CN112730127B - Multi-working-condition ring block friction testing machine - Google Patents
Multi-working-condition ring block friction testing machine Download PDFInfo
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- CN112730127B CN112730127B CN202011436713.4A CN202011436713A CN112730127B CN 112730127 B CN112730127 B CN 112730127B CN 202011436713 A CN202011436713 A CN 202011436713A CN 112730127 B CN112730127 B CN 112730127B
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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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N19/00—Investigating materials by mechanical methods
- G01N19/02—Measuring coefficient of friction between materials
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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
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Abstract
The invention provides a multi-working-condition ring block friction testing machine which comprises a screw rod sliding table assembly, a pressure loading assembly, a friction detection assembly and a ring block loading assembly, wherein the screw rod sliding table assembly is arranged on the screw rod sliding table assembly; the ring block loading assembly comprises a ring block mounting seat and a ring block motor, the pressure loading assembly comprises a pressurizing mechanism, a swinging mechanism and a friction mechanism which are sequentially connected in series, the friction mechanism is positioned above the ring block mounting seat, a test block fixture is arranged at the lower end of the friction mechanism, the left side and the right side of the friction mechanism are fixedly connected with a collision nail, the pressurizing mechanism is of an elastic structure, the swinging mechanism can swing in the left-right direction, a screw rod sliding table capable of moving up and down is arranged in the screw rod sliding table assembly, the screw rod sliding table is connected with an upper plate of the pressurizing mechanism, the friction detection assembly is provided with friction force sensors which are bilaterally symmetrical, the two friction force sensors are respectively positioned at the left side and the right side of the friction mechanism and are in contact fit with the collision nails at the two sides; the friction tester belongs to a universal type and can simulate various complex friction working conditions such as acceleration, reversing, sudden stop, variable load, impact and the like.
Description
Technical Field
The invention belongs to the technical field of material performance testing equipment, and particularly relates to a multi-working-condition ring block friction testing machine.
Background
The ring block friction testing machine is a device for detecting the friction performance of a material, and the friction performance parameters of the material to be tested are obtained by processing the material to be tested into a friction test block and a friction ring block and performing friction tests on the friction test block and the friction ring block.
The existing universal ring block friction testing machine is simple in structure and can only perform constant-speed friction test under constant pressure. In actual production life, friction forms of various sliding parts are complex, for example, parts such as a plunger, a bearing and a rim can experience normal impact, braking, speed change, high-speed reversing and other complex working conditions in actual work, and material abrasion caused by the complex working conditions is greatly different from abrasion in a constant-speed uniform load state.
In order to research the influence of the complex working conditions on the friction performance of the material, a special friction testing machine is designed according to the use environment of the tested part in the traditional method, and the testing machine is narrow in application range, large in limitation and incapable of being popularized and used. Therefore, a universal type ring block friction tester capable of testing the friction performance of materials under complex working conditions needs to be developed.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a multi-working-condition ring block friction tester which is used for meeting the requirement of researching the friction performance of a material under a complex working condition.
The present invention achieves the above technical objects by the following technical means.
A multi-working-condition ring block friction testing machine comprises a screw rod sliding table assembly, a pressure loading assembly, a friction detection assembly and a ring block loading assembly;
the ring block loading assembly comprises a ring block mounting seat and a ring block motor, the ring block mounting seat is connected with the ring block motor, and the ring block mounting seat can rotate along the left and right directions of the friction tester;
the pressure loading assembly comprises a pressurizing mechanism, a swinging mechanism and a friction mechanism; the friction mechanism is positioned above the ring block mounting seat, a test block clamp is arranged at the lower end of the friction mechanism, and the left side and the right side of the friction mechanism are fixedly connected with collision nails; the pressurizing mechanism comprises an upper plate and a lower plate which are connected through an elastic device in the vertical direction; the swing mechanism comprises an upper swing arm and a lower swing arm, and the two swing arms can swing in the left-right direction; the pressurizing mechanism and the swinging mechanism are connected in series at the upper end of the friction mechanism;
a screw rod sliding table capable of moving up and down is arranged in the screw rod sliding table assembly and is connected with an upper plate of the pressurizing mechanism;
the friction detection assembly is provided with a pair of friction force sensors which are bilaterally symmetrical, the two friction force sensors are respectively positioned on the left side and the right side of the friction mechanism, and the two friction force sensors can be respectively in contact fit with the collision nails on the two sides.
