Test bed engine mounting rack, rack system and test method

Abstract

The invention relates to the technical field of paddle platform engine testing, in particular to a test bed engine mounting rack, a test bed system and a test method. A test bed engine mounting rack comprises a main mounting plate provided with a first accommodating space; the auxiliary mounting plate and the main mounting plate are arranged in a spaced mode, the auxiliary mounting plate is provided with a second containing space, and the auxiliary mounting plate is suitable for being fixedly connected with a fixed rack; the main pull rod assembly is arranged between the auxiliary mounting plate and the main mounting plate, the first containing space and the second containing space are suitable for fixing a paddle platform engine, and a propeller is arranged at the end, away from the auxiliary mounting plate, of the paddle platform engine. The invention aims to solve the technical problems that a rack system in the prior art is not of a cantilever type structure, the real use environment of a paddle table engine cannot be simulated, and a generated test result is not accurate enough, and provides a test bed engine mounting rack, a rack system and a test method.

Description

Technical Field

[0001] The present invention relates to the technical field of propeller platform engine testing, and in particular to a test bench engine mounting frame, a test bench system and a testing method. Background Art

[0002] With the progress of scientific research, simulation of aircraft installation and testing is an important scientific research project in ground bench testing. The relevant test contents of turboprop engines are stipulated in the General Specifications for Aviation Turboprop and Turboshaft Engines (GJB242A).

[0003] During the propeller platform engine test, the engine mounting frame is fixed to the test bench system in a cantilever manner. At the same time, the mounting frame is in a flow field environment with large flow and high velocity. The noise can reach 160dB, and the load needs to be transferred to the test bench system. The propeller airflow has a large flow rate and a high velocity. The secondary airflow induced by the high-speed propeller flow will cause the air velocity flowing through the test room to be relatively large. The high air flow may also cause the airflow distortion at the front end of the propeller, which may cause the mounting frame to be overloaded. The test bench system is not only an important component of the propeller platform ground test bench, but may also have a certain impact on the propeller flow exhaust. Therefore, in order to ensure a reasonable distance between the propeller and the test bench system, the engine and propeller are often fixed to the test bench system in a cantilever manner during design. The existing test bench system is not a cantilever structure and cannot simulate the actual use environment of the propeller platform engine. The test results produced are not accurate enough, which affects the test results. Summary of the invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defects in the prior art that the test bench system is not a cantilever structure, cannot simulate the actual use environment of the propeller engine, and the test results generated are not accurate enough, which affects the test results, thereby providing a test bench engine mounting frame, a test bench system and a testing method.

[0005] In order to solve the above problems, the present invention provides a test bench engine mounting bracket, comprising:

[0006] A main mounting plate, wherein the main mounting plate is provided with a first accommodating space;

[0007] An auxiliary mounting plate, the auxiliary mounting plate is spaced apart from the main mounting plate, the auxiliary mounting plate is provided with a second accommodating space, and the auxiliary mounting plate is suitable for being fixedly connected to a fixed stand;

[0008] A main tie rod assembly is arranged between the auxiliary mounting plate and the main mounting plate. The main tie rod assembly is connected to the auxiliary mounting plate and the main mounting plate respectively. The first accommodating space and the second accommodating space are suitable for fixing a propeller engine. A propeller is provided at one end of the propeller engine away from the auxiliary mounting plate.

[0009] Optionally, the main tie rod assembly includes a space angle base and a connecting tie rod, both ends of the connecting tie rod are respectively fixedly connected to a space angle base, and the space angle base is fixedly connected to the main mounting plate or the auxiliary mounting plate.

[0010] Optionally, an adjustment rod is further included, one end of which is fixedly connected to the space angle base, and the other end of which is fixedly connected to the space angle base via a joint bearing.

[0011] Optionally, there are two connecting rods, and one adjusting rod. Adjacent connecting rods are arranged at an angle, and adjacent connecting rods and adjusting rods are arranged at an angle.

[0012] Optionally, at least one shock absorbing package is further included, wherein the shock absorbing package is arranged on the side of the main mounting plate facing away from the main tie rod assembly, and the shock absorbing package is suitable for being connected to the paddle platform engine.

