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201results about How to "Big lift" patented technology

Section-variable tunnel-crossing lining trolley

The invention provides a section-variable tunnel-crossing lining trolley which comprises a portal system, a template system, a connecting part and a walking mechanism, wherein the portal system comprises a frame part, a jacking mechanism and a bracket part; the jacking mechanism comprises multiple sets of jacking single pieces; each of the jacking single pieces comprises a multi-level jacking part; the bracket part comprises a truss girder and an adjusting support frame for a walking mechanism; the template system comprises a top template, a left template and a right template; and the connecting part comprises a support jack and a hydraulic cylinder. The section-variable tunnel-crossing lining trolley provided by the invention has the effects that the whole structure is simple; the assembling is convenient; the jacking mechanism is in a multi-level jacking mode; the trolley not only can adapt to the construction for the tunnel sections in different heights but also can achieve higher lifting volume; the trolley can meet the requirement of constructing multiple parallel tunnels by one trolley in the manner of constructing the working tunnel; due to the design of the bracket part, the lining trolley can meet the stability requirement, and meanwhile, the structure is simplified and the whole trolley can be supported.
Owner:HUNAN WUXIN TUNNEL INTELLIGENT EQUIP CO LTD +1

Lateral impact testing device for target object and testing method thereof

The invention discloses a target object lateral impact test device, which comprises a frame, an impact hammer, an impact hammer height measuring part, an impact hammer height adjusting part, an impact hammer speed measuring part, a secondary impact preventing part and a display screen; the impact hammer The height measuring part is composed of a displacement sensor arranged on the frame; the height adjustment part of the impact hammer includes a telescopic connecting rod and an electric push rod, and the rear end of the impact hammer is fixed on the other end of the telescopic connecting rod; There is an electromagnetic relay, one end of the electric push rod is hinged to the frame, and the other end is connected to the electromagnetic relay; the impact hammer speed measurement components include a photoelectric door and a light baffle, the photoelectric door is set on a lifting rod, and the light baffle is fixed on the impact hammer; Secondary impact prevention components include rotating shafts, brake discs, brake calipers, brake lines and controllers. The invention can provide relatively large impulse, can effectively avoid secondary impact, is convenient to use, and has low cost, and can be used for lateral impact tests of various targets.
Owner:TIANJIN UNIV

Device for adjusting lift of intake valve of supercharged engine

The invention relates to the technical field of an internal combustion engine, in particular to a device for adjusting a lift of an intake valve of a supercharged engine. The device comprises an intake channel, an exhaust channel, a lower intake valve section, an exhaust valve, an upper intake valve section, a volumetric cavity, a moving body, a penetrating tube, a moving block, a connecting tube and a spring, wherein the moving body is arranged in the volumetric cavity and is contacted with the inner wall surface of the volumetric cavity in a sealing way, the penetrating tube is arranged in a way of penetrating the upper wall surface and the lower wall surface of the moving body, the moving block is arranged in the penetrating tube and is contacted with the inner wall surface of the penetrating tube in a sealing way, a plane is adopted by the lower end face of the moving block, a slope is adopted by the upper end face of the moving block, two ends of the connecting tube are respectively communicated with the left wall surfaces of an intake tube and the volumetric cavity, and the right wall surface of the moving body is connected with the right wall surface of the volumetric cavity through the spring. When the pressure in an exhaust tube of the engine is relatively high, the moving body can move rightwards, and the lift of the intake valve can be increased; and when the pressure in the exhaust tube of the engine is relatively low, the moving body can move leftwards, and the lift of the intake valve can be decreased. The device has the advantages of reasonable design and simple structure and is suitable for a variable valve lift system of the supercharged engine.
Owner:SHANGHAI JIAO TONG UNIV

Centrifugal separator having an intermittent discharge system

A centrifugal separator for separation of at least two components of a fluid mixture which are of different densities includes a frame, a hollow spindle rotatably supported by the frame, a centrifuge rotor mounted to a first end of the hollow spindle to rotate together with the spindle around an axis of rotation, wherein the centrifuge rotor includes a rotor casing enclosing a separation space in which a stack of separation discs is arranged, a duct arranged to be through-flown by process medium during operation of the centrifugal separator and extending through the hollow spindle and in fluid contact with said separation space, at least one liquid outlet for discharging a separated liquid phase from the separation space, and a plurality of peripheral ports extending from the separation space through the rotor casing to a surrounding space for discharging a phase from the periphery of the separation space. The centrifuge rotor includes a sliding bowl bottom movable between a closed position, in which the peripheral ports are closed, and an open position, in which the peripheral ports are open, an inlet channel for supplying hydraulic fluid to a closing chamber between the sliding bowl bottom and the rotor casing in order to hold the sliding bowl bottom in the closed position. The centrifugal separator further includes at least one hermetic seal at a second end, other than the first end, of the hollow spindle and the inlet channel for supplying hydraulic fluid to the closing chamber extends through the hollow spindle and is further arranged such that the hydraulic fluid is in thermal contact with the at least one hermetic seal when the hydraulic fluid is being supplied to the closing chamber.
Owner:ALFA LAVAL CORP AB

Air intake valve lift-variable system in air intake pressure regulating type

The invention discloses an air intake valve lift-variable system in an air intake pressure regulating type, belonging to the technical field of internal combustion engines. The system comprises an air intake channel, an air exhaust channel, an air intake valve lower section, an air exhaust valve, an air intake valve upper section, a capacity cavity, a movable body, a perforation pipe, a movable block, an air inlet pipe, a connecting pipe and a spring, wherein the movable body is mounted in the capacity cavity and is contacted with the inner wall face of the capacity cavity in a sealing manner; the perforation pipe perforates the upper wall face and the lower wall face of the movable body; the movable block is mounted in the perforation pipe and is contacted with the inner wall face of the perforation pipe in a sealing manner; the lower end face of the movable block is a plane; the upper end face of the movable block is an inclined face; two ends of the connecting pipe are communicated with the left wall faces of the air intake pipe and the capacity cavity; the right wall face of the movable body is connected with the right wall face of the capacity cavity through the spring; when pressure in the air intake pipe is relatively large, the movable body is moved to right; the air intake valve lift is increased; when the pressure in the air intake pipe is relatively small, the movable body is moved to left; the air intake valve lift is reduced; and the intake valve variable-lift system is characterized by reasonable design and simple structure and is suitable for engine valve lift-variable systems.
Owner:SHANGHAI JIAO TONG UNIV
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