Further, the screw rod sliding table assembly is fixed on the base through the vertical seat, and the screw rod sliding table assembly is fixed on the front face of the vertical seat; the ring block mounting seat is fixed at the bottom of the front face of the vertical seat through a ring block bearing, and the ring block motor is fixed at the bottom of the back face of the vertical seat.
Further, lead screw slip table subassembly still includes lead screw and lead screw motor, the vertical setting of lead screw, lead screw and lead screw slip table cooperation are connected, and the lead screw upper end is connected with the lead screw motor.
Furthermore, a micro-displacement mechanism is connected between the pressurizing mechanism and the swinging mechanism in series, and the upper panel and the lower panel of the micro-displacement mechanism can move in the left-right direction.
Further, a load sensor is connected in series between the swing mechanism and the friction mechanism.
Furthermore, the collision nails are fixed on two sides of the friction mechanism through collision nail supports which are of inverted U-shaped structures.
Furthermore, the friction mechanism comprises a friction upper support and a friction lower support, the friction upper support and the friction lower support are connected through dovetail tenon structures in the front-back direction, and dovetail locking nuts are arranged on the dovetail tenon structures; the test block clamp is fixed at the lower end of the friction lower support.
Furthermore, the front surface of the friction lower support is connected with a temperature sensor through a temperature support, and a probe of the temperature sensor points to the friction area.
Furthermore, the friction detection assembly is of a bilaterally symmetrical structure and is fixed on the base through a left sliding seat and a right sliding seat; the friction detection assembly comprises a lower detection sliding table which is connected to a sliding rail of the sliding seat in a sliding manner; the sliding structure in the left and right directions is arranged on the lower detection sliding table, the locking structure is arranged on the sliding structure, and the friction force sensor is connected to the lower detection sliding table in a sliding mode through the sliding structure.
Furthermore, the friction detection assembly also comprises an upper detection sliding table which is connected to the sliding rail in a sliding manner; the upper detection sliding table is positioned above the lower detection sliding table and is connected with the lower detection sliding table through a connecting plate; the connecting plate is provided with a connecting plate sliding groove and a connecting plate locking nut and is used for adjusting and locking the distance between the lower detection sliding table and the upper detection sliding table; the upper end of the upper detection sliding table is connected with a lower plate of the pressurizing mechanism through an upper detection connecting rod.
The invention has the beneficial effects that:
(1) the invention provides a multi-working-condition ring block friction testing machine, which is a universal friction testing machine suitable for various friction test blocks and friction ring blocks, wherein a pressurizing mechanism with an elastic device is used for providing downward pressure, and the downward pressure is adjusted by the up-and-down sliding of a screw rod sliding table, so that the testing machine can still adjust the load at any time in the friction testing process, and compared with the traditional mode of additionally installing weights, the adjustment can realize continuous adjustment of the load; meanwhile, the normal impact effect which cannot be achieved by a traditional test machine can be simulated by utilizing the pressure loading assembly and a short-time rapid pressurization and decompression mode. The left side and the right side of the lower end of the swing mechanism are symmetrically provided with the collision nails, the friction force sensors are in contact fit with the collision nails, the friction force is sensed, the ring block is rotated forwards and backwards or accelerated, and suddenly stopped, and the friction condition can be accurately sensed; in the invention, the swing mechanism mainly has the function of enabling the impact nail to deviate left and right so as to press the friction force sensor contacted with the impact nail, and although the transverse sliding structure can achieve the effect, the swing mechanism is adopted in the invention, and the impact nail can be automatically returned to the initial balance position under the action of gravity moment when not being influenced by external force, so that additional reset components are saved, and the structure of the device is simplified.
