An engine test stand and a multi-engine testing method based on flexible switching

Abstract

This invention discloses an engine test stand and a multi-engine testing method based on flexible switching, solving the technical problems of long switching cycles and high switching costs caused by changing the moving frame during engine test stand switching. The engine test stand includes piping fixtures, various transition fixtures, and pipeline transition pipes. The transition frame includes an upper transition frame, or an upper transition frame and a lower transition frame. The upper end of the upper transition frame is connected to a fixed frame, and the upper transition part of the transition frame is connected to the lower end of the lower transition frame, or to the lower end of the upper transition frame. The lower transition part of the transition frame carries a pipeline docking flange. The upper end of each transition fixture is used to adapt to the lower transition part of the transition frame, and the lower end is adapted to the upper end of the frame of one type of engine. The piping fixture is used for piping the engine's inlet pipeline in the preparation room, including a connecting ring plate and a piping docking flange. Each type of pipeline transition pipe is connected at one end to the engine's inlet pipeline and at the other end to the pipeline docking flange.

Description

Technical Field

[0001] This invention relates to an engine testing system and its switching method, specifically to an engine test stand and a multi-engine testing method based on flexible switching. Background Technology

[0002] Rocket engine (hereinafter referred to as "engine") testing is a core step in verifying design, identifying risks, and ensuring launch safety. Engine test benches are used to calibrate the performance of the engine under test, verify reliability, investigate safety issues, and optimize engineering. Its core purpose is to simulate real-world operating conditions to verify engine performance and reliability.

[0003] Chinese utility model patent CN221078054U discloses a rocket engine test frame that can be hoisted as a whole, comprising: a moving frame and a fixed frame coaxially arranged, the moving frame being divided into an upper moving frame and a lower moving frame connected to each other; a lifting ring, vertically arranged on the axis of the fixed frame and the moving frame, and fixedly connected to the upper surface of the fixed frame; multiple vertical protection mechanisms, vertically connected to the fixed frame and the upper moving frame respectively, for axially locking the fixed frame and the upper moving frame; multiple lateral protection mechanisms, horizontally connected to the fixed frame and the lower moving frame respectively, for radially locking the fixed frame and the lower moving frame; and multiple leaf springs, the lower leaf springs being horizontally connected to the fixed frame and the lower moving frame respectively.

[0004] During the switchover of the aforementioned rocket engine test rig, a lower moving frame is replaced according to the rocket engine's frame structure. The rocket engine is then placed on the test rig, and the replaced lower moving frame is connected to the rocket engine's frame, along with the engine inlet piping and auxiliary piping. When the rocket engine's height exceeds or falls below the height of the rocket engine test rig, both the upper and lower moving frames need to be replaced to accommodate the height of the rocket engine being tested. Since the upper moving frame houses the measurement system, replacing it requires reinstalling and recalibrating the measurement system, resulting in a long switchover time and high switchover costs. Summary of the Invention

[0005] The purpose of this invention is to solve the technical problems of long switching cycles and high switching costs caused by replacing the lower moving frame or replacing the upper and lower moving frames together when switching rocket engine test stands in the prior art. The invention provides an engine test stand and a multi-engine test method based on flexible switching.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An engine test stand for engine testing includes a fixed stand, a thrust measurement system, and a moving stand; the moving stand includes a transition stand and a adapter stand; its special feature is that it also includes piping fixtures, various adapter fixtures, and various pipeline transition pipes;

[0008] The transition frame includes: an upper transition frame, or an upper transition frame and a lower transition frame connected to the lower end of the upper transition frame;

[0009] The upper end of the upper transition frame is connected to the fixed frame, and the thrust measurement system is installed on it;

[0010] The adapter has an upper adapter and a lower adapter. The upper adapter is connected to the lower end of the upper transition frame or to the lower end of the lower transition frame. The lower ring plate of the lower adapter is detachably connected to the upper end of one of the various adapter fixtures and carries a pipe connection flange for connecting to the inlet pipe of the engine.

