CN105927542A - Rotor shaft seal structure for double-screw compressor - Google Patents
Rotor shaft seal structure for double-screw compressor Download PDFInfo
- Publication number
- CN105927542A CN105927542A CN201610438227.3A CN201610438227A CN105927542A CN 105927542 A CN105927542 A CN 105927542A CN 201610438227 A CN201610438227 A CN 201610438227A CN 105927542 A CN105927542 A CN 105927542A
- Authority
- CN
- China
- Prior art keywords
- rotor
- screw
- compressor
- seal structure
- shaft seal
- Prior art date
- 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.)
- Pending
Links
- 238000007789 sealing Methods 0.000 claims abstract description 29
- 239000007788 liquid Substances 0.000 claims abstract description 15
- 239000012530 fluid Substances 0.000 claims description 9
- 230000000694 effects Effects 0.000 abstract description 7
- 239000003921 oil Substances 0.000 description 15
- 238000004519 manufacturing process Methods 0.000 description 6
- 230000006835 compression Effects 0.000 description 5
- 238000007906 compression Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 239000010687 lubricating oil Substances 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 244000178924 Brassica napobrassica Species 0.000 description 1
- 235000011297 Brassica napobrassica Nutrition 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C27/00—Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids
- F04C27/005—Axial sealings for working fluid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/06—Silencing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2220/00—Application
- F04C2220/40—Pumps with means for venting areas other than the working chamber, e.g. bearings, gear chambers, shaft seals
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
The invention discloses a rotor shaft seal structure for a double-screw compressor. The rotor shaft seal structure comprises spiral grooves uniformly distributed in a shaft shoulder close to end-surface tooth forms of a rotor, wherein each spiral grooves forms an included angle with the axis of the rotor; the spiral direction of each groove is opposite to that of the tooth forms of the rotor; an opening direction of each groove forms a small included angle with the normal line of the shaft shoulder; and the opening direction of each groove is opposite to a rotating direction of the rotor. During working of the compressor, working surfaces in the spiral grooves throw away liquids in the spiral grooves, and moving directions of the sealing liquids thrown away are the same as spiral directions of teeth of the screw rotor and point to a working cavity. Because a supply pressure of the sealing liquids in the spiral grooves comes from exhaust gas of the screw compressor, and the energy of the sealing liquids thrown away under pushing of the working surfaces of the spiral grooves is greater than the pressure of a medium in the working cavity, thus the sealing liquids thrown away flow to the working cavity of the compressor to prevent leakage of the medium in the cavity. The rotor shaft seal structure disclosed by the invention has the prominent advantages of being good in sealing effect compared with other shaft seals, long in service life, and capable of increasing the working efficiency of the compressor.
Description
Technical field
The present invention relates to a kind of double-screw compressor rotor shaft seal structure, belong to sealing device technical field.
Background technology
Double-screw compressor is that Swede invented in 1934, and its initial purpose is the supercharging for diesel engine and gas turbine.
Before the sixties in 20th century, the development of helical-lobe compressor slowly, only has high speed, the screw rod pressure of oil-free in military equipment
Contracting machine is applied.Afterwards, oil spout technology is applied in helical-lobe compressor, reduces the requirement to screw rotor machining accuracy,
The noise of compressor, structure, rotating speed etc. are all created advantageous effect.At present, fuel injection helical lobe compressor is widely used in air
The field such as power, refrigeration air-conditioner, oil free screw compressor is widely used in oil, chemical industry, food, medicine and other fields.
In oil spout double-screw compressor, the axle with the rotor shaft part of compression chamber next-door neighbour seals, and particularly at exhaust end, this axle seals more
Important.In order to prevent the gas of compression chamber by rotor axial external leakage, it is necessary between working rotor section and the bearing of exhaust end
Add an axle envelope.Existing double-screw compressor axle envelope form is very simple, mainly offers specific at body corresponding with axle journal
Oil groove, be passed through the Seal Oil with certain pressure to realize axial seal.
Due to compressed media and the difference of operating condition, the axle envelope of oil injection double-screw air compressor and screw bolt refrigerant and technique compression
The axle envelope of machine is very different.When exhaust end base of oil injection threaded bolt refrigerating and technique compressor use rolling bearing by radial force, its rotor work
Axle envelope between the section of work and bearing, can use the structure identical with aforementioned screw air compressor.Sliding bearing is used to bear radially
During power, sliding bearing serves the effect of axle envelope the most automatically.
In actual product, above-mentioned Seal Oil comes from Oil-gas Separation bucket, through a series of pipelines enter compression chamber and bearing it
Between the shaft shoulder seal annular space, the pressure of actual Seal Oil, less than the pressure medium in compressor operating chamber, has part work Jie
Matter leaks into bearing bore and then returns to low pressure chamber with lubricating oil.In high-pressure process helical-lobe compressor, it is necessary to provide to sliding bearing
Pressure is higher than the lubricating oil of institute's seal gas pressure, so that bearing is covered with oil along its length, effectively acts as the effect sealed.
This is accomplished by additionally increasing a set of high-pressure oil feed device, makes system become more complicated.
