Vehicle frame type undercarriage in-situ turning load measurement test verification device

Abstract

The invention discloses a vehicle frame type undercarriage in-situ turning moment measurement test verification device which comprises a bottom plate, a vertical module, a torsion module, an undercarriage and a measurement module. The vertical module comprises two triangular supports, a fixed beam, two sliding rails, two sliding blocks, a vertical hydraulic actuator, a loading seat and two connecting pieces; the torsion module comprises a bearing seat, a bearing, a rotating shaft, a torque sensor, two connecting rods and two torsion units, and each torsion unit comprises a fixing frame and a heading hydraulic actuator; the measuring module comprises two mounting plates and 2M measuring units. Each measuring unit comprises a force bearing seat, a six-dimensional force sensor and two flanges. The device can accurately measure the tire load and the torsional moment when the undercarriage turns in situ, is modularized, is easy to maintain and upgrade, can provide stable and reliable measurement data, and reduces the influence of external environmental factors.

Description

Technical Field

[0001] The invention relates to the field of landing gear dynamic tests, and in particular to a frame-type landing gear in-situ turning load measurement test verification device. Background Art

[0002] When large aircraft need to make an emergency turn while taxiing on some narrow runway routes, in order to ensure that the aircraft can turn smoothly and does not go beyond the runway, the aircraft often uses a special maneuver by turning on the spot. When the aircraft turns on the spot, the multi-wheel main landing gear needs to remain stationary and only change direction by deflecting the front landing gear. Although this steering method can significantly improve the maneuverability of the aircraft, since the main landing gear wheels do not rotate, the friction between the tires and the ground will increase sharply, and it also brings challenges to the steering drive torque design.

[0003] Today, existing landing gear in-situ turning moment measurement technologies mostly rely on collecting data during actual flight or ground taxiing tests, which not only consumes a lot of time and resources, but is also easily affected by external environmental conditions, resulting in reduced data accuracy and reliability.

[0004] Therefore, designing an efficient and accurate test verification device for measuring the in-situ turning torque of the frame-type landing gear can not only provide stable measurement data, but also provide an effective theoretical basis for the estimation of the in-situ steering driving torque and load analysis of the landing gear, which has broad application prospects. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a frame-type landing gear in-situ turning moment measurement test verification device in view of the defects involved in the background technology.

[0006] The present invention adopts the following technical solutions to solve the above technical problems: A frame-type landing gear in-situ turning moment measurement test verification device comprises a base plate, a vertical module, a torsion module, a landing gear, and a measurement module; The bottom plate is placed horizontally; The vertical module includes first to second triangular supports, a fixed beam, first to second slide rails, first to second slide blocks, a vertical hydraulic actuator, a loading seat, and first to second connecting members; The first triangular support and the second triangular support are coplanar, their shorter straight sides are fixed on the bottom plate, and their longer straight sides face each other and are perpendicular to the bottom plate; the two ends of the fixed beam are respectively vertically fixed to the upper ends of the longer straight sides of the first triangular support and the second triangular support; The first slide rail is arranged on the longer straight side of the first fixed beam, and the second slide rail is arranged on the longer straight side of the second fixed beam, and the first slide rail and the second slide rail face each other; the first slider and the second slider are arranged on the first slider and the second slider respectively, and both can slide freely; The loading seat is placed horizontally, one end of which is fixedly connected to the first slider via a first connecting member, and the other end of which is fixedly connected to the second slider via a second connecting member; One end of the vertical hydraulic actuator is hinged to the fixed beam, and the other end is hinged to the center of the upper end surface of the loading seat; The torsion module includes a bearing seat, a bearing, a rotating shaft, a torque sensor, first to second connecting rods, and first to second torsion units; The bearing is arranged at the center of the lower end surface of the loading seat through the bearing seat, the outer ring is fixedly connected to the loading seat through the bearing seat, and the inner ring is coaxial with the vertical hydraulic actuator; One end of the rotating shaft is coaxially fixedly connected to the inner ring of the bearing, and the other end is coaxially fixedly connected to one end of the torque sensor; One end of each of the first connecting rod and the second connecting rod is vertically fixed to the rotating shaft, and the first connecting rod and the second connecting rod are collinear; The first torsion unit and the second torsion unit have the same structure and are symmetrically arranged on both sides of the first triangular support, and both include a fixing frame and a heading hydraulic actuator, wherein the fixing frame is fixed to the bottom plate; the heading hydraulic actuator is placed horizontally, and one end is hinged to the fixing frame; The other end of the heading hydraulic actuator of the first torsion unit is hinged to the other end of the first connecting rod, and the other end of the heading hydraulic actuator of the second torsion unit is hinged to the other end of the second connecting rod; The landing gear adopts a frame-type landing gear, including 2M wheels, where M is a natural number greater than or equal to 1; the top end of the oil-gas buffer of the landing gear is coaxially fixedly connected with the other end of the torque sensor; The measurement module includes first and second mounting plates, and 2M measurement units; The first mounting plate and the second mounting plate are arranged in parallel and fixed on the bottom plate below the landing gear; The 2M measuring units have the same structure, and all include a load-bearing seat, a six-dimensional force sensor, a first flange, and a second flange, wherein the load-bearing seat is U-shaped, and includes a load-bearing plate, a first side plate, and a second side plate, and the two ends of the load-bearing plate are respectively vertically fixedly connected to the lower ends of the first side plate and the second side plate, and the upper end surface of the load-bearing plate is provided with a friction layer for simulating a road; one end of the six-dimensional force sensor is fixedly connected to the center of the lower end surface of the load-bearing plate through the first flange, and the other end is fixedly connected to one end of the second flange; The other ends of the second flanges of M measuring units among the 2M measuring units are fixedly connected to the first mounting plate and are evenly and equidistantly arranged on the first mounting plate; the other ends of the second flanges of the other M measuring units are fixedly connected to the second mounting plate and are evenly and equidistantly arranged on the second mounting plate; The bearing plates of the bearing seats of the 2M measuring units and the 2M wheels of the landing gear are offset against each other in a one-to-one correspondence.