[0011] The upper end of each of the aforementioned adapters is used to connect with the lower ring plate of the lower adapter, and the lower end is used to adapt and connect with the upper end of the frame of a corresponding engine.

[0012] The piping fixture is used to pipe the engine's inlet pipe in the preparation room. It includes a connecting ring plate and a piping docking flange set on the connecting ring plate. The connecting ring plate is used to support the piping docking flange and is connected to the engine frame through the adapter fixture. The connecting ring plate is a 1:1 replica of the lower ring plate, and the piping docking flange is a 1:1 replica of the pipeline docking flange.

[0013] Various pipeline transition pipes are used to connect the inlet pipelines of various engines. After the pipeline is connected, one end of the transition pipe is connected to the inlet pipeline of the engine, and the other end is connected to the pipeline connecting flange.

[0014] Furthermore, the height of the lower transition frame is 1-2m.

[0015] Furthermore, the piping connection flange is integrated onto the connecting ring plate via a bracket.

[0016] Meanwhile, the present invention also provides a multi-engine testing method based on flexible switching, which is characterized by including the following steps:

[0017] Step 1: Construct the engine test stand as described above and determine the engine test stand parameters;

[0018] Step 2: Obtain the first engine and determine its parameters and frame parameters;

[0019] Step 3: Selection of the moving frame and piping of the first engine

[0020] In the test workshop, based on the engine test frame parameters and the frame parameters, it is determined whether the upper transition part of the adapter frame is connected to the lower end of the upper transition frame or to the lower end of the lower transition frame.

[0021] In the preparation room, select the corresponding adapter tool according to the frame parameters, and connect the piping tool to the frame through the adapter tool; select the corresponding diameter pipe transition pipe according to the engine parameters, and cut the pipe transition pipe to the appropriate length, so that one end is connected to the inlet pipe of the first engine, and the other end is connected to the piping flange on the piping tool; then disassemble the piping tool to complete the piping of the inlet pipe of the first engine.

[0022] Step 4: Test run of the first engine

[0023] Transfer the first engine with piping completed in step 3 to the test workshop, connect the transfer tooling to the lower transfer part of the transfer frame, and connect one end of the pipeline transition pipe to the pipeline docking flange to start the test run of the first engine;

[0024] Step 5: Obtain the second engine and determine its engine parameters and frame parameters;

[0025] Step 6, Piping of the second engine

[0026] In the preparation room, select the corresponding adapter tool according to the frame parameters obtained in step 5, and connect the piping tool to the frame through the adapter tool; select the corresponding diameter pipe transition pipe according to the engine parameters, and cut the pipe transition pipe to the appropriate length, so that one end is connected to the inlet pipe of the second engine, and the other end is connected to the piping flange on the piping tool; then disassemble the piping tool to complete the piping of the inlet pipe of the second engine.

[0027] Step 7: Engine interchange between the test workshop and the preparation workshop.

[0028] After the first engine in the test workshop is completed, it is transferred to the preparation room, the transfer tooling and pipeline transition pipe are removed, and the first engine test is completed.

[0029] Meanwhile, the second engine, whose piping was completed in step 6, was transferred to the test workshop. Based on the engine test frame parameters obtained in step 1 and the frame parameters obtained in step 5, it was determined whether the upper transition part of the adapter frame was connected to the lower end of the upper transition frame or to the lower end of the lower transition frame. Then, the adapter tooling was connected to the lower transition part of the adapter frame, and one end of the pipeline transition pipe was connected to the pipeline docking flange to start the test run of the second engine.

[0030] Step 8: Return to step 5, obtain the third engine, and determine its engine parameters and frame parameters; then use the same method as steps 6 and 7 until all engines have been tested, thus completing the multi-engine test based on flexible switching.

