EP3204648A1 - Schraubenverdichter - Google Patents
SchraubenverdichterInfo
- Publication number
- EP3204648A1 EP3204648A1 EP15771988.1A EP15771988A EP3204648A1 EP 3204648 A1 EP3204648 A1 EP 3204648A1 EP 15771988 A EP15771988 A EP 15771988A EP 3204648 A1 EP3204648 A1 EP 3204648A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- spool
- screw compressor
- compressor according
- screw
- control slide
- 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
Links
- 238000006073 displacement reaction Methods 0.000 claims abstract description 38
- 230000006835 compression Effects 0.000 claims abstract description 29
- 238000007906 compression Methods 0.000 claims abstract description 29
- 238000011156 evaluation Methods 0.000 claims abstract description 10
- 238000001514 detection method Methods 0.000 claims description 11
- 239000003507 refrigerant Substances 0.000 claims description 8
- 239000002131 composite material Substances 0.000 claims description 6
- 230000002093 peripheral effect Effects 0.000 description 7
- 239000000314 lubricant Substances 0.000 description 4
- 238000005056 compaction Methods 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 3
- 230000004907 flux Effects 0.000 description 3
- 230000010349 pulsation Effects 0.000 description 3
- 238000009423 ventilation Methods 0.000 description 3
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 2
- 150000001875 compounds Chemical group 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
Classifications
-
- 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
- F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
- F04C28/18—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids characterised by varying the volume of the working chamber
- F04C28/20—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids characterised by varying the volume of the working chamber by changing the form of the inner or outer contour of the working chamber
-
- 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
- F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
- F04C28/10—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids characterised by changing the positions of the inlet or outlet openings with respect to the working chamber
- F04C28/12—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids characterised by changing the positions of the inlet or outlet openings with respect to the working chamber using sliding valves
-
- 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
-
- 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
- F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
- F04C28/28—Safety arrangements; Monitoring
-
- 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
- F04C2240/00—Components
- F04C2240/30—Casings or housings
-
- 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
- F04C2240/00—Components
- F04C2240/50—Bearings
- F04C2240/56—Bearing bushings or details thereof
-
- 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
- F04C2240/00—Components
- F04C2240/80—Other components
- F04C2240/81—Sensor, e.g. electronic sensor for control or monitoring
Definitions
- the invention relates to a screw compressor comprising a compressor housing with a screw runner chamber arranged therein, two screw runners arranged in the screw runner space and rotatably mounted on the compressor housing about a screw rotor axis, which engage with their screw contours and cooperate respectively with compression walls adjoining and partially surrounding the same.
- a position detection device for the at least one spool, that the position detection means comprises a coupled to the at least one spool position indicator that the at least one position indicating element with a detector element cooperates, which extends parallel to the direction of displacement of the spool and along which the position indicator is movable when moving the at least one spool, and that the detector element is coupled to an evaluation device which detects the respective position of the position indicator along the detector element.
- a Positionser linears- device is provided for the two spool, which one with the first spool coupled first position indicator and coupled to the second spool second position indicator comprises that both position indicators cooperate with a common detector element which extends parallel to the direction of displacement of the spool and along which the position indicators are movable when moving the spool, and that the detector element with an evaluation coupled, which is the respective
- the detector element is arranged in a running within the compressor housing parallel to the direction of displacement detector channel, so that the detector element by the
- Detector channel inside the compressor housing is optimally protected by external influences.
- the detector channel is closed by a lid, so that over the lid easy access to the
- the detector channel is formed by a groove-like recess formed in a housing base body, which engages over the lid.
- Another advantageous solution provides that the cover itself has a groove-like depression contributing to the detector channel.
- an advantageous solution provides that the detector element can be located within the
- Deepening of the lid extends, so that the detector element is removable together with the lid and optionally interchangeable.
- the at least one position indicator element is arranged in the detector channel and is movable in the latter in the displacement direction.
- the at least one position indicator is mechanically coupled via a connecting body with the respective control slide and thus the position indicator is rigidly carried along with the respective control slide.
- the respective connecting body has an elongate passage between the detector channel and a nozzle
- the respective position indicator element cooperates contactlessly with the detector element, so that the position detection of the position indicator elements can take place wear-free.
