CN201368198Y - Improved mechanical seal - Google Patents
Improved mechanical seal Download PDFInfo
- Publication number
- CN201368198Y CN201368198Y CNU2009201460897U CN200920146089U CN201368198Y CN 201368198 Y CN201368198 Y CN 201368198Y CN U2009201460897 U CNU2009201460897 U CN U2009201460897U CN 200920146089 U CN200920146089 U CN 200920146089U CN 201368198 Y CN201368198 Y CN 201368198Y
- Authority
- CN
- China
- Prior art keywords
- ring
- elastic support
- seat
- drive sleeve
- spring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Mechanical Sealing (AREA)
Abstract
The utility model discloses an improved mechanical seal, wherein a movable ring assembly comprises a movable ring (13), a fastening ring (9) in the interference fit with a shaft (10), a rigid drive sleeve (11) whose tail inner hole is in the interference fit with the fastening ring (9), an elastic support (7) whose left end and right end are respectively provided with a ring-shaped lug boss (18) and a spring (12) supported between a movable ring seat (5) and a spring seat (8), wherein the inner circumferential surface of the movable ring (13) is provided with an axial groove (4) which is matched with a lug (6) on the external circumferential surface of the head portion of the rigid drive sleeve (11), the movable ring seat (5) and the spring seat (8) are respectively attached to the ring-shaped lug bosses (18) on the left end and the right end of the elastic support (7), the step end surface of the movable ring (13) is tightly attached to the ring-shaped lug boss (18) on the left end of the elastic support (7), and the tail step end surface of the rigid drive sleeve (11) is tightly attached to the ring-shaped lug boss (18) on the right end of the elastic support (7). The improved mechanical seal can not generate the twist-off phenomenon under the working state, thereby prolonging the service life.
Description
Technical field:
The utility model relates to a kind of modified model mechanical seal, specifically is a kind of be applicable to pump in water, oil and the general weak erosive chemical medium and modified model mechanical seal on the machinery.
Background technique:
At present, prior art has a kind of mechanical seal, and as shown in Figure 2, it comprises static components and moving ring assembly; The stationary seat 2 that described static components comprises stationary ring 3 and is enclosed within stationary ring 3 outsides; Described moving ring assembly comprises rotating ring 13, rubber corrugated pipe 14, rotating seat 5, spring 12 and spring seat 8; The left end of described rubber corrugated pipe 14 is provided with endoporus step 17, its right part and axle 10 interference fit; Described rotating ring 13 right side close-fittings are in endoporus step 17, and its left side and stationary ring 3 right sides are card tightly; Be respectively equipped with step I 15 and step II 16 on the external peripheral surface of described rubber corrugated pipe 14 left parts and right part; Described rotating seat 5 and step I 15 interference fit; Described spring seat 8 and step II 16 interference fit; Described spring 12 two ends withstand between rotating seat 5 and the spring seat 8.
There is a defective in actual applications in the mechanical seal of said structure: because described rotating ring right side is that close-fitting is in the endoporus step of rubber corrugated pipe, and the right-hand member of rubber corrugated pipe and axle interference fit, therefore, required rotating force passes to it by rubber corrugated pipe during rotating ring work, in other words, described rubber corrugated pipe has the effect of transmitting rotating force to rotating ring, yet, because needed rotating force is often all bigger during rotating ring work, therefore, rubber corrugated pipe ftractures causing easily because of tired under the distortion repeatedly for a long time, and the phenomenon that twisted off also can take place when serious, thereby has shortened the working life of mechanical seal greatly.
In addition, rubber corrugated pipe in the above-mentioned mechanical seal not only will drive rotating ring and rotate together, but also under the effect of spring, promote rotating ring and stationary ring is fitted all the time, yet, because described rubber corrugated pipe is asymmetric, therefore, both ends of the spring is different to the active force of rotating seat and spring seat, thereby can not guarantee being close to of rotating ring and rubber corrugated pipe well, influence the motive sealing effect of rotating ring and stationary ring.
The model utility content:
The technical problems to be solved in the utility model is, provides a kind of and can not twist off phenomenon, thus the modified model mechanical seal that increases the service life.
Technical solution of the present utility model is, a kind of modified model mechanical seal with following structure is provided, and it comprises static components and moving ring assembly; Described moving ring assembly comprises rotating ring, rotating seat, spring seat, spring, fastening ring, rigidity drive sleeve and elastic support; The two ends of described spring withstand between rotating seat and the spring seat; The afterbody endoporus of described rigidity drive sleeve and fastening ring interference fit, described fastening ring and axle interference fit; The external peripheral surface of described rigidity drive sleeve head is provided with lug, and the inner circumferential surface of described rotating ring is provided with the axial notch that cooperates with lug; All there is an annular boss at the two ends, the left and right sides of described elastic support; Described rotating seat and spring seat are close to the annular boss at two ends, the elastic support left and right sides respectively; The annular boss of the step end face of described rotating ring and elastic support left end is close to; The annular boss of described rigidity drive sleeve afterbody step end face and elastic support right-hand member is close to.
After adopting above structure, compared with prior art, the utlity model has following advantage: adopt rubber corrugated pipe different to rotating ring transmission rotating force with prior art, the utility model is transmitted rotating force to rotating ring by the rigidity drive sleeve, because described drive sleeve is a rigidity, therefore it can not twist off phenomenon as rubber corrugated pipe when transmitting rotating force, thereby has prolonged working life of the present utility model.
