An engine attitude test stand hoisting positioning and locking device

Abstract

This invention provides a hoisting, positioning, and locking device for an engine attitude test stand, comprising a hoisting mechanism, a guiding mechanism, and a positioning and locking mechanism. The hoisting mechanism is mounted on a pitching mechanism for hoisting a roll mechanism. The guiding mechanism includes a first guiding device mounted on the pitching mechanism and a second guiding device mounted on the roll mechanism, which cooperate to guide the roll mechanism during hoisting. The positioning and locking mechanism includes a locking device mounted on the pitching mechanism and a locking element mounted on the roll mechanism, wherein the locking device locks the roll mechanism by locking the locking element. This invention solves the problem of poor fixation of the roll mechanism and achieves the goal of improving the fixation effect of the roll mechanism.

Description

Technical Field

[0001] This invention belongs to the technical field of aero-engine test benches, and more specifically, relates to a hoisting, positioning, and locking device for an engine attitude test bench. Background Technology

[0002] In the aviation field, the operation of an aircraft engine under zero or heavy load conditions can lead to abnormal operation of the lubrication system, such as insufficient oil, oil sump overflow in the bearing cavity, oil overflow in the gearbox, oil foaming problems, and seal leakage. Therefore, the engine must be verified by a test bench to achieve safe and stable operation.

[0003] Engine attitude testing verifies the engine's, especially its lubrication system, rotor bearings, and support structure, adaptability under extreme flight attitudes. Its performance directly impacts the engine's reliability and safety; therefore, to ensure flight safety, engine attitude testing is essential and is considered a crucial component of the pre-flight structural tests.

[0004] The main equipment of the outdoor engine attitude test stand includes two side connecting frames, a pitch mechanism, a roll mechanism, and other supporting equipment. The pitch and roll mechanisms need to be secured together using fixing devices. However, due to the large weight of the roll mechanism, conventional fixing devices cannot meet its securing requirements, resulting in poor securing performance. Furthermore, during hoisting, collisions or jamming are prone to occur between the roll and pitch mechanisms. Because of the roll mechanism's large weight and potential energy, collisions or jamming during hoisting can easily damage the equipment. Summary of the Invention

[0005] The purpose of this invention is to provide an engine attitude test stand hoisting, positioning, and locking device that provides good fixation and can effectively guide the hoisting process.

[0006] To achieve the above objectives, the present invention provides an engine attitude test stand hoisting, positioning and locking device. The engine attitude test stand includes a pitch mechanism, a roll mechanism rotatably connected to the pitch mechanism and a support frame supporting the pitch mechanism from both sides. The hoisting, positioning and locking device includes a hoisting mechanism, a guide mechanism and a positioning and locking mechanism.

[0007] The hoisting mechanism is mounted on the pitching mechanism and is used to hoist the roll mechanism;

[0008] The guiding mechanism includes a first guiding device disposed on the pitching mechanism and a second guiding device disposed on the roll mechanism. The first guiding device and the second guiding device cooperate to guide the roll mechanism during hoisting.

[0009] The positioning and locking mechanism includes a locking device disposed on the pitch mechanism and a locking member disposed on the roll mechanism. The locking device locks the roll mechanism by locking the locking member.

[0010] Preferably, the locking member is fixedly connected to the rolling mechanism. The locking member includes a rack, and the locking device includes a movable locking head and a drive rod. The movable locking head is provided with a locking tooth that cooperates with the rack. The drive rod is hinged to the movable locking head to drive the movable locking head to move closer to or away from the rack, thereby locking or unlocking the rack.

[0011] Preferably, the locking device further includes pressing devices located on the upper and lower sides of the movable locking head. The pressing device includes a pressing block and a screw jack. The pressing block is slidably connected to the pitch mechanism, and the screw jack is connected to the pressing block to control the sliding of the pressing block to press and fix the movable locking head.

