Search

CN-122016267-A - Centrifugal load fatigue test device for counterweight arm

CN122016267ACN 122016267 ACN122016267 ACN 122016267ACN-122016267-A

Abstract

The application relates to the technical field of centrifugal load test devices, in particular to a centrifugal load fatigue test device of a counterweight arm, which comprises a portal frame, an actuator cylinder, a traction rope, a swinging seat, a sliding seat and a ground rail, wherein the actuator cylinder is suspended on the portal frame; the upper end of the traction rope is connected with the actuating cylinder, the lower end of the traction rope is connected with the outer end of the counterweight arm, the upper end of the swinging seat is rotationally connected with the inner end of the counterweight arm, the counterweight arm can rotate along the axis of the swinging seat, the sliding seat is rotationally connected with the lower end of the swinging seat through the first rotating shaft, the swinging seat can swing around the first rotating shaft, the length direction of the ground rail is parallel to the first rotating shaft, and the ground rail is in sliding fit with the sliding seat. The portal frame and the ground rail form a stable supporting system, a multidimensional rotation connecting structure is combined, flexible state adjustment of the counterweight arm is realized, and the total centrifugal force in the actual working of the counterweight arm is accurately simulated by optimizing the design of the height of the swinging seat, the connecting mode of the traction rope and the like, so that the height consistency of the test working condition and the actual working condition is ensured.

Inventors

  • LIU YUFENG

Assignees

  • 惠阳航空螺旋桨有限责任公司

Dates

Publication Date
20260512
Application Date
20251219

Claims (9)

  1. 1. A centrifugal load fatigue test device for a counterweight arm, comprising: A portal frame; The actuator cylinder is suspended on the portal frame; The upper end of the traction rope is connected with the actuating cylinder, and the lower end of the traction rope is connected with the outer end of the counterweight arm; The upper end of the swinging seat is rotationally connected with the inner end of the counterweight arm, so that the counterweight arm can rotate along the axis of the swinging seat; the sliding seat is rotationally connected with the lower end of the swinging seat through a first rotating shaft, so that the swinging seat can swing around the first rotating shaft; The length direction of the ground rail is parallel to the first rotating shaft, and the ground rail is in sliding fit with the sliding seat.
  2. 2. The centrifugal load fatigue test device of a counterweight arm according to claim 1, further comprising a first hanger and a second hanger, wherein the first hanger is mounted on the gantry, the second hanger is rotatably connected with the first hanger through a second rotating shaft, the second hanger is rotatably connected with the actuator cylinder through a third rotating shaft, and the second rotating shaft is perpendicular to the third rotating shaft.
  3. 3. The centrifugal load fatigue test device for the counterweight arm according to claim 2, further comprising a fixing seat, wherein the fixing seat is mounted on the portal frame, a plurality of threaded holes are formed in the fixing seat, and the first hanging seat is mounted at the threaded holes through bolts.
  4. 4.A centrifugal load fatigue test device for a counterweight arm according to claim 3, wherein the axial height of the swing seat is equal to the length of the counterweight arm.
  5. 5. The centrifugal load fatigue test device for a counterweight arm according to claim 4, wherein the swinging seat comprises a connecting section and a profiling section which are integrally connected, the profiling section has a shape consistent with that of a blade, and the connecting section is connected with the sliding seat through a first rotating shaft.
  6. 6. The centrifugal load fatigue test device for the counterweight arm according to claim 5, wherein an angle scale is arranged at a position where the end surface of the profiling section is close to the edge.
  7. 7. The centrifugal load fatigue test device for a counterweight arm according to any of claims 1-6, wherein a force sensor is provided between the actuator cylinder and the haulage rope.
  8. 8. The centrifugal load fatigue test device for a counterweight arm according to any of claims 1-6, and further comprising an adapter mounted to an outer end of the counterweight arm and connected to a lower end of the traction rope.
  9. 9. The centrifugal load fatigue test device for the counterweight arm according to claim 8, wherein the inner wall of the adapter member is attached to the surface of the counterweight arm and is connected by bolts.

Description

Centrifugal load fatigue test device for counterweight arm Technical Field The application relates to the technical field of centrifugal load test devices, in particular to a centrifugal load fatigue test device for a counterweight arm. Background The screw propeller is required to complete a evidence obtaining process according to the airworthiness regulation, wherein the conformity verification of centrifugal load test clauses is a key link for guaranteeing the design and use safety of the screw propeller, and the centrifugal load test of the propeller blade counterweight arm is a core test item which must be developed in the closed-loop clause. In the actual working process of the propeller, the blade counterweight arm not only can make revolution motion along with the whole propeller, but also can make autorotation motion around the axis of the blade during pitch-changing adjustment, and the double motion causes the counterweight arm to bear complex centrifugal load. The existing test device is difficult to accurately simulate the motion state and the stress condition of the counterweight arm under the actual working condition, can not meet the test verification requirements under different angles and different load conditions, further influences the accuracy and the reliability of test results, and is difficult to support compliance requirements of the navigation evidence collection. Therefore, it is needed to design a centrifugal load fatigue test device capable of accurately simulating the actual working condition of a counterweight arm and realizing multi-dimensional state adjustment and stable load loading. Disclosure of Invention The application provides a centrifugal load fatigue test device for a counterweight arm, which is used for solving the problem that the conventional test device is difficult to accurately simulate the motion state and the stress condition of the counterweight arm under the actual working condition and cannot meet the test verification requirements under different angles and different load conditions. The application provides a centrifugal load fatigue test device of a counterweight arm, comprising: A portal frame; The actuator cylinder is suspended on the portal frame; The upper end of the traction rope is connected with the actuating cylinder, and the lower end of the traction rope is connected with the outer end of the counterweight arm; The upper end of the swinging seat is rotationally connected with the inner end of the counterweight arm, so that the counterweight arm can rotate along the axis of the swinging seat; The sliding seat is rotationally connected with the lower end of the swinging seat through a first rotating shaft, so that the swinging seat can swing around the first rotating shaft; The length direction of the ground rail is parallel to the first rotating shaft, and the ground rail is in sliding fit with the sliding seat. In one possible design, the device further comprises a first hanging seat and a second hanging seat, wherein the first hanging seat is installed on the portal frame, the second hanging seat is rotationally connected with the first hanging seat through a second rotating shaft, the second hanging seat is rotationally connected with the actuating cylinder through a third rotating shaft, and the second rotating shaft is perpendicular to the third rotating shaft. In one possible design, the device further comprises a fixing seat, wherein the fixing seat is installed on the portal frame, a plurality of threaded holes are formed in the fixing seat, and the first hanging seat is installed at the threaded holes through bolts. In one possible design, the axial height of the swing seat is equal to the length of the counterweight arm. In one possible design, the oscillating seat comprises a connecting section and a profiling section integrally connected, the profiling section is in the same shape as the blade, and the connecting section is connected with the sliding seat through a first rotating shaft. In one possible design, the end face of the profiling section is provided with an angle scale near the edge. In one possible design, a force sensor is provided between the ram and the pull rope. In one possible design, the device further comprises an adapter piece, wherein the adapter piece is arranged at the outer end of the counterweight arm and is connected with the lower end of the traction rope. In one possible design, the inner wall of the adapter engages the surface of the counterweight arm and is bolted thereto. The beneficial effects of the application are as follows: The centrifugal load fatigue test device for the counterweight arm forms a stable supporting system through the portal frame and the ground rail, realizes flexible state adjustment of the counterweight arm by combining a multidimensional rotation connection structure, accurately simulates the total centrifugal force in the actual work of the counterweight arm by optimizing the