(2) The screw rod sliding table is driven to move up and down through the rotation of the screw rod, the screw rod is driven to rotate forwards or backwards through the screw rod motor, and the screw rod motor can be directly and automatically controlled by a computer, so that various complicated load changes or normal impact conditions in reality can be simulated.
(3) According to the invention, the micro-displacement mechanism is arranged, so that fine adjustment of the friction test block in the left and right directions can be realized, the friction test block is easier to adjust to a stress balance position in the middle, and convenience is brought to improvement of the accuracy of the friction test.
(4) The pressure loading assembly is provided with the load sensor, and the load data acquired by the load sensor provides convenience for a computer to accurately control the size of the load.
(5) The friction mechanism is provided with the dovetail structure capable of moving in the front-back direction, so that convenience is brought to the adjustment of the front-back position of the friction test block, and the friction tester can be adapted to friction test blocks or friction ring blocks with different sizes.
(6) The friction testing machine is provided with the temperature sensor, so that the temperature rise condition of the friction area can be sensed, and the friction performance of the material can be known in multiple dimensions.
(7) The friction detection assembly comprises an upper detection sliding table and a lower detection sliding table, the distance between the two detection sliding tables is adjustable, and the two detection sliding tables are connected with the pressure loading assembly through the upper sliding table, so that the relative positions of all movable parts can be kept relatively fixed, after the positions of all parts are adjusted once, when the friction test block or the friction ring block is replaced and other friction tests are carried out, the positions of all parts do not need to be adjusted again, the replacement procedure is simplified, and the usability of the device is improved.
Drawings
FIG. 1 is a structural view of a ring block friction tester according to the present invention;
FIG. 2 is a block diagram of the assembled position of the sample loading assembly of the present invention;
FIG. 3 is a block diagram of the lead screw slide assembly of the present invention;
FIG. 4 is an assembled position view of the screw slide assembly of the present invention;
FIG. 5 is a block diagram of the pressure loading assembly of the present invention;
FIG. 6 is a structural view of a pressing mechanism of the present invention;
FIG. 7 is a schematic view of the pressing mechanism of the present invention in an active state;
FIG. 8 is a structural view of a micro-displacement mechanism and a swing mechanism according to the present invention;
FIG. 9 is a connection diagram of the load cell of the present invention;
FIG. 10 is a structural view of the friction mechanism of the present invention;
FIG. 11 is an assembled position view of the pressure loading assembly of the present invention;
FIG. 12 is an assembled position view of the friction detecting assembly of the present invention;
FIG. 13 is an assembled relationship view of the friction detecting assembly of the present invention;
FIG. 14 is a block diagram of the friction detecting assembly of the present invention;
FIG. 15 is a view of the lower inspection slide of the present invention;
FIG. 16 is a view showing the assembly of the friction detecting assembly and the pressure loading assembly according to the present invention;
FIG. 17 is a diagram showing the state of use of the ring block friction tester of the present invention;
FIG. 18 is a drawing showing the relationship between the friction test block and the friction ring block when the present invention is in use;
FIG. 19 is a view showing the relationship between the friction lifters and the striker in use of the present invention;
reference numerals:
1-a screw rod sliding table assembly; 11-a screw base; 12-a lead screw slide rail; 13-a screw rod sliding table;
14-a screw rod; 15-a coupler; 16-a screw motor;
2-a pressure loading assembly; 21-a pressurizing mechanism; 211-a pressure mounting plate; 212-a pressure baseplate;
213-a spring; 214-a guide post;
22-micro displacement mechanism; 221-micro-displacement upper plate; 222-micro-displacement lower plate; 223-micro displacement knob;
23-a swing mechanism; 231-upper swing arm; 232-a rotation pin; 233-lower swing arm;
24-a load cell; 25-a nail striking mechanism; 251-a staple holder; 252-knocking in the nail;
26-a friction mechanism; 261-friction upper support; 262-dovetail joint; 263-friction lower support;
264-temperature support; 265-temperature sensor; 266 test block clamp; 267-dovetail locking nuts;
268-a wing bolt;
3-a friction detecting assembly; 31-upper detection slipway; 311-upper detection link;
32-lower detection slipway; 321-a friction guide rail; 322-friction runner; 323-friction slide;
324-friction lock nut; 325-a friction force sensor; 326-friction top block;
33-a connecting plate; 331-link plate chute; 332-link plate lock nut;
4-a ring block loading assembly; 41-ring block mounting seat; 42-ring block bearings; 43-bad block motor;
51-a base; 52-a slide; 521-a slide rail; 53-vertical seat;
61-friction ring block; 62-rub the test block.
