摘要:
An electric compressor includes a compression unit that compresses a refrigerant, an electric motor that is coupled with the compression unit via a main shaft and a housing that accommodates the compression unit and the electric motor. The electric compressor further includes an end-side bearing holding part that is provided near an axial end of the housing closer to the electric motor and a rolling bearing that has an outer ring press-fitted into the end-side bearing holding part and an inner ring into which an end of the rotating shaft is press-fitted, and that supports the main shaft, in which an opening into which an assembly jig for supporting the rolling bearing when the main shaft is press-fitted into the inner ring can be inserted and removed is provided in an end surface of the housing near the end-side bearing holding part.
摘要:
In an inverter-integrated electric compressor (1) provided with an inverter accommodating section (9) on the periphery of a housing (2) and an inverter (20) provided therein, the inverter accommodating section (9) is divided into a first accommodating section (9) accommodating an inverter module (21) equipped with a power system board on which semiconductor switching devices etc. are mounted and a CPU board on which a control and communication circuit etc. are mounted, and a second accommodating section (40) accommodating high-voltage-system components (30), such as a common-mode coil (35), a normal-mode coil (36), and a smoothing capacitor (37), provided on a high-voltage line (34) for supplying DC power from a high-voltage power supply to the inverter module (21), the accommodating sections (9) and (40) being separately provided on the periphery of the housing (2).
摘要:
Provided is an oriented piezoelectric ceramic of satisfactory piezoelectricity, which includes a metal oxide represented by (1−x)NaNbO3-xBaTiO3. Also provided are a piezoelectric element using the oriented piezoelectric ceramic which includes the metal oxide represented by (1−x)NaNbO3-xBaTiO3, and a liquid discharge head, an ultrasonic motor, and a dust removing device which use the piezoelectric element. An oriented piezoelectric ceramic includes as a main component a metal oxide represented by the following general formula (1), in which the oriented piezoelectric ceramic has a lead content and a potassium content that are each 1,000 ppm or less: (1−x)NaNbO3-xBaTiO3 . . . General formula (1), where a relationship of 0
摘要:
A friction material contains: at least one kind of a titanate compound having a shape having a plurality of convex portions; and a bio-soluble inorganic fiber. In the titanate compound, a three-dimensional shape of a particle thereof has a plurality of convex portions.
摘要:
Provided is a Bi-based piezoelectric material having good piezoelectric properties. The piezoelectric material includes a perovskite-type metal oxide represented by the following general formula (1): Ax(ZnjTi(1-j))l(MgkTi(1-k))mMnO3 General formula (1) where: A represents a Bi element, or one or more kinds of elements selected from the group consisting of trivalent metal elements and containing at least a Bi element; M represents at least one kind of an element selected from the group consisting of Fe, Al, Sc, Mn, Y, Ga, and Yb; and 0.9≦x≦1.25, 0.4≦j≦0.6, 0.4≦k≦0.6, 0.09≦l≦0.49, 0.19≦m≦0.64, 0.13≦n≦0.48, and l+m+n=1 are satisfied.