3 results about "Drop impact" patented technology

This utility model discloses an adjustable drop test device for metal components, belonging to the technical field of drop test devices. The adjustable drop test device for metal components includes a support base, on the top of which are mounted a vertical drop test component, a spill drop test component, and an adjustable drop impact platform component. The vertical drop test component includes four guide rods fixed to the top of the support base. This utility model, by setting up a horizontal vertical drop test component and a spill drop test component, uses the guide rods as a base and a lifting mechanism to adjust the height of the placement base, combined with a limiting structure to achieve a vertical free fall of the component, thereby simulating drop scenarios at different heights. The spill drop component allows the metal component to be thrown in a parabolic trajectory, recreating an accidental drop. Therefore, this device can simulate both vertical and spill drop scenarios of metal components, solving the problem of the limited functionality of existing drop test devices and improving its practicality.

The application provides a kind of active and passive combination ice prevention method and device, including ice prevention demand surface, synthetic jet exciter, hydrophobic material layer, and hydrophobic material is pre-set on the ice prevention demand surface;When water droplet impacts the ice prevention demand surface, at this time the surface has ice prevention demand, synthetic jet exciter is used to spray jet on the ice prevention demand surface, jet is directly impacted by water droplet on the ice prevention demand surface, changes the water droplet motion trajectory and weakens the speed of water droplet impacting the ice prevention demand surface, regulates the impact dynamic characteristics of liquid droplet, reduces the contact time, the velocity gradient of jet and wall produces lift to promote liquid droplet to quickly separate and away from surface, hot jet maintains super-hydrophobic good performance, super-hydrophobic material reduces jet energy consumption, to achieve the purpose of active and passive combination ice prevention.The application can meet the large-area ice prevention demand under low energy consumption condition, reduce the cost and complexity of ice prevention device, and improve the ice prevention effect.

This disclosure aims to provide a drop impact testing apparatus capable of reliably impacting a test specimen with a first weight. [Solution] A drop impact test apparatus according to one aspect of the present disclosure is a drop impact test apparatus capable of performing an impact test by dropping a first weight onto a test specimen, comprising: a guide rail extending in the vertical direction; a frame body guided by the guide rail and capable of free falling in the vertical direction; a first weight that falls together with the frame body and collides with the test specimen; and a connecting mechanism that connects the frame body and the first weight so that the weight of the first weight is selectively loaded onto the test specimen, wherein the connecting mechanism holds the first weight in a predetermined position relative to the frame body when the frame body is free falling and does not restrain the vertical upward movement of the first weight relative to the frame body when it collides with the test specimen.