CN101329238A - Load loading device applied to friction tester - Google Patents
Load loading device applied to friction tester Download PDFInfo
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- CN101329238A CN101329238A CNA2007100546275A CN200710054627A CN101329238A CN 101329238 A CN101329238 A CN 101329238A CN A2007100546275 A CNA2007100546275 A CN A2007100546275A CN 200710054627 A CN200710054627 A CN 200710054627A CN 101329238 A CN101329238 A CN 101329238A
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- load
- charger
- push rod
- pulsation
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- 238000011068 loading method Methods 0.000 title claims abstract description 32
- 230000010349 pulsation Effects 0.000 claims abstract description 29
- 230000005540 biological transmission Effects 0.000 claims description 21
- 238000012360 testing method Methods 0.000 claims description 15
- 238000001125 extrusion Methods 0.000 claims description 3
- 238000003032 molecular docking Methods 0.000 claims description 3
- 230000003139 buffering effect Effects 0.000 claims 3
- 238000009434 installation Methods 0.000 claims 1
- 230000000541 pulsatile effect Effects 0.000 description 5
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000003137 locomotive effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
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Abstract
The invention relates to a load pulsation loading device, wherein a pin sample clamp of the device is fixed at one end of a dowel bar, a bar body of the dowel bar is assembled on a body of the loading device through a bearing in a linear movement mode in the axis direction, a set of constant load loading device is arranged on the body of the loading device at the other end of the dowel bar, a load output head of the constant load loading device loads constant pressure on the end surface of the end head, a set of flexible pulsation generating mechanism is additionally arranged on the constant load loading device, and flexible pulsation output of the flexible pulsation generating mechanism and load of the constant load loading device are superposed and then applied to the corresponding end surface of the dowel bar through the load output head of the constant load loading device. The invention continues to use the characteristics of simplicity, easy realization and easy control of the traditional mechanical impact loading, and simultaneously utilizes the flexible loading characteristic of the spring to reduce the noise generated by the impact loading.
Description
Technical field
The present invention relates to a kind of load charger that is applied to frictional testing machine, belong to field of mechanical technique.
Background technology
Pulsation loads or claims pulsatile impact to load, and is a kind of loading form commonly used in test and the actual engineering, is the important means of research material performance under the impact condition.Realize that the mode that pulsation loads has electromagnetism Loading Method, hydraulic method and traditional mechanical means.Electromagnetism loading method pulsed load excitation signal is subjected to external interference big, and loading force is wayward, and loading force is less; Realize that with hydraulic method pulsation loads, system responses is slow to lag behind easily, can't realize that high frequency loads; Traditional mechanical load adopts polarization type or driven type more, and shortcoming is frequency and loads the difficult adjustment of size, and noise is bigger in the use.
Pulsatile impact is carried in the application in the friction wear testing machine, mainly be the analog electrical line of force when slide plate slides the flexibility fluctuation and locomotive vibration, pantograph lifting fluctuation etc. to the soft impulse of slide plate.In the existing friction-wear test equipment, two kinds of load modes are arranged: the one, complete permanent load loads, and can't load pulsatile impact, can only simulate the influence of pantograph lifting power to slide plate and lead in the test, and can't investigate the influence of various shock loads; Another kind of load mode is on the basis that permanent load loads, on the pin specimen holder, increase spring, be used for reducing contact vibration in the test to the percussive action of pin sample, the flexibility contact of analog conducting wire, but the elastic force that spring produced comes from the impact strength of bearing the self-marketing sample passively fully, and the elastic force that spring produces is uncontrollable, can't realize applying the pulsatile impact load of different rules (waveform).
Summary of the invention
In order to solve above-mentioned the deficiencies in the prior art, task of the present invention is to provide a kind of load pulsation charger, loads strength to reach, loading frequency is adjustable, and reduces impact noise.
For finishing above-mentioned task, technical scheme of the present invention is: a kind of load pulsation charger, the pin specimen holder is fixed on an end of transmission rod, the body of rod of transmission rod is assemblied on the body of charger in the mode that the axis direction straight line moves by bearing, the body of the charger of the transmission rod other end is provided with a cover constant load charger, the load delivery of constant load charger loads constant pressure on the end face of this termination, also be equipped with the flexible pulsation of cover generating mechanism on the constant load charger, the flexibility pulsation output of this flexibility pulsation generating mechanism is applied on the corresponding end face of transmission rod with the load delivery of the load stack back of constant load charger by the constant load charger.
Described flexible pulsation generating mechanism is made of a to-and-fro movement generator and a flexible reciprocating push rod that cooperates with this to-and-fro movement generator transmission, one end of push rod cooperates with the reciprocal transmission of this to-and-fro movement generator, and the load loading end or the load delivery of the other end of push rod and constant load charger are in transmission connection.
Described to-and-fro movement generator is made of the cam that assembles in motor on the body that is fixed on charger and the rotating shaft thereof.
The flexible buffer mechanism that described flexible reciprocating push rod is established by string on push rod and the push rod constitutes.
