Organized for youCT tubeSome common failures of:

(1) High-voltage control loop and high-voltage cable faults: including joint aging, oxidation, poor contact, insulation degradation, high-voltage overvoltage, undervoltage or breakdown, high-voltage transformer short-circuit, high-voltage capacitor ignition or breakdown, resulting in imaging Performance drops, snowflakes increase, image artifacts, and even failure to image.

(2) Filament circuit failure: the average emission of the filament decreases, the image snowflake point increases, or the filament is fused and disconnected, there is a high-voltage tubeless current or the current fluctuates greatly, resulting in no radiation, the image is a marble surface, the reason is that the service life has expired , The filament is aging, in emergency, you can consider changing the size of the filament circuit and adjusting the working parameters.

(3) Rotating anode failure: no rotation or low speed, high-speed bearing noise is large, the reason is that the rotating anode bearing is worn or the target surface debris is too much stuck, and the second is the stator coil open circuit or internal inter-turn short circuit, the rotation controller and Inversion trigger fault.

(4) High-pressure ignition: It is divided into ignition in the sleeve and in the core.

A. The ignition in the tube sleeve is caused by the presence of air bubbles in the tube sleeve or the insulation drop of insulating oil or local insulating material in the tube sleeve. The presence of air bubbles in the tube sleeve is due to the high internal temperature of the tube when it is working. In an instant, it can reach more than 3000.c. The insulating oil in the tube sleeve expands and contracts with heat, the volume of the insulating oil shrinks and the airbag in the shrinkage tube is adjusted. If the oil seal is aged or its elasticity fails, the air will enter into the bubble, which is relatively You will hear the sound of fire for hours, and when the bubble is large, it will stop and report overload.

B. The ignition in the tube core is caused by the drop of the vacuum degree of the tube core. The vacuum degree drop of the tube core is usually due to the long storage time of the tube and the outgassing of various materials in the tube core, and the tube is often overheated. It is caused by reasons such as use under load conditions or poor manufacturing of the die. The drop in the vacuum of the die will cause overload, no exposure or high voltage tripping.

(5) Temperature and humidity control, high voltage kV, filament current mA and other detection circuit faults.

(6) Failure of the cooling circulation system The oil pump or fan wears out due to long-term operation, the temperature and pressure sensor fails, the switch falsely alarms, the heat exchanger pollution affects the heat dissipation efficiency, the heat cannot be distributed in time, and the glass tube is overheated and shrinks and breaks.

CT tubeThe ordinary service life is 100,000 to 200,000 times. If careful maintenance, the service life can be increased by 5m100%. Therefore,CT tubeRoutine maintenance is crucial.

(1) Regularly check whether the oil circulation of the bulb is normal and regularly clean the dust on the heat sink.

(2) Regularly detect and monitor the state of the power supply, the phase of the 3-phase power supply, the phase-to-spoke balance is stable, the phase shift and the resistance of the ground wire, whether the grounding is good, and the voltage cannot exceed the rated 15%. The contact should be good, make sure that the silicon pad of the high-voltage cable plug and the high-voltage silicone grease are in good condition, and the contact parts are free of impurities.

(3) Regularly check various working parameters of the tube, mainly including the correction and maintenance of tube current, tube voltage, exposure time, and overload maintenance and installation. Do not exceed the anode heat capacity or heat dissipation ratio to avoid overload use.

(4) Do a good job in the maintenance plan, maintenance work records and fault removal records and other file-building work.