CN201368199Y - Self-balance type mechanical seal - Google Patents
Self-balance type mechanical seal Download PDFInfo
- Publication number
- CN201368199Y CN201368199Y CNU200920146090XU CN200920146090U CN201368199Y CN 201368199 Y CN201368199 Y CN 201368199Y CN U200920146090X U CNU200920146090X U CN U200920146090XU CN 200920146090 U CN200920146090 U CN 200920146090U CN 201368199 Y CN201368199 Y CN 201368199Y
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- CN
- China
- Prior art keywords
- spring
- ring
- retainer
- rotating ring
- self
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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 - Lifetime
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Abstract
The utility model discloses a self-balance type mechanical seal, wherein a movable ring assembly comprises a movable sealing ring (13), a spring (7), a drive seat (9) and a movable ring (5) which are connected with a shaft (10), wherein a spring groove (8) is arranged on the drive seat (9), the two ends of the spring (7) are respectively supported between a spring pad (6) and the spring groove (8), three planes I (15) are evenly arranged on the external circumferential surface of the movable ring (5), three convex edges (9.1) are evenly arranged on the left end surface of the drive seat (9), the inner side of the convex edge (9.1) is provided with a plane II (19) which matches with the plane I (15), and an arc groove (17) is arranged on the plane II (19), a straight line gap edge (18) is arranged on the external circumference of the spring pad (6), a step inner hole is arranged on the right end of the movable ring (5), and the movable sealing ring (13) is arranged in the step inner hole in the interference fit. The self-balance type mechanical seal has long service life, stable drive and small bearing force of the movable ring, not only can simply and conveniently detach the movable ring, but also can guarantee the movable ring not to abrade in the detachment process.
Description
Technical field
The utility model relates to a kind of self-balanced mechanical seal that is used for machinery such as pump starting seal action.
Background technique
As everyone knows, in order to reach the effect of motive sealing, the rotating ring in all mechanical seals all will rotate with axle down in working order together.At present, the rotating ring in the traditional mechanical sealing is generally realized synchronous rotation with axle by following three kinds of Placements: 1, with on the drive sleeve of axle interference fit be connected with driving pin, rotating ring is provided with the transmission pin-and-hole; One end of described driving pin is positioned at the transmission pin-and-hole, adopt this structure after, can drive the rotating ring rotation by driving pin with the drive sleeve of axle interference fit; 2, the non-operative end surface close-fitting of rotating ring is at the rubber corrugated pipe head, a rubber corrugated pipe afterbody and an axle interference fit since the non-operative end surface of rotating ring be close-fitting at the rubber corrugated pipe head, therefore, when rubber corrugated pipe rotate along with axle, can drive rotating ring and rotate; 3, the drive sleeve of fixedlying connected with axle is provided with lug, and rotating ring is provided with the axial notch that is used with lug, and by being used of lug and axial notch, drive sleeve just can drive the rotating ring rotation.
Above-mentioned three kinds of Placements have the following disadvantages respectively: 1, because effective area of contact of the cylinder cambered surface of driving pin and rotating ring is very little, therefore, in the working procedure of mechanical seal, driving pin meeting transmission is not steady, the stress that rotating ring bears can be bigger, thereby not only influence the motive sealing effect of mechanical seal, and can shorten the working life of mechanical seal; Though 2, the mode of rotating ring close-fitting on rubber corrugated pipe can guarantee the rotating ring stationarity of transmission in the course of the work, but the unloading process of rotating ring is cumbersome, in other words, when the user changed rotating ring, need open rubber corrugated pipe can split out rotating ring fully; 3, with to adopt driving pin to transmit rotating force similar, surface of contact between lug and the axial notch is also smaller, therefore, the transmission of drive sleeve neither be very steady, the stress that rotating ring bears also can be bigger, in addition, adopt driving pin and lug rotating ring to be worn in unloading process, thereby influence the working life of mechanical seal with cooperating of groove.
The model utility content
The technical problems to be solved in the utility model is, a kind of long service life is provided, stable drive not only, rotating ring meets with stresses little, and both can make the rotating ring dismounting simple, convenient, can guarantee the self-balanced mechanical seal that rotating ring can not be worn again in unloading process.
