CN102788015A - Automatic adjusting device of screw pair of single-screw pump - Google Patents
Automatic adjusting device of screw pair of single-screw pump Download PDFInfo
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- CN102788015A CN102788015A CN2012103206990A CN201210320699A CN102788015A CN 102788015 A CN102788015 A CN 102788015A CN 2012103206990 A CN2012103206990 A CN 2012103206990A CN 201210320699 A CN201210320699 A CN 201210320699A CN 102788015 A CN102788015 A CN 102788015A
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- stator
- screw pair
- pressure
- screw
- stirrup
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Abstract
The invention relates to an automatic adjusting device of a screw pair of a single-screw pump. The automatic adjusting device comprises a stator 1, a stator steel hoop 2 and screws 3. The stator 1 is fixed into the stator steel hoop 2, and a pressure adjusting cavity extending along threaded helixes of the stator 1 and the stator steel hoop 2 is formed between the stator 1 and the stator steel hoop 2. The automatic adjusting device has the advantages that a gap of the screw pair can be adjusted automatically according to the pressure at an outlet end, pressure on the screw pair is increased, leakage is reduced, volumetric efficiency is enhanced, and 1.2MPa pressure can be generated by the one-level single screw pair.
Description
Technical field
the present invention relates to a kind of automatic control tegulatingdevice of helical rotor pump screw pair.
Background technique
screw rod and stator engagement generate potted line, and potted line constitutes Seal cage, holds medium.When screw rod is pressed the counterclockwise rotation of regulation, move to the Seal cage constancy of volume to the stator outlet end, medium transport is gone out.When the outlet end medium is obstructed, the pressure medium in the Seal cage will correspondingly improve.The Seal cage that potted line separates always the place ahead (outlet end) pressure greater than the rear to pressure.Therefore, have only the sub-fraction medium to squeeze to open potted line to be back to the rear, discharge pressure is reduced, quantity delivered reduces.This leakage is inevitably, the size that how much depends on seal clearance of capacity of reflux and the intensity of sealing, and the big capacity of reflux in gap is big, and pressure falls greatly.Sealing intensity is high, and potted line is not easy to be squeezed to open expansion, and pressure falls and can reduce, and capacity of reflux also can reduce, and volumetric efficiency will be higher.
How
reduce seal clearance, carry sealing intensity, and this is the problem that the helical rotor pump industry is paid close attention to always.The screw pair of helical rotor pump has following several kinds of situation at present:
The screw pair that
, rigidity stator and rigid threaded rod constitute.This list screw pair does not solve the seal clearance problem, because rigidity stator and rigid threaded rod all are rigidity, guarantee rigid threaded rod running successfully in rigidity stator an actor's rendering of an operatic tune; Therefore just leave bigger seal clearance; This just makes its pressure fall greatly, leaks greatly, and pressure is low; Volumetric efficiency is low, even can not carry low viscous medium.
Single screw pair that
two, elastomer stator and rigid threaded rod constitute.Because the stator rubber layer thickness is inhomogeneous, under the effect of pressure medium, the place from the rubber bed thickness struts potted line easily, and its pressure is fallen greatly, leaks greatly, and volumetric efficiency is low, 1 grade of pressure that should the list screw pair only can produce 0.6MPa.
in addition, helical rotor pump in use for some time, the gap between its screw rod and the stator can because of its mutually mutual friction strengthen, cause capacity of reflux to increase, increase falls in pressure, thereby causes volumetric efficiency to reduce.The technology of head it off is manually and regulates at present, and the size of its regulated quantity and the time of regulating are grasped and all can not reach desirable effect,
Summary of the invention
the objective of the invention is to the deficiency to above-mentioned existing technology, and a kind of screw pair is provided, and leak with the pressure and volumetric efficiency, the minimizing that improve screw pair, can carry the low viscosity medium.
the present invention includes stator 1, stator stirrup 2, screw rod 3.Stator 1 is fixed in the stator stirrup 2, has formed the pressure regulating cavity that revolves line along its screw thread between stator 1 and the stator stirrup 2.This screw pair is in when work, and the medium of entry end is through the screw pair laggard inlet/outlet end that pressurizes, and the medium of outlet end can get into pressure regulating cavity under the effect of pressure, and this pressure regulating cavity communicates with outlet end is unidirectional.
at this moment; Be full of pressure medium in the pressure regulating cavity, stator 1 can wrap up screw rod 3 tighter, makes stator 1 cooperate closelyr with potted line between the screw rod 3; Thereby medium can't be refluxed, therefore greatly improved the volumetric efficiency of screw pair.
technique effect of the present invention is: according to the pressure height of outlet end; Automatically the pressure of screw pair has been improved in the secondary gap of adjusting screw rod, reduces and leaks; Improved volumetric efficiency, the single screw pair of such one-level can produce the pressure of 1.2Mpa.
