阅读说明：本技术 一种直升机桨叶动平衡试验台转接头组件及使用方法 (Helicopter blade dynamic balance test bed adapter assembly and use method thereof ) 是由 程翔 高宁波 戴周军 钱栋祥 许漂 刘洋 陈正生 于 2021-08-20 设计创作，主要内容包括：本发明提供了一种直升机桨叶动平衡试验台转接头组件及使用方法。包括转接头主体(1),转接头主体(1)一端为用于匹配安装挥舞支臂(12)的卡爪(13),卡爪(13)上一对相对设置的外爪面(16)相互平行,外爪面(16)上设有贯穿的支臂安装孔(11)；转接头主体(1)另一端为用于匹配安装桨叶(14)的卡槽(17),卡槽(17)上一对相对设置的外槽面(18)相互平行,外槽面(18)上设有贯穿的桨叶安装孔(6)；所述的外爪面与外槽面间存在一夹角,构成转接头扭角(9)。本发明具有操作简便,安装效率高的特点。(The invention provides an adapter assembly of a helicopter blade dynamic balance test bed and a using method. The swing joint comprises a joint main body (1), wherein one end of the joint main body (1) is provided with a claw (13) used for matching and installing a swing arm (12), a pair of outer claw surfaces (16) which are oppositely arranged on the claw (13) are mutually parallel, and the outer claw surfaces (16) are provided with through arm installation holes (11); the other end of the adapter main body (1) is provided with a clamping groove (17) for matching and installing the paddle (14), a pair of outer groove surfaces (18) which are oppositely arranged on the clamping groove (17) are parallel to each other, and the outer groove surfaces (18) are provided with paddle installing holes (6) which penetrate through; an included angle is formed between the outer claw surface and the outer groove surface to form an adapter torsion angle (9). The invention has the characteristics of simple and convenient operation and high installation efficiency.)

1. The utility model provides a helicopter paddle dynamic balance test bench adapter subassembly which characterized in that: the swing joint comprises a joint main body (1), wherein one end of the joint main body (1) is provided with a claw (13) used for matching and installing a swing arm (12), a pair of outer claw surfaces (16) which are oppositely arranged on the claw (13) are mutually parallel, and the outer claw surfaces (16) are provided with through arm installation holes (11); the other end of the adapter main body (1) is provided with a clamping groove (17) for matching and installing the paddle (14), a pair of outer groove surfaces (18) which are oppositely arranged on the clamping groove (17) are parallel to each other, and the outer groove surfaces (18) are provided with paddle installing holes (6) which penetrate through; an included angle is formed between the outer claw surface and the outer groove surface to form an adapter torsion angle (9).

2. A helicopter blade dynamic balance test stand adapter assembly as defined in claim 1 wherein: the straight-cylinder type bushing (10) is embedded in the support arm mounting hole (11).

3. A helicopter blade dynamic balance test stand adapter assembly as defined in claim 1 wherein: and a shoulder bush (5) is embedded in the blade mounting hole (6).

4. A helicopter blade dynamic balance test stand adapter assembly as defined in claim 1 wherein: the adapter body (1) is made of alloy steel.

5. A use method of the helicopter blade dynamic balance test bed adapter assembly according to any one of claims 1 to 4, characterized in that, a general hub is installed on the dynamic balance test bed, the installation interface of the adapter assembly is reserved on the flapping arm of the hub, a corresponding special adapter assembly is designed according to the blade type, one end of the adapter assembly is connected with the flapping arm (12), and the other end is connected with the blade (14), so as to realize the fast switching of the dynamic balance test bed multi-type blade test.

6. The method of using a helicopter blade dynamic balance test stand adapter assembly of claim 5 wherein the steps of:

a. after the jaws (13) of the adapter main body (1) are matched with the flapping arm (12) of the hub of the dynamic balance test bed, the adapter main body (1) is fixed on the flapping arm (12) by penetrating the arm mounting hole (11) through a connecting piece I;

b. after the blades (14) are matched with the clamping grooves (17) of the adapter main body (1), the connecting piece II penetrates through the blade mounting hole (6) to fix the blades (14) on the adapter main body (1), and finally the connection between the blades (14) and the flapping support arms (12) is completed.

7. The method of using a helicopter blade dynamic balance test bed adapter assembly of claim 6 wherein in step a, attachment I uses bolts; when the bolt is fixed, a gasket is padded on the bolt, the nut is screwed down according to preset torque, and the cotter pin is inserted for preventing and loosening.

