Small engine multidirectional thrust measuring device

Abstract

A multi-directional thrust measuring device for a small engine comprises a base, a polished rod, two hoops and a thrust sensor, and one end of the base is upwards and vertically bent to form a vertical plate; the number of the polished rods is two, the polished rods are fixed to the base side by side, and the two ends of each polished rod are each connected with a sliding block in a sliding mode. The two hoops coaxially sleeve two ends of a to-be-tested engine and are used for supporting the to-be-tested engine from two ends; the hoop is fixedly connected with the two sliding blocks at the same end; the thrust sensor is used for measuring thrust of a to-be-tested engine after ignition, and during testing, one end of the thrust sensor is fixed with the vertical plate at one end of the base, and the other end of the thrust sensor abuts against the center of one end of the to-be-tested engine through the adapter. The device is small in frictional resistance, can accurately measure tiny thrust, can change the installation direction of the device, and measures the thrust of an engine when the engine works in different directions.

Description

TECHNICAL FIELD

[0001] The utility model relates to a thrust detection device, specifically, relate to a small -size engine multidirectional thrust measuring device. BACKGROUND

[0002] Engine is a disposable product, and ground test experiment is the key link of verifying whether the engine satisfies acceptance index. Compared with flight test, engine ground test experiment has the advantages such as short preparation time, multiple detectable items, and has the vital role to the early design and performance verification of engine. Thrust measuring device is an important facility of ground test experiment, and has significant influence on the accuracy of test result.

[0003] Small -size engine has wide application in aircraft attitude control, orbit transfer and position keeping, and accurate measurement of microthrust is an important prerequisite for small -size engine design and verification. The traditional thrust measurement method only measures the thrust of engine horizontally placed, and there is difference with the real attitude in flight process, so multidirectional measurement of the thrust of engine is required to eliminate the influence of measurement method on microthrust.

[0004] The existing thrust measuring device has center frame type and flexible test frame type, and these devices can conveniently measure the thrust of large -size engine of different sizes, and the thrust eccentricity is prone to appear when measuring the thrust of small -size engine, and only the thrust in horizontal direction can be measured. Therefore, in order to meet the experimental demand of small -size engine, a multidirectional thrust measuring device for small -size engine is required. SUMMARY

[0005] The utility model discloses a small -size engine multidirectional thrust measuring device, which has small frictional resistance, can accurately measure microthrust, and can change the installation direction of the device to measure the thrust of engine working in different directions.

[0006] To achieve the above object, the utility model adopts the technical scheme as follows: a small -size engine multidirectional thrust measuring device, comprising:

[0007] The base is vertically bent upwards at one end to have a vertical plate;

[0008] The light rod is two and is fixed side by side on the base, and each light rod is slidably connected with a sliding block at both ends;

[0009] Two clamps are coaxially sleeved on both ends of the engine to be measured for supporting the engine to be measured from both ends, and the clamps are fixedly connected with the two sliding blocks at the same end.

[0010] and a thrust sensor for measuring the thrust after the engine to be tested is ignited, wherein during testing, one end of the thrust sensor is fixed with the vertical plate of one end of the base, and the other end is in abutment with the center of one end of the engine to be tested through the adapter.

[0011] The base and the vertical plate are provided with a plurality of mounting holes for facilitating alignment and installation with the test bench.

[0012] The base is vertically provided with a plurality of support plates arranged side by side, and the support plates are provided with light pole fixing blocks at both ends for fixing the two light poles.

[0013] The support plates are provided with a gap in the middle for accommodating the engine to be tested.

[0014] The outer wall of the clamp is provided with a plurality of threaded holes, and the threaded holes are provided with bolts that can abut against the engine to be tested at the top end.

[0015] The vertical plate and the base are provided with triangular reinforcing plates arranged side by side.

[0016] Compared with the prior art, the present utility model has the following advantages:

[0017] a) The present utility model has a simple structure, a small number of components, and is easy to install and maintain;

[0018] b) The present utility model has high reliability and can stably measure the thrust;

[0019] c) The present utility model can accurately measure the thrust of a small engine from multiple directions, improving the comprehensiveness and accuracy of the measurement;

[0020] d) The present utility model has a wide range of applications and is suitable for thrust testing of various small engines. BRIEF DESCRIPTION OF DRAWINGS

[0021] The present utility model will be further described below in conjunction with the drawings and examples.

[0022] Figure 1 is a structural schematic diagram of the present utility model;

[0023] Figure 2 is an installation schematic diagram of the present utility model when measuring horizontal thrust;

[0024] Figure 3 is an installation schematic diagram of the present utility model when measuring vertical thrust;

[0025] In the figure: 1 - base; 2 - light pole fixing block; 3 - light pole; 4 - sliding block; 5 - clamp; 6 - engine to be tested; 7 - adapter; 8 - thrust sensor; 9 - test bench. DETAILED DESCRIPTION

[0026] In order for those skilled in the art to better understand the utility model, the utility model will be further described in detail below in combination with the drawings and specific embodiments.