[0013] Optionally, it also includes a stand connecting plate, which is arranged on the side of the auxiliary mounting plate away from the main mounting plate, and an auxiliary rod assembly is provided between the stand connecting plate and the auxiliary mounting plate, and the stand connecting plate is suitable for being fixedly connected to the fixed stand by bolts.

[0014] Optionally, the auxiliary rod assembly includes a space angle base, an adjustment rod and a fixed rod, both ends of the connecting rod are respectively fixedly connected to a space angle base, one end of the adjustment rod is fixedly connected to the space angle base, the other end of the adjustment rod is fixedly connected to the space angle base via a joint bearing, and the space angle base is fixedly connected to the main mounting plate or the auxiliary mounting plate.

[0015] Optionally, the main mounting plate, auxiliary mounting plate and stand connecting plate are "U"-shaped plates, the main mounting plate and the auxiliary mounting plate form a first central axis, the auxiliary mounting plate and the stand connecting plate form a second central axis, and the first central axis and the second central axis are set at an angle.

[0016] A test bench system comprises the above-mentioned test bench engine mounting frame.

[0017] Optionally, it further includes a fixed stand, wherein the fixed stand is fixedly connected to the stand connecting plate, and the fixed stand is fixedly connected to the ground.

[0018] A test method for a test bench engine mounting frame. Under the test state, the propeller engine generates torque to the main mounting plate and / or the auxiliary mounting plate, which is then transmitted to the fixed bench by the main mounting plate and / or the auxiliary mounting plate.

[0019] The technical solution of the present invention has the following advantages:

[0020] 1. The engine mounting frame of the test bench provided by the present invention comprises: a main mounting plate, the main mounting plate is provided with a first accommodating space; an auxiliary mounting plate, the auxiliary mounting plate is spaced apart from the main mounting plate, the auxiliary mounting plate is provided with a second accommodating space, and the auxiliary mounting plate is suitable for being fixedly connected to a fixed stand; a main tie rod assembly is arranged between the auxiliary mounting plate and the main mounting plate, the main tie rod assembly is respectively connected to the auxiliary mounting plate and the main mounting plate, the first accommodating space and the second accommodating space are suitable for fixing a propeller engine, and a propeller is provided at one end of the propeller engine away from the auxiliary mounting plate. Under the test state, the propeller engine generates torque to the main mounting plate and / or the auxiliary mounting plate, and then is transmitted to the fixed stand by the main mounting plate and / or the auxiliary mounting plate.

[0021] During the propeller platform engine test, the propeller is started and driven to rotate by the main tie rod assembly, which is respectively fixedly connected to the main mounting plate and the auxiliary mounting plate, and the auxiliary mounting plate is fixedly connected to the fixed test bench, thereby forming a cantilever structure to simulate the actual usage scenario of the propeller platform engine. The torque and force borne are transmitted to the fixed test bench through the main mounting plate, the main tie rod assembly and the auxiliary mounting plate to complete the test, thereby improving the accuracy of the test results.

[0022] 2. The test bench engine mounting bracket provided by the present invention, the main tie rod assembly includes a space angle base and a connecting tie rod, the two ends of the connecting tie rod are respectively fixedly connected to a space angle base, the space angle base is fixedly connected to the main mounting plate or the auxiliary mounting plate, and the connecting tie rod is fixedly connected to the main mounting plate or the auxiliary mounting plate through the space angle base.

[0023] 3. The test bench engine mounting bracket provided by the present invention also includes an adjusting rod, one end of which is fixedly connected to the space angle base, and the other end of which is fixedly connected to the space angle base via a joint bearing. By setting the adjusting rod, fine adjustments can be made between the main mounting plate and the auxiliary mounting plate. In addition, the adjusting rod can also reduce the difficulty of assembly and does not require high-precision assembly during assembly. The gap between the space angle base and the main mounting plate or the auxiliary mounting plate can be adjusted later via the joint bearing.

