Hitachi Construction Machinery Co., Ltd.

Hitachi Industrial Equipment Systems Co., Ltd.

Shigenori Aoki

Shigeru Miwa

Hajime Mizunoya

Seiji Ishida

Satoshi Kikuchi

Takenori Hiroki

Tsutomu Miyoshi

Itsuro Sawada

Tohru Miyata

Makoto Ishijima

Yoshio Akutsu

Seigo Kikuchi

To uniformly cool down armature windings along the circumferential direction of a stator in a generator motor. A generator motor includes a statorfixed to the inner diameter side of a housing, a rotorrotatably supported by bearings, and armature windings wound around the teeth of a stator core. Each of bracketsprovided via the bearingshas a passagethrough which cooling oil flows and injection holeswhich communicate with the passage and inject cooling oil at positions opposite to winding ends of the armature windings. Cooling oil is injected toward the winding ends of the armature windings from the injection holesof the bracketsarranged on opposite axial sides of a shaft. In the flow rate distribution of the oil from the plurality of the injection holes, the flow rate of the oil from any of the injection holesis set to be greater as the position of the injection holeis higher above the level of the shaft. The arrangement pitch among the injection holesprovided on each of the bracketsis dense in a vertically upper portion of the bracket, and gradually sparser in a portion thereof closer to the level of shaft

Generator motor and electric vehicle using same

This portable ultrasonic detector has a moved distance instrument comprised of an encoder for detecting a moved amount and a counter for counting the moved amount signal outputted from the encoder, as a means for obtaining position information of an ultrasonic probe. When moving the ultrasonic probe on the surface of the object on the occasion of the inspection, the moved distance instrument measures the moved amount of the ultrasonic probe. The measured moved amount of the ultrasonic probe is sent to an arithmetic processing section of the device body. Also, the ultrasonic detector detects A-scope data when scanning the inspected object with the ultrasonic probe, and executes the predetermined processing by using the data. The ultrasonic detector combines the A-scope data and the moved distance data of the ultrasonic probe to make an inner scope image (B-scope image, etc). When repeatedly scanning the same spot of the object with the ultrasonic probe in order to make the B-scope image, etc. and display them on a display section, peaks of defect echo waves are memorized in piles, and further two defect images or more are displayed on the B-scope image. This ultrasonic detector is configured to draw a storage-type B-scope images. Thereby, defect images can be evaluated in detail and a defect position can be detected accurately.

Portable ultrasonic detector

A non-destructive inspection device has an inspection unit body and a support casing which is used as a set-up type device by combining the inspection unit body and the support casing in ordinary inspection, and is used as a portable type device by separating them for special inspection situations involving narrow places or high places. The support casing can be freely combined to or separated from the inspection unit body. When combining the two components, the non-destructive inspection device can carry out the inspection based on a stable set-up mode in the same way as conventional devices. When separated, the inspection unit body is used as a portable device.

Portable non-destructive inspection device and support casing therefor

Growing community of inventors

Kasumigaura, Japan

Shigenori Aoki