US20110243710A1 - Turbo compressor and turbo refrigerator - Google Patents
Turbo compressor and turbo refrigerator Download PDFInfo
- Publication number
- US20110243710A1 US20110243710A1 US13/074,310 US201113074310A US2011243710A1 US 20110243710 A1 US20110243710 A1 US 20110243710A1 US 201113074310 A US201113074310 A US 201113074310A US 2011243710 A1 US2011243710 A1 US 2011243710A1
- Authority
- US
- United States
- Prior art keywords
- lubricant
- passage
- oil tank
- control valve
- turbo
- 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
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
- F04D25/04—Units comprising pumps and their driving means the pump being fluid-driven
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/06—Lubrication
- F04D29/063—Lubrication specially adapted for elastic fluid pumps
Definitions
- the present invention relates to a turbo compressor and a turbo refrigerator.
- a turbo refrigerator including a turbo compressor compressing a refrigerant through the rotation of an impeller and discharging the compressed refrigerant.
- the turbo compressor included in the turbo refrigerator includes sliding positions for bearings or gears sliding on the corresponding members with an operation of a drive unit such as a motor.
- the turbo compressor includes a lubricant supply structure which supplies a lubricant for lubricating the sliding positions.
- the lubricant supply structure includes an oil tank which stores the lubricant and a pump sending the lubricant toward the sliding positions.
- the lubricant supply structure may include a control valve that adjusts the flow rate of the lubricant supplied to the sliding positions.
- the control valve is installed in a passage dividing the stream of the lubricant sent from the pump and returning to the oil tank.
- the present invention has been made in view of such circumstances, and an object thereof is to provide a turbo compressor capable of decreasing the number of components connected to a control valve, and a turbo refrigerator including the turbo compressor.
- the present invention adopts the following configurations.
- a turbo compressor including: a pump which sends lubricant stored in an oil tank having an open portion; a control valve which adjusts the flow rate of the lubricant returning to the oil tank by dividing the stream of the lubricant sent from the pump; and an oil tank cover which blocks the open portion and is provided with an installation portion for the control valve, wherein the oil tank cover includes at least one of a first passage opened from the installation portion and allowing the stream of the lubricant sent from the pump to be divided and flow toward the control valve and a second passage opened from the installation portion and allowing the lubricant to flow from the control valve toward the oil tank.
- the present invention since at least one of the first passage and the second passage is opened from the installation portion, when the control valve is installed at the installation portion, at least one of the first passage and the second passage is directly connected to the control valve.
- turbo compressor according to the present invention further includes an oil filter which is provided at the oil tank cover and filters the lubricant sent from the pump, wherein the first passage is provided to be divided from the passage between the pump and the oil filter.
- the lubricant flowing through the control valve returns to the oil tank without passing through the oil filter. For this reason, there are advantages in that the amount of lubricant filtered at the oil filter may be suppressed and the durability of the oil filter may be extended.
- the installation portion is formed in a planar shape. According to the aspect of the present invention, there is an advantage in that the liquid tightness between the installation portion of the oil tank cover and the control valve may be easily ensured.
- a turbo refrigerator including: a condenser which cools and liquefies a compressed refrigerant; an evaporator which evaporates the liquefied refrigerant and takes evaporation heat from a cooling object to cool the cooling object; and a compressor which compresses the refrigerant evaporated from the evaporator and supplies the compressed refrigerant to the condenser, wherein the turbo compressor according to the aspect may be used as the compressor.
- control valve since the control valve is installed at the installation portion, at least one of the first passage and the second passage is directly connected to the control valve. Accordingly, in the turbo compressor and the turbo refrigerator, there is an advantage in that the number of components, such as pipes, connected to the control valve may be decreased.
- FIG. 1 is a block diagram illustrating a schematic configuration of a turbo refrigerator of an embodiment of the present invention.
- FIG. 2 is a horizontal cross-sectional view illustrating the turbo compressor of the embodiment of the present invention.
- FIG. 3A is a schematic diagram illustrating a lubricant supply unit of the embodiment of the present invention.
- FIG. 3B is a schematic diagram illustrating a lubricant supply unit of the embodiment of the present invention.
- FIG. 3C is a schematic diagram illustrating a lubricant supply unit of the embodiment of the present invention.
- FIGS. 1 to 3C the scales of the members are appropriately changed so that the members have recognizable sizes.
- FIG. 1 is a block diagram illustrating a schematic configuration of a turbo refrigerator S 1 of the embodiment.
- the turbo refrigerator S 1 of the embodiment is installed at, for example, a building, a factory, or the like in order to generate air-conditioning cooling water, and includes a condenser 1 , an economizer 2 , an evaporator 3 , and a turbo compressor 4 .
- a compressed refrigerant gas X 1 as a compressed gas refrigerant is supplied to the condenser 1 , and the compressed refrigerant gas X 1 is cooled and liquefied therein so that it becomes a refrigerant liquid X 2 .
- the condenser 1 is connected to the turbo compressor 4 through a passage R 1 where the compressed refrigerant gas X 1 flows, and is connected to the economizer 2 through a passage R 2 where the refrigerant liquid X 2 flows.
- An expansion valve 5 is installed in the passage R 2 so as to depressurize the refrigerant liquid X 2 .
- the economizer 2 temporarily stores the refrigerant liquid X 2 depressurized at the expansion valve 5 .
- the economizer 2 is connected to the evaporator 3 through a passage R 3 where the refrigerant liquid X 2 flows, and is connected to the turbo compressor 4 through a passage R 4 where a gas phase component X 3 of the refrigerant generated at the economizer 2 flows.
- An expansion valve 6 is installed at the passage R 3 so as to further depressurize the refrigerant liquid X 2 .
- the passage 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 described later and provided in the turbo compressor 4 .
- the evaporator 3 cools a cooling object by taking evaporation heat from the cooling object such as water in a manner such that the refrigerant liquid X 2 evaporates.
- the evaporator 3 is connected to the turbo compressor 4 through a passage R 5 where a refrigerant gas X 4 generated by the evaporation of the refrigerant liquid X 2 flows.
- the passage R 5 is connected to a first compression stage 21 described later and provided in the turbo compressor 4 .
- the turbo compressor 4 compresses the refrigerant gas X 4 so that it becomes the compressed refrigerant gas X 1 .
- the turbo compressor 4 is connected to the condenser 1 through the passage R 1 where the compressed refrigerant gas X 1 flows, and is connected to the evaporator 3 through the passage R 5 where the refrigerant gas X 4 flows.
- the compressed refrigerant gas X 1 supplied to the condenser 1 through the passage R 1 is cooled and liquefied by the condenser 1 so that it becomes the refrigerant liquid X 2 .
- the refrigerant liquid X 2 is depressurized by the expansion valve 5 when it is supplied to the economizer 2 through the passage R 2 , is temporarily stored in a depressurized state at the economizer 2 . Then, the refrigerant liquid X 2 is further depressurized by the expansion valve 6 when it is supplied to the evaporator 3 through the passage R 3 . Accordingly, the depressurized refrigerant liquid X 2 is supplied to the evaporator 3 .
- the refrigerant liquid X 2 supplied to the evaporator 3 is evaporated by the evaporator 3 so that it becomes the refrigerant gas X 4 , and is supplied to the turbo compressor 4 through the passage R 5 .
- the refrigerant gas X 4 supplied to the turbo compressor 4 is compressed by the turbo compressor 4 so that it becomes the compressed refrigerant gas X 1 , and is supplied again to the condenser 1 through the passage 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 passage R 4 , and is compressed together with the refrigerant gas X 4 so that it is supplied as the compressed refrigerant gas X 1 to the condenser 1 through the passage R 1 .
