Aviation piston engine and propeller combined ground bench test device

Abstract

The utility model discloses an aviation piston engine and propeller combined ground bench test device, which comprises a test bench, an adapter bracket, a movable frame and a foldable static frame. A main body of the test bed is made of stainless steel profiles, and independent universal wheels and universal supporting legs are arranged at the bottom of the test bed; the adapter bracket can be matched according to engines of different models; the movable frame is provided with an equipment placing layer which can be used for measuring pulling force and torque of an engine and a propeller. The foldable static frame is mainly used for placing a counter weight and can be folded during transportation, so that a book is convenient to transport. The engine and propeller test bench has the characteristics of high reliability and wide application range, and overcomes the defects that the existing engine and propeller test bench is not universally designed and cannot meet the requirements of testing push-pull force and torque of engines and propellers of different models at the same time.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of engine, propeller ground bench test, more particularly to an aviation piston engine, propeller combined ground bench test device. BACKGROUND

[0002] With the development of navigation technology and "low altitude economy", the unmanned aerial vehicle industry has become a star in high-tech enterprises. Unmanned aerial vehicles not only can be used as a new type of information acquisition carrier, but also inject new vitality into low-altitude economy. They have the advantages of high mobility, operability and adaptability to operating environment, and are increasingly used in various industries.

[0003] As the core professional part of unmanned aerial vehicles, power limits the use of unmanned aerial vehicles in many ways. At present, the power source of large unmanned aerial vehicles is mainly piston engines and propellers. Before the engine and propeller are installed, the control logic, mechanical interface, thrust and pull force, torque test, propeller-engine matching, ground operation and cross-linking work with related on-board equipment, such as fuel and heat dissipation, need to be verified through ground tests. Therefore, an engine and propeller combined ground test bench needs to be designed and manufactured.

[0004] Most of the existing various engine and propeller test benches are special-purpose benches that have not been designed for general use and cannot simultaneously meet the testing of thrust and pull force, torque and other functions, greatly increasing the manufacturing cost of the main machine factory. With the development and maturity of aviation piston engines, there are more and more types of engines on the market, which makes unmanned aerial vehicle design engineers need to design different benches to adapt to different types of engines, resulting in high repetitive work, high labor intensity, and a waste of a large amount of manpower, material resources and financial resources. The existing test benches have poor transportation performance and can basically only be used for testing at fixed locations.

[0005] Therefore, it is necessary to provide a new engine and propeller combined ground test device to solve the above technical problems. SUMMARY

[0006] The utility model aims at providing a wide adaptability, convenient transportation and convenient to use aviation piston engine, propeller combined ground bench test device.

[0007] The technical solution of the utility model is: a movable and multipurpose propeller-engine joint test bench mainly comprising: a test bench mainly used for installing engines, propellers and accessory equipment; an adapter support mainly used for adapting different types of engines and installing engine covers of different structures; a movable frame mainly used for measuring the pull force and torque of the engine and propeller; and a foldable static frame mainly used for placing counterweights, which can be folded up for transportation.

[0008] The test bench is equipped with four independent casters, allowing for free movement and good maneuverability. The main body of the bench is made of stainless steel, resulting in a short manufacturing cycle, low production cost, and high reliability, while ensuring it will not be corroded or damaged during long-term outdoor use. Ten omnidirectional support legs are installed at the bottom of the bench, allowing it to automatically level itself on uneven surfaces, providing flexibility in site selection and functioning as a screw lift. The main body of the bench includes a moving frame and a stationary frame. The moving frame is equipped with tension sensors and torque measuring devices, and has a layer for placing equipment. The engine's control equipment and external communication equipment are placed behind the engine, without affecting the airflow behind the propeller, thus closely simulating the real-world conditions of the power system installed on the drone. The stationary frame is completely unsupported, similarly not affecting the airflow below the propeller or the exhaust flow in the engine compartment. Lifting lugs are arranged around the main beam of the bench, including upper and lower layers. The upper layer is mainly used for securing the equipment during transportation and for auxiliary fixation during testing, while the lower layer is mainly used for hoisting and auxiliary fixation during testing. A deflector is installed on the windward main beam of the bench to prevent interference with the airflow around the propeller.

[0009] The aforementioned adapter bracket can be adapted to different engine models. The adapter bracket is made from modified rack products, which has advantages such as simple manufacturing process, short cycle and low cost. The adapter bracket is fixed to the engine bracket and the platform by screw connection, which is convenient for disassembly and installation.

