Propeller blade clamping and positioning device

Abstract

The invention discloses a propeller blade clamping and positioning device, and relates to the technical field of clamping and positioning devices.The propeller blade clamping and positioning device comprises an arc-shaped clamping plate and a hoop detachably connected to the inner side wall of the arc-shaped clamping plate; the hoop comprises a lower clamping ring and an upper clamping ring, the lower clamping ring and the upper clamping ring are both semicircular clamping rings, the lower clamping ring is detachably connected to the inner side wall of the arc-shaped clamping plate, one ends of the upper clamping ring and the lower clamping ring are hinged, and the other ends of the upper clamping ring and the lower clamping ring are fastened through a fastener; inner grooves are formed in the inner side walls of the lower clamping ring and the upper clamping ring, and a clamping space is formed between the two inner grooves; the device is simple in structure, convenient to mount and dismount quickly, and capable of quickly realizing clamping and positioning of the blade, thereby meeting the clamping requirements of the blade moment balance test.

Description

Technical Field

[0001] The invention relates to the technical field of clamping and positioning devices, and more particularly to a clamping and positioning device for propeller blades. Background Art

[0002] The propeller is a key component in the power machinery of a rotorcraft. The blade, as the main component of the propeller, mainly provides power (traction or thrust) for the aircraft. At the same time, according to the flight conditions, the angle of the blade needs to be adjusted and the pitch needs to be changed to improve the working efficiency of the propeller.

[0003] As attached Figure 1 As shown, the blade includes a root 91 and a body 92; in order to ensure the flight safety of the aircraft, the blade needs to be torque balanced, and the purpose of balancing is mainly to eliminate propeller vibration and reduce unnecessary energy loss of the engine; the torque balance of the blade is mainly performed on a torque measuring machine, the blade is placed horizontally on the torque measuring machine, and the large and small axis torques of the blade are adjusted to meet the blade torque difference requirements.

[0004] However, there is currently no dedicated blade clamping device. When a torque balance test is required on the blade, the blade cannot be clamped quickly, thereby reducing work efficiency.

[0005] Therefore, how to provide a clamping and positioning device with a simple structure that can quickly clamp the blades and meet the requirements of the blade torque balance test is a problem that technical personnel in this field urgently need to solve. Summary of the invention

[0006] In view of this, the present invention provides a propeller blade clamping and positioning device, aiming to solve the above-mentioned technical problems.

[0007] In order to achieve the above object, the present invention adopts the following technical solution:

[0008] A propeller blade clamping and positioning device, comprising an arc-shaped clamping plate and a clamp detachably connected to the inner side wall of the arc-shaped clamping plate;

[0009] The clamp includes a lower clamping ring and an upper clamping ring, both of which are semicircular clamping rings, and the lower clamping ring is detachably connected to the inner wall of the arc-shaped clamping plate. One end of the upper clamping ring and the lower clamping ring is hinged, and the other end is fastened by a fastener; the inner walls of the lower clamping ring and the upper clamping ring are both provided with inner grooves, and a clamping space is formed between the two inner grooves.

[0010] Through the above technical scheme, the present invention discloses a propeller blade clamping and positioning device, wherein inner grooves are provided on the inner side walls of an upper clamping ring and a lower clamping ring, a clamping space is formed between the two inner grooves, and the root of the propeller blade is installed in the clamping space, one end of the upper clamping ring and the lower clamping ring are hinged, and the other end is fastened by a fastener. The present invention has a simple structure, is convenient for quick installation and disassembly, can quickly realize the clamping and positioning of the blade, and thus meet the clamping requirements of the blade torque balance test.

[0011] Preferably, in the above-mentioned propeller blade clamping and positioning device, the ends of the lower clamping ring are respectively fixed with a first double-piece ear seat and a second double-piece ear seat, and the ends of the upper clamping ring are respectively fixed with a first single-piece ear seat and a second single-piece ear seat; the first double-piece ear seat and the first single-piece ear seat are hinged; the second double-piece ear seat and the second single-piece ear seat are plugged through a latch. The hinge connection of the first double-piece ear seat and the first single-piece ear seat can quickly realize the opening and buckling of the upper clamping ring, and the second double-piece ear seat and the second single-piece ear seat are plugged through a latch. After the blade root is installed, the second double-piece ear seat and the second single-piece ear seat are plugged and fixed through the latch to ensure structural stability and meet usage requirements. When disassembling, the latch is removed to facilitate opening the upper clamping ring and removing the blade root. The structure is simple, easy to operate, and the structure is stable.

