Bench to test cellular surfaces

FIELD: process engineering.

SUBSTANCE: invention relates to test equipment, particularly, to devices for testing cellular surfaces for quality of grain mix separation. Proposed test bench comprises drive, frame, cellular surface, loading bin and trough composed of open cylinder sliding axially along support rollers and vertically and horizontally relative to cellular surface in vertical plane. Wall with segmental baffles secured thereto perpendicular to trough axis and fitted on shaft with pivot lever inside said trough.

EFFECT: higher accuracy of measurement.

4 dwg

 

The invention relates to test equipment, namely, devices for testing cellular surfaces on the quality of the separation of grain mixtures.

A device for testing cellular surfaces, comprising a frame, mesh surface, the drive, the boot tray and chute with discharge auger (Gromov A.G., burdeiny B.C. Research clocaenog Trier. - Mechanization and electrification of socialist agriculture, No. 11, 1973, p.10 12...).

The proposed device does not provide an accurate measure of the allocation of particles in relation to performance and the source of the infestation, as the intensity of flow of the mixture of particles along the length of the mesh surface (in the direction of the axis of the discharge auger) is decreasing as the selection of particles from the mixture, and the distribution of the partial mixture and the mass ratio of the partial particles across the width of the honeycomb surface variables. The result excludes the possibility to obtain discrete (objective) value of the level of separation of particles in correlation with the actual performance values and test conditions, as the unloading auger makes the total mass of particles allocated to all sections of wire mesh surface, which are characterized by different test conditions.

A device comprising a frame, mesh surface, the drive, agrotechnic tray and chute (RF patent No. 2305609, WV 13/02, A01F 12/44, 29.12.2005,), is selected as a prototype.

A disadvantage of the known device is that when the test is independent estimates of the relationship between the efficiency of the allocation of particles with the kinematic regime and test conditions (feed, the ratio of the components of separable mixtures), as they (conditions) vary along the length of the wire mesh surface: osogna mesh cylinder impurity content increases; in puppet is reduced. While the actual flow as the selection of the components of the mixture decreases. The result is impossible to obtain accurate measurements of effective relationships indicators with the conditions of the test.

The purpose of the invention is the improved accuracy of the measurements.

This objective is achieved in that in the test bench for the cellular surfaces, comprising a frame, mesh surface, boot tray, trough according to the invention the groove is made in the form of an open cylinder with the possibility of axial movement on the supporting rollers, vertical and horizontal movement relative to the cellular surface in the vertical plane, inside the trench on the shaft with the rotary lever is placed wall attached to the segment partitions perpendicular to the trench axis.

Device for testing cellular surfaces is illustrated drawings the, which figure 1 shows a General view, figure 2 - cross section A-a in figure 1 with the wall in position I, figure 3 - cross section a-a in figure 1 with the wall in position II, figure 4 - a view B figure 1.

Test stand for porous surfaces contains porous surface 1, drive 2 and the support 3, the loading tray 4, the chute 5, the shaft 6 with the wall 7 and a radial partitions 8, the supporting rollers 9, the rotary lever 10, the platform 11 with the tabs 12 and the frame 13 by clamps 14, the guides 15.

Test stand for porous surfaces is as follows. Mesh surface 1 result in rotational movement of the drive rollers 2. Then inside mesh surface 1 on the boot tray serves 4 grain mixture. After the stabilization process of the distribution of the grain mixture along the length and width of the mesh surface 1 inside it from the opposite end of enter the chute 5, moving it in the axial direction of the supporting rollers 9. This wall 7 with the rotary lever 10 is in position I (figure 2). After stabilization of the process of separation of particles from the grain swivel lever 10 rotates the shaft 6 with the wall 7 in position II (Fig 3). This point is the beginning point of time of sampling during which the emitted particles are accumulated in separate volumes of the trench 5, limited by the wall 7, the trench 5 and a radial partitions 8. At the end of the straps sampling lever 10 rotates the shaft 6 with the wall 7 to the initial position I (figure 2). After that, the rotation of the mesh surface 1 stop, and the trench 5 is removed from it, moving it around the support rollers 9. Then the lever 10 with the wall 7 is switched to position II (Fig 3) and of each separate volume of the trench 5, located between the radial partitions 8 unload the selected particles in a separate measuring container and weighed. Further measurements of weight and time samples define the relationship:

QK=Qand(1-i=1Kmi/Qandtaboutp);(1)

CK=[mpp/(Mabout+mpp-i=1(K-1)mi)]100%,the (2)

where Qto- supply of grain (variable along the length of the indent surface)corresponding to the location of the K-th account inter-segment volume from the chute 4, kg/s;

Qand- the initial supply of grain through the loading tray 4;

mi- the weight of the portion of the selected particles in the i-th volume, kg;

topthe duration of sampling;

Cto- contamination of grain on the mesh plot of the surface under the K-th inter-segment displacement, %;

mCR- weight of the impurities in the original sample of grain, kg;

Mo- grain weight of the main culture in the original sample, kg;

to=1, 2, 3...;

i=1, 2, 3...

Formula (2) are valid for porous surfaces that extend from the grain in the chute 5 the grain of the main culture. For porous surfaces that extend from the grain in the chute 5 impurities, the distribution of impurity of(CK')along the length of the wire surface will be determined by the formula:

CK'={(mpp-i 1(K-1)mi)/[Mabout+(mpp-i=1(K-1)mi)]}100%.(3)

On the result of testing the values of Qto, Cto,CK'establish relationshipsCK=f1(QK)CK'=f2(QK)that reflect the objective conditions of technological process and are the basis for the determination of rational parameters and operation modes of the cellular surfaces.

When changing modes or compositions grain is of osmesa, as well as the determination of the ranges of angles of deposition of emitted particles from the mesh changes the position of the trench 5 on the cellular surface 1 vertically by guides 15 and retainers 12, horizontally by moving the platform 11 and the frame 13 with subsequent fixation of the retainer 14.

The ability to rotate the shaft 6 with the wall 7 into the groove 5 in two positions of the rotary lever 10 eliminates the error control portions emitted from the grain particles in the time periods: enter the chute 5 into the inner volume of the mesh surface 1; stabilizing selection process particles; output chute 5 from the inner volume of the honeycomb surface 1. This results in improving the accuracy of measurements.

Test stand for porous surfaces, comprising a frame, mesh surface, the drive, the boot tray and chute, wherein the chute is made in the form of an open cylinder with the possibility of axial movement on the supporting rollers, vertical and horizontal movement relative to the cellular surface in the vertical plane, inside the gutter placed on the shaft wall is attached to the segment partitions perpendicular to the trench axis.



 

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