CN201560977U - Wearproof orifice set used for water pump - Google Patents
Wearproof orifice set used for water pump Download PDFInfo
- Publication number
- CN201560977U CN201560977U CN2009202134452U CN200920213445U CN201560977U CN 201560977 U CN201560977 U CN 201560977U CN 2009202134452 U CN2009202134452 U CN 2009202134452U CN 200920213445 U CN200920213445 U CN 200920213445U CN 201560977 U CN201560977 U CN 201560977U
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- CN
- China
- Prior art keywords
- wear
- orifice
- water pump
- orifice sleeve
- wearproof
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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 wearproof throttling gear used for water pump, which includes an orifice sleeve, and an orifice liner; the orifice liner is sleeved on a pump shaft; the orifice sleeve can be rotatably sleeved on the orifice liner; the wearproof throttling gear used for water pump is characterized in that the inside of the front end of the orifice sleeve is provided with a section of wearproof liner layer. The wearproof throttling gear used for water pump greatly reduces the abrasion of the orifice sleeve, completely solves the abrasion problems of the orifice liner and the orifice sleeve through actual running experiments; moreover, the wearproof throttling gear used for water pump can be broadly applied into a plurality of NLT type condensate pumps.
Description
Technical field
The utility model relates to the pump technology field, concrete relates to a kind of wear-resisting throttling arrangement that is used on the water pump.
Background technique
In existing large-scale condensate pump, operated by rotary motion has orifice sleeve on an end pump shaft of impeller, and orifice sleeve inside also is provided with nockbush.Mainly acting as of orifice sleeve and nockbush: when pump when running up, can produce very high fluid pumping pressure head, this pressure directly flows to seal arrangement (float ring seal, packing seal and mechanical seal), and this will propose very high bearing requirements to seal arrangement.After having adorned orifice sleeve, it is poor to have cut the labyrinth at the orifice sleeve inwall, between orifice sleeve and the nockbush certain interval is arranged, and hydrodynamic pressure is mobile in gap and labyrinth are poor, plays decompression.Pump is when starting, and the pressure that hangs down current because of rotating speed is also low, water-free lubrication in orifice sleeve and the nockbush gap, with generation dry grinding in short-term in actual use, very easy wearing and tearing between orifice sleeve and the nockbush often less than a proof cycle, are promptly found wearing and tearing.
The model utility content
Technical problem to be solved in the utility model is, overcomes problems of the prior art, and a kind of wear-resisting throttling arrangement that is used on the water pump is provided.
In order to address the above problem the technical solution of the utility model is such:
The wear-resisting throttling arrangement of a kind of water pump comprises orifice sleeve, nockbush, and nockbush is placed on the pump shaft, and orifice sleeve is rotatable to be enclosed within on the nockbush, it is characterized in that, the front end inboard of orifice sleeve is provided with one section wear-resistant liner layer.
For interference is press-fitted, so that wear-resistant liner has enough tension forces, orifice sleeve is pressed H7 required precision processing between described wear-resistant liner layer and the orifice sleeve, and magnitude of interference increases with the increase of its external diameter.
The thickness of wear-resistant liner layer is monolateral 5mm.
The width of wear-resistant liner layer is 25mm.
It is spheroidal graphite cast iron that orifice sleeve adopts this material of QT500-7, be applicable to the common and low-alloy spheroidal graphite cast-iron spare of the casting in the suitable casting mold of sand mold or thermal conductivity and sand mold, better tensile strength and plastic deformation rate are arranged, can meet design requirement, manufacture cost is low again.
And the wear-resistant liner layer adopts the AC-3 material, and the AC-3 material adopts mixed fibre, solid lubricant, and antiwear additive and modified resin etc. are at the wear-resisting type composite material of specific intensity and forming under the pressure.Its characteristic is as follows:
1. specific strength height, Young's modulus is low, have good in plasticity, break-in easily.
2. temperature tolerance is good, but 170 ℃ of uses down of what, and short-term job temperature in emergency circumstances can reach 250 ℃.
3. dimensionally stable, thermal expansion coefficient and rising property of water are little, and dimensional stability is good in water and mineral oil, resistance to chemical attack.
4. wear resistance good (dry friction).
Beneficial effect, wear-resisting throttling arrangement described in the utility model, under the situation that orifice sleeve wherein remains unchanged in structure, material, gap, / 3rd places in the top are provided with the wear-resistant liner layer, the wearing and tearing of orifice sleeve have been reduced greatly, through the actual motion test, solved nockbush and orifice sleeve wear problem fully, and can be applied in the condensate pump of multiple NLT model.