[0012] Preferably, the clamping block has a first inclined surface facing the locking member on the side near the movable locking head, and the movable locking head has a second inclined surface that cooperates with the first inclined surface on the end away from the locking member.

[0013] Preferably, the drive rod is an electric push rod, and the drive rod is installed horizontally, while the screw jack is installed vertically. The screw jack controls the pressing block to slide in the vertical direction, and the pressing block presses the movable locking head from both the top and bottom sides.

[0014] The movable locking head is slidably connected to the pitch mechanism via a horizontal guide rail on the pitch mechanism, and the clamping block is slidably connected to the pitch mechanism via a vertical guide rail on the pitch mechanism.

[0015] Preferably, the rolling mechanism includes two axially distributed connecting frames, each connecting frame including two vertically arranged support beams, and four locking devices and four locking members, each locking member being disposed on one of the support beams, with the positions of the locking devices and the locking members being adapted to each other.

[0016] Preferably, the first guiding device includes a first guide wheel and a first guide surface, the first guide wheel and the first guide surface being disposed on the connecting beam of the pitch mechanism; the second guiding device includes a second guide wheel and a second guide surface, the second guide wheel and the second guide surface being disposed on the support beam; in the axial direction of the roll mechanism, the second guide wheel is located inside the four support beams; in the horizontal radial direction of the roll mechanism, the second guide wheel is located outside the support beams; the position of the first guide surface is adapted to the position of the second guide wheel; in the horizontal radial direction of the roll mechanism, the second guide surface is disposed outside the support beams; and the position of the first guide wheel is adapted to the position of the second guide surface.

[0017] Preferably, the bottom of the first guide surface and the top of the second guide surface are both inclined.

[0018] Preferably, the top of the connecting frame is provided with lifting lugs, the lifting mechanism includes a winch, the winch is connected to the lifting lugs, and there are four winches and four lifting lugs, which are distributed at the four corners of the top of the rolling mechanism.

[0019] The advantages of this invention over the prior art are as follows: By moving the locking head on the pitch mechanism, the locking member on the roll mechanism can be locked. By the cooperation of the locking teeth of the moving locking head and the rack on the locking member, the roll mechanism can be limited at multiple angles, which greatly increases the fixing effect of the roll mechanism.

[0020] Meanwhile, by adding guide wheels and guide surfaces to the pitch and roll mechanism components, the roll mechanism can be guided during assembly, preventing collisions and jamming during hoisting.

[0021] Other features and advantages of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0022] The above and other objects, features and advantages of the present invention will become more apparent from the more detailed description of exemplary embodiments of the invention in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the invention.

[0023] Figure 1 A schematic diagram of the attitude test stand of the present invention is shown.

[0024] Figure 2 An assembly diagram of the attitude test stand of the present invention is shown.

[0025] Figure 3 A schematic diagram of the pitch mechanism structure of the attitude test stand of the present invention is shown.

[0026] Figure 4 A schematic diagram of the roll mechanism structure of the attitude test stand of the present invention is shown.

[0027] Figure 5 A schematic diagram of the positioning and locking mechanism of the engine attitude test stand hoisting and positioning locking device of the present invention is shown.

[0028] Figure 6 A schematic diagram of the hoisting mechanism of the engine attitude test stand hoisting, positioning and locking device of the present invention is shown.

[0029] Figure 7 A schematic diagram of the guide mechanism of the engine attitude test stand hoisting, positioning and locking device of the present invention is shown.

[0030] Figure 8 A side view of the guide mechanism of the engine attitude test stand hoisting, positioning and locking device of the present invention is shown.

[0031] Figure 9 The diagram shows the assembly schematic of the positioning and locking mechanism of the engine attitude test stand hoisting and positioning locking device of the present invention.

[0032] In the diagram: 1. Pitch mechanism; 2. Support frame; 3. Roll mechanism; 1.1. Winch; 1.2. First guide surface; 1.3. First guide wheel; 1.4. Moving locking head; 1.5. Drive rod; 1.6. Screw jack; 1.7. Pressing block; 1.8. Horizontal guide rail; 3.1. Lifting lug; 3.2. Second guide surface; 3.3. Second guide wheel; 3.4. Locking element; 3.5. Connecting frame; 3.6. Support beam. Detailed Implementation

[0033] Preferred embodiments of the invention will now be described in more detail. While preferred embodiments of the invention are described below, it should be understood that the invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the invention will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0034] Reference Appendix Figure 1-9 This embodiment discloses an engine attitude test stand hoisting, positioning and locking device. The engine attitude test stand includes a pitch mechanism 1, a roll mechanism 3 rotatably connected to the pitch mechanism 1 and a support frame 2 supporting the pitch mechanism 1 from both sides. The hoisting, positioning and locking device includes a hoisting mechanism, a guide mechanism and a positioning and locking mechanism.

[0035] The hoisting mechanism is mounted on the pitching mechanism 1 and is used to hoist the roll mechanism 3.

[0036] The guiding mechanism includes a first guiding device disposed on the pitching mechanism 1 and a second guiding device disposed on the rolling mechanism 3. The first guiding device and the second guiding device cooperate to guide the rolling mechanism 3 during hoisting.

[0037] The positioning and locking mechanism includes a locking device disposed on the pitch mechanism 1 and a locking member 3.4 disposed on the roll mechanism 3. The locking device locks the roll mechanism 3 by locking the locking member 3.4.

[0038] Specifically, the support frame 2 is fixedly installed on the ground, and the two ends of the pitch mechanism 1 are rotatably connected to the support frame 2. The main function of the pitch mechanism 1 is to realize the pitch action during the attitude test, bear the weight of the roll mechanism 3, the test piece, etc., and transmit the thrust. The main function of the roll mechanism 3 is to realize the roll action during the attitude test of the test piece, bear the test piece and the pre-mounted frame, and transmit the thrust of the test engine. The roll mechanism 3 and its test piece supporting equipment need to be assembled in the assembly workshop on the ground, and then hoisted onto the pitch mechanism 1 after completion.

[0039] Preferably, the locking member 3.4 is fixedly connected to the rolling mechanism 3. The locking member 3.4 includes a rack. The locking device includes a movable locking head 1.4 and a drive rod 1.5. The movable locking head 1.4 is provided with a locking tooth that cooperates with the rack. The drive rod 1.5 is hinged to the movable locking head 1.4 to drive the movable locking head 1.4 to move closer to or away from the rack, thereby locking or unlocking the rack.

[0040] Specifically, the drive rod 1.5 controls the movement of the locking head 1.4 to press and lock the locking component 3.4. The rack of the locking component 3.4 uses multiple locking teeth to minimize the single-tooth load on the main rack. Utilizing the self-locking characteristic of the wedge block, the rolling mechanism 3 is constrained simultaneously in both the vertical and horizontal directions.

[0041] The drive rod 1.5 is hinged to the movable locking head 1.4. This prevents misalignment between the movable locking head 1.4 and the locking element 3.4. The angle of the movable locking head 1.4 can be adjusted to ensure accurate engagement between the movable locking head 1.4 and the locking element 3.4, thus preventing the drive rod 1.5 from being squeezed.

[0042] Preferably, the locking device further includes pressing devices located on the upper and lower sides of the movable locking head 1.4. The pressing devices include a pressing block 1.7 and a screw jack 1.6. The pressing block 1.7 is slidably connected to the pitch mechanism 1, and the screw jack 1.6 is connected to the pressing block 1.7, controlling the sliding of the pressing block 1.7 to press and fix the movable locking head 1.4. The pressing block 1.7 has a first inclined surface facing the locking member 3.4 on the side near the movable locking head 1.4, and a second inclined surface that cooperates with the first inclined surface is provided at the end of the movable locking head 1.4 away from the locking member 3.4.