- the detector element is made of a magnetostrictive material and the position indicator generates at its location a local magnetic flux of the detector element, which can then be detected via the evaluation circuit in the detector element.
- a particularly favorable solution provides for a control which controls a slide drive for the respective control slide and detects a movement of the respective control slide by means of the position detection unit.
- the controller is able to move not only the respective spool with the slider drive, but also the executed
- the slide drive is realized as a cylinder arrangement that can be acted upon by a medium.
- the control can be used particularly advantageously when the controller positions the respective control slide in a position-controlled manner.
- the controller on the one hand controls the slide drive and on the other hand can detect by detecting the position of the respective spool, whether the desired position is reached or not and then accurately approach this position by appropriate control of the slide drive and, for example, hold permanently.
- Screw rotor Power consumption of a drive motor, parameters of the gaseous medium, in particular of the refrigerant, and operating limits of the screw compressor, the positions of the spool determined.
- first spool and the second spool are arranged in the same direction one behind the other lying.
- two successive control spool are used so that the first spool and the second spool are in a composite position immediately adjacent to each other positionable and movable together in the direction of displacement.
- first and the second spool can be positioned in a release position at a distance from each other to form a gap.
- first spool valve to have adjoining spool compression wall surfaces, one of which faces one of the screw rotors and the second spool valve has spaced-apart compaction wall surface areas, of which, in each case one to one of
- the first spool is mounted on the second spool.
- the first spool is mounted in a slide channel of the second spool.
- the Schieberverdichtungs- wall surfaces of the first spool and the Schieberverdichtungswand- surfaces of the second spool connect to each other.
- the solution according to the invention also sets itself the task in a
- Screw compressor of the type described above to reduce the noise.
- This object is achieved in a screw compressor of the type described above or a screw compressor according to one of the preceding features according to the invention that the first spool and the second spool are arranged in the same direction one behind the other, that the first spool on a high-pressure chamber side facing the second Spool is arranged and that the first spool is guided relative to the second spool by a telescopic guide.
- Slider channel is the mobility of the second spool during operation of the screw compressor according to the invention, in particular reduced during the occurrence of pressure pulsations and thereby reduces the noise formation by the first spool due to pressure pulsations.
- the telescopic guide has a lesser play transversely to the displacement direction than the leadership of the first spool by a receiving this slide channel.
- the mobility of the first spool can be further limited and thus also caused by this in pressure pulsations noise.
- the telescopic guide has a rigidly connected to the second control slide guide body on which the first spool is guided by a guide bush in the direction of displacement movable.
- Such a design of the telescopic guide creates in a particularly simple manner, the possibility of reducing the mobility of the first spool relative to the slide channel.
- a further advantageous solution provides that the first control slide is guided on the guide body exclusively by means of the guide bush.
- the leadership of the first spool can be made more precise relative to the second spool, without the
- Mobility of the first spool to hinder in the direction of displacement Mobility of the first spool to hinder in the direction of displacement.
- the guide bush is arranged on a second spool facing the end of the first spool.
- a particularly expedient solution provides, however, that the guide bush is arranged in the provided in the first spool inner guide receptacle for the guide body.
- the first spool is rigidly connected to a piston rod, which leads to a cylinder assembly for movement of the first spool and that the first spool by means of a piston rod in the direction of displacement movably receiving Guide bush is guided relative to the compressor housing.
- a further complementary guidance of the first spool is provided relative to the compressor housing, which additionally reduces the movement of the first spool relative to the compressor housing and in particular to the slide channel.
- the piston rod is arranged on a side opposite the second spool side of the first spool.
- the piston rod extends parallel to the displacement direction.
- a clearance between the guide bush and the piston rod transverse to the direction of displacement is less than the play of the guided in the slide valve spool transverse to
- first control spool and the second control spool have an identical outer contour.
- the two successive control slide advantageously be used so that the first spool and the second spool are in a composite position immediately adjacent to each other positionable and movable together in the direction of displacement. Further, it is provided in the two successive spools, that the first and the second spool can be positioned in a release position at a distance from each other to form a gap.
