The invention relates to a sealing assembly (1) for sealing a piston rod (2) of a piston compressor, which piston rod extends in an axial direction (A) and can be moved back and forth in the axial direction (A). Said sealing assembly (1) comprises at least one packing chamber (4), wherein the packing chamber (4) is bounded in the axial direction (A) by a first and a second side wall (5, 6), wherein at least one sealing ring (7) or one scraping ring (8) and a spring device (9) are arranged in the packing chamber (4), and wherein a spring device (9) and at least one sealing ring (7) or one scraping ring (8) are arranged one after the other in the axial direction (A) proceeding from the first side wall (5), wherein the sealing ring (7) or the scraping ring (8) lies against the second side wall (6), and wherein the spring device (9) is designed as a magnetic spring and consists of two assemblies (9a, 9b) spaced apart in the axial direction (A), a first assembly (9a) and a second assembly (9b), wherein each assembly (9a, 9b) comprises at least one magnet (10a, 10b), and wherein the magnets (10a, 10b) are arranged in the two assemblies (9a, 9b) in a mutually matched manner in such a way that the two assemblies (9a, 9b) repel each other.

A contacting face seal component comprises a circumferential body defined as an annulus extending between an outer periphery and an inner periphery around a center axis, the circumferential body including a contact surface configured for face-sealing engagement with a relatively rotating member, an annular groove defined in the contact surface about the center axis, the annular groove defining in the contact face a sealing lip and at least one load distribution pad radially spaced from one another by the annular groove; and at least one passage extending between the annular groove and the outer periphery to fluidly connect with an outer side of the circumferential body.

A magnetic seal system adapted for use within a support structure mounted around a rotatable shaft. The magnetic seal system includes two annular seal assemblies configured to be surrounding the shaft to rotate therewith and be axially displaceable along the shaft. Each annular seal assembly includes an annular member adjacent to an annular seal. The magnetic seal system also includes an annular magnet configured to be sealingly connected to the support structure and surrounding the shaft The magnet being disposed between the two annular seals in a non-contacting relationship with the shaft and biasing the two annular members along the shaft towards the magnet, wherein adjacent contacting surfaces between each of the two annular seals and the magnet biasingly mate to form sealing interfaces.

Embodiments include an apparatus and techniques for operating an electromagnetic cartridge seal. Embodiments include operating a cartridge seal in one of a plurality of modes, and receiving a signal at a force applying mechanism of the cartridge seal, the force applying mechanism being coupled to a primary sealing component of the cartridge seal. Embodiments also include controlling the force applying mechanism based at least in part on the received signal.

A bearing protector includes a static component fixed relative to a housing, in which a stationary sealing face profile is retained and a rotational component for fixing relative to a shaft with the static and rotational components held axially relative to each other. The rotational component has an annular sealing face profile energized by way of one or more magnetic elements retained within the static component to generate a positive sealing face contact between the stationary sealing face and rotational sealing face profiles. The magnets elements are held within recesses in the static component and extend radially inwards of the recesses.

A deep groove ball bearing with a rotor is disclosed by the present invention. The deep groove ball bearing with a rotor comprises a mandrel, at least one bearing assembly structure mounted on the periphery of the mandrel, and a magnet structure; wherein the bearing assembly structure, along with the mandrel to constitute the deep groove ball bearing structure, includes an outer ring sleeved on the periphery of the mandrel, steel balls, and an inner sealing cover; wherein the periphery of the mandrel is provided with at least one lap of channel that matches with a groove provided on the inner surface of the outer ring, and the steel balls are installed between the channel and the groove; wherein an inner sealing cover is axially embedded in a sealing groove of the out ring for sealing an inner side of the outer ring; wherein the magnet structure includes a permanent magnet glued on the periphery of the mandrel, a reinforcing sleeve sleeved outside the permanent magnet, and a balance ring provided at one end of the permanent magnet.

A gas turbine engine may include a liftoff carbon seal assembly. Liftoff carbon seal assembly may include a static seal support structure, a magnetic carrier spring assembly coupled to the static seal support structure, a nonferrous metal slab magnetically associated with the magnetic carrier spring assembly and coupled to the static seal support structure. In various embodiments, a combination of the magnetic carrier spring assembly and the nonferrous metal slab create a counter-force using an eddy current to oppose a motion of the magnetic carrier spring assembly.

The rotary face seal with magnet loading replaces known spring mechanisms with magnetic technology that provides a consistent load with minimal variation, which is not affected by natural frequency and material fatigue due to cyclic loading. This improves seal performance and service life. The tubular magnetic ring is advantageous because it replaces existing seals within stationary cartridge with a puller type magnetic assembly design that results with the stationary cartridges being an exact exchange. The use of magnetic technology attached to the seal case, which is attached to the shaft, does not produce eddy currents because it is of a single pole configuration. The single pole magnetic assembly design is achieved by either axial or radial magnet orientation, such as in the form of a tubular magnetic band located in a circumferential notch in the seal case.

A method and system for actively controlling an axial separation between a seal face of a stationary ring and a seal face of a rotating ring of a gas seal is disclosed. At least one property is sensed indicative of a condition of at least one of the seal faces. With at least one sensing device, a characteristic of the axial separation between the seal faces is sensed. A net magnetic force of at least one magnetic device is adjusted based on the property and/or the characteristic. Adjusting the net magnetic force adjusts the axial separation between the seal faces. Without using a buffer gas between the seal faces, flow of gas or other fluid is controlled between the seal faces by adjusting the axial separation.

A mechanical seal assembly with an electronically controllable carrier load. The assembly includes a magnetic ring affixed to the carrier and driven by a solenoid. The solenoid can apply an axial force to the carrier. The carrier load can be controlled to prevent or reduce friction between the primary ring and mating ring in slow-roll running conditions by partially or completely compensating a spring force provided by a biasing mechanism. The carrier load can further be controlled to inhibit seal hang-up. In embodiments, desired the carrier load can be determined by rotational speed. In embodiments, carrier load can be determined based on sensor signals.