CN105485006A - Screw compressor - Google Patents
Screw compressor Download PDFInfo
- Publication number
- CN105485006A CN105485006A CN201510845932.0A CN201510845932A CN105485006A CN 105485006 A CN105485006 A CN 105485006A CN 201510845932 A CN201510845932 A CN 201510845932A CN 105485006 A CN105485006 A CN 105485006A
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- Prior art keywords
- rotor
- roller bearing
- tapered roller
- air inlet
- bearing
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Abstract
The invention relates to the technical field of air compressors and discloses a screw compressor comprising an air inlet end cover, an air inlet end bearing block, a screw rotor pair and an exhaust end cover, wherein the screw rotor pair is composed of a male rotor and a female rotor; the shaft section located at the air inlet side of the male rotor is provided with a first conical roller bearing; the shaft section located at the exhaust side of the male rotor is provided with a second conical roller bearing, and the first conical roller bearing andthe second conical roller bearing are arranged in a back to back way; and the shaft section located at the air inlet side of the female rotor is provided with a third conical roller bearing, the shaft section located at the exhaust side of the female rotor is provided with a fourth conical roller bearing, and the third conical roller bearing and the fourth conical roller bearing are arranged in a back to back way. Due to the redesign of a bearing structure of the compressor, the screw compressor disclosed by the invention has the advantages of reducing the using amount of bearings and reducing the manufacturing cost under the condition that rotor location realized by virtue of the bearings is not influenced.
Description
Technical field
The present invention relates to air compressor technical field, specifically a kind of helical-lobe compressor.
Background technique
Compressor is a kind of driven fluid machinery low-pressure gas being promoted to high pressure.Compressor can be divided into piston compressor, helical-lobe compressor, centrifugal compressor etc.Compressor is obtained in multiple fields such as air conditioner refrigerating, pneumatic tool, rock drill, Hovercrafts and applies widely.
As shown in Figure 1, Fig. 1 is the sectional view of a kind of helical-lobe compressor of the prior art, the exhaust end axle of single rotor needs installation 2 or more bearing 20 (being generally that the circular cone installed in face-to-face mode or cylinder add angular contact ball bearing) to do axially locating that is radial and both direction, and inlet end uses a roller bearing to do radial location.Wherein, two tapered roller bearings near exhaust end do not bear the power of rotor when compressor full load running; only bear the axial force of short time when shutting down or unload, its effect prevents rotor from during this period of time moving to exhaust end direction, causes the phenomenon of friction rotor casing.Although so these two bearings are also in rolling when compressor operation, the most of the time is all equivalent to be in an idle state, and the rolling frictional resistance of these two bearings can increase the wasted work of compressor.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of helical-lobe compressor is provided.Helical-lobe compressor of the present invention, by redesigning the bearing structure of compressor, when not affecting bearing to rotor fixed position, reducing the usage quantity of bearing, reducing manufacture cost.
In order to achieve the above object, the invention provides a kind of helical-lobe compressor, comprise air inlet end cap, inlet end bearing support, screw rotor to and exhaust end cover; Described screw rotor forms by male rotor and female rotor; The shaft part being positioned at described male rotor air inlet side is provided with the first tapered roller bearing; The shaft part of male rotor exhaust side is provided with the second tapered roller bearing, the first tapered roller bearing and the second tapered roller bearing are back-to-back arrangement; The shaft part of described female rotor air inlet side is provided with the 3rd tapered roller bearing, the shaft part of female rotor exhaust side is provided with the 4th tapered roller bearing, and the 3rd tapered roller bearing and the 4th tapered roller bearing are back-to-back arrangement; The shaft part of the air inlet side of every roots rotor is all arranged with wavy spring, and wavy spring is between the bearing hole step and tapered roller bearing outer ring of inlet end bearing support.
The shaft part being positioned at every roots rotor air inlet side is all arranged with regulating ring, and described regulating ring is between the inlet end axle journal and tapered roller bearing of every roots rotor.
The shaft part being positioned at every roots rotor exhaust side is all arranged with spacer ring, and described spacer ring is between the exhaust end axle journal and tapered roller bearing of every roots rotor.
The male rotor endoporus step of described air inlet end cap is provided with inlet end shaft seal.
The shaft part being positioned at described male rotor air inlet side is arranged with oil sealing and joins ring, the inner ring that ring is positioned at described inlet end shaft seal joined by described oil sealing.
The effect of wavy spring is: apply a pretightening force on the conic bearing outer ring of inlet end, ensures that inlet end bearing enclose can not depart from when compressor operation.Prevent inlet end bearing outer ring from moving toward exhaust end direction when compressor shutdown and unloading.
The effect of regulating ring is: controlled within required scope by the play of inlet end bearing.
The effect of spacer ring is: the Internal and external cycle height difference of bearing, the axle journal length of rotor, and the rotor hole of casing exhaust end face, to the distance of bearing hole step, all can have the error of tens μm in the process that these three sizes are processed in reality.So need according to actual amount to size the spacer ring of respective thickness is installed between bearing inner race and rotor, control the distance of rotor end-face to casing rotor hole end face with this.
Compared with prior art, the invention has the beneficial effects as follows:
1) at least need the bearing filling more than 6 in the helical-lobe compressor of prior art, and number of bearings can be reduced to 4 by compressor of the present invention;
2) reduce the installation time that number of bearings can shorten compressor, improve efficiency of assembling
3) due to the minimizing of number of bearings, cut that section of axle journal that rotor exhaust end needs to fill bearing, the overall length of rotor is shortened, reduced the materials of rotor;
4) after reducing two bearings of exhaust end, the surface friction drag of bearing can be reduced, reduce the power consumption of compressor, raise the efficiency.
Accompanying drawing explanation
Fig. 1 is the helical-lobe compressor sectional view of prior art;
Fig. 2 is helical-lobe compressor sectional view of the present invention.
Wherein:
1-wavy spring 2-locking nut 3-regulating ring 4-second tapered roller bearing
5-spacer ring 6-casing 7-female rotor 8-inlet end bearing support
Ring joined by 9-air inlet end cap 10-first tapered roller bearing 11-inlet end shaft seal 12-oil sealing
13-male rotor 14-exhaust end cover 15-regulating ring 16-tack spring
17-cylindrical bearing 18-the 3rd tapered roller bearing 19-the 4th tapered roller bearing 20-bearing
Embodiment
Below in conjunction with specific embodiment, the invention will be further described.Should be understood that following examples only for illustration of the present invention but not for limiting scope of the present invention.
Embodiment 1:
A kind of helical-lobe compressor as shown in Figure 2, comprise air inlet end cap 9, inlet end bearing support 8, screw rotor to and exhaust end cover 14.Screw rotor forms by male rotor 13 and female rotor 7.
The shaft part being positioned at male rotor 7 air inlet side is provided with the first tapered roller bearing 10; The shaft part of male rotor 13 exhaust side is provided with the second tapered roller bearing 4, first tapered roller bearing 10 and the second tapered roller bearing 4 in back-to-back arrangement.
The shaft part of female rotor 7 air inlet side is provided with the 3rd tapered roller bearing 18, the shaft part of female rotor 7 exhaust side is provided with the 4th tapered roller bearing the 19, three tapered roller bearing 18 and the 4th tapered roller bearing 19 in back-to-back arrangement.
The shaft part being positioned at every roots rotor (male rotor 13 and female rotor 7) air inlet side is all arranged with wavy spring 1; Wavy spring 1 between inlet end bearing support sun 8 bearing hole steps and the first tapered roller bearing 10 outer ring, and between the cloudy bearing hole step of inlet end bearing support 8 and the 3rd tapered roller bearing 18 outer ring.
The shaft part being positioned at every roots rotor (male rotor 13 and female rotor 7) air inlet side is all arranged with regulating ring 15; Regulating ring 15 between male rotor 13 inlet end axle journal step and the first tapered roller bearing 10, and between female rotor 7 inlet end axle journal step and the 3rd tapered roller bearing 18.
The shaft part being positioned at every roots rotor (male rotor 13 and female rotor 7) exhaust side is all arranged with spacer ring 5; Spacer ring 5 between male rotor 13 exhaust end axle journal step and the second tapered roller bearing 4, and between female rotor 7 exhaust end axle journal step and the 4th tapered roller bearing 19.
The male rotor endoporus step of air inlet end cap 9 is provided with inlet end shaft seal 11.
The shaft part being positioned at male rotor 13 air inlet side is arranged with oil sealing and joins ring 12, the inner ring that ring 12 is positioned at inlet end shaft seal 11 joined by oil sealing.
The present invention respectively uses a tapered roller bearing at the two ends of rotor; the radial force of rotor when two bearings bear compressor operation simultaneously; during full load running, the second tapered roller bearing 4 and the 4th roller bearing 19 bear the axial force of rotor (female rotor 7 and male rotor 13) towards inlet end respectively; and when compressor unloading with when shutting down; due to the recoil of exhaust end pressurized gas; rotor is by generation axial force to exhaust end, and this power is born by the first tapered roller bearing 10.
The present invention has respectively filled a tapered roller bearing on the axle of rotor both sides, second tapered roller bearing 4 outer ring leans against on the step of casing bearing hole, inner ring is locked on rotor by locking nut 2, and during compressor operation, this bearing prevents rotor from moving toward inlet end direction.First tapered roller bearing 10 outer ring, by the step in inlet end bearing support 8 bearing hole, uses wavy spring 1 pair of bearing outer ring to add a pretightening force toward inlet end direction.When compressor unloading is shut down, the first tapered roller bearing can prevent rotor from moving towards exhaust end direction.
The bearing that the present invention uses at inlet end and exhaust end is tapered roller bearing, and cost is lower.
Below the preferred embodiment of the invention is illustrated, but the invention is not limited to described embodiment, those of ordinary skill in the art can also make all equivalent modification or replacement under the prerequisite without prejudice to the invention spirit, and these equivalent modifications or replacement are all included in the application's claim limited range.
Claims (5)
1. a helical-lobe compressor, comprise air inlet end cap, inlet end bearing support, screw rotor to and exhaust end cover; Described screw rotor forms by male rotor and female rotor; It is characterized in that: the shaft part being positioned at described male rotor air inlet side is provided with the first tapered roller bearing; The shaft part of male rotor exhaust side is provided with the second tapered roller bearing, the first tapered roller bearing and the second tapered roller bearing are back-to-back arrangement; The shaft part of described female rotor air inlet side is provided with the 3rd tapered roller bearing, the shaft part of female rotor exhaust side is provided with the 4th tapered roller bearing, and the 3rd tapered roller bearing and the 4th tapered roller bearing are back-to-back arrangement; The shaft part of the air inlet side of every roots rotor is all arranged with wavy spring, and wavy spring is between the bearing hole step and tapered roller bearing outer ring of inlet end bearing support.
2. a kind of helical-lobe compressor according to claim 1, is characterized in that: the shaft part being positioned at every roots rotor air inlet side is all arranged with regulating ring, and described regulating ring is between the inlet end axle journal and tapered roller bearing of every roots rotor.
3. a kind of helical-lobe compressor according to claim 1, is characterized in that: the shaft part being positioned at every roots rotor exhaust side is all arranged with spacer ring, and described spacer ring is between the exhaust end axle journal and tapered roller bearing of every roots rotor.
4. a kind of helical-lobe compressor according to claim 1, is characterized in that: the male rotor endoporus step of described air inlet end cap is provided with inlet end shaft seal.
5. a kind of helical-lobe compressor according to claim 4, is characterized in that: the shaft part being positioned at described male rotor air inlet side is arranged with oil sealing and joins ring, the inner ring that ring is positioned at described inlet end shaft seal joined by described oil sealing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510845932.0A CN105485006B (en) | 2015-11-27 | 2015-11-27 | A kind of helical-lobe compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510845932.0A CN105485006B (en) | 2015-11-27 | 2015-11-27 | A kind of helical-lobe compressor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105485006A true CN105485006A (en) | 2016-04-13 |
| CN105485006B CN105485006B (en) | 2018-08-21 |
Family
ID=55672214
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510845932.0A Active CN105485006B (en) | 2015-11-27 | 2015-11-27 | A kind of helical-lobe compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105485006B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109458330A (en) * | 2018-09-30 | 2019-03-12 | 宁波鲍斯能源装备股份有限公司 | Water jet helical-lobe compressor |
| CN110192034A (en) * | 2017-02-20 | 2019-08-30 | 大金工业株式会社 | Helical-lobe compressor |
| CN114458597A (en) * | 2022-02-21 | 2022-05-10 | 陈步西 | Novel screw air compressor |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02199292A (en) * | 1989-01-27 | 1990-08-07 | Hokuetsu Kogyo Co Ltd | Bearing device for oilfree screw-vacuum pump |
| JPH08121353A (en) * | 1994-10-26 | 1996-05-14 | Nippon Piston Ring Co Ltd | Rotary vane type pump |
| CN1336986A (en) * | 1999-01-11 | 2002-02-20 | 纳幕尔杜邦公司 | Screw compressor |
| CN202789550U (en) * | 2012-08-30 | 2013-03-13 | 上海格什特螺杆科技有限公司 | Bearing component for exhaust end of air compressor |
| CN202789551U (en) * | 2012-08-30 | 2013-03-13 | 上海格什特螺杆科技有限公司 | Exhaust end bearing component of oil injection screw compressor |
| CN205207173U (en) * | 2015-11-27 | 2016-05-04 | 上海格什特螺杆科技有限公司 | Screw compressor |
-
2015
- 2015-11-27 CN CN201510845932.0A patent/CN105485006B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02199292A (en) * | 1989-01-27 | 1990-08-07 | Hokuetsu Kogyo Co Ltd | Bearing device for oilfree screw-vacuum pump |
| JPH08121353A (en) * | 1994-10-26 | 1996-05-14 | Nippon Piston Ring Co Ltd | Rotary vane type pump |
| CN1336986A (en) * | 1999-01-11 | 2002-02-20 | 纳幕尔杜邦公司 | Screw compressor |
| CN202789550U (en) * | 2012-08-30 | 2013-03-13 | 上海格什特螺杆科技有限公司 | Bearing component for exhaust end of air compressor |
| CN202789551U (en) * | 2012-08-30 | 2013-03-13 | 上海格什特螺杆科技有限公司 | Exhaust end bearing component of oil injection screw compressor |
| CN205207173U (en) * | 2015-11-27 | 2016-05-04 | 上海格什特螺杆科技有限公司 | Screw compressor |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110192034A (en) * | 2017-02-20 | 2019-08-30 | 大金工业株式会社 | Helical-lobe compressor |
| CN109458330A (en) * | 2018-09-30 | 2019-03-12 | 宁波鲍斯能源装备股份有限公司 | Water jet helical-lobe compressor |
| CN114458597A (en) * | 2022-02-21 | 2022-05-10 | 陈步西 | Novel screw air compressor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105485006B (en) | 2018-08-21 |
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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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190726 Address after: 201504 No. 1555 Tingfeng Highway, Tinglin Town, Jinshan District, Shanghai Patentee after: SHANGHAI SCREW COMPRESSOR Co.,Ltd. Address before: 201504 No. 1555 Tingfeng Highway, Tinglin Town, Jinshan District, Shanghai Patentee before: SHANGHAI GLOBE SCREW TECHNOLOGY Co.,Ltd. |
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| TR01 | Transfer of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: a screw compressor Effective date of registration: 20220819 Granted publication date: 20180821 Pledgee: Shanghai Rural Commercial Bank Co.,Ltd. Jinshan sub branch Pledgor: SHANGHAI SCREW COMPRESSOR Co.,Ltd. Registration number: Y2022310000188 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |