CN202971516U - Locking anti-loose structure for reverse threaded nut - Google Patents
Locking anti-loose structure for reverse threaded nut Download PDFInfo
- Publication number
- CN202971516U CN202971516U CN 201220649506 CN201220649506U CN202971516U CN 202971516 U CN202971516 U CN 202971516U CN 201220649506 CN201220649506 CN 201220649506 CN 201220649506 U CN201220649506 U CN 201220649506U CN 202971516 U CN202971516 U CN 202971516U
- Authority
- CN
- China
- Prior art keywords
- nut
- reverse threaded
- threaded nut
- loose structure
- silk
- 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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Abstract
The utility model relates to a locking anti-loose structure for a reverse threaded nut. One end of the reverse threaded nut is provided with symmetrical rebates; an axle end reverse threaded screw is provided with through holes corresponding to the positions of the rebates of the reverse threaded nut; and an open pin passes through the rebates of the reverse threaded nut to be inserted into the through holes. According to the anti-loose structure disclosed by the utility model, no matter a working pump rotates forwards or reversely, the reverse threaded nut is only applied with a smaller axial force. According to the anti-loose structure of which the open pins are matched with the reverse threaded nut, the nut of the working pump can be effectively prevented from falling down.
Description
Technical field
The utility model relates to the nut lock locking structure, particularly a kind of reverse silk mouth nut locking anti-loose structure.
Background technique
Existing water pump, mouthful design of the anti-silk of a lot of employings of operation of oil pump axle axle head.When pump work, impeller is rotated in the forward, and this moment, anti-silk mouthful nut was revolved tighter and tighter under the effect of conveying fluid, had played well locking effect.But in working practice, some situation impeller can reverse.For example, boiler condensation pump inducer axle head is mouthful design of anti-silk, screws with an anti-silk mouthful nut.There are two kinds of situations to cause the condensate extractionpump counter-rotating in working practice; first: condensate extractionpump is the supplementary equipment of steam turbine; supporting two to three condensate extractionpumps of steam turbine; it is relation in parallel between several pumps; after condensate extractionpump of operation requirements started steadily, another ability was shut down, and the condensate extractionpump that just shut down this moment is reversed by fluid driven; especially when condensate extractionpump outlet closed check valve was not tight, condensate extractionpump can continue counter-rotating.Second: when condensate extractionpump is changed motor, the crawl preliminary operation to, condensate extractionpump may reverse, though shorter speed of time very high (condensate extractionpump rotating speed 2950r/min).Under these two kinds of Reversions, anti-silk mouthful nut is unscrewed under the fluid effect to come off.
The model utility content
Technical problem to be solved in the utility model is, a kind of reverse silk mouth nut locking anti-loose structure is provided, and prevents from that anti-silk mouthful nut from being unscrewed under the fluid effect to come off.
For effectively addressing the above problem, the technical solution adopted in the utility model is: a kind of reverse silk mouth nut locking anti-loose structure, it is characterized in that, one end of anti-silk mouthful nut is provided with symmetrical notch, the anti-silk mouthful screw rod of axle head is provided with and the anti-silk mouthful through hole that the nut notch position is corresponding, and cotter pin is passed an anti-silk mouthful nut notch and inserted in through hole.
The beneficial effects of the utility model are, no matter working pump forward counter-rotating, and an anti-silk mouthful nut only is subjected to less axial force, and the anti-loose structure that anti-silk mouthful nut coordinates with cotter pin can prevent effectively that the anti-mouth nut from coming off.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is that the A of Fig. 1 is to structural representation.
In figure: the anti-silk mouthful screw rod of 1-axle head, the anti-silk mouthful nut of 2-, 3-cotter pin.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing, referring to Fig. 1 and Fig. 2, a kind of reverse silk mouth nut locking anti-loose structure, it is characterized in that, one end of anti-silk mouthful nut 2 is provided with symmetrical notch, the anti-silk mouthful screw rod 1 of axle head is provided with and the anti-silk mouthful through hole that nut 2 notch positions are corresponding, and cotter pin 3 is passed anti-silk mouthful nut 2 notches and inserted in through hole.
One end of anti-silk mouthful nut 2 is processed into six symmetrical grooves, impeller and inducer install on the empty axle that is provided with the anti-silk mouthful screw rod 1 of axle head, again the anti-silk mouthful nut 2 of six grooves is tightened, on corresponding slotting position, the anti-silk mouthful screw rod 1 of axle head is drilled with through hole, anti-silk mouthful nut 2 notches are passed in cotter pin 3 to be inserted in through hole, bypass 3 liang of pin pin of cotter pin, locking reverse silk mouth nut 2 gets final product.So no matter working pump forward counter-rotating, cotter pin can block anti-silk mouthful nut, prevent that effectively the anti-silk mouthful nut from coming off.
Claims (1)
1. a reverse silk mouth nut is locked anti-loose structure, it is characterized in that, one end of anti-silk mouthful nut is provided with symmetrical notch, and the anti-silk mouthful screw rod of axle head is provided with and the anti-silk mouthful through hole that the nut notch position is corresponding, and cotter pin is passed an anti-silk mouthful nut notch and inserted in through hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220649506 CN202971516U (en) | 2012-12-01 | 2012-12-01 | Locking anti-loose structure for reverse threaded nut |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220649506 CN202971516U (en) | 2012-12-01 | 2012-12-01 | Locking anti-loose structure for reverse threaded nut |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202971516U true CN202971516U (en) | 2013-06-05 |
Family
ID=48512599
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220649506 Expired - Fee Related CN202971516U (en) | 2012-12-01 | 2012-12-01 | Locking anti-loose structure for reverse threaded nut |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202971516U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103820307A (en) * | 2014-02-24 | 2014-05-28 | 南京工业大学 | Novel mechanical stirring impeller micro-membrane aerated bioreactor |
-
2012
- 2012-12-01 CN CN 201220649506 patent/CN202971516U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103820307A (en) * | 2014-02-24 | 2014-05-28 | 南京工业大学 | Novel mechanical stirring impeller micro-membrane aerated bioreactor |
| CN103820307B (en) * | 2014-02-24 | 2016-01-20 | 南京工业大学 | The micro-membrane aerated bioreactor of a kind of novel mechanical paddle wheel |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130605 Termination date: 20151201 |
|
| EXPY | Termination of patent right or utility model |