RU190203U1 - Compensator for short-term changes in belt tension from harnesses - Google Patents

Abstract

A compensator of short-term changes in the tension of a tape from harnesses consisting of a cylinder (impregnating drum), coaxially with which two arms are formed along its ends, two shoulders composite arms, the ends of the shoulders of which are connected by two tape guides. between the shoulders of the composite arms with ribbon conductors. Changing the size of the arms of the arms allows you to expand the range of regulation of the tension of the tapes of the harnesses. With a uniform movement of the tape s harnesses sum of the moments of the forces acting on lentoprovodniki is zero (ie, the system is in equilibrium). When any change in the tension of the tape from the harnesses on one of the tape guides, the system exits the equilibrium position and, due to the rotation of the double-arm levers around its axis, changes the tension of the tape from the harnesses on the opposite tape conductor, thereby trying to balance the moments of both compensator tapes, preventing the tape from slipping from the harnesses on the cylinder (impregnating drum).

Description

The invention relates to devices for regulating the tension of a tape from bundles of reinforcing fibers in the manufacture of products from composite materials by the method of wet winding.

To obtain high-strength shells made of composite materials, one of the conditions is to ensure uniform distribution of the polymer binder along the reinforcing fibers. Such a distribution is possible only at the stage of impregnation of the reinforcing filler, taking into account the specified tension of the tape from the harnesses during the passage of the forming path and applied to the rotating mandrel depending on the winding modes, viscosity and temperature state of the polymer binder, and also depending on the heat setting modes.

During the impregnation process, a tape of bundles bends around the impregnating drum tangentially, due to friction forces, causing it to rotate around an axis. With a sharp change in the tension force of the tape from the harnesses, it creeps along the impregnation drum, which leads to uneven impregnation with its binder.

Known installation for the manufacture of tubular products made of composite material, equipped with a belt tension compensator, consisting of a spring-loaded lever rocking on the axis, the free end of which is equipped with a ribbed roller (patent RU 2209731 C2 dated 02.19.2001 published 10.08.2003)

It is also known a device for the manufacture of articles made of composite materials by the winding method, equipped with a compensator for short-term changes in belt tension, made in the form of parallel rollers, the ends of which are fixed in two disks with axes for fastening them, one of which is connected via a spiral spring to the compensator housing (patent RU 2322350 С2 dated 02.05.2006 was published on 04/20/2008, Bull. No. 11)

The above tension straps from the harnesses work according to the principle that when the straps of the harnesses are evenly tensioned, the moment of force from the straps of the straps is balanced by the moment of force created by the spring, and if the tension of the straps changes briefly from the harnesses, the moment of force of the spring tends to return the system to equilibrium thereby compensating for the short-term changes belt tension from the harnesses.

The disadvantage of such tension compensators of the tape from the harnesses is that they cannot synchronously compensate for the short-term changes in the tape from the harnesses before and after the impregnation drum passes through the impregnating device.

The technical task is to create a device with high accuracy of controlling the tension of the moving tape from the harnesses in the impregnating device and improving the quality of its impregnation with a binder.

The technical result from the use of the utility model is to improve the accuracy of regulating the tension of a moving tape of harnesses and improve its quality of impregnation with a binder, as well as the quality and strength of products made from it.

The technical result is achieved as follows. During the impregnation with the binder, the moving tape from the harnesses passes through the impregnating device with a drum partially immersed in the binder of the impregnating bath. Adjustment of the bonding agent on the impregnating drum is carried out with a knife due to a change in the knife-drum gap.

To prevent slippage of the tape from the harnesses on the impregnating drum into the impregnating device, we install a compensator for short-term changes in the tension of the tape from the harnesses consisting of an impregnating drum coaxially with which two shoulders are installed along its ends, the ends of the arms are connected by two tape guides.

Adjustment of the angle of coverage of the tape from the impregnation drum harnesses is carried out by changing the angle between the arms of the composite arms with tape guides.

Changing the size of the arms of the levers allows you to expand the range of regulation of the tension of the tape from the harnesses.

