Rotating-anode X-ray tube assembly and rotating-anode X-ray tube apparatus

A rotating-anode X-ray tube apparatus comprising:

• an X-ray tube comprising an anode target including a target layer which emits X-rays, an anode target rotating mechanism configured to rotatably support the anode target, a cathode disposed opposite to the target layer in a direction along an axis of the anode target and configured to emit electrons, and an envelope accommodating the anode target, the anode target rotating mechanism and the cathode;
• a stator coil configured to generate a driving force for rotating the anode target rotating mechanism;
• a housing comprising an X-ray radiation port opening in a direction perpendicular to the axis, and storing and holding the X-ray tube and the stator coil;
• an X-ray radiation window configured to close the X-ray radiation port and to take out the X-rays to an outside of the housing;
• a coolant filled in a space between the X-ray tube and the housing and absorbing at least part of heat produced by the X-ray tube;
• a conduit communicating with the housing and forming, together with the housing, a passage of the coolant;
• and
• a cooler unit attached to the conduit and comprising a circulating pump configured to circulate the coolant and a radiator configured to radiate heat of the coolant,
• wherein the housing includes a first divisional part which includes the X-ray radiation port and to which the X-ray tube is directly or indirectly fixed, and a second divisional part located on a side opposite to the anode target with respect to the anode target rotating mechanism and coupled to the first divisional part, and
• a coupling surface between the first divisional part and the second divisional part is located on one plane, and is inclined to the axis, with exclusion of a direction perpendicular to the axis.

A rotating-anode X-ray tube apparatus comprising:

• an X-ray tube comprising an anode target including a target layer which emits X-rays, an anode target rotating mechanism configured to rotatably support the anode target, a cathode disposed opposite to the target layer in a direction along an axis of the anode target and configured to emit electrons, and an envelope accommodating the anode target, the anode target rotating mechanism and the cathode;
• a stator coil configured to generate a driving force for rotating the anode target rotating mechanism;
• a housing including an X-ray radiation port opening in a direction perpendicular to the axis, and storing and holding the X-ray tube and the stator coil;
• an X-ray radiation window configured to close the X-ray radiation port and to take out the X-rays to an outside of the housing;
• a coolant filled in a space between the X-ray tube and the housing and absorbing at least part of heat produced by the X-ray tube;
• a conduit;
• another coolant;
• and
• a cooler unit,
• wherein the housing includes a first divisional part which includes the X-ray radiation port and to which the X-ray tube is directly or indirectly fixed, and a second divisional part located on a side opposite to the anode target with respect to the anode target rotating mechanism and coupled to the first divisional part,
• a coupling surface between the first divisional part and the second divisional part is located on one plane, and is inclined to the axis, with exclusion of a direction perpendicular to the axis,
• the X-ray tube comprises a cooling passage configured to radiate at least part of heat produced,
• the conduit communicates with the cooling passage of the X-ray tube through the housing,
• the another coolant is filled in the cooling passage and the conduit, and absorbs at least part of heat produced by the X-ray tube, and
• the cooler unit is attached to the conduit and comprises a circulating pump configured to circulate the another coolant and a radiator configured to radiate heat of the another coolant.