CN200989889Y

CN200989889Y - Metal wire expansion coefficient investigating experimental device

Info

Publication number: CN200989889Y
Application number: CN 200620112095
Authority: CN
Inventors: 谭兴文
Original assignee: Southwest University
Current assignee: Southwest University
Priority date: 2006-12-29
Filing date: 2006-12-29
Publication date: 2007-12-12
Anticipated expiration: 2016-12-29

Abstract

The utility model relates to a metal linear expansion coefficient detecting tester which includes a host machine, a temperature controller, and an optical lever system. The host machine consists of a supporter, a heat insulating sleeve, a heat conductive pipe, a heater, a temperature sensor and a platform; the heat conductive pipe is externally provided with the heater; the heat conductive pipe and the heater are arranged in the heat insulating sleeve to form an integration which is fixed on the supporter; the heat conductive pipe is also provided with the temperature sensor; the heat conductive pipe is internally provided with a metal sample rod under test; a platform is supported on the supporter. The optical lever system consists of a frame, a streamer lamp, an optical lever and a spherical mirror; the rear tiptoe of the optical lever is arranged on the upper top end of the metal sample rod under test; the front tiptoe of the optical lever is arranged on the platform; the spherical mirror is fixed on the right upper part of the front tiptoe of the optical lever; the streamer lamp and a scale are arranged on the frame, facing to the spherical mirror. The utility model can precisely arrange and control the temperature of the metal sample under test, measures the linear expansion coefficient of various metal samples, and has the advantages of simple and dense structure, obvious physical phenomena, easy operation and low cost.

Description

A kind of linear expansion coefficient determination experiment device

Technical field

The utility model relates to a kind of Physical Experiment instrument, is specifically related to a kind of experiment instrument of measuring linear expansion coefficient.

Technical background

When the rising or the reduction of object temperature, the interior of articles molecular thermalmotion will aggravate or weaken, and makes the material molecule average headway become big or diminishes, and shows the characteristic of expanding with heat and contract with cold of object.Though thermal expansion is not very big, can produce very big stress.So, in processes such as engineering design, machine-building, materials processing, all must the expansion characteristics of material be taken into full account.What generally be concerned about most is that axial dimension is the variation of length, is the linear expansion coefficient of object usually.In Physical Experiment, generally adopt mechanical clock gauge or normal optical lever that tiny length is changed and measure.The shortcoming of preceding a kind of method is: bother very much when changing testing sample, and error is bigger; The shortcoming of a kind of method in back is that physical phenomenon is not directly perceived, and instrument is regulated pretty troublesome.

Summary of the invention

The purpose of this utility model provides a kind of linear expansion coefficient determination experiment device, can measure the linear expansion coefficient coefficient of the metal bar sample of various materials, for the research linear expansion coefficient provides experimental tool.

The technical solution of the utility model is as follows:

Linear expansion coefficient determination experiment device comprises main frame, temperature controller, the several parts compositions of optical lever system.

Described main frame is made up of bearing, collet, heat pipe, well heater, temperature sensor and platform, heat pipe is adorned well heater outward, be contained in jointly again and form an integral body in the collet, this overall fixed is on bearing, also be provided with temperature sensor on the heat pipe, adorn metal sample rod to be measured in the heat pipe, one platform is arranged in the bearing upper support.

Described optical lever system is made up of support, shot-light, optical lever and spherical mirror, the back tiptoe of optical lever is placed on the last top of metal sample rod to be measured, preceding tiptoe is placed on the platform, spherical mirror be fixed in optical lever preceding tiptoe directly over, shot-light and scale are rack-mount, relative with spherical mirror, its position should satisfy light that shot-light sends through spherical mirror reflection back at the zero graduation place of scale one-tenth " ten " word picture clearly.

Described temperature controller is connected with well heater, temperature sensor and shot-light by control line respectively.

The utility model has following advantage: can accurately set and control the temperature of metal sample to be measured, and the linear expansion coefficient of various metal samples is measured, simple in structure, compact, physical phenomenon is directly perceived, and is simple to operate, and cost is low.

Description of drawings

Fig. 1 is the structural representation of utility model.

Fig. 2 is the structural representation of the shot-light of utility model.

Embodiment

Below in conjunction with drawings and Examples the utility model is further described.

The structure of this device is referring to Fig. 1, and it includes main frame, temperature controller 1 and the several parts of optical lever system.

