WO2015182582A1 - 圧縮空気乾燥システム - Google Patents
圧縮空気乾燥システム Download PDFInfo
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- WO2015182582A1 WO2015182582A1 PCT/JP2015/065031 JP2015065031W WO2015182582A1 WO 2015182582 A1 WO2015182582 A1 WO 2015182582A1 JP 2015065031 W JP2015065031 W JP 2015065031W WO 2015182582 A1 WO2015182582 A1 WO 2015182582A1
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- WIPO (PCT)
- Prior art keywords
- drain
- oil mist
- mist separator
- air dryer
- oil
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
- B01D53/261—Drying gases or vapours by adsorption
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0027—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions
- B01D46/0036—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions by adsorption or absorption
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/66—Regeneration of the filtering material or filter elements inside the filter
- B01D46/70—Regeneration of the filtering material or filter elements inside the filter by acting counter-currently on the filtering surface, e.g. by flushing on the non-cake side of the filter
- B01D46/71—Regeneration of the filtering material or filter elements inside the filter by acting counter-currently on the filtering surface, e.g. by flushing on the non-cake side of the filter with pressurised gas, e.g. pulsed air
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
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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
- F04B39/04—Measures to avoid lubricant contaminating the pumped fluid
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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
- F04B39/16—Filtration; Moisture separation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2600/00—Indexing codes relating to particular elements, systems or processes used on suspension systems or suspension control systems
- B60G2600/66—Humidifying or drying means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
- B60T17/002—Air treatment devices
- B60T17/004—Draining and drying devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/048—Arrangements for compressed air preparation, e.g. comprising air driers, air condensers, filters, lubricators or pressure regulators
Definitions
- the present invention relates to a compressed air drying system for removing oil mist and moisture contained in compressed air sent from a compressor.
- vehicles such as trucks, buses and construction machinery control systems such as brakes and suspensions using compressed air sent from a compressor directly connected to an internal combustion engine.
- the compressed air flowing out from the compressor contains oil mist as an oil component obtained by atomizing the lubricating oil in addition to moisture contained in the atmosphere.
- an air dryer for removing moisture and oil mist from compressed air is used downstream of the compressor (see, for example, Patent Document 1).
- the air dryer removes oil and moisture from the compressed air during the load operation (dehumidification action), while removing the oil and moisture adsorbed from the desiccant during the unload operation (regeneration action) and drains the removed liquid. Drain as liquid. Further, in the air dryer, in order to prevent the drain liquid from being discharged onto the road surface, the drain liquid discharged from the air dryer is discharged to the oil separator. In the oil separator, air containing oil and moisture collides with the impact material and gas-liquid separation is performed to recover the oil and discharge clean air.
- An object of the present invention is to provide a compressed air drying system capable of collecting drain liquid discharged from both an oil mist separator and an air dryer.
- a compressed air drying system that solves the above-described problems is a compressed air drying system that removes oil and moisture contained in compressed air delivered from a compressor.
- An air dryer having a drain discharge port, a capture unit for capturing oil contained in the compressed air as an oil mist, and a drain discharge port for discharging a drain liquid containing the captured oil,
- An oil mist separator provided in a flow path between the compressor and the air dryer; a drain liquid discharged from the air dryer; and a drain storage portion for storing the drain liquid discharged from the oil mist separator.
- a drain outlet of the air dryer and a drain outlet of the oil mist separator It is connected to the drain reservoir.
- the drain liquid discharged from the air dryer and the drain path for discharging the drain liquid discharged from the oil mist separator to the drain storage part, the drain outlet of the air dryer and the oil It is preferable to include a connection portion that connects a drain discharge port of the mist separator to the discharge path.
- the drain discharge port of the oil mist separator is connected to the drain storage part via the connection part and the discharge path, so that the drain liquid discharged from the oil mist separator is collected by the drain storage part. Is possible. Moreover, since the oil mist separator and the air dryer share the discharge path, the space occupied by the compressed air drying system can be reduced.
- the drain discharge port of the air dryer is connected to an upstream discharge path for discharging the drain liquid discharged from the air dryer downstream, and the connecting portion is connected to the oil mist separator. It is preferable to have a first inlet connected to the outlet, a second inlet connected to the upstream discharge path, and an outlet connected to the discharge path.
