A rotary union adapted for connection on a support segment for a shaft includes a sensor disposed within a sensor housing, the sensor housing connected to the housing of the rotary union, and a sound conduit having first and second ends, the first end of the sound conduit being connected to the sensor housing, and the second end of the sound conduit being adapted to be connected to a second support segment for the shaft opposite the first support segment along the shaft, wherein the sensor includes a sensing element in physical contact with the first end of the sound conduit, the sensing element configured to provide a signal in response to vibration present along the sound conduit.

A roll stand for the rolling of rolling stock, especially metal products. The roll stand includes at least two chocks for mounting at least one roll, the roll being rotatably mounted in the chocks by its two cylindrical roll necks. A cylindrical neck bushing is arranged on the roll neck with radial play. A rotationally fixed annual axial bearing is axially offset from the neck bushing. The bearing arrangement for the roll necks in the chocks is formed as a plain bearing, preferably a hydrodynamic oil film bearing. When subjected to a load in a rolling process, the neck bushing moves and deforms not only in the radial direction, but also in the axial direction.

A bearing box for a rotating roll that delivers a high-temperature substance. The bearing box includes a bearing portion and a seal portion provided adjacent to the bearing portion and includes a first cooling liquid passage that is formed on the outer peripheral side of the bearing portion and through which a cooling liquid passes, and a second cooling liquid passage that is formed on the radially inner side relative to the first cooling liquid passage and on the outer peripheral side of the seal portion, the second cooling liquid passage communicating with the first cooling liquid passage to cause the cooling liquid to pass therethrough.

A system for monitoring the parameters representative of operating conditions of an oil film bearing, wherein an oil film is arranged between a static component and at least one rotating component defining an axis, said at least one rotating component being arranged inside said static component, the system comprising at least one pressure sensor to detect the oil pressure of said oil film; at least one distance sensor to detect the thickness of said oil film; at least one temperature sensor to detect the temperature of said oil film;
wherein the at least one pressure sensor, the at least one distance sensor, and the at least one temperature sensor are housed in said at least one rotating component.

To increase the load-carrying capacity or rolling capacity of a roll assembly in a rolling mill, throttle elements are used, which shut off the lateral flow of the lubricating film in a partial region between the roll neck and the bearing surface of the roll neck bearing assembly, thereby bringing about an increase in pressure in the lubricating film. At least one throttle element is embodied as an annular segment, forming an angular shut-off region for the lubricant in the annular gap. The invention makes it possible for existing installations to be easily retrofitted, without the need for structural modifications. In the case of new installations, the same load-carrying capacity as before can be provided while the dimensions of the installation space are reduced. The load-carrying capacity of the bearing assembly can be flexibly adjusted based on the dimensions of the shut-off region for the flow of lubricant.

A device for producing a releasable clearance-free position of a rolling bearing, having a rolling bearing which has an outer ring, an inner ring mounted on a shaft and a plurality of rolling elements arranged between the inner ring and the outer ring, and having a tensioning device mounted on the circumference of the rolling bearing outer ring for generating a radial preload which is uniform over the outer circumference of the rolling bearing outer ring between the tensioning device and the rolling bearing outer ring, wherein the tensioning device has an axially adjustable tensioning element which can be brought into a first alignment in which the rolling bearing has play, and which can be brought into a second alignment in which the rolling bearing is free of play. A corresponding method is also described.

The invention relates to a device and a method for mounting a bearing 200 on a roll neck and for removing the bearing from the roll neck of a roll. Known devices of this type have a first and a second piston/cylinder unit. They also have a stop ring 130, fixed in the axial direction A at the end of the roll neck 320 remote from the body, which actsas a stop for the inner piston 110 of the first piston/cylinder unit. In addition, the known devices have a nut 150 which can be screwed onto an external thread of the inner piston to secure the bearing 200 in the axial direction, in particular during a rolling operation. As an alternative to the known prior art, the present invention provides that an annular cylinder 120 serves both as a cylinder for the first piston/cylinder unit and as a cylinder for the second piston/cylinder unit. For its function as a cylinder for the second piston/cylinder unit, said annular cylinder is covered to a certain ex ent on its side remote from the body by an annular cylinder cover 122. The cylinder cover 122 serves, together with an outer flange 142 of an outer piston 140, to axially delimit a removal pressure chamber 2 of the second piston/cylinder unit.

An oil film bearing includes a journal bush and accommodates a conical roll journal of a backup roll in a rolling mill stand. In order to form a sufficiently large lubricant film gap between the inner side of the journal bush and the outer surface of the roll journal during rolling operation when passing through the angular range with maximum pressure load, and at the same time to prevent the axial forces acting on a fastening ring holding the journal bush on the roll journal in the axial direction from becoming too great, the journal bush to be designed in accordance with the following formula: 0.35<3.6/a (D?B)+kD<0.5, where D refers to the outer running diameter of the journal bush, a refers to the projected cone length of the conical longitudinal portion, k refers to a sliding coefficient, and B refers to the large cone diameter.

A bearing system includes: a rotatable shaft, a circumferential channel in the shaft with an axially extending profile surface at least part of which is inclined relative to the shaft axis; a bearing, around the shaft in use; a split ring in the circumferential channel in contact with the inclined profile surface, the split ring includes a first part having an outer diameter, and a second part having a greater outer diameter than the first part to provide a thrust surface; a collar, including an internal bore to accommodate the first part of the split ring in use; and a bearing locator for exerting an axial locating force between the split ring and the bearing to locate the bearing on the shaft. An axial thrust load exerted on the split ring by the shaft is transmitted to the collar by the thrust surface, and the split ring is urged along the inclined profile surface so as to produce a radial load on the split ring which is resisted by the collar.

The invention relates to a rolling stand and a rolling mill for the rolling of preferably metallic rolling stock. Known rolling stands of this type typically have two back-up rolls (110) which are rotatably mounted by way of their roll journals in chocks which function as oil film bearings. The oil film bearings are supplied with coolant and/or lubricant by means of a low-pressure circuit which has at least one low-pressure pump (130) for conveying the coolant and/or lubricant. To reduce the costs for driving the low-pressure pump (130), there is provided according to the invention a gear mechanism which is arranged on the roll face-remote side of at least one of the chocks in order to rotationally couple the at least one low-pressure pump (130) to the back-up roll journal (120) which is rotatably mounted in the chock.