CN108362598B - Friction and wear test machine for multifunctional piston-cylinder sleeve system - Google Patents
Friction and wear test machine for multifunctional piston-cylinder sleeve system Download PDFInfo
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- CN108362598B CN108362598B CN201810454276.5A CN201810454276A CN108362598B CN 108362598 B CN108362598 B CN 108362598B CN 201810454276 A CN201810454276 A CN 201810454276A CN 108362598 B CN108362598 B CN 108362598B
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- 238000012360 testing method Methods 0.000 title claims abstract description 131
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- 230000001105 regulatory effect Effects 0.000 claims abstract description 10
- 239000000725 suspension Substances 0.000 claims abstract description 10
- 229910000831 Steel Inorganic materials 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 10
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- 230000008878 coupling Effects 0.000 claims description 9
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- 238000005299 abrasion Methods 0.000 description 3
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/56—Investigating resistance to wear or abrasion
- G01N3/567—Investigating resistance to wear or abrasion by submitting the specimen to the action of a fluid or of a fluidised material, e.g. cavitation, jet abrasion
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/022—Environment of the test
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- G01N2203/0226—High temperature; Heating means
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Abstract
The invention discloses a friction and wear test machine for a multifunctional piston-cylinder sleeve system, belongs to the field of mechanical friction and wear tests, and aims to solve the problems that the existing friction test machine cannot truly and reliably reflect the friction and wear condition and low friction force measurement precision in the actual working process of the piston-cylinder sleeve system, and the like, under the condition of non-actual ignition combustion, a speed regulating motor is used as a drive, and a simple open structure is adopted: special suspension cylinder sleeve, linear bearing type piston skirt, cylinder pressure analog-to-analog mechanism, piston ring radial force elastic adjustment structure, etc., high-accuracy simulation of the pressure, temperature, vibration, etc. of the actual working condition of the engine, friction and wear test of the piston-cylinder sleeve system and high-accuracy measurement of friction force are carried out, and the influence of the high temperature, vibration, etc. of the real engine on the test is avoided. In addition, the tester can also perform the related friction and wear test of the plunger type air compressor.
Description
Technical Field
The invention relates to a friction and wear test machine for a multifunctional piston-cylinder sleeve system, and belongs to the field of friction and wear test of materials.
Background
Piston-cylinder systems are used in a large number of applications in internal combustion engines, air compressors and the like. In particular, for an engine, the frictional wear of the piston-cylinder liner system occupies a large proportion of the overall mechanical loss, which is about 50% of the overall mechanical friction loss of the engine, and the frictional wear failure of the piston-cylinder liner system is a major cause of the mechanism damage. The application of the low friction technology of the piston-cylinder sleeve system has extremely important practical significance for reducing friction loss, reducing emission, improving the fuel economy of the internal combustion engine and prolonging the service life of the internal combustion engine.
Most of the existing friction and wear testing machines are friction and wear testing machines aiming at material properties, such as pin-disc friction testing machines and the like, and cannot fully reflect the friction and wear conditions in the running process of an engine piston-cylinder sleeve system. Moreover, for the test of the friction and wear of the piston-cylinder sleeve system, a simple crank-link mechanism is basically adopted at present, so that the researched friction pair realizes reciprocating motion; or the crank connecting rod is removed, a linear motor is adopted to drive the friction pair to linearly reciprocate, and the engine is ignited and burnt, so that the friction and wear test is carried out under the working condition of a true machine. These test modes are either too simple, the simulated engine has certain limitations, the test conditions are too far apart from the actual working conditions of the engine, and the frictional wear condition of the tested piston-cylinder sleeve system cannot be completely reflected; or as in the true machine test, the manufacturing and test cost is high, and especially the test precision is easily affected by the high temperature, high pressure, high speed, high pollution and the like of the engine. The frictional wear test machine with high reliability, durability, test accuracy and economy is required to be continuously carried out, and a great research subject is brought to enterprises, universities and the like for researching the frictional wear of the engine.
Therefore, the friction and wear test machine for the piston-cylinder sleeve system is accurate, reliable and high in cost performance, and is very significant in researching the friction and wear condition of the system under actual conditions.
