CN209927652U

CN209927652U - Cylinder sleeve-piston ring frictional wear test device

Info

Publication number: CN209927652U
Application number: CN201822090153.6U
Authority: CN
Inventors: 屈盛官; 谢明鑫; 方波; 李小强
Original assignee: South China University of Technology SCUT
Current assignee: South China University of Technology SCUT
Priority date: 2018-12-12
Filing date: 2018-12-12
Publication date: 2020-01-10
Anticipated expiration: 2028-12-12

Abstract

The utility model discloses a cylinder liner-piston ring frictional wear test device, include: the piston rod extends into the cylinder sleeve, the inner radial adjusting mechanism is fixed on the piston rod, the plug ring clamping mechanism is arranged on the inner radial adjusting mechanism, the piston ring is installed on the plug ring clamping mechanism, and the piston ring is in contact with the inner wall surface of the cylinder sleeve; the cylinder sleeve is fixed on the cylinder body clamping mechanism, the cylinder body clamping mechanism is connected with the lifting mechanism, the end part of the piston rod, extending out of the opening of the cylinder sleeve, penetrates into the guide seat, and the crankshaft is in contact with the end part of the piston rod penetrating into the guide seat. The utility model discloses can carry out cylinder liner-piston ring frictional wear test to the ladder cylinder liner of different progression and the piston ring of different specifications.

Description

Cylinder sleeve-piston ring frictional wear test device

Technical Field

The utility model relates to a mechanical properties tests the field, in particular to cylinder liner-piston ring frictional wear test device.

Background

The cylinder sleeve and the piston ring are one of the most important friction pairs of the compressor, and the performance of the friction wear of the cylinder sleeve and the piston ring directly influences the use performance of the compressor. Under different temperature and load conditions, the physical properties of the cylinder sleeve-piston ring can be obviously changed, and the normal application of the cylinder sleeve-piston ring is influenced. The cylinder sleeve-piston ring usually works in severe environments such as high temperature and the like, so that the cylinder sleeve-piston ring is subjected to thermal deformation, the radial working clearance of the initial design is changed, and the wear is aggravated and the service life is shortened. Meanwhile, the excessive temperature rise changes the rheological property of an oil film, and further influences the friction performance of the cylinder sleeve-piston ring under the high-temperature condition, so that the failure phenomena of cylinder pulling, cylinder holding and the like are caused. In addition, too low ambient temperature may deteriorate the tribological properties of the piston ring and liner materials and the lubricating quality of the lubricating oil, making the frictional behavior therebetween more severe.

At present, various types of cylinder sleeve-piston ring friction wear test beds are available at home and abroad, physical characteristics of various types of multi-specification piston rings and cylinder sleeves under various temperature conditions are expected to be obtained, but the piston rings and the cylinder sleeves are usually fixed in size, few in measurable variable and narrow in universality, actual working conditions of the cylinder sleeves-piston rings cannot be effectively simulated, and comprehensive performance tests of rolling bearings at high temperature and low temperature cannot be simultaneously carried out.

SUMMERY OF THE UTILITY MODEL

To the technical problem who exists among the prior art, the utility model aims at: provides a cylinder sleeve-piston ring frictional wear test device.

The purpose of the utility model is realized through the following technical scheme: a cylinder liner-piston ring frictional wear test device, comprising: the piston rod extends into the cylinder sleeve, the inner radial adjusting mechanism is fixed on the piston rod, the plug ring clamping mechanism is arranged on the inner radial adjusting mechanism, the piston ring is installed on the plug ring clamping mechanism, and the piston ring is in contact with the inner wall surface of the cylinder sleeve; the cylinder sleeve is fixed on the cylinder body clamping mechanism, the cylinder body clamping mechanism is connected with the lifting mechanism, the end part of the piston rod, extending out of the opening of the cylinder sleeve, penetrates into the guide seat, and the crankshaft is in contact with the end part of the piston rod penetrating into the guide seat.

