RU1798269C - Roller conveyer roller drive - Google Patents

Abstract

Usage: the invention relates to rolling production. SUMMARY OF THE INVENTION: the drive comprises rollers, a coupling device, a main motor connected to a reduction gear consisting of a worm and a worm wheel. The drive is equipped with an additional electric motor and a controlled clutch. One of the halves of the controlled clutch is connected to the roller table roller via an additional electric motor shaft and a coupling device, and the second half is connected to the reduction gear worm wheel. 1 ill.

Description

The invention relates to auxiliary equipment for rolling production, and in particular to roller table roller drives.

The aim of the invention is to expand the operational capabilities of the drive by providing a wide range of speed control for the rollers.

The invention is illustrated in the drawing.

The drive comprises rollers 1, a coupling device 2, a main electric motor 3 connected to a reduction gear 4, consisting of a worm 5 and a worm wheel 6. The worm to 5 and the worm wheel 6 form a self-braking gear. The drive is equipped with an additional electric motor 7 and a controllable clutch 8, for example, electromagnetic. One of the halves of the controlled clutch 8 is connected to the roller 1 of the roller table through the shaft of the additional electric motor 7 and the connecting device 2, and the second half is connected to the worm wheel 6 of the reduction gear 4.

The main motor 3 is designed to operate the roller table at a low speed range. An additional electric motor 7 is designed to operate the roller table at a high speed range. The overall speed range is defined as the product of the high and low speed ranges.

The device operates as follows.

When the roller table operates in the low speed range, the electric motor 3 is turned off, and the electric motor 7 and the controllable coupler 8 are turned on. Both halves of the controlled coupler 8 are connected. The main electric motor 3 rotates the rollers 1 of the roller table through a reduction gear 4, a controlled clutch 8, an electric motor 7 and a coupling device 2.

Joint venture

WITH

00

Yu

Oh Oh

When the roller table operates in the high speed range, the electric motor 7 is turned on, the controllable clutch 8 is turned off and both halves are disconnected. The electric motor 7 rotates the rollers 1 of the roller table through the connecting device 2. The worm wheel 6 of the reduction gear 4 is locked from rotation by the worm 5, so that the rotation from the electric motor 7 is not transmitted to the electric motor 3.

Compared with the prototype, the inventive device will expand the range of control of the frequency of rotation of the rollers of the roller table.

In the prototype, the speed control of the rollers of the roller table is provided by changing the speed of the electric motor, and the value of the speed control coefficient - K - is equal to the ratio of the nominal speed - hen to the Minimum speed of pmin, i.e.

V -. ) H - ------,

Pmin

In the claimed solution, the expansion of the speed range of the roller table rollers is achieved by supplying the drive with an additional electric motor and controlled clutch. The speed range of the roller table rollers is determined by declaring, in the mmb drive, a coefficient K equal to the product of the coefficients ki and K2, where Ki is the coefficient of the speed range of the main motor; Ka - coefficient of regulation of the rotational speed of the auxiliary electric motor.

The coefficient Ki is equal to the ratio of the nominal speed of the main electric motor. to the minimum frequency of rotation of the main electric motor, the coefficient Ka is equal to the ratio of the nominal frequency of the splicing of the additional electric motor Pd.nom to the minimum frequency of rotation of the additional electric motor Pd.my.

-

K Ki x Ke - G-9R-N-I9.M- at the State Dop.nom Poen.min Pdop.min

Example. With the coefficient K Ki K2 100 in the prototype drive, the coefficient K in the claimed solution will be equal to

K KtxK2 100x100 10000

In addition, the claimed technical solution in comparison with the prototype will improve the accuracy of regulation

rotational speeds. Improving the accuracy of speed control in the claimed solution is achieved by the fact that the invention allows the use of electric motors with lower control coefficients Ki and K2. In the general case, the electric motor rotational speed is pdv.Root-An, where Rp.ad is the set rotational speed of the electric motor, and An is the frequency tolerance of the electric motor.

The tolerance A p depends on the characteristics of the electric motor and is practically constant over the entire control range.

An 5x bed,

where d is the coefficient of accuracy of maintaining the rotational speed;

Phnom is the rated speed of the electric motor.

Dvd-j

Phnom

.dv

where is cdv. is the speed control coefficient. In this way

Phnom

to

Far East

-Pnom Oh

Phnom

TO

dv

(1 - d Kdv).

25 30;. 35 0 45

From the above formula it is seen that a decrease in the coefficient of regulation of the rotational speed of the Cdw engine. improves the accuracy of maintaining the rotational speed of the electric motor and, accordingly, the rotational speed of the roller of the roller table.

Example. When the coefficient of regulation of the frequency of rotation of the roller of the roller table K 100 and the accuracy factor of maintaining the rotation frequency (5 0.002 in the prototype, the accuracy of maintaining the frequency of rotation of the electric motor will be equal to

pda. - d - a x y

Phnom 100

x (1 - 0.002 x 100) (- o, 2)

that is, when the rotational speed of the motor deviates from the predetermined one, the accuracy of the speed control can reach 20%.

In the inventive drive, the speed control coefficient will be K Ki x Ka. You can take Ki «2 Kdv, then K K2Dv. and Kdv - LG. With K - 100 and b 0.002 in the drive being used

Phnom Kdv

Phnom

(1-6 X Kdv) (1 - (5 XVK)

 xff8r 0-0.002 xv / IQOb-0 0-0.02) 5

those. the deviation of the rotational speed of the electric motor from the predetermined one can reach a value of 2%.

Claims (1)

SUMMARY OF THE INVENTION -10 Roller table roller drive, comprising a main electric motor and an associated downshift, characterized in that, in order to expand the operational capabilities of the drive by providing a wide range of speed control of the rollers, it is equipped with a controllable coupling and an additional electric motor. coupled to a roller shaft and a reduction gear output shaft, wherein a controllable coupler is disposed between the roller table roller and a reduction gear output shaft.