- the cooling object is cooled or frozen in a manner such that the refrigerant liquid X 2 takes evaporation heat from the cooling object when evaporating from the evaporator 3 .
- FIG. 2 is a horizontal cross-sectional view illustrating the turbo compressor 4 of the embodiment.
- the turbo compressor 4 of the embodiment includes a motor unit 10 , a compressor unit 20 , and a gear unit 30 .
- the motor unit 10 includes a motor 12 which includes an output shaft 11 and serves as a drive source which drives the compressor unit 20 , and a motor casing 13 which surrounds the motor 12 and in which the motor 12 is installed.
- the drive source driving the compressor unit 20 is not limited to the motor 12 .
- an internal combustion engine may be used.
- the output shaft 11 of the motor 12 is rotatably supported by a first bearing 14 and a second bearing 15 fixed to the motor casing 13 .
- the compressor unit 20 includes the first compression stage 21 which suctions and compresses the refrigerant gas X 4 (refer to FIG. 1 ), and the second compression stage 22 which further compresses the refrigerant gas X 4 compressed at the first compression stage 21 and discharges it as the compressed refrigerant gas X 1 (refer to FIG. 1 ).
- the first compression stage 21 includes a first impeller 21 a which discharges the refrigerant gas X 4 in the radial direction by applying kinetic energy to the refrigerant gas X 4 supplied in the thrust direction, a first diffuser 21 b which compresses the refrigerant gas X 4 by converting the kinetic energy applied to the refrigerant gas X 4 into potential energy by the first impeller 21 a , a first scroll chamber 21 c (a scroll chamber) which guides the refrigerant gas X 4 compressed by the first diffuser 21 b to the outside of the first compression stage 21 , and a suction port 21 d which supplies the refrigerant gas X 4 to the first impeller 21 a by suctioning the refrigerant gas X 4 .
- the first diffuser 21 b , the first scroll chamber 21 c , and the suction port 21 d are formed by a first impeller casing 21 e surrounding the first impeller 21 a.
- the rotation shaft 23 is provided inside the compressor unit 20 so as to extend across the first compression stage 21 and the second compression stage 22 .
- the first impeller 21 a is fixed to the rotation shaft 23 , and the rotation shaft 23 rotates when rotation power is transmitted from the motor 12 thereto.
- inlet guide vanes 21 f are provided in the suction port 21 d of the first compression stage 21 so as to adjust the suction amount of the first compression stage 21 .
- Each inlet guide vane 21 f is rotatably supported by the drive mechanism 21 g fixed to the first impeller casing 21 e so that the apparent area in the stream direction of the refrigerant gas X 4 is changeable.
- a vane drive unit 24 is installed at the outside of the first impeller casing 21 e so that the vane drive unit is connected to the drive mechanism 21 g and rotationally drives each inlet guide vane 21 f.
- the second compression stage 22 includes a second impeller 22 a which discharges the refrigerant gas X 4 by applying kinetic energy to the refrigerant gas X 4 compressed at the first compression stage 21 and supplied in the thrust direction, a second diffuser 22 b which compresses and discharges the compressed refrigerant gas X 1 by converting the kinetic energy applied to the refrigerant gas X 4 into potential energy using the second impeller 22 a , a second scroll chamber 22 c which guides 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 guides the refrigerant gas X 4 compressed by the first compression stage 21 to the second impeller 22 a .
- 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 surrounding the second impeller 22 a.
- the second impeller 22 a is fixed to the rotation shaft 23 so that the rear surface thereof is coupled to the rear surface of the first impeller 21 a , and rotates when rotation power is transmitted from the motor 12 to the rotation shaft 23 .
- the second scroll chamber 22 c is connected to the passage R 1 (refer to FIG. 1 ) supplying the compressed refrigerant gas X 1 to the condenser 1 (refer to FIG. 1 ), and supplies the compressed refrigerant gas X 1 guided out from the second compression stage 22 to the passage R 1 .
- the 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 pipe (not shown) that is provided separately from the first compression stage 21 and the second compression stage 22 .
- the refrigerant gas X 4 compressed at the first compression stage 21 is supplied to the second compression stage 22 through the external pipe.
- the passage R 4 (refer to FIG. 1 ) is connected to the external pipe, and the gas phase component X 3 of the refrigerant generated at the economizer 2 is configured to be supplied to the second compression stage 22 through the external pipe.
- the rotation shaft 23 is rotatably supported by a third bearing 26 fixed to the second impeller casing 22 e at a space 25 between the first compression stage 21 and the second compression stage 22 and a fourth bearing 27 fixed to the gear unit 30 of the second impeller casing 22 e.
- the gear unit 30 is used to transmit rotation power of the motor 12 to the rotation 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 rotation shaft 23 and meshes with the spur gear 31 , and a gear casing 33 which accommodates the spur gear 31 and the pinion gear 32 .
- the gear unit 30 includes an oil tank 34 which is provided in the gear casing 33 and storing lubricant therein, a nozzle 35 which spraying and supplying lubricant to a sliding position sliding with the operation of the motor 12 , a supply pipe 36 which is connected to the nozzle 35 , and a lubricant supply unit 40 (hereinafter, simply referred to as a “supply unit 40 ”) which sends lubricant stored in the oil tank 34 toward the supply pipe 36 and the nozzle 35 .
- a bearing such as a fourth bearing 27 or a meshing portion between the spur gear 31 and the pinion gear 32 may be mentioned.
- the spur gear 31 has an outer diameter larger than that of the pinion gear 32 , and transmits the rotation power of the motor 12 to the rotation shaft 23 so that the rpm of the rotation shaft 23 increases with respect to the rpm of the output shaft 11 by the corporation between the spur gear 31 and the pinion gear 32 .
- the transmission method is not limited thereto, and the diameters of the plurality of gears may be set so that the rpm (number of rotations) of the rotation shaft 23 is equal to or lower than the rpm of the output shaft 11 .
- the gear casing 33 is molded separately from the motor casing 13 and the second impeller casing 22 e , and connects them each other.
- the interior of the gear casing 33 is provided with an accommodation space 33 a that accommodates the spur gear 31 , the pinion gear 32 , the nozzle 35 , and the supply pipe 36 .
- the oil tank 34 is a tank that is used to collect and store lubricant supplied to the sliding position with the operation of the motor 12 and lubricating the sliding position.
- the lubricant stored in the oil tank 34 may contain minute metal powder or sludge formed at the sliding position.
- the nozzle 35 sprays and supplies lubricant to the sliding position of the fourth bearing 27 or the meshing portion between the spur gear 31 and the pinion gear 32 to lubricate the sliding position.
- the supply pipe 36 is a pipe member that is provided between the nozzle 35 and the supply unit 40 and supplying lubricant to the nozzle 35 .
- Another nozzle may be provided to supply lubricant to the sliding position of the first bearing 14 or the third bearing 26 .
- FIGS. 3A to 3C are schematic diagrams the supply unit 40 of the embodiment, where FIG. 3A is a front view, FIG. 3B is a plan view, and FIG. 3C is a side view.
- the supply unit 40 includes a pump 41 , an oil filter 42 , a first blocking valve 43 , a second blocking valve 44 , and a control valve 45 .
- the pump 41 , the oil filter 42 , the first blocking valve 43 , the second blocking valve 44 , and the control valve 45 are all installed at an oil tank cover 46 .
- the oil tank cover 46 is provided to seal an open portion 34 a formed in the oil tank 34 .
- the oil tank cover 46 is molded by, for example, casting, and is fixed to the oil tank 34 through fastening bolts 46 a .