[0007] As a further optimization scheme of the frame-type landing gear in-situ turning torque measurement test verification device of the present invention, the friction layer on the upper end surface of the load-bearing plate adopts a steel plate or an aluminum plate with a pattern.

[0008] As a further optimization scheme of the frame-type landing gear in-situ turning torque measurement test verification device of the present invention, M is taken as 3.

[0009] Compared with the prior art, the present invention adopts the above technical solution and has the following technical effects: By using a combination of vertical hydraulic actuators and azimuth hydraulic actuators to apply vertical loads and torsional loads, and a six-dimensional force sensor to test various loads and moments between the wheels and the ground, the moment characteristics of the landing gear when turning in place can be accurately measured. Since the test is carried out in a controlled environment, the present invention can provide more stable and reliable measurement data and reduce the influence of external environmental factors. The device adopts a modular design, which is easy to maintain and upgrade, and improves the flexibility and long-term reliability of the device. The device is designed with components that are easy to install and adjust, such as adjustable flanges, making the entire testing process simpler and easier. The device is equipped with a data acquisition system that can automatically record various parameters during the test and perform data analysis, which facilitates subsequent test result evaluation and design improvements. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a structural schematic diagram of the measurement module in the present invention.

[0011] In the figure, 1-base plate, 2-first triangular support, 3-second triangular support, 4-fixed beam, 5-first slide rail, 6-first slider, 7-second slider, 8-vertical hydraulic actuator, 9-loading seat, 10-first connecting member, 11-second connecting member, 12-bearing seat, 13-rotating shaft, 14-first connecting rod, 15-second connecting rod, 16-fixed frame of first torsion unit, 17-heading hydraulic actuator of first torsion unit, 18-heading hydraulic actuator of second torsion unit, 19-torque sensor, 20-landing gear, 21-measuring module, 22-first mounting plate, 23-second mounting plate, 24-load bearing seat, 25-six-dimensional force sensor, 26-first flange, 27-second flange, 28-friction layer on the upper end surface of the load bearing plate. DETAILED DESCRIPTION

[0012] The technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings: The present invention can be implemented in many different forms and should not be considered to be limited to the embodiments described herein. On the contrary, these embodiments are provided to make this disclosure thorough and complete, and will fully express the scope of the present invention to those skilled in the art. In the accompanying drawings, components are enlarged for clarity.

