US20110219813A1 - Turbo compressor and turbo refrigerator - Google Patents
Turbo compressor and turbo refrigerator Download PDFInfo
- Publication number
- US20110219813A1 US20110219813A1 US13/043,704 US201113043704A US2011219813A1 US 20110219813 A1 US20110219813 A1 US 20110219813A1 US 201113043704 A US201113043704 A US 201113043704A US 2011219813 A1 US2011219813 A1 US 2011219813A1
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- United States
- Prior art keywords
- turbo
- compressor
- refrigerant
- flow rate
- condenser
- 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.)
- Abandoned
Links
- 230000005540 biological transmission Effects 0.000 claims abstract description 62
- 239000003507 refrigerant Substances 0.000 claims description 111
- 238000001816 cooling Methods 0.000 claims description 27
- 238000001704 evaporation Methods 0.000 claims description 11
- 238000009834 vaporization Methods 0.000 claims description 11
- 230000008016 vaporization Effects 0.000 claims description 11
- 230000006835 compression Effects 0.000 description 34
- 238000007906 compression Methods 0.000 description 34
- 239000007788 liquid Substances 0.000 description 16
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000012856 packing Methods 0.000 description 4
- 238000005057 refrigeration Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D25/0606—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/02—Surge control
- F04D27/0246—Surge control by varying geometry within the pumps, e.g. by adjusting vanes
Definitions
- the present invention relates to a turbo compressor and a turbo refrigerator.
- Priority is claimed on Japanese Patent Application No. 2010-053737, filed on Mar. 10, 2010, the contents of which are incorporated herein by reference.
- a turbo refrigerator which is provided with a turbo compressor that compresses and discharges refrigerant gas is known.
- a flow rate adjustment unit that adjusts the flow rate of the refrigerant gas that is introduced into a rotating impeller is provided, as shown in, for example, Japanese Unexamined Patent Application Publication No. 2007-177695. It is possible to adjust the compression performance of the turbo compressor and the cooling and refrigeration performance or the like of the turbo refrigerator by adjusting the flow rate of the refrigerant gas by the flow rate adjustment unit.
- the flow rate adjustment unit includes a flow rate adjustment section which is provided with a plurality of vanes (blades), a driving section such as a motor or the like which drives the flow rate adjustment section, and a power transmission shaft which transmits power that is generated by the driving section to the flow rate adjustment section.
- a flow rate adjustment section which is provided with a plurality of vanes (blades)
- a driving section such as a motor or the like which drives the flow rate adjustment section
- a power transmission shaft which transmits power that is generated by the driving section to the flow rate adjustment section.
- the power transmission shaft is provided passing through a hole portion which is formed in a casing of the turbo compressor, and connects the flow rate adjustment section and the driving section, which are respectively provided inside and outside the casing.
- the flow rate adjustment section and the power transmission shaft it is necessary to first install the flow rate adjustment section in the inside of the casing and then connect the power transmission shaft to the flow rate adjustment section by passing the power transmission shaft through the hole portion.
- the present invention has been made in consideration of the circumstances as mentioned above and has an object of providing a turbo compressor and a turbo refrigerator, which improve the assembly workability of a flow rate adjustment section and a power transmission shaft, thereby allowing, the labor hours and cost of the manufacturing to be reduced.
- the present invention adopts the following means.
- a turbo compressor includes: a flow rate adjustment section which adjusts the flow rate of gas that is introduced into an impeller; a driving section which drives the flow rate adjustment section; and a power transmission shaft which transmits power that is generated by the driving section to the flow rate adjustment section, wherein the turbo compressor further includes a frame which is provided to surround the flow rate adjustment section, and the frame has an intake port for gas that is introduced into the impeller and a hole portion in which the power transmission shaft is provided passing through.
- the power transmission shaft is provided passing through the hole portion which is formed in the frame, and connects the flow rate adjustment section and the driving section, which are respectively provided inside and outside the frame.
- the power transmission shaft is connected to the flow rate adjustment section by passing the power transmission shaft through the hole portion of the frame. That is, it is possible to assemble the flow rate adjustment section and the power transmission shaft while checking a connection place of the flow rate adjustment section and the power transmission shaft from the outside, so that the assembly workability of the flow rate adjustment section and the power transmission shaft is improved.
- the frame is provided in an annular shape to surround the flow rate adjustment section and has an outer diameter which is reduced as it becomes more distant from the impeller.
- turbo compressor according to a third aspect of the present invention further includes a connection section which connects an output shaft which outputs the power of the driving section and the power transmission shaft.
- the turbo compressor according to a fourth aspect of the present invention further includes a seal member which keeps the hole portion, in which the power transmission shaft is provided passing through, in an airtight manner.
- a turbo refrigerator includes: a condenser which cools and liquefies a compressed refrigerant; an evaporator which cools a cooling object by evaporating the liquefied refrigerant, thereby taking heat of vaporization away from the cooling object; and a compressor which compresses the refrigerant evaporated in the evaporator and then supplies the compressed refrigerant to the condenser, wherein the turbo refrigerator is provided with the turbo compressor according to any one of the first to fourth aspects of the present invention as the compressor.
- the present invention it is possible to assemble the flow rate adjustment section and the power transmission shaft while checking a connection place of the flow rate adjustment section and the power transmission shaft from the outside, so that the assembly workability of the flow rate adjustment section and the power transmission shaft is improved. Accordingly, the labor hours and cost involved in the manufacturing of the turbo compressor and the turbo refrigerator, each of which is provided with the flow rate adjustment section and the power transmission shaft, can be reduced.
- FIG. 1 is a block diagram showing a schematic configuration of a turbo refrigerator related to an embodiment of the present invention.
- FIG. 2 is a horizontal cross-sectional view of a turbo compressor related to the embodiment of the present invention.
- FIG. 3 is a horizontal cross-sectional view of a flow rate adjustment unit related to the embodiment of the present invention.
- FIG. 4 is a view which is viewed from the direction of an arrow A of FIG. 3 .
- FIG. 1 is a block diagram showing a schematic configuration of a turbo refrigerator S 1 in this embodiment.
- the turbo refrigerator S 1 in this embodiment is installed in a building, a factory, or the like in order to generate cooling water for air conditioning, for example. Then, the turbo refrigerator S 1 in this embodiment includes a condenser 1 , an economizer 2 , an evaporator 3 , and a turbo compressor 4 , as shown in FIG. 1 .
- Compressed refrigerant gas X 1 that is a compressed gaseous refrigerant is supplied to the condenser 1 .
- the condenser 1 is a member which generates refrigerant liquid X 2 by cooling and liquefying the compressed refrigerant gas X 1 .
- the condenser 1 is connected to the turbo compressor 4 through a flow path R 1 , in which the compressed refrigerant gas X 1 flows, and connected to the economizer 2 through a flow path R 2 , in which the refrigerant liquid X 2 flows.
- an expansion valve 5 for decompressing the refrigerant liquid X 2 is provided.
- the economizer 2 is a member which temporarily stores the refrigerant liquid X 2 decompressed in the expansion valve 5 .
- the economizer 2 is connected to the evaporator 3 through a flow path R 3 , in which the refrigerant liquid X 2 flows, and connected to the turbo compressor 4 through a flow path R 4 , in which a gas-phase component X 3 of the refrigerant generated in the economizer 2 flows.
- an expansion valve 6 for further decompressing the refrigerant liquid X 2 is provided at the flow path R 3 .
- the flow path R 4 is connected to the turbo compressor 4 so as to supply the gas-phase component X 3 to a second compression stage 22 which is included in the turbo compressor 4 and will be described later.
- the evaporator 3 is a member which cools a cooling object such as water or the like by evaporating the refrigerant liquid X 2 , thereby taking heat of vaporization away from the cooling object.