- Fig. 1 is a perspective view of a first embodiment of a screw compressor according to the invention
- Fig. 2 is a section along line 2-2 in Fig. 1;
- FIG. 3 shows a section along line 3-3 in the region of a position detecting device
- Fig. 4 is an enlarged section similar to FIG. 2 in the region of
- FIG. 5 shows a representation similar to FIG. 4 at maximum delivery volume and largest volume ratio
- FIG. 6 is a view similar to FIG. 4 at about three quarters of the
- FIG. 7 is a view similar to FIG. 4 at about half
- Fig. 8 is a view similar to Fig. 4 at approximately a quarter of power; an enlarged view of the position detection unit and the position indicators in conjunction with the spool valve; an enlarged perspective view of a position indicating element of the position detecting device; a section similar to FIG. 3 through a second embodiment of a screw compressor according to the invention with mutually arranged spools; a schematic representation of the second embodiment of the screw compressor according to the invention with mutually arranged spools similar to FIG. 4 at the highest volume ratio and highest performance; a representation similar to FIG. 12 at the highest volume ratio and lowest power; a representation similar to FIG. 12 at the lowest volume ratio and highest performance; a section similar to Figure 2 through a third embodiment of a screw compressor according to the invention.
- FIG. 16 and FIG. 18 are sections similar to FIG. 8 through the third embodiment of the spool according to the invention.
- FIG. 1 illustrated embodiment of a screw compressor 10 according to the invention comprises a designated as a whole with 12
- Compressor housing which a suction port 14, via which a to be sucked gaseous medium, in particular refrigerant, is sucked in and a pressure port 16, via which the high pressure
- compressed gaseous medium in particular the refrigerant is discharged, has.
- a screw rotor axis 22, 24 rotatable screw rotor 26, 28 are provided in a screw rotor chamber 18 of the screw contours 32 and 34 engage with each other and with circumferentially adjacent compression walls 36 and 38 of the screw rotor - Collaborate space 18 to receive a supplied to the screw contours 32, 34 adjacent low pressure chamber 42 gaseous medium to compress and deliver it into a high pressure chamber 44 in the compressor housing 12 at high pressure.
- the gaseous medium in particular refrigerant, enclosed in between the screw contours 32, 34 and the compression walls formed at these adjacent Verdichtungswand vom 36, 38 compression chambers at low pressure in a suction and compressed to a final volume at high pressure.
- an adaptation of the operating state of the screw compressor 10 takes place on the one hand with regard to the volume ratio, which indicates the relation between the maximum enclosed intake volume and the ejected final volume. and second, with regard to the compressor capacity, which indicates the proportion of the volume flow actually compressed by the screw compressor relative to the maximum volume flow which can be compressed by the screw compressor 10.
- a first spool 52 and a second spool 54 are arranged one after the other in a spool passage 56 provided in the compressor housing 12, the spool passage 56 being parallel to the screw spindles 22, 24 and the first spool 52 and the second spool 54 in the region of their not on the screw rotor 26, 28 adjacent judgess originatedsfizze 58 leads.
- the first spool 52 is facing the high pressure chamber 44 and thus arranged high pressure side and the second spool 54 is disposed relative to the first spool 52 on the low pressure side.
- Each of the two spools 52 and 54 further includes a spool valve wall 62 contiguous with the screw rotor 26 and a spool valve wall 64 contiguous with the screw rotor 28, which are partial surfaces of the compression panels 36 and 38, and casing compression panels 66 and 68 formed by the compressor housing 12 also Represent sub-areas of the Verdichtungswand inhabit 36 and 38, supplementing the Verdichtungswandx 36 and 38, the
- the first spool 52 and the second spool 54 are, as shown in FIGS. 2 and 4 to 8, configured to be identical insofar as they form the spool compression wall surfaces 62 and 64 and the guide peripheral surface 58, and thus they can be in one parallel to the
- the first spool 52 forms a high pressure chamber 44 facing the final volume of the compression chambers defining outlet edge 82, which by moving the first spool 52 in the
- Displacement direction 72 is displaceable and co-determined by their position relative to a high-pressure side end face 84 of the screw rotor chamber 18, the final volume of the compression chambers formed and thus the volume ratio.
- the first spool 52 and the second spool 54 have facing end surfaces 86 and 88, with which these, as shown for example in FIG. 4 and Fig. 5, are so applied to each other, that the Schieberverdichtungswand vom 62 and 64 of the first spool 52 and the second spool 54 merge into each other.
