264results about How to "Extended seal life" patented technology

Methods and apparatus for providing enhanced seal life of a swivel seal assembly by decreasing the effective differential pressure across a given rotating seal. The differential pressure is decreased by providing a pressurized fluid on the low-pressure side of the seal at a predetermined fraction of the operating pressure of the swivel seal assembly. A preferred swivel seal assembly utilizes a washpipe and packing box that are rigidly affixed to their respective conduits such that misalignment and dynamic run-out is compensated for in the gap between the washpipe and the packing box. A control system monitors and regulates the pressurized fluid supplied to the assembly.

A hubcap breather assembly is provided for a hubcap housing lubricated wheel bearings in an automotive vehicle. The breather assembly includes a resilient, annular collar that fits into an access opening in a hubcap end wall, a filter cartridge cup, and a filter cartridge lid which fit together to hold a filter therebetween in a filter cartridge chamber. The filter is a hydrophobic, gas-permeable, particular matter filter that is disposed within and extends entirely across the filter cartridge chamber. Ambient air entering the hubcap through the hubcap breather assembly is filtered to exclude both particulate matter and water before entering the wheel bearing chamber. The filter is preferably formed of three layers, including an outboard porous layer of sintered polypropylene plastic, an intermediate hydrophobic layer of polytetrafluoroethylene, and an inboard porous layer of sintered polypropylene plastic. The filter can be replaced by separating the filter cartridge lid from the filter cartridge cup.

In a vacuum gate valve, a seal member for sealing a gate opening part is bonded to an outer edge part of a planar seal plate that is disposed in such a manner that the planar seal plate is opposed to a valve seat surface of the gate opening part and comes into contact with the valve seat surface. The seal member includes a vacuum seal part that is located on a side farther from the gate opening part and maintains the sealability of the gate opening part when the gate opening part is closed, and also includes a radical seal part that is located on a side closer to the gate opening part and that prevents the seal member from being affected by a treatment gas in the gate opening part when the gate opening part is closed. The vacuum seal part is made of a rubber elastic body, and the radical seal part is configured by providing a radical resistant body that is provided with an excellent radical resistance on the rubber elastic body.

The invention relates to a design of an air seal structure of an electric spindle used for a grease film. The air with a certain pressure enters in an annular cavity between a baffle plate 3 and a front small cover 6 through an air passage 8 arranged on a front bearing seat 7 and then reaches an annular groove through a radial slant hole, a clearance is formed between the inner circle of the baffle plate and the outer circle of a front screw cap 2, a sawtooth-shaped groove is designed on the front screw cap and corresponds to the other annular groove of the baffle plate, the pressure air forms pressure air sealing rings in the clearance and the two grooves along with the rotation of the rotating axle at high speed, and the pressure air sealing rings are used for preventing the cooling fluid and the foreign impurities from entering in the rotating axle; an O-shaped sealing ring is sealed at the sealing point among the baffle plate, a dust cap and the front bearing seat for ensuring the air tightness of running of the pressure air in the air passage; and the sawtooth shape of the front screw cap can prevent a small amount of cutting solution from infiltrating, the small amount of the cutting solution can be thrown into the other annular groove of the baffle plate along with the rotation of the front screw cap, and then is discharged outside the electric spindle through the baffle plate and a guide groove or guide hole for the dust cap, so that the reliable air tightness is provided for the high-precision running of a bearing 9.

The invention discloses a dynamic and static pressure mixing lubricating end face sealing structure which comprises a dual-end-face sealing structure, a single end face sealing structure and a seriesconnection sealing structure. The dual-end-face sealing structure feeds buffering gas to carry out zero leakage sealing on toxic and dangerous technological gas and comprises a static ring and a movable ring; the static ring has the axial degree of freedom and is provided with a lubricating gas passage, a lubricating gas pressure stabilization cavity, a porous medium friction pair and a high-precision displacement sensor and other structure; and the movable ring rotates along with a rotary shaft. Lubricating gas with adjustable pressure is fed to generate controllable gas static pressure; oneor more annular cavities penetrating through the circumferential direction are formed in the radial direction of the lubricating gas pressure stabilization cavity; the end face of the movable ring canbe a smooth end face, or a dynamic pressure groove structure is processed on the end face of the movable ring; and the groove type of the dynamic pressure groove has multiple manners including a traditional spiral groove, T-shaped groove or a novel rhombus groove structure. Under the extreme conditions including high temperature, high pressure, high rotating speed, ultralow temperature and the like, frequent start and halt and sealing of the mechanical shaft end of an impeller operating under variable working conditions can be realized.