Main frame is made up of bearing 8, collet 9, heat pipe 10, well heater 4, temperature sensor 2, platform 11.Well heater 4 is contained in outside the heat pipe 10, and heat pipe 10 is provided with temperature sensor 2, and they are contained in jointly and form an integral body in the collet 9, and this overall fixed is used to adorn metal sample rod 3 to be measured in the heat pipe 10 on bearing 8.In addition, on bearing 8, play a platform 11 by a they sup-port, the height of this platform 11 should with the upper surface level of metal sample rod 3 to be measured.Below the bearing 8 set screw is arranged, in order to regulating the level of bracket base, upper surface of support has and shows the whether bubble of level of base.

Optical lever system is made up of support 14, shot-light 12, optical lever 6, spherical mirror 7, scale 13 that radius-of-curvature is very big.The back tiptoe of optical lever 6 is placed on the last top of metal sample rod 3 to be measured, preceding tiptoe is placed on the platform 11, spherical mirror 7 be fixed in optical lever 6 preceding tiptoe directly over, shot-light 12 and scale 13 are installed on the support 14, relative with spherical mirror 7, its position should satisfy light that shot-light sends through spherical mirror 7 reflection backs at the zero graduation place of scale 13 one-tenth " ten " word picture clearly.The structure of shot-light 12 is seen Fig. 2, and 2-1 is for being carved with the clear glass of " ten " word graticule, and 2-2 is the shot-light shell, and 2-3 is convex lens, and 2-4 is a bulb, and 2-5 is the focus adjustment screw.

Temperature controller 1 is connected with well heater 4, temperature sensor 2 and shot-light 12 by control line 5 respectively.

Referring to Fig. 1, during work, open the power supply preheating of temperature controller 1 earlier; Regulate the following adjusting screw of bearing 8, make bearing 8 base levels.Temperature controller 1 is connected with well heater 4, shot-light 12 and temperature sensor 2 by control line 5 respectively.The back tiptoe of optical lever 6 is placed on the last top of metal sample rod 3 to be measured, and preceding tiptoe is placed on the platform 11.Regulate the spherical mirror 7 on the optical lever 6, make the optical axis level of spherical mirror 7.Regulate shot-light 12 height and with the distance of optical lever 6, make light that shot-light sends through spherical mirror reflection back at the zero graduation place of scale 13 one-tenth " ten " word picture clearly.Write down the initial temperature of metal sample rod 3 to be measured.On temperature controller 1, preset the temperature of metal-like crystal bar 3 to be measured by increase progressively uniform temp at every turn, metal sample rod 3 to be measured is heated, behind the testing sample temperature stabilization that shows on the temperature controller 1, record temperature value and the reading of " ten " word picture on scale 13; With the distance that on scale 13, moves by 1 ℃ of " ten " word of the difference every rising of method accounting temperature picture; The length of measuring light lever 6 and shot-light 12 calculate the linear expansion coefficient of metal sample rod 3 to be measured to the distance of spherical mirror 7 with the principle of optical lever.

Claims

1, linear expansion coefficient determination experiment device is characterized in that: it comprises main frame, temperature controller and optical lever system;

Described main frame is made up of bearing (8), collet (9), heat pipe (10), well heater (4), temperature sensor (2) and platform (11), the outer dress of heat pipe (10) well heater (4), be contained in jointly again and form an integral body in the collet (9), this overall fixed is on bearing (8), also be provided with temperature sensor (2) on the heat pipe (10), adorn metal sample rod to be measured (3) in the heat pipe (10), one platform (11) is arranged in bearing (8) upper support;

Described optical lever system is made up of support (14), shot-light (12), optical lever (6) and spherical mirror (7), the back tiptoe of optical lever (6) is placed on the last top of metal sample rod to be measured (3), preceding tiptoe is placed on the platform (11), spherical mirror (7) be fixed in the preceding tiptoe of optical lever (6) directly over, shot-light (12) and scale (13) are installed on the support (14), relative with spherical mirror (7), its position should satisfy light that shot-light sends through spherical mirror (7) reflection back at the zero graduation place of scale (13) one-tenth " ten " word picture clearly;

Described temperature controller (1) is connected with well heater (4), temperature sensor (2) and shot-light (12) by control line (5) respectively.

2, linear expansion coefficient determination experiment device according to claim 1, it is characterized in that: bearing has set screw below (8), and the surface has and shows the whether bubble of level of base.