In order to solve the problems of the technologies described above, the utility model provides a kind of self-balanced mechanical seal with following structure: it comprises static components and moving ring assembly; Described moving ring assembly comprises rotating ring, dynamic seal ring, spring pad, spring and the retainer that is connected with axle by locking mechanism; Described rotating ring right side and spring pad are fitted; Described retainer is provided with spring groove; Described both ends of the spring withstands on respectively between spring pad and the spring groove; The circumferential outer surface of described rotating ring is evenly distributed with three planar I; Be evenly distributed with three convex edges on the left side of described retainer; The inboard of described convex edge is the planar I I that cooperates with planar I; Described planar I I is provided with arc groove; There is a straight line to lack the limit on the excircle of described spring pad; The right-hand member of described rotating ring is provided with inner bore of step; Described dynamic seal ring is interference fitted in the inner bore of step.
After adopting above structure, the utlity model has following advantage: because the utility model is in the circumferential outer surface of described rotating ring three planar I that evenly distributed, and be evenly distributed with three convex edges on the left side of described retainer, and the inboard of described convex edge is the planar I I that cooperates with planar I, being used of three planar I and three planar I I can realize that not only retainer transmits the function that rotating force is given rotating ring, and increased the surface of contact of retainer and rotating ring, thereby guaranteed the stationarity of retainer transmission, reduced the stress that rotating ring bears; In addition, because the drive connection between rotating ring and the retainer is just realized by three planar I and being used of three planar I I, they do not need to adopt driving pin of the prior art, lug, axial notch etc., therefore, the utility model not only makes the dismounting of rotating ring become simply, make things convenient for, and can guarantee that rotating ring can not be worn in unloading process, the stress that bears just because of rotating ring reduces greatly, and in unloading process, can not be worn yet, therefore, obtained working life of the present utility model prolonging greatly.
As a kind of improvement, the utility model also can comprise a sealing gasket; The left part of described sealing gasket is positioned at inner bore of step and is close to dynamic seal ring; The right-hand member of described sealing gasket and retainer left side are close to.The setting of sealing gasket can effectively be blocked dynamic seal ring and withdraw from the inner bore of step of rotating ring and influence sealing effect.
As another kind of improvement the of the present utility model, described locking mechanism can adopt following structure, and described retainer wall is provided with an axially open; The retainer of described opening both sides is provided with tapped hole; Be connected with fastening screw trip bolt on the described tapped hole.Adopt this structure locking device that retainer and axle are tightly held tightly, and make and become retainer and being connected of axle more simple, conveniently.
Description of drawings
Fig. 1 is that the utility model self-balanced mechanical seal is installed in the structural representation in the pump.
Fig. 2 is the structure for amplifying schematic representation of moving ring assembly among Fig. 1.
Fig. 3 is the decomposition texture schematic representation of Fig. 2.
As shown in the figure: 1, the pump housing, 2, the stationary ring seal ring, 3, stationary ring, 4, seal end plate, 5, rotating ring, 6, spring pad, 7, spring, 8, spring groove, 9, retainer, 9.1, the convex edge, 10, axle, 11, fastening screw trip bolt, 12, sealing gasket, 13, dynamic seal ring, 14, inner bore of step, 15, planar I, 16, opening, 17, arc groove, 18, lack the limit, 19, planar I I, 20, tapped hole.
Specific embodiment
Below in conjunction with accompanying drawing the utility model is described in further detail.
As Fig. 1, Fig. 2 and shown in Figure 3, in this specific embodiment, the utility model self-balanced mechanical seal comprises static components and moving ring assembly; Described static components specifically comprises stationary ring 3 and seal end plate 4; Described stationary ring 3 left ends and the pump housing 1 step are close to, and described stationary ring 3 right-hand members and seal end plate 4 steps are close to; Be provided with stationary ring seal ring 2 between described stationary ring 3 left ends and the pump housing 1 and between stationary ring 3 right-hand members and the seal end plate 4; Described moving ring assembly comprises rotating ring 5, dynamic seal ring 13, spring pad 6, four springs 7, sealing gasket 12 and by locking mechanism and axle 10 retainers that are connected 9; Described rotating ring 5 right sides and spring pad 6 are fitted; Described retainer 9 is provided with four spring grooves 8; Described spring 7 two ends withstand on respectively between spring pad 6 and the spring groove 8, and the use of axle spring 7 can make the axially loaded of rotating ring 5 more even, thereby make sealing more stable, reliable.What locking mechanism described in this specific embodiment adopted is following concrete structure: described retainer 9 outer circumferential walls are provided with an axially open 16; The retainer 9 of described opening 16 both sides is provided with tapped hole 20; Be connected with fastening screw trip bolt 11 on the described tapped hole 20.