[0031] Furthermore, in step 1, the engine test frame parameters include the total installation height of the fixed frame. Total installation height of the moving frame and the height of the lower transition frame ;

[0032] In step 2, the engine parameters include the engine inlet piping parameters; the frame parameters include the total mounting height of the engine on the frame. Dimensions of the connection surface at the top of the frame.

[0033] Furthermore, in steps 3 and 6, the specific piping process for the engine's transition pipes is as follows:

[0034] In the preparation room, according to the dimensions of the upper connection surface of the frame, the corresponding adapter is selected, and the piping fixture is connected to the frame through the adapter. According to the engine parameters, the corresponding diameter of the pipeline transition pipe is selected, and the pipeline transition pipe is cut to a suitable length so that one end is connected to the inlet pipe of the first engine, and the other end is connected to the piping flange on the piping fixture. Then, the piping fixture is disassembled to complete the piping of the pipeline transition pipe of the first engine.

[0035] Furthermore, in steps 3 and 7, the selection of the moving frame is specifically as follows:

[0036] In the trial workshop, determine if... Then, disassemble the lower transition frame and connect the upper transition part of the adapter frame to the lower end of the upper transition frame; if Then the upper adapter of the adapter frame is connected to the lower end of the lower transition frame.

[0037] The beneficial effects of this invention are:

[0038] 1. The present invention provides an engine test stand, which employs an upper transition frame and a lower transition frame. When the engine frame height exceeds a certain height, the lower transition frame is removed and the upper transition frame is connected to the adapter frame, enabling the testing of engines with more frame heights. Furthermore, a thrust measurement system is installed on the upper transition frame. Since the upper transition frame remains unchanged after installation and debugging, the problem of repeatedly debugging the thrust measurement system is avoided, thus reducing the test cycle and test cost.

[0039] 2. The present invention provides an engine test stand. By configuring various adapter tools, when the engine model or structure changes, only the adapter tools need to be replaced to complete the connection between the adapter stand and the engine frame. This effectively avoids the problem of frequent adapter stand replacements and reduces the test cycle and test cost.

[0040] 3. The present invention provides an engine test stand, which designs the connecting ring plate as a 1:1 replica of the lower ring plate and the piping connection flange as a 1:1 replica of the pipeline connection flange, so that the piping work of the engine inlet pipeline can be completed in the test workshop during the test process, saving more installation time in the test workshop and shortening the test cycle.

[0041] 4. The present invention provides a multi-engine testing method based on flexible switching. During the test run in the test workshop, the piping work of the engine inlet pipeline is completed in the preparation room. After the test run in the test workshop is completed, the engines that have finished the test run in the test workshop are exchanged with the engines whose piping has been completed in the preparation room, and their respective subsequent operations are carried out, thereby shortening the engine testing cycle and improving the testing efficiency. Attached Figure Description

[0042] Figure 1 This is a schematic diagram of the structure of an embodiment of an engine test stand according to the present invention;

[0043] Figure 2 This is a three-dimensional structural schematic diagram of a lower transition frame in an embodiment of an engine test frame according to the present invention.

[0044] The attached figures are labeled as follows:

[0045] 1. Fixed frame; 2. Moving frame; 201. Transition frame; 2011. Upper transition frame; 2012. Lower transition frame; 202. Adapter frame; 3. Adapter tooling; 4. Machine frame; 5. Engine. Detailed Implementation

[0046] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings and embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0047] like Figure 1-2 As shown in the figure, an engine test stand provided in this embodiment of the invention is used for testing engine 5. It includes a fixed stand 1, a thrust measurement system, a moving stand 2, piping fixtures, various transition fixtures 3, and various pipeline transition pipes. The moving stand 2 includes a transition frame 201 and a transition frame 202. The transition frame 201 includes an upper transition frame 2011, or an upper transition frame 2011 and a lower transition frame 2012 connected to the lower end of the upper transition frame 2011. The upper end of the upper transition frame 2011 is connected to the fixed stand 1, and a thrust measurement system is installed on it. The lower transition frame 2012 has a height of 1-2m; in this embodiment, the lower transition frame 2012 has a height of 1.5m.

