WO2012053438A1 - 鉄道車両用空気圧縮装置 - Google Patents

鉄道車両用空気圧縮装置 Download PDF

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Publication number
WO2012053438A1
WO2012053438A1 PCT/JP2011/073637 JP2011073637W WO2012053438A1 WO 2012053438 A1 WO2012053438 A1 WO 2012053438A1 JP 2011073637 W JP2011073637 W JP 2011073637W WO 2012053438 A1 WO2012053438 A1 WO 2012053438A1
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WO
WIPO (PCT)
Prior art keywords
oil
port
compressor
valve body
air
Prior art date
Application number
PCT/JP2011/073637
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
浜崎充良
久我崇
水船徹
中川裕
Original Assignee
ナブテスコ株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ナブテスコ株式会社 filed Critical ナブテスコ株式会社
Priority to CN201180049945.7A priority Critical patent/CN103154516B/zh
Priority to JP2012539701A priority patent/JP5470467B2/ja
Publication of WO2012053438A1 publication Critical patent/WO2012053438A1/ja

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/02—Lubrication
    • F04B39/0207—Lubrication with lubrication control systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/02—Lubrication; Lubricant separation
    • F04C29/021—Control systems for the circulation of the lubricant
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C18/12—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F04C18/14—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
    • F04C18/16—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type

Definitions

  • the present invention relates to an air compressor for a railway vehicle that is installed in a railway vehicle and generates compressed air used in the railway vehicle.
  • an air compressor for a railway vehicle that generates compressed air used in the railway vehicle is installed.
  • an oil-cooled air compressor disclosed in Patent Document 1 is known.
  • the oil-cooled air compressor disclosed in Patent Document 1 is configured as an air compression device that generates compressed air by separating oil from compressed air after compressing air with oil.
  • this air compression apparatus is comprised so that the removal of compression heat, the sealing by an oil film, and lubrication can be performed.
  • an oil recovery unit having an oil tank, an oil cooler that cools the oil recovered in the oil tank, and an oil temperature adjustment valve , Etc. are provided.
  • the oil recovery unit is configured such that compressed air compressed with oil in the compressor is guided to collect the oil in an oil tank, and communicates with an oil supply path that supplies the compressor with oil.
  • the oil temperature adjustment valve adjusts the temperature (oil temperature) of the oil in the oil tank between a state in which the oil is circulated in the oil cooler and a state in which the oil circulation is regulated in accordance with the oil temperature in the oil tank. It is configured to switch to either state.
  • the oil separator 3 as said oil recovery device is disclosed, the oil cooler 5 as said oil cooler is disclosed, and the oil temperature adjusting valve 51 as said oil temperature adjusting valve.
  • the oil temperature adjustment valve 51 a valve that uses a bimetal mechanism or the like and operates independently according to the oil temperature is disclosed.
  • oil is essential for cooling and lubrication.
  • an air compressor used as an air compressor for a railway vehicle
  • a check is periodically made as to whether or not the oil amount is at an appropriate level, for example, after operation of the railway vehicle.
  • the operator confirms the oil level with an oil level gauge installed in the oil recovery device and capable of measuring the position of the oil level in the oil tank, and replenishes oil as necessary.
  • the present invention has an object to provide an air compressor for a railway vehicle that can easily and accurately determine whether or not oil replenishment is necessary in view of the above situation.
  • a railcar air compressor for achieving the above object is a railcar air compressor that is installed in a railcar and generates compressed air used in the railcar.
  • a compressor for compressing air an oil supply path for supplying oil to the compressor, and an oil tank, in which compressed air compressed with oil is induced, and the compressed air thus induced
  • the oil is separated from the oil tank and collected in the oil tank, and the oil collector that communicates with the oil supply path, the oil cooler that cools the oil collected in the oil tank, and the temperature of the oil in the oil tank.
  • An oil temperature adjusting valve that adjusts the oil temperature by switching between a state in which the oil is circulated in the oil cooler and a state in which the circulation of the oil is regulated according to a certain oil temperature.
  • the oil temperature adjusting valve communicates with the oil recovery unit, the oil temperature adjusting valve, and the oil cooled in the oil cooler flows from the oil recovery unit.
  • a second port that communicates with an inflow portion of the oil cooler, a third port that communicates with an outflow portion of the oil cooler through which oil cooled in the oil cooler flows, and the compressor
  • a main body provided with a fourth port that communicates with the main body, and is slidably installed inside the main body.
  • the first port and the second port communicate with each other, and the third port and the fourth port communicate with each other.
  • a valve body whose position can be switched between a regulation position for regulating the circulation of oil to the oil cooler, and a valve body which operates independently according to the oil temperature, and between the circulation position and the regulation position.
