CA1058609A - Heat exchanging assembly for gas compressor - Google Patents
Heat exchanging assembly for gas compressorInfo
- Publication number
- CA1058609A CA1058609A CA297,900A CA297900A CA1058609A CA 1058609 A CA1058609 A CA 1058609A CA 297900 A CA297900 A CA 297900A CA 1058609 A CA1058609 A CA 1058609A
- Authority
- CA
- Canada
- Prior art keywords
- closure head
- housing
- gas
- conduit
- heat exchanger
- 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.)
- Expired
Links
Landscapes
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A heat exchanging assembly for use in a gas compres-sor or the like. The heat exchanging assembly comprises a housing, and means defining an annular heat exchanger confined therein. The heat exchanger has a central, through-traversing pipe for admitting gas therethrough into the housing. Provi-sion is also made for discharging gas from the housing through the heat exchanger. The improvement comprises a generally cup-shaped closure head at one end of the housing, the said one end of the housing and closure head having mating, interfacing flanges. The interfacing flanges are separably fastened together.
The closure head has a conduit in penetration thereof. The con-duit opens at one end thereof externally of the closure head, and opens internally of the closure head in communication with the through-traversing pipe. The housing is also open-ended at the end thereof opposite the said one end. The said opposite end of the housing has an external coupling flange formed thereon.
The one end of the conduit also has an external coupling flange formed thereon. The conduit cooperates with the closure head to define an annular chamber within the closure head. The conduit further includes a gas discharge pipe opening at one end thereof through the closure head and onto the annular chamber there-within, and opening at the other end thereof externally of the closure head. The other end of the gas discharge pipe has an external coupling flange formed thereon.
A heat exchanging assembly for use in a gas compres-sor or the like. The heat exchanging assembly comprises a housing, and means defining an annular heat exchanger confined therein. The heat exchanger has a central, through-traversing pipe for admitting gas therethrough into the housing. Provi-sion is also made for discharging gas from the housing through the heat exchanger. The improvement comprises a generally cup-shaped closure head at one end of the housing, the said one end of the housing and closure head having mating, interfacing flanges. The interfacing flanges are separably fastened together.
The closure head has a conduit in penetration thereof. The con-duit opens at one end thereof externally of the closure head, and opens internally of the closure head in communication with the through-traversing pipe. The housing is also open-ended at the end thereof opposite the said one end. The said opposite end of the housing has an external coupling flange formed thereon.
The one end of the conduit also has an external coupling flange formed thereon. The conduit cooperates with the closure head to define an annular chamber within the closure head. The conduit further includes a gas discharge pipe opening at one end thereof through the closure head and onto the annular chamber there-within, and opening at the other end thereof externally of the closure head. The other end of the gas discharge pipe has an external coupling flange formed thereon.
Description
The invention pertains to an improved heat exchanging assembly for use in a gas compressor or the like.
This application is a division of Canadian Patent Application Serial No. 248,343 filed March 12, 1976.
In prior gas compressors, the packaging arrangements thereof ~lave been defined by the requirements of the machinery.
This necessitates that each arrangement or design must be sub-stantially discrete, requiring considerable manufacturing and maintenance-spares expense. Such prior gas compressors offer little flexibility in design, and few efficient, self-contained, integrated components. An exception to this can be found in U~S. Patent 3,355,097 issued to Hanns Hornschuch on November 28, 1967 for a "Fluid Machine". In the aforenoted patent, the patentee defined fluid machines, such as a gas compressor, which offered an attractive, economical, and readily "main-tainable" structure. The patent disclosed, in particular, a gas compressor packaging arrangement in which substantially all inter-stage ducting is self-contained within an end panel or closure which is hinged to the housing. According to the pre-sent invention, inter-stage ducting --if employed-- is external, however, a wide flexibility of design is offered in the packaging of the compressor, according to the invention, with compact, self-contained, mutually couplable, and easily replaceable com-ponents.
