Valve having a motor arranged inside a tube having sections with different diameters
AssigneeDanfoss A/S
InventorSigurd Larsen
Life of this patent
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Abstract
A valve (1), in particular expansion valve, is described including a valve element (6) driven by a rotary motor (7), wherein the motor (7) includes a rotor (9) arranged inside a motor section (19) of a tube (14) and a stator (8) arranged outside the motor section (19) of the tube (14) and the rotor (9) is supported by a bearing (15), which bearing (15) is mounted with press fit in a bearing section (16) of the tube (14). Such a valve should have a small motor and a tube which can be produced with low costs. To this end the motor section (19) and the bearing section (17) include different diameters.
Claims14
A valve comprising a valve element driven by a rotary motor, wherein the motor comprises a rotor arranged inside a motor section of a tube and the rotor is supported by a bearing, which bearing is mounted in a bearing section of the tube, wherein the motor section and the bearing section comprise different diameters, wherein the bearing is press fit in the bearing section and a transition section between the bearing section and the motor section is inclined with respect to an axis of rotation of the rotor, wherein the bearing is a first bearing and the bearing section is a first bearing section, wherein the rotor is supported by a second bearing arranged on a side of the motor opposite to the first bearing, the second bearing being mounted in a second bearing section of the tube, wherein the motor section and the second bearing section comprise different diameters, wherein the second bearing is arranged wholly within the tube, and wherein the tube is closed at a first end and comprises a flange at a second end which is formed radially outwards from the tube.
Dependencies are inferred from the claim text.