Multi-degree-of-freedom mounting and adjusting tool for large air conduit

Abstract

The invention provides a multi-degree-of-freedom mounting and adjusting tool for a large air duct. The multi-degree-of-freedom mounting and adjusting tool comprises a main body frame 1, a front movable frame 2, a rear movable frame 3, a wheel transmission device 4, an adjustable limiting rod 5, a keel pier 6, a pin shaft 7 and a transverse movement transmission device 8. The main body frame 1 is in sliding connection with a T-shaped sliding rail S1 arranged at the bottom through a wheel transmission device 4, and transverse displacement adjustment of the front movable frame 2 and the rear movable frame 3 is achieved through a transverse movement transmission device 8. The adjustable limiting rod 5 is connected with the rear movable frame 3 and the keel pier 6 through a thread structure to form a pitching angle adjusting mechanism. According to the technical scheme, the guide pipe can be adjusted in the up-down direction, the left-right direction, the front-back direction, the pitching direction and the like, installation centering of the large air guide pipe is achieved, and ship loading work is completed.

Description

Technical Field

[0001] The present invention belongs to the technical field of ship manufacturing, and particularly relates to a multi-degree-of-freedom installation and adjustment tooling for a large air duct. Background Art

[0002] Air propellers are mainly used in aircraft and other aviation vehicles, and are also used in hovercraft. As the power to propel the ship forward, to ensure that the ship obtains a relatively high speed, the size of the air propeller is generally made relatively large, and in order to obtain higher thrust. Research shows that adding a duct outside the propeller can increase the thrust by 30 - 35%. Since the air propeller on the ship is relatively large, the peripheral air duct inevitably needs to be very large, resulting in the characteristics of large size and heavy weight of the duct.

[0003] The ducts (ducted fans) on aircraft and other aircraft are small in size, and the installation operation can be completed by using an ordinary crane with the engine integrated in the production workshop. However, on a hovercraft, the duct and the air propeller are two different devices, and they need to be separately installed on the ship at the production site. Lifting the duct with a crane is time-consuming and laborious, greatly affecting the efficiency. At the same time, due to the large size of the duct, lifting the duct with a sling for a long time will affect the shape of the duct. In addition, the sling for lifting the duct has a certain elasticity, and there will be a certain up and down fluctuation during the operation of the crane boom or the gantry truss, affecting the construction operation of the duct.

[0004] Therefore, how to provide a multi-degree-of-freedom installation and adjustment tooling for a large air duct, which can realize the adjustment in the up and down, left and right, front and back, pitch and other directions, realize the alignment of the installation of the large air duct, and complete the ship loading work, has become an urgent technical problem to be solved. Summary of the Invention

[0005] The embodiment of the present invention provides a multi-degree-of-freedom installation and adjustment tooling for a large air duct, which can realize the adjustment in the up and down, left and right, front and back, pitch and other directions, realize the alignment of the installation of the large air duct, and complete the ship loading work.

[0006] In the embodiment of the present invention, a multi-degree-of-freedom installation and adjustment tooling for a large air duct is provided, including: a main frame 1, a front movable frame 2, a rear movable frame 3, a wheel drive device 4, an adjustable limiting rod 5, a keel block 6, a pin shaft 7 and a lateral movement drive device 8.

[0007] The main frame 1 is slidably connected to the T-shaped slide rail S1 arranged at the bottom through the wheel drive device 4, and the front movable frame 2 and the rear movable frame 3 respectively realize the lateral displacement adjustment through the lateral movement drive device 8;

[0008] The adjustable limiting rod 5 is connected to the rear movable frame 3 and the keel block 6 through a threaded structure to form a pitch angle adjustment mechanism.

[0009] Further, the T-shaped guide rail S1 is fixedly welded to the ship deck. The guide rail material of the T-shaped guide rail S1 is consistent with the hull structure, and the guide rail surface is provided with a wear-resistant coating.

[0010] Further, the wheel drive device 4 includes: a height adjustment mechanism, a clamp, and a guide wheel;

[0011] The height adjustment mechanism adopts double-screw coordinated adjustment. The clamp is provided with a graphite lubricating layer, and the guide wheel is connected to a rotatable lever through a pin shaft 7.

[0012] Further, the adjustable limiting rod 5 adopts a bidirectional thread structure, including: a large-end internal thread tube 5a and a small-end external thread tube 5b. The adjustable limiting rod 5 realizes stepless length adjustment through thread meshing, and the adjustment accuracy is ±0.5 mm.

[0013] Further, the lateral movement drive device 8 includes: a precision ball screw and a self-lubricating bushing;

[0014] Both ends of the precision ball screw are connected to the main body frame 1 through adjustable bushings. The surface of the precision ball screw is nitrided, and the stroke control accuracy is ±1 mm.

[0015] Further, the keel block 6 is provided with a profiling limiting structure, including: a replaceable wooden block and a three-dimensional curved surface limiting block. The profile of the replaceable wooden block matches the outer contour of the air duct, and the three-dimensional curved surface limiting block adopts a modular splicing design.

[0016] Further, the bottom parts of the front movable frame 2 and the rear movable frame 3 are respectively provided with a composite wear-resistant layer structure. This wear-resistant layer structure is composed of a 45# steel matrix and a PTFE composite material, with a friction coefficient ≤0.12 and a thickness of 8 mm - 10 mm.

[0017] Further, the tooling further includes: a multi-degree-of-freedom linkage control system;

[0018] The multi-degree-of-freedom linkage control system includes: a laser alignment instrument and a hydraulic synchronous drive mechanism; the laser alignment instrument is linked with the adjustment mechanism of the adjustable limiting rod 5 to realize automatic alignment of the duct axis.

[0019] The beneficial effects brought by the present invention are as follows:

[0020] As can be seen from the above solution, the embodiment of the present invention provides a multi-degree-of-freedom installation and adjustment tooling for a large air duct, including: a main body frame 1, a front movable frame 2, a rear movable frame 3, a wheel drive device 4, an adjustable limiting rod 5, a keel pier 6, a pin shaft 7, and a lateral movement drive device 8. The main body frame 1 is slidably connected to the T-shaped slide rail S1 arranged at the bottom through the wheel drive device 4, and the front movable frame 2 and the rear movable frame 3 respectively realize lateral displacement adjustment through the lateral movement drive device 8; the adjustable limiting rod 5 is connected to the rear movable frame 3 and the keel pier 6 through a threaded structure to form a pitch angle adjustment mechanism. The technical solution of the present invention can realize the adjustment in the up and down, left and right, front and back, pitch and other directions of the duct, realize the installation centering of the large air duct, and complete the ship loading work. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 FIG. 6 is a first structural schematic diagram of a multi-degree-of-freedom installation and adjustment tooling for a large air duct according to an embodiment of the present invention;

[0022] Figure 2 FIG. 10 is a second structural schematic diagram of a multi-degree-of-freedom installation and adjustment tooling for a large air duct according to an embodiment of the present invention;

[0023] In the figure, 1 is the main body frame, 2 is the front movable frame, 3 is the rear movable frame, 4 is the adjustable limiting rod, 5 is the wheel drive device, 6 is the keel pier, 7 is the pin shaft, and 8 is the lateral movement device. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0025] As Figure 1 and Figure 2 shown, Figure 1 FIG. 6 is a first structural schematic diagram of a multi-degree-of-freedom installation and adjustment tooling for a large air duct according to an embodiment of the present invention, Figure 2 FIG. 10 is a second structural schematic diagram of a multi-degree-of-freedom installation and adjustment tooling for a large air duct according to an embodiment of the present invention.

[0026] In the figure, a multi-degree-of-freedom installation and adjustment tooling for a large air duct includes: a main body frame 1, a front movable frame 2, a rear movable frame 3, a wheel drive device 4, an adjustable limiting rod 5, a keel pier 6, a pin shaft 7, and a lateral movement drive device 8.

[0027] The main body frame 1 is slidably connected to the T-shaped slide rail S1 arranged at the bottom through a wheel transmission device 4, and the front movable frame 2 and the rear movable frame 3 respectively realize the lateral displacement adjustment through a lateral movement transmission device 8. The main body frame 1 is formed by welding, and the horizontal levels of the front and rear movable frames need to be ensured during the welding process. On the left and right sides of the main body frame 1, bushing holes of the lateral movement device are also provided, and the coaxiality needs to be ensured to avoid jamming.

[0028] The adjustable limiting rod 5 is connected to the rear movable frame 3 and the keel pier 6 through a threaded structure to form a pitching angle adjustment mechanism.

[0029] In an embodiment of the present invention, the front movable frame 2 includes: an I-beam, plates, T-profiles, angle steels, etc., and the main material is Q235A. A pin ear plate connected to the keel pier is provided above the front frame. Since the frame needs to realize the lateral movement adjustment function on the main body frame, wear-resistant materials are fixed at the bottom with countersunk head screws. Wear-resistant steel or ordinary 45# can be used, and grease or lubricating graphite is applied to the bottom. A pin shaft hole is provided at the bottom of the frame to realize the connection function with the lateral movement device.

[0030] Among them, the ear plate connection holes of the front movable frame 2 for installing the keel pier are reamed to ensure coaxiality and avoid jamming. For the part where the wear-resistant material is installed at the bottom, the deformation is controlled during manufacturing, or after the overall manufacturing, it is turned flat by a lathe.

[0031] The rear movable frame 3 includes: an I-beam, plates, T-profiles, angle steels, and the main material is Q235A. A pin ear plate of the adjustable limiting rod is provided above the rear frame. Since the frame needs to realize the lateral movement adjustment function on the main body frame, wear-resistant materials are fixed at the bottom with countersunk head screws. Wear-resistant steel or ordinary 45# can be used, and grease or lubricating graphite is applied to the bottom. A pin shaft hole is provided at the bottom of the frame to realize the connection function with the lateral movement device.

[0032] The ear plate connection holes of the rear movable frame 3 for installing the adjustable limiting rod are reamed with the adjustable limiting rod to ensure coaxiality and avoid jamming during rotation. For the part where the wear-resistant material is installed at the bottom, the deformation is controlled during manufacturing, or after the overall manufacturing, it is turned flat by a lathe.

[0033] In an embodiment of the present invention, the T-shaped guide rail S1 is welded and fixed to the ship deck. The guide rail material of the T-shaped guide rail S1 is consistent with the hull structure, and a wear-resistant coating is provided on the guide rail surface.

[0034] In an embodiment of the present invention, the wheel transmission device 4 includes: a height adjustment mechanism, a clamp, and a guide wheel;

[0035] The height adjustment mechanism adopts the coordinated adjustment of double screws. The clamp is provided with a graphite lubricating layer, and the guide wheel is connected to a rotatable lever through a pin shaft 7.

[0036] In the embodiment of the present invention, the number of the wheel transmission devices 4 is 4 sets, which are composed of a housing, a height adjustment rod, a wheel, a clamp, etc., and the material is 20#. There are bolt holes provided in the upper part of the wheel transmission device, and it is connected to the main frame through bolts. Both the housing and the lever are formed by welding plates, and bushings are provided thereon to facilitate the installation of shaft parts. There is a wheel shaft installation hole in the middle of the lever to facilitate the connection of the wheel to the lever through a shaft. The lever and the housing are connected by a shaft, and the two can rotate relative to each other.

[0037] Among them, when the wheel transmission device 4 is assembled, all rotating parts are lubricated with anti-wear grease to ensure that the rotating parts can rotate flexibly without jamming.

[0038] A clamp is provided on the left side of the housing. After adjustment in place, it is clamped with the guide rail through the clamp to prevent movement. The height adjustment of the clamp mainly relies on the rotation of the screw numbered 10 to adjust the height of the clamp. A screw is provided at the right end of the housing, and the screw passes through the pin shaft numbered 20 with internal threads. By rotating the part numbered 9, the distance between the wheel and the housing is adjusted to realize the height adjustment of the main frame.

[0039] In an embodiment of the present invention, the adjustable limiting rod 5 adopts a double-thread structure, including: a large-end internal thread tube 5a and a small-end external thread tube 5b. The adjustable limiting rod 5 realizes stepless adjustment of the length through thread engagement, and the adjustment accuracy is ±0.5 mm.

[0040] In the embodiment of the present invention, the number of the adjustable limiting rods 5 is 4; a thread structure is provided inside each of them. The upper ear plate is welded to the short tube with external threads at the small end, and the bottom is welded to the short tube with internal threads at the large end by an ear plate. After welding, pin holes are drilled on the ear plate. The main material of the adjustable limiting rod is 20#, and the adjustable limiting rod relies on the threads in the large end and the small end to realize the inclination adjustment of the keel pier.

[0041] In an embodiment of the present invention, the lateral movement transmission device 8 includes: a precision ball screw and a self-lubricating bushing;

[0042] Both ends of the precision ball screw are connected to the main frame 1 through adjustable bushings. The surface of the precision ball screw is nitrided, and the stroke control accuracy is ±1 mm.

[0043] In the embodiment of the present invention, the number of the lateral movement transmission devices 8 is 2 sets, which are respectively connected to the front and rear movable frames. There are screws provided on them, and the main material is 20#. The lateral movement device is connected to the main frame through bolts, and the bushings at both ends pass through the openings on both sides of the main frame. The part numbered 2 is respectively connected to the pre-opened holes in the front and rear movable frames to realize the connection between the lateral movement device and the front and rear movable frames.

[0044] Among them, when both ends of the lateral movement device 8 are connected to the main frame, the coaxiality of the screw can be adjusted by the installation position of the bushing to avoid bending deformation of the screw during use and affecting its function.

[0045] In one embodiment of the present invention, the keel block 6 is provided with a profiling limiting structure, including: replaceable fenders and three-dimensional curved surface limiting blocks. The profile of the replaceable fenders matches the outer profile of the air duct, and the three-dimensional curved surface limiting blocks adopt a modular splicing design.

[0046] In the embodiment of the present invention, the number of keel blocks 6 is 2 sets: divided into left and right parts, mainly made of welded main I-beams and angle steels, with limiting blocks for placing fenders welded with angle steels thereon. The main material is Q235A, and fenders that fit the profile of the duct are arranged inside the limiting blocks. Ear plates are respectively provided on the left and right sides of the keel block. The left side is connected to the upper ear plate of the adjustable limiting plate through a pin shaft, and the right side is connected to the front movable frame through a pin shaft. Among them, the connection holes between the ear plates and other components are pre-opened, and during assembly, the drilling is completed in place. The pin shaft is lubricated during installation. The fenders inside the limiting blocks on the keel block are cut according to the profile of the duct to avoid uneven stress on the duct.

[0047] In one embodiment of the present invention, composite wear-resistant layer structures are respectively provided at the bottoms of the front movable frame 2 and the rear movable frame 3. The wear-resistant layer structure is composed of a 45# steel matrix and a PTFE composite material, with a friction coefficient ≤ 0.12 and a thickness of 8 mm - 10 mm.

[0048] In one embodiment of the present invention, the tooling further includes: a multi-degree-of-freedom linkage control system;

[0049] The multi-degree-of-freedom linkage control system includes: a laser alignment instrument and a hydraulic synchronous drive mechanism; the laser alignment instrument is linked with the adjustment mechanism of the adjustable limiting rod 5 to achieve automatic alignment of the duct axis.

[0050] In the embodiment of the present invention, a multi-degree-of-freedom installation and adjustment tooling for a large air duct, its working process includes:

[0051] The bottom slide rails are welded to the hull structure to ensure the upper surface is horizontal, control the rail spacing, and ensure that the center distance between the rails is consistent with the center spacing of the wheels of the wheel drive device;

[0052] Lift the adjustment platform onto the slide rails and lock the adjustment platform through the clamp. Lift the air duct onto the keel fenders on the adjustment platform, and wind rubber or soft material around the limiting rod at the front of the main frame to protect the duct from being damaged by extrusion;

[0053] Loosen the clamp, and push the duct and the adjustment platform to the designated position through the towing rope or manpower, and then lock it with the locking device;

[0054] Rotate the screws on the 4 wheel drive devices to adjust the height of the installation platform, and check whether the center position of the duct meets the specified height requirements;

[0055] Rotate the screws on the two lateral moving devices to adjust the lateral position of the platform, and check whether the center of the conduit reaches the specified dimensional requirements;

[0056] Fine-tune the four adjustable limiting rods to adjust the pitching angle of the keel block, so as to realize the pitching angle adjustment of the conduit.

[0057] The technical solution of the present invention, a multi-degree-of-freedom installation and adjustment tool for a large air conduit, eliminates the restriction of external crane or overhead crane resources, avoids using slings to hoist the conduit for a long time, which may cause deformation of the conduit, and avoids the vertical movement of the conduit caused by the elastic deformation of the sling and the crane or overhead crane itself. The adjustment platform has adjustment functions in multiple directions. In addition to the six degrees of freedom of front-back, left-right, and up-down, a pitching angle adjustment function is also added. The adjustment platform can quickly and accurately adjust the centering installation of the conduit. Only a small number of rotating and moving parts of the adjustment platform need to be maintained, and the cycle is short. The adjustment platform is connected by bolts, which is convenient for disassembly and assembly; the materials used for the adjustment platform are relatively conventional, easy to obtain, and the manufacturing cost is low.

[0058] The embodiment of the present invention provides a multi-degree-of-freedom installation and adjustment tool for a large air conduit, including: a main body frame 1, a front movable frame 2, a rear movable frame 3, a wheel drive device 4, an adjustable limiting rod 5, a keel block 6, a pin shaft 7, and a lateral movement drive device 8. The main body frame 1 is slidably connected to the T-shaped slide rail S1 arranged at the bottom through the wheel drive device 4, and the front movable frame 2 and the rear movable frame 3 respectively realize lateral displacement adjustment through the lateral movement drive device 8; the adjustable limiting rod 5 is connected to the rear movable frame 3 and the keel block 6 through a threaded structure to form a pitching angle adjustment mechanism. The technical solution of the present invention can realize the adjustment of the conduit in the directions of up-down, left-right, front-back, pitching, etc., realize the centering installation of the large air conduit, and complete the ship loading work.

[0059] The above are the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can still be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A multi-degree-of-freedom installation and adjustment tool for a large air duct, characterized in that: The tooling comprises: a main frame (1), a front movable frame (2), a rear movable frame (3), a wheel transmission device (4), an adjustable limiting rod (5), a keel pier (6), a pin shaft (7) and a lateral movement transmission device (8); The main frame (1) is slidably connected to a T-shaped slide rail (S1) arranged at the bottom via a wheel transmission device (4), and the front movable frame (2) and the rear movable frame (3) are respectively lateral displacement-adjusted via the lateral movement transmission device (8); The adjustable limiting rod (5) is connected to the rear movable frame (3) and the keel pier (6) via a threaded structure to form a pitch angle adjustment mechanism.

2. A multi-degree-of-freedom installation and adjustment tool for a large air duct according to claim 1, characterized in that: The T-shaped guide rail (S1) is welded and fixed to the ship deck; the guide rail material of the T-shaped guide rail (S1) is consistent with the hull structure; and a wear-resistant coating is provided on the surface of the guide rail.

3. The multi-degree-of-freedom installation and adjustment tool for a large air duct according to claim 1, characterized in that: The wheel transmission device (4) comprises: a height adjustment mechanism, a clamp and a guide wheel; The height adjustment mechanism adopts double screws for coordinated adjustment, the clamp is provided with a graphite lubricating layer, and the guide wheel is connected to a rotatable lever via a pin shaft (7).

4. The multi-degree-of-freedom installation and adjustment tool for a large air duct according to claim 1, characterized in that: The adjustable limiting rod (5) adopts a bidirectional thread structure, comprising: a large-end internal threaded tube (5a) and a small-end external threaded tube (5b). The adjustable limiting rod (5) can achieve stepless length adjustment through threaded engagement, with an adjustment accuracy of ±0.5 mm.

5. The multi-degree-of-freedom installation and adjustment tool for a large air duct according to claim 1, characterized in that: The lateral movement transmission device (8) comprises: a precision ball screw and a self-lubricating bushing; Both ends of the precision ball screw are connected to the main frame (1) via adjustable bushings; the surface of the precision ball screw is nitrided, and the stroke control accuracy is ±1 mm.

6. The multi-degree-of-freedom installation and adjustment tool for a large air duct according to claim 1, characterized in that: The keel pier (6) is provided with a contour-based limiting structure, comprising: a replaceable pier wood and a three-dimensional curved surface limiting block, the line shape of the replaceable pier wood matches the outer contour of the air duct, and the three-dimensional curved surface limiting block adopts a modular splicing design.

7. The multi-degree-of-freedom installation and adjustment tool for a large air duct according to claim 1, characterized in that: The bottoms of the front movable frame (2) and the rear movable frame (3) are respectively provided with a composite wear-resistant layer structure, which is composed of a 45# steel matrix and a PTFE composite material, has a friction coefficient of ≤0.12, and a thickness of 8mm-10mm.

8. The multi-degree-of-freedom installation and adjustment tool for a large air duct according to claim 1, characterized in that: The tooling also includes: a multi-degree-of-freedom linkage control system; The multi-degree-of-freedom linkage control system comprises: a laser centering instrument and a hydraulic synchronous drive mechanism; the laser centering instrument is linked with the adjustment mechanism of the adjustable limiting rod (5) to achieve automatic centering of the catheter axis.

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