[0010] The advantages of this utility model compared with the prior art are as follows:

[0011] 1. The ground test bench for aero-piston engines and propellers is highly intelligent, has a simple mechanical structure, high reliability, wide applicability, convenient transportation, and is easy to use;

[0012] 2. The ground test bench for combined aircraft piston engines and propellers can measure the system's thrust and pull forces;

[0013] 3. The ground test bench for combined aircraft piston engines and propellers can measure engine torque;

[0014] 4. The ground test bench for aircraft piston engines and propellers can be adapted to the engine cowling in the actual installation state to simulate the actual installation state for heat dissipation tests.

[0015] 5. The frame adapter bracket is fixed by screw connection, which is convenient for disassembly and installation. It is made by modifying the shelf product, which is simple in manufacturing process, short in cycle and low in finished product cost. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the test bench of this utility model;

[0017] Figure 2This is a side view of the overall test bench of this utility model;

[0018] Figure 3 This is a partially enlarged schematic diagram of the push-pull force sensor;

[0019] Figure 4 This is a schematic diagram of a torque measuring device;

[0020] Figure 5 This is a partially enlarged schematic diagram of the flow guiding device.

[0021] The following are the markings and corresponding component names in the attached diagram: 100, Test bench; 1, Foldable stationary frame; 2, Casters; 3, Universal support feet; 4, Stationary frame body; 5, Adapter bracket; 6, Moving frame body; 7, Moving frame rotation center; 8, Push-pull force sensor; 9, Torque measuring device; 10, Flow guide device; 11, Lifting lug. Detailed Implementation

[0022] The present invention will be further explained and described below with reference to the accompanying drawings and specific embodiments. However, the present invention is not limited to these embodiments, and any improvements or substitutions based on these embodiments shall still fall within the scope of protection claimed by the claims of the present invention.

[0023] During use, the engine and propeller of this test apparatus need to be mounted on the test bench 100. The engine and propeller are integrated and connected to the adapter bracket 5 via bolts. The adapter bracket 5 is also bolted to the main body of the test bench 4, facilitating disassembly and maintenance. The adapter bracket 5 can be adapted to different engine models, exhibiting broad versatility. The engine end face mounted on the moving frame main body 6 can be adapted to different engine cowling structures, facilitating comparisons of the effects of different engine cowling structures on airflow and providing parameter support for aircraft design. When adjusting the test site, the apparatus can be moved freely using the casters 2. Once a suitable test site is reached, the universal support legs 3 are raised, and the height of the six universal support legs 3 is adjusted using a leveling instrument. Leveling is possible even on uneven ground, and the apparatus can be adjusted to the required angle to simulate common flight attitudes. During testing, the apparatus is further secured using the lifting lugs 11, increasing the safety of the test bench. When long-distance transport of the test bench is required, it can be hoisted using the lifting lugs 11. The foldable stationary frame 1 can be flipped onto the main frame and secured for easy transport. During the test, the thrust and pull forces of the engine and propeller can be measured using the thrust-pull force sensor 8, providing parameter support for aircraft design. Engine torque can be measured using the torque measuring device 9.

[0024] The test bench 100 has space at the top for equipment placement. Equipment placement can be adjusted according to actual conditions and can be secured to the bench with bolts / screws to prevent it from falling during testing and posing a safety hazard. The lower part also has space for equipment placement. When the tested propeller is no larger than 80 inches, some equipment required for the test can be placed without affecting the airflow behind the propeller, allowing for a realistic simulation of actual conditions. When the tested propeller is larger than 80 inches, large equipment should not be placed to prevent affecting the airflow behind the propeller and compromising the accuracy of the test. The airflow guide device 10 reduces the impact of the airflow around the propeller.

Claims

1. A ground test bench for a combined aircraft piston engine and propeller, characterized in that... The test bench includes a test bench (100), which includes a foldable stationary frame (1), casters (2), universal support feet (3), stationary frame body (4), adapter bracket (5), moving frame body (6), moving frame rotation center (7), push-pull force sensor (8), torque measuring device (9), flow guiding device (10), and lifting lug (11).

2. The ground test bench apparatus for aero-piston engines and propellers according to claim 1, characterized in that, The adapter bracket (5) is fixed to the test bench (100) and the engine bracket by bolt connection.

3. The ground test bench for aero-piston engines and propellers according to claim 1, characterized in that, The test bench (100) is made of stainless steel profile and has four independent casters (2) and ten casters (3) installed at the bottom.

4. The ground test bench apparatus for aero-piston engines and propellers according to claim 1, characterized in that, The moving frame body (6) is equipped with a push-pull force sensor (8) and a torque measuring device (9), and has a layer for placing equipment.

5. The ground test bench apparatus for aero-piston engines and propellers according to claim 1, characterized in that, The foldable static frame (1) can be flipped and folded onto the main body (4).

6. The ground test bench apparatus for aero-piston engines and propellers according to claim 1, characterized in that, The static frame body (4) is located below the dynamic frame body (6), and the two are connected by stainless steel profiles.

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