34results about How to "Meet vibration requirements" patented technology

The invention relates to a five-cylinder diesel engine crankshaft balance system which comprises a crankshaft, balance weights and balance mechanisms, wherein the crankshaft comprises a free end, a power output end and bell cranks, which are sequentially a first bell crank, a second bell crank, a third bell crank, a fourth bell crank and a fifth bell crank along the free end towards the power output end. The five-cylinder diesel engine crankshaft balance system is characterized in that a crank of the first bell crank is provided with the balance weight I; a crank of the fifth bell crank is provided with the balance weight II; a crank in the bell crank adjacent to the power output end is provided with the balance weight III; a crank in the fourth bell crank adjacent to the free end is provided with the balance weight IV; the second bell crank is provided with a first drive tooth ring for driving the first balance mechanism; and the fourth bell crank is provided with a second drive tooth ring for driving the second balance mechanism. The five-cylinder diesel engine crankshaft balance system effectively solves the problem of imbalance among the rotary inertia torque, first-order reciprocating inertia couple and second-order reciprocating inertia couple in the five-cylinder diesel engine, so that the engine can satisfy the vibration requirements, thereby promoting the application and development of the five-cylinder diesel engine.

The invention discloses an electric oil-free main air compressor, and belongs to the technical field of air compressors. The electric oil-free main air compressor comprises a fan, an air compressor body, a motor, a cooler, dampers, water drainage electromagnetic valves, a pull rod and a housing. The cooler comprise a middle cooler body and a rear cooler body. At least four dampers are mounted on a fan support and a motor support correspondingly, and are connected with an automobile body. The water drainage electromagnetic valves are mounted at the lower end of the middle cooler body and the lower end of the rear cooler body. The pull rod enables the motor support and the air compressor body to be connected and locked. A damping material layer is arranged in the housing, and the air compressor body is composed of a main shell and a compression cylinder assembly. A bent axle is arranged in the main shell, and the compression cylinder assembly is in an X shape and is composed of at least one high-pressure cylinder assembly and at least two low-pressure cylinder assemblies. According to the electric oil-free main air compressor, the potential hazards of oil leaking and mixing of the air compressor are avoided through air cooling, and the maintaining cost is lowered; the compression cylinder assembly forms reasonable air flow direction, and the maximum cooling efficiency is achieved; damping materials are coated on the housing, and noise is lowered.

The invention provides a gear shifting and vibration reduction assembly and a car gear shifting system, and relates to the technical field of the car gear shifting system. The gear shifting and vibration reduction assembly comprises a gear shifting arm, a balancing weight structure and a vibration reduction structure; the gear shifting arm and a speed changer are connected through a gear shiftingrod pin; the balancing weight structure is rotationally connected with the gear shifting rod pin; the gear shifting arm and the balancing weight structure are connected through a connector; the gear shifting arm can drive the balancing weight structure through the connector to rotate around the gear shifting rod pin; and the vibration reduction structure is arranged between the connector and the gear shifting arm and / or between the connector and the balancing weight structure. The car gear shifting system at least comprises a gear shifter, a gear shifting flexible shaft, the speed changer andthe gear shifting and vibration reduction assembly; the gear shifting flexible shaft is connected between the gear shifter and the gear shifting arm; and the gear shifting arm is arranged on the speedchanger. The problem that in the prior art, a balancing weight is directly connected with a gear shifting arm, so that vibration is transmitted to a gear shifting handball to easily cause numbness issolved.

The invention belongs to the technical field of micro motors, and specifically discloses an XYZ three-direction vibration motor, which includes a casing, a base, a vibrator assembly and a stator assembly. The casing and the base are combined to form an accommodation space. The vibration block and the stator assembly include coils and flexible circuit boards; the XY direction vibration block and the Z direction vibration block are respectively fixed and suspended in the accommodation space by elastic members, and a round hole is set in the middle of the XY direction vibration block, and the round hole is surrounded by the Z direction vibration block Four corners of the vibrating block in the XY direction are inlaid with magnets, and a coil is provided directly below the magnet. The vibrating block in the Z direction is provided with a magnetic shell, which fixes the Z-direction drive magnet, and a magnetic shell and a Z-direction drive magnet. There is a coil; the coil is electrically connected to the flexible circuit board, and the flexible circuit board is arranged on the base. The XYZ three-directional vibration motor provided by the present invention can realize three-dimensional vibration, anti-magnetic leakage, anti-collision, fast vibration response, and good vibration effect.

The invention provides an aluminum supporting arm for an automobile rearview mirror and a manufacturing method for the aluminum supporting arm for the automobile rearview mirror. The aluminum supporting arm for the automobile rearview mirror is composed of an aluminum pipe, an aluminum sleeve, an upper protection cover and a lower protection cover, wherein the aluminum pipe and the aluminum sleeve are both made of aluminum alloy, the aluminum pipe is in a C shape, the aluminum sleeve is fixedly connected with the top end of the aluminum pipe, the aluminum sleeve is in a cylinder shape which is opened on two sides, an arc-shaped notch is formed in the top end of the aluminum pipe, the appearance of the notch is matched with the outer wall of the aluminum sleeve, the aluminum sleeve is fixed on the notch through welding, more than two connecting holes are formed in the bottom of the aluminum pipe, the connecting holes are through holes and distributed in an up-down mode, the upper protection cover wraps and covers the upper portion of the aluminum pipe and the aluminum sleeve, and the lower protection cover wraps and covers the lower portion of the aluminum pipe. The invention further provides the manufacturing method for the aluminum supporting arm for the automobile rearview mirror. The manufacturing method for the aluminum supporting arm for the automobile rearview mirror is simple in process and capable of achieving industrialized production.