[0024] 4. The test bench engine mounting bracket provided by the present invention has two connecting rods and one adjusting rod. Adjacent connecting rods are set at an angle, and adjacent connecting rods and adjusting rods are set at an angle, so that the main rod assembly forms a spatial arrangement, and the main rod set in space supports the main mounting plate and the auxiliary mounting plate in space.

[0025] 5. The test bench engine mounting bracket provided by the present invention further includes at least one shock absorbing pack, which is arranged on the side of the main mounting plate away from the main tie rod assembly. The shock absorbing pack is suitable for being connected to the torque compensation device. Through the setting of the shock absorbing pack, it has a shock absorbing effect on the one hand, and a torque transmission effect on the other hand.

[0026] 6. The test bench engine mounting frame provided by the present invention further includes a bench connecting plate, which is arranged on the side of the auxiliary mounting plate away from the main mounting plate, and an auxiliary rod assembly is arranged between the bench connecting plate and the auxiliary mounting plate, and the bench connecting plate is suitable for being fixedly connected to the fixed bench by bolts. The auxiliary rod assembly fixes the bench connecting plate and the auxiliary mounting plate together, and is fixedly connected to the fixed bench through the bench connecting plate.

[0027] 7. The test bench engine mounting frame provided by the present invention, the main mounting plate, the auxiliary mounting plate and the test bench connecting plate are "U"-shaped plates to fix and accommodate the propeller engine, the main mounting plate and the auxiliary mounting plate form a first central axis, the auxiliary mounting plate and the test bench connecting plate form a second central axis, the first central axis and the second central axis are arranged at an angle to adapt to the center height required by different engines (the center height refers to the height of the center axis of the engine from the ground).

[0028] 9. The test bench system provided by the present invention has the advantages described in any of the above items because it adopts the test bench engine mounting frame described in any of the above items.

[0029] 10. The test bench system provided by the present invention also includes a fixed test bench, which is fixedly connected to the test bench connecting plate to achieve fixation and connection with the engine mounting frame of the test bench. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 A schematic diagram of a test bench engine mounting frame provided in an embodiment of the present invention;

[0032] Figure 2 An analysis diagram of the stress on the engine mounting frame of the test bench provided in an embodiment of the present invention during a test;

[0033] Figure 3 A schematic diagram of a main tie rod assembly provided in an embodiment of the present invention;

[0034] Figure 4 A schematic diagram of an auxiliary rod assembly provided in an embodiment of the present invention;

[0035] Figure 5 A schematic diagram of the connection between the adjustment rod, the spherical bearing and the space angle base provided in an embodiment of the present invention;

[0036] Figure 6 A schematic diagram of the connection between the connecting rod and the space angle base provided in an embodiment of the present invention;

[0037] Figure 7 A schematic diagram of the deformation of the main mounting plate in the Y direction provided in an embodiment of the present invention;

[0038] Figure 8 A schematic diagram of the deformation of the main mounting plate in the Z direction provided in an embodiment of the present invention;

[0039] Fig. 9 A schematic diagram of the deformation of the auxiliary mounting plate in the Y direction provided in an embodiment of the present invention;

[0040] Fig.10 It is a schematic diagram of the deformation of the auxiliary mounting plate in the Z direction provided in an embodiment of the present invention.

[0041] Explanation of the accompanying drawings: 1. Main mounting plate; 101. First force transmission point; 102. Second force transmission point; 103. Third force transmission point; 104. First accommodating space; 2. Shock absorber bag; 3. Main pull rod assembly; 301. Connecting rod; 302. Space angle base; 303. Adjusting rod; 304. Joint bearing; 305. Intermediate rod; 4. Auxiliary mounting plate; 401. Fourth force transmission point; 402. Fifth force transmission point; 403. Second accommodating space; 5. Auxiliary rod assembly; 6. Stand connecting plate. DETAILED DESCRIPTION

[0042] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0044] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0046] like Figure 1 A specific embodiment of the test bench engine mounting bracket shown in -6 includes: a main mounting plate 1, an auxiliary mounting plate 4 and a bench connecting plate 6 arranged at intervals, wherein two main tie rod assemblies 3 are arranged between the main mounting plate 1 and the auxiliary mounting plate 4, and an auxiliary rod assembly 5 is arranged between the auxiliary mounting plate 4 and the bench connecting plate 6.