Detailed Description
Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
The ring block friction testing machine shown in fig. 1 comprises a screw rod sliding table assembly 1, a pressure loading assembly 2, a friction detection assembly 3 and a ring block loading assembly 4, wherein the screw rod sliding table assembly 1 and the ring block transferring assembly 4 are fixed on a base 51 through a vertical seat 53, the pressure loading assembly 2 is fixed on the inner side of the screw rod sliding table assembly 1, and the friction detection assembly 3 is fixed on the base 51 through a sliding seat 52; fig. 1 shows the front side of the ring block friction tester, where the operator manipulates the machine.
As shown in fig. 2, the vertical base 53 includes a vertical flat plate, two parallel rib plates are disposed on the back surface of the flat plate (i.e., the left side surface of fig. 2) for enhancing the supporting function of the flat plate, and both the flat plate and the rib plates are fixed on the bottom plate; the ring block loading assembly 4 comprises a ring block mounting seat 41, a ring block bearing 42 and a ring block motor 43, the ring block motor 43 is fixed on a bottom plate between two rib plates, the ring block bearing 42 is fixed on the bottom plate on one side of the front face of the vertical seat flat plate, the ring block mounting seat 41 sequentially penetrates through the ring block bearing 42 and the vertical seat flat plate and then is connected with an output shaft of the ring block motor 43, and the ring block mounting seat 41 is used for mounting and fixing a friction ring block 61.
The screw rod sliding table assembly 1 shown in fig. 3 comprises a screw rod base 11, a screw rod 14, a screw rod sliding table 13 and a screw rod motor 16; the front surface (namely the front surface of fig. 3) of the screw rod base 11 is provided with two screw rod slide rails 12 which are arranged along the vertical direction, a screw rod sliding table 13 is connected with the screw rod slide rails 12 in a sliding manner, a screw rod 14 is vertically fixed between the two screw rod slide rails 12 and is connected with the screw rod sliding table 13 in a matching manner, a screw rod motor 16 is fixed at the top end of the screw rod base 11, and an output shaft of the screw rod motor 16 is vertically downward and is connected with the top end of the screw rod 14 through a coupler 15; the screw rod motor 16 drives the screw rod 14 to rotate forward and backward, so that the screw rod sliding table 13 moves up and down.
As shown in fig. 4, the screw sliding table assembly 1 is installed on the vertical base 53, wherein the back surface of the screw base 11 is fixedly connected with the front surface of the flat plate of the vertical base 53, and the screw sliding table assembly 1 is located above the ring block bearing 42.
As shown in fig. 5, the pressure loading assembly 2 includes, in order from top to bottom, a pressurizing mechanism 21, a micro-displacement mechanism 22, a swinging mechanism 23, a load sensor 24, a nail striking mechanism 25, and a friction mechanism 26.