- first spool 52 and the second spool 54 are guided in addition to the slide channel 56 relative to each other by a telescopic guide 92, which has an inner guide body 94 and a
- Guide receptacle 96 wherein the guide receptacle 96 is provided in the first spool 52 and the guide body 94 is held on the second spool 54 and projects beyond its end face 88 so that it can engage in the guide receptacle 96 in the first spool 52. Further, preferably in a surrounding the guide body 94 interior 102 of the second spool 54 is a compression spring 104th
- a cylinder assembly 112 which comprises a cylinder chamber 114 and a piston 116, wherein the piston 116 is connected to a piston rod 118 which connects to the first spool 52 and produces Although, for example, with an extension 122 of the first spool 52, which is the same, for example, on one of the end face 86 thereof.
- the cylinder arrangement 112 lies in particular on a side of the first control slide 52 opposite the second control slide 54, preferably in a high-pressure-side housing section 124 of FIG
- Compressor housing 12 which is arranged following the slide channel 56 and subsequent to the high-pressure chamber 44 and thus on a side opposite the low-pressure chamber 42 side of the compressor housing 12.
- the second spool 54 is through a cylinder assembly 132nd
- the piston 136 is integrally formed on the second spool 54 and has a piston surface which corresponds at least to the cross-sectional area of the second spool 54.
- the low-pressure side housing portion 142 which receives the cylinder chamber 134 for the cylinder assembly 132 for moving the second spool 54, is located in a region of the compressor housing 12, which is the high-pressure side housing portion 124 arranged to receive the cylinder chamber 114 for the cylinder assembly 112 opposite.
- the first spool 52 and the second spool 54 can be pushed together by the cylinder assemblies 112 and 132 so far that the end faces 86 and 88 abut each other in a composite position, and the two spools 52, 54 can be in the compound position together as a single spool move, which extends from the suction-side end surface 126 in the direction of the pressure-side end surface 84 and the outlet edge 82 contributes to the determination of the volume ratio, wherein, as shown in Fig. 4, the screw compressor 10 always promotes the maximum volume flow in this composite position.
- the volume ratio can be adjusted, which becomes progressively smaller
- the compressor performance ie. the volume flow actually conveyed, in addition vary, takes place, as shown for example in FIG. 6, separating the end faces 86 and 88 by moving the spools 52 and 54 apart into a release position.
- the disconnected position of the second spool 54 is ineffective and thus sets in the disconnected position, the position of the end face 86 of the first spool 52, the initial volume.
- the outlet edge 82 is not in a position in which this specifies the minimum possible final volume, however, the relation of the initial volume, given by the end face 86, to the final volume, defined by the outlet edge 82, is not variable.
- the outlet edge 82 has the minimum distance from the end surface 84 or even beyond this into a retraction space 146 for the high-pressure space 44 the first spool 52 is shifted, a variation of the initial volume 86 is possible without changing the final volume, since this then always remains minimal.
- the second spool 54 thus allows to influence the initial volume by either abutting the end face 88 of the first spool 52 with its end face 88, either to form the composite position of spools 52, 54, thus maximizing the initial volume or with its own end face 88 can be moved far away from the end face 86 of the first spool 52, that no
- position detecting means is provided, which is parallel to the displacement direction 72 of the spool 52, 54 and thus parallel to the screw rotor axes 22, 24 extending Detector element 154, which is able to detect the positions of position indicators 156 and 158.
- the position indicator member 156 is fixedly coupled to the first spool 52, with an adjoining the end face 86 end portion 162 of the first spool 52, and the position indicator 158 is coupled to the second spool 54, with a to the end face 88 subsequent end portion 164 thereof, as shown in particular in Fig. 9.
- each of these position indicators 156 and 158 includes a fork body, generally designated 174, which has its two fork legs 176 and 178 located therebetween
- Each of these fork bodies 174 is coupled to the corresponding control slide 52, 54 via a connecting body 172 connected to the respective end region 162 or 164.
- the fork legs 176 and 178 carry magnets 184 and 186, whose magnetic field flows through the detector element 154 at the location of the magnets 184, 186.
