CN104280241A - Helicopter rotor system elastic bearing load measuring device - Google Patents

Abstract

The invention relates to a load measuring device for an elastic bearing of a helicopter rotor system, comprising a measuring base, an X-axis testing mechanism, a Y-axis and a Z-axis bending testing mechanism, a locking mechanism, and a twisting testing mechanism around the X-axis. The measurement base is composed of a detection table base, a rotating shaft, and a large end fixture of the bearing. It is set at the bottom of the equipment, and the X-axis testing mechanism is set on the top of the equipment. Axial and Z-axial bending test mechanisms are respectively arranged in the lower, middle and upper layers of the equipment in sequence from bottom to top along the X-axis axis. The invention realizes the detection of the rigidity characteristics of the elastic bearings of the rotor systems of different types of helicopters on one detection platform, and the utility model is good. The detection efficiency and the safety of personnel in the detection process are improved, the detection intensity is reduced, and the elastic bearing can be clamped on one detection platform at one time, and the multi-dimensional direction force (moment) can be loaded and measured at the same time.

Description

A Helicopter Rotor System Elastic Bearing Load Measuring Equipment

technical field

The invention relates to a load measurement and analysis device, in particular to a load measurement device for an elastic bearing of a helicopter rotor system.

Background technique

Elastic bearing is one of the three major technologies of the third-generation rotor system and an important component of the rotor system. Its stiffness characteristics and quality are crucial to the safety of the helicopter and directly affect the quality of the helicopter. The stiffness characteristic of elastic bearing is one of the most important characteristics to measure elastic bearing, so it is necessary to carry out accurate detection. However, the loading method of the elastic bearing for load measurement should be a multi-dimensional force and moment comprehensive force application system, which makes the design technology of the load measurement equipment particularly complicated. At present, there is no equipment in China that can simultaneously load and measure the multi-dimensional force and moment of the helicopter elastic bearing at one time. The loading measurement elastic bearing method in the prior art is to carry out a single item of loading measurement on different loading equipment, which leads to low detection efficiency, high work intensity of the detection personnel, poor detection process safety, and low detection result accuracy.

Contents of the invention

Aiming at the deficiencies in the above existing conditions, the present invention provides a load measuring device for the elastic bearing of the helicopter rotor system.

A load measuring device for an elastic bearing of a helicopter rotor system comprises a measuring base, an X-axis testing mechanism, a Y-axis and a Z-axis bending testing mechanism, a locking mechanism for locking, and a torsion testing mechanism around the X-axis.

The measurement base is composed of a detection table base 1, a rotating shaft 2, and a bearing big end fixture 3, and is set at the bottom of the device.

A bearing seat is provided on the upper end surface of the base 1 of the testing platform. The core of the shaft body of the rotating shaft 2 is provided with a spline hole, and the waist of the shaft body of the rotating shaft 2 is provided with a turntable, and a pair of hinge holes are symmetrically arranged on the turntable. Its afterbody of bearing big end clamp 3 is a spline shaft, and its head is provided with U-shaped jaws, and the outer sides of jaws are provided with mounting holes.

The lower part of the shaft body of the rotating shaft 2 is sleeved in the bearing seat hole of the test bench base 1 through a thrust bearing. The axle body spline of rotating shaft 2 is connected with the afterbody of bearing big end clamp 3. The U-shaped jaws of the bearing big end fixture 3 face upward.

The X-axis testing mechanism is set on the top of the equipment. The installation center of the X-axis test mechanism is coaxial with the center of the bearing seat hole of the test bench base 1, and the two form the X-axis axis of the loading measurement system.

The twisting test mechanism around the X-axis, the locking mechanism for locking, the bending test mechanism for the Y-axis and the Z-axis are respectively arranged in the lower, middle and upper layers of the equipment in sequence from bottom to top along the X-axis axis.

The torsion test mechanism around the X axis includes the torsion test hydraulic cylinder A24 and the torsion test hydraulic cylinder B18 as the power source, and the connecting rod D26, the force sensor C25, the connecting rod E28, and the force sensor D 27 form a force couple that is horizontal and coplanar. system, and are connected together by the rotating shaft 2 and arranged on the lower floor of the equipment.

The piston flange end of the torsion test hydraulic cylinder A24 faces right and is arranged at the left rear of the rotating shaft 2, and is sequentially connected to the flange plate and the flange end of the connecting rod D26 by bolts. The force sensor C25 is jacketed between the cores of the two connection flanges. The connecting rod end of the connecting rod D26 is hinged on one end hinge hole of the rotating shaft 2 rotating disks.

The piston flange end of the torsion test hydraulic cylinder B18 faces left and is arranged on the right front of the rotating shaft 2, and is connected to the flange plate and the flange end of the connecting rod E28 in turn by bolts. The force sensor D 27 is jacketed between the cores of the two connecting flanges. Connecting rod E28 connecting rod end is hinged on the other end hinge hole of rotating shaft 2 rotating disks.

The X-axis test mechanism installed on the top of the equipment includes a compression test hydraulic cylinder 10 as a power source, and a vertical downward force application system composed of a connecting rod A9 and a force sensor A21.

Its upper end of connecting rod A9 is a ball end, and its lower end is a flange.

The compression test hydraulic cylinder 10 is fixedly connected on the support of the device by bolts, and the piston head of the compression test hydraulic cylinder 10 is vertically downward, and is connected with the ball end of the connecting rod A9 through the ball joint A11. The flange end of the connecting rod A9 is sequentially connected to the flange and the flange end of the connecting rod A9 through bolts, and the force sensor A21 is jacketed between the cores of the two connecting flanges.

The Y-axis and Z-axis bending test mechanisms include the bending test hydraulic cylinder B14 and the bending test hydraulic cylinder A6 as the power source, and the connecting shaft 8, the connecting rod C22, the force sensor B23, the connecting rod B12 and the connecting rod F30, and the force sensor E32 and connecting rod G31 constitute a force application system in which two directions perpendicular to each other act on the same point in the horizontal coplanar plane.

The square body of connecting shaft 8 is provided with a flange on its top, and the circular boss