CN105501247A - Braking system for freight train - Google Patents
Braking system for freight train Download PDFInfo
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- CN105501247A CN105501247A CN201610019048.6A CN201610019048A CN105501247A CN 105501247 A CN105501247 A CN 105501247A CN 201610019048 A CN201610019048 A CN 201610019048A CN 105501247 A CN105501247 A CN 105501247A
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- control cock
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- brake
- braking
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61H—BRAKES OR OTHER RETARDING DEVICES SPECIALLY ADAPTED FOR RAIL VEHICLES; ARRANGEMENT OR DISPOSITION THEREOF IN RAIL VEHICLES
- B61H11/00—Applications or arrangements of braking or retarding apparatus not otherwise provided for; Combinations of apparatus of different kinds or types
- B61H11/06—Applications or arrangements of braking or retarding apparatus not otherwise provided for; Combinations of apparatus of different kinds or types of hydrostatic, hydrodynamic, or aerodynamic brakes
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Abstract
The invention relates to a braking system for a freight train. The braking system comprises a main braking pipeline composed of a train pipe, a distribution valve (5), an auxiliary air cylinder (3), a braking cylinder (6) and an accelerating relief air cylinder (4). The braking cylinder (6) is connected with a braking shoe and used for generating main braking torque on wheels. The distribution valve (5) is connected with an auxiliary braking pipeline. The auxiliary braking pipeline comprises an empty and heavy vehicle control valve assembly (7), a relay valve (8), a gas-liquid converting and pressure increasing valve (10), an oil tank (12) and a hydraulic damper (11) which are sequentially connected. The hydraulic damper (11) is used for generating braking torque on an axle. The relay valve (8) is connected with an air supply cylinder (6) for providing pressure air. The empty and heavy vehicle control valve assembly (7) is connected with the distribution valve (5). Compared with the prior art, the braking system can meet the braking requirements of different load conditions of the freight train, and has the advantages of being low in pressure air loss, small in abrasion loss of the braking shoe, small in wheel tread abrasion and the like.
Description
Technical field
The present invention relates to a kind of brake system, especially relate to a kind of brake system for goods train.
Background technology
One of existing goods train control for brake core difficult problem is exactly sky, loaded vehicle braking ratio differs too large, is difficult to the whole braking force of train of Balance route (square), can causes the excessive locking wheel of empty wagons braking force, cause wheel flat.Present application train empty and load brake equipment basic structure theory is: the design of train braking system braking ratio take loaded vehicle as standard, the pressure air that diverse location triggers empty and load brake equipment, discharge unit enters brake cylinder when empty, loaded vehicle state by empty wagons truck bolster, to reach the object reducing empty wagons braking force.Because bogie primary shock-damping structure with empty and load change and inaccuracy is sensitive, comformability is poor, arranges the loss of brake-cylinder pressure air also comparatively greatly for organizing into groups the freight train of growing up, when can not ensure empty wagons, braking procedure wheel does not abrade completely.
Because during braking, the excessive and friction temperature of brake cylinder application force raises, the abrasion of aggravation brake shoe and the problem that causes wheel tread to inlay also more serious, the extreme influence cost control of train operating safety and operation maintenance.Present stage is the load carrying vehicle low cost cost keeping enormous quantity, and most roller bearing adapter stabilizer bar still adopts this relatively easy structure type all over the world, and train brake control system and foundation brake rigging do not do comprehensive change yet.So in the urgent need to working out, existing brake system does not make large improvement, and the brake system of the different braking requirement under the unloaded and heavily loaded two kinds of mode of operations of goods train can be met.
Summary of the invention
Object of the present invention is exactly provide a kind of brake system for goods train to overcome defect that above-mentioned existing empty and load adjustment braking force technology exists.
Object of the present invention can be achieved through the following technical solutions:
A kind of brake system for goods train, comprise by train pipe, distributing valve, auxiliary reservoir, accelerate the main brake pipeline alleviating reservoir and brake cylinder composition, described distributing valve also connects train pipe, described brake cylinder connects brake block, and for producing main brake moment to wheel, described distributing valve also connects auxiliary braking pipeline, this auxiliary braking pipeline comprises the confession reservoir connected successively, relay valve, gas-liquid convertor turbocharge valve, fuel tank and hydraulic retarder, for during loaded vehicle, auxiliary brake torque is produced to axletree, described relay valve also connects empty and load control cock assembly, this empty and load control cock assembly is also connected with distributing valve.
