4 results about "Steel piston" patented technology

This invention relates to the field of seismic isolation bearing technology, specifically a horizontal seismic isolation bearing based on air springs, comprising a lower connecting steel plate, an upper connecting steel plate, a lead-core rubber bearing element, a supporting sliding element, a sector-shaped air spring, and a dust cover. The lead-core rubber bearing element is fixedly connected to the upper part of the supporting sliding element, and the supporting sliding element and the lower connecting steel plate are connected through sliding contact, forming a sliding friction pair. Multiple sector-shaped air springs are arranged circumferentially around the supporting sliding element, and the outer sides of the sector-shaped air springs are connected to steel limiting rings fixed to the lower connecting steel plate. The sector-shaped air springs are internally equipped with limiting devices and buffer rubber to prevent excessive displacement and compression damage. A dust cover is installed on the upper part of the steel piston rod of the sector-shaped air spring. The bearing of this invention can automatically adjust its working state according to the earthquake intensity, primarily using sliding and air springs during minor earthquakes, and activating the lead-core rubber for energy dissipation during major earthquakes, achieving intelligent graded seismic isolation.

A hot forging steel piston skirt trimming-punching-finishing three-in-one device and processing method for inhibiting hot deformation belong to the technical field of mechanical processing, and are directed to trimming punching production process control of hot forging steel piston skirt forgings with flash or needing punching or both. The four process controls of holding, trimming, punching and finishing of the hot forging steel piston skirt are realized through mutual cooperation of three high-temperature-resistant die springs, and the precision of the piston skirt is greatly improved. The trimming device is simple in structure and safe, can be classified according to different specifications of different cylinder diameter piston skirts, and can meet the high-precision trimming requirements of all hot forging steel piston skirts. The present application innovatively proposes the technical scheme of "three sets of customized rectangular springs cooperative control + synchronous composite process", and for the first time realizes "one clamping and three processes completed simultaneously" of the hot forging steel piston skirt, solves the hot deformation and efficiency bottleneck from the aspects of process principle and structure design, and has remarkable creativity and practicality.

This invention discloses a perforated turbulence-type internal cooling oil cavity structure and a steel piston for a high-strength diesel engine. It utilizes a perforated plate-type turbulence-type crown internal cooling oil cavity (3) with circumferentially arranged perforated plate-type turbulence-type components (4) on its outer wall. Flow holes (5) are uniformly opened on the perforated plate-type turbulence-type components (4). The perforated plate-type turbulence-type components (4), in conjunction with the flow holes (5), organize the oscillating oil flow, enhancing near-wall heat transfer and suppressing stagnant dead zones. Simultaneously, the flow holes (5) reduce weight, achieving a combination of improved heat transfer and lightweight design. The included angle of the perforated plate-type turbulence-type components (4) is 90°–150°, and it is at the same height as the first annular groove, directionally scouring the top surface and inner high-heat wall surface of the oil cavity. The minimum wall thickness between the oil cavity and the top, inner cavity, and inner annular surface of the first annular groove is ≥1.5 mm, ensuring strength and fatigue life. The structure can be manufactured by split forging, and the assembly of the turbulence components and the encapsulation of the internal cooling oil cavity are achieved through two laser welding processes. This significantly improves the heat transfer area and heat transfer coefficient, reduces the peak temperature and thermal stress, and achieves weight reduction.

This application discloses an all-steel piston, including a piston body, a piston pin bore, and an internal oil cavity. The inner wall of the piston pin bore is provided with two symmetrically distributed crescent-shaped structures and two groove structures; the groove structures communicate with the crescent-shaped structures. The piston body has at least two through holes, which connect the internal oil cavity with the inner cavity of the piston body, and the through holes are symmetrically arranged in the inner cavity of the piston body. By providing a combination structure of through holes, crescents, and grooves in the existing piston structure, the cooling lubricating oil in the oil cavity can be better guided to flow into the connecting rod and piston pin, providing lubrication for the contact between the piston pin bore and the connecting rod and piston pin, effectively reducing the risk of seizure. This solution takes into account both lightweight design and manufacturing quality, while reducing the risk of piston failure in the engine.