Description of drawings:
Fig. 1 is the A-A sectional view among Fig. 2,
Fig. 2 is the main sectional view of stator 1 such as grade with the screw pair of stator stirrup 2, screw rod 3 formations,
In Fig. 1, Fig. 2:
1, stator 2, stator stirrup 3, screw rod
Embodiment
this screw pair comprises stator 1, stator stirrup 2, screw rod 3.Stator 1 is formed by rubber processing; Stator stirrup 2 is processed by seamless steel pipe; Screw rod 3 is processed by 45 steel.Stator 1 is for waiting twin-feed spiral stator of wall thickness; Its wall thickness is 5mm.Stator 1 is fixed in the stator stirrup 2.
all the other technical characteristicss are identical with technological scheme.
this screw pair comprises stator 1, stator stirrup 2, screw rod 3.Stator 1 is formed by rubber processing; Stator stirrup 2 is processed by seamless steel pipe; Screw rod 3 is processed by 2Cr3.Stator 1 is for waiting three helical stators of wall thickness; Its wall thickness is 10mm.Stator 1 is fixed in the stator stirrup 2.
all the other technical characteristicss are identical with technological scheme.
this screw pair comprises stator 1, stator stirrup 2, screw rod 3.Stator 1 is formed by rubber processing; Stator stirrup 2 is processed by seamless steel pipe; Screw rod 3 is processed by 304 stainless steels.Stator 1 is for waiting three helical stators of wall thickness; Its wall thickness is 20mm.Stator 1 is fixed in the stator stirrup 2.
all the other technical characteristicss are identical with technological scheme.
Claims (3)
1. screw pair, this screw pair comprises stator 1, stator stirrup 2, screw rod 3, it is characterized in that: stator 1 is processed by rubber-like nonmetallic material such as rubber; Stator stirrup 2 is processed by metallic material; Screw rod 3 is processed by metallic material.
2. screw pair according to claim 1 is characterized in that: stator 1 is the double end of wall thickness such as having or the stator of three spirals; Its wall thickness is 5mm to 20mm.
3. screw pair according to claim 1 is characterized in that: stator 1 is fixed in the stator stirrup 2; And because stator 1 is for waiting wall thickness, so be formed with 2 perhaps 3 pressure regulating cavities that revolve line along spiral between itself and the stator stirrup 2; This pressure regulating cavity communicates with outlet end is unidirectional.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103206990A CN102788015A (en) | 2012-09-18 | 2012-09-18 | Automatic adjusting device of screw pair of single-screw pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103206990A CN102788015A (en) | 2012-09-18 | 2012-09-18 | Automatic adjusting device of screw pair of single-screw pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102788015A true CN102788015A (en) | 2012-11-21 |
Family
ID=47153532
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012103206990A Pending CN102788015A (en) | 2012-09-18 | 2012-09-18 | Automatic adjusting device of screw pair of single-screw pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102788015A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103758756A (en) * | 2014-01-22 | 2014-04-30 | 中国石油天然气股份有限公司 | Balanced metal screw pump |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6336796B1 (en) * | 1999-06-07 | 2002-01-08 | Institut Francais Du Petrole | Progressive-cavity pump with composite stator and manufacturing process |
| CN2572055Y (en) * | 2002-09-19 | 2003-09-10 | 关勇 | Inflated single screw pump |
| CN2703148Y (en) * | 2004-04-22 | 2005-06-01 | 潘立明 | Conical single-screw pump |
| CN201121582Y (en) * | 2007-09-29 | 2008-09-24 | 天津泵业机械集团有限公司 | High-pressure large-flux single screw pump |
| CN201606244U (en) * | 2009-11-06 | 2010-10-13 | 大庆华谊金鹰石油科技有限公司 | Multi-cavity stator screw pump |
| CN201739169U (en) * | 2010-08-17 | 2011-02-09 | 黄应力 | Novel type single screw pump |
-
2012
- 2012-09-18 CN CN2012103206990A patent/CN102788015A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6336796B1 (en) * | 1999-06-07 | 2002-01-08 | Institut Francais Du Petrole | Progressive-cavity pump with composite stator and manufacturing process |
| CN2572055Y (en) * | 2002-09-19 | 2003-09-10 | 关勇 | Inflated single screw pump |
| CN2703148Y (en) * | 2004-04-22 | 2005-06-01 | 潘立明 | Conical single-screw pump |
| CN201121582Y (en) * | 2007-09-29 | 2008-09-24 | 天津泵业机械集团有限公司 | High-pressure large-flux single screw pump |
| CN201606244U (en) * | 2009-11-06 | 2010-10-13 | 大庆华谊金鹰石油科技有限公司 | Multi-cavity stator screw pump |
| CN201739169U (en) * | 2010-08-17 | 2011-02-09 | 黄应力 | Novel type single screw pump |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103758756A (en) * | 2014-01-22 | 2014-04-30 | 中国石油天然气股份有限公司 | Balanced metal screw pump |
| CN103758756B (en) * | 2014-01-22 | 2016-01-06 | 中国石油天然气股份有限公司 | Balanced type metal screw pump |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20121121 |