CN115817443A - Main air supply unit for four-marshalling intercity motor train unit braking system - Google Patents
Main air supply unit for four-marshalling intercity motor train unit braking system Download PDFInfo
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- CN115817443A CN115817443A CN202211614356.5A CN202211614356A CN115817443A CN 115817443 A CN115817443 A CN 115817443A CN 202211614356 A CN202211614356 A CN 202211614356A CN 115817443 A CN115817443 A CN 115817443A
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- 230000006835 compression Effects 0.000 claims abstract description 44
- 238000007906 compression Methods 0.000 claims abstract description 44
- 239000010687 lubricating oil Substances 0.000 claims abstract description 25
- 238000012544 monitoring process Methods 0.000 claims abstract description 22
- 238000001816 cooling Methods 0.000 claims abstract description 20
- 238000000926 separation method Methods 0.000 claims abstract description 20
- 238000012805 post-processing Methods 0.000 claims abstract description 10
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 5
- 238000001914 filtration Methods 0.000 claims description 14
- 238000011045 prefiltration Methods 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 239000000428 dust Substances 0.000 claims description 10
- 238000009833 condensation Methods 0.000 claims description 9
- 230000005494 condensation Effects 0.000 claims description 9
- 238000001035 drying Methods 0.000 claims description 8
- 238000012360 testing method Methods 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 6
- 239000010935 stainless steel Substances 0.000 claims description 5
- 229910001220 stainless steel Inorganic materials 0.000 claims description 5
- 239000006096 absorbing agent Substances 0.000 claims description 4
- 238000007605 air drying Methods 0.000 claims description 4
- 238000013461 design Methods 0.000 claims description 4
- 229910000975 Carbon steel Inorganic materials 0.000 claims description 3
- 238000004887 air purification Methods 0.000 claims description 3
- 239000010962 carbon steel Substances 0.000 claims description 3
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- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 239000002274 desiccant Substances 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 3
- 238000003745 diagnosis Methods 0.000 claims description 3
- 239000002808 molecular sieve Substances 0.000 claims description 3
- 238000006116 polymerization reaction Methods 0.000 claims description 3
- 230000008929 regeneration Effects 0.000 claims description 3
- 238000011069 regeneration method Methods 0.000 claims description 3
- 230000035939 shock Effects 0.000 claims description 3
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims description 3
- 238000001179 sorption measurement Methods 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 10
- 230000001012 protector Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000002265 prevention Effects 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 3
- 239000010865 sewage Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
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- 239000002699 waste material Substances 0.000 description 1
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Classifications
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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
-
- 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
- B60T17/02—Arrangements of pumps or compressors, or control devices therefor
-
- 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
- B60T17/18—Safety devices; Monitoring
- B60T17/22—Devices for monitoring or checking brake systems; Signal devices
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T30/00—Transportation of goods or passengers via railways, e.g. energy recovery or reducing air resistance
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
- Drying Of Gases (AREA)
- Compressor (AREA)
Abstract
The invention discloses a main air supply unit for a four-marshalling intercity motor train unit braking system, which comprises an air compression system, an air post-processing system and an electric control system, wherein the air compression system, the air post-processing system and the electric control system are integrated through a hanger and hung on a beam at the bottom of a train; the oil-gas separation system adopts a cast-aluminum oil-gas separation cylinder and a built-in oil core separation structure; the driving system adopts a direct connection mode of a compression host and a motor through a coupler; the oil filter adopts an external form; the cooling system adopts a centrifugal fan and a finned cooler for forced air cooling, and an oil way bypass mode is carried out through a temperature control valve; the initial pressure in the oil and gas cylinder is established through the MPV valve, and the pressure relief function is realized through the on-off of a two-position two-way electromagnetic valve; the monitoring system comprises machine head pressure monitoring and lubricating oil temperature monitoring. The invention realizes the depth autonomy of the braking system, improves the noise index, realizes the light weight requirement and improves the maintenance space.
Description
Technical Field
The invention relates to the field of wind source devices of a braking system of a motor train unit, in particular to a main wind supply unit for a four-marshalling intercity motor train unit braking system.
Background
The existing intercity motor train unit comprises vehicle types such as 160 kilometer 4 groups, 200 kilometer 4 groups, 160 kilometer 8 groups and 200 kilometer 8 groups. The 4-group vehicle type and the 8-group vehicle type need to select main air supply units with different air displacement due to different air utilization requirements. At present, the existing four-marshalling intercity motor train unit uses a main air supply unit as a whole machine import device, and the following problems and limitations mainly exist, key components of the main air supply unit, such as a machine head, a motor, a dryer and the like, are designed and manufactured abroad and are not easy to control; the equipment is heavy, which is not beneficial to the light weight of the whole vehicle; the occupied space is large, especially in the width direction, the space waste is easy to cause, and the overhaul space is compressed; the noise is big, influences passenger's comfort level.