- the second supply pipe 47 is connected to the supply unit 40 .
- the second supply pipe 47 is a pipe member that is connected to the supply pipe 36 (refer to FIG. 2 ).
- the pump 41 is installed at the rear surface of the oil tank cover 46 , and is provided inside the oil tank 34 .
- the pump 41 sends lubricant stored in the oil tank 34 toward the first pre-filtering passage 46 b formed in the oil tank cover 46 .
- the discharge amount from the pump 41 is set to be constant.
- the oil filter 42 is installed in a filter installation space 46 c formed at the front surface of the oil tank cover 46 so as to be replaceable when necessary.
- the oil filter 42 filters the lubricant sent from the pump 41 and removes minute metal powder or sludge contained in the lubricant.
- the first blocking valve 43 is provided at the front surface of the oil tank cover 46 .
- the first blocking valve 43 is connected to the pump 41 through the first pre-filtering passage 46 b .
- the first blocking valve 43 is connected to the filter installation space 46 c through the second pre-filtering passage 46 d formed in the oil tank cover 46 .
- the first blocking valve 43 is a valve that blocks the stream of the lubricant flowing toward the oil filter 42 by interrupting the connection between the first pre-filtering passage 46 b and the second pre-filtering passage 46 d .
- the first blocking valve 43 is opened or closed by an operation of a first handle 43 a.
- the second blocking valve 44 is provided between the filter installation space 46 c and the second supply pipe 47 at the front surface side of the oil tank cover 46 .
- the second blocking valve 44 is a valve that blocks the stream of the lubricant flowing toward the supply pipe 36 by interrupting the connection between the filter installation space 46 c and the second supply pipe 47 .
- the second blocking valve 44 is opened or closed by an operation of a second handle 44 a.
- the control valve 45 is a valve that adjusts the flow rate of the lubricant returning to the oil tank 34 by dividing the stream of the lubricant sent from the pump 41 .
- the control valve 45 is installed at an installation portion 46 e formed in the oil tank cover 46 .
- the surface of the control valve 45 facing the installation portion 46 e is formed in a planar shape. This surface is provided with an inflow hole and an outflow hole (not shown).
- the flow rate of the lubricant flowing from the inflow hole into the control valve 45 and flowing out from the outflow hole is adjustable.
- the flow rate of the lubricant is adjusted by an operation of a third handle 45 a.
- the installation portion 46 e is formed in a planar shape.
- a gasket (a seal member, not shown in figure) is interposed between the control valve 45 and the installation portion 46 e so as to liquid-tightly seal therebetween.
- the gasket is provided with penetration holes which correspond to the inflow hole and the outflow hole of the control valve 45 .
- the surface of the control valve 45 facing the installation portion 46 e and the installation portion 46 e are both formed in a planar shape. Accordingly, the liquid-tightness therebetween may be ensured.
- the oil tank cover 46 is provided with a dividing passage 46 f (a first passage) and a returning passage 46 g (a second passage).
- the dividing passage 46 f is divided from the filter installation space 46 c and is opened from the installation portion 46 e . That is, the dividing passage 46 f is provided to be divided from the passage between the pump 41 and the oil filter 42 .
- the open position of the dividing passage 46 f in the installation portion 46 e is set to a position facing the inflow hole of the control valve 45 . As described above, since the gasket is interposed between the control valve 45 and the installation portion 46 e , the dividing passage 46 f is liquid-tightly connected to the inflow hole of the control valve 45 .
- the dividing passage 46 f is directly connected to the filter installation space 46 c and the control valve 45 .
- the dividing passage 46 f is formed by extension hole portions which extend in a predetermined direction, and the predetermined end portion of the extension hole is sealed by a set screw 46 h (a slotted set screw) threaded thereinto.
- the returning passage 46 g is provided between the installation portion 46 e and the rear surface of the oil tank cover 46 .
- One end of the returning passage 46 g is opened from the installation portion 46 e , and the other end thereof is opened from the rear surface of the oil tank cover 46 (that is, the interior of the oil tank 34 ).
- the open position of the returning passage 46 g in the installation portion 46 e is set to a position facing the outflow hole of the control valve 45 .
- the gasket is interposed between the control valve 45 and the installation portion 46 e , the returning passage 46 g is liquid-tightly connected to the outflow hole of the control valve 45 . That is, the returning passage 46 g is directly connected to the interior of the oil tank 34 by the control valve 45 .
- the first blocking valve 43 and the second blocking valve 44 are opened by the operation of the first handle 43 a and the second handle 44 a .
- the pump 41 the lubricant stored in the oil tank 34 is sent toward the first pre-filtering passage 46 b .
- the lubricant sent to the first pre-filtering passage 46 b flows into the filter installation space 46 c through the first blocking valve 43 and the second pre-filtering passage 46 d .
- the lubricant is filtered while flowing into the oil filter 42 provided in the filter installation space 46 c . By this filtering, minute metal powder or sludge contained in the lubricant is removed.
- the lubricant filtered by the oil filter 42 is sent to the second supply pipe 47 through the second blocking valve 44 .
- the lubricant sent to the second supply pipe 47 is supplied to the nozzle 35 through the supply pipe 36 , and is sprayed from the nozzle 35 to the sliding position.
- the dividing passage 46 f and the returning passage 46 g are opened from the installation portion 46 e , when the control valve 45 is provided in the installation portion 46 e , the dividing passage 46 f and the returning passage 46 g are both directly connected to the control valve 45 . Accordingly, it is possible to decrease the number of components such as pipes connecting the control valve 45 to the pump 41 and the oil tank 34 . When the number of components is decreased, it is possible to simplify the assembly of the supply unit 40 and to suppress oil leakage.
- the lubricant returning into the oil tank 34 through the control valve 45 is the lubricant divided before passing through the oil filter 42 . For this reason, it is possible to suppress the amount of the lubricant filtered at the oil filter 42 and to extend the durability of the oil filter 42 .
- rotation power of the motor 12 is transmitted to the rotation shaft 23 through the spur gear 31 and the pinion gear 32 . Accordingly, the first impeller 21 a and the second impeller 22 a of the compressor unit 20 are rotationally driven.
- the suction port 21 d of the first compression stage 21 becomes a negative pressure state, and the refrigerant gas X 4 flows from the passage R 5 into the first compression stage 21 through the suction port 21 d .
- the refrigerant gas X 4 flowing into the first compression stage 21 flows into the first impeller 21 a in the thrust direction, and is discharged in the radial direction while kinetic energy is applied thereto by the first impeller 21 a .
- the refrigerant gas X 4 discharged from the first impeller 21 a is compressed by the first diffuser 21 b by converting kinetic energy into potential energy.
- the refrigerant gas X 4 discharged from the first diffuser 21 b is guided to the outside of the first compression stage 21 through the first scroll chamber 21 c .
- the refrigerant gas X 4 guided to the outside of the first compression stage 21 is supplied to the second compression stage 22 through an external pipe (not shown).
- the refrigerant gas X 4 supplied to the second compression stage 22 flows into the second impeller 22 a in the thrust direction through the introduction scroll chamber 22 d , and is discharged in the radial direction while kinetic energy is applied thereto by the second impeller 22 a .
- the refrigerant gas X 4 discharged from the second impeller 22 a is further compressed by converting kinetic energy into potential energy by the second diffuser 22 b , so that it becomes the compressed refrigerant gas X 1 .
- the compressed refrigerant gas X 1 discharged from the second diffuser 22 b is guided the outside of the second compression stage 22 through the second scroll chamber 22 c .
- the compressed refrigerant gas X 1 guided to the outside of the second compression stage 22 is supplied to the condenser 1 through the passage R 1 .