- the connecting portion since the first inlet of the connecting portion is directly connected to the discharge port of the oil mist separator, for example, the upstream discharge path connected to the oil mist separator and the upstream discharge connected to the air dryer.
- the number of parts can be reduced as compared with the case where the road is connected by the connecting portion.
- entrance and the said outlet of the said connection part are connected by the linear flow path.
- a plurality of the oil mist separators are provided between the air dryer and the compressor, and the first inlet of the connecting portion is connected to the drain outlet of the oil mist separator closest to the compressor. It is preferable.
- the air dryer includes a pressure regulator that outputs a pneumatic signal to a supply path, and a drain valve device that is opened by the pneumatic signal, and the oil mist separator includes a pneumatic signal output from the pressure regulator.
- the drain valve device of the air dryer is connected to the drain valve device of the oil mist separator via the supply path, and the drain valve device of the oil mist separator and the drain valve of the air dryer are provided. Preferably one of the devices opens before the other.
- the drain valve device of the air dryer and the drain valve device of the oil mist separator can be opened by the air pressure signal output from the pressure regulator of the air dryer. At this time, since one of the drain valve devices discharges the drain liquid prior to the other, the one of the drain valves is opened in advance by drawing the fluid in the flow path for discharging the drain liquid downstream. Even in this case, the drain liquid is easily discharged from the other side.
- the drain liquid discharged from both the oil mist separator and the air dryer can be collected.
- the schematic diagram of a compressed air drying system The front view explaining the connection structure of the oil mist separator and branch pipe which comprise the compressed air drying system.
- the schematic diagram of the compressed air drying system of one modification The schematic diagram of the compressed air drying system of one modification.
- the compressed air drying system will be specifically described as a system mounted on a vehicle.
- the compressed air drying system includes an oil mist separator 11, an air dryer 12, and an oil separator 40 corresponding to a drain storage part.
- the oil mist separator 11 includes an inlet 11b and an outlet 11c.
- the inlet 11 b is connected to a compressed air delivery port of the compressor 15.
- the outlet 11 c is connected to the inlet 12 b of the air dryer 12 via the flow path 13.
- the oil mist separator 11 removes the oil mist from the compressed air and sends the oil mist through the outlet 11c.
- the outlet 12 c of the air dryer 12 is connected to the air tank 16.
- the air dryer 12 delivers compressed dry air through the outlet 12c.
- the air tank 16 temporarily stores the compressed dry air and supplies the compressed dry air to a load such as an air suspension system or a brake system.
- a check valve 14 is provided between the oil mist separator 11 and the air dryer 12.
- the check valve 14 restricts the flow in the opposite direction to the flow of compressed air from the compressor 15 toward the air tank 16. That is, the check valve 14 is closed by a flow in which the compressed air in the air dryer 12 tends to flow backward from the air dryer 12 toward the oil mist separator 11.
- the air dryer 12 has a desiccant for capturing moisture and a filter for capturing oil mist.
- the air dryer 12 removes moisture contained in the compressed air and oil mist as oil remaining in the compressed air.
- the air dryer 12 includes a pressure governor 20 as a pressure regulator that outputs an air pressure signal to the signal supply path 25.
- the pressure governor 20 detects the pressure of the air tank 16 and outputs an air pressure signal when the pressure of the air tank 16 rises to a cutout set value.
- the air dryer 12 includes a check valve 23.
- the check valve 23 is provided at the outlet 12c and is open at the normal time when compressed dry air is sent from the air dryer 12.
- the air dryer 12 is provided with a drain outlet 12a.
- the drain discharge port 12a is connected to the oil separator 40, whereby the pressure of the drain discharge port 12a is atmospheric pressure.
- a drain valve device 22 is provided at the drain outlet 12a.