[0012] Preferably, in the above-mentioned propeller blade clamping and positioning device, the ends of the lower clamping ring extend to above the top edges of the two sides of the arc-shaped clamping plate. This structural setting allows a gap between the first double-piece ear seat and the first single-piece ear seat and the top edges of the two sides of the arc-shaped clamping plate, which prevents friction when opening and closing the upper clamping ring, facilitates quick opening of the upper clamping ring, and prolongs its service life.

[0013] Preferably, in the above-mentioned propeller blade clamping and positioning device, the arc-shaped clamping plate includes a first arc-shaped surface and a second arc-shaped surface with the same outer diameter and different inner diameters; the lower retaining ring is fastened to the first arc-shaped surface by bolts and pins.

[0014] Preferably, in the above-mentioned propeller blade clamping and positioning device, the inner diameter of the second arc surface is larger than the inner diameter of the first arc surface. This structural setting can reduce the weight of the entire device. If the weight is too heavy, it will affect the accuracy of the blade moment balance data. At the same time, it can ensure the balance of the entire device, thereby improving the accuracy of the blade moment balance data.

[0015] Preferably, in the above-mentioned propeller blade clamping and positioning device, an arc-shaped connecting plate is integrally formed at one end of the second arc-shaped surface away from the connection with the first arc-shaped surface, an annular body arranged perpendicularly thereto is fixed at one end of the arc-shaped connecting plate away from the connection with the second arc-shaped surface, and connecting holes are provided on the side walls of the annular body and the side walls of the arc-shaped connecting plate. The connecting holes provided on the annular body and the arc-shaped connecting plate are respectively connected to the torque measuring machine through fasteners, so that the overall device can be more stably installed on the torque measuring machine.

[0016] Preferably, in the above-mentioned propeller blade clamping and positioning device, the outer diameter of the arc-shaped connecting plate is smaller than the outer diameter of the second arc-shaped surface, and the central axes of the annular body, the arc-shaped connecting plate, the second arc-shaped surface, the first arc-shaped surface, the upper clamping ring and the lower clamping ring coincide. The structure is simple and stable.

[0017] Preferably, in the above-mentioned propeller blade clamping and positioning device, a handle is fixed on the outer side wall of the upper clamping ring. The provision of the handle can facilitate the opening and closing of the upper clamping ring, and is easy to operate.

[0018] It can be seen from the above technical solutions that, compared with the prior art, the present invention discloses a propeller blade clamping and positioning device, which has the following beneficial effects:

[0019] 1. The structure of the present invention is simple and stable, and can realize stable clamping of the blade root, meeting the requirements of blade moment balance test.

[0020] 2. The present invention can facilitate the installation and removal of the propeller root by providing the upper and lower clamping rings, and can quickly realize the clamping and removal of the propeller root.

[0021] 3. The present invention facilitates installation of the entire device on a torque measuring machine by providing an arc-shaped connecting plate and an annular body, provides a stable installation structure, and facilitates completion of a torque balance test of a blade. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0023] Figure 1 The accompanying drawing is a schematic diagram of the structure of a blade in the prior art;

[0024] Figure 2 The attached figure is an axonometric view of the propeller blade clamping and positioning device provided by the present invention

[0025] Figure 3 The accompanying drawing is a front view of the propeller blade clamping and positioning device provided by the present invention;

[0026] Figure 4 The accompanying drawing is a side view of the propeller blade clamping and positioning device provided by the present invention;

[0027] Figure 5 The accompanying drawings are schematic structural diagrams of the arc-shaped clamping plate and the arc-shaped connecting plate provided by the present invention;

[0028] Figure 6 The accompanying drawing is a schematic diagram of the structure of the clamp provided by the present invention;

[0029] Figure 7 The accompanying drawing is a schematic structural diagram of an upper clamping ring provided by the present invention;

[0030] Figure 8 The accompanying drawing is a schematic structural diagram of the lower clamping ring provided by the present invention.