Preferably, the cylinder body clamping mechanism is a first chuck, the cylinder sleeve is fixed by the first chuck through clamping jaws, the first chuck is connected to the lifting mechanism, and flange clamping surfaces protrude from the clamping surfaces of the clamping jaws of the first chuck;

the inner radial adjusting mechanism is a second chuck, the piston rod is fixedly connected with a middle hole of the second chuck, and a clamping jaw of the second chuck is connected with the plug ring clamping mechanism.

Preferably, the plug ring fixture includes the clamping unit, and the quantity of clamping unit is the same and the one-to-one setting with the jack catch quantity of second chuck, and the clamping unit includes base plate, splint, assembly spring and clamp bolt, and the base plate is "L" shape, and the erections face of the base plate of clamping unit sets up respectively to the jack catch of second chuck, and clamp bolt wears to establish on the transverse plane of splint and base plate, and a splint side has seted up the clamp groove, forms the spring clamping district between the transverse plane of splint side lower part and base plate, the assembly spring sets up in the spring clamping district, the piston ring clamping is on the clamp groove of each clamping unit and piston ring part protrusion in clamp groove, and the piston ring that protrudes in clamp groove contacts with the cylinder liner internal face.

Preferably, each clamping plate is provided with more than two clamping grooves along the height direction, the number of the piston rings is the same as that of the clamping grooves on each clamping plate, and each piston ring is clamped in the clamping grooves of the four clamping plates at the same height;

the first chuck and the second chuck are a four-jaw chuck, a two-jaw chuck, a three-jaw chuck, a six-jaw chuck or a special chuck.

Preferably, the piston rod includes push rod, cock sleeve, lock sleeve nut, direction type parallel key and assembly actuating mechanism, the push rod surface has the shaft shoulder, and the cock sleeve suit is on the push rod, and cock sleeve one end contacts with the shaft shoulder, has the screw thread section on the push rod, thereby lock sleeve nut is fixed the cock sleeve to between shaft shoulder and lock sleeve nut through being connected to the other end of cock sleeve on the screw thread section, and the channel has been seted up to corresponding on push rod and the cock sleeve, forms the keyway between the channel of push rod and cock sleeve, direction type parallel key sets up in the keyway, and assembly actuating mechanism is connected with the cock sleeve when dismouting cock sleeve, and assembly actuating mechanism is arranged in pushing out the cock sleeve push rod or telescope into the push rod when dismouting cock sleeve.

Preferably, the cylinder sleeve is a multi-stage stepped cylinder sleeve; the inner radial adjusting mechanisms are multiple, correspond to the inner wall of each stage of the stepped cylinder sleeve respectively and are arranged on the piston rod, and the piston ring is installed on each inner radial adjusting mechanism.

Preferably, the cylinder sleeve is a stepped cylinder sleeve with a first upper step and a first lower step, the number of the cylinder body clamping mechanisms is two, the two cylinder body clamping mechanisms are respectively arranged on the first upper step and the first lower step, the number of the lifting mechanisms is two, and the two cylinder body clamping mechanisms are respectively connected to the two lifting mechanisms;

the two inner radial adjusting mechanisms are respectively arranged on the piston rod, each inner radial adjusting mechanism is provided with the piston ring, the piston ring clamped by one inner radial adjusting mechanism of the two inner radial adjusting mechanisms is contacted with the inner wall surface of the first upper step of the cylinder sleeve, and the piston ring clamped by the other inner radial adjusting mechanism of the two inner radial adjusting mechanisms is contacted with the inner wall surface of the first lower step of the cylinder sleeve.

Preferably, the piston rod comprises a push rod, a plug sleeve, a lock sleeve nut, a guide flat key and an assembly driving mechanism, the outer surface of the push rod is provided with a shaft shoulder, the plug sleeve is sleeved on the push rod, one end of the plug sleeve is in contact with the shaft shoulder, the push rod is provided with a threaded section, the lock sleeve nut is connected to the threaded section so as to limit the plug sleeve between the shaft shoulder and the lock sleeve nut from the other end of the plug sleeve, the push rod and the plug sleeve are correspondingly provided with a channel, a key groove is formed between the push rod and the channel of the plug sleeve, the guide flat key is arranged in the key groove, the assembly driving mechanism is connected with the plug sleeve when the plug sleeve is disassembled and assembled, and the assembly driving mechanism is used for pushing the plug sleeve out of the push;

the plug sleeve comprises an upper sleeve body and a lower sleeve body, the lower part of the upper sleeve body is provided with a stepped inner hole with threads, the upper part of the lower sleeve body extends out of an annular connecting sheet, and the annular connecting sheet is connected into the stepped inner hole through the threads;

the two inner radial adjusting mechanisms are respectively arranged on the upper sleeve body and the lower sleeve body.

