阅读说明：本技术 一种直升机悬臂磁探杆 (Helicopter cantilever magnetic probe rod ) 是由 喻于欣 张楠 李生伟 秦鹏 顾磊 王影 于 2020-10-30 设计创作，主要内容包括：本发明属于直升机结构设计技术,涉及一种用于直升机的悬臂磁探杆。所述直升机悬臂磁探杆包括前段探杆、中段探杆、后段探杆、连接件、口盖、前罩、后罩、拉杆组件。所述前段探杆、中段探杆和后段探杆通过连接件顺次连接在一起,前罩和后罩分别设置在前段探杆前端和后段探杆末端,所述前段探杆、中段探杆上用于设置电磁探测设备的若干位置开口处分别设置有口盖,所述后段探杆与连接件临近的前端设置有与机身连接的拉杆组件。本发明悬臂磁探杆解决了大长径比悬臂结构件的设计难点,降低了结构重量,改善了装配工艺性,缩短加工周期,降低了成本,与机体连接采用螺栓连接形式,可实现探杆的快速安装、维护和拆卸。(The invention belongs to the structural design technology of helicopters, and relates to a cantilever magnetic probe rod for a helicopter. The helicopter cantilever magnetic probe comprises a front section probe rod, a middle section probe rod, a rear section probe rod, a connecting piece, a cover cap, a front cover, a rear cover and a pull rod assembly. The front section probe rod, the middle section probe rod and the rear section probe rod are sequentially connected together through a connecting piece, the front cover and the rear cover are respectively arranged at the front end of the front section probe rod and the tail end of the rear section probe rod, a plurality of position openings used for arranging electromagnetic detection equipment on the front section probe rod and the middle section probe rod are respectively provided with a covering cap, and a pull rod assembly connected with a machine body is arranged at the front end of the rear section probe rod close to the connecting piece. The cantilever magnetic probe rod solves the design difficulty of a cantilever structural member with a large length-diameter ratio, reduces the structural weight, improves the assembly manufacturability, shortens the processing period, reduces the cost, adopts a bolt connection mode when being connected with a machine body, and can realize the quick installation, maintenance and disassembly of the probe rod.)

1. A helicopter cantilever magnetic probe rod is characterized by comprising a front section probe rod (1), a middle section probe rod (2), a rear section probe rod (3), a connecting piece (4), a cover (5), a front cover (6), a rear cover (7), a pull rod assembly (8) and a connecting joint assembly (9), wherein the front section probe rod (1), the middle section probe rod (2) and the rear section probe rod (3) are sequentially connected together through a connecting piece (4), a front cover (6) and a rear cover (7) are respectively arranged at the front end of the front section probe rod (1) and the tail end of the rear section probe rod (3), a plurality of openings at positions for arranging the electromagnetic detection equipment on the front section probe rod (1) and the middle section probe rod (2) are respectively provided with a cover (5), the front end that back end probe rod (3) and connecting piece (4) are close to is provided with pull rod assembly (8) be connected with the fuselage, and the back end is provided with two attach fitting subassembly (9) be connected with the fuselage in back end probe rod (3).

2. The helicopter cantilever magnetic probe according to claim 1, characterized in that, the inside of the front cover (6) is provided with a bracket (10) made of nylon, the front section probe (1) and the middle section probe (2) are respectively provided with a bracket (11) made of nylon, and the aeromagnetic detection equipment is installed on the bracket (10) and the bracket (11).

3. The helicopter cantilever magnetic probe according to claim 1, characterized in that the connection joint assembly (9) is a pipe clamp type structure, which is composed of an upper joint (12) and a lower joint (13) and is screwed together, wherein the lower joint (13) is riveted with the rear section probe (3), and the upper joint (12) is provided with a gap and is bonded with a rubber gasket.

4. The helicopter cantilever magnetic probe according to claim 1, characterized in that the front section probe (1), the middle section probe (2), the rear section probe (3) and the connecting piece (4) are all in the structural form of composite material laminated plate, but different composite materials and theoretical thicknesses are adopted, so that the front part of the whole structure is thinner, and the rear part is thicker.

5. The helicopter cantilever magnetic probe according to claim 4, characterized in that the material of the front section probe (1) is a medium temperature cured epoxy glass cloth prepreg with a thickness of 1.2-1.8 mm; the middle section probe rod (2) is made of medium-temperature cured epoxy carbon fiber unidirectional prepreg with a large modulus and is 2.0-2.5 mm thick; the rear section probe rod (3) is made of medium-temperature cured epoxy carbon fiber unidirectional prepreg with a large modulus and is 3.0-3.5 mm thick; the connecting piece (4) is made of a medium-temperature curing epoxy carbon fiber unidirectional prepreg with a large modulus, and the thickness of the prepreg is 4.0-4.5 mm.

6. A helicopter cantilever magnetic probe according to claim 5 wherein the plies of the front section probe (1), the middle section probe (2), the rear section probe (3) and the connector (4) are designed such that 0 degree plies account for two thirds of the total number of plies and 45 degree plies account for one third of the total number of plies, wherein the 0 degree direction is consistent with helicopter heading.

7. The helicopter cantilever magnetic probe according to claim 6, characterized by that, the copper strips are laid in the 0 degree layer of the front section probe (1), the middle section probe (2), the rear section probe (3) and the connecting piece (4).

8. A helicopter cantilever magnetic probe according to claim 7, characterized in that the flap (5), the front cover (6) and the rear cover (7) are all made of composite material, wherein the material of the front cover (6) is identical to that of the front section probe (1) and the material of the flap (5) and the rear cover (7) is identical to that of the middle section probe (2).

9. The helicopter cantilever magnetic probe according to claim 1, characterized in that the bolts, nuts, rivets and washers required for screwing the front section probe (1), the middle section probe (2), the rear section probe (3), the front cover (6), the rear cover (7) and the flap (5) are made of nonmagnetic metal materials.

10. The helicopter cantilever magnetic probe according to claim 1, characterized in that the cantilever magnetic probe is a cylinder, the cantilever length is not less than 6 meters, but the diameter is not more than 0.3 meters, the main structure of the tie rod assembly (8) arranged between the middle and rear part of the cantilever and the machine body structure is formed by riveting a steel pipe and a double-fork lug joint, and then screwing the steel pipe and the single-fork lug joint.

Technical Field

The invention belongs to the structural design technology of helicopters, and relates to a cantilever magnetic probe rod for a helicopter.

Background

In order to meet the requirements of marine geological security engineering and homeland resource investigation and the requirements of a Chinese homeland resource aviation geophysical prospecting remote sensing center on the customization of an AC312E type helicopter on installation of aeromagnetic measurement task equipment, electromagnetic detection equipment needs to be additionally installed on the lower portion of an AC312E type helicopter belly to execute an aeromagnetic detection task.

However, the number of airborne electromagnetic detection devices is small, and the existing airborne electromagnetic devices mainly adopt a hanging coil structure, such as a hanging helicopter time domain aeromagnetic detection pod described in CN201610161194.2, however, the electromagnetic detection device of this type has a complex structure and a large volume, and has a large influence on the aerodynamics of the helicopter, and particularly in the normal flight process of the helicopter, the airborne electromagnetic detection device is easily influenced by airflow, the stability is low, and the detection precision is low.

Disclosure of Invention

The purpose of the invention is as follows: the helicopter cantilever magnetic probe rod is good in stability and high in measurement precision.

The technical scheme of the invention is as follows: the utility model provides a helicopter cantilever magnetic probe rod, its includes anterior segment probe rod 1, middle section probe rod 2, back end probe rod 3, connecting piece 4, flap 5, front shroud 6, back shroud 7, pull rod assembly 8, connector assembly 9, wherein, anterior segment probe rod 1, middle section probe rod 2 and back end probe rod 3 link together in order through connecting piece 4, and front shroud 6 and back shroud 7 set up respectively at 1 front end of anterior segment probe rod and 3 ends of back end probe rod, a plurality of positions opening part that are used for setting up electromagnetic detection equipment on anterior segment probe rod 1, the middle section probe rod 2 are provided with flap 5 respectively, the front end that back end probe rod 3 and connecting piece 4 closed on is provided with the pull rod assembly 8 of being connected with the fuselage, and the back end is provided with two connector assembly 9 of being connected with the fuselage in the back end probe rod 3.

The inside bonding of front shroud 6 is provided with the support 10 that the material is nylon, bonding material is nylon's support 11 on anterior segment probe rod 1 and the middle-stage probe rod 2 respectively, and aeromagnetic detection equipment installs on support 10 and support 11. The bracket made of the nylon material is made of a non-magnetic material, so that the precision of electromagnetic detection equipment cannot be influenced.

