System for mounting an annular component on a shaft

Abstract

A system for mounting an annular component on a shaft, comprising (a) a hydraulic nut having an annular coaxial cavity and a ring-like piston, displaceable within the cavity; (b) a displacement sensor for providing a displacement signal indicating the axial displacement of the piston within the cavity; (c) a wireless displacement transmitter for transmitting the displacement signal; (d) a pressure sensor for providing a pressure signal indicating a pressure within the cavity; (e) a wireless pressure transmitter for transmitting the pressure signal; (f) a pump arranged to pump fluid into the cavity; and (g) a remote control device having a communications device arranged to receive transmitted pressure and displacement signals, wherein the remote control device is arranged to output control information for controlling the pump.

What is claimed is: 
     
         1 . A system for mounting an annular component on a shaft, the system comprising:
 a hydraulic nut having an annular coaxial cavity and a ring-like piston, displaceable within the cavity;   a displacement sensor for providing a displacement signal indicating the axial displacement of the piston within the cavity;   a wireless displacement transmitter for transmitting the displacement signal;   a pressure sensor for providing a pressure signal indicating a pressure within the cavity;   a wireless pressure transmitter for transmitting the pressure signal;   a pump arranged to pump fluid into the cavity; and   a remote control device having a communications device arranged to receive transmitted pressure and displacement signals,   wherein the remote control device is arranged to output control information for controlling the pump.   
     
     
         2 . The system according to  claim 1 , wherein the outputted control information is a control signal for controlling the pump,
 the system further comprising a wireless pump receiver arranged to receive the control signal and control the pump.   
     
     
         3 . The system according to  claim 2 , wherein the remote control device is programmed to:
 transmit a control signal to activate the pump;   receive a pressure signal from the wireless pressure transmitter;   compare the received pressure signal with a pressure threshold;   when the received pressure signal reaches the pressure threshold, receive a first displacement signal from the wireless displacement transmitter and calculate a displacement threshold;   receive a further displacement signal from the wireless displacement transmitter;   compare the received further displacement signal with the displacement threshold; and   when the received displacement signal reaches the displacement threshold, transmit a control signal to deactivate the pump, and provide an alert after a predetermined amount of time.   
     
     
         4 . The system according to  claim 1 , wherein the remote control device comprises a display arranged to display the progress of a method from a start point by way of an intermediate point to a finish point, the method involving operating the pump to effect an increase in pressure from an initial value of pressure to a desired value of pressure followed by an increase in displacement from an initial value of displacement to a desired value of displacement,
 wherein:   the start point corresponds to an initial value of pressure sensed by the pressure sensor;   the intermediate point corresponds to a desired value of pressure sensed by the pressure sensor and an initial value of displacement sensed by the displacement sensor; and   the final point corresponds to a desired value of displacement sensed by the displacement sensor.   
     
     
         5 . The system according to  claim 4 , wherein the outputted control information is constituted by the display of the method progress, such that pump operation may be continued until the final point is reached. 
     
     
         6 . The system according to  claim 4 , wherein the display represents the progress using at least one of:
 a graphical representation of a progress bar that fills up as the method progresses, and   a coloured indicia that changes colour as the method progresses.