- the evaporator 3 is connected to the turbo compressor 4 through a flow path R 5 , in which refrigerant gas X 4 that is generated by evaporation of the refrigerant liquid X 2 flows.
- the flow path R 5 is connected to a first compression stage 21 which is included in the turbo compressor 4 and will be described later.
- the turbo compressor 4 is a member which compresses the refrigerant gas X 4 , thereby converting the refrigerant gas X 4 to the compressed refrigerant gas X 1 .
- This turbo compressor 4 is connected to the condenser 1 through the flow path R 1 , in which the compressed refrigerant gas X 1 flows, and connected to the evaporator 3 through the flow path R 5 in which the refrigerant gas X 4 flows, as described above.
- the compressed refrigerant gas X 1 supplied to the condenser 1 through the flow path R 1 is liquefied and cooled by the condenser 1 , thereby converting the compressed refrigerant gas X 1 to the refrigerant liquid X 2 .
- the refrigerant liquid X 2 is decompressed by the expansion valve 5 when being supplied to the economizer 2 through the flow path R 2 . Then, the refrigerant liquid X 2 is temporarily stored in the economizer 2 in a decompressed state and then further decompressed by the expansion valve 6 when being supplied to the evaporator 3 through the flow path R 3 . Then, the refrigerant liquid X 2 is supplied to the evaporator 3 in a further decompressed state.
- the refrigerant liquid X 2 supplied to the evaporator 3 is evaporated by the evaporator 3 , thereby converting the refrigerant liquid X 2 to the refrigerant gas X 4 , and then supplied to the turbo compressor 4 through the flow path R 5 .
- the refrigerant gas X 4 supplied to the turbo compressor 4 is compressed by the turbo compressor 4 , thereby converting the refrigerant gas X 4 to the compressed refrigerant gas X 1 , and supplied again to the condenser 1 through the flow path R 1 .
- the gas-phase component X 3 of the refrigerant generated when the refrigerant liquid X 2 is stored in the economizer 2 is supplied to the turbo compressor 4 through the flow path R 4 . Then, the gas-phase component X 3 is compressed together with the refrigerant gas X 4 and then supplied to the condenser 1 through the flow path R 1 as the compressed refrigerant gas X 1 .
- cooling or refrigeration of the cooling object is performed by taking heat of vaporization away from the cooling object when the refrigerant liquid X 2 evaporates in the evaporator 3 .
- FIG. 2 is a horizontal cross-sectional view of the turbo compressor 4 in this embodiment.
- the turbo compressor 4 in this embodiment includes a motor unit 10 , a compressor unit 20 , and a gear unit 30 .
- the motor unit 10 includes a motor 12 which has an output shaft 11 and is a driving source for driving the compressor unit 20 , and a motor casing 13 which surrounds the motor 12 and in which the motor 12 is installed.
- the driving source which drives the compressor unit 20 is not limited to the motor 12 and, for example, an internal combustion engine is also acceptable.
- the output shaft 11 of the motor 12 is rotatably supported by a first bearing 14 and a second bearing 15 , which are fixed to the motor casing 13 .
- the compressor unit 20 includes the first compression stage 21 which inhales and compresses the refrigerant gas X 4 (refer to FIG. 1 ), the second compression stage 22 which further compresses the refrigerant gas X 4 compressed in the first compression stage 21 and then discharges it as the compressed refrigerant gas X 1 (refer to FIG. 1 ), and a rotating shaft 23 extending over the first compression stage 21 and the second compression stage 22 .
- the first compression stage 21 includes a first impeller 21 a (an impeller), which provides velocity energy with the refrigerant gas X 4 that is supplied from the thrust direction, and then discharges the refrigerant gas X 4 in the radial direction, a first diffuser 21 b which compresses the refrigerant gas X 4 by converting the velocity energy provided with the refrigerant gas X 4 by the first impeller 21 a into pressure energy, and a first scroll chamber 21 c which leads the refrigerant gas X 4 compressed by the first diffuser 21 b to the outside of the first compression stage 21 .
- the first diffuser 21 b and the first scroll chamber 21 c are formed by a first impeller casing 21 e which surrounds the first impeller 21 a.
- the first impeller 21 a is fixed to the rotating shaft 23 . Then, the first impeller 21 a is rotated by transmitting the rotative power of the motor 12 to the rotating shaft 23 .
- the first compression stage 21 includes a flow rate adjustment unit 40 which adjusts the flow rate of the refrigerant gas X 4 which is introduced into the first impeller 21 a .
- the flow rate adjustment unit 40 is fixed to the first impeller casing 21 e in an airtight manner.
- the flow rate adjustment unit 40 has an intake port 41 for the refrigerant gas X 4 .
- the intake port 41 penetrates toward the axial direction of the rotating shaft 23 .
- FIG. 3 is a horizontal cross-sectional view of the flow rate adjustment unit 40 in the present embodiment.
- FIG. 4 is a view which is viewed from the direction of an arrow A of FIG. 3 .
- the first impeller 21 a and the rotating shaft 23 are represented by an imaginary line.
- the flow rate adjustment unit 40 includes a flow rate adjustment section 42 , a driving section 43 , a power transmission shaft 44 , and an intake frame 45 (a frame).
- the flow rate adjustment section 42 is a member which adjusts the flow rate of the refrigerant gas X 4 (refer to FIG. 1 ) which is introduced into the first impeller 21 a , and has a plurality of vanes 42 a , which are blade members.
- the plurality of vanes 42 a is rotatably provided at a vane frame 42 b formed into an approximately circular shape, and disposed side by side in the circumferential direction at the inner circumferential surface side of the vane frame 42 b .
- the inner circumferential surface side of the vane frame 42 b forms a portion of the intake port 41 .
- the plurality of vanes 42 a rotates in synchronization with each other, whereby the apparent area from the upstream side of the intake port 41 is adjusted.
- the vane frame 42 b is fixed to the intake frame 45 by a plurality of screw members 42 c.
- a driving-side crank arm 42 d is fixed to one of the plurality of vanes 42 a .
- the driving-side crank arm 42 d is provided at the outer circumferential surface side of the vane frame 42 b and connected to the power transmission shaft 44 .
- the driving-side crank arm 42 d is connected to a driving ring 42 f through a driving-side rod 42 e .
- the driving-side crank arm 42 d has an arm portion which protrudes in a direction intersecting the rotation axis of the driving-side crank arm 42 d , and the driving-side rod 42 e is connected to the arm portion.
- the driving ring 42 f rotates the plurality of vanes 42 a in a synchronized manner, is formed into an annular shape, and is provided to surround the vane frame 42 b .
- the driving ring 42 f is rotatably provided at the outer circumferential surface side of the vane frame 42 b through a plurality of rolling elements 42 g.
- the driving ring 42 f is connected to each of a plurality of driven-side crank arms 42 i through each of a plurality of driven-side rods 42 h .
- the driven-side crank arm 42 i has an arm portion which protrudes in a direction intersecting the rotation axis of the driven-side crank arms 42 i , and the driven-side rod 42 h is connected to the arm portion.
- the plurality of vanes 42 a is respectively fixed to the plurality of driven-side crank arms 42 i.
- the driving section 43 is a motor which generates power for driving the flow rate adjustment section 42 .
- the driving section 43 is fixed to the intake frame 45 through a bracket 46 .
- a second output shaft 43 a (an output shaft) which outputs the power of the driving section 43 is provided to protrude therefrom.
- the driving section 43 is not limited to a motor and for example, a driving section using hydraulic pressure or pneumatic pressure is also acceptable.
- the power transmission shaft 44 is a shaft member for transmitting the power generated by the driving section 43 to the flow rate adjustment section 42 .