[0048] The adapter 202 has an upper adapter portion located at its upper part and a lower adapter portion located at its lower part. The upper adapter portion is connected to the lower end of the lower transition frame 2012 or to the lower end of the upper transition frame 2011. The lower ring plate of the lower adapter portion is detachably connected to the upper end of one of the various adapter fixtures 3 and carries a pipe docking flange for connecting to the inlet pipe of the engine 5.

[0049] The upper end of each type of adapter tool 3 is used to connect with the lower ring plate of the lower adapter part, and the lower end is used to adapt and connect with the upper end of the frame 4 of a corresponding engine 5.

[0050] The piping fixture is used to pipe the inlet pipe of the engine 5 in the preparation room. It includes a connecting ring plate and a piping docking flange set on the connecting ring plate. The connecting ring plate is used to support the piping docking flange and is connected to the frame 4 of the engine 5 through the adapter 3. The connecting ring plate is a 1:1 replica of the lower ring plate and the piping docking flange is a 1:1 replica of the pipe docking flange.

[0051] The lower transition section of the piping fixture can be directly divided into two parts, with the radial section where the pipe connection flange is located as the interface and the section below the interface as the lower transition section. When making the piping fixture, all the components of the lower transition section can be directly replicated. Alternatively, only the lower ring plate and the pipe connection flange can be replicated. The replicated pipe connection flange (i.e., the piping connection flange) can be integrated onto the replicated lower ring plate (i.e., the connecting ring plate) through a separately set bracket, which can save more installation space and replication costs.

[0052] Various pipeline transition pipes are used to connect to the inlet pipelines of various engines 5. After the pipeline is connected, one end of the pipe is connected to the inlet pipeline of engine 5, and the other end is connected to the pipeline connecting flange.

[0053] Meanwhile, the present invention also provides a multi-engine testing method based on flexible switching, including the following steps:

[0054] Step 1: Construct the engine test stand as described above and determine its parameters, including the total installation height of the fixed frame 1. Total installation height of moving frame 2 and the height of the lower transition frame 2012 ;

[0055] Step 2: Obtain the first engine 5 and determine its parameters and frame parameters; engine parameters include the inlet pipe parameters of engine 5; frame parameters include the total mounting height of engine 5 on the frame. Dimensions of the connection surface at the top of the frame;

[0056] Inlet pipe parameters include the location of the engine inlet pipe, its height from the ground, and its inlet diameter;

[0057] Step 3: Selection of moving frame 2 and piping of the first engine 5

[0058] In the test workshop, based on the engine test frame parameters and the engine frame parameters, it was determined whether the upper connecting part of the adapter 202 would connect to the lower end of the upper transition frame 2011 or to the lower end of the lower transition frame 2012; the specific selection process is as follows:

[0059] In the trial workshop, determine if... Then, remove the transition frame 2012 and connect the upper transition part of the adapter frame 202 to the lower end of the upper transition frame 2011; if Then the upper connecting part of the adapter frame 202 is connected to the lower end of the lower transition frame 2012;

[0060] In the preparation room, according to the size of the upper connection surface of the frame, select the corresponding adapter 3 and connect the piping fixture to the frame 4 through the adapter 3; select the corresponding diameter pipe transition pipe according to the engine parameters, and cut the pipe transition pipe to the appropriate length so that one end is connected to the inlet pipe of the first engine 5 and the other end is connected to the piping flange on the piping fixture. Then, disassemble the piping fixture to complete the piping of the inlet pipe of the first engine.

[0061] Step 4: Test run of the first engine.

[0062] Transfer the first engine 5, whose piping was completed in step 3, to the test workshop. Connect the transfer tool 3 to the lower transfer part of the transfer frame 202, and connect one end of the pipeline transition pipe to the pipeline docking flange to start the test run of the first engine 5.

[0063] Step 5: Obtain the second engine 5 and determine its engine parameters and frame parameters;

[0064] Step 6, Second engine 5 piping

[0065] In the preparation room, select the corresponding adapter 3 according to the dimensions of the upper connection surface of the frame obtained in step 5, connect the piping fixture to the frame 4 through the adapter 3, select the corresponding diameter pipe transition pipe according to the engine parameters, and cut the pipe transition pipe to the appropriate length so that one end is connected to the inlet pipe of the second engine 5 and the other end is connected to the piping flange on the piping fixture. Then disassemble the piping fixture to complete the piping of the inlet pipe of the second engine.

[0066] Step 7: Exchange engine 5 between the test workshop and the preparation room.

[0067] After the engine 5 in the test workshop is completed, it is transferred to the preparation room, the transfer tool 3 and the pipeline transition pipe are removed, and the test of the engine is completed.

[0068] Simultaneously, the second engine 5, whose piping was completed in step 6, was transferred to the test workshop. In the test workshop, it was determined that if... Then, remove the transition frame 2012 and connect the upper transition part of the adapter frame 202 to the lower end of the upper transition frame 2011; if Then connect the upper transition part of the adapter 202 to the lower end of the lower transition frame 2012; then connect the adapter tool 3 to the lower transition part of the adapter 202, and connect one end of the pipeline transition pipe to the pipeline docking flange to start the test run of the second engine 5.

[0069] Step 8: Return to step 5, obtain the third engine 5, and determine its engine parameters and frame parameters; then use the same method as steps 6 and 7 until all engines 5 have been tested, thus completing the multi-engine test based on flexible switching.

[0070] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present invention should be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. An engine test stand for testing an engine (5), comprising a fixed stand (1), a thrust measurement system, and a moving stand (2); the moving stand (2) comprising a transition stand (201) and a adapter stand (202); characterized in that: It also includes piping fixtures and various transition fixtures (3) and various pipeline transition pipes; The transition frame (201) includes: an upper transition frame (2011), or an upper transition frame (2011) and a lower transition frame (2012) connected to the lower end of the upper transition frame (2011). The upper end of the upper transition frame (2011) is connected to the fixed frame (1), and the thrust measurement system is installed on it; The adapter (202) has an upper adapter and a lower adapter. The upper adapter is connected to the lower end of the upper transition frame (2011) or to the lower end of the lower transition frame (2012). The lower ring plate of the lower adapter is detachably connected to the upper end of one of the various adapter tools (3) and carries a pipe docking flange for connecting to the inlet pipe of the engine (5). The upper end of each of the aforementioned adapters (3) is used to connect with the lower ring plate of the lower adapter, and the lower end is used to be adapted to connect with the upper end of the frame (4) of a corresponding engine (5); The piping fixture is used for piping the inlet pipe of the engine (5) in the preparation room. It includes a connecting ring plate and a piping docking flange set on the connecting ring plate. The connecting ring plate is used to support the piping docking flange and is connected to the frame (4) of the engine (5) through the adapter (3). The connecting ring plate is a 1:1 replica of the lower ring plate and the piping docking flange is a 1:1 replica of the pipe docking flange. Various pipeline transition pipes are used to pipe the inlet pipelines of various engines (5). After the piping is completed, one end of the pipe is connected to the inlet pipeline of the engine (5), and the other end is connected to the pipeline docking flange.

2. The engine test stand according to claim 1, characterized in that: The lower transition frame (2012) has a height of 1-2m.

3. The engine test stand according to claim 1, characterized in that: The piping connection flange is integrated onto the connecting ring plate via a bracket.

