CN2591342Y - Mechanical sealing device for precision axis - Google Patents
Mechanical sealing device for precision axis Download PDFInfo
- Publication number
- CN2591342Y CN2591342Y CN 02251312 CN02251312U CN2591342Y CN 2591342 Y CN2591342 Y CN 2591342Y CN 02251312 CN02251312 CN 02251312 CN 02251312 U CN02251312 U CN 02251312U CN 2591342 Y CN2591342 Y CN 2591342Y
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- CN
- China
- Prior art keywords
- seal
- stationary ring
- bearing system
- sealing
- precision bearing
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- 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.)
- Expired - Fee Related
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Abstract
The utility model discloses an end surface sealing device for a precise shafting, particularly to a mechanical sealing device for a precise shafting. The utility model belongs to the technical field of mechanical sealing, which comprises an end surface sealing pair composed of a movable ring and a static ring, an elastic member, an auxiliary sealing device, a driving member, a member for preventing rotation and a fastening member, wherein, a regulating mechanism is arranged on the elastic compensation member. The utility model can ensure the request of strict sealing, and meanwhile, the influence of mechanical sealing on the precise shafting reaches the minimum. The application range of the mechanical sealing is enlarged. Moreover, the utility model solves the problem of rotary shaft sealing for optical precise instruments on ships at sea successfully.
Description
Technical field: the utility model relates to the precision bearing system mechanical seal device, belongs to mechanical sealing technology.
Background technique: mechanical seal is that a kind of usefulness solves the device that seals between running shaft and the body, be indispensable component in fluid machinery and the dynamic power machine, it is of great impact to the safety in production of entire machine equipment, complete equipment even whole factory, it is that a kind of elastic element that relies on is to the pretension of quiet, rotating ring end face seal pair and medium and compressing of elastic element and reach the axial end seal arrangement of sealing, so claim end face seal again.
The primary element that constitutes mechanical seal has: end face seal pair, elastic element, auxiliary seal, driving component, rotation preventing device and the fastening piece be made up of rotating ring and stationary ring.The effect of these primary elements and require as follows:
1, the end face seal pair of forming by rotating ring and stationary ring, its effect is that sealing surface is fitted tightly, and prevents dielectric leakage;
2, elastic compensating element, refer generally to spring, bellows, barrier film etc., it mainly plays pretension, compensation and buffering effect, requires to remain the inertia that enough elasticity overcomes the friction of auxiliary seal and driving component and rotating ring etc., guarantees the good driving fit of end face seal and the tracing ability of rotating ring;
3, auxiliary seal generally adopts O type, V-type, U type, wedge type or abnormity circle, and the seal action of its main starter ring and stationary ring also plays and float and the buffering effect simultaneously;
4, driving component generally is made of driving pin, transmission ring, retainer, driving key transmission lug or castellated coupling piece etc., mainly plays the effect of the torque of axle being passed to rotating ring;
5, fastening piece generally comprises Cock screw, spring seat, gland, assembling cover, axle sleeve etc., and it plays fastening, the positioning action of dynamic and static ring.
6, rotation preventing device can play the effect that prevents that stationary ring from rotating and deviating from.
Mechanical seal mainly contains following characteristics:
1, leakage rate can be restricted to seldom;
2, the life-span is long;
3, need not adjust in the running;
4, the resistance to vibration specific diameter is to good seal;
5, complex structure, dismounting inconvenience.
Based on above characteristics, mechanical seal has been widely used in rotary type fluid machines such as pump, compressor, reaction stirred tank, also is used for sealings such as gear-box, valve, swivel joint, marine rear shaft.Generally be applied on the turning axle of higher rotating speed.
But turning axle for precision optical instrument, general mechanical seal is used just has very big problem, reason is that the axle of precision optical instrument is to rock precision all to require in 1-5 scope second, and general mechanical seal is all very big to the pressure of axle, be easy to the second class precision of axle system is impacted, to such an extent as to axle system can not carry out normal precision tracking, simultaneously because friction torque is very big, cause the dead band bandwidth big, influence the low speed precision tracking of instrument, the axial float that produces along with the wearing and tearing of sealing pair in addition also will produce a very large impact shafting precision, and sealing pair has wearing and tearing just must change slightly.Marine naval vessel optical precision instrument is worked under rugged environment such as seawater, moist salt fog, and this integral sealing to optical instrument has proposed very strict requirement again, and so traditional mechanical seal mode that requires is to be difficult to satisfy.