[0047] like Figure 1 As shown, the main mounting plate 1, the auxiliary mounting plate 4 and the stand connecting plate 6 are all "U"-shaped plates, and the space in the "U" shape of the main mounting plate 1 is the first accommodating space 104, the space in the "U" shape of the auxiliary mounting plate 4 is the second accommodating space 403, and the space in the "U" shape of the stand connecting plate 6 is the third accommodating space. The first accommodating space 104, the second accommodating space 403 and the third accommodating space are all suitable for accommodating the paddle engine. It should be noted that the main mounting plate 1 and the paddle engine are connected at three points, that is, the two straight sides of the "U" shape and the connecting sides between the two are connected to the paddle engine, and the auxiliary mounting plate 4 and the paddle engine are connected at two points, that is, the two straight sides of the "U" shape are connected to the paddle engine. The main mounting plate 1 and the auxiliary mounting plate 4 form a first central axis, and the auxiliary mounting plate 4 and the stand connecting plate 6 form a second central axis. The first central axis and the second central axis are set at an angle. It should be noted that the first central axis is composed of a line connecting the center point of the main mounting plate 1 as a "U"-shaped plate in the "U"-shaped space and the center point of the auxiliary mounting plate 4 as a "U"-shaped plate in the "U"-shaped space, and the second central axis is composed of a line connecting the center point of the auxiliary mounting plate 4 as a "U"-shaped plate in the "U"-shaped space and the center point of the stand connecting plate 6 as a "U"-shaped plate in the "U"-shaped space.

[0048] like Figure 1 As shown, each main tie rod assembly 3 and auxiliary tie rod assembly 5 includes a space angle base 302, a connecting tie rod 301 and an adjusting tie rod 303. Figure 1 , Figure 3As shown, a space angle base 302 of a main tie rod assembly 3 is fixedly connected to the main mounting plate 1 or the auxiliary mounting plate 4 by bolts, and two connecting rods 301, or one connecting rod 301, or one adjusting rod 303 extend from each space angle base 302. Figure 3 , Figure 5 As shown, two connecting rods 301 are arranged at an angle, an adjusting rod 303 and an adjacent connecting rod 301 are arranged at an angle, and a joint bearing 304 is arranged between the adjusting rod 303 and the spatial angle base 302, thereby forming a spatial main rod assembly 3. Figure 1 , Figure 3 As shown, the two main tie rod assemblies 3 are symmetrically arranged.

[0049] The length of the connecting rod 301 and the adjusting rod 303 can be designed according to the length of the propeller engine to be tested. Figure 1 , Figure 4 As shown, the auxiliary rod assembly 5 includes six connecting rods 301, two adjusting rods 303 and nine space angle bases 302, that is, each connecting rod 301 and each adjusting rod 303 are provided with a space angle base 302 at both ends, and a joint bearing 304 is provided between the adjusting rod 303 and the space angle base 302, and the space angle base 302 provided with the joint bearing 304 is fixedly connected to the auxiliary mounting plate 4 by bolts. Figure 1 , Figure 4 As shown, the space angle base 302 is fixedly connected to the auxiliary mounting plate 4 by bolts, and is fixedly connected to the countersunk hole of the platform connecting plate 6 by bolts. Figure 1 As shown, three shock absorbing packages 2 are also included. The shock absorbing packages 2 are arranged on the side of the main mounting plate 1 facing away from the main tie rod assembly 3.

[0050] like Figure 1 , Figure 2 As shown, at the first force transmission point 101, the second force transmission point 102 and the third force transmission point 103 of the main mounting plate 1, the fourth force transmission point 401 and the fifth force transmission point 402 of the auxiliary mounting plate 4, the above five force transmission points are the force transmission points of the turboprop engine during the test, that is, the force is transmitted to the main mounting plate 1 or the auxiliary mounting plate 4, and then transmitted to the bench connecting plate 6 through the main tie rod assembly 3 and the auxiliary rod assembly 5, and finally transmitted to the fixed bench, and Figure 2 4 is a force analysis diagram of the first force transmission point 101 to the fifth force transmission point 402. It should be noted that the first force transmission point 101 to the fifth force transmission point 402 are all connecting points between the space angle base 302 and the main mounting plate 1 or the auxiliary mounting plate 4.