- the end portion on the driving section 43 side of the power transmission shaft 44 is connected to the second output shaft 43 a of the driving section 43 through a connection plate 46 a (a connection section) which is provided in the bracket 46 .
- the end portion on the flow rate adjustment section 42 side of the power transmission shaft 44 is connected to the driving-side crank arm 42 d , as described above.
- a hole portion for connection is formed and the power transmission shaft 44 is inserted into the hole portion for connection, thereby being connected to the driving-side crank arm 42 d .
- a key member 44 a is fixed to the end portion on the flow rate adjustment section 42 side of the power transmission shaft 44 and a groove portion corresponding to the key member 44 a is formed in the hole portion for connection of the driving-side crank arm 42 d.
- the intake frame 45 is provided to surround the flow rate adjustment section 42 and is a member for fixing the flow rate adjustment section 42 or the driving section 43 to the first impeller casing 21 e (refer to FIG. 2 ).
- an opening portion 45 a an intake port which forms a portion of the intake port 41 is formed.
- the intake frame 45 is provided in an annular shape to surround the flow rate adjustment section 42 and also has an outer diameter which is reduced as it becomes more distant from the first impeller 21 a . For this reason, compared to a case where the intake frame 45 is formed into, for example, a cylindrical shape, the intake frame 45 is reduced in size and made lighter in weight.
- a hole portion 45 b in which the power transmission shaft 44 is provided passing through, is formed. That is, the power transmission shaft 44 is provided by passing through the hole portion 45 b so as to come into contact with the hole portion 45 b and connects the flow rate adjustment section 42 and the driving section 43 , which are respectively provided inside and outside the intake frame 45 .
- the power transmission shaft 44 can be connected to the flow rate adjustment section 42 by passing the power transmission shaft 44 through the hole portion 45 b before the intake frame 45 in which the flow rate adjustment section 42 is installed is fixed to the first impeller casing 21 e . That is, it is possible to assemble the flow rate adjustment section 42 and the power transmission shaft 44 while checking a connection place of the driving-side crank arm 42 d of the flow rate adjustment section 42 and the power transmission shaft 44 from the outside. For this reason, the power transmission shaft 44 to which the key member 44 a fixed can be easily inserted into the hole portion for connection of the driving-side crank arm 42 d . Accordingly, the assembly workability of the flow rate adjustment section 42 and the power transmission shaft 44 is improved.
- connection plate 46 a the driving section 43 is fixed to the intake frame 45 through the bracket 46 . Since the above-mentioned connection and fixing can be easily performed, work to fix the driving section 43 to the intake frame 45 may be performed either before or after the intake frame 45 is fixed to the first impeller casing 21 e.
- the flow rate adjustment unit 40 includes a packing 45 c (a seal member), which keeps in an airtight manner the hole portion 45 b , in which the power transmission shaft 44 is provided passing through, between the power transmission shaft 44 and the bracket 46 .
- a packing 45 c for example, a V-packing can be used.
- the intake frame 45 has a flange portion 45 d . Then, the intake frame 45 is fixed to the first impeller casing 21 e by screw members (not shown) which are provided to penetrate the flange portion 45 d . Also, in order to keep a connection portion between the flange portion 45 d and the first impeller casing 21 e in an airtight manner, an annular flange packing 45 e is provided at the flange portion 45 d.
- an oil thrower plate 47 is provided at the flow rate adjustment unit 40 and the oil thrower plate 47 is fixed to the vane frame 42 b of the flow rate adjustment section 42 .
- the oil thrower plate 47 is a member that prevents a lubricant of a mist shape, which flows into the inside of the intake frame 45 through a pressure equalizing tube (not shown) connecting the intake frame 45 and an oil tank 34 (refer to FIG. 2 ) which will be described later, from flowing to the first impeller 21 a side.
- the second compression stage 22 includes a second impeller 22 a which provides velocity energy with the refrigerant gas X 4 that is compressed in the first compression stage 21 and then supplied from the thrust direction, and then discharges the refrigerant gas X 4 in the radial direction, a second diffuser 22 b which compresses the refrigerant gas X 4 by converting the velocity energy provided with the refrigerant gas X 4 by the second impeller 22 a into pressure energy and then discharges it as the compressed refrigerant gas X 1 , a second scroll chamber 22 c which leads the compressed refrigerant gas X 1 discharged from the second diffuser 22 b to the outside of the second compression stage 22 , and an introduction scroll chamber 22 d which introduces the refrigerant gas X 4 compressed in the first compression stage 21 into the second impeller 22 a.
- a second impeller 22 a which provides velocity energy with the refrigerant gas X 4 that is compressed in the first compression stage 21 and then supplied from the thrust direction, and then discharges
- the second diffuser 22 b , the second scroll chamber 22 c , and the introduction scroll chamber 22 d are formed by a second impeller casing 22 e which surrounds the second impeller 22 a.
- the second impeller 22 a is fixed to the rotating shaft 23 so as to face the first impeller 21 a . Then, the second impeller 22 a is rotated by transmitting the rotative power of the motor 12 to the rotating shaft 23 .
- the second scroll chamber 22 c is connected to the flow path R 1 (refer to FIG. 1 ) for supplying the compressed refrigerant gas X 1 to the condenser 1 and supplies the compressed refrigerant gas X 1 derived from the second compression stage 22 to the flow path R 1 .
- first scroll chamber 21 c of the first compression stage 21 and the introduction scroll chamber 22 d of the second compression stage 22 are connected to each other through an external piping (not shown) which is provided separately from the first compression state 21 and the second compression stage 22 .
- the refrigerant gas X 4 compressed in the first compression stage 21 is supplied to the second compression stage 22 through the external piping.
- the above-described flow path R 4 (refer to FIG. 1 ) is connected to the external piping, so that the gas-phase component X 3 of the refrigerant generated in the economizer 2 is supplied to the second compression stage 22 through the external piping.
- the rotating shaft 23 is rotatably supported by a third bearing 26 which is fixed to the second impeller casing 22 e in a space 25 between the first compression stage 21 and the second compression stage 22 , and a fourth bearing 27 which is fixed to the gear unit 30 side of the second impeller casing 22 e.
- the gear unit 30 is a member for transmitting the rotative power of the motor 12 to the rotating shaft 23 and includes a spur gear 31 which is fixed to the output shaft 11 , a pinion gear 32 which is fixed to the rotating shaft 23 and also engaged with the spur gear 31 , and a gear casing 33 which houses the spur gear 31 and the pinion gear 32 .
- the spur gear 31 has a larger outer diameter than the pinion gear 32 . Then, by cooperation of the spur gear 31 and the pinion gear 32 , the rotative power of the motor 12 is transmitted to the rotating shaft 23 such that the number of rotations of the rotating shaft 23 increases with respect to the number of rotations of the output shaft 11 .
- the gear casing 33 is formed separately from the motor casing 13 and the second impeller casing 22 e . Then, the gear casing 33 is a member which connects the motor casing 13 and the second impeller casing 22 e . In the inside of the gear casing 33 , a housing space 33 a for housing the spur gear 31 and the pinion gear 32 is formed.
- the oil tank 34 in which a lubricant that is supplied to sliding portions of the turbo compressor 4 is collected and stored, is provided.
- the rotative power of the motor 12 is transmitted to the rotating shaft 23 through the spur gear 31 and the pinion gear 32 . Then, the first impeller 21 a and the second impeller 22 a of the compressor unit 20 are rotated.
- the intake port 41 of the flow rate adjustment unit 40 is made to be in a negative pressure state, so that the refrigerant gas X 4 flows from the flow path R 5 into the first compression stage 21 through the intake port 41 .