  • a valve body drive unit that drives the valve body so as to switch the position of the body, and a restriction position communication part that communicates the second port with the first port when the valve body is in the restriction position. It is characterized by.
  • the oil temperature adjusting valve Depending on the oil temperature, the state can be switched between a state in which oil is circulated through the oil cooler and a state in which the circulation of oil is restricted. For this reason, when the oil temperature becomes high, the oil is cooled and the oil temperature is adjusted. And the position of a valve body is switched between a circulation position and a regulation position by the self-supporting valve body drive part which operates independently according to oil temperature.
  • the restriction position communicating portion may be a mechanism provided integrally with the valve body, or may be a mechanism provided so as to be operable independently of the valve body.
  • a railcar air compressor is the railcar air compressor of the first aspect, wherein the restriction position communicating portion is provided as a through hole formed in the valve body, and one of the through holes is provided in the through hole.
  • the opening is provided between the second port and the third port or the fourth port when the valve body is in the restricting position and opposed to the second port.
  • the main body portion is shielded by a wall portion.
  • the restriction position communicating portion is provided as a through hole formed in the valve body.
  • the restriction position communicating portion can be easily constructed with a simple structure.
  • One opening in the restriction position communicating portion provided as a through hole communicates with the second port only at the restriction position, and is shielded by a wall portion between the second port and the third or fourth port at the circulation position. Is done.
  • the first port, the third port, and the fourth port are prevented from communicating with each other by the through hole serving as the restriction position communication portion, and the oil recovery device side is connected to the outflow portion side of the oil cooler and the compression portion. It is prevented that the circulation of the oil to the oil cooler is obstructed by communicating with the machine side.
  • FIG. 1 is a system diagram schematically showing a system configuration of an air compressor for a railway vehicle according to an embodiment of the present invention. It is a schematic diagram for demonstrating the flow path
  • the present embodiment is an air compressor for a railway vehicle that is installed in a railway vehicle and generates compressed air that is used in the railway vehicle, and separates the oil from the compressed air after compressing the air with the oil. Therefore, the present invention can be widely applied to an air compressor for railway vehicles that generates compressed air.
  • FIG. 1 is a system diagram schematically showing a system configuration of a railway vehicle air compressor 1 (hereinafter also simply referred to as “air compressor 1”) according to an embodiment of the present invention.
  • the air compressor 1 shown in FIG. 1 is installed in a railway vehicle (not shown).
  • generated in this air compressor 1 is used in order to operate pneumatic equipment, such as braking equipment, in a railway vehicle.
  • this air compression apparatus 1 is installed in each vehicle in the formation of a railway vehicle, for example. *
  • 1 includes a housing case 11, a compressor 12, a compressor drive unit 13, a coupling 14, a coupling case 15, a cooling fan 16, an after cooler 17, an air suction unit 18, and a compressed air delivery unit. 19, oil supply path 20, oil recovery device 21, oil separation element 22, water oil separator 23, dehumidifier 24, oil cooler 25, oil temperature adjustment valve 26, oil level gauge 27, and the like. Yes.
  • the air compressor 1 is configured as a device that compresses the air sucked from the air suction unit 18 with the compressor 12 and cools it with the aftercooler 17 and then sends it out as compressed air from the compressed air delivery unit 19.
  • the air compressor 1 is accompanied by oil by including an oil supply path 20, an oil recovery unit 21, an oil separation element 22, a water / oil separator 23, an oil cooler 25, an oil temperature adjustment valve 26, and the like.
  • After compressing air it is comprised as an apparatus which isolate
  • each component in the air compressor 1 will be described in detail.
  • the storage case 11 includes a compressor 12, a compressor drive unit 13, a coupling case 15, a cooling fan 16, an after cooler 17, an oil supply path 20, an oil recovery unit 21, an oil separation element 22, an oil separator 23, It is provided as a box-shaped housing that houses the dehumidifier 24, the oil cooler 25, and the like. And in this storage case 11, the air suction part 18 and the compressed air delivery part 19 are installed in the wall part.
  • the air suction portion 18 installed in the housing case 11 is provided as a mechanism for sucking air (outside air) compressed by the compressor 12 and is provided so as to communicate with the compressor 12.
  • the air suction portion 18 is provided with a suction filter 18a that suppresses passage of dust such as dust when the sucked air passes.
  • the compressed air delivery unit 19 is provided as a mechanism for delivering the compressed air cooled by the aftercooler 17.
  • the compressed air delivery unit 19 is installed outside the housing case 11 so as to supply the generated compressed air to an air tank (compressed air reservoir) (not shown) that stores the compressed air. It is provided as a piping system extending toward
  • the housing case 11 is provided with a filter portion 28 in a wall portion located on the upstream side of the flow of the cooling air generated by the cooling fan 16.