- the drain valve device 22 is normally closed. When the air pressure upstream of the drain valve device 22 exceeds a predetermined pressure due to the output of the air pressure signal from the pressure governor 20, the drain valve device 22 opens. When the supply of compressed air from the compressor 15 is stopped and the drain valve device 22 is opened, the drain discharge port 12a is opened, and the compressed dry air in the air dryer 12 flows back through the desiccant to cause moisture in the desiccant. Is discharged downstream of the desiccant to regenerate the desiccant. The oil in the filter that captures the oil mist is also discharged downstream of the filter. The drain liquid containing moisture and oil is discharged downstream from the drain discharge port 12a.
- the oil mist separator 11 has a filter as a capturing part, and captures oil mist contained in the compressed air sent from the compressor 15 by allowing the compressed air to pass through the filter.
- the oil mist separator 11 is provided with a drain discharge port 11a.
- the drain discharge port 11a is connected to the oil separator 40, whereby the pressure of the drain discharge port 11a is atmospheric pressure.
- a drain valve device 21 is provided at the drain outlet 11 a of the oil mist separator 11.
- the drain valve device 21 is provided with a pressure signal input port 11e.
- a pressure governor 20 is connected to the pressure signal input port 11e through a signal supply path 25. When the air pressure signal is output from the pressure governor 20, the air pressure signal is input to the pressure signal input port 11 e through the signal supply path 25.
- By inputting an air pressure signal to the pressure signal input port 11 e compressed air is also supplied to the drain valve device 21 of the oil mist separator 11.
- the drain valve device 21 is opened.
- the pressure signal input port 11e and the pipe line connected to the pressure signal input port 11e are schematically illustrated for convenience.
- the drain valve device 21 of the oil mist separator 11 When the drain valve device 21 of the oil mist separator 11 is opened, the compressed air in the oil mist separator 11 flows backward through the filter.
- the compressed air flowing backward through the filter discharges oil captured by the filter downstream of the filter.
- the oil discharged downstream of the filter is discharged as a drain liquid from the drain discharge port 11a.
- the signal supply path 25 is also connected to the compressor 15.
- the compressor 15 shifts from a mode in which the compressed air is continuously supplied to a mode in which the supply of the compressed air is stopped due to idling or the like.
- the oil separator 40 has passed through the filter as a separation unit for capturing oil contained in the compressed air discharged from the oil mist separator 11 and the air dryer 12, a storage unit for storing the drain liquid, and the filter. A discharge port for discharging compressed air to the atmosphere. The compressed air purified through the filter is released to the atmosphere.
- a branch pipe 30 having three ports is connected to the drain outlet 11 a of the oil mist separator 11. Further, one end of the upstream hose 31 is connected to the drain discharge port 12a of the air dryer 12 via an L-shaped connecting pipe 37 serving as an upstream discharge path. The other end of the upstream hose 31 is connected to one port of the branch pipe 30. Furthermore, a common hose 32 as a discharge path is connected to another port of the branch pipe 30. A common hose 32 connects the branch pipe 30 to the oil separator 40. That is, the oil mist separator 11 and the air dryer 12 share a common hose 32.
- the branch pipe 30 and the upstream hose 31 constitute a connecting portion that connects the oil mist separator 11 and the air dryer 12 to a common discharge path.
- the branch pipe 30 has a T-shaped pipe joint 33 and hose connection parts 34 and 35 for connecting the upstream hose 31 and the common hose 32.
- a connecting portion 36 that is directly connected to the drain discharge port 11a is provided between the drain discharge port 11a of the oil mist separator 11 and the pipe joint 33.
- a male screw portion 36 a is formed at the tip of the connecting portion 36.
- the male screw portion 36a is screwed into a female screw portion (not shown) formed inside the drain discharge port 11a, whereby the branch pipe 30 is suspended from the oil mist separator 11.
- the branch pipe 30 includes a first inlet 30 a connected to the oil mist separator 11, a second inlet 30 b connected to the outlet of the upstream hose 31, and an outlet 30 c connected to the inlet of the common hose 32. Have.
- the first inlet 30a connected to the drain outlet 11a of the oil mist separator 11 and the outlet 30c are connected via a linear flow path including a connecting portion 36, a pipe joint 33, and a hose connecting portion 35. Yes. That is, the flow path from the first inlet 30a to the outlet 30c of the branch pipe 30 is linear.
- the second inlet 30b and the outlet 30c connected to the drain outlet 12a of the air dryer 12 are connected via a bent flow path. That is, the flow path from the second inlet 30b to the outlet 30c is bent.
