CN2766236Y - Device for measuring coefficient of sliding friction and moment of inertia - Google Patents
Device for measuring coefficient of sliding friction and moment of inertia Download PDFInfo
- Publication number
- CN2766236Y CN2766236Y CN 200420013209 CN200420013209U CN2766236Y CN 2766236 Y CN2766236 Y CN 2766236Y CN 200420013209 CN200420013209 CN 200420013209 CN 200420013209 U CN200420013209 U CN 200420013209U CN 2766236 Y CN2766236 Y CN 2766236Y
- Authority
- CN
- China
- Prior art keywords
- relay
- magnet
- baffle plate
- moment
- inertia
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The utility model discloses a device for measuring the coefficient of sliding friction and the moment of inertia. The utility model is composed of a working platform, a baffle plate, a supporting rack, a pulley wheel, a magnet and a control circuit, wherein the control circuit is composed of a stroke switch, a first relay, a second relay, a press-button switch, a magnet coil, a direct current power supply, a first resistor, a second resistor and a timer, wherein the baffle plate is arranged at the bottom end of an inclined platform surface of the working platform; the supporting rack is arranged at the other end of the working platform; the stroke switch is arranged at the side wall of the baffle plate; after connected in series with the timer, the second resistor is connected in parallel with the first resistor, and after connected in series with a normally-closed contact of the first relay and the magnet coil, the parallel branch circuit is connected in parallel with the stroke switch; the power supply is orderly connected in series with the second relay and a normally open contact of the second relay, and the press-button switch is connected in parallel with both ends of the normally open contact. The utility model has the advantages of simple structure, simple operation, safety, practicality, low cost, good sensitivity and high precision. The utility model is suitable for the measurement of the coefficient of sliding friction and the moment of inertia in a project or an experiment.
Description
Technical field
The utility model relates to a kind of measurement mechanism, relates in particular to the measurement mechanism of a kind of coefficient of sliding friction and moment of inertia.
Background technology
Human development all is the progress of production technology each time, the mankind enter into new century, build each time and nearly all be accompanied by high-tech innovation, the epoch of especially current this industrial dominate, high-tech, high standard, high benefit more and more becomes the basis of engineering design each time, kinematics is as an ancient and modern subject, be penetrated into each corner of life, and friction is necessity investigation key element in the motion study, it is the parameter of can not ignore in each motion, make a general survey of the Aero-Space in the world, navigation, military, fields such as construction work, the loss that tired friction causes and the value of creation are beyond measure.
Summary of the invention
The purpose of this utility model is: overcome the above-mentioned defective of prior art, a kind of accurate, easy to operate and safe, the highly sensitive coefficient of sliding friction and measurement mechanism of moment of inertia measured is provided.
The utility model is realized by following scheme: be made up of workbench, baffle plate, bracing frame, pulley, magnet and control circuit.Control circuit is made up of travel switch, first, second relay, pushbutton switch, magnet coil, direct supply, first, second resistance, timer.Baffle plate is arranged at the bottom of workbench inclined table, bracing frame is arranged at the workbench other end, travel switch is arranged at baffle sidewall, and the table top of workbench is protruded and runs through on the magnet top, and the moving contact of timer is arranged at magnet bottom and corresponding with the magnet coil position.First resistance in parallel behind second resistance serial connection timer, this parallel branch is connected in series travel switch in parallel again behind the normally closed contact, magnet coil of first relay, power supply is connected in series the normally opened contact of second relay, second relay successively, and pushbutton switch is connected to the normally opened contact two ends.
Bracing frame described in the utility model is an expansion link, so that regulate the height of workbench one end.
The utility model is simple in structure, simple to operate, safe and practical, cost is low, sensitivity is good, accuracy is high, and the applied range phase is applicable to the measurement of the coefficient of sliding friction and moment of inertia in engineering or the experiment.
Description of drawings
Fig. 1 is the utility model example structure synoptic diagram;
Fig. 2 is the utility model control circuit circuit diagram.