- the embodiment there is an advantage in that the number of supply pipes or nozzles supplying the lubricant to the fourth bearing 27 and the meshing portion 38 may be decreased. Further, in the turbo compressor 4 and the turbo refrigerator S 1 including the turbo compressor, there is an advantage in that manufacturing effort and cost may be reduced.
- the dividing passage 46 f and the returning passage 46 g are both opened from the installation portion 46 e , but the present invention is not limited thereto. For example, any one of them may be opened from the installation portion 46 e . Only by a configuration in which one passage is opened from the installation portion 46 e , the number of components such as pipes may be decreased.
- the dividing passage 46 f is divided from the filter installation space 46 c , but the present invention is not limited thereto.
- the dividing passage may be divided from the passage through which the lubricant filtered at the oil filter 42 flows.
- the installation portion 46 e is formed in a planar shape, but only the gap between the installation portion 46 e and the control valve 45 may be liquid-tightly sealed.
- a step portion may be provided between the dividing passage 46 f and the returning passage 46 g in the installation portion 46 e.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
A turbo compressor is provided including: a pump which sends lubricant stored in an oil tank having an open portion; and a control valve which adjusts the flow rate of the lubricant returning to the oil tank by dividing the stream of the lubricant sent from the pump; and an oil tank cover which blocks the open portion and is provided with an installation portion for the control valve, wherein the oil tank cover includes at least one of a first passage opened from the installation portion and allowing the stream of the lubricant sent from the pump to be divided and flow toward the control valve and a second passage opened from the installation portion and allowing the lubricant to flow from the control valve toward the oil tank.
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. 2010-081123, filed Mar. 31, 2010, the content of which is incorporated herein by reference.
- 2. Description of Related Art
- Hitherto, as a refrigerator cooling or freezing a cooling object such as water, a turbo refrigerator has been known including a turbo compressor compressing a refrigerant through the rotation of an impeller and discharging the compressed refrigerant. The turbo compressor included in the turbo refrigerator includes sliding positions for bearings or gears sliding on the corresponding members with an operation of a drive unit such as a motor. Accordingly, for example, as disclosed in Patent Document 1 (Japanese Patent Application First Publication, No. 2009-257684), the turbo compressor includes a lubricant supply structure which supplies a lubricant for lubricating the sliding positions. The lubricant supply structure includes an oil tank which stores the lubricant and a pump sending the lubricant toward the sliding positions.
- The lubricant supply structure may include a control valve that adjusts the flow rate of the lubricant supplied to the sliding positions. For example, the control valve is installed in a passage dividing the stream of the lubricant sent from the pump and returning to the oil tank.
- However, since a plurality of pipes are provided between the pump and the control valve and between the control valve and the oil tank to connect them to each other, a problem arises in that the number of components, such as pipes, increases. Since the number of components increases, it becomes complicated to assemble the lubricant supply structure. Further, oil leaks are apt to occur at the connection positions of the pipes.
- The present invention has been made in view of such circumstances, and an object thereof is to provide a turbo compressor capable of decreasing the number of components connected to a control valve, and a turbo refrigerator including the turbo compressor.
- In order to solve the above-described problems, the present invention adopts the following configurations.
- A turbo compressor according to the present invention is provided including: a pump which sends lubricant stored in an oil tank having an open portion; a control valve which adjusts the flow rate of the lubricant returning to the oil tank by dividing the stream of the lubricant sent from the pump; and an oil tank cover which blocks the open portion and is provided with an installation portion for the control valve, wherein the oil tank cover includes at least one of a first passage opened from the installation portion and allowing the stream of the lubricant sent from the pump to be divided and flow toward the control valve and a second passage opened from the installation portion and allowing the lubricant to flow from the control valve toward the oil tank.
- According to the present invention, since at least one of the first passage and the second passage is opened from the installation portion, when the control valve is installed at the installation portion, at least one of the first passage and the second passage is directly connected to the control valve.
- Further, the turbo compressor according to the present invention further includes an oil filter which is provided at the oil tank cover and filters the lubricant sent from the pump, wherein the first passage is provided to be divided from the passage between the pump and the oil filter.
- According to the present invention, the lubricant flowing through the control valve returns to the oil tank without passing through the oil filter. For this reason, there are advantages in that the amount of lubricant filtered at the oil filter may be suppressed and the durability of the oil filter may be extended.
- Further, in the turbo compressor according to the present invention, the installation portion is formed in a planar shape. According to the aspect of the present invention, there is an advantage in that the liquid tightness between the installation portion of the oil tank cover and the control valve may be easily ensured.
- Further, a turbo refrigerator according to the present invention is provided including: a condenser which cools and liquefies a compressed refrigerant; an evaporator which evaporates the liquefied refrigerant and takes evaporation heat from a cooling object to cool the cooling object; and a compressor which compresses the refrigerant evaporated from the evaporator and supplies the compressed refrigerant to the condenser, wherein the turbo compressor according to the aspect may be used as the compressor.
- According to the present invention, the following advantage may be obtained.
- According to the present invention, since the control valve is installed at the installation portion, at least one of the first passage and the second passage is directly connected to the control valve. Accordingly, in the turbo compressor and the turbo refrigerator, there is an advantage in that the number of components, such as pipes, connected to the control valve may be decreased.
-
FIG. 1 is a block diagram illustrating a schematic configuration of a turbo refrigerator of an embodiment of the present invention. -
FIG. 2 is a horizontal cross-sectional view illustrating the turbo compressor of the embodiment of the present invention. -
FIG. 3A is a schematic diagram illustrating a lubricant supply unit of the embodiment of the present invention. -
FIG. 3B is a schematic diagram illustrating a lubricant supply unit of the embodiment of the present invention. -
FIG. 3C is a schematic diagram illustrating a lubricant supply unit of the embodiment of the present invention. - Hereinafter, an example embodiment of the present invention will be described by referring to
FIGS. 1 to 3C . In the corresponding drawings used for the following description, the scales of the members are appropriately changed so that the members have recognizable sizes. -
FIG. 1 is a block diagram illustrating a schematic configuration of a turbo refrigerator S1 of the embodiment. The turbo refrigerator S1 of the embodiment is installed at, for example, a building, a factory, or the like in order to generate air-conditioning cooling water, and includes acondenser 1, aneconomizer 2, anevaporator 3, and aturbo compressor 4. - A compressed refrigerant gas X1 as a compressed gas refrigerant is supplied to the
condenser 1, and the compressed refrigerant gas X1 is cooled and liquefied therein so that it becomes a refrigerant liquid X2. Further, as shown inFIG. 1 , thecondenser 1 is connected to theturbo compressor 4 through a passage R1 where the compressed refrigerant gas X1 flows, and is connected to theeconomizer 2 through a passage R2 where the refrigerant liquid X2 flows. An expansion valve 5 is installed in the passage R2 so as to depressurize the refrigerant liquid X2. - The