- the drain outlet 11 a of the oil mist separator 11 and the inlet of the oil separator 40 are connected by a flow path including a branch pipe 30 and a common hose 32.
- the drain outlet 12 a of the air dryer 12 and the inlet of the oil separator 40 are connected by a flow path including a connecting pipe 37, an upstream hose 31, a branch pipe 30, and a common hose 32. That is, the flow path length from the oil mist separator 11 to the oil separator 40 is shorter than the flow path length from the air dryer 12 to the oil separator 40. Therefore, the pressure loss when the drain liquid is discharged from the oil mist separator 11 is smaller than that of the air dryer 12.
- the compressed air sent from the compressor 15 flows into the oil mist separator 11 and passes through the filter to capture the oil mist.
- the compressed air sent from the oil mist separator 11 flows into the air dryer 12. As the compressed air passes through the air dryer 12, moisture and oil mist remaining in the compressed air are captured.
- the compressed dry air sent from the air dryer 12 is stored in the air tank 16.
- the unload operation is performed.
- the pressure governor 20 outputs an air pressure signal.
- the drain valve device 21 of the oil mist separator 11 among the drain valve devices 21 and 22 is opened first.
- the drain valve device 21 of the oil mist separator 11 is set lower than the valve opening pressure of the drain valve device 22 of the air dryer 12, the drain valve device 21 of the oil mist separator 11 is made to be a drain valve.
- the valve can be opened before the device 22.
- the valve opening pressures of the drain valve devices 21 and 22 can be adjusted by the biasing force of the springs constituting the drain valve devices 21 and 22.
- the drain valve device 21 When the drain valve device 21 is opened, the compressed air in the oil mist separator 11 flows backward through the filter and discharges oil in the filter downstream of the filter. Oil or the like discharged downstream of the filter is discharged from the drain outlet 11a as a drain liquid. The drain liquid discharged from the drain discharge port 11 a flows into the common hose 32 through the branch pipe 30 and is discharged to the oil separator 40.
- the pressure loss when the drain liquid is discharged from the oil mist separator 11 is reduced as compared with the pressure loss when the air dryer 12 discharges the drain liquid. For this reason, compressed air flows vigorously through the filter, and the oil discharge efficiency from the oil mist separator 11 is increased.
- the drain valve device 22 of the air dryer 12 is opened by the air pressure signal. Then, the check valve 23 built in the air dryer 12 is closed by a flow in which the compressed dry air in the air tank 16 tends to flow backward. As a result, the compressed air in the air dryer 12 flows backward through the desiccant and the filter, and the drain liquid containing moisture is discharged from the drain discharge port 12a. At this time, since the drain liquid has already been discharged from the oil mist separator 11, the fluid is drawn downstream in the branch pipe 30 and the upstream hose 31, and the pressure in the branch pipe 30 and the upstream hose 31 is reduced. . For this reason, the drain liquid is also easily discharged from the air dryer 12.
- the drain liquid discharged from the air dryer 12 passes through the branch pipe 30 via the upstream hose 31 and is collected by the oil separator 40 via the common hose 32.
- the drain liquid collected in the oil separator 40 is separated from air by moisture, oil, and the like by the separation unit.
- the pressure governor 20 stops outputting the air pressure signal.
- the drain valve devices 21 and 22 are closed, and the compressor 15 is operated to shift to the load operation.
- the drain valve device 21 of the oil mist separator 11 with a small purge volume is opened first and the drain liquid is discharged preferentially, the pressure loss when the oil mist separator 11 discharges the drain liquid is reduced. While being able to suppress, the pressure loss at the time of drain liquid discharge
- the oil mist separator 11 and the air dryer 12 share the oil separator 40 and the common hose 32. For this reason, compared with the structure which provides the oil mist separator 11 and the air dryer 12 with the oil separator 40 separately, the space which a compressed air drying system occupies can be reduced. Therefore, the oil separator 40 that collects the drain liquid of the oil mist separator 11 can be provided even if the vehicle has a limited mounting space. Further, by connecting the branch pipe 30 to the drain outlet 11a of the oil mist separator 11, for example, when connecting a hose to the drain outlet 11a of the oil mist separator 11 and connecting the hose and the upstream hose 31 to each other. In comparison, the number of parts can be reduced. Further, since the branch pipe 30 is directly connected to the oil mist separator 11 and is fixed in a state of being suspended from the oil mist separator 11, a structure for fixing the branch pipe 30 to the vehicle body is also unnecessary.