A preload shock absorber assembly includes a shock absorber having a hydraulic cylinder. The cylinder includes a rod slideably supported by a cylinder head having a seal at one end of the hydraulic cylinder. A preload air chamber is arranged radially outwardly of the rod seal to provide a first spring having a first spring rate. The pressurized preload air chamber is separated from the rod seal to prevent loss of pressurized from the preload air chamber to the hydraulic cylinder. The pressurized air chamber uses a movable separator that seals the air chamber and isolates the air chamber from the outside environment. A second spring is supported by a seat secured to the hydraulic cylinder outer wall and is arranged between the seat and the separator. A third spring is arranged within the air chamber to supplement the spring rate provided by the pressurized air chamber.

An outer air seal assembly for use around rotating fluid guide components, such as rotating blades within a turbine engine, is disclosed. The seal includes features that reduce radially-directed leakage while increasing operational life of the seal and providing additional turbine section cooling without reducing engine performance. The seal employs boundary members that cooperatively prevent leakage within the turbine section of an associated gas turbine engine. The boundary members are spaced apart by interface gaps having radially-skewed portions that protect blocking panels disposed within the gap and extends the life of seal. The interface gap may also include a radially-aligned portion, and partition members may extend into the gap to form a flow-slowing serpentine-shaped pathway within the gap. Conduits disposed within the boundary members allow cooling fluid to enter the interface gap, providing supplemental cooling benefits without reducing engine operating efficiency. Multiple sets of boundary members may be used in an axially-extending orientation, with interface gaps being disposed between boundary members of each set.

A sealing system for a high pressure fuel cylinder has an inner seal and an outer seal sealing an insert into a boss of the cylinder. Permeation rates as a result of the differential pressures across the seals are balanced across both the inner and outer seals to maintain a constant pressure in an intermediate space between the seals. Permeation is balanced by selecting suitable seal materials or by seal geometry or by providing a pressure relief device to the intermediate space to release excess pressure built up in the intermediate space beyond a desired intermediate pressure. Maintaining the intermediate pressure lower than the cylinder pressure and higher than atmospheric pressure results in lower pressure differentials across the seals, extending the seal life. A pressure switch or gauge is provided to monitor the pressure in the intermediate space. Changes in the pressure are indicative of a leak in one or both of the seals.

A self aligning bearing and seal assembly including a bearing housing operable to mount to a surface, a bearing unit seated within the bearing housing and having an outer race, an inner race, and at least one ball intermediate the outer and inner race. The self aligning bearing and seal assembly also includes a pivot assembly having a shaft sleeve operable for receiving and maintaining a rotatable shaft and being disposed in the bearing housing and in operational contact with the inner race of the bearing unit. The pivot assembly allows for a degree of angular misalignment between the surface and the shaft greater than three degrees.

A top drive system for wellbore operations, the top drive system, in at least certain aspects, including a motor, a main shaft driven by the motor, the main shaft having a top end and a bottom end, a speed reduction system interconnected with the main shaft, a washpipe shaft interconnected with the speed reduction system for driving the washpipe shaft at a speed of rotation less than a speed of rotation of the main shaft. This abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure and is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims, 37 C.P.R. 1.72(b).

An apparatus and a method for expanding a downhole tubular. The apparatus includes a mandrel defining at least one curved support surface. The apparatus further includes an expansion member defining a curved bearing surface for contact with the support surface and corresponding to the mandrel support surface. The expansion member is movable relative to the mandrel, whereby the surfaces are in contact and movable over one another to move the expansion member from a smaller diameter first configuration towards a larger diameter second configuration.