- the compression performance of the turbo compressor 4 and the cooling and refrigeration performance or the like of the turbo refrigerator S 1 can be adjusted. More specifically, first, the driving section 43 operates, so that the second output shaft 43 a and the power transmission shaft 44 are rotated. By the rotation of the power transmission shaft 44 , the driving-side crank arm 42 d is rotated, so that one vane 42 a fixed to the driving-side crank arm 42 d rotates. Also, by the rotation of the driving-side crank arm 42 d , the driving ring 42 f which is connected to the driving-side crank arm 42 d through the driving-side rod 42 e is rotated.
- the plurality of driven-side crank arms 42 i which is connected to each other through the plurality of driven-side rods 42 h is rotated, so that the vanes 42 a respectively fixed to the driven-side crank arms 42 i are also rotated.
- the plurality of vanes 42 a are rotated in synchronization with each other by the operation of the driving section 43 , so that the apparent area from the upstream side of the intake port 41 can be adjusted. Accordingly, the flow rate of the refrigerant gas X 4 which passes through the intake port 41 can be adjusted by the operation of the driving section 43 .
- the refrigerant gas X 4 which has flowed into the inside of the first compression stage 21 by passing through the intake port 41 flows into the first impeller 21 a from the thrust direction and is then discharged in the radial direction with the velocity energy provided by the first impeller 21 a.
- the refrigerant gas X 4 discharged from the first impeller 21 a is compressed by conversion of the velocity energy into the pressure energy by the first diffuser 21 b.
- the refrigerant gas X 4 discharged from the first diffuser 21 b is led to the outside of the first compression stage 21 through the first scroll chamber 21 c.
- the refrigerant gas X 4 led to the outside of the first compression stage 21 is supplied to the second compression stage 22 through the external piping (not shown).
- the refrigerant gas X 4 supplied to the second compression stage 22 flows into the second impeller 22 a from the thrust direction through the introduction scroll chamber 22 d and is then discharged in the radial direction with the velocity energy provided by the second impeller 22 a.
- the refrigerant gas X 4 discharged from the second impeller 22 a is further compressed by conversion of the velocity energy into the pressure energy by the second diffuser 22 b , thereby converting the refrigerant gas X 4 to the compressed refrigerant gas X 1 .
- the compressed refrigerant gas X 1 discharged from the second diffuser 22 b is led to the outside of the second compression stage 22 through the second scroll chamber 22 c.
- the compressed refrigerant gas X 1 led to the outside of the second compression stage 22 is supplied to the condenser 1 through the flow path R 1 .
- the intake frame 45 in the above-described embodiment has an outer diameter which is reduced as it becomes more distant from the first impeller 21 a .
- the intake frame 45 may be formed into, for example, a cylindrical shape.
- turbo compressor 4 in the above-described embodiment is used in the turbo refrigerator S 1 .
- turbo compressor 4 in the above-described embodiment may be used as, for example, a supercharger which supplies compressed air to an internal combustion engine.
Abstract
A turbo compressor according to the present invention includes: a flow rate adjustment section which adjusts the flow rate of gas that is introduced into an impeller; a driving section which drives the flow rate adjustment section; and a power transmission shaft which transmits power that is generated by the driving section to the flow rate adjustment section, wherein the turbo compressor further includes a frame which is provided to surround the flow rate adjustment section, and the frame has an intake port for gas that is introduced into the impeller and a hole portion in which the power transmission shaft is provided passing through.
Description
- 1. Field of the Invention
- The present invention relates to a turbo compressor and a turbo refrigerator. Priority is claimed on Japanese Patent Application No. 2010-053737, filed on Mar. 10, 2010, the contents of which are incorporated herein by reference.
- 2. Description of Related Art
- As a refrigerator which cools or refrigerates a cooling object such as water or the like, a turbo refrigerator which is provided with a turbo compressor that compresses and discharges refrigerant gas is known. In the turbo compressor of such a turbo refrigerator, there is a case where a flow rate adjustment unit that adjusts the flow rate of the refrigerant gas that is introduced into a rotating impeller is provided, as shown in, for example, Japanese Unexamined Patent Application Publication No. 2007-177695. It is possible to adjust the compression performance of the turbo compressor and the cooling and refrigeration performance or the like of the turbo refrigerator by adjusting the flow rate of the refrigerant gas by the flow rate adjustment unit. The flow rate adjustment unit includes a flow rate adjustment section which is provided with a plurality of vanes (blades), a driving section such as a motor or the like which drives the flow rate adjustment section, and a power transmission shaft which transmits power that is generated by the driving section to the flow rate adjustment section.
- Incidentally, the power transmission shaft is provided passing through a hole portion which is formed in a casing of the turbo compressor, and connects the flow rate adjustment section and the driving section, which are respectively provided inside and outside the casing. In the case of assembling the flow rate adjustment section and the power transmission shaft, it is necessary to first install the flow rate adjustment section in the inside of the casing and then connect the power transmission shaft to the flow rate adjustment section by passing the power transmission shaft through the hole portion.
- However, since a connection place of the flow rate adjustment section installed inside the casing and the power transmission shaft cannot be checked from the outside, work to assemble the flow rate adjustment section and the power transmission shaft is difficult, so that the assembly workability is lowered. As a result, the labor hours and cost involved in the manufacturing of the turbo compressor and the turbo refrigerator, which are provided with the flow rate adjustment section and the power transmission shaft, increase.
- The present invention has been made in consideration of the circumstances as mentioned above and has an object of providing a turbo compressor and a turbo refrigerator, which improve the assembly workability of a flow rate adjustment section and a power transmission shaft, thereby allowing, the labor hours and cost of the manufacturing to be reduced.
- In order to solve the above-mentioned problems, the present invention adopts the following means.
- A turbo compressor according to a first aspect of the present invention includes: a flow rate adjustment section which adjusts the flow rate of gas that is introduced into an impeller; a driving section which drives the flow rate adjustment section; and a power transmission shaft which transmits power that is generated by the driving section to the flow rate adjustment section, wherein the turbo compressor further includes a frame which is provided to surround the flow rate adjustment section, and the frame has an intake port for gas that is introduced into the impeller and a hole portion in which the power transmission shaft is provided passing through.
- According to the first aspect of the present invention, the power transmission shaft is provided passing through the hole portion which is formed in the frame, and connects the flow rate adjustment section and the driving section, which are respectively provided inside and outside the frame. In the case of assembling the flow rate adjustment section and the power transmission shaft, before the frame is fixed to a casing of the turbo compressor, the power transmission shaft is connected to the flow rate adjustment section by passing the power transmission shaft through the hole portion of the frame. That is, it is possible to assemble the flow rate adjustment section and the power transmission shaft while checking a connection place of the flow rate adjustment section and the power transmission shaft from the outside, so that the assembly workability of the flow rate adjustment section and the power transmission shaft is improved.
- Also, in the turbo compressor according to a second aspect of the present invention, the frame is provided in an annular shape to surround the flow rate adjustment section and has an outer diameter which is reduced as it becomes more distant from the impeller.
- Also, the turbo compressor according to a third aspect of the present invention further includes a connection section which connects an output shaft which outputs the power of the driving section and the power transmission shaft.
- Also, the turbo compressor according to a fourth aspect of the present invention further includes a seal member which keeps the hole portion, in which the power transmission shaft is provided passing through, in an airtight manner.
- Also, a turbo refrigerator according to a fifth aspect of the present invention includes: a condenser which cools and liquefies a compressed refrigerant; an evaporator which cools a cooling object by evaporating the liquefied refrigerant, thereby taking heat of vaporization away from the cooling object; and a compressor which compresses the refrigerant evaporated in the evaporator and then supplies the compressed refrigerant to the condenser, wherein the turbo refrigerator is provided with the turbo compressor according to any one of the first to fourth aspects of the present invention as the compressor.
