Vane compressor with vane aligners

A vane compressor comprising:

• a cylinder;
• a frame that closes one axial end of the cylinder;
• a cylinder head that closes the other axial end of the cylinder;
• a rotor shaft including a rotary shaft portion supported by the frame and the cylinder head and being eccentric to a center of an inner peripheral surface of the cylinder, and a rotor portion that rotates about the rotary shaft portion in the cylinder;
• vanes installed in the rotor portion and each having a tip portion that moves in the cylinder along with rotation of the rotor portion;
• and
• partial-ring-shaped vane aligners attached to an end surface of each of the frame and the cylinder head on a side of the cylinder to rotate about an axis concentric with the inner peripheral surface of the cylinder, the vane aligners supporting the vanes such that the vanes are rotatable with respect to the rotor portion, wherein
• an angle α of a circular arc constituting a partial ring shape of each vane aligner satisfies a relationship of
• α
• <
• 2
• ⁢
• tan
• -
• 1
• ⁢
• {
• R
• ⁢
• ⁢
• sin
• ⁡
• (
• π
• N
• )
• R
• ⁢
• ⁢
• cos
• ⁡
• (
• π
• N
• )
• +
• e
• }
• (
• 1
• )
• where R is a distance between a center of rotation of each of the vanes with respect to the rotor portion and a center of rotation of the rotor portion, e is a distance between the center of the inner peripheral surface of the cylinder and the center of rotation of the rotor portion, and N is a number of the vanes, and a minute space is maintained between the tip portion of each of the vanes and the inner peripheral surface of the cylinder.