CN108007801A - A kind of vehicle gas cylinder fatigue experimental device and fatigue test method - Google Patents
A kind of vehicle gas cylinder fatigue experimental device and fatigue test method Download PDFInfo
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- CN108007801A CN108007801A CN201711261337.8A CN201711261337A CN108007801A CN 108007801 A CN108007801 A CN 108007801A CN 201711261337 A CN201711261337 A CN 201711261337A CN 108007801 A CN108007801 A CN 108007801A
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- gas cylinder
- hoop
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
- G01N3/36—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces generated by pneumatic or hydraulic means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0044—Pneumatic means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0073—Fatigue
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- Life Sciences & Earth Sciences (AREA)
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- General Health & Medical Sciences (AREA)
- Immunology (AREA)
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The present invention relates to a kind of vehicle gas cylinder fatigue experimental device and fatigue test method, belong to vehicle gas cylinder safe handling field, present invention research vehicle gas cylinder is in internal gas pressure and the exterior fatigue test pricked under hoop constraint, verify that it bears the ability of fatigue load in use, and the restraining force for calculating gas cylinder and pricking hoop is derived according to vehicle motion parameters, a kind of fatigue experimental device is designed according to above-mentioned test objective, the device can make gas cylinder complete fatigue test under the collective effect of above two power, and the size and location for pricking hoop restraining force can be adjusted, and the device can adjust gas cylinder according to the gas cylinder of different model and prick hoop, it can not only be used for the use of vehicle gas cylinder fatigue test board, also the stent on automobile as fixed gas cylinder can be installed on to use.
Description
Technical field
The present invention relates to vehicle gas cylinder technology for safely applying field, and it is gentle especially to emphasize that gas cylinder bears gas cylinder internal pressure at the same time
Bottle pricks the fatigue test method under hoop restraining force collective effect, and gas cylinder fatigue test dress is designed according to test method requirement
Put.
Background technology
During gas cylinder use, the restraining force F stents of gas cylinder are fixed on automobile by gas support, F stents it is big
It is small to allow for bearing inertia force of the automobile in the centrifugal force that starting acceleration, brake deceleration, turning produce even collision process
Effect, this requires F stents are sufficiently large.While F stents are sufficiently large, gas cylinder can be made to produce outer buckling the active force of gas cylinder
Shape, and the collective effect of gas cylinder internal gas make gas cylinder produce fatigue damage in gas cylinder.
At present, vehicle compressed natural gas cylinder fatigue test, fatigue test is only carried out under the action of gas cylinder internal pressure, is not had
Play the role of considering the compression that the stent of fixed gas cylinder produces gas cylinder, force-bearing situation and the actual loading shape of fatigue test
Condition is different, is not enough to prove the fatigue strength of gas cylinder.
The content of the invention
The purpose of the invention is to overcome the deficiencies of the prior art and provide a kind of vehicle gas cylinder fatigue experimental device and
Fatigue test method.