In sum, the double-screw compressor working chamber exhaust side shaft seal design structure under the conditions of state of the art is too simple, real
Border running can cause the high-pressure medium in working chamber leak, make high pressure gas leakage arrive compressor low pressure chamber, so that pressure
Contracting machine volumetric efficiency reduces.Another problem that prior art exists is in high pressure unit, and the charge oil pressure of sliding bearing needs
Booster pump provides, so that unit envelope maintaining trouble, adds oiling pump power attenuation, and the time-based maintenance of lubricating oil system
Deng series of problems, it would be highly desirable to there is a kind of new screw rotor axle to seal to solve the problems referred to above.
Summary of the invention
In order to solve existing double-screw compressor rotor axle seal up for safekeeping a series of problem, the present invention now provides a kind of twin screw pressure
Contracting machine rotor shaft seal structure.Concrete technical scheme is as follows:
A kind of double-screw compressor rotor shaft seal structure, including helicla flute uniform on the shaft shoulder of screw rotor end face profile of tooth,
Described helicla flute and rotor axis have an angle, and described spiral fluted rotation direction is oppositely oriented with place screw rotor end face profile of tooth,
The normal of described spiral fluted opening direction and the place shaft shoulder has a little angle, and spiral fluted opening and rotor direction of rotation
On the contrary.When helical-lobe compressor normally works, the sealing liquid that it is internal is thrown away spiral shell by the work surface on the helicla flute of aforementioned inclination
Spin slot, the aforementioned direction of motion sealing liquid being thrown out of is consistent with the rotation direction of place screw rotor end face profile of tooth points to working chamber.
Helical-lobe compressor aerofluxus is derived from owing to sealing the supply pressure of liquid in helicla flute, and right under the promotion of helicla flute work surface
Sealing fluid acting in helicla flute, so that the sealing fluid energy being thrown out of is more than pressure medium in working chamber, so that being thrown out of
Sealing fluid flow to compressor operating chamber, it is most important that the leakage of medium can be reduced in working chamber to improve the work effect of compressor
Rate.
Compared with prior art, double-screw compressor rotor shaft seal structure of the present invention, helical-lobe compressor working chamber can be realized
The excellent sealing of interior working media, both can reduce in compression chamber and reveal, can utilize again described helicla flute to sealing fluid acting with
Increase the pressure of sealing fluid, such that it is able to simplify high-pressure screw compressor must increase the link of sliding bearing oil feed pump, drop simultaneously
Low systematic electricity energy consumption and vibrating noise level.The more existing good sealing effect of shaft seal structure of the present invention, belongs to active sealing knot
Structure, simple in construction, seal service life long, compressor volumetric efficiency can be improved.
Accompanying drawing explanation
In order to inventive feature is better described, the accompanying drawing of use required in describing embodiment below is carried out simply
Introduce.
Fig. 1 is the male rotor shaft seal structure figure using the present invention to manufacture；
Fig. 2 is the male rotor axle envelope front view using the present invention to manufacture；
Fig. 3 is the male rotor axle envelope partial enlarged drawing using the present invention to manufacture；
Fig. 4 is the male rotor axle envelope partial enlargement axis side view using the present invention to manufacture；
Fig. 5 is the armature spindle envelope and compressor host structure chart using the present invention to manufacture；
Wherein, 1 screw rotor；2 helicla flutes；Work surface in 3 helicla flutes；4 cannelures；5 annular gaps needing being sealed；
6 compressor air-discharging side working chambers；7 bearing oil back chambers；8 shaft shoulders；9 contrate tooth profiles.
Specific embodiments
The present invention is described further by embodiment below in conjunction with the accompanying drawings.
Fig. 1 is screw rod male rotor shaft seal structure figure, and the shaft seal structure of the present invention is mainly by near screw rotor 1 contrate tooth profile 9
Helicla flute 2, cannelure 4 uniform on the shaft shoulder 8 are constituted, and described helicla flute 2 has an angle with screw rotor 1 axis, should
Between angle can be spent at 5 degree-15.
As in figure 2 it is shown, for making helicla flute 2 when rotor 1 rotates, the sealing fluid in groove be done work, the rotation direction of described helicla flute 2
Oppositely oriented with place screw rotor 1 upper surface profile of tooth 9；And the opening direction of helicla flute 2 to be made and the place shaft shoulder
The normal of 8 has a little angle, described little angle can 10 degree-45 spend between, and the opening direction of described helicla flute 2 with
Rotor 1 direction of rotation wants contrary, as shown in Figure 3.
As shown in Figure 4, the sealing fluid in groove is done work inside pit by the work surface 3 tilted in helicla flute 2 when rotor 1 rotates
Sealing liquid throw away, aforementioned be thrown out of seal liquid the direction of motion consistent with the rotation direction of place screw rotor end face profile of tooth 9
And sensing working chamber, thus in the annular gap 5 needing being sealed, the working media of compressor operating intracavity is blocked.
As it is shown in figure 5, the supply pressure sealing liquid in helicla flute 2 derives from helical-lobe compressor aerofluxus, and at helicla flute 2
To sealing liquid acting under the promotion of inner working face 3, the sealing fluid pressure being thrown out of is made to be more than pressure medium in working chamber, from
And the leakage of medium can be reduced in working chamber to improve the work efficiency of compressor.
The double-screw compressor rotor shaft seal structure of the present invention disclosed in the embodiment of the present invention has simple in construction, easy to process, from
And can the overall gas production improving double-screw compressor, simultaneously reduction energy consumption and vibrating noise level.The shaft seal structure of the present invention
More existing good sealing effect, belongs to active sealing structure, simple in construction, seals service life long, can improve compressor volume
Efficiency.
The foregoing is only the concrete exemplary applications of the present invention, protection scope of the present invention is not constituted any limitation.Except above-mentioned reality
Exception, the present invention also has other embodiments.All within principle of the present invention, use equivalent modifications, equivalent or improvement etc.
Formed, should be included within the scope of claims of the present invention definition.
Claims (5)
1. a double-screw compressor rotor shaft seal structure, including the shaft shoulder (8) near screw rotor (1) contrate tooth profile (9)
Upper uniform helicla flute (2), it is characterised in that described helicla flute (2) and screw rotor (1) axis have an angle.
Double-screw compressor rotor shaft seal structure the most according to claim 1, it is characterised in that described helicla flute (2)
Rotation direction and place screw rotor (1) upper surface profile of tooth (9) oppositely oriented.
3. according to the double-screw compressor rotor shaft seal structure described in claim 1 and 2, it is characterised in that described helicla flute (2)
The normal of opening direction and the place shaft shoulder (8) have a little angle, and the opening direction of described helicla flute (2) and screw rod
Rotor (1) direction of rotation is contrary.
4. according to the double-screw compressor rotor shaft seal structure described in claim 1,2 or 3, it is characterised in that described spiral
Sealing liquid within its groove can be thrown away by the work surface (3) tilted in groove (2) when screw rotor (1) rotates, above-mentioned quilt
The direction of motion sealing liquid thrown away is consistent with the rotation direction at place screw rotor end face profile of tooth (9) and points to working chamber.
Double-screw compressor rotor shaft seal structure the most as claimed in any of claims 1 to 4, it is characterised in that institute
The supply pressure sealing liquid in stating helicla flute (2) derives from helical-lobe compressor aerofluxus, and at helicla flute (2) inner working face
(3) the sealing fluid pressure being thrown out of under promotion is more than pressure medium in working chamber, thus the letting out of medium in working chamber can be reduced
Leak to improve the work efficiency of compressor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610438227.3A CN105927542A (en) | 2016-06-20 | 2016-06-20 | Rotor shaft seal structure for double-screw compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610438227.3A CN105927542A (en) | 2016-06-20 | 2016-06-20 | Rotor shaft seal structure for double-screw compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105927542A true CN105927542A (en) | 2016-09-07 |
Family
ID=56830995
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610438227.3A Pending CN105927542A (en) | 2016-06-20 | 2016-06-20 | Rotor shaft seal structure for double-screw compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105927542A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110370483A (en) * | 2019-08-27 | 2019-10-25 | 青岛科技大学 | A kind of closed-smelting machine rotor sealing structure |
| CN112814900A (en) * | 2020-12-31 | 2021-05-18 | 浙江创为真空设备股份有限公司 | Screw pump exhaust pressure stabilizing structure |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| JP2002276574A (en) * | 2001-03-19 | 2002-09-25 | Hokuetsu Kogyo Co Ltd | Shaft sealing device for oil-free screw compressor |
| CN1388868A (en) * | 2000-08-16 | 2003-01-01 | 毕彻制冷机有限公司 | Screw-type compressor |
| CN101153597A (en) * | 2007-07-13 | 2008-04-02 | 上海飞和实业集团有限公司 | Energy-saving single-bolt compressor |
| CN205744447U (en) * | 2016-06-20 | 2016-11-30 | 西安交通大学苏州研究院 | A kind of double-screw compressor rotor shaft seal structure |
-
2016
- 2016-06-20 CN CN201610438227.3A patent/CN105927542A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN1388868A (en) * | 2000-08-16 | 2003-01-01 | 毕彻制冷机有限公司 | Screw-type compressor |
| JP2002276574A (en) * | 2001-03-19 | 2002-09-25 | Hokuetsu Kogyo Co Ltd | Shaft sealing device for oil-free screw compressor |
| CN101153597A (en) * | 2007-07-13 | 2008-04-02 | 上海飞和实业集团有限公司 | Energy-saving single-bolt compressor |
| CN205744447U (en) * | 2016-06-20 | 2016-11-30 | 西安交通大学苏州研究院 | A kind of double-screw compressor rotor shaft seal structure |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110370483A (en) * | 2019-08-27 | 2019-10-25 | 青岛科技大学 | A kind of closed-smelting machine rotor sealing structure |
| CN112814900A (en) * | 2020-12-31 | 2021-05-18 | 浙江创为真空设备股份有限公司 | Screw pump exhaust pressure stabilizing structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160907 |
|
| RJ01 | Rejection of invention patent application after publication |