CN102297754B - Test apparatus for fatigue of spring under continuous impact of high pressure gas - Google Patents

Test apparatus for fatigue of spring under continuous impact of high pressure gas Download PDF

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Publication number
CN102297754B
CN102297754B CN 201110130887 CN201110130887A CN102297754B CN 102297754 B CN102297754 B CN 102297754B CN 201110130887 CN201110130887 CN 201110130887 CN 201110130887 A CN201110130887 A CN 201110130887A CN 102297754 B CN102297754 B CN 102297754B
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China
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spring
diameter
long
big
test
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CN 201110130887
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Chinese (zh)
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CN102297754A (en
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周杰
张明明
王时龙
田波
康玲
赵昱
李小勇
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重庆大学
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Abstract

The invention relates to a test apparatus for fatigue of a spring under continuous impact of high pressure gas, more particularly to a test apparatus for fatigue life of a cylindrical helical spring. The apparatus comprises a high pressure gas dynamic portion, an electrical control portion and a mechanical portion. According to the invention, the apparatus has advantages of simple structure and easy operation; besides, stable impact loads can be continuously put on a testing spring and precision of detection on fatigue life of a spring is high. The apparatus provided in the invention can be widely applied to a test on fatigue life of a cylindrical helical spring that bears a high-speed, high-frequency and high-load impact load, especially to a test on fatigue life of a stranded-wire helical spring.

Description

The spring fatigue test device of gases at high pressure bump
Technical field
The invention belongs to the test unit technical field of mechanical component, be specifically related to the fatigue life test device of cylindrically coiled spring.
Background technology
Cylindrically coiled spring is a kind of mechanical component that utilize elasticity to come work, impacts or shakes, stores up the size of energy, ergometry etc. in order to motion, the mitigation of control parts, has in industrial products and daily life quite widely and uses.Cylindrically coiled spring mainly bears load at work as flexible member, and its load capacity and fatigue resistance directly influence the performance of product.All springs that bears variable load are delivered for a check enterprises quality control, user, new product typing evaluation, authentication, industry sampling observation and technology are adjusted in the link, must carry out fatigue behaviour and detect.The cylindrically coiled spring that on some important equipments, uses particularly, to bear the shock load of high-speed, high-frequency and high capacity in the course of the work, this impact energy that is added in suddenly on the spring makes the distortion of spring coil and stress distribution very inhomogeneous, and is stressed very complicated.And this class spring effect in mechanized equipment is extremely important, often determines the overall performance of mechanized equipment.Therefore, be the reliability of raising spring work and the combination property of engineering goods, a kind of simple, economic, suitable spring repeated impact test device of necessary development, the actual condition of simulation spring, the more accurately fatigue lifetime of detection springs.
Have the detection springs test unit of fatigue lifetime now, as the number of applying for a patent is 201010510405.1 " spring fatigue test device ", mainly comprise pneumatic mechanism, anchor clamps base plate, down location-plate, go up location-plate and the spring sheet-holder that is used for fixing tested spring on the location-plate down.This spring sheet-holder has a plurality of, but a plurality of tested springs of clamping.The piston rod end of the cylinder of pneumatic mechanism is connected with top board, top board motion compresses spring, and the motion of piston rod and top board by the PLC control cylinder, thus realize length of spring compressed is carried out torture test.The major defect of this device is: cylinder operation speed is subjected to the restriction of load, when many springs are carried out torture test, can not produce the impulsive force of high-speed, high-frequency and high capacity to every spring; Movement of springs is subjected to the restriction of piston rod movement simultaneously, can not produce shock load to test spring, can not simulate the deformation process of spring under the impact condition truly.
Summary of the invention
The objective of the invention is deficiency at existing check spring fatigue life test device, a kind of spring fatigue test device of gases at high pressure bump is provided, this device has cheap, working stability, can simulate that spring is subjected at a high speed, the environment of high-frequency and high capacity impact shock operating mode, and can accurately detect the characteristics of the fatigue lifetime of the spring that is subjected to bump.
