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Planetary roller screw life test bench form and position error self-adaptive device

A life test, planetary roller technology, applied in the direction of measuring device, testing of mechanical components, testing of machine/structural components, etc., can solve the problem that the accuracy of the test bench cannot meet the requirements, and the accuracy of the test bench cannot be determined.

Pending Publication Date: 2022-04-26
中国船舶重工集团公司第七0四研究所
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] In the planetary roller screw life test, testers may encounter situations where the accuracy of the test bench cannot meet the requirements, and the existing testing conditions cannot determine the accuracy of the test bench, etc.

Method used

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  • Planetary roller screw life test bench form and position error self-adaptive device
  • Planetary roller screw life test bench form and position error self-adaptive device
  • Planetary roller screw life test bench form and position error self-adaptive device

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Embodiment Construction

[0031] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0032] Such as figure 2 As shown, the shape and position error adaptive device of the planetary roller screw life test bench of the present invention is used to adaptively compensate the planetary roller screw 9 (see Figure 8 ) During the life test, due to the fact that the shape and position tolerance of the test bench cannot meet the requirements, and the lead screw is deformed due to the large length-to-diameter ratio and large load, the axis of the inner hole of the center frame and the axis of each point of the lead screw exist in each degree of freedom. error.

[0033] The device is mainly composed of center frame 1, lock nut 2, stop washer 3, ball hinge assembly 4, cross slider 5, left nut cover 6, right nut cover 7, pin 8, steel ball 10 and other parts of the life test bench Composition, the ball joint assembly 4 is fixedly connected with th...

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Abstract

The invention relates to a form and position error self-adaptive device of a planetary roller screw life test bench, a spherical hinge assembly is fixedly connected with a center frame, and a ball head in the spherical hinge assembly can freely rotate without translation relative to the center frame; the ball head is connected with a left nut sleeve through a locking nut, a cross-shaped sliding block is installed between the left nut sleeve and a bearing cover, the left nut sleeve and a right nut sleeve are fixedly connected through a screw to form a nut sleeve assembly, and a nut of the planetary roller lead screw to be tested is installed in a cavity in the nut sleeve assembly. A gap is reserved between the outer circle of the nut and the outer circle of the nut flange and the nut sleeve assembly, the nut is fixed on the nut sleeve assembly through a pin penetrating through the nut flange, a gap is also reserved between the pin and a screw hole of the nut flange, and steel balls are evenly distributed in the two ends of the nut sleeve assembly to clamp the nut flange. And the nut has translational degrees of freedom in two radial directions relative to the nut sleeve assembly, and has four degrees of freedom except the degree of freedom of rotation around the axis of the lead screw and the degree of freedom of movement in the axis direction of the lead screw relative to the center frame.

Description

technical field [0001] The invention relates to the field of loading life test of a planetary roller screw, in particular to a test device for shape and position error of an adaptive life test bench. Background technique [0002] Compared with ball screws, planetary roller screws have significant advantages such as strong load capacity, high input speed, high axial stiffness, long life, large diameter and small lead, and high precision. It is one of the key basic components of linear actuators in the fields of high-speed heavy-duty, CNC machine tools and precision instruments, and has been widely used. [0003] Fatigue life is one of the key performance indicators of planetary roller screws. At present, the conventional research method is to use the life test bench to continuously load and run-in the roller screws, and deduce the dynamic bearing capacity of the screws according to the failure time. [0004] The basic structure of the existing test bench developed for the ba...

Claims

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Application Information

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IPC IPC(8): G01M13/00G01N3/02G01N3/32
CPCG01M13/00G01N3/02G01N3/32
Inventor 黄鸿坤邓攀童小川徐江王跃武
Owner 中国船舶重工集团公司第七0四研究所
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