economizer 2 temporarily stores the refrigerant liquid X2 depressurized at the expansion valve 5. Theeconomizer 2 is connected to theevaporator 3 through a passage R3 where the refrigerant liquid X2 flows, and is connected to theturbo compressor 4 through a passage R4 where a gas phase component X3 of the refrigerant generated at theeconomizer 2 flows. Anexpansion valve 6 is installed at the passage R3 so as to further depressurize the refrigerant liquid X2. Further, the passage R4 is connected to theturbo compressor 4 so as to supply the gas phase component X3 to asecond compression stage 22 described later and provided in theturbo compressor 4. - The
evaporator 3 cools a cooling object by taking evaporation heat from the cooling object such as water in a manner such that the refrigerant liquid X2 evaporates. Theevaporator 3 is connected to theturbo compressor 4 through a passage R5 where a refrigerant gas X4 generated by the evaporation of the refrigerant liquid X2 flows. The passage R5 is connected to afirst compression stage 21 described later and provided in theturbo compressor 4. - The
turbo compressor 4 compresses the refrigerant gas X4 so that it becomes the compressed refrigerant gas X1. As described above, theturbo compressor 4 is connected to thecondenser 1 through the passage R1 where the compressed refrigerant gas X1 flows, and is connected to theevaporator 3 through the passage R5 where the refrigerant gas X4 flows. - In the turbo refrigerator S1, the compressed refrigerant gas X1 supplied to the
condenser 1 through the passage R1 is cooled and liquefied by thecondenser 1 so that it becomes the refrigerant liquid X2. The refrigerant liquid X2 is depressurized by the expansion valve 5 when it is supplied to theeconomizer 2 through the passage R2, is temporarily stored in a depressurized state at theeconomizer 2. Then, the refrigerant liquid X2 is further depressurized by theexpansion valve 6 when it is supplied to theevaporator 3 through the passage R3. Accordingly, the depressurized refrigerant liquid X2 is supplied to theevaporator 3. The refrigerant liquid X2 supplied to theevaporator 3 is evaporated by theevaporator 3 so that it becomes the refrigerant gas X4, and is supplied to theturbo compressor 4 through the passage R5. The refrigerant gas X4 supplied to theturbo compressor 4 is compressed by theturbo compressor 4 so that it becomes the compressed refrigerant gas X1, and is supplied again to thecondenser 1 through the passage R1. - 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 passage R4, and is compressed together with the refrigerant gas X4 so that it is supplied as the compressed refrigerant gas X1 to thecondenser 1 through the passage R1. - In the turbo refrigerator S1, the cooling object is cooled or frozen in a manner such that the refrigerant liquid X2 takes evaporation heat from the cooling object when evaporating from the
evaporator 3. - Next, the
turbo compressor 4 of the embodiment will be described in more detail.FIG. 2 is a horizontal cross-sectional view illustrating theturbo compressor 4 of the embodiment. - As shown in
FIG. 2 , theturbo compressor 4 of the embodiment includes amotor unit 10, acompressor unit 20, and agear unit 30. - The
motor unit 10 includes amotor 12 which includes anoutput shaft 11 and serves as a drive source which drives thecompressor unit 20, and amotor casing 13 which surrounds themotor 12 and in which themotor 12 is installed. The drive source driving thecompressor unit 20 is not limited to themotor 12. For example, an internal combustion engine may be used. Theoutput shaft 11 of themotor 12 is rotatably supported by afirst bearing 14 and asecond bearing 15 fixed to themotor casing 13. - The
compressor unit 20 includes thefirst compression stage 21 which suctions and compresses the refrigerant gas X4 (refer toFIG. 1 ), and thesecond compression stage 22 which further compresses the refrigerant gas X4 compressed at thefirst compression stage 21 and discharges it as the compressed refrigerant gas X1 (refer toFIG. 1 ). - The
first compression stage 21 includes afirst impeller 21 a which discharges the refrigerant gas X4 in the radial direction by applying kinetic energy to the refrigerant gas X4 supplied in the thrust direction, afirst diffuser 21 b which compresses the refrigerant gas X4 by converting the kinetic energy applied to the refrigerant gas X4 into potential energy by thefirst impeller 21 a, afirst scroll chamber 21 c (a scroll chamber) which guides the refrigerant gas X4 compressed by thefirst diffuser 21 b to the outside of thefirst compression stage 21, and asuction port 21 d which supplies the refrigerant gas X4 to thefirst impeller 21 a by suctioning the refrigerant gas X4. Thefirst diffuser 21 b, thefirst scroll chamber 21 c, and thesuction port 21 d are formed by afirst impeller casing 21 e surrounding thefirst impeller 21 a. - The
rotation shaft 23 is provided inside thecompressor unit 20 so as to extend across thefirst compression stage 21 and thesecond compression stage 22. Thefirst impeller 21 a is fixed to therotation shaft 23, and therotation shaft 23 rotates when rotation power is transmitted from themotor 12 thereto. Further,inlet guide vanes 21 f are provided in thesuction port 21 d of thefirst compression stage 21 so as to adjust the suction amount of thefirst compression stage 21. Eachinlet guide vane 21 f is rotatably supported by thedrive mechanism 21 g fixed to thefirst impeller casing 21 e so that the apparent area in the stream direction of the refrigerant gas X4 is changeable. Further, avane drive unit 24 is installed at the outside of thefirst impeller casing 21 e so that the vane drive unit is connected to thedrive mechanism 21 g and rotationally drives eachinlet guide vane 21 f. - The
second compression stage 22 includes asecond impeller 22 a which discharges the refrigerant gas X4 by applying kinetic energy to the refrigerant gas X4 compressed at thefirst compression stage 21 and supplied in the thrust direction, asecond diffuser 22 b which compresses and discharges the compressed refrigerant gas X1 by converting the kinetic energy applied to the refrigerant gas X4 into potential energy using thesecond impeller 22 a, asecond scroll chamber 22 c which guides 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 guides the refrigerant gas X4 compressed by thefirst compression stage 21 to thesecond impeller 22 a. Thesecond diffuser 22 b, thesecond scroll chamber 22 c, and theintroduction scroll chamber 22 d are formed by a second impeller casing 22 e surrounding thesecond impeller 22 a. - The
second impeller 22 a is fixed to therotation shaft 23 so that the rear surface thereof is coupled to the rear surface of thefirst impeller 21 a, and rotates when rotation power is transmitted from themotor 12 to therotation shaft 23. Thesecond scroll chamber 22 c is connected to the passage R1 (refer toFIG. 1 ) supplying the compressed refrigerant gas X1 to the condenser 1 (refer toFIG. 1 ), and supplies the compressed refrigerant gas X1 guided out from thesecond compression stage 22 to the passage R1. - 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 pipe (not shown) that is provided separately from thefirst compression stage 21 and thesecond compression stage 22. The refrigerant gas X4 compressed at thefirst compression stage 21 is supplied to thesecond compression stage 22 through the external pipe. The passage R4 (refer toFIG. 1 ) is connected to the external pipe, and the gas phase component X3 of the refrigerant generated at theeconomizer 2 is configured to be supplied to thesecond compression stage 22 through the external pipe. - The
rotation shaft 23 is rotatably supported by athird bearing 26 fixed to the second impeller casing 22 e at aspace 25 between thefirst compression stage 21 and thesecond compression stage 22 and afourth bearing 27 fixed to thegear unit 30 of the second impeller casing 22 e. - The
gear unit 30 is used to transmit rotation power of themotor 12 to therotation shaft 23, and includes aspur gear 31 which is fixed to theoutput shaft 11, apinion gear 32 which is fixed to therotation shaft 23 and meshes with thespur gear 31, and agear casing 33 which accommodates thespur gear 31 and thepinion gear 32. Furthermore, thegear unit 30 includes anoil tank 34 which is provided in thegear casing 33 and storing lubricant therein, anozzle 35 which spraying and supplying lubricant to a sliding position sliding with the operation of themotor 12, asupply pipe 36 which is connected to thenozzle 35, and a lubricant supply unit 40 (hereinafter, simply referred to as a “supply unit 40”) which sends lubricant stored in theoil tank 34 toward thesupply pipe 36 and thenozzle 35. As the above-described sliding positions, a bearing such as afourth bearing 27 or a meshing portion between thespur gear 31 and thepinion gear 32 may be mentioned. - The
