Bearing compression rigidity and torsional rigidity measuring device

Abstract

The utility model discloses a bearing compression rigidity and torsional rigidity measuring device, which comprises a test base table, a compression assembly, a rotatable bearing seat and a torsion assembly, the compression assembly is installed and connected on the upper end position of the test base table, and the front end head of the rotatable bearing seat is provided with the torsion assembly on the test base table. According to the utility model, the rotatable bearing seat and the torsion assembly are both fixed in the T-shaped groove of the test bed plate through screws and T-shaped blocks, and the linear actuator applies a compression force to the helicopter bearing along the Y-axis direction through the compression assembly. Compression deformation of the helicopter bearing can be measured by the displacement sensor, meanwhile, the swing actuator provides torsion around the Y-axis direction through the torsion assembly, the torsion angle of the helicopter bearing can be measured by the angle encoder, and simultaneous measurement of the compression rigidity and the torsion rigidity of the helicopter bearing can be successfully achieved through calculation.

Description

Technical Field

[0001] The utility model relates to the technical field of measuring compression stiffness and torsional stiffness of helicopter bearings, and in particular to a device for measuring compression stiffness and torsional stiffness of bearings. Background Art

[0002] Large-load unmanned helicopters have broad application prospects in military, civil and scientific research fields, and the demand for bearings is increasing. Propeller bearings are key components of helicopters and are related to the load-bearing and stability performance of the aircraft. Research and verification of their performance is crucial. Among them, bearings for UAV propellers are generally a combination of metal and rubber, with good compression stiffness and torsional stiffness.

[0003] The existing method for measuring the compression stiffness and torsional stiffness of helicopter bearings is to use two or more measuring devices to detect them in sequence. This method not only has cumbersome operating steps, but also has the problems of long measurement time and low work efficiency. Utility Model Content

[0004] The utility model aims to provide a bearing compression stiffness and torsional stiffness measuring device to solve the problem in the above background technology that the existing helicopter bearing compression stiffness and torsional stiffness measurement adopts two or more measuring devices to detect in sequence, which not only has cumbersome operation steps, but also has a long measurement time and low work efficiency.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a bearing compression stiffness and torsional stiffness measuring device, comprising a test base, a compression assembly, a rotatable bearing seat and a torsional assembly, wherein the mounting connection is at the upper end position of the test base, the front end of the rotatable bearing seat is located on the test base and is provided with a torsional assembly, the rear end of the torsional assembly is located on the rotatable bearing seat and is provided with a compression assembly, the U-shaped loading frame in the compression assembly is connected to a loading plate with a ball joint to apply a compressive force to the helicopter bearing along the Y axis, the loading plate with a ball joint is installed on a linear guide rail and can slide along the Y axis direction, that is, the compression deformation of the helicopter bearing can be measured by three groups of displacement sensors and averaged, the rotatable bearing seat is fixed to the test base by screws and T-nuts, the positioning key provides a positioning function, wherein the rotatable bearing seat is composed of a precision locking nut, a bearing seat, a loading plate, and a positioning key. The invention is composed of a load shaft, a thrust ball bearing and a deep groove ball bearing. The torsion shaft in the torsion assembly is torsioned around the Y axis, the torsion shaft connects the helicopter bearing and the loading shaft, and transmits the angular deformation caused by the torsion to the angle encoder through a coupling. The angle encoder is fixed on the bracket, the loading plate with a ball joint is installed on the linear guide rail, the linear guide rail is installed on the torsion support seat, the linear guide rail is limited by a limit block, the torsion support seat is installed on the test base through screws and T-nuts and provides torque support, and the positioning key provides a positioning function. The compression assembly can rotate the load seat. After the torsion assembly is installed on the test base, the U-shaped loading frame in the compression assembly applies compression force along the Y axis to realize the compression stiffness measurement of the helicopter bearing; the torsion shaft in the torsion assembly is torsioned around the Y axis to realize the torsion stiffness measurement of the helicopter bearing, and the compression stiffness and torsion stiffness of the helicopter bearing can be measured simultaneously.