Primary and secondary sleeve pipe, buffer spring and the push rod that described flexible buffer mechanism is docking together by pair of push rods direction spiral is mainly to constitute, the tail end and the push rod of sub-sleeve pipe are fixed together, buffer spring is inserted in the sub-sleeve pipe rear, one end of push rod slides in first section that is inserted into sub-sleeve pipe and cooperates with the buffer spring roof pressure, the other end of push rod cooperates with the cam roll extrusion by the roller of installing, and push rod cooperates with the port position anti-avulsion of female sleeve pipe.
Described constant load charger is made of a bent-arm lever and counterweight, and the flex point place of bent-arm lever rotates and is assemblied on the body of charger, and a termination of bent-arm lever is as the load delivery, and the other end is equipped with the loading counterweight.
The tail end of the push rod of described flexible buffer mechanism is forged by the counterweight assembling of Connection Block and bent-arm lever and is linked together.
The present invention is a kind of new pulsatile impact loading method that forms on the basis of existing mechanical load mode.Keep the traditional mechanical formula and impacted simple, the easy realization that loads, manageable characteristics, utilize simultaneously flexible load mode again, simulated the way of contact of bow net system truly, so that use the rubbing wear problem that the testing machine with above-mentioned charger solves the bow net system.It has following characteristics:
(1) can realize loading the pulsed load of various ways.It is the load mode of sine or cosine and impact type that traditional mechanical type pulsation loading can only provide simple loading force, the present invention utilizes the variation of the physical dimension of continuous change radius cam when rotating a circle, act on compression spring that cam contacts on, provide loading force by compression spring.By changing the profile of cam, just can obtain the loaded load of various ways.(2) can obtain different loaded load.By changing the spring of different elasticity coefficient, obtain different loading forces, elasticity coefficient is big more, and the strength that provides during the identical length of length of spring compressed is also just big more.(3) can control the pulsation loading frequency easily.The present invention utilizes variable-frequency motor to drive change radius cam rotation continuously, changes motor speed by frequency converter and realizes different loading frequencies.(4) reduced the loading noise.Contact position at cam and compression spring increases a rolling bearing, and the change sliding friction is rolling friction, has not only reduced the friction energy loss of contact position and the generation of heat of friction, more greatly reduces friction noise.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the assembling relationship figure of Fig. 1 cam and push rod.
Embodiment
As Fig. 1, shown in Figure 2, this load pulsation charger, pin specimen holder 1 is fixed on an end of transmission rod 2, the body of rod of transmission rod 2 is assemblied on the body of charger in the mode that the axis direction straight line moves by bearing 3, the body of the charger of transmission rod 2 other ends is provided with a cover constant load charger, the load delivery 4 of constant load charger loads constant pressure on the end face of this termination, also be equipped with the flexible pulsation of cover generating mechanism on the constant load charger, the flexibility pulsation output of this flexibility pulsation generating mechanism is applied on the corresponding end face of transmission rod with the load delivery of the load stack back of constant load charger by the constant load charger.Flexible pulsation generating mechanism is made of a to-and-fro movement generator and a flexible reciprocating push rod that cooperates with this to-and-fro movement generator transmission, one end of push rod cooperates with the reciprocal transmission of this to-and-fro movement generator, and the load loading end or the load delivery of the other end of push rod and constant load charger are in transmission connection.The to-and-fro movement generator is made of the cam 8 of assembling in motor on the body that is fixed on charger 6 and the rotating shaft 7 thereof in the present embodiment.The flexible buffer mechanism that flexible reciprocating push rod is established by string on push rod 5 and the push rod constitutes.The primary and secondary sleeve pipe 11,12 that flexible buffer mechanism is docking together by pair of push rods direction spiral in the present embodiment, buffer spring 9 and push rod 10 are that the master constitutes, the tail end of sub-sleeve pipe 11 and push rod 5 are fixed together, buffer spring 9 is inserted in sub-sleeve pipe 11 rears, one end of push rod 10 slides in first section that is inserted into sub-sleeve pipe 11 and cooperates with buffer spring 9 roof pressures, the other end of push rod 10 cooperates with cam 8 roll extrusion by the roller of installing 13, and push rod 10 cooperates with the port position anti-avulsion of female sleeve pipe 12.The constant load charger is made of a bent-arm load bar 15 and counterweight 16, and the flex point place of bent-arm load bar 15 rotates and is assemblied on the body of charger, and a termination of bent-arm load bar 15 is as load delivery 4, and the other end is equipped with and loads counterweight 16.The tail end of the push rod 5 of flexible buffer mechanism links together by the counterweight load segment of Connection Block 17 with the bent-arm load bar.
The present invention applies permanent load with counterweight 16, and flexible pulsation generating mechanism is fixed together by Connection Block 17 and load bar 15, and the load that cam 14 rotation compression springs 9 produce is delivered on the load bar 15 through Connection Block 17, is delivered to the pin sample by load bar.
Claims (7)
1, a kind of load charger that is applied to frictional testing machine, the pin specimen holder is fixed on an end of transmission rod, the body of rod of transmission rod is assemblied on the body of charger in the mode that the axis direction straight line moves by bearing, the body of the charger of the transmission rod other end is provided with a cover constant load charger, the load delivery of constant load charger loads constant pressure on the end face of this termination, it is characterized in that, also be equipped with the flexible pulsation of cover generating mechanism on the constant load charger, the load delivery by the constant load charger after the flexibility pulsation output of this flexibility pulsation generating mechanism and the load modulation stack of constant load charger is applied on the corresponding end face of transmission rod.
2, the load charger that is applied to frictional testing machine according to claim 1, it is characterized in that, described flexible pulsation generating mechanism is made of a pulsation source and a flexible push rod that cooperates with this pulsation source transmission, one end of push rod cooperates with this pulsation source transmission, and the load loading end or the load delivery of the other end of push rod and constant load charger are in transmission connection.
3, the load charger that is applied to frictional testing machine according to claim 2 is characterized in that, described pulsation source is made of the cam that assembles in motor on the body that is fixed on charger and the rotating shaft thereof.
According to claim 2 or the 3 described load chargers that are applied to frictional testing machine, it is characterized in that 4, the elastic buffering mechanism that described flexible push rod is established by string on push rod and the push rod constitutes.
5, the load charger that is applied to frictional testing machine according to claim 4, it is characterized in that, primary and secondary sleeve pipe, buffer spring and the push rod that described elastic buffering mechanism is docking together by pair of push rods direction spiral is that the master constitutes, the tail end and the push rod of sub-sleeve pipe are fixed together, buffer spring is inserted in the sub-sleeve pipe rear, one end of push rod slides in first section that is inserted into sub-sleeve pipe and cooperates with the buffer spring roof pressure, and the other end of push rod cooperates with the cam roll extrusion by the roller of installation.
6, the load charger that is applied to frictional testing machine according to claim 5, it is characterized in that, described constant load charger is made of one " L " type lever and counterweight, the flex point place of " L " type lever rotates and is assemblied on the body of charger, one termination of " L " type lever is as the load delivery, and the other end is equipped with the loading counterweight.
7, the load charger that is applied to frictional testing machine according to claim 6 is characterized in that, the tail end of the push rod of described elastic buffering mechanism links together by the counterweight assembling end of Connection Block with " L " type lever.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100546275A CN101329238B (en) | 2007-06-20 | 2007-06-20 | Load charger applied to friction test machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100546275A CN101329238B (en) | 2007-06-20 | 2007-06-20 | Load charger applied to friction test machine |
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| Publication Number | Publication Date |
|---|---|
| CN101329238A true CN101329238A (en) | 2008-12-24 |
| CN101329238B CN101329238B (en) | 2011-09-28 |
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| CN2007100546275A Active CN101329238B (en) | 2007-06-20 | 2007-06-20 | Load charger applied to friction test machine |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103114614A (en) * | 2013-02-06 | 2013-05-22 | 河南科技大学 | Pile foundation dynamic load loading vibration exciter |
| CN105388760A (en) * | 2015-12-08 | 2016-03-09 | 辽宁工程技术大学 | Experimental pantograph and catenary system dynamic pressure precise loading device and control method |
| CN106970023A (en) * | 2017-05-11 | 2017-07-21 | 北京科技大学 | A kind of passive load testing machine of expansive rock expansion characteristics test |
| CN107755571A (en) * | 2016-08-19 | 2018-03-06 | 北京机电研究所 | A kind of lower ejecting mechanism |
| CN110044614A (en) * | 2019-05-09 | 2019-07-23 | 山东理工大学 | A kind of mechanical periodic cycle dynamic loading experiments loading device |
| CN110186799A (en) * | 2019-06-17 | 2019-08-30 | 中国科学院力学研究所 | Pantograph pan current-carrying frictional wear experiment machine and application method |
-
2007
- 2007-06-20 CN CN2007100546275A patent/CN101329238B/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103114614A (en) * | 2013-02-06 | 2013-05-22 | 河南科技大学 | Pile foundation dynamic load loading vibration exciter |
| CN105388760A (en) * | 2015-12-08 | 2016-03-09 | 辽宁工程技术大学 | Experimental pantograph and catenary system dynamic pressure precise loading device and control method |
| CN107755571A (en) * | 2016-08-19 | 2018-03-06 | 北京机电研究所 | A kind of lower ejecting mechanism |
| CN107755571B (en) * | 2016-08-19 | 2024-05-14 | 北京机电研究所 | Lower ejection mechanism |
| CN106970023A (en) * | 2017-05-11 | 2017-07-21 | 北京科技大学 | A kind of passive load testing machine of expansive rock expansion characteristics test |
| CN110044614A (en) * | 2019-05-09 | 2019-07-23 | 山东理工大学 | A kind of mechanical periodic cycle dynamic loading experiments loading device |
| CN110044614B (en) * | 2019-05-09 | 2021-05-28 | 山东理工大学 | Mechanical type periodic cycle dynamic load experiment loading device |
| CN110186799A (en) * | 2019-06-17 | 2019-08-30 | 中国科学院力学研究所 | Pantograph pan current-carrying frictional wear experiment machine and application method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101329238B (en) | 2011-09-28 |
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