The model utility content: the purpose of this utility model provides and a kind ofly can effectively seal and to the minimum mechanical seal device of shafting precision influence, specifically just provide a kind of mechanical seal device that is used on the precision optical instrument turning axle.
For achieving the above object, but mechanical seal device of the present utility model adopts paramodulant elastic compensating element, realizes that by controlling mechanism the elastic force of elastic compensating element can be adjusted within the specific limits, thereby effectively controls the pretightening force between sealing pair.Rotation preventing device adopts the pin positioning device, makes the elastic compensating element not produce radial-play in compensation and adjustment process or to axle system generation diametral interference power.Described controlling mechanism can adopt at stationary ring pedestal and spring opposite position and be provided with tapped hole, and make by described tapped hole and adjust the mode that screw is butted on a side end face of spring, also can be other known mechanical adjustment mode.Described pin positioning device can adopt general cylindrical pin, preferably employing is the special pin of bulb with the rotating ring contact jaw, because adopt the bulb pin that the area of contact of pin and rotating ring is reduced, the axial elastic force requirement of spring is also reduced accordingly, compensating action can more be given full play to.
After adopting mechanical seal device of the present utility model, can guarantee to make the precision influence minimum of mechanical seal when strict seal requires to precision bearing system, the application area of the mechanical seal that enlarges, successful solution the rotating shaft seal problem of marine ships usefulness optical precision instrument.Because the elastic compensating element can regulate, make seal arrangement can be at elastic force less or mount and dismount operation when not applying elastic force, make the installation of mechanical seal and keep in repair more convenient.In addition, the small amount of wear of sealing pair can compensate by controlling mechanism, has reduced maintenance cost, has prolonged the effective storage life of instrument, has improved its operational safety.
Description of drawings: Fig. 1 represents the basic structure of mechanical seal in the utility model.Among the figure: 1-stationary ring pedestal; The 2-auxiliary seal; 3-stationary ring ring; 4-lubricant grease groove; The 5-rotating ring; The 6-straight pin; The 7-spring; The 8-adjusting screw.Specifying this accompanying drawing simultaneously is the specification digest accompanying drawing.
Embodiment: the utility model is carried out specific description below in conjunction with accompanying drawing:
Used mechanical seal device of the present utility model when being manufacturing and designing the axle of marine naval vessel with the high-precision optical precision type instrument, belong to many springs spring standing machanical seal structure, its concrete structure is as shown in drawings: whole device is by comprising the end face seal pair of being made up of stationary ring 3 and rotating ring 5, spring 7, auxiliary seal 2, driving component, rotation preventing device and fastening piece, the controlling mechanism of elastic compensating element is formed, wherein the controlling mechanism of elastic compensating element is to be provided with tapped hole at stationary ring pedestal 1 and spring 7 opposite positions, adjust screw 8 is butted on spring 7 by described tapped hole a side end face, when adjusting screw 8 holddown spring 7 when spring 7 directions screw in, the elastic force that spring 7 acts on sealing pair increases, when adjustment screw 8 screws out round about, spring 7 is lax, and the pressure between sealing pair is reduced.No matter spring 7 is in pretension, compensation, buffering and adjustment process, straight pin 6 can both effectively guarantee the radially accurate location and axially adjustable of 1 of stationary ring 3 and stationary ring pedestal.Adopted end face bulb type pin in this embodiment, made that retention wire contacts between pin and stationary ring, surface friction drag is little.Stationary ring 3 and rotating ring 5 coating surface roughness and planeness after polishing in relative rotation all reach micron order, and sealing essence is that two surfaces of fitting compress under the effect of counterbalance spring mutually, combines closely between the molecule.Seal face adopts two kinds of different materials pairings of soft or hard, and wherein stationary ring 3 usefulness graphite soak the composite material of metal, and the cemented carbide that rotating ring 5 usefulness are stainless is considered the wearing and tearing and the cooperation of end face, and the stationary ring 3 of soft material is set as narrow ring, and the rotating ring 5 of hard material is set as wide ring.Simultaneously bonding for the friction surface that prevents sealing pair, reduce to start the resistance square, both ends of the surface are designed to different roughness values.Being provided with 3 at stationary seal ring has seal lubrication grease groove 4, promptly can selflubricating can reduce the temperature of seal face again.Auxiliary seal 2 adopts the nitrile rubber seal ring of sea water resistance and salt spray corrosion.
Certainly, the technical solution of the utility model is not limited only to above-mentioned mode of execution, can use equally the mechanical seal device that uses single spring or elastic compensating elements such as bellows, barrier film.It is described that controlling mechanism also is not limited to above-mentioned embodiment, can adopt to regulate the elastic compensating element such as alternate manners such as changing the different length apical axis and act on pressure between sealing pair.Also can use bolt to replace pin to realize the rotation preventing device function in some cases.
Claims (7)
1, a kind of precision bearing system face seals comprises end face seal pair, elastic element, auxiliary seal (2), driving component, rotation preventing device and the fastening piece be made up of rotating ring (5) and stationary ring (3), it is characterized in that the controlling mechanism of elastic compensating element in addition.
2, a kind of precision bearing system face seals according to claim 1, the controlling mechanism that it is characterized in that described elastic compensating element is that stationary ring pedestal (1) is provided with tapped hole with spring (7) opposite position, makes by described tapped hole and adjusts the side end face that screw (8) afterbody is butted on spring (7).
3, a kind of precision bearing system face seals according to claim 1 and 2 is characterized in that described rotation preventing device is straight pin (6).
4, a kind of precision bearing system face seals according to claim 3 is characterized in that stationary ring (3) contact jaw of described straight pin (6) is a bulb-type.
5, a kind of precision bearing system face seals according to claim 1 and 2 is characterized in that being provided with seal lubrication grease groove (4) at described stationary ring (3).
6, a kind of precision bearing system face seals according to claim 3 is characterized in that being provided with seal lubrication grease groove (4) at described stationary ring (3).
7, a kind of precision bearing system face seals according to claim 4 is characterized in that being provided with seal lubrication grease groove (4) at described stationary ring (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02251312 CN2591342Y (en) | 2002-12-12 | 2002-12-12 | Mechanical sealing device for precision axis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02251312 CN2591342Y (en) | 2002-12-12 | 2002-12-12 | Mechanical sealing device for precision axis |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2591342Y true CN2591342Y (en) | 2003-12-10 |
Family
ID=33721206
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02251312 Expired - Fee Related CN2591342Y (en) | 2002-12-12 | 2002-12-12 | Mechanical sealing device for precision axis |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2591342Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101700508A (en) * | 2009-11-23 | 2010-05-05 | 江苏赛德力制药机械制造有限公司 | Scraper centrifugal machine with adjustable clearance sealing device |
| CN102019234A (en) * | 2010-10-27 | 2011-04-20 | 江苏牡丹离心机制造有限公司 | Sealing device for centrifuge main shaft |
| CN102943938A (en) * | 2012-11-27 | 2013-02-27 | 中国船舶重工集团公司第七一○研究所 | Adaptive floating seal mechanism |
| CN108591465A (en) * | 2018-05-24 | 2018-09-28 | 江苏海川卓越密封材料有限公司 | A kind of piston rod seal component easy to use |
| CN109058466A (en) * | 2018-09-29 | 2018-12-21 | 天津包博特密封科技有限公司 | A kind of dredger automatic compensation type mechanical seal |
-
2002
- 2002-12-12 CN CN 02251312 patent/CN2591342Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101700508A (en) * | 2009-11-23 | 2010-05-05 | 江苏赛德力制药机械制造有限公司 | Scraper centrifugal machine with adjustable clearance sealing device |
| CN102019234A (en) * | 2010-10-27 | 2011-04-20 | 江苏牡丹离心机制造有限公司 | Sealing device for centrifuge main shaft |
| CN102943938A (en) * | 2012-11-27 | 2013-02-27 | 中国船舶重工集团公司第七一○研究所 | Adaptive floating seal mechanism |
| CN108591465A (en) * | 2018-05-24 | 2018-09-28 | 江苏海川卓越密封材料有限公司 | A kind of piston rod seal component easy to use |
| CN109058466A (en) * | 2018-09-29 | 2018-12-21 | 天津包博特密封科技有限公司 | A kind of dredger automatic compensation type mechanical seal |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |