Engine testing device

Abstract

The invention provides an engine testing device, belongs to the technical field of aviation testing, and aims to solve the technical problem that various blade testing devices are not integrated together in the prior art. Comprising a test cabin, a water tank, a workbench and a telescopic device, an engine is arranged at one end of the test cabin, blades of the engine are located in the test cabin, a heater is arranged on a cabin door of the test cabin, a water pipe communicated with the water tank is arranged on the water tank, and a water pump is arranged on the water pipe; the workbench is located on one side of the test chamber, a guide rail is arranged at the top of the workbench, one end of the guide rail is hinged to the workbench, one end of the telescopic device is hinged to the workbench, the other end of the telescopic device is hinged to the bottom of the guide rail, and an electric sliding rail in sliding fit with the guide rail is arranged on the guide rail and provided with a containing cylinder. According to the invention, the heater, the water tank and the nozzle are arranged, so that the environment of the blade at different temperatures and humidity can be simulated.

Description

Technical Field

[0001] The invention belongs to the technical field of aviation testing, and in particular relates to an engine testing device. Background Art

[0002] Aircraft engines are highly complex and sophisticated thermal machines that provide the power required for aircraft flight. Turbine blades, as an indispensable component of the turbine section of a gas turbine engine, play a vital role. These precisely designed blades are responsible for efficiently drawing high-temperature and high-pressure airflow into the burner, providing a steady stream of power for the continuous operation of the entire engine. It can be said that without the excellent performance of turbine blades, there would be no efficient operation of gas turbine engines.

[0003] However, the working environment of turbine blades is extremely harsh. They need to work stably for a long time in extreme high temperature environments. For example, during the take-off and landing phases of an aircraft, there is a risk of being hit by foreign objects. Under certain conditions, foreign objects such as sand, stones, and birds may hit the fan blades or other key parts at the front of the engine, which will not only have an adverse effect on engine performance, such as increasing fuel consumption and causing vibration, but may also cause serious damage to the engine structure.

[0004] The prior art with the existing patent number CN202122020441.6 discloses an aircraft engine bird strike test device, which is provided with a launch track, an armature mechanism and a bird bomb, and uses the electromagnetic principle to make the armature mechanism accelerate in the launch track, and the armature mechanism pushes the bird bomb to accelerate and fly away from the launch track to hit the blade on the opposite side, so as to achieve the purpose of the blade impact test; In addition, in the prior art, the performance of the blades can be tested by simulating a high temperature and high humidity environment of the blades to achieve the purpose of testing the blades; The prior art has the following deficiencies: 1. In the actual operation of the aircraft, it is very likely that the blades will be hit, subjected to high temperature and smoke environment at the same time. However, the blade impact test, high temperature environment simulation and smoke environment simulation in the prior art are separate experiments and cannot be integrated together. 2. During the actual operation of the aircraft, external impactors may hit the blades from different angles, but in the impact test in the prior art, the launch angle of the birdshot cannot be changed. Summary of the invention

[0005] In view of this, the present invention provides an engine testing device to solve the technical problems in the prior art that blade impact test, high temperature environment simulation and humidity simulation are separate experiments and are not integrated together, and the launch angle of the birdshot cannot be changed during the impact test.

[0006] The technical solution adopted by the present invention is as follows: An engine test device, comprising: A test chamber, wherein an engine is provided at one end of the test chamber, blades of the engine are located in the test chamber, an openable and closable door is provided at one end of the test chamber away from the blades, a heater is provided on the door, and an air outlet end of the heater faces the blades; A water tank, the water tank is located at one side of the test chamber, the water tank is provided with a water pipe connected thereto, the water pipe is provided with a water pump, one end of the water pipe away from the water tank is connected with a nozzle, the nozzle is located in the test chamber, and the water outlet of the nozzle is located between the heater and the blades; A workbench and a telescopic device, wherein the workbench is located at one side of the test cabin and opposite to the cabin door, a guide rail is provided on the top of the workbench, one end of the guide rail is hinged to the workbench, one end of the telescopic device is hinged to the workbench, and the other end is hinged to the bottom of the guide rail, an electric slide rail slidably matched with the guide rail is provided on the guide rail, and a accommodating cylinder for placing an impact object model is provided on the electric slide rail.

[0007] In this technical solution, it should be noted that the engine is a turbofan engine, which is a prior art. Its full name is a turbofan engine. It is a type of aircraft engine. Compared with a turbojet, its main feature is the large area of ​​the first-stage compressor, which is also used as an air propeller (fan) to push part of the inhaled air backwards through the periphery of the jet engine. The turbofan engine is most suitable for use at a flight speed of 400 to 1,000 kilometers, so most aircraft engines now use turbofans as their power source; the blades of the engine can be driven by the engine to rotate; the cabin door adopts a sliding opening and closing cabin door, which can be opened or closed by sliding the cabin door; the heater can adopt an air conditioner, which can blow out hot air, and the heater can cooperate with the temperature sensor in the test cabin to adjust the temperature in the test cabin in real time; the water pump adopts existing technology, which can pressurize the water in the water tank and then spray water mist from the nozzle, and the water pump can cooperate with the humidity sensor in the test cabin to adjust the humidity in the test cabin in real time; the workbench is made of steel, and a universal wheel is provided at the bottom of the workbench, and a brake structure for braking the universal wheel is also provided on the workbench. The brake structure is existing technology and will not be described in detail here; the guide rail is arranged along the length direction of the workbench, the electric slide rail can automatically move on the guide rail, and the telescopic device can be extended or shortened to adjust the angle of the guide rail. In this scheme, the telescopic device is preferably a cylinder. When the present scheme is implemented, the angle of the guide rail is first adjusted according to the test requirements, that is, the angle of the guide rail is changed by extending or contracting the telescopic device, and then the impactor model is loaded into the accommodating cylinder, and then the cabin door is closed, the heater and the water pump are started, the water pump pressurizes the water in the water tank and sprays it between the blade and the heater through the nozzle, and the hot air blown by the heater blows the water mist to the blade, so that the water mist acts on the blade from the front of the blade, so that the blade and the water mist are fully in contact. When the temperature and humidity in the test cabin reach the set value, the cabin door is opened, the electric slide rail performs acceleration movement on the guide rail, driving the impactor model to perform acceleration movement synchronously, and when the moving speed of the electric slide rail reaches the set value, the electric slide rail is turned on and the impactor model is turned on and the impactor model is turned on. The rail is closed, and the impactor model hits the blade in the test chamber at a certain speed through inertia, so as to realize collision simulation tests of the blade under various environments; in summary, in the present invention, the heater, water tank and nozzle are provided, so as to simulate the environment of the blade under different temperatures and humidities, and the guide rail and electric slide rail are provided, so as to drive the impactor model to perform impact test on the blade when the blade reaches the set environmental conditions, so as to make the test more realistic; secondly, in the present invention, the temperature control, humidity control and impact devices can be operated separately or together, and have strong applicability; finally, in the present invention, the angle of the guide rail can be adjusted, so as to realize the test of the impactor model hitting the blade from different angles.

[0008] Preferably, the bottom of the workbench is provided with table legs, and the table legs are retractable.

[0009] In this technical solution, it should be noted that the length of the table legs can be adjusted by a hydraulic cylinder to adjust the height of the workbench. The number of table legs is specifically four, and a universal wheel is provided at the bottom of each table leg. In addition, in this solution, a computer is provided on the top of the workbench to record data.

[0010] Preferably, a storage box is provided at the top of the end of the guide rail away from the test cabin, and a plurality of impactor models are overlapped from top to bottom in the storage box, and a first opening for allowing a single impactor model to enter and exit is penetrated by the end of the storage box facing the accommodating cylinder, and a second opening is penetrated by the end of the storage box opposite to the first opening; a support plate is also provided at the end of the guide rail away from the test cabin, and a first slide groove is provided on the support plate, the first slide groove is arranged horizontally, and a first push rod is slidably embedded in the first slide groove, and the first push rod is opposite to the second opening; a transmission device is also provided on the support plate, and the transmission device can drive and connect the electric slide rail with the first push rod, and when the electric slide rail moves in the direction away from the cabin door, the first push rod is driven by the transmission device to move in the direction close to the second opening, so as to push the bottommost impactor model in the accommodating cylinder out of the first opening.

[0011] In this technical solution, it should be noted that the storage box is vertically arranged, and its top is a feeding port. The storage box is used to store the impactor model, and the width and length of the storage box are equivalent to the width and length of the impactor model. The support plate is fixed to one end of the guide rail by screws. This solution can realize the automatic loading of the impactor model. The specific principle is: when the impactor model needs to be loaded into the accommodating cylinder, the electric slide rail drives the accommodating cylinder to move to the right. When the electric slide rail contacts the transmission device, the electric slide rail will transmit power to the transmission device during the continued movement. The transmission device drives the first push rod to move to the left. During the movement of the first push rod to the left, it penetrates into the storage box from the second opening, and pushes the impactor model at the bottom of the storage box to the left. Since the accommodating cylinder is moving to the right, the impactor model will eventually be pushed into the accommodating cylinder, thereby realizing the automatic loading of the impactor model.

[0012] Preferably, the transmission device includes a second push rod and a second slide groove, the second slide groove is arranged on the support plate and is located below the first slide groove, the second push rod is slidably embedded in the second slide groove, and the second push rod passes through the bottom of the storage box along the direction close to the electric slide rail toward one end of the electric slide rail; the first push rod and the second push rod are respectively provided with a first rack and a second rack, and the support plate is rotatably connected with a gear, and the gear is respectively engaged with the first rack and the second rack located on the upper and lower sides thereof.

[0013] In this technical solution, it should be noted that the transmission device specifically includes a second push rod and a second slide slot, and the second push rod and the second slide slot are both parallel to the first slide slot. In this solution, when it is necessary to load the impactor model into the accommodating cylinder, the electric slide rail drives the accommodating cylinder to move to the right. When the electric slide rail contacts the second push rod, the electric slide rail will transmit power to the second push rod during its continued movement to drive the second push rod to move to the right. After the second push rod moves to the right, it drives the gear meshing with it to rotate counterclockwise through the second rack. After the gear rotates counterclockwise, it drives the top first push rod to move to the left through the first rack. During the process of the first push rod moving to the left, it penetrates into the storage box from the second opening and pushes the impactor model at the bottom of the storage box to the left. Since the accommodating cylinder is moving to the right, the impactor model will eventually be pushed into the accommodating cylinder, thereby realizing automatic loading of the impactor model.

[0014] Preferably, an abutment plate is provided at one end of the second push rod facing the electric slide rail, a first spring is provided on the abutment plate, one end of the first spring away from the baffle is connected to the bottom of the receiving box, and the first spring is sleeved on the second push rod.

[0015] In this technical solution, it should be noted that the cross-sectional area of ​​the abutment plate is larger than the cross-sectional area of ​​the second push rod. The first spring is provided to assist the second push rod in resetting. The resetting of the second push rod will drive the first push rod to reset through the transmission of the gear, so as to prepare for the next loading of the impact object model.

[0016] Preferably, a movable plate is slidably embedded in the bottom of the inner cavity of the containing box, one end of the movable plate extends outside the containing box and is connected to the abutment plate, and a limiting groove matching the shape of the impactor model is provided on the top of the movable plate.

[0017] In this technical solution, it should be noted that the movable plate can move with the movement of the abutting plate. Since the movable plate extends outside the accommodating box, when the impactor model is gradually pushed out of the first opening by the first push rod, the part of the impactor model that leaks out of the storage box will be blocked by the movable plate, which can prevent the impactor model from falling during the filling process, and the limiting groove can limit the two sides of the impactor model, further improving the stability of the impactor model during the filling process.

[0018] Preferably, a shell communicating with the inner cavity of the accommodating tube is provided on the side wall of the accommodating tube, a stopper is provided in the shell, the stopper is connected to the shell via a second spring, one end of the stopper extends into the accommodating tube, and a first guide surface is provided at one end of the stopper facing the accommodating box, the first guide surface is an arc surface, and the end of the stopper away from the first guide surface is a plane.

[0019] In this technical solution, the shell is located at a position near the storage box on the side wall of the accommodating cylinder, and the number of the shells is specifically two, and the two shells are symmetrically arranged; it should be noted that, during the process of the impactor model being accelerated by the electric slide rail, if there is no device on the right side of the accommodating cylinder to limit the impactor model, due to the principle of inertia, the impactor model is likely to fall out of the right side of the accommodating cylinder. Based on this, the present solution is provided with a stopper, and considering the loading process of the impactor model, a first guide surface which is an arc-shaped surface is provided on the stopper, which can limit the right side of the impactor model in the accommodating cylinder, and at the same time will not affect the loading process; the specific principle is: when the impactor model needs to be loaded into the accommodating cylinder, the electric slide rail drives the accommodating cylinder to move to the right, and when the electric slide rail contacts the second push rod, the electric slide rail will transmit power to the second push rod during the continued movement to drive the second push rod to move to the right, and after the second push rod moves to the right, it is driven by the second rack to move with it The meshed gear rotates counterclockwise, and after the gear rotates counterclockwise, it drives the first push rod at the top to move leftward through the first rack. During the movement of the first push rod to the left, it penetrates into the storage box from the second opening, and pushes the impactor model at the bottom of the storage box to the left. Since the accommodating tube is moving to the right, the impactor model will eventually be pushed into the accommodating tube. During the process of the impactor model entering the accommodating tube, the impactor model will first contact the first guide surface of the block. Since the first guide surface is an arc surface, when the first guide surface is pushed leftward by the impactor model, it will disperse the force in the direction toward the shell through the first guide surface, so that the block is gradually compressed into the shell, preventing the block from blocking the loading of the impactor model. After the loading of the impactor model is completed, the impactor model and the block are staggered, and the block is reset by the elastic force of the second spring. At this time, the plane of the block forms a block to the impactor model, preventing the impactor model from falling from the right side of the accommodating tube.

[0020] Preferably, a crossbeam is supported by a bracket above the guide rail, a mounting frame is provided at the bottom of the crossbeam, a baffle is rotatably connected to the bottom of the mounting frame, the bottom of the baffle is lower than the top of the opening of the accommodating cylinder, and the baffle is connected to the mounting frame through a third spring.

[0021] In this technical solution, it should be noted that after the impactor model is loaded, the electric slide rail is in a stationary state waiting to move. If the guide rail is tilted downward at this time (the angle is set according to experimental requirements), the impactor model in the accommodating tube may slide out from the left side of the accommodating tube. Based on this, this solution is provided with a rotatable baffle plate near the storage box on the guide rail. After the impactor model is loaded, the baffle plate is located at the left opening of the accommodating tube, forming a barrier to the impactor model in the accommodating tube. During the impact test, the electric slide rail moves to the left (when the electric slide rail moves at high speed, the impactor model in the accommodating tube will not fall from the left side of the accommodating tube. Only after the electric slide rail is stationary, the impactor model will fly out from the left side of the accommodating tube at high speed due to inertia). The accommodating tube on the electric slide rail will drive the baffle plate to rotate, so that the baffle plate avoids the accommodating tube to prevent motion interference. When the accommodating tube and the baffle plate are completely offset, the baffle plate is reset by the action of the third spring.

[0022] Preferably, a limit rod is provided on the mounting frame, the limit rod is in contact with a side of the baffle plate close to the containing box, the baffle plate includes a fixed plate and a telescopic plate, the fixed plate is rotatably connected to the mounting frame, a cavity is provided in the fixed plate, one end of the telescopic plate is connected to the cavity through a fourth spring, and the other end extends out of the cavity; a second guide surface is provided on the side of the telescopic plate away from the containing box, and the second guide surface is inclined from top to bottom in a direction close to the containing box.

[0023] In this technical solution, it should be noted that, since the baffle can rotate left and right, when the accommodating cylinder needs to be loaded with an impact model, the electric slide rail moves to the right, and at this time, the baffle is rotated to avoid the accommodating cylinder. However, after the accommodating cylinder is loaded, if the distance between the accommodating cylinder and the baffle is too small, the baffle will overlap the top of the accommodating cylinder, that is, the accommodating cylinder will block the rotation and reset of the baffle. Fig.14 As shown, based on this, the present invention provides a limit rod and a telescopic plate. When the electric slide rail drives the accommodating cylinder to move to the right to load the impactor model, the limit rod blocks the baffle plate, so that the baffle plate cannot rotate to the right (cannot rotate counterclockwise). At this time, the telescopic plate is pushed to the right by the accommodating cylinder, and the thrust is dispersed to the vertical direction through the second guide surface, so that the telescopic plate shrinks into the cavity of the fixed plate. When the accommodating cylinder is offset from the telescopic rod, the telescopic plate is reset by the elastic force of the fourth spring, thereby blocking the impactor model in the accommodating cylinder.

[0024] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. In the present invention, the heater, water tank and nozzle are provided to simulate the environment of the blade under different temperatures and humidities, and the guide rail and electric slide rail are provided to drive the impact object model to perform impact test on the blade when the blade reaches the set environmental conditions, making the test more realistic; secondly, in the present invention, the temperature control, humidity control and impact devices can be operated separately or together, and have strong applicability; finally, in the present invention, the angle of the guide rail can be adjusted, so that the impact object model can be tested to hit the blade from different angles.

[0025] 2. In the present invention, when it is necessary to load the impactor model into the accommodating cylinder, the electric slide rail drives the accommodating cylinder to move to the right. When the electric slide rail contacts the transmission device, the electric slide rail transmits power to the transmission device during continued movement, and the transmission device drives the first push rod to move to the left. During the movement of the first push rod to the left, it penetrates into the storage box from the second opening, pushing the impactor model at the bottom of the storage box to the left. Since the accommodating cylinder is moving to the right, the impactor model will eventually be pushed into the accommodating cylinder, thereby realizing automatic loading of the impactor model.

[0026] 3. In the present invention, since the movable plate extends outside the storage box, when the impactor model is gradually pushed out of the first opening by the first push rod, the part of the impactor model leaking out of the storage box will be blocked by the movable plate, which can prevent the impactor model from falling during the filling process, and the limiting groove can limit the two sides of the impactor model, further improving the stability of the impactor model during the filling process.

[0027] 4. In the present invention, a rotatable baffle is provided near the storage box on the guide rail. When the impactor model is loaded, the baffle is located at the left opening of the accommodating cylinder to block the impactor model in the accommodating cylinder. 5. In the present invention, a limit rod and a telescopic plate are provided. When the electric slide rail drives the accommodating cylinder to move to the right to load the impactor model, the limit rod blocks the baffle plate, so that the baffle plate cannot rotate to the right (cannot rotate counterclockwise). At this time, the telescopic plate is pushed to the right by the accommodating cylinder, and the thrust is dispersed to the vertical direction through the second guide surface, so that the telescopic plate shrinks into the cavity of the fixed plate. When the accommodating cylinder is offset from the telescopic rod, the telescopic plate is reset by the elastic force of the fourth spring, thereby blocking the impactor model in the accommodating cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The present invention will now be described by way of example with reference to the accompanying drawings, in which: Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the cross-sectional three-dimensional structure of the test cabin of the present invention; Figure 3It is a three-dimensional structural schematic diagram of the engine of the present invention; Figure 4 It is a schematic diagram of the three-dimensional structure of the workbench of the present invention; Figure 5 It is a schematic diagram of the three-dimensional structure of the guide rail of the present invention; Figure 6 for Figure 5 Schematic diagram of the three-dimensional structure after cutting along AA; Figure 7 for Figure 6 A schematic diagram of a cross-sectional three-dimensional structure; Figure 8 for Figure 7 A schematic diagram of the three-dimensional structure of the impactor model in the middle storage box when a part of it is pushed out; Fig. 9 It is a schematic diagram of the three-dimensional structure of the first push rod, the second push rod and the gear of the present invention; Fig.10 It is a schematic side view of the three-dimensional structure of the electric slide rail of the present invention; Fig.11 It is a three-dimensional structural schematic diagram of the stopper of the present invention; Fig.12 It is a schematic diagram of the three-dimensional structure when the baffle of the present invention limits the left side of the impact object model in the accommodating cylinder; Fig.13 It is a schematic diagram of a cross-sectional three-dimensional structure of the mounting frame and the baffle of the present invention; Fig.14 It is a schematic diagram of the three-dimensional structure after the baffle plate and the mounting tube interfere with each other when no limiting rod is provided on the mounting frame of the present invention.

[0029] In the figure: 1-test cabin, 2-cabin door, 3-heater, 4-water tank, 5-water pipe, 6-water pump, 7-nozzle, 8-blade, 9-engine, 10-workbench, 11-universal wheel, 12-table leg, 13-computer, 20-guide rail, 21-telescopic device, 22-electric slide rail, 30-accommodating cylinder, 31-housing, 32-block, 321-first guide surface, 322-plane, 33-second spring, 40-bracket, 41-beam, 42-mounting frame, 43-baffle, 431- telescopic plate, 432- fixed plate, 433- cavity, 44- limiting rod, 45- third spring, 46- fourth spring, 50- storage box, 51- first opening, 52- second opening, 53- movable plate, 54- limiting groove, 55- first spring, 60- impact object model, 70- support plate, 71- first slide groove, 72- first push rod, 73- first rack, 74- gear, 75- second slide groove, 76- second push rod, 77- second rack, 78- abutment plate. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. 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.

[0032] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features of the embodiments may be combined with each other.

[0033] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0034] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use, or the positions or positional relationships commonly understood by those skilled in the art, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0035] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0037] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features of the embodiments may be combined with each other. Example 1

[0038] like Figure 1-Figure 14 As shown, an engine test device is disclosed in an embodiment of the present invention, comprising: A test chamber 1, wherein an engine 9 is provided at one end of the test chamber 1, and blades 8 of the engine 9 are located in the test chamber 1. An openable and closable door 2 is provided at one end of the test chamber 1 away from the blades 8, and a heater 3 is provided on the door 2, and an air outlet end of the heater 3 faces the blades 8; A water tank 4, the water tank 4 is located at one side of the test chamber 1, the water tank 4 is provided with a water pipe 5 connected thereto, the water pipe 5 is provided with a water pump 6, the end of the water pipe 5 away from the water tank 4 is connected with a nozzle 7, the nozzle 7 is located in the test chamber 1, and the water outlet of the nozzle 7 is located between the heater 3 and the blade 8; A workbench 10 and a telescopic device 21, wherein the workbench 10 is located at one side of the test cabin 1 and opposite to the cabin door 2, a guide rail 20 is provided on the top of the workbench 10, one end of the guide rail 20 is hinged to the workbench 10, one end of the telescopic device 21 is hinged to the workbench 10, and the other end is hinged to the bottom of the guide rail 20, an electric slide rail 22 slidably matched therewith is provided on the guide rail 20, and a accommodating cylinder 30 for placing an impactor model 60 is provided on the electric slide rail 22.

[0039] It should be noted that engine 9 is a turbofan engine, which is a prior art. Its full name is turbofan engine. It is a type of aircraft engine. Compared with turbojets, its main feature is the large area of ​​the first-stage compressor, which is also used as an air propeller (fan) to push part of the inhaled air backward through the periphery of the jet engine. Turbofan engines are most suitable for flight speeds of 400 to 1000 kilometers per hour, so most aircraft engines now use turbofans as a power source; the blades 8 of engine 9 can be driven by engine 9 to achieve rotation; the cabin door 2 adopts a sliding opening and closing cabin door 2, which can be opened or closed by sliding the cabin door 2; the heater 3 can adopt an air conditioner that can blow out hot air, and the heater 3 can cooperate with the temperature sensor in the test cabin 1 to adjust the temperature in the test cabin in real time; the water pump 6 adopts the prior art, which can pressurize the water in the water tank 4 and then spray it out from the nozzle 7 Water mist, and the water pump 6 can cooperate with the humidity sensor in the test cabin 1 to adjust the humidity in the test cabin 1 in real time; the workbench 10 is made of steel, and a universal wheel 11 is arranged at the bottom of the workbench 10, and a brake structure for braking the universal wheel 11 is also provided on the workbench 10. The brake structure is a prior art and will not be described in detail here; the guide rail 20 is arranged along the length direction of the workbench 10, and the electric slide rail 22 can automatically move on the guide rail 20, and the telescopic device 21 can be extended or shortened to adjust the angle of the guide rail 20. In this scheme, the telescopic device 21 is preferably a cylinder. When the present scheme is implemented, the angle of the guide rail 20 is first adjusted according to the test requirements, that is, the telescopic device 21 is extended or contracted to change the angle of the guide rail 20, and then the impactor model 60 is loaded into the accommodating tube 30, and then the hatch 2 is closed, the heater 3 and the water pump 6 are started, and the water pump 6 pressurizes the water in the water tank 4 and sprays it between the blade 8 and the heater 3 through the nozzle 7, and the hot air blown by the heater 3 blows the water mist to the blade 8, so that the water mist acts on the blade 8 from the front of the blade 8, so that the blade 8 is fully in contact with the water mist. When the temperature and humidity in the test chamber 1 reach the set value, the hatch 2 is opened, and the electric slide rail 22 performs acceleration movement on the guide rail 20, driving the impactor model 60 to perform acceleration movement synchronously. When the moving speed of the electric slide rail 22 reaches the set value After that, the electric slide rail 22 is closed, and the impactor model 60 hits the blade 8 in the test chamber 1 at a certain speed through inertia, so as to realize collision simulation tests of the blade 8 under various environments; in summary, in the present invention, the heater 3, the water tank 4 and the nozzle 7 are provided, so as to simulate the environment of the blade 8 under different temperatures and humidities, and the guide rail 20 and the electric slide rail 22 are provided, so as to drive the impactor model 60 to perform impact tests on the blade 8 when the blade 8 reaches the set environmental conditions, so as to make the test more realistic; secondly, in the present invention, the temperature control, humidity control and impact devices can be operated separately or together, and have strong applicability; finally, in the present invention, the angle of the guide rail 20 can be adjusted, so as to realize the test of the impactor model 60 hitting the blade 8 from different angles.

[0040] like Figure 4 As shown, in this embodiment, the bottom of the workbench 10 is provided with table legs 12, and the table legs 12 are retractable. It should be noted that the length of the table legs 12 can be adjusted by a hydraulic cylinder to adjust the height of the workbench 10. The number of the table legs 12 is specifically four, and the bottom of each table leg 12 is provided with a universal wheel 11. In addition, in this solution, a computer 13 is provided on the top of the workbench 10 to record data. Example 2

[0041] like Figure 5-Figure 9 As shown, this embodiment is substantially the same as the above embodiment, except that a storage box 50 is provided at the top of the end of the guide rail 20 away from the test chamber 1, and a plurality of impactor models 60 are overlapped from top to bottom in the storage box 50, and a first opening 51 for a single impactor model 60 to enter and exit is penetrated through the end of the storage box 50 facing the accommodating cylinder 30, and a second opening 52 is penetrated through the end of the storage box 50 opposite to the first opening 51; a support plate 70 is further provided at the end of the guide rail 20 away from the test chamber 1, and a support plate 70 is provided on the support plate 70 A first slide groove 71 is horizontally arranged, and a first push rod 72 is slidably embedded in the first slide groove 71, and the first push rod 72 is opposite to the second opening 52; a transmission device is also provided on the support plate 70, and the transmission device can drive and connect the electric slide rail 22 with the first push rod 72. When the electric slide rail 22 moves in a direction away from the cabin door 2, the first push rod 72 is driven by the transmission device to move in a direction close to the second opening 52, so as to push the impactor model 60 at the bottom of the accommodating tube 30 out of the first opening 51. It should be noted that the storage box 50 is vertically arranged with a feeding port at its top. The storage box 50 is used to store the impactor model 60, and the width and length of the storage box 50 are equivalent to those of the impactor model 60. The support plate 70 is fixed to one end of the guide rail 20 by screws. The present solution can realize the automatic loading of the impactor model 60. The specific principle is as follows: when the impactor model 60 needs to be loaded into the accommodating cylinder 30, the electric slide rail 22 drives the accommodating cylinder 30 to move rightward. When the electric slide rail 22 contacts the transmission device, the electric slide rail 22 transmits power to the transmission device during continued movement, and the transmission device drives the first push rod 72 to move leftward. During the process of the first push rod 72 moving leftward, it penetrates into the storage box 50 from the second opening 52, and pushes the impactor model 60 at the bottom of the storage box 50 to the left. Since the accommodating cylinder 30 is moving rightward, the impactor model 60 will be pushed into the accommodating cylinder 30 in the end, thereby realizing the automatic loading of the impactor model 60.

[0042] like Figure 7-Figure 9As shown, in this embodiment, the transmission device includes a second push rod 76 and a second slide groove 75, the second slide groove 75 is arranged on the support plate 70 and is located below the first slide groove 71, the second push rod 76 is slidably embedded in the second slide groove 75, and the second push rod 76 passes through the bottom of the storage box along the direction close to the electric slide rail 22 toward one end of the electric slide rail 22; the first push rod 72 and the second push rod 76 are respectively provided with a first rack 73 and a second rack 77, and the support plate 70 is rotatably connected with a gear 74, and the gear 74 is respectively engaged with the first rack 73 and the second rack 77 located on the upper and lower sides thereof. It should be noted that the transmission device specifically includes a second push rod 76 and a second slide groove 75, and the second push rod 76 and the second slide groove 75 are parallel to the first slide groove 71. In this solution, when it is necessary to load the impact object model 60 into the accommodating cylinder 30, the electric slide rail 22 drives the accommodating cylinder 30 to move to the right. When the electric slide rail 22 contacts the second push rod 76, the electric slide rail 22 will transmit power to the second push rod 76 during the continued movement, so as to drive the second push rod 76 to move to the right. The second push rod 76 moves to the right. After the movement, the second rack 77 drives the gear 74 meshing with it to rotate counterclockwise. After the gear 74 rotates counterclockwise, the first push rod 72 at the top is driven to move leftward through the first rack 73. During the movement of the first push rod 72 to the left, it penetrates into the storage box 50 from the second opening 52, and pushes the impactor model 60 at the bottom of the storage box 50 to the left. Since the accommodating tube 30 is moving to the right, the impactor model 60 will be pushed into the accommodating tube 30, thereby realizing the automatic loading of the impactor model 60.

[0043] like Figure 7 As shown, in this embodiment, a contact plate 78 is provided at one end of the second push rod 76 facing the electric slide rail 22, and a first spring 55 is provided on the contact plate 78. One end of the first spring 55 away from the baffle 43 is connected to the bottom of the receiving box, and the first spring 55 is sleeved on the second push rod 76. It should be noted that the cross-sectional area of ​​the contact plate 78 is larger than the cross-sectional area of ​​the second push rod 76. The first spring 55 is provided to assist the second push rod 76 in resetting. The resetting of the second push rod 76 will drive the first push rod 72 to reset through the transmission of the gear 74, so as to prepare for the next loading of the impact object model 60.

[0044] like Figure 7 As shown, in this embodiment, a movable plate 53 is slidably embedded in the bottom of the inner cavity of the containing box, one end of the movable plate 53 extends outside the containing box and is connected to the abutment plate 78, and a limiting groove 54 adapted to the shape of the impactor model 60 is provided on the top of the movable plate 53.

[0045] It should be noted that the movable plate 53 can move with the movement of the abutment plate 78. Since the movable plate 53 extends outside the storage box, when the impactor model 60 is gradually pushed out of the first opening 51 by the first push rod 72, the part of the impactor model 60 that leaks out of the storage box 50 will be blocked by the movable plate 53, which can prevent the impactor model 60 from falling during the filling process. The limiting groove 54 can limit the two sides of the impactor model 60, further improving the stability of the impactor model 60 during the filling process. Example 3

[0046] like Fig.10 and Fig.11As shown, this embodiment is substantially the same as the above embodiment, except that a shell 31 communicating with the inner cavity of the accommodating tube 30 is provided on the side wall thereof, a stopper 32 is provided inside the shell 31, the stopper 32 is connected to the shell 31 through a second spring 33, and one end of the stopper 32 extends into the accommodating tube 30, and a first guide surface 321 is provided at one end of the stopper 32 facing the accommodating box, and the first guide surface 321 is an arc surface. The end of the stopper 32 away from the first guide surface 321 is a plane 322. The shell 31 is located at a position near the storage box 50 on the side wall of the accommodating cylinder 30. There are two shells 31, which are symmetrically arranged. It should be noted that when the impactor model 60 is accelerated by the electric slide rail 22, if there is no device on the right side of the accommodating cylinder 30 to limit the impactor model 60, the impactor model 60 is easy to fall out from the right side of the accommodating cylinder 30 due to the principle of inertia. Based on this, the present solution is provided with a stopper 32. Considering the loading process of the impactor model 60, a first arc-shaped surface is provided on the stopper 32. A guide surface 321 can limit the right side of the impact model 60 in the accommodating tube 30 without affecting the loading process; the specific principle is: when the impact model 60 needs to be loaded into the accommodating tube 30, the electric slide rail 22 drives the accommodating tube 30 to move to the right. When the electric slide rail 22 contacts the second push rod 76, the electric slide rail 22 will transmit power to the second push rod 76 during the continued movement to drive the second push rod 76 to move to the right. After the second push rod 76 moves to the right, it drives the gear 74 meshing with it to rotate counterclockwise through the second rack 77, and the gear 74 is rotated counterclockwise. After the wheel 74 rotates counterclockwise, it drives the first push rod 72 at the top to move leftward through the first rack 73. During the movement of the first push rod 72 to the left, it penetrates into the storage box 50 from the second opening 52, and pushes the impactor model 60 at the bottom of the storage box 50 to the left. Since the accommodating tube 30 is moving to the right, the impactor model 60 will eventually be pushed into the accommodating tube 30. During the process of the impactor model 60 entering the accommodating tube 30, the impactor model 60 will first contact the first guide surface 321 of the stopper 32. Since the first guide surface 321 is an arc surface, when After the first guide surface 321 is pushed to the left by the impactor model 60, the force is dispersed toward the housing 31 through the first guide surface 321, so that the stopper 32 is gradually compressed into the housing 31, preventing the stopper 32 from blocking the loading of the impactor model 60. When the loading of the impactor model 60 is completed, the impactor model 60 and the stopper 32 are offset from each other, and the stopper 32 is reset by the elastic force of the second spring 33. At this time, the plane 322 of the stopper 32 blocks the impactor model 60, preventing the impactor model 60 from falling from the right side of the accommodating tube 30. Example 4

[0047] like Fig.12 and Fig.13As shown, this embodiment is substantially the same as the above embodiment, except that a crossbeam 41 is supported above the guide rail 20 by a bracket 40, a mounting frame 42 is provided at the bottom of the crossbeam 41, a baffle 43 is rotatably connected to the bottom of the mounting frame 42, the bottom of the baffle 43 is lower than the top of the opening of the accommodating cylinder 30, and the baffle 43 is connected to the mounting frame 42 via a third spring 45. It should be noted that, after the impactor model 60 is loaded, the electric slide rail 22 is in a stationary state waiting to move. If the guide rail 20 is tilted downward at this time (the angle is set according to the experimental requirements), the impactor model 60 in the accommodating tube 30 may slide out from the left side of the accommodating tube 30. Based on this, the present solution is provided with a rotatable baffle 43 at the guide rail 20 near the storage box 50. After the impactor model 60 is loaded, the baffle 43 is located at the left opening of the accommodating tube 30 to form a barrier to the impactor model 60 in the accommodating tube 30. During the impact test, the electric slide rail 22 moves to the left (when the electric slide rail 22 moves at a high speed, the impactor model 60 in the accommodating tube 30 will not fall from the left side of the accommodating tube 30. Only after the electric slide rail 22 is stationary, the impactor model 60 will fly out from the left side of the accommodating tube 30 at a high speed due to the effect of inertia). The accommodating tube 30 on the electric slide rail 22 will drive the baffle 43 to rotate, so that the baffle 43 avoids the accommodating tube 30 to prevent motion interference. When the accommodating tube 30 and the baffle 43 are completely offset, the baffle 43 is reset by the action of the third spring 45 .

[0048] like Fig.13 As shown, in this embodiment, a limit rod 44 is provided on the mounting frame 42, and the limit rod 44 contacts the side of the baffle 43 close to the receiving box. The baffle 43 includes a fixed plate 432 and a telescopic plate 431. The fixed plate 432 is rotatably connected to the mounting frame 42, and a cavity 433 is provided in the fixed plate 432. One end of the telescopic plate 431 is connected to the cavity 433 through a fourth spring 46, and the other end extends outside the cavity 433; a second guide surface is provided on the side of the telescopic plate 431 away from the receiving box, and the second guide surface is inclined from top to bottom in a direction close to the receiving box. It should be noted that, since the baffle 43 can rotate left and right, when the accommodating cylinder 30 needs to be loaded with the impactor model 60, the electric slide rail 22 moves to the right, and at this time, the baffle 43 is also rotated to avoid the accommodating cylinder 30. However, after the accommodating cylinder 30 is loaded, if the distance between the accommodating cylinder 30 and the baffle 43 is too small, the baffle 43 will overlap the top of the accommodating cylinder 30, that is, the accommodating cylinder 30 will block the rotation and reset of the baffle 43, such as Fig.14As shown, based on this, the present solution is provided with a limit rod 44 and a telescopic plate 431. When the electric slide rail 22 drives the accommodating cylinder 30 to move to the right to load the impactor model 60, the limit rod 44 blocks the baffle 43, so that the baffle 43 cannot rotate to the right (cannot rotate counterclockwise). At this time, the telescopic plate 431 is pushed to the right by the accommodating cylinder 30, and the thrust is dispersed to the vertical direction through the second guide surface, so that the telescopic plate 431 shrinks into the cavity 433 of the fixed plate 432. When the accommodating cylinder 30 is offset from the telescopic rod, the telescopic plate 431 is reset by the elastic force of the fourth spring 46, thereby blocking the impactor model 60 in the accommodating cylinder 30.

[0049] The working principle of the present invention is: First, the angle of the guide rail 20 is adjusted according to the test requirements, that is, the telescopic device 21 is extended or contracted to change the angle of the guide rail 20; Then, the impactor model 60 in the receiving tube 30 is filled, specifically: The electric slide rail 22 drives the accommodating cylinder 30 to move rightward. During the rightward movement, there are two working states at the same time, one of which is: refer to Figure 7 and Figure 8 When the electric slide 22 contacts the second push rod 76, the electric slide 22 will transmit power to the second push rod 76 during the continued movement, so as to drive the second push rod 76 to move rightward. After the second push rod 76 moves rightward, the gear 74 meshing with it is driven to rotate counterclockwise through the second rack 77. After the gear 74 rotates counterclockwise, it drives the top first push rod 72 to move leftward through the first rack 73. During the movement of the first push rod 72 to the left, it penetrates into the storage box 50 from the second opening 52, and pushes the impactor model 60 at the bottom of the storage box 50 to the left. Since the accommodating tube 30 is moving to the right, the impactor model 60 will be pushed into the accommodating tube 30. During the process, the impactor model 60 will first contact the first guide surface 321 of the stopper 32. Since the first guide surface 321 is an arc-shaped surface, when the first guide surface 321 is pushed to the left by the impactor model 60, it will disperse the force to the direction toward the housing 31 through the first guide surface 321, so that the stopper 32 is gradually compressed into the housing 31, preventing the stopper 32 from blocking the loading of the impactor model 60. After the loading of the impactor model 60 is completed, the impactor model 60 and the stopper 32 are staggered, and the stopper 32 is reset by the elastic force of the second spring 33. At this time, the plane 322 of the stopper 32 blocks the impactor model 60, preventing the impactor model 60 from falling from the right side of the accommodating tube 30. The second is: When the electric slide rail 22 drives the accommodating cylinder 30 to move rightward to load the impactor model 60, the limiting rod 44 blocks the baffle 43, so that the baffle 43 cannot rotate rightward (cannot rotate counterclockwise). At this time, the telescopic plate 431 is pushed rightward by the accommodating cylinder 30, and the thrust is dispersed to the vertical direction through the second guide surface, so that the telescopic plate 431 shrinks and enters the cavity 433 of the fixed plate 432. When the accommodating cylinder 30 is offset from the telescopic plate, the telescopic plate 431 is reset by the elastic force of the fourth spring 46, so as to block the impactor model 60 in the accommodating cylinder 30. Then, the hatch 2 is closed, and the heater 3 and the water pump 6 are started. The water pump 6 pressurizes the water in the water tank 4 and sprays it between the blade 8 and the heater 3 through the nozzle 7, while the hot air blown out by the heater 3 blows the water mist toward the blade 8, so that the water mist acts on the blade 8 from the front of the blade 8, so that the blade 8 is in full contact with the water mist. When the temperature and humidity in the test chamber 1 reach the set values, the hatch 2 is opened, and the electric slide rail 22 performs acceleration motion on the guide rail 20. During the movement, the accommodating cylinder 30 on the electric slide rail 22 will drive the baffle 43 to rotate, so that the baffle 43 avoids the accommodating cylinder 30 to prevent movement interference. Then, the electric slide rail 22 drives the impactor model 60 to continue to perform acceleration motion. When the moving speed of the electric slide rail 22 reaches the set value, the electric slide rail 22 is closed, and the impactor model 60 hits the blade 8 in the test chamber 1 at a certain speed through inertia.