The technical scheme that realizes the object of the invention is: a kind of spring fatigue test device of gases at high pressure bump mainly comprises gases at high pressure power section, electric control system and mechanical part.It is characterized in that:
Described gases at high pressure power section mainly is made up of air compressor, gas-holder and pneumatic triple piece (being air strainer, reduction valve and oil sprayer) three parts.Described air compressor is communicated with gas-holder by tracheae, stores in order to being delivered in the gas-holder by the gases at high pressure that air compressor compresses, and realizes air feed and with the balance of gas, for apparatus of the present invention provide continuous and stable power.Described gas-holder passes through pneumatic triple piece (being air strainer, reduction valve and oil sprayer) successively by tracheae and is communicated with the inlet end of the solenoid directional control valve of electric control system, and the endpiece of described solenoid directional control valve is connected by the inlet end of tracheae with the pipe connections of mechanical part.Because the filtration and the pressure regulation effect of pneumatic triple piece, quality is good, the gases at high pressure power of constant pressure for mechanical part provides.
Described electric control system mainly is made up of correlation sensor, reflection sensor, hand push button, solenoid directional control valve, PLC controller and PC etc.Described correlation sensor is installed in the place, hole on the developmental tube that is positioned at test spring free end position, the correlation sensor is connected by the input port of signal wire with the PLC controller, and the position signalling (signal 1) when mass is contacted with test spring flows to the PLC controller.Described reflection sensor is installed in the place, hole on the developmental tube that is positioned at auxiliary spring free end position, reflection sensor is connected by the input port of signal wire with the PLC controller, and the position signalling (signal 2) when mass is contacted with auxiliary spring flows to the PLC controller.Described hand push button is connected by the input port of signal wire with the PLC controller, in order to hand push button connection signal (being signal 3) is flowed to the PLC controller.The output port of described PLC controller is connected by the input port of signal wire with the electromagnet of solenoid directional control valve.The PLC controller receive the correlation sensor to the position signalling (signal 1) of mass when contacting with test spring when contacting with auxiliary spring with the detected mass of reflection sensor position signalling (signal 2) and the connection signal (signal 3) of hand push button, under the control of described PLC controller, the break-make of described solenoid directional control valve is controlled.Wherein: when signal 1 input, solenoid directional control valve disconnects; When signal 2 inputs, by the PLC rolling counters forward, solenoid directional control valve is just connected when the 2nd input signal 2; During signal 3 inputs, solenoid directional control valve is connected, and when signal 3 disconnected, solenoid directional control valve disconnected.Thereby realize of the input of control gases at high pressure, and then the control of quality piece is to the impact of test spring to mechanical part.Described PC is connected with described PLC controller by the serial communication line, carry out information interaction and demonstration, communicating to connect of PC and PLC controller not only flows to control program the PLC controller, and the suffered frequency of impact of the test spring that collects will test the time and impact number of times and be presented on the screen, be convenient to real-time monitoring, good man computer interface is provided test.