[0006] The test base has a T-slot for easy installation and position adjustment of tooling, and a guide groove for easy positioning of tooling.

[0007] In summary, due to the adoption of the above technology, the beneficial effects of the utility model are:

[0008] In the utility model, the rotatable bearing seat and the torsion assembly are fixed in the T-slot of the test bench plate by screws and T-blocks, the linear actuator applies compression force to the helicopter bearing along the Y-axis direction through the compression assembly, the compression deformation of the helicopter bearing can be measured by the displacement sensor, and the swing actuator provides torsion around the Y-axis direction through the torsion assembly, the torsion angle of the helicopter bearing can be measured by the angle encoder, and the compression stiffness and torsion stiffness of the helicopter bearing can be successfully measured simultaneously through calculation. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a three-dimensional structural schematic diagram of a bearing compression stiffness and torsional stiffness measuring device of the utility model;

[0010] Figure 2It is a cross-sectional structural schematic diagram of a bearing compression stiffness and torsional stiffness measuring device of the utility model;

[0011] Figure 3 The utility model is a schematic diagram of the enlarged structure of region A of a bearing compression stiffness and torsional stiffness measuring device.

[0012] In the figure: 100, experimental base; 200, compression assembly; 201, U-shaped loading frame; 202, helicopter bearing; 203, mobile sensor; 204, loading plate with ball joint; 300, rotatable bearing seat; 301, positioning key; 302, precision locking nut; 303, bearing seat; 304, loading shaft; 305, thrust ball bearing; 306, deep groove ball bearing; 400, torsion assembly; 401, angle encoder; 402, bracket; 403, coupling; 404, torsion shaft; 405, linear guide; 406, limit block; 407, torsion support seat. DETAILED DESCRIPTION

[0013] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the utility model for which protection is claimed, but merely represents selected embodiments of the utility model.

[0014] Embodiment 1

[0015] Reference Figure 1 , Figure 2 and Figure 3A bearing compression stiffness and torsional stiffness measuring device includes a test base 100, a compression assembly 200, a rotatable bearing seat 300 and a torsional assembly 400, wherein the rotatable bearing seat 300 is installed and connected to the upper end of the test base 100, the front end of the rotatable bearing seat 300 is located on the test base 100 and the torsional assembly 400 is arranged, and the rear end of the torsional assembly 400 is located on the rotatable bearing seat 300 and the compression assembly 200 is arranged. When in use, the test base has a T-slot for convenience Tool installation and position adjustment, with guide grooves to facilitate tool positioning, further install the rotatable bearing seat 300, including loading shaft 304, thrust ball bearing 305, deep groove ball bearing 306 into bearing seat 303 as shown in the figure and lock them with precision locking nut 302, fix the angle encoder 401 on the bracket 402, fix the bracket 402 on the bearing seat 303, connect the angle encoder 401 and the loading shaft 304 with the coupling 403, install the positioning key on the shaft The bottom of the bearing seat 303 is installed with screws and T-blocks to install the whole on the test base 100, and then the torsion assembly 400 is installed, including first installing the positioning key at the bottom of the support seat 407, installing the linear guide 405 on the torsion support seat 407, installing the ball joint loading plate 204 on the linear guide 405, and installing the limit block 406 to limit the position. After the above is installed, the whole is installed on the test base 100 with screws and T-blocks, and the helicopter bearing 202 is installed on the torsion support seat 407. The rotating shaft 404 is then installed on the torsion shaft 404 on the loading shaft 304, and the ball joint loading plate 204 in the torsion assembly 400 and the helicopter bearing 202 are connected. At this time, three groups of displacement sensors 203 are installed, distributed at 90 degrees, and the deformation values ​​are averaged. Finally, a compressive force is applied to the U-shaped loading frame 201 in the compression assembly 200 along the Y axis and a torsion force is applied to the torsion shaft 404 in the torsion assembly 400 around the Y axis. The compression stiffness and torsion stiffness of the helicopter bearing 204 can be measured simultaneously.

[0016] In the utility model, the U-shaped loading frame 201 in the compression assembly 200 is connected to the ball-jointed loading plate 204 to apply a compressive force to the helicopter bearing 202 along the Y-axis. The ball-jointed loading plate 204 is installed on the linear guide rail 405 and can slide along the Y-axis direction. That is, the compression deformation of the helicopter bearing 204 can be measured by three groups of displacement sensors 203 and the average is taken.

[0017] In the utility model, the test base 100 has a T-slot for facilitating the installation and position adjustment of tooling, and has a guide groove for facilitating the positioning of tooling.

[0018] Working principle: install the loading plate 204 with ball joint on the linear guide 405, install the limit block 406 for limiting, and then use screws and T-blocks to install the whole on the test base 100, install the helicopter bearing 202 on the torsion shaft 404, and then install the torsion shaft 404 on the loading shaft 304, connect the loading plate 204 with ball joint and the helicopter bearing 202 in the torsion assembly 400, and install three groups of displacement sensors 203 at this time, distributed at 90 degrees, and take the average deformation value, and finally apply compression force to the U-shaped loading frame 201 in the compression assembly 200 along the Y axis and apply torsion around the Y axis to the torsion shaft 404 in the torsion assembly 400, so as to realize the simultaneous measurement of the compression stiffness and torsion stiffness of the helicopter bearing 204.

[0019] Embodiment 2

[0020] Reference Figure 1 , Figure 2 and Figure 3 , a bearing compression stiffness and torsional stiffness measuring device. Compared with the second embodiment, the rotatable bearing seat 300 in this embodiment is fixed on the test base 100 by screws and T-nuts, and the positioning key 301 provides a positioning function. The rotatable bearing seat 300 is composed of a precision locking nut 302, a bearing seat 303, a loading shaft 304, a thrust ball bearing 305, and a deep groove ball bearing 306.

[0021] Working principle: Install the rotatable bearing seat 300, including installing the loading shaft 304, thrust ball bearing 305, and deep groove ball bearing 306 into the bearing seat 303 as shown in the figure and locking them with the precision locking nut 302, fix the angle encoder 401 on the bracket 402, fix the bracket 402 and install it on the bearing seat 303, connect the angle encoder 401 and the loading shaft 304 with the coupling 403, install the positioning key at the bottom of the bearing seat 303, and then install the whole on the test base 100 with screws and T-blocks.

[0022] Embodiment 3

[0023] Reference Figure 1 , Figure 2 and Figure 3 , a bearing compression stiffness and torsional stiffness measuring device, compared with the second embodiment, in the torsion assembly 400, the torsion shaft 404 is twisted around the Y axis, the torsion shaft 404 is connected to the helicopter bearing 202 and the loading shaft 304, and the angle deformation caused by the torsion is transmitted to the angle encoder 401 through the coupling, the angle encoder 401 is fixed on the bracket 402, the loading plate 204 with a ball joint is installed on the linear guide 405, the linear guide 405 is installed on the torsion support seat 407, the linear guide 405 is limited by the limit block 406, the torsion support seat 407 is installed on the test base 100 by screws and T-nuts and provides torque support, and the positioning key 301 provides a positioning function.

[0024] Working principle: fix the angle encoder 401 on the bracket 402, fix the bracket 402 on the bearing seat 303, connect the angle encoder 401 and the loading shaft 304 with the coupling 403, install the positioning key at the bottom of the bearing seat 303, and then use screws and T-blocks to install the whole on the test base 100, and then install the torsion assembly 400, including first installing the positioning key at the bottom of the support seat 407, installing the linear guide 405 on the torsion support seat 407, installing the loading plate 204 with a ball joint on the linear guide 405, and installing the limit block 406 for limiting the position, and then use screws and T-blocks to install the whole on the test base 100.

[0025] Embodiment 4

[0026] Reference Figure 1 , Figure 2 and Figure 3 , a bearing compression stiffness and torsional stiffness measuring device, compared with the third embodiment, after the compression assembly 200, the rotatable bearing seat 300 and the torsion assembly 400 are installed on the test base 100, the U-shaped loading frame 201 in the compression assembly 200 applies a compression force along the Y axis to achieve the compression stiffness measurement of the helicopter bearing 204; the torsion shaft 404 in the torsion assembly 400 is twisted around the Y axis to achieve the torsional stiffness measurement of the helicopter bearing 204, and the compression stiffness and torsional stiffness of the helicopter bearing 204 can be measured simultaneously.

[0027] Working principle: install the loading plate 204 with ball joint on the linear guide 405, install the limit block 406 for limiting, and then use screws and T-blocks to install the whole on the test base 100, install the helicopter bearing 202 on the torsion shaft 404, and then install the torsion shaft 404 on the loading shaft 304, connect the loading plate 204 with ball joint and the helicopter bearing 202 in the torsion assembly 400, and install three groups of displacement sensors 203 at this time, distributed at 90 degrees, and take the average deformation value, and finally apply compression force to the U-shaped loading frame 201 in the compression assembly 200 along the Y axis and apply torsion around the Y axis to the torsion shaft 404 in the torsion assembly 400, so as to realize the simultaneous measurement of the compression stiffness and torsion stiffness of the helicopter bearing 204.

[0028] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

[0029] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

Claims

1. A bearing compression stiffness and torsional stiffness measuring device, comprising a test base (100), a compression assembly (200), a rotatable bearing seat (300) and a torsional assembly (400), characterized in that: The (300) is installed and connected to the upper end of the test base (100); the front end of the rotatable bearing seat (300) is located on the test base (100) and is provided with a torsion assembly (400); the rear end of the torsion assembly (400) is located on the rotatable bearing seat (300) and is provided with a compression assembly (200); the U-shaped loading frame (201) in the compression assembly (200) is connected to a loading plate (204) with a ball joint to apply a compression force to the helicopter bearing (202) along the Y axis; the loading plate (204) with a ball joint is installed on the linear guide rail (405) ) can slide along the Y-axis direction, that is, the compression deformation of the helicopter bearing (202) can be measured by three groups of displacement sensors (203) and averaged. The rotatable bearing seat (300) is fixed to the test base (100) by screws and T-nuts, and the positioning key (301) provides a positioning function. The rotatable bearing seat (300) is composed of a precision locking nut (302), a bearing seat (303), a loading shaft (304), a thrust ball bearing (305), and a deep groove ball bearing (306). The torsion shaft (404) in the torsion assembly (400) rotates around the Y-axis. The torsion shaft (404) is connected to the helicopter bearing (202) and the loading shaft (304), and the angle deformation caused by the torsion is transmitted to the angle encoder (401) through the coupling. The angle encoder (401) is fixed on the bracket (402). The loading plate (204) with a ball joint is installed on the linear guide (405). The linear guide (405) is installed on the torsion support seat (407). The linear guide (405) is limited by the limit block (406). The torsion support seat (407) is installed on the test base (100) through screws and T-nuts and provides torsion. The invention relates to a test base (100) and a test base (100). The test base (100) is provided with a moment support and a positioning key (301). After the compression assembly (200), the rotatable bearing seat (300) and the torsion assembly (400) are installed on the test base (100), the U-shaped loading frame (201) in the compression assembly (200) applies a compressive force along the Y axis to achieve the measurement of the compression stiffness of the helicopter bearing (202); the torsion shaft (404) in the torsion assembly (400) is twisted around the Y axis to achieve the measurement of the torsion stiffness of the helicopter bearing (202), and the compression stiffness and torsion stiffness of the helicopter bearing (202) can be measured simultaneously.

2. A bearing compression stiffness and torsional stiffness measuring device according to claim 1, characterized in that: The test base (100) has a T-slot for easy installation and position adjustment of tooling, and a guide groove for easy positioning of tooling.

Images