The invention discloses a system for producing reinforced concrete pipes through double-vibration source extrusion demoulding. The system comprises a foundation pit, a material conveying device, a lifting device, a vibrating table, an internal circle mold vibrating tube, an external circle mold tube structure and a hydraulic extrusion device, wherein the material conveying device and the lifting device are arranged outside the foundation pit; the vibrating table, the internal mold vibrating tube, the external mold tube structure and the hydraulic extrusion device are arranged in the foundation pit; a baffle support structure covering the foundation pit is arranged above the external circle mold tube structure. Compared with current systems adopting a 'centrifugal manufacturing method', an 'overhang roll manufacturing method' and a 'mandrel vibrating method', during the process of producing the reinforced concrete pipes through double-vibration extrusion, the system disclosed by the invention is small in used power, and is capable of saving energy to a greater degree; moreover, the pipe walls of the produced reinforced concrete pipes are smooth from inside to outside; the system disclosed by the invention is high in safety, convenient in operation, high in production efficiency, convenient to maintain and environmentally friendly during a pipe producing process, and has a significant advantage in producing series large-diameter reinforced concrete pipes.

The invention relates to a gradient thermal insulating layer and a preparation method and a preparation device thereof. The preparation method comprises the following steps: cutting two or more pieces of a heat insulating material according to the size of the internal surface of a to-be-heat-insulated workpiece; smearing an adhesive to the internal surface of the workpiece, bonding the cut heat insulating material on the internal surface of the workpiece in sequence, and bonding two adjacent layers of the heat insulating material; spraying steeping liquid of two or more different concentrations on the surface of the heat insulating material; and drying to obtain the gradient thermal insulating layer, wherein the heat insulating material is flexible porous heat insulating material, the steeping liquid has hardening characteristic after drying, and the spraying sequence for the steeping liquid of different concentrations is from high concentration to low concentration. The invention also provides a device for preparing the gradient thermal insulating layer. The gradient thermal insulating layer has gradually changed hardness gradient, which is more suitable for practical applications.

The invention discloses a high-speed dynamic balancing calibration method of gas turbine rotors with a power of 254 MW and relates to a dynamic balancing calibration method of gas turbine rotors, solving the problem that the existing dynamic balancing calibration method of gas turbine rotors with a power of 254 MW has various processes and long balancing cycle. The method comprises the following steps: 1, rotor turning: arranging preinstalled rotors into a vacuum warehouse to carry out rotor turning; 2, low-speed dynamic balancing: carrying out low-speed dynamic balancing at a rotating speed of 500 r / min; and 3, high-speed dynamic balancing: carrying out high-speed dynamic balancing at a rotating speed of 3000 r / min so as to complete the dynamic balancing of rotors. By using the high-speed dynamic balancing calibration method of the gas turbine rotors disclosed by the invention, an original low-speed dynamic balancing calibration method is greatly simplified, and only once low-speed dynamic balancing and once high-speed dynamic balancing are required to be performed in the whole process, so that the operating procedure is less, the balancing cycle is short, and the balancing effect is good, thereby meeting the field vibration requirements of a machine set, and improving the accuracy level of dynamic balancing. The method is used for the dynamic balancing calibration of gas turbine rotors.

The invention belongs to the technical field of micro motors, and specifically discloses an XYZ three-directional vibration motor, which includes a casing, a base, a vibrator assembly and a stator assembly. The casing and the base are combined to form an accommodation space. The vibration block and the stator assembly include coils and flexible circuit boards; the XY direction vibration block and the Z direction vibration block are respectively fixed and suspended in the accommodation space by elastic members, and the circular hole set in the middle of the XY direction vibration block surrounds the Z direction vibration block. Around the block; the four corners of the vibrating block in the XY direction are inlaid with magnets, and there is a coil directly below the magnet. The vibrating block in the Z direction is provided with a magnetic shell, which fixes the Z-direction drive magnet, and the gap between the magnetic shell and the Z-direction drive magnet Coils are provided; the flexible circuit board is arranged on the base, and the first coil and the second coil are fixed on the flexible circuit board. The invention can realize three-dimensional vibration, anti-magnetic leakage, anti-collision, fast vibration response and good vibration effect.

The invention discloses a vacuum blood collection tube centrifuge, which comprises a casing (1), a centrifugal motor (2) and a rotating basket frame (3); the output end of the centrifugal motor (2) is connected with the rotating basket frame (3) And it is used to drive the rotating basket (3) to rotate; the rotating basket (3) is provided with a plurality of hanging baskets (7), and it is characterized in that: the casing (1) has a centrifugal chamber (1- 1), and the rotating basket (3) is located in the centrifugal chamber (1-1); the rotating basket (3) is fixed with a plurality of radial struts (3-1), each The outer end of the radial strut (3-1) is connected with the kinematic pair between the inner wall of the centrifugal chamber (1-1). The invention has small vibration and low noise during operation, is more suitable for working conditions of high rotational speed and high centrifugal force, and simultaneously avoids strict restrictions on the number and position of vacuum blood collection tubes.