Therefore, it is necessary to provide a technical solution for autonomous main air supply unit, which solves the above problems.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides the main air supply unit for the braking system of the four-marshalling intercity motor train unit, which realizes the deep autonomy of the braking system, improves the noise index, realizes the light weight requirement and improves the maintenance space.
The purpose of the invention is realized by the following technical scheme.
A main air supply unit for a four-marshalling inter-city motor train unit braking system comprises an air compression system, an air post-processing system and an electrical control system, wherein the air compression system, the air post-processing system and the electrical control system are integrated through a hanger and hung on a beam at the bottom of a train, and the air compression system adopts a screw type air compressor; the air inlet system adopts the combination form of an air inlet filter, an air inlet hose and an air inlet valve; the oil-gas separation system adopts a cast-aluminum oil-gas separation cylinder and a built-in oil core separation structure; the driving system adopts a direct connection mode of a compression host and a motor through a coupler; the oil filter adopts an external form; the cooling system adopts a centrifugal fan and a finned cooler for forced air cooling, and an oil way bypass mode is carried out through a temperature control valve; the initial pressure in the oil and gas cylinder is established through the MPV valve, and the pressure relief function is realized through the on-off of a two-position two-way electromagnetic valve; the monitoring system comprises machine head pressure monitoring and lubricating oil temperature monitoring.
The air post-treatment system comprises a pre-filter, a double-tower dryer and an outlet filter, wherein the pre-filter comprises an air-water separator and a condensation filter, the pre-filter is used for realizing dust removal and oil removal of compressed air, the double-tower dryer adopts a non-thermal regeneration and pressure swing adsorption type mode, and a molecular sieve is used as a drying agent; a control circuit board is arranged in the double-tower dryer to realize double-tower switching sequence control and fault diagnosis.
Air enters the compression main machine from the air inlet system, and the compression main machine and the motor are directly driven by the plum blossom elastic coupling to compress the air; an independent oil-gas separation system is arranged, and an external lubricating oil filter is adopted; a forced air cooling system is adopted, and oil way bypass design is carried out through a temperature control valve; the volute, the middle bracket, the compression main machine and the motor are fastened through bolts; a three-point hanging structure is adopted and is connected with the hanging bracket through a shock absorber.
The secondary oil return subassembly, the secondary oil return subassembly includes filter, throttle bolt and check valve, filter, throttle bolt integration are inside the oil content lid, the filter entry sets up in oil content core rear end, and filter export and throttle bolt entry linkage, throttle bolt export and check valve entry linkage, the check valve export is connected with the compression host computer.
The unloading assembly comprises a throttle bolt and a two-position two-way unloading electromagnetic valve, wherein the air inlet of the throttle bolt is arranged at the front end of the MPV valve and the rear end of the oil core, the air outlet of the throttle bolt is connected with the air inlet of the electromagnetic valve, and the air outlet of the electromagnetic valve is arranged at the air inlet of the exhaust branch of the air inlet valve; after the air engine is stopped, compressed air in the oil cylinder is filtered by the oil core and then is exhausted to the atmosphere by the electromagnetic valve, the air inlet valve exhaust branch, the air inlet hose and the air inlet filter.
The centrifugal fan adopts a forward-inclined structure; the volute adopts a shallow volute tongue molded line; the air guide ring is stamped by a stainless steel plate, and the diffuser is welded by a carbon steel plate; the cooler 37 is of an oil-air cooling integrated structure.
The air compressor includes:
an air compression circuit: air enters a compression main machine for compression C through an air inlet filter AF, an air inlet hose and an air inlet valve IV, and compressed air enters an oil cylinder; when the pressure in the oil cylinder reaches the opening pressure value of the overflow valve MPV1, the valve plate is opened, and compressed air is discharged through the cooler AC air cooling channel;
compressed air unloading circuit: the pressure in the compression main engine and the oil gas cylinder enters an air inlet valve discharge branch through a throttle bolt RO1 and an electromagnetic valve SV1, and is filtered by an air inlet hose and an air inlet filter and then discharged to the atmosphere; the unloading rate is controlled by the aperture size of the throttle bolt;
air compressor overvoltage protection circuit: a safety valve SF1 is arranged for carrying out compression host and oil cylinder overvoltage protection, and a test joint TP1 is arranged for carrying out pressure detection.
