CN105927281B - A kind of port mouth structure of single-screw expander - Google Patents
A kind of port mouth structure of single-screw expander Download PDFInfo
- Publication number
- CN105927281B CN105927281B CN201610349773.XA CN201610349773A CN105927281B CN 105927281 B CN105927281 B CN 105927281B CN 201610349773 A CN201610349773 A CN 201610349773A CN 105927281 B CN105927281 B CN 105927281B
- Authority
- CN
- China
- Prior art keywords
- screw
- screw rotor
- air inlet
- section
- line
- 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.)
- Active
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
- F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
- F01C21/18—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 present invention discloses a kind of port mouth structure of single-screw expander, on the basis of the perpendicular bisector of star-wheel and screw rotor, the screw channel of the air inlet section of screw rotor blocks, its axial length is L1p, the screw channel length of the exhaust section of screw rotor keeps complete, it is provided with axial admission aperture on the corresponding casing in the section of the air inlet section of screw rotor, rod radial air vent mouth is provided on the casing of exhaust section.The axial admission aperture on the casing of screw rod air inlet end face is made into radial air inlet aperture on casing by the present invention, eliminates resistance of the centrifugal force to charge air flow.To adapting to the improvement of screw rod inlet end, the screw channel of screw rod exhaust end keeps complete, and rod radial air vent mouth is arranged, and centrifugal force caused by screw rod rotation is reduced or eliminated reduces the inlet and outlet resistance of expanding machine to the inhibition of intake and exhaust, improves overall efficiency.
Description
Technical field
The invention belongs to mechanical design fields, more particularly to a kind of port mouth structure of single-screw expander.
Background technology
Screw expander relies on drive of high-pressure gas, and in expanding machine, drive rotor rotates after high pressure gas expansion, and defeated
Go out power, realization converts heat energy into mechanical energy.The application of screw expander, it will promote low-grade useless in industrial flow
The recycling of the energy such as heat, geothermal energy and solar energy, and electric energy is converted to, alleviate energy shortage and problem of environmental pollution.
Single-screw expander is one kind of screw expander.Compared with twin-screw expander, single-screw expander is not yet
Commercial applications.The reason is that, current single-screw expander both is from the single screw compressor being simply transformed：It will single spiral shell
The vent ports of bar compressor are transformed into the air inlet of expanding machine, and the air inlet of compressor is transformed into the exhaust outlet of expanding machine.
It is this not change machine inner structure, it will only be exchanged into row, gas opening, the mode that reversion compressor becomes expanding machine is simultaneously uncomfortable
Single-screw expander is closed, the efficiency of single-screw expander will be made to reduce.
The main machine structure of single screw compressor is as shown in Figure 1, its core component is a screw rod 4 and two are in therewith
The star-wheel 2 being centrosymmetrically arranged；Star-wheel 2 is set on star-wheel holder 3.Star-wheel tooth, tooth socket and casing 5 form compression chamber, motor
It drives star-wheel 2 to rotate by screw rod 4, realizes air-breathing, compression and exhaust process (label 1 is rotor exhaust steam end).
The matching relationship of single screw compressor star-wheel screw rod is as shown in Figure 2.In the position of triangle vent ports 10 such as Fig. 2
Shown in broken line triangle, the corresponding position that is arranged on casing.In the direction of rotation of screw rod 8 such as figure shown in arrow 9, driving left and right
Two star-wheels 6,7 rotate.Air inlet flow direction is as shown in arrow 10, and screw rod tooth socket is flowed into the angular cut of screw rod air inlet.It was vented
Cheng Zhong is discharged from the radial of screw rod by the triangle vent ports 10 by compressed gas, and exhaust flow direction is as shown in figure arrow 12.
Currently, the relative position of screw rod and star-wheel is as shown in figure 3, arrow 17 is screw rod 15 in figure in single-screw expander
Direction of rotation, driving left and right two star-wheel 13,14 rotate.Broken line triangle 16 is the triangle inlet channel of expanding machine in figure,
Arrow 18 is the airflow direction of air inlet.In the discharge directions of expanding machine such as figure shown in arrow 19.The flowing side of fluid in expanding machine
To just opposite with the gas flow direction in compressor.Expanding gas need to enter expansion chamber from this triangular orifice.Due to
The flow direction of expanding gas needs centrifugal force caused by overcoming screw motion that could enter expansion chamber, and the flowing of fluid is caused to hinder
Power increases；Since the resistance is directly proportional to the density of fluid, into expansion chamber before resistance can be caused big containing liquid in fluid
It is big to increase, to more reduce efficiency of expander；To ensure that the resistance does not increase, usually enter expansion chamber in expanding gas, and
Expansion chamber is rotated with screw rod be detached from this triangular orifice after just spray into liquid (such as lubricating oil) and be sealed, this causes expanding
Chamber a large amount of gas leakage before being detached from triangular orifice, reduces the efficiency of expanding machine.
