41results about How to "Small commutation impact" patented technology

The invention discloses a safety control method for fast revolution of a flat machine, which comprises the following steps: firstly, a coder of a servo motor of the machine head of the flat machine is simultaneously connected with a main control panel and a server, the servo motor is in control connection with the server, and the main control panel is in communication connection with the server; then, the main control panel obtains both the operation start point and the operation end point of each line before operation, and the maximum coder value which the operation of each line reaches through reading and analyzing design information of a product, then the main control panel is combined with the acceleration and deceleration performance control parameter to calculate the coder values corresponding to each deceleration position point and each acceleration position point; the main control panel sends the positions of each deceleration position point and each acceleration position point, the corresponding coder values and target speed to the server; finally, in the process of operation of each line, the server directly monitors the output value of the coder to enable the servo motor to operate at each deceleration position point and each acceleration position point according to destined coder values, so that optimal revolution control is realized.

The invention discloses a distribution system of an engineering machine. The distribution system of the engineering machine comprises a first swinging valve oil cylinder and a second swinging valve oil cylinder which are reverse in telescopic state and are opposite to each other, wherein a piston rod extending end of the first swinging valve oil cylinder and a piston rod extending end of the second swinging valve oil cylinder are hinged to the same end of a swinging and reversing mechanism; a rodless cavity of the first swinging valve oil cylinder and a rodless cavity of the second swinging valve oil cylinder are respectively communicated with two working oil openings of a reversing valve; a rod cavity of the first swinging valve oil cylinder is connected with an oil tank through a first throttling damper; a rod cavity of the second swinging valve oil cylinder is connected with the oil tank through a second throttling damper. Through the simple structure, the vibration and shock of the distribution system in the high-speed reversing process can be effectively solved; the stability and the reliability of the system are improved; the service life is prolonged; the development and production costs are reduced. The invention also discloses an engineering machine comprising the following distribution system.

The invention discloses a mechanical feedback type speed-adjustable self-reversing gas pressurization cylinder comprising a hydraulic reversing valve and a tail end displacement feedback mechanism. Atthe tail end of the pressurization stroke, a piston of the pressurization cylinder pushes a feedback rod in a connecting body to move, and movement of the feedback rod is transmitted to a valve element of the hydraulic reversing valve through a feedback connecting rod, so that the valve element correspondingly moves; an internal flow channel is switched, and self-reversing of the gas pressurization cylinder is achieved; and the maximum displacement and the movement speed of the valve element of the reversing valve are changed by adjusting the position of the installation fulcrum of the feedback connecting rod and changing the feedback coefficient, and therefore the reversing speed of the pressurization cylinder is adjusted. According to the mechanical feedback type speed-adjustable self-reversing gas pressurization cylinder, compared with an electric control reversing pressurization cylinder, an electromagnetic reversing valve does not need to be adopted, the risk that electric sparksignite working gas is eradicated, the mechanical feedback type speed-adjustable self-reversing gas pressurization cylinder is particularly suitable for pressurizing conveying of flammable and combustible gas such as natural gas, and safety of the gas pressurization cylinder can be remarkably improved, reversing impact of the gas pressurization cylinder is reduced, and therefore vibration and noise of the gas pressurization cylinder are weakened.

A piston-controlled reversing valve comprises a valve body; a valve core is arranged in the valve body, and is arranged in a main hole in the valve body; both ends of the valve core are provided with two pin shafts which are in contact with the end face of the valve core; both ends of the valve core are provided with restoring springs; both ends of the valve body are provided with end face screw-caps; the pin shafts run through the end face screw-caps; both ends of the valve body are connected with front caps; a piston is arranged in each front cap; the pin shafts contacts the pistons; and control oil ports are arranged on the outer side of the front caps. The control oil ports of the piston-controlled reversing valve are directly arranged on the two end caps; the pistons are driven by liquid or gas so as to drive the valve core to reverse. Due to the directly operated structure, the piston-controlled reversing valve is easy to machine and convenient to repair and disassemble.

The invention discloses an electromagnetic direct-drive reversing multi-way valve, and belongs to the technical field of multi-way valves. A reversing valve core is slidably mounted in the valve coremounting hole in a valve body, an electromagnetic driving device is fixedly connected with each of the two ends of the valve core mounting hole in the valve body, an inner spigot is formed in each ofthe two ends of the valve core mounting hole in the valve body, an outer blocking platform is arranged at the end of the reversing valve core, a pressing ring is mounted at the end of the reversing valve core in a sleeving mode, the inner ring of the pressing ring is pressed on the outer side of the outer blocking platform, the outer ring of the pressing ring is located in the inner spigot in theend of the valve core mounting hole in the valve body, and a resetting spring is connected with the outer side of the pressing ring. According to the electromagnetic direct-drive reversing multi-way valve, the electromagnetic driving device is connected with each of the two ends of the valve core mounting hole, driven connection with the reversing valve core through the pressing ring and the resetting spring is achieved, the structural part is simplified, and the valve body can be more compact and light in weight; and the valve core is flexible and fast in reversing action and high in controllability, the reversing impact is small, and the reversing response speed of the multi-way valve can be increased by more than 100 milliseconds.