According to a broad feature of the present inven-tion, from a broad aspect, there is provided a heat exchanging assembly for use in a gas compressor or the like. The heat ex-changing assembly comprises a housing, and means defining an annular heat exchanger confined therein. The heat exchanger has a central, through-traversing pipe for admitting gas there-through into the housing. Provision is also made for discharging - 1 - ~k~
gas from the housing through the heat exchanger. The improve-ment comprises a generally cup-shaped closure head at one end of the housing, the said one end of the housing and closure head having mating, interfacing flanges. The interfacing flanges are separably fastened together. The closure head has a conduit in penetration thereof. The conduit opens at one end thereof externally of the closure head, and opens internally of the closure head in communication with the through-traversing pipe. The housing is also open-ended at the end thereof oppo-site the said one end. The said opposite end of the housinghas an external coupling flange formed thereon. The one end of the conduit also has an external coupling flange formed thereon.
The conduit cooperates with the closure head to define an annu-lar chamber within the closure head. The conduit further in-cludes a gas discharge pipe opening at one end thereof through the closure head and onto the annular chamber therewithin, and opening at the other end thereof externally of the closure head.
The other end of the gas discharge pipe has an external coupling flange formed thereon.
~058609 Further objects and features of this invention will become more apparent by reference to the following description taken in conjunction with the accompanying figures in which:
Fig. 1 is a side elevation, in outline, of a gas compressor according to the invention, the same being shown fixed to one end of a skid or platform and being coupled to a power plant mounted at the other end of the platform, Fig. 2 is an end view of the arrangement of Fig. 1, taken from the right side of Fig. 1, and showing the inter-ducting and closures for the two stages comprised by this embo-diment Fig. 3 is a cross-sectional view of the Figs. 1 and
This application is a division of Canadian Patent Application Serial No. 248,343 filed March 12, 1976.
In prior gas compressors, the packaging arrangements thereof ~lave been defined by the requirements of the machinery.
This necessitates that each arrangement or design must be sub-stantially discrete, requiring considerable manufacturing and maintenance-spares expense. Such prior gas compressors offer little flexibility in design, and few efficient, self-contained, integrated components. An exception to this can be found in U~S. Patent 3,355,097 issued to Hanns Hornschuch on November 28, 1967 for a "Fluid Machine". In the aforenoted patent, the patentee defined fluid machines, such as a gas compressor, which offered an attractive, economical, and readily "main-tainable" structure. The patent disclosed, in particular, a gas compressor packaging arrangement in which substantially all inter-stage ducting is self-contained within an end panel or closure which is hinged to the housing. According to the pre-sent invention, inter-stage ducting --if employed-- is external, however, a wide flexibility of design is offered in the packaging of the compressor, according to the invention, with compact, self-contained, mutually couplable, and easily replaceable com-ponents.
According to a broad feature of the present inven-tion, from a broad aspect, there is provided a heat exchanging assembly for use in a gas compressor or the like. The heat ex-changing assembly comprises a housing, and means defining an annular heat exchanger confined therein. The heat exchanger has a central, through-traversing pipe for admitting gas there-through into the housing. Provision is also made for discharging - 1 - ~k~
gas from the housing through the heat exchanger. The improve-ment comprises a generally cup-shaped closure head at one end of the housing, the said one end of the housing and closure head having mating, interfacing flanges. The interfacing flanges are separably fastened together. The closure head has a conduit in penetration thereof. The conduit opens at one end thereof externally of the closure head, and opens internally of the closure head in communication with the through-traversing pipe. The housing is also open-ended at the end thereof oppo-site the said one end. The said opposite end of the housinghas an external coupling flange formed thereon. The one end of the conduit also has an external coupling flange formed thereon.
The conduit cooperates with the closure head to define an annu-lar chamber within the closure head. The conduit further in-cludes a gas discharge pipe opening at one end thereof through the closure head and onto the annular chamber therewithin, and opening at the other end thereof externally of the closure head.
The other end of the gas discharge pipe has an external coupling flange formed thereon.
~058609 Further objects and features of this invention will become more apparent by reference to the following description taken in conjunction with the accompanying figures in which:
Fig. 1 is a side elevation, in outline, of a gas compressor according to the invention, the same being shown fixed to one end of a skid or platform and being coupled to a power plant mounted at the other end of the platform, Fig. 2 is an end view of the arrangement of Fig. 1, taken from the right side of Fig. 1, and showing the inter-ducting and closures for the two stages comprised by this embo-diment Fig. 3 is a cross-sectional view of the Figs. 1 and
2 embodiment, taken generally through the plane in which both rotary axes of the two stages are found, Fig. 4 is a plan view of an alternate embo iment of a gas compressor, according to the invention, in which a series of three compressing stages are provided, Fig. 5 is yet another embodiment, also in plan view, of the invention, wherein a pair of independent compressing stages are defined, and Fig. 6 is a fragmentary cross-sectional view of a modified version of the Figs. 1-3 embodiment of the invention.