- According to the present invention, the following effects can be obtained.
- According to the present invention, it is possible to assemble the flow rate adjustment section and the power transmission shaft while checking a connection place of the flow rate adjustment section and the power transmission shaft from the outside, so that the assembly workability of the flow rate adjustment section and the power transmission shaft is improved. Accordingly, the labor hours and cost involved in the manufacturing of the turbo compressor and the turbo refrigerator, each of which is provided with the flow rate adjustment section and the power transmission shaft, can be reduced.
-
FIG. 1 is a block diagram showing a schematic configuration of a turbo refrigerator related to an embodiment of the present invention. -
FIG. 2 is a horizontal cross-sectional view of a turbo compressor related to the embodiment of the present invention. -
FIG. 3 is a horizontal cross-sectional view of a flow rate adjustment unit related to the embodiment of the present invention. -
FIG. 4 is a view which is viewed from the direction of an arrow A ofFIG. 3 . - Hereinafter, an embodiment of the present invention will be described with reference to
FIGS. 1 to 4 . In addition, in the respective drawings which are used in the following description, in order to make each member a recognizable size, the scale of each member is appropriately changed. -
FIG. 1 is a block diagram showing a schematic configuration of a turbo refrigerator S1 in this embodiment. - The turbo refrigerator S1 in this embodiment is installed in a building, a factory, or the like in order to generate cooling water for air conditioning, for example. Then, the turbo refrigerator S1 in this embodiment includes a condenser 1, an
economizer 2, an evaporator 3, and aturbo compressor 4, as shown inFIG. 1 . - Compressed refrigerant gas X1 that is a compressed gaseous refrigerant is supplied to the condenser 1. Then, the condenser 1 is a member which generates refrigerant liquid X2 by cooling and liquefying the compressed refrigerant gas X1. As shown in
FIG. 1 , the condenser 1 is connected to theturbo compressor 4 through a flow path R1, in which the compressed refrigerant gas X1 flows, and connected to theeconomizer 2 through a flow path R2, in which the refrigerant liquid X2 flows. In addition, at the flow path R2, an expansion valve 5 for decompressing the refrigerant liquid X2 is provided. - The
economizer 2 is a member which temporarily stores the refrigerant liquid X2 decompressed in the expansion valve 5. Theeconomizer 2 is connected to the evaporator 3 through a flow path R3, in which the refrigerant liquid X2 flows, and connected to theturbo compressor 4 through a flow path R4, in which a gas-phase component X3 of the refrigerant generated in theeconomizer 2 flows. In addition, at the flow path R3, an expansion valve 6 for further decompressing the refrigerant liquid X2 is provided. Also, the flow path R4 is connected to theturbo compressor 4 so as to supply the gas-phase component X3 to asecond compression stage 22 which is included in theturbo compressor 4 and will be described later. - The evaporator 3 is a member which cools a cooling object such as water or the like by evaporating the refrigerant liquid X2, thereby taking heat of vaporization away from the cooling object. The evaporator 3 is connected to the
turbo compressor 4 through a flow path R5, in which refrigerant gas X4 that is generated by evaporation of the refrigerant liquid X2 flows. In addition, the flow path R5 is connected to afirst compression stage 21 which is included in theturbo compressor 4 and will be described later. - The
turbo compressor 4 is a member which compresses the refrigerant gas X4, thereby converting the refrigerant gas X4 to the compressed refrigerant gas X1. Thisturbo compressor 4 is connected to the condenser 1 through the flow path R1, in which the compressed refrigerant gas X1 flows, and connected to the evaporator 3 through the flow path R5 in which the refrigerant gas X4 flows, as described above. - In the turbo refrigerator S1 having the above-described configuration, the compressed refrigerant gas X1 supplied to the condenser 1 through the flow path R1 is liquefied and cooled by the condenser 1, thereby converting the compressed refrigerant gas X1 to the refrigerant liquid X2.
- The refrigerant liquid X2 is decompressed by the expansion valve 5 when being supplied to the
economizer 2 through the flow path R2. Then, the refrigerant liquid X2 is temporarily stored in theeconomizer 2 in a decompressed state and then further decompressed by the expansion valve 6 when being supplied to the evaporator 3 through the flow path R3. Then, the refrigerant liquid X2 is supplied to the evaporator 3 in a further decompressed state. - The refrigerant liquid X2 supplied to the evaporator 3 is evaporated by the evaporator 3, thereby converting the refrigerant liquid X2 to the refrigerant gas X4, and then supplied to the
turbo compressor 4 through the flow path R5. - The refrigerant gas X4 supplied to the
turbo compressor 4 is compressed by theturbo compressor 4, thereby converting the refrigerant gas X4 to the compressed refrigerant gas X1, and supplied again to the condenser 1 through the flow path R1. - In addition, the gas-phase component X3 of the refrigerant generated when the refrigerant liquid X2 is stored in the
economizer 2 is supplied to theturbo compressor 4 through the flow path R4. Then, the gas-phase component X3 is compressed together with the refrigerant gas X4 and then supplied to the condenser 1 through the flow path R1 as the compressed refrigerant gas X1. - Then, in the turbo refrigerator S1 having the above-described configuration, cooling or refrigeration of the cooling object is performed by taking heat of vaporization away from the cooling object when the refrigerant liquid X2 evaporates in the evaporator 3.