With a uniform movement of the tape from the harnesses, the sum of the moments of forces acting on the tape guides is zero (i.e., the system is in equilibrium). When any change in the tension of the tape from the harnesses on one of the tape guides, the system exits the equilibrium position and, due to the rotation of the double-arm levers around its axis, changes the tension of the tape from the harnesses on the opposite tape conductor, thereby trying to balance the moments of both compensator tapes, preventing the tape from slipping from the harnesses on the impregnating drum.

This technical solution allows to improve the accuracy of regulation of the tension of the tape from the bundles of reinforcing fibers and to improve the quality of its impregnation with a binder and as a result, improves the quality and durability of products produced by the method of wet winding.

New technical solution is the result of research and experimental studies without the use of standards or recommendations in this field of technology, obtained creatively, meet the criterion of "inventive step".

This utility model is illustrated by a drawing and a brief description of it:

FIG. 1 shows the compensator for short-term changes in the tension of the tape from the harnesses in the impregnating unit.

The compensator for short-term changes in the tension of the tape from the harnesses (1) is built into the impregnating device consisting of a bath (2) with a binder (3), an impregnation drum (4) partially immersed in a binder (3), while rotating it, a part of the binder (3 ) sticks to the impregnating drum (4), the thickness of the layer of adhesive that adheres to the impregnating drum (4) is regulated by a knife (5) installed in front of the impregnation zone by changing the knife-drum gap. During the impregnation, the tape from the harnesses (1) passes between the two tape guides (6), bending around the upper part of the impregnating drum (4). The ribbon guides (6) are located at the ends of the arms (7) of the double-arm composite arms, which are aligned with the impregnation drum (4) at its ends. The angle of coverage (8) of the tape from the harnesses (1) of the impregnation drum (4) is adjusted by changing the angle (9) between the shoulders of the double-arm composite arms.

Changing the size of the shoulders of the double-arm composite arms (7) (due to the sliding part (10)), allows you to extend the range of regulation of the belt tension from the harnesses (1).

The compensator short-term changes in the tension of the tape of the harnesses works as follows.

With a uniform movement of the tape from the harnesses (1) in the impregnating device, the sum of the torques acting on the tape guides (6) is zero (i.e., the system is in equilibrium). When any change in the tension force of the tape from the harnesses (1) on one of the tape guides (6), the system exits the equilibrium position and due to the rotation of the double-arm composite arms (7) around its axis, it changes the tension force of the tape from the harnesses (1) on the opposite tape conductor (6 ), thereby seeking to balance the moments of forces of both the tape guides (6) of the compensator, preventing the tape from the harnesses (1) from slipping along the impregnating drum (4).

When changing the position of the double-shouldered composite arms (7) relative to the axis of rotation, the angle of coverage (8) of the tape from the harnesses (1) of the impregnation drum (4) remains constant.

The angle of coverage (8) is adjusted by a tape from the harnesses (1) of the impregnation drum (4) by changing the angle (9) between the arms of the composite arms (7) with tape guides (6).

Changing the size of the shoulders of the double-arm composite arms (7) at the expense of the sliding part (10) allows you to expand the range of regulation of the tension of the tape from the harnesses.

The use of a device for compensating short-term changes in the belt tension of harnesses (1) in actual production conditions showed positive results. It can work both in the impregnating unit and in any place of the conveyor duct.

Thus, a new technical solution is effectively reproduced industrially, confirms a new technical result in comparison with the known prior art, meets the criterion "industrial application".

Claims (3)

1. Compensator short-term changes in the tension of the tape from the harnesses containing an impregnating drum located in a bath with a binder, on the ends of which are two-arm composite arms with the possibility of changing the angle between the shoulders and the size of the shoulders, while the ends of the shoulders are connected by two tape guides. 2. The compensator under item 1, characterized in that the adjustment of the angle of coverage of the tape from the bundles of the impregnating drum is carried out by changing the angle between the arms of the composite arms with tape guides. 3. The compensator under item 1, characterized in that the change in the size of the arms of the arms allows you to expand the range of regulation of the tension of the tape from the harnesses.

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