In the prior art, the size relationship of the screw rod 20 and star-wheel 21 of single-screw expander, as shown in Figure 4.Screw rod 20 with
The centre-to-centre spacing of star-wheel 21 is A, a diameter of d1 of screw rod, a diameter of d2 of star-wheel.By star-wheel, screw shaft perpendicular bisector on the basis of,
The screw channel axial length of screw rod inlet end is L1, and the screw channel axial length of exhaust end is L2.The length of L1 is represented by：
And L2 is then less than L1, usual L2=(0.6~0.8) L1.
The induction port of above-mentioned single-screw expander is opened in radial direction, and the inflow direction of charge air flow is with it by because of screw rod
Centrifugation force direction is on the contrary, cause intake resistance to increase caused by rotation.
Invention content
The purpose of the present invention is to provide a kind of port mouth structures of single-screw expander, screw rod is reduced or eliminated
Centrifugal force caused by rotation reduces the inlet and outlet resistance of expanding machine to the inhibition of intake and exhaust, improves overall efficiency.
To achieve the goals above, the present invention adopts the following technical scheme that：
A kind of port mouth structure of single-screw expander, on the basis of the perpendicular bisector of star-wheel and screw rotor, screw rod
The screw channel of the air inlet section of rotor blocks, and the air inlet section axial length of the screw rotor after blocking is L1p, the exhaust section of screw rotor
Screw channel length keep complete, be provided with axial admission aperture on the corresponding casing in the section of the air inlet section of screw rotor,
Rod radial air vent mouth is provided on the casing of exhaust section；The screw channel axial length L 1p of screw rotor air inlet section is：
Wherein, d1 is the diameter of screw rotor, and d2 is the star-wheel diameter engaged with screw rotor, and A is the axis of screw rotor
Vertical range of the line to star-wheel axis.
Further, the section of the air inlet section of screw rotor is the air inlet end face of screw rotor, the air inlet of screw rotor
It is set on the air inlet end face of screw rotor；The exhaust outlet of screw rotor is set on the side of screw rotor.
Further, along screw rotor axial direction, in the air inlet end face of screw rotor it can be seen that the tooth socket of screw rotor；
The exhaust end face of screw rotor can not see the tooth socket of screw rotor.
Further, bottom boundaries of the inboard boundary of induction port with the tooth socket of screw rotor in air inlet end face overlap；Into
Distance is h between the rear side boundary and the divisional plane of expanding machine of gas opening；The outer side edges boundary line of induction port and screw rotor
Border line overlaps；The front side boundary of induction port is identical in the rear side section line molded line of air inlet end face as tooth socket, be tooth socket just
The location of rear side section line at the end of air inlet.
Further, bottom boundaries of the inboard boundary of induction port with the tooth socket of screw rotor in air inlet end face overlap；Into
Distance is h between the rear side boundary and the divisional plane of expanding machine of gas opening；The outer side edges boundary line of induction port and screw rotor
Border line overlaps；The front side boundary of induction port is straight line or curve, and rear side of the position with tooth socket in air inlet end face is cut
The coincidence or misaligned of upper thread molded line.
Further, h is more than zero.
Further, on the corresponding casing in screw rotor inlet end face, in addition to induction port, axis hole, it is provided with sealing
Plane and star-wheel space, the sealing plane ensure sealing with the cooperation of screw rotor air inlet end face；Star-wheel space is for installing star-wheel.
Further, the boundary of vent ports is identical as the front side boundary line molded line of tooth socket outer rim of screw rotor.
Further, the boundary of vent ports is straight line or curve, the front side of the tooth socket outer rim of position and screw rotor
Boundary line molded line coincidence or misaligned.
Further, there are two axial admission apertures for center symmetric setting on casing；Center symmetric setting has two on casing
A rod radial air vent mouth.
Compared with the existing technology, the invention has the advantages that：
The induction port of expanding machine is opened in the air inlet end face of screw rotor in the present invention, and charge air flow is not rotated by screw rod
The influence of caused centrifugal force ensures sealing so as to be mixed into liquid (including lubricating oil) in charge air flow, can also incite somebody to action
Expanding machine is expanded for two-phase, and maintains smaller intake resistance.It is finally reached the purpose for improving efficiency of expander.