- Subsequently, the
turbo compressor 4 having characteristic portions of this embodiment will be described in more detail.FIG. 2 is a horizontal cross-sectional view of theturbo compressor 4 in this embodiment. - As shown in
FIG. 2 , theturbo compressor 4 in this embodiment includes amotor unit 10, acompressor unit 20, and agear unit 30. - The
motor unit 10 includes amotor 12 which has anoutput shaft 11 and is a driving source for driving thecompressor unit 20, and amotor casing 13 which surrounds themotor 12 and in which themotor 12 is installed. In addition, the driving source which drives thecompressor unit 20 is not limited to themotor 12 and, for example, an internal combustion engine is also acceptable. - The
output shaft 11 of themotor 12 is rotatably supported by afirst bearing 14 and asecond bearing 15, which are fixed to themotor casing 13. - The
compressor unit 20 includes thefirst compression stage 21 which inhales and compresses the refrigerant gas X4 (refer toFIG. 1 ), thesecond compression stage 22 which further compresses the refrigerant gas X4 compressed in thefirst compression stage 21 and then discharges it as the compressed refrigerant gas X1 (refer toFIG. 1 ), and arotating shaft 23 extending over thefirst compression stage 21 and thesecond compression stage 22. - The
first compression stage 21 includes afirst impeller 21 a (an impeller), which provides velocity energy with the refrigerant gas X4 that is supplied from the thrust direction, and then discharges the refrigerant gas X4 in the radial direction, afirst diffuser 21 b which compresses the refrigerant gas X4 by converting the velocity energy provided with the refrigerant gas X4 by thefirst impeller 21 a into pressure energy, and afirst scroll chamber 21 c which leads the refrigerant gas X4 compressed by thefirst diffuser 21 b to the outside of thefirst compression stage 21. Thefirst diffuser 21 b and thefirst scroll chamber 21 c are formed by afirst impeller casing 21 e which surrounds thefirst impeller 21 a. - The
first impeller 21 a is fixed to therotating shaft 23. Then, thefirst impeller 21 a is rotated by transmitting the rotative power of themotor 12 to therotating shaft 23. - Also, the
first compression stage 21 includes a flowrate adjustment unit 40 which adjusts the flow rate of the refrigerant gas X4 which is introduced into thefirst impeller 21 a. The flowrate adjustment unit 40 is fixed to thefirst impeller casing 21 e in an airtight manner. Also, the flowrate adjustment unit 40 has anintake port 41 for the refrigerant gas X4. Theintake port 41 penetrates toward the axial direction of therotating shaft 23. - Here, the flow
rate adjustment unit 40 of this embodiment will be described in more detail.FIG. 3 is a horizontal cross-sectional view of the flowrate adjustment unit 40 in the present embodiment. Also,FIG. 4 is a view which is viewed from the direction of an arrow A ofFIG. 3 . In addition, for explanation, inFIG. 3 , thefirst impeller 21 a and therotating shaft 23 are represented by an imaginary line. - As shown in
FIGS. 3 and 4 , the flowrate adjustment unit 40 includes a flowrate adjustment section 42, a drivingsection 43, apower transmission shaft 44, and an intake frame 45 (a frame). - The flow
rate adjustment section 42 is a member which adjusts the flow rate of the refrigerant gas X4 (refer toFIG. 1 ) which is introduced into thefirst impeller 21 a, and has a plurality ofvanes 42 a, which are blade members. The plurality ofvanes 42 a is rotatably provided at avane frame 42 b formed into an approximately circular shape, and disposed side by side in the circumferential direction at the inner circumferential surface side of thevane frame 42 b. The inner circumferential surface side of thevane frame 42 b forms a portion of theintake port 41. For this reason, the plurality ofvanes 42 a rotates in synchronization with each other, whereby the apparent area from the upstream side of theintake port 41 is adjusted. In addition, thevane frame 42 b is fixed to theintake frame 45 by a plurality ofscrew members 42 c. - A driving-side crank
arm 42 d is fixed to one of the plurality ofvanes 42 a. The driving-side crankarm 42 d is provided at the outer circumferential surface side of thevane frame 42 b and connected to thepower transmission shaft 44. Also, the driving-side crankarm 42 d is connected to a drivingring 42 f through a driving-side rod 42 e. The driving-side crankarm 42 d has an arm portion which protrudes in a direction intersecting the rotation axis of the driving-side crankarm 42 d, and the driving-side rod 42 e is connected to the arm portion. - The driving
ring 42 f rotates the plurality ofvanes 42 a in a synchronized manner, is formed into an annular shape, and is provided to surround thevane frame 42 b. The drivingring 42 f is rotatably provided at the outer circumferential surface side of thevane frame 42 b through a plurality of rollingelements 42 g. - Also, the driving
ring 42 f is connected to each of a plurality of driven-side crankarms 42 i through each of a plurality of driven-side rods 42 h. The driven-side crankarm 42 i has an arm portion which protrudes in a direction intersecting the rotation axis of the driven-side crankarms 42 i, and the driven-side rod 42 h is connected to the arm portion. The plurality ofvanes 42 a is respectively fixed to the plurality of driven-side crankarms 42 i. - The driving
section 43 is a motor which generates power for driving the flowrate adjustment section 42. The drivingsection 43 is fixed to theintake frame 45 through abracket 46. At thedriving section 43, asecond output shaft 43 a (an output shaft) which outputs the power of the drivingsection 43 is provided to protrude therefrom. In addition, the drivingsection 43 is not limited to a motor and for example, a driving section using hydraulic pressure or pneumatic pressure is also acceptable. - The
power transmission shaft 44 is a shaft member for transmitting the power generated by the drivingsection 43 to the flowrate adjustment section 42. The end portion on the drivingsection 43 side of thepower transmission shaft 44 is connected to thesecond output shaft 43 a of the drivingsection 43 through aconnection plate 46 a (a connection section) which is provided in thebracket 46. - On the other hand, the end portion on the flow
rate adjustment section 42 side of thepower transmission shaft 44 is connected to the driving-side crankarm 42 d, as described above. In addition, in the driving-side crankarm 42 d, a hole portion for connection is formed and thepower transmission shaft 44 is inserted into the hole portion for connection, thereby being connected to the driving-side crankarm 42 d. Also, in order to make thepower transmission shaft 44 be engaged with the driving-side crankarm 42 d around the axis of thepower transmission shaft 44, akey member 44 a is fixed to the end portion on the flowrate adjustment section 42 side of thepower transmission shaft 44 and a groove portion corresponding to thekey member 44 a is formed in the hole portion for connection of the driving-side crankarm 42 d. - The
intake frame 45 is provided to surround the flowrate adjustment section 42 and is a member for fixing the flowrate adjustment section 42 or the drivingsection 43 to thefirst impeller casing 21 e (refer toFIG. 2 ). In theintake frame 45, an openingportion 45 a (an intake port) which forms a portion of theintake port 41 is formed. Also, theintake frame 45 is provided in an annular shape to surround the flowrate adjustment section 42 and also has an outer diameter which is reduced as it becomes more distant from thefirst impeller 21 a. For this reason, compared to a case where theintake frame 45 is formed into, for example, a cylindrical shape, theintake frame 45 is reduced in size and made lighter in weight. - In the
intake frame 45, ahole portion 45 b, in which thepower transmission shaft 44 is provided passing through, is formed. That is, thepower transmission shaft 44 is provided by passing through thehole portion 45 b so as to come into contact with thehole portion 45 b and connects the flowrate adjustment section 42 and the drivingsection 43, which are respectively provided inside and outside theintake frame 45. - In the case of assembling the flow
rate adjustment section 42 and thepower transmission shaft 44, thepower transmission shaft 44 can be connected to the flowrate adjustment section 42 by passing thepower transmission shaft 44 through thehole portion 45 b before theintake frame 45 in which the flowrate adjustment section 42 is installed is fixed to thefirst impeller casing 21 e. That is, it is possible to assemble the flowrate adjustment section 42 and thepower transmission shaft 44 while checking a connection place of the driving-side crankarm 42 d of the flowrate adjustment section 42 and thepower transmission shaft 44 from the outside. For this reason, thepower transmission shaft 44 to which thekey member 44 a fixed can be easily inserted into the hole portion for connection of the driving-side crankarm 42 d. Accordingly, the assembly workability of the flowrate adjustment section 42 and thepower transmission shaft 44 is improved. - In addition, the
power transmission shaft 44 and thesecond output shaft 43 a are connected to each other by theconnection plate 46 a and the drivingsection 43 is fixed to theintake frame 45 through thebracket 46. Since the above-mentioned connection and fixing can be easily performed, work to fix thedriving section 43 to theintake frame 45 may be performed either before or after theintake frame 45 is fixed to thefirst impeller casing 21 e. - In order to prevent the refrigerant gas X4 from flowing out to the outside through the
