37results about How to "Avoid high speed crashes" patented technology

The invention relates to a piston ring of a laser micro-modeling engine and a manufacturing method, in particular to carrying out laser micro-modeling on the upper end surface and the lower end surface of the piston ring; a metallographical organization which has the hardness of HV800-900, is distributed uniformly, consists of micro-pits and is a micro-geometrical structure is obtained after the upper end surface and the lower end surface of the piston ring of the engine are processed by the laser micro-modeling, wherein, the geometric parameters of the micro-geometrical structure are that the radius of the pit is that rp is equal to 20 to 50Mum, the depth of the pit is that hp is equal to 2 to 8Mum, the area occupancy of the pit is that Sp is equal to 5 percent to 15 percent and the distance of the pit is that L is equal to 90 to 230Mum. The invention has the advantages that after the upper end surface and the lower end surface of the piston ring are processed by the laser micro-modeling, the metallographical organization occurs changing, the hardness is improved and the wearing resistance is enhanced; the micro-pits of the upper end surface and the lower end surface of the piston ring store lubricant and wearing particles, improves lubrication and reduces the wearing; the extrusion effect of a lubricating oil film of the pit reduces the break of the piston ring.

The invention discloses a gas-liquid pressurization cylinder. The gas-liquid pressurization cylinder is formed by the fact that a gas pressure cylinder body and a hydraulic cylinder body are in series connection through a middle cover with a middle hole and are separated into a pressurization gas cavity, a pre-pressing gas cavity, a pre-pressing oil storage cavity, a pressurization oil cavity and a stroke returning gas cavity through an upper end cover with a gas guide pipe, a pressurization piston with a hollow pressurization rod, a gas separation piston, the middle cover with the hole, a working piston and a lower end cover. The pressurization gas cavity, the pre-pressing gas cavity and the stroke returning gas cavity are respectively communicated with an exterior gas circuit through respective connectors, and the working processes of the pre-pressing stroke, the pressurization stroke and the reset stroke can be achieved through the control over the gas circuit. Compared with an existing gas-liquid pressurization cylinder, wherein the existing gas-liquid pressurization cylinder is provided with three or more cylinder bodies, and the cylinder bodies are in parallel connection or in serial connection, the gas-liquid pressurization cylinder has the advantages of being exquisite in structure, convenient to machine and high in use efficiency of a gas source. In addition, the design of the structure of conducting reasonable guiding and preventing rotation is added on an output working piston rod of the cylinder, and the installation and application of subsequent use are simplified.

The invention provides a nut protein extraction device with two-level subsidiary teeth and feeding sensor. The nut protein extraction device comprises a smashing module and an enzymolysis module, wherein the smashing module comprises a first-level smashing part, a second-level smashing part and a smashing module shell (5); the first-level smashing part comprises a first-level smashing motor (2), the first-level smashing motor (2) is in power connection with a first-level smashing main shaft (3), and the first-level smashing main shaft (3) stretches into a smashing chamber of the smashing module shell (5) through a left through hole formed in the left side of the smashing module shell (5); the first-level smashing main shaft (3) is rotatablely matched with the left through hole through a bearing part, and first-level smashing teeth (12) are distributed on a part, which stretches into the smashing chamber, of the first-level smashing main shaft.

The invention relates to the field of hydraulic machinery, and provides a swing hydraulic cylinder with a damping function. A hydraulic oil entering through a hydraulic oil inlet pushes a piston gearsleeve to reciprocate linearly, the piston gear sleeve and a rear gland are meshed through a spiral gear, the rear gland is fixed, the piston gear sleeve is also rotated in a spiral direction in the moving process, and the piston gear sleeve is meshed with an outer helical gear of an output shaft through an inner helical gear, so that the output shaft generates reciprocating rotary motion; a hydraulic oil inlet and a hydraulic oil outlet are each provided with two channels, the two channels are separated by a certain distance, and one channel is provided with a damping structure; and an oil cavity of the piston gear sleeve is a conical surface, the conical surface structure of the piston gear sleeve gradually seals the first channel of the hydraulic oil outlet in the process of running theend point, and hydraulic oil flows out only in the channel with the damping structure at the rear. According to the swing hydraulic cylinder, the opening and closing requirements of a flap valve canbe well met, the working reliability of the flap valve is improved, the transient noise of a valve opening and closing is reduced, and the valve closing signal is reliably output.

The invention provides a nut protein extraction device with first-stage secondary teeth and an air blowing stirring device. The nut protein extraction device comprises a grinding module and an enzymatic hydrolysis module, wherein the grinding module comprises a primary grinding part, a secondary grinding part and a grinding module shell (5); the primary grinding part comprises a primary grinding motor (2); the primary grinding motor (2) is connected with a primary grinding main shaft (3) through power; the primary grinding main shaft (3) extends into a grinding chamber of the grinding module shell (5) through a left through hole in the left side of the grinding module shell (5) and is rotatably matched with the left through hole through a bearing part; primary grinding teeth (12) are distributed on a part, extending into the grinding chamber, of the primary grinding main shaft.

The invention discloses a method for reducing oil pump noise. The method comprises the following steps that a power-off signal of an electromagnetic valve coil of an oil pump is obtained, and after the preset time is delayed, the additional force used for reducing the moving speed of an electromagnetic valve needle to a valve seat is exerted on the electromagnetic valve needle of the oil pump; and after the preset time of power-off of the electromagnetic valve coil, the additional force reducing the moving speed of the electromagnetic valve needle is exerted on the valve needle, so that the speed of seating of the electromagnetic valve needle can be reduced in order to reduce the impact strength of the electromagnetic valve needle and the valve seat and reduce the possibility of vibration caused by impact of the electromagnetic valve needle and the valve seat. On the one hand, by reducing impact and vibration, the stability of the oil pump is improved, the noise of the oil pump is reduced, and the NVH performance of a vehicle is improved; On the other hand, the moving speed of the electromagnetic valve needle is reduced, high-speed impact of the electromagnetic valve needle and the valve seat is avoided, the service life of the electromagnetic valve needle is prolonged, and equipment production materials are saved. The invention further discloses an oil pump for realizing the method and an engine comprising the oil pump.