Preferably, the lifting mechanism comprises a servo motor, a ball screw and a lifting block, the servo motor is connected with the ball screw and used for driving the ball screw to rotate, the lifting block is connected with the ball screw through a threaded hole, and the two cylinder clamping mechanisms are respectively installed on the lifting blocks of the two lifting mechanisms.

Preferably, the crankshaft comprises a crankshaft body, a pin shaft, a link rod, a driving motor with adjustable working power supply frequency and a torque sensor for detecting the output torque of the driving motor, the driving motor is connected with the crankshaft body, an assembly hole is axially formed in the end part of a piston rod penetrating into the guide seat, a pin shaft hole is radially formed in the end part of the piston rod penetrating into the guide seat, after the link rod penetrates into the assembly hole, the pin shaft penetrates into the pin shaft hole and penetrates through the link rod, so that the link rod is connected with the piston rod, the link rod is in contact with the crankshaft body, and the crankshaft body rotates to drive the piston rod to move up and down along the;

the cylinder sleeve is characterized by also comprising an insulation box and an oil tank for supplying lubricating oil to the inner wall surface of the cylinder sleeve, wherein the insulation box covers the outer side of the cylinder sleeve, an opening at the bottom of the insulation box is connected to the guide seat, and a heating wire, a refrigerating system and a fan are arranged in the insulation box;

the device comprises a cylinder body clamping mechanism, a cylinder sleeve-piston ring pair mill, a temperature transmitter, a radial force sensor, a heater, a temperature transmitter, a flowmeter and a pressure regulating valve, wherein the cylinder sleeve-piston ring pair mill is used for detecting the temperature of the cylinder sleeve-piston ring pair mill, the radial force sensor is used for detecting the magnitude of the radial loading force applied to the inner radial adjusting mechanism, the heater is used for heating lubricating oil in the oil tank, the temperature transmitter is used for measuring the temperature of the lubricating oil, the flowmeter is used for detecting the flow of the lubricating oil, and the pressure regulating valve is used for carrying out closure pressure reduction on the lubricating oil.

The utility model discloses for prior art have following advantage and effect:

1. the utility model discloses an each elevating system can supply fixed position with each cylinder fixture adjustment to the cylinder liner, consequently, can carry out the clamping to the ladder cylinder liner of different progression, and can set up the stopper ring fixture that corresponds quantity and structure according to the piston ring of different specifications on the piston rod, and the diameter that internal diameter guiding mechanism adjusted to ladder cylinder liners at different levels is adjusted respectively in deuterogamying to reach and carry out cylinder liner-piston ring friction wear test to the ladder cylinder liner of different progression and the piston ring of different specifications.

2. The utility model discloses a cylinder body fixture and internal diameter are to guiding mechanism adoption four-jaw chuck, stretch out and realize radial adjustment with the income through four-jaw chuck's jack catch, consequently, but convenient and fast's realization adjustment, and fixed mode is convenient and reliable, is favorable to improving test efficiency. In addition, a two-jaw chuck, a three-jaw chuck, a six-jaw chuck, a special chuck and the like can be adopted, and a manual chuck, a pneumatic chuck, a hydraulic chuck, a mechanical chuck and the like can be selected for power selection of the chuck to realize automatic clamping.

3. The utility model discloses can carry out real-time accurate on-line measuring to performance parameters such as real-time moment of torsion, temperature, radial loading power, frictional force, lubricating oil temperature, pressure, flow, realize different cylinder liner-piston ring operational environment temperature, radial load, main shaft rotational speed, lubricated condition to the vice influence research of cylinder liner-piston ring friction.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is an enlarged view at A in FIG. 1;

fig. 3 is a schematic view of the clamping faces of the jaws of a first four-jaw chuck according to the present invention;

fig. 4 is a schematic view of the piston ring of the present invention clamped to the plug ring clamping mechanism.