As shown in Figures 1 and 2, the gas compressor 10 comprises a gear housing 12, fixed to a platform 14, which has a drive shaft 16 coupled thereto, centrally thereof, via a bull gear 18 for driving gears which power impellers. me drive shaft 16 is coupled to a power plant 20 enclosed within a hous-ing 22. In the end view, Fig. 2, it can be seen that two stages of compression are arranged side by side, each thereof being enclosed within housing shells 24 and 26. Ducting 28 conducts the outlet of the first stage to the inlet of the se~ond stage.
A flanged opening 30 comprises the inlet for the first stage, and a tangential conduit 32 carries off the product of the second stage. As will be seen more clearly in Fig. 3, shell 24 is an external wall of an inter-cooler heat exchanger 34.
The embodiment of Figs. 1 and 2 is shown in more detail, and in cross-section, in Fig. 3, the cross-section taken generally through the plane in which first and second stage impellers 36 and 38 rotate on parallel axes. The gear housing 12 is self-contained being defined by a perimeter wall 40 and parallel side walls 42 and 44. The drive shaft 16 is in penetration of side wall 42 and the impellers 36 and 38 are external of the housing being enclosed in gas handling struc-tures 46 and 48 which are integral with wall 44. The bull gear 18 drivingly engages the first and second stage gears S0 and 52 which in turn power the respective impellers 36 and 38.
Struc'ures 46 and 48 define, centrally thereof, inlet pipes 54 and 56 for admitting gas to each of the stages' impel-lers, and also comprise diffusers 58 and 60 and open-ended plenums 62 and 64. The first stage has an inter-cooler, i.e., the heat exchanger 34 bolted to the flange 68 of the structure 46 and a cup-shaped domed closure or closure head 70 is, in turn, bolted to the heat exchanger. Both the domed closure or closure head and the heat exchanger have central pipes 72 and 74 which are matingly engaged to define a common central inlet pipe for admitting gas to the impeller 36 of the first stage. The domed closure or closure head also has a tangential outlet pipe 76 for discharging the compressed gas product of the first stage.
It will be self-evident that, if desirable, the heat exchanger can be dispensed with, and the domed closure or closure head 70 can be bolted directly to the flange 68 of the structure 46.
Pipes 72 and 74 axially traverse or penetrate the closure head 70 and the heat exchanger 34, the latter, then, is of annular configuration~ and pipe 72 defines, thereabout, an annular chamber within closure head 70.
The tangential outlet pipe 76, comprising part of ducting 28, is, in turn, bolted to a ninety-degree elbow 78 which, in turn, is bolted to a second domed closure or closure head 70a, the latter being replaceably fixed about the second stage impeller 38. Each end of elbow 78 has a coupling flange formed thereon. One of the flanges, of course, is removably bolted to a terminal flange formed on the end of outlet pipe 76, and the other thereof is removably bolted to the flanged opening (corresponding to opening 30 of closure head 70) pro-jecting from the second domed closure or closure head 70a.
Closure head 70a has an annular flange formed about the open end thereof which is bolted to an external flange (corresponding to flange 68) which extends from structure 48, and has the tan-gential outlet pipe 32 for withdrawing the compressed gas pro-duct. If it will be deemed advisable or desirable, the elbow 78 could be dispensed with and an after-cooler could be bolted in place in the second stage (in the same manner as the inter-cooler 34 is provided for the first stage). Inter-cooler 34, of course, has terminal flanges which, at either ends, are removably bolted to the annular flange formed on the open end of closure head 70, and to the flange 68 which extends from the structure 46. Such an after-cooler heat exchanger would be bolted to the second stage structure 48; the gas input for such an embodiment would be supplied directly by pipe 76 into a modified, second stage end closure, and the second stage outlet would be arranged in a side wall of the after-cooler outer shell. Such an arrangement is outlined in Fig. 4.
