Trelleborg Sealing Solutions Germany Gmbh

Mandy Wilke

Holger Jordan

Tobias Corneli

A slotted guide ring for a piston-cylinder unit has a first free end portion and a second free end portion, which are arranged at a distance from one another in the circumferential direction of the guide ring, forming an axial through gap, and the end faces of which are arranged parallel to one another or substantially parallel to one another. In their projection on the central axis Z, the end faces enclose an acute angle α with the central axis Z of 15°≤α≤75°. On the guide side, a lubricant channel is formed which extends from the first free end portion to the second free end portion and which is open on both sides towards the axial through gap. The invention further relates to a piston-cylinder unit with such a guide ring.

Slotted guide ring with recirculating lubrication and piston-cylinder unit

A seal assembly includes a first and second machine element, a seal and a support ring. The support ring has a first side edge facing a high-pressure side which is partially convexly curved, formed obliquely or is partially formed at an acute angle relative to a movement axis of the two machine elements. The seal has a retaining portion and a primary sealing lip extending from the retaining portion on the high-pressure side and abuts in a dynamically sealing manner against a sealing surface of the second machine element. The primary sealing lip directly abuts and is supported over the majority of its longitudinal extent on the first side edge of the support ring on the low-pressure side. The retaining section of the seal is held clamped between the support ring and the first machine element and abuts the first machine element in a statically or indirectly statically sealing manner.

Seal assembly

A seal arrangement includes a first and a second machine part which are arranged spaced apart from one another with the formation of a sealing gap and can be moved relative to one another about a movement axis. A seal element with a base section is arranged on or in a seal holding structure of one of the two machine parts. A sealing head bears in a dynamically sealing manner by way of a sealing section against a sealing surface of the respective other machine part in order to seal a high-pressure side from a low-pressure side. The seal element on the high-pressure side has at least one flow element, wherein during relative movement of the two machine parts fluid on the high-pressure side in the area of the sealing section of flows onto the sealing head.

Seal arrangement and seal element with a high-pressure side flushing function

A rotary seal seals a high-pressure region from a low-pressure region and has an assembly sleeve made of a rubber elastic material and at least one pressure-activatable rotary seal element with a seal edge. When a specified differential pressure value is exceeded, the seal edge of the rotary seal element rests sealingly against the seal surface of a machine part, thereby directly displacing a support element elastically supported on the rubber elastic assembly sleeve. When the specified differential pressure value is undershot, the support element is moved rearwards axially in the direction of the high-pressure region such that the seal edge of the rotary seal element is moved backwards into the seal edge rest position in which the rotary seal element lies against the seal surface without contact surface pressure or substantially without contact surface pressure or is arranged at a distance from the seal surface.

Pressure-activatable rotary seal and rotary seal assembly

A seal arrangement includes a first and a second machine part able to move relative to each other about a movement axis and forming a sealing gap. A seal element has a base section retained on a seal retaining groove structure of one of the two machine parts, and has a sealing head that bears with a sealing section in a dynamically sealing manner against a sealing face of the respective other machine part sealing a high-pressure side, that can be charged with pressurized fluid, of the sealing gap with respect to a low-pressure side of the sealing gap. The sealing head and the base section are connected by an elastically deformable connection section of the seal element, which has a non-linear cross-sectional profile and multiple regions of weakened material arranged spaced apart from one another in sequence, preferably regularly, in the circumferential direction of the seal element.

Seal arrangement with improved lubrication behavior

A seal arrangement includes first and second machine parts rotationally movable and forming a sealing gap. A radial shaft seal ring seals a high pressure side against a low pressure side. A base section held on a sealing holding structure of the first machine part has a sealing head contacting the sealing surface of the second machine part. The sealing surface has a high and low pressure first sealing surface sections. The first sealing surface section extends away from the sealing holding structure forming an acute angle. The sealing head contacts the first sealing section when an operating pressure is applied to the high pressure side, said operating pressure being smaller than a specified limit operating pressure value. The second sealing surface section forms an axial stop for the sealing head when an operating pressure is applied to the high pressure side being at least the limit operating pressure value.

Growing community of inventors

Böblingen, Germany

Mandy Wilke