CN105317680A - Screw compressor exhaust end journal hole sealing mechanism - Google Patents
Screw compressor exhaust end journal hole sealing mechanism Download PDFInfo
- Publication number
- CN105317680A CN105317680A CN201410258338.7A CN201410258338A CN105317680A CN 105317680 A CN105317680 A CN 105317680A CN 201410258338 A CN201410258338 A CN 201410258338A CN 105317680 A CN105317680 A CN 105317680A
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- Prior art keywords
- seal ring
- journal
- sealing ring
- cylindrical surface
- rotor
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- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Abstract
The invention relates to a screw compressor exhaust end journal hole sealing mechanism which includes an exhaust end bearing base; a sealing ring mounting hole is formed in a journal section of the exhaust end bearing base; an engineering plastic sealing ring is installed in the sealing ring mounting hole so that the plastic sealing ring is matched with the journal of a rotor; an outer cylindrical surface and one end surface of the engineering plastic sealing ring are processed to form smooth surfaces so that the plastic sealing ring is matched with the bearing base to form positioning. The diameter of the outer cylindrical surface of the engineering plastic sealing ring is less than the diameter of the rotor. An inner cylindrical surface and the other end surface of the engineering plastic sealing ring are processed to form ring-shaped grooves. The ring-shaped groove at the end surface is formed by a plurality of adjacent lines with cross sections being semicircular-shaped from center to edge. The mechanism effectively solves a stuck problem due to accumulation of iron chips at the journal and also significantly reduces leakage in a fit clearance of the journal.
Description
Technical field
The present invention relates to a kind of helical-lobe compressor, particularly relate to the exhaust end journal hole sealing configuration of this helical-lobe compressor.
Background technique
As accompanying drawing 1, the exhaust end axle journal of helical-lobe compressor and the intrinsic matching gap of journal hole, inevitably make compressor high-pressure air can be leaked in bearing support, reveals and increase, affect bearing lubrication simultaneously.
For reducing to reveal, prior art is the matching gap by controlling axle journal and journal hole, as shown in Fig. 1, Fig. 2; Fig. 2 is the cooperation section enlarged view of the axle journal of rotor 20 under the configuration mode of prior art and the journal hole of bearing support 10, wherein: X represents exhaust end clearance, and Y represents journal hole matching gap.
But such structure makes axle journal section form gap long and little together, and the particles such as the iron filings formed in compressor operating usually can here accumulate blocking, finally cause compressor stuck; And due to the factor of thermal expansion, journal hole place needs to arrange one section of matching gap, makes leakage rate larger
Summary of the invention
The technical issues that need to address of the present invention there is provided a kind of helical-lobe compressor exhaust end journal hole sealing configuration, are intended to solve the above problems.
In order to solve the problems of the technologies described above, the present invention is achieved by the following technical solutions:
The present invention includes: discharge end bearings seat; One section of seal ring mounting hole is set in the axle journal section of described discharge end bearings seat; Installing engineering plastic seal ring in described seal ring mounting hole, by the journal engagement of plastic seal ring and rotor; External cylindrical surface and an end face of described engineering plastics seal ring are processed into smooth surface, to assemble with bearing support, form location; The external cylindrical surface diameter of described engineering plastics seal ring need be less than the paddy footpath of rotor; Inner cylindrical surface and an other end face of described engineering plastics seal ring are then processed into round groove; The lines that the groove of described end be semicircle by an adjacent cross section of circle circle centrally outwards arranges and forms.
Compared with prior art, the invention has the beneficial effects as follows: efficiently solve the iron filings accumulation of axle journal place and cause stuck situation, the leakage in journal engagement gap also obviously reduces.
Accompanying drawing explanation
Fig. 1 is helical-lobe compressor exhaust end journal hole sealed structural representation in prior art.
Fig. 2 is the enlarged view at Fig. 1 I place.
Fig. 3 is structural representation of the present invention.
Fig. 4 is A place enlarged view in Fig. 3.
Fig. 5 is seal ring schematic diagram in Fig. 3.
