SU61585A1 - Dynamometer for investigating the forces acting on the model of the vessel pulled through in the basin - Google Patents

Description

The proposed dynamometer is intended to accurately measure the moment that occurs when towing with a constant trim and constant speed models of speedboats, seaplane boats, plates, etc. in the pool. This dynamometer differs from the known ones in that it is made in the form of a T-shaped pi-i4ara, non-horizontal B blocks for flexible connection with the model, and at the end of the vertical part is a spring associated with the indicator.

The dynamometer (s, m. Figure) is arranged on the farm, secured e. On the towing carriage. The main lever / is mounted on the knives on the truss and has the shape of an overturned letter T. At the end of the horizontal parts of the lever J two blocks 2 rotate on laric bearings, and steel tape 3 is slung through each block. The second ends of the belts 3 are connected to the pointer // of the surfacing model, connected: y to the common cable 4, slung over the fixed block. Unloading load 12 is suspended from cable 4.

The upper end of the vertical part of the lever / has a spring-loaded spring 6 fixed in a new direction, the free end of which is passed between the two hinge sites; and 7 to reduce friction in sealing the spring. Adjacent to the upper lever 1 is an elastically fortified scraper, which, through an intermediate damper JO, transmits a force to a knob of 8 m. angular readings ind. of the gauge according to the calibration curve of the instrument with a reference accuracy of up to + 0.1 kg.

The model is suspended symmetrically about its center of gravity to the tapes 3; Tander 5 is attached to a model defined by a particular factor. When towing a model with a constant predetermined speed, unequal forces arise in the ribbons of the bifilar suspension, the difference being perceived by a dynamometric spring 6 at the end of the vertical part of the main lever). This lever allows a slight angular movement around the axis. Spring deflection, proportional to the difference in force, is measured by an indicator-defibometer.

Subject invention

Dynamometer for studying the forces acting on the model of the vessel pulled in the pool, using a discharge device suspended on the block, as well as an oil damper, characterized in that it is made in the form of a T-shaped lever that carries blocks on its horizontal part with the model under test, and at the end of the vertical part - a strip dynamometer spring connected by means of the indicated lever with the indicator of the forces developing when pulling the model.