- the oil separator 40 can be easily connected to the oil mist separator 11 already mounted on the vehicle.
- the branch pipe 30 is connected to the oil mist separator 11.
- the upstream hose 31 connected to the air dryer 12 or another hose is connected to the second inlet 30 b of the branch pipe 30 of the oil mist separator 11, and the outlet 30 c of the branch pipe 30 is connected to the oil separator 40 as a common hose 32. Connect with. Therefore, the existing oil separator 40 can be used effectively.
- the drain outlet 11a of the oil mist separator 11 is connected to the oil separator 40 via the branch pipe 30 and the common hose 32, the drain liquid discharged from the oil mist separator 11 can be collected. It becomes. Further, since the oil mist separator 11 and the air dryer 12 share the common hose 32 and the oil separator 40, the space occupied by the compressed air drying system can be reduced.
- the oil mist separator 11 having a small purge volume is used as the drain liquid.
- the pressure loss when discharging the water can be reduced, and the drain liquid can be discharged preferentially.
- the drain valve device 22 of the air dryer 12 is connected to the drain valve device 21 of the oil mist separator 11 via a signal supply path 25. Therefore, each drain valve device 21, 22 can be opened by the air pressure signal output from the pressure governor 20. Further, since the valve opening pressure of the oil mist separator 11 is lower than the valve opening pressure of the air dryer 12, the oil mist separator 11 discharges the drain liquid in advance by the output of the air pressure signal, so that the air dryer 12 also drains. The liquid is easily discharged.
- connection structure between the oil mist separator 11 and the air dryer 12 and the oil separator 40 may be changed. That is, the connection structure includes a connecting pipe 44 and an upstream hose 41 connected to the oil mist separator 11, a connecting pipe 37 and an upstream hose 31 connected to the air dryer 12, a T-shaped branch pipe 42 connecting them, You may comprise from the common hose 43 etc. which are connected to the exit of the branch pipe 30.
- FIG. The branch pipe 42 is fixed to the vehicle body.
- two oil mist separators 11 ⁇ / b> A and 11 ⁇ / b> B may be connected between the compressor 15 and the air tank 16.
- the first inlet 30 a of the branch pipe 30 is connected to the drain outlet 11 a of the oil mist separator 11 closest to the compressor 15.
- the outlet and the oil separator 40 are connected by a common hose 32.
- the second inlet 30b of the branch pipe 30 and the drain outlet 11d of the oil mist separator 11B on the downstream side are connected by a hose 51 and a T-shaped branch pipe 50.
- the branch pipe 50 is fixed to the vehicle body or suspended from the oil mist separator 11B as shown in FIG.
- the outlet of the oil mist separator 11B on the downstream side and the drain outlet 12a of the air dryer 12 are connected by a branch pipe 50 and a hose 52. Since the flow path length to the oil separator 40 is longer in the order of the upstream oil mist separator 11A, the downstream oil mist separator 11B, and the air dryer 12, the pressure loss when the drain liquid is discharged increases in that order. Further, during the unload operation, the drain liquid is discharged in the order of the upstream oil mist separator 11 ⁇ / b> A, the downstream oil mist separator 11 ⁇ / b> B, and the air dryer 12.
- the branch pipe 30 may be connected to the drain discharge port 11d of the oil mist separator 11B or the drain discharge port 12a of the air dryer 12.
- the branch pipe 30 may be provided in the vicinity of the oil separator 40.
- the upstream hose 41 connected to the oil mist separator 11 may be connected to the branch pipe 30 via the connecting pipe 37.
- the upstream hose 31 connected to the air dryer 12 may be connected to the branch pipe 30 via the connecting pipe 37.
- the signal supply path 25 and the like are not shown.
- the air dryer 12 includes a filter that captures oil mist. However, depending on the capture performance of the oil mist separator 11, the filter may be omitted.
- the air dryer 12 is configured to incorporate the check valve 23, but a valve device that closes during the unload operation may be provided on the outlet side of the air dryer 12, and is not limited to the above-described valve device. Further, the check valve 23 built in the air dryer 12 may be provided externally between the outlet of the air dryer 12 and the air tank 16.
- the check valve 14 between the oil mist separator 11 and the air dryer 12 may be built in the oil mist separator 11.
- the check valve 14 is preferably provided in the vicinity of the outlet of the oil mist separator 11.
- the drain valve device 21 of the oil mist separator 11 is configured to be opened by a pneumatic signal from the pressure governor 20 of the air dryer 12, but a dedicated pressure governor may be provided in the oil mist separator 11.
- the drain valve device 21 of the oil mist separator 11 is configured to open before the drain valve device 22 of the air dryer 12, but the drain valve device 22 of the air dryer 12 may be opened in advance.
- the branch pipe 30 is connected to the drain discharge port 12 a of the air dryer 12, and the upstream hose 31 is connected to the drain discharge port 11 a of the oil mist separator 11.
- the oil separator 40 that separates the compressed air and the drain liquid is used as the drain storage portion.
- the drain separator may have other configurations as long as the drain liquid can be stored without being discharged onto the road surface. Also good.
- a tank that does not include a filter and that simply stores drain liquid discharged from the common hose 32 may be used.
- the drain connecting port 12a of the air dryer 12, the drain discharging port 11a of the oil mist separator 11, and the connecting portion for connecting the common hose 32 are configured from the upstream hose 31 and the branch pipe 30, but the same Other members may be used as long as the flow path structure can be configured. For example, you may use what the branch pipe 30 was shape
- the drain outlet 11 a of the oil mist separator 11 and the inlet of the oil separator 40 may be connected by a hose 60. Further, the drain discharge port 12 a of the air dryer 12 and another inlet of the oil separator 40 may be connected via a hose 61 different from the hose 60 connected to the oil mist separator 11. Even in this aspect, not only the air dryer 12 but also the drain liquid discharged from the oil mist separator 11 can be collected by the oil separator 40.
- the oil mist separator is provided with a filter that captures the oil mist.
- the oil mist may be separated by subjecting the compressed air to processing such as centrifugation and heat exchange.