[0043] Specifically, the upper and lower clamping blocks 1.7 can press and fix the tail sides of the movable locking head 1.4 after the movable locking head 1.4 locks the locking member 3.4, and apply the weight of the entire rolling mechanism 3 to the movable locking head 1.4. Through the cooperation of the first inclined surface and the second inclined surface, the force direction of the clamping blocks 1.7 can be changed, thereby increasing the fixing effect on the movable locking head 1.4.

[0044] Preferably, the drive rod 1.5 is an electric push rod, and the drive rod 1.5 is installed horizontally, while the screw jack 1.9 is installed vertically. The screw jack 1.9 controls the pressing block 1.7 to slide in the vertical direction, and the pressing block 1.7 presses the movable locking head 1.4 from the upper and lower sides.

[0045] The movable locking head 1.4 is slidably connected to the pitch mechanism 1 via a horizontal guide rail 1.8 set on the pitch mechanism 1, and the clamping block 1.7 is slidably connected to the pitch mechanism 1 via a vertical guide rail set on the pitch mechanism 1.

[0046] Specifically, the rated thrust of the electric push rod is 5 tons, the rated thrust of the screw jack 1.9 is 20 tons, and the horizontal guide rail 1.8 uses two rails with a spacing of 5 mm between them.

[0047] Preferably, the rolling mechanism 3 includes two axially distributed connecting frames 3.5, each connecting frame 3.5 including two vertically arranged support beams 3.6. There are four locking devices and four locking elements 3.4, each locking element 3.4 is provided on one support beam 3.6, and the position of the locking device is adapted to the position of the locking element 3.4.

[0048] Specifically, the support frame 2 supports the rolling mechanism 3, and the locking effect of the locking device on the rolling mechanism 3 can be increased by the four evenly distributed support beams 3.6.

[0049] Preferably, the first guiding device includes a first guide wheel 1.3 and a first guide surface 1.2, which are mounted on the connecting beam of the pitch mechanism 1. The second guiding device includes a second guide wheel 3.3 and a second guide surface 3.2, which are mounted on the support beam 3.6. In the axial direction of the roll mechanism 3, the second guide wheel 3.3 is located inside the four support beams 3.6. In the horizontal radial direction of the roll mechanism 3, the second guide wheel 3.3 is located outside the support beams 3.6. The position of the first guide surface 1.2 is adapted to the position of the second guide wheel 3.3. In the horizontal radial direction of the roll mechanism 3, the second guide surface 3.2 is located outside the support beams 3.6. The position of the first guide wheel 1.3 is adapted to the position of the second guide surface 3.2. The bottom of the first guide surface 1.2 and the top of the second guide surface 3.2 are both inclined.

[0050] Specifically, the design of using a first guide device and a second guide device can guide the roll mechanism 3 in the axial and radial directions of the horizontal plane, preventing the roll mechanism 3 from interfering with other components when entering the pitch mechanism 1. The guide device can reliably limit the roll device in the axial and radial directions of the horizontal direction, ensuring that the roll mechanism 3 can accurately enter the locking device on the pitch platform, preventing the roll mechanism 3 from colliding or getting stuck during the assembly process.

[0051] The inclined guide surface can effectively guide the guide wheel to the corresponding position quickly when the roll mechanism 3 and the pitch mechanism 1 just come into contact.

[0052] Preferably, the top of the connecting frame 3.5 is provided with a lifting lug 3.1, and the lifting mechanism includes a winch 1.1, which is connected to the lifting lug 3.1. There are four winches 1.1 and four lifting lugs 3.1, and the lifting lugs 3.1 are distributed at the four corners of the top of the rolling mechanism 3.

[0053] Specifically, the winch 1.1 synchronously winds up from the top of the rolling mechanism 3, using four-point hoisting, which allows the rolling mechanism 3 to rise smoothly and without tilting during hoisting. At the same time, it can cooperate with the guide device to prevent the rolling mechanism 3 from tilting due to the action of the guide device when it comes into contact with the pitching mechanism 1.

