RU207633U1 - Platform turning device for a helicopter crash-resistant fuel system test rig - Google Patents

Abstract

The utility model relates to the field of helicopter engineering, namely to test facilities for testing the accident-resistant fuel system of a helicopter for compliance with the airworthiness standards of rotary-wing vehicles of the transport category. The device for turning the platform 1, used for testing the helicopter fuel system, is intended for a platform formed by rotary rectangular frames located one into the other, external 3 and internal 4, installed with the possibility of rotation around two mutually perpendicular axes. The device contains two pairs of hydraulic drives 12, one of which pivotally connects the opposite long sides of the outer frame - beams 6 with the base 1 and is designed to rotate the outer frame 3, and another pair of hydraulic drives 15 pivotally connects the inner frame 4 to the outer 3 and is designed to rotate the inner frame 4 relative to the outer frame 3. The housing 16 of each hydraulic drive 15 of the inner frame 4 is pivotally connected to the corresponding beam 11 of the short side of the outer frame 3, and the rod 17 of this hydraulic drive 15 is pivotally connected to the corresponding lower beam 18 of the inner frame by means of the bracket 20 and the pin 21 frame 4 in the area of the power rack 8, connecting the upper 10 and lower 18 beams of the inner frame 4, and the said bracket 20 is U-shaped, located with the open side up and rigidly fastened by a threaded connection to the inner frame 4 with the enclosure of its lower beam 18 by the walls U-shaped bracket. In addition, a pin 21 is installed in the holes of the walls of the U-shaped bracket, which is intended for the articulated connection of the rod 17 of the hydraulic drive 15 of the inner frame with the U-shaped bracket 20. 5 C.p. f-ly, 16 ill.

Description

The utility model relates to the field of helicopter engineering, namely to test facilities for testing the fuel system of a helicopter for compliance with the airworthiness standards of rotary-wing vehicles of the transport category.

A device for rotating an object in two planes is known from the prior art (SU 1010642, 04/07/1983), which contains a base with an electric motor and two rectangular frames mounted on the base with the help of supports and axes of rotation, interconnected by additional axes of rotation. Rectangular frames are strictly centered with respect to the common center of gravity and axes of rotation of each of the frames. The electric motors are driven into rotation of the frame, and one frame rotates in the horizontal plane in the holes of the supports on the first pair of axles, and the other frame rotates perpendicular to the first frame inside it in the holes on its (second) pair of axes.

There is also known a stand for testing fuel and oil units of aircraft (SU 1360363, 2006), containing a bed with a platform rotatable relative to the vertical axis to accommodate the tested unit, an electromechanical drive of the platform and a hydraulic circuit connected to the inlet and outlet fittings of the tested unit, including a pump, a tank , heat exchanger, filter, limit pressure sensor, flow meter. The turntable is U-shaped and installed in the bearings of the bed with the ability to rotate around the horizontal axis, in addition, a pallet is installed under the turntable, connected by a pipeline through an additional filter to the tank, between the pipeline connecting the pallet to the tank and the pressure line of the hydraulic circuit is switched on a pipeline with a solenoid valve electrically connected to the limit pressure sensor, while the air separator drive is electrically connected to the pump motor, and its air outlet is connected to the pipeline connecting the sump to the tank.

The closest analogue of the claimed utility model is a stand for full-scale tests of an aircraft (RU 2158908, 11/10/2000), containing a base and a device for hanging the tested aircraft over the base. The device for hanging the tested aircraft over the base is made in the form of a support, one end attached to the base, and the other end by means of a two-degree hinge, connected to the middle part of the lever. The aircraft is installed in a frame enclosing it along the perimeter in a horizontal plane, on the first pair of trunnions with the ability to swing in a vertical plane around a horizontal axis perpendicular to the plane of symmetry of the aircraft, while the frame is fixed with a second pair of trunnions at the ends of the bracket with the ability to swing around the longitudinal axis of the aircraft. The said bracket is fixed at one end of the said lever by means of a flexible connection located on the vertical axis of the aircraft passing through its center of gravity, and at the other end of this lever a load is fixed, made to balance the lever with the above-mentioned bracket and frame fixed to it.