Description of the drawings
Fig. 1 is single screw compressor basic block diagram；
Fig. 2 is cooperation and the movement relation schematic diagram of single helical-lobe compressor intermeshing pair screw rod and star-wheel；
Fig. 3 is cooperation and the movement relation schematic diagram that existing single-screw expander engages sub-screw and star-wheel；
Fig. 4 is the size and matching relationship schematic diagram of existing single-screw expander screw rod and star-wheel；
Fig. 5 is the relative position relation schematic diagram of single-screw expander star-wheel of the present invention and screw rod；
Fig. 6 is the air inlet end view of screw rod of the present invention；
Fig. 7 is perspective view of the vent ports on screw rod air inlet end face on casing of the present invention；
Fig. 8 is perspective view of the corresponding casing in screw rod inlet end of the present invention face in screw rod air inlet end face；
Fig. 9 is perspective view of the rod radial air vent mouth boundary on screw rod vertical view on casing of the present invention.
Specific implementation mode
The axial admission aperture on the casing of screw rod air inlet end face is made into radial air inlet aperture on casing by the present invention, eliminates
Resistance of the centrifugal force to charge air flow.To adapting to the improvement of screw rod inlet end, the screw channel of screw rod exhaust end keeps complete, and is arranged
Rod radial air vent mouth.
It please refers to shown in Fig. 5, a kind of port mouth structure of single-screw expander of the present invention, with star-wheel 21, screw rod 20
Axis perpendicular bisector on the basis of, the screw channel of screw rod inlet end clips one section, and inlet end screw channel axial length is changed into L1p by L1,
And screw rod exhaust end screw channel is then kept completely, axial length L 2p=L1.L1p=(0.5~0.95) L1.Specific numerical value root
It is selected according to capacity.
Screw rod inlet end is as shown in Figure 6.In terms of air inlet end-view, the rotation direction of main shaft 23 is as shown in figure arrow 26, end
Face can see that tooth socket 22, and tooth socket front side section line is as shown in the reference numeral 24, and section line is as shown in figure grade 25 on rear side of tooth socket, slot bottom
Section line is as shown in the reference numeral 28.As screw rod inlet end length L1p becomes smaller, the capacity of expanding machine becomes smaller, slot bottom section line institute
To also it become smaller in round radius.
The inlet channel of expanding machine is opened in the ground plane coordinated with screw rod air inlet end face, and induction port 29 is in screw rod
The projection of air inlet end face is as shown in the shadow regions Fig. 7.Because a screw rod and two star-wheels are centrosymmetric arrangement, expansion chamber is in spiral shell
It is also symmetrical on bar, so the symmetric position in screw rod air inlet end face, there are one identical induction ports 30 for arrangement.Into
The inboard boundary 35 of gas opening 29 is overlapped with screw slot bottom boundaries 28.The segmentation on the rear side boundary 33 and expanding machine of induction port 29
The plane of screw rotor center line and star-wheel central axis (is passed through in face 34.) between distance be h.The distance and casing thickness phase
It is same or close.The outer side edges boundary line 31 of induction port 29 is overlapped with the border line 27 of screw rod.The front side boundary 32 of induction port 29
It is identical in 25 molded line of rear side section line of air inlet end section as tooth socket, it is at the end of tooth socket just air inlet residing for rear side section line 25
Position.The size of induction port 29 is determined by its front side boundary 32.Front side boundary 32 is remoter from rear side boundary 33, induction port
29 is bigger, and air inflow is bigger, and the expansion ratio of expanding machine is smaller.The position on front side boundary 32 is determined according to expansion ratio.
Other regions except axis hole and induction port position are provided with the inlet end of planar end and screw rod on casing
Face coordinates, and seals, and beats the region 36 of hatching as shown in Figure 8.Region 37,38 is that the reserved star-wheel on casing is empty
Between.To ensure the capacity of expanding machine, region 37 and 38 should be as narrow as possible, only needs that star-wheel can be packed into.
To be adapted to induction port, the exhaust end of screw rod keeps screw channel complete, and the vent ports of expanding machine are arranged in
The radial direction of casing.Screw rod made by boundary 40 projectable to the direction shown in arrow 39 along Fig. 8 of the rod radial air vent mouth
View on, as shown in Figure 9.On casing, this side all areas from the boundary of vent ports 40 to screw rod exhaust end are respectively provided with
For vent ports.Because of the symmetrical configuration of single-screw expander, the symmetric position on casing is additionally provided with an identical gas vent
Mouthful.The boundary 40 of the vent ports is identical as 41 molded line of front side boundary line of screw rod tooth socket outer rim, the boundary 40 of vent ports
Position is tooth socket in just (in Fig. 9, label 42 is screw rod tooth for the location of expansion moment tooth socket front side boundary line 41 completely
The rear side boundary line of slot outer rim, label 43 are screw rod direction of rotation).
Using the above scheme, the induction port of expanding machine is opened in the air inlet end face of screw rod to the present invention, charge air flow not by
The influence of centrifugal force caused by screw rod rotation ensures sealing so as to be mixed into liquid (including lubricating oil) in charge air flow,
Expanding machine can also be expanded for two-phase, and maintains smaller intake resistance.It is finally reached the purpose for improving efficiency of expander.
Claims (9)
1. a kind of port mouth structure of single-screw expander, which is characterized in that the perpendicular bisector with star-wheel and screw rotor is
The screw channel of benchmark, the air inlet section of screw rotor blocks, and the air inlet section axial length of the screw rotor after blocking is L1p, and screw rod turns
The screw channel length of the exhaust section of son keeps complete, be provided on the corresponding casing in the section of the air inlet section of screw rotor it is axial into
Gas opening is provided with rod radial air vent mouth on the casing of exhaust section；The screw channel axial length L 1p of screw rotor air inlet section is：
Wherein, d1 is the diameter of screw rotor, and d2 is the star-wheel diameter engaged with screw rotor, and A is that the axis of screw rotor arrives
The vertical range of star-wheel axis.
2. a kind of port mouth structure of single-screw expander according to claim 1, which is characterized in that screw rotor
Air inlet section section be screw rotor air inlet end face, the air inlet of screw rotor is set to the air inlet end face of screw rotor
On；The exhaust outlet of screw rotor is set on the side of screw rotor.
3. a kind of port mouth structure of single-screw expander according to claim 1, which is characterized in that induction port
Bottom boundaries of the inboard boundary with the tooth socket of screw rotor in air inlet end face overlap；The rear side boundary of induction port and expanding machine
Distance is h between divisional plane；The outer side edges boundary line of induction port is overlapped with the border line of screw rotor；The front side edge of induction port
Boundary is identical in the rear side section line molded line of air inlet end face as tooth socket, is the position at the end of tooth socket just air inlet residing for rear side section line
It sets；The divisional plane is the plane by screw rotor center line and star-wheel central axis.
4. a kind of port mouth structure of single-screw expander according to claim 1, which is characterized in that induction port
Bottom boundaries of the inboard boundary with the tooth socket of screw rotor in air inlet end face overlap；The rear side boundary of induction port and expanding machine
Distance is h between divisional plane；The outer side edges boundary line of induction port is overlapped with the border line of screw rotor；The front side edge of induction port
Boundary is straight line or curve, and rear side section line molded line of the position with tooth socket in air inlet end face overlaps or misaligned；Described point
Face is the plane by screw rotor center line and star-wheel central axis.
5. a kind of port mouth structure of single-screw expander according to claim 3 or 4, which is characterized in that h is more than
Zero.
6. a kind of port mouth structure of single-screw expander according to any one of claim 1 to 4, feature exist
In, on the corresponding casing in screw rotor inlet end face, in addition to induction port, axis hole, it is provided with sealing plane and star-wheel space,
The sealing plane ensures sealing with the cooperation of screw rotor air inlet end face；Star-wheel space is for installing star-wheel.
7. a kind of port mouth structure of single-screw expander according to claim 1, which is characterized in that vent ports
Boundary it is identical as the front side boundary line molded line of tooth socket outer rim of screw rotor.
8. a kind of port mouth structure of single-screw expander according to claim 1, which is characterized in that vent ports
Boundary be straight line or curve, position overlaps or misaligned with the front side boundary line molded line of the tooth socket outer rim of screw rotor.
9. a kind of port mouth structure of single-screw expander according to claim 1, which is characterized in that on casing
The heart is arranged symmetrically, and there are two axial admission apertures；There are two rod radial air vent mouths for center symmetric setting on casing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610349773.XA CN105927281B (en) | 2016-05-24 | 2016-05-24 | A kind of port mouth structure of single-screw expander |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610349773.XA CN105927281B (en) | 2016-05-24 | 2016-05-24 | A kind of port mouth structure of single-screw expander |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105927281A CN105927281A (en) | 2016-09-07 |
| CN105927281B true CN105927281B (en) | 2018-08-10 |
Family
ID=56841139
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610349773.XA Active CN105927281B (en) | 2016-05-24 | 2016-05-24 | A kind of port mouth structure of single-screw expander |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105927281B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2449705A1 (en) * | 1974-10-18 | 1976-04-22 | Omphale Sa | Multi-start worm screw compressor or expansion engine - has sealing gear wheel with tooth flanks on low, longer than on high pressure side |
| US5087182A (en) * | 1989-09-12 | 1992-02-11 | Bernard Zimmern | Casing construction for screw compression/expansion machines |
| CN201284741Y (en) * | 2008-11-07 | 2009-08-05 | 徐道敏 | Meshing structure of single-screw meshing pair |
| CN201461864U (en) * | 2009-06-25 | 2010-05-12 | 上海孚创螺杆技术有限公司 | Single-worm engaging mechanism with reducing generatrix secondary envelope single-worm molded line |
| CN201747600U (en) * | 2010-07-29 | 2011-02-16 | 深圳市亚普精密机械有限公司 | Single-screw compressor with small specific power |
| CN203867621U (en) * | 2014-05-29 | 2014-10-08 | 扬州大学 | Power adjustable single screw rod expansion machine |
-
2016
- 2016-05-24 CN CN201610349773.XA patent/CN105927281B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2449705A1 (en) * | 1974-10-18 | 1976-04-22 | Omphale Sa | Multi-start worm screw compressor or expansion engine - has sealing gear wheel with tooth flanks on low, longer than on high pressure side |
| US5087182A (en) * | 1989-09-12 | 1992-02-11 | Bernard Zimmern | Casing construction for screw compression/expansion machines |
| CN201284741Y (en) * | 2008-11-07 | 2009-08-05 | 徐道敏 | Meshing structure of single-screw meshing pair |
| CN201461864U (en) * | 2009-06-25 | 2010-05-12 | 上海孚创螺杆技术有限公司 | Single-worm engaging mechanism with reducing generatrix secondary envelope single-worm molded line |
| CN201747600U (en) * | 2010-07-29 | 2011-02-16 | 深圳市亚普精密机械有限公司 | Single-screw compressor with small specific power |
| CN203867621U (en) * | 2014-05-29 | 2014-10-08 | 扬州大学 | Power adjustable single screw rod expansion machine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105927281A (en) | 2016-09-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103306979A (en) | Electronic vacuum pump for new energy vehicle brake vacuum booster | |
| CN106329831A (en) | Permanent-magnet synchronous motor cooling structure | |
| CN205977708U (en) | Injection formula is from inhaling charge pump | |
| CN105927281B (en) | A kind of port mouth structure of single-screw expander | |
| CN105065281B (en) | Multi-exhaust-pressure screw type compressor | |
| CN207033735U (en) | Compressor and there is its refrigerating plant | |
| CN109474128A (en) | A kind of motor stand alone type cooling circuit system and manufacturing method | |
| CN109653813B (en) | A kind of variable geometry turbine cold air flow circuit structure | |
| CN208816329U (en) | A kind of compressor and air-conditioning | |
| CN217712955U (en) | Roots vacuum pump rotor and vacuum pump for inhibiting radial leakage | |
| CN208090812U (en) | A kind of through-flow fan blade, refrigerant connector, fan blade component, cross flow fan and air-conditioning | |
| CN207033734U (en) | Compressor and there is its refrigerating plant | |
| CN206860443U (en) | Lid sealing and lid sealing assembly, compressor for compressor | |
| CN107120279A (en) | Compressor and the refrigerating plant with it | |
| CN206860442U (en) | Lid sealing and lid sealing assembly, compressor for compressor | |
| US9528516B2 (en) | Compressor having outlet with gap to enhance volumetric efficiency | |
| CN207033732U (en) | Compressor and there is its refrigerating plant | |
| CN208010594U (en) | Compressor and air conditioner | |
| CN105840512A (en) | Efficient heat dissipation type rotary-vane vacuum pump system | |
| CN108131167A (en) | A kind of centrifugal single screw compressor or expanding machine | |
| CN205654538U (en) | High -efficient heat dissipation formula rotary -vane vacuum pump system | |
| CN212959107U (en) | Pump body subassembly and compressor | |
| CN206360723U (en) | Power set and air motor | |
| CN206329493U (en) | A kind of rotor molded line of screw vacuum pump | |
| CN103470503B (en) | Axial bypass regulates the sliding vane refrigeration compressor of displacement |
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 |