[0051] A test bench system includes the above-mentioned test bench engine mounting frame, and also includes a fixed test bench, wherein the fixed test bench is fixedly connected to the test bench connecting plate 6, and the fixed test bench is fixedly connected to the ground.

[0052] During the test, the propeller platform engine (the end of the propeller platform engine facing away from the test bench connecting plate 6 is connected to a propeller, and the propeller will rotate during the test) is first fixedly connected to the main mounting plate 1 and the auxiliary mounting plate 4. After the test starts, the propeller platform engine will generate torque to the main mounting plate 1 and the auxiliary mounting plate 4, which will then be transmitted to the test bench connecting plate 6 through the main pull rod assembly 3 and the auxiliary rod assembly 5, and finally transmitted to the fixed test bench, thereby forming a cantilever structure, that is, the fixed test bench is at the rear and the entire test bench engine mounting frame is cantilevered. The test bench engine mounting frame hoists the propeller platform engine in a structural form, thereby meeting the test requirements of the propeller platform engine. The forces applied to the test bench engine mounting frame during the test are as follows: Figure 2 shown.

[0053] The information of the tested products is shown in Table 1, and the performance data of each material is shown in Table 2:

[0054] Table 1 Materials of the test products

[0055] Test product Material Mounting bracket 30CrMnSiA bolt 30CrMnSiA

[0056] Table 2 30CrMnSiA material performance data

[0057]

[0058] The test conditions include the engine installation state and various engine working states. The test results are as follows: when the engine is running at the maximum state, the maximum stress of all the tie rods measured is 358MPa at the connecting rod 301 located in the middle of the main tie rod assembly 3 (the connecting rod 301 is displaced between a connecting rod 301 and an adjustment rod 303), which meets the design requirements.

[0059] like Figure 7 As shown in FIG. 10, the propeller engine to be tested is used as the test object. Figure 7 and 8 Schematic diagram of the vibration speed of the main mounting plate 1 in the Y direction and the Z direction after the vibration sensor is installed. Fig. 9 and 10 The auxiliary mounting plate 4 after the vibration sensor is installed is respectively arranged in the Y direction and the Z direction (the Y direction is Figure 2 F y Direction, Z direction is Figure 2 F z The schematic diagram of the vibration velocity in the direction of the main mounting plate 1 and the auxiliary mounting plate 4 shows that the design requirements are met. It should be noted that Figure 7 , Figure 8 , Fig. 9 and Fig.10The vertical axis is the vibration amplitude (mm / s), and the horizontal axis is the rotational speed percentage (taking the horizontal axis value of 0.6 as an example, 0.6 represents 60% of the target rotational speed).

[0060] The test bench engine mounting frame provided by the present invention has the following advantages: 1) a cantilever structure is formed by the U-shaped plate of the mounting frame to simulate the installed state of the propeller platform engine, truly simulate the operating state of the propeller platform engine, and improve the accuracy of the test results; 2) the load transfer requirements when the engine is working are met, so that the torque carried by the main mounting plate 1 and the auxiliary mounting plate 4 is transmitted to the fixed frame; 3) the design of the U-shaped plate and the pull rod is conducive to the smooth airflow, and will not produce additional flow resistance to the flow field generated by the rotation of the propeller platform engine; 4) during ground tests, the installation and disassembly of the test bench engine mounting frame is more convenient, and the corresponding size can be selected according to the corresponding propeller platform engine. Except for the need to fix the mounting frame, there is no need to add other support points in the test plant.

[0061] As an alternative implementation, the number of the shock absorbing packs 2 may be 1, 2, 4 or even more.

[0062] As an alternative embodiment, the stand connecting plate 6 and the auxiliary rod assembly 5 may not be provided, and the auxiliary mounting plate 4 may be directly connected to the fixed stand, and the main pull rod assembly 3 may increase the corresponding length, so that the propeller engine generates torque and force to the main mounting plate 1, and then transmitted to the fixed stand by the main mounting plate 1.

