SU975858A1 - Booster roll of papermaking machine - Google Patents

Description

The invention relates to the pulp and paper industry and is intended for use in the press parts of paper and board-making 5 machines to prevent the formation and straightening on endless cloth folds and wrinkles, acceleration of cloth in width (from the middle to the edges).

The same shafts are used for the same purposes as canvas (paper or cardboard) and are installed after the drying part and calender, as well as in finishing machines.

The accelerating shaft is known, which includes a trunnion, bearing supports, a cylindrical jacket, to the outer surface of which copper wires are screwed along a screw liri, and on one half of the left-hand solder bar is wound, and on the other. 20 goy - right, the step of winding increases * from the middle to the edges. In rubberized accelerating shafts a rubber band is glued along a helix (Ts.

The lack of a shaft of such a construction is an increase in wear of the cloth due to friction of strips placed along a helix, on the cloth.

 Also known accelerating shaft, including a fixed core, set-ί30

2

A rotating cylindrical jacket fixed on it on bearing supports, along the outer surface of which there are a large number of elastic bands, two inclined rotating end rings of a complex construction, in which the ends of elastic bands are fixed.

The acceleration of the cloth is carried out due to its contact with elastic strips, successively stretching during rotation of the inclined collars [2].

The disadvantages of this design are its complexity, lack of effective acceleration due to the heterogeneous density of the contact of the cloth with elastic bands.

Known accelerating shaft, which represents a shirt in the form of a rubber tube with metal cartridges (pins) fixed at the edges. A spiral metal tape (spring) is embedded in the body of the pipe. Under the shaft there are several roller bearings for adjusting the shaft deflection. The shaft is mounted in bearings [3].

The disadvantage of this shaft is

the need to use rubber ">

shells subject to wear, low-resistant under high temperature conditions

3

97,5858

four

difficult to manufacture and costly. The use of a rubber shell, thus, leads to a decrease in the reliability of the shaft and the complexity of its design.

Known. Also the accelerating shaft of the bu- barbing machine, including a flexible cylindrical jacket and a core, between which bearings are installed, a device for changing the shaft deflection [4]. ten

The disadvantage of the limestone shaft is that in order to regulate the shaft deflection, it is necessary to use special complex additional mechanisms that increase the dimensions of the wa-15 la, complicating its design and increasing its metal consumption.

The purpose of the invention is to simplify the design and increase the reliability of the shaft. 20

This goal is achieved by the fact that the device to change! deflection of the accelerating shaft of a papermaking machine, containing a flexible cylindrical jacket and core, between which bearings are installed, made in the form installed on the core from the side opposite to the direction of the shaft deflection along its generator, two pairs of protrusions and connecting each pair of projections of clamping screws between the protrusions of each pair is less than half the length of the core. The core may have cuts on the side opposite to the direction of the deflection.

FIG. 1 shows the basic shaft design; in FIG. 2, section A-A in FIG. 1 (at the place of installation of bearings). 40

The shaft includes a flexible shirt 1, consisting of sleeves 2, connected by bellows 3, a solid core 4, bearings 5 mounted between them. 45

The shaft from both ends is equipped with coupling screws b, which are fixed to the core 4 in the projections 7 and rotate in the nuts, also made in the form of the projections 8 of the core. Support screw 7 here and nut 8 are from each other at distances less than 1/2 the length of the core.

The core has notches 9 on the side opposite to the direction of the proddle. "

The flexible jacket can also be made in the form of a spring or the connection between the sleeves can be in the form of springs.

Shaft works as follows.

When turning the screw b in the protrusions 7 and 8, the bending moment is transmitted to the core 4 and the core bends. When the deflection of the core 4, the forces are transmitted through the bearings to the jacket 1, which also bends.

Due to the cut-outs 9, the bending of the core is ensured with reduced efforts in the screw mechanism.

If the shaft of the shaft is bent, then a curvilinear accelerating surface is formed, passing along which the moving web straightens and is eliminated. folds.

Due to the possibility of regulating the deflection of the shirt, optimal conditions are provided for the acceleration of any canvases and the efficiency of acceleration is increased, and therefore the quality of the products is improved.

Claims (2)

Claim .one. The accelerating shaft of the papermaking machine, containing a flexible cylindrical jacket and core, between which bearings are installed, a device for changing the shaft deflection, characterized in that, in order to simplify the shaft design and increase the reliability of its work, the tool for changing the shaft deflection is made in the form installed on the core on the side opposite to the direction of the shaft deflection along its generatrix, two pairs of protrusions and connecting each pair of protrusions of coupling screws, while the distance between the protrusions azhdoy pair is less than half the length of the core. 2. Val pop. 1, characterized in that the core has cuts on the side opposite to the direction of the deflection.