摘要:
A press roll with controllable deflection, for treatment of web type material, specifically for the treatment of a paper web (2), with a roll shell (1) that is rotatably connected with an axle (10) serving as flexural backing and defining with it an annular intermediate space. Within this intermediate space, in the area of the roll ends, there is a seal (transverse seal 18) each provided, and at that, in such a way that between the end of the roll shell (1) and the transverse seal (18) there remains on both sides of the web-shaped material (2) a free marginal zone (R). There is provided on each roll end, in the area of the marginal zone (R) on the inside of the roll shell (1), a channel type cavity (6) that can be charged with a heat transfer fluid. This makes it possible to directly and specifically influence thermally the diameter of the roll, on both ends of the roll in the area of the marginal zones, so that diameter differences between the marginal areas of the roll and the center area can be compensated for in the operation of the press roll.
摘要:
A sag compensating roll having a stationary yoke for taking up bending forces, a hollow roll shell surrounding the yoke and hydrostatic support elements between the yoke and the shell. Each support element having a pressure shoe facing the inner surface of the shell defining a slide surface at the shell. Relief pockets recessed into the slide surface. A pressure space defined between a first piston on the yoke and the pressure shoe, and the shoe is radially movable with respect to the first piston. A pressure fluid line communicates with the pressure space and, by capillaries from the pressure space, communicates with the relief pockets. The pressure space and the relief pockets are dimensioned so that the active surface of the relief pockets is larger than the active surface of the pressure space acting on the support element. A further fluid supply line delivers temperature equalization fluid to an additional pocket located at the circumferentially downstream trailing side of the pressure shoe, at the inner surface of the roll shell. The further fluid is picked up by the inner surface of the roll shell after the shell has moved past the relief pockets. Pressure and/or quantity control between a common source of pressure fluid and each of the pressure fluid line and the additional fluid line may be provided.
摘要:
Press roll with a tubular cylinder, featuring on each of its two ends a roll head with a journal, specifically for use in a roll press consisting of the press roll and a backing roll with controlled deflection, for the treatment of web type material such as a paper web or the like. The inside surface of the tubular cylinder is so shaped across the web width that the shape of the flex line of the tubular cylinder will approximate during operation the flex line of the roll shell of the backing roll. This yields a press roll having a relatively thin-walled tubular cylinder which is lightweight. Nonetheless, an extensively constant line force is achieved in the press gap of the roll press across the web width.
摘要:
Located in a stationary frame is a cylinder-piston unit, the piston of which is adapted to displace the bearing housing of a roll in a paper-making machine at right angles to the longitudinal axis thereof. The bearing housing is guided in the frame with the aid of linear guide-elements. The radial play between the piston and the cylinder-bore is greater than the transverse play between the said linear guide-elements. Furthermore, the axial length of the piston is less than the depth of the cylinder-bore. Whenever the cylinder-piston unit is relieved of its load, and the cylinder thus returns to its position of rest, it is centered in the cylinder-bore by means of a centering device.
摘要:
A press roll for a web includes a support body which is either stationary or rotatable and a press shell which is rotatable over the support body and against a mating roll. A respective shell support element or disc is disposed axially outward of both ends of the support body and the support element has an axially outward, face side. The flexible, liquid impervious endless belt press shell has lateral edge zones. Each edge zone has a respective plurality of outwardly projecting tongues and has cutouts between neighboring tongues. The edge zone is turned radially inward and its tongues are each respectively mounted on a holding element projecting from the face side of the shell support element. Centering elements also ono the face side of the shell support element are placed each for extending into and contacting the base of the cutouts between neighboring tongues for positioning the tongues.
摘要:
A long nip press roll includes a stationary support member and a flexible, tubular, inflatable press shell which is supported to rotate around the support member by axially separated support discs rotatable around the support member. A radially displaceable press shoe is supported on the support member for pressing outward against the press shell against a counter roll in the press plane. To enable the press roll to be used in a press where it is disposed either beneath or above the counter roll, all of the internal lines in the support member, e.g. those for the supply and discharge of pressure oil, lubricant and cooling oil and press shell pressurizing air, include two sets of coupling for coupling them to external lines, a respective set of the couplings being located at each axial end of the press roll. During assembly, one of the sets of couplings at one end is connected to external lines, and the other set of couplings is closed.
摘要:
Spur gearing including an outer gear rim firmly attached to the roller to be driven. A first self-aligning bearing disposed within the outer gear rim mounts the gear rim to a firm support. A pinion outside of the outer gear rim meshes with the outer gear rim. A journal in the pinion connects it to a support bracket. A second self-aligning bearing joins the pinion to the journal. A pinion driving coupling shaft is coupled to the pinion for driving the pinion to rotate. The pinion can incline with respect to the coupling shaft. To limit the angle of tilt of the pinion, in one embodiment, there is a third self-aligning bearing within the pinion to one axial side of the second bearing and a radial gap between an extension of the journal for the second bearing and the third bearing, for allowing and limiting tilting of the pinion axis, and the elements are so sized that the tilt angle of the pinion is limited to about 1.degree. and preferably to less than 0.6 .degree.. In the second embodiment, instead of the third self-aligning bearing, the tilt angle limiting device includes a first pair of collar disks respectively on one axial side of each of the outer gear rim and the pinion gear, and a second pair of collar disks on the other axial side of those gears. The collar disks are so dimensioned that there is normally a radial gap between the disks of both pairs. Beyond a predetermined tilt angle of about 1.degree. and preferably of less than 0.6.degree., depending upon the direction of tilt of the pinion, a pair of the collar disks engage to limit the tilting of the pinion.
摘要:
A roll arrangement for calendars or super-calendars is provided by the combination of two rolls which together form a press nip wherein one of the rolls is solely deflection-controllable and the other roll is solely temperature-controllable zone by zone. The temperature-controllable roll has a tubular rotatable roll shell and a stationary core extending through the roll shell. The space between the roll shell and the core is divided by means of several peripheral seals into numerous annular chambers. A flow of fluid is guided through each of the annular chambers. The fluid temperature in each annular chamber is independently controllable. Consequently the temperature-controlled roll shell can be heated by the fluid to different degrees along the axis thereof to control its external diameter along each zone. The peripheral seals are sized to have free play in a direction transverse to the roll axis and are constructed as endless, metallic rings. The external diameter of the rings is a trifle smaller than the internal diameter of the roll shell.
摘要:
A press roll for acting in opposition to a counter roll. The press roll has a support member which is supported at its opposite ends. The support member is stationary in certain most embodiments and rotatable in one embodiment. A flexible, liquid-tight endless press jacket is wrapped around the support member. At each lateral end of the press roll, the press jacket is fastened to the outward end of a supporting disk, which is rotatably mounted on the support member. The lateral edge zones of the press jacket are both deformed radially inwardly around the outside of the respective supporting disks and each edge zone is clamped there by a annular clamping flange. To facilitate deformation of the edge zones, at least one of the edge zones terminates in a series of tongues separated by cutouts arrayed around the roll. Coiled tension springs engage the edge zone and/or the tongues to pull them in the direction toward the axis of the roll.
摘要:
A drying cylinder adapted to receive steam therein includes a cylindrical cylinder jacket and two end covers. There is a flange connection between the jacket and the covers. The jacket has a rectangular cross-section flange. The covers have an L-shaped flange which receives the end flange of the cover. The covers are concave to the outside of the cylinder. The point of intersection of a curved line through the cover and of the axial center line of the axial arm of the cover flange lies at a distance from the outer face of the flange of the end cover that is at most about 60% of the axial length of the axial arm of that flange. There is thermal insulation on the axially exterior side of each cover.