CN200948789Y

CN200948789Y - Railway freight-car heat shaft automatic braking device

Info

Publication number: CN200948789Y
Application number: CN 200620097454
Authority: CN
Inventors: 翟国俊; 王有宝; 周晓扬
Original assignee: China South Locomotive & Rolling Stock Group Wuhan Jianghan Vehicle Factory
Current assignee: CRRC Yangtze Co Ltd
Priority date: 2006-06-29
Filing date: 2006-06-29
Publication date: 2007-09-19
Anticipated expiration: 2016-06-29

Abstract

A railway freight hot box automatic braking device is engaged in solving the problems of the usual vehicle operation accidents like hot box, excessively heated axle and hot cut and so on, which comprises the heat conduction pipes on each rolling bearing outer ring of the railway freight. The heat conduction pipes are closed on one end and open on the other, the closed end of which is arc surfaced and closely joints with the lower part of the rolling bearing outer ring to conduct the heat on the rolling bearing synchronously. A vent hole is opened with on the side face of the lower part of the heat conduction pipe closed end, in which is filled with a fusible plug that can melt when the temperature of the rolling bearing increases to a certain limit, while the open end of the heat conduction pipe connects a branch pipe that connects with the master braking pipe of the railway freight. The device can rapidly brake the freight even when no one knows that a bearing has gone wrong, which can effectively avoid the excessively high temperature rolling bearing running with high speed continuously, so that the accidents like hot box, excessively heated axle and hot cut can be prevented to ensure the transportation safety of the railway freights.

Description

Railway truck hot box automatic brake arrangement

Technical field

The utility model relates to railway truck safe operation device, refers to a kind of railway truck hot box automatic brake arrangement particularly.

Background technology

Along with the continuous speed-raising of China railways Freight Transport, it is particularly important that the truck vehicle safe operation seems.In China railways truck vehicle driving grave accident, the interruption of service that causes because of vehicle hot box, combustion axle, overheating of axle bearing occupies bigger ratio.At present, though on railroad track, be provided with the infrared axle temperature detection net, played certain effect for preventing the overheating of axle bearing accident, but because influence of various factors, for example infrared ray train-examiner's carelessness, instrument and equipment fault etc. and the omission that causes still happens occasionally vehicle hot box accident.Railway truck operation if grave accident, the railway extensions are obstructed a few hours, even tens hours.For this reason, the railway department has been stipulated in " infrared axle temperature detection technical supervision rules " that train travels the divisions of responsibility can of the grave accident that overheating of axle bearing accident or combustion axle cause has been taken place in 70 kilometers after instrument detecting, yet the accident of hot box, combustion axle and overheating of axle bearing be in short-term, rapid, uppity, the heavy economic losses that the accident generation is produced is difficult to retrieve.

Summary of the invention

Aim of the present utility model provides a kind of railway truck hot box automatic brake arrangement, this device can be under the situation of Nobody Knows a certain bearing et out of order of running train braking train rapidly, the antifriction-bearing box that effectively prevents excessive temperature continues high-speed operation, thereby avoid vehicle generation hot box, combustion axle, overheating of axle bearing accident, guarantee the transportation safety of goods train vehicle.

For achieving the above object, the railway truck hot box automatic brake arrangement that the utility model is designed, comprise on each housing washer that is arranged on railway truck and with each antifriction-bearing box heat pipe one to one, described heat pipe is end sealing and the structure of other end opening.The closed end of heat pipe is arc surfaced, and fits tightly the bottom, outer ring at antifriction-bearing box, is used for the heat of synchronous conductive scroll bearing.Side, the closed end of heat pipe below has a deflation hole, is filled with fusible plug in this deflation hole, and this fusible plug is made by low melting point alloy, the physical property that can melt when having in temperature 〉=110 ℃, can be welded as a whole with heat pipe in the time of≤110 ℃.Further, the front end of above-mentioned deflation hole is provided with the wind whistle, and the wind whistle is fixed on the heat pipe with spring holder.The open end of heat pipe is connected with arm, and arm links to each other with the main brake pipe of railway truck.Further, between the main brake pipe of above-mentioned arm and railway truck, be provided with shutoff valve.

The utility model utilizes the principle of rail wagon brake system exhaust step-down braking, the temperature rise of rail wagon brake system with the running bearing organically is combined as a whole, its working process is such: under the normal operation conditions of railway truck, shutoff valve is opening, and the blast in the main brake pipe of railway truck enters in the front end osed top heat pipe by arm.When a certain antifriction-bearing box et out of order, its temperature of the railway truck of high-speed cruising reach 110 ℃ of work boundaries of regulation in " goods train vehicle technical supervision rules ", the heat pipe that fits tightly with antifriction-bearing box also is warming up to more than 110 ℃ simultaneously, fusible plug in the heat pipe deflation hole begins fusing, deflation hole is blown logical under the effect of blast, wind in the railway truck main brake pipe is arranged to atmosphere, the pressure decay of train braking system, the beginning stopping-down is controlled at contingent great train operation accident in the rudiment.In this simultaneously, the wind whistle that is arranged on the deflation hole front end takes place to report to the police under the effect of air-flow and rings, and makes the driver and conductor find the fault bearing rapidly in long lorry operation marshalling, so that instant the processing.

Advantage of the present utility model is: this device is too high very of short duration to the whole process of train being implemented autobrake from measuring the fault bearing temperature, can effectively prevent to take place, avoid these accidents under the situation that Nobody Knows, to continue development because of rolling bearing fault makes the grave accident of running train generation hot box, combustion axle, overheating of axle bearing.And after the driver and conductor distinguishes the fault bearing by the wind whistle, the closing fault vehicle leads to the shutoff valve of heat pipe rapidly, and train braking system is alleviated, and train can continue to go slowly on station, the place ahead section or the branch line, the line is busy when assurance accident train was not long, guarantees that railway is unimpeded.

Description of drawings

Fig. 1 is distributed in position view on each antifriction-bearing box of a lorry for railway truck hot box automatic brake arrangement;

Fig. 2 is installed in the particular location scheme drawing of a housing washer bottom for this device;

Fig. 3 looks the structure for amplifying scheme drawing for the master that this device and housing washer fit tightly;

The cross-sectional side structure for amplifying scheme drawing that Fig. 4 fits tightly for this device and housing washer;

Fig. 5 is the various pipeline jointing construction scheme drawings of this device.

The specific embodiment

Below in conjunction with the drawings and specific embodiments the utility model is described in further detail:

Railway truck hot box automatic brake arrangement shown in the figure has eight heat pipes 2 on eight antifriction-bearing box 3 outer rings that are separately positioned on railway truck.The pipe shaft of heat pipe 2 is made up of first half rectangular section and latter half cylindrical section, and the size of described rectangular section makes the external structure of heat pipe 2 be step greater than the size of described cylindrical section.The rectangular section end face of heat pipe 2 is a closed end, and this closed end is arc surfaced, and the external diameter of its dimensional parameters and antifriction-bearing box 3 is complementary, and is convenient to this closed end and fits tightly bottom, outer ring at antifriction-bearing box 3, with the heat of synchronous conductive scroll bearing.Be set with preloading spring 8 on the cylindrical section of heat pipe 2, the two ends of preloading spring 8 are supported on respectively on the rectangular section lower end and adapter plate 7 of

heat pipe

2, and 7 of adapter plates are fixed on the bogie side frame 4 of roller bearing adapter stabilizer bar, and such structure is convenient to the installing and locating of heat pipe 2.

Have only the closed end of heat pipe 2 and the outer ring of antifriction-bearing box 3 to fit tightly, could guarantee that antifriction-bearing box 3 is consistent with the temperature conduction of heat pipe 2.In rolling stock, there are two kinds of factors to make to produce the gap between heat pipe 2 and the antifriction-bearing box 3 or separate.The one, the physical dimension and the shape error of the cambered surface of heat pipe 2 closed ends and antifriction-bearing box 3 outer rings; The 2nd, because heat pipe 2 is fixed on by adapter plate 7 on the bogie side frame 4 of roller bearing adapter stabilizer bar, bogie side frame 4 can produce the displacement gap with the axletree on the go because of jolting.Adopt with following two kinds of enhancements at these two these devices of problem are concrete: the first is filled one deck heat conductive silicon grease material 18 between the outer ring of the closed end of heat pipe 2 and antifriction-bearing box 3, the minim gap that causes with elimination physical dimension and shape error.It two is to improve the common preloading spring deficiency of play up and down easily, it is designed to telescopic rubber spring 8, separate with collet 9 between the cylindrical section of this rubber spring 8 and heat pipe 2, separate with heat insulating mattress 10 between this rubber spring 8 and the adapter plate 7, and make rubber spring 8 that certain precompressed amount is arranged when mounted, train with the compensation operation produces the displacement gap of axletree and bogie side frame owing to jolt, and makes heat pipe 2 and antifriction-bearing box 3 remain fit-state.Above-mentioned rubber spring 8, collet 9 and heat insulating mattress 10 all can adopt the nylon 1010 engineering plastics to make.

The side, rectangular section closed end below of heat pipe 2 has a deflation hole 17, be filled with fusible plug 11 in this deflation hole 17, fusible plug 11 usefulness low melting point alloys are made, and it can melt during in temperature 〉=110 ℃, and can be welded as a whole with heat pipe 2 during in temperature≤110 ℃.Deflation hole 17 adopts the coniform hole that enlarges outward, so that be blown easily during fusible plug 11 fusings.

The marshalling of general railroad boxcar is longer, all more than 60, judges that rapidly a certain accident antifriction-bearing box is very important.For this reason, be provided with the wind whistle 12 of warning effect at tapered deflation hole 17 front ends of heat pipe 2, the wind whistle 12 is fixed on the heat pipe 2 by elastic positioning pin 13, becomes the part of heat pipe 2.When making heat pipe 2 exhausts when fusible plug 11 fusing, because the motion of air-flow, ring in the wind whistle 12, thus concrete position that can the clear failure bearing.