Disclosure of Invention
The invention aims to solve the problem that the conventional friction and wear testing machine cannot fully and reliably reflect and test the friction and wear condition of a piston-cylinder sleeve system, and provides a multifunctional friction and wear testing machine for the piston-cylinder sleeve system, which overcomes the defects of a common crank-connecting rod mechanism and low testing precision of a power testing method, overcomes the limitation of measurement during ignition and combustion of a true engine of an engine, accurately simulates the friction and wear of a piston ring of the engine to a cylinder sleeve and a piston skirt to the cylinder sleeve through a simple simulation mechanism under the condition of no ignition of the true engine, and simultaneously measures the friction force between friction pairs (can be simultaneously carried out or can be carried out respectively), and has an accurate data measurement and acquisition function due to a reasonable and direct sensor arrangement mode. In addition, the tester can also simulate the friction wear of other types of piston-cylinder sleeve systems, such as the friction wear of the piston-cylinder sleeve system of an air compressor.
The invention aims at being realized by the following technical scheme, and the following technical scheme is combined with the accompanying drawings:
a friction and wear test tester of a multifunctional piston-cylinder sleeve system comprises a test tester bracket 1, a power part bracket 2, a variable-frequency speed regulating motor 3, a speed changer 4, a torque and rotation speed tester 5 and a tester supporting mechanism; the power part bracket 2 and the tester supporting mechanism are adjacently fixed on the tester bracket 1; the variable-frequency and rotating-speed adjustable motor 3, the transmission 4 and the torque rotating-speed tester 5 are sequentially and adjacently fixed on the power part bracket 2; the variable frequency rotation speed adjustable motor 3 is connected with the input end of the speed changer 4 through an elastic coupling, the output end of the speed changer 4 is connected with the torque rotation speed tester 5 through the elastic coupling, and the tester piston crank link mechanism 7 is connected with the torque rotation speed tester through the elastic coupling; the tester supporting mechanism comprises a supporting frame and a tester guiding sleeve supporting mechanism, the tester guiding sleeve supporting mechanism is installed in the supporting frame, a tester piston cylinder sleeve 7-4 is installed in the tester guiding sleeve supporting mechanism in a suspending mode, a testing friction sensor is directly connected with a friction pair, a high-strength spring 7-5 is installed at the top of a special tester piston 7-3, a tester piston crank connecting rod mechanism 7 is connected with a torque rotating speed tester 5, and testing of friction force between the friction pair and rotating speed of the crank connecting rod mechanism is completed through the testing of the friction force and the rotating speed of the crank connecting rod mechanism.
The supporting frame of the supporting mechanism of the testing machine comprises a supporting plate a7, a supporting plate b8 and a supporting plate c9, and the supporting plate a7, the supporting plate b8 and the supporting plate c9 are sequentially and parallelly fixed on the testing machine bracket 1; the tester guide sleeve 11 is mounted between the support plate b8 and the support plate c9 by bolts. The tester sleeve supporting mechanism comprises a tester sleeve guide sleeve 11, the tester sleeve guide sleeve 11 is respectively connected with the supporting plates a and b through bolts,
the friction and wear test tester for the multifunctional piston-cylinder sleeve system is characterized in that a plurality of force transducers are arranged on the support plate b8 and the support plate c9, the piston cylinder sleeve 7-4 of the tester is assembled with the guide sleeve 11 through steel balls to form a suspension cylinder sleeve, two ends of the piston cylinder sleeve 7-4 of the tester are contacted with the force transducers, and friction force between the special piston 7-3 of the tester and the piston cylinder sleeve 7-4 of the tester is tested.
The friction and wear test tester for the multifunctional piston-cylinder sleeve system is characterized in that a high-strength spring 7-5 is arranged between the top of a special piston 7-3 of the tester and a supporting plate c9, and the acting force of cylinder pressure on the top of the piston under the condition of different strokes of an engine is simulated by springs with different rigidities, so that the lateral pressure of the cylinder wall on which the skirt of the special piston 7-3 of the tester is subjected is obtained.
The friction and wear test tester for the multifunctional piston-cylinder sleeve system is characterized in that the outer periphery of the skirt part of a special piston 7-3 of the tester is in a linear rolling bearing form, and small steel balls 15 are arranged in the liner and roll and circulate in a rolling circulation groove.
The friction and wear test testing machine for the multifunctional piston-cylinder sleeve system is characterized in that an elastic pressure adjusting mechanism is arranged in the concave part of the front end of a special piston 7-3 of the testing machine.
The friction and wear test testing machine for the multifunctional piston-cylinder sleeve system comprises an elastic rubber 22, wherein the front end and the rear end of the elastic rubber 22 are respectively provided with a pad pressing plate 16, the pad pressing plates are fixed in the concave top of the front end of a special piston 7-3 of the testing machine through bolts 21, a segmented circular ring guard ring 20 is arranged on the periphery of the elastic rubber 22, a pressure sensor 19 is contacted with the outer part of the segmented circular ring guard ring 20, and the other end of the pressure sensor 19 is contacted with a piston ring 18 through pins 17.