hole portion 45 b, the flowrate adjustment unit 40 includes a packing 45 c (a seal member), which keeps in an airtight manner thehole portion 45 b, in which thepower transmission shaft 44 is provided passing through, between thepower transmission shaft 44 and thebracket 46. As the packing 45 c, for example, a V-packing can be used. - The
intake frame 45 has aflange portion 45 d. Then, theintake frame 45 is fixed to thefirst impeller casing 21 e by screw members (not shown) which are provided to penetrate theflange portion 45 d. Also, in order to keep a connection portion between theflange portion 45 d and thefirst impeller casing 21 e in an airtight manner, an annular flange packing 45 e is provided at theflange portion 45 d. - In addition, an
oil thrower plate 47 is provided at the flowrate adjustment unit 40 and theoil thrower plate 47 is fixed to thevane frame 42 b of the flowrate adjustment section 42. Theoil thrower plate 47 is a member that prevents a lubricant of a mist shape, which flows into the inside of theintake frame 45 through a pressure equalizing tube (not shown) connecting theintake frame 45 and an oil tank 34 (refer toFIG. 2 ) which will be described later, from flowing to thefirst impeller 21 a side. - Returning to
FIG. 2 , thesecond compression stage 22 includes asecond impeller 22 a which provides velocity energy with the refrigerant gas X4 that is compressed in thefirst compression stage 21 and then supplied from the thrust direction, and then discharges the refrigerant gas X4 in the radial direction, asecond diffuser 22 b which compresses the refrigerant gas X4 by converting the velocity energy provided with the refrigerant gas X4 by thesecond impeller 22 a into pressure energy and then discharges it as the compressed refrigerant gas X1, asecond scroll chamber 22 c which leads the compressed refrigerant gas X1 discharged from thesecond diffuser 22 b to the outside of thesecond compression stage 22, and anintroduction scroll chamber 22 d which introduces the refrigerant gas X4 compressed in thefirst compression stage 21 into thesecond impeller 22 a. - In addition, the
second diffuser 22 b, thesecond scroll chamber 22 c, and theintroduction scroll chamber 22 d are formed by a second impeller casing 22 e which surrounds thesecond impeller 22 a. - The
second impeller 22 a is fixed to therotating shaft 23 so as to face thefirst impeller 21 a. Then, thesecond impeller 22 a is rotated by transmitting the rotative power of themotor 12 to therotating shaft 23. - The
second scroll chamber 22 c is connected to the flow path R1 (refer toFIG. 1 ) for supplying the compressed refrigerant gas X1 to the condenser 1 and supplies the compressed refrigerant gas X1 derived from thesecond compression stage 22 to the flow path R1. - In addition, the
first scroll chamber 21 c of thefirst compression stage 21 and theintroduction scroll chamber 22 d of thesecond compression stage 22 are connected to each other through an external piping (not shown) which is provided separately from thefirst compression state 21 and thesecond compression stage 22. Then, the refrigerant gas X4 compressed in thefirst compression stage 21 is supplied to thesecond compression stage 22 through the external piping. The above-described flow path R4 (refer toFIG. 1 ) is connected to the external piping, so that the gas-phase component X3 of the refrigerant generated in theeconomizer 2 is supplied to thesecond compression stage 22 through the external piping. - The rotating
shaft 23 is rotatably supported by athird bearing 26 which is fixed to the second impeller casing 22 e in aspace 25 between thefirst compression stage 21 and thesecond compression stage 22, and afourth bearing 27 which is fixed to thegear unit 30 side of the second impeller casing 22 e. - The
gear unit 30 is a member for transmitting the rotative power of themotor 12 to therotating shaft 23 and includes aspur gear 31 which is fixed to theoutput shaft 11, apinion gear 32 which is fixed to therotating shaft 23 and also engaged with thespur gear 31, and agear casing 33 which houses thespur gear 31 and thepinion gear 32. - The
spur gear 31 has a larger outer diameter than thepinion gear 32. Then, by cooperation of thespur gear 31 and thepinion gear 32, the rotative power of themotor 12 is transmitted to therotating shaft 23 such that the number of rotations of therotating shaft 23 increases with respect to the number of rotations of theoutput shaft 11. In addition, it is not limited to the above-described transmission method and the diameters of a plurality of gears may be set such that the number of rotations of therotating shaft 23 is equal to or less than the number of rotations of theoutput shaft 11. - The
gear casing 33 is formed separately from themotor casing 13 and the second impeller casing 22 e. Then, thegear casing 33 is a member which connects themotor casing 13 and the second impeller casing 22 e. In the inside of thegear casing 33, ahousing space 33 a for housing thespur gear 31 and thepinion gear 32 is formed. - Also, at the
gear casing 33, theoil tank 34, in which a lubricant that is supplied to sliding portions of theturbo compressor 4 is collected and stored, is provided. - Subsequently, an operation of the
turbo compressor 4 in this embodiment will be described. - First, the rotative power of the
motor 12 is transmitted to therotating shaft 23 through thespur gear 31 and thepinion gear 32. Then, thefirst impeller 21 a and thesecond impeller 22 a of thecompressor unit 20 are rotated. - When the
first impeller 21 a rotates, theintake port 41 of the flowrate adjustment unit 40 is made to be in a negative pressure state, so that the refrigerant gas X4 flows from the flow path R5 into thefirst compression stage 21 through theintake port 41. - At this time, by adjusting the flow rate of the refrigerant gas X4 by the flow
rate adjustment unit 40, the compression performance of theturbo compressor 4 and the cooling and refrigeration performance or the like of the turbo refrigerator S1 can be adjusted. More specifically, first, the drivingsection 43 operates, so that thesecond output shaft 43 a and thepower transmission shaft 44 are rotated. By the rotation of thepower transmission shaft 44, the driving-side crankarm 42 d is rotated, so that onevane 42 a fixed to the driving-side crankarm 42 d rotates. Also, by the rotation of the driving-side crankarm 42 d, the drivingring 42 f which is connected to the driving-side crankarm 42 d through the driving-side rod 42 e is rotated. By the rotation of the drivingring 42 f, the plurality of driven-side crankarms 42 i which is connected to each other through the plurality of driven-side rods 42 h is rotated, so that thevanes 42 a respectively fixed to the driven-side crankarms 42 i are also rotated. In this way, the plurality ofvanes 42 a are rotated in synchronization with each other by the operation of the drivingsection 43, so that the apparent area from the upstream side of theintake port 41 can be adjusted. Accordingly, the flow rate of the refrigerant gas X4 which passes through theintake port 41 can be adjusted by the operation of the drivingsection 43. - The refrigerant gas X4 which has flowed into the inside of the
first compression stage 21 by passing through theintake port 41 flows into thefirst impeller 21 a from the thrust direction and is then discharged in the radial direction with the velocity energy provided by thefirst impeller 21 a. - The refrigerant gas X4 discharged from the
first impeller 21 a is compressed by conversion of the velocity energy into the pressure energy by thefirst diffuser 21 b. - The refrigerant gas X4 discharged from the
first diffuser 21 b is led to the outside of thefirst compression stage 21 through thefirst scroll chamber 21 c. - Then, the refrigerant gas X4 led to the outside of the
first compression stage 21 is supplied to thesecond compression stage 22 through the external piping (not shown). - The refrigerant gas X4 supplied to the
second compression stage 22 flows into thesecond impeller 22 a from the thrust direction through theintroduction scroll chamber 22 d and is then discharged in the radial direction with the velocity energy provided by thesecond impeller 22 a. - The refrigerant gas X4 discharged from the
second impeller 22 a is further compressed by conversion of the velocity energy into the pressure energy by thesecond diffuser 22 b, thereby converting the refrigerant gas X4 to the compressed refrigerant gas X1. - The compressed refrigerant gas X1 discharged from the
second diffuser 22 b is led to the outside of thesecond compression stage 22 through thesecond scroll chamber 22 c. - Then, the compressed refrigerant gas X1 led to the outside of the
second compression stage 22 is supplied to the condenser 1 through the flow path R1. - With that, the operation of the
turbo compressor 4 is ended. - According this embodiment, it is possible to assemble the flow
rate adjustment section 42 and thepower transmission shaft 44 while checking a connection place of the driving-side crankarm 42 d of the flowrate adjustment section 42 and thepower transmission shaft 44 from the outside, so that the assembly workability of the flowrate adjustment section 42 and thepower transmission shaft 44 is improved. Accordingly, the labor hours and cost involved in the manufacturing of theturbo compressor 4 and the turbo refrigerator S1, which are provided with the flowrate adjustment section 42 and thepower transmission shaft 44 according to the present invention, can be reduced. - Although the preferred embodiment of the present invention has been described above with reference to the accompanying drawings, the present invention is not limited to such an example. The shapes, combination, or the like of the respective constituent members shown in the above-described example is one example and various changes can be made on the basis of a design request or the like within the scope which does not depart from the gist of the present invention.
