Abstract: A vacuum pump includes a housing, a magnetic bearing, and a magnet nut. The magnetic bearing has a first permanent magnet arranged at the periphery of a magnet holder and a second permanent magnet arranged in the rotor to face the first permanent magnet in a radial direction. The magnet nut has a main body portion and protrusions. The main body portion adjusts the position of the first permanent magnet relative to the second permanent magnet by rotating relative to the magnet holder. The protrusion protrudes from an upper surface of the main body portion, and has contact target surfaces contactable with a first tool configured to rotate the main body portion from the upper surface side of the main body portion and contactable with a second tool configured to rotate the main body portion from the outer periphery side of the main body portion.

Abstract: A vacuum pump includes a housing, a magnetic bearing, and a magnet nut. The magnetic bearing has a first permanent magnet arranged at the periphery of a magnet holder and a second permanent magnet arranged in the rotor to face the first permanent magnet in a radial direction. The magnet nut has a main body portion and protrusions. The main body portion adjusts the position of the first permanent magnet relative to the second permanent magnet by rotating relative to the magnet holder. The protrusion protrudes from an upper surface of the main body portion, and has contact target surfaces contactable with a first tool configured to rotate the main body portion from the upper surface side of the main body portion and contactable with a second tool configured to rotate the main body portion from the outer periphery side of the main body portion.

Abstract: A vacuum pump comprises: a rotor rotatable in a predetermined rotation direction; and a case housing the rotor; and a fixed component arranged facing an inner wall of the case. A clearance is formed between the inner wall of the case and the fixed component, and a groove allowing communication between the clearance and an exhaust path in the case is formed at either the inner wall of the case or the fixed component.

Abstract: A monitoring device includes an acquisition unit configured to acquire a captured image of a display panel of a control device configured to control an analyzer, an image storage unit configured to store the captured image, and a state determination unit configured to determine a state of the analyzer based on the captured image.

Abstract: This management device for a material testing machine includes: an acquisition unit that acquires at least either a captured image of a material testing machine body or a captured image of a control device that causes the material testing machine body to execute a test; and a data-processing unit that associates the captured image with the material testing machine and stores a result in an image storage unit.

Abstract: A vacuum pump comprises: a rotor rotatable in a predetermined rotation direction; and a case housing the rotor; and a fixed component arranged facing an inner wall of the case. A clearance is formed between the inner wall of the case and the fixed component, and a groove allowing communication between the clearance and an exhaust path in the case is formed at either the inner wall of the case or the fixed component.

Abstract: A vacuum pump comprises: a rotary body including a rotor blade and a rotor shaft; a case rotatably housing the rotary body; a motor configured to drive the rotor shaft of the rotary body; a bearing arranged at an end portion of the rotor shaft; and at least three balance correction portions including a first balance correction portion provided on one end side of the rotary body in an axial direction, a second balance correction portion provided on the other end side of the rotary body in the axial direction, and a third balance correction portion provided between the first balance correction portion and the second balance correction portion. Balance correction by an n-plane method, where n?3, is available such that any of the three balance correction portions is accessible from an outside of the case.

Abstract: A vacuum pump comprises: a rotary body including a rotor blade and a rotor shaft; a case rotatably housing the rotary body; a motor configured to drive the rotor shaft of the rotary body; a bearing arranged at an end portion of the rotor shaft; and at least three balance correction portions including a first balance correction portion provided on one end side of the rotary body in an axial direction, a second balance correction portion provided on the other end side of the rotary body in the axial direction, and a third balance correction portion provided between the first balance correction portion and the second balance correction portion. Balance correction by an n-plane method, where n 3, is available such that any of the three balance correction portions is accessible from an outside of the case.

Abstract: A vacuum pump for rotary driving a rotor by a motor to perform vacuum pumping, wherein a motor rotor of the motor includes a yoke fixed to a shaft of the rotor, and a permanent magnet held at the yoke, and the yoke includes a holding portion provided apart from the shaft and configured to hold the permanent magnet, and a pair of fitting portions provided respectively at both ends of the holding portion in an axial direction and bonded to the shaft by fitting, and a radial thickness dimension of each fitting portion is set less than that of the holding portion.

Abstract: A vacuum pump for rotary driving a rotor by a motor to perform vacuum pumping, wherein a motor rotor of the motor includes a yoke fixed to a shaft of the rotor, and a permanent magnet held at the yoke, and the yoke includes a holding portion provided apart from the shaft and configured to hold the permanent magnet, and a pair of fitting portions provided respectively at both ends of the holding portion in an axial direction and bonded to the shaft by fitting, and a radial thickness dimension of each fitting portion is set less than that of the holding portion.