A special adapter and fixing device for 10-ton planetary roller screw loading test

Abstract

A 10-ton grade planetary roller lead screw loading test special switching-over and fixing device includes a lead screw pair switching-over sleeve (1) and the like; the lead screw pair switching-over sleeve (1) is externally provided with a four-row angular contact ball bearing (4), and the four-row angular contact ball bearing (4) is arranged in a mounting hole at the middle part of a four-row bearing fixed support (2); a sleeve locking nut (5) is arranged on the lead screw pair switching-over sleeve (1); one end of a lead screw (7) is arranged in the lead screw pair switching-over sleeve (1),sleeve anti-rolling screws (6) are arranged at a port of the lead screw pair switching-over sleeve (1), are distributed along the circumference, and fix the lead screw (7) radially; a bearing fixingend cover (3) is arranged on the four-row bearing fixed support (2) and presses the four-row angular contact ball bearing (4) tightly; the four-row bearing fixed support (2) is fixed on an external mounting structure. The conflict problem between the short time overload design of a linear electromechanical actuator and special loading test and assessment of transmission parts is solved.

Description

technical field [0001] The invention belongs to the technical field of transmission component testing devices, and relates to a special adapter and fixing device for loading tests of planetary roller screw screws. Background technique [0002] Due to its high thrust, high precision, high frequency response and long life, the planetary roller screw pair has gradually become an important transmission device in the fields of all-electric aircraft and weaponry, as well as petroleum, chemical, and machine tools in the future. Since the planetary roller screw adopts thread meshing transmission, more contact points determine that it has a higher load-carrying capacity than a ball screw. For example, a screw pair with a nominal diameter of 30mm has an axial load of nearly 10 tons. , this remarkable feature is widely used in linear electromechanical actuating devices, which solves the application requirements of small volume and large load of aircraft flight control system. [0003]...

AI Technical Summary

Problems solved by technology

[0005] If the bearing capacity test is carried out on the by-products of the planetary roller screw used in the existing electromechanical actuators, according to the loading test specifications of the transmission device, the screw interface designed for short-term overload cannot meet the requirements of long-term and large-load tests. If the angular contact ball bearing is damaged, a bearing with a larger rated load must be selected. For this reason, it is necessary to invent a special adapter and fixing device for the loading test of the 10-ton planetary roller screw to adapt to the dynamic performance assessment of the single-machine transmission components.

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