A compact testing module (1) for use in dynamic characteristics experiments of hydraulic damper valve under extreme high or low temperature conditions, an automated system and approach based on the compact testing module (1). The compact testing module (1) comprises an outer cylinder assembly (2), a guide seat assembly (3), a foam/air separator for guide seat (4), an inner cylinder (5), a piston-and-rod assembly (6), fluids (7), a foot valve assembly (8), a washer for inner cylinder (9), a washer for foot valve assembly (10), a fluid-guiding structure (11), a magnet (12), a fluid-returning assembly (13), a framework oil seal (14), a screw cover (15) and a dust wiper (16). Based on the integrated design principle, the compact testing module (1) allows the fluids (7), the pressure fluid supplier, the hydraulic damper valve being tested (32), the pressure sensors be all integrated in one component.

An embodiment of the present application discloses an anti-fall device including a trigger mechanism, a deformable structure and a shell. The deformable structure is connected with the trigger mechanism and is set to be compressed and elastically deformed when located in the shell. The trigger mechanism is set in the shell and is configured to drive the deformable structure to move in a direction away from the trigger mechanism, so that the deformable structure pops out of the shell and recovers to a natural state from a compressed state.

An energy-supply rotary inertia driver system for an offshore platform includes an annular fixed plate, an active control module, a wind power generation module and a solar power generation module. The system can monitor a motion state of the offshore platform in real time, and can generate a force through the active control module if necessary to apply a force torque of the offshore platform to further achieve the vibration suppression. Moreover, when the offshore platform is under normal operation, the system can act as an energy supply device via wind and solar power generation to feed electric energy to the active control module and other electrical equipment on the offshore platform when needed.

A method and apparatus for a shock absorber having a damping fluid compensation chamber with a gas charge. In one aspect, a partition separates a first chamber portion from a second chamber portion, wherein the first portion of the chamber is at a first initial gas pressure and the second portion of the chamber is at a second initial pressure. A valve separates the first and second chamber portions and opening the valve comingles the first and second chamber portions so that the combined chamber portions are at a third pressure. In another aspect, a piston disposed through a wall is in pressure communication with the gas charge and is biased inwardly toward a pressure of the charge, whereby an indicator is movable by the piston in response to the pressure.

A vibration damper for vehicles includes a damper tube which is at least partially filled with damper medium and which has a longitudinal axis along which a piston rod is movable back and forth. A working piston is movable jointly with the piston rod, by means of which working piston the interior space of the damper tube is divided into a piston-rod-side working space and a piston-rod-remote working space. The vibration damper has a leakage indicator for the damper medium.

A gas cylinder actuator with overtravel indicator device, which includes a tubular containment jacket, an end face, an opposite annular guiding portion, a stem-piston arranged so as to pass through the annular guiding portion, wherein the stem-piston protrudes from the jacket in an axial direction, a chamber for pressurized gas being defined between the tubular jacket, the end face, the annular guiding portion for the stem-piston, an indicator device for indicating that overtravel for the stem-piston has occurred; and an annular body, which is inserted partially into a corresponding seat between the jacket and an annular portion so as to surround the outer lateral surface of an end portion of the annular guiding portion; the annular body rests in an axial direction on an element that protrudes radially within the jacket and is integral with the jacket.

A method and apparatus for a shock absorber having a damping fluid compensation chamber with a gas charge. In one aspect, a partition separates a first chamber portion from a second chamber portion, wherein the first portion of the chamber is at a first initial gas pressure and the second portion of the chamber is at a second initial pressure. A valve separates the first and second chamber portions and opening the valve comingles the first and second chamber portions so that the combined chamber portions are at a third pressure. In another aspect, a piston disposed through a wall is in pressure communication with the gas charge and is biased inwardly toward a pressure of the charge, whereby an indicator is movable by the piston in response to the pressure.

A method for monitoring a dual-stage, separated gas/fluid shock strut includes receiving, by a controller, a primary chamber temperature sensor reading, a primary chamber pressure sensor reading, and a shock strut stroke sensor reading, calculating, by the controller, a secondary chamber nominal pressure based upon the primary chamber temperature sensor reading, determining, by the controller, a shock strut stroke associated with the secondary chamber nominal pressure, calculating, by the controller, a volume of oil in an oil chamber, a volume of gas in a primary gas chamber, a number of moles of gas in the primary gas chamber, a volume of oil leaked into the primary gas chamber, a volume of gas in a secondary chamber, and a number of moles of gas in the secondary chamber.

A method for monitoring a dual-stage, separated gas/fluid shock strut includes receiving, by a controller, primary chamber temperature and pressure sensor readings, secondary chamber pressure and temperature sensor readings, and a shock strut stroke sensor reading, determining, by the controller, a shock strut stroke at which a secondary chamber is activated, calculating, by the controller, a volume of oil in an oil chamber of the shock strut, a primary chamber gas volume of, a number of moles of gas in, and a volume of oil leaked into, a primary gas chamber of the shock strut, a secondary chamber gas volume in, a volume of oil leaked into, and a number of moles of gas in, the secondary chamber, based upon at least one of the secondary chamber pressure sensor reading, and the secondary chamber temperature sensor reading.

The invention relates to a monitoring sensor (1) for measuring, receiving and transmitting a physical variable (P) of a gas pressure spring (2), comprising a sensor element (3) and a pressure relief opening (4), characterized in that the pressure relief opening (4) can be switched from an operating state into a safety state by remotely triggering the sensor element (3) in order to evacuate the gas pressure spring (2), wherein the monitoring sensor (1) is designed with a connection device (5), which can be detached in accordance with the intended use, for connection to a coupling (6) of the gas pressure spring (2).