33results about How to "Large temperature control range" patented technology

The invention provides a passive thermal-sensitive fire extinguishing starter. The fire extinguishing starter is provided with a housing; a magnetic power source consisting of a magnetic bar and an armature arranged on the neutral axis position of the housing; the magnetic bar can move relatively to the armature; a spring is mounted at the tail part of the magnetic bar; a pull rod is fixedly connected to the tail end of the magnetic bar; the tail part of the pull rod is extended from the upper end surface of the housing; and a fusible alloy locating structure capable of axially locating the pull rod is arranged at the extending part. The magnetic bar is located in an upper contracting position in the housing by the fusible alloy at the normal temperature; and when the ambient temperature reaches the preset temperature, the fusible alloy melts, so that the magnetic bar is released and moves downwards under the action of the spring, and then, the magnetic bar passes through the armatureto generate the induction starting current, thereby completing the task of starting the passive thermal-sensitive fire extinguishment. The invention systematically integrates the fusible alloy and the magnetic power source, thereby not only expanding the temperature-control range of a starter, but also greatly simplifying the structure and further improving the operating reliability of a magneticpower source.

The invention discloses an accelerating and loading device for an indoor test of road surface materials. The accelerating and loading device comprises a thermostat, an operating desk, a tire, a motor, a transmission belt, a revolution indicator, a water pump, a water tank, a sprinkler head, a temperature sensor, a circulating air inlet, a circulating air outlet, a noise detector, a hydraulic device, a test specimen fastening module, a tension-compression type sensor, a self-lifting type testing wheel, a support wheel, a laser constructor and a computer, wherein the thermostat is positioned at the left side of a test device, the operating desk is positioned at the right lower side of the outer wall of the test device, the tire is positioned at the upper side of the thermostat, and the operating desk comprises a master switch, a rapid stop key, an accelerating operating desk, a loading operating desk, a temperature-control operating desk, a noise display, a water pump switch, a water pump operating knob and a motor switch. The accelerating and loading device for the indoor test of road surface materials is simple, applicable and reliable in operation, and can accurately simulate and detect the noise conditions, the anti-slide properties of test specimens and the mass loss rates of the test specimens of different road surface materials in environments of different temperatures, under different slippery degrees and under different loading effects.

The invention relates to a silicon oil fan clutch, comprising a shell, an oil storage cover, a front cover, a main drive shaft and a main drive plate arranged on the main drive shaft, wherein, the front cover is connected with the shell in a sealing way, the oil storage cover is arranged at the front end of the front cover and forms an oil storage cavity with the front cover, and the main drive plate, the front cover and the shell form a gearing cavity; besides, the front cover is provided with an oil outlet channel; an oil inlet end arranged at the oil outlet channel is provided with a valveplate which is arranged at the end surface of the front cover by an elastic work piece, and the valve plate can open the oil outlet channel as force is imposed upon the valve plate by the elastic work piece; the middle part of the front cover is provided with a through hole, a guide tube end is arranged in the through hole by a guide tube bearing, a thimble is arranged in the guide tube end and pushes against the valve plate, and a guide tube joint is externally connected with a fluid source controlled by an engine control unit. Compared with the prior art, the silicon oil fan clutch of the invention has the advantages of high precision, quick response and wide range of temperature control.