CN103674446B - A kind of speed-raising railroad coach bogie tightness test system and method - Google Patents
A kind of speed-raising railroad coach bogie tightness test system and method Download PDFInfo
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- CN103674446B CN103674446B CN201310700863.5A CN201310700863A CN103674446B CN 103674446 B CN103674446 B CN 103674446B CN 201310700863 A CN201310700863 A CN 201310700863A CN 103674446 B CN103674446 B CN 103674446B
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Abstract
One speed-raising railroad coach bogie tightness test system of the present invention, comprise suspension rod screw rod, bolster, air spring, spring tray, stop valve and differential pressure valve and altitude valve, bolster is positioned at above spring tray, air spring is between bolster with spring tray and be connected differential pressure valve between air spring, altitude valve is connected with air spring and communicates, suspension rod screw rod connects baffle plate and nut, bolster and spring tray are all between baffle plate and nut, and suspension rod screw rod runs through spring tray and is flexibly connected with spring tray, stop valve and altitude valve, air spring connects successively and communicates.Air tightness testing method of the present invention mainly comprises test macro assembling, inflation, pressurize test and judges impermeability.Utilize the present invention namely can test bogie impermeability before bogie Batch assemblage, avoid reclamation work defective caused because of impermeability after bogie has been assembled, greatly reduce bogie testing cost.
Description
Technical field
The present invention relates to speed-raising railroad coach bogie technical field of measurement and test, especially relate to a kind of speed-raising railroad coach bogie tightness test system and method.
Background technology
Existing Speed Increased Passenger Car Bogies all have employed air spring as vibration absorption unit, repair in shop, Duan Xiushi are being implemented to bogie, need to carry out air tightness test to the airtight pipe system of air spring wherein and accessory thereof, to ensure that passenger vehicle is when normal operation, can not leakage problem be there is because of air spring or airtight pipe system and cause damping bad, reduce the riding quality of passenger vehicle.
Existing speed-raising railroad coach bogie air tightness test is all carried out after bogie has been assembled, its method of testing is, first logical pressure air in the airtight pipeline of bogie, exert pressure to bogie again, utilize altitude valve to regulate and keep bogie height, along with the stressed increase of bogie, the air pressure in the air spring in bogie raises gradually.When the air pressure in air spring reaches air tightness test standard 0.6MPa, stop inflating in air spring, then carry out pressurize test, according to air tightness test standard, this dwell time is 20 minutes.If within 20 minutes standard dwell times, the drop-out value of the air pressure in air spring is no more than 10KPa, then illustrate that air tightness test is qualified, otherwise air tightness test is defective.Because existing air tightness testing method needs special testing apparatus, and the pressure energy that testing apparatus provides reaches 400KN, therefore, require higher to testing apparatus, in addition, when the gas pressure intensity in air spring reaches air tightness test standard 0.6MPa, the actual loading of bogie will reach 300KN, about reach the twice of its normal load, this obviously can cause adverse effect to the intensity of bogie; Meanwhile, special testing apparatus is expensive, is also unfavorable for the reduction of bogie air tightness test cost.
Summary of the invention
The technical problem to be solved in the present invention is: for prior art Problems existing, a kind of speed-raising railroad coach bogie tightness test system and method are provided, safe and reliable air tightness test can be carried out to bogie before bogie assembling, reduce and special test place and testing apparatus are relied on, save the test duration, reduce testing cost.
The technical problem to be solved in the present invention realizes by the following technical solutions: a kind of speed-raising railroad coach bogie tightness test system, comprise suspension rod screw rod, bolster, air spring, spring tray, stop valve and differential pressure valve and altitude valve, described bolster is positioned at above spring tray, described air spring is between bolster with spring tray and be connected differential pressure valve between air spring, described altitude valve is connected with air spring and communicates, described suspension rod screw rod connects baffle plate and nut, described bolster and spring tray are all between baffle plate and nut, and suspension rod screw rod runs through spring tray and is flexibly connected with spring tray, described stop valve and altitude valve, air spring connects successively and communicates.
Preferably, described tightness test system also comprises pressure transducer, and described pressure transducer is connected between stop valve and altitude valve.
Preferably, described tightness test system also comprises clamping plate and shrouding, and described clamping plate take the shape of the letter U, and its bottom offers the second through hole, and described shrouding is fixedly connected on clamping plate openend, and shrouding offers first through hole corresponding with the second through hole.
Preferably, the clamping plate in described tightness test system are provided with two pieces, and are channel-section steel, and the bottom of each block clamping plate offers two the second through holes.
Preferably, described suspension rod screw rod is provided with four, is distributed in spring tray corner and forms with spring tray to be flexibly connected.
The method of testing of above-mentioned a kind of railroad coach bogie tightness test system that raises speed, comprises the steps:
1st step, bogie tightness test system is assembled, and it is correct, reliable to confirm that system pipeline connects;
2nd step, inflation; Adjustment altitude valve, shutoff air spring exhausr port, to air spring inflation until air spring internal gas pressure value reaches testing standard value, then closes stop valve;
3rd step, pressurize is tested; Remain off valve closed condition, record air spring internal gas pressure initial value, the dwell time records air spring internal gas pressure end value after reaching pressurize testing standard value;
4th step, according to recorded air spring internal gas pressure initial value and end value, judges whether tightness test system exists leakage:
(1) if the air pressure that the difference of air spring internal gas pressure initial value and end value is less than or equal to setting reduces permissible value, air tightness test is qualified;
(2) if the air pressure that the difference of air spring internal gas pressure initial value and end value is greater than setting reduces permissible value, air tightness test is defective.
Preferably, in the 2nd step of described method of testing, when air spring internal gas pressure value reaches 0.4-0.7MPa, close stop valve.
Preferably, the dwell time in described method of testing the 3rd step is set as 10-30 minute, and records air spring internal gas pressure initial value and end value within the concrete dwell time of setting.
Preferably, it is 8-12KPa that the air pressure set in described method of testing the 4th step reduces permissible value.
Preferably, described air spring internal gas pressure value is read by pressure transducer, and described pressure transducer is connected between stop valve and altitude valve.
Compared with prior art, the invention has the beneficial effects as follows: by carrying out little assembling to the bolster, air spring, spring tray, altitude valve, differential pressure valve etc. of bogie before bogie assembling, suspension rod screw arbor assembly, stop valve is coordinated jointly to form bogie tightness test system again, in the pipeline of test macro, pass into pressure air again and make air spring inflation, when pressure in air spring is elevated to testing standard value, stop inflation, can judge whether to exist according to the pressure drop low value recorded in the dwell time and leak.Therefore, adopt the present invention not need special press device, greatly saved testing apparatus expense; And whether just can test out its impermeability before the formal production and assembly of bogie qualified, can avoid bogie assembled after because defective the caused reclamation work of impermeability, saved the assembling of bogie, test duration, improve production efficiency; In addition, test macro of the present invention is simple, and method of testing is safe and reliable, can reduce the dependence of test to place, equipment, time, reduce bogie testing cost.
Accompanying drawing explanation
Fig. 1 is the structural map of a kind of railroad coach bogie tightness test system that raises speed of the present invention.
Fig. 2 is the front view of Fig. 1 middle hanger screw rod and backstop assembly.
Fig. 3 is the left view of Fig. 1 middle hanger screw rod and backstop assembly.
Fig. 4 is the front view of shrouding and clamping plate assembly in Fig. 1.
Fig. 5 is the left view of shrouding and clamping plate assembly in Fig. 1.
Mark in figure: 1-suspension rod screw rod, 2-clamping plate, 3-baffle plate, 4-shrouding, 5-bolster, 6-air spring, 7-spring tray, 8-differential pressure valve, 9-stop valve, 10-pressure transducer, 11-nut, 12-altitude valve, 13-first through hole, 14-second through hole.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with the drawings and specific embodiments, the present invention is described in detail.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
One speed-raising railroad coach bogie tightness test system as shown in Figure 1, mainly comprise suspension rod screw rod 1, bolster 5, air spring 6, spring tray 7, differential pressure valve 8 and stop valve 9 and altitude valve 12, suspension rod screw rod 1 wherein connects baffle plate 3 and nut 11, and the thread end of suspension rod screw rod 1 directly run through spring tray 7 and by nut 11 and spring tray 7 form removable divide be flexibly connected.In order to make air spring 6 uniform force in inflation process, described suspension rod screw rod 1 is provided with four, is distributed in spring tray 7 four jiaos, and four suspension rod screw rods 1 with the axis of symmetry of spring tray 7 for symcenter is symmetrical between two; The baffle plate 3 be connected with suspension rod screw rod 1 is square plates, as shown in Figure 2 and Figure 3, both can be welded and fixed between baffle plate 3 wherein and suspension rod screw rod 1, also can be that screw thread is flexibly connected, and regulates spacing between bolster 5 and spring tray 7 to facilitate by adjustment baffle plate 3.Conveniently tester's adjusting nut 11, described nut 11 adopts bogie distinguish copper nut.Bolster 5 in this test macro is positioned at above spring tray 7, and described air spring 6 is between bolster 5 and spring tray 7, and bolster 5 and spring tray 7 are all between baffle plate 3 and nut 11.Because the air spring 6 in bogie is two, in order to simulate bogie duty truly, ensure the reliability of bogie air tightness test, between two air springs 6, connect a differential pressure valve 8, the air pressure in two air springs 6 can be regulated to reach balance by differential pressure valve 8.The outermost and being connected with air spring 6 that described altitude valve 12 is arranged on spring tray 7 top communicates, and described stop valve 9 is connected successively with altitude valve 12, air spring 6 and communicates, thus the bogie tightness test system of a composition simple structure.
After the pressure air of outside enters bogie pipe system from stop valve 9, because air spring 6 exhausr port is in advance by shutoff, air spring 6 inflation, bolster 5 is driven to move upward relative to spring tray 7, because bolster 5 and spring tray 7 stop air spring 6 to expand, thus cause air spring 6 air pressure inside to raise gradually, by the adjustment of differential pressure valve 8, finally make the air pressure of two air spring 6 inside all reach air tightness test standard value; When the air pressure of air spring 6 inside reaches air tightness test standard value, the baffle plate 3 that bolster 5 is subject to suspension rod screw rod 1 connects limits and keeps stationary state relative to baffle plate 3, simultaneously, the height that altitude valve 12 in this test macro also can control air spring 6 no longer continues to increase, thus make air spring 6 air pressure inside keep air tightness test standard value, and there is the height identical with the air spring in bogie course of normal operation, bogie air tightness test result can be made so more reliable.The actual pressure value of conveniently tester's monitoring, reading air spring 6 inside, can be connected a pressure transducer 10 between stop valve 9 with altitude valve 12.After pressure transducer 10 detects that the actual pressure value of air spring 6 inside reaches air tightness test standard value, stop inflation, close stop valve 9, namely test macro enters packing state, the duration of this packing state must meet the standard dwell time of bogie air tightness test, tester can record the reading of this dwell time section pressure sensor 10, namely by the difference between this initial value and end value, the initial value of air spring 6 air pressure inside and end value, judge that whether bogie impermeability is qualified.
Because the diameter of air spring 6 is larger, in inflation process, even in order to ensure two air spring 6 distribution of forces, also make single air spring 6 uniform force in the same direction simultaneously, as the preferred embodiment of one, clamping plate 2 and shrouding 4 can be increased in above-mentioned bogie tightness test system.As shown in Figure 4, Figure 5, clamping plate 2 wherein adopt the channel-section steel taken the shape of the letter U, and are provided with two pieces altogether, offer two the second through holes 14 in the bottom of each block clamping plate 2, and the length of described two clamping plates 2 is all greater than or equal to the diameter of air spring 6.Shrouding 4 is wherein rectangular flat plate, and shrouding 4 offers first through hole 13 corresponding with the second through hole 14, and described shrouding 4 is also two pieces, is welded and fixed respectively with clamping plate 2 openend.When test macro is assembled, clamping plate 2 are distributed in bolster 5 both sides with the axis of symmetry of bolster 5 for symcenter is parallel, clamping plate 2 bottom is relative with bolster 5 top, shrouding 4 top is relative with baffle plate 3 bottom, described suspension rod screw rod 1 runs through the first through hole 13, second through hole 14 and spring tray 7 successively, nut 11 is in spring tray 7 bottom and be buckled on suspension rod screw rod 1, as shown in Figure 1.When air spring 6 inflation, drive bolster 5 to move upward relative to spring tray 7, until baffle plate 3 stops shrouding 4 to continue to rise, now, bolster 5 top is close to bottom clamping plate 2, and keeps static relative to baffle plate 3.Adopt such structure can ensure that whole test macro keeps relative stability in gas replenishment process, and the stressed basis equalization of air spring 6, be conducive to the reliability improving air tightness test result.
The method of testing of a kind of railroad coach bogie tightness test system that raises speed of the present invention, main contents comprise the steps:
First, as shown in Figure 2 and Figure 3, bogie steeve screw rod 1 has welded baffle plate 3, utilized channel-section steel to make clamping plate 2, and be welded and fixed shrouding 4 at clamping plate 2 openend, as shown in Figure 5; Again spring tray 7 is placed on a platform, successively air spring 6, bolster 5 are placed on spring tray 7, connect the pipeline between air spring 6, altitude valve 12, differential pressure valve 8, on bogie pipeline, connect a three-way connection simultaneously, install stop valve 9 and pressure transducer 10 respectively, and pressure transducer 10 is connected between stop valve 9 and altitude valve 12; Clamping plate 2 are placed on bolster 5, suspension rod screw rod 1 is successively through after shrouding 4, clamping plate 2, spring tray 7, distinguish nut 11 is buckled on suspension rod screw rod 1, namely completes the little assembling to bogie tightness test system, confirm after having assembled that system pipeline connects again correct, reliable.
Then, adjust altitude valve 12, the pressure air pipeline of outside is connected with stop valve 9, shutoff air spring 6 exhausr port, open stop valve 9 again to inflate in air spring 6, air spring 6 expands gradually and highly increases, thus drive bolster 5 to move upward relative to spring tray 7, due to bolster 5, clamping plate 2, shrouding 4, the acting in conjunction of the deadweight of parts such as suspension rod screw rod 1 grade and the resistance of spring tray 7, air spring 6 air pressure inside is caused to raise gradually, when air spring 6 highly reaches bogie normal operating conditions, because altitude valve 12 has exhaust pressure relief effect, the height that can control air spring 6 no longer continues to increase, if when pressure transducer 10 reading reaches air tightness test standard value, the air pressure of air spring 6 inside also reaches air tightness test standard value.The air tightness test standard value normally 0.4-0.7Mpa at this place, concrete value is variant according to the specification difference of air spring 6, and the value in the present embodiment is 0.6Mpa.When air spring 6 air pressure inside value reaches 0.6Mpa, close stop valve 9, namely bogie tightness test system enters packing state.
Next, remain off valve 9 closed condition, record pressure transducer 10 reading is as air spring 6 internal gas pressure initial value, and this period of dwell time must reach standard dwell time value; The standard dwell time value at this place is set as 10-30 minute usually, and concrete value is variant according to the specification difference of air spring 6, and the value in the present embodiment is 20 minutes.When the actual dwell time reaches 20 minutes, again record pressure transducer 10 reading as air spring 6 internal gas pressure end value.
Finally, calculate difference between the two according to recorded air spring 6 internal gas pressure initial value, end value, compared with this difference is reduced permissible value with the air pressure of setting, thus judge whether tightness test system exists leakage.The air pressure of this place setting reduces permissible value normally 8-12KPa, and concrete value is variant according to the specification difference of air spring 6, and the value in the present embodiment is 10KPa.Specifically, if the difference of air spring 6 internal gas pressure initial value and end value is less than or equal to 10KPa, then illustrate that bogie air tightness test is qualified; If the difference of air spring 6 internal gas pressure initial value and end value is greater than 10KPa, then illustrate that bogie air tightness test is defective.
In sum, the present invention by carrying out little assembling to bolster 5, air spring 6, spring tray 7, altitude valve 12, differential pressure valve 8 etc. before the formal Batch assemblage of bogie, coordinate suspension rod screw rod 1 assembly, stop valve 9 and pressure transducer 10 composition bogie tightness test system jointly again, do not need the necessary special pressure equipment of conventional test methodologies completely, simple, can greatly save testing apparatus expense.Method of testing of the present invention makes air spring 6 inflation by passing into pressure air in the air spring 6 of this test macro, when in air spring 6, pressure is elevated to testing standard value, stop inflation, can judge whether to exist according to the pressure drop low value recorded in the dwell time and leak, thus whether can test out its impermeability before the formal production and assembly of bogie qualified, avoid reclamation work defective caused because of impermeability after bogie has been assembled, and this method of testing is safe and reliable, avoid conventional test methodologies to test site, equipment, the dependence of time, save the assembling of bogie, test duration, improve production efficiency, be conducive to reducing bogie air tightness test cost.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, it should be pointed out that all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. a speed-raising railroad coach bogie tightness test system, comprise bolster (5), air spring (6), spring tray (7) and differential pressure valve (8) and altitude valve (12), described bolster (5) is positioned at spring tray (7) top, described air spring (6) to be positioned between bolster (5) with spring tray (7) and to be connected differential pressure valve (8) between air spring (6), described altitude valve (12) is connected with air spring (6) and communicates, it is characterized in that: also comprise suspension rod screw rod (1), clamping plate (2) and shrouding (4) and stop valve (9), described suspension rod screw rod (1) connects baffle plate (3) and nut (11), described clamping plate (2) take the shape of the letter U, its bottom offers the second through hole (14), described shrouding (4) is fixedly connected on clamping plate (2) openend, shrouding (4) offers first through hole (13) corresponding with the second through hole (14), described bolster (5) and spring tray (7) are all positioned between baffle plate (3) and nut (11), and suspension rod screw rod (1) runs through spring tray (7) and is flexibly connected with spring tray (7), described stop valve (9) and altitude valve (12), air spring (6) connects successively and communicates.