The cylindrical section end face of heat pipe 2 is an open end, and its open end elbow coupling 14, rubber tube 15 by 90 ° successively links to each other with arm 1, and arm 1 links to each other with the main brake pipe 6 of railway truck.Goods train vehicle has its uniqueness, i.e. the wheel of car body and bogie truck the play of upper and lower displacement is arranged, and the main brake pipe 6 of train is to be fixed on the car body, and 2 of heat pipes are fixed on the bogie side frame 4 of bogie truck.Therefore, the pipeline that leads to heat pipe 2 by main brake pipe 6 can not adopt and be rigidly connected, and should adopt one section rubber tube 15 to realize soft connection.Because railway truck running environment is more abominable, rubber tube 15 is fragile, therefore overlaps layer of metal bellows 16 on rubber tube 15, with the normal use of protection rubber tube 15.

Be provided with shutoff valve 5 between the main brake pipe 6 of above-mentioned arm 1 and railway truck, shutoff valve 5 can be controlled the air intake of eight heat pipes 2 on the lorry.

Principle of work of the present utility model is such: during train operation, shutoff valve 5 is opened, and the blast of train main brake pipe 6 is delivered in each heat pipe 2 by each arm 1 and rubber tube 15, and this moment, heat pipe 2 was consistent with the blast in the train main brake pipe 6.When the antifriction-bearing box 3 of the some wheels of train breaks down, heats up unusually 〉=110 ℃ the time, the heat pipe 2 that fits tightly with antifriction-bearing box 3 is in same state of temperature, fusible plug 11 in the deflation hole 17 of heat pipe 2 begins fusing, deflation hole 17 is blown open under the effect of blast, and the wind whistle 12 begins to ring.Alleviate because rail wagon brake system is energy brake, inflation, behind the pressure decay of whole train braking system, the train of high-speed cruising begins stopping-down.Can avoid the fault antifriction-bearing box under the too high state of temperature, to continue operation thus, the hot box accident is controlled at bud, guarantee safety of railway traffic.After distinguishing a certain fault bearing, close shutoff valve 5, the wind regime of the heat pipe 2 on the disengagement failure bearing, the train braking system inflation is alleviated, train can continue moving at a slow speed row to station, the place ahead section or branch line, at short notice settlement of accident is finished, and guarantees the unimpeded of railway line.

Claims

1, a kind of railway truck hot box automatic brake arrangement, comprise on each antifriction-bearing box (3) outer ring that is arranged on railway truck and with each antifriction-bearing box (3) heat pipe (2) one to one, it is characterized in that: described heat pipe (2) is that an end seals and the structure of other end opening, its closed end is arc surfaced, and fits tightly the bottom, outer ring at antifriction-bearing box (3); Its side, closed end below has a deflation hole (17), is filled with fusible plug (11) in this deflation hole (17); Its open end is connected with arm (1), and arm (1) links to each other with the main brake pipe (6) of railway truck.

2, railway truck hot box automatic brake arrangement according to claim 1, it is characterized in that: the external structure of described heat pipe (2) is step, its first half near closed end is thick, thin near the latter half of open end, its latter half is set with preloading spring (8), the two ends of preloading spring (8) are supported on respectively on the first half and adapter plate (7) of heat pipe (2), and adapter plate (7) then is fixed on the bogie side frame (4) of roller bearing adapter stabilizer bar.

3, railway truck hot box automatic brake arrangement according to claim 2, it is characterized in that: described preloading spring (8) is a rubber spring (8), be provided with collet (9) between the latter half of this rubber spring (8) and heat pipe (2), be provided with heat insulating mattress (10) between this rubber spring (8) and the adapter plate (7).

4, according to claim 1 or 2 or 3 described railway truck hot box automatic brake arrangements, it is characterized in that: also be filled with one deck heat conductive silicon grease material (18) between the outer ring of the closed end of described heat pipe (2) and antifriction-bearing box (3).

5, according to claim 1 or 2 or 3 described railway truck hot box automatic brake arrangements, it is characterized in that: described deflation hole (17) is the coniform hole that enlarges outward.

6, according to claim 1 or 2 or 3 described railway truck hot box automatic brake arrangements, it is characterized in that: the front end of described deflation hole (17) is provided with the wind whistle (12), and the wind whistle (12) are fixed on the heat pipe (2) with spring holder (13).

7, according to claim 1 or 2 or 3 described railway truck hot box automatic brake arrangements, it is characterized in that: the open end of described heat pipe (2) links to each other with arm (1) by elbow coupling (14), rubber tube (15) successively, the outer metal bellow (16) that is with of rubber tube (15).

8, according to claim 1 or 2 or 3 described railway truck hot box automatic brake arrangements, it is characterized in that: be provided with shutoff valve (5) between the main brake pipe (6) of described arm (1) and railway truck.