Fig. 6 is the left side schematic diagram of Fig. 5.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the present invention is described in further detail:
From Fig. 3-Fig. 6: the present invention includes: discharge end bearings seat 1; One section of seal ring mounting hole is set in the axle journal section of described discharge end bearings seat 1; Installing engineering plastic seal ring 2 in described seal ring mounting hole, by the journal engagement of plastic seal ring 2 with rotor 3; External cylindrical surface and an end face of described engineering plastics seal ring 2 are processed into smooth surface, to assemble with bearing support 1, form location; The external cylindrical surface diameter of described engineering plastics seal ring need be less than the paddy footpath of rotor; Inner cylindrical surface and an other end face of described engineering plastics seal ring 2 are then processed into round groove; The lines that the groove of described end be semicircle by an adjacent cross section of circle circle centrally outwards arranges and forms.
In figure: X1 represents exhaust end clearance, and Y1 represents journal hole matching gap.
As shown in Figure 4, be processed into smooth surface at the external cylindrical surface of engineering plastics seal ring and an end face so that and bearing support assembly relation, to form location; It should be noted that the external cylindrical surface diameter of engineering plastics seal ring need be less than the paddy footpath of rotor; And at inner cylindrical surface and an other end face, then be processed into round groove, the structural type of round groove is if Fig. 5 is (in figure: end face lines D, internal surface groove N), the lines that groove in end is semicircle by an adjacent cross section of circle circle centrally outwards arranges and forms, its effect is when seal ring contacts with rotor end-face, can increase sealing effect, and extruding the most advanced and sophisticated amount of deformation of the lines made can be dodged by the groove of lines.The end face of seal ring arranges seal convexity lines, lines and rotor end-face close contact.Because iron filings will enter between centers gap, have to pass through seal ring and rotor end-face contact gap, when having had seal ring lines and rotor end-face close contact, iron filings etc. just have more been difficult to enter between centers gap.
Because seal ring internal surface has darker groove, the similar labyrinth seal of its sealing principle.When there being oil gas (air-flow) to flow to the low-pressure cavity of bearing support from the hyperbaric chamber of pressing chamber.Oil gas is through crown (in Fig. 4: crown J, the roller seating space G) gap of groove, and oil gas manager throttling process, pressure and temperature declines, and speed increases.When oil gas enters cavity, the sudden enlargement of sectional area, make oil-gas formation whirlpool, speed drops to zero, and pressure does not change.Under the ordering about of pressure difference, downward one groove of gas stream.By whole seal ring, reach seal action.Because seal ring of the present invention employs engineering plastics, have very strong wear resistance, o-ring groove crown can axle journal gentle touchdown, makes o-ring groove backlash very little (leveling off to zero), makes this seal ring performance be better than traditional labyrinth seal.
When there being iron filings to clamp-on pivot clearance, seal ring crown can make appropriateness distortion, and iron filings can be passed through.When iron filings enter groove by between cog, because trench gap is comparatively large, iron filings can be concealed therein in right amount, and are not formed to pile up and form rigid extruding or friction to rotor.
In seal ring one end towards pressing chamber, in order to not affect exhaust end face seal, the paddy footpath being not more than screw rotor that the external diameter of seal ring will design.
By above improvement, iron filings (or other solid matter) are accumulated at the shaft shoulder situation causing rotor stuck and are effectively controlled, and sealing situation is also strengthened.