The present invention is to be achieved through the following technical solutions：
A kind of vehicle gas cylinder fatigue test method, comprises the following steps：
S1, the compressed natural gas used as vehicle fuel bottle for selecting model CNG2-G-356-75-20B, a diameter of 40mm, barrel lenght
For 70mm, the car mass installed is 1400kg, and maximal rate during turning is 8.3m/s, min. turning radius 10m, gas
The gross weight of bottle and gas is 50kg, and the centrifugal force that can obtain fully loaded gas cylinder is
FTurn=mBottlev2 Turn/r
F can be obtained after above-mentioned numerical value is substituted intoTurn=344N
Gas cylinder prick bind round restraining force under skid-resistant power be
f×FContact≥FTurn
Gas cylinder and the friction coefficient pricked between hoop are 0.5, then gas cylinder is pricked to bind round is to the restraining force of gas cylinder
FContact=688N,
It is thus determined that it is 688N to the restraining force of gas cylinder that position T points gas cylinder, which pricks hoop, on gas cylinder；
The gas cylinder (empty bottle) of model CNG2-G-356-75-20B, be installed on and prick in hoop by S2；
S3, the length for setting gas cylinder cylinder (being free of both ends end socket) adjust left and right two distances for pricking hoop, make each as L
Support hoop center line is 14mm (L/5, L are the length of vehicle gas cylinder cylinder) apart from gas cylinder straight barrel end, according to pressure sensor
The numerical value of display, will prick hoop and is adjusted to 688N to the restraining force of gas cylinder, and left and right hoop width of pricking is 30mm, contact area
0.007536m2；
S4, incipient stage, are fixed gas cylinder with the left and right hoop of pricking of gas cylinder, the power suffered by T points comes from bundle hoop to gas cylinder unit
The size of area force P is 0.91MPa, and direction is inside perpendicular to the surface of gas cylinder；
When starting to fill gas in S5, gas cylinder, the pressure in gas cylinder gradually rises, and gas acts on the power on gas cylinder in bottle
The direction of Q is outside perpendicular to the surface of gas cylinder, and it is opposite to prick the power bound round and acted on gas cylinder with gas cylinder；When the pressure in gas cylinder reaches
During 0.91MPa, the two equal in magnitude, direction is on the contrary, T points reach the balance of power；
When S6, gas pressure of the inside of a bottle continue rise, Q>It is outside perpendicular to the surface of gas cylinder suffered by T points during P；When reaching most
During high pressure 20MPa, Q=19.09MPa；
S7, start to discharge the pressure in gas cylinder, and when gas pressure of the inside of a bottle is down to 0.91MPa, the two is equal in magnitude, direction phase
Instead, the balance of power is reached；
S8, continue to discharge the pressure in gas cylinder, when gas pressure of the inside of a bottle is down to 0.1MPa, Q=0.1MPa, P=
Inside perpendicular to the surface of gas cylinder suffered by 0.91MPa, T point, size 0.9MPa, so far completes one cycle；
S9, continue to fill gas, continues according to the order of S5-S8；According to national standard for vehicle gas cylinder safety
Property requirement, complete 15000 times circulation not explosion for qualification.
A kind of vehicle gas cylinder fatigue experimental device, including the first sliding groove, the second sliding slot, first the second telescopic rod of telescopic rod,
Left to prick hoop, right bundle hoop, upper bundle hoop, lower bundle hoop, fastening bolt, pressure sensor, gasket, leg, the left bundle hoop is bound round with right prick
Lower end both sides are equipped with leg, and first telescopic rod and the second telescopic rod can be according to gas cylinder diameter adjustment length, the lower bundles
For flexible spring tape, it can combine closely in gas cylinder diameter change with gas cylinder circumferential direction for hoop and upper hoop of pricking, it is described it is upper prick hoop and and
Linked together between lower bundle hoop by fastening bolt, the pretightning force of the measurable fastening bolt of pressure sensor, the pad
Piece can adapt to the fine setting of fastening bolt pretightning force, and the left leg for pricking hoop can horizontally slip in the first sliding groove, the right side
Pricking the leg of hoop can horizontally slip in the second sliding slot, its adjustable left bundle hoop and the right spacing pricked between hoop, when gas cylinder diameter
When changing greatly, the bundle hoop for the length that is consistent with gas cylinder diameter should be selected.
Compared with prior art, the beneficial effects of the invention are as follows：The present invention considers the pressure of gas cylinder internal gas at the same time
Gas support when pricking the influence of hoop restraining force two kinds of power synergistic effect with gas cylinder, and fatigue test is determined according to motor racing rule
The size of external force, determines that stent acts on the optimum position of gas cylinder according to mechanical knowledge；The device can be in above two power
Fatigue test is carried out under collective effect, and the size and application position of poppet pressure can be adjusted；And the device can be according to gas cylinder
The width of the different adjustment stent of diameter, can adjust the position that gas cylinder pricks hoop according to the gas cylinder of different length, which both may be used
To be used in gas cylinder fatigue test as fatigue test board, it can also be installed on the stent on automobile as fixed gas cylinder and use.
