CN204283890U - Helical-lobe compressor exhaust end journal hole sealing configuration - Google Patents
Helical-lobe compressor exhaust end journal hole sealing configuration Download PDFInfo
- Publication number
- CN204283890U CN204283890U CN201420309869.XU CN201420309869U CN204283890U CN 204283890 U CN204283890 U CN 204283890U CN 201420309869 U CN201420309869 U CN 201420309869U CN 204283890 U CN204283890 U CN 204283890U
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- Prior art keywords
- seal ring
- journal
- cylindrical surface
- section
- engineering plastics
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- 238000007789 sealing Methods 0.000 title claims abstract description 9
- 229920006351 engineering plastic Polymers 0.000 claims abstract description 19
- 229920003023 plastic Polymers 0.000 claims abstract description 4
- 239000004033 plastic Substances 0.000 claims abstract description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 20
- 229910052742 iron Inorganic materials 0.000 abstract description 10
- 238000009825 accumulation Methods 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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- Sealing Devices (AREA)
Abstract
The utility model relates to a kind of helical-lobe compressor exhaust end journal hole sealing configuration, comprising: 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 diameter 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; The beneficial effects of the utility model are: efficiently solve the iron filings accumulation of axle journal place and cause stuck situation, the leakage in journal engagement gap also obviously reduces.
Description
Technical field
The utility model relates to a kind of helical-lobe compressor, particularly relates 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 utility model technical issues that need to address 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 utility model is achieved through the following technical solutions:
The utility model comprises: 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 diameter 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 beneficial effects of the utility model are: 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 the utility model structural representation.
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 utility model is described in further detail:
From Fig. 3-Fig. 6: the utility model comprises: 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 diameter 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 diameter 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 the utility model seal ring employs engineering plastics, there is 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 diameter 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 diameter 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 |
|---|---|---|---|
| CN201420309869.XU CN204283890U (en) | 2014-06-11 | 2014-06-11 | Helical-lobe compressor exhaust end journal hole sealing configuration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420309869.XU CN204283890U (en) | 2014-06-11 | 2014-06-11 | Helical-lobe compressor exhaust end journal hole sealing configuration |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204283890U true CN204283890U (en) | 2015-04-22 |
Family
ID=52867055
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420309869.XU Expired - Lifetime CN204283890U (en) | 2014-06-11 | 2014-06-11 | Helical-lobe compressor exhaust end journal hole sealing configuration |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204283890U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105317680A (en) * | 2014-06-11 | 2016-02-10 | 上海汉钟精机股份有限公司 | Screw compressor exhaust end journal hole sealing mechanism |
-
2014
- 2014-06-11 CN CN201420309869.XU patent/CN204283890U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105317680A (en) * | 2014-06-11 | 2016-02-10 | 上海汉钟精机股份有限公司 | Screw compressor exhaust end journal hole sealing mechanism |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20150422 |