Detailed Description

The present invention will be described in further detail with reference to the following examples and drawings, but the present invention is not limited thereto.

A cylinder liner-piston ring frictional wear test device, comprising: the piston rod extends into the cylinder sleeve 1, the inner radial adjusting mechanism 6 is fixed on the piston rod, the plug ring clamping mechanism 4 is arranged on the inner radial adjusting mechanism 6, the piston ring 3 is arranged on the plug ring clamping mechanism 4, and the piston ring 3 is contacted with the inner wall surface of the cylinder sleeve 1; the cylinder sleeve 1 is fixed on the cylinder body clamping mechanism 2, the cylinder body clamping mechanism 2 is connected with the lifting mechanism, the end part of the piston rod extending out of the opening of the cylinder sleeve 1 penetrates into the guide seat 5, and the crankshaft is in contact with the end part of the piston rod penetrating into the guide seat 5.

Preferably, the cylinder body clamping mechanism 2 is a first four-jaw chuck, the cylinder sleeve 1 is fixed by the first four-jaw chuck through jaws, the first four-jaw chuck is connected to the lifting mechanism, and flange clamping surfaces 31 are protruded on clamping surfaces of the jaws of the first four-jaw chuck; the flange clamping surface 31 can adapt to clamping of the cylinder sleeves 1 with different diameters, and the convenient clamping is ensured to be in place and more stable.

Preferably, the inner radial adjusting mechanism 6 is a second four-jaw chuck, the piston rod is fixedly connected with a middle hole of the second four-jaw chuck, and four jaws of the second four-jaw chuck are connected with the plug ring clamping mechanism 4.

When the cylinder sleeves 1 with different diameters are clamped, the clamping can be realized only by adjusting the four clamping jaws of the first four-jaw chuck.

When the inner radial adjusting mechanism 6 performs radial adjustment, if a gap exists between the piston ring 3 and the inner wall surface of the cylinder sleeve 1 or the contact pressure does not meet the set requirement, the four claws of the second four-claw chuck are adjusted to move towards the inner wall surface of the cylinder sleeve 1 (the four claws of the second four-claw chuck radially expand), so that the piston ring 3 is in contact with the inner wall surface of the cylinder sleeve 1 or reaches the set contact pressure, if the diameter of the piston ring 3 is too large to cause the piston ring to be assembled into the cylinder sleeve 1, the four claws of the second four-claw chuck can radially contract, so as to drive the piston ring clamping mechanism 4 to move, so that the diameter of the piston ring 3 is reduced, then after the piston ring 3 is assembled into the cylinder sleeve 1, the four claws of the second four-claw chuck are expanded, so that the piston ring 3 is in contact with the inner wall surface of the cylinder sleeve 1 or reaches the set contact pressure, therefore, the inner radial, and also has the effect of assisting the installation of the piston ring 3.

Preferably, the plug ring fixture 4 includes four clamping units, the clamping unit includes base plate, splint 7, assembly spring 8 and clamp bolt 9, and the base plate is "L" shape, and on the erector face 10 of the base plate of four clamping units set up four jack catchs of the four-jaw chuck of second respectively, clamp bolt 9 wore to establish on splint 7 and the transverse plane 11 of base plate, splint 7 side has seted up the clamp groove, forms the spring clamping district between the transverse plane 11 of splint 7 side lower part and base plate, assembly spring 8 sets up in the spring clamping district, piston ring 3 clamping is on the clamp groove of four clamping units and 3 parts of protrusion in the clamp groove, and piston ring 3 protrusion in the clamp groove contacts with 1 internal face of cylinder liner.

When the clamping bolt 9 is screwed down, the assembling spring 8 can play a role in balancing the pressing force of the clamping bolt 9, and when the clamping bolt 9 is loosened, the assembling spring 8 bounces off the clamping plate 7, so that the effect of convenient disassembly is achieved.

Preferably, each clamping plate 7 is provided with more than two clamping grooves along the height direction, the number of the piston rings 3 is the same as that of the clamping grooves on each clamping plate 7, and each piston ring 3 is clamped in the clamping grooves of the four clamping plates 7 at the same height.

For example: two clamping grooves are formed in each clamping plate 7 in the height direction, two piston rings 3 are respectively installed in the clamping grooves of the same height of each clamping plate 7, and when a cylinder sleeve-piston ring friction wear test is carried out, the two piston rings 3 can be tested simultaneously, so that random errors are avoided, and the test efficiency can be effectively improved.

Preferably, the piston rod comprises a push rod 12, a plug sleeve, a lock sleeve nut 13, a guide flat key 14 and an assembly driving mechanism 15, wherein a shaft shoulder 16 is arranged on the outer surface of the push rod 12, the plug sleeve is sleeved on the push rod 12, one end of the plug sleeve is in contact with the shaft shoulder 16, a threaded section is arranged on the push rod 12, the lock sleeve nut 13 is connected to the threaded section so that the plug sleeve is fixed between the shaft shoulder 16 and the lock sleeve nut 13 from the other end of the plug sleeve, channels are correspondingly formed in the push rod 12 and the plug sleeve, a key groove is formed between the push rod 12 and the channel of the plug sleeve, the guide flat key 14 is arranged in the key groove, the assembly driving mechanism 15 is connected with the plug sleeve when the plug sleeve is disassembled and assembled, and the assembly driving mechanism 15 is used for pushing the plug sleeve out of the push rod 12. The assembly driving mechanism 15 may be a hydraulic push rod or a pneumatic push rod. The lock sleeve nut 13 comprises a nut body and a stop gasket 17, wherein the stop gasket 17 is arranged between the nut body and the plug sleeve, and the stop gasket 17 is tightly contacted with the plug sleeve by screwing the nut body, so that the plug sleeve is locked and prevented from moving axially.

When dismantling the gag, loosen lock sleeve nut 13, then, take out direction type parallel key 14, start assembly actuating mechanism 15, thereby assembly actuating mechanism 15 can promote the gag rebound and break away from push rod 12, when the gag is packed into, assembly actuating mechanism 15 can pull the gag and embolia push rod 12, it is visible the utility model discloses can realize the semi-automatization dismouting of gag.

Preferably, the cylinder sleeve 1 is a multi-stage stepped cylinder sleeve 1; the inner radial adjusting mechanisms 6 are multiple, the inner radial adjusting mechanisms 6 correspond to the inner wall of each step cylinder sleeve 1 and are arranged on the piston rod, and the piston ring 3 is installed on each inner radial adjusting mechanism 6.

Preferably, the two-stage stepped cylinder liner 1 will be described as an example: the cylinder sleeve 1 is a stepped cylinder sleeve 1 with a first upper step 18 and a first lower step 19, the number of the cylinder body clamping mechanisms 2 is two, the two cylinder body clamping mechanisms 2 are respectively arranged on the first upper step 18 and the first lower step 19, the number of the lifting mechanisms is two, and the two cylinder body clamping mechanisms 2 are respectively connected to the two lifting mechanisms;

the number of the inner radial adjusting mechanisms 6 is two, the two inner radial adjusting mechanisms 6 are respectively arranged on the piston rod, each inner radial adjusting mechanism 6 is provided with the piston ring 3, one of the two piston rings 3 is in contact with the inner wall surface of a first upper step 18 of the cylinder sleeve 1, and the other of the two piston rings 3 is in contact with the inner wall surface of a first lower step 19 of the cylinder sleeve 1.

Preferably, the piston rod comprises a push rod 12, a plug sleeve, a lock sleeve nut 13, a guide flat key 14 and an assembly driving mechanism 15, wherein a shaft shoulder 16 is arranged on the outer surface of the push rod 12, the plug sleeve is sleeved on the push rod 12, one end of the plug sleeve is in contact with the shaft shoulder 16, a threaded section is arranged on the push rod 12, the lock sleeve nut 13 is connected to the threaded section so that the plug sleeve is fixed between the shaft shoulder 16 and the lock sleeve nut 13 from the other end of the plug sleeve, channels are correspondingly formed in the push rod 12 and the plug sleeve, a key groove is formed between the push rod 12 and the channel of the plug sleeve, the guide flat key 14 is arranged in the key groove, and the assembly driving mechanism 15 is connected with the plug;

preferably, the plug sleeve comprises an upper sleeve body 20 and a lower sleeve body 21, the lower part of the upper sleeve body is provided with a stepped inner hole with threads, the upper part of the lower sleeve body 21 extends out of an annular connecting piece 22, and the annular connecting piece 22 is connected into the stepped inner hole through threads;

preferably, the two inner radial adjustment mechanisms 6 are respectively arranged on the upper sleeve body 20 and the lower sleeve body 21.

The plug sleeve adopts a split structure of the upper sleeve body 20 and the lower sleeve body 21, the upper sleeve body 20 and the lower sleeve body 21 can be separately installed and replaced, the weight is reduced, and the installation and replacement efficiency and convenience of the second four-jaw chuck can be improved.

Preferably, the lifting mechanism comprises a servo motor 23, a ball screw 24 and a lifting block 25, the servo motor 23 is connected with the ball screw 24, the servo motor 23 is used for driving the ball screw 24 to rotate, the lifting block 25 is connected with the ball screw 24 through a threaded hole, and the two cylinder clamping mechanisms 2 are respectively installed on the lifting blocks 25 of the two lifting mechanisms.

Preferably, the crankshaft comprises a crankshaft body 26, a pin shaft 27, a link rod 28, a driving motor 29 and a torque sensor for detecting the output torque of the driving motor 29, the driving motor 29 is connected with the crankshaft body 26, an assembly hole is axially formed at the end of the piston rod penetrating into the guide seat 5, a pin shaft hole is radially formed at the end of the piston rod penetrating into the guide seat 5, after the link rod 28 penetrates into the assembly hole, the pin shaft 27 penetrates into the pin shaft hole and penetrates through the link rod 28, so as to connect the link rod 28 with the piston rod, the link rod 28 is in contact with the crankshaft body 26, and the crankshaft body 26 rotates so as to drive the piston rod to move up and down along the guide seat 5.

Preferably, the cylinder liner heat insulation device further comprises an insulation box 30, the insulation box 30 covers the outer side of the cylinder liner 1, an opening in the bottom of the insulation box 30 is connected to the guide seat 5, and a heating wire, a refrigerating system, a fan and an infrared detector are arranged in the insulation box 30. And a friction force sensor and a temperature transmitter are arranged on the jaws of the first four-jaw chuck.

In the friction and wear test process of the cylinder sleeve-piston ring, the torque sensor can detect the torque output by the driving motor in real time, and the friction force sensor and the temperature transmitter which are connected to the jaws of the first four-jaw chuck can acquire the friction force and temperature parameters generated by the cylinder sleeve-piston ring through opposite grinding in real time, so that the real-time accurate measurement of dynamic parameters such as the torque, the friction force, the temperature and the like is realized.

In the friction wear test process of the cylinder sleeve-piston ring, the heating wire is used for heating air, the refrigerating system is used for cooling air, the fan can provide circulating cooling air volume, and the infrared detector is used for reading the temperature in the heat preservation box in real time. Through opening and close of control electric heating wire, refrigerating system and fan, can make experimental environment become hot, become cold and can test under the air current that flows, it is visible the utility model discloses can make cylinder liner-piston ring frictional wear test go on under different environmental conditions, can press close to operating condition more, make the experiment more accurate, the utility model discloses also can simulate out the environmental condition of abominable high, low temperature work and high, low temperature storage to the research reliability that makes the sample of being surveyed is higher.

In the process of the friction and wear test of the cylinder sleeve and the piston ring, the input rotating speed of the crankshaft can be increased or decreased by changing the working power supply frequency of the driving motor 29, so that the piston ring is tested at different moving speeds. The influence of the movement speed on the frictional wear performance of the cylinder sleeve-piston ring is researched by accurately detecting dynamic parameters such as torque, friction force, temperature and the like in real time.

The utility model discloses still be provided with the oil tank, be provided with the heater in the oil tank for the lubricating oil heating, the oil tank export is provided with temperature transmitter, flowmeter and air-vent valve, and temperature transmitter is used for measuring the lubricating oil temperature, and the flowmeter is used for detecting the lubricating oil flow, and the air-vent valve can carry out the decompression, visible to the lubricating oil that passes through damming the utility model discloses can realize the regulation of lubricating oil temperature, pressure, flow. The utility model discloses can make cylinder liner-piston ring frictional wear test go on under different lubricated conditions, can press close to actual conditions more, make the experiment more accurate. The influence of the lubricating condition on the frictional wear performance of the cylinder sleeve-piston ring is researched by accurately detecting dynamic parameters such as torque, friction force, temperature and the like in real time.

In cylinder liner-piston ring frictional wear test process, after the piston ring was good in the clamping, the jack catch of drive second four-jaw chuck drove the mechanism of ring clamping, made the piston ring radial expansion, and the radial force sensor on the jack catch of second four-jaw chuck is connected in the cooperation, through the detection of radial force sensor to second four-jaw chuck loading power size, can realize the regulation of the radial loading power of piston ring, it is visible the utility model discloses can simulate the loading power that comes from compressed gas that the piston ring bore when actual work, through dynamic parameters such as real-time accurate detection moment of torsion, frictional force, temperature research actual work time radial loading power, compressed gas pressure is to the influence of cylinder liner-piston ring frictional wear performance promptly.

The utility model discloses can carry out cylinder liner-piston ring frictional wear test to conventional cylinder liner 1 or ladder cylinder liner 1 more than the two-stage, this embodiment explains with the cylinder liner-piston ring frictional wear test of 1 ladder cylinder liner 1 of two-stage, in the experiment, bent axle body 26 rotates drive piston rod and reciprocates along guide holder 5, thereby the piston rod drives the plug cover and makes the piston ring 3 of clamping on plug ring fixture 4 produce along the motion of 1 internal face of cylinder liner and grind, because plug ring fixture 4 corresponds the internal face setting of ladder cylinder liner 1 at different levels, therefore, the internal face homoenergetic of ladder cylinder liner 1 at different levels produces the friction with piston ring 3, the realization carries out frictional wear's test to multistage ladder cylinder liner and piston ring.

The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be equivalent replacement modes, and all are included in the scope of the present invention.

Claims

1. The utility model provides a cylinder liner-piston ring frictional wear test device which characterized in that includes: the piston rod extends into the cylinder sleeve, the inner radial adjusting mechanism is fixed on the piston rod, the plug ring clamping mechanism is arranged on the inner radial adjusting mechanism, the piston ring is installed on the plug ring clamping mechanism, and the piston ring is in contact with the inner wall surface of the cylinder sleeve; the cylinder sleeve is fixed on the cylinder body clamping mechanism, the cylinder body clamping mechanism is connected with the lifting mechanism, the end part of the piston rod, extending out of the opening of the cylinder sleeve, penetrates into the guide seat, and the crankshaft is in contact with the end part of the piston rod penetrating into the guide seat.

2. The cylinder liner-piston ring frictional wear test device of claim 1, wherein the cylinder clamping mechanism is a first chuck, the cylinder liner is fixed by the first chuck through a jaw, the first chuck is connected to the lifting mechanism, and a flange clamping surface is protruded on a clamping surface of the jaw of the first chuck;

3. The cylinder liner-piston ring frictional wear test device of claim 2, wherein the plug ring clamping mechanism comprises a clamping unit, the clamping unit is the same in number as the clamping jaws of the second chuck and is arranged in a one-to-one correspondence manner, the clamping unit comprises a base plate, a clamping plate, an assembling spring and a clamping bolt, the base plate is L-shaped, the vertical surfaces of the base plate of the clamping unit are respectively arranged on the clamping jaws of the second chuck, the clamping bolt penetrates through the transverse surfaces of the clamping plate and the base plate, a clamping groove is formed in one side surface of the clamping plate, a spring clamping area is formed between the lower portion of one side surface of the clamping plate and the transverse surface of the base plate, the assembling spring is arranged in the spring clamping area, the piston ring is clamped on the clamping groove of each clamping unit, the piston ring partially protrudes out of the clamping groove, and the piston ring protruding out of.

4. The cylinder liner-piston ring frictional wear test device of claim 3, wherein each clamping plate is provided with more than two clamping grooves along the height direction, the number of the piston rings is the same as that of the clamping grooves on each clamping plate, and each piston ring is clamped in the clamping grooves of the four clamping plates at the same height;

the first chuck and the second chuck are a four-jaw chuck, a two-jaw chuck, a three-jaw chuck or a six-jaw chuck.

5. The cylinder liner-piston ring frictional wear test device of claim 1, wherein the piston rod comprises a push rod, a plug sleeve, a lock sleeve nut, a guide flat key and an assembly driving mechanism, the outer surface of the push rod is provided with a shaft shoulder, the plug sleeve is sleeved on the push rod, one end of the plug sleeve is in contact with the shaft shoulder, the push rod is provided with a thread section, the lock sleeve nut is connected to the thread section so that the plug sleeve is fixed between the shaft shoulder and the lock sleeve nut from the other end of the plug sleeve, the push rod and the plug sleeve are correspondingly provided with a groove, a key groove is formed between the push rod and the groove of the plug sleeve, the guide flat key is arranged in the key groove, the assembly driving mechanism is connected with the plug sleeve when the plug sleeve is disassembled and assembled, and the assembly driving mechanism is used for pushing the plug sleeve out of the push rod or.

6. The cylinder liner-piston ring frictional wear test device of any one of claims 2-4, wherein the cylinder liner is a multi-stage stepped cylinder liner; the inner radial adjusting mechanisms are multiple, correspond to the inner wall of each stage of the stepped cylinder sleeve respectively and are arranged on the piston rod, and the piston ring is installed on each inner radial adjusting mechanism.

7. The cylinder liner-piston ring frictional wear test device of any one of claims 2-4, wherein the cylinder liner is a stepped cylinder liner having a first upper step and a first lower step, the number of the cylinder block clamping mechanisms is two, the two cylinder block clamping mechanisms are respectively arranged on the first upper step and the first lower step, the number of the lifting mechanisms is two, and the two cylinder block clamping mechanisms are respectively connected to the two lifting mechanisms;

8. The cylinder liner-piston ring frictional wear test device as recited in claim 7, wherein the piston rod comprises a push rod, a plug sleeve, a lock sleeve nut, a guide flat key and an assembly driving mechanism, the outer surface of the push rod is provided with a shaft shoulder, the plug sleeve is sleeved on the push rod, one end of the plug sleeve is in contact with the shaft shoulder, the push rod is provided with a threaded section, the lock sleeve nut is connected to the threaded section so as to limit the plug sleeve between the shaft shoulder and the lock sleeve nut from the other end of the plug sleeve, the push rod and the plug sleeve are correspondingly provided with a groove, a key groove is formed between the push rod and the groove of the plug sleeve, the guide flat key is arranged in the key groove, the assembly driving mechanism is connected with the plug sleeve when the plug sleeve is disassembled and assembled, and the assembly driving mechanism is used for pushing the plug sleeve out of the push;

9. The cylinder liner-piston ring frictional wear test device of claim 7, wherein the lifting mechanism comprises a servo motor, a ball screw and a lifting block, the servo motor is connected with the ball screw, the servo motor is used for driving the ball screw to rotate, the lifting block is connected with the ball screw through a threaded hole, and the two cylinder clamping mechanisms are respectively installed on the lifting blocks of the two lifting mechanisms.

10. The cylinder liner-piston ring frictional wear test device of claim 1, wherein the crankshaft comprises a crankshaft body, a pin shaft, a link rod, a driving motor with adjustable working power supply frequency and a torque sensor for detecting the output torque of the driving motor, the driving motor is connected with the crankshaft body, an assembly hole is axially formed in the end part of the piston rod penetrating into the guide seat, a pin shaft hole is radially formed in the end part of the piston rod penetrating into the guide seat, after the link rod penetrates into the assembly hole, the pin shaft penetrates into the pin shaft hole and penetrates through the link rod, so that the link rod is connected with the piston rod, the link rod is in contact with the crankshaft body, and the crankshaft body rotates so as to drive the piston rod to move up and down along the;