CN106089867A - A kind of fuel tank of vehicle explosion pressure-resistant test system - Google Patents
A kind of fuel tank of vehicle explosion pressure-resistant test system Download PDFInfo
- Publication number
- CN106089867A CN106089867A CN201610485148.8A CN201610485148A CN106089867A CN 106089867 A CN106089867 A CN 106089867A CN 201610485148 A CN201610485148 A CN 201610485148A CN 106089867 A CN106089867 A CN 106089867A
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- Prior art keywords
- pressure
- fuel tank
- valve
- oil
- measured
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/08—Servomotor systems incorporating electrically operated control means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/08—Servomotor systems incorporating electrically operated control means
- F15B21/087—Control strategy, e.g. with block diagram
-
- 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
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/50—Pressure control
- F15B2211/505—Pressure control characterised by the type of pressure control means
-
- 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
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Fluid Mechanics (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- General Physics & Mathematics (AREA)
- Biochemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The invention discloses a kind of fuel tank of vehicle explosion pressure-resistant test system, including service tank, motor, pressure control variable pump, proportional pressure valve, check valve, overflow valve, unloading overflow valve, safety and stop valve group, accumulator, high pressure filter, high-pressure ball valve, low pressure ball valve, pressure measuring tie-in, Pressure gauge, pressure transducer, fuel tank to be measured, strain gauge, return filter.During present invention achieves fuel tank of vehicle explosion voltage-withstand test, the complicated alternation of test pressure dynamically adjusts, the most perfect available fuel tank of vehicle safety and reliability appraisement system；Additionally, the present invention uses variable pump remote pressure dynamically to control, gathering fuel tank of vehicle operating pressure and stress state, reflect the pressure performance of fuel tank of vehicle explosion, overall simple is reliable, practical, has good engineering promotional value.
Description
Technical field
The present invention relates to fuel tank of vehicle field tests, particularly to a kind of fuel tank of vehicle explosion pressure-resistant test system.
Background technology
Fuel tank, as the container of vehicle storage fuel, is key safety parts very important in automotive fuel oil system.
Along with the development and progress of automobile technology, fuel tank is designed to generally according to needs variously-shaped, maximally utilises vehicle body
Bottom space, and the design requirement of applicable automotive light weight technology.
China's automobile quantity and automobile driving speed are stepped up, and the research of fuel tank performance test apparatus becomes to be compeled at eyebrow
The task of eyelash.Along with stepping up of vehicle fuel feed system safety and reliability, then require fuel tank detecting system energy
Enough accurately and efficiently its performance is carried out system evaluation.Wherein, the weight during explosion voltage-withstand test is fuel tank performance test
Wanting link, the safety and reliability evaluation to fuel tank has important practical significance.
Explosion that traditional fuel tank of vehicle is pressure test application is high-pressure pump blasting gear, can only realize a kind of burst pressure
Force mode is tested, and meets Ou Si standard, it is difficult to realize complicated alternating pressure durability and destructive testing, it is difficult to preferably to instead
Reflect the pressure security performance of fuel tank.
Based on above-mentioned analysis, for complete detection fuel tank of vehicle pressure blasting work performance, need offer a kind of automobile combustion badly
Fuel tank explosion pressure-resistant test system.
Summary of the invention
For above-mentioned prior art defect, key issue to be solved by this invention is to provide a kind of fuel tank of vehicle explosion
Pressure-resistant test system, it is achieved the complete detection of blasting work performance that fuel tank of vehicle is pressure.
Realizing goal of the invention for solving above-mentioned technical problem, the present invention is achieved by the following technical solutions:
A kind of fuel tank of vehicle explosion pressure-resistant test system, including service tank 1, motor 2, pressure control variable pump 3, ratio
Example pressure valve 4, check valve 5, overflow valve 6, unloading overflow valve 7, safety and stop valve group 8, accumulator 9, high pressure filter 10, height
Pressure ball valve 11, low pressure ball valve 12, pressure measuring tie-in 13, Pressure gauge 14, pressure transducer 15, fuel tank to be measured 16, strain gauge 17,
Return filter 18.
Motor 2 is connected with pressure control variable pump 3 axis, provides power to input for fuel tank 16 to be measured；Pressure control variable
Pump 3 inlet port is connected with service tank 1, and the long-range pressure modulating opening of pressure control variable pump 3 is connected with proportional pressure valve 4 high-pressure mouth, than
Example pressure valve 4 low pressure port is connected to service tank 1 by after check valve 5；Pressure control variable pump 3 force feed mouth is divided into three tunnels, the
One road is connected to high pressure filter 10 oil-in, and the second road is connected to unloading overflow valve 7 oil-in, the 3rd road be connected to safety with
Stop valve group 8 oil-in；Safety is communicated to service tank 1 with stop valve group 8 drain tap together with unloading overflow valve 7 oil return opening；
Safety is connected with accumulator 9 force feed mouth with stop valve group 8 force feed mouth；High pressure filter 10 oil-out is connected to high-pressure ball valve 11 and enters
Hydraulic fluid port；High-pressure ball valve 11 oil-out is divided into three tunnels, and the first via is connected to fuel tank 16 to be measured and tests oil-in, and pressure measurement is passed through on the second tunnel
Joint 13 is connected to Pressure gauge 14, and the 3rd road is connected to pressure transducer 15；Strain gauge 17 is arranged on fuel tank 16 to be measured；Treat
Surveying fuel tank 16 drain tap and be connected to overflow valve 6 high-pressure mouth by low pressure ball valve 12, overflow valve 6 low pressure port passes through return filter 18
It is connected to service tank 1.
Described a kind of fuel tank of vehicle explosion pressure-resistant test system, to the pressure detection of fuel tank of vehicle explosion by control
Device processed connects host computer, and coupled system pressure transducer, strain gauge etc. realize.Further, controller output digital quantity control
Signal processed can realize the on off control of test system to motor 2；Controller output discrete control signal can to unloading overflow valve 7
Realize loading and the unloading control of system；Controller output Analog control signal can realize Stress control to proportional pressure valve 4
The long-range Regulation Control of variable pump 3, it is achieved system complex alternating pressure exports；Controller gathers high pressure filter 10 and oil return filter
Device 18 digital quantity alarm signal, is monitored system work oil cleanliness；Controller gathers pressure transducer 15 analog quantity
Signal, it is achieved fuel tank 16 to be measured tests the collection of pressure；Controller gathers strain gauge 17 analog signals, it is achieved oil to be measured
Case 16 strain and the collection of stress.
Owing to using technique scheme, the present invention compared with prior art has the advantages that
(1), during present invention achieves fuel tank of vehicle explosion voltage-withstand test, the complicated alternation of test pressure is dynamically adjusted
Whole, the most perfect available fuel tank of vehicle safety and reliability appraisement system.
(2) present invention uses variable pump remote pressure dynamically to control, and gathers fuel tank of vehicle operating pressure and stress state,
The reflection pressure performance of fuel tank of vehicle explosion, overall simple is reliable, practical, has good engineering promotional value.
Accompanying drawing explanation
Fig. 1 represents the Hydraulic System Principle of the present invention；
Fig. 2 represents the electrical system acquisition controlling figure of the present invention；
Fig. 3 represents the workflow diagram of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawings the present invention is described in further detail:
A kind of fuel tank of vehicle explosion pressure-resistant test system, as it is shown in figure 1, it includes service tank 1, motor 2, pressure
Control variable pump 3, proportional pressure valve 4, check valve 5, overflow valve 6, unloading overflow valve 7, safety and stop valve group 8, accumulator 9,
High pressure filter 10, high-pressure ball valve 11, low pressure ball valve 12, pressure measuring tie-in 13, Pressure gauge 14, pressure transducer 15, fuel tank to be measured
16, strain gauge 17, return filter 18.
Wherein: motor 2 is connected with pressure control variable pump 3 axis, power is provided to input for fuel tank 16 to be measured；Stress control
Variable pump 3 inlet port is connected with service tank 1, the long-range pressure modulating opening of pressure control variable pump 3 and proportional pressure valve 4 high-pressure mouth phase
Even, proportional pressure valve 4 low pressure port is connected to service tank 1 by after check valve 5；Pressure control variable pump 3 force feed mouth is divided into three
Road, the first via is connected to high pressure filter 10 oil-in, and the second road is connected to unloading overflow valve 7 oil-in, and the 3rd road is connected to
Safety and stop valve group 8 oil-in；Safety and stop valve group 8 drain tap are communicated to auxiliary together with unloading overflow valve 7 oil return opening
Fuel tank 1；Safety is connected with accumulator 9 force feed mouth with stop valve group 8 force feed mouth；High pressure filter 10 oil-out is connected to smash
Valve 11 oil-in；High-pressure ball valve 11 oil-out is divided into three tunnels, and the first via is connected to fuel tank 16 to be measured and tests oil-in, and the second tunnel leads to
Crossing pressure measuring tie-in 13 and be connected to Pressure gauge 14, the 3rd road is connected to pressure transducer 15；Stress sensing is arranged on fuel tank 16 to be measured
Device 17；Fuel tank 16 drain tap to be measured is connected to overflow valve 6 high-pressure mouth by low pressure ball valve 12, and overflow valve 6 low pressure port passes through oil return
Filter 18 is connected to service tank 1.