Described supplies reservoir auxiliary connection reservoir, is also provided with check valve at auxiliary reservoir with between reservoir;
When train braking is alleviated, by distributing valve effect, the pressure air of train pipe be filled with auxiliary reservoir and supply in reservoir, check valve is used for preventing pressure air from flowing backwards;
At goods train when braking, pressure air in auxiliary reservoir exports through distributing valve, point making two parts enters brake cylinder and empty and load control cock assembly respectively, and the bare weight that empty and load control cock assembly accepts the bogie truck of goods train carries status signal, has following two kinds of damped conditions:
When goods train is unloaded, empty and load control cock assembly is closed, thus relay valve is closed, and for the pipeline between reservoir and gas-liquid convertor turbocharge valve, now, goods train only drives brake block to act on wheel tread apply brake by brake cylinder;
During goods train heavy duty, empty and load control cock assembly is opened, empty and load control cock assembly is opened, transmission distributing valve distributes the pressure air signal of coming to relay valve and controls relay valve and open, make after relay valve Flow amplification, to enter gas-liquid convertor turbocharge valve for the pressure air in reservoir, work fluid in pressurized fuel tank, and make working oil hydraulic pressure enter in hydraulic retarder, now, the main brake moment that goods train is produced by brake cylinder promotion brake block acting wheel tread and the auxiliary brake torque that hydraulic retarder provides are braked jointly, to increase lock torque during train heavy duty.
Described empty and load control cock assembly comprises support, empty and load control cock, slide bar and suppression dish, described slide bar is fixedly installed on suppression dish, described Bracket setting is on slide bar, and moved along slide bar by the load-bearing pressure signal accepting goods train, described empty and load control cock is arranged on support, and the two ends of empty and load control cock connect relay valve and brake cylinder respectively.
Described empty and load control cock comprises the control cock valve body of connection bracket, epitrochoidal chamber is provided with in this control cock valve body, the control cock piston along its movement is provided with in epitrochoidal chamber, and epitrochoidal chamber is divided into the work epicoele and the work cavity of resorption being connected relay valve that connect brake cylinder, described control cock piston is provided with sandwich valve, in described work cavity of resorption, also movable setting stretches out work cavity of resorption and the feeler lever be fixedly connected with the valve gap of body base, the top contact sandwich valve of this feeler lever;
When goods train heavy duty, empty and load control cock moves down along slide bar with support, and contact inhibition dish, now, feeler lever is fixed with valve gap, control cock piston is subject to the pressure air that brake cylinder passes over to be continued to move down, and makes feeler lever back down sandwich valve on control cock piston, thus empty and load control cock is opened and connects relay valve and brake cylinder;
When goods train is unloaded, empty and load control cock resets to slide bar midway location with support, now, control cock piston is subject in the process that pressure air that brake cylinder passes over moves down, feeler lever moves down simultaneously, and sandwich valve cuts out, thus empty and load control cock is closed and cuts off relay valve and brake cylinder.
The sandwich valve spring making it reset to close also is provided with between described sandwich valve and control cock valve interior wall;
The pressure spring for regulable control valve piston movement pressure is also provided with between described control cock piston and control cock valve interior wall;
Described feeler lever and and control cock valve interior wall between be also provided with the second retracing spring for making feeler lever reset, this first return spring assembly is made up of two retracing springs at connection bracket and slide bar two ends respectively.
Described slide bar is also provided with the first return spring assembly for relaxing vehicle vibration disturbance.
Described relay valve comprises relay valve valve body, this relay valve valve body is provided with lamina membranacea piston chamber successively, exhaust air box, medial compartment and air supplying chamber, lamina membranacea piston is provided with in described lamina membranacea piston chamber, empty and load control cock is connected by pipeline in the side of lamina membranacea piston, the exhaust valve of opposite side by piston rod successively connection control exhaust air box switch and the confession air-valve of control air supplying chamber switch, described exhaust air box is also provided with exhausr port, described medial compartment connects gas-liquid convertor turbocharge valve, described air supplying chamber connects for reservoir, described medial compartment is also connected to piston rod side by shrinkage cavity with lamina membranacea piston chamber and is connected.
Described hydraulic retarder and fuel tank are also provided with radiating gill.
Described radiating gill is cellular, and adopts wind-cooling heat dissipating pattern to dispel the heat.
Distributing valve in the present invention can adopt 120 type air slide valves etc.