The above analogs, including the closest analogue, are complex in design, have large dimensions and are not intended for testing the helicopter fuel system for swinging, in addition, the analogs do not solve the problem of increasing the strength and resistance of the structure to deformation.

The technical problem solved by the utility model is to simplify the design of the device, reduce the dimensions and increase the reliability of its operation when testing the fuel system of the helicopter in accordance with the Aviation Regulations, Part 29, "Standards of airworthiness of rotary-wing vehicles of the transport category" (approved by the Resolution of the 22nd session Council for Aviation and the Use of Airspace dated 31.10.2002).

The technical result from the use of the utility model is to increase the reliability of the device for turning the platform frames while simplifying its design and reducing its dimensions.

The claimed utility model relates to a platform rotation device consisting of an external and an internal frame and is used to check the performance of an accident-resistant fuel system in the process of changes in the spatial position of its components in roll and pitch within ± 15 ° relative to the horizontal plane and to determine non-draining and non-drained volumes of fuel at various spatial positions of its components within the above limits. The platform is a combination of two rotary rectangular frames located one inside the other, external and internal, with the ability to rotate separately or simultaneously around two mutually perpendicular axes. The inner frame along the inner part of its perimeter is equipped with fastening elements for installing tested components of an accident-resistant fuel system on it.

The turning device, like the closest analogue, contains means that make it possible to rotate the test object in mutually perpendicular directions relative to its longitudinal and transverse axes.

The technical result indicated for the utility model is achieved due to the combination of the following essential features.

The device for rotating the platform, installed on the base and formed by rotary rectangular frames located one in the other, external and internal, installed with the possibility of rotation around two mutually perpendicular axes, contains two pairs of hydraulic drives, and the longitudinal axes of each pair of drives are located in the same plane, while one pair of drives is designed to rotate the inner frame (hereinafter referred to as hydraulic drives of the inner frame), and the other pair is designed to rotate the outer frame (hereinafter referred to as hydraulic drives of the outer frame), while the housings of each hydraulic drive of the inner frame are connected to one of the structural elements of the outer frame, in particular, the housing of each hydraulic drive of the inner frame is connected to the beam of the short side of the outer frame to rotate the inner frame relative to the outer one. The housings of the hydraulic drives of the outer frame are hinged to the opposite edges of the base frame. The housings of the hydraulic drive of the inner frame are hinged to the opposite transverse (short) beams of the outer frame. This mounting scheme for the inner frame drive "outer frame beam - drive - inner frame beam" allows to simplify the power chain as much as possible and isolate the inner frame from other components of the turntable of the test rig. In addition, the inner frame along the inner part of its perimeter is equipped with fastening elements for installing components of an accident-resistant fuel system on it, and a stand connecting the upper and lower beams of the short side of the inner frame is used as a lever for turning the inner frame relative to the outer frame. This solution allows the use of existing structural elements, forcing them to perform their additional functions, without introducing additional elements into the inner frame, in this case a special pivoting arm, which simplifies the design of the device, ensures the reliability of the device without increasing its dimensions. The bracket for fastening the rod of each hydraulic drive of the inner frame to the inner frame is made U-shaped (in the form of a "trough") and is attached to the inner frame, covering its lower beam. This design allows for a more even distribution of the forces acting from the hydraulic actuator rod in the area of connection of the lower beam of the short side of the inner frame and the rack, which acts as a lever for turning the inner frame relative to the outer one, which increases the reliability of the device and simplifies fastening of the rod to the lower beam. In the holes of the U-shaped bracket for fastening the rod of each hydraulic drive of the inner frame to the inner frame, a finger is installed along a sliding fit, intended for connecting the rod of the inner frame drive with the said U-shaped bracket.

To strengthen the lower beam of the short side of the inner frame, bushings are welded into it, inside of which are the bolts for fastening the U-shaped bracket, which makes it possible to avoid deformation of the elements of the described connection by creating an imitation of a one-piece package pulled together by a bolted connection. In addition, a more even distribution of the load is additionally ensured by the fact that the bolts for fastening the bracket to the beam are arranged in two rows in a staggered manner along the entire length of the “trough” of the bracket.

The hydraulic drives of each pair are arranged in such a way that when a pair of hydraulic drives is in the middle position during operation, the angle between the plane in which the longitudinal axes of each pair of drives are located and the plane passing through the axes of the hinges of the drive rods and the axis of rotation of the corresponding frame is 90 °.

For reliable fastening of the finger in the bracket and its fixation from possible rotation along its axis, the finger is equipped with an annular stop shoulder and two legs. To prevent the pin from falling out of the trough during transportation, a hole is made in one of the legs for a locking bolt.

The utility model is illustrated by drawings.

FIG. 1 shows a general view of the platform installed on the base.

FIG. 2 depicts the outer frame of a platform with hydraulic drives of the outer frame (base not shown).

FIG. 3 shows the inner frame of the platform.

FIG. 4 shows a general view of the platform (the base is not shown).

FIG. 5 shows the installation area of one of the hydraulic drives of the inner frame.

FIG. 6 shows the same as in FIG. 5, but with the elements of the outer frame removed.

FIG. 7 shows location A in FIG. 6.

FIG. 8 shows a U-shaped bracket (in the form of a "trough") with a finger installed in it.

FIG. 9 shows the same as in FIG. 8, the finger is removed.

FIG. 10 shows a finger.

FIG. 11 shows the attachment of the housing (cylinder) of the hydraulic drive of the inner frame to the beam of the outer frame (to the short side of the outer frame).

FIG. 12 shows a fragment of the inner frame of the platform with a hinge unit for turning the inner frame (the outer frame is not shown), a stand connecting the upper and lower beams of the inner frame, and a U-shaped bracket covering the lower beam of the inner frame, with a hydraulic drive rod of the inner frame fixed to it ...

FIG. 13 shows a fragment of the outer frame of the platform with a pivot assembly for turning the outer frame, a pivot assembly for attaching the hydraulic drive rod of the outer frame to the outer frame beam and a pivot assembly for attaching the body (cylinder) of the hydraulic drive of the outer frame to the base (the base is not shown).

FIG. 14 and 15 show, respectively, fragments of the hydraulic drive at the locations of the hinged assemblies for attaching the hydraulic drive rod of the outer frame to the beam of the outer frame and attaching the body (cylinder) of the hydraulic drive of the outer frame to the base.

FIG. 16 shows the hinged assembly for attaching the housing (cylinder) of the hydraulic drive of the outer frame to the base.

In the drawings, the numbers indicate:

1 - base;

2 - turntable;

3 - outer frame of the turntable;

4 - inner frame of the turntable;

5 — outer frame pivot points located on opposite long sides of the outer frame;

6 - beams of the long side of the outer frame;

7 - racks connecting the hinged nodes of the outer frame rotation with the base;

8 - power struts of the inner frame;

9 - pivot points for turning the inner frame relative to the outer frame, located on opposite short sides of the outer and inner frames;

10 — upper beams of opposite short sides of the inner frame;

11 - beams of opposite short sides of the outer frame;

12 - hydraulic drives of the outer frame;

13 - housing of the hydraulic drive of the outer frame;

14 - rod of the hydraulic drive of the outer frame;

15 - hydraulic drives of the inner frame;

16 - housing of the hydraulic drive of the inner frame;

17 - rod of the hydraulic drive of the inner frame;

18 — lower beams of opposite short sides of the inner frame;

19 - beam plate of the short side of the outer frame;

20 - bracket for hinged fastening of the hydraulic drive rod of the inner frame on the lower beam of the short side of the inner frame;

21 - finger;

22 - annular thrust collar of the pin;

23 - paws of the annular stop shoulder of the finger;

24 - hole for the stop bolt in the foot of the annular stop shoulder of the finger.

The platform turning device is a part of the test facility for the components of an accident-resistant fuel system, which is a base 1 with a rotary platform 2 located on it, consisting of two rotary rectangular frames located one in the other, external 3 and internal 4, which have the ability to rotate separately or simultaneously around two mutually perpendicular axes.

