Single-operation handle limiting tool for debugging helicopter engine
By designing a single-handle limiting fixture for helicopter engine debugging, the problem of inconvenient observation and damage caused by the throttle stop block being installed in the engine compartment was solved, enabling precise control of the throttle scale in the cockpit and improving test efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 成都国营锦江机器厂
- Filing Date
- 2025-05-09
- Publication Date
- 2026-05-15
AI Technical Summary
In the existing technology, the throttle stop block is installed in the engine compartment, which makes it inconvenient to observe, easily damages the throttle lever, and increases costs due to repeated test drives.
Design a single-handle limiting fixture for helicopter engine debugging, including a fixture body, a limit baffle, a clamp and a limit locking component, which is fixed to the single-handle by a wing bolt, allowing direct observation and control of the throttle scale in the cockpit, avoiding the need for the throttle stop block to be installed in the engine compartment.
It enables precise control of the throttle scale from inside the cockpit, reduces the risk of damage to the throttle lever, avoids repeated test runs, and improves test run efficiency.
Smart Images
Figure CN224241277U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of aviation mechanical tools technology, and more specifically, to a single-handle limiting tool for helicopter engine debugging. Background Technology
[0002] During the comprehensive performance testing and debugging of the helicopter engine, it is required to check the free turbine speed of the left and right engines under specified conditions. When checking the free turbine speed, it is necessary to operate a single control lever, which indirectly controls the throttle lever connected to the engine throttle scale through the transmission of multiple control levers. The engine throttle scale indicator is adjusted to the 85°±1 position. The 85°±1 position of the throttle scale is the neutral position of the engine after entering the main engine. At this position, the compressor turbine speed and free turbine speed of the left and right engines can be effectively recorded, and then the corresponding engine speed and free turbine speed data of the two engines can be compared.
[0003] The throttle lever and throttle scale are both located in the engine compartment, while the single control lever is in the helicopter cockpit. The throttle lever and the single control lever are connected by multiple control levers. Therefore, test personnel cannot directly observe the throttle scale data when operating the single control lever. The method adopted in related technologies is to install a throttle stop block on the throttle lever of each engine in the engine compartment. This ensures that when the throttle scale rises to 85°±1, the tip of the throttle stop block contacts the engine compartment floor, thereby achieving the effect of limiting the movement of the throttle lever.
[0004] However, the above method has the following technical problems in actual operation:
[0005] 1. Two throttle stop blocks are installed on the left and right engine throttle levers respectively by bolts. Because the throttle stop blocks are made of metal, the paint layer of the throttle levers is easily peeled off and the levers are damaged after the bolts are tightened, which may cause safety and quality hazards.
[0006] 2. The throttle stop block is installed in the engine compartment. After the engine cover is fastened, the test driver cannot observe whether the engine throttle stop block is working effectively. In addition, the control wiring from the single control lever to the throttle lever is complicated and far away, resulting in a long lever arm. Some people cannot control the operating force properly, which can easily cause the throttle stop block to shift, causing the throttle stop block to lose its limiting action function.
[0007] 3. The throttle stop block is installed in the engine compartment. After the engine free turbine speed check is completed, the engine must be stopped, the engine compartment opened, the throttle stop block removed, and the engine must be retested for subsequent checks, which increases the number of test runs and test run costs. Utility Model Content
[0008] The purpose of this invention is to solve the technical problem that the throttle stop block has a poor limiting effect during test runs and that repeated test runs increase the test run cost. Therefore, this invention proposes a single-handle limiting fixture for helicopter engine testing.
[0009] To achieve the above objectives, the present invention adopts the following technical solution:
[0010] A single-handle limiting fixture for helicopter engine debugging includes:
[0011] The tooling body is a block-shaped structure;
[0012] Limiting baffles, two of the limiting baffles are slidably connected to both sides of the tooling body, and both of the limiting baffles are close to the end of the tooling body;
[0013] The first clamping plate is disposed on the tooling body at one end away from the limiting baffle and is located on the lower surface of the tooling body;
[0014] The second clamping plate is disposed on the tooling body and is parallel to the first clamping plate, and a gap for accommodating the restrained part is formed between the second clamping plate and the first clamping plate.
[0015] The tooling body is also provided with a limit locking component, which is used to limit the sliding direction of the limit baffle and fix the relative position between the limit baffle and the tooling body.
[0016] Furthermore, both the first and second clamping plates have through screw holes on their surfaces, and wing bolts are threaded into the two screw holes respectively.
[0017] Furthermore, second screw holes are respectively provided on both sides of the tooling body, and a sliding groove is provided on the surface of the limiting baffle; the limiting locking assembly includes:
[0018] Two limiting pins are respectively disposed on both sides of the tooling body. The shape and size of the limiting pins are adapted to the slide groove, and the limiting pins are connected to the slide groove.
[0019] A locking bolt passes through the sliding groove and is threaded into the second threaded hole. The locking bolt cooperates with the limiting pin to restrict the sliding direction of the limiting baffle.
[0020] Furthermore, the limiting baffle is provided with a blocking plane, the blocking plane is perpendicular to the surface of the limiting baffle, and the width of the blocking plane is greater than the width of the limited member.
[0021] Furthermore, the slide is an arc-shaped groove structure, and the curvature of the slide matches the curvature of the restrained component.
[0022] Furthermore, the surfaces of the blocking plane, the first clamping plate, and the second clamping plate are coated with a polytetrafluoroethylene coating.
[0023] The beneficial effects of this utility model are as follows: The single control handle limiting fixture provided in this application is directly connected to the arc-shaped bracket of the single control handle through the first clamp and the second clamp. The test personnel can directly observe the limiting situation between the single control handle and the limiting fixture in the cockpit. The limiting fixture is close to the single control handle and has a small lever arm, which can better control the operating force. The limiting fixture is not easy to shift, making the engine inspection more accurate. Moreover, after the free turbine inspection is completed, there is no need to stop the test personnel. The engine test can be removed directly, and the engine test can continue, thereby improving work efficiency. Attached Figure Description
[0024] Figure 1 This is a schematic diagram of the overall structure of a single control handle limiting fixture for helicopter engine debugging provided in this embodiment of the utility model;
[0025] Figure 2 This is a schematic diagram of the main structure of the tooling in an embodiment of this utility model;
[0026] Figure 3 This is a schematic diagram of the overall structure of a single control handle limiting fixture for helicopter engine debugging provided in this embodiment of the utility model;
[0027] Figure 4 This is a schematic diagram showing the positional relationship between a single-operation handle limiting fixture for helicopter engine debugging and the single-operation handle, provided in an embodiment of this utility model.
[0028] The markings in the diagram are as follows:
[0029] 1. Tooling body; 2. Limiting baffle; 21. Slide groove; 22. Abutting plane; 3. First clamping plate; 4. Second clamping plate; 5. Limiting locking component; 51. Limiting pin; 52. Locking bolt. Detailed Implementation
[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0031] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.
[0032] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0033] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.
[0034] Please see Figures 1 to 4 The illustrated embodiment of this application provides a single control handle limiting fixture for helicopter engine debugging. In practical applications, the single control handle limiting fixture for helicopter engine debugging is installed on an arc-shaped bracket at the bottom of the single control handle. During the comprehensive performance test and debugging of the helicopter engine, when the engine throttle scale indicator rises to the 85°±1 position, the single control handle limiting fixture for helicopter engine debugging can prevent the single control handle from continuing to move backward along the arc-shaped bracket, so that the throttle scale is kept in a neutral position.
[0035] Please see Figure 1 and Figure 2 The single-handle limiting fixture for helicopter engine debugging includes: fixture body 1, limiting baffle 2, first clamping plate 3 and second clamping plate 4; wherein, fixture body 1 is generally rectangular block structure.
[0036] Two limiting baffles 2 are respectively connected to both sides of the tooling body 1. The limiting baffles 2 can slide relative to the tooling body 1, and both limiting baffles 2 are close to the ends of the tooling body 1. A limiting locking component 5 is provided on the tooling body 1 to limit the sliding direction of the limiting baffles 2, and after the limiting baffles 2 slide to the target position, the relative position between the limiting baffles 2 and the tooling body 1 is fixed. By abutting the limiting baffles 2 against one side of the single operating handle, the single operating handle is limited.
[0037] The first clamping plate 3 and the second clamping plate 4 are disposed on the end of the tooling body 1 away from the limiting baffle 2 and are located on the lower surface of the tooling body 1. The first clamping plate 3 and the second clamping plate 4 are parallel, and a space for accommodating the arc-shaped bracket of the single operating handle is formed between the first clamping plate 3 and the second clamping plate 4. The arc-shaped bracket of the single operating handle is clamped by the cooperation of the first clamping plate 3 and the second clamping plate 4, so that the tooling body 1 is connected above the arc-shaped bracket of the single operating handle. In this embodiment, the first clamping plate 3 and the second clamping plate 4 are provided with through first screw holes, and wing bolts are threaded into the two first screw holes respectively. After the first clamping plate 3 and the second clamping plate 4 clamp the arc-shaped bracket of the single operating handle, the wing bolts are screwed to press against the arc-shaped bracket of the single operating handle, further improving the connection stability of the tooling body 1.
[0038] In the above technical solution, the tooling body 1 is provided with second screw holes on both sides to cooperate with the limiting locking member 5, and the limiting baffle 2 is provided with a sliding groove 21 to cooperate with the limiting locking member 5 on its plate surface; the limiting locking member 5 includes: a limiting pin 51 and a locking bolt 52; wherein, the shape and size of the limiting pin 51 are adapted to the sliding groove 21, and the two limiting pins 51 are respectively provided on both sides of the tooling body 1, and are connected to the sliding groove 21 through the limiting pins 51, so that the limiting baffle 2 is slidably connected to the side of the tooling body 1.
[0039] The locking bolt 52 passes through the slide groove 21 and is threaded into the second screw hole. The locking bolt 52 and the limiting pin 51 cooperate to restrict the sliding direction of the limiting baffle 2 on the side of the tooling body 1. When the limiting baffle 2 slides to the target position, the locking bolt 52 is tightened to press against the limiting baffle 2, which can fix the relative position between the limiting baffle 2 and the tooling body 1, thereby achieving the effect of locking the limiting baffle 2.
[0040] In this embodiment, the limiting baffle 2 is also provided with a blocking plane 22, which is perpendicular to the plate surface of the limiting baffle 2; the width of the blocking plane 22 is greater than the width of the single operating handle, so that the single operating handle can abut against the blocking plane 22 after it approaches the limiting baffle 2.
[0041] Please see Figure 3As one embodiment of this application, the slide groove 21 is configured as an arc-shaped groove structure, and the curvature of the slide groove 21 matches the curvature of the arc-shaped bracket of the single operating handle. With the above design, when the limiting baffle 2 slides using the slide groove 21 in conjunction with the limiting pin 51 and the locking bolt 52, the limiting baffle 2 can move parallel to the arc edge of the arc-shaped bracket of the single operating handle, maintaining the distance between it and the arc-shaped bracket of the single operating handle during the movement, so that the blocking plane 22 is parallel to the single operating handle, achieving a better blocking effect.
[0042] As a preferred embodiment of this application, the surfaces of the abutting plane 22, the first clamping plate 3, and the second clamping plate 4 are coated with polytetrafluoroethylene (PTFE). The purpose of the above design is to improve the hardness of the tooling and reduce the friction between it and the single-operation handle, so as to avoid the phenomenon of paint peeling off the single-operation handle after multiple tightening and loosening of the wing bolts and multiple contact.