A dynamic seal advantageously utilizes a groove on the active side or surface of the seal to capture a leaked lubricant and hydrodynamically pump the lubricant back into the lubricated side of the seal. The groove stops short of the leading edge of the seal that faces the lubricant side thereby forming a static dam between the termination point of the groove and the seal edge. When the fluid pressure within the groove adjacent the static dam exceeds the opening pressure for the seal lip, the lubricant within the groove is pumped back into the lubricant side of the seal. The groove can have an induction zone wherein the fluid pressure rise is gradual and a booster zone wherein the fluid pressure rise is relatively faster than in the induction zone. The booster zone is disposed adjacent the static dam.

Mechanical face seal rings having a metallurgically bonded wear-resistant coating on the wear surfaces thereof and methods for forming such coated components is taught herein. The face seal rings, which can be formed of a relatively inexpensive base metal or alloy, have a hard metal alloy slurry disposed on the wear surfaces and then fused to form a metallurgical bond with the iron-based alloy. The wear-resistant coating comprises a fused, metal alloy comprising at least 60% iron, cobalt, nickel, or alloys thereof.

A valve for the gastight interruption of a flow path is disclosed. A valve housing includes a first opening and a valve seat. A valve disk includes an inner disk portion, which is linearly movable relative to an outer disk portion so that, in a closed setting, a pressure differential acts substantially upon the movable inner disk portion, which is supported on the valve housing. The valve seat has a radially inward pointing first inner face and the outer disk portion has a radially outward pointing first outer face, wherein in the closed setting there exists a radial sealing contact with the first inner face. The outer disk portion has a radially inward pointing second inner face and the inner disk portion has a radially outward pointing second outer face, having a radially sealing contact with the second inner face.

A fuel supply system for a vehicle uses a multi-piston LPG injunction pump which pumps fluid from a storage tank to an engine. The multi-piston pump uses the vehicle's pneumatic air system, wherein the pressurized air of this system alternatingly drives at least two pistons of the piston pump. Each piston moves through a pumping stroke and a return stroke wherein one piston moves through a pumping stroke, while the opposite piston moves through a return stroke. The pump includes barrier fluid chambers surrounding each of the pistons wherein during a pumping stroke of one piston, a first barrier fluid chamber associated with the one piston decreases in volume as the piston displaces through its pumping stroke. This reduction in volume of the barrier chamber drives the barrier fluid out of the first barrier fluid chamber into a second barrier fluid chamber associated with the second piston. By driving the barrier fluid into this second chamber, this pressurizes the second chamber and effects the displacing movement of the second piston through its return stroke as the barrier fluid chamber increases in volume through the movement of the second piston.

The invention belongs to the field of oil drilling, and in particular relates to a comprehensive experimental facility for breaking rocks with steel particle jet impact. The comprehensive experimental facility comprises a water storage tank, a high-pressure pump, a high-pressure pipeline, a pressure gauge, high-pressure sphere tanks, an auger conveying device, a high-pressure valve, a test stand, a high-pressure experimental wellbore, rocks, a mortar pump, an injection type funnel, a hydraulic power unit, a hydraulic pipeline, a mass flow meter and a high-pressure diverting valve etc., wherein the auger conveying device can control the particle concentration of high-pressure water flow, the mass flow meter can be used for measuring and judging whether injection of steel particles is completed or not, the confining pressure of steel particle jet rock breaking can be regulated by a pressure regulating nozzle, and the two high-pressure sphere tanks work alternatively so that steel particles can be injected uninterruptedly into the high-pressure pipeline. The particles are delivered along with liquid, and the system drive is achieved by a hydraulic motor. The comprehensive experimental facility can be used for carrying out experimental analysis of the effect law of various parameters such as hydraulic power, lithological characters and jet on rock breaking efficiency, which provides theoretical guidance and equipment support for popularization and application of the technology of particle impact drilling.