spur gear 31 has an outer diameter larger than that of thepinion gear 32, and transmits the rotation power of themotor 12 to therotation shaft 23 so that the rpm of therotation shaft 23 increases with respect to the rpm of theoutput shaft 11 by the corporation between thespur gear 31 and thepinion gear 32. The transmission method is not limited thereto, and the diameters of the plurality of gears may be set so that the rpm (number of rotations) of therotation shaft 23 is equal to or lower than the rpm of theoutput shaft 11. - The
gear casing 33 is molded separately from themotor casing 13 and the second impeller casing 22 e, and connects them each other. The interior of thegear casing 33 is provided with anaccommodation space 33 a that accommodates thespur gear 31, thepinion gear 32, thenozzle 35, and thesupply pipe 36. - The
oil tank 34 is a tank that is used to collect and store lubricant supplied to the sliding position with the operation of themotor 12 and lubricating the sliding position. The lubricant stored in theoil tank 34 may contain minute metal powder or sludge formed at the sliding position. - The
nozzle 35 sprays and supplies lubricant to the sliding position of thefourth bearing 27 or the meshing portion between thespur gear 31 and thepinion gear 32 to lubricate the sliding position. Thesupply pipe 36 is a pipe member that is provided between thenozzle 35 and thesupply unit 40 and supplying lubricant to thenozzle 35. Another nozzle may be provided to supply lubricant to the sliding position of thefirst bearing 14 or thethird bearing 26. - Next, the
supply unit 40 which is the characteristic point of the embodiment will be described in more detail.FIGS. 3A to 3C are schematic diagrams thesupply unit 40 of the embodiment, whereFIG. 3A is a front view,FIG. 3B is a plan view, andFIG. 3C is a side view. Thesupply unit 40 includes apump 41, anoil filter 42, afirst blocking valve 43, asecond blocking valve 44, and acontrol valve 45. Thepump 41, theoil filter 42, thefirst blocking valve 43, thesecond blocking valve 44, and thecontrol valve 45 are all installed at anoil tank cover 46. Theoil tank cover 46 is provided to seal anopen portion 34 a formed in theoil tank 34. Theoil tank cover 46 is molded by, for example, casting, and is fixed to theoil tank 34 throughfastening bolts 46 a. Thesecond supply pipe 47 is connected to thesupply unit 40. Thesecond supply pipe 47 is a pipe member that is connected to the supply pipe 36 (refer toFIG. 2 ). - The
pump 41 is installed at the rear surface of theoil tank cover 46, and is provided inside theoil tank 34. Thepump 41 sends lubricant stored in theoil tank 34 toward thefirst pre-filtering passage 46 b formed in theoil tank cover 46. The discharge amount from thepump 41 is set to be constant. Theoil filter 42 is installed in afilter installation space 46 c formed at the front surface of theoil tank cover 46 so as to be replaceable when necessary. Theoil filter 42 filters the lubricant sent from thepump 41 and removes minute metal powder or sludge contained in the lubricant. - The
first blocking valve 43 is provided at the front surface of theoil tank cover 46. Thefirst blocking valve 43 is connected to thepump 41 through thefirst pre-filtering passage 46 b. Further, thefirst blocking valve 43 is connected to thefilter installation space 46 c through thesecond pre-filtering passage 46 d formed in theoil tank cover 46. Further, thefirst blocking valve 43 is a valve that blocks the stream of the lubricant flowing toward theoil filter 42 by interrupting the connection between thefirst pre-filtering passage 46 b and thesecond pre-filtering passage 46 d. Thefirst blocking valve 43 is opened or closed by an operation of afirst handle 43 a. - The
second blocking valve 44 is provided between thefilter installation space 46 c and thesecond supply pipe 47 at the front surface side of theoil tank cover 46. Thesecond blocking valve 44 is a valve that blocks the stream of the lubricant flowing toward thesupply pipe 36 by interrupting the connection between thefilter installation space 46 c and thesecond supply pipe 47. Thesecond blocking valve 44 is opened or closed by an operation of asecond handle 44 a. - The
control valve 45 is a valve that adjusts the flow rate of the lubricant returning to theoil tank 34 by dividing the stream of the lubricant sent from thepump 41. Thecontrol valve 45 is installed at aninstallation portion 46 e formed in theoil tank cover 46. The surface of thecontrol valve 45 facing theinstallation portion 46 e is formed in a planar shape. This surface is provided with an inflow hole and an outflow hole (not shown). The flow rate of the lubricant flowing from the inflow hole into thecontrol valve 45 and flowing out from the outflow hole is adjustable. The flow rate of the lubricant is adjusted by an operation of athird handle 45 a. - The
installation portion 46 e is formed in a planar shape. A gasket (a seal member, not shown in figure) is interposed between thecontrol valve 45 and theinstallation portion 46 e so as to liquid-tightly seal therebetween. The gasket is provided with penetration holes which correspond to the inflow hole and the outflow hole of thecontrol valve 45. The surface of thecontrol valve 45 facing theinstallation portion 46 e and theinstallation portion 46 e are both formed in a planar shape. Accordingly, the liquid-tightness therebetween may be ensured. - The
oil tank cover 46 is provided with a dividingpassage 46 f (a first passage) and a returningpassage 46 g (a second passage). The dividingpassage 46 f is divided from thefilter installation space 46 c and is opened from theinstallation portion 46 e. That is, the dividingpassage 46 f is provided to be divided from the passage between thepump 41 and theoil filter 42. The open position of the dividingpassage 46 f in theinstallation portion 46 e is set to a position facing the inflow hole of thecontrol valve 45. As described above, since the gasket is interposed between thecontrol valve 45 and theinstallation portion 46 e, the dividingpassage 46 f is liquid-tightly connected to the inflow hole of thecontrol valve 45. That is, the dividingpassage 46 f is directly connected to thefilter installation space 46 c and thecontrol valve 45. The dividingpassage 46 f is formed by extension hole portions which extend in a predetermined direction, and the predetermined end portion of the extension hole is sealed by aset screw 46 h (a slotted set screw) threaded thereinto. - The returning
passage 46 g is provided between theinstallation portion 46 e and the rear surface of theoil tank cover 46. One end of the returningpassage 46 g is opened from theinstallation portion 46 e, and the other end thereof is opened from the rear surface of the oil tank cover 46 (that is, the interior of the oil tank 34). The open position of the returningpassage 46 g in theinstallation portion 46 e is set to a position facing the outflow hole of thecontrol valve 45. As described above, since the gasket is interposed between thecontrol valve 45 and theinstallation portion 46 e, the returningpassage 46 g is liquid-tightly connected to the outflow hole of thecontrol valve 45. That is, the returningpassage 46 g is directly connected to the interior of theoil tank 34 by thecontrol valve 45. - A lubricant supply operation of the
supply unit 40 will be described. - First, the
first blocking valve 43 and thesecond blocking valve 44 are opened by the operation of thefirst handle 43 a and thesecond handle 44 a. By the operation of thepump 41, the lubricant stored in theoil tank 34 is sent toward thefirst pre-filtering passage 46 b. The lubricant sent to thefirst pre-filtering passage 46 b flows into thefilter installation space 46 c through thefirst blocking valve 43 and thesecond pre-filtering passage 46 d. The lubricant is filtered while flowing into theoil filter 42 provided in thefilter installation space 46 c. By this filtering, minute metal powder or sludge contained in the lubricant is removed. The lubricant filtered by theoil filter 42 is sent to thesecond supply pipe 47 through thesecond blocking valve 44. The lubricant sent to thesecond supply pipe 47 is supplied to thenozzle 35 through thesupply pipe 36, and is sprayed from thenozzle 35 to the sliding position. - Part of the lubricant flowing into the