Fig. 2 represents the electrical system acquisition controlling figure of the present invention.
A kind of fuel tank of vehicle explosion pressure-resistant test system, the detection to fuel tank of vehicle explosion is pressure is connected by controller
Connecing host computer, coupled system pressure transducer, strain gauge etc. realize.Further, controller output discrete control signal
The on off control of test system can be realized to motor 2；Controller output discrete control signal can realize to unloading overflow valve 7
The loading of system and unloading control；Controller output Analog control signal can realize pressure control variable pump 3 to proportional pressure valve 4
Remotely Regulation Control, it is achieved system complex alternating pressure exports；Controller gathers high pressure filter 10 and return filter 18 number
Word amount alarm signal, is monitored system work oil cleanliness；Controller gathers pressure transducer 15 analog signals, real
Existing fuel tank 16 to be measured tests the collection of pressure；Controller gathers strain gauge 17 analog signals, it is achieved fuel tank 16 to be measured should
Become the collection with stress.
Fig. 3 represents the workflow diagram of the present invention.
The present invention is in implementation process, and first host computer starts program and system carries out Initialize installation, and controller exports
Discrete control signal enabling motor 2, next is opened high-pressure ball valve 11, closes low pressure ball valve 12, and incited somebody to action by overflow unloader 7
System is set to stress state, and then passing ratio pressure valve 4 carries out long-range Regulation Control to pressure control variable pump 3, it is achieved
The complicated alternation of fuel tank test pressure dynamically controls, and pressure transducer 15 and strain gauge 17 gather data simultaneously, and pass
It is passed to controller and carries out data storage, data acquisition detection work, by overflow unloader 7, system is adjusted after test process
It is set to unloading condition, and opens low pressure ball valve 12, fuel tank 16 mesohigh oil to be measured is carried out off-load oil return, completes integrated testability,
It is prepared to enter into subsequent work circulation.
Protection scope of the present invention is defined by the claims.Those skilled in the art can be the essence of the present invention and guarantor
In the range of protecting, the present invention making various amendment or equivalent, this amendment or equivalent also should be regarded as in the present invention
Protection domain in.
Claims (1)
1. a fuel tank of vehicle explosion pressure-resistant test system, it is characterised in that: it includes service tank (1), motor (2), pressure
Power control variable pump (3), proportional pressure valve (4), check valve (5), overflow valve (6), unloading overflow valve (7), safety and stop valve
Group (8), accumulator (9), high pressure filter (10), high-pressure ball valve (11), low pressure ball valve (12), pressure measuring tie-in (13), Pressure gauge
(14), pressure transducer (15), fuel tank to be measured (16), strain gauge (17), return filter (18)；
Wherein, motor (2) is connected with pressure control variable pump (3) axis, provides power input for fuel tank to be measured (16)；Pressure control
Variable pump processed (3) inlet port is connected with service tank (1), pressure control variable pump (3) remotely pressure modulating opening and proportional pressure valve (4)
High-pressure mouth is connected, and proportional pressure valve (4) low pressure port is connected to service tank (1) by after check valve (5)；Pressure control variable pump
(3) force feed mouth is divided into three tunnels, and the first via is connected to high pressure filter (10) oil-in, and the second road is connected to unloading overflow valve (7)
Oil-in, the 3rd road is connected to safety and stop valve group (8) oil-in；Safety and stop valve group (8) drain tap and off-load overflow
Valve (7) oil return opening is communicated to service tank (1) together；Safety and stop valve group (8) force feed mouth and accumulator (9) force feed mouth phase
Even；High pressure filter (10) oil-out is connected to high-pressure ball valve (11) oil-in；High-pressure ball valve (11) oil-out is divided into three tunnels, the
One road is connected to fuel tank to be measured (16) test oil-in, and the second tunnel is connected to Pressure gauge (14) by pressure measuring tie-in (13), and the 3rd
Road is connected to pressure transducer (15)；Strain gauge (17) is arranged on fuel tank to be measured (16)；Fuel tank to be measured (16) drain tap leads to