The compressed air purification system includes:
compressed air primary filtration system: removing water from the cooled compressed air by a cyclone type gas-water separator OF, and filtering oil and dust in the compressed air by a condensation filter CF;
compressed air drying system: drying the compressed air by adopting a double-tower dryer;
compressed air secondary filter system: and (3) adopting a condensation type outlet filter DF to filter trace oil and dust in the compressed air again.
An oil circuit, comprising:
a main oil return loop: compressed air enters an oil cylinder in an oil-gas mixture mode, the oil cylinder serves as an oil storage cylinder, and oil circuit circulation is carried out by utilizing a pressure difference principle; when the temperature of the lubricating oil is lower than the opening temperature value of the temperature control valve, the lubricating oil enters a compressor head after being filtered by the oil filter; when the temperature of the lubricating oil is higher than the opening temperature value of the temperature control valve, the lubricating oil enters the oil cooler through the bypass branch of the temperature control valve to be cooled, and then enters the head of the compressor after being filtered by the oil filter;
a secondary oil return loop: oil-gas mixture discharged from a screw head tangentially enters an oil cylinder, coarse filtration of oil is realized through collision and centrifugal rotational flow, and fine filtration is realized through the actions of interception, polymerization and the like of an oil content core; the lubricating oil filtered out by the oil core is collected at the bottom of the oil core and enters the screw machine head through the filter, the throttling bolt and the one-way valve by utilizing the principle of pressure difference.
Compared with the prior art, the invention has the advantages that: the invention realizes the complete autonomy of the main air supply unit for the braking system of the four-marshalling intercity motor train unit;
compared with the existing main air supply unit, the noise index is improved, and the sound pressure level at 1 m is less than or equal to 74dB (A);
compared with the existing air supply unit of the vehicle owner, the weight of the vehicle is reduced by 30kg, and the light weight requirement is realized.
Compared with the existing air supply unit of the vehicle owner, the width of the air supply unit is reduced by about 300mm, and the maintenance space is improved.
Drawings
Fig. 1 is a schematic structural view of a main air supply unit for a four-marshalling intercity motor train unit braking system according to an embodiment of the invention.
Fig. 2 is a schematic structural view of the air compressor.
FIG. 3 is a schematic diagram of a structure of an oil-gas separation system.
Fig. 4 is a schematic view of the cooling system.
FIG. 5 is a schematic view of a pre-filter configuration.
FIG. 6 is a schematic diagram of a double-tower dryer.
Fig. 7 is a schematic structural diagram of an electrical control system.
Fig. 8 is a schematic diagram of the gas path.
In the figure: 1, an outlet overflow valve; 2 an air compressor; 3, an oil temperature switch; 4, a gas path transmission module; 5 an outlet filter; 6 an electrical control system; 7, a hanging bracket; 8, a double-tower dryer; 9 a pre-filter; 10 a rubber damper; 11, an anti-drop steel wire rope; 12 compressing the host; 13 a backpressure prevention pressure switch; 14 an air intake filter; 15 an air inlet hose; 16 a volute; 17 a middle bracket; 18 motor; 19 a vacuum indicator; 20 an intake valve; 21 testing the first connector; 22MPV valves; 23 a safety valve; 24 a lube oil filter; 25 temperature control valves; 26 a one-way valve; 27 an unloading solenoid valve; 28 oil content cover; 29 oil core; 30, coarse filter cartridge; 31 an oil gas cylinder; 32 oil-viewing glasses; 33, a wind guide ring; 34 a centrifugal fan; 35 a volute; a 36 diffuser; a 37-fin cooler; 38 a protective net; 39 maintaining the cover plate of the port 1; maintaining 40 a port 2 cover plate; 41 a gas-water separator; 42 a coalescing filter; 43 a blowdown electromagnetic valve; 44 a heater; 45, connecting blocks; 46 a drying tower; 47 gas circuit board; 48 a humidity indicator; 49 a pressure indicator; 50 heater power supply interface; 51, an electric controller; 52 double tower monitoring pressure switch; 53 double tower power supply interface; 54 testing the second connector; 55 a pre-control valve; 56 a diverter valve; 57 an electric cabinet body; 58 a power cord connector; 59 control line connector; 60, preventing tripping; 61 air switch 2A;62 air switch 8A;63 a time delay relay; a 64-time relay; 65 terminal row; 66 thermal relay protectors; 67 direct current intermediate relay; 68 an alternating current intermediate relay; 69 an alternating current contactor; 70 a counter; 71 a timer; 72 electric cabinet cover;
an AF intake air filter; an IV air inlet valve; a PS1 backpressure prevention pressure switch; c, compressing the host; an M motor; TP1/TP2/TP3 test joint; the RO1/RO2 throttle bolt; SV1 unloading electromagnetic valve; an MPV1 compressed air outlet overflow valve; an AC cooler; OF gas-water separator; a CF coalescing filter; SV2/SV3 blowdown electromagnetic valve; a MU muffler; SV4/SV5 switching electromagnetic valve; a DT1/DT2 drying tower; a PV pre-control valve; a PS2/PS3 double-tower monitoring pressure switch; a CV1/CV2 check valve; a DF outlet filter; an EC cock; MPV2 total wind outlet overflow valve.
Detailed Description
The invention is described in detail below with reference to the drawings and specific examples.
Referring to fig. 1, the main air supply unit for the braking system of the four-marshalling intercity motor train unit comprises an air compression system, an air post-processing system, an electrical control system 6, an outlet overflow valve 1 and the like, and is integrated through a hanger 7 and hung on a beam at the bottom of a train. The air compression system comprises an air compressor 2 and a lubricating oil temperature switch 3; the air post-processing system comprises a pre-filter 9, a double-tower dryer 8 and an outlet filter 5, and all air passages and oil passages are connected by stainless steel hard pipes. The air compression system adopts a screw type air compressor; the air inlet system adopts the combination form of an air inlet filter, an air inlet hose and an air inlet valve; the oil-gas separation system is independently arranged and adopts a cast-aluminum oil-gas separation cylinder and a built-in oil core separation structure; the driving system adopts a direct connection mode of a compression host and a motor through a coupler; the oil filter adopts an external form; the cooling system adopts a centrifugal fan and a finned cooler for forced air cooling, and an oil way bypass mode is carried out through a temperature control valve; the initial pressure in the oil and gas cylinder is established through the MPV valve, and the pressure relief function is realized through the on-off of a two-position two-way electromagnetic valve; the secondary oil return function is realized through a one-way valve and a filter; the monitoring system comprises machine head pressure monitoring and lubricating oil temperature monitoring.
The air-source air-conditioner comprises an air path transmission module 4 for transmitting compressed air to enter an aftertreatment system, a rubber vibration absorber 10 for isolating vibration of the air compressor 2 and a steel wire rope 11 for preventing secondary falling of the air compressor 2.
Referring to fig. 2, in the air compressor of the main air supply unit, air enters the compression main machine 12 from the air inlet assembly, and the compression main machine 12 and the motor 18 are directly driven by the quincuncial elastic coupling to compress the air; an independent oil-gas separation system is arranged, and an external lubricating oil filter 24 is adopted; a forced air cooling system is adopted, and an oil way bypass design is carried out through a temperature control 25 valve; the volute 16, the middle bracket 17, the compression main machine 12 and the motor 18 are fastened through bolts; and a three-point hanging structure is adopted and is connected with the hanging bracket 7 through a shock absorber 10.
The air intake system includes an intake filter 14, an intake hose 15, a vacuum indicator 19, and an intake valve 20;
the secondary return assembly includes a filter, a choke plug and a check valve 26. Wherein the filter and the throttle bolt are integrated inside the oil cover. The filter entry sets up in oil content core rear end, and filter export and throttle bolt entry linkage, throttle bolt export and check valve entry linkage are connected with the compression host computer to the check valve export.
The unloading assembly comprises a throttle bolt and a two-position two-way unloading electromagnetic valve 27, wherein an air inlet of the throttle bolt is arranged at the front end of the MPV valve 22 and the rear end of the oil core, an air outlet of the throttle bolt is connected with an air inlet of the electromagnetic valve 27, and an air outlet of the electromagnetic valve 27 is arranged at an air inlet of an exhaust branch of the air inlet valve 20. After the air engine is stopped, the compressed air in the oil cylinder is filtered by the oil core and then is exhausted to the atmosphere through the electromagnetic valve 27, the air exhaust branch of the air inlet valve 20, the air inlet hose 15 and the air inlet filter 14. The exhaust rate is regulated by the orifice diameter of the throttle plug.
The gas path inlet of the pressure switch 13 is arranged at the lower end of the valve plate of the gas inlet valve 20. For monitoring the pressure inside the compressor main unit 12 and preventing the air compressor from being started with load. The electrical interface is connected to the main air supply unit start-stop self-checking control loop.
The oil temperature switch temperature detector is arranged at the exhaust end of the compression host and used for monitoring the temperature of lubricating oil. The electric interface is connected to the main air supply unit start-stop self-checking control loop and the high-temperature feedback loop.
Referring to fig. 3, the oil-gas separation system includes a coarse separation cylinder 29, an internal oil core 30, an oil storage barrel 31, and an oil separation cover 28, and oil level and oil quality observation is performed through an oil sight glass 32. The coarse separating cylinder, the oil storage barrel and the oil separating cover are all formed by cast aluminum.