[0013] like Figure 1 As shown, the present invention discloses a frame-type landing gear in-situ turning moment measurement test verification device, comprising a base plate, a vertical module, a torsion module, a landing gear, and a measurement module; The bottom plate is placed horizontally; The vertical module includes first to second triangular supports, a fixed beam, first to second slide rails, first to second slide blocks, a vertical hydraulic actuator, a loading seat, and first to second connecting members; The first triangular support and the second triangular support are coplanar, their shorter straight sides are fixed on the bottom plate, and their longer straight sides face each other and are perpendicular to the bottom plate; the two ends of the fixed beam are respectively vertically fixed to the upper ends of the longer straight sides of the first triangular support and the second triangular support; The first slide rail is arranged on the longer straight side of the first fixed beam, and the second slide rail is arranged on the longer straight side of the second fixed beam, and the first slide rail and the second slide rail face each other; the first slider and the second slider are arranged on the first slider and the second slider respectively, and both can slide freely; The loading seat is placed horizontally, one end of which is fixedly connected to the first slider via a first connecting member, and the other end of which is fixedly connected to the second slider via a second connecting member; One end of the vertical hydraulic actuator is hinged to the fixed beam, and the other end is hinged to the center of the upper end surface of the loading seat; The torsion module includes a bearing seat, a bearing, a rotating shaft, a torque sensor, first to second connecting rods, and first to second torsion units; The bearing is arranged at the center of the lower end surface of the loading seat through the bearing seat, the outer ring is fixedly connected to the loading seat through the bearing seat, and the inner ring is coaxial with the vertical hydraulic actuator; One end of the rotating shaft is coaxially fixedly connected to the inner ring of the bearing, and the other end is coaxially fixedly connected to one end of the torque sensor; One end of each of the first connecting rod and the second connecting rod is vertically fixed to the rotating shaft, and the first connecting rod and the second connecting rod are collinear; The first torsion unit and the second torsion unit have the same structure and are symmetrically arranged on both sides of the first triangular support, and both include a fixing frame and a heading hydraulic actuator, wherein the fixing frame is fixed to the bottom plate; the heading hydraulic actuator is placed horizontally, and one end is hinged to the fixing frame; The other end of the heading hydraulic actuator of the first torsion unit is hinged to the other end of the first connecting rod, and the other end of the heading hydraulic actuator of the second torsion unit is hinged to the other end of the second connecting rod; The landing gear adopts a frame-type landing gear, including 2M wheels, where M is a natural number greater than or equal to 1; the top end of the oil-gas buffer of the landing gear is coaxially fixedly connected with the other end of the torque sensor; like Figure 2 As shown, the measurement module includes first to second mounting plates and 2M measurement units; The first mounting plate and the second mounting plate are arranged in parallel and fixed on the bottom plate below the landing gear; The 2M measuring units have the same structure, and all include a load-bearing seat, a six-dimensional force sensor, a first flange, and a second flange, wherein the load-bearing seat is U-shaped, and includes a load-bearing plate, a first side plate, and a second side plate, and the two ends of the load-bearing plate are respectively vertically fixedly connected to the lower ends of the first side plate and the second side plate, and the upper end surface of the load-bearing plate is provided with a friction layer for simulating a road; one end of the six-dimensional force sensor is fixedly connected to the center of the lower end surface of the load-bearing plate through the first flange, and the other end is fixedly connected to one end of the second flange; The other ends of the second flanges of M measuring units among the 2M measuring units are fixedly connected to the first mounting plate and are evenly and equidistantly arranged on the first mounting plate; the other ends of the second flanges of the other M measuring units are fixedly connected to the second mounting plate and are evenly and equidistantly arranged on the second mounting plate; The bearing plates of the bearing seats of the 2M measuring units and the 2M wheels of the landing gear are offset against each other in a one-to-one correspondence.

[0014] The M is preferably 3, and the friction layer on the upper end surface of the bearing plate is made of a steel plate or an aluminum plate with a pattern.

[0015] During the test, steel or aluminum plates with patterns of different depths are used to simulate the friction coefficient between different pavements and wheels, and the required vertical loads are applied to the landing gear and wheels through the vertical hydraulic actuators. Two heading hydraulic actuators are used to apply loads in opposite directions to apply turning torque to the landing gear. Various six-dimensional force sensors are used to test parameters such as the vertical load, heading load, lateral load and torsional moment between each wheel and the ground.