- the detector element 154 is formed from a magnetostrictive material, so that the respective location 188 of the magnetic flux of the detector element 154 can be determined by the magnets 184, 186 by means of an evaluation device designated as a whole by 192, wherein the
- Evaluation device 192 for example, in the magnetostrictive detector element 154 generates sound waves which are connected to the magnetic fields of the Magnets 184, 186 flooded places 188 undergo a back reflection, so that the evaluation device 192, the position of the locations 188 in which the magnetic flux of the magnetostrictive detector element 154 takes place, due to the duration of the reflected sound waves can determine.
- the connecting bodies 172 which are held at the respective end portions 162, 164 of the spools 52, 54, pass through an elongate, slit-shaped passage 194, which is formed in a housing wall 196 forming the slide channel 56 and has a length which is complete in the disconnected position Retraction of the second spool 54 in the retraction 148 and a position of the first spool 52 at a minimum initial volume, ie a position corresponding to FIG. 8, and a position of the first spool 52 at minimum volume ratio, that is maximum distance of the outlet edge 82 of the pressure side
- End face 84 and also allows in the compound position, a position of the second spool 54 with the first spool 52 at maximum volume ratio and minimum volume ratio.
- Spool valve 52 or 54 connected connecting body 172 forms together with the slot-shaped passage 194 a rotation for the respective spool 52, 54 similar to a guide by a sliding block and a groove, so that eliminates the need to provide in the spools 52, 54 grooves, which cooperate with protruding into the slide channel 56 nuts.
- the passage 194 is always maintained at the pressure in the low-pressure chamber 42 and thus also serves to hold the spool 52, 54 with its guide circumferential surface 58 in abutment with the slide channel 56, so that the spool 52, 54 not by itself between the Slider channel 56 and the guide peripheral surface 58 forming high pressure with the Schieber- compacting panels 62, 64 can press against the screw rotor 26, 28.
- a sealing of the passage 194 against higher pressures, in particular also high pressure, takes place through the narrow tolerable gap between the slide channel 56 and the guide circumferential surface 58 of the spool 52, 54th
- a depression 204 is provided on a side of a wall 196 of a housing base 198 opposite the slide channel 56, which is covered with a cover 212, which in turn has a recess 214 facing the depression 204, so that the recesses 204 and 214
- Displacement direction 72 extending elongated detector channel 216 form, in which on the one hand, the detector element 154 extends and in which the fork body 174 are movable on the other hand, with their fork legs 176, 178 surround the detector element 154 on both sides and the magnets 184, 186 position such that their magnetic field the detector element 154 is flooded at a particular location 188.
- the lid 212 is formed so that in the recess 214, the detector element 154 is located so that the detector element 154 together with the evaluation 192 held exclusively on the cover 212 and is removable with this, while the fork body 174 in the detector channel 216, in particular both in the recess 198 and in the recess 204, extend.
- a controller 218 is provided which, through the connection with the position detecting means 152, is able to detect the actual positions of the spools 52, 54 , With the controller 218, as shown in FIG. 1 and 2, the cylinder assemblies 112 and 132 are controllable to position the spools 52, 54.
- solenoid valves ML1 and ML2 are controlled to control the cylinder assembly 112, and solenoid valves MV1 and MV2 controllable to drive the cylinder assembly 132.
- Such a compressor control program runs, for example, on a superordinate compressor control.
- this compressor control program is integrated into the controller 218, wherein in particular the application limits of the screw compressor 10 and the parameters of the gaseous medium, that is in particular of the refrigerant, are known, and detects, for example via a pressure sensor SPN (FIG. 2) the low pressure 1, the temperature of the gaseous medium on the high-pressure side (FIG. 2) via a pressure sensor SPH (FIG. 1) and the temperature of the gaseous medium on the low-pressure side via a temperature sensor STN.
- a pressure sensor SPN FIG. 2
- SPH pressure sensor
- controller 2128 a detection of operating parameters of a not shown in particular electric drive motor with respect to speed, power consumption, voltage and temperature.
- the controller 218 may also detect, in particular, a lubricant pressure, a lubricant flow, a lubricant level, and a lubricant temperature.
- the controller 218 by an external signal, the required compressor power, for example, for the refrigeration system in which the screw compressor 10 operates specified.
- the second spool 54 ' is in the spool passage 56 and is guided in this with its guide peripheral surface 58'. Further, the second spool 54 'forms outer spool compression wall surfaces 62' 2 and 64 ' 2 that immediately adjoin the casing compression walls 66 and 68, with the spool compression wall surface 62' 2 attached to the screw rotor 26 and the spool compression wall surface 64 ' 2 adjacent to the screw rotor 28.
