SU1279857A1 - Support - Google Patents

Abstract

The invention relates to printing, more precisely to printing presses, and is intended to reduce the vibrations of printing cylinders of printing machines. In the support, each elastic element of the set is made in the form of discs 4-6 s, the central hole for mounting the attachment unit 9, and the friction element has an opening with edges beveled to its center for interaction with the set of elastic elements and is aligned coaxially with the node 9 are fastened and rigidly connected to the base 1. The edges of the opening of the friction element may have an involute shape. The support may have additional friction elements, made in the form of support wedges 19-22, for interacting with the respective sets of elastic elements 11-18, each set of elastic elements being rigidly connected to the attachment point 9 and symmetrically located in a plane perpendicular to the main set elastic elements 4-6. The angle formed by the bottom elastic with & element of the set and the lateral surface of the support wedge 19-22, is equal to (L 1-3. In addition, the support has layers 7, 8, 23-26 of material with increased damping capacity, located between the elastic elements 4-6, 11-18 4 Cp f-crystals, 3 ill. TsD; o SH) ate

Description

The invention relates to printing, and more specifically to printing presses, and is intended to reduce vibrations of printing cylinders of printing machines.

The purpose of the invention is to increase vibration isolation, reduce the dimensions of the support and, as a result, reduce its material consumption :.

Figure 1 shows a printing cylinder support for reducing oscillations acting along the axis of the cylinder} in Figures 2 and 3 — supports To reduce spatial oscillations of the printing cylinder.

The support of the printing cylinder contains a base 1, friction element 2 mounted on the base for interacting with a set of elastic elements by means of an aperture with edges 3 bevelled to its center, forming in cross section, for example, an involute, and the set of elastic elements is made in the form of disks 4, 5 and 6 with interlayers 7 and 8 of material with an improved damping capacity, while the assembly 9 is rigidly connected to the center of the set.

In addition, the support contains two additional pairs of mutual perpendiculars of elastic elements rigidly connected with a fixing unit made in the form of a cross 10 and perpendicular to the main elastic element and interacting with additional friction elements. Additional elastic elements can be made in the form of plates 11-18, leaning-. splints on supporting wedges 19-22, forming an angle of 1-3 with the bottom plate (Fig. 2 or discs similar to those shown in Fig. 1 and resting on friction elements with cone-shaped openings interacting with elastic elements (Fig. 1).

Between sets: plates or discs can be located interlayer 23-26 of a material with increased damping capacity, for example, of polyurethane. The mounting cylinder is installed. Bearing printing cylinder. Between the base and the friction elements a device with a wedge 27 can be located, which can, using a screw 28, rotated at the base 1, clamp the bearing assembly with a predetermined force. Between elastic elements and fixing

O

five

0

five

five

thirty

45

50

55

node 9 may be located rings 29 and 30 with spherical bulges and depressions.

The device works as follows.

The vibra- tion of the printing cylinder is transmitted through the fastening assembly 9 to the elastic elements. When they deflect along the axis of application of force, the deformation of the elastic elements occurs and their area of contact with the friction elements 2, V.9, 20, 21 and 22 changes and, as a result, friction increases, which increases the oscillation amplitude. An additional decrease in the amplitude of oscillations is achieved due to the internal friction in the layers 7, 8, 23-26. When the center of the mounting unit is displaced relative to the center of any of the friction elements, a slight rotation of the plane of the discs or plates takes place on the spherical bearing formed by rings 29 and 30. However, the total area of contact between the elastic and friction elements 2, 19-22 elements is almost proportional to the component forces axial direction for each pair of elastic - friction element.

Making the edges of the orifice 3 of a predetermined shape allows one to set a certain necessary characteristic of the nonlinear dependence of friction on the amplitude of oscillations.

The invention allows to significantly reduce oscillations of the printing cylinder and, as a result, to improve the print quality, reduce the noise generated by the printing presses.

Claims (3)

The invention relates to printing, and more specifically to printing presses, and is intended to reduce vibrations of printing cylinders of printing machines. The purpose of the invention is to increase the vibration insulation, reduce the size of the support and, as a result, reduce its material consumption :. FIG. 1 shows a printing cylinder support for reducing oscillations acting along the axis of the cylinder} in FIGS. 2 and 3 — supports For reducing the spatial oscillations of the printing cylinder. The support of the printing cylinder contains a base 1 mounted on the base of the friction element 2 for interacting with a set of elastic elements by means of a hole with edges 3 beveled to its center, forming in cross section, for example, an involute, and the set of elastic elements is made in the form of discs 4, 5 and 6 with layers 7 and 8 of material with a steady damping capacity, while the attachment point 9 is rigidly connected to the center of the set. In addition, the support contains two additional pairs of mutually perpendicular elastic elements, rigidly connected with a fastening assembly, made in the shape of a cross 10 and perpendicular to the main elastic member, and interacting with additional friction elements. Additional elastic members can be made in the form of plates 11-18, leaning. splints on supporting wedges 19-22, forming an angle of 1-3 with the bottom plate (Fig. 2 or discs similar to those shown in Fig. 1 and resting on friction elements with cone-shaped holes interacting with elastic elements (Fig. 1) Layers 23-26 of material with increased damping capacity, such as polyurethane, can be placed between the sets of plates or discs. A mounting cylinder bearing is installed in the mounting assembly. A wedge device 27 can be placed between the base and the friction elements, allowing using a screw 28 rotated at the base 1, the bearing assembly is pressed with a predetermined force. Rings 29 and 30 with spherical convexes and depressions can be located between the elastic elements and the fastening assembly 9. The printing cylinder vibrates through the fastening node 9 is transmitted to elastic elements. When they deflect along the axis of application of force, elastic elements are deformed and their area of contact with the friction elements 2, V.9, 20, 21 and 22 changes and, as a result, velichivaets friction, which increase leads to a decrease in the oscillation amplitude. An additional decrease in the amplitude of oscillations is achieved due to the internal friction in the layers 7, 8, 23-26. When the center of the mounting unit is displaced relative to the center of any of the friction elements, a slight rotation of the plane of the discs or plates takes place on the spherical bearing formed by rings 29 and 30. However, the total area of contact between the elastic and friction elements 2, 19-22 elements is almost proportional to the component forces axial direction for each pair of elastic - friction element. Making the edges of the orifice 3 of a predetermined shape allows one to set a certain necessary characteristic of the nonlinear dependence of friction on the amplitude of oscillations. The invention allows to significantly reduce oscillations of the printing cylinder and, as a result, to improve the print quality, reduce the noise generated by the printing presses. Claim 1. A support, preferably for the cylinder press membrane, comprising a base mounted on the base, at least one friction element for interacting with a set of plate elastic elements rigidly connected to the attachment point, characterized in that vibration isolation and downsizing, each resilient element of the set is made in the form of a disk with a central hole for mounting the mount, and the friction element has an opening with edges fastened to its center boron elastic elements disposed coaxially mount assembly Nome and rigidly connected to the base. 2. Support according to claim 1, characterized in that the edges of the opening of the friction element have an involute shape. 3. The support according to claims 1, 2, characterized in that it has additional friction elements in the form of bearing wedges for interacting with the corresponding sets of elastic elements, each 7 sets of elastic elements being rigidly connected to the attachment point and symmetrically in the plane perpendicular to the main set of elastic elements. D. Support pop. 3, characterized in that the angle formed by the lower elastic element of the set and the lateral surface of the supporting wedge is 1-3. 5. Bearing on PP. 1-4, characterized in that it has a layer of material with increased damping capacity, located between the elastic elements.