[0043] Working principle: When using the single control handle limiting fixture for helicopter engine debugging, firstly, the main body 1 of the fixture is installed and fixed on the arc-shaped bracket of the single control handle using the first clamping plate 3 and the second clamping plate 4 with the help of the wing bolts. The test operator manipulates the single control handle to move backward along the arc-shaped bracket. After being transmitted through the control lever, the left and right engine throttle scales are indicated at 85°±1. At this time, the single control handle is stopped, the locking bolt 52 is loosened, the two limit baffles 2 are slid and made to fit against the single control handle, and finally the locking bolt 52 is tightened to complete the debugging and installation of the single control handle limiting fixture for helicopter engine debugging. During the test run and inspection of the engine free turbine adjustment, operate the single control handle. The control lever between the single control handle and the throttle scale will move accordingly. When the single control handle is in contact with the limit baffle 2, the single control handle stops operating. At this time, the left and right engine throttle scale indications should be 85°±1. Record the compressor turbine speed and free turbine speed data of the two engines as required. After the inspection is completed, operate the single control handle back to the initial position to complete the engine free turbine adjustment inspection. The test run personnel can remove the single control handle limiting fixture used for helicopter engine debugging and proceed to the next test run operation as required.
[0044] The single-handle restraint fixture provided in this application is directly connected to the arc-shaped bracket of the single-handle through a first clamping plate 3 and a second clamping plate 4. The test personnel can directly observe the restraint between the single-handle and the restraint fixture in the cockpit. The restraint fixture is close to the single-handle and has a small lever arm, which allows for better control of the operating force. The restraint fixture is not prone to displacement, making the engine inspection more accurate. Furthermore, after the free turbine inspection is completed, the test personnel can directly remove the restraint fixture without stopping the engine, allowing the engine test to continue, thereby improving work efficiency.
[0045] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.
Claims
1. A single-handle limiting fixture for helicopter engine debugging, characterized in that, include: The tooling body is a block-shaped structure; Limiting baffles, two of the limiting baffles are slidably connected to both sides of the tooling body, and both of the limiting baffles are close to the end of the tooling body; A first clamping plate is disposed on the tooling body at one end away from the limiting baffle and located on the lower surface of the tooling body; The second clamping plate is disposed on the tooling body and is parallel to the first clamping plate, and a gap for accommodating the restrained part is formed between the second clamping plate and the first clamping plate. The tooling body is also provided with a limit locking component, which is used to limit the sliding direction of the limit baffle and fix the relative position between the limit baffle and the tooling body.
2. The single-handle limiting fixture for helicopter engine debugging according to claim 1, characterized in that, Both the first and second clamping plates have through screw holes on their surfaces, and wing bolts are threaded into the two screw holes respectively.
3. The single-handle limiting fixture for helicopter engine debugging according to claim 1, characterized in that, The tooling body has second screw holes on both sides, and the limiting baffle has a sliding groove on its surface; the limiting locking assembly includes: Two limiting pins are respectively disposed on both sides of the tooling body. The shape and size of the limiting pins are adapted to the slide groove, and the limiting pins are connected to the slide groove. A locking bolt passes through the sliding groove and is threaded into the second threaded hole. The locking bolt cooperates with the limiting pin to restrict the sliding direction of the limiting baffle.
4. The single-handle limiting fixture for helicopter engine debugging according to claim 1, characterized in that, The limiting baffle is provided with a blocking plane, which is perpendicular to the surface of the limiting baffle, and the width of the blocking plane is greater than the width of the limited member.
5. The single-handle limiting fixture for helicopter engine debugging according to claim 3, characterized in that, The slide is an arc-shaped groove structure, and the curvature of the slide matches the curvature of the restrained part.
6. The single-handle limiting fixture for helicopter engine debugging according to claim 4, characterized in that, The surfaces of the blocking plane, the first clamping plate, and the second clamping plate are coated with polytetrafluoroethylene.