CN2924097Y - Mechanical seal for sand-slurry pump - Google Patents
Mechanical seal for sand-slurry pump Download PDFInfo
- Publication number
- CN2924097Y CN2924097Y CN 200520076530 CN200520076530U CN2924097Y CN 2924097 Y CN2924097 Y CN 2924097Y CN 200520076530 CN200520076530 CN 200520076530 CN 200520076530 U CN200520076530 U CN 200520076530U CN 2924097 Y CN2924097 Y CN 2924097Y
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- Prior art keywords
- sealing
- stationary ring
- ring
- stationary
- seal
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- Expired - Fee Related
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Abstract
The utility model relates to an improvement to the sealing of the mortar pump machinery, in particular to machinery with a long service life, which is not easy to block the sand, and has a good sealing performance. The utility model is characterized in that a lip-type sealing is arranged between the sealing static ring and a static ring seat (sleeve). The utility model not only keeps the original sealing performance and function, but also largely improves the reliability of the sealing, effectively overcomes the shortage of the original O-typed ring sealing, ensures the sealing performance, largely prolongs the service life of the sealing, especially effectively prevents the mortars or sands in the pump chamber from blocking or depositing into the gap between the static ring and the static ring seat (sleeve), caused the blocking of the static ring, and invalidity of the shaft sealing.
Description
Technical field
Model utility is about the improvement to mortar pump mechanical seal, and especially long service life is difficult for card sand, the mechanical seal of good seal performance.
Background technique
Internally mounted mechanical seal is generally adopted in the anti-particle mechanical seal of centrifugal pump, as described in Chinese patent 02257939.7, forms (Fig. 1) by rotating ring, stationary ring, spring, seal closure.For making the stationary ring can be axially elastic flexibly, between its stationary ring 2 and the stationary seat 4, generally all adopt O shape circle 3 to seal.Reach and to prevent no leakage between stationary ring and the stationary seat, can guarantee stationary ring again under spring push, flexibly axial stretching compensation sealing end force.
Yet owing to have the slit between stationary ring and the stationary seat, when conveying contained the particle mortar, sand grains entered both slits easily and blocks stationary ring, and stationary ring can not be moved forward and backward freely, impacting force between the dynamic and static like this ring just can not get compensation, regulates, and sealing is with ineffective.Secondly, the cooperation elasticity of O shape circle 3 in the slit is difficult to support holds, as cooperates pine, and pump chamber liquid can pass through the outside leakage in this slit; Cooperate tension, easy again stuck stationary ring causes seal failure.If the increase spring thrust though can solve sealing tension stationary ring jacking force deficiency, often can cause again that impacting force is excessive between the dynamic and static ring, cause dynamic and static interannular wearing and tearing aggravation, shorten sealing working life.Besides, seal with O ring, elasticity (plasticity) surplus is little, and especially O shape rubber ring is heated, ageing hardening, is subjected to chemical substance etch swelling, and all the utmost point can cause stuck stationary ring easily, or because of aging contraction of O shape circle causes leakage, the integral sealing reliability is reduced.
Summary of the invention
The purpose of model utility is to overcome the deficiency of above-mentioned prior art, provides a kind of and can prevent slit card sand, seals long service life, can guarantee the mortar mechanical seal for pump of sealability.
The model utility purpose realizes that main the improvement is to change O shape sealing between stationary ring and stationary seat, is lip seal, thereby overcomes above-mentioned the deficiencies in the prior art, realizes the object of the invention.Specifically, model utility mortar mechanical seal for pump comprises rotating ring and stationary ring that end face cooperates, and the stationary seat in the stationary ring outside, and pushing tow stationary ring nose balance elastic component is characterized in that between said stationary ring and stationary seat lip seal being arranged.
For further improving sealing effect, a kind of better is that the lip of lip seal is provided with dorsad, towards inner lip, main rising prevents that pump chamber internal pressure liquid is to external leakage, towards outer lip, when preventing in the excessive or pump chamber of external refrigeration hydraulic coupling negative pressure state, cooling liquid or air enter in the pump chamber.In addition, towards inner lip, can also prevent better that the pump chamber sand grains from snapping between stationary ring and stationary seat.The said mouth of lips dorsad can be that list only has the lips mouth of lip structure dorsad, also can be to install dorsad with two single lips.
In addition,, guarantee that the seal face specific pressure is in former set condition all the time, promote the elastic component of stationary ring, better adopt elastic caoutchouc cydariform tube to replace for preventing that stationary ring from promoting the spring corrosion and changing original elastic force.
Model utility is because with the seal with O ring between stationary ring in the mechanical seal and stationary seat, change the employing lip seal into, not only still keep original sealability, effect, and sealing reliability improves greatly, effectively overcome the deficiency of former seal with O ring, guarantee sealability, prolonged sealing working life greatly.Especially can prevent effectively that interior slurry of pump chamber or sand grains from snapping in or being deposited in stationary ring and the stationary seat slit, cause that stationary ring is stuck, shaft sealing was lost efficacy.
Below in conjunction with two embodiments, further specify model utility.
Description of drawings
Fig. 1 is the prior art structural representation.
Fig. 2 is the first example structure schematic representation.
Fig. 3 is the second example structure schematic representation.
Fig. 4 is the 3rd example structure schematic representation.
Embodiment
Embodiment 1: referring to Fig. 2, model utility mortar mechanical seal for pump comprises the rotating ring 1 that is fixed in the rotating shaft, the stationary ring 2 that is the end face rotary seal with it, stationary ring is arranged in the stationary ring cover 4, and axially by holddown spring 5, the lip seal 6 that stationary ring and stationary ring inner room are installed dorsad by two lips is formed.
Embodiment 2: referring to Fig. 3, as embodiment 1, stationary ring and stationary ring inner room are one and have the lip seal 7 of lips mouth dorsad.
Embodiment 3: referring to Fig. 4, as described above, corroded and produce jacking force and descend for overcoming spring, and guarantee that two seal faces have suitable impacting force, the stationary ring axial compression is an elastic caoutchouc cydariform tube 8, and it radially has cooling through hole 9.
Said stationary seat of model utility and stationary ring cover are synonym.
Claims (3)
1, mortar mechanical seal for pump comprises rotating ring and stationary ring that end face cooperates, and the stationary seat in the stationary ring outside, and pushing tow stationary ring nose balance elastic component is characterized in that between said stationary ring and stationary seat lip seal being arranged.
2,, it is characterized in that said lip seal lip is provided with dorsad according to the described mortar mechanical seal for pump of claim 1.
3,, it is characterized in that said pushing tow stationary ring nose balance elastic component is the cydariform rubber ring according to claim 1 or 2 described mortar mechanical seal for pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520076530 CN2924097Y (en) | 2005-10-17 | 2005-10-17 | Mechanical seal for sand-slurry pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520076530 CN2924097Y (en) | 2005-10-17 | 2005-10-17 | Mechanical seal for sand-slurry pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2924097Y true CN2924097Y (en) | 2007-07-18 |
Family
ID=38260528
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520076530 Expired - Fee Related CN2924097Y (en) | 2005-10-17 | 2005-10-17 | Mechanical seal for sand-slurry pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2924097Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102734151A (en) * | 2012-07-06 | 2012-10-17 | 白银鸿浩化工机械制造有限公司 | Non-contact seal of pulp pump |
| CN103075347A (en) * | 2013-01-19 | 2013-05-01 | 上海零澜机械科技有限公司 | Gap self-adaptive mixed type dual-sealing structure for roots pump drive end |
| CN103562555A (en) * | 2011-01-18 | 2014-02-05 | Emb有限公司 | Centrifugal electric pump for suction of aeriform fluids with liquids anti-infiltration device |
-
2005
- 2005-10-17 CN CN 200520076530 patent/CN2924097Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103562555A (en) * | 2011-01-18 | 2014-02-05 | Emb有限公司 | Centrifugal electric pump for suction of aeriform fluids with liquids anti-infiltration device |
| CN102734151A (en) * | 2012-07-06 | 2012-10-17 | 白银鸿浩化工机械制造有限公司 | Non-contact seal of pulp pump |
| CN103075347A (en) * | 2013-01-19 | 2013-05-01 | 上海零澜机械科技有限公司 | Gap self-adaptive mixed type dual-sealing structure for roots pump drive end |
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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 | ||
| 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 |