Referring to fig. 4, the cooling system employs a centrifugal fan 34 and a finned cooler 37. The centrifugal fan 34 adopts a forward-inclined structure; the volute 35 adopts a shallow volute tongue molded line, and the molded line design adopts an approximate drawing method of an Archimedes spiral line-an equal-elementary method; the air guide ring 33 is stamped by a stainless steel plate, and the diffuser 36 is welded by a carbon steel plate. The cooler 37 adopts an oil cooling-air cooling integrated structure, and a protective net 38 is added for protection. The reserved maintenance port is convenient for cleaning a later-period cooling system.
Referring to fig. 1, the air post-treatment system of the main air supply unit of the invention is composed of a pre-filter 9, a double-tower dryer 8, an outlet filter 5 and an outlet overflow valve 1.
Referring to fig. 5, the pre-filter of the main air supply unit of the present invention is composed of a gas-water separator 41 and a coalescing filter 42, and realizes dust removal and oil removal of compressed air. The sewage outlets of the gas-water separator 41 and the condensation filter 42 are respectively provided with a two-position two-way electromagnetic valve 43. The pollution discharge control of the filter is realized by the on-off of the electromagnetic valve 43. The heater 44 is arranged at the valve body of the electromagnetic valve, so that the valve body is heated in a low-temperature environment, and the normal work of the action part of the valve body of the electromagnetic valve is ensured. The two solenoid valves 43 discharge sewage and are converged through a connecting block 45 to meet the requirement of an equipment compartment interface.
Referring to fig. 6, the double-tower dryer of the main air supply unit of the present invention adopts the principle of heatless regeneration and pressure swing adsorption, and comprises a drying tower 46, an integrated gas circuit board 47, a reversing valve 56 and an electric controller 51.
The invention relates to a drying tower of a double-tower dryer of a main air supply unit, which comprises a molecular sieve drying agent and a stainless steel filter ring.
The invention relates to a double-tower dryer integrated air circuit board of a main air supply unit, which integrates a pre-control valve 55, a pressure indicator 49, a pressure switch 52 and a color-changing silica gel humidity indicator 48. The normal switching of the piston assembly inside the reversing valve 56 is realized through the pre-control valve 55, and the working state of the drying tower is monitored through the pressure switch 52.
The reversing valve of the double-tower dryer of the main air supply unit comprises a switching electromagnetic valve, a piston assembly, a temperature controller, a heating rod and a sewage discharging silencer.
According to the electric controller of the double-tower dryer of the main air supply unit, the control circuit board is arranged in the electric controller to realize the working state control and the fault diagnosis of the double-tower dryer.
The main air supply unit dust removal filter comprises a filter and a manual cock, and timed pollution discharge is performed through the manual cock.
Referring to fig. 7, the main air supply unit electrical control system of the present invention includes electrical components such as an ac contactor 69, a thermal relay protector 66, an ac intermediate relay 68, a dc intermediate relay 67, a delay relay 63, a time relay 64, an air switch 2a61, an air switch 2a62, a timer 71, and a counter 70. And all the electric elements are integrated in the electric cabinet, so that the requirement of protection level is met.
Referring to fig. 8, the air path principle of the main air supply unit for the braking system of the four-marshalling intercity motor train unit comprises an air compression principle and a compressed air purification principle.
The air compressor structure of the main air supply unit comprises:
an air compression circuit: air enters the compression main machine for compression C through the air inlet filter AF, the air inlet hose and the air inlet valve IV, and compressed air enters the oil cylinder. And when the pressure in the oil cylinder reaches the opening pressure value of the overflow valve MPV1, the valve plate is opened, and the compressed air is discharged through the AC air cooling channel of the cooler.
Compressed air unloading circuit: the pressure in the compression main engine and the oil gas cylinder enters the air inlet valve discharge branch through a throttle bolt RO1 and an electromagnetic valve SV1, and is discharged to the atmosphere after being filtered by an air inlet hose and an air inlet filter. The unloading rate is controlled by the size of the aperture of the throttle bolt.
Air compressor overvoltage protection circuit: a safety valve SF1 is arranged for carrying out compression host and oil cylinder overvoltage protection, and a test joint TP1 is arranged for carrying out pressure detection.
The post-treatment system of the main air supply unit consists of primary compressed air filtration, double-tower drying and secondary filtration.
Compressed air primary filtration system: the cooled compressed air is dewatered by a cyclone type gas-water separator OF, and then oil and dust in the compressed air are filtered by a condensation filter CF.
Compressed air drying system: a two-tower dryer was used for compressed air drying.
Compressed air secondary filtration system: and adopting a condensation type outlet filter DF to filter trace oil and dust in the compressed air again.