[0016] It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as generally understood by those skilled in the art in the art to which the present invention belongs. It should also be understood that terms such as those defined in common dictionaries should be understood to have meanings consistent with the meanings in the context of the prior art, and will not be interpreted with idealized or overly formal meanings unless defined as herein.

[0017] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A frame-type landing gear in-situ turning moment measurement test verification device, characterized in that: It includes the base plate, vertical module, torsion module, landing gear, and measurement module; The bottom plate is placed horizontally; The vertical module includes first to second triangular supports, a fixed beam, first to second slide rails, first to second slide blocks, a vertical hydraulic actuator, a loading seat, and first to second connecting members; The first triangular support and the second triangular support are coplanar, their shorter straight sides are fixed on the bottom plate, and their longer straight sides face each other and are perpendicular to the bottom plate; the two ends of the fixed beam are respectively vertically fixed to the upper ends of the longer straight sides of the first triangular support and the second triangular support; The first slide rail is arranged on the longer straight side of the first fixed beam, and the second slide rail is arranged on the longer straight side of the second fixed beam, and the first slide rail and the second slide rail face each other; the first slider and the second slider are arranged on the first slider and the second slider respectively, and both can slide freely; The loading seat is placed horizontally, one end of which is fixedly connected to the first slider via a first connecting member, and the other end of which is fixedly connected to the second slider via a second connecting member; One end of the vertical hydraulic actuator is hinged to the fixed beam, and the other end is hinged to the center of the upper end surface of the loading seat; The torsion module includes a bearing seat, a bearing, a rotating shaft, a torque sensor, first to second connecting rods, and first to second torsion units; The bearing is arranged at the center of the lower end surface of the loading seat through the bearing seat, the outer ring is fixedly connected to the loading seat through the bearing seat, and the inner ring is coaxial with the vertical hydraulic actuator; One end of the rotating shaft is coaxially fixedly connected to the inner ring of the bearing, and the other end is coaxially fixedly connected to one end of the torque sensor; One end of each of the first connecting rod and the second connecting rod is vertically fixed to the rotating shaft, and the first connecting rod and the second connecting rod are collinear; The first torsion unit and the second torsion unit have the same structure and are symmetrically arranged on both sides of the first triangular support, and both include a fixing frame and a heading hydraulic actuator, wherein the fixing frame is fixed to the bottom plate; the heading hydraulic actuator is placed horizontally, and one end is hinged to the fixing frame; The other end of the heading hydraulic actuator of the first torsion unit is hinged to the other end of the first connecting rod, and the other end of the heading hydraulic actuator of the second torsion unit is hinged to the other end of the second connecting rod; The landing gear adopts a frame-type landing gear, including 2M wheels, where M is a natural number greater than or equal to 1; the top end of the oil-gas buffer of the landing gear is coaxially fixedly connected with the other end of the torque sensor; The measurement module includes first and second mounting plates, and 2M measurement units; The first mounting plate and the second mounting plate are arranged in parallel and fixed on the bottom plate below the landing gear; The 2M measuring units have the same structure, and all include a load-bearing seat, a six-dimensional force sensor, a first flange, and a second flange, wherein the load-bearing seat is U-shaped, and includes a load-bearing plate, a first side plate, and a second side plate, and the two ends of the load-bearing plate are respectively vertically fixedly connected to the lower ends of the first side plate and the second side plate, and the upper end surface of the load-bearing plate is provided with a friction layer for simulating a road; one end of the six-dimensional force sensor is fixedly connected to the center of the lower end surface of the load-bearing plate through the first flange, and the other end is fixedly connected to one end of the second flange; The other ends of the second flanges of M measuring units among the 2M measuring units are fixedly connected to the first mounting plate and are evenly and equidistantly arranged on the first mounting plate; the other ends of the second flanges of the other M measuring units are fixedly connected to the second mounting plate and are evenly and equidistantly arranged on the second mounting plate; The bearing plates of the bearing seats of the 2M measuring units and the 2M wheels of the landing gear are offset against each other in a one-to-one correspondence.

2. The frame-type landing gear in-situ turning moment measurement test verification device according to claim 1, characterized in that: The friction layer on the upper end surface of the bearing plate is made of a steel plate or an aluminum plate with patterns.

3. The frame-type landing gear in-situ turning moment measurement test verification device according to claim 1, characterized in that: M is 3.

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