Claims (1)
1. a helical-lobe compressor exhaust end journal hole sealing configuration, comprising: discharge end bearings seat; It is characterized in that: be set to one section of seal ring mounting hole in the axle journal section of described discharge end bearings seat; Installing engineering plastic seal ring in described seal ring mounting hole, by the journal engagement of plastic seal ring and rotor; External cylindrical surface and an end face of described engineering plastics seal ring are processed into smooth surface, to assemble with bearing support, form location; The external cylindrical surface diameter of described engineering plastics seal ring need be less than the paddy footpath of rotor; Inner cylindrical surface and an other end face of described engineering plastics seal ring are then processed into round groove; The lines that the groove of described end be semicircle by an adjacent cross section of circle circle centrally outwards arranges and forms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410258338.7A CN105317680A (en) | 2014-06-11 | 2014-06-11 | Screw compressor exhaust end journal hole sealing mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410258338.7A CN105317680A (en) | 2014-06-11 | 2014-06-11 | Screw compressor exhaust end journal hole sealing mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105317680A true CN105317680A (en) | 2016-02-10 |
Family
ID=55245784
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410258338.7A Pending CN105317680A (en) | 2014-06-11 | 2014-06-11 | Screw compressor exhaust end journal hole sealing mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105317680A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3330852A1 (en) * | 1983-08-26 | 1985-03-14 | Claudius Peters Ag, 2000 Hamburg | Sealing arrangement on a worm screw pump |
| DE3609996A1 (en) * | 1986-03-25 | 1987-10-01 | Mahle Gmbh | Screw-type compressor |
| US6287100B1 (en) * | 1998-04-30 | 2001-09-11 | Ghh-Rand Schraubenkompressoren Gmbh | Sealing device on a shaft journal of a dry-running helical rotary compressor |
| CN1336986A (en) * | 1999-01-11 | 2002-02-20 | 纳幕尔杜邦公司 | Screw compressor |
| US20040056423A1 (en) * | 2000-11-09 | 2004-03-25 | Staljanssens Erik Collette Dominique A. | Rotor shaft sealing |
| US20040170512A1 (en) * | 2003-02-28 | 2004-09-02 | Donald Yannascoli | Compressor |
| CN101592151A (en) * | 2008-05-27 | 2009-12-02 | 株式会社神户制钢所 | Screw fluid machine |
| CN202545253U (en) * | 2012-03-26 | 2012-11-21 | 奉化市釜用密封件有限公司 | Floating combined sealing structure of vehicle-mounted dry type screw compressor |
| CN103603803A (en) * | 2013-12-09 | 2014-02-26 | 济南海屹流体技术有限公司 | Water vapor screw compressor shaft seal structure |
| CN204283890U (en) * | 2014-06-11 | 2015-04-22 | 上海汉钟精机股份有限公司 | Helical-lobe compressor exhaust end journal hole sealing configuration |
-
2014
- 2014-06-11 CN CN201410258338.7A patent/CN105317680A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3330852A1 (en) * | 1983-08-26 | 1985-03-14 | Claudius Peters Ag, 2000 Hamburg | Sealing arrangement on a worm screw pump |
| DE3609996A1 (en) * | 1986-03-25 | 1987-10-01 | Mahle Gmbh | Screw-type compressor |
| US6287100B1 (en) * | 1998-04-30 | 2001-09-11 | Ghh-Rand Schraubenkompressoren Gmbh | Sealing device on a shaft journal of a dry-running helical rotary compressor |
| CN1336986A (en) * | 1999-01-11 | 2002-02-20 | 纳幕尔杜邦公司 | Screw compressor |
| US20040056423A1 (en) * | 2000-11-09 | 2004-03-25 | Staljanssens Erik Collette Dominique A. | Rotor shaft sealing |
| US20040170512A1 (en) * | 2003-02-28 | 2004-09-02 | Donald Yannascoli | Compressor |
| CN101592151A (en) * | 2008-05-27 | 2009-12-02 | 株式会社神户制钢所 | Screw fluid machine |
| CN202545253U (en) * | 2012-03-26 | 2012-11-21 | 奉化市釜用密封件有限公司 | Floating combined sealing structure of vehicle-mounted dry type screw compressor |
| CN103603803A (en) * | 2013-12-09 | 2014-02-26 | 济南海屹流体技术有限公司 | Water vapor screw compressor shaft seal structure |
| CN204283890U (en) * | 2014-06-11 | 2015-04-22 | 上海汉钟精机股份有限公司 | Helical-lobe compressor exhaust end journal hole sealing configuration |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160210 |
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| WD01 | Invention patent application deemed withdrawn after publication |