  • the filter unit 28 is provided as a wire mesh attached to the housing case 11.
  • the cooling fan 16 rotates, outside air serving as cooling air is sucked through the filter unit 28.
  • the flow of the sucked outside air and the flow of the air in a dry state are indicated by thick arrows that are white and have only an outer shape.
  • the flow of air including oil droplets, water droplets, and water vapor is indicated by thick arrows in a hatched state.
  • the oil flow is indicated by thin arrows.
  • the compressor 12 communicates with the air suction portion 18 and is configured to compress the air sucked from the outside via the air suction portion 18.
  • the compressor 12 is configured to communicate with the air suction portion 18 via a suction valve 29 formed integrally with the compressor body.
  • the suction valve 29 includes a valve body, a valve seat on which the valve body can be seated and separated, and a spring that urges the valve body in a direction to seat the valve body on the valve seat. Then, when the compressor 12 is activated and the compressor 12 side becomes negative pressure, the valve body separates from the valve seat against the spring force of the spring by the pressure of the outside air, and air is sucked into the compressor 12. It will be.
  • the compressor 12 is provided as, for example, a screw type air compressor having a pair of screws that rotate in opposite directions to compress air. Inside the compressor main body in which the screw is disposed, the air pressure increases from the portion communicating with the suction valve 29 to the portion communicating with the oil recovery device 21.
  • the compressor 12 is a scroll type air compressor, or a reciprocating type air compressor in which the rotational driving force from the compressor driving unit 13 is converted into a reciprocating driving force via a crankshaft and transmitted and driven, Etc. may be provided.
  • the compressor drive unit 13 includes an electric motor 13a and is provided as a drive mechanism that rotationally drives the compressor 12.
  • the compressor driving unit 13 is provided as a driving mechanism that is provided only with the electric motor 13a and is not provided with a reduction gear portion is illustrated, but this need not be the case. That is, the compressor drive unit 13 may be provided as a motor with a speed reducer including a speed reducer portion connected to the electric motor 13a.
  • the coupling 14 is configured to connect the compressor driving unit 13 and the compressor 12 to transmit the driving force of the compressor driving unit 13 to the compressor 12, and is provided as a shaft coupling, for example.
  • the coupling case 15 is provided as a box-like body that accommodates the coupling 14.
  • the coupling case 15 is disposed between the compressor 12 and the compressor driving unit 13 and is coupled to the compressor 12 and the compressor driving unit 13.
  • the cooling fan 16 is attached to the compressor drive unit 13 at the end opposite to the side to which the coupling 15 is connected.
  • the cooling fan 16 is provided as an axial fan and includes a propeller portion and a cylindrical case portion (not shown) installed around the propeller portion. And the cooling fan 16 is installed so that the driving force of the rotating shaft of the electric motor 13a may be transmitted to the propeller unit on the side opposite to the coupling side.
  • the cooling fan 16 is rotationally driven by the driving force from the electric motor 13 a, and is thereby configured to generate a flow of cooling air by the air sucked from the filter unit 28.
  • the case where the cooling fan 16 is an axial fan is illustrated, but this need not be the case, and other forms of cooling fans such as a sirocco fan can be used.
  • the after-cooler 17 is provided as a heat exchanger that cools the compressed air that has been compressed by the compressor 12 and remains compressed.
  • the aftercooler 17 is disposed on the upstream side of the flow of cooling air generated by the cooling fan 16 with respect to the cooling fan 16 (note that FIG. 1 is a schematic diagram schematically showing a housing case. 11 does not specify the arrangement of the after-cooler 17 within 11).
  • the aftercooler 17 is cooled from the outside by the cooling air generated by the cooling fan 16, and the compressed air passing through the inside of the aftercooler 17 is further cooled.
  • the aftercooler 17 is integrally formed with the oil cooler 25. Further, the aftercooler 17 may be disposed on the downstream side of the cooling air flow generated by the cooling fan 16 with respect to the cooling fan 16.
  • the oil recovery unit 21 includes an oil-filled compressed air discharge path 21a and an oil tank 21b.
  • the oil-filled compressed air discharge path 21a is provided as a path communicating with the compressor 12 and the oil tank 21b.
  • the compressed air compressed with oil in the compressor 12 is guided to the oil tank 21b via the oil-containing compressed air discharge path 21a, and the oil discharged from the oil-containing compressed air discharge path 21a together with the compressed air is oil. It will be collected in the tank 21b.
  • the separator 30 is installed in the discharge part in the oil tank 21b in the compressed air discharge path 21a containing oil.
  • the separator 30 When compressed air with oil is guided through the compressed air discharge passage 21a containing oil and discharged from the discharge portion, the oil is separated from the compressed air by the separator 30 and scattered in the oil tank 21b. It falls by gravity and is collected in the oil tank 21b.