[0063] Obviously, the above embodiments are merely examples for clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from them are still within the protection scope of the invention.

Claims

1. A test bench engine mounting bracket, characterized in that: include: A main mounting plate (1), wherein the main mounting plate (1) is provided with a first accommodating space (104); an auxiliary mounting plate (4), the auxiliary mounting plate (4) being spaced apart from the main mounting plate (1), the auxiliary mounting plate (4) being provided with a second accommodating space (403), and the auxiliary mounting plate (4) being suitable for being fixedly connected to a fixed stand; A main tie rod assembly (3) is arranged between the auxiliary mounting plate (4) and the main mounting plate (1), and the main tie rod assembly (3) is connected to the auxiliary mounting plate (4) and the main mounting plate (1) respectively. The first accommodating space (104) and the second accommodating space (403) are suitable for fixing a propeller engine. A propeller is provided at one end of the propeller engine facing away from the auxiliary mounting plate (4).

2. The test bench engine mounting bracket according to claim 1, characterized in that: The main tie rod assembly (3) comprises a space angle base (302) and a connecting tie rod (301), wherein both ends of the connecting tie rod (301) are respectively fixedly connected to a space angle base (302), and the space angle base (302) is fixedly connected to a main mounting plate (1) or an auxiliary mounting plate (4).

3. The test bench engine mounting bracket according to claim 2, characterized in that: It also includes an adjustment rod (303), one end of which is fixedly connected to the space angle base (302), and the other end of which is fixedly connected to the space angle base (302) via a joint bearing (304).

4. The test bench engine mounting bracket according to claim 3, characterized in that: There are two connecting rods (301), one adjusting rod (303), adjacent connecting rods (301) are arranged at an angle, and adjacent connecting rods (301) and adjusting rods (303) are arranged at an angle.

5. The test bench engine mounting bracket according to claim 1, characterized in that: It also includes at least one shock absorbing package (2), which is arranged on the side of the main mounting plate (1) away from the main tie rod assembly (3), and the shock absorbing package (2) is suitable for connecting to the paddle platform engine.

6. The test bench engine mounting bracket according to any one of claims 1 to 5, characterized in that: It also includes a stand connecting plate (6), which is arranged on the side of the auxiliary mounting plate (4) away from the main mounting plate (1), and an auxiliary rod assembly (5) is arranged between the stand connecting plate (6) and the auxiliary mounting plate (4), and the stand connecting plate (6) is suitable for being fixedly connected to the fixed stand by bolts.

7. The test bench engine mounting bracket according to claim 6, characterized in that: The auxiliary rod assembly (5) comprises a space angle base (302), an adjustment rod (303) and a fixed rod; the two ends of the connecting rod (301) are respectively fixedly connected to a space angle base (302); one end of the adjustment rod (303) is fixedly connected to the space angle base (302); the other end of the adjustment rod (303) is fixedly connected to the space angle base (302) via a joint bearing (304); and the space angle base (302) is fixedly connected to the main mounting plate (1) or the auxiliary mounting plate (4).

8. The test bench engine mounting bracket according to claim 7, characterized in that: The main mounting plate (1), the auxiliary mounting plate (4) and the stand connecting plate (6) are "U"-shaped plates; the main mounting plate (1) and the auxiliary mounting plate (4) form a first central axis, and the auxiliary mounting plate (4) and the stand connecting plate (6) form a second central axis; the first central axis and the second central axis are arranged at an angle.

9. A gantry system, characterized in that: The invention comprises the test bench engine mounting bracket as claimed in any one of claims 1 to 8.

10. The gantry system according to claim 9, characterized in that: It also comprises a fixed stand, wherein the fixed stand is fixedly connected to the stand connecting plate (6), and the fixed stand is fixedly connected to the ground.

11. A method for testing a test bench engine mounting bracket, for using the test bench engine mounting bracket according to claim 1, characterized in that: In the test state, the propeller engine generates torque to the main mounting plate (1) and / or the auxiliary mounting plate (4), which is then transmitted to the fixed stand by the main mounting plate (1) and / or the auxiliary mounting plate (4).

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