CN202939111U

CN202939111U - Device for measuring liquid viscosity coefficient

Info

Publication number: CN202939111U
Application number: CN 201220676986
Authority: CN
Inventors: 宋宏伟; 王启银; 赵飞
Original assignee: State Grid Corp of China SGCC; Datong Power Supply Co of State Grid Shanxi Electric Power Co Ltd
Current assignee: State Grid Corp of China SGCC; Datong Power Supply Co of State Grid Shanxi Electric Power Co Ltd
Priority date: 2012-12-10
Filing date: 2012-12-10
Publication date: 2013-05-15
Anticipated expiration: 2022-12-10

Abstract

The utility model relates to a device for measuring liquid viscosity coefficient; the device comprises a base steel plate (1), a bracket (2), a suspended filament (3), an outer cylinder (8), an inner cylinder (9), an acceleration sensor (10), a gear set (11), a temperature sensor (12), a tilt angle sensor (13), a lead (14), an indicator lamp (15), a liquid crystal screen (16), a reset switch (17) and a starting switch (18); the device is characterized in that the bracket (2) is welded at the base steel plate (1); the upper end of the suspended filament (3) is welded at an upper rod part of the bracket (2) and the lower end is fixed at the center of a horizontal gear of the gear set (11); and the lower end of the horizontal gear is fixed at the upper end face of the inner cylinder (9) by a support column. With the adoption of the device provided by the utility model, the offset angle after the inner cylinder is stable can be measured out conveniently and accurately, thus the experiment operation convenience and the experiment measurement result accuracy are greatly improved on the whole.

Description

Measure the device of liquid coefficient of viscosity

Technical field

The utility model relates to a kind of test unit, relates in particular to a kind of device of measuring the liquid coefficient of viscosity.

Background technology

In Experiment of College Physics, it is the most basic experiment that rotating-cylinder method is measured the liquid coefficient of viscosity.But exist the some shortcomings part in experimental provision in the past: the first, temperature survey and time measurement adopt traditional thermometer and hourmeter instrument to measure, operation inconvenience, error is larger.The second, inner core reaches the judgement of steady state (SS).Substantially all be the people for estimating, error is larger, even some device adds that the photoelectricity door is improved, or must measure and work as the light object whether equal people again for repeatedly adjusting, operates very loaded down with trivial details by two photoelectricity door times.The 3rd, the urceolus driving problems.Some device falls to driving urceolus upper end coiling steamboat by counterweight and goes to drive the urceolus rotation, but is difficult to guarantee that their lines all at sustained height, attract the interference of external force.Some adopts synchronous motor to drive urceolus and rotates, invariablenes turning speed, but the rotating speed of the needs when inner core is in steady state (SS) is not necessarily equal with motor speed, can't adjust.The 4th, the measurement of viscid moment.The device that counterweight drives be generally in measurement time t uniform descent apart from s, due to very complicated, very inconvenient in judgement operation at the uniform velocity, and each component height is difficult to guarantee consistent, error is also larger.Some adopts level crossing to survey rotational angle, is similar to the optical lever amplifying method, adds the devices such as rule and telescope due to need, and it is very inconvenient to debug, and adds eye-observation custom difference and such environmental effects etc., also can be with certain error.

The utility model content

The purpose of the present utility model has designed a kind of device of measuring the liquid coefficient of viscosity for the deficiency of background technology.

The technical solution of the utility model provides a kind of device of measuring the liquid coefficient of viscosity, comprise base steel plate, support, suspension filament, urceolus, inner core, acceleration transducer, gear set, temperature sensor, obliquity sensor, wire, pilot lamp, liquid crystal display, reset switch, starting switch is characterized in that:

Support welding is in the base steel plate, hangs the filament upper end and is welded in support upper boom place, and the horizontal gear central authorities of gear set are fixed in the lower end, and the inner core upper surface is fixed in by pillar in the horizontal gear lower end;

The fixed support upper end of vertical gear is welded in support upper boom place, and the lower end is connected with vertical gear; The support steel plate of drive link, the lower end is welded in the base steel plate, and the upper end is provided with the diameter circular hole identical with the drive link diameter, and drive link one end is fixed on vertical gear, and the other end passes through the circular hole frame on the support steel plate of drive link;

The support of motor lower end is welded on the base steel plate, and the upper end is used for fixedly stepper motor, and the urceolus bottom is fixed in the stepper motor upper end; Temperature sensor is fixed in outer tube inner wall, and acceleration transducer is fixed in the inner core upper surface, and the obliquity sensor level is fixed on drive link;

Stepper motor, temperature sensor, acceleration transducer, obliquity sensor are connected in main frame by wire.

Further, pilot lamp, liquid crystal display, reset button, starting switch all is connected on the circuit board of main frame inside, and host housing is responsible for encapsulation.

The beneficial effects of the utility model: the design of adopting main frame, temperature sensor, acceleration transducer, obliquity sensor, dc stepper motor to combine, the temperature and time collection is controlled more quick accurate, stepper motor can drive urceolus and rotate, speed is adjustable, the application of acceleration transducer can judge accurately whether inner core is at the uniform velocity state, obliquity sensor can be measured the angle of the stable rear skew of inner core easily and accurately, thereby significantly promotes on the whole convenient experimental operation and experimental measurements accuracy.

Description of drawings

Fig. 1 is the schematic diagram of the device of measurement liquid coefficient of viscosity;

Wherein: 1-base steel plate, the 2-support, 3-hangs filament, the fixed support of 4-vertical teeth wheels, the support steel plate of 5-drive link, 6-support of motor, 7-stepper motor, 8-urceolus, the 9-inner core, the 10-acceleration transducer is fixed on urceolus, the 11-gear set, consisted of 12-temperature sensor, 13-obliquity sensor, 14-wire by horizontal teeth wheels and vertical teeth wheels, the 15-pilot lamp, 16-liquid crystal display, 17-reset button, 18-starting switch, 19-are host housings, and 20-is drive link.

