阅读说明：本技术 带浮筒的旋翼航空器水上横向静态稳定性测试装置及方法 (Device and method for testing overwater transverse static stability of rotorcraft with buoys ) 是由 王晓强 李名琦 朱元春 黄艳平 何新强 何帆 杨力 任健 吴建华 刘畅 于 2021-08-30 设计创作，主要内容包括：本发明公开了一种带浮筒的旋翼航空器水上横向静态稳定性测试装置及方法,该装置包括旋翼航空器的缩比模型及等缩比的缩比浮筒、能容纳缩比模型及缩比浮筒的水箱、扶正力矩检测机构；扶正力矩检测机构包括分别设在缩比模型对称中心纵向前后且同轴的前转轴和后转轴,前转轴配合穿过前限位槽后往前依次固连有扭矩传感器和分度盘A,分度盘A往前通过插销和插销孔角度可调的连接有分度盘B,分度盘B往前固连有导向杆,导向杆配合穿过导向槽后与反扭矩组件连接,后转轴与后限位槽配合,前限位槽、导向槽和后限位槽均为竖向槽,导向杆在导向槽内只能上下移动,反扭矩组件用于为导向杆提供与分度盘B相反的扭矩。本发明操作方便,测试简单,适用范围广。(The invention discloses a device and a method for testing the horizontal static stability of a rotorcraft on water, wherein the device comprises a scaling model of the rotorcraft, a scaling buoy with equal scaling, a water tank capable of accommodating the scaling model and the scaling buoy, and a righting moment detection mechanism; righting moment detection mechanism is including establishing respectively at vertical preceding back and coaxial front axle of scaling model symmetric center and back pivot, the front axle cooperation is passed and is linked firmly torque sensor and graduated disk A forward in proper order behind the preceding spacing groove, graduated disk A is connected with graduated disk B through bolt and bolt hole angularly adjustable forward, graduated disk B has linked firmly the guide bar forward, the guide bar cooperation is passed and is connected with anti-torque assembly behind the guide groove, back pivot and back spacing groove cooperation, preceding spacing groove, guide groove and back spacing groove are vertical groove, the guide bar can only reciprocate in the guide groove, anti-torque assembly is used for providing the moment of torsion opposite with graduated disk B for the guide bar. The invention has the advantages of convenient operation, simple test and wide application range.)

1. The utility model provides a take rotor craft horizontal static stability testing arrangement on water of flotation pontoon which characterized in that: the device comprises a scaling model of the rotor craft, a scaling buoy with equal scaling, a water tank capable of accommodating the scaling model and the scaling buoy, and a righting moment detection mechanism; righting moment detection mechanism is including establishing respectively at vertical preceding back and coaxial preceding pivot of scaling model symmetric center and back pivot, preceding pivot cooperation is passed and is linked firmly torque sensor and graduated disk A forward in proper order behind the preceding spacing groove, graduated disk A is connected with graduated disk B through bolt and bolt hole angularly adjustable forward, graduated disk B has linked firmly the guide bar forward, the guide bar cooperation is passed and is connected with anti-torque assembly behind the guide groove, back pivot and back spacing groove cooperation, preceding spacing groove, guide groove and back spacing groove are vertical groove, preceding pivot and back pivot can reciprocate respectively in preceding spacing groove and back spacing groove, the side-to-side rotation, the guide bar can reciprocate in the guide groove and can not the side-to-side rotation, anti-torque assembly is used for providing the moment of torsion opposite with graduated disk B for the guide bar.

2. The device for testing the marine lateral static stability of a rotorcraft having a buoy as set forth in claim 1, wherein: the section of the guide rod is waist-shaped.

3. The device for testing the marine lateral static stability of a rotorcraft having a buoy as set forth in claim 1, wherein: guide rails are arranged on two sides of the guide groove, sliding blocks are matched on the guide rails, and the guide rod penetrates through the sliding blocks on the two sides in a matching mode.

4. The device for testing the marine lateral static stability of a rotorcraft having a buoy as set forth in claim 1, wherein: a plurality of pin holes are symmetrically distributed on the index plate A in the left-right direction, the angle intervals among the pin holes on the same side are equal, and two pin holes which are symmetrically arranged on the index plate B in the left-right direction are arranged on the index plate B.

5. The device for testing the marine lateral static stability of a rotorcraft having a buoy as set forth in claim 1, wherein: the reaction torque assembly comprises a movable pulley, a transmission rope, a balance weight and a connecting plate, the movable pulley is in sliding fit with the transverse guide rail, the transmission rope bypasses the top of the movable pulley, the two ends of the transmission rope are downward, the balance weight is arranged at one end of the transmission rope, the connecting plate is arranged at the other end of the transmission rope, and the guide rod is connected with the connecting plate.

6. The utility model provides a take rotor craft horizontal static stability test method on water of flotation pontoon which characterized in that: use of a buoyed rotorcraft marine lateral static stability test apparatus as claimed in any one of claims 1 to 5, comprising the steps of:

s1, adding water into a water tank to a proper position, then placing a scaling model and a scaling buoy, placing a front rotating shaft into a front limiting groove, placing a rear rotating shaft into a rear limiting groove, forward and sequentially fixedly connecting a torque sensor and an index plate A, placing a guide rod into a guide groove and connecting a counter torque assembly, fixedly connecting the guide rod with an index plate B, connecting the index plate A and the index plate B through a bolt and a bolt hole, and selecting the angle theta of the index plate A and the index plate B according to needs;

s2, adjusting the weight of the balance weight to enable the guide rod to freely move up and down in the guide groove, namely, to be in a torque balance state, reading and recording the readings of the torque sensor after the readings of the torque sensor are stable, and obtaining the righting moment of the scaling model with the scaling buoy at the angle theta;

s3, adjusting the angle theta, and repeating the test to obtain the righting moment of the scaling model with the scaling buoy at different angles theta;

and S4, converting the data measured by the scaling model into rotorcraft roll angle-righting moment data according to the scaling model and rotorcraft moment conversion criterion to form an angle-righting moment curve.

7. The method of testing the lateral static stability of a buoyed rotorcraft on water of claim 6, wherein: if the range of roll angles over which the pontoons can provide a righting moment to the rotorcraft is small or does not meet the requirements of product specifications, the pontoons should be increased in volume or moved outboard in the transverse direction of the rotorcraft to increase the righting moment provided by the pontoons to the rotorcraft.

Technical Field

The invention belongs to the field of test of a rotorcraft, and particularly relates to a device and a method for testing the overwater transverse static stability of the rotorcraft with a buoy.

Background

In order to avoid sinking of the rotorcraft after falling into water, the buoy can be arranged on the rotorcraft, the volume and the installation position of the buoy are very important to the lifesaving effect of the buoy, and in order to provide basis for the design of the volume and the installation position of the buoy, the horizontal static stability of the rotorcraft on water needs to be tested, but the existing testing equipment is complex, the operation difficulty of the test is large, and the application range is limited.

Disclosure of Invention

The invention aims to provide a device and a method for testing the overwater transverse static stability of a rotorcraft with a buoy, which are convenient to install and operate, simple to test, wide in application range and great in guidance effect on the design of the buoy of each type of rotorcraft.

The technical scheme adopted by the invention is as follows:

a device for testing the horizontal static stability of a rotorcraft on water with a buoy comprises a scaling model of the rotorcraft, a scaling buoy with equal scaling, a water tank capable of accommodating the scaling model and the scaling buoy and a righting moment detection mechanism; righting moment detection mechanism is including establishing respectively at vertical preceding back and coaxial preceding pivot of scaling model symmetric center and back pivot, preceding pivot cooperation is passed and is linked firmly torque sensor and graduated disk A forward in proper order behind the preceding spacing groove, graduated disk A is connected with graduated disk B through bolt and bolt hole angularly adjustable forward, graduated disk B has linked firmly the guide bar forward, the guide bar cooperation is passed and is connected with anti-torque assembly behind the guide groove, back pivot and back spacing groove cooperation, preceding spacing groove, guide groove and back spacing groove are vertical groove, preceding pivot and back pivot can reciprocate respectively in preceding spacing groove and back spacing groove, the side-to-side rotation, the guide bar can reciprocate in the guide groove and can not the side-to-side rotation, anti-torque assembly is used for providing the moment of torsion opposite with graduated disk B for the guide bar.

Further, the cross section of the guide rod is waist-shaped.

Furthermore, guide rails are arranged on two sides of the guide groove, sliding blocks are matched on the guide rails, and the guide rod penetrates through the sliding blocks on the two sides in a matching mode.

Furthermore, a plurality of pin holes are symmetrically distributed on the index plate A in the left-right direction, the angle intervals among the pin holes on the same side are equal, and two pin holes which are symmetrically arranged on the index plate B in the left-right direction are arranged on the index plate B.

Further, the reaction torque subassembly includes back shaft and transverse guide sliding fit's movable pulley, walks around the movable pulley top and both ends decurrent driving rope, establishes the counter weight in driving rope one end, establishes the connecting plate at the driving rope other end, and the guide bar is connected with the connecting plate.

A method for testing the overwater transverse static stability of a rotorcraft with a buoy adopts the above test device for testing the overwater transverse static stability of the rotorcraft with the buoy, and comprises the following steps:

s1, adding water into a water tank to a proper position, then placing a scaling model and a scaling buoy, placing a front rotating shaft into a front limiting groove, placing a rear rotating shaft into a rear limiting groove, forward and sequentially fixedly connecting a torque sensor and an index plate A, placing a guide rod into a guide groove and connecting a counter torque assembly, fixedly connecting the guide rod with an index plate B, connecting the index plate A and the index plate B through a bolt and a bolt hole, and selecting the angle theta of the index plate A and the index plate B according to needs;

s2, adjusting the weight of the balance weight to enable the guide rod to freely move up and down in the guide groove, namely, to be in a torque balance state, reading and recording the readings of the torque sensor after the readings of the torque sensor are stable, and obtaining the righting moment of the scaling model with the scaling buoy at the angle theta;

s3, adjusting the angle theta, and repeating the test to obtain the righting moment of the scaling model with the scaling buoy at different angles theta;

and S4, converting the data measured by the scaling model into rotorcraft roll angle-righting moment data according to the scaling model and rotorcraft moment conversion criterion to form an angle-righting moment curve.

Further, if the range of roll angles over which the pontoons can provide a righting moment to the rotorcraft is tested to be small or does not meet the requirements of product specifications, the pontoons should be increased in volume or moved outboard in the transverse direction of the rotorcraft to increase the righting moment provided by the pontoons to the rotorcraft.

The invention has the beneficial effects that:

according to the geometric similarity principle, the scaling design is carried out on the rotor aircraft provided with the buoy, the torque sensor is utilized to test the righting moment of the scaling model under different roll angles, the scaling model test data is converted into the righting moment of the rotor aircraft provided with the buoy under different roll angles, and the critical angle of the scaling model overturning can be obtained through testing, so that the overwater transverse static stability of the rotor aircraft is obtained; in the device, the reaction torque subassembly has played balanced effect, has eliminated the influence of equipment weight, and longitudinal position degree has been ensured with back spacing groove to preceding spacing groove, and the cooperation of guide bar and guide way has guaranteed the accurate measurement of moment of torsion, and index plate A and index plate B make things convenient for the adjustment roll angle, and the device installation, convenient operation, the test is simple, and application scope is wide, to the design of various rotor aircraft flotation pontoon have great guide effect.

Drawings

Fig. 1 is a schematic structural view of a device for testing the lateral static stability on water of a rotorcraft with pontoons according to an embodiment of the present invention (rotors not shown).

Figure 2 is a top view of a floating spar rotorcraft marine lateral static stability test apparatus in an embodiment of the present invention (rotor not shown).

Fig. 3 is a schematic view of a scaling model (rotor not shown) in an embodiment of the invention.

FIG. 4 is a schematic illustration of the installation of the scaling model and scaling buoy (rotor not shown) in an embodiment of the invention.

Fig. 5 is a schematic view of a guide groove in an embodiment of the present invention.

Fig. 6 is a schematic view of an index plate a in an embodiment of the present invention.

Fig. 7 is a schematic view of an index plate B (integral with the guide rod) in an embodiment of the invention.

Fig. 8 is a schematic view showing the installation of the torque sensor, the index plate a, the index plate B, the guide rod, and the guide groove in the embodiment of the present invention.

FIG. 9 is a schematic illustration of a reactive torque assembly in an embodiment of the present invention.

FIG. 10 is a graph of the righting moment for different roll angles for the embodiment of the present invention.

In the figure: 1-a reaction torque assembly; 2-a front limiting groove; 3-front rotating shaft; 4-scaling float bowl; 5-scaling model; 6-rear rotating shaft; 7-rear limiting groove; 8-a water tank; 9-a guide rod; 10-a torque sensor; 11-a guide groove; 12-a guide rail; 13-a slide block; 14-dividing plate A; 15-bolt holes; 16-index plate B; 17-a latch; 18-supporting shaft; 19-a movable pulley; 20-a transverse guide rail; 21-a transmission rope; 22-a connecting plate; 23-counterweight.

Detailed Description

The invention is further described below with reference to the figures and examples.

As shown in fig. 1 to 9, a device for testing the horizontal static stability of a rotorcraft on water with a buoy comprises a scaling model 5 and a scaling buoy 4 with equal scaling of the rotorcraft, a water tank 8 capable of accommodating the scaling model 5 and the scaling buoy 4, and a righting moment detection mechanism; the righting moment detection mechanism comprises a front rotating shaft 3 and a rear rotating shaft 6 which are respectively arranged in the longitudinal front and back of the symmetric center of a scaling model 5 and are coaxial, the front rotating shaft 3 is matched with and penetrates through a front limiting groove 2 and then is sequentially fixedly connected with a torque sensor 10 and an index plate A14 forwards, the index plate A14 is connected with an index plate B16 in an angle-adjustable manner forwards through a bolt 17 and a bolt hole 15, the index plate B16 is fixedly connected with a guide rod 9 forwards, the guide rod 9 is matched with and penetrates through a guide groove 11 and then is connected with a reactive torque assembly 1, the rear rotating shaft 6 is matched with a rear limiting groove 7, the front limiting groove 2, the guide groove 11 and the rear limiting groove 7 are vertical grooves, and the front rotating shaft 3 and the rear rotating shaft 6 can respectively move up and down in the front limiting groove 2 and the rear limiting groove 7, the guide rod 9 can move up and down in the guide groove 11 and cannot rotate left and right, and the anti-torque assembly 1 is used for providing torque opposite to that of the indexing disc B16 for the guide rod 9.

According to the geometric similarity principle, the scaling design is carried out on the rotorcraft provided with the buoy, the torque sensor 10 is utilized to test the righting moments of the scaling model 5 under different roll angles, the test data of the scaling model 5 is converted into the righting moments of the rotorcraft with the buoy under different roll angles, and the critical angle of the scaling model 5 overturning can be obtained through testing, so that the overwater transverse static stability of the rotorcraft is obtained; in the device, reaction torque assembly 1 has played balanced effect, the influence of equipment weight has been eliminated, longitudinal position degree has been ensured to preceding spacing groove 2 and back spacing groove 7, the cooperation of guide bar 9 and guide way 11 has guaranteed the accurate measurement of moment of torsion, graduated disk A14 and graduated disk B16 conveniently adjust the roll angle, the device installation, convenient operation, the test is simple, application scope is wide, design to various rotor craft flotation pontoon has great guide effect.

As shown in fig. 7 and 8, in the present embodiment, the guide bar 9 has a kidney-shaped cross section.

As shown in fig. 5 and 8, in the present embodiment, two sides of the guide groove 11 are guide rails 12, the guide rails 12 are both fitted with sliders 13, and the guide rod 9 is fitted between the sliders 13 on the two sides; the guide rod 9 is attached and limited through the sliding blocks 13 on the two sides, friction can be reduced, and testing operation is facilitated.

As shown in fig. 6 and 7, in this embodiment, a plurality of pin holes 15 are symmetrically distributed on the index plate a14 left and right, the pin holes 15 on the same side are equally spaced in angle, and two pin holes 15 are symmetrically arranged on the index plate B16.

As shown in fig. 9, in the present embodiment, the reactive torque assembly 1 includes a movable pulley 19 having a support shaft 18 slidably engaged with a transverse rail 20, a transmission rope 21 passing over the top of the movable pulley 19 and having two ends facing downward, a counterweight 23 disposed at one end of the transmission rope 21, and a connecting plate 22 disposed at the other end of the transmission rope 21, and the guide rod 9 is connected to the connecting plate 22.

A method for testing the overwater transverse static stability of a rotorcraft with a buoy adopts the above test device for testing the overwater transverse static stability of the rotorcraft with the buoy, and comprises the following steps:

s1, adding water into a water tank 8 to a proper position, then placing a scaling model 5 and a scaling buoy 4, placing a front rotating shaft 3 into a front limiting groove 2, placing a rear rotating shaft 6 into a rear limiting groove 7, fixedly connecting the front rotating shaft 3 forwards with a torque sensor 10 and an index plate A14 in sequence, placing a guide rod 9 into a guide groove 11 and connecting with a counter torque assembly 1, fixedly connecting the guide rod 9 with an index plate B16, connecting the index plate A14 with the index plate B16 through a bolt 17 and a bolt hole 15, and selecting an angle theta of the index plate A14 and the index plate B16 according to needs;

s2, adjusting the weight of the counterweight 23 to enable the guide rod 9 to freely move up and down in the guide groove 11, namely, to be in a torque balance state, reading and recording the readings of the torque sensor 10 after the readings of the torque sensor 10 are stable, and obtaining the righting moment of the scaling model 5 with the scaling buoy 4 at the angle theta;

s3, adjusting the angle theta, and repeating the test to obtain the righting moment of the scaling model 5 with the scaling buoy 4 under different angles theta;

and S4, converting the data measured by the scaling model 5 into the rotorcraft roll angle-righting moment data according to the scaling model 5 and the rotorcraft moment conversion criterion to form an angle-righting moment curve.

As shown in fig. 10, which is a graph of the centralizing moments of some type of rotorcraft with buoys at different roll angles, it can be seen that the centralizing moments of the rotorcraft at about 62 ° left roll and 61 ° right roll are 0, which is the critical overturning angle beyond which the rotorcraft will overturn. Therefore, the horizontal static stability on water of the rotorcraft model with the buoys is obtained, namely the buoys in the state can be in a range of-62 degrees to 61 degrees, the centralizing moment is provided for the rotorcraft, and meanwhile, the centralizing moment reaches an extreme value at the left roll of 22 degrees and the right roll of 21 degrees.

If the range of roll angles over which the pontoons can provide a righting moment to the rotorcraft is small or does not meet the requirements of product specifications, the pontoons should be increased in volume or moved outboard in the transverse direction of the rotorcraft to increase the righting moment provided by the pontoons to the rotorcraft.

It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.