  • the oil tank 21b is in a state where the recovered oil 31 is stored.
  • the oil level gauge 27 is installed in the oil tank 21 b in the oil recovery device 21. And it is provided as a measurement means which can measure the position of the oil level of the oil 31 in the oil tank 21b. An operator who confirms the oil level in the oil tank 21b confirms the position of the oil level with the oil level gauge 27.
  • the oil level indicator 27 various types of oil level indicators can be used. For example, use an oil level gauge, float type oil level gauge, ultrasonic type oil level gauge, pressure type oil level gauge, etc. provided as a window part where the operator can visually recognize the oil level position from the outside. Can do.
  • the oil tank 21b is provided with a temperature switch 32 as a temperature sensor for detecting the temperature (oil temperature) of the oil 31 in the oil tank 21b.
  • the temperature switch 32 is provided as a temperature sensor that outputs a signal for forcibly stopping the entire apparatus when the detected oil temperature is equal to or higher than a predetermined upper limit temperature.
  • the oil supply path 20 is installed so as to communicate with the oil tank 21 b of the oil recovery unit 21 and the compressor 12, and is provided as a path for supplying oil from the oil tank 21 b to the compressor 12.
  • the oil supply path 20 communicates with the compressor main body in the compressor 12 on the suction side communicating with the suction valve 29 and on the low pressure side where the pressure is low.
  • the oil supply path 20 is configured to communicate with the oil tank 21b at a position lower than the oil level of the oil 31 in the oil tank 21b. Since the oil supply path 20 communicates with the compressor 12 and the oil tank 21b in this way, the compressed air discharged from the oil-filled compressed air discharge path 21a pushes down the oil surface of the oil 31, and thus the oil supply path 20 The oil is supplied to the compressor 12 via.
  • an oil filter 20 a as a filter element is disposed, and foreign matter in the oil tank 21 b (for example, a scum-like substance in which deteriorated oil is aggregated) is contained in the compressor 12. Is prevented from being supplied.
  • the oil separation element 22 is disposed in a path that connects the oil tank 21 b of the oil recovery device 21 and the aftercooler 17, and is compressed from the compressed air that has been compressed with oil in the compressor 12 and passed through the oil recovery device 21. Furthermore, it comprises a filter element for separating oil. In the oil separation element 22, fine oil droplets that have not been collected by the oil collector 21 are separated from the compressed air.
  • a compressor communication path 33 is provided from the oil separation element 22 so as to extend toward the compressor 12 or the suction valve 29.
  • the compressor communication path 33 is installed so that the lower part in the housing portion of the oil separation element 22 communicates with the compressor 12, and the oil separated by the oil separation element 22 is pushed up by the compressed air. It is configured to be supplied to the compressor 12.
  • the compressor communication passage 33 is provided with a throttle for suppressing the amount of compressed air passing therethrough.
  • the path connecting the oil separation element 22 and the aftercooler 17 has a pressure-retaining check valve 34 that allows passage of compressed air that exceeds a predetermined pressure to the aftercooler 17 side, and a pressure of the compressed air. And a safety valve 35 for releasing compressed air to the outside when the pressure exceeds an excessive pressure.
  • the water-oil separator 23 is disposed in a path that connects the aftercooler 17 and the dehumidifier 24 and includes a plurality of filter elements that separate moisture and oil from the compressed air cooled by the aftercooler 17. It is configured. In the water / oil separator 23, moisture is separated from the compressed air, and a small amount of oil that has not been separated in the oil separation element 22 is also separated from the compressed air. In addition, the water
  • the dehumidifier 24 is disposed between the water-oil separator 23 and the compressed air delivery unit 19, and is a desiccant that further dehumidifies the compressed air from which water and oil have been separated by the water-oil separator 23. Or a filter element that performs dehumidification of a hollow fiber membrane system. In the dehumidifier 24, the final dehumidification is performed on the compressed air delivered from the compressed air delivery unit 19.
  • a check valve 37 that allows passage of compressed air having a predetermined pressure or higher to the compressed air delivery unit 19 side is provided in an air tank (compression) (not shown) in a path that connects the dehumidifier 24 and the compressed air delivery unit 19. It is provided to prevent the backflow of compressed air from the air reservoir.
  • the oil cooler 25 is provided so as to communicate with the oil tank 21b side and the compressor 12 side in the oil supply path 20 via the oil temperature adjustment valve 26, and cools the oil in the oil tank 21b and supplies the oil. It is provided as a heat exchanger that can be supplied to the path 20. As described above, the oil cooler 25 is formed integrally with the aftercooler 17. The oil cooler 25 is disposed upstream of the cooling fan 16 and upstream of the oil recovery unit 21 with respect to the cooling air flow (note that FIG. 1 is a schematic diagram schematically showing the system). The arrangement of the oil cooler 25 in the housing case 11 is not specified). And the oil which passes through the inside of the oil cooler 25 is cooled because the oil cooler 25 is cooled from the outside by the cooling air generated by the cooling fan 16. The oil cooler 25 may be disposed on the downstream side of the cooling air flow with respect to the cooling fan 16.