4. A multi-engine testing method based on flexible switching, characterized in that, Includes the following steps: Step 1: Construct the engine test stand as described in claim 1 and determine the engine test stand parameters; Step 2: Obtain the first engine (5) and determine the engine parameters and its frame parameters; Step 3: Selection of moving frame (2) and piping of the first engine (5) In the test workshop, based on the engine test frame parameters and the frame parameters, it is determined whether the upper transition part of the adapter frame (202) is connected to the lower end of the upper transition frame (2011) or to the lower end of the lower transition frame (2012). In the preparation room, select the corresponding adapter (3) according to the frame parameters, and connect the piping fixture to the frame (4) through the adapter (3); select the corresponding diameter pipe transition pipe according to the engine parameters, and cut the pipe transition pipe to the appropriate length so that one end is connected to the inlet pipe of the first engine (5) and the other end is connected to the piping flange on the piping fixture. Then disassemble the piping fixture to complete the piping of the inlet pipe of the first engine. Step 4, Test run of the first engine (5) The first engine (5) with piping completed in step 3 is transferred to the test workshop. The transfer tool (3) is connected to the lower transfer part of the transfer frame (202), and one end of the pipeline transition pipe is connected to the pipeline docking flange to start the test run of the first engine (5). Step 5: Obtain the second engine (5) and determine its engine parameters and frame parameters; Step 6, Second engine (5) piping In the preparation room, select the corresponding adapter (3) according to the frame parameters obtained in step 5, and connect the piping fixture to the frame (4) through the adapter (3); select the corresponding diameter pipe transition pipe according to the engine parameters, and cut the pipe transition pipe to the appropriate length so that one end is connected to the inlet pipe of the second engine (5) and the other end is connected to the piping flange on the piping fixture. Then disassemble the piping fixture to complete the piping of the inlet pipe of the second engine. Step 7: Exchange the engines (5) in the test workshop and the preparation workshop. After the first engine (5) in the test workshop is completed, it is transferred to the preparation room, the transfer tool (3) and pipeline transition pipe are removed, and the first engine test is completed. Meanwhile, the second engine (5) with piping completed in step 6 is transferred to the test workshop. Based on the engine test frame parameters obtained in step 1 and the frame parameters obtained in step 5, it is determined whether the upper connecting part of the adapter frame (202) is connected to the lower end of the upper transition frame (2011) or to the lower end of the lower transition frame (2012). Then, the adapter tool (3) is connected to the lower connecting part of the adapter frame (202), and one end of the pipeline transition pipe is connected to the pipeline connecting flange to start the test run of the second engine (5). Step 8: Return to step 5, obtain the third engine (5), and determine its engine parameters and frame parameters; then use the same method as steps 6 and 7 until all engines (5) have been tested, and complete the multi-engine test based on flexible switching.

5. The multi-engine testing method based on flexible switching according to claim 4, characterized in that, In step 1, the engine test frame parameters include the total installation height of the fixed frame (1). Total installation height of moving frame (2) and the height of the lower transition frame (2012) ; In step 2, the engine parameters include the inlet pipe parameters of the engine (5); the frame parameters include the total mounting height of the engine (5) on the frame. Dimensions of the connection surface at the top of the frame.

6. The multi-engine testing method based on flexible switching according to claim 5, characterized in that, In steps 3 and 6, the specific piping process for the engine's transition pipes is as follows: In the preparation room, according to the size of the upper connection surface of the frame, select the corresponding adapter (3), connect the piping fixture to the frame (4) through the adapter (3), select the corresponding diameter pipe transition pipe according to the engine parameters, and cut the pipe transition pipe to the appropriate length so that one end is connected to the inlet pipe of the first engine (5) and the other end is connected to the piping flange on the piping fixture. Then disassemble the piping fixture to complete the piping of the pipe transition pipe of the first engine.

7. The multi-engine testing method based on flexible switching according to claim 6, characterized in that, In steps 3 and 7, the selection of the moving frame (2) is as follows: In the trial workshop, determine if... Then, disassemble the lower transition frame (2012) and connect the upper transition part of the adapter frame (202) to the lower end of the upper transition frame (2011); if Then the upper connecting part of the adapter frame (202) is connected to the lower end of the lower transition frame (2012).

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