As shown in Fig. 4, a further embodiment comprises a compact gear housing 12a again bolted to a skid or platform 14 but which, in this arrangement accommodates for three stages of compression. The first stage is substantially identical to the first stage of the embodiment in Figs. 1 through 3. How-ever, the second stage does have an inter-cooler heat exchanger 34a, and from an end portion thereof, is arranged a delivery pipe 80 which conducts the product to a third stage 82. In this arrangement, instead of two driven gears 50 and 52 (Fig. 3) arranged at opposite sides of the bull gear 18, there are three driven gears 50, 52 and 52a deployed about the periphery of the bull gear, within the gear housing 12a, each driving an impeller.
The embodiment shown in Fig. 5 shows a further packag-ing arrangement where the compressor lOb has single stages of compression provided on that which is basically a same gear housing 12b; two compression stages 84 and 84a are side by side and supply parallel outputs. As noted before, it is quite within the option of the user to add to one or both of these two stages a heat exchanger, according to the practice shown in Fig. 3 and, if desirable, to so modify the arrangement as to have stage 84 supply its output to stage 84a for further compres-sion.
To revert to Fig. 3, domed closure or closure head 70 incorporates a demister 86, to collect water vapor which may be entrained in the gas product, and by conventional means (not shown) the _ollected liquid is drained from the compressor 10.
The heat exchanger 34 has throughput pipes 88, arranged in straight columns and rows (to facilitate cleaning), for conduct-ing the gas product therethrough. Ports 90 and 92 supply and discharge coolant to and fro~ the heat exchanger, in a manner well known in the art.
The embodiment shown only in a discontinuous and frag-mentary cross-section in Fig. 6 is a modified version of the novel gas compressor of Figs. 1-3. In this latter embodiment, the domed closure 70' and housing shell 24a are integral--the two being formed as a single article of manufacture. The shell 24a is bolted (hardware not shown) replaceably to flange 68 of structure 46. Domed closure or closure head 70' (like closure 70, Fig. 3) incorporates the same flanged opening 30, central pipe 72, and outlet pipe 76, and encloses demister 86.
Too, shell 24a encloses the heat exchanger 34.
While I have described my invention in connection with specific embodiments thereof, it is to be clearly under-stood that this is done only by way of example, and not as a limitation to the scope of my invention as set forth in the objects thereof and in the appended claims.
As shown in Figures 1 and 2, the gas compressor 10 comprises a gear housing 12, fixed to a platform 14, which has a drive shaft 16 coupled thereto, centrally thereof, via a bull gear 18 for driving gears which power impellers. me drive shaft 16 is coupled to a power plant 20 enclosed within a hous-ing 22. In the end view, Fig. 2, it can be seen that two stages of compression are arranged side by side, each thereof being enclosed within housing shells 24 and 26. Ducting 28 conducts the outlet of the first stage to the inlet of the se~ond stage.
A flanged opening 30 comprises the inlet for the first stage, and a tangential conduit 32 carries off the product of the second stage. As will be seen more clearly in Fig. 3, shell 24 is an external wall of an inter-cooler heat exchanger 34.
The embodiment of Figs. 1 and 2 is shown in more detail, and in cross-section, in Fig. 3, the cross-section taken generally through the plane in which first and second stage impellers 36 and 38 rotate on parallel axes. The gear housing 12 is self-contained being defined by a perimeter wall 40 and parallel side walls 42 and 44. The drive shaft 16 is in penetration of side wall 42 and the impellers 36 and 38 are external of the housing being enclosed in gas handling struc-tures 46 and 48 which are integral with wall 44. The bull gear 18 drivingly engages the first and second stage gears S0 and 52 which in turn power the respective impellers 36 and 38.
Struc'ures 46 and 48 define, centrally thereof, inlet pipes 54 and 56 for admitting gas to each of the stages' impel-lers, and also comprise diffusers 58 and 60 and open-ended plenums 62 and 64. The first stage has an inter-cooler, i.e., the heat exchanger 34 bolted to the flange 68 of the structure 46 and a cup-shaped domed closure or closure head 70 is, in turn, bolted to the heat exchanger. Both the domed closure or closure head and the heat exchanger have central pipes 72 and 74 which are matingly engaged to define a common central inlet pipe for admitting gas to the impeller 36 of the first stage. The domed closure or closure head also has a tangential outlet pipe 76 for discharging the compressed gas product of the first stage.
It will be self-evident that, if desirable, the heat exchanger can be dispensed with, and the domed closure or closure head 70 can be bolted directly to the flange 68 of the structure 46.
Pipes 72 and 74 axially traverse or penetrate the closure head 70 and the heat exchanger 34, the latter, then, is of annular configuration~ and pipe 72 defines, thereabout, an annular chamber within closure head 70.
