35 results about "Stroke ratio" patented technology

A high-pressure gas compressor comprises a single-acting cam driven piston with a pressure compensation chamber disposed between the piston and the cam. A roller tappet assembly transmits reciprocating motion from the cam to the piston. A pressurized gas directed to the pressure compensation chamber offsets forces acting on the piston from the compression chamber gas pressure, thereby reducing Hertzian pressure between the tappet roller and the cam. Overall efficiency and durability can be improved by reducing friction between compressor components, for example by employing thin film coatings to reduce friction, pressurized oil lubrication systems and higher cylinder bore diameter to piston stroke ratios. The service life of gas seals and compression efficiency can be improved by thermal management strategies, including liquid-cooled compressor cylinder liners and intercoolers between compression stages. Employing a poppet-style intake valve and reducing parasitic volume in the compression chamber can improve compressor volumetric efficiency.

Provided is a digital flow-distribution constant-flow radial plunger pump. The digital flow-distribution constant-flow radial plunger pump comprises plunger chambers arranged in a pump body, two-position three-way high-speed switching valves connected with an oil tank and a load, an absolute value angle encoder connected with crank shafts of the plunger chambers, a flow-distribution body and a controller, wherein the two-position three-way high-speed switching valves are connected with the plunger chambers through the flow-distribution body, the controller is connected with the absolute value angle encoder and the two-position three-way high-speed switching valves, the controller receives a corner signal measured through the absolute value angle encoder, a PWM signal and a stroke control signal are output to the two-position three-way high-speed switching valves through a duty ratio control algorithm and a stroke ratio control algorithm, and therefore constant flow of the pump is achieved. According to the digital flow-distribution constant-flow radial plunger pump, the valves are controlled through the duty ratio and the stroke ratio, pulsation of the output flow of a hydraulic pump is reduced, pump vibration is relieved, long-time running of the pump is facilitated, random rotating speed working condition can be adapted, and constant-flow output is achieved.

Disclosed is lubrication for a slow-running two-stroke engine, especially marine diesel engines. The lubrication uses Swirl Injection Principle by locating the lubricant injectors closer to the TDC than ⅕ of the full stroke of the piston, which is closer than in typical marine diesel engines. This can be achieved by reconstructing cylinder liners or by adding new mounting holes to the cylinder. In case that such reconstruction is not possible, an improvement of SIP principles can also be achieved by directing the spray towards the TDC or to a location on the cylinder liner closer to the TDC as compared to the location of the SIP valves, for example under an angle of more than 30 degrees or even more than 60 degrees when measured from a plane normal to the cylinder axis.

A method of stepping on a curved bridge. Multiple sets of jacking units are arranged on the inner and outer sides of the pier, and the jacking units are located on the equidistant circular curves on both sides of the bridge centerline, namely the outer jacking trajectory line and the inner jacking trajectory line. It is arranged in the center along the tangential direction; an electro-hydraulic proportional speed control valve is set on the oil inlet oil circuit of the jack of the jacking unit. The cylinder can be extended at a speed with the same stroke ratio; during the jacking process, the photoelectric sensor detects the deviation of the main beam in real time. Whether correction is required; correction is performed when the correction jack exceeds the standard. The advantage is that it can automatically follow the curve trajectory without stopping the adjustment, and at the same time, it can rectify the deviation dynamically in real time.

The invention discloses a motor with low rotary speed and large torque, which comprises a crank connecting rod assembly, a cylinder block, a piston, a piston pin, a piston ring assemblage, a cylinder head, an exhaust valve, an inlet valve, an air inlet pipe and a carburetor, wherein the piston is fixed on the crank connecting rod assembly via the piston pin, the piston is arranged in the cylinder block, the exhaust value and the inlet valve are arranged in the duct of the exhaust value and the inlet valve of the cylinder head, the cylinder head is arranged on the cylinder block, the air inlet pipe is arranged on one side of the intake of the cylinder head, the carburetor is arranged on the air inlet pipe, the eccentricity of the crank connecting rod assembly is from 28.90mm to 31.10mm, and the diameter of the piston is from 54.5mm to 57mm, and the diameter of the cylinder / the stroke ratio is from 0.88 to 0.98. The motor is suitable for motor bicycles, motor tricycles, sand bank cars and carting cars, which has the advantages of outputting larger torque at the low speed, reducing the rotary speed at the maximum torque point, improving the initial starting acceleration property and the transcending accelerating ability, reducing heat load, oil consumption and oscillation, and increasing the durability.

The invention discloses a stroke equal-ratio transmission hydraulic circuit, which can be applied to hydraulic crushing equipment, hydraulic rock drilling and other equipment. It is mainly composed of a power piston, a stroke proportional control piston group, a stroke signal feedback control valve, a reversing valve, and an oil filling valve. The rod, the large piston, the cavity and the oil seal group of the stroke equal ratio control piston group form a closed cavity, and the cavity is filled with hydraulic oil. The reciprocating motion of the power piston controls the piston group through the proportional stroke, and transmits the stroke position signal proportionally to the stroke signal feedback control valve; the reversing valve is controlled by the stroke signal feedback control valve to control the reciprocating motion of the power piston. The invention can make the power piston and the stroke signal feedback control valve unnecessary to be arranged on the same axis, and can effectively reduce the operating speed of the spool of the stroke signal feedback control valve and reduce the internal impact.

The present invention aims to design a linkage type double-adjustment door mechanism for a smoke exhaust cabinet, including: a smoke exhaust cabinet, a pulley mechanism, several steel cables, a counterweight box, an up and down adjustment door and guide rails. The two sides of the upper and lower adjustment doors are connected to a counterweight box through their own steel cables through the pulley mechanism, so that the upper and lower adjustment doors can produce a double-door linkage movement effect with a stroke ratio of 1:2, and can achieve positioning at the same time.

The invention relates to a variable-stroke ratio-regulated reciprocating pump and mainly solves the problem that the liquid flow of the traditional injection pump cannot be regulated. The ratio-regulated reciprocating pump is characterized in that a pump body (1) is provided with more than two plungers (2) which are in parallel and independent from each other, a plunger clutch mechanism for ensuring that a cross spider (3) is clutched with the plunger (2) when the plunger (2) absorbs the liquid is arranged at one end of the plunger (2), the cross spider (3) is connected with a crankshaft through a connected rod and a plunger travel limiting mechanism for limiting the liquid absorbing stroke is arranged at the other end of the plunger (2). The variable-stroke ratio-regulated reciprocating pump has the characteristic that the liquid flow can be adjusted.

The present disclosure may allow a movable base driven in a dual-motion manner and a second movable contact to be connected together by a plurality of rods, and the force transmitted to the movable base may be when the plurality of rods are in close contact with each other or are released from close contact. to the second movable contact, and thus may not require an increase in the size of the rod even when the stroke ratio between the movable base and the second movable contact is increased, thereby having It is possible to minimize the size of the gas circuit breaker and to appropriately control the stroke ratio between the movable base and the second movable contact.