60results about How to "Eliminate bending moment" patented technology

The invention relates to the mining machinery and provides vibration-absorption mineral mining equipment, aiming at solving the problem that front-and-back vibration cannot be effectively inhibited in the existing mineral mining equipment. The vibration-absorption mineral mining equipment provided by the invention comprises a vibration absorption device, wherein the vibration absorption device comprises a first hydraulic cylinder, a second hydraulic cylinder, a third hydraulic cylinder, a fourth hydraulic cylinder, a first supporting seat and a second supporting seat, wherein the first hydraulic cylinder and the second hydraulic cylinder are arranged on the first side of the mining equipment; the third hydraulic cylinder and the fourth hydraulic cylinder are arranged on the second side of the mining equipment; the first supporting seat is connected with the outer side ends of the first hydraulic cylinder and the second hydraulic cylinder; the second supporting seat is connected to the outer side ends of the third hydraulic cylinder and the fourth hydraulic cylinder. When the mineral mining equipment operates, the first hydraulic cylinder, the second hydraulic cylinder and the first side of the mining equipment form a triangular structure, the third hydraulic cylinder, the fourth hydraulic cylinder and the second side of the mining equipment also form a triangular structure, and the first supporting seat and the second supporting seat push against the side wall of a mineral drive. The vibration of the mineral mining equipment with the structure in all directions, caused by the cutting-off operation, can be effectively inhibited.

The invention provides a dynamic and visualized weld shear stress fatigue test device, which includes a frame, one end of a test piece with a weld is fixed on the frame, and the other end is cantilevered; the cantilever ends of the test piece are respectively equipped with The dynamic system and stress control system that apply the load to the test piece; the mounting frame for installing the power system and the stress control system is installed on the outside of the test piece, and the other ends are respectively connected to the cantilever end of the test piece; an optical fiber detection system is installed on the test piece. There is a visual monitoring system on the outside of the weld of the parts, and the stress application system, stress control system, optical fiber detection system, and visual monitoring system are respectively connected to the PLC integrated system. The present invention also provides a method of using the above device. The device of the invention can make the weld be subjected to pure shear stress, and the PLC integrated system can dynamically observe the dynamic process of the shear stress change of the weld, which is more intuitive and convenient. The method of the invention is simple and refined in operation and meets the requirements of the welding seam shear stress fatigue test.

The invention provides a tower crane, a pull rod structure for a balance arm thereof and a mounting method for the structure. The pull rod structure for the balance arm comprises two pull rods which are crossed to form a certain angle, and an adaptor, wherein each pull rod is provided with a first end connected with the balance arm of the crane, and a second end connected with the tower top of the crane; the distance of the first ends of the two pull rods is greater than that of the second ends of the two pull rods; the adaptor is arranged on the second ends of the pull rods; the second ends of the pull rods are connected to two first connecting pieces arranged on the adaptor at intervals; and each first connecting piece is respectively provided with a first end connected with the adaptorand a second end connected with the tower top of the crane through a first pin roll. In the mounting method, the pull rod structure for the balance arm is adopted. The pull rod structure for the balance arm is stressed stably and reasonably, and is safe and quick to mount.

The invention discloses a fan impeller for cooling, wherein, the impeller comprises a wheel hub and a plurality of blades; blade installation seats are arranged around the wheel hub; a swing connection component is arranged on the blade handle of each blade; and swing connection is carried out by the swing connection component and the corresponding blade installation seats. As swing connection is adopted, the blades can swing and shimmy when the fan is operating, thus eliminating the bending moment in the vertical direction of the blade handle, decreasing bending stress of the blade handle, avoiding the damage on the blade handle, and being beneficial for implementing effective application of the large-diameter impeller; and the fan impeller also has the advantage of conveniently adjusting the installation angles of the blades, thus the installation angles can be preset according to the use requirements of a customer before delivery to achieve more convenient and faster field installation.