The friction and wear test tester for the multifunctional piston-cylinder sleeve system is characterized in that a heating resistance wire 13 is wound on the periphery of a cylinder sleeve guide sleeve 11 of the tester.
The friction and wear test tester for the multifunctional piston-cylinder sleeve system is characterized in that a vibration excitation device 14 is arranged on a cylinder sleeve guide sleeve 11 of the tester.
The friction and wear test tester for the multifunctional piston-cylinder sleeve system is characterized in that a ring groove track is arranged on the periphery of a piston skirt of the tester, and a plurality of small steel balls 15 are contained in the ring groove track.
The friction and wear test tester for the multifunctional piston-cylinder sleeve system is characterized in that an oil pan 12 is arranged at the bottom of a piston connecting rod mechanism of the tester, and an oil pump mechanism and a heating resistance wire are arranged in the oil pan 12.
Drawings
FIG. 1 is a schematic diagram of an axial view of a structure of the present invention;
FIG. 2 is a schematic diagram illustrating the axial measurement of the structure of the present invention;
FIG. 3 is a schematic diagram showing an exploded structure of a piston-rod mechanism of the testing machine according to the present invention;
FIG. 4 is a schematic diagram of a piston-rod mechanism of the testing machine according to the present invention;
FIG. 5 is a schematic view of a supporting mechanism of the testing machine according to the present invention;
FIG. 6 is a schematic view of a suspension cylinder liner mechanism of the testing machine of the present invention;
FIG. 7 is a schematic view of a heating resistance wire and vibration exciter on a guide sleeve of a testing machine in the invention;
FIG. 8 is a cross-sectional view of a suspension cylinder liner mechanism of the testing machine for testing frictional wear of a cylinder liner in accordance with the present invention;
FIG. 9 is a partial cross-sectional view of a special piston for a testing machine for testing frictional wear of a cylinder liner and a piston ring in accordance with the present invention;
FIG. 10 is a cross-sectional view of a special piston of the testing machine for testing frictional wear of a cylinder liner in accordance with the present invention.
In the figure:
the test machine comprises a test machine support, a power part (a generator, a transmission and a torque rotation speed tester) support, a variable-frequency speed regulating motor, a transmission 4, a torque rotation speed tester 5, a support plate 6 a, a test machine piston crank link mechanism 7, a support plate 8 b, a support plate 9 c, a fastening screw 10, a test machine cylinder sleeve guide sleeve 11, an oil pan 12, a heating resistance wire 13, a vibration exciter 14, a small steel ball 15, a backing plate 16, a pin 17, a piston ring 18, a pressure sensor 19, a segment ring retainer 20, an adjusting bolt 21, elastic rubber 22, a test machine crankshaft 7-1, a test machine connecting rod 7-2, a test machine special piston 7-3, a test machine piston cylinder sleeve 7-4, a test machine cylinder sleeve guide sleeve 11, a high-strength spring 7-5, and load cells 8-1, 8-2, 8-3 and 8-4 on the support plate b, and 9-1, 9-2, 9-3 and 9-4 on the support plate c.
Detailed Description
The technical scheme of the invention is described below with reference to the accompanying drawings:
a friction and wear test tester of a multifunctional piston-cylinder sleeve system comprises a test tester bracket 1, a power part bracket 2, a variable-frequency speed regulating motor 3, a speed changer 4, a torque and rotation speed tester 5 and a tester supporting mechanism; the power part bracket 2 and the tester supporting mechanism are adjacently fixed on the tester bracket 1; the variable-frequency and rotating-speed adjustable motor 3, the transmission 4 and the torque rotating-speed tester 5 are sequentially and adjacently fixed on the power part bracket 2; the variable frequency rotation speed adjustable motor 3 is connected with the input end of the speed changer 4 through an elastic coupling, the output end of the speed changer 4 is connected with the torque rotation speed tester 5 through the elastic coupling, and the tester piston crank link mechanism 7 is connected with the torque rotation speed tester through the elastic coupling; the tester supporting mechanism comprises a supporting frame and a tester guiding sleeve supporting mechanism, the tester guiding sleeve supporting mechanism is installed in the supporting frame, a tester piston cylinder sleeve 7-4 is installed in the tester guiding sleeve supporting mechanism in a suspending mode, a testing friction sensor is directly connected with a friction pair, a high-strength spring 7-5 is installed at the top of a special tester piston 7-3, a tester piston crank connecting rod mechanism 7 is connected with a torque rotating speed tester 5, and testing of friction force between the friction pair and rotating speed of the crank connecting rod mechanism is completed through the testing of the friction force and the rotating speed of the crank connecting rod mechanism.
