64results about How to "Avoid Dry Grinding" patented technology

The invention discloses a self-sealed zero leakage hydrophobic molded surface mechanical sealing end face structure, which comprises a dynamic ring and a static ring which are mechanically sealed, wherein at least one sealed end face of the dynamic ring or the static ring is a composite molded surface consisting of a microgroove dynamic pressure ring belt, a sealed dam and a hydrophobic molded surface distributed in turn from high to low direction. The structure has the advantages that: the self-sealing property of the narrow hydrophobic molded surface can obviously reduce the leakage and even reaches zero leakage; by adopting one or more hydrophobic molded surfaces, the abrasion of the end faces can be reduced or avoided, and the integral sealing property and the abrasion resistance of mechanical seal can be greatly improved; and by adopting the combination mode of the microgroove dynamic pressure ring belt and the hydrophobic molded surface, a lubricating medium can be stored in the end faces to prevent dry grinding of the end faces when the machine is started and improve the opening property and the reliability of mechanical seal.

The invention discloses a mechanical sealing structure with flower and plant simulating fluid type groove end surfaces. The mechanical sealing structure comprises a mechanical sealing movable ring and a mechanical sealing stationary ring; one sides of the end surfaces of the movable ring and the stationary ring are high-pressure sides, i.e. advanced positions; the other sides of the end surfaces of the movable ring and the stationary ring are low-pressure sides, i.e. backward positions; the backward positions of the end surfaces are provided with circular sealing dams with smooth flat surfaces; the mechanical sealing structure is characterized in that a plurality of fluid type grooves, which are uniformly distributed along the circumference direction, are formed by drainage grooves, left profiled grooves and right profiled grooves centering around the drainage grooves and take the shape of flowers and plants in appearance, are arranged on at least one of the end surfaces of the movable ring and the stationary ring, the drainage grooves are radial grooves; the fluid type grooves are distributed on an annular belt in accordance with the centers of the end surfaces, the circular belt is arranged at the advanced positions of the end surfaces; and no slotting regions between the flower and plant simulating fluid type grooves form a sealing weir. The mechanical sealing structure has better fluid guiding effect; the pressures of the root regions of the fluid type grooves are higher and more uniformly distributed; and the bearing capacity of a seal and the rigidity of a fluid membrane are increased.

Disclosed is a streamline groove end face mechanical sealing structure imitating a creased appearance of the surface of sharkskin. The streamline groove end face mechanical sealing structure comprises two mechanical sealing rings, namely a moving ring and a static ring, plural groups of streamline grooves imitating the creased appearance of the surface of the sharkskin and arranged along the peripheral direction are arranged at least one end face of the sealing rings of the moving ring and the static ring. Each biomimetic groove comprises a left circular groove and a right circular groove, a convex platform along the pressure drop direction in the groove and transitional parts between two sides of the convex platform and an outer contour line of the groove, so that the streamline grooves, namely sharkskin imitation streamline grooves, with the appearance imitating the creased surface of the sharkskin are formed. The sharkskin imitation streamline grooves are arranged on a high pressure side of an end face medium, namely an upper stream. The whole outlines of the sharkskin imitation streamline grooves are in a contracting shape along the pressure drop direction. The sharkskin imitation streamline grooves are arranged to form a groove annular belt along the circumference of the end face, and a plane annular belt area without grooves on the outer end face other than the groove annular belt is a sealing dam.

The invention relates to a hydraulic closed type flushing loop and belongs to the technical field of hydraulic equipment. The hydraulic closed type flushing loop comprises a hydraulic oil pump, a hydraulic motor, a hot oil shuttle valve and a speed adjustment valve. An opening A of the hydraulic oil pump communicates with an opening A of the hydraulic motor and a first oil inlet A of the hot oil shuttle valve. An opening B of the hydraulic oil pump communicates with an opening B of the hydraulic motor and a second oil inlet B of the hot oil shuttle valve. An oil outlet T of the hot oil shuttlevalve communicates with an oil inlet P of the speed adjustment valve. An oil outlet T of the speed adjustment valve communicates with a first oil drainage opening of the hydraulic motor. A second oildrainage opening of the hydraulic motor communicates with a hydraulic oil tank. After a closed type system is started, the nominal flushing flow can be generated no matter whether people operate thesystem or not; when the hydraulic motor is at the high position, part of hydraulic oil enters a shell of the hydraulic motor after start, and dry rubbing is avoided; the defect that heating cannot beconducted after start can be avoided; the flushing flow is forced to be constant through the speed adjustment valve; and the problem that the flushing flow is excessively large when a high-pressure oil opening A and a high-pressure oil opening B are switched rapidly can be avoided.

The invention relates to a shaft seal of oil seal machinery. The shaft seal comprises a crankshaft, a front bearing seat, a movable friction ring component and a fixed friction ring component, wherein the middle of the front bearing seat is a cavity; the crankshaft which is internally provide with an oil path is arranged in the cavity of the front bearing seat in an insertion manner through a bearing; an oil baffle is arranged at the right end face of the bearing; the inner radial surface of the oil baffle is stuck with the crankshaft; the movable friction ring component is arranged at the right end of the oil baffle; the fixed friction ring component is arranged at the right end of the movable friction ring component; the oil baffle and the fixed friction ring component form an annular oil pond in the cavity inside the front bearing seat; an oil outlet of the oil path is formed at the sidewall of the crankshaft; oil discharged by the oil outlet enters into the oil pond; steps which protrude inwards is arranged at the inner wall of the cavity of the front bearing seat; the outer diameter surface of the oil baffle is stuck with the step surface; and at least two through holes for discharging oil are arranged at the steps at the upper part. The shaft seal of the oil seal machinery has long service life, low cost and no leakage.

The invention discloses an energy protection method, device and equipment for an AMT clutch and a storage medium. The method comprises the steps that the current temperature and the current sliding friction power limit value of the AMT clutch are obtained; the current temperature is compared with a preset temperature threshold value to obtain a temperature comparison result, and the current sliding friction power limit value is compared with a preset sliding friction threshold value to obtain a sliding friction power comparison result; and a current energy protection working condition is obtained, AMT clutch energy protection is conducted according to the current energy protection working condition, the temperature comparison result and the sliding friction power comparison result, different coping strategies can be adopted for different working conditions, dry wear during friction plate sliding is avoided, the friction heating burden of the clutch is relieved, the wear rate of the clutch is reduced, the safety of the clutch is ensured, and the service life of the clutch is prolonged.