101results about How to "Avoid bending moment" patented technology

The invention relates to a dynamo-electrical machine (1) with a stator (4) and a rotor (5), which is rotatably arranged relative to the stator (4) about an axis of rotation (R). The stator (4) and / or the rotor (5) has a plurality of segments (4a, 4b) arranged one after another in the rotational direction (S) of the rotor (5). The segments (4a, 4b) have a flange (9a, 9b) at the side ends (13a, 13b) thereof in the rotational direction for connection to segments (4a, 4b) arranged adjoining one another in the rotational direction (S), and the flanges (9a, 9b) have at least one hole (10a, 10b) in the rotational direction (S). Flanges (9a, 9b) facing one another at the side ends (13a, 13b) in the rotational direction of segments (4a, 4b) arranged adjoining one another are connected to one another with a screw connection (6) passing through a hole (10a, 10b). To connect the flanges (9a, 9b) facing one another, a sleeve (8) having an external thread (8a) is arranged in the hole (10a, 10b) of at least one of the flanges (9a, 9b) facing one another at the side ends (13a, 13b) in the rotational direction. The hole (10b) of at least one of the flanges (9a, 9b) facing one another at the side ends (13a, 13b) in the rotational direction has an internal thread (11b), the internal thread (11b) of the hole (10b) being screwed into the sleeve (8). The sleeve (8) creates a spacing between the flanges (9a, 9b) facing one another. A screw (12) passes through the holes (10a, 10b) of the flanges (9a, 9b) facing one another at the side ends (13a, 13b) in the rotational direction, and through the sleeve (8).

The invention discloses a track beam setting up device and method, and belongs to the technical field of elevated and bridge construction, in order to solve the problem of poor positioning accuracy of track beam lifting. The device comprises a first upper frame and a second upper frame, wherein the first upper frame is arranged at the end of a track beam already mounted in place, and the second upper frame is arranged at the end of a to-be-mounted track beam and is butted against the first upper frame. The second upper frame drives the to-be-mounted track beam to move towards the direction away from the first upper frame under pushing of a hydraulic jack of the first upper frame. The method includes: lifting the to-be-mounted track beam to a place through a large-sized crane, controlling the spacing between the to-be-mounted track beam and the track beam already mounted in place to be 30mm< / =d<50mm, then mounting the first upper frame, the second upper frame and the hydraulic jack, when a lifting hook is not loosened completely, starting the hydraulic jack to push the second upper frame to drive the to-be-mounted track beam to move, measuring d manually, and stopping the hydraulic jack when d=50mm. The device is high in mounting and positioning accuracy, convenient to operate, simple in structure and low in production cost.

The invention provides a loading and unloading handling mechanical arm for a solar cell module, and the mechanical arm provided by the invention is used for realizing the functions of loading and unloading in a solar cell module producing process. The loading and unloading handling mechanical arm is characterized by consisting of a mechanical arm mechanism I, a horizontal motion unit II, two vertical motion units III, a pallet lift mechanism IV and a frame V, wherein the mechanical arm mechanism is of an aluminum alloy frame combined structure, and is provided with a plurality of groups of sucker modules so as to realize safe handling of solar cell modules in different specifications; and the horizontal motion unit and the vertical motion units adopt servo motors as drive, and drive the mechanical arm mechanism through a synchronous cog belt and a ball screw assembly respectively to realize accurate motion positioning in horizontal and vertical directions, and the motion units of two directions can independently or simultaneously move. A position servo control system is of a hierarchical control structure formed by a human-computer interaction layer, a motion control layer and a servo control layer. The handling mechanical arm has the advantages of large working space, high positioning accuracy, small motion inertia, reliable and smooth motion and suitability for handling large-sized fragile solar cell modules in different specifications.

A double-shaft high-low cycle complex fatigue tester comprises a hydraulic fatigue tester, an upper clamping head, a lower clamping head, an electromagnetic vibration exciter, a sample, a fixture, and a locating connecting device. The electromagnetic vibration exciter is connected with a middle clamping block 2 in the fixture via a cylindrical connector, a connecting rod and a U-shaped connector in a positioning connecting device; the middle clamping block 2 and a middle clamping block 1 are used for clamping a square mass boss at the middle part of the sample via a connecting piece, and the two ends of the sample are connected with a plywood in the fixture via the connecting piece; the plywood is connected with the connector in the fixture via bolts in the connecting piece; and the vertical ends of the connector are placed in the grooves of the upper clamping head and the lower clamping head of the hydraulic fatigue tester, contacted with the hydraulic fatigue tester, and clamped tightly via the hydraulic pressure of the tester. The tester is simple in structure and convenient to operate, solves the problems of load interference and load coordination in the vertical direction and the horizontal direction during bidirectional loading aiming at the plate-shaped sample, and can be used for simulating fatigue load borne by the blades of the rotor of a gas turbine engine.