  • the oil cooler 25 communicates with the oil supply path 20 via the oil temperature adjustment valve 26 at two locations, the side communicating with the oil tank 21 b and the side communicating with the compressor 12. Is provided. Thereby, the oil cooler 25 takes in and cools the oil flowing into the oil supply path 20 from the oil tank 21b through the oil path 38a branched from the oil supply path 20 via the oil temperature regulating valve 26, and the cooled oil Is returned to the oil supply path 20 via the oil temperature adjustment valve 26 via the oil path 38b.
  • the flow of the oil returning to the oil supply path 20 through cooling in the oil cooler 25 is performed by the compressed air discharged from the oil-containing compressed air discharge path 21 a pushing down the oil surface of the oil 31.
  • FIG. 2 is a schematic diagram for explaining the flow path of oil through the oil temperature adjustment valve 26 in the air compressor 1.
  • the oil temperature adjustment valve 26, the compressor 12, the oil recovery device 21, and the oil cooler 25 are provided as follows. Show.
  • an oil cooler 25 having a structure in which the inflowing oil is cooled and flows out while overflowing the partition wall 25 a is schematically illustrated.
  • the oil temperature adjustment valve 26 is illustrated as a cross-sectional view and the outer shape of some elements is illustrated.
  • the oil temperature adjustment valve 26 will be described in detail. As shown in FIG. 2, the oil temperature adjustment valve 26 is provided at a location where the oil supply path 20 communicates with the oil path 38 a and the oil path 38 b. As a result, the oil temperature adjusting valve 26 has the oil collector 21, the inflow portion 25 b of the oil cooler 25 in which the oil cooled in the oil cooler 25 flows from the oil collector 21, and the oil cooled in the oil cooler 25. It is provided so as to communicate with the compressor 12 and the outflow portion 25 c of the oil cooler 25 that flows out.
  • the oil temperature adjusting valve 26 shown in FIGS. 1 and 2 is either in a state in which oil is circulated through the oil cooler 25 or in a state in which oil circulation is regulated according to the oil temperature, which is the temperature of the oil in the oil tank 21b. It is provided as a valve mechanism that switches to this state and adjusts the oil temperature.
  • the oil temperature adjustment valve 26 includes a main body 39, a valve body 40, a valve body drive unit 41, a communication position restriction unit 42, and the like. The operation of the oil temperature adjusting valve 26 controls the oil temperature in the oil tank 21b and prevents the oil from being oxidized due to the oil temperature being too high.
  • FIG. 3 is an enlarged view of the oil temperature adjusting valve 26 shown in FIG. 2 and 3, the main body 39 includes an internal space in which the valve body 40 is disposed, and a first port 43a, a second port 43b, a third port 43c, and a fourth port that communicate with the internal space. 43d is provided as a block-shaped structure.
  • the main-body part 39 may be comprised with one member, and as shown in FIG. 3, the several member may be comprised combining integrally.
  • the first port 43a is configured to communicate with the oil recovery unit 21 via the oil supply path 20.
  • the second port 43b is configured to communicate with the inflow portion 25b of the oil cooler 25 through the oil path 38a.
  • the third port 43c is configured to communicate with the outflow portion 25c of the oil cooler 25 via the oil path 38b.
  • the fourth port 43d is configured to communicate with the compressor 12 via the oil supply / supply path 20.
  • the valve body 40 is provided as an integrated double cylindrical structure, for example. And this valve body 40 bridge
  • a plurality of bridging portions 40c to be connected are provided.
  • the inner cylinder part 40a is formed in the cylinder shape diameter-reduced in steps, for example from one edge part side to the other edge part side.
  • the outer cylinder part 40b is arrange
  • the bridging portion 40c protrudes radially outward from the outer periphery of the inner cylinder portion 40a toward the outer side in the radial direction, and protrudes at a substantially uniform angle position in the circumferential direction of the inner cylinder portion 40a.
  • a plurality are provided.
  • crosslinking part 40c is integrally formed in the outer periphery of the inner cylinder part 40a, and the other edge part is integrally formed in the inner periphery of the outer cylinder part 40b. For this reason, while the inner cylinder part 40a and the outer cylinder part 40b are integrally connected via the some bridge
  • the valve body 40 is slidably installed inside the main body 39. And the valve body 40 is comprised so that a position can be switched between the circulation position which circulates oil to the oil cooler 25, and the regulation position which regulates the circulation of the oil to the oil cooler 25.