8. The method of using a helicopter blade dynamic balance test bed adapter assembly of claim 6 wherein in step b, attachment II employs a blade pin (3); during fixing, the paddle pin (3) is inserted, and a paddle pin mounting clip (2) is mounted in an inner hole of the paddle pin (3) after the paddle pin (3) is inserted; the paddle pin mounting clamp (2) is rotated to adjust the position of the paddle pin (3) and align the pin mounting hole at the bottom of the paddle pin (3), so that the pintle (4) is inserted to prevent and prevent loosening.

9. The method for using the adapter assembly of the helicopter blade dynamic balance test bed according to claim 6, wherein in the step b, when the blades (14) are matched, the upper wing surfaces of the blades (14) are horizontally placed upwards, and the height, the levelness and the torsion angle of the blade root of the blades (14) are adjusted, so that the blades (14) can be smoothly inserted into the clamping grooves (17).

Technical Field

The invention belongs to the technical field of helicopter tests and relates to an adapter assembly of a helicopter blade dynamic balance test bed and a using method thereof.

Background

The paddle dynamic balance test bed is special equipment for adjusting the dynamic balance of the paddle, when the paddle is tested on the dynamic balance test bed, if the dynamic balance debugging requirements of multiple types of paddles need to be met, corresponding paddle hubs need to be replaced due to different paddle root installation sizes, and the work load is large and the process is complex. Meanwhile, the precision requirement of the dynamic balance test on the total distance is +/-1', and after the hub is replaced, in order to ensure the mounting precision of the blade, the calibration and the measurement verification of the attack angle of the flapping arm of the hub are required, so that the operability is not strong, and the period is long.

Disclosure of Invention

The purpose of the invention is: the invention aims to provide an adapter assembly of a helicopter blade dynamic balance test bed and a using method. The invention has the characteristics of simple and convenient operation and high installation efficiency.

In order to solve the technical problem, the technical scheme of the invention is as follows: a helicopter blade dynamic balance test bed adapter assembly comprises an adapter main body, wherein one end of the adapter main body is provided with a clamping jaw for matching and installing a waving support arm, a pair of outer jaw surfaces which are oppositely arranged on the clamping jaw are parallel to each other, and a support arm installing hole which penetrates through the outer jaw surfaces is formed in the outer jaw surfaces; the other end of the adapter main body is provided with a clamping groove for matching and installing the paddle, a pair of outer groove surfaces which are oppositely arranged on the clamping groove are parallel to each other, and the outer groove surfaces are provided with paddle installing holes which penetrate through; an included angle is formed between the outer claw surface and the outer groove surface to form an adapter torsion angle.

In the helicopter blade dynamic balance test bed adapter assembly, the straight-cylinder type bushing is embedded in the support arm mounting hole.

In the adapter assembly of the helicopter blade dynamic balance test bed, the shouldering bush is embedded in the blade mounting hole.

In the helicopter blade dynamic balance test bed adapter assembly, the adapter main body is made of alloy steel.

The application method of the adapter assembly of the helicopter blade dynamic balance test bed comprises the following steps: install general propeller hub on the dynamic balance test bench, reserve the installation interface of adapter subassembly on the flapping support arm of propeller hub, according to the special adapter subassembly that the paddle type design corresponds, adapter subassembly one end is connected and is waved the support arm, and the paddle is connected to the other end to realize the experimental fast switch-over of dynamic balance test bench polymorphic type paddle.

Specifically, the application method of the adapter assembly of the helicopter blade dynamic balance test bed comprises the following steps:

a. after the clamping jaws of the adapter main body are matched with the flapping support arms of the dynamic balance test bed hub, the adapter main body is fixed on the flapping support arms by penetrating a connecting piece I through a support arm mounting hole;

b. after the clamping groove of the adapter main body is matched with the paddle, the connecting piece II is used for penetrating through the paddle mounting hole to fix the paddle on the adapter main body, and finally the connection of the paddle and the waving support arm is completed.

In the step a of the using method of the helicopter blade dynamic balance test bed adapter assembly, a bolt is used as a connecting piece I; when the bolt is fixed, a gasket is padded on the bolt, the nut is screwed down according to preset torque, and the cotter pin is inserted for preventing and loosening.

In the step b of the using method of the helicopter blade dynamic balance test bed adapter assembly, a blade pin is adopted as the connecting piece II; during fixing, inserting the paddle pin, and installing a paddle pin installation clip in an inner hole of the paddle pin after the paddle pin is inserted; the paddle pin mounting clamp is rotated to adjust the position of the paddle pin, and the pin mounting hole at the bottom of the paddle pin is aligned, so that the pin is inserted to prevent and prevent loosening.

In the step b of the using method of the adapter assembly for the helicopter blade dynamic balance test bed, when the blades are matched, the upper wing surface of each blade is placed upwards and horizontally, and the height and the levelness of each blade and the torsion angle of each blade root are adjusted, so that the blades can be smoothly inserted into the clamping grooves.

The invention has the technical effects that:

1. the invention can design a special adapter aiming at the difference of the sizes of liner holes of different types of blades, and share a set of universal hub with reserved adapter interfaces, thereby avoiding the repeated assembly and disassembly of the whole set of hub; compared with the traditional test assembly for replacing the propeller hub (needing a week of recalibration), the test assembly method has the advantages that the assembly time is shorter, the test preparation can be completed in about 1 hour (namely, the propeller hub does not need to be calibrated), and the assembly efficiency is greatly improved.

2. According to the invention, through the accurate design of the torsion angle of the adapter, the same set of collective pitch control system can be used when different types of blades are subjected to dynamic balance tests, the adjustment of the attack angle of the waving support arm when the long pull rod is disassembled and assembled is avoided, the machine type replacement time can be greatly reduced, the rapid switching of the machine types of the helicopter blade dynamic balance test is realized, and the assembly efficiency is further improved.

3. The invention has simple assembly, only needs to carry out pin bolt connection, does not need to replace the hub, also does not need to repeatedly carry out hub assembly, omits the operation of carrying out hub disassembly and assembly by matching with a crane, and greatly reduces the assembly difficulty.

4. The invention can improve the open-time rate of the test bed. In the traditional method, in order to improve the test efficiency, a test bed is generally equipped for one type of blade; due to the high interchange efficiency, the paddle test bed can test paddles of various types, and the starting rate of equipment is effectively improved. The turn-on rate of the traditional method is about 40%, and the turn-on rate of the invention can reach 80%.

5. The adapter assembly is directly provided with the adapter torsional angle, the structure can enable the blade pitch angle to be matched with the total pitch angle of the test bed, and further the operation of adjusting the flapping arm attack angle by disassembling and assembling the long pull rod to enable the blade pitch angle to be matched with the total pitch angle of the test bed can be cancelled, so that the test operation process is effectively simplified, and the test operation difficulty is reduced.

6. The method of the invention does not need to adjust the total distance, cancels the total distance adjusting operation for ensuring the +/-1' precision requirement, further simplifies the test operation and reduces the test operation difficulty.

7. The adapter assembly has good designability, can be matched with the connecting part of the paddle according to the sizes of different paddles, supports modes of paddle pin connection, bolt connection and the like, and has low design difficulty and wide application range.

8. The adapter assembly is only about 5kg in weight, light in weight, capable of being replaced independently by a single person, free of matching installation of a crane and convenient to use.

9. The adapter assembly is made of alloy steel materials, has excellent mechanical properties and large strength design margin, and can ensure personal safety and product safety in the dynamic balance test process.

Drawings

FIG. 1 is a schematic view of the construction of the adapter assembly of the present invention;

figure 2 is a cross-sectional view of the socket end of the adapter assembly;

figure 3 is a cross-sectional view of the jaw end of the adapter assembly;

FIG. 4 is a view showing a state of use of the adapter assembly.

Reference numerals: 1-adapter body, 2-blade pin mounting clip, 3-blade pin, 4-pintle, 5-shoulder bushing, 6-blade mounting hole, 7-shoulder bushing hole spacing, 8-shoulder bushing end face spacing, 9-adapter twist angle, 10-straight barrel type bushing, 11-arm mounting hole, 12-waving arm, 13-jaw, 14-blade, 15-arm attack angle measuring surface, 16-external claw surface, 17-neck, 18-external groove surface.

Detailed Description

Example 1. A helicopter blade dynamic balance test bed adapter assembly is shown in figures 1-4 and comprises an adapter body 1, wherein one end of the adapter body 1 is provided with a claw 13 for matching and installing a flapping support arm 12, a pair of outer claw surfaces 16 which are oppositely arranged on the claw 13 are parallel to each other, and the outer claw surfaces 16 are provided with support arm installation holes 11 which penetrate through; the other end of the adapter body 1 is provided with a clamping groove 17 used for matching and installing the paddle 14, a pair of outer groove surfaces 18 which are oppositely arranged on the clamping groove 17 are parallel to each other, and the outer groove surfaces 18 are provided with paddle installing holes 6 which penetrate through; an included angle is formed between the outer claw surface and the outer groove surface to form an adapter torsion angle 9.

The straight-cylinder type bushing 10 is embedded in the mounting hole 11 of the support arm.

The aforementioned blade mounting holes 6 are lined with shoulder bushings 5.

The adapter body 1 is made of alloy steel.

The application method of the adapter assembly of the helicopter blade dynamic balance test bed comprises the following steps: install general propeller hub on the dynamic balance test bench, reserve the installation interface of adapter subassembly on the flapping support arm of propeller hub, according to the special adapter subassembly that the paddle type design corresponds, adapter subassembly one end is connected and is waved support arm 12, and paddle 14 is connected to the other end to realize the experimental fast switch-over of dynamic balance test bench polymorphic type paddle.

The application method of the helicopter blade dynamic balance test bed adapter assembly specifically comprises the following steps:

a. after the claws 13 of the adapter main body 1 are matched with the flapping arms 12 of the dynamic balance test bed hub, the adapter main body 1 is fixed on the flapping arms 12 by using the connecting piece I to penetrate through the arm mounting holes 11;

b. after the blade 14 is matched with the clamping groove 17 of the adapter body 1, the connecting piece II penetrates through the blade mounting hole 6 to fix the blade 14 on the adapter body 1, and finally the connection between the blade 14 and the flapping arm 12 is completed.

In the step a, bolts are used for the connecting pieces I; when the bolt is fixed, a gasket is padded on the bolt, the nut is screwed down according to preset torque, and the cotter pin is inserted for preventing and loosening.

In the step b, the connecting piece II adopts a paddle pin 3; during fixing, the paddle pin 3 is inserted, and the paddle pin mounting clip 2 is mounted in an inner hole of the paddle pin 3 after the paddle pin 3 is inserted; the paddle pin mounting clip 2 is rotated to adjust the position of the paddle pin 3, and the pin mounting hole at the bottom of the paddle pin 3 is aligned, so that the pin 4 is inserted to prevent and prevent loosening.

In the foregoing step b, when the paddle 14 is matched, the upper wing surface of the paddle 14 is placed horizontally, and the height, the levelness, and the twist angle of the root of the paddle 14 are adjusted, so that the paddle 14 can be smoothly inserted into the slot 17.

Example 2. A helicopter blade dynamic balance test bed adapter assembly is shown in figures 1-4, wherein one side of the adapter is connected with a flapping support arm 12 through a screw nut, and the other side of the adapter is connected with a blade through a blade pin 3.

The arm mounting holes 11 are fitted with straight cylindrical bushings 10 whose dimensions and relative positions are matched according to the corresponding fitting dimensions of the hub flapping arms 12.

And a shoulder bush 5 is embedded into the blade pin mounting hole 6 to prevent the blade root from directly contacting with the adapter, and the size and the relative position of the shoulder bush are matched according to the size of the blade bush hole. Specifically, the shoulder bush end face pitch 8 and the shoulder bush hole pitch 7 are matched according to the blade bush end face pitch and the hole pitch, respectively.

The rotary joint torsion angle 9 is calculated according to the swing arm attack angle of the dynamic balance test bed and the torsion angle of the pneumatic sensitive area of the blade, and the total pitch of the dynamic balance test bed is consistent with the total pitch of the blade under the condition that the swing arm attack angle is not adjusted. Wherein the flap arm angle of attack can be measured using one of the outer claw surfaces 16 as the arm angle of attack measuring surface 15.

When the adapter assembly is installed, the support arm and one side of the adapter are waved through the bolt connection, the gasket is placed at the lower end of the bolt, the nut is screwed down according to certain torque, and the split pin is inserted to prevent looseness.

The adapter is made of alloy steel.

When the paddle is installed, the upper wing surface of the paddle is placed horizontally upwards, and the height, the levelness and the torsion angle of the paddle root of the paddle are adjusted, so that the paddle can be smoothly inserted into the adapter. Aligning the blade bushing hole and the adapter blade pin mounting hole, inserting the blade pin 3, and mounting the blade pin mounting clip 2 in the blade pin inner hole. The position of the paddle pin 3 is adjusted by rotation to align with the pin mounting hole at the bottom, so that the pin 4 can be directly inserted and mounted.