REPAIR, MAINTENANCE, TESTING, CALIBRATION AND INSPECTION OF SPEED GOVERNORS
SUPPLY OF NEW AND RECONDITIONED SPEED GOVERNORS
ORIGINAL SPARE PARTS FOR SPEED GOVERNORS
Our staff at Sirtec solves emergencies promptly, thanks to our ample stock of original spare parts from the major brands, such as Woodward, Regolateurs Europa, Daihatsu, Zexel, and others.
SPEED GOVERNORS AND OVERSPEED SYSTEMS TEST BENCH
Sirtec possesses the latest-generation equipment, such as test benches used to test and calibrate the speed governors, as well as for operational testing. We also have a calibration bench capable of testing overspeed governors.
SPEED AND OVERSPEED GOVERNOR, WHAT IS IT AND HOW DOES IT WORK?
Both the overspeed governor and the speed governor are modelled on Watt’s governor.
The centrifugal governor is a mechanical device that generates a feedback chain through a sensor that provides an angular-velocity based parameter. This parameter can be a mechanical displacement that acts in negative or positive feedback on a supply regulating valve of an engine to keep the speed constant.
It consists of two or more masses spun by a rotating shaft. Due to the centrifugal force, the masses tend to move away or approach the axis of rotation. The distancing or approaching movement is contrasted by a system of springs through an articulated system, as in the case of Watt’s pendulum.
A system of levers transforms the radial displacement of the masses into the axial sliding of a collar. A lever picks up this latter displacement to transfer it to the body to be controlled, which may be a valve for controlling fuel, steam or water in a forced line. If the speed increases, the masses tend to rise and, through the system of levers, they reduce the power of the engine by reducing its power supply. If it decreases, the masses tend to descend and, through the system of levers, they will increase the power of the engine by increasing its power supply. In this way, an automatic mechanical control is carried out, the purpose of which is to maintain the engine at a constant speed.
James Watt designed his first governor in 1788, following a suggestion from his business partner Matthew Boulton. It was a pendulum bearing two masses suspended by two articulated arms.
Therefore, the speed governor, as its name already suggests, serves to govern the engine speed both at idle and at maximum states and performs three fundamental functions: keeping the engine speed correct and constant according to the position of the rack.
We carry out maintenance, calibration and assistance for the following types of speed governors:
mechanical / hydraulic governor with centrifugal masses
via Borzoli, 39/122U
16153 GENOVA (GE) – ITALY
phone. +39 010 6503836
fax. +39 010 6505609