As shown in fig. 6, the pressurizing mechanism 21 includes a pressurizing mounting plate 211 and a pressurizing base plate 212, the pressurizing mounting plate 211 is in an inverted L shape, a spring 213 and a guide post 214 are arranged between the horizontal portion of the pressurizing mounting plate 211 and the pressurizing base plate 212, the spring 213 is located at the center, and four guide posts 214 are arranged around the pressing base plate 212; the guide post 214 penetrates through the pressurizing base plate 212, and the upper end of the guide post 214 is fixedly connected with the pressurizing mounting plate 211.
As shown in fig. 7, the pressing base plate 212 can slide up and down along the guide posts 214 with respect to the pressing mounting plate 211, and compress or extend the springs 213 during the movement.
As shown in fig. 8, the micro-displacement mechanism 22 includes a micro-displacement upper plate 221, a micro-displacement lower plate 222 and a micro-displacement knob 223, the micro-displacement lower plate 222 is movably connected below the micro-displacement upper plate 221, and the micro-displacement lower plate 222 can move left and right relative to the micro-displacement upper plate 221 by screwing the micro-displacement knob 223; the micro displacement mechanism 22 is a conventional mechanism for precisely adjusting the micro displacement amount, and the specific structure thereof is not described in detail; when the micro-displacement mechanism 22 is installed below the pressing mechanism 21, the micro-displacement upper plate 221 is fixedly connected to the pressing base plate 212.
The swing mechanism 23 comprises an upper swing arm 231 and a lower swing arm 233, and the upper swing arm 231 and the lower swing arm 233 are connected through a rotating pin 232; the upper swing arm 231 is fixedly connected below the micro-displacement lower plate 222, and the lower swing arm 233 swings in the left-right direction relative to the swing direction of the upper swing arm 231.
The load sensor 24 is fixedly connected below the lower swing arm 233; the nail striking mechanism 25 comprises a nail striking support 251 and a nail striking 252, the nail striking support 251 is in an inverted U shape, the middle of the nail striking support 251 is fixedly connected below the load sensor 24, the lower ends of the left side and the right side of the nail striking support 251 are respectively provided with one nail striking 252, and the tip of the nail striking 252 faces outwards.
As shown in fig. 9, the friction mechanism 26 includes a friction upper support 261 and a friction lower support 263, the friction upper support 261 is fixedly connected with the lower surface of the middle part of the staple holder 251, and the friction mechanism 26 is located inside the inverted U-shaped structure of the staple holder 251; the lower end of the friction upper support 261 is provided with a dovetail groove in the front-back direction, the upper end of the friction lower support 263 is provided with a dovetail 262 matched with the dovetail groove, and the friction lower support 263 is connected below the friction upper support 261 through the matching of the dovetail groove and the dovetail 262; the front surface of the lower friction support 263 is connected with a temperature sensor 265 through a temperature bracket 264.
As shown in fig. 10, a dovetail lock nut 267 is provided on the side of the friction upper seat 261 for locking the dovetail 262 in the dovetail groove, so that the friction lower seat 263 is fixed in the front-rear position with respect to the friction upper seat 261; the lower end of the lower friction support 263 is provided with a test block clamp 266, the side surface of the test block clamp 266 is provided with a wing-shaped bolt 268, the test block clamp 266 can be opened and closed by screwing the wing-shaped bolt 268, the test block clamp 266 is used for clamping the friction test block 62, and after the friction test block 62 is clamped, a detection head of the temperature sensor 265 points to the friction area of the friction test block 62.
As shown in fig. 11, the pressure loading assembly 2 is mounted on the screw sliding table assembly 1 through the pressurizing mechanism 21, wherein the back surface of the vertical portion of the pressurizing mounting plate 211 is fixedly connected with the front surface of the screw sliding table 13.
As shown in fig. 12, the friction detecting unit 3 and the carriage 52 are a pair that is bilaterally symmetrical.
As shown in fig. 13, a side of the slide base 52 opposite to the other slide base is provided with a slide rail 521 in a vertical direction, the friction detecting assembly 3 includes an upper detecting slide table 31 and a lower detecting slide table 32, both of which are slidably connected to the slide rail 521, and the upper detecting slide table 31 is located above the lower detecting slide table 32.
As shown in fig. 14, the upper detection sliding table 31 is connected with the lower detection sliding table 32 through a connecting plate 33, wherein the upper detection sliding table 31 is fixedly connected with the connecting plate 33, a connecting plate chute 331 is arranged on the connecting plate 33 in the vertical direction, the lower detection sliding table 32 is movably connected with the connecting plate 33 through the connecting plate chute 331, and a connecting plate locking nut 332 is further arranged on the connecting plate chute 331 and used for locking and fixing the connecting plate 33 and the lower detection sliding table 32; the upper end of the upper detection sliding table 31 is provided with a Z-shaped upper detection connecting rod 311.
As shown in fig. 15, a C-shaped friction guide rail 321 is arranged on a side surface of the lower detection sliding table 32, a C-shaped notch of the friction guide rail 321 faces a side far away from the lower detection sliding table 32, a transverse friction sliding groove 322 is arranged on each of the upper and lower guide rails of the friction guide rail 321, and a friction sliding block 323 is connected to the friction guide rail 321 in a sliding manner; a friction locking nut 324 is arranged on the friction chute 322 and used for locking and fixing the friction sliding block 323 and the friction guide rail 321; one side of the friction sliding block 323 away from the lower detection sliding table 32 is connected with a friction force sensor 325, and one side of the friction force sensor 325 away from the lower detection sliding table 32 is connected with a friction force top block 326.
As shown in fig. 16, the friction detecting assemblies 3 symmetrically arranged on the left and right sides are connected to the pressure loading assembly 2, wherein the upper ends of the upper detecting connecting rods 311 on the two sides are fixedly connected to the lower ends of the left and right sides of the pressurizing base plate 212, respectively; with the above connection, the relative height between the friction top block 326 and the striker 252 is kept constant.
The using process of the invention is as follows:
(1) machine setting:
as shown in fig. 17 and 18, the friction ring block 61 and the friction test block 62 to be detected are respectively mounted on the ring block mounting base 41 and the test block clamp 266, wherein the friction test block 62 is clamped by the test block clamp 266 by screwing the wing bolt 268; moving down the pressure loading assembly 2 so that the friction test block 62 is pressed above the friction ring block 61; the left and right positions of the micro-displacement mechanism 22 are adjusted by screwing the micro-displacement knob 223, so that the friction test block 62 is positioned in the middle of the middle, and the left and right sides are balanced and do not deflect when the friction test block 62 presses the friction ring block 61 downwards in the positive direction; the front and back positions of the friction test block 62 are adjusted through the front and back sliding of the dovetail 262, and the friction test block 62 is fixed at the position with the largest friction contact area with the friction ring block 61 through the dovetail locking nut 267, namely as shown in fig. 18; the upper and lower positions of the friction top block 326 are adjusted by the up-and-down sliding of the lower detection sliding table 32 along the connecting plate sliding groove 331, and the friction top block 326 is fixed at the same horizontal position of the knocking pin 252 by the connecting plate locking nut 332; the left and right positions of the friction force abutting block 252 are adjusted by sliding the friction slider 323 along the friction guide rail 321, and the friction force abutting block 326 is fixed at a position where it is just in contact with the striker 252 but there is no compression and the reading of the friction force sensor is zero by the friction lock nut 324, that is, as shown in fig. 19.
(2) Simulation test:
after the friction testing machine is adjusted and arranged according to the requirements, the machine is started; the ring block motor 43 drives the ring block mounting base 41 to rotate, so that the friction ring block 61 and the friction test block 62 are rubbed; the screw rod motor 16 drives the screw rod 14 to rotate, so that the screw rod sliding table 13 is lifted up or down, and the pressurizing mechanism 21 fixedly connected with the screw rod sliding table 13 is pressed down or lifted up, wherein when the spring 213 is compressed, the elastic force is increased, and finally the downward pressure of the friction test block 62 on the friction ring block 61 is increased, and when the spring is lifted up, the downward pressure is reduced; the spring 213 in the above embodiment can be replaced by other elastic devices to achieve the same effect; the ring motor 43 and the lead screw motor 16 are controlled by a computer, and the actions of forward rotation, reverse rotation, acceleration, deceleration, sudden stop and the like of the ring motor 43 are controlled to simulate the situations of reversing, speed changing, sudden stop and the like in reality; the screw rod sliding table 13 is driven to move downwards, quickly press downwards and lift up by controlling the screw rod motor 16, and the conditions of load change, impact and the like in reality are simulated.
(3) Data sensing:
in the friction process of the friction ring block 61 and the friction test block 62, the temperature of the friction area is sensed through a temperature sensor 265, namely the friction heating condition; in the friction process, according to the difference of the rotation directions of the friction ring blocks 61, the friction test block 62 is subjected to a friction force in the left or right direction, so that the swing mechanism 23 swings in the left or right direction, and further the left or right side impact pin 252 impacts the friction force top block 326, and after the friction force top block 326 is pressed, the friction force sensor 325 senses a corresponding pressure, namely the friction force condition; the magnitude of the downward pressure applied by the pressure loading assembly 2 is sensed by the load sensor 24, so as to obtain load data and impact force data.
(4) The tested material is quickly replaced:
in the friction testing machine, the friction detection component 3 and the pressure loading component 2 are fixedly connected through the Z-shaped upper detection connecting rod 311, so the position relationship of each component in the friction detection component 3 and the pressure loading component 2 is relatively fixed; after the position relation of each part in the machine is set according to the requirement in the step (1) for the first time, when the friction ring block 61 or the friction test block 62 is replaced to carry out other friction tests, only the friction detection assembly 3 and the pressure loading assembly 2 are lifted together, and after the friction ring block 61 or the friction test block 62 is replaced, the friction detection assembly 3 and the pressure loading assembly 2 are lowered together, so that the positions of each part do not need to be adjusted one by one again in the process, and the repeated use efficiency of the friction test machine is high.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. The present invention is not limited to the above-described embodiments, and any obvious improvement, replacement or modification by those skilled in the art can be made without departing from the spirit of the present invention.
Claims (10)
1. The utility model provides a multiplex condition ring piece friction test machine which characterized in that: the device comprises a screw rod sliding table assembly (1), a pressure loading assembly (2), a friction detection assembly (3) and a ring block loading assembly (4);
the ring block loading assembly (4) comprises a ring block mounting seat (41) and a ring block motor (43), and the ring block mounting seat (41) is connected with the ring block motor (43);
the pressure loading assembly (2) comprises a pressurizing mechanism (21), a swinging mechanism (23) and a friction mechanism (26); the friction mechanism (26) is positioned above the ring block mounting seat (41), a test block clamp (266) is arranged at the lower end of the friction mechanism (26), and the front side and the rear side of the friction mechanism (26) along the friction direction are fixedly connected with the knocking nails (252); the pressurizing mechanism (21) comprises an upper plate and a lower plate which are connected through an elastic device in the vertical direction; the swing mechanism (23) comprises an upper swing arm and a lower swing arm, and the two swing arms can swing back and forth along the friction direction; the pressurizing mechanism (21) and the swinging mechanism (23) are connected in series at the upper end of the friction mechanism (26);
the screw rod sliding table assembly (1) comprises a screw rod sliding table (13) capable of moving up and down, and the screw rod sliding table (13) is connected with an upper plate of the pressurizing mechanism (21);
the friction detection assembly (3) is provided with a pair of friction force sensors (325) which are symmetrical front and back along the friction direction, the two friction force sensors (325) are respectively positioned on the front side and the back side of the friction mechanism (26) along the friction direction, and the two friction force sensors (325) can be respectively in contact fit with the impacting nails (252) on the two sides.
2. The multi-operating-condition ring block friction tester according to claim 1, characterized in that: the screw rod sliding table assembly (1) is fixed on the base (51) through a vertical seat (53), and the screw rod sliding table assembly (1) is fixed on one side of the vertical seat (53); the ring block mounting seat (41) and the same side of the screw rod sliding table assembly (1) are fixed to the bottom of the vertical seat (53) through a ring block bearing (42), and the ring block motor (43) is fixed to the bottom of the other side of the vertical seat (53).
3. The multi-operating-condition ring block friction tester according to claim 1, characterized in that: the lead screw slip table subassembly (1) still includes lead screw (14) and lead screw motor (16), and lead screw (14) vertical setting, lead screw (14) and lead screw slip table (13) cooperation are connected, and lead screw (14) upper end is connected with lead screw motor (16).
4. The multi-operating-condition ring block friction tester according to claim 1, characterized in that: a micro-displacement mechanism (22) is connected between the pressurizing mechanism (21) and the swinging mechanism (23) in series, and an upper panel and a lower panel of the micro-displacement mechanism (22) can move along the friction direction.
5. The multi-operating-condition ring block friction tester according to claim 4, characterized in that: and a load sensor (24) is connected in series between the swinging mechanism (23) and the friction mechanism (26).
6. The multi-operating-condition ring block friction tester according to claim 1, characterized in that: the collision nails (252) are fixed on two sides of the friction mechanism (26) through collision nail supports (251), and the collision nail supports (251) are of inverted U-shaped structures.
7. The multi-operating-condition ring block friction tester according to claim 1, characterized in that: the friction mechanism (26) comprises a friction upper support (261) and a friction lower support (263), the friction upper support (261) is connected with the friction lower support (263) through a dovetail tenon structure, the sliding direction of the dovetail tenon structure is perpendicular to the friction direction, and a dovetail locking nut (267) is arranged on the dovetail tenon structure; the test block clamp (266) is fixed at the lower end of the friction lower support (263).
8. The multi-operating-condition ring block friction tester according to claim 7, characterized in that: one side of the friction lower support (263), which is far away from the vertical seat (53), is connected with a temperature sensor (265) through a temperature support (264), and a probe of the temperature sensor (265) points to a friction area.
9. The multi-operating-condition ring block friction tester according to claim 1, characterized in that: the friction detection assembly (3) is of a front-back symmetrical structure along the friction direction and is fixed on the base (51) through two symmetrical sliding seats (52); the friction detection assembly (3) comprises a lower detection sliding table (32), and the lower detection sliding table (32) is connected to a sliding rail (521) of the sliding base (52) in a sliding manner; the sliding structure along the friction direction is arranged on the lower detection sliding table (32), the sliding structure is provided with a locking structure, and the friction force sensor (325) is connected to the lower detection sliding table (32) in a sliding mode through the sliding structure.
10. The multi-operating-condition ring block friction tester according to claim 9, characterized in that: the friction detection assembly (3) further comprises an upper detection sliding table (31), and the upper detection sliding table (31) is connected to the sliding rail (521) in a sliding manner; the upper detection sliding table (31) is positioned above the lower detection sliding table (32), and the upper detection sliding table and the lower detection sliding table are connected through a connecting plate (33); the connecting plate (33) is provided with a connecting plate sliding groove (331) and a connecting plate locking nut (332) which are used for adjusting and locking the distance between the lower detection sliding table (32) and the upper detection sliding table (31); the upper end of the upper detection sliding table (31) is connected with the lower plate of the pressurizing mechanism (21) through an upper detection connecting rod (311).
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| CN202011436713.4A CN112730127B (en) | 2020-12-11 | 2020-12-11 | Multi-working-condition ring block friction testing machine |
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| KR20110095664A (en) * | 2010-02-19 | 2011-08-25 | 자동차부품연구원 | Test device for friction characteristic between piston-ring and liner |
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