Pump with vibration sensor and its production process

A pump comprising a body enclosing within a removable cover:

• an impeller attached to a rotating shaft driven by an electric motor surrounded by a casing with an inlet orifice and an outlet tube between which lies the impeller,
• a motor control device with a frequency converter,
• an accelerometer type vibration sensor, mounted on a non-rotating part of the pump that produces vibration waveforms,
• a computing device connected by cable firstly to the vibration sensor and secondly to the frequency converter, in such a manner as to analyse the vibration waveforms and send a motor control signal for the motor to the frequency converter that is a function of the vibration waveform received from the vibration sensor, wherein the computing device has a memory, in which vibration waveforms are saved, and a communication terminal enabling it, when the cover is removed, to communicate with an external information device used to initialise the memory by sending messages from the external device to the computing device, communication from the communication terminal with the external device being interrupted when the cover is replaced while the pump is running, wherein the computing device has a vibration waveform analysis section and the memory also saves the vibration waveforms received, which were not already saved in the memory, the analysis section being designed so that, by comparing an instantaneous vibration waveform received from the vibration sensor, which was not already saved in the memory, with the vibration waveforms saved in the memory, it sends to the frequency converter a motor control signal identical to that sent previously for the vibration waveform saved in the memory, that most closely resembles the instantaneous vibration waveform received from the vibration sensor.