CN106351831A - Flexible rotor contact sealing screw rod refrigeration compressor - Google Patents
Flexible rotor contact sealing screw rod refrigeration compressor Download PDFInfo
- Publication number
- CN106351831A CN106351831A CN201611006620.1A CN201611006620A CN106351831A CN 106351831 A CN106351831 A CN 106351831A CN 201611006620 A CN201611006620 A CN 201611006620A CN 106351831 A CN106351831 A CN 106351831A
- Authority
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- China
- Prior art keywords
- rotor
- suction side
- male rotor
- female rotor
- female
- 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.)
- Granted
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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 flexible rotor contact sealing screw rod refrigeration compressor. An axially penetrating male rotor bearing hole and an axially penetrating female rotor bearing hole are formed in positions, corresponding to a male rotor main shaft and a female rotor main shaft, of a gas suction and exhaust side support cover; the bearing holes are provided with grooves in the radial direction; a rotor flexible column type spring is put in each groove; one end of each flexible column type spring is attached to the corresponding groove; the other end of the flexible column type spring is provided with a sliding rolling ball; the outer diameter of the sliding rolling ball is greater than the inner diameter of the flexible column type spring, and can relatively slide. The flexible column type spring and the sliding rolling balls are used; a male rotor and a female rotor are pushed to move in opposite directions in the radial direction, so that the tooth surfaces are in tight contact in the engagement region; continuous contact lines are formed; the transverse leakage caused by radial gaps is eliminated; the volume efficiency is improved; the thermal performance of a screw rod refrigeration compressor is improved; the operation efficiency of a refrigeration air conditioner system is improved; the energy source consumption is reduced.
Description
Technical field
The present invention relates to technical field of refrigeration compressors, it is a kind of screw bolt refrigerant compression with flex rotor contact sealing
Machine.
Background technology
Due to having that parts are few, suction and discharge continuous, smooth running the features such as, 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, lead to the negative and positive rotor flank of tooth, in region of engagement, footpath occurs
To gap, cause the gas transverse leakage to low-pressure area, vertical axial direction for the higher-pressure region, cause volumetric efficiency to reduce, export gas
Amount reduces, and the thermal performance of refrigeration compressor declines, and such as reduces or eliminates radial clearance, then can greatly improve screw bolt refrigerant pressure
The thermal performance of contracting machine, but there are no research report and the specific embodiment of related the problems referred to above at present.
Content of the invention
The present invention is to overcome weak point of the prior art, providing a kind of elimination radial clearance, improve 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, turns including male rotor, body, female rotor, the moon
Sub- main shaft, male rotor main shaft, support, male rotor dead eye, female rotor dead eye, vent connection, air-breathing bolt of cover, air-breathing connect
Pipe, air-breathing side end cap, exhaust end cover bolt, aerofluxuss side end cap, exhaust side support lid, suction side to support lid, air vent, male rotor
Flexible columnar spring, male rotor advance ball, female rotor flexible columnar spring, female rotor advance ball and air entry；Described row
The corresponding male rotor main shaft of gas collateral support lid, the position of female rotor main shaft offer the male rotor dead eye axially penetrating through and the moon respectively
Armature spindle bearing bore, male rotor dead eye radially offers male rotor groove, is placed with male rotor flexible columnar in male rotor groove
Spring, fitted with male rotor groove in one end of male rotor flexible columnar spring, the other end of male rotor flexible columnar spring is placed with
Male rotor advance ball, the external diameter of male rotor advance ball is more than the internal diameter of male rotor flexible columnar spring, and male rotor slides and rolls
Pearl slides relative to male rotor groove, and female rotor dead eye radially offers female rotor groove, is placed with cloudy turning in female rotor groove
Sub- flexible columnar spring, fitted with female rotor groove in one end of female rotor flexible columnar spring, female rotor flexible columnar spring
The other end is placed with female rotor advance ball, and the external diameter of female rotor advance ball is more than the internal diameter of female rotor flexible columnar spring, cloudy
Rotor advance ball slides relative to female rotor groove；Exhaust side supports the corresponding yin, yang rotor exhaust position of lid to be provided with and axially penetrates through
Air vent, exhaust side supports the bolt hole of the corresponding body of lid to offer the bolt hole axially penetrating through；Described aerofluxuss side end cap
Corresponding exhaust side supports the vent position of lid to be provided with steam vent, and steam vent is welded to connect with vent connection, aerofluxuss side end cap pair