The invention discloses a horizontal planet gear ring walking beam pumping unit. The horizontal planet gear ring walking beam pumping unit is composed of an oil pumping system, a walking beam system, a balancing system, a machine frame system, an inner gear ring reversing system, a motor, a transmission system, a braking system and the like. The motor transfers movement and power to the inner gear ring reversing system through the transmission system. One-way rotational movement is converted into reciprocating rectilinear movement. A rack on the inner gear ring reversing system drives a big gear ring of a walking beam to do reciprocating rotation along a mandrel of the walking beam. A horse head of the walking beam and a steel rope are used for driving the oil pumping system to move, and then oil pumping is achieved in an oil field. The horizontal planet gear ring beam-pumping unit has the advantages that the reliability of the walking beam pumping unit is high, and the steel rope is not prone to damage and also has the advantages of a walking-beam-free oil pumping unit which is efficient, capable of saving energy, long in stroke, large in displacement, high in load, stable and reliable in reversing and the like, thereby being applicable to conventional well oil pumping, deep well oil pumping, extradeep well oil pumping, marine oil pumping and the like.

The invention discloses a special clamp for a five-axis machining center of an automobile steering knuckle structural part, and relates to the technical field of tool clamps. A clamp body is of a triangular structure, a first telescopic fixing block is fixed to the first corner of the clamp body through a fastening screw, a second telescopic fixing block is fixed to the second corner of the clamp body through a fastening screw, and a third telescopic fixing block is fixed to the third corner of the clamp body through a fastening screw. A fourth telescopic fixing block is arranged between the second telescopic fixing block and the third telescopic fixing block and fixedly connected with the clamp body through a fastening screw. The four telescopic fixing blocks on the clamp are uniformly controlled by a hydraulic oil way system, a steering knuckle is placed at the corresponding positioning position, clamping and fixing actions can be completed at a time through the hydraulic oil way system, shaking cannot be generated in the machining process, movement is uniform and stable, reversing impact is small, the machining operation precision of workpieces is high, consistency is well, and the clamp has larger market popularization value.

The invention discloses a hydraulically-controlled self-reversing gas pressurizing cylinder. The hydraulically-controlled self-reversing gas pressurizing cylinder is used in a gas compressor, a low-pressure hydraulic cavity is divided into two parts by buffering sleeves at the tail end of the stroke, one part discharges oil outwards through a throttling opening of an adjustable needle valve, hydraulic oil is provided for a control valve cavity of a hydraulically-controlled reversing valve through an internal flow channel, the automatic reversing action of the gas pressurizing cylinder is completed, the size of the throttling opening of the needle valve is adjusted, and the buffer effect of the inertia load of the pressurizing cylinder can be adjusted; and the other part is used for communicating a high-pressure hydraulic cavity and the low-pressure hydraulic cavity of the pressurizing cylinder at the tail end of the pressurizing stroke so as to realize self-pressure relief of a hydraulic system at the tail end of the stroke of the pressurizing cylinder. According to the hydraulically-controlled self-reversing gas pressurizing cylinder, self-reversing at the tail end of the stroke of the pressurizing cylinder and effective buffering of the inertia load of the pressurizing cylinder can be achieved at the same time, the gas pressurizing cylinder has the obvious effects of reducinghydraulic reversing impact and reducing inertia load impact, the service life of the gas pressurizing cylinder can be effectively prolonged, overall operation vibration and noises of the hydraulic compressor are reduced, and the gas pressurizing cylinder has the relatively-high engineering practical application value.

The invention relates to a pumping unit, in particular to a dual-chain drive pumping unit. The pumping unit comprises reverse wheels, balancing weights, chain wheels, chains, bolt cam follower needle roller bearings, a pumping rod, a reverse frame and steel wire ropes. The steel wire ropes are laid on the reverse wheels, one end of each steel wire rope is connected with the reverse frame, and the other end of each steel wire rope is connected with the balancing weight. The lower surface of the reverse frame is connected with the pumping rod. Bearing parts of the bolt cam follower needle roller bearings make contact with the reverse frame, and bolts of the bolt cam follower needle roller bearing are fixedly connected to hinge pins of the chains. The chains cover the two upper chain wheels and the two lower chain wheels, a U-shaped groove is formed in the reverse frame, a guide rail is arranged in the groove, the bolt cam follower needle roller bearings can roll on the guide rail, the two lower chain wheels are connected with an electromotor through a chain transmission device. The dual-chain drive pumping unit is large in stroke and load, high in pumping efficiency, small in reverse impact, and high in adaptability, and the reverse frame is long in service life.

A mold conveying platform comprises a support, a second belt wheel, a transverse driving motor, a longitudinal driving motor, a jacking device, sliding rods, a fifth belt wheel and a control box, wherein the upper portion of the support is provided with a frame defined by supporting plates, a transverse roller support and a longitudinal roller support are arranged in the frame, the two ends in the transverse roller support are correspondingly provided with two eccentric hole pairs, the two ends of the longitudinal roller support are correspondingly provided with two eccentric shaft hole pairs, the eccentric hole pairs of the transverse roller support correspond to the eccentric shaft hole pairs of the longitudinal roller support respectively, the eccentric hole pairs of the transverse roller support and the corresponding eccentric shaft hole pairs of the longitudinal roller support are connected through conversion wheels, push rods are arranged at the bottoms of the conversion wheels, the bottoms of the push rods are connected to the sliding rods in a sliding mode, one or more transverse driving wheel sets are arranged on the two sides of the transverse roller support correspondingly, one or more longitudinal driving wheel sets are arranged in the longitudinal roller support, and the transverse driving motor, the longitudinal driving motor and the jacking device are all electrically connected with the control box. The conveying efficiency is high.