Two hinged assemblies 5 for turning the outer frame 3, connecting the beams 6 of the opposite long sides of the outer frame 3 and the post 7 of the outer frame, attached to the base 1, ensure the rotation of the outer frame when testing the operability of the components of an accident-resistant fuel system during changes in the spatial position of the fuel system in pitch within ± 15 ° from the horizontal plane.

The inner frame 4 consists of upper beams connected by power struts 8 of the inner frame with the lower beams. Two hinged assemblies 9 for turning the inner frame 4 relative to the outer frame 3, connecting the upper beams 10 of the opposite short sides of the inner frame 4 with the beams 11 of the short sides of the outer frame 3, ensure the rotation of the inner frame 4 when testing the performance of the components of an accident-resistant fuel system during changes in spatial position fuel system roll within ± 15 ° relative to the outer frame. The inner frame 4 along the inner part of its perimeter is equipped with fastening elements for installing tested components of an accident-resistant fuel system on it.

The rotation of the outer frame relative to the horizontal plane is carried out by means of two hydraulic drives 12 of the outer frame, the body (cylinder) 13 of each of which is pivotally fixed on the base 1, and the rods 14 are pivotally connected to the opposite beams 6 of the long sides of the outer frame 3.

The rotation of the inner frame 4 is performed relative to the outer frame 3 and is carried out by means of two hydraulic drives 15 of the inner frame, the body (cylinder) 16 of each of which is hinged to the corresponding beam 11 of the short side of the outer frame 3, and the rods 17 are hingedly connected to the corresponding lower beams 18 the short side of the inner frame 4 in the area of the location of the power rack 8, connecting the lower 18 and upper 10 beams of the short sides of the inner frame 4.

The hydraulic drives 12 of the outer frame 3 are arranged in such a way that their longitudinal axes are in the same plane, and when the said drives 12 are in the middle position, the angle between this plane and the plane passing through the axes of the hinges of the rods and the axis of rotation of the outer frame is ninety degrees, while the drives 12 operate synchronously. The hydraulic drives 15 of the inner frame 4 are located similarly - their longitudinal axes are also in the same plane, and when the drives 15 are in the middle position, the angle between this plane and the plane passing through the axes of the hinges of the rods and the axis of rotation of the inner frame is ninety degrees, while the drives 15 operate synchronously.

In more detail, the means for pivoting the inner platform frame 4 are shown in FIG. 5, 6 and 11.

FIG. 5 shows the installation area of one of the hydraulic drives 15 of the inner frame 4. Since the rotation of the inner frame 4 is performed relative to the outer frame 3, the housing 16 (cylinder) of the hydraulic drive 15 of the inner frame is mechanically connected to one of the structural elements of the outer frame, namely, to the beam 11 the short side of the outer frame.

The housing 16 of the hydraulic drive 15 of the inner frame is mounted by its hinge assembly to a special bracket fixed to the plate 19 of the transverse beam of the outer frame (see Fig. 11). The rod 17 of the hydraulic actuator 15 of the inner frame 4 is pivotally connected to the lower beam 18 of the short side of the inner frame 4. In FIG. 6 shows the location area of the hydraulic drive 15 of the inner frame (for ease of perception, the structural elements of the outer frame are not shown).

The hinge fastening of the rod 17 of the hydraulic actuator 15 of the inner frame 4 on the lower beam 18 of the short side of the inner frame 4 is made by means of the bracket 20. The bracket 20 is made in a U-shape (in the form of a "trough"), with the open side facing up. As shown in FIG. 6-9, the bracket 20 encloses with its vertical walls the lower beam 18 and is fixed to it with bolts passing through the walls of the U-shaped bracket 20 ("trough") and the lower beam. To strengthen this zone of the beam, bushings (not shown in the drawings) are welded into it, inside which there are bolts. For a more even distribution of the load, the mounting bolts of the bracket 20 on the beam 18 are arranged in two rows in a staggered manner along the entire length of the walls of the bracket 20.

The hinge fastening of the rod 17 of the hydraulic actuator 15 of the inner frame 4 on the bracket 20 connected to the lower beam 18 of the short side of the inner frame 4 is made by means of the pin 21 installed in the bracket 20 and connected to the free end of the rod 17 of the actuator 15. Due to the fact that the pin 21 perceives the entire load transmitted by the rod 17 of the actuator 15 with the bracket 21, it must be made of a material of increased strength, while the bracket 21 itself, due to its "smearing" along the lower beam 18 (extended contact area), can be made of steel of lesser strength. Thus, the hinge fastening of the rod 17 of the hydraulic drive 15 of the inner frame 4 on the lower beam 18 of the short side of the inner frame 4 is made of two components: a U-shaped bracket 20 made of structural steel and a hardened pin 21 installed in the bracket 20 along a sliding fit. To securely fasten the finger in the bracket 20 and fix it from possible rotation along its axis, the finger 21 is equipped with an annular stop shoulder 22 and two lugs 23. To prevent the finger 21 from falling out of the bracket 20 during transportation, a hole 24 is made in one of the legs 23 for locking bolt.

As a lever that ensures the rotation of the inner frame 4 relative to the hinge unit for turning the inner frame 4, a power post 8 is used, connecting the upper 10 and lower 18 beams of the short side of the inner frame 4. This scheme excludes the introduction of a special pivoting lever into the kinematic diagram of the structure, which simplifies the design device and at the same time increases its reliability.

The above-described scheme of fastening the hydraulic drive 15 of the inner frame 4 "beam 11 of the outer frame 3 - hydraulic drive 15 - lower beam 18 of the inner frame 4" allows to simplify the power chain as much as possible and from the "power point of view" isolate the inner frame from the influence of other components of the turntable of the test installation, which will ensure reliable operation and the required test conditions for the accident-resistant fuel system of the helicopter.

The design of the turntable with the declared turning device allows you to change the spatial position of the components of the accident-resistant fuel system of the helicopter both in pitch by turning the outer frame 3, and along the roll by turning the inner turntable 4. Changing the position of the components of the accident-resistant fuel system in pitch or roll can be performed separately for each direction or jointly for both directions, both discretely and in continuous mode.

Claims (6)

1. A device for rotating a platform formed by rotating rectangular frames located one inside the other, external and internal, mounted with the possibility of rotation around two mutually perpendicular axes, containing two pairs of hydraulic actuators, one of which, pivotally connecting the opposite long sides of the external frame with the base, is intended to rotate the outer frame, and the other, pivotally connecting the inner frame to the outer, to rotate the inner frame relative to the outer frame, and the longitudinal axes of each pair of hydraulic drives are located in the same plane, while the body of each hydraulic drive of the inner frame is pivotally connected to the corresponding beam of the short side the outer frame, and the rod of this hydraulic drive by means of a bracket and a pin is pivotally connected to the corresponding lower beam of the inner frame in the area of the location of the power rack connecting the upper and lower beams of the inner frame, and the said bracket is made P -shaped, located with the open side up and rigidly fastened by a threaded connection to the inner frame with the coverage of its lower beam by the walls of the U-shaped bracket, in addition, a pin is installed in the holes of the walls of the U-shaped bracket, intended for the hinge connection of the drive rod of the inner frame with the P -shaped bracket. 2. The device according to claim 1, characterized in that the inner frame along the inner part of its perimeter is equipped with fastening elements for installing on it the components of the helicopter fuel system under test. 3. The device according to claim 1, characterized in that bushings are welded into the holes of the lower beam of the short side of the inner frame, intended for the bolts connecting the bracket to the lower beam of the short side of the inner frame, in which fasteners are located - bolts passing through the walls of the P- shaped bracket and the lower beam of the short side of the inner frame. 4. The device according to claim 1 or 3, characterized in that the bolts for fastening the bracket to the beam are arranged in two rows staggered along the entire length of the U-shaped bracket. 5. The device according to claim 1, characterized in that the hydraulic drives of each pair are arranged in such a way that when the pair of hydraulic drives is in the middle position during operation, the angle between the plane in which the longitudinal axes of each pair of drives are located and the plane passing through the axis of the joints of the drive rods and the axis of rotation of the corresponding frame, is 90 °. 6. The device according to claim. 1, characterized in that the pin for pivoting the drive rod of the inner frame with the U-shaped bracket is equipped with an annular stop shoulder and two legs, and one of the legs has a hole for the stop bolt.

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