A three-dimensional decoupling ultrasonic nanometer vibration table comprises a base. An ultrasonic vibration table is arranged on the base. The bottom of the ultrasonic vibration table and the base are in embedded connection. A first ultrasonic vibration drive mechanism and a second ultrasonic vibration drive mechanism which are used for carrying out X-direction and Y-direction ultrasonic vibration drive on a main vibration table of the ultrasonic vibration table are arranged in the ultrasonic vibration table in the direction X and the direction Y of the ultrasonic vibration table. A third ultrasonic vibration drive mechanism used for carrying out Z-direction ultrasonic vibration drive on the main vibration table of the ultrasonic vibration table is arranged at the bottom end of the ultrasonic vibration table in the direction Z of the ultrasonic vibration table. The first ultrasonic vibration drive mechanism, the second ultrasonic vibration drive mechanism and the third ultrasonic vibration drive mechanism are perpendicular to one another. The overall design is adopted by the ultrasonic vibration table; the structure is simple and compact; the first-order inherent frequency of theultrasonic vibration table can be effectively improved; and therefore the adjustable frequency range of auxiliary processing of the ultrasonic nanometer vibration table is guaranteed.

The invention discloses a nuclear motor performance verification device, which comprises a closed pressure container, namely LOCA furnace, a nuclear motor, a load, and an intermediate transmission assembly, wherein the LOCA furnace is used for simulating thermodynamics and chemical environment in the safety shell of a nuclear power plant and comprises a closed space formed by an upper plug, a lower plug and a barrel; the nuclear motor is fixedly arranged in the LOCA furnace; the load is arranged outside the LOCA furnace; and the intermediate transmission assembly is inserted into the barrel body of the LOCA furnace for connecting the nuclear motor and the load, and the nuclear motor drives the load to work. The device can verify the performance of the nuclear motor under specific thermotechnical and chemical conditions, and at the same time, reduce equipment damage and improve the utilization rate of equipment.

Various embodiments include a fuel injector assembly for an internal combustion engine comprising: an injector cup; a securing device to fasten the injector cup to the engine; wherein a first end of the injector cup remote from the fuel inlet port comprises an outwardly extending flange; a connector abutting the flange, wherein the injector cup and the fuel injector are secured together through the connector; and a fastening bracket supported on the flange, wherein the injector cup and the connector are secured through the fastening bracket by a fastening device. The fastening device comprises a U-shaped clip with a first arm disposed between a clamping face of the fastening device and the fastening bracket and a second arm generally parallel to the first arm disposed on the opposite side of the fastening bracket.

The invention relates to mining machinery, and particularly relates to a side support device for a coal mining machine, aiming to solve the problem that the existing support device can not effectively inhibit the back and forth vibration of the coal mining machine. In order to achieve the purpose, the side support device comprises a first hydraulic cylinder, a second hydraulic cylinder, a third hydraulic cylinder, a fourth hydraulic cylinder, a first support base and a second support base, wherein the first hydraulic cylinder and the second hydraulic cylinder are arranged on the first side of the coal mining machine, the third hydraulic cylinder and the fourth hydraulic cylinder are arranged on the second side of the coal mining machine, the first support base is connected with the outer side ends of the first hydraulic cylinder and the second hydraulic cylinder, and the second support base is connected with the outer side ends of the third hydraulic cylinder and the fourth hydraulic cylinder. When the side support device works, the first hydraulic cylinder, the second hydraulic cylinder and the first side of the coal mining machine can form a triangular structure, the third hydraulic cylinder, the fourth hydraulic cylinder and the second side of the coal mining machine can also form a triangular structure, and the first support base and the second support base are abutted against the side wall of a coal mine tunnel. The side support device with the structure can be used for effectively inhibiting the back and forth vibration and the left and right vibration of the coal mining machine due to cutting.

The invention discloses a novel sheet levelling mechanism with zero in-plane stress. A conventional levelling machine, particularly an eleven-roll levelling machine structure is improved, a levelling device capable of removing residual stress in a steel plate is designed, and the levelling device is particularly applicable to construction design of luxury cruise ships. The levelling device mainly comprises a levelling mechanism, a stress detection removing mechanism, a pressure control mechanism and an entire rack. According to the levelling device, in-plane stress of the steel plate is zero while leveling is achieved, namely, after levelling, in-plane bending moment of the steel plate is zero, horizontal single stress is zero, and section stress is zero, so that the levelled steel plate can be effectively prevented from warping and deforming due to residual stress inside, service life of the steel plate is prolonged, reliability of the steel plate is improved, and construction of the cruise ships is smoothly carried out.