Description of drawings
Describe the utility model in detail below in conjunction with the drawings and specific embodiments;
Fig. 1 is the structural representation of a kind of water pump described in the utility model with wear-resisting throttling arrangement.
Embodiment
For technological means, creation characteristic that the utility model is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.
Referring to Fig. 1
The wear-resisting throttling arrangement of a kind of water pump comprises orifice sleeve 1, nockbush 2, and nockbush 2 is placed on the pump shaft 3, orifice sleeve 1 rotatable being enclosed within on the nockbush 2, and the front end inboard of orifice sleeve 1 is provided with one section wear-resistant liner layer 11.The outside of orifice sleeve is 4 of mechanical sealing parts and water outlet housing 5.
The material of nockbush 2 is 1Cr17Ni2, and nockbush 2 is fixed on the pump shaft 3.Gap between nockbush 2 and the orifice sleeve 1 is 0.14～0.22mm.
Be designed to interference between described wear-resistant liner layer external diameter and the orifice sleeve endoporus and be press-fitted, so that wear-resistant liner has enough tension forces, orifice sleeve is pressed H7 required precision processing, and magnitude of interference increases with the increase of its external diameter.
The thickness of described wear-resistant liner layer is monolateral 5mm.
The width of described wear-resistant liner layer is 25mm.
It is spheroidal graphite cast iron that orifice sleeve adopts this material of QT500-7, be applicable to the common and low-alloy spheroidal graphite cast-iron spare of the casting in the suitable casting mold of sand mold or thermal conductivity and sand mold, better tensile strength and plastic deformation rate are arranged, can meet design requirement, manufacture cost is low again.
And the wear-resistant liner layer adopts the AC-3 material, and the AC-3 material adopts mixed fibre, solid lubricant, and antiwear additive and modified resin etc. are at the wear-resisting type composite material of specific intensity and forming under the pressure.Its characteristic is as follows:
1. specific strength height, Young's modulus is low, have good in plasticity, break-in easily.
2. temperature tolerance is good, but 170 ℃ of uses down of what, and short-term job temperature in emergency circumstances can reach 250 ℃.
3. dimensionally stable, thermal expansion coefficient and rising property of water are little, and dimensional stability is good in water and mineral oil, resistance to chemical attack.
4. wear resistance good (dry friction).
Beneficial effect, wear-resisting throttling arrangement described in the utility model, under the situation that orifice sleeve wherein remains unchanged in structure, material, gap, / 3rd places in the top are provided with the wear-resistant liner layer, the wearing and tearing of orifice sleeve have been reduced greatly, through the actual motion test, solved nockbush and orifice sleeve wear problem fully, and can be applied in the condensate pump of multiple NLT model.
More than show and described basic principle of the present utility model, major character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; that describes in the foregoing description and the specification just illustrates principle of the present utility model; the utility model also has various changes and modifications under the prerequisite that does not break away from the utility model spirit and scope, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (4)
1. the wear-resisting throttling arrangement of water pump comprises orifice sleeve, nockbush, and nockbush is placed on the pump shaft, and orifice sleeve is rotatable to be enclosed within on the nockbush, it is characterized in that, the front end inboard of orifice sleeve is provided with one section wear-resistant liner layer.
2. the wear-resisting throttling arrangement of a kind of water pump according to claim 1 is characterized in that, is press-fitted for interference between described wear-resistant liner layer and the orifice sleeve.
3. the wear-resisting throttling arrangement of a kind of water pump according to claim 1 is characterized in that the thickness of described wear-resistant liner layer is monolateral 5mm.
4. the wear-resisting throttling arrangement of a kind of water pump according to claim 1 is characterized in that the width of described wear-resistant liner layer is 25mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202134452U CN201560977U (en) | 2009-12-21 | 2009-12-21 | Wearproof orifice set used for water pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202134452U CN201560977U (en) | 2009-12-21 | 2009-12-21 | Wearproof orifice set used for water pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201560977U true CN201560977U (en) | 2010-08-25 |
Family
ID=42626123
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202134452U Expired - Lifetime CN201560977U (en) | 2009-12-21 | 2009-12-21 | Wearproof orifice set used for water pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201560977U (en) |
-
2009
- 2009-12-21 CN CN2009202134452U patent/CN201560977U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100825 |
|
| CX01 | Expiry of patent term |