filter installation space 46 c flows through the dividingpassage 46 f and flows into thecontrol valve 45. The lubricant passing through thecontrol valve 45 and flowing out from thecontrol valve 45 flows through the returningpassage 46 g and returns into theoil tank 34 again. By the operation of thethird handle 45 a, it is possible to adjust of the flow rate of the lubricant divided from thefilter installation space 46 c, flowing through the dividingpassage 46 f, thecontrol valve 45, and the returningpassage 46 g, and returning into theoil tank 34. When the flow rate of the lubricant passing through thecontrol valve 45 and returning to theoil tank 34 increases, the flow rate of the lubricant passing through thesecond supply pipe 47 and flowing toward thenozzle 35 decreases. For this reason, it is possible to adjust the flow rate of the lubricant supplied to the sliding position of theturbo compressor 4 by operating thethird handle 45 a. As described above, the lubricant supply operation in thesupply unit 40 is completed. - Since the dividing
passage 46 f and the returningpassage 46 g are opened from theinstallation portion 46 e, when thecontrol valve 45 is provided in theinstallation portion 46 e, the dividingpassage 46 f and the returningpassage 46 g are both directly connected to thecontrol valve 45. Accordingly, it is possible to decrease the number of components such as pipes connecting thecontrol valve 45 to thepump 41 and theoil tank 34. When the number of components is decreased, it is possible to simplify the assembly of thesupply unit 40 and to suppress oil leakage. - Further, the lubricant returning into the
oil tank 34 through thecontrol valve 45 is the lubricant divided before passing through theoil filter 42. For this reason, it is possible to suppress the amount of the lubricant filtered at theoil filter 42 and to extend the durability of theoil filter 42. - Next, an operation of the
turbo compressor 4 of the embodiment will be described. - First, rotation power of the
motor 12 is transmitted to therotation shaft 23 through thespur gear 31 and thepinion gear 32. Accordingly, thefirst impeller 21 a and thesecond impeller 22 a of thecompressor unit 20 are rotationally driven. - When the
first impeller 21 a is rotationally driven, thesuction port 21 d of thefirst compression stage 21 becomes a negative pressure state, and the refrigerant gas X4 flows from the passage R5 into thefirst compression stage 21 through thesuction port 21 d. The refrigerant gas X4 flowing into thefirst compression stage 21 flows into thefirst impeller 21 a in the thrust direction, and is discharged in the radial direction while kinetic energy is applied thereto by thefirst impeller 21 a. The refrigerant gas X4 discharged from thefirst impeller 21 a is compressed by thefirst diffuser 21 b by converting kinetic energy into potential energy. The refrigerant gas X4 discharged from thefirst diffuser 21 b is guided to the outside of thefirst compression stage 21 through thefirst scroll chamber 21 c. The refrigerant gas X4 guided to the outside of thefirst compression stage 21 is supplied to thesecond compression stage 22 through an external pipe (not shown). - The refrigerant gas X4 supplied to the
second compression stage 22 flows into thesecond impeller 22 a in the thrust direction through theintroduction scroll chamber 22 d, and is discharged in the radial direction while kinetic energy is applied thereto by thesecond impeller 22 a. The refrigerant gas X4 discharged from thesecond impeller 22 a is further compressed by converting kinetic energy into potential energy by thesecond diffuser 22 b, so that it becomes the compressed refrigerant gas X1. The compressed refrigerant gas X1 discharged from thesecond diffuser 22 b is guided the outside of thesecond compression stage 22 through thesecond scroll chamber 22 c. The compressed refrigerant gas X1 guided to the outside of thesecond compression stage 22 is supplied to thecondenser 1 through the passage R1. - As described above, the operation of the
turbo compressor 4 is completed. - According to the embodiment, the following advantages may be obtained.
- According to the embodiment, there is an advantage in that the number of supply pipes or nozzles supplying the lubricant to the
fourth bearing 27 and the meshing portion 38 may be decreased. Further, in theturbo compressor 4 and the turbo refrigerator S1 including the turbo compressor, there is an advantage in that manufacturing effort and cost may be reduced. - While preferred embodiments of the present invention have been described and illustrated above, it should be understood that these are examples of the present invention and are not to be considered as limiting. Additions, omissions, substitutions, and other modifications can be made without departing from the spirit or scope of the present invention. Accordingly, the present invention is not to be considered as being limited by the foregoing description, and is only limited by the scope of the appended claims.
- For example, in the above-described embodiment, the dividing
passage 46 f and the returningpassage 46 g are both opened from theinstallation portion 46 e, but the present invention is not limited thereto. For example, any one of them may be opened from theinstallation portion 46 e. Only by a configuration in which one passage is opened from theinstallation portion 46 e, the number of components such as pipes may be decreased. - Further, in the above-described embodiment, the dividing
passage 46 f is divided from thefilter installation space 46 c, but the present invention is not limited thereto. For example, the dividing passage may be divided from the passage through which the lubricant filtered at theoil filter 42 flows. - Further, in the above-described embodiment, the
installation portion 46 e is formed in a planar shape, but only the gap between theinstallation portion 46 e and thecontrol valve 45 may be liquid-tightly sealed. For example, a step portion may be provided between the dividingpassage 46 f and the returningpassage 46 g in theinstallation portion 46 e.
Claims (8)
1. A turbo compressor comprising:
a pump which sends lubricant stored in an oil tank having an open portion;
a control valve which adjusts the flow rate of the lubricant returning to the oil tank by dividing the stream of the lubricant sent from the pump; and
an oil tank cover which blocks the open portion and is provided with an installation portion for the control valve,
wherein the oil tank cover includes at least one of a first passage opened from the installation portion and allowing the stream of the lubricant sent from the pump to be divided and flow toward the control valve and a second passage opened from the installation portion and allowing the lubricant to flow from the control valve toward the oil tank.
2. The turbo compressor according to claim 1 , further comprising:
an oil filter which is provided at the oil tank cover and filters the lubricant sent from the pump,
wherein the first passage is provided to be divided from the passage between the pump and the oil filter.
3. The turbo compressor according to claim 1 , wherein the installation portion is formed in a planar shape.
4. The turbo compressor according to claim 2 , wherein the installation portion is formed in a planar shape.
5. A turbo refrigerator comprising:
a condenser which cools and liquefies a compressed refrigerant;
an evaporator which evaporates the liquefied refrigerant and takes evaporation heat from a cooling object to cool the cooling object; and
a compressor which compresses the refrigerant evaporated from the evaporator and supplies the compressed refrigerant to the condenser,
wherein the turbo compressor according to claim 1 is used as the compressor.
6. A turbo refrigerator comprising:
a condenser which cools and liquefies a compressed refrigerant;
an evaporator which evaporates the liquefied refrigerant and takes evaporation heat from a cooling object to cool the cooling object; and
a compressor which compresses the refrigerant evaporated from the evaporator and supplies the compressed refrigerant to the condenser,
wherein the turbo compressor according to claim 2 is used as the compressor.
7. A turbo refrigerator comprising:
a condenser which cools and liquefies a compressed refrigerant;
an evaporator which evaporates the liquefied refrigerant and takes evaporation heat from a cooling object to cool the cooling object; and
a compressor which compresses the refrigerant evaporated from the evaporator and supplies the compressed refrigerant to the condenser,
wherein the turbo compressor according to any one of claim 3 is used as the compressor.