The tangential outlet pipe 76, comprising part of ducting 28, is, in turn, bolted to a ninety-degree elbow 78 which, in turn, is bolted to a second domed closure or closure head 70a, the latter being replaceably fixed about the second stage impeller 38. Each end of elbow 78 has a coupling flange formed thereon. One of the flanges, of course, is removably bolted to a terminal flange formed on the end of outlet pipe 76, and the other thereof is removably bolted to the flanged opening (corresponding to opening 30 of closure head 70) pro-jecting from the second domed closure or closure head 70a.
Closure head 70a has an annular flange formed about the open end thereof which is bolted to an external flange (corresponding to flange 68) which extends from structure 48, and has the tan-gential outlet pipe 32 for withdrawing the compressed gas pro-duct. If it will be deemed advisable or desirable, the elbow 78 could be dispensed with and an after-cooler could be bolted in place in the second stage (in the same manner as the inter-cooler 34 is provided for the first stage). Inter-cooler 34, of course, has terminal flanges which, at either ends, are removably bolted to the annular flange formed on the open end of closure head 70, and to the flange 68 which extends from the structure 46. Such an after-cooler heat exchanger would be bolted to the second stage structure 48; the gas input for such an embodiment would be supplied directly by pipe 76 into a modified, second stage end closure, and the second stage outlet would be arranged in a side wall of the after-cooler outer shell. Such an arrangement is outlined in Fig. 4.
As shown in Fig. 4, a further embodiment comprises a compact gear housing 12a again bolted to a skid or platform 14 but which, in this arrangement accommodates for three stages of compression. The first stage is substantially identical to the first stage of the embodiment in Figs. 1 through 3. How-ever, the second stage does have an inter-cooler heat exchanger 34a, and from an end portion thereof, is arranged a delivery pipe 80 which conducts the product to a third stage 82. In this arrangement, instead of two driven gears 50 and 52 (Fig. 3) arranged at opposite sides of the bull gear 18, there are three driven gears 50, 52 and 52a deployed about the periphery of the bull gear, within the gear housing 12a, each driving an impeller.
The embodiment shown in Fig. 5 shows a further packag-ing arrangement where the compressor lOb has single stages of compression provided on that which is basically a same gear housing 12b; two compression stages 84 and 84a are side by side and supply parallel outputs. As noted before, it is quite within the option of the user to add to one or both of these two stages a heat exchanger, according to the practice shown in Fig. 3 and, if desirable, to so modify the arrangement as to have stage 84 supply its output to stage 84a for further compres-sion.
To revert to Fig. 3, domed closure or closure head 70 incorporates a demister 86, to collect water vapor which may be entrained in the gas product, and by conventional means (not shown) the _ollected liquid is drained from the compressor 10.
The heat exchanger 34 has throughput pipes 88, arranged in straight columns and rows (to facilitate cleaning), for conduct-ing the gas product therethrough. Ports 90 and 92 supply and discharge coolant to and fro~ the heat exchanger, in a manner well known in the art.
The embodiment shown only in a discontinuous and frag-mentary cross-section in Fig. 6 is a modified version of the novel gas compressor of Figs. 1-3. In this latter embodiment, the domed closure 70' and housing shell 24a are integral--the two being formed as a single article of manufacture. The shell 24a is bolted (hardware not shown) replaceably to flange 68 of structure 46. Domed closure or closure head 70' (like closure 70, Fig. 3) incorporates the same flanged opening 30, central pipe 72, and outlet pipe 76, and encloses demister 86.
Too, shell 24a encloses the heat exchanger 34.
While I have described my invention in connection with specific embodiments thereof, it is to be clearly under-stood that this is done only by way of example, and not as a limitation to the scope of my invention as set forth in the objects thereof and in the appended claims.