Too low pressure ball valve (12) is connected to overflow valve (6) high-pressure mouth, and overflow valve (6) low pressure port is connected to auxiliary by return filter (18)
Help fuel tank (1)；
A kind of fuel tank of vehicle explosion pressure-resistant test system, the detection to fuel tank of vehicle explosion is pressure is connected by controller
Position machine, coupled system pressure transducer, strain gauge etc. realize；
Controller output discrete control signal can realize the on off control of test system to motor (2)；Controller output numeral
Amount control signal is to the loading of unloading overflow valve (7) feasible system and unloading control；Controller output Analog control signal
Pressure control variable pump (3) remotely Regulation Control can be realized, it is achieved system complex alternating pressure exports to proportional pressure valve (4)；
Controller gathers high pressure filter (10) and return filter (18) digital quantity alarm signal, enters system work oil cleanliness
Row monitoring；Controller gathers pressure transducer (15) analog signals, it is achieved the collection of fuel tank to be measured (16) test pressure；Control
Device gathers strain gauge (17) analog signals, it is achieved fuel tank to be measured (16) strain and the collection of stress.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610485148.8A CN106089867A (en) | 2016-06-29 | 2016-06-29 | A kind of fuel tank of vehicle explosion pressure-resistant test system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610485148.8A CN106089867A (en) | 2016-06-29 | 2016-06-29 | A kind of fuel tank of vehicle explosion pressure-resistant test system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106089867A true CN106089867A (en) | 2016-11-09 |
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ID=57213812
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610485148.8A Pending CN106089867A (en) | 2016-06-29 | 2016-06-29 | A kind of fuel tank of vehicle explosion pressure-resistant test system |
Country Status (1)
| Country | Link |
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| CN (1) | CN106089867A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112229729A (en) * | 2020-09-21 | 2021-01-15 | 广东海德利森一氢科技有限公司 | Material performance test equipment |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1587972A (en) * | 2004-08-03 | 2005-03-02 | 大连理工大学 | Hydraulic fatigue test system for pressure container |
| CN101082544A (en) * | 2006-05-31 | 2007-12-05 | 空中客车德国有限公司 | Device and method for testing airplane tank system |
| CN101498636A (en) * | 2009-01-16 | 2009-08-05 | 大连理工大学 | Inspection apparatus and method for multifunctional pressure container |
| CN202165337U (en) * | 2011-06-10 | 2012-03-14 | 韦汉珍 | Hydraulic power system of energy-saving servo variable pump |
| CN202203216U (en) * | 2011-08-28 | 2012-04-25 | 武汉威明德科技发展有限公司 | Automatic electrohydraulic proportional control test system of accumulator |
| CN202793950U (en) * | 2012-04-13 | 2013-03-13 | 深圳市亿威仕流体控制有限公司 | Air-conditioning compressor shell service life test bed device |
| CN103808569A (en) * | 2014-01-26 | 2014-05-21 | 合肥通用机械研究院 | High-pressure fatigue test device and test method |
| CN104142269A (en) * | 2013-05-07 | 2014-11-12 | 常州进出口工业及消费品安全检测中心 | Packing barrel water pressure tester |
-
2016
- 2016-06-29 CN CN201610485148.8A patent/CN106089867A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1587972A (en) * | 2004-08-03 | 2005-03-02 | 大连理工大学 | Hydraulic fatigue test system for pressure container |
| CN101082544A (en) * | 2006-05-31 | 2007-12-05 | 空中客车德国有限公司 | Device and method for testing airplane tank system |
| CN101498636A (en) * | 2009-01-16 | 2009-08-05 | 大连理工大学 | Inspection apparatus and method for multifunctional pressure container |
| CN202165337U (en) * | 2011-06-10 | 2012-03-14 | 韦汉珍 | Hydraulic power system of energy-saving servo variable pump |
| CN202203216U (en) * | 2011-08-28 | 2012-04-25 | 武汉威明德科技发展有限公司 | Automatic electrohydraulic proportional control test system of accumulator |
| CN202793950U (en) * | 2012-04-13 | 2013-03-13 | 深圳市亿威仕流体控制有限公司 | Air-conditioning compressor shell service life test bed device |
| CN104142269A (en) * | 2013-05-07 | 2014-11-12 | 常州进出口工业及消费品安全检测中心 | Packing barrel water pressure tester |
| CN103808569A (en) * | 2014-01-26 | 2014-05-21 | 合肥通用机械研究院 | High-pressure fatigue test device and test method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112229729A (en) * | 2020-09-21 | 2021-01-15 | 广东海德利森一氢科技有限公司 | Material performance test equipment |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20161109 |
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