Brief description of the drawings
Fig. 1 is the stressing conditions schematic diagram that hoop and gas cylinder contact position (T points on gas cylinder) are pricked in the embodiment of the present invention；
Fig. 2 is the top view of vehicle gas cylinder fatigue experimental device in the embodiment of the present invention；
Fig. 3 is the bearing front view of vehicle gas cylinder fatigue experimental device in the embodiment of the present invention；
Fig. 4 is the left view of vehicle gas cylinder fatigue experimental device in the embodiment of the present invention；
Fig. 5 is the partial enlarged view in Fig. 4；
Fig. 6 is stress diagram when vehicle gas cylinder is only by gas support external pressure F stents in the embodiment of the present invention；
Fig. 7 is the stressing conditions of gas cylinder T points in the embodiment of the present invention.
In figure：1st, the first sliding groove, the 2, second sliding slot, the 3, first telescopic rod, the 4, second telescopic rod, 5, it is left prick hoop, 6, right bundle
Hoop, 7, fastening bolt, 8, pressure sensor, 9, gasket, 10, it is lower prick hoop, 11, it is upper prick hoop, 12, leg.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, it is right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
A kind of vehicle gas cylinder fatigue test method, comprises the following steps：
S1, the compressed natural gas used as vehicle fuel bottle for selecting model CNG2-G-356-75-20B, a diameter of 40mm, barrel lenght
For 70mm, the car mass installed is 1400kg, and maximal rate during turning is 8.3m/s, min. turning radius 10m, gas
The gross weight of bottle and gas is 50kg, and the centrifugal force that can obtain fully loaded gas cylinder is
FTurn=mBottlev2 Turn/r
F can be obtained after above-mentioned numerical value is substituted intoTurn=344N
Gas cylinder prick bind round restraining force under skid-resistant power be
f×FContact≥FTurn
Gas cylinder and the friction coefficient pricked between hoop are 0.5, then gas cylinder is pricked to bind round is to the restraining force of gas cylinder
FContact=688N,
It is thus determined that it is 688N to the restraining force of gas cylinder that position T points gas cylinder, which pricks hoop, on gas cylinder, as shown in Figure 1；
The gas cylinder (empty bottle) of model CNG2-G-356-75-20B, be installed on and prick in hoop by S2, such as Fig. 2, Fig. 3, Fig. 4 and
Shown in Fig. 5；
S3, the length for setting gas cylinder cylinder (being free of both ends end socket) adjust left and right two distances for pricking hoop, make each as L
Support hoop center line is 14mm (L/5, L are the length of vehicle gas cylinder cylinder) apart from gas cylinder straight barrel end, according to pressure sensor
The numerical value of display, will prick hoop and is adjusted to 688N to the restraining force of gas cylinder, and left and right hoop width of pricking is 30mm, contact area
0.007536m2, as shown in Figure 6；
S4, incipient stage, are fixed gas cylinder with the left and right hoop of pricking of gas cylinder, the power suffered by T points comes from bundle hoop to gas cylinder unit
The size of area force P is 0.91MPa, and direction is inside perpendicular to the surface of gas cylinder；
When starting to fill gas in S5, gas cylinder, the pressure in gas cylinder gradually rises, and gas acts on the power on gas cylinder in bottle
The direction of Q is outside perpendicular to the surface of gas cylinder, and it is opposite to prick the power bound round and acted on gas cylinder with gas cylinder；When the pressure in gas cylinder reaches
During 0.91MPa, the two equal in magnitude, direction is on the contrary, T points reach the balance of power；
When S6, gas pressure of the inside of a bottle continue rise, Q>It is outside perpendicular to the surface of gas cylinder suffered by T points during P；When reaching most
During high pressure 20MPa, Q=19.09MPa；
S7, start to discharge the pressure in gas cylinder, and when gas pressure of the inside of a bottle is down to 0.91MPa, the two is equal in magnitude, direction phase
Instead, the balance of power is reached；
S8, continue to discharge the pressure in gas cylinder, when gas pressure of the inside of a bottle is down to 0.1MPa, Q=0.1MPa, P=
Inside perpendicular to the surface of gas cylinder suffered by 0.91MPa, T point, size 0.9MPa, so far completes one cycle, such as Fig. 7 institutes
Show；
S9, continue to fill gas, continues according to the order of S5-S8；According to national standard for vehicle gas cylinder safety
Property requirement, complete 15000 times circulation not explosion for qualification.
A kind of vehicle gas cylinder fatigue experimental device, including the first sliding groove 1, the second sliding slot 2, the first telescopic rod 3 second are flexible
Bar 4, left bundle hoop 5, right bundle hoop 6, upper bundle bind round 11, lower prick and bind round 10, fastening bolt 7, pressure sensor 8, gasket 9, leg 12, described
Left bundle hoop 5 and right 6 lower end both sides of hoop of pricking are equipped with leg 12, and 3 and second telescopic rod 4 of the first telescopic rod can be straight according to gas cylinder
Footpath adjustment length, for lower hoop 10 and the upper hoop 11 of pricking pricked for flexible spring tape, it can be circumferential with gas cylinder in gas cylinder diameter change
Combine closely, upper prick between hoop and 11 and lower bundle hoop 10 is linked together by fastening bolt 7, the pressure sensor 8
The pretightning force of measurable fastening bolt 7, the gasket 9 can adapt to the fine setting of 7 pretightning force of fastening bolt, and left prick binds round 5
Leg can horizontally slip in the first sliding groove 1, and the right leg for pricking hoop can horizontally slip in the second sliding slot 2, it is adjustable
It is left to prick hoop 5 and the right spacing pricked between hoop 6, when gas cylinder diameter change is larger, the length that is consistent with gas cylinder diameter should be selected
Prick hoop.
The present invention considers that the pressure of gas cylinder internal gas and gas cylinder prick the influence of two kinds of power synergistic effects of hoop restraining force at the same time,
And when determining fatigue test according to motor racing rule gas support external force size, determine that stent acts on according to mechanical knowledge
The optimum position of gas cylinder；The device can carry out fatigue test under the collective effect of above two power, and can adjust stent pressure
The size and application position of power；, can be according to difference and the device can be according to the width of the different adjustment stent of gas cylinder diameter
The gas cylinder of length adjusts the position that gas cylinder pricks hoop, which can both use in gas cylinder fatigue test as fatigue test board,
The stent on automobile as fixed gas cylinder can be installed on to use.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement made within refreshing and principle etc., should all be included in the protection scope of the present invention.
Claims (3)
1. a kind of vehicle gas cylinder fatigue test method, it is characterised in that comprise the following steps：
S1, the compressed natural gas used as vehicle fuel bottle for selecting model CNG2-G-356-75-20B, a diameter of 40mm, barrel lenght are
70mm, the car mass installed are 1400kg, and maximal rate during turning is 8.3m/s, min. turning radius 10m, gas cylinder
Gross weight with gas is 50kg, and the centrifugal force that can obtain fully loaded gas cylinder is
FTurn=mBottlev2 Turn/r
F can be obtained after above-mentioned numerical value is substituted intoTurn=344N
Gas cylinder prick bind round restraining force under skid-resistant power be
f×FContact≥FTurn
Gas cylinder and the friction coefficient pricked between hoop are 0.5, then gas cylinder is pricked to bind round is to the restraining force of gas cylinder
FContact=688N,
It is thus determined that it is 688N to the restraining force of gas cylinder that position T points gas cylinder, which pricks hoop, on gas cylinder；
The gas cylinder (empty bottle) of model CNG2-G-356-75-20B, be installed on and prick in hoop by S2；
S3, the length for setting gas cylinder cylinder (being free of both ends end socket) adjust left and right two distances for pricking hoop as L, make each support hoop
Center line is 14mm (L/5, L are the length of vehicle gas cylinder cylinder) apart from gas cylinder straight barrel end, is shown according to pressure sensor
Numerical value, hoop will be pricked and be adjusted to 688N to the restraining force of gas cylinder, left and right hoop width of pricking is 30mm, contact area
0.007536m2；
S4, incipient stage, are fixed gas cylinder with the left and right hoop of pricking of gas cylinder, the power suffered by T points comes from bundle hoop to gas cylinder unit area
The size of force P is 0.91MPa, and direction is inside perpendicular to the surface of gas cylinder；
When starting to fill gas in S5, gas cylinder, the pressure in gas cylinder gradually rises, and gas acts on the power Q's on gas cylinder in bottle
Direction is outside perpendicular to the surface of gas cylinder, and it is opposite to prick the power bound round and acted on gas cylinder with gas cylinder；When the pressure in gas cylinder reaches
During 0.91MPa, the two equal in magnitude, direction is on the contrary, T points reach the balance of power；
When S6, gas pressure of the inside of a bottle continue rise, Q>It is outside perpendicular to the surface of gas cylinder suffered by T points during P；When reaching maximal pressure
During power 20MPa, Q=19.09MPa；
S7, start discharge gas cylinder in pressure, when gas pressure of the inside of a bottle is down to 0.91MPa, the two equal in magnitude, direction on the contrary,
Reach the balance of power；
S8, continue to discharge the pressure in gas cylinder, when gas pressure of the inside of a bottle is down to 0.1MPa, Q=0.1MPa, P=0.91MPa, and T points
Suffered is inside perpendicular to the surface of gas cylinder, and size 0.9MPa, so far completes one cycle；
S9, continue to fill gas, continues according to the order of S5-S8；According to national standard for vehicle gas cylinder security
It is required that 15000 circulation not explosions are completed as qualification.