Embodiment

As shown in Figure 1, the device of measurement liquid coefficient of viscosity described in the utility model, comprise base steel plate 1, support 2, hang filament 3, urceolus 8, inner core 9, acceleration transducer 10, gear set 11, temperature sensor 12, obliquity sensor 13, wire 14, pilot lamp 15, liquid crystal display 16, reset switch 17, starting switch 18.

Support 2 is welded on base steel plate 1, is responsible for fixedly associated components; Hang filament 3, the upper end is welded in support 2 upper boom places, and the horizontal gear central authorities of gear set 11 are fixed in the lower end, and inner core 9 upper surfaces are fixed in by pillar in the horizontal gear lower end; Fixed support 4 upper ends of vertical gear are welded in support 2 upper boom places, and the lower end is connected with vertical gear by three holes; The support steel plate 5 of drive link, the lower end is welded on base steel plate 1, there is the diameter circular hole identical with the drive link diameter upper end, drive link 20 1 ends are fixed on vertical gear, the other end passes through the circular hole frame on the support steel plate 5 of drive link, support of motor 6 lower ends are welded on base steel plate 1, and the upper end is used for fixedly stepper motor 7, and stepper motor 7 upper ends are fixed on urceolus 8 bottoms; Temperature sensor 12 is fixed on urceolus 8 inwalls, and acceleration transducer 10 is fixed in the inner core upper surface, and obliquity sensor 13 levels are fixed on drive link 20; Stepper motor 7, temperature sensor 12, acceleration transducer 10, obliquity sensor 13 are connected on main frame by wire; Pilot lamp 15, liquid crystal display 16, reset button 17, starting switch 18 all is connected on the circuit board of main frame inside, and host housing 19 is responsible for encapsulation.

A kind of principle of device of measuring the liquid coefficient of viscosity that the utility model provides is:

Gear set 11 is the precision gear group, and gear set 11 is fixed on inner core 9 by screw, and is suspended on support 2 by the suspension filament 3 of the known coefficient of torsion.Press host-initiated switch 18, temperature sensor 12 transfers back to the temperature T 1 of main frame liquid this moment, and is shown on liquid crystal display 16.Stepper motor drives urceolus 8 with a low speed and rotates, and due to the effect of the viscid moment of liquid, inner core 9 also rotates suspension thereupon.Acceleration transducer 10 also begins to start simultaneously, measures the acceleration of inner core 9.Be not equal to 0 when the acceleration that acceleration transducer 10 passes back being detected, main frame can suitably improve the frequency (the corresponding corresponding rotating speed of different frequency) of the control signal of stepper motor automatically, increases the urceolus velocity of rotation, has namely increased the viscid moment of liquid to inner core.Along with moment increases, inner core 9 can driven gear groups 11 rotate, and drives obliquity sensor by drive link and deflect.When the countermoment that hangs filament 3 equaled viscid moment, inner core stopped operating, and obliquity sensor can not deflect yet again, and this moment, inner core 9 acceleration were 0.When inner core 9 acceleration being detected and equal 0, the host computer control motor no longer increases speed, and by program at this moment rotating speed change into cycle T ₀Be shown on liquid crystal display 16, start simultaneously obliquity sensor 13 and temperature sensor 12, deflection angle θ, and the temperature T 2 of this moment passes main frame back, and angle θ and T2 is shown on liquid crystal display.Can show T on final liquid crystal display ₀, θ, average temperature value ((T1+T2)/2).

Last substitution formula

Calculating coefficient of viscosity η gets final product.A wherein, b are the radius of inside and outside cylinder; L is the height of inner core; D is for hanging the filament coefficient of torsion.

Claims

1. device of measuring the liquid coefficient of viscosity, comprise base steel plate (1), support (2), hang filament (3), urceolus (8), inner core (9), acceleration transducer (10), gear set (11), temperature sensor (12), obliquity sensor (13), wire (14), pilot lamp (15), liquid crystal display (16), reset switch (17), starting switch (18) is characterized in that:

Support (2) is welded in base steel plate (1), hangs filament (3) upper end and is welded in support (2) upper boom place, and the horizontal gear central authorities of gear set (11) are fixed in the lower end, and inner core (9) upper surface is fixed in by pillar in the horizontal gear lower end;

Fixed support (4) upper end of vertical gear is welded in support (2) upper boom place, and the lower end is connected with vertical gear; The support steel plate (5) of drive link, the lower end is welded in base steel plate (1), the upper end is provided with diameter and the identical circular hole of drive link (20) diameter, and drive link (20) one ends are fixed on vertical gear, and the other end passes through the circular hole frame on the support steel plate (5) of drive link;

Support of motor (6) lower end is welded on base steel plate (1), and the upper end is used for fixedly stepper motor (7), and urceolus (8) bottom is fixed in stepper motor (7) upper end; Temperature sensor (12) is fixed in urceolus (8) inwall, and acceleration transducer (10) is fixed in the inner core upper surface, and obliquity sensor (13) level is fixed on drive link (20);

Stepper motor (7), temperature sensor (12), acceleration transducer (10), obliquity sensor (13) are connected in main frame by wire.

2. the device of measurement liquid coefficient of viscosity according to claim 1, it is characterized in that: pilot lamp (15), liquid crystal display (16), reset button (17), starting switch (18) all is connected on the circuit board of main frame inside, and host housing (19) is responsible for encapsulation.