Svenska Rotor Maskiner Ab

Abb Air Preheater Inc.

Stig Lundin

Kurt Karlsson

Birger Pettersson

Hakan Saletti

A method and an arrangement for sensing the clearance between an object and an object-adjacent surface, which is particularly for use in difficult ambient conditions, such as in dirty, corrosive environments and under varying temperature and pressure conditions, e.g. to measure and hold constant the clearance between the sector plates (,) of a regenerative rotary air preheater and the end surfaces of the rotor (,). The sensing device (,) includes a compressed-air operated pipe (,) which is mounted on the object (,) and which includes a sound-emitting opening (,) located adjacent the surface (,), wherein changes in the distance (S) between the object (,) and the surface (,) are represented by changes that occur in the resonant frequency of the pipe (,).

Method and device for sensing a clearance

Device of a rotary regenerative heat exchanger

Rotary displacement compressor having adjustable internal volume ratio

Screw rotor machine with De Laval nozzle for noise reduction

Method for producing pressure pulses in a mass of gas and a device for

Growing community of inventors

Varmdo, Sweden

Stig Lundin