The invention relates to a main air supply unit oil circuit principle for a four-marshalling intercity motor train unit braking system.
A main oil return loop: compressed air enters the oil cylinder in the form of oil-gas mixture, the oil cylinder serves as an oil storage cylinder, and oil circuit circulation is carried out by utilizing a pressure difference principle. When the temperature of the lubricating oil is lower than the opening temperature value of the temperature control valve, the lubricating oil enters the compressor head after being filtered by the oil filter. When the temperature of the lubricating oil is higher than the opening temperature value of the temperature control valve, the lubricating oil enters the oil cooler through the bypass branch of the temperature control valve to be cooled and then enters the compressor head after being filtered by the oil filter.
A secondary oil return loop: the oil-gas mixture discharged from the screw head tangentially enters an oil cylinder, coarse filtration of oil is realized through collision and centrifugal rotational flow, and fine filtration is realized through the actions of interception, polymerization and the like of an oil content core. The lubricating oil filtered out by the oil core is collected at the bottom of the oil core and enters the screw machine head through the filter, the throttling bolt and the one-way valve by utilizing the principle of pressure difference.
The invention relates to an electrical control method of a main air supply unit for a four-marshalling intercity motor train unit braking system, which comprises an interlocking control function, a power supply function, a start-stop control function, an available self-checking function, a self-protection function and a signal feedback function.
According to the interlocking control of the main air supply unit electric control method, the voltage of the main circuit is monitored through the alternating current intermediate relay, so that the alternating current contactor coil in the auxiliary circuit is controlled to lose power, and the interlocking control of the main circuit and the auxiliary circuit is realized.
The power supply function of the main air supply unit electric control method comprises a connector, a circuit breaker, an alternating current intermediate relay, an alternating current contactor and a thermal relay protector. And the auxiliary reverse power supply to the motor of the air compressor is realized. The vehicle power supply supplies power to the control circuit through the control line connector and the circuit breaker. The power supply input of the compressor power supply loop is cut off through the breaker, so that the isolation of the air supply device and the short-circuit protection function are realized. The power line connector is used for connecting the auxiliary reverse direction of the vehicle with the power supply line of the air supply device. Three-phase electricity monitoring in the main circuit is realized through an alternating current intermediate relay, and the three-phase electricity monitoring is used as an initial condition for triggering the auxiliary circuit. The alternating current function is controlled by the direct current through the alternating current contactor. The main contact of the contactor is used for controlling the alternating current loop to lose power, and the auxiliary contact is used for controlling the loop and signal feedback. Generally, the auxiliary contact of the contactor is disposed at the front end of the contact of the auxiliary electrical component such as the electrical component of the post-processing device and the timer counter. The overload protection of the motor is realized through the thermal relay protector.
The power supply function start-stop control function of the main air supply unit electric control method provided by the invention is realized by the following steps of: and after the total wind pressure measured by the pressure sensor is reduced to a set value, the network/EBCU controls the air compressor to start. The button is arranged in the cab, so that the function of forcibly starting and stopping the air compressor is realized. The function of automatically starting and stopping the air compressor is realized through the hard-line control of the pressure switch.
The main air supply unit electric control method can use the self-checking function, and the starting self-checking is carried out through the monitoring of the temperature switch and the backpressure prevention pressure switch and the signal output.
The self-protection function of the main air supply unit electric control method provided by the invention is provided with the temperature switch, so that the function of cutting off the air compressor when the temperature is too high is realized. The back pressure prevention pressure switch and the quick unloading channel are arranged, so that the air compressor is prevented from being started when the load is too high. The normally open unloading electromagnetic valve and the blow-down electromagnetic valve are arranged, so that the pressure in the oil gas cylinder and the pressure in the air post-processing pipeline are unloaded under the condition of failure or sudden power failure of the air compressor, and the dangerous conditions such as machine on-load starting or personnel on-load operation are avoided.
The signal feedback function of the main air supply unit electrical control method realizes the monitoring and feedback of the starting and stopping states of the air compressor through the alternating current contactor. Temperature monitoring and high-temperature alarm feedback are realized through a temperature switch. And the overload monitoring and feedback of the motor are realized through the thermal relay protector. And the working state feedback of the double-tower dryer is realized through a pressure switch signal.
The electrical control method of the main air supply unit further comprises the step of controlling the electromagnetic valve pollution discharge time through a time relay. The running time of the air compressor is recorded in a mode of connecting a timer and a counter in series by the aid of a contactor. The low-temperature heating of parts such as a blowdown electromagnetic valve, a reversing valve and the like is realized through a temperature controller.