The supporting frame of the supporting mechanism of the testing machine comprises a supporting plate a7, a supporting plate b8 and a supporting plate c9, and the supporting plate a7, the supporting plate b8 and the supporting plate c9 are sequentially and parallelly fixed on the supporting frame 1 of the testing machine; the tester guide sleeve 11 is mounted between the support plate b8 and the support plate c9 by bolts. The tester sleeve supporting mechanism comprises a tester sleeve guide sleeve 11, the tester sleeve guide sleeve 11 is respectively connected with the supporting plates a and b through bolts,
the supporting plate b8 and the supporting plate c9 are respectively provided with a plurality of force measuring sensors, the testing machine piston cylinder sleeve 7-4 is assembled with the guide sleeve 11 through steel balls to form a suspension cylinder sleeve, two ends of the testing machine piston cylinder sleeve 7-4 are in contact with the force measuring sensors arranged on the supporting plate, and friction force between the testing machine special piston 7-3 and the testing machine piston cylinder sleeve 7-4 is tested. Four pressure sensors 8-1, 8-2, 8-3 and 8-4 are arranged on the supporting plate b8, and four pressure sensors 9-1, 9-2, 9-3 and 9-4 and 8 pressure sensors are arranged on the supporting plate c9 and used for testing friction force between a piston ring and a piston skirt on a special piston 7-3 of the testing machine and a piston cylinder sleeve 7-4 of the testing machine.
The friction and wear test tester for the multifunctional piston-cylinder sleeve system is characterized in that a high-strength spring 7-5 is arranged between the top of a special piston 7-3 of the tester and a supporting plate c9, and the acting force of cylinder pressure on the top of the piston under the condition of different strokes of an engine is simulated by springs with different rigidities, so that the lateral pressure of the cylinder wall on which the skirt of the special piston 7-3 of the tester is subjected is obtained.
The friction and wear test tester for the multifunctional piston-cylinder sleeve system is characterized in that the outer periphery of the skirt part of a special piston 7-3 of the tester is in a linear rolling bearing form, and small steel balls 15 are arranged in the liner and roll and circulate in a rolling circulation groove.
The friction and wear test testing machine for the multifunctional piston-cylinder sleeve system is characterized in that an elastic pressure adjusting mechanism is arranged in the concave part of the front end of a special piston 7-3 of the testing machine.
The friction and wear test testing machine for the multifunctional piston-cylinder sleeve system comprises an elastic rubber 22, wherein a cushion pressing plate 16 is arranged at the front end and the rear end of the elastic rubber 22 respectively, the elastic rubber is fixed in a concave top of the front end of a special piston 7-3 of the testing machine through a bolt 21, a segmented ring guard ring 20 is arranged on the periphery of the elastic rubber 22, one end of a pressure sensor 19 is contacted with the segmented ring guard ring 20, and the other end of the pressure sensor is contacted with a piston ring 18 through a pin 17.
The friction and wear test tester for the multifunctional piston-cylinder sleeve system is characterized in that a heating resistance wire 13 is wound on the periphery of a cylinder sleeve guide sleeve 11 of the tester.
The friction and wear test tester for the multifunctional piston-cylinder sleeve system is characterized in that a vibration excitation device 14 is arranged on a cylinder sleeve guide sleeve 11 of the tester.
The friction and wear test tester for the multifunctional piston-cylinder sleeve system is characterized in that a ring groove track is arranged on the periphery of a piston skirt of the tester, and a plurality of small steel balls 15 are contained in the ring groove track.
The friction and wear test tester for the multifunctional piston-cylinder sleeve system is characterized in that an oil pan 12 is arranged at the bottom of a piston connecting rod mechanism of the tester, and an oil pump mechanism and a heating resistance wire are arranged in the oil pan 12.