2. one speed-raising railroad coach bogie tightness test system according to claim 1, it is characterized in that: described tightness test system also comprises pressure transducer (10), described pressure transducer (10) is connected between stop valve (9) and altitude valve (12).
3. one speed-raising railroad coach bogie tightness test system according to claim 1, it is characterized in that: the clamping plate (2) in described tightness test system are provided with two pieces, and being channel-section steel, the bottom of each block clamping plate (2) offers two the second through holes (14).
4. the one speed-raising railroad coach bogie tightness test system according to claims 1 or 2, is characterized in that: described suspension rod screw rod (1) is provided with four, is distributed in spring tray (7) corner and forms with spring tray (7) to be flexibly connected.
5. the method for testing of a kind of railroad coach bogie tightness test system that raises speed as claimed in claim 1, is characterized in that: comprise the steps:
1st step, bogie tightness test system is assembled, and it is correct, reliable to confirm that system pipeline connects;
2nd step, inflation; Adjustment altitude valve (12), shutoff air spring (6) exhausr port, to air spring (6) inflation until air spring (6) internal gas pressure value reaches testing standard value, then closes stop valve (9);
3rd step, pressurize is tested; Remain off valve (9) closed condition, record air spring (6) internal gas pressure initial value, the dwell time records air spring (6) internal gas pressure end value after reaching pressurize testing standard value;
4th step, according to recorded air spring (6) internal gas pressure initial value and end value, judges whether tightness test system exists leakage:
(1) if the air pressure that the difference of air spring (6) internal gas pressure initial value and end value is less than or equal to setting reduces permissible value, air tightness test is qualified;
(2) if the air pressure that the difference of air spring (6) internal gas pressure initial value and end value is greater than setting reduces permissible value, air tightness test is defective.
6. the method for testing of a kind of railroad coach bogie tightness test system that raises speed according to claim 5, is characterized in that: in the 2nd step of described method of testing, when air spring (6) internal gas pressure value reaches 0.4-0.7MPa, closes stop valve (9).
7. the method for testing of a kind of railroad coach bogie tightness test system that raises speed according to claim 5, it is characterized in that: the dwell time in described method of testing the 3rd step is set as 10-30 minute, and record air spring (6) internal gas pressure initial value and end value within the concrete dwell time of setting.
8. the method for testing of a kind of railroad coach bogie tightness test system that raises speed according to claim 5, is characterized in that: it is 8-12KPa that the air pressure set in described method of testing the 4th step reduces permissible value.
9. the method for testing of a kind of railroad coach bogie tightness test system that raises speed according to claim 5 or 6, it is characterized in that: described air spring (6) internal gas pressure value is read by pressure transducer (10), and described pressure transducer (10) is connected between stop valve (9) and altitude valve (12).
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105014596B (en) * | 2015-06-30 | 2016-11-30 | 中车南京浦镇车辆有限公司 | The plugging technology of truck bolster pore |
| CN108225691A (en) * | 2018-03-21 | 2018-06-29 | 青岛杰奥德空气减震有限公司 | Gas examines crimping machine and its control method and air spring detection crimping method |
| CN112985707B (en) * | 2019-12-16 | 2023-03-21 | 中车唐山机车车辆有限公司 | Automatic car coupler and buffer device air tightness test method |
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| JP2005239077A (en) * | 2004-02-27 | 2005-09-08 | Mitsubishi Fuso Truck & Bus Corp | Air spring control device |
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