A seal assembly for sealing a shaft bearing includes a seal housing, first and second seal rings retained by the seal housing, an annular chamber formed between the first and second seal rings and a connecting channel configured to place the annular chamber in fluid communication with a bearing-housing-side oil space. When the seal assembly is installed on a shaft, the connecting channel is configured to permit a fill-level equalization between the oil space and the annular chamber when the oil space is filled to a first possible fill level (N.sub.1) and to prevent the fill-level equalization between oil space and annular chamber when the oil space is filled to a second possible fill level (N.sub.2).

Balancer shaft 5 and 6 rotatably set through bearings 1114 and an oil pump 2 driven by power from the balancer shaft 5 and 6 are provided in a balancer housing. Oil discharged from an outlet portion 42 of the oil pump 2 is supplied to a main oil gallery 10 through an outlet passage 48. A bearing filter 55 that filters a part of the oil is provided in the outlet passage 48 that extends from the outlet portion 42. A communication passage 50 that branches off from the outlet passage 48 and communicates with the bearings 1114 supplies a part of the oil having been filtered by the bearing filter 55 to the bearings 1114. By filtering the oil that is going to be supplied to the bearing portion, decrease in durability of the bearing portion can be suppressed.

A bearing assembly includes: a shaft; a housing; a support structure; at least one first seal; at least one electrode connected to the support structure and arranged between the support structure and the shaft such that an oil vapor from the oil bath, which passes through the at least one first seal, must pass through a gap between the at least one electrode and the shaft in order to escape, the bearing assembly being configured for an electrical voltage to be applied between the at least one electrode and the shaft so as to direct oil particles contained in the oil vapor onto the at least one electrode such that the oil particles are separated at the at least one electrode; and a drainage channel configured for enabling oil separated at the at least one electrode to flow through the drainage channel into the oil bath.

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.

In an exemplary embodiment, a sliding component includes a pair of sliding parts 4 and 7 sliding relatively to each other and having sliding faces S formed radially for sealing a liquid or a misty fluid as a sealed fluid against leakage. One sliding part is a stationary-side seal ring 7, and the other sliding part is a rotating-side seal ring 4. At least one of the sliding faces S is provided with positive pressure generation mechanisms 11 having positive pressure generation grooves 12 configured to communicate with a circumferential edge of the sliding face S on the sealed-fluid side and not to communicate with a circumferential edge on the leakage side, and discharge grooves 10 disposed at an angle such that upstream ends are located on the leakage side and downstream ends are located on the sealed-fluid side.

Provided is a linear compressor including a linear motor having a mover reciprocating with respect to a stator; a piston coupled to the mover to reciprocate; a cylinder into which the piston is slidingly inserted, the cylinder having an inner circumferential surface forming a bearing surface together with an external circumferential surface of the piston, the cylinder forming a compression space together with the piston, and the cylinder having at least one first hole formed through the inner circumferential surface of the cylinder and an outer circumferential surface of the cylinder to guide refrigerant discharged from the compression space to the bearing surface; and a porous member inserted into the outer circumferential surface of the cylinder and configured to cover the first hole, the porous member having multiple micropores smaller than the first hole.

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.

The invention concerns a device (1) for hoop reinforcing of restrictors inside at least two hydraulic supply standby systems of a journal bearing. Said device is remarkable in that it comprises: a frame (2) for receiving said hearing, a syringe (3) for introducing said restrictors and a torque pick-off spindle (4), and in that said frame (2) comprises: a cradle (21), a guide plate (23) pierced with two guide openings (231), inclined at the same angle as those of said backup systems of the bearing, so as to be located in the extension of same when the bearing is in the frame, said guide openings (231) being shaped to receive said syringe (3) or said torque pick-off spindle (4).

A lubricating oil passage portion that constitutes a cooling portion is exposed to the outside from a casing. Lubricating oil having absorbed heat of a thrust bearing portion and a journal bearing portion is cooled in the cooling portion, when the lubricating oil moves from an upper oil chamber to a lower oil chamber while circulating by use of gravity. Thus, the circulating lubricating oil prompts cooling of the heated thrust bearing portion and journal bearing portion. Additionally, the lubricating oil passage portion of the cooling portion is provided integrally with the casing, on the radially outer side of the casing.

A journal bearing, in which a lower half carrier ring is disposed on the outer peripheral side of a horizontally installed rotating shaft, and an upstream side pad and a downstream side pad are disposed on the inner side of the lower half carrier ring, includes an upstream side oil supply portion and downstream side oil supply portion which supply lubricant oil to the upstream side pad and downstream side pad, the bearing being characterized in that the supply quantity of lubricant oil supplied from downstream side oil supply nozzles of the downstream side oil supply portion is adjusted so as to be less than the supply quantity of lubricant oil supplied from upstream side oil supply nozzles of the upstream side oil supply portion.