Claims (9)
1. A main air supply unit for a four-marshalling intercity motor train unit braking system is characterized by comprising an air compression system, an air post-processing system and an electrical control system, wherein the air compression system, the air post-processing system and the electrical control system are integrated through a hanger and hung on a beam at the bottom of a train, and the air compression system adopts a screw type air compressor; the air inlet system adopts the combination form of an air inlet filter, an air inlet hose and an air inlet valve; the oil-gas separation system adopts a cast-aluminum oil-gas separation cylinder and a built-in oil core separation structure;
the driving system adopts a direct connection mode of a compression host and a motor through a coupler; the oil filter adopts an external form; the cooling system adopts a centrifugal fan and a finned cooler for forced air cooling, and an oil way bypass mode is carried out through a temperature control valve; the initial pressure in the oil and gas cylinder is established through the MPV valve, and the pressure relief function is realized through the on-off of a two-position two-way electromagnetic valve; the monitoring system comprises machine head pressure monitoring and lubricating oil temperature monitoring.
2. The main air supply unit for the braking system of the four-marshalling inter-city motor train unit as claimed in claim 1, wherein the air post-treatment system comprises a pre-filter, a two-tower dryer and an outlet filter, the pre-filter comprises a gas-water separator and a condensation filter, the pre-filter is used for realizing dust and oil removal of compressed air, the two-tower dryer adopts a non-thermal regeneration and pressure swing adsorption type form, and a molecular sieve is used as a drying agent; a control circuit board is arranged in the double-tower dryer to realize double-tower switching sequence control and fault diagnosis.
3. The main air supply unit for the braking system of the four-marshalling inter-city motor train unit according to claim 1, wherein air enters the compression main machine from an air inlet system, and the compression main machine and the motor are directly driven by a quincuncial elastic coupling to compress the air; an independent oil-gas separation system is arranged, and an external lubricating oil filter is adopted; a forced air cooling system is adopted, and oil way bypass design is carried out through a temperature control valve; the volute, the middle bracket, the compression main machine and the motor are fastened through bolts; a three-point hanging structure is adopted and is connected with the hanging bracket through a shock absorber.
4. The main air supply unit for the four-consist inter-city motor train unit braking system according to claim 1, characterized by comprising a secondary oil return assembly, wherein the secondary oil return assembly comprises a filter, a throttle bolt and a one-way valve, the filter and the throttle bolt are integrated inside an oil separation cover, the inlet of the filter is arranged at the rear end of an oil core, the outlet of the filter is connected with the inlet of the throttle bolt, the outlet of the throttle bolt is connected with the inlet of the one-way valve, and the outlet of the one-way valve is connected with a compression main machine.
5. The main air supply unit for the braking system of the four-marshalling inter-city motor train unit according to claim 1, which is characterized by comprising an unloading assembly, wherein the unloading assembly comprises a throttle bolt and a two-position two-way unloading electromagnetic valve, an air inlet of the throttle bolt is arranged at the front end of an MPV valve and the rear end of an oil core, an air outlet of the throttle bolt is connected with an air inlet of the electromagnetic valve, and an air outlet of the electromagnetic valve is arranged at an air inlet of an air inlet valve exhaust branch; after the air engine is stopped, compressed air in the oil cylinder is filtered by the oil core and then is exhausted to the atmosphere by the electromagnetic valve, the air inlet valve exhaust branch, the air inlet hose and the air inlet filter.
6. The main air supply unit for the braking system of the four-marshalling inter-city motor train unit according to claim 1, wherein the centrifugal fan is of a forward-inclined structure; the volute adopts a shallow volute tongue molded line; the air guide ring is stamped by a stainless steel plate, and the diffuser is welded by a carbon steel plate; the cooler 37 is of an oil-air cooling integrated structure.
7. The main air supply unit for the braking system of the four-consist inter-city motor train unit according to claim 1, wherein the air compressor comprises:
an air compression circuit: air enters a compression main machine for compression C through an air inlet filter AF, an air inlet hose and an air inlet valve IV, and compressed air enters an oil cylinder; when the pressure in the oil cylinder reaches the opening pressure value of the overflow valve MPV1, the valve plate is opened, and compressed air is discharged through the cooler AC air cooling channel;
an air unloading loop: the pressure in the compression main engine and the oil gas cylinder enters an air inlet valve discharge branch through a throttle bolt RO1 and an electromagnetic valve SV1, and is filtered by an air inlet hose and an air inlet filter and then discharged to the atmosphere; the unloading rate is controlled by the aperture size of the throttle bolt;
an overvoltage protection circuit: a safety valve SF1 is arranged for carrying out compression host and oil cylinder overvoltage protection, and a test joint TP1 is arranged for carrying out pressure detection.