Claims (2)
1. For use with a gas compressor, an improved heat exchanging assembly, comprising a housing, means defining an annular heat exchanger confined within said housing; said heat exchanger having a central, through-traversing pipe for ad-mitting gas therethrough into said housing; and means for dis-charging gas from said housing through said heat exchanger;
wherein the improvement comprises:
a generally cup-shaped closure head at one end of said housing, said one end of said housing and said closure head having mating, interfacing flanges;
said interfacing flanges being separably fastened together;
said closure head having a conduit in penetration thereof, said conduit opening at one end thereof externally of said closure head, and opening internally of said closure head in communication with said through-traversing pipe;
said housing being open-ended at the end thereof opposite said one end;
said opposite end of said housing having an external coupling flange formed thereon, and said one end of said conduit also having an external coupling flange formed thereon; wherein said conduit cooperates with said closure head to define an annular chamber within said closure head, and further including a gas discharge pipe opening at one end thereof through said closure head and onto said annular chamber therewithin, and opening at the other end thereof externally of said closure head, and said other end of said gas discharge pipe has an external coupling flange formed thereon.
wherein the improvement comprises:
a generally cup-shaped closure head at one end of said housing, said one end of said housing and said closure head having mating, interfacing flanges;
said interfacing flanges being separably fastened together;
said closure head having a conduit in penetration thereof, said conduit opening at one end thereof externally of said closure head, and opening internally of said closure head in communication with said through-traversing pipe;
said housing being open-ended at the end thereof opposite said one end;
said opposite end of said housing having an external coupling flange formed thereon, and said one end of said conduit also having an external coupling flange formed thereon; wherein said conduit cooperates with said closure head to define an annular chamber within said closure head, and further including a gas discharge pipe opening at one end thereof through said closure head and onto said annular chamber therewithin, and opening at the other end thereof externally of said closure head, and said other end of said gas discharge pipe has an external coupling flange formed thereon.
2. An improved heat exchanging assembly, according to claim 1, further including:
demister means, confined within said annular chamber in said closure head, for entraining and removing moisture from gas.
demister means, confined within said annular chamber in said closure head, for entraining and removing moisture from gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA297,900A CA1058609A (en) | 1975-05-27 | 1978-02-28 | Heat exchanging assembly for gas compressor |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US05/581,218 US4010016A (en) | 1975-05-27 | 1975-05-27 | Gas compressor |
| CA248,343A CA1052343A (en) | 1975-05-27 | 1976-03-12 | Gas compressor |
| CA297,900A CA1058609A (en) | 1975-05-27 | 1978-02-28 | Heat exchanging assembly for gas compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1058609A true CA1058609A (en) | 1979-07-17 |
Family
ID=27164382
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA297,900A Expired CA1058609A (en) | 1975-05-27 | 1978-02-28 | Heat exchanging assembly for gas compressor |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1058609A (en) |
-
1978
- 1978-02-28 CA CA297,900A patent/CA1058609A/en not_active Expired
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA1052343A (en) | Gas compressor | |
| DE3460686D1 (en) | Flexible tube pump | |
| JPS55148994A (en) | Closed scroll fluid device | |
| EP2256346A3 (en) | Two-stage rotary type compressor with filter | |
| ES2191045T3 (en) | HELICOIDAL COMPRESSOR SUITABLE TO EFFECTIVELY SEPARATE OIL FROM COMPRESSED GAS. | |
| JPS54139107A (en) | Hermetic scroll compressor | |
| CA1058609A (en) | Heat exchanging assembly for gas compressor | |
| CN203348079U (en) | Oil associated gas vortex compressor | |
| ATE209751T1 (en) | SPIRAL DISPLACEMENT MACHINE FOR COMPRESSIBLE MEDIA | |
| JPS6429688A (en) | Motor-driven compressor | |
| JPS5614406A (en) | Ozonizer | |
| JPS5535168A (en) | Screw type fluid machine | |
| JPS5650294A (en) | Isothermal compressor of multistage roots type | |
| JPS57183589A (en) | Scroll compressor | |
| SU918527A1 (en) | Screw compressor | |
| SU1262113A1 (en) | Two-rotor vacuum pump of ruts type | |
| CN213743915U (en) | High-efficient heat dissipation type integrated form air compressor machine based on thing networking | |
| JPS5564189A (en) | Compressor for turborefrigerator | |
| SU1566085A1 (en) | Liquid-ring machine | |
| SU1710849A1 (en) | Two-stage centrifugal supercharger | |
| SU1028972A1 (en) | Thermocompressor and its operation process | |
| EP0101942A3 (en) | Gas generator of the turbo-compressor type for low capacity, pressure and temperature | |
| SU1671990A1 (en) | Fan casing | |
| JPS575600A (en) | Previous revolution device for compressor | |
| JPS5612094A (en) | Rotary refrigerant compressor |