[0054] The hoisting and locking process of this invention is as follows:

[0055] 1. After the rolling mechanism 3 is ready on the ground, position the rolling mechanism 3 directly below the pitching mechanism 1, and connect the four wire rope hooks of the hoisting mechanism to the lifting lugs 3.1 of the rolling mechanism.

[0056] 2. Reference Appendix Figure 6 The four winches of the hoisting mechanism work synchronously to lift the rolling mechanism 3. During this process, the hoisting status of the rolling mechanism 3 is monitored in real time. If any abnormality is found, an emergency stop operation can be performed through the emergency stop button.

[0057] 3.2 The second guide surface of the roll mechanism is hoisted to the position where it just contacts the first guide wheel of the pitch mechanism, such as... Figure 7 At the position shown, the first guide wheel fixed inside the pitch mechanism is in contact with the inclined surface at the top of the roll mechanism connecting frame and is subjected to force. Since the roll mechanism adopts a four-point hoisting method, the roll mechanism will not tilt when subjected to force in one direction. The first guide wheels on both sides can forcefully guide the roll mechanism to the correct position.

[0058] 4. The second guide wheel 3.3 of the roll mechanism is hoisted to the position where it just contacts the first guide surface 1.2 of the pitch mechanism, such as... Figure 8As shown. At this time, the guide ramp fixed to the first guide surface of the pitch mechanism is in contact with the second guide wheel at the top of the roll mechanism and is subjected to force. Since the roll mechanism adopts a four-point hoisting method, the roll mechanism will not tilt when subjected to force in one direction. The ramp located at the bottom of the first guide surface can forcefully guide the roll mechanism to the correct position.

[0059] 5. The rolling mechanism continues to lift. Under the action of the two guide devices, the rolling mechanism is completely inserted into the guide mechanism. A 5mm gap is reserved between the guide wheel and the guide surface to prevent the rolling mechanism from jamming during the movement.

[0060] 6. In order to ensure the accurate positioning of the roll mechanism during the hoisting process and that its attitude changes during the test do not affect the axial and radial movement of the roll mechanism in the pitch mechanism, in addition to considering the positioning and locking of the pitch mechanism after it has rotated to a certain angle, the positioning and locking of the roll mechanism with the pitch mechanism after it has been hoisted to the work position must also be considered.

[0061] 7. In the pitch mechanism, the locking and positioning device for the roll mechanism must have effective positioning and locking capabilities, and this must be achieved through automatic control. The arrangement of the positioning and locking devices for the roll mechanism in the pitch mechanism is as follows: Figure 5 and Figure 9 As shown;

[0062] 8. The final positioning and load-bearing are achieved by engaging the locking teeth of the moving locking head with the rack of the rolling mechanism locking bar;

[0063] 9. Inclined surfaces are machined on the upper and lower surfaces of the movable locking head, which cooperate with the inclined surfaces of the pressing blocks at the upper and lower ends of the locking mechanism to lock the movable locking head and the locking parts.

[0064] 10. In this design, the locking device adopts a multi-tooth structure to minimize the single-tooth load of the rack. When the electric push rod drives the moving locking head to contact the rack, it may not be aligned. Therefore, its two ends are hinged to ensure accurate engagement when the moving locking head contacts the fixed rack, without squeezing the electric push rod device.

[0065] 11. At this point, the hoisting and locking of the rolling mechanism is complete, and other test preparations can be carried out.

[0066] The various embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A hoisting, positioning, and locking device for an engine attitude test stand, the engine attitude test stand comprising a pitch mechanism (1), a roll mechanism (3) rotatably connected to the pitch mechanism, and a support frame (2) supporting the pitch mechanism from both sides, characterized in that, The hoisting positioning and locking device includes a hoisting mechanism, a guiding mechanism and a positioning and locking mechanism. The rolling mechanism (3) includes two axially distributed connecting frames (3.5), and the connecting frames (3.5) include two vertically arranged support beams (3.6). The hoisting mechanism is mounted on the pitching mechanism (1) and is used to hoist the roll mechanism (3); The guiding mechanism includes a first guiding device disposed on the pitching mechanism (1) and a second guiding device disposed on the rolling mechanism (3). The first guiding device and the second guiding device cooperate to guide the rolling mechanism (3) during hoisting. The positioning and locking mechanism includes a locking device disposed on the pitch mechanism (1) and a locking member (3.4) disposed on the roll mechanism (3). The locking device locks the roll mechanism (3) by locking the locking member (3.4). The locking member (3.4) is fixedly connected to the rolling mechanism (3). The locking member (3.4) includes a rack. The locking device includes a movable locking head (1.4) and a drive rod (1.5). The movable locking head (1.4) is provided with a locking tooth that cooperates with the rack. The drive rod (1.5) is hinged to the movable locking head (1.4) to drive the movable locking head (1.4) to move closer to or away from the rack, thereby locking or unlocking the rack. The locking device also includes pressing devices located on the upper and lower sides of the movable locking head (1.4). The pressing devices include pressing blocks (1.7) and screw jacks (1.6). The pressing blocks (1.7) are slidably connected to the pitch mechanism (1), and the screw jacks (1.6) are connected to the pressing blocks (1.7). The pressing blocks (1.7) are controlled to slide and press and fix the movable locking head (1.4). The first guiding device includes a first guide wheel (1.3) and a first guide surface (1.2), which are disposed on the connecting beam of the pitch mechanism (1). The second guiding device includes a second guide wheel (3.3) and a second guide surface (3.2), which are disposed on the support beam (3.6). In the axial direction of the roll mechanism (3), the second guide wheel (3.3) is located inside the four support beams (3.6). In the horizontal radial direction of the roll mechanism (3), the second guide wheel (3.3) is located outside the support beams (3.6). The position of the first guide surface (1.2) is adapted to the position of the second guide wheel (3.3). In the horizontal radial direction of the roll mechanism (3), the second guide surface (3.2) is disposed outside the support beams (3.6). The position of the first guide wheel (1.3) is adapted to the position of the second guide surface (3.2).

2. The engine attitude test stand hoisting, positioning, and locking device according to claim 1, characterized in that, The clamping block (1.7) has a first inclined surface facing the locking member (3.4) on the side near the movable locking head (1.4), and the movable locking head (1.4) has a second inclined surface that cooperates with the first inclined surface on the end away from the locking member (3.4).

3. The engine attitude test stand hoisting, positioning, and locking device according to claim 2, characterized in that, The drive rod (1.5) is an electric push rod, and the drive rod (1.5) is installed horizontally. The screw jack (1.9) is installed vertically. The screw jack (1.9) controls the pressing block (1.7) to slide in the vertical direction. The pressing block (1.7) presses the movable locking head (1.4) from the upper and lower sides. The movable locking head (1.4) is slidably connected to the pitch mechanism (1) via a horizontal guide rail (1.8) provided on the pitch mechanism (1), and the pressing block (1.7) is slidably connected to the pitch mechanism (1) via a vertical guide rail provided on the pitch mechanism (1).

4. The engine attitude test stand hoisting, positioning, and locking device according to claim 1, characterized in that, There are four locking devices and four locking members (3.4). Each locking member (3.4) is located on one of the support beams (3.6). The position of the locking device is adapted to the position of the locking member (3.4).

5. The engine attitude test stand hoisting, positioning, and locking device according to claim 1, characterized in that, The bottom of the first guide surface (1.2) and the top of the second guide surface (3.2) are both inclined.

6. The engine attitude test stand hoisting, positioning, and locking device according to claim 4, characterized in that, The top of the connecting frame (3.5) is provided with a lifting lug (3.1). The hoisting mechanism includes a winch (1.1). The winch (1.1) is connected to the lifting lug (3.1). There are four winches (1.1) and four lifting lugs (3.1). The lifting lugs (3.1) are distributed at the four corners of the top of the rolling mechanism (3).

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