Embodiment
The utility model is made up of workbench 1, baffle plate 2, flexible rod-type bracing frame 3, pulley 4, magnet 5 and control circuit.Control circuit is made up of travel switch SQ, relay K 1, K2, pushbutton switch SB, magnet coil L, direct supply E, resistance R 1, R2, timer T.Baffle plate 2 is arranged at the bottom of workbench 1 inclined table, bracing frame 3 is arranged at workbench 1 other end, travel switch SQ is arranged at baffle plate 2 sidewalls, the table top of workbench 1 is protruded and runs through on magnet 5 tops, and the moving contact 6 of timer T is arranged at magnet 5 bottoms and corresponding with magnet coil L position.Parallel resistance R1 behind the resistance R 2 serial connection timer T, travel switch SQ in parallel again behind normally closed contact KM1, the magnet coil L of this parallel branch serial connection relay K 1, power supply E is connected in series the normally opened contact KM2 of relay K 2, relay K 2 successively, and pushbutton switch SB is connected to normally opened contact KM2 two ends.
Concrete measuring process is: 1, be put in object under test on the table top of workbench 1 inclination by pulley 4, starting point is positioned at the moving contact place of magnet, press the button switch S B, the normally open contact KM2 closure of power connection relay K 2, magnet coil L energising, with its moving contact absorption, object begins to glide, and timer picks up counting simultaneously; 2, meet the travel switch SQ that is installed on the baffle plate after object slides to certain distance, relay K 1 must be electric at this moment, and its normally closed switch KM1 disconnects, and timing finishes; Angle by displacement, time, adjustment workbench 1 table top of measuring tilts again according to known parameters, just can calculate the coefficient of sliding friction of this object in sliding motion by formula.
Claims (2)
1, the measurement mechanism of a kind of coefficient of sliding friction and moment of inertia is characterized in that: be made up of workbench (1), baffle plate (2), bracing frame (3), pulley (4), magnet (5) and control circuit; Control circuit is made up of travel switch (SQ), relay (K1, K2), pushbutton switch (SB), magnet coil (L), direct supply (E), resistance (R1, R2), timer (T); Baffle plate (2) is arranged at the bottom of workbench (1) inclined table, bracing frame (3) is arranged at workbench (1) other end, travel switch (SQ) is arranged at baffle plate (2) sidewall, the table top of workbench (1) is protruded and runs through on magnet (5) top, the moving contact (6) of timer (T) is arranged at magnet (5) bottom and corresponding with magnet coil (L) position, resistance (R2) serial connection timer (T) back parallel resistance (R1), the normally closed contact (KM1) of this parallel branch serial connection relay (K1), travel switch in parallel again (SQ) behind the magnet coil (L), power supply (E) is connected in series relay (K2) successively, the normally opened contact (KM2) of relay (K2), pushbutton switch (SB) are connected to normally opened contact (KM2) two ends.
2, the measurement mechanism of the coefficient of sliding friction according to claim 1 and moment of inertia is characterized in that: bracing frame 3 is an expansion link.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420013209 CN2766236Y (en) | 2004-12-31 | 2004-12-31 | Device for measuring coefficient of sliding friction and moment of inertia |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420013209 CN2766236Y (en) | 2004-12-31 | 2004-12-31 | Device for measuring coefficient of sliding friction and moment of inertia |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2766236Y true CN2766236Y (en) | 2006-03-22 |
Family
ID=36606898
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420013209 Expired - Fee Related CN2766236Y (en) | 2004-12-31 | 2004-12-31 | Device for measuring coefficient of sliding friction and moment of inertia |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2766236Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101876626A (en) * | 2010-04-06 | 2010-11-03 | 山东安能输送带橡胶有限公司 | Method for detecting rolling resistance coefficient of conveyer belt |
| CN101650295B (en) * | 2008-09-12 | 2011-09-14 | 张硕 | Device and method for measuring maximum static friction coefficient of artificial fish reef |
| CN105510222A (en) * | 2014-09-27 | 2016-04-20 | 中国石油化工集团公司 | Dynamic friction coefficient measuring device of drilling fluid mud cake and method thereof |
-
2004
- 2004-12-31 CN CN 200420013209 patent/CN2766236Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101650295B (en) * | 2008-09-12 | 2011-09-14 | 张硕 | Device and method for measuring maximum static friction coefficient of artificial fish reef |
| CN101876626A (en) * | 2010-04-06 | 2010-11-03 | 山东安能输送带橡胶有限公司 | Method for detecting rolling resistance coefficient of conveyer belt |
| CN105510222A (en) * | 2014-09-27 | 2016-04-20 | 中国石油化工集团公司 | Dynamic friction coefficient measuring device of drilling fluid mud cake and method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |