CN201281685Y

CN201281685Y - Fluid rheology property and viscosity measuring instrument

Info

Publication number: CN201281685Y
Application number: CNU2008201521294U
Authority: CN
Inventors: 李俊峰; 周洪
Original assignee: SHANGHAI NIRUN INTELLIGENT TECHNOLOGY Co Ltd
Current assignee: SHANGHAI NIRUN INTELLIGENT TECHNOLOGY Co Ltd
Priority date: 2008-08-19
Filing date: 2008-08-19
Publication date: 2009-07-29
Anticipated expiration: 2018-08-19

Abstract

The utility model relates to a fluid rheological characteristic and viscosity measuring instrument comprising an installing plate, a center connecting mechanism positioned on the installing plate, a jewelled bearing mechanism and a rotor are positioned on the lower part of the installing board and the center connecting mechanism sequentially, the instrument also comprises a torque sensor, a torque shift control mechanism and a bearing mechanism that are positioned on the upper part of the installing board and the center connecting mechanism sequentially, the bearing mechanism is connected with a stepper motor that is driven by a high-subdivision stepper motor driving circuit, and a non-contact photoelectric sensor connected with the control system of a computer processor is positioned beside the torque sensor. The utility model has beneficial effects of simpler structure, noise-free, convenience in speed changing, good reliability, assurance of viscosity measurement accuracy, assurance of less anthropogenic factor effect on level condition of instruments because of the operations of non-contact type remote control apparatus and assurance of measurement accuracy.

Description

Fluid rheology characteristic and viscosity measuring instrument

Technical field

The utility model relates to a kind of measuring instrument, relates in particular to a kind of fluid rheology characteristic and viscosity measuring instrument.

Background technology

Fluid rheology characteristic and viscosity measuring instrument are a kind of surveying instruments of measuring various fluid rheology characteristics, comprise the rheological characteristics curve of non-Newtonian liquids such as the apparent viscosity of measuring Newtonian fluid, non-Newtonian fluid, pseudoplastic fluid, plastic fluid, dilatant fluid.

Fluid rheology characteristic and viscosity measurement are a kind of methods of research flow of material bulk properties behavior.It is a kind of direct obtainable fluid properties, and the R﹠D personnel can do the forecast assessment of product phenomenon and behavior according to these fluid properties, and draws rheological data and product behavior relation.

At present, the instrument of domestic measurement viscosity is existing multiple, with regard to its this body structure of instrument, and rotary viscosity measuring principle basically identical, comprise viscosity measurement gearing, torque detecting apparatus, data processing equipment, but existing rotational viscosimeter is still waiting on measurement precision, function perfect.

As seen from Figure 1: (among the figure: 1: synchronous motor 2: reduction gearing 3: index dial 4: spring 5: jewel bearing 6: coupling apparatus 7: protect frame 8: rotor 9: test solution cup 10: immerse sign 11: pointer 12: handle) synchronous motor is done the constant speed rotation together through speed gear deceleration drive index dial, spring, pointer, rotating shaft, rotating cylinder, the viscosity moment of test solution makes spring deflection, and rotor and pointer lag behind the certain angle of index dial and rotate with speed with it.The viscosity of test solution is big more, and it is big more that viscosity moment makes rotor, pointer lag behind the angle of index dial, can linearly convert and obtains the apparent viscosity value of test solution by reading deflection angle on the index dial.There are many weak points in this kind design proposal, first: adopt synchronous machine drives, this kind motor is by ac power supply, ac power frequency can influence the rotational speed of synchronous motor, synchronous motor as 50HZ, at ac power frequency is under the situation of 60HZ, and the trueness error of rotational speed is 16.67%, and the apparent viscosity accuracy value directly is directly proportional with the rotational speed trueness error.Second: synchronous motor is transformed into different final rotational speeies through different gear reductions.Mechanical gear gear train complexity, poor reliability, the long-time use, wearing and tearing easily, thus influence the viscosity measurement precision.The 3rd: synchronous motor is through the gear change rotational speed, gear drive can only be under several fixed rotating speeds the determination test parameter, can not stepless change, for the measurement of fluid rheology character, require more shear rate conversion, this kind structure is slightly inadequate.

Summary of the invention

The utility model technical issues that need to address have provided a kind of fluid rheology characteristic and viscosity measuring instrument, are intended to solve the above problems.

In order to solve the problems of the technologies described above, the utility model is achieved through the following technical solutions:

The utility model comprises: an installing plate; On described installing plate, settle a center bindiny mechanism; Below the installing plate, be jewel bearing mechanism and rotor successively in the bindiny mechanism of center; Also comprise: above the installing plate, be torque sensor, moment of torsion displacement adjusting mechanism and Bearning mechanism successively in the bindiny mechanism of center; Described Bearning mechanism connects a stepper motor that is driven by height segmentation stepper motor driving circuit; At contactless photoelectric sensor that joins with the computer processor control system of the other arrangement of the side of described torque sensor.

Compared with prior art, the beneficial effects of the utility model are: adopted high segmentation drive stepping motor as gear train, save gear drive, directly drive spring and rotor rotation by Bearning mechanism, center bindiny mechanism, structure is simpler, noiseless, convenient, the good reliability of speed change; Adopt DC power supply, the alternating voltage frequency change does not influence the rotating speed accuracy, has guaranteed to measure the accuracy of viscosity; Contactless mode Remote control apparatus operation guarantees that the least possible human factor that is subjected to of instrument horizontality influences, and guarantees measurement accuracy.

Description of drawings

Fig. 1 is fluid rheology characteristic and a viscosity measuring instrument structural representation in the prior art;

Fig. 2 is the utility model structural representation;

Embodiment

Below in conjunction with accompanying drawing and embodiment the utility model is described in further detail:

As seen from Figure 2: the utility model comprises: an installing plate 600; On described installing plate 600, settle a center bindiny mechanism 700; Below the installing plate 600, be jewel bearing mechanism 800 and rotor 900 successively in the center bindiny mechanism 700; Also comprise: above the installing plate 600, be torque sensor 500, moment of torsion displacement adjusting mechanism 400 and Bearning mechanism 200 successively in the center bindiny mechanism 700; Described Bearning mechanism 200 connects a stepper motor 100 that is driven by height segmentation stepper motor driving circuit 300; At contactless photoelectric sensor 140 that joins with computer processor control system 120 of the other arrangement of the side of described torque sensor 500;

The control of described high segmentation stepper motor driving circuit 300 is to control by a computer processor control system 120; The computer processor control system is controlled realization by telepilot;

Described computer processor control system 120 is joined with liquid crystal display 130 and communication interface 110; Communication interface 110 external mini-printer or PC.

The utility model centre bearer mechanism, center bindiny mechanism drive torque sensor, jewel bearing mechanism and rotor rotation, if rotor is not subjected to the resistance of fluid, torque sensor and moment of torsion displacement adjusting gear are at same position; Otherwise, if rotor is subjected to the viscosity resistance of fluid, torque sensor produces moment of torsion and viscosity resistance is contended with, reach balance at last, at this moment partly detect torque signal by contactless photoelectric sensor respectively and carry out data processing for 16 micro processor control system, at last on band night vision function LCD screen) demonstration fluid rheology characteristic related data.

High segmentation drive stepping motor is as main running part, and the cardinal principle structure is the same with existing viscosity tester theory structure, but the utility model contrasts existing structure, has saved mechanical gear, directly drives the central shaft rotation by stepper motor.

The moment of torsion test section: if rotor idle running, rotor is not subjected to the viscous force of any liquid, and the pointer position that structure and torque sensor are adjusted in the moment of torsion displacement is in same position at horizontal direction; If rotor is immersed in the liquid fully, the rotor rotation will be subjected to reciprocal liquid viscous force, torque sensor deflects, produce and the reciprocal equilibrant of liquid viscous force, after rotating several circles, liquid viscous force and equilibrant reach balance the most at last, it is constant that torque sensor and moment of torsion displacement adjusting mechanism form certain deflection angle, motor drives torque sensor with constant rotating speed and moment of torsion displacement adjusting gear rotates continuously by contactless photoelectric sensor, torque sensor becomes certain deflection angle with moment of torsion displacement adjusting mechanism, to be docile and obedient preface by contactless photoelectric sensor, the mistiming that both pass through can be detected by the microprocessor interrupt mode.By constant rotating speed, the time that deflection angle is passed through two known conditions can be calculated the size of deflection angle, and the size of deflection angle has just been represented the size of equilibrant, and linear, as long as simply deflection angle and equilibrant are done the apparent viscosity value that linear transformation just can converse liquid.

Contactless straighforward operation part: before the stepper motor rotation, there is a horizontal situation display instrument top, the measurement requirement instrument necessarily is in horizontality, measuring accuracy just can be guaranteed, if instrument is not in horizontality, rotor and other parts will be in eccentric state, and the rotor measurement liquid viscosity is except being subjected to the effect of liquid viscous force, also be subjected to the effect of eccentric moment, increased the error of eccentric moment.The improvement of the utility model on this problem except keeping original instrument panel mode of operation, also increased by a cover radio receiver on panel, be used to receive outside operational order.In a single day instrument is adjusted into level, and measuring operation is with complete contactless control.The user frequently touches viscosity meter, and the problem that causes the level of viscosity meter often to depart from improves.

Claims

1. fluid rheology characteristic and viscosity measuring instrument comprise: an installing plate; On described installing plate, settle a center bindiny mechanism; Below the installing plate, be jewel bearing mechanism and rotor successively in the bindiny mechanism of center; It is characterized in that also comprising: above the installing plate, be torque sensor, moment of torsion displacement adjusting mechanism and Bearning mechanism successively in the bindiny mechanism of center; Described Bearning mechanism connects a stepper motor that is driven by height segmentation stepper motor driving circuit; At contactless photoelectric sensor that joins with the computer processor control system of the other arrangement of the side of described torque sensor.

2. fluid rheology characteristic according to claim 1 and viscosity measuring instrument is characterized in that: the control of described high segmentation stepper motor driving circuit is to control by a computer processor control system; The computer processor control system is controlled realization by telepilot.

3. fluid rheology characteristic according to claim 1 and 2 and viscosity measuring instrument is characterized in that: described computer processor control system is joined with liquid crystal display and communication interface; External mini-printer of communication interface or PC.