[0027] Referring to Figure 1 The small engine multidirectional thrust measuring device of the embodiment comprises a base 1, a light pole 3, a light pole fixing block 2, a sliding block 4, a clamp 5, a thrust sensor 8 and an adapter 7. The three light pole fixing blocks 2 are in one group, and there are two groups in total. The three light pole fixing blocks 2 of the two groups are separately mounted on the two ends of the support plate on the base 1. The three light pole fixing blocks in the same group are arranged side by side, and the two groups are parallel to each other. Two light poles pass through the two groups of light pole fixing blocks respectively, ensuring firm installation and mutual parallelism. The four sliding blocks 4 are in two groups respectively. The two clamps 5 are fixed on the two sliding blocks 4 on the same side, ensuring coaxiality with the light pole 3. The two clamps 5 are coaxially sleeved on the two ends of the engine 6 to be measured, and are used for supporting the engine 6 to be measured from both ends. A plurality of threaded holes are arranged on the outer wall of the clamp 5, and a bolt capable of abutting against the test product 6 at the top end is arranged in the threaded hole. The side of the base 1 is vertically bent upwards to form a vertical plate. A plurality of mounting holes are formed on the base 1 and the vertical plate to facilitate alignment and installation with the test bench 9. A triangular reinforcing plate is arranged between the vertical plate and the base 1. The thrust sensor is arranged on the vertical plate, and the adapter 7 is arranged on the other side of the thrust sensor. During testing, one end of the thrust sensor 8 is fixed on the vertical plate of one end of the base 1, and the other end abuts against the center of one end of the engine 6 to be measured through the adapter 7.

[0028] Referring to Figure 1 When the engine 6 to be measured is installed, the engine 6 to be measured passes through the two clamps and is fixed by using the bolt. By adjusting the length of the bolt, it is ensured that the engine and the light pole are parallel, and the axis of the engine and the axis of the thrust sensor are aligned. After installation is completed, the engine can slide on the light pole together with the clamps and the sliding blocks. Before testing, the engine 6 to be measured should be in close contact with the adapter, so as to ensure that the thrust sensor can accurately measure the thrust.

[0029] In order to simulate the thrust of the engine in the actual working state, the installation mode of the base on the test bench can be changed to measure the thrust of the engine in different working directions.

[0030] Referring to Figure 2 When the thrust of the horizontally placed engine is measured, the device is fixed on the test bench by using the bolt through the through hole in the bottom surface of the base 1. The engine is pushed to move together with the sliding blocks and abut against the adapter. After the engine is ignited, the thrust is transmitted to the adapter and then to the thrust sensor.

[0031] Referring to Figure 3When measuring the thrust of a vertically positioned engine, the device is secured to the test bench using bolts through through holes in the side plate of the base. Under gravity, the engine presses firmly against the adapter. After engine ignition, the engine presses against the adapter and transmits the thrust to the thrust sensor.

[0032] Alternatively, the installation angle of the test bench can be changed, the base can be fixed on the test bench, the engine can be pushed to move with the slider and press against the adapter, after ignition the engine presses against the adapter, and the thrust can be measured by the thrust sensor to obtain the thrust provided by the engine when it is working at that angle.

Claims

1. A multi-directional thrust measuring device for a small engine, characterized in that, include: The base (1) has a vertically bent plate at one end; Two light rods (3) are fixed side by side on the base (1), and each light rod (3) has a slider (4) slidably connected to both ends; Two clamps (5) are coaxially sleeved on both ends of the engine to be tested (6) to support the engine to be tested (6) from both ends; the clamps (5) are fixedly connected to two sliders (4) at the same end; The thrust sensor (8) is used to measure the thrust of the engine under test (6) after ignition. During the test, one end of the thrust sensor (8) is fixed to one end of the base (1) and the other end is connected to the center of one end of the engine under test (6) via the adapter (7).

2. The multi-directional thrust measuring device for a small engine according to claim 1, characterized in that, The base (1) and the upright plate have several mounting holes for easy alignment and installation with the test bench (9).

3. A multi-directional thrust measuring device for a small engine according to claim 1 or 2, characterized in that, Multiple side-by-side support plates are erected on the base (1), and optical rod fixing blocks (2) for fixing the two optical rods (3) are installed at both ends of the support plates.

4. The multi-directional thrust measuring device for a small engine according to claim 3, characterized in that, The support plate has a notch in the middle to allow space for the engine (6) to be tested.

5. A multi-directional thrust measuring device for a small engine according to claim 1, characterized in that, The outer wall of the clamp (5) is circumferentially covered with multiple threaded through holes, and bolts that can abut against the engine (6) under test are installed in the threaded through holes.

6. The multi-directional thrust measuring device for a small engine according to claim 1, characterized in that, A pair of triangular reinforcing plates are provided between the upright plate and the base (1).

Images