Described mechanical part mainly is made up of spring reference column, register pin, backing pin, developmental tube, mass, pipe connections, bolt, nut and base etc.Described developmental tube is that 1000~3000mm, internal diameter are that 15~70mm, wall thickness are that 2~8mm, material are stainless round tube for length, is fixed on the base, in order to guarantee that apparatus of the present invention keep in test stable.End at described developmental tube is provided with pipe connections.Described pipe connections is the round tube that an end is big, an end is little.The small end of described pipe connections is provided with the round tube of pipe thread for long 20~60mm, external diameter 25~80mm, wall thickness 2~8mm, outer wall, described small end is connected by the high-pressure air pipe of pipe thread with the solenoid directional control valve output terminal of aforementioned electric control system, in order to gases at high pressure with aforesaid gases at high pressure power section, send in the described developmental tube through the solenoid directional control valve of aforementioned electric control system, carry out the power of impulse test as test spring.The big end of described pipe connections is the external diameter coupling of long 25~100mm, wall thickness 2~8mm, internal diameter and described developmental tube, the round tube that inwall has boss.Boss place in described big end is provided with the air admission hole that diameter is 8-50mm.Described big end suit is welded on the outside surface of described developmental tube one end.Auxiliary spring is placed on the end in the described developmental tube and is positioned at the air inlet position of the big end inner convex platform of described pipe connections, by the boss in screw bolt and nut and the big end of described pipe connections one end of auxiliary spring is fixed.In described developmental tube and the free end that is positioned at auxiliary spring place a mass.Described mass is the stainless steel right cylinder of the internal diameter coupling of long 50~200mm, diameter and described developmental tube.When gases at high pressure are imported developmental tube by air admission hole, promote mass impulse test spring left.In the other end of described developmental tube, be provided with the spring reference column.Described spring reference column is the multidiameter that an end is big, an end is little.The big end of described spring reference column mates and is provided with the right cylinder of dowel hole for the internal diameter of long 40~130mm, diameter and described developmental tube.The small end of described spring reference column is the right cylinder of the internal diameter coupling of long 15~40mm, diameter and test spring, and described small end is provided with the tapped through hole that diameter is 4~10mm.Test spring is sleeved on the small end of described spring reference column, and in the tapped through hole by threaded backing pin screw-in small end an end of test spring is fixed.Described spring reference column is placed in the other end of described developmental tube, inserts by register pin in the dowel hole of the big end of described spring reference column, and described spring reference column is fixed on the described developmental tube.On described developmental tube and correspond respectively to the free end of test spring and auxiliary spring, the hole that one diameter is 8~12mm is set respectively, be used for installing correlation sensor and reflection sensor respectively, and the position signalling when detecting described mass respectively and contacting with auxiliary spring with test spring.On described developmental tube and corresponding to the test spring place bleeder port that 3~6 diameters evenly are set is 8~12mm.
The process of the test of apparatus of the present invention is as follows:
At first, be apparatus of the present invention energized, the pressurized air that air compressor work produces enters in the gas-holder and stores, and the control program in the PC passes in the PLC controller in the mode of serial communication.When the gas in the gas-holder surpasses test desired gas pressure, test spring is carried out repeated impact test.
After pressing hand push button, signal 3 inputs, solenoid directional control valve is connected, and enters mechanical part through solenoid directional control valve and tracheae again after the gas process pneumatic triple piece constant voltage, and mass is hit the back to the accelerated motion of test spring direction; Signal 1 input when mass moves to the correlation sensor, solenoid directional control valve disconnects, and gases at high pressure stop input; Mass impacts test spring under the kinetic energy effect; Signal 1 input when moving to the correlation sensor once more after the mass resilience, solenoid directional control valve still disconnects; Mass is to the motion of auxiliary spring direction, and signal 2 is imported when moving to reflection sensor, counter note 1; Mass compresses auxiliary spring; Mass resilience behind the compression auxiliary spring, signal 2 is imported once more during through reflection sensor, counter note 2, PLC output this moment opening signal, solenoid directional control valve is opened, the gases at high pressure input, the impact mass piece continues accelerated motion left.Control by this device just can realize the bump to spring, reaches the dither state.