As a kind of improvement of the present utility model, the annular boss of described elastic support left end and right-hand member can be symmetrical; The vertical cross-section at described elastic support middle part can comprise " V " shape upper section and fall " V " shape lower section; Described " V " shape upper section is with " V " shape lower section also can be symmetrical.Symmetrical annular boss and symmetrical " V " shape upper section and " V " shape lower section that falls can guarantee rotating seat and spring seat stressed evenly, thereby guarantee being close to of rotating ring and elastic support preferably, the motive sealing effect of assurance rotating ring and stationary ring.
Description of drawings:
Fig. 1 is the structural representation of the utility model modified model mechanical seal.
Fig. 2 is the structural representation of prior art mechanical seal.
Stationary seat as shown in the figure, 1, the pump housing, 2,, 2.1, annular convex rib, 3, stationary ring, 4, axial notch, 5, rotating seat, 6, lug, 7, elastic support, 8, spring seat, 9, fastening ring, 10, axle, 11, rigidity drive sleeve, 12, spring, 13, rotating ring, 14, rubber corrugated pipe, 15, step I, 16, step II; 17, endoporus step, 18, annular boss, 19, " V " shape upper section, 20, " V " shape lower section.
Specific embodiment:
The utility model is described in further detail below in conjunction with the drawings and specific embodiments:
As shown in Figure 1, in this specific embodiment, the mechanical seal of the utility model modified model comprises static components and moving ring assembly; Described static components specifically comprises stationary ring 3 and is enclosed within the stationary ring 3 outside stationary seats 2 that also pass through three annular convex ribs 2.1 and the pump housing 1 interference fit; Described moving ring assembly comprises rotating ring 13, rotating seat 5, spring seat 8, spring 12, fastening ring 9, rigidity drive sleeve 11 and elastic support 7; The afterbody endoporus of described rigidity drive sleeve 11 and fastening ring 9 interference fit, described fastening ring 9 and axle 10 interference fit; The external peripheral surface of described rigidity drive sleeve 11 heads is provided with lug 6, the inner circumferential surface of described rotating ring 13 is provided with the axial notch 4 that cooperates with lug 6, by the cooperation of lug 6 and axial notch 4, be rotated thereby make positive drive cover 11 can drive rotating ring 13.In this specific embodiment, all there is an annular boss 18 at the two ends, the left and right sides of described elastic support 7; Described rotating seat 5 is close to the annular boss 18 of elastic support 7 left ends, and described spring seat 8 is close to the annular boss 18 of elastic support 7 right-hand members; The annular boss 18 of the step end face of described rotating ring 13 and elastic support 7 left ends is close to; The annular boss 18 of the step end face of described rigidity drive sleeve 11 afterbodys and elastic support 7 right-hand members is close to; The two ends of described spring 12 withstand between rotating seat 5 and the spring seat 8; The annular boss 18 of described elastic support 7 left ends and right-hand member is symmetrical; The vertical cross-section at described elastic support 7 middle parts comprises " V " shape upper section 19 and falls " V " shape lower section 20; Described " V " shape upper section 19 and " V " shape lower section 20 that falls are symmetrical.
Claims (2)
1, a kind of modified model mechanical seal, it comprises static components and moving ring assembly; Described moving ring assembly comprises rotating ring (13), rotating seat (5), spring seat (8), spring (12) and fastening ring (9); The two ends of described spring (12) withstand between rotating seat (5) and the spring seat (8), it is characterized in that: it also comprises rigidity drive sleeve (11) and elastic support (7); The afterbody endoporus of described rigidity drive sleeve (11) and fastening ring (9) interference fit, described fastening ring (9) and axle (10) interference fit; The external peripheral surface of described rigidity drive sleeve (11) head is provided with lug (6), and the inner circumferential surface of described rotating ring (13) is provided with the axial notch (4) that cooperates with lug (6); All there is an annular boss (18) at the two ends, the left and right sides of described elastic support (7); Described rotating seat (5) and spring seat (8) are close to the annular boss (18) at elastic support (7) two ends, the left and right sides respectively; The annular boss (18) of the step end face of described rotating ring (13) and elastic support (7) left end is close to; The annular boss (18) of described rigidity drive sleeve (11) afterbody step end face and elastic support (7) right-hand member is close to.
2, modified model mechanical seal according to claim 1 is characterized in that: the annular boss (18) of described elastic support (7) left end and right-hand member is symmetrical; The vertical cross-section at described elastic support (7) middle part comprises " V " shape upper section (19) and falls " V " shape lower section (20); Described " V " the shape upper section (19) and " V " shape lower section (20) that falls are symmetrical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009201460897U CN201368198Y (en) | 2009-03-24 | 2009-03-24 | Improved mechanical seal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009201460897U CN201368198Y (en) | 2009-03-24 | 2009-03-24 | Improved mechanical seal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201368198Y true CN201368198Y (en) | 2009-12-23 |
Family
ID=41487091
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2009201460897U Expired - Fee Related CN201368198Y (en) | 2009-03-24 | 2009-03-24 | Improved mechanical seal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201368198Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108857276A (en) * | 2018-06-28 | 2018-11-23 | 安徽恒均粉末冶金科技股份有限公司 | Drive sleeve and its manufacturing method |
-
2009
- 2009-03-24 CN CNU2009201460897U patent/CN201368198Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108857276A (en) * | 2018-06-28 | 2018-11-23 | 安徽恒均粉末冶金科技股份有限公司 | Drive sleeve and its manufacturing method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091223 Termination date: 20140324 |
|
| DD01 | Delivery of document by public notice |
Addressee: Lou Hubin Document name: Notification of Termination of Patent Right |