The present invention by routine be applicable under light condition by train pipe, distributing valve, auxiliary reservoir, the basis of the main brake unit of acceleration alleviation reservoir and brake cylinder composition arranges pressure charged auxiliary braking unit, pressure charged auxiliary braking unit provides additional braking force by without abrasion hydraulic retarder, and realize running or stopping by the compound action of empty and load control cock and relay valve, empty and load control cock assembly accepts the delivery situation of goods train, when unloaded or load carrying ability are not enough to open empty and load control cock assembly, train braking drives brake block to wheel tread apply brake by brake cylinder, when train heavy duty, empty and load control cock assembly is opened, and the pressure air in brake cylinder pipeline to carry out in relay valve and opens relay valve, makes to connect for reservoir and gas-liquid convertor turbocharge valve, work fluid supercharging is also sent in hydraulic retarder, thus carries out auxiliary braking to train rotating shaft.
Compared with prior art, the present invention has the following advantages:
(1) of the present invention is on the basis for train zero load braking, set up extra nothing abrasion hydraulic retarder provide additional braking force, with existing heavily loaded braking force is first set, reduces the mode of braking force for unloaded train braking by blowdown presssure air again, the loss of the pressure air of brake mode of the present invention is little, and the wearing and tearing of the brake block of the braking of hydraulic retarder when can greatly reduce braking, extend the service life of brake block, thus decrease the operation and maintenance cost of vehicle.
(2) displacement of empty and load control cock of the present invention with the difference of the load carrying ability of train on slide bar vertical direction is not identical yet, when trainload reaches certain threshold values, empty and load control cock is under the effect of the pressure air of brake cylinder, empty and load control cock two ends can be made to connect, thus act on relay valve, and hydraulic retarder working line is run, and then countershaft carries out braking.
(3) during braking, the present invention connects bare weight respectively by relay valve and carries control cock and gas-liquid convertor turbocharge valve, cleverly the pressure air carrying control cock from bare weight is sent for the pressure air in reservoir into gas-liquid convertor turbocharge valve as control presssure signal, the hydraulic oil promoted in fuel tank enters hydraulic retarder, produces non-abrasion braking effect.
(4) the present invention is not changing under the original air brake control system condition of goods train, bare weight is adopted to carry control cock, utilize the distributing valve of original Pneumatic brake systems, in control brake shoe friction braking simultaneously, also pressure air signal is provided to produce brake action to control hydraulic retarder, improve the deceleration and stopping performance of freight train, under at utmost reducing costs, achieve the possibility of application.
(5) the present invention also arranges check valve by pipeline between auxiliary reservoir and relay valve and supplies reservoir, thus make to become independently to the device of gas-liquid convertor turbocharge valve air feed between one and auxiliary reservoir for reservoir, thus do not affect the air feed of auxiliary reservoir to brake cylinder pipeline.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the structural representation of relay valve of the present invention;
Fig. 3 is the structural representation that bare weight of the present invention carries control cock assembly;
Fig. 4 is workflow diagram of the present invention;
Fig. 5 is hydraulic retarder of the present invention mounting structure schematic diagram ON TRAINS;
In figure, 1-train pipe, 2-arm, 3-auxiliary reservoir, 4-accelerates to alleviate reservoir, 5-distributing valve, 6-brake cylinder, 7-empty and load control cock, 8-relay valve, 9-is for reservoir, 10-gas-liquid convertor turbocharge valve, 11-hydraulic retarder, 12-fuel tank, 13-radiating gill, 14-switch valve, 15-check valve, 16-tee connection, 71-support, 72-first return spring assembly, 73-suppression dish, 74-control cock valve body, 75-valve gap, 76-feeler lever, 77-relay valve coupling end, 78-second retracing spring, 79-pressure spring, 710-control cock piston, 711-sandwich valve, 712-brake cylinder coupling end, 713-sandwich valve spring, 81-lamina membranacea piston, 82-exhausr port, 83-exhaust valve, 84-is for air-valve, 85-lamina membranacea piston chamber, 86-exhaust air box, 87-shrinkage cavity, 88-medial compartment, 89-piston rod, 810-air supplying chamber.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Embodiment 1
A kind of brake system for goods train, as shown in Figure 1, comprise by train pipe 1, auxiliary reservoir 3, distributing valve 5, accelerate the main brake pipeline alleviating reservoir 4 and brake cylinder 6 composition, brake cylinder 6 connects freight car foundation brake rigging device and brake block by pull bar lever, and for producing main brake moment to wheel, brake system also comprises the auxiliary braking pipeline be connected with distributing valve 5, this auxiliary braking pipeline comprises the empty and load control cock assembly 7 connected successively, relay valve 8, gas-liquid convertor turbocharge valve 10, fuel tank 12 and hydraulic retarder 11, relay valve 8 also connects the confession reservoir 9 providing pressure air, connecting tee adaptor union 16 gone back by empty and load control cock assembly 7, the another two ends of tee connection 16 connect brake cylinder 6 and distributing valve 5 respectively, also be connected with auxiliary reservoir 3 for reservoir 9, switch valve 14 and check valve 15 is also provided with successively at auxiliary reservoir 3 and between reservoir 9,
Empty and load control cock assembly 7, as shown in Figure 3, comprise support 71, empty and load control cock, slide bar and suppression dish 73, slide bar is fixedly installed on suppression dish 73, support 71 is arranged on slide bar, and moved along slide bar by the load-bearing pressure signal accepting goods train, slide bar is also provided with the first return spring assembly 72 for relaxing vehicle vibration disturbance, first return spring assembly 72 is made up of two retracing springs at connection bracket 71 and slide bar two ends respectively, empty and load control cock is arranged on support 71, the two ends of empty and load control cock connect relay valve 8 and brake cylinder 6 respectively, empty and load control cock comprises the control cock valve body 74 of connection bracket 71, epitrochoidal chamber is provided with in this control cock valve body 74, the control cock piston 710 along its movement is provided with in epitrochoidal chamber, and epitrochoidal chamber is divided into the work epicoele connecting brake cylinder 6 by brake cylinder coupling end 712 is connected relay valve 8 work cavity of resorption with by relay valve coupling end 77, the pressure spring 79 for regulable control valve piston 710 movement pressure is also provided with between control cock piston 710 and control cock valve body 74 inwall, control cock piston 710 is also provided with sandwich valve 711, the sandwich valve spring 713 making it reset to close also is provided with between sandwich valve 711 and control cock valve body 74 inwall, in work cavity of resorption, also movable setting stretches out work cavity of resorption and the feeler lever 76 be fixedly connected with the valve gap 75 of body base, the top contact sandwich valve 711 of this feeler lever 76, feeler lever 76 and and control cock valve body 74 inwall between be also provided with the second retracing spring 78 for making feeler lever 76 reset.
Relay valve 8, as shown in Figure 2, comprise relay valve 8 valve body, this relay valve 8 valve body is provided with lamina membranacea piston chamber 85 successively, exhaust air box 86, medial compartment 88 and air supplying chamber 810, lamina membranacea piston 81 is provided with in lamina membranacea piston chamber 85, empty and load control cock is connected by pipeline in the side of lamina membranacea piston 81, the exhaust valve 83 of opposite side by piston rod 89 successively connection control exhaust air box 86 switch and the confession air-valve 84 of control air supplying chamber 810 switch, exhaust air box 86 is also provided with exhausr port 82, medial compartment 88 connects gas-liquid convertor turbocharge valve 10, air supplying chamber 810 connects for reservoir 9, medial compartment 88 is also connected to piston rod 89 side by shrinkage cavity 87 with lamina membranacea piston chamber 85 and is connected.
Hydraulic retarder 11 and fuel tank 12 are also provided with radiating gill 13, and radiating gill 13 in cellular, and adopts wind-cooling heat dissipating pattern to dispel the heat.
When train braking is alleviated, acted on by distributing valve 5, the pressure air of train pipe is filled with auxiliary reservoir 3 in reservoir 9, check valve 15 flows backwards for preventing pressure air;
At goods train when braking, pressure air in auxiliary reservoir 3 exports through distributing valve 5, point making two parts enters brake cylinder 6 and empty and load control cock assembly 7 respectively, and the bare weight that empty and load control cock assembly 7 accepts the bogie truck of goods train carries status signal, has following two kinds of damped conditions:
When goods train is unloaded, empty and load control cock resets to slide bar midway location with support 71, control cock piston 710 is subject in the process that pressure air that brake cylinder 6 passes over moves down, feeler lever 76 moves down simultaneously, sandwich valve 711 cuts out, thus empty and load control cock is closed and cuts off auxiliary braking pipeline, now, goods train only drives brake block to act on wheel tread apply brake by brake cylinder 6;
When goods train heavy duty, empty and load control cock moves down along slide bar with support 71, and contact inhibition dish 73, now, feeler lever 76 is fixed with valve gap 75, control cock piston 710 is subject to the pressure air that brake cylinder 6 passes over to be continued to move down, and make feeler lever 76 back down sandwich valve 711 on control cock piston 710, thus empty and load control cock is opened and connects relay valve 8 and brake cylinder 6, pressure air enters in relay valve 8 from empty and load control cock assembly 7, transmission pressure air signal is to relay valve 8 and relay valve 8 is opened, control the airline entering gas-liquid convertor turbocharge valve 10 for the pressure air in reservoir 9 after relay valve 8 Flow amplification, air pressure supercharging is converted to oil liquid pressure, the working oil hydraulic pressure in fuel tank 12 after supercharging is made to enter in hydraulic retarder 11, now, goods train promotes by brake cylinder 6 main brake moment that brake block acting wheel tread produces and the auxiliary brake torque that provides of hydraulic retarder 11 is braked jointly, to increase lock torque during train heavy duty.
The principle of work of relay valve 8 of the present invention is specific as follows: during braking, shunting the pressure air of coming by empty and load control cock enters on the left of lamina membranacea piston chamber 85, promote lamina membranacea piston 81 to move to right, piston rod 89 backs down for air-valve 84, high pressure air for reservoir 9 enters gas-liquid convertor turbocharge valve 10 through supplying air-valve 84 mouthfuls, and is entered on the right side of lamina membranacea piston 81 by shrinkage cavity 87.Along with the increase of gas-liquid convertor turbocharge valve 10 pressure, pressure on the right side of the lamina membranacea piston chamber 85 be communicated with it synchronously increases, and the pressure difference of lamina membranacea piston 81 both sides constantly reduces, and promotes lamina membranacea piston 81 and gets back to original midway location gradually, for air-valve 84 mouthfuls closedown, stop supercharging for reservoir 9.In the case, brake cylinder 6 pressure and gas-liquid convertor turbocharge valve 10 pressure realize synchronous equivalence increases.If gas-liquid convertor turbocharge valve 10 slightly reduces pressure because of leakage, then lamina membranacea piston 81 will move to right slightly under the promotion of both sides pressure difference, make to open some wind for air-valve 84 mouthfuls, slightly mend some wind, until gas-liquid convertor turbocharge valve 10 air chamber recovers original pressure can to gas-liquid convertor turbocharge valve 10 for reservoir 9.When brake cylinder 6 alleviates air draft decompression, lamina membranacea piston 81 will move to left, and pull open exhaust valve 83, and now, the high pressure air of gas-liquid convertor turbocharge valve 10 air chamber is discharged into air through exhaust valve 83, exhausr port 82.Along with the reduction of gas-liquid convertor turbocharge valve 10 air chamber pressure, lamina membranacea piston 81 also will get back to middle pressurize position gradually, closes exhausr port 82, makes air pressure convertor turbocharge valve air chamber stop decompression.Now, gas-liquid convertor turbocharge valve 10 air chamber, if any leakage, can mend wind to it too for reservoir 9, makes it recover original pressure.
The principle of work that bare weight of the present invention carries control cock is specific as follows: when train is unloaded or do not have heavy duty (do not reach and back down the connection threshold values that bare weight carries control cock), support 71 remains on settling position under the effect of the first return spring assembly 72, now, suppression dish 73 and feeler lever 76 keep certain distance, train pipe 1 pressure m, the pressure air of auxiliary reservoir 3 is inflated to brake cylinder 6 through distributing valve 5, along with the increase of brake cylinder 6 pressure air, promote control cock piston 710 to move down, and with sandwich valve spring 713, second retracing spring 78, the combined action of pressure spring 79 grade, be with movable feeler lever 76 to move down simultaneously, now sandwich valve 711 keeps closed condition, hydraulic retarder 11 cannot work because pipeline cuts off,
When train heavy duty (reach and back down the connection threshold values that bare weight carries control cock), bare weight carries control cock and moves down with support 71, after feeler lever 76 contacts with suppression dish 73, feeler lever 76 keeps height and position constant, now, when train pipe 1 pressure m, the pressure air of auxiliary reservoir 3 is inflated to brake cylinder 6 through distributing valve 5, along with the increase of brake cylinder 6 pressure air, control cock piston 710 moves down under the effect of brake cylinder 6 pressure air, compress the second retracing spring 78 and pressure spring 79, now under the effect of pressure air, feeler lever 76 backs down the sandwich valve 711 in control cock piston 710, the valve port of pressure air through opening of being come in by brake cylinder 6 transmission of work epicoele flows to relay valve 8, control the auxiliary braking cell operation of composition such as hydraulic retarder 11 grade.After the effect of control cock piston 710 two-way pressure reaches balance, valve port is automatically again closed by the sandwich valve 711 in control cock piston 710 under the effect of sandwich valve spring 713, and the air pressure maintaining brake cylinder 6 and gas-liquid convertor turbocharge valve 10 is constant.When train pipe 1 inflates alleviation, the pressure air of brake cylinder 6 through distributing valve 5 discharged to air, pressure air in work cavity of resorption backs down sandwich valve 711, and relay valve 8 opens gas-liquid convertor turbocharge valve 10 and the path of air thereupon, realizes the excision of pressure charged loaded vehicle setting device.
When brake system of the present invention is used for goods train braking, concrete control process is as shown in Figure 4, known:
In step 401, brake system carries out initialization, and brake cylinder 6 and confession reservoir 9 are inflated, each valve reset, and each reservoir carries out just inflation, and empty and load brake equipment is in idle position, then enters step 402.
In step 402, braking instruction sends.Driver's cab assigns braking instruction, engine brake valve air draft, and train pipe 1 reduces pressure, and speed-slackening signal conducts to distributing valve by brake-pressure ripple.
When driver control automatic brake valve makes brake pipe implement service braking decompression, distributing valve 5 action, auxiliary reservoir 3 to the inflation of brake cylinder pipeline, performs brake cylinder-brake shoe friction braking by distributing valve 5.Brake cylinder 6 is pressed close to wheel by mechanical lever structure drive brake shoe and is carried out friction braking.Brake cylinder 6 pressure air enters empty and load control cock by its gas circuit branch road simultaneously.
In brake cylinder 6 air pressure elevation process, perform step 406 simultaneously, carry out the judgement of empty and load operating mode.If be judged to be empty wagons, then directly perform step 411, the deboost phase terminates, and enters brake cylinder 6 packing stage, and brake cylinder 6 pressure remains unchanged.If be judged to be loaded vehicle, then empty and load control cock is opened, and is communicated with relay valve 8 and brake cylinder 6.
After gas circuit connects, perform step 407, when brake cylinder 6 air pressure rises, pressure air enters on the left of lamina membranacea piston chamber 85 by empty and load control cock, promotes relay valve 8 lamina membranacea piston 81, performs step 408.
In a step 408, when brake cylinder 6 pressure increase, lamina membranacea piston 81 moves to right, and piston rod 89 backs down for air-valve 84, then enters step 409.
In step 409, along with the unlatching for air-valve 84, the high pressure air for reservoir 9 enters gas-liquid convertor turbocharge valve 10 through supplying air-valve 84 mouthfuls, and is entered on the right side of lamina membranacea piston 81 by shrinkage cavity 87.Along with the increase of gas-liquid convertor turbocharge valve 10 pressure, lamina membranacea piston 81 both sides pressure difference reduces gradually, gets back to original midway location gradually, for air-valve 84 mouthfuls closedown, stops supercharging for reservoir 9.Along with high pressure air constantly enters gas-liquid convertor turbocharge valve 10, perform step 410.
In step 410, high pressure gas enter the large side air chamber of gas-liquid convertor turbocharge valve 10 sectional area, promote pressure charging valve spool, the high pressure fuel tank 12 of pressure charging valve spool opposite side being obtained meet hydraulic retarder 11 deceleration and stopping performance and require.Along with the movement of pressure charging valve spool, the working medium in the pushed at high pressure fuel tank 12 that spool brings is to hydraulic retarder 11 fuel feeding, and hydraulic retarder 11 internal filled liquid rate constantly increases, and lock torque constantly increases, and progressively enters braking mode.
In step 411, the air pressure of brake cylinder 6 reaches maximum, and hydraulic retarder 11 internal filled liquid rate is close to 100%, and now the overall braking force of train reaches maximum, enters next step packing stage of train.
After driver's cab sends pressurize instruction, brake cylinder 6 air pressure remains unchanged, pressure signal is constant, lamina membranacea piston 81 gets back to state of equilibrium, cut off for gas circuit between reservoir 9 and gas-liquid convertor turbocharge valve 10, remain unchanged, without abrasion hydraulic retarder 11 continuous braking without abrasion hydraulic retarder 11 internal work hydraulic pressure oil mass.
After driver's cab sends alleviation instruction, train pipe 1 air pressure rises, distributing valve 5 acts on lower brake cylinder 6 and is vented, the left side air pressure of the lamina membranacea piston chamber 85 be connected with its gas circuit is caused to reduce, lamina membranacea piston 81 moves to left, disconnect the gas circuit for reservoir 9, the pressure air that gas-liquid conversion increases valve leads to air by exhausr port 82, gas-liquid convertor turbocharge valve 10 spool resets due to difference of pressure, fuel tank 12 working oil hydraulic coupling reduces, and the fluid in hydrodynamic retarder is back to fuel tank 12 under the double action of centnifugal force and gravity.