After the present invention adopts technique scheme, mainly contain following effect:
1, this test unit adopts pressurized air as power source, and it is simple in structure, low price, and pressure is adjustable, can simulate different impact operating modes, and trial stretch is wide;
2, axially be provided with bleeder port with a determining deviation at the developmental tube structure upper edge of this test unit test spring, left side gas can in time be discharged when making mass impulse test spring, reduces the resistance of gas to mass, has improved accuracy of detection;
3, the correlation sensor is adopted on this test unit left side, on the developmental tube structure, offer two holes, reflection sensor is adopted on the right, on the developmental tube structure, only need offer a hole, this structure makes mass increase mass left side gas discharge rate at impact process, reduce the kinetic energy rejection of mass in impact process, also improved accuracy of detection;
4, adopt register pin to be fixed on the developmental tube after test spring is fixed on the spring reference column, simple in structure, fixing reliable, it is convenient that test spring is changed when each test, auxiliary spring adopts bolt also to meet the requirement that it need not be changed when each test, this structure meets test spring and auxiliary spring different operating characteristic in test, and is easy to operate;
5, in process of the test, this percussion mechanism can produce the shock load of high-speed, high-frequency, high capacity to test spring, more can react the actual condition of the spring of the load that withstands shocks more truly, can apply stable shock load continuously to test spring, further improve the precision of detection springs fatigue lifetime;
6, this test unit is simple in structure, and is easy to operate, easy to manufacture, and the development of the spring of, high-frequency high-speed to bearing, high capacity shock load provides test condition, provides reliable foundation for improving spring-mass.
That the present invention can be widely used in bearing is high-speed, the fatigue life test of the cylindrically coiled spring of high-frequency, high capacity shock load.Be specially adapted to the fatigue life test of stranded wire helical spring.
Description of drawings
Fig. 1 is a structural principle block diagram of the present invention;
Fig. 2 is the structural drawing (cut-open view) of present embodiment 1;
Fig. 3 is the structural drawing of Fig. 2 medi-spring reference column and backing pin;
Fig. 4 is an electric control system theory diagram of the present invention.
Among the figure: 1 gases at high pressure power section, 1-1 air compressor, 1-2 gas-holder, 1-3 pneumatic triple piece, 2 electric control systems, 2-1 solenoid directional control valve, 2-2PLC controller, 2-3 correlation sensor, the 2-4 reflection sensor, 3 mechanical parts, 3-1 spring reference column, 3-2 register pin, the 3-3 developmental tube, 3-4 bleeder port, 3-5 mass, 3-6 bolt, the 3-7 pipe connections, 3-8 nut, 3-9 base, 3-10 backing pin, 4 test springs, 5 auxiliary springs, the electromagnet of DT solenoid directional control valve.
Embodiment
Further specify the present invention below in conjunction with embodiment.
Embodiment 1
Shown in Fig. 1~4, a kind of spring fatigue test device of gases at high pressure bump mainly comprises gases at high pressure power section 1, electric control system 2 and mechanical part 3.It is characterized in that:
Described gases at high pressure power section 1 mainly is made up of air compressor 1-1, gas-holder 1-2 and pneumatic triple piece 1-3 (being air strainer, reduction valve and oil sprayer) three parts.Described air compressor 1-1 is communicated with gas-holder 1-2 by tracheae, stores in order to being delivered to by the gases at high pressure that air compressor 1-1 compresses among the gas-holder 1-2, realizes air feed and with the balance of gas, for apparatus of the present invention provide continuous and stable power.Described gas-holder 1-2 passes through pneumatic triple piece 1-3 (being air strainer, reduction valve and oil sprayer) successively by tracheae and is communicated with the inlet end of the solenoid directional control valve 2-1 of electric control system 2, and the endpiece of described solenoid directional control valve 2-1 is connected by the inlet end of tracheae with the pipe connections 3-7 of mechanical part 3.Because filtration and the pressure regulation effect of pneumatic triple piece 1-3, quality is good, the gases at high pressure power of constant pressure for mechanical part 3 provides.
Described electric control system 2 mainly is made up of correlation sensor 2-3, reflection sensor 2-4, hand push button, solenoid directional control valve 2-1, PLC controller 2-2 and PC etc.Described correlation sensor 2-3 is installed in the place, hole on the developmental tube 3-3 that is positioned at test spring 4 free end positions, correlation sensor 2-3 is connected by the input port of signal wire with PLC controller 2-2, and the position signalling (signal 1) when mass 3-5 is contacted with test spring 4 flows to PLC controller 2-2.Described reflection sensor 2-4 is installed in the place, hole on the developmental tube 3-3 that is positioned at auxiliary spring 5 free end positions, reflection sensor 2-4 is connected by the input port of signal wire with PLC controller 2-2, and the position signalling (signal 2) when mass 3-5 is contacted with auxiliary spring 5 flows to PLC controller 2-2.Described hand push button is connected by the input port of signal wire with PLC controller 2-2, in order to hand push button connection signal (being signal 3) is flowed to PLC controller 2-2.The output port of described PLC controller 2-2 is connected by the input port of signal wire with the electromagnet DT of solenoid directional control valve.The connection signal (signal 3) of the position signalling (signal 2) the when position signalling (signal 1) when the detected mass 3-5 of PLC controller 2-2 reception correlation sensor 2-3 contacts with test spring 4 contacts with auxiliary spring 5 with the detected mass 3-5 of reflection sensor 2-4 and the hand push button of hand push button, under the control of described PLC controller 2-2, the break-make of described solenoid directional control valve 2-1 is controlled.Wherein: when signal 1 input, solenoid directional control valve 2-1 disconnects; When signal 2 inputs, by the PLC rolling counters forward, solenoid directional control valve 2-1 just connects when the 2nd input signal 2; During signal 3 inputs, solenoid directional control valve 2-1 connects, and when signal 3 disconnected, solenoid directional control valve 2-1 disconnected.Thereby realize of the input of control gases at high pressure, and then control of quality piece 3-5 is to the impact of test spring 4 to mechanical part 3.Described PC is connected with described PLC controller 2-2 by the serial communication line, carry out information interaction and demonstration, communicating to connect of PC and PLC controller 2-2 not only flows to control program PLC controller 2-2, and suffered frequency of impacts of the test spring that collects will test the time 4 and impact number of times and be presented on the screen, be convenient to real-time monitoring, good man computer interface is provided test.
Described mechanical part 3 mainly is made up of spring reference column 3-1, register pin 3-2, backing pin 3-10, developmental tube 3-3, mass 3-5, pipe connections 3-7, bolt 3-6, nut 3-8 and base 3-9 etc.Described developmental tube 3-3 is fixed on the base 3-9 for 2000mm, internal diameter are that 40mm, wall thickness are that 4mm, material are stainless round tube for long, in order to guarantee that apparatus of the present invention keep in test stable.End at described developmental tube 3-3 is provided with pipe connections 3-7.Described pipe connections 3-7 is the round tube that an end is big, an end is little.The small end of described pipe connections 3-7 is the round tube that long 40mm, external diameter 50mm, wall thickness 4mm, outer wall are provided with pipe thread, described small end is connected by the high-pressure air pipe of pipe thread with the solenoid directional control valve 2-1 output terminal of aforementioned electric control system 2, in order to gases at high pressure with aforesaid gases at high pressure power section 1, send among the described developmental tube 3-3 through the solenoid directional control valve 2-1 of aforementioned electric control system 2, carry out the power of impulse test as test spring 4.The round tube that the external diameter coupling that the big end of described pipe connections 3-7 is long 60mm, wall thickness 4mm, internal diameter and described developmental tube 3-3, inwall have boss.Boss place in described big end is provided with the air admission hole that diameter is 24mm.Described big end suit is welded on the outside surface of described developmental tube 3-3 one end.Auxiliary spring 5 is placed on the end in the described developmental tube 3-3 and is positioned at the air inlet position of the big end inner convex platform of described pipe connections 3-7, by the boss in bolt 3-6 and nut 3-8 and the big end of described pipe connections 3-7 one end of auxiliary spring 5 is fixed.In described developmental tube 3-3 and the free end that is positioned at auxiliary spring 5 place a mass 3-5.The stainless steel right cylinder of the internal diameter coupling that described mass 3-5 is long 120mm, diameter and described developmental tube 3-3.When gases at high pressure are imported developmental tube 3-3 by air admission hole, promote mass 3-5 impulse test spring 4 left.In the other end of described developmental tube 3-3, be provided with spring reference column 3-1.Described spring reference column 3-1 is the multidiameter that an end is big, an end is little.The internal diameter that the big end of described spring reference column is long 80mm, diameter and described developmental tube 3-3 mates and is provided with the right cylinder in register pin 3-2 hole.The small end of described spring reference column 3-1 is the right cylinder of the internal diameter coupling of long 30mm, diameter and test spring 4, and described small end is provided with the tapped through hole that diameter is 6mm.Test spring 4 is sleeved on the small end of described spring reference column 3-1, and in the tapped through hole by threaded backing pin 3-10 screw-in small end an end of test spring 4 is fixed.Described spring reference column 3-1 is placed in the other end of described developmental tube 3-3, inserts by register pin 3-2 in the register pin 3-2 hole of the big end of described spring reference column 3-1, and described spring reference column 3-1 is fixed on the described developmental tube 3-3.On described developmental tube 3-3 and correspond respectively to the free end of test spring 4 and auxiliary spring 5, the hole that one diameter is 10mm is set respectively, be used for installing respectively correlation sensor 2-3 and reflection sensor 2-4, and the position signalling when detecting described mass 3-5 respectively and contacting with auxiliary spring 5 with test spring 4.On described developmental tube 3-3 and corresponding to the bleeder port 3-4 that 4 diameters evenly are set is 10mm of test spring 4 places.
Embodiment 2
A kind of spring fatigue test device of gases at high pressure bump is with embodiment 1.Wherein: described developmental tube 3-3 is 1000mm for length, internal diameter is 15mm, wall thickness is 2mm, the Long-toe-short-heel of described pipe connections 3-7 is 20mm, external diameter 25mm, wall thickness 2mm, big end is long to be 25mm, wall thickness 2mm, the air admission hole diameter at the boss place in the big end of described pipe connections 3-7 is 8mm, the length of described mass 3-5 is 50mm, the big end of described bullet reference column 3-1 is long to be 40mm, Long-toe-short-heel is 15mm, tapped through hole diameter on the small end of described spring reference column 3-1 is 4mm, the diameter in hole that described developmental tube 3-3 went up and corresponded respectively to the free end of test spring 4 and auxiliary spring 5 is 8mm, described bleeder port quantity is 3, and diameter is 8mm.
Embodiment 3
A kind of spring fatigue test device of gases at high pressure bump is with embodiment 1.Wherein: described developmental tube 3-3 is 3000mm for length, internal diameter is 70mm, wall thickness is 8mm, the Long-toe-short-heel of described pipe connections 3-7 is 60mm, external diameter 80mm, wall thickness 8mm, big end is long to be 100mm, wall thickness 8mm, the air admission hole diameter at the boss place in the big end of described pipe connections 3-7 is 50mm, the length of described mass 3-5 is 200mm, the big end of described bullet reference column 3-1 is long to be 130mm, Long-toe-short-heel is 40mm, tapped through hole diameter on the small end of described spring reference column 3-1 is 10mm, the diameter in hole that described developmental tube 3-3 went up and corresponded respectively to the free end of test spring 4 and auxiliary spring 5 is 12mm, described bleeder port quantity is 6, and diameter is 12mm.

Claims (4)

1. the spring fatigue test device of a gases at high pressure bump mainly comprises gases at high pressure power section (1), electric control system (2) and mechanical part (3), it is characterized in that:
Described gases at high pressure power section (1) is mainly by air compressor (1-1), gas-holder (1-2) and pneumatic triple piece (1-3) are air strainer, reduction valve and oil sprayer three parts are formed, air compressor (1-1) is communicated with gas-holder (1-2) by tracheae, it is air strainer that gas-holder (1-2) passes through pneumatic triple piece (1-3) successively by tracheae, reduction valve and oil sprayer are communicated with the inlet end of the solenoid directional control valve (2-1) of electric control system (2), and the endpiece of solenoid directional control valve (2-1) is connected by the inlet end of tracheae with the pipe connections (3-7) of mechanical part (3);
Described electric control system (2) is mainly by correlation sensor (2-3), reflection sensor (2-4), hand push button, solenoid directional control valve (2-1), PLC controller (2-2) and PC are formed, described correlation sensor (2-3) is installed in the place, hole on the developmental tube (3-3) that is positioned at test spring (4) free end position, described correlation sensor (2-3) is connected by the input port of signal wire with PLC controller (2-2), reflection sensor (2-4) is installed in the place, hole on the developmental tube (3-3) that is positioned at auxiliary spring (5) free end position, reflection sensor (2-4) is connected by the input port of signal wire with PLC controller (2-2), described hand push button is connected by the input port of signal wire with PLC controller (2-2), the output port of described PLC controller (2-2) is connected by the input port of signal wire with the electromagnet (DT) of solenoid directional control valve, and described PC is connected with described PLC controller (2-2) by the serial communication line;
Described mechanical part (3) is mainly by spring reference column (3-1), register pin (3-2), backing pin (3-10), developmental tube (3-3), mass (3-5), pipe connections (3-7), bolt (3-6), nut (3-8) and base (3-9) are formed, described developmental tube (3-3) is 1000~3000mm for length, internal diameter is 15~70mm, wall thickness is 2~8mm, material is stainless round tube, be fixed on the base (3-9), be provided with pipe connections (3-7) in an end of described developmental tube (3-3), described pipe connections (3-7) is that an end is big, the round tube that one end is little, the small end of described pipe connections (3-7) is long 20~60mm, external diameter 25~80mm, wall thickness 2~8mm, outer wall is provided with the round tube of pipe thread, described small end is connected by the high-pressure air pipe of pipe thread with solenoid directional control valve (2-1) output terminal of aforementioned electric control system (2), the big end of described pipe connections (3-7) is long 25~100mm, wall thickness 2~8mm, the external diameter coupling of internal diameter and described developmental tube (3-3), inwall has the round tube of boss, boss place in described big end is provided with the air admission hole that diameter is 8-50mm, described big end suit is welded on the outside surface of described developmental tube (3-3) end, auxiliary spring (5) is placed on the end in the described developmental tube (3-3) and is positioned at the air inlet position of the big end inner convex platform of described pipe connections (3-7), by the boss in bolt (3-6) and nut (3-8) and the big end of described pipe connections (3-7) one end of auxiliary spring (5) is fixed, in described developmental tube (3-3) and the free end that is positioned at auxiliary spring (5) place a mass (3-5), described mass (3-5) is long 50~200mm, the stainless steel right cylinder of the internal diameter coupling of diameter and described developmental tube (3-3), in the other end of described developmental tube (3-3), be provided with spring reference column (3-1), described spring reference column (3-1) is that an end is big, the multidiameter that one end is little, the big end of described spring reference column (3-1) is long 40~130mm, the internal diameter coupling of diameter and described developmental tube (3-3), and be provided with the right cylinder of dowel hole, the small end of described spring reference column (3-1) is long 15~40mm, the right cylinder of the internal diameter coupling of diameter and test spring (4), described small end is provided with the tapped through hole that diameter is 4~10mm, test spring (4) is sleeved on the small end of described spring reference column (3-1), and in the tapped through hole by threaded backing pin (3-10) screw-in small end an end of test spring (4) is fixed, described spring reference column (3-1) is placed in the other end of described developmental tube (3-3), insert by register pin (3-2) in the dowel hole of the big end of described spring reference column (3-1), described spring reference column (3-1) is fixed on the described developmental tube (3-3), the diameter in hole that the free end of test spring (4) and auxiliary spring (5) was gone up and corresponded respectively to described developmental tube (3-3) is 8~12mm, described bleeder port (3-4) quantity is 3~6, and diameter is 8~12mm.
2. according to the spring fatigue test device of the described gases at high pressure bump of claim 1, it is characterized in that: described developmental tube (3-3) is the long 2000mm of being, internal diameter is 40mm, wall thickness is 4mm, the Long-toe-short-heel of described pipe connections (3-7) is 40mm, external diameter 50mm, wall thickness 4mm, big end is long to be 60mm, wall thickness 4mm, the air admission hole diameter at the boss place in the big end of described pipe connections (3-7) is 24mm, the length of described mass (3-5) is 120mm, the big end of described spring reference column (3-1) is long to be 80mm, Long-toe-short-heel is 30mm, tapped through hole diameter on the small end of described spring reference column (3-1) is 6mm, the diameter in hole that the free end of test spring (4) and auxiliary spring (5) was gone up and corresponded respectively to described developmental tube (3-3) is 10mm, described bleeder port (3-4) quantity is 4, and diameter is 10mm.
3. according to the spring fatigue test device of the described gases at high pressure bump of claim 1, it is characterized in that: described developmental tube (3-3) is the long 1000mm of being, internal diameter is 15mm, wall thickness is 2mm, the Long-toe-short-heel of described pipe connections (3-7) is 20mm, external diameter 25mm, wall thickness 2mm, big end is long to be 25mm, wall thickness 2mm, the air admission hole diameter at the boss place in the big end of described pipe connections (3-7) is 8mm, the length of described mass (3-5) is 50mm, the big end of described spring reference column (3-1) is long to be 40mm, Long-toe-short-heel is 15mm, tapped through hole diameter on the small end of described spring reference column (3-1) is 4mm, the diameter in hole that the free end of test spring (4) and auxiliary spring (5) was gone up and corresponded respectively to described developmental tube (3-3) is 8mm, described bleeder port (3-4) quantity is 3, and diameter is 8mm.
4. according to the spring fatigue test device of the described gases at high pressure bump of claim 1, it is characterized in that: described developmental tube (3-3) is the long 3000mm of being, internal diameter is 70mm, wall thickness is 8mm, the Long-toe-short-heel of described pipe connections (3-7) is 60mm, external diameter 80mm, wall thickness 8mm, big end is long to be 100mm, wall thickness 8mm, the air admission hole diameter at the boss place in the big end of described pipe connections (3-7) is 50mm, the length of described mass (3-5) is 200mm, the big end of described spring reference column (3-1) is long to be 130mm, Long-toe-short-heel is 40mm, tapped through hole diameter on the small end of described spring reference column (3-1) is 10mm, the diameter in hole that the free end of test spring (4) and auxiliary spring (5) was gone up and corresponded respectively to described developmental tube (3-3) is 12mm, described bleeder port (3-4) quantity is 6, and diameter is 12mm.
CN 201110130887 2011-05-20 2011-05-20 Test apparatus for fatigue of spring under continuous impact of high pressure gas CN102297754B (en)

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CN103016453B (en) * 2012-12-14 2015-02-04 浙江大学 Impulse test system of hydraulic hose
CN103528777A (en) * 2013-09-27 2014-01-22 浙江大学 Random excitation method for quick determination of dynamic characteristic
CN103674514A (en) * 2013-11-12 2014-03-26 芜湖普威技研有限公司 Rear drag arm fatigue test device
CN106197986B (en) * 2016-08-29 2019-07-12 无锡市美峰橡胶制品制造有限公司 A kind of rubber diaphragm fatigue durability test device
CN108801813B (en) * 2018-05-17 2020-12-25 兰州理工大学 Single-point continuous impact test device
CN108692932B (en) * 2018-06-06 2020-04-21 龙元明筑科技有限责任公司 Building structure spare tie point intensity detection device

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