- For example, the
intake frame 45 in the above-described embodiment has an outer diameter which is reduced as it becomes more distant from thefirst impeller 21 a. However, it is not limited to the above-described configuration and theintake frame 45 may be formed into, for example, a cylindrical shape. - Also, the
turbo compressor 4 in the above-described embodiment is used in the turbo refrigerator S1. However, theturbo compressor 4 in the above-described embodiment may be used as, for example, a supercharger which supplies compressed air to an internal combustion engine.
Claims (16)
1. A turbo compressor comprising:
a flow rate adjustment section which adjusts the flow rate of gas that is introduced into an impeller;
a driving section which drives the flow rate adjustment section; and
a power transmission shaft which transmits power that is generated by the driving section to the flow rate adjustment section,
wherein the turbo compressor further includes a frame which is provided to surround the flow rate adjustment section, and the frame has an intake port for gas that is introduced into the impeller and a hole portion in which the power transmission shaft is provided passing through.
2. The turbo compressor according to claim 1 , wherein the frame is provided in an annular shape to surround the flow rate adjustment section and has an outer diameter which is reduced as it becomes more distant from the impeller.
3. The turbo compressor according to claim 1 , further comprising: a connection section which connects an output shaft which outputs the power of the driving section and the power transmission shaft.
4. The turbo compressor according to claim 2 , further comprising: a connection section which connects an output shaft which outputs the power of the driving section and the power transmission shaft.
5. The turbo compressor according to claim 1 , further comprising: a seal member which keeps the hole portion, in which the power transmission shaft is provided passing through, in an airtight manner.
6. The turbo compressor according to claim 2 , further comprising: a seal member which keeps the hole portion, in which the power transmission shaft is provided passing through, in an airtight manner.
7. The turbo compressor according to claim 3 , further comprising: a seal member which keeps the hole portion, in which the power transmission shaft is provided passing through, in an airtight manner.
8. The turbo compressor according to claim 4 , further comprising: a seal member which keeps the hole portion, in which the power transmission shaft is provided passing through, in an airtight manner.
9. A turbo refrigerator comprising:
a condenser which cools and liquefies a compressed refrigerant;
an evaporator which cools a cooling object by evaporating the liquefied refrigerant, thereby taking heat of vaporization away from the cooling object; and
a compressor which compresses the refrigerant evaporated in the evaporator and then supplies the compressed refrigerant to the condenser,
wherein the turbo refrigerator is provided with the turbo compressor according to claim 1 as the compressor.
10. A turbo refrigerator comprising:
a condenser which cools and liquefies a compressed refrigerant;
an evaporator which cools a cooling object by evaporating the liquefied refrigerant, thereby taking heat of vaporization away from the cooling object; and
a compressor which compresses the refrigerant evaporated in the evaporator and then supplies the compressed refrigerant to the condenser,
wherein the turbo refrigerator is provided with the turbo compressor according to claim 2 as the compressor.
11. A turbo refrigerator comprising:
a condenser which cools and liquefies a compressed refrigerant;
an evaporator which cools a cooling object by evaporating the liquefied refrigerant, thereby taking heat of vaporization away from the cooling object; and
a compressor which compresses the refrigerant evaporated in the evaporator and then supplies the compressed refrigerant to the condenser,
wherein the turbo refrigerator is provided with the turbo compressor according to claim 3 as the compressor.
12. A turbo refrigerator comprising:
a condenser which cools and liquefies a compressed refrigerant;
an evaporator which cools a cooling object by evaporating the liquefied refrigerant, thereby taking heat of vaporization away from the cooling object; and
a compressor which compresses the refrigerant evaporated in the evaporator and then supplies the compressed refrigerant to the condenser,
wherein the turbo refrigerator is provided with the turbo compressor according to claim 4 as the compressor.
13. A turbo refrigerator comprising:
a condenser which cools and liquefies a compressed refrigerant;
an evaporator which cools a cooling object by evaporating the liquefied refrigerant, thereby taking heat of vaporization away from the cooling object; and
a compressor which compresses the refrigerant evaporated in the evaporator and then supplies the compressed refrigerant to the condenser,
wherein the turbo refrigerator is provided with the turbo compressor according to claim 5 as the compressor.
14. A turbo refrigerator comprising:
a condenser which cools and liquefies a compressed refrigerant;
an evaporator which cools a cooling object by evaporating the liquefied refrigerant, thereby taking heat of vaporization away from the cooling object; and
a compressor which compresses the refrigerant evaporated in the evaporator and then supplies the compressed refrigerant to the condenser,
wherein the turbo refrigerator is provided with the turbo compressor according to claim 6 as the compressor.
15. A turbo refrigerator comprising:
a condenser which cools and liquefies a compressed refrigerant;
an evaporator which cools a cooling object by evaporating the liquefied refrigerant, thereby taking heat of vaporization away from the cooling object; and
a compressor which compresses the refrigerant evaporated in the evaporator and then supplies the compressed refrigerant to the condenser,
wherein the turbo refrigerator is provided with the turbo compressor according to claim 7 as the compressor.
16. A turbo refrigerator comprising:
a condenser which cools and liquefies a compressed refrigerant;
an evaporator which cools a cooling object by evaporating the liquefied refrigerant, thereby taking heat of vaporization away from the cooling object; and
a compressor which compresses the refrigerant evaporated in the evaporator and then supplies the compressed refrigerant to the condenser,
wherein the turbo refrigerator is provided with the turbo compressor according to claim 8 as the compressor.
Applications Claiming Priority (2)
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JPP2010-053737 | 2010-03-10 | ||
JP2010053737A JP2011185221A (en) | 2010-03-10 | 2010-03-10 | Turbo compressor and turbo refrigerator |
Publications (1)
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US20110219813A1 true US20110219813A1 (en) | 2011-09-15 |
Family
ID=44558633
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US13/043,704 Abandoned US20110219813A1 (en) | 2010-03-10 | 2011-03-09 | Turbo compressor and turbo refrigerator |
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US (1) | US20110219813A1 (en) |
JP (1) | JP2011185221A (en) |
CN (1) | CN102192148A (en) |
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US20140119890A1 (en) * | 2011-07-13 | 2014-05-01 | Ihi Corporation | Turbo-compressor |
US20220389937A1 (en) * | 2019-10-31 | 2022-12-08 | Daikin Industries, Ltd. | Inlet guide vane actuator assembly |
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- 2011-03-10 CN CN2011100571803A patent/CN102192148A/en active Pending
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20140119890A1 (en) * | 2011-07-13 | 2014-05-01 | Ihi Corporation | Turbo-compressor |
US9739289B2 (en) * | 2011-07-13 | 2017-08-22 | Daikin Industries, Ltd. | Turbo-compressor |
WO2013045052A3 (en) * | 2011-10-01 | 2013-06-20 | Daimler Ag | Electric turbocharger for supplying air to a fuel cell |
US20220389937A1 (en) * | 2019-10-31 | 2022-12-08 | Daikin Industries, Ltd. | Inlet guide vane actuator assembly |
US11885351B2 (en) * | 2019-10-31 | 2024-01-30 | Daikin Industries, Ltd. | Inlet guide vane actuator assembly |
Also Published As
Publication number | Publication date |
---|---|
JP2011185221A (en) | 2011-09-22 |
CN102192148A (en) | 2011-09-21 |
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Legal Events
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Owner name: IHI CORPORATION, JAPAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:KURIHARA, KAZUAKI;SUGITANI, NORIYASU;REEL/FRAME:026228/0479 Effective date: 20110408 |
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Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |