CN103674446A - Acceleration railway passenger train bogie air tightness testing system and method - Google Patents
Acceleration railway passenger train bogie air tightness testing system and method Download PDFInfo
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- CN103674446A CN103674446A CN201310700863.5A CN201310700863A CN103674446A CN 103674446 A CN103674446 A CN 103674446A CN 201310700863 A CN201310700863 A CN 201310700863A CN 103674446 A CN103674446 A CN 103674446A
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Abstract
The invention relates to an acceleration railway passenger train bogie air tightness testing system. The acceleration railway passenger train bogie air tightness testing system comprises a suspender screw, a swing bolster, air springs, a spring tray, a stop valve, a differential valve and an altitude valve, the swing bolster is located above the spring tray, the air spring is located between the swing bolster and the spring tray, the differential valve is connected between the air springs, the altitude valve is communicated with the air springs, a baffle and a nut are connected to the suspender screw, the swing bolster and the spring tray are both located between the baffle and the nut, the suspender screw penetrates through the spring tray to be movably connected with the spring tray, and the stop valve, the altitude valve and the air springs are sequentially communicated. An air tightness testing method mainly includes the steps of testing system assembling, air inflation, pressure maintaining testing and air tightness judging. According to the acceleration railway passenger train bogie air tightness testing system and method, the bogie air tightness can be tested before bogies are assembled in batch, repairing work caused by disqualified air tightness after the bogies are completely assembled is avoided, and the testing cost of the bogies is greatly reduced.
Description
Technical field
The railroad coach bogie technical field of measurement and test that the present invention relates to raise speed, especially relates to a kind of speed-raising railroad coach bogie tightness test system and method.
Background technology
Existing Speed Increased Passenger Car Bogies has all adopted air spring as vibration absorption unit, when bogie enforcement repair in shop, section are repaiied, need to carry out air tightness test to air spring wherein and the airtight pipe system of accessory thereof, to guarantee that passenger vehicle is when normally runing, can not occur that leakage problem causes damping bad because of air spring or airtight pipe system, reduce the riding quality of passenger vehicle.
Existing speed-raising railroad coach bogie air tightness test is all to carry out after bogie has been assembled, its method of testing is, first in the airtight pipeline of bogie, lead to pressure air, to bogie, exert pressure 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, illustrate that air tightness test is qualified, otherwise air tightness test is defective.Because existing air tightness testing method need to have special-purpose testing apparatus, and the pressure energy that testing apparatus provides reaches 400KN, therefore, testing apparatus is had relatively high expectations, 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, approximately reach the twice of its normal load, this obviously can cause adverse effect to the intensity of bogie; Meanwhile, special-purpose 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: the problem existing for prior art, a kind of speed-raising railroad coach bogie tightness test system and method are provided, before bogie assembling, can carry out safe and reliable air tightness test to bogie, minimizing relies on special test place and testing apparatus, 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 spring tray top, described air spring is between bolster and spring tray and be connected differential pressure valve between air spring, described altitude valve is connected and communicates with air spring, on described suspension rod screw rod, connect 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 and communicates successively.
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, offers first through hole corresponding with the second through hole on shrouding.
Preferably, the clamping plate in described tightness test system are provided with two, and are channel-section steel, and the bottom of each piece clamping plate offers two the second through holes.
Preferably, described suspension rod screw rod is provided with four, is distributed in four jiaos of spring trays and forms and be flexibly connected with spring tray.
The method of testing of above-mentioned a kind of railroad coach bogie tightness test system that raises speed, comprises the steps:
The 1st step, the assembling of bogie tightness test system, and it is correct, reliable to confirm that system pipeline connects;
The 2nd step, inflation; Adjust 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;
The 3rd step, pressurize test; Remain off valve closed condition, records air spring internal gas pressure initial value, and the dwell time reaches after pressurize testing standard value, records air spring internal gas pressure end value;
The 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 difference of air spring internal gas pressure initial value and end value is less than or equal to the air pressure of setting, reduce permissible value, air tightness test is qualified;
(2) if the difference of air spring internal gas pressure initial value and end value is greater than the air pressure of setting, reduce 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 of setting in described method of testing the 4th step reduces permissible value.
Preferably, described air spring internal gas pressure value reads 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 the bolster of bogie, air spring, spring tray, altitude valve, differential pressure valve etc. being carried out to little assembling before bogie assembling, coordinate again suspension rod screw arbor assembly, stop valve jointly to form bogie tightness test system, to passing into pressure air in the pipeline of test macro, make air spring inflation again, when in air spring, pressure is elevated to testing standard value, stop inflation, according to the pressure drop low value recording in the dwell time, can judge whether to exist and leak.Therefore, adopt the present invention not need special-purpose 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 to assemble afterwards because defective the caused reclamation work of impermeability, has improved production efficiency at assembling, the test duration of having saved bogie; 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, has reduced 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-the first through hole, 14-the second through hole.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearer, 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, is not intended to limit the present invention.
