SU1341280A1 - Warp tension control device - Google Patents

Abstract

The invention relates to means for adjusting the base on textile machines. The purpose of the invention is to simplify the design. The device contains a speed sensor for the warp roller 1, made in the form of a flat disk 2, kinematically connected through centrifugal elements with a spring-loaded hollow cone 4, ending with a hollow cylinder 7. On the surface of the hollow cylinder 7 is placed a winding of the rheostat 8. The current collector 9 is rigidly fixed on the frame of the machine and the rheostat 8 is connected in series to the winding circuit 11 of the inductor 10. In the process of winding the warp threads, the winding radius of the warping roller 1 decreases, and the frequency of its rotation increases, simultaneously The centrifugal force Hz is magnified. At the same time, centrifugal elements act in the radial direction of the flat disk 2 and displace the rheostat 8, reducing the current in the winding 11 of the inductor 10. The rotation frequency of the warping roller 1 changes, while the tension of the unwound threads is kept constant. 2 Il. | C /) lo

Description

1P

The invention relates to means for re 1 to relieve the tension of a base on textile machines.

The purpose of the invention is to simplify the structure.

Figure 1 shows the structural diagram of the proposed device; figure 2 - view And figure 1.

The device consists of a rotational speed sensor for the warp roll 1, including a flat disk 2 rigidly mounted on the shaft 3 of the warp roll 1, a hollow cone 4 placed coaxially with the flat disk 2 and spring-loaded to it by means of a spring 5, and centrifugal elements made in the form of balls 6, located between the flat disk 2 and the hollow cone 4 and the frequency converter of rotation of the warping roller 1, made in the form of a hollow cylinder 7 rigidly connected with the flat disk 2 and mounted coaxially with it; placed the winding of the rheostat 8 and the current collector 9 which is rigidly fixed to the housing. The braking device of the warp roller 1 consists of two inductors 10 rigidly mounted on the casing and placed symmetrically outside the hollow cylinder 7, and the winding of the rheostat 8 is connected to the power source through parallel connected windings 11 of the inductors. The warp roller 1 is mounted on the supports 12.

The device works as follows

In the initial state, when the winding diameter on the warp roll 1 is large, the latter rotates at a minimum frequency, and as the winding diameter on the warp roll 1 decreases, its rotation frequency and,

, (4-) - P

,,, PR with „+ (R - R J Hj, r th PR (Xg S

de W is the number of turns of the re-gg stat winding depending on the current radius of the warping roller;

and - the voltage of the inductor coil; 1, 5

A is a constant coefficient;

g is the resistance of the root chain;

F - wire section;

02

responsibly, the rotational speed of the flat disk 2 gradually increases. In this case, the balls 6 due to the centrifugal force PLI move in the radial direction. In this case, the hollow cone 4 and the hollow cylinder 7 with the rheostat 8 move progressively and compress the spring-in 5. At the beginning of work

the current collector 9 is at the right end of the surface of the rheostat 8 and occupies a position in which the current in the winding 11 of the inductor 10 and the corresponding braking torque are maximum.

In the process of winding the warp threads, the winding radius of the warping roller

1 decreases, and the frequency of its rotation increases, therefore

centrifuge increases. power rts. In this case, the balls 6 move in the radial direction of the flat disk.

2 and the hollow cone 4, the hollow cylinder 7 and the rheostat 8 are shifted to the right, so

how the latter constitute a single rigid system. The rheostat 8, moving linearly to the right, allows the current collector 9 to capture a significant number of turns of the rheostat 8 and, therefore, reduces the current in the winding 11 of the inductor 10. At the same time, the frequency of rotation of the flat disk changes, and, consequently, the frequency of rotation shaft 3 of the warp shaft 1 - release occurs. The amount of active resistance introduced into the winding circuit 11 of the inductor 10 varies according to a curvilinear law (depending on the winding diameter of the warping roller 1) due to the uneven number of turns of the rheostat winding 8, which is determined by the formula

- active resistance

inductor coil circuit;

- tension of the warp threads, unwinding from the pelt, which must be kept constant from the beginning of the unwinding to the end;

- the current radius of the warping roller;

313

- slip core relative to the inductor;

- inductive resistance

cor; - resistivity

wire;

- radius of the resistor rheostat coil (radius of the hollow cylinder) (Gr (- const);

- Carried empty warp roller;

- radius of the warp shaft;

- the amount of seating flange warp roller;

- winding density on warp roll;

- coefficient of friction in disputes of the warp roller;

- radius of the warp pin.

Consequently, the braking torque of the warping roller 1 will also change. In this case, the tension force of the warp threads is kept constant due to a disproportionate change in the braking torque M relative to the radius of the warping roller R, i.e.

P const

Therefore, warp threads unwinding from warp roll 3 will have

1280

constant tension hank.

in the process of times

Claims (1)

Invention Formula A device for adjusting the tension of the base, predominantly on a sizing machine, comprising a speed sensor for the warping roller, including a flat disk rigidly mounted on the warp roller, a hollow cone, placed with and centered around the disk, and centrifugal elements located between the disk and cone, as well as frequency converter and deceleration means In order to simplify the design, the frequency converter of rotation of the warping roller is made in the form of a hollow cylinder rigidly connected to the disk and mounted coaxially with it, on the surface of which a rheostat winding is placed and the current collector is rigidly fixed on the body, and the means of braking the warp roller consists from two inductors rigidly mounted on the casing, placed symmetrically hollow cylinder, and attached to the disc core, while the rheostat winding through parallel connected windings of the inductor connected to a power source. Vida Editor A.Lezhnina Compiled by B. Bykovsky Tehred M.DndykKorrektor S.Shekmar Order 4408/34 Circulation 413 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, Projecto st., 4 FIG. 2