The variable frequency speed regulating motor 3 drives the speed changer 4 and the torque rotating speed tester 5, thereby driving the crank connecting rod mechanism 7 in fig. 3 to move, the high-strength spring 7-5 in fig. 3 acts on the top of the special piston 7-3 of the tester, the special piston of the tester and the cylinder sleeve 7-4 of the tester in fig. 8 move mutually and interact to form a friction pair, the friction abrasion test of the piston-cylinder sleeve group is completed along with the rotation of the variable frequency speed regulating motor 3, and the friction force of the friction pair is tested directly through the load cells 8-1, 8-2, 8-3 and 8-4 on the support plate b and the load cells 9-1, 9-2, 9-3 and 9-4 on the support plate c in fig. 5.
The technical scheme of the invention is as follows:
1. and (3) performing a friction and wear test between the piston ring and the cylinder sleeve and testing: the variable-frequency speed regulating motor 3 drives the speed changer 4 and the torque rotating speed tester 5 to drive the piston crank connecting rod mechanism of the tester shown in fig. 4, so that the special piston 7-3 of the tester shown in fig. 9 and the suspension cylinder sleeve shown in the form of the piston cylinder sleeve 7-4 of the tester shown in fig. 8 move, and a sliding friction pair between the special piston 7-3 and the suspension cylinder sleeve is a piston ring and a cylinder sleeve, so that the friction force is relatively high; the rolling friction pair is a small steel ball and a cylinder sleeve of a skirt linear bearing of a special piston 7-3 of a special type tester, and the high-strength spring 7-5 is removed at the moment, so that the rolling friction force is relatively small. The friction between the suspension cylinder liner and the piston ring 18 was tested by the load cells 8-1, 8-2, 8-3, 8-4 on support plate b and the load cells 9-1, 9-2, 9-3, 9-4 on support plate c in fig. 5.
2. Friction and wear tests between the piston skirt and the cylinder sleeve are carried out, and the friction and wear tests are carried out: in fig. 4, a conventional piston assembly is installed, a piston ring of the conventional piston assembly is removed, and a high-strength spring 7-5 is installed between the head of a piston 7-3 and a supporting plate 9, in this case, in the crank-link mechanism of fig. 4, a piston skirt and a cylinder sleeve are in contact with each other and move relatively, forming a friction pair, and a friction wear test and a friction force test are performed.
3. Simulating friction and wear of a piston-cylinder sleeve group: and a conventional piston assembly is installed, a high-strength spring 7-5 is installed between the head of the piston 7-3 and the supporting plate 9, and the normal operation is carried out, so that a friction and wear test and a friction force test are carried out.
4. The high-strength spring 7-5 in fig. 3 is installed to simulate the pressure of air pressure to the piston top when the actual engine ignites and burns by the pressure of the spring to the piston top, and loads springs with different rigidities to obtain the side pressure of the piston skirt to the cylinder wall surface when the actual engine works under the power condition of the simulated engine (such as a high-rigidity spring is used in a power stroke and a relatively low-rigidity spring is used in a compression stroke), so that a friction and wear test of the piston-cylinder sleeve system is obtained, and the friction of the piston-cylinder sleeve system under the condition is tested.
5. In fig. 7, a heating resistance wire 13 and a vibration exciter 14 can be installed on the cylinder sleeve guide sleeve 11 of the testing machine to heat the cylinder sleeve and apply vibration with a certain frequency, and the heating resistance wire and the vibration exciter and the heating couple in the oil pan 12 further simulate the temperature and vibration under the real running condition of the engine, and the friction and wear of the piston-cylinder sleeve group.
6. The radial force of the piston ring is adjusted by an adjusting bolt 21 in fig. 10 to adjust the axial distance between the pressure pad 16 and the elastic rubber 22 along the piston, so as to generate radial displacement of the rubber, the radial force is transmitted to one end of the pressure sensor 19 through a segmented ring retainer 20 arranged on the periphery, the other end of the pressure sensor 19 is contacted with the piston ring 18 through a pin 17, and the radial force is transmitted to the piston ring, so that the control of the radial force of the piston ring on the cylinder wall is realized.
The invention has the following advantages:
1. by means of a simple structure, the pressure, vibration, heat and other conditions of an actual engine are simulated, and under the condition of non-ignition combustion, the friction and abrasion of a piston-cylinder sleeve system under the actual working condition of the engine are simulated to the greatest extent; simultaneously measuring the friction force;
2. the test machine is open, can be conveniently disassembled and assembled, and is convenient to load, so that the measurement has pertinence and accuracy, for example, the friction force of the piston ring to the cylinder sleeve and the friction force of the piston skirt to the cylinder sleeve can be respectively tested through different installation combinations of the piston-cylinder sleeve system, and the influence of the simultaneous action of the piston skirt and the cylinder sleeve to the cylinder sleeve is considered. Meanwhile, a new type of piston-cylinder sleeve system can be matched on the equipment;
3. the suspension cylinder sleeve is adopted, and the sensor is arranged in a targeted manner, so that the friction force of the friction pair can be directly tested, and the friction abrasion of the piston-cylinder sleeve system is researched more accurately and truly.
In conclusion, the test machine has the advantages of simple structure, convenience in manufacturing, accuracy in test and the like, and has high reliability, durability and economy.
Claims (3)
1. The multifunctional friction and wear test tester for the piston-cylinder sleeve system is characterized by comprising a tester bracket (1), a power part bracket (2), a variable-frequency speed regulating motor (3), a transmission (4), a torque and rotation speed tester (5) and a tester supporting mechanism; the variable-frequency speed regulating motor (3) is connected with the input end of the speed changer (4) through an elastic coupling, the output end of the speed changer (4) is connected with the torque tester (5) through the elastic coupling, and the piston connecting rod mechanism (7) of the tester is connected with the torque tester through the elastic coupling; the testing machine supporting mechanism comprises a supporting frame and a testing machine sleeve supporting mechanism, a testing machine piston cylinder sleeve (7-4) is arranged in the testing machine guide sleeve supporting mechanism in a suspending mode, a force measuring sensor is directly connected with a friction pair, a piston crank connecting rod mechanism (7) is connected with a torque rotating speed tester (5), and the testing of friction force between the friction pair and the rotating speed of the crank connecting rod mechanism is completed through the two;
the supporting frame of the supporting mechanism of the testing machine comprises a supporting plate a (7), a supporting plate b (8) and a supporting plate c (9), and the supporting plate a (7), the supporting plate b (8) and the supporting plate c (9) are sequentially and parallelly fixed on the supporting frame (1) of the testing machine; the test machine cylinder sleeve guide sleeve (11) is arranged between the support plate b (8) and the support plate c (9) through bolts; the bearing plate b (8) and the bearing plate c (9) are respectively provided with a plurality of force transducers, the testing machine piston cylinder sleeve (7-4) is assembled with the testing machine cylinder sleeve guide sleeve (11) through steel balls to form a suspension cylinder sleeve, two ends of the testing machine piston cylinder sleeve (7-4) are contacted with the force transducers, and the friction force between the testing machine special piston (7-3) and the testing machine piston cylinder sleeve (7-4) is generated; a high-strength spring (7-5) is arranged between the top of the special piston (7-3) of the testing machine and the supporting plate c (9), and the acting force of cylinder pressure on the top of the piston under the condition of different strokes of the engine is simulated by springs with different rigidities, so that the lateral pressure of the cylinder wall borne by the skirt part of the special piston (7-3) of the testing machine is obtained;
an elastic pressure regulating mechanism is arranged in the concave part of the front end of the special piston (7-3) of the testing machine; the elastic pressure adjusting mechanism comprises elastic rubber (22), a cushion pressing plate (16) is arranged at the front end and the rear end of the elastic rubber (22) respectively, the elastic rubber is fixed in a concave top at the front end of a piston cylinder sleeve (7-3) of the testing machine through bolts (21), a segmented circular ring guard ring (20) is arranged on the periphery of the elastic rubber (22), a pressure sensor (19) is arranged on the outer portion of the segmented circular ring guard ring (20) in a contact mode, and the other end of the pressure sensor (19) is in contact with a piston ring (18) through pins (17).
2. A friction and wear test machine for a multifunctional piston-cylinder sleeve system according to claim 1, characterized in that the outer periphery of the skirt of the special piston (7-3) of the test machine is in the form of a linear rolling bearing, and small steel balls (15) are arranged in the skirt to roll and circulate in a rolling circulation groove.
3. A multifunctional piston-cylinder system friction and wear test machine according to claim 1, characterized in that a vibration exciter (14) is mounted on the cylinder liner guide sleeve (11) of the test machine; and a heating resistance wire (13) is wound on the periphery of the cylinder sleeve guide sleeve (11) of the testing machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810454276.5A CN108362598B (en) | 2018-05-14 | 2018-05-14 | Friction and wear test machine for multifunctional piston-cylinder sleeve system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810454276.5A CN108362598B (en) | 2018-05-14 | 2018-05-14 | Friction and wear test machine for multifunctional piston-cylinder sleeve system |
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| CN108362598A CN108362598A (en) | 2018-08-03 |
| CN108362598B true CN108362598B (en) | 2024-01-09 |
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