EP0042027A1 - Schraubenexpansionsmaschine - Google Patents

Schraubenexpansionsmaschine Download PDF

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Publication number
EP0042027A1
EP0042027A1 EP81100882A EP81100882A EP0042027A1 EP 0042027 A1 EP0042027 A1 EP 0042027A1 EP 81100882 A EP81100882 A EP 81100882A EP 81100882 A EP81100882 A EP 81100882A EP 0042027 A1 EP0042027 A1 EP 0042027A1
Authority
EP
European Patent Office
Prior art keywords
rotor
control plates
screw
expansion
opening
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.)
Ceased
Application number
EP81100882A
Other languages
German (de)
English (en)
French (fr)
Inventor
Heiko Dr.-Ing. Sandstede
Peter Dr.-Ing. Vinz
Knut Prof. Dr.-Ing. Kauder
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MAN Gutehoffnungshutte GmbH
Original Assignee
MAN Gutehoffnungshutte GmbH
MAN Maschinenfabrik Augsburg Nuernberg AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by MAN Gutehoffnungshutte GmbH, MAN Maschinenfabrik Augsburg Nuernberg AG filed Critical MAN Gutehoffnungshutte GmbH
Publication of EP0042027A1 publication Critical patent/EP0042027A1/de
Ceased legal-status Critical Current

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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
    • F01C20/00—Control of, monitoring of, or safety arrangements for, machines or engines
    • F01C20/10—Control of, monitoring of, or safety arrangements for, machines or engines characterised by changing the positions of the inlet or outlet openings with respect to the working chamber
    • F01C20/14—Control of, monitoring of, or safety arrangements for, machines or engines characterised by changing the positions of the inlet or outlet openings with respect to the working chamber using rotating valves

Definitions

  • the invention relates to a screw expansion machine with two axially parallel rotors, the intermeshing teeth and tooth gaps of the screw threads form expansion spaces which increase in volume during rotation.
  • the spaces are successively filled to a certain volume with a working medium through inlet openings, which are arranged in the housing wall part, which otherwise almost touches the rotor end faces. This medium expands, and after passing the control edges arranged on the housing circumference, the expansion space opens to the outlet channel.
  • Screw expansion machines of the marked type work with the same functional structure as screw compressors, but with the difference that a medium with increased pressure and temperature enters the pressure channel, releases part of its energy as technical work during expansion in the tooth space and then exits.
  • the object of the invention is to provide screw expansion machines which, even in the part-load range, have the most constant possible efficiency, are easy to control and yet do not require excessively large construction costs. It should be possible to use a single-stage machine arrangement to cover as large a range as possible for changed operating conditions to be able to cover, the above-mentioned processes for energy conversion should be given.
  • a movable adjusting device is provided on the pressure-side end wall of the rotor housing, with which the position of the controlling edges of the inlet opening or the angular range in which the pressure channel with the through Teeth and tooth gaps formed expansion space is connected, its position and / or extent in the circumferential direction of the rotors can be changed.
  • two control slides movable relative to one another are suitable for the actuating device, each of which is assigned to a rotor, through which the contour of the inlet opening can be changed in the pressure-side end wall.
  • an adjusting device of the control slide is selected, in which the adjustment movement of the control slide is adapted to the kinematics of the rotor, which results from the ratio of the number of teeth of the two rotor.
  • the ratio of the setting angles is selected to be 2: 8, ie the slide located in front of the main rotor opens at an angle to the slide of the secondary rotor, which corresponds to a ratio of 2: 8.
  • control spools are coupled by a spur gear pair selected in accordance with the number of teeth ratio of the rotors, so that the edges / edges of the spools which determine the filling end of the expansion space carry out adjustment paths or angles corresponding to this ratio.
  • FIG. 1 and 2 show a screw expansion machine 1 in which the main rotor ("male rotor") 2 is provided with essentially convex, helically arranged ribs 3, which interact with the grooves 4 of a secondary rotor (“female rotor”) 5 which is essentially concave, likewise helically arranged ribs is equipped.
  • the runners 2, 5 are located in a housing 6 which encloses a working space which is formed by the intersecting bores for the runners lying in the axial direction.
  • the working space is delimited by the housing end walls 9, 10, which simultaneously seal it against the ends of the rotors 2, 5 with the aid of a fluid sealant.
  • one inlet and one outlet channel 11, 12 are provided, which are connected to a high-pressure and low-pressure channel.
  • the main and secondary rotors are mounted in such a way that they touch in the pitch circle and mesh like two helical gears.
  • the main rotor 2 is also provided with a shaft journal 18 which drives a device, not shown, which is arranged outside the expansion machine.
  • the machine is stored, lubricated and cooled in the manner known for screw compressors, which is familiar to the person skilled in the art in this field.
  • adjustable closing members are provided in the housing end wall 10 on the high-pressure side (FIGS. 3 and 4).
  • FIGS. 3 and 4 show a section along the line III ... III in Figure 1, the parts of the housing are shown in simplified form.
  • the housing wall has the shape of an "8".
  • the secondary runner 5 designated NL
  • the main runner 2 designated HL
  • FIGS. 3 and 4 one looks in front of the runner face, the face contour of the ribs, depending on their covering by the closing elements, being shown partly in dashed lines and partly in solid lines.
  • the spool valves have the shape of circular disks with an axis cutout and a further cutout on the edge, the contour of which depends on the tooth flank contour, with essentially the largest and the smallest possible input cross section being limited with respect to the end wall of the rotor.
  • the closing members not only assume a start and end position, but also continuously change the channel control edges of the inlet from position to position, which is located in the figure in the upper part of the constriction of the "8".
  • control slides 20, 22 are two incomplete circular ring disks which can be rotated simultaneously but mutually.
  • the cutout cut into the circular rings lies in the area of a guide block 30 projecting between the axes. In their extreme positions, the cutout edges of the control slides touch the outer flanks of the guide block.
  • the cut-out edge 21 begins at the top with a contour that corresponds to the flank of the rotor teeth 3 behind it and approximately in the normal direction up to the circular contour 21 ′ runs. After an angle of 120 °, the edge again runs outward, describing an angular section and then an arc part 21 ′′, which in turn is selected to match the outer arc contour of the control slide 22 which can be rotated in the same plane.
  • the contour of the cut-out edge 23 is also visible in the “open” state (FIG. 3).
  • the edge is shaped in such a way that it follows the contour of the flank of the tooth 5 lying behind it, with a curvature which deviates outwards from the normal direction.
  • a certain sector angle - in the present exemplary embodiment of approximately 160 ° - a second edge 23 'is provided, which is also curved and in adaptation to the guide block 30. has formed a small pointed projection 24.
  • the opening of the cutout in both rotary valves results from the choice of the smallest volume ratios between the inlet and outlet of the expansion machine, i.e. H. by choosing the widest opening of the slide. It should also be noted that only the free cross section resulting above the axes corresponding to the arrangement of the access line 11 serves as the inlet opening.
  • the control slides 20, 22 are provided on their lower outer edge, starting from the beginning of the cut-out edge 21 or 23, with toothing 25, 26 which extends over part of the circumference and mesh with pinions 27, 28 arranged in the lower vertex. These pinions are in turn coaxially connected to two gear wheels 34, 35 which, as shown in FIG. 5, are arranged in a different plane. Via a rotary knob 37, which is connected to a pinion 38 via a shaft, the gearwheel 34 is adjusted, which in turn meshes with the larger-sized gearwheel 35.
  • the slide valve 20 of the main rotor is rotated more slowly than the slide valve 22 of the secondary rotor.
  • the areas of the control slide designated with the angles and are fixed in a certain relationship to one another, depending on the circumference of the gear wheels 34, 35 to one another. This arbitrarily too Choosing adjustment with the help of gears or other machine elements, resulting in a fixed ratio of the opening angle of the two spools, is an essential feature of the invention.
  • the spools 20, 22 can, as indicated by arrows, be moved in both directions of rotation, whereby Figure 4 shows the minimum and Figure 3 the maximum opening.
  • the slide plates are made as thin disks, which are mounted around the rotor axes, and the cutouts shown in the figures are very carefully milled.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Rotary Pumps (AREA)
  • Rotary-Type Compressors (AREA)
EP81100882A 1980-06-13 1981-02-07 Schraubenexpansionsmaschine Ceased EP0042027A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19803022202 DE3022202A1 (de) 1980-06-13 1980-06-13 Schraubenexpansionsmaschine
DE3022202 1980-06-13

Publications (1)

Publication Number Publication Date
EP0042027A1 true EP0042027A1 (de) 1981-12-23

Family

ID=6104541

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81100882A Ceased EP0042027A1 (de) 1980-06-13 1981-02-07 Schraubenexpansionsmaschine

Country Status (6)

Country Link
EP (1) EP0042027A1 (enrdf_load_stackoverflow)
JP (1) JPS5716201A (enrdf_load_stackoverflow)
AR (1) AR225674A1 (enrdf_load_stackoverflow)
AU (1) AU6938581A (enrdf_load_stackoverflow)
BR (1) BR8103672A (enrdf_load_stackoverflow)
DE (1) DE3022202A1 (enrdf_load_stackoverflow)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2233041A (en) * 1989-06-17 1991-01-02 Fleming Thermodynamics Ltd Screw expander/compressor
GB2438034A (en) * 2006-05-10 2007-11-14 Grasso Gmbh Screw Compressors with rotor spacer for high input power
DE102011121274A1 (de) 2011-02-10 2012-08-16 Gea Grasso Gmbh Vorrichtung und Anordnung mit Schraubenmotor
CN107387169A (zh) * 2017-08-16 2017-11-24 无锡锡压压缩机有限公司 一种两级螺杆膨胀机级间加热结构
CN107461221A (zh) * 2017-08-16 2017-12-12 无锡锡压压缩机有限公司 一种大功率柴油机余热回收用两级螺杆膨胀机结构
CN112228341A (zh) * 2020-11-18 2021-01-15 广东温博节能环保科技有限公司 一种具备双进气功能的摆式空压机

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0280702A (ja) * 1987-12-24 1990-03-20 Kangnam Complex Construction Co Ltd 硬質表面層を有する弾性テニスコート
DE102015007552A1 (de) 2015-06-16 2016-12-22 Man Diesel & Turbo Se Schraubenmaschine und Verfahren zum Betreiben derselben

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB316670A (en) * 1928-08-02 1931-01-22 Patiag Patentverwertungsund In Rotary piston engine
US2266820A (en) * 1938-07-13 1941-12-23 Frank E Smith Engine
CH326295A (fr) * 1949-01-31 1957-12-15 Dresser Ind Machine volumétrique rotative
FR1258653A (fr) * 1960-06-01 1961-04-14 Svenska Rotor Maskiner Ab Dispositif de réglage du débit pour machine à rotors hélicoïdaux
US3723031A (en) * 1970-11-23 1973-03-27 A Brown Rotary displacement machines

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2656972A (en) * 1949-01-31 1953-10-27 Dresser Ind Adjustable port arrangement for the high-pressure ends of fluid pumps and motors of the rotary screw type
SE427063B (sv) * 1979-06-08 1983-02-28 Stal Refrigeration Ab Kompressor av rotationstyp med varierbart inbyggt volymsforhallande

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB316670A (en) * 1928-08-02 1931-01-22 Patiag Patentverwertungsund In Rotary piston engine
US2266820A (en) * 1938-07-13 1941-12-23 Frank E Smith Engine
CH326295A (fr) * 1949-01-31 1957-12-15 Dresser Ind Machine volumétrique rotative
FR1258653A (fr) * 1960-06-01 1961-04-14 Svenska Rotor Maskiner Ab Dispositif de réglage du débit pour machine à rotors hélicoïdaux
US3723031A (en) * 1970-11-23 1973-03-27 A Brown Rotary displacement machines

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2233041A (en) * 1989-06-17 1991-01-02 Fleming Thermodynamics Ltd Screw expander/compressor
GB2438034A (en) * 2006-05-10 2007-11-14 Grasso Gmbh Screw Compressors with rotor spacer for high input power
US7618248B2 (en) * 2006-05-10 2009-11-17 Grasso Gmbh Refrigeration Technology Screw compressor with intermediate plate
GB2438034B (en) * 2006-05-10 2011-04-06 Grasso Gmbh Refrigeration Technology Screw compressor with rotor spacer for high input power
DE102006021704B4 (de) * 2006-05-10 2018-01-04 Gea Refrigeration Germany Gmbh Schraubenverdichter für große Antriebsleistungen
DE102011121274A1 (de) 2011-02-10 2012-08-16 Gea Grasso Gmbh Vorrichtung und Anordnung mit Schraubenmotor
CN107387169A (zh) * 2017-08-16 2017-11-24 无锡锡压压缩机有限公司 一种两级螺杆膨胀机级间加热结构
CN107461221A (zh) * 2017-08-16 2017-12-12 无锡锡压压缩机有限公司 一种大功率柴油机余热回收用两级螺杆膨胀机结构
CN112228341A (zh) * 2020-11-18 2021-01-15 广东温博节能环保科技有限公司 一种具备双进气功能的摆式空压机

Also Published As

Publication number Publication date
AR225674A1 (es) 1982-04-15
BR8103672A (pt) 1982-03-02
DE3022202C2 (enrdf_load_stackoverflow) 1989-12-07
DE3022202A1 (de) 1982-08-19
AU6938581A (en) 1981-12-17
JPS5716201A (en) 1982-01-27

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Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): BE CH DE FR GB IT

ITCL It: translation for ep claims filed

Representative=s name: BARZANO' E ZANARDO MILANO S.P.A.

17P Request for examination filed

Effective date: 19811110

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: MAN GUTEHOFFNUNGSHUETTE GMBH

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED

18R Application refused

Effective date: 19860707

RIN1 Information on inventor provided before grant (corrected)

Inventor name: KAUDER, KNUT, PROF. DR.-ING.

Inventor name: VINZ, PETER, DR.-ING.

Inventor name: SANDSTEDE, HEIKO, DR.-ING.