Hydraulic retarder 11 mounting means is on a freight train as shown in Figure 5:
Freight train bogie truck is provided with 4 hydraulic retarders 11, the hydraulic retarder 11 that on each axletree of bogie truck, each installation 2 blade lean directions are contrary, 4 hydraulic retarders 11 form rectangular-shaped being arranged symmetrically with, the blade lean direction of two hydraulic retarders 11 on rectangular-shaped diagonal line is identical, ensure quality and the braking equilibrium of forces of bogie truck both sides, the stator of hydraulic retarder 11 is connected with freight train truck bolster by hinged pull bar with shell, make the stator of hydraulic retarder 11 freight train bogie truck relative to shell position stability, and adapt to bolster vibration.Be connected a fuel tank 12 with two hydraulic retarders 11 on the straight line that axletree is vertical by oil pipe, fuel tank 12 is arranged on below freight train truck bolster.
Above-mentioned is can understand and use invention for ease of those skilled in the art to the description of embodiment.Person skilled in the art obviously easily can make various amendment to these embodiments, and General Principle described herein is applied in other embodiments and need not through performing creative labour.Therefore, the invention is not restricted to above-described embodiment, those skilled in the art, according to announcement of the present invention, do not depart from improvement that scope makes and amendment all should within protection scope of the present invention.
Claims (9)
1. the brake system for goods train, comprise by train pipe, distributing valve (5), auxiliary reservoir (3), the main brake pipeline that acceleration alleviation reservoir (4) and brake cylinder (6) form, described brake cylinder (6) connects brake block, and for producing main brake moment to wheel, it is characterized in that, described distributing valve (5) also connects auxiliary braking pipeline, this auxiliary braking pipeline comprises the empty and load control cock assembly (7) connected successively, relay valve (8), gas-liquid convertor turbocharge valve (10), fuel tank (12) and hydraulic retarder (11), this hydraulic retarder (11) is for producing auxiliary brake torque to axletree, described relay valve (8) also connects confession reservoir (6) providing pressure air, described empty and load control cock assembly (7) is also connected with distributing valve (5).
2. a kind of brake system for goods train according to claim 1, it is characterized in that, described confession reservoir (9) auxiliary connection reservoir (3), is also provided with check valve (15) between auxiliary reservoir (3) and confession reservoir (9);
When train braking is alleviated, acted on by distributing valve (5), the pressure air of train pipe be filled with auxiliary reservoir (3) and supply in reservoir (9), check valve (15) flows backwards for preventing pressure air;
At goods train when braking, pressure air in auxiliary reservoir (3) exports through distributing valve (5), point making two parts enters brake cylinder (6) and empty and load control cock assembly (7) respectively, the bare weight that empty and load control cock assembly (7) accepts the bogie truck of goods train carries status signal, has following two kinds of damped conditions:
When goods train is unloaded, empty and load control cock assembly (7) is closed, thus relay valve (8) is closed, for the pipeline between reservoir (9) and gas-liquid convertor turbocharge valve (10), now, goods train only drives brake block to act on wheel tread apply brake by brake cylinder (6);
During goods train heavy duty, empty and load control cock assembly (7) is opened, transmission distributing valve (5) distributes the pressure air signal of coming to relay valve (8) and controls relay valve (8) and open, make after relay valve (8) Flow amplification, to enter gas-liquid convertor turbocharge valve (10) for the pressure air in reservoir (9), work fluid in pressurized fuel tank (12), and make working oil hydraulic pressure enter in hydraulic retarder (11), now, the main brake moment that goods train is produced by brake cylinder (6) promotion brake block acting wheel tread and the auxiliary brake torque that hydraulic retarder (11) provides are braked jointly, to increase lock torque during train heavy duty.
3. a kind of brake system for goods train according to claim 1, it is characterized in that, described empty and load control cock assembly (7) comprises support (71), empty and load control cock (7), slide bar and suppression dish (73), described slide bar is fixedly installed on suppression dish (73), described support (71) is arranged on slide bar, and moved along slide bar by the load-bearing pressure signal accepting goods train, described empty and load control cock (7) is arranged on support (71), the two ends of empty and load control cock (7) connect relay valve (8) and brake cylinder (6) respectively.
4. a kind of brake system for goods train according to claim 3, it is characterized in that, described empty and load control cock (7) comprises the control cock valve body (74) of connection bracket (71), epitrochoidal chamber is provided with in this control cock valve body (74), the control cock piston (710) along its movement is provided with in epitrochoidal chamber, and epitrochoidal chamber is divided into the work epicoele and the work cavity of resorption being connected relay valve (8) that connect brake cylinder (6), described control cock piston (710) is provided with sandwich valve (711), in described work cavity of resorption, also movable setting stretches out work cavity of resorption and the feeler lever (76) be fixedly connected with the valve gap (75) of body base, the top contact sandwich valve (711) of this feeler lever (76),
When goods train heavy duty, empty and load control cock (7) moves down along slide bar with support (71), and contact inhibition dish (73), now, feeler lever (76) is fixed with valve gap (75), control cock piston (710) is subject to the pressure air that brake cylinder (6) passes over to be continued to move down, and make feeler lever (76) back down sandwich valve (711) on control cock piston (710), thus empty and load control cock (7) is opened and connects relay valve (8) and brake cylinder (6);
When goods train is unloaded, empty and load control cock (7) resets to slide bar midway location with support (71), now, control cock piston (710) is subject in the process that pressure air that brake cylinder (6) passes over moves down, feeler lever (76) moves down simultaneously, sandwich valve (711) cuts out, thus empty and load control cock (7) is closed and cuts off relay valve (8) and brake cylinder (6).
5. a kind of brake system for goods train according to claim 4, it is characterized in that, between described sandwich valve (711) and control cock valve body (74) inwall, be also provided with the sandwich valve spring (713) making it reset to close;
The pressure spring (79) for regulable control valve piston (710) movement pressure is also provided with between described control cock piston (710) and control cock valve body (74) inwall;
Described feeler lever (76) and and control cock valve body (74) inwall between be also provided with the second retracing spring (78) for making feeler lever (76) reset.
6. a kind of brake system for goods train according to claim 3, it is characterized in that, described slide bar is also provided with the first return spring assembly (72) for relaxing vehicle vibration disturbance, this first return spring assembly (72) is made up of two retracing springs at difference connection bracket (71) and slide bar two ends.
7. a kind of brake system for goods train according to claim 1, it is characterized in that, described relay valve (8) comprises relay valve (8) valve body, this relay valve (8) valve body is provided with successively lamina membranacea piston chamber (85), exhaust air box (86), medial compartment (88) and air supplying chamber (810), lamina membranacea piston (81) is provided with in described lamina membranacea piston chamber (85), empty and load control cock (7) is connected by pipeline in the side of lamina membranacea piston (81), the exhaust valve (83) of opposite side by piston rod (89) successively connection control exhaust air box (86) switch and confession air-valve (84) of control air supplying chamber (810) switch, described exhaust air box (86) is also provided with exhausr port (82), described medial compartment (88) connects gas-liquid convertor turbocharge valve (10), described air supplying chamber (810) connects for reservoir (9), described medial compartment (88) is also connected to piston rod (89) side by shrinkage cavity (87) with lamina membranacea piston chamber (85) and is connected.
8. a kind of brake system for goods train according to claim 1, is characterized in that, described hydraulic retarder (11) and fuel tank (12) are also provided with radiating gill (13).
9. a kind of brake system for goods train according to claim 8, is characterized in that, described radiating gill (13) in cellular, and adopts wind-cooling heat dissipating pattern to dispel the heat.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610019048.6A CN105501247B (en) | 2016-01-13 | 2016-01-13 | A kind of brakes for goods train |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610019048.6A CN105501247B (en) | 2016-01-13 | 2016-01-13 | A kind of brakes for goods train |
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| CN105501247A true CN105501247A (en) | 2016-04-20 |
| CN105501247B CN105501247B (en) | 2017-11-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610019048.6A Expired - Fee Related CN105501247B (en) | 2016-01-13 | 2016-01-13 | A kind of brakes for goods train |
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| CN109969220A (en) * | 2019-03-26 | 2019-07-05 | 北京交通大学 | A kind of heavy haul train cyclic brake method and system based on double air brake pipes |
| CN110509949A (en) * | 2019-08-09 | 2019-11-29 | 中车青岛四方机车车辆股份有限公司 | Train speed regulating device |
| WO2020062404A1 (en) * | 2018-09-29 | 2020-04-02 | 中车资阳机车有限公司 | Hydraulic braking control unit having empty-load braking function |
| CN112550253A (en) * | 2020-12-10 | 2021-03-26 | 同济大学 | Freight train empty and heavy vehicle grading adjustment device and adjustment method |
| CN113844490A (en) * | 2021-10-12 | 2021-12-28 | 中车株洲电力机车有限公司 | Air backup braking system, braking method and rail transit vehicle |
| CN115384572A (en) * | 2022-07-12 | 2022-11-25 | 眉山中车制动科技股份有限公司 | High-precision pressure control structure for railway vehicle |
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