Exhaust side is answered to support the male rotor bearing hole site of lid to offer the dead eye running through；The axial two ends of described male rotor are turned with sun
Sub- main shaft is simultaneously structure as a whole, and the axial two ends of female rotor with female rotor main shaft and are structure as a whole, and male rotor has four spirals
Tooth, female rotor has six helical tooths, and the helical tooth of male rotor and female rotor has multiple spaces contact point, male rotor and the moon vertically
Rotor engages and is axially inserted in the cylinder-bore placing body, and support is welded to connect with body；Described suction side supports lid right
Male rotor main shaft, the position of female rotor main shaft is answered to offer the suction side male rotor dead eye axially penetrating through and suction side female rotor
Dead eye, suction side male rotor dead eye radially offers suction side male rotor groove, is placed with suction side male rotor groove
Suction side male rotor flexible columnar spring, one end of suction side male rotor flexible columnar spring is pasted with suction side male rotor groove
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 external 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 relative to suction side sun
Rotor recesses are slided, and suction side female rotor dead eye radially offers suction side female rotor groove, suction side female rotor groove
Inside it is placed with suction side female rotor flexible columnar spring, one end of suction side female rotor flexible columnar spring is recessed with suction side female rotor
Groove is fitted, 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 external 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 relative to air-breathing
Side female rotor groove slides；Suction side supports the corresponding yin, yang rotor suction position of lid to be provided with the air entry axially penetrating through, suction side
The bolt hole supporting the corresponding body of lid offers the bolt hole axially penetrating through.
Air-breathing side end cap is made up of flange chassis and end cap, and corresponding air-breathing adapter position is provided with suction hole and is taken over air-breathing
It is welded to connect, support lid and body to be tightly connected by air-breathing bolt of cover, gasket seal and suction side.
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, so that the flank of tooth is in close contact in region of engagement, form continuous contact line, between eliminating radially
The transverse leakage that gap produces, improves volumetric efficiency, improves the thermal performance of Spiral Lobe Refrigeration Compressor, improves refrigerated air-conditioning system
Operational efficiency, energy saving consumption.
Brief description
The schematic diagram of the Spiral Lobe Refrigeration Compressor (the a-a section view of Fig. 3) for flex rotor of the present invention contact sealing for the Fig. 1；
Fig. 2 is b-b to sectional view；
Fig. 3 is profile top view；
Fig. 4 is c-c to sectional view.
Specific 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 the flex rotor contact sealing of the present invention, including male rotor 1, machine
Body 2, female rotor 3, female rotor main shaft 4, male rotor main shaft 5, support 6, male rotor dead eye 7-1, female rotor dead eye 8-1, suction
Gas side male rotor dead eye 7-2, suction side female rotor dead eye 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, aerofluxuss side end cap 14, exhaust side support lid 15, suction side to support lid 16, row
QI KOU 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.
Described exhaust side supports the corresponding male rotor main shaft 5 of lid 15, the position of female rotor main shaft 4 to offer the sun axially penetrating through
Armature spindle bearing bore 7-1 and female rotor dead eye 8-1, male rotor dead eye 7-1 radially offers male rotor groove, and male rotor is recessed
It is placed with male rotor flexible columnar spring 18-1, fitted with male rotor groove in one end of male rotor flexible columnar spring 18-1 in groove,
The other end is placed with male rotor advance ball 19-1, and the external diameter of male rotor advance ball 19-1 is more than male rotor flexible columnar spring
The internal diameter of 18-1, and can relatively slide, female rotor dead eye 8-1 radially offers female rotor groove, puts in female rotor groove
There is female rotor flexible columnar spring 20-1, fitted with female rotor groove in one end of female rotor flexible columnar spring 20-1, the other end
It is placed with female rotor advance ball 21-1, the external diameter of female rotor advance ball 21-1 is more than the interior of female rotor flexible columnar spring 20-1
Footpath, and can relatively slide；Exhaust side supports the corresponding negative and positive rotor exhaust position of lid to be provided with the air vent 17 axially penetrating through, exhaust side
The bolt hole supporting the corresponding body 2 of lid offers the bolt hole axially penetrating through.
The corresponding exhaust side of described aerofluxuss side end cap 14 supports air vent 17 position of lid 15 to be provided with steam vent, steam vent with
Vent connection 9 is welded to connect, and corresponding exhaust side supports the male rotor dead eye 7-1 position of lid 15 to offer the dead eye running through；
Described body 2 passes through exhaust end cover bolt 13, exhaust end cover gasket seal and aerofluxuss side end cap 14, exhaust side supports lid 15 sealing
Connect.
The axial two ends of described male rotor 1 with male rotor main shaft 5 and are structure as a whole, the axial two ends of female rotor 3 with 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 spaces contact point, male rotor 1 and female rotor 3 to engage vertically and is axially inserted into the gas placing body 2
In cylinder holes, support 6 is welded to connect with body 2.
Described suction side supports the corresponding male rotor main shaft 5 of lid 16, the position of female rotor main shaft 4 to offer the suction axially penetrating through
Gas side male rotor dead eye 7-2 and suction side female rotor dead eye 8-2, suction side male rotor dead eye 7-2 radially offer
Suction side male rotor groove, is placed with suction side male rotor flexible columnar spring 18-2, suction side sun in suction side male rotor groove
Fitted with suction side male rotor groove in one end of rotor flexibility column spring 18-2, the other end is placed with the slip rolling of suction side male rotor
The external diameter of pearl 19-2, suction side male rotor advance ball 19-2 is more than the internal diameter of suction side male rotor flexible columnar spring 18-2,
And can relatively slide, suction side female rotor dead eye 8-2 radially offers suction side female rotor groove, and suction side female rotor is recessed
It is placed with suction side female rotor flexible columnar spring 20-2, one end of suction side female rotor flexible columnar spring 20-2 and air-breathing in groove
Side female rotor groove laminating, the other end is placed with suction side female rotor advance ball 21-2, suction side female rotor advance ball 21-2
External diameter be more than the internal diameter of suction side female rotor flexible columnar spring 20-2, and can relatively slide；Suction side supports lid corresponding cloudy
Male rotor suction location is provided with the air entry 22 axially penetrating through, and suction side supports the bolt hole of the corresponding body 2 of lid to offer axial direction
The bolt hole running through.
Described air-breathing side end cap 12 is made up of flange chassis and end cap, corresponding air-breathing adapter 11 position be provided with suction hole and with
Air-breathing adapter 11 is welded to connect, and supports lid 16 and body 2 by air-breathing bolt of cover 10, suction end cover seal pad and suction side
It is tightly connected.
During assembling, support 6 is welded to connect with body 2, and male rotor 1 and female rotor 3 engage and be axially inserted into placement body 2
Cylinder-bore in, exhaust side support lid 15 male rotor dead eye 7-1 and female rotor dead eye 8-1 groove in place male rotor soft
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,
Exhaust side supports the male rotor dead eye 7-1 and female rotor dead eye 8-1 of lid 15 to be each passed through male rotor main shaft 5 and female rotor master
Axle 4, aerofluxuss side end cap 14 passes through male rotor main shaft 5, and body 2 is passed through exhaust end cover bolt 13, gasket seal and aerofluxuss side
Lid 14, exhaust side support lid 15 to be tightly connected, the steam vent welding vent connection 9 of aerofluxuss side end cap 14；Suction side supports lid 16
Suction side male rotor dead eye 7-2 and suction side female rotor dead eye 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, suction side supports suction side male rotor dead eye 7-2 and the suction side female rotor dead eye of lid 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 support lid 16 to be tightly connected.
As shown in figure 4, when refrigeration compressor runs, motor drives male rotor to turn 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 absorbing vaporizer is by air-breathing adapter 11 He
Air entry 22, enters the interdental spaces of negative and positive rotor, turns over air-breathing aperture air-breathing and terminate, entrance compression process, pressure rise, when
When reaching vent ports, the gas of High Temperature High Pressure entered steam vent and vent connection 9 discharges refrigeration compressor, male rotor flexible column
Shape spring promotes male rotor main shaft 5 through male rotor advance ball, and female rotor flexible columnar spring promotes through female rotor advance ball
Female rotor main shaft 4, makes male rotor 1 and the helical tooth of 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 common skill for the art
For art personnel, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications
Also should be regarded as protection scope of the present invention.
Claims (3)
1. a kind of flex rotor contact sealing Spiral Lobe Refrigeration Compressor it is characterised in that include male rotor, body, female rotor,
Female rotor main shaft, male rotor main shaft, support, male rotor dead eye, female rotor dead eye, vent connection, air-breathing bolt of cover, suction
Gas adapter, air-breathing side end cap, exhaust end cover bolt, aerofluxuss side end cap, exhaust side support lid, suction side to support lid, air vent, sun
Rotor flexibility column spring, male rotor advance ball, female rotor flexible columnar spring, female rotor advance ball and air entry；Institute
Stating exhaust side supports the corresponding male rotor main shaft of lid, the position of female rotor main shaft to offer the male rotor dead eye axially penetrating through respectively
With female rotor dead eye, male rotor dead eye radially offers male rotor groove, is placed with male rotor flexible in male rotor groove
Column spring, fitted with male rotor groove in one end of male rotor flexible columnar spring, the other end of male rotor flexible columnar spring
It is placed with male rotor advance ball, the external diameter of male rotor advance ball is more than the internal diameter of male rotor flexible columnar spring, male rotor is slided
Dynamic ball slides relative to male rotor groove, and female rotor dead eye radially offers female rotor groove, is placed with female rotor groove
Female rotor flexible columnar spring, fitted with female rotor groove in one end of female rotor flexible columnar spring, female rotor flexible columnar bullet
The other end of spring is placed with female rotor advance ball, and the external diameter of female rotor advance ball is more than the interior of female rotor flexible columnar spring
Footpath, female rotor advance ball slides relative to female rotor groove；Exhaust side supports the corresponding yin, yang rotor exhaust position of lid to be provided with axial direction
The air vent running through, exhaust side supports the bolt hole of the corresponding body of lid to offer the bolt hole axially penetrating through；Described aerofluxuss side
The corresponding exhaust side of lid supports the vent position of lid to be provided with steam vent, and steam vent is welded to connect with vent connection, aerofluxuss side
The corresponding exhaust side of lid supports the male rotor bearing hole site of lid to offer the dead eye running through；The axial two ends of described male rotor with
Male rotor main shaft is simultaneously structure as a whole, and the axial two ends of female rotor with female rotor main shaft and are structure as a whole, and male rotor has four
Helical tooth, female rotor has six helical tooths, and the helical tooth of male rotor and female rotor has multiple spaces contact point, male rotor vertically
Engage with female rotor and be axially inserted in the cylinder-bore placing body, support is welded to connect with body；Described suction side supports
The corresponding male rotor main shaft of lid, the position of female rotor main shaft offer the suction side male rotor dead eye axially penetrating through and suction side is cloudy
Armature spindle bearing bore, suction side male rotor dead eye radially offers suction side male rotor groove, in suction side male rotor groove
It is placed with suction side male rotor flexible columnar spring, one end of suction side male rotor flexible columnar spring and suction side male rotor groove
Laminating, 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 is slided
The external diameter of dynamic ball is more than the internal diameter of suction side male rotor flexible columnar spring, and suction side male rotor advance ball is relative to suction side
Male rotor groove slides, and suction side female rotor dead eye radially offers suction side female rotor groove, and suction side female rotor is recessed
It is placed with suction side female rotor flexible columnar spring, one end of suction side female rotor flexible columnar spring and suction side female rotor in groove
Groove is fitted, and the other end of suction side female rotor flexible columnar spring is placed with suction side female rotor advance ball, and suction side is cloudy to be turned
The external diameter of sub- advance ball is more than the internal diameter of suction side female rotor flexible columnar spring, and suction side female rotor advance ball is inhaled relatively
Gas side female rotor groove slides；Suction side supports the corresponding yin, yang rotor suction position of lid to be provided with the air entry axially penetrating through, air-breathing
The bolt hole that collateral support lid corresponds to body offers the bolt hole axially penetrating through.
2. the Spiral Lobe Refrigeration Compressor of flex rotor according to claim 1 contact sealing is it is characterised in that described air-breathing
Side end cap is made up of flange chassis and end cap, and air-breathing side end cap corresponding air-breathing adapter position is provided with suction hole, suction hole and air-breathing
Adapter is welded to connect, and supports lid and body to be tightly connected by air-breathing bolt of cover, suction end cover seal pad and suction side.
3. the Spiral Lobe Refrigeration Compressor of flex rotor according to claim 1 contact sealing is it is characterised in that described body
Cover seal is supported to be connected by exhaust end cover bolt, exhaust end cover gasket seal with aerofluxuss side end cap, exhaust side.
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 true CN106351831A (en) | 2017-01-25 |
| CN106351831B 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 |
|---|---|
| CN106351831B (en) | 2018-05-11 |
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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 |
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