A kind of 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, on suspension rod screw rod 1 wherein, connect baffle plate 3 and nut 11, and the thread end of suspension rod screw rod 1 directly runs through spring tray 7 and forms removable being flexibly connected of dividing by nut 11 with spring tray 7.In order to make air spring 6, stressed in inflation process evenly described suspension rod screw rod 1 is provided with four, is distributed in 7 four jiaos of spring trays, and four suspension rod screw rods 1 take spring tray 7 axis of symmetry as symcenter symmetrical between two; The baffle plate 3 being connected with suspension rod screw rod 1 is square plates, as shown in Figure 2 and Figure 3, between baffle plate 3 wherein and suspension rod screw rod 1, both can be welded and fixed, can be also that screw thread is flexibly connected, and to facilitate by adjusting baffle plate 3, regulates the spacing between bolster 5 and spring tray 7.In order to facilitate tester's adjusting nut 11, described nut 11 adopts bogie distinguish copper nut.Bolster 5 in this test macro is positioned at spring tray 7 tops, 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 truly bogie duty, the reliability that guarantees bogie air tightness test connects a differential pressure valve 8 between two air springs 6, by differential pressure valve 8, can regulate two air pressure in air spring 6 to reach balance.Described altitude valve 12 is arranged on the outermost on spring tray 7 tops and is connected and communicates with air spring 6, and described stop valve 9 is connected and communicates successively with altitude valve 12, air spring 6, thereby forms the bogie tightness test system of a simple structure.
When outside pressure air is from stop valve 9 enters bogie pipe system, because air spring 6 exhausr ports are in advance by shutoff, air spring 6 inflations, drive bolster 5 to move upward with respect to spring tray 7, due to bolster 5 and spring tray 7 prevention air springs 6 expansions, thereby cause air spring 6 air pressure inside to raise gradually, by the adjusting 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, bolster 5 is subject to baffle plate 3 restrictions that connect on suspension rod screw rod 1 and keeps stationary state with respect to baffle plate 3, simultaneously, the height that altitude valve 12 in this test macro also can be controlled air spring 6 no longer continues to increase, thereby make air spring 6 air pressure inside keep air tightness test standard value, and there is the height identical with air spring in bogie course of normal operation, can make like this bogie air tightness test result more reliable.In order to facilitate tester to monitor, read the actual pressure value of air spring 6 inside, can between stop valve 9 and altitude valve 12, be connected a pressure transducer 10.After actual pressure value that pressure transducer 10 detects air spring 6 inside reaches air tightness test standard value, stop inflation, close stop valve 9, 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, be initial value and the end value of air spring 6 air pressure inside, by the difference between this initial value 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 guarantee two air spring 6 distribution of forces, also make single air spring 6 stressed even in same direction simultaneously, as a kind of preferred embodiment, can in above-mentioned bogie tightness test system, increase clamping plate 2 and shrouding 4.As shown in Figure 4, Figure 5, clamping plate 2 wherein adopt the channel-section steel taking the shape of the letter U, and are provided with altogether two, offer two the second through holes 14 in the bottom of each piece 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, offers first through hole 13 corresponding with the second through hole 14 on shrouding 4, and described shrouding 4 is also two, is welded and fixed respectively with clamping plate 2 openends.When test macro is assembled, clamping plate 2 be take the axis of symmetry of bolster 5 and as symcenter is parallel, are distributed in bolster 5 both sides, clamping plate 2 bottoms are relative with bolster 5 tops, shrouding 4 tops are relative with baffle plate 3 bottoms, described suspension rod screw rod 1 runs through the first through hole 13, the second through hole 14 and spring tray 7 successively, nut 11 is in spring tray 7 bottoms 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 with respect to spring tray 7, until baffle plate 3 stops shrouding 4 to continue to rise, now, clamping plate 2 bottoms are close at bolster 5 tops, and keep static with respect to baffle plate 3.Adopt such structure can guarantee that whole test macro keeps relative stability in gas replenishment process, and the stressed basis equalization of air spring 6, be conducive to improve the reliability of 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, on bogie steeve screw rod 1, welded baffle plate 3, utilized channel-section steel to make clamping plate 2, and be welded and fixed shrouding 4 at clamping plate 2 openends, 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 respectively stop valve 9 and pressure transducer 10, 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, completes the little assembling to bogie tightness test system, after having assembled, confirm again that system pipeline connects correct, reliable.
Then, adjust altitude valve 12, outside pressure air pipeline is connected with stop valve 9, shutoff air spring 6 exhausr ports, open stop valve 9 inflates in air spring 6 again, air spring 6 expands gradually and highly increases, thereby drive bolster 5 to move upward with respect to spring tray 7, due to bolster 5, clamping plate 2, shrouding 4, the acting in conjunction of 1 deadweight of parts such as grade of suspension rod screw rod and the resistance of spring tray 7, cause air spring 6 air pressure inside 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, when if pressure transducer 10 readings reach air tightness test standard value, the air pressure of air spring 6 inside has also reached air tightness test standard value.The air tightness test standard value at this place is 0.4-0.7Mpa normally, and concrete value is different and variant according to the specification of air spring 6, and the value in the present embodiment is 0.6Mpa.When air spring 6 air pressure inside values reach 0.6Mpa, close stop valve 9, bogie tightness test system enters packing state.
Next, remain off valve 9 closed conditions, record pressure transducer 10 readings as air spring 6 internal gas pressure initial values, 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 conventionally, and concrete value is different and variant according to the specification 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 readings as air spring 6 internal gas pressure end values.
Finally, according to recorded air spring 6 internal gas pressure initial values, end value, calculate difference between the two, this difference is reduced to permissible value with the air pressure of setting and compare, thereby judge tightness test system, whether have leakage.The air pressure that this place sets reduces normally 8-12KPa of permissible value, and concrete value is different and variant according to the specification of air spring 6, and the value in the present embodiment is 10KPa.Particularly, if the difference of air spring 6 internal gas pressure initial values and end value is less than or equal to 10KPa, illustrate that bogie air tightness test is qualified; If the difference of air spring 6 internal gas pressure initial values and end value is greater than 10KPa, 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 again the common bogie tightness test system that forms of suspension rod screw rod 1 assembly, stop valve 9 and pressure transducer 10, 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 is to make air spring 6 inflations by passing into pressure air in the air spring 6 to this test macro, when the interior pressure of air spring 6 is elevated to testing standard value, stop inflation, according to the pressure drop low value recording in the dwell time, can judge whether to exist and leak, whether thereby it is qualified before the formal production and assembly of bogie, to test out its impermeability, avoided bogie to assemble afterwards because defective the caused reclamation work of impermeability, and this method of testing is safe and reliable, avoided conventional test methodologies to test site, equipment, the dependence of time, saved the assembling of bogie, test duration, improved production efficiency, be conducive to reduce 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 modifications of doing within the spirit and principles in the present invention, be equal to replacement and improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
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) is positioned between bolster (5) and spring tray (7) and is connected differential pressure valve (8) between air spring (6), described altitude valve (12) is connected and communicates with air spring (6), it is characterized in that: also comprise suspension rod screw rod (1) and stop valve (9), upper baffle plate (3) and the nut (11) of connecting of described suspension rod screw rod (1), 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 and communicates successively.
2. a kind of 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. according to a kind of speed-raising railroad coach bogie tightness test system described in claim 1 or 2, it is characterized in that: described tightness test system also comprises clamping plate (2) and shrouding (4), 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, offers first through hole (13) corresponding with the second through hole (14) on shrouding (4).
4. a kind of speed-raising railroad coach bogie tightness test system according to claim 3, it is characterized in that: the clamping plate in described tightness test system (2) are provided with two, and be channel-section steel, the bottom of each piece clamping plate (2) offers two the second through holes (14).
5. according to a kind of speed-raising railroad coach bogie tightness test system described in claim 1 or 2, it is characterized in that: described suspension rod screw rod (1) is provided with four, be distributed in (7) four jiaos of spring trays and form and be flexibly connected with spring tray (7).
6. 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:
The 1st step, the assembling of bogie tightness test system, and it is correct, reliable to confirm that system pipeline connects;
The 2nd step, inflation; Adjust 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);
The 3rd step, pressurize test; Remain off valve (9) closed condition, records air spring (6) internal gas pressure initial value, and the dwell time reaches after pressurize testing standard value, records air spring (6) internal gas pressure end value;
The 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 difference of air spring (6) internal gas pressure initial value and end value is less than or equal to the air pressure of setting, reduce permissible value, air tightness test is qualified;
(2) if the difference of air spring (6) internal gas pressure initial value and end value is greater than the air pressure of setting, reduce permissible value, air tightness test is defective.
7. the method for testing of a kind of railroad coach bogie tightness test system that raises speed according to claim 6, it 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, close stop valve (9).
8. the method for testing of a kind of railroad coach bogie tightness test system that raises speed according to claim 6, 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.
9. the method for testing of a kind of railroad coach bogie tightness test system that raises speed according to claim 6, is characterized in that: it is 8-12KPa that the air pressure of setting in described method of testing the 4th step reduces permissible value.
10. according to the method for testing of a kind of railroad coach bogie tightness test system that raises speed described in claim 6 or 7, it is characterized in that: described air spring (6) internal gas pressure value reads by pressure transducer (10), described pressure transducer (10) is connected between stop valve (9) and altitude valve (12).
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| 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 |
| CN112985707A (en) * | 2019-12-16 | 2021-06-18 | 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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|---|---|
| CN103674446B (en) | 2016-04-20 |
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