The connecting joint assembly 9 is of a pipe clamp type structure and is composed of an upper joint 12 and a lower joint 13 which are connected in a screwed mode, wherein the lower joint 13 is riveted with the rear section feeler lever 3, the cantilever feeler lever is convenient to mount and dismount, a gap is reserved on the upper joint 12, a rubber pad is bonded on the gap, the cantilever feeler lever can be effectively clamped, and vibration is buffered.

The front section probe rod 1, the middle section probe rod 2, the rear section probe rod 3 and the connecting piece 4 are all structural forms of composite material laminated plates, but different composite materials and theoretical thicknesses are adopted, so that the front part of the overall structure is thinner, and the rear part of the overall structure is thicker, and the overall rigidity of the magnetic probe rod is improved.

Specifically, the front section probe rod 1 is made of a medium-temperature cured epoxy glass cloth prepreg which has no influence on electromagnetic detection and has a thickness of 1.2-1.8 mm; the middle section probe rod 2 is made of medium-temperature cured epoxy carbon fiber unidirectional prepreg with a large modulus and is 2.0-2.5 mm thick; the rear section probe rod 3 is made of medium-temperature cured epoxy carbon fiber unidirectional prepreg with a large modulus and is 3.0-3.5 mm thick; the material of the connecting piece 4 is a medium-temperature cured epoxy carbon fiber unidirectional prepreg with a large modulus, the thickness is 4.0-4.5 mm, and through the comprehensive design of the different composite materials and the thickness, the requirements of the overall strength and the rigidity that the magnetic probe rod with a large length-diameter ratio can bear the influence of air flow and cannot be damaged in the flying process of a helicopter can be effectively met, and meanwhile, the actual detection precision requirement can be met for the electromagnetic influence.

The paving layers of the front section probe rod 1, the middle section probe rod 2, the rear section probe rod 3 and the connecting piece 4 are designed to be 0-degree paving layers accounting for two thirds of the total paving layers, 45-degree paving layers accounting for one third of the total paving layers so as to bear bending moment brought by pneumatic load, wherein the 0-degree direction is consistent with the course of the helicopter.

And the copper strips are paved in the 0-degree paving layers of the front section probe rod 1, the middle section probe rod 2, the rear section probe rod 3 and the connecting piece 4 so as to meet the requirement of lightning protection.

The mouth cover 5, the front cover 6 and the rear cover 7 are all made of composite materials, wherein the front cover 6 is made of materials consistent with the front section probe rod 1, and the mouth cover 5 and the rear cover 7 are made of materials consistent with the middle section probe rod 2. Required bolt, nut, rivet and packing ring material of spiro union are no magnetism metal material between anterior segment probe rod 1, middle section probe rod 2, back end probe rod 3, front shroud 6, back shroud 7 and the flap 5 to improve the whole no magnetism effect of magnetism probe rod, increase detection accuracy.

The cantilever magnetic probe rod is a cylinder, the length of the cantilever is not less than 6 meters, but the diameter of the cantilever is not more than 0.3 meter, and the main structure of the pull rod assembly 8 arranged between the middle rear part of the cantilever and the machine body structure is formed by riveting a steel pipe and a double-fork lug joint and then screwing the steel pipe and the double-fork lug joint with a single-fork lug joint, so that the stability of the large-size magnetic probe rod in the flying process can be effectively ensured, and the detection precision is improved.

The invention has the beneficial effects that: the cantilever magnetic probe rod solves the design difficulty of a cantilever structural member with a large length-diameter ratio, ensures the structural design requirements of smaller amplitude, no magnetic treatment and lightning protection, improves the detection efficiency of aeromagnetic detection equipment, meets the aeromagnetic measurement requirement of a helicopter in a certain flight height, simultaneously reduces the structural weight, improves the assembly manufacturability, shortens the processing period, reduces the cost, adopts a bolt connection form when being connected with a machine body, can realize the quick installation, maintenance and disassembly of the probe rod, is applied to an ACxx type machine at present, and has larger practical application value.

Drawings

FIG. 1 is a schematic diagram of the position of a cantilever magnetic probe.

Fig. 2 is a schematic structural view of a cantilever magnetic probe.

Fig. 3 is a schematic view of a front cover bracket.

Fig. 4 is a schematic view of a flap bracket.

FIG. 5 is a schematic view of a connector sub assembly.

FIG. 6 is a schematic view of a tie rod assembly.