  • FIG. 4 is a schematic diagram for explaining the operation of the oil temperature adjusting valve 26, and shows a state in which the valve body 40 is located at the circulation position.
  • FIG. 2 shows a state where the valve body 40 is located at the restriction position.
  • the switching of the position of the valve body 40 between the circulation position and the restriction position is performed by a valve body drive unit 41 described later.
  • a valve body drive unit 41 described later.
  • the first port 43a and the second port 43b are communicated with each other, and the third port 43c and the fourth port 43d are communicated.
  • the oil cooler 25 is configured to circulate oil.
  • a path through which oil circulates when the valve body 40 is in the circulation position is indicated by a plurality of arrows C.
  • the oil discharged together with the compressed air from the compressor 12 is collected in the oil tank 21b through the oil-containing compressed air discharge path 21a.
  • the oil flows from the oil tank 21b to the inflow portion 25b of the oil cooler 25 through the oil temperature adjustment valve 26. To do.
  • the oil flows into the oil temperature adjusting valve 26 from the first port 43a, flows in the space between the inner cylinder part 40a and the outer cylinder part 40b, and then flows from the second port 43b to the oil path 38a.
  • the oil is cooled in the oil cooler 25, flows out from the outflow portion 25 c, and is sucked into the compressor 12 through the oil temperature adjustment valve 26. At this time, the oil flows into the oil temperature adjusting valve 26 from the third port 43c and flows through the space outside the outer cylinder portion 40b in the main body 39, and then from the fourth port 43d to the oil supply path 20. And leaked.
  • one end side of the outer peripheral side surface 40d (see FIGS. 3 and 4) of the outer cylinder portion 40b of the valve body 40 is connected to the first port 43a, the third port 43c, and It is located at a position in close contact with the first inner peripheral seal surface 39a provided as a wall surface between the fourth port 43d.
  • the other end side of the outer peripheral side surface 40b is in close contact with a second inner peripheral seal surface 39b provided as a wall surface between the second port 43b and the third port 43c and the fourth port 43d in the main body 39.
  • the oil path through which the first port 43a and the second port 43b communicate and the oil path through which the third port 43c and the fourth port 43d communicate are the main body portion.
  • the first and second inner peripheral sealing surfaces 39 (39a, 39b) 39 and the outer peripheral side surface 40d of the outer cylindrical portion 40b are sealed off from each other.
  • valve body 40 is connected to the oil cooler 25 by communicating the first port 43a with the fourth port 43d communicating with the third port 43c in a state where the valve body 40 is located at the restriction position. It is configured to regulate the circulation of oil.
  • a plurality of arrows A indicate paths through which oil circulates when the compressor 12 is in operation and the valve body 40 is in the restricted position.
  • the valve body 40 When the valve body 40 is in the restriction position, the oil discharged together with the compressed air from the compressor 12 is collected in the oil tank 21b through the oil-containing compressed air discharge path 21a. As the compressed air pushes down the oil level of the oil in the oil tank 21b, the oil flows from the oil tank 21b via the oil temperature adjustment valve 26 and is sucked into the compressor 12.
  • the first inner peripheral seal surface 39a and the outer peripheral side surface 40b are separated from each other, and the oil flows into the oil temperature adjustment valve 26 from the first port 43a, and the first inner peripheral seal surface 39a and the outer cylinder After flowing through the space between the portion 40b, the oil flows out from the fourth port 43d to the oil supply path 20.
  • the outer peripheral side surface 40d of the outer cylinder portion 40b is located at a position that is separated from the first inner peripheral seal surface 39a and is in close contact with the second inner peripheral seal surface 39b. is doing.
  • the end surface 40e (refer FIG. 3) of the edge part on the opposite side to the 1st port 43a in the outer cylinder part 40b is the end of the cylindrical part which protrudes in the position corresponding to the 2nd port 43b in the main-body part 39. It is located at a position where it comes into close contact with the end surface 39c of the part.
  • the second port 43b communicates with the first and fourth ports (43a, 43d) via the communication position restriction part 42 described later, and the third port 43c also 1 and the fourth port (43a, 43d). For this reason, in the oil path 38a and the oil path 38b between the oil temperature adjusting valve 26 and the oil cooler 25, as shown by the double-ended arrow B in FIG. become.
  • the valve body drive unit 41 operates independently according to the oil temperature that is the temperature of the oil 31 in the oil tank 21b, and switches the position of the valve body 40 between the circulation position and the restriction position. Is provided as a mechanism for driving the motor. As illustrated in FIGS. 2 to 4, the valve body drive unit 41 includes a spring 44 and a shaft unit 45 in which a bimetal mechanism that changes in volume according to temperature is built, and is a self-supporting type that operates according to temperature. It is configured as a drive mechanism.
  • the spring 44 is provided as a coil spring, for example, and is disposed in the internal space of the main body 39, and is disposed between the outer cylinder 40b and the inner cylinder 40a of the valve body 40.
  • One end of the spring 44 is in contact with the inner wall of the main body 39 at the peripheral portion of the first port 43a, and the other end is in contact with the bridging portion 40c. Accordingly, the spring 44 biases the valve body 40 toward the opposite side to the first port 43a in the main body 39.
  • the shaft portion 45 incorporating the bimetal mechanism has one end attached to the main body 39 and the other end attached to the valve body 40.
  • One end portion of the shaft portion 45 is fitted into and attached to a mounting hole 39d formed in the inner wall of the main body portion 39 on the side opposite to the first port 43a.
  • the other end of the shaft portion 45 is attached to the inner cylinder portion 40a inside the inner cylinder portion 40a.
  • positioned in the inner cylinder part 40a in the axial part 45 is maintained in the state immersed in the oil 31 which has flowed from the oil tank 21b.
  • the axial part 45 is comprised so that it may operate
  • the shaft portion 45 is in a short state when the oil temperature in the oil tank 21b is equal to or lower than a predetermined temperature. For this reason, the valve body 40 is biased to the opposite side to the first port 43a in the main body 39 by the spring force of the spring 44, and the state switched to the restriction position shown in FIG. 2 is maintained. . Thereby, if the oil temperature in the oil tank 21b is a low temperature below a predetermined temperature, the circulation of oil to the oil cooler 25 is restricted, and the oil cooler 25 does not cool the oil.
  • the restricting position communication portion 42 is a through hole formed so as to allow the outer side and the inner side to communicate with each other in the outer cylinder portion 40b of the valve body 40 (hereinafter also referred to as “through hole 42”). It is configured as.
  • one opening in the through hole 42 is disposed so as to face the second port 43b when the valve body 40 is in the restricting position. For this reason, when the valve body 40 is in the restriction position, the state in which the second port 43b communicates with the first port 43a through the through hole 42 is maintained.
  • one opening in the through hole 42 has a wall portion 46 in the main body portion 39 provided between the second port 43 b and the third port 43 c when the valve body 40 is in the circulating position. It arrange
  • Compressed air compressed with oil passes through the oil-containing compressed air discharge path 21a, and is further discharged into the oil tank 21b through the separator 30. Further, the oil separated from the compressed air by the separator 30 is collected in the oil tank 21b. The recovered oil is supplied to the compressor 12 through the oil supply path 20.
  • the compressed air discharged into the oil tank 21b passes through the oil separation element 22 and further oil is separated. Then, the compressed air that has passed through the oil separation element 22 is guided to the aftercooler 17 and cooled in the aftercooler 17. Furthermore, the compressed air cooled by the aftercooler 17 is separated into moisture and oil in the water / oil separator 23, further dehumidified in the dehumidifier 24, and sent from the compressed air delivery unit 19 to the air tank. It will be.
  • the valve body 40 is driven by the valve body drive unit 41 as described above, and as shown in FIG. The valve body 40 is switched to the circulation position. In this state, as described above, the oil circulates in the path from the oil collector 21 through the oil cooler 25 to the compressor 12, and the oil cooler 25 cools the oil.
  • the operation of the compressor 12 is stopped. If the oil temperature in the oil tank 21b is a low temperature equal to or lower than a predetermined temperature at this stop timing, the valve body 40 of the oil temperature adjustment valve 26 is located at the restriction position. And since the driving
  • the position of the valve body 40 is switched from the circulation position to the restricted position by the operation of the valve body drive unit 41, and the valve body 40 is brought into the restricted position. The position will be maintained. Therefore, when the operation of the air compressor 1 is stopped, the position of the valve body 40 is switched to the restriction position after the oil temperature is lowered after a lapse of at least some time.
  • FIG. 5 is a schematic diagram for explaining the operation of the oil temperature adjusting valve 26, and shows the state where the operation of the compressor 12 is stopped and the valve body 40 is located at the restriction position as described above.
  • the flow path of the oil after the operation of the compressor 12 is stopped is indicated by a plurality of arrows D.
  • the opening of the through hole 42 faces the second port 43b, and the second port 43b and the first port 43a communicate with each other. The state will be maintained. For this reason, oil flows out from the oil cooler 25 arranged above the oil tank 21b by gravity. And oil flows out from the outflow part 25c of the oil cooler 25, and also flows out from the inflow part 25b of the oil cooler 25 contrary to the time of oil cooling.
  • the oil flowing out from the inflow portion 25b of the oil cooler 25 flows into the inside of the outer tube portion 40b from the second port 43b through the through hole 42 by gravity through the oil path 38a, and further from the first port 43a.