- the branch pipe 30 or the upstream hose 41 is connected to the drain discharge port which discharges
- the compressed air supply system may be a system mounted on another moving body having an engine such as a ship or an aircraft.
Abstract
Description
上記課題を解決する圧縮空気乾燥システムは、コンプレッサから送出される圧縮空気に含まれる油分及び水分を除去するための圧縮空気乾燥システムにおいて、乾燥剤と、当該乾燥剤の再生によって生じるドレン液を排出するためのドレン排出口とを有するエアドライヤと、圧縮空気にオイルミストとして含まれる油分を捕捉するための捕捉部と、捕捉した油分を含むドレン液を排出するためのドレン排出口とを有し、前記コンプレッサと前記エアドライヤとの間の流路に設けられるオイルミストセパレータと、前記エアドライヤから排出されたドレン液、及び前記オイルミストセパレータから排出されたドレン液を貯留するためのドレン貯留部と、を備え、前記エアドライヤのドレン排出口及び前記オイルミストセパレータのドレン排出口は前記ドレン貯留部に接続される。
上記構成によれば、オイルミストセパレータの排出口に接続される接続部の第1の入口と出口とは直線状の流路によって接続されるので、パージボリュームの少ないオイルミストセパレータがドレン液を排出するときの圧力損失を小さくし、ドレン液を優先的に排出させることができる。
図1に示すように、圧縮空気乾燥システムは、オイルミストセパレータ11、エアドライヤ12、及びドレン貯留部に相当するオイルセパレータ40を備えている。オイルミストセパレータ11は、入口11bと出口11cとを備える。入口11bは、コンプレッサ15の圧縮空気の送出口に接続されている。また、出口11cは、流路13を介してエアドライヤ12の入口12bに接続されている。オイルミストセパレータ11は、圧縮空気からオイルミストを除去し、このオイルミストを、出口11cを介して送出する。さらに、エアドライヤ12の出口12cは、エアタンク16に接続されている。エアドライヤ12は、出口12cを介して圧縮乾燥空気を送出する。エアタンク16は、圧縮乾燥空気を一時貯留し、エアサスペンションシステムやブレーキシステム等の負荷に圧縮乾燥空気を供給する。
(1)オイルミストセパレータ11のドレン排出口11aは、分岐管30及び共通ホース32を介してオイルセパレータ40に接続されるので、オイルミストセパレータ11から排出されるドレン液を捕集することが可能となる。また、オイルミストセパレータ11及びエアドライヤ12は、共通ホース32及びオイルセパレータ40を共有しているので、圧縮空気乾燥システムが占有するスペースを縮小することができる。
なお、上記各実施の形態は、以下のような形態をもって実施することもできる。
・図3に示すように、オイルミストセパレータ11及びエアドライヤ12と、オイルセパレータ40との接続構造を変更してもよい。即ち、接続構造は、オイルミストセパレータ11に接続される連結管44及び上流側ホース41、エアドライヤ12に接続される連結管37及び上流側ホース31、それらを接続するT字状の分岐管42、分岐管30の出口に接続される共通ホース43等から構成されてもよい。分岐管42は、車体に固定される。当該構成は、上記実施形態に比べ、部品点数が多いものの、オイルミストセパレータ11のドレン排出口11aの下方のスペースが限られる場合には、当該構成の方がスペースについて有利な場合もある。
Claims (6)
- コンプレッサから送出される圧縮空気に含まれる油分及び水分を除去するための圧縮空気乾燥システムにおいて、
乾燥剤と、当該乾燥剤の再生によって生じるドレン液を排出するためのドレン排出口とを有するエアドライヤと、
圧縮空気にオイルミストとして含まれる油分を捕捉するための捕捉部と、捕捉した油分を含むドレン液を排出するためのドレン排出口とを有し、前記コンプレッサと前記エアドライヤとの間の流路に設けられるオイルミストセパレータと、
前記エアドライヤから排出されたドレン液、及び前記オイルミストセパレータから排出されたドレン液を貯留するためのドレン貯留部と、を備え、
前記エアドライヤのドレン排出口及び前記オイルミストセパレータのドレン排出口が前記ドレン貯留部に接続される、
圧縮空気乾燥システム。 - 前記エアドライヤから排出されたドレン液、及び前記オイルミストセパレータから排出されたドレン液を前記ドレン貯留部に排出するための排出路と、
前記エアドライヤのドレン排出口及び前記オイルミストセパレータのドレン排出口を前記排出路に接続する接続部と、をさらに備える
請求項1に記載の圧縮空気乾燥システム。 - 前記エアドライヤのドレン排出口には、当該エアドライヤから排出されたドレン液を下流に排出するための上流側排出路が接続され、
前記接続部は、前記オイルミストセパレータの排出口に接続される第1の入口と、前記上流側排出路に接続される第2の入口と、前記排出路に接続される出口と、を有する
請求項2に記載の圧縮空気乾燥システム。 - 前記接続部の前記第1の入口及び前記出口は、直線状の流路によって接続される
請求項3に記載の圧縮空気乾燥システム。 - 前記オイルミストセパレータは、前記エアドライヤ及び前記コンプレッサの間に複数設けられ、前記コンプレッサに最も近いオイルミストセパレータのドレン排出口に前記接続部の前記第1の入口が接続される
請求項3又は4に記載の圧縮空気乾燥システム。 - 前記エアドライヤは、空気圧信号を供給路に出力する調圧器と、当該空気圧信号によって開くドレンバルブ装置とを備え、
前記オイルミストセパレータは、前記調圧器から出力された空気圧信号によって開くドレンバルブ装置を備え、
前記エアドライヤのドレンバルブ装置は、前記オイルミストセパレータのドレンバルブ装置に前記供給路を介して接続されており、
前記オイルミストセパレータのドレンバルブ装置及び前記エアドライヤのドレンバルブ装置のいずれか一方が他方に先行して開弁する
請求項1~5のいずれか1項に記載の圧縮空気乾燥システム。
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