The device comprises a front section probe rod 1, a middle section probe rod 2, a rear section probe rod 3, a connecting piece 4, a cover cap 5, a front cover 6, a rear cover 7, a pull rod assembly 8, a connecting joint assembly 9, a support 10, a support 11, an upper joint 12 and a lower joint 13.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be described in further detail with reference to the accompanying drawings and specific embodiments.

Example (b):

two kinds of aeromagnetic detection equipment need to be installed on a certain helicopter, wherein the combined length of one kind of aeromagnetic detection equipment is about 3 meters, and the combined length of the other kind of aeromagnetic detection equipment is about 1.2 meters. In order to ensure the measurement precision of aeromagnetic measurement task equipment, the following strict installation and use requirements are provided for a magnetic probe for installing the aeromagnetic measurement equipment:

1. the aeromagnetic measurement task equipment arranged at the forefront end needs to be more than 6 meters away from the forefront end of the machine head.

2. The strength and rigidity characteristics of the helicopter are required to be maintained in the normal flight process of the helicopter, resonance is avoided, and vibration is reduced as much as possible.

3. Non-magnetic treatment is needed, and the requirement of lightning protection is considered.

4. Convenient to be disassembled, assembled and stored.

Therefore, in practical implementation, the design and manufacturing difficulty is high, and the risk is high.

The helicopter is a front three-point retractable landing gear and is limited by surrounding installation space, and the magnetic probe rod can only be a cylindrical cantilever structure with a large length-diameter ratio.

For this purpose, in the embodiment, referring to fig. 1-6, the cantilever magnetic probe is composed of a front section probe 1, a middle section probe 2, a rear section probe 3, a connecting member 4, a cover 5, a front cover 6, a rear cover 7, a pull rod assembly 8, a connecting joint assembly 9, a bracket 10 and a bracket 11.

The cantilever magnetic probe rod is divided into a front section probe rod 1, a middle section probe rod 2 and a rear section probe rod 3 which jointly form a main body structure of the cantilever magnetic probe rod and are connected together through a connecting piece 4 in a screwed mode, the total length is 8.8 meters, the length of a cantilever is not less than 6 meters, the diameter of the cantilever is not more than 0.3 meter, and the requirements of light weight and 4 points are met. In order to improve the overall rigidity of the cantilever magnetic probe rod, the front section probe rod 1, the middle section probe rod 2, the rear section probe rod 3 and the connecting piece 4 are all structural forms of composite laminated plates, but different composite materials and theoretical thicknesses are adopted, so that the front part of the overall structure is thinner, the rear part of the overall structure is thicker, and the overall structure is gradually increased. The front-section probe rod 1 is made of a medium-temperature cured epoxy glass cloth prepreg, does not influence electromagnetic detection, and has a thickness of 1.2-1.8 mm; the middle section probe rod 2 is made of medium-temperature cured epoxy carbon fiber unidirectional prepreg with a large modulus and is 2.0-2.5 mm thick; the rear section probe rod 3 is made of medium-temperature cured epoxy carbon fiber unidirectional prepreg with a large modulus and is 3.0-3.5 mm thick; the connecting piece 4 is made of medium-temperature cured epoxy carbon fiber unidirectional prepreg with a large modulus and is 4.0-4.5 mm thick. And according to the overall stress condition of the cantilever probe rod, the layers of the front section probe rod 1, the middle section probe rod 2, the rear section probe rod 3 and the connecting piece 4 are designed to be 0-degree layers accounting for two thirds of the total number of the layers, and 45-degree layers accounting for one third of the total number of the layers, wherein the 0-degree direction is consistent with the course of the helicopter. The laying layers of the front section probe rod 1, the middle section probe rod 2, the rear section probe rod 3 and the connecting piece 4 are additionally provided with copper strips for laying so as to meet the requirement of lightning protection.

The appearance that sets up the magnetism probe rod is the cylinder, and the diameter is not more than 0.2 meter to set up the installation appearance at magnetism probe rod front and back end and be spherical front shroud 6, both can satisfy the minimum installation requirement of the inside electromagnetic detection equipment of magnetism probe rod, can influence the aerodynamic performance after the helicopter installs the magnetism probe rod additional as far as possible again.

The front section probe rod 1, the middle section probe rod 2, the rear section probe rod 3 and the connecting piece 4 jointly form a main body structure of the magnetic probe rod, and compared with a metal material, the magnetic probe rod has the advantages of high specific strength and specific rigidity, good stability, designability of mechanical properties and the like due to the structural form of a composite laminated board used as a part. The paving layer is designed to be 0-degree paving layer accounting for two thirds of the total paving layer number, and 45-degree paving layer accounting for one third of the total paving layer number, wherein the 0-degree direction is consistent with the course of the helicopter, so that the paving layer can bear bending moment brought by the concentrated load of the pneumatic load and the electromagnetic detection equipment with the maximum efficiency; and a copper strip is laid in the 0-degree paving layer and is in lap joint conduction with the machine body through a connecting joint component 9 so as to realize the lightning protection effect. Through setting up gradually increasing progressively, being cascaded change's thickness by preceding to the back to anterior segment probe rod 1, middle section probe rod 2, back end probe rod 3, can avoid the stress sudden change, alleviate the weight of magnetism probe rod effectively, make it have good weight efficiency, and make its focus more close the back and close organism, influence the flight performance of helicopter as far as possible little. The magnetic probe in the electromagnetic detection equipment is the equipment with the highest precision and is arranged on a support 10 in the front cover 6, the epoxy glass cloth prepreg is cured in the material of the front cover 6 at the medium temperature, and the nylon material of the support 10 has no influence on the electromagnetic detection, so that the environment of weak magnetism or even no magnetism can be realized.

The support 10 and the support 11 that bonding material is nylon on anterior segment probe rod 1, middle section probe rod 2 and the front shroud 6 respectively, two kinds of aeromagnetic detection equipment pass through the silk ribbon to be fixed on the inside support 10 and the support 11 of magnetoprobe rod to avoid influencing the electromagnetic detection precision. The front cover 6 is in threaded connection with the end part of the front probe rod 1, and installation requirements of 180-degree rotation of equipment can be met by reasonably arranging threaded connection positions. A cover cap 5 is arranged at the position of an opening of the bracket 11 of the front section probe rod 1 and the middle section probe rod 2, and the cover cap 5 is in threaded connection with the front section probe rod 1 and the middle section probe rod 2 so as to facilitate the routine maintenance of the aeromagnetic detection equipment. The front section probe rod 1, the middle section probe rod 2 and the front cover 6 are in a structural form of a composite material laminated board, wherein the front cover 6 is made of the same material as the front section probe rod 1, and the opening cover 5 and the rear cover 7 are made of the same material as the middle section probe rod 2.

The cantilever magnetic probe rod is in screwed connection with the machine body structure through a connecting joint component 9, the connecting joint component 9 is in a pipe clamp type structure and is composed of an upper joint 12 and a lower joint 13 which are in screwed connection. In order to facilitate the installation and the disassembly of the cantilever magnetic probe rod, the lower joint 13 is riveted with the rear section probe rod 3. The upper joint 12 is provided with a gap and is bonded with a rubber pad, so that the cantilever magnetic probe rod can be effectively clamped and vibration can be buffered.

The cantilever length of the cantilever magnetic probe rod is longer, so that two groups of pull rod assemblies 8 are screwed between the position 5.5 meters away from the end part of the cantilever magnetic probe rod and the machine body structure. The main structure of the pull rod assembly 8 is formed by riveting a steel pipe and a double-fork lug joint and then connecting the steel pipe with a single-fork lug joint in a threaded manner, so that the stability and the overall rigidity of the cantilever magnetic probe rod can be effectively improved, the vibration is controlled, and the precision is ensured.

According to the requirement of aeromagnetic detection equipment on a non-magnetic environment, the materials of bolts, nuts, rivets and washers required by the screw connection among the front section probe rod 1, the middle section probe rod 2, the rear section probe rod 3, the front cover 6, the rear cover 7 and the opening cover 5 need to be non-magnetic materials with certain structural strength, brass is selected in the embodiment, and other non-magnetic materials meeting the requirement can be adopted according to actual needs.

The cantilever magnetic feeler lever of the invention functionally realizes the alternate installation of two sets of aeromagnetic detection equipment on the body structure, ensures the structural design requirements of smaller amplitude, no magnetic treatment and lightning protection, improves the detection efficiency of the aeromagnetic detection equipment, and meets the aeromagnetic measurement requirement of a helicopter in a certain flight height. The cantilever structure solves the design difficulty of a cantilever structure with a large length-diameter ratio, reduces the structural weight, improves the assembly manufacturability, shortens the processing period, reduces the cost, adopts a bolt connection form when being connected with a machine body, and can realize the quick installation, maintenance and disassembly of the probe rod.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present invention shall be included in the protection scope of the present invention, and the present invention shall not be detailed in the conventional art.