compression supporting surface at this spring seat radially extends internally a back-up ring, and described spring action is on this back-up ring.
5. dynamic seal apparatus according to claim 1, is characterized in that, also arranges a fastening piece and described pump rachis close contact at the end of described floating installation, and described fastening piece is a multiple stage rank securing means; One end is have minimum diameter stepped part with crimping, and this stepped part is stuck in the groove be located in the middle part of described elastic component; Its other end is have maximum diameter stepped part with the platform extended radially outwardly, and this platform provides another compression supporting surface for spring; Described fastening piece is arranged to the transition portion of maximum diameter stepped part along the outer rim of the afterbody boss of described elastic component by minimum diameter stepped part.
6. dynamic seal apparatus according to claim 1, is characterized in that, the material of described stationary ring be selected from pottery, plastics, material with carbon element, composite material any one or multiple.
7. dynamic seal apparatus according to claim 6, is characterized in that, the material of described stationary ring is pottery.
8. dynamic seal apparatus according to claim 1, is characterized in that, the material of described seal ring and described elastic component is rubber.
9. dynamic seal apparatus according to claim 1, is characterized in that, the material of described rotating ring is teflon.
10. the dynamic seal apparatus according to claim 2 or 4, is characterized in that, the material of described rotating seat or described spring seat be selected from stainless steel, aluminium, copper any one or multiple.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510025677.5A CN104564793A (en) | 2015-01-19 | 2015-01-19 | Dynamic sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510025677.5A CN104564793A (en) | 2015-01-19 | 2015-01-19 | Dynamic sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104564793A true CN104564793A (en) | 2015-04-29 |
Family
ID=53081642
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510025677.5A Pending CN104564793A (en) | 2015-01-19 | 2015-01-19 | Dynamic sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104564793A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106609846A (en) * | 2015-10-22 | 2017-05-03 | 浙江海峰制鞋设备有限公司 | Behind-pump sealing device |
| CN109600961A (en) * | 2017-09-30 | 2019-04-09 | 比亚迪股份有限公司 | Radiator, charging unit, vehicle and the charging gun of charging connector |
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| US7344356B1 (en) * | 2004-09-15 | 2008-03-18 | Wood Group Esp, Inc. | Mechanical seal with bellows seating alignment |
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| KR20140121153A (en) * | 2013-04-05 | 2014-10-15 | 현대중공업 주식회사 | Machanical seal |
| CN204805150U (en) * | 2015-01-19 | 2015-11-25 | 宁波天工机械密封有限公司 | Move sealing device |
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|---|---|---|---|---|
| CN2538991Y (en) * | 2002-04-27 | 2003-03-05 | 李文峰 | Sealing structure for washing water pump |
| US7344356B1 (en) * | 2004-09-15 | 2008-03-18 | Wood Group Esp, Inc. | Mechanical seal with bellows seating alignment |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106609846A (en) * | 2015-10-22 | 2017-05-03 | 浙江海峰制鞋设备有限公司 | Behind-pump sealing device |
| CN109600961A (en) * | 2017-09-30 | 2019-04-09 | 比亚迪股份有限公司 | Radiator, charging unit, vehicle and the charging gun of charging connector |
| CN109600961B (en) * | 2017-09-30 | 2020-11-20 | 比亚迪股份有限公司 | Radiator, charging device, vehicle and rifle that charges of connecting piece charge |
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Application publication date: 20150429 |