A test device for measuring the damping effect of high-pressure turbine working blades

Abstract

The invention discloses a testing device for measuring a damping effect of working blades of a high-pressure turbine. The testing device comprises a stationary fixture, a fixture frame, a support, a pin shaft, a long rocker arm, a short rocker arm, a force applying bolt, force transmission arms, a front baffle plate, a rear baffle plate, a top block, weights, the working blades and a locking plate, wherein the working blades are arranged on the stationary fixture, the stationary fixture is pressed in the fixture frame through a nut, the short rocker arm is embedded and sleeved at the inner part of the long rocker arm, and the short rocker arm and the long rocker arm are commonly arranged on the pin shaft; the weights are respectively suspended at the positions of grooves of the long rocker arm and the short rocker arm, the other ends of the long rocker arm and the short rocker arm are respectively contacted with one force transmission arm by being used as force applying devices of a system, and force can be transmitted to a damping fin arranged between the two blades; and the front baffle plate, the stationary fixture and the rear baffle plate are fixedly arranged together through bolts. The testing device disclosed by the invention has the advantages that the structure is simple, the force bearing situation of the working blades of the high-pressure turbine during the working of an engine can be fully simulated, and guarantees are provided for the research on the safety performance and the reliability of the engine.

Description

technical field [0001] The invention relates to the field of test devices for working blades of high-pressure turbines, in particular to a test device for measuring the damping effect of working blades of high-pressure turbines. Background technique [0002] The existing high-pressure turbine working blade damping effect test device can only measure the vibration of a single high-pressure turbine working blade, and cannot simulate the centrifugal force generated by the damping block or locking plate on the high-pressure turbine working blade under working conditions. The damping of high-pressure turbine working blades measured by existing test devices can only obtain the damping data of a single high-pressure turbine working blade, and the damping effect law of high-pressure turbine working blades that is more in line with the actual situation cannot be obtained, which is not conducive to the damping block of the high-pressure turbine of the engine design and research. Con...

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Problems solved by technology

[0002] The existing high-pressure turbine working blade damping effect test device can only measure the vibration of a single high-pressure turbine working blade, and cannot simulate the centrifugal force generated by the damping block or locking plate on the high-pressure turbine working blade under the working state.

The damping of high-pressure turbine working blades measured by existing test devices can only obtain the damping data of a single high-pressure turbine working blade, and the damping effect law of high-pressure turbine working blades that is more in line with the actual situation cannot be obtained, which is not conducive to the damping block of the high-pressure turbine of the engine design and research

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