- the second control slide 54 ' is designed in cross-section crescent-shaped, so that in turn forms a slide channel 236, in which the first spool 52' is guided with a guide circumferential surface 238.
- the spool compression wall surfaces 62 ' 2 and 64' 2 of the second spool 54 'and the spool compression wall surfaces 62 ⁇ and 64 ⁇ of the first spool 52' complement the casing compression panels 66 and 68 to the compression panels 36 and 38 surrounding the screw contours 32 and 34, respectively.
- the first spool 52 'further defines the outlet edge 82' which faces the high pressure space 44 and defines the end volume by its distance from the end surface 84 in a manner comparable to that of the first embodiment.
- the second spool 54 affects the initial volume by the position of inlet edges 242 of the spool compression wall surfaces 62 2 and 64 2, and more particularly their distance from the low pressure side end surface 126.
- the first spool 52 ' is controllable by a cylinder arrangement 132' arranged in particular on the suction side, in which case the piston 136 'is formed in one piece on the first spool 52' and movable in the cylinder chamber 134 ', while the second spool 54' can be controlled by a cylinder arrangement 112 'arranged in particular on the pressure side.
- a slide arrangement is known and described for example in DE 32 21 849 AI, to which reference is made to soft with respect to the description of the principle of operation.
- the positions of the first spool 52 'and the second spool 54' are detectable by the position detecting means 152, and also position indicators 156 and 158 are coupled to the first spool 52 'and the second spool 54', respectively although by means of these control slides 52 'and 54' firmly connected connecting members 172, which pass through the passage 194 in the same manner as in the first embodiment, so that the position indicators 156 and 158 in the detector channel 216 along the detector element 154 are movable and in the same way
- a detection of the positions of the position indicator elements 156 and 158 can take place via the evaluation device 192.
- the position indicators 156 and 158 are preferably formed in the same manner as in the first embodiment as a fork body 174 and provided with magnets 184 and 186.
- a third embodiment which represents a basic version of a variant of the first embodiment and in FIGS. 15 to 18, the effective between the first spool 52 and the second spool 54 telescopic guide 92 "is formed so that the inner guide body 94 "is fixedly connected to the second spool 54, in particular with a threaded pin 222 is screwed into a threaded bore 224 of the piston 136, and parallel to
- Displacement direction 72 extends.
- the inner guide body 94 is thereby arranged rigidly relative to the piston 136 and, with its circumferential surfaces 226, forms a guide, aligned parallel to the displacement direction 72, for the first control slide 52.
- the first spool 52 is provided in the region of the guide receptacle 96 "for the guide body 94" with a generally designated 232 guide bushing, which on the peripheral surface 226 of the guide body 94 "precise is guided.
- the guide bush 232 is arranged on a piston 136 of the second spool 54 facing the end 234 of the guide body 94 ", so that the guide bush 232 is guided in all positions of the first spool 52 relative to the second spool 54 at the shortest possible distance from the piston 136 ,
- the guide bush 232 extends only over a portion of the extension of the guide receptacle 96 "parallel to the displacement direction 72, preferably only less than half, even better less than a quarter, the extension of the guide receptacle 94 in the direction of displacement 72nd
- Piston 136 experiences in the retraction 148 relative to the housing portion 142.
- piston rod 118 preferably rigidly connected to the piston rod 118, which also engages, for example by means of a threaded pin 242 in a threaded bore 244 in the first spool 52 so that thereby also a rigid fixation of the piston rod 118 takes place relative to the first spool 52.
- the threaded bore 244 is seated for the threaded pin 242 in the extension 122 of the first spool 52nd
- piston rod 118 is provided with a parallel to the direction of displacement 72 extending peripheral surface 246 which slidably in a
- Guide sleeve 252 is guided, which in turn sits in a guide bush receptacle 254, which is fixed to the low-pressure side
- Housing portion 142 and the high-pressure side housing portion 124 is connected.