8. The main air supply unit for the braking system of the four-marshalling inter-city motor train unit as claimed in claim 1, wherein the compressed air purification system comprises:
compressed air primary filtration system: removing water from the cooled compressed air by a cyclone type gas-water separator OF, and filtering oil and dust in the compressed air by a condensation filter CF;
compressed air drying system: drying the compressed air by adopting a double-tower dryer;
compressed air secondary filter system: and adopting a condensation type outlet filter DF to filter trace oil and dust in the compressed air again.
9. The main air supply unit for the braking system of the four-marshalling intercity motor train unit as claimed in claim 1, wherein the oil circuit comprises:
a main oil return loop: compressed air enters an oil cylinder in an oil-gas mixture mode, the oil cylinder serves as an oil storage cylinder, and oil circuit circulation is carried out by utilizing a pressure difference principle; when the temperature of the lubricating oil is lower than the opening temperature value of the temperature control valve, the lubricating oil enters a compressor head after being filtered by an oil filter; when the temperature of the lubricating oil is higher than the opening temperature value of the temperature control valve, the lubricating oil enters the oil cooler through the bypass branch of the temperature control valve to be cooled, and then enters the head of the compressor after being filtered by the oil filter;
a secondary oil return loop: oil-gas mixture discharged from a screw head tangentially enters an oil cylinder, coarse filtration of oil is realized through collision and centrifugal rotational flow, and fine filtration is realized through the actions of interception, polymerization and the like of an oil content core; the lubricating oil filtered out by the oil core is collected at the bottom of the oil core and enters the screw machine head through the filter, the throttling bolt and the one-way valve by utilizing the principle of pressure difference.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211614356.5A CN115817443A (en) | 2022-12-15 | 2022-12-15 | Main air supply unit for four-marshalling intercity motor train unit braking system |
| PCT/CN2023/121038 WO2024125030A1 (en) | 2022-12-15 | 2023-09-25 | Main air supply unit for four-car intercity crh train braking system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211614356.5A CN115817443A (en) | 2022-12-15 | 2022-12-15 | Main air supply unit for four-marshalling intercity motor train unit braking system |
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| Publication Number | Publication Date |
|---|---|
| CN115817443A true CN115817443A (en) | 2023-03-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211614356.5A Pending CN115817443A (en) | 2022-12-15 | 2022-12-15 | Main air supply unit for four-marshalling intercity motor train unit braking system |
Country Status (2)
| Country | Link |
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| CN (1) | CN115817443A (en) |
| WO (1) | WO2024125030A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024125030A1 (en) * | 2022-12-15 | 2024-06-20 | 南京中车浦镇海泰制动设备有限公司 | Main air supply unit for four-car intercity crh train braking system |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4109177A1 (en) * | 1991-03-20 | 1992-09-24 | Knorr Bremse Ag | COMPRESSED AIR SUPPLY DEVICE FOR COMPRESSED AIR SYSTEMS OF VEHICLES |
| DE102004051435B3 (en) * | 2004-10-20 | 2006-06-22 | Siemens Ag | System for producing of dry compressed air, especially for rail vehicles, has air drier connected after cooler, whereby moisture falls out as condensate which is used for cooling of cooler by evaporation |
| DE102014115991A1 (en) * | 2014-11-03 | 2016-05-04 | Knorr-Bremse Systeme für Schienenfahrzeuge GmbH | Self-regulating network for the optimized air supply of rail vehicles |
| CN206409384U (en) * | 2016-11-15 | 2017-08-15 | 合肥通用机械研究院 | A kind of vehicle screw air compressor |
| CN107618497A (en) * | 2017-08-31 | 2018-01-23 | 瑞立集团瑞安汽车零部件有限公司 | A kind of oil-free air supply system |
| CN110816583B (en) * | 2019-11-15 | 2021-01-15 | 南京中车浦镇海泰制动设备有限公司 | Variable-frequency air supply device for rail transit vehicle |
| CN115817443A (en) * | 2022-12-15 | 2023-03-21 | 南京中车浦镇海泰制动设备有限公司 | Main air supply unit for four-marshalling intercity motor train unit braking system |
-
2022
- 2022-12-15 CN CN202211614356.5A patent/CN115817443A/en active Pending
-
2023
- 2023-09-25 WO PCT/CN2023/121038 patent/WO2024125030A1/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024125030A1 (en) * | 2022-12-15 | 2024-06-20 | 南京中车浦镇海泰制动设备有限公司 | Main air supply unit for four-car intercity crh train braking system |
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| Publication number | Publication date |
|---|---|
| WO2024125030A1 (en) | 2024-06-20 |
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