[0031] in:

[0032] 1-Curved splint;

[0033] 11-first arcuate surface; 12-second arcuate surface;

[0034] 2-Lower snap ring;

[0035] 21-first double-piece ear seat; 22-second double-piece ear seat;

[0036] 3- Upper snap ring;

[0037] 31-first single-piece ear seat; 32-second single-piece ear seat; 33-handle;

[0038] 4-Inner groove;

[0039] 5- latch;

[0040] 6-bolts;

[0041] 7-pin;

[0042] 8-arc connecting plate;

[0043] 81- annular body; 82- connecting hole;

[0044] 9-paddle blade;

[0045] 91- oar root; 92- oar body. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] See attached Figure 1 To Attachment Figure 8 , the embodiment of the present invention discloses a propeller blade clamping and positioning device, comprising an arc-shaped clamping plate 1 and a clamp detachably connected to the inner side wall of the arc-shaped clamping plate 1;

[0048] The clamp includes a lower clamping ring 2 and an upper clamping ring 3, both of which are semicircular clamping rings. The lower clamping ring 2 is detachably connected to the inner wall of the arc-shaped clamping plate 1. One end of the upper clamping ring 3 and the lower clamping ring 2 are hinged, and the other end is fastened by a fastener; the inner walls of the lower clamping ring 2 and the upper clamping ring 3 are both provided with inner grooves 4, and a clamping space is formed between the two inner grooves 4.

[0049] In order to further optimize the above technical solution, the central positioning hole of the clamping space formed by the two inner grooves 4 is as follows: Figure 4 As shown, the diameters of Φ1 and Φ2 are different, and the specific diameters can be matched according to the sizes of blade roots of different specifications. This structural setting can ensure the clamping effect while also meeting the requirements for clamping blades of different specifications. There is no need to replace the entire device, only the upper and lower clamping rings of the inner grooves of different diameters need to be replaced. It is simple to operate, saves costs, and can be recycled.

[0050] In order to further optimize the above technical solution, the first double-piece ear seat 21 and the second double-piece ear seat 22 are fixed to the ends of the lower retaining ring 2, and the first single-piece ear seat 31 and the second single-piece ear seat 32 are fixed to the ends of the upper retaining ring 3; the first double-piece ear seat 21 and the first single-piece ear seat 31 are hinged; the second double-piece ear seat 22 and the second single-piece ear seat 32 are connected by a pin 5.

[0051] In order to further optimize the above technical solution, the ends of the lower clamping ring 2 extend to above the top edges of both sides of the arc-shaped clamping plate 1.

[0052] In order to further optimize the above technical solution, the arc-shaped clamping plate 1 includes a first arc-shaped surface 11 and a second arc-shaped surface 12 with the same outer diameter and different inner diameters; the lower clamping ring 2 is fastened to the first arc-shaped surface 11 by bolts 6 and pins 7 .

[0053] In order to further optimize the above technical solution, corresponding pin holes are provided on the first curved surface 11 and the lower retaining ring 2, and the pin 7 fastens the curved clamp plate 1 and the lower retaining ring 2 through the pin holes; a mounting hole is provided on the first curved surface 11, and a threaded hole corresponding to the mounting hole is provided on the lower retaining ring 2. The bolt passes through the mounting hole and is threadedly connected with the threaded hole to fasten the lower open ring 2 and the curved clamp plate 1 to ensure the stability of the structure.

[0054] In order to further optimize the above technical solution, the number of pin holes, mounting holes and threaded holes is the same, and can be multiple, to further ensure a stable connection between the lower clamping ring 2 and the arc-shaped clamping plate 1.

[0055] In order to further optimize the above technical solution, the inner diameter of the second arcuate surface 12 is greater than the inner diameter of the first arcuate surface 11 .

[0056] In order to further optimize the above technical solution, an arc-shaped connecting plate 8 is integrally formed at one end of the second arc-shaped surface 12 away from the end connected to the first arc-shaped surface 11, and an annular body 81 arranged vertically therewith is fixed at one end of the arc-shaped connecting plate 8 away from the end connected to the second arc-shaped surface 12, and connecting holes 82 are provided on the side walls of the annular body 81 and the side walls of the arc-shaped connecting plate 8.

[0057] In order to further optimize the above technical solution, the outer diameter of the arc connecting plate 8 is smaller than the outer diameter of the second arc surface 12, and the central axes of the annular body 81, the arc connecting plate 8, the second arc surface 12, the first arc surface 11, the upper clamping ring 3 and the lower clamping ring 2 coincide.