In this specific embodiment, the circumferential outer surface of described rotating ring 5 is evenly distributed with three planar I 15; Be evenly distributed with three convex edges 9.1 on the left side of described retainer 9; The inboard of described convex edge 9.1 is the planar I I 19 that cooperates with planar I 15; Described planar I I 19 is provided with arc groove 17; There is a straight line to lack limit 18 on the excircle of described spring pad 6, when user's mounting spring pad 6, at first to limit 18 alignment surface II 19 will be lacked, pressing down spring pad 6 then enters in the arc groove 17, rotating spring pad 6 gently at last, make its scarce limit 18 and arc groove 17 several angle that staggers mutually, thereby spring pad 6 is pushed down four springs 7 under arc groove 17 restrictions.In this specific embodiment, the right-hand member of described rotating ring 5 is provided with inner bore of step 14; Described dynamic seal ring 13 is interference fitted in the inner bore of step 14; The left part of described sealing gasket 12 is positioned at inner bore of step 14 and is close to dynamic seal ring 13; The right-hand member of described sealing gasket 12 and retainer 9 left sides are close to.Since in the utility model not only dynamic seal ring 13 be positioned at inner bore of step 14 fully, and described sealing gasket 12 also some is positioned at inner bore of step 14, this makes axial dimension of the present utility model dwindle greatly, has saved axial installing space of the present utility model.
Claims (3)
1, a kind of self-balanced mechanical seal, it comprises static components and moving ring assembly; Described moving ring assembly comprises rotating ring (5), dynamic seal ring (13), spring pad (6), spring (7) and the retainer (9) that is connected with axle (10) by locking mechanism; Described rotating ring (5) right side and spring pad (6) are fitted; Described retainer (9) is provided with spring groove (8); Described spring (7) two ends withstand on respectively between spring pad (6) and the spring groove (8), it is characterized in that: the circumferential outer surface of described rotating ring (5) is evenly distributed with three planar I (15); Be evenly distributed with three convex edges (9.1) on the left side of described retainer (9); The inboard of described convex edge (9.1) is the planar I I (19) that cooperates with planar I (15); Described planar I I (19) is provided with arc groove (17); There is a straight line to lack limit (18) on the excircle of described spring pad (6); The right-hand member of described rotating ring (5) is provided with inner bore of step (14); Described dynamic seal ring (13) is interference fitted in the inner bore of step (14).
2, self-balanced mechanical seal according to claim 1 is characterized in that: it also comprises a sealing gasket (12); The left part of described sealing gasket (12) is positioned at inner bore of step (14) and is close to dynamic seal ring (13); The right-hand member of described sealing gasket (12) and retainer (9) left side are close to.
3, self-balanced mechanical seal according to claim 1 and 2 is characterized in that: described locking mechanism is meant that described retainer (9) outer circumferential walls is provided with an axially open (16); The retainer (9) of described opening (16) both sides is provided with tapped hole (20); Be connected with fastening screw trip bolt (11) on the described tapped hole (20).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200920146090XU CN201368199Y (en) | 2009-03-24 | 2009-03-24 | Self-balance type mechanical seal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200920146090XU CN201368199Y (en) | 2009-03-24 | 2009-03-24 | Self-balance type mechanical seal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201368199Y true CN201368199Y (en) | 2009-12-23 |
Family
ID=41487092
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200920146090XU Expired - Lifetime CN201368199Y (en) | 2009-03-24 | 2009-03-24 | Self-balance type mechanical seal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201368199Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101532568B (en) * | 2009-03-24 | 2010-12-01 | 宁波东联密封件有限公司 | Self-balanced mechanical seal |
-
2009
- 2009-03-24 CN CNU200920146090XU patent/CN201368199Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101532568B (en) * | 2009-03-24 | 2010-12-01 | 宁波东联密封件有限公司 | Self-balanced mechanical seal |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20091223 Effective date of abandoning: 20090324 |