A kind of 2. vehicle gas cylinder fatigue experimental device, it is characterised in that：Stretched including the first sliding groove (1), the second sliding slot (2), first
(3) second telescopic rod (4) of contracting bar, it is left prick hoop (5), it is right prick hoop (6), it is upper prick hoop (11), it is lower prick hoop (10), fastening bolt (7), pressure
Force snesor (8), gasket (9), leg (12), the left bundle hoop (5) and right hoop (6) lower end both sides of pricking are equipped with leg (12), institute
(10) and upper bundle hoop can be bound round according to gas cylinder diameter adjustment length, lower prick by stating the first telescopic rod (3) and the second telescopic rod (4)
(11) be flexible spring tape, it can combine closely in gas cylinder diameter change with gas cylinder circumferential direction, it is described it is upper prick hoop and (11) and under
Prick hoop (10) between linked together by fastening bolt (7), the measurable fastening bolt of the pressure sensor (8) (7) it is pre-
Clamp force, the left leg for pricking hoop (5) can horizontally slip in the first sliding groove (1), and the right leg for pricking hoop (6) can be second
Horizontally slip in sliding slot (2).
3. a kind of vehicle gas cylinder fatigue experimental device according to claim 1 or 2 and fatigue test method, its feature exist
In：It can be used in gas cylinder fatigue test as fatigue test board, and can also be installed on the stent on automobile as fixed gas cylinder makes
With.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711261337.8A CN108007801B (en) | 2017-12-04 | 2017-12-04 | Vehicle gas cylinder fatigue test device and fatigue test method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711261337.8A CN108007801B (en) | 2017-12-04 | 2017-12-04 | Vehicle gas cylinder fatigue test device and fatigue test method |
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| Publication Number | Publication Date |
|---|---|
| CN108007801A true CN108007801A (en) | 2018-05-08 |
| CN108007801B CN108007801B (en) | 2020-12-18 |
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| Application Number | Title | Priority Date | Filing Date |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113239456A (en) * | 2021-04-16 | 2021-08-10 | 中国第一汽车股份有限公司 | Design method for fastening load of fuel bottle of passenger vehicle |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113239456A (en) * | 2021-04-16 | 2021-08-10 | 中国第一汽车股份有限公司 | Design method for fastening load of fuel bottle of passenger vehicle |
| CN113239456B (en) * | 2021-04-16 | 2022-07-12 | 中国第一汽车股份有限公司 | Design method for fastening load of fuel bottle of passenger vehicle |
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| Publication number | Publication date |
|---|---|
| CN108007801B (en) | 2020-12-18 |
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Application publication date: 20180508 Assignee: Shandong zhengnuo Testing Co.,Ltd. Assignor: Yantai University Contract record no.: X2021980009126 Denomination of invention: A fatigue test device and fatigue test method for vehicle gas cylinder Granted publication date: 20201218 License type: Common License Record date: 20210909 |