[0058] In order to further optimize the above technical solution, a handle 33 is fixed on the outer side wall of the upper clamping ring 3 .

[0059] The embodiments of the present invention are:

[0060] Before the torque balance test of blade 9, the upper retaining ring 3 is opened by the handle 33, and then the root 91 of blade 9 is placed in the inner groove 4 of the lower retaining ring 2 to make it fit tightly for positioning. Then, the upper retaining ring 3 is driven to flip 180° by the handle 33 to engage with the lower retaining ring 2, and the second double-piece ear seat 22 and the second single-piece ear seat 32 are plugged through the pin 5 to complete the clamping and positioning of blade 9. At the same time, the connecting hole 82 is fastened to the torque measuring machine through fasteners. After the fastening is completed, the arc connecting plate 8 and the arc clamping plate 1 are driven to rotate by the torque measuring machine, so that the clamp drives the blade 9 to rotate, and the large and small axis torques of blade 9 measured by the torque measuring machine are adjusted to meet the blade torque mutual difference requirements; after the test is completed, the pin 5 is removed, the upper retaining ring 3 is opened by the handle 33, and the blade 9 is taken out, and the next blade to be measured is clamped and positioned, and this cycle is repeated.

[0061] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0062] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A propeller blade clamping and positioning device, characterized in that: It comprises an arc-shaped clamping plate (1) and a clamp detachably connected to the inner side wall of the arc-shaped clamping plate (1); The clamp comprises a lower clamping ring (2) and an upper clamping ring (3), both of which are semicircular clamping rings, and the lower clamping ring (2) is detachably connected to the inner wall of the arc-shaped clamping plate (1), and one end of the upper clamping ring (3) and the lower clamping ring (2) are hinged, and the other end is fastened by a fastener; the inner walls of the lower clamping ring (2) and the upper clamping ring (3) are both provided with inner grooves (4), and a clamping space is formed between the two inner grooves (4).

2. A propeller blade clamping and positioning device according to claim 1, characterized in that: The ends of both ends of the lower clamping ring (2) are respectively fixed with a first double-piece ear seat (21) and a second double-piece ear seat (22), and the ends of both ends of the upper clamping ring (3) are respectively fixed with a first single-piece ear seat (31) and a second single-piece ear seat (32); the first double-piece ear seat (21) and the first single-piece ear seat (31) are hinged; the second double-piece ear seat (22) and the second single-piece ear seat (32) are plugged via a latch (5).

3. A propeller blade clamping and positioning device according to claim 1, characterized in that: The ends of the lower clamping ring (2) extend to above the top edges of both sides of the arc-shaped clamping plate (1).

4. A propeller blade clamping and positioning device according to claim 1, characterized in that: The arc-shaped clamping plate (1) comprises a first arc-shaped surface (11) and a second arc-shaped surface (12) having the same outer diameter and different inner diameters; the lower clamping ring (2) is fastened to the first arc-shaped surface (11) by means of bolts (6) and pins (7).

5. A propeller blade clamping and positioning device according to claim 4, characterized in that: The inner diameter of the second arc-shaped surface (12) is greater than the inner diameter of the first arc-shaped surface (11).

6. A propeller blade clamping and positioning device according to claim 5, characterized in that: An arc-shaped connecting plate (8) is integrally formed at one end of the second arc-shaped surface (12) away from the end connected to the first arc-shaped surface (11); an annular body (81) arranged perpendicularly thereto is fixed to one end of the arc-shaped connecting plate (8) away from the end connected to the second arc-shaped surface (12); and connecting holes (82) are provided on the side walls of the annular body (81) and the side walls of the arc-shaped connecting plate (8).

7. A propeller blade clamping and positioning device according to claim 6, characterized in that: The outer diameter of the arc-shaped connecting plate (8) is smaller than the outer diameter of the second arc-shaped surface (12), and the central axes of the annular body (81), the arc-shaped connecting plate (8), the second arc-shaped surface (12), the first arc-shaped surface (11), the upper retaining ring (3) and the lower retaining ring (2) coincide with each other.

8. A propeller blade clamping and positioning device according to claim 1, characterized in that: A handle (33) is fixed on the outer side wall of the upper clamping ring (3).

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