[0050] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

[0051] The circuits, electronic components and modules involved are all prior art and can be fully implemented by those skilled in the art. Needless to say, the content protected by the present invention does not involve improvements to software and methods.

[0052] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0053] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An engine test device, characterized in that: include: A test chamber (1), wherein an engine (9) is provided at one end of the test chamber (1), blades (8) of the engine (9) are located in the test chamber (1), an openable and closable door (2) is provided at one end of the test chamber (1) away from the blades (8), a heater (3) is provided on the door (2), and an air outlet end of the heater (3) faces the blades (8); A water tank (4), the water tank (4) being located at one side of the test chamber (1), the water tank (4) being provided with a water pipe (5) in communication therewith, the water pipe (5) being provided with a water pump (6), the water pipe (5) being connected to a nozzle (7) at one end thereof away from the water tank (4), the nozzle (7) being located in the test chamber (1), and the water outlet of the nozzle (7) being located between the heater (3) and the blade (8); A workbench (10) and a telescopic device (21), wherein the workbench (10) is located at one side of the test cabin (1) and opposite to the cabin door (2), a guide rail (20) is provided on the top of the workbench (10), one end of the guide rail (20) is hinged to the workbench (10), one end of the telescopic device (21) is hinged to the workbench (10), and the other end is hinged to the bottom of the guide rail (20), the guide rail (20) is provided with an electric slide rail (22) that slidably cooperates with the guide rail (20), and the electric slide rail (22) is provided with a accommodating cylinder (30) for placing an impact object model (60).

2. An engine testing device according to claim 1, characterized in that: A storage box (50) is provided at the top of one end of the guide rail (20) away from the test chamber (1), and a plurality of impactor models (60) are stacked from top to bottom in the storage box (50); a first opening (51) is provided through one end of the storage box (50) facing the accommodating cylinder (30) for allowing a single impactor model (60) to enter and exit, and a second opening (52) is provided through one end of the storage box (50) opposite to the first opening (51); A support plate (70) is further provided at one end of the guide rail (20) away from the test chamber (1), and a first slide groove (71) is provided on the support plate (70). The first slide groove (71) is arranged transversely, and a first push rod (72) is slidably embedded in the first slide groove (71), and the first push rod (72) is opposite to the second opening (52); The support plate (70) is also provided with a transmission device, which can drive the electric slide rail (22) and the first push rod (72) to connect. When the electric slide rail (22) moves in a direction away from the cabin door (2), the transmission device drives the first push rod (72) to move in a direction close to the second opening (52), so as to push the impact object model (60) at the bottom of the accommodating tube (30) out of the first opening (51).

3. An engine testing device according to claim 2, characterized in that: The transmission device comprises a second push rod (76) and a second slide groove (75), wherein the second slide groove (75) is provided on the support plate (70) and is located below the first slide groove (71), the second push rod (76) is slidably embedded in the second slide groove (75), and one end of the second push rod (76) faces the electric slide rail (22) and passes through the bottom of the accommodating box in a direction close to the electric slide rail (22); The first push rod (72) and the second push rod (76) are provided with a first rack (73) and a second rack (77) respectively. The support plate (70) is rotatably connected with a gear (74), and the gear (74) is meshed with the first rack (73) and the second rack (77) located on the upper and lower sides thereof respectively.

4. An engine testing device according to claim 3, characterized in that: An end of the second push rod (76) facing the electric slide rail (22) is provided with an abutment plate (78), and a first spring (55) is provided on the abutment plate (78). An end of the first spring (55) away from the baffle (43) is connected to the bottom of the storage box, and the first spring (55) is sleeved on the second push rod (76).

5. An engine testing device according to claim 4, characterized in that: A movable plate (53) is slidably embedded in the bottom of the inner cavity of the containing box, one end of the movable plate (53) extends outside the containing box and is connected to the abutment plate (78), and a limiting groove (54) matching the shape of the impact object model (60) is provided on the top of the movable plate (53).

6. An engine testing device according to claim 2, characterized in that: A shell (31) communicating with the inner cavity of the accommodating cylinder (30) is provided on the side wall of the accommodating cylinder (30), a stopper (32) is provided in the shell (31), the stopper (32) is connected to the shell (31) via a second spring (33), one end of the stopper (32) extends into the accommodating cylinder (30), and a first guide surface (321) is provided at one end of the stopper (32) facing the accommodating box, the first guide surface (321) being an arc-shaped surface.

7. An engine testing device according to claim 6, characterized in that: One end of the stopper (32) away from the first guide surface (321) is a flat surface (322).

8. An engine testing device according to claim 2, characterized in that: A crossbeam (41) is supported above the guide rail (20) via a bracket (40); a mounting frame (42) is provided at the bottom of the crossbeam (41); a baffle (43) is rotatably connected to the bottom of the mounting frame (42); the bottom of the baffle (43) is lower than the top of the opening of the accommodating cylinder (30), and the baffle (43) is connected to the mounting frame (42) via a third spring (45).

9. An engine testing device according to claim 8, characterized in that: The mounting frame (42) is provided with a limiting rod (44), the limiting rod (44) is in contact with a side of the baffle (43) close to the containing box, the baffle (43) comprises a fixed plate (432) and a telescopic plate (431), the fixed plate (432) is rotatably connected to the mounting frame (42), a cavity (433) is provided in the fixed plate (432), one end of the telescopic plate (431) is connected to the cavity (433) via a fourth spring (46), and the other end extends outside the cavity (433); A second guide surface is provided on a side of the telescopic plate (431) away from the containing box, and the second guide surface is inclined from top to bottom in a direction approaching the containing box.

10. An engine testing device according to claim 1, characterized in that: The bottom of the workbench (10) is provided with table legs (12), and the table legs (12) are retractable.

Images