Abstract: A housing for a magnetic fluid sealing device and an agitation kettle/reaction kettle are disclosed. The housing includes: a first end cover, a casing and an elastic member. The first end cover is spaced apart from a first portion of the casing in radially inward and outward directions of the casing. At least one of the casing, a positioning platform and the first end cover is provided with a mounting groove, and the elastic member is arranged in the mounting groove. A first sealing ring is provided between the casing and the first end cover.

Abstract: 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.

Abstract: A retainer device is for a seal assembly for sealing between a shaft rotatable about a central axis and a housing having a bore. The seal assembly includes at least one annular seal disposed within the housing bore and about the shaft and at least one spring for biasing the seal along the axis. The retainer device includes a generally annular body disposeable within the housing bore so as to be spaced axially from the at least one seal. The body is coupleable with the housing such that the body is generally nonrotatable about the central axis and includes at least one retainer lug extending at least generally axially from the body. The lug is engageable with the seal to prevent angular displacement of the seal about the axis. The body has at least one generally radially-extending spring contact surface contactable by an end of the at least one spring.

Abstract: A magnetic fluid sealing device is disclosed. The magnetic fluid sealing device includes a housing, a shaft, and a magnetic sealing member. The housing has a cavity containing a magnetic fluid. One end of the shaft extends out of the housing through a first through-hole. The outer peripheral face of the shaft is provided with liquid injection grooves with one end extending out of the housing. The magnetic sealing member is located within the sealing cavity and includes at least one magnetic source and a plurality of pole shoes. The plurality of pole shoes are arranged at intervals in a length direction of the housing. The magnetic source is connected between two adjacent pole shoes. A sealing gap in communication with the liquid injection groove is defined between the plurality of pole shoes and the shaft.

Abstract: A seal ring is provided for sealing a rotating shaft. The seal ring has an outer wall and an inner wall. The outer wall includes one or more external ribs, and the external ribs are disposed along a circumferential direction of the outer wall. The inner wall includes one or more seal contact parts extending inwards from the inner wall, and the seal contact parts are disposed along a circumferential direction of the inner wall. The seal ring is made of an elastic material.

Abstract: A piston ring and a method of manufacturing a piston ring for a piston of a reciprocating internal combustion engine. The piston ring comprises a body having an outer circumferential surface. A tribological coating is formed on the outer circumferential surface of the body. The tribological coating has a dual layer structure and includes a relatively hard base layer and a relatively porous top layer overlying the base layer.

Abstract: [Object] To provide a seal ring capable of both reducing a friction loss and reducing oil leakage. [Solving Means] A seal ring includes: an inner circumferential surface; an outer circumferential surface orthogonal to the inner circumferential surface; side surfaces orthogonal to the inner circumferential surface and the outer circumferential surface; and a plurality of pockets provided, spaced apart from one another in one of the side surfaces. The plurality of pockets each have a symmetrical shape in a circumferential direction and are opened on a side of the inner circumferential surface and closed on a side of the outer circumferential surface.

Abstract: This seal structure 1 is provided with an annular seal member 2, a shaft member 4 having a seal groove 5 where the inner peripheral side of said seal member 2 is arranged, and an inner peripheral wall member 6 which has an internal space surrounded by an inner peripheral wall 61, wherein the shaft member 4 is arranged in the internal space 62, and the annular seal member 2 is arranged in the seal groove 5 of the shaft member 4. The side of the outer periphery 21 of the annular seal member 2 is formed by overlapping, in the axial direction D1, a plurality of ring-shape parts 3 which are closed or unclosed when viewed in a radial direction D2; when viewed in the radial direction D2, on one side of a center axis C1 of the annular seal member 2, in a longitudinal cross-section of the plurality of ring-shape parts 3, one corner 32 of the two corners of the edge 31 facing the inner peripheral wall 61 of the inner peripheral wall member 6 contacts the inner peripheral wall 61 of the inner peripheral wall member 6.

Abstract: A sealing device with convertible magnetic sealing medium includes a housing with an accommodation cavity formed therein, a rotary shaft rotatably disposed in the accommodation cavity, a first pole piece disposed on the rotary shaft, a second pole piece fitted over the rotary shaft, and a permanent magnet fitted over the rotary shaft between the first pole piece and the second pole piece. The rotary shaft has a first blind hole, a second blind hole, a first via hole and a second via hole. A plurality of first pole teeth are provided in an inner circumferential wall of the first pole piece and a plurality of second pole teeth are provided in an inner circumferential wall of the second pole piece. Magnetic powder is provided between a top surface of each of the first and second pole tooth and the outer circumferential surface of the rotary shaft.

Abstract: A piston ring which is resinous includes an annular main body portion having an inner peripheral surface and an outer peripheral surface facing each other and a pair of side surfaces interconnecting the inner peripheral surface and the outer peripheral surface and a joint portion 3 formed in the main body portion. The joint portion has a step shape when viewed from at least one of the pair of side surfaces and the outer peripheral surface. The outer peripheral surface has a tapered surface having an outer diameter increasing from a side of one side surface of the pair of side surfaces of the main body portion toward a side of the other side surface.

Abstract: Provided is a brush seal in which the leakage of a sealed fluid is small. The brush seal includes: a brush formed of a bunch of a plurality of bristles; and an annular back plate arranged at a low-pressure side of the brush and provided with a plurality of grooves into which a sealed fluid is to be introduced. In the brush seal, the plurality of grooves are inclined with respect to a circumferential direction of the back plate and with respect to an extending direction (B) of the brush.