8. A turbo refrigerator comprising:
a condenser which cools and liquefies a compressed refrigerant;
an evaporator which evaporates the liquefied refrigerant and takes evaporation heat from a cooling object to cool the cooling object; and
a compressor which compresses the refrigerant evaporated from the evaporator and supplies the compressed refrigerant to the condenser,
wherein the turbo compressor according to claim 4 is used as the compressor.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2010081123A JP5434746B2 (en) | 2010-03-31 | 2010-03-31 | Turbo compressor and turbo refrigerator |
JPP2010-081123 | 2010-03-31 |
Publications (1)
Publication Number | Publication Date |
---|---|
US20110243710A1 true US20110243710A1 (en) | 2011-10-06 |
Family
ID=44696100
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/074,310 Abandoned US20110243710A1 (en) | 2010-03-31 | 2011-03-29 | Turbo compressor and turbo refrigerator |
Country Status (3)
Country | Link |
---|---|
US (1) | US20110243710A1 (en) |
JP (1) | JP5434746B2 (en) |
CN (1) | CN102207094B (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20150159668A1 (en) * | 2012-08-28 | 2015-06-11 | Ihi Corporation | Turbo compressor and turbo refrigerator |
US20160116190A1 (en) * | 2013-06-04 | 2016-04-28 | Daikin Industries, Ltd. | Turbo refrigerator |
US20220196026A1 (en) * | 2019-09-10 | 2022-06-23 | Howden Roots Llc | Air compressor and blower |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4441863A (en) * | 1981-01-27 | 1984-04-10 | Nippondenso Co., Ltd. | Variable discharge rotary compressor |
US5199858A (en) * | 1990-08-31 | 1993-04-06 | Kabushiki Kaisha Kobe Seiko Sho | Oil injection type screw compressor |
JPH05231370A (en) * | 1992-02-20 | 1993-09-07 | Hitachi Ltd | Positive displacement type rotating fluid machine |
JPH07218010A (en) * | 1994-01-28 | 1995-08-18 | Ebara Corp | Turbo-refrigerator |
US5606872A (en) * | 1993-09-13 | 1997-03-04 | Hitachi, Ltd. | Compression type refrigerator |
US5675978A (en) * | 1996-11-26 | 1997-10-14 | American Standard Inc. | Oil management apparatus for a refrigeration chiller |
US6237362B1 (en) * | 1999-12-30 | 2001-05-29 | Halla Climate Control Corp. | Internal oil separator for compressors of refrigeration systems |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3390527B2 (en) * | 1994-06-15 | 2003-03-24 | フォーゲルジャパン株式会社 | Depressurization method of intermittent greasing system |
JPH10141036A (en) * | 1996-09-13 | 1998-05-26 | Nippon Soken Inc | Lubrication hydraulic circuit for internal combustion engine |
JP4572462B2 (en) * | 2000-10-24 | 2010-11-04 | 日本精工株式会社 | Lubrication device |
CN2507999Y (en) * | 2001-12-07 | 2002-08-28 | 贵阳风云通用机械新技术开发有限公司 | Independent lubricating device for turbocharger |
CN201080850Y (en) * | 2007-09-11 | 2008-07-02 | 露笑集团有限公司 | Independent lubricating system for externally oil-supplied turbo-charger |
JP5136096B2 (en) * | 2008-02-06 | 2013-02-06 | 株式会社Ihi | Turbo compressor and refrigerator |
JP5176574B2 (en) * | 2008-02-06 | 2013-04-03 | 株式会社Ihi | Turbo compressor and refrigerator |
JP5167845B2 (en) * | 2008-02-06 | 2013-03-21 | 株式会社Ihi | Turbo compressor and refrigerator |
JP2009257684A (en) * | 2008-04-18 | 2009-11-05 | Ebara Refrigeration Equipment & Systems Co Ltd | Compression refrigerating machine and method for recovering lubricating oil for the same |
-
2010
- 2010-03-31 JP JP2010081123A patent/JP5434746B2/en not_active Expired - Fee Related
-
2011
- 2011-03-29 US US13/074,310 patent/US20110243710A1/en not_active Abandoned
- 2011-03-30 CN CN201110078263.0A patent/CN102207094B/en active Active
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4441863A (en) * | 1981-01-27 | 1984-04-10 | Nippondenso Co., Ltd. | Variable discharge rotary compressor |
US5199858A (en) * | 1990-08-31 | 1993-04-06 | Kabushiki Kaisha Kobe Seiko Sho | Oil injection type screw compressor |
JPH05231370A (en) * | 1992-02-20 | 1993-09-07 | Hitachi Ltd | Positive displacement type rotating fluid machine |
US5606872A (en) * | 1993-09-13 | 1997-03-04 | Hitachi, Ltd. | Compression type refrigerator |
JPH07218010A (en) * | 1994-01-28 | 1995-08-18 | Ebara Corp | Turbo-refrigerator |
US5675978A (en) * | 1996-11-26 | 1997-10-14 | American Standard Inc. | Oil management apparatus for a refrigeration chiller |
US6237362B1 (en) * | 1999-12-30 | 2001-05-29 | Halla Climate Control Corp. | Internal oil separator for compressors of refrigeration systems |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20150159668A1 (en) * | 2012-08-28 | 2015-06-11 | Ihi Corporation | Turbo compressor and turbo refrigerator |
US9664200B2 (en) * | 2012-08-28 | 2017-05-30 | Daikin Industries, Ltd. | Turbo compressor and turbo refrigerator |
US20160116190A1 (en) * | 2013-06-04 | 2016-04-28 | Daikin Industries, Ltd. | Turbo refrigerator |
US10234175B2 (en) * | 2013-06-04 | 2019-03-19 | Daikin Industries, Ltd. | Turbo refrigerator |
US20220196026A1 (en) * | 2019-09-10 | 2022-06-23 | Howden Roots Llc | Air compressor and blower |
Also Published As
Publication number | Publication date |
---|---|
JP5434746B2 (en) | 2014-03-05 |
JP2011214443A (en) | 2011-10-27 |
CN102207094B (en) | 2014-12-10 |
CN102207094A (en) | 2011-10-05 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP5167845B2 (en) | Turbo compressor and refrigerator | |
JP5262155B2 (en) | Turbo compressor and refrigerator | |
JP5197141B2 (en) | Two-stage screw compressor and refrigeration system | |
JP5577762B2 (en) | Turbo compressor and turbo refrigerator | |
US9027362B2 (en) | Turbo compressor and turbo refrigerator | |
US8959949B2 (en) | Turbo compressor | |
JP5614050B2 (en) | Turbo compressor and turbo refrigerator | |
EP3023645A1 (en) | Turbo compressor and turbo refrigerator | |
US20110243710A1 (en) | Turbo compressor and turbo refrigerator | |
US20110219812A1 (en) | Turbo compressor and turbo refrigerator | |
JP5272942B2 (en) | Turbo compressor and refrigerator | |
US8756954B2 (en) | Turbo compressor and turbo refrigerator | |
JP5136096B2 (en) | Turbo compressor and refrigerator | |
US20160153462A1 (en) | Turbo compressor and turbo refrigerating machine | |
JP5272941B2 (en) | Turbo compressor and refrigerator | |
US20110219813A1 (en) | Turbo compressor and turbo refrigerator | |
JP5545326B2 (en) | Turbo compressor and refrigerator | |
US8920118B2 (en) | Casing structure | |
US9416681B2 (en) | Turbo compressor | |
CN111102190B (en) | Compressor, air conditioning system and control method |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: IHI CORPORATION, JAPAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:KURIHARA, KAZUAKI;SUGITANI, NORIYASU;ODA, KENTAROU;AND OTHERS;REEL/FRAME:026041/0306 Effective date: 20110324 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |