CN106351831B - The Spiral Lobe Refrigeration Compressor of flex rotor contact sealing - Google Patents
The Spiral Lobe Refrigeration Compressor of flex rotor contact sealing Download PDFInfo
- Publication number
- CN106351831B CN106351831B CN201611006620.1A CN201611006620A CN106351831B CN 106351831 B CN106351831 B CN 106351831B CN 201611006620 A CN201611006620 A CN 201611006620A CN 106351831 B CN106351831 B CN 106351831B
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- Prior art keywords
- rotor
- suction side
- male rotor
- female rotor
- female
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Classifications
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- 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
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C18/12—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
- F04C18/14—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
- F04C18/16—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
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- 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
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C18/082—Details specially related to intermeshing engagement type pumps
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- 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
-
- 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
- F04C29/12—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
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 kind of Spiral Lobe Refrigeration Compressor of flex rotor contact sealing.Suction and discharge side of the present invention Supporting cover corresponds to male rotor main shaft, the position of female rotor main shaft offers the male rotor bearing hole and female rotor bearing hole axially penetrated through, bearing hole radially opens up fluted, rotor flexibility column spring is placed with groove, one end of flexible columnar spring is bonded with groove, the other end is placed with advance ball, the outside diameter of advance ball is more than the internal diameter of flexible columnar spring, and opposite can slide.The present invention utilizes flexible columnar spring and advance ball, negative and positive rotor is promoted radially to move towards, the flank of tooth is set to be in close contact in region of engagement, form continuous contact line, the transverse leakage that radial clearance produces is eliminated, improves volumetric efficiency, improves the thermal performance of Spiral Lobe Refrigeration Compressor, the operational efficiency of refrigerated air-conditioning system is improved, saves energy consumption.
Description
Technical field
The present invention relates to technical field of refrigeration compressors, is a kind of screw bolt refrigerant compression with flex rotor contact sealing
Machine.
Background technology
Due to having the characteristics that parts are few, suction and discharge are continuous, smooth running, Spiral Lobe Refrigeration Compressor is widely used at present
In refrigerated air-conditioning system, but due to reasons such as machining accuracy and assembly precisions, the negative and positive rotor flank of tooth is caused footpath occur in region of engagement
To gap, cause higher-pressure region to be leaked to the gas transverse in low-pressure area, vertical axial direction, cause volumetric efficiency to reduce, export gas
Amount is reduced, and the thermal performance of refrigeration compressor declines, and is such as reduced or is eliminated radial clearance, then can greatly improve screw bolt refrigerant pressure
The thermal performance of contracting machine, but there are no the research report and specific embodiment of the related above problem at present.
The content of the invention
The present invention is to overcome shortcoming of the prior art, there is provided one kind eliminates radial clearance, improves volume effect
Rate, improves the Spiral Lobe Refrigeration Compressor of thermal performance.
The present invention is achieved through the following technical solutions：
The Spiral Lobe Refrigeration Compressor of the flex rotor contact sealing of the present invention, including male rotor, body, female rotor, the moon turn
Sub- main shaft, male rotor main shaft, engine base, male rotor bearing hole, female rotor bearing hole, vent connection, air-breathing bolt of cover, air-breathing connect
Pipe, air-breathing side end cap, exhaust end cover bolt, exhaust side end cap, exhaust side Supporting cover, suction side Supporting cover, exhaust outlet, male rotor
Flexible columnar spring, male rotor advance ball, female rotor flexible columnar spring, female rotor advance ball and air entry；The row
Gas side Supporting cover corresponds to male rotor main shaft, the position of female rotor main shaft offers the male rotor bearing hole and the moon axially penetrated through respectively
Armature spindle bearing bore, male rotor bearing hole radially offer male rotor groove, male rotor flexible columnar are placed with male rotor groove
Spring, one end of male rotor flexible columnar spring are bonded with male rotor groove, and the other end of male rotor flexible columnar spring is placed with
Male rotor advance ball, the outside diameter of male rotor advance ball are more than the internal diameter of male rotor flexible columnar spring, and male rotor slides rolling
Pearl slides with respect to male rotor groove, and female rotor bearing hole radially offers female rotor groove, and cloudy turn is placed with female rotor groove
Sub- flexible columnar spring, one end of female rotor flexible columnar spring are bonded with female rotor groove, female rotor flexible columnar spring
The other end is placed with female rotor advance ball, and the outside diameter of female rotor advance ball is more than the internal diameter of female rotor flexible columnar spring, cloudy
Rotor advance ball is slided with respect to female rotor groove；Exhaust side Supporting cover correspond to yin, yang rotor exhaust position be equipped with axially penetrate through
Exhaust outlet, the bolt hole that exhaust side Supporting cover corresponds to body offers the bolt hole axially penetrated through；The exhaust side end cap
The vent position of corresponding exhaust side Supporting cover is equipped with exhausting-gas hole, and exhausting-gas hole is welded to connect with vent connection, is vented side end cap pair
The male rotor bearing hole site of exhaust side Supporting cover is answered to offer perforative bearing hole；The axial both ends of the male rotor turn with sun
Sub- main shaft is simultaneously structure as a whole, and the axial both ends of female rotor and female rotor main shaft are simultaneously structure as a whole, male rotor have four it is spiral
Tooth, female rotor have six helical tooths, and the helical tooth of male rotor and female rotor has multiple space contact points, male rotor and the moon vertically
Rotor is engaged and is axially inserted into the cylinder-bore for placing body, and engine base is welded to connect with body；The suction side Supporting cover pair
Male rotor main shaft, the position of female rotor main shaft is answered to offer the suction side male rotor bearing hole and suction side female rotor axially penetrated through
Bearing hole, suction side male rotor bearing hole radially offer suction side male rotor groove, are placed with suction side male rotor groove
Suction side male rotor flexible columnar spring, one end and the suction side male rotor groove of suction side male rotor flexible columnar spring paste
Close, the other end of suction side male rotor flexible columnar spring is placed with suction side male rotor advance ball, and suction side male rotor slides
The outside diameter of ball is more than the internal diameter of suction side male rotor flexible columnar spring, and suction side male rotor advance ball is with respect to suction side sun
Rotor recesses are slided, and suction side female rotor bearing hole radially offers suction side female rotor groove, suction side female rotor groove
Suction side female rotor flexible columnar spring is inside placed with, one end of suction side female rotor flexible columnar spring and suction side female rotor are recessed
Groove is bonded, and the other end of suction side female rotor flexible columnar spring is placed with suction side female rotor advance ball, suction side female rotor
The outside diameter of advance ball is more than the internal diameter of suction side female rotor flexible columnar spring, and suction side female rotor advance ball is with respect to air-breathing
Side female rotor groove slides；Suction side Supporting cover corresponds to yin, yang rotor suction position and is equipped with the air entry axially penetrated through, suction side
The bolt hole that Supporting cover corresponds to body offers the bolt hole axially penetrated through.
Air-breathing side end cap is made of flange chassis and end cap, and corresponding air-breathing adapter position is equipped with suction hole and is taken over air-breathing
It is welded to connect, is tightly connected by air-breathing bolt of cover, gasket seal and suction side Supporting cover and body.
The present invention has the following technical effect that：
The Spiral Lobe Refrigeration Compressor of the flex rotor contact sealing of the present invention, using flexible columnar spring and advance ball,
Promote negative and positive rotor radially to move towards, the flank of tooth is in close contact in region of engagement, form continuous contact line, eliminate between radial direction
The transverse leakage that gap produces, improves volumetric efficiency, improves the thermal performance of Spiral Lobe Refrigeration Compressor, improve refrigerated air-conditioning system
Operational efficiency, saves energy consumption.
Brief description of the drawings
Fig. 1 is the schematic diagram of the Spiral Lobe Refrigeration Compressor (the A-A section views of Fig. 3) of flex rotor of the present invention contact sealing；
Fig. 2 is B-B direction sectional view；
Fig. 3 is shape top view；
Fig. 4 is C-C to sectional view.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail
As Figure 1-Figure 4, the Spiral Lobe Refrigeration Compressor of flex rotor of the invention contact sealing, including male rotor 1, machine
Body 2, female rotor 3, female rotor main shaft 4, male rotor main shaft 5, engine base 6, male rotor bearing hole 7-1, female rotor bearing hole 8-1, suction
Gas side male rotor bearing hole 7-2, suction side female rotor bearing hole 8-2, vent connection 9, air-breathing bolt of cover 10, air-breathing adapter
11st, air-breathing side end cap 12, exhaust end cover bolt 13, exhaust side end cap 14, exhaust side Supporting cover 15, suction side Supporting cover 16, row
Gas port 17, male rotor flexible columnar spring 18-1, male rotor advance ball 19-1, female rotor flexible columnar spring 20-1, the moon turn
Sub- advance ball 21-1, air entry 22.
The exhaust side Supporting cover 15 corresponds to male rotor main shaft 5, the position of female rotor main shaft 4 offers the sun axially penetrated through
Armature spindle bearing bore 7-1 and female rotor bearing hole 8-1, male rotor bearing hole 7-1 radially offer male rotor groove, and male rotor is recessed
Male rotor flexible columnar spring 18-1 is placed with groove, one end of male rotor flexible columnar spring 18-1 is bonded with male rotor groove,
The other end is placed with male rotor advance ball 19-1, and the outside diameter of male rotor advance ball 19-1 is more than male rotor flexible columnar spring
The internal diameter of 18-1, and opposite can slide, female rotor bearing hole 8-1 radially offers female rotor groove, is put in female rotor groove
There is female rotor flexible columnar spring 20-1, one end of female rotor flexible columnar spring 20-1 is bonded with female rotor groove, the other end
Female rotor advance ball 21-1 is placed with, the outside diameter of female rotor advance ball 21-1 is interior more than female rotor flexible columnar spring 20-1
Footpath, and opposite can slide；Exhaust side Supporting cover corresponds to negative and positive rotor exhaust position and is equipped with the exhaust outlet 17 axially penetrated through, exhaust side
The bolt hole that Supporting cover corresponds to body 2 offers the bolt hole axially penetrated through.
17 position of exhaust outlet of the correspondence exhaust side Supporting cover 15 of the exhaust side end cap 14 is equipped with exhausting-gas hole, exhausting-gas hole and
Vent connection 9 is welded to connect, and the male rotor bearing hole 7-1 positions of corresponding exhaust side Supporting cover 15 offer perforative bearing hole；
The body 2 is sealed by exhaust end cover bolt 13, exhaust end cover gasket seal and exhaust side end cap 14, exhaust side Supporting cover 15
Connection.
The axial both ends of the male rotor 1 and male rotor main shaft 5 are simultaneously structure as a whole, the axial both ends of female rotor 3 with it is cloudy
Rotor main shaft 4 is simultaneously structure as a whole, and male rotor 1 has four helical tooths, and female rotor 3 has six helical tooths, male rotor 1 and female rotor
3 helical tooth has multiple space contact points vertically, and male rotor 1 and female rotor 3 engage and are axially inserted into the gas for placing body 2
In cylinder holes, engine base 6 is welded to connect with body 2.
The suction side Supporting cover 16 corresponds to male rotor main shaft 5, the position of female rotor main shaft 4 offers the suction axially penetrated through
Gas side male rotor bearing hole 7-2 and suction side female rotor bearing hole 8-2, suction side male rotor bearing hole 7-2 are radially offered
Suction side male rotor groove, suction side male rotor flexible columnar spring 18-2, suction side sun are placed with suction side male rotor groove
One end of rotor flexibility column spring 18-2 is bonded with suction side male rotor groove, and the other end is placed with suction side male rotor and slides rolling
The outside diameter of pearl 19-2, suction side male rotor advance ball 19-2 are more than the internal diameter of suction side male rotor flexible columnar spring 18-2,
And opposite can slide, suction side female rotor bearing hole 8-2 radially offers suction side female rotor groove, and suction side female rotor is recessed
Suction side female rotor flexible columnar spring 20-2, one end of suction side female rotor flexible columnar spring 20-2 and air-breathing are placed with groove
Side female rotor groove fitting, the other end are placed with suction side female rotor advance ball 21-2, suction side female rotor advance ball 21-2
Outside diameter be more than the internal diameter of suction side female rotor flexible columnar spring 20-2, and opposite can slide；Suction side Supporting cover corresponds to cloudy
Male rotor suction location is equipped with the air entry 22 axially penetrated through, and the bolt hole that suction side Supporting cover corresponds to body 2 offers axial direction
Perforative bolt hole.
The air-breathing side end cap 12 is made of flange chassis and end cap, corresponding 11 position of air-breathing adapter equipped with suction hole and with
Air-breathing adapter 11 is welded to connect, and passes through air-breathing bolt of cover 10, suction end sealing cushion for cover piece and suction side Supporting cover 16 and body 2
It is tightly connected.
During assembling, engine base 6 is welded to connect with body 2, and male rotor 1 and female rotor 3 are engaged and are axially inserted into and place body 2
Cylinder-bore in, it is soft that male rotor is placed in male rotor bearing hole 7-1 and female rotor bearing hole the 8-1 groove of exhaust side Supporting cover 15
Property column spring 18-1, male rotor advance ball 19-1, female rotor flexible columnar spring 20-1 and female rotor advance ball 21-1,
The male rotor bearing hole 7-1 and female rotor bearing hole 8-1 of exhaust side Supporting cover 15 are each passed through male rotor main shaft 5 and female rotor master
Axis 4, exhaust side end cap 14 pass through male rotor main shaft 5, and body 2 is passed through exhaust end cover bolt 13, gasket seal and exhaust side
Lid 14, exhaust side Supporting cover 15 are tightly connected, the exhausting-gas hole welding vent connection 9 of exhaust side end cap 14；Suction side Supporting cover 16
Suction side male rotor bearing hole 7-2 and suction side female rotor bearing hole 8-2 groove in place suction side male rotor respectively soft
Property column spring 18-2, suction side male rotor advance ball 19-2, suction side female rotor flexible columnar spring 20-2 and suction side
Female rotor advance ball 21-2, the suction side male rotor bearing hole 7-2 and suction side female rotor bearing hole of suction side Supporting cover 16
8-2 is each passed through male rotor main shaft 5 and female rotor main shaft 4, and body 2 is passed through air-breathing bolt of cover 10, gasket seal and air-breathing
Side end cap 12, suction side Supporting cover 16 are tightly connected.
As shown in figure 4, when refrigeration compressor is run, motor drives male rotor to rotate clockwise by male rotor main shaft 5,
Male rotor 1 drives female rotor 3 to rotate counterclockwise, and the low-temperature low-pressure refrigerant gas for absorbing evaporator passes through 11 He of air-breathing adapter
Air entry 22, into the interdental spaces of negative and positive rotor, turns over air-breathing aperture air-breathing and terminates, into compression process, pressure rise, when
When reaching vent ports, the gas of high temperature and pressure discharges refrigeration compressor, male rotor flexible column into exhausting-gas hole and vent connection 9 excessively
Shape spring promotes male rotor main shaft 5 through male rotor advance ball, and female rotor flexible columnar spring is promoted through female rotor advance ball
Female rotor main shaft 4, makes the helical tooth of male rotor 1 and female rotor 3 have multiple spaces contact point to be in close contact vertically, elimination the moon,
The transverse leakage of radial clearance between male rotor.
The above is only the preferred embodiment of the present invention, it is noted that for the common skill of the art
For art personnel, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications
Also it should be regarded as protection scope of the present invention.
Claims (1)
1. a kind of Spiral Lobe Refrigeration Compressor of flex rotor contact sealing, it is characterised in that turn including male rotor, body, the moon
Son, female rotor main shaft, male rotor main shaft, engine base, male rotor bearing hole, female rotor bearing hole, vent connection, air-breathing end cap spiral shell
Bolt, air-breathing adapter, air-breathing side end cap, exhaust end cover bolt, exhaust side end cap, exhaust side Supporting cover, suction side Supporting cover, exhaust
Mouth, male rotor flexible columnar spring, male rotor advance ball, female rotor flexible columnar spring, female rotor advance ball and air-breathing
Mouthful；The exhaust side Supporting cover corresponds to male rotor main shaft, the position of female rotor main shaft offers the male rotor axially penetrated through respectively
Bearing hole and female rotor bearing hole, male rotor bearing hole radially offer male rotor groove, and sun is placed with male rotor groove and is turned
Sub- flexible columnar spring, one end of male rotor flexible columnar spring are bonded with male rotor groove, male rotor flexible columnar spring
The other end is placed with male rotor advance ball, and the outside diameter of male rotor advance ball is more than the internal diameter of male rotor flexible columnar spring, sun
Rotor advance ball is slided with respect to male rotor groove, and female rotor bearing hole radially offers female rotor groove, female rotor groove
Female rotor flexible columnar spring is inside placed with, one end of female rotor flexible columnar spring is bonded with female rotor groove, and female rotor is flexible
The other end of column spring is placed with female rotor advance ball, and the outside diameter of female rotor advance ball is more than female rotor flexible columnar spring
Internal diameter, female rotor advance ball with respect to female rotor groove slide；Exhaust side Supporting cover corresponds to yin, yang rotor exhaust position and is equipped with
The exhaust outlet axially penetrated through, the bolt hole that exhaust side Supporting cover corresponds to body offer the bolt hole axially penetrated through；The exhaust
The vent position of the correspondence exhaust side Supporting cover of side end cap is equipped with exhausting-gas hole, and exhausting-gas hole is welded to connect with vent connection, exhaust
The male rotor bearing hole site that side end cap corresponds to exhaust side Supporting cover offers perforative bearing hole；Axial the two of the male rotor
End is with male rotor main shaft and being structure as a whole, and the axial both ends of female rotor and female rotor main shaft are simultaneously structure as a whole, male rotor
There are four helical tooths, female rotor has six helical tooths, and the helical tooth of male rotor and female rotor has multiple space contact points vertically,
Male rotor and female rotor are engaged and are axially inserted into the cylinder-bore for placing body, and engine base is welded to connect with body；The air-breathing
Side Supporting cover corresponds to male rotor main shaft, the position of female rotor main shaft offers the suction side male rotor bearing hole axially penetrated through and suction
Gas side female rotor bearing hole, suction side male rotor bearing hole radially offer suction side male rotor groove, suction side male rotor
Suction side male rotor flexible columnar spring is placed with groove, one end and the suction side sun of suction side male rotor flexible columnar spring turn
Sub- groove fitting, the other end of suction side male rotor flexible columnar spring are placed with suction side male rotor advance ball, suction side sun
The outside diameter of rotor advance ball is more than the internal diameter of suction side male rotor flexible columnar spring, and suction side male rotor advance ball is opposite
Suction side male rotor groove slides, and suction side female rotor bearing hole radially offers suction side female rotor groove, and suction side is cloudy
Suction side female rotor flexible columnar spring, one end of suction side female rotor flexible columnar spring and suction side are placed with rotor recesses
Female rotor groove is bonded, and the other end of suction side female rotor flexible columnar spring is placed with suction side female rotor advance ball, air-breathing
The outside diameter of side female rotor advance ball is more than the internal diameter of suction side female rotor flexible columnar spring, suction side female rotor advance ball
Slided with respect to suction side female rotor groove；Suction side Supporting cover corresponds to yin, yang rotor suction position and is equipped with the air-breathing axially penetrated through
Mouthful, the bolt hole that suction side Supporting cover corresponds to body offers the bolt hole axially penetrated through；
The air-breathing side end cap is made of flange chassis and end cap, and air-breathing side end cap corresponds to air-breathing adapter position and is equipped with suction hole,
Suction hole is welded to connect with air-breathing adapter, passes through air-breathing bolt of cover, suction end sealing cushion for cover piece and suction side Supporting cover and machine
Body is tightly connected；
The body is connected by exhaust end cover bolt, exhaust end cover gasket seal and exhaust side end cap, the sealing of exhaust side Supporting cover
Connect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611006620.1A CN106351831B (en) | 2016-11-16 | 2016-11-16 | The Spiral Lobe Refrigeration Compressor of flex rotor contact sealing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611006620.1A CN106351831B (en) | 2016-11-16 | 2016-11-16 | The Spiral Lobe Refrigeration Compressor of flex rotor contact sealing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106351831A CN106351831A (en) | 2017-01-25 |
| CN106351831B true CN106351831B (en) | 2018-05-11 |
Family
ID=57861834
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611006620.1A Active CN106351831B (en) | 2016-11-16 | 2016-11-16 | The Spiral Lobe Refrigeration Compressor of flex rotor contact sealing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106351831B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3327352A1 (en) * | 1983-07-29 | 1985-02-07 | Robert Bosch Gmbh, 7000 Stuttgart | Toothed-gear machine |
| CN2316489Y (en) * | 1996-11-15 | 1999-04-28 | 刘殿魁 | Rotor pump without turning clearance |
| CN201050481Y (en) * | 2007-06-18 | 2008-04-23 | 陈全玉 | Mechanical seal leakage-free Root's vacuum pump |
| CN102400907A (en) * | 2011-11-08 | 2012-04-04 | 重庆大学 | Internal gear pump |
| CN206190521U (en) * | 2016-11-16 | 2017-05-24 | 天津商业大学 | Refrigeration screw compressor of flexible rotor contact seal |
-
2016
- 2016-11-16 CN CN201611006620.1A patent/CN106351831B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3327352A1 (en) * | 1983-07-29 | 1985-02-07 | Robert Bosch Gmbh, 7000 Stuttgart | Toothed-gear machine |
| CN2316489Y (en) * | 1996-11-15 | 1999-04-28 | 刘殿魁 | Rotor pump without turning clearance |
| CN201050481Y (en) * | 2007-06-18 | 2008-04-23 | 陈全玉 | Mechanical seal leakage-free Root's vacuum pump |
| CN102400907A (en) * | 2011-11-08 | 2012-04-04 | 重庆大学 | Internal gear pump |
| CN206190521U (en) * | 2016-11-16 | 2017-05-24 | 天津商业大学 | Refrigeration screw compressor of flexible rotor contact seal |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106351831A (en) | 2017-01-25 |
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Effective date of registration: 20190604 Address after: 510935 No. 1108 East Avenue, Conghua City, Guangzhou, Guangdong Province Patentee after: Johnson of Hitachi (Guangzhou) Co., Ltd. Wanbao air conditioning Address before: Tianjin highway 300134 East Tianjin District of Beichen City Patentee before: Tianjin University Of Commerce |