- the guide bushing 252 represents the sole precise guidance of the piston rod 118 relative to the housing sections 142 and 124 and thus a precise guidance of the first spool 52 relative to the housing sections 142, 124, which takes place in addition to the guidance of the first spool 52 in the slide channel 56 ,
- first spool 52 thus additionally by the telescopic guide 92 ", formed by the guide bushing 232 and the rigidly connected to the second spool 54 inner guide body 94" out, and also by the precise guidance the piston rod 118 is guided by means of the guide bushing 252 relative to the housing sections 142 and 124, so that a through the game of the leadership of the first spool 52 in the slide channel 56 possibly possible noise, especially chatter, can be avoided during operation of the screw compressor according to the invention, since the telescopic guide 92 "and the guide of the piston rod 118 by means of the guide bushing 252 a lesser game than that of first spool 52 in the slide channel 56, thereby improving the guidance of the first spool 52.
- the guide receptacle 96 "provided with a ventilation channel 262, which opens into the guide receptacle 96", for example, near the guide bush 32 and
- the ventilation channel 262 is still provided with an inserted throttle 264, which allows to control the gas exchange between the guide receptacle 96 "and the space for receiving the position detecting means 152 so as to dampen the movements of the first spool 52 relative to the guide body 94" ,
- the ventilation duct 262 preferably opens into a section 266 of the guide body receptacle 96 ", which lies between the guide bush 232 and an end wall 268 of the guide body receptacle 96".
- Screwing the threaded pin 232 into the threaded bore 224 is the first spool 52 in the region of its end 234 opposite end 274 with an access to the guide receptacle 96 "
- Guide receptacle 96 is arranged, but in operation by a
- the bore 276 allows during assembly of the guide body 94 ", in particular when screwing the threaded pin 222 into the threaded bore 224 in the guide receptacle 96" with a tool from the side of the end 274 starting to intervene and with a on a the
- Threaded pin 222 opposite end of the guide body 94 "arranged positive locking element 282 the guide body 94" to rotate to screw the threaded pin 222 in the threaded bore 224. Subsequently, then closes the bore 276 through the closure 278th
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102014114605 | 2014-10-08 | ||
DE102015116324.1A DE102015116324A1 (de) | 2014-10-08 | 2015-09-28 | Schraubenverdichter |
PCT/EP2015/072934 WO2016055412A1 (de) | 2014-10-08 | 2015-10-05 | Schraubenverdichter |
Publications (2)
Publication Number | Publication Date |
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EP3204648A1 true EP3204648A1 (de) | 2017-08-16 |
EP3204648B1 EP3204648B1 (de) | 2021-12-22 |
Family
ID=55644263
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP15771988.1A Active EP3204648B1 (de) | 2014-10-08 | 2015-10-05 | Schraubenverdichter |
Country Status (6)
Country | Link |
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US (1) | US10794382B2 (de) |
EP (1) | EP3204648B1 (de) |
CN (1) | CN106795884B (de) |
DE (1) | DE102015116324A1 (de) |
RU (1) | RU2684053C2 (de) |
WO (1) | WO2016055412A1 (de) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102015006129A1 (de) * | 2015-05-09 | 2016-11-10 | Man Diesel & Turbo Se | Schraubenmaschine |
EP4245997A3 (de) * | 2016-04-06 | 2023-12-27 | BITZER Kühlmaschinenbau GmbH | Verdichtereinheit und verfahren zum betreiben einer verdichtereinheit |
RU2713784C1 (ru) * | 2016-04-06 | 2020-02-07 | Битцер Кюльмашиненбау Гмбх | Винтовой компрессор (варианты) |
DE102017115623A1 (de) | 2016-07-13 | 2018-01-18 | Trane International Inc. | Variable Economizereinspritzposition |
CN111148900B (zh) * | 2017-09-04 | 2021-11-09 | 比泽尔制冷设备有限公司 | 螺旋压缩机 |
CN111425396B (zh) | 2019-01-09 | 2021-09-10 | 约克(无锡)空调冷冻设备有限公司 | 螺杆压缩机及其控制方法 |
EP4088032A1 (de) * | 2020-01-07 | 2022-11-16 | Johnson Controls Tyco IP Holdings LLP | Volumenverhältnis-steuerungssystem für einen kompressor |
DE102020000350A1 (de) | 2020-01-21 | 2021-07-22 | Ralf Steffens | Volumenverhältnis bei einem R718*-Verdichter |
DE102020115442A1 (de) * | 2020-06-10 | 2021-12-16 | Bitzer Kühlmaschinenbau Gmbh | Schraubenexpander und Anlage zur Gewinnung elektrischer Energie aus Wärme mit einem Schraubenexpander |
USD1040187S1 (en) * | 2020-10-09 | 2024-08-27 | Bitzer Kuehlmaschinenbau Gmbh | Compressor |
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GB1171291A (en) * | 1965-10-12 | 1969-11-19 | Svenska Rotor Maskiner Ab | Screw Rotor Machines |
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US4249866A (en) * | 1978-03-01 | 1981-02-10 | Dunham-Bush, Inc. | Control system for screw compressor |
JPS58101289A (ja) * | 1981-12-11 | 1983-06-16 | Kobe Steel Ltd | スクリユ圧縮機 |
DE3221849A1 (de) | 1982-06-09 | 1983-12-15 | Aerzener Maschinenfabrik Gmbh, 3251 Aerzen | Schraubenverdichter |
GB2159980B (en) * | 1982-09-10 | 1987-10-07 | Frick Co | Micro-processor control of compression ratio at full load in a helical screw rotary compressor responsive to compressor drive motor current |
US4610612A (en) * | 1985-06-03 | 1986-09-09 | Vilter Manufacturing Corporation | Rotary screw gas compressor having dual slide valves |
US4678406A (en) * | 1986-04-25 | 1987-07-07 | Frick Company | Variable volume ratio screw compressor with step control |
JPS6435092A (en) * | 1987-07-30 | 1989-02-06 | Kobe Steel Ltd | Slide valve control device for screw compressor |
US4743170A (en) * | 1987-09-03 | 1988-05-10 | Fes, Inc. | Slide valve position indicator and magnetic coupler |
US4909716A (en) * | 1988-10-19 | 1990-03-20 | Dunham-Bush | Screw step drive internal volume ratio varying system for helical screw rotary compressor |
JP2616161B2 (ja) * | 1990-06-27 | 1997-06-04 | ダイキン工業株式会社 | スクリュー圧縮機の容量制御装置 |
US5183395A (en) * | 1992-03-13 | 1993-02-02 | Vilter Manufacturing Corporation | Compressor slide valve control |
US5257921A (en) * | 1992-05-19 | 1993-11-02 | Fes, Inc. | Electronic slide valve position indicator |
GB2331574A (en) * | 1997-11-20 | 1999-05-26 | Gethin Bermingham | Sensing device for screw compressor valve |
DE10333400A1 (de) * | 2003-07-16 | 2005-02-10 | Bitzer Kühlmaschinenbau Gmbh | Schraubenverdichter |
CN2667205Y (zh) * | 2003-12-19 | 2004-12-29 | 泰豪科技股份有限公司 | 螺杆压缩机输气量调节滑阀位置信号检测装置 |
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RU2418193C1 (ru) * | 2009-10-27 | 2011-05-10 | Закрытое акционерное общество "Научно-исследовательский и конструкторский институт центробежных и роторных компрессоров им. В.Б. Шнеппа" | Винтовой компрессор с регулятором производительности |
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-
2015
- 2015-09-28 DE DE102015116324.1A patent/DE102015116324A1/de active Pending
- 2015-10-05 CN CN201580054579.2A patent/CN106795884B/zh active Active
- 2015-10-05 RU RU2017116018A patent/RU2684053C2/ru active
- 2015-10-05 WO PCT/EP2015/072934 patent/WO2016055412A1/de active Application Filing
- 2015-10-05 EP EP15771988.1A patent/EP3204648B1/de active Active
-
2017
- 2017-04-07 US US15/482,021 patent/US10794382B2/en active Active
Non-Patent Citations (2)
Title |
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None * |
See also references of WO2016055412A1 * |
Also Published As
Publication number | Publication date |
---|---|
US10794382B2 (en) | 2020-10-06 |
US20170211574A1 (en) | 2017-07-27 |
WO2016055412A1 (de) | 2016-04-14 |
RU2684053C2 (ru) | 2019-04-03 |
DE102015116324A1 (de) | 2016-04-14 |
EP3204648B1 (de) | 2021-12-22 |
RU2017116018A (ru) | 2018-11-12 |
CN106795884B (zh) | 2018-12-14 |
CN106795884A (zh) | 2017-05-31 |
RU2017116018A3 (de) | 2018-11-12 |
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