  • the oil flows out and flows through the oil supply path 20 in the opposite direction to that during operation, and is collected into the oil tank 21b.
  • the oil flowing out from the outflow portion 25c of the oil cooler 25 flows into the inside of the main body 39 from the third port 43c via the oil path 38b by gravity, and further flows out from the first port 43a to supply oil.
  • the path 20 flows in the opposite direction to that during operation and is collected into the oil tank 21b.
  • the adjustment valve 26 switches between a state in which the oil is circulated through the oil cooler 25 and a state in which the circulation of the oil is restricted according to the oil temperature in the oil tank 21b. For this reason, when the oil temperature becomes high, the oil is cooled and the oil temperature is adjusted. Then, the position of the valve body 40 of the oil temperature adjusting valve 26 is switched between the circulation position and the restriction position by a self-supporting valve body driving unit 41 that performs a differential operation independently according to the oil temperature.
  • the oil recovery device 21 side and the inflow portion 25 b side of the oil cooler 25 are connected, and the outflow portion 25 c side of the oil cooler 25 and the compressor 12 are connected. And the oil is cooled.
  • the oil recovery unit 21 side and the compressor 12 side are connected, and the circulation of oil to the oil cooler 25 is restricted.
  • the valve body 40 is operated by the operation of the self-supporting valve body drive unit 41 accompanying the decrease in the oil temperature.
  • the position of the body 40 is switched to the restriction position.
  • the restriction position communicating portion 42 is provided in the oil temperature adjusting valve 26, the state where the second port 43b and the first port 43a communicate with each other is maintained.
  • the state in which the first port 43a communicates with the second port 43b and the third port 43c is maintained after at least some time has passed and the oil temperature has decreased. It will be.
  • the restriction position communication portion 42 is provided as a through hole formed in the valve body 40.
  • the restricting position communication portion 42 can be easily constructed with a simple structure.
  • One opening in the restriction position communication portion 42 provided as a through hole communicates with the second port 43b only at the restriction position, and the wall portion 46 between the second port 43b and the third port 43c at the circulation position. Is shielded by.
  • the first port 43a, the third port 43c, and the fourth port 43d are prevented from communicating with each other through the through hole serving as the restricting position communication portion 42, and the oil cooler 25 is connected to the oil collector 21 side. This prevents the oil circulation to the oil cooler 25 from being inhibited by communicating with the outflow portion 25c side and the compressor 12 side.
  • the restriction position communicating portion may be a mechanism that includes an electromagnetic valve or the like and is provided so as to be operable independently of the valve body.
  • the above-mentioned embodiment demonstrated as an example the form comprised including the axial part in which the bimetal mechanism was incorporated as a form of a valve body drive part, it does not need to be this way.
  • the valve body drive part should just be comprised as a mechanism which operate
  • the present invention can be widely applied to a railway vehicle air compressor that is installed in a railway vehicle and generates compressed air used in the railway vehicle.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressor (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
PCT/JP2011/073637 2010-10-19 2011-10-14 鉄道車両用空気圧縮装置 WO2012053438A1 (ja)

Priority Applications (2)

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CN201180049945.7A CN103154516B (zh) 2010-10-19 2011-10-14 铁道车辆用空气压缩装置
JP2012539701A JP5470467B2 (ja) 2010-10-19 2011-10-14 鉄道車両用空気圧縮装置

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JP7220561B2 (ja) * 2018-12-26 2023-02-10 ナブテスコ株式会社 鉄道車両用空気圧縮システム

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JPH08319976A (ja) * 1995-05-25 1996-12-03 Hitachi Ltd 油冷式空気圧縮機
JPH11201039A (ja) * 1998-01-20 1999-07-27 Mitsubishi Heavy Ind Ltd 空気圧縮装置の運転方法
JP2006226245A (ja) * 2005-02-21 2006-08-31 Mitsubishi Heavy Ind Ltd 空気圧縮装置

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JPS4859427A (zh) * 1971-11-15 1973-08-21
JPS5062751U (zh) * 1973-10-04 1975-06-07
JPH08319976A (ja) * 1995-05-25 1996-12-03 Hitachi Ltd 油冷式空気圧縮機
JPH11201039A (ja) * 1998-01-20 1999-07-27 Mitsubishi Heavy Ind Ltd 空気圧縮装置の運転方法
JP2006226245A (ja) * 2005-02-21 2006-08-31 Mitsubishi Heavy Ind Ltd 空気圧縮装置

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CN103154516B (zh) 2015-12-16
JP5470467B2 (ja) 2014-04-16
CN103154516A (zh) 2013-06-12
TW201226705A (en) 2012-07-01
JPWO2012053438A1 (ja) 2014-02-24

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