Abstract: An arc-shaped stepped magnetic fluid sealing device comprises a casing, a sealing assembly and an end cover. The sealing assembly comprises a shaft, a permanent magnet, a first pole shoe and a second pole shoe. Inner walls of the first pole shoe and the second pole shoe are both arc-shaped faces inclined towards the side where the permanent magnet is located. A sealed cavity with a larger middle and two smaller ends is enclosed by the inner wall of the first pole shoe, an inner wall of the permanent magnet, and the inner wall of the second pole shoe. A portion of the shaft that is located inside the sealed cavity matches the sealed cavity in shape. Inner walls of the first pole shoe and the second pole shoe are respectively provided with first pole teeth and second pole teeth.

Abstract: A rotary seal comprises a seal element comprising a disc-shaped body having a first axial side and an opposed second axial side. The seal element further comprises a radially inner central circular opening for receiving a rotary shaft, the opening having an inner periphery for sealing engagement with the shaft. A radially outer rim portion of the seal element comprises an axially facing annular sealing surface provided on the first axial side for sealing engagement in use with an opposed axially facing sealing surface of an adjacent first static housing and an axially facing pocket provided on the second axial side and having an axially facing surface for receiving, in use, an annular elastomeric biasing element. At least one drainage passage is formed through the outer rim portion from an inlet on the second axial side to an outlet on a radially outer portion of the rim portion.

Abstract: An intershaft seal assembly for maintaining separation between a piston ring and a pair of mating rings is presented. The assembly includes a piston ring interposed between forward and aft mating rings and a plurality of hydrodynamic grooves disposed along a sealing face of each mating ring. Each hydrodynamic groove further includes at least two adjoining steps wherein each step is defined by a base wall arranged to decrease depthwise in the direction opposite to rotation of an inner shaft. Two adjoining base walls define a base shoulder which locally redirects potion of a longitudinal flow within the groove to form an outward flow in the direction of the piston ring. Base walls are bounded by and intersect a pair of side walls with at least one side shoulder thereon which narrows the groove widthwise and locally redirects portion of the longitudinal flow to form a lateral flow from one side wall toward another side wall.

Abstract: A sliding component includes a pair of sliding parts of which a rotating-side sliding part rotates in both forward and reverse directions. In the sliding component, at least one of the sliding parts has a sliding face provided with positive pressure generation grooves on the sealed fluid side, and a negative pressure generation groove on the opposite-to-sealed-fluid side and separated from the opposite-to-sealed-fluid side by a land, and a deep groove communicating with the sealed fluid side on the sealed fluid side of the negative pressure generation groove. The positive pressure generation grooves each have an upstream end communicating with the deep groove, and the negative pressure generation groove has an upstream inlet and a downstream outlet that communicate with the deep groove, and an intermediate portion between the inlet and the outlet located on the opposite-to-sealed-fluid side of the inlet and the outlet.

Abstract: A removable protection device is for a transmission seal providing tightness between a differential housing and a transmission shaft inserted therein during installation. The removable protection device includes a cylindrical, longitudinally slotted protection ring which is placed under the seal so as to protect same during the insertion of the shaft, a bearing flange for bearing on the housing, connected to the ring and having a radial opening following the slot of the ring, a removal handle attached to the bearing flange, and an abutment projecting axially towards the outside of the housing from the annular flange, so as to halt the insertion of the shaft in a reference position.

Abstract: An improved rotor or stator split ring seal assembly includes a flexible ring-advancing mechanism that advances at least one of the split ring halves radially inward, so that during assembly the split ring halves meet before adjacent elastomeric members, thereby preventing the elastomeric members from expanding between the seal ring halves and interfering with their alignment. The ring-advancing mechanism is flexed as the seal is assembled, thereby allowing the ring halves to be seated in the housing. The ring-advancing mechanism can be removable after assembly or internal to the seal. In various embodiments, the ring-advancing mechanism is a flexible bracket, a coil spring, or a vertical or horizontal leaf spring. Separate, identical ring-advancing mechanisms can be included with each of the housing halves so as to advance the split ring halves symmetrically.

Abstract: A shaft seal assembly comprises a stator configured to engage a housing and a rotor positioned within the stator. The stator may include a main body, a stator inward radial projection extending radially inward from the stator main body, and a collection groove adjacent the stator inward radial projection. The rotor may include a rotor main body and a rotor axial projection extending from the rotor main body. The rotor axial projection may be positioned adjacent a distal end of the stator inward radial projection.

Abstract: In one surface of a ring member, a plurality of incision grooves incised in a radial direction from an inner peripheral edge up to an appropriate position and those incised from an outer peripheral edge to an appropriate position are alternately formed, and in the other surface, incision grooves continuing from the inner peripheral edge up to the outer peripheral edge are formed. In order to adapt to the expansion and the contraction due to a temperature change and a change in shape and dimension due to abrasion, the inner incision grooves and the outer incision grooves increase/decrease in width, causing the packing to expand/contract in the circumferential direction, so that the packing is capable of maintaining its contact state with a shaft to minimize the leakage of the fluid.

Abstract: A seal arrangement for a process device or installation. A component arrangement has two components adjoining one another in sections in the area of a gap. A groove toward the gap is formed on one of the two components, which groove is L-shaped and is open toward an edge of the gap. A seal is inserted into the groove, which seal also has an L shape that corresponds to the L shape of the groove, for which purpose the seal has a first sealing limb and a second sealing limb at right angle thereto. The first sealing limb is designed so that the first sealing limb is inserted into the first limb of the groove, and the second sealing limb is designed in such a way that the second sealing limb can be inserted into the second limb of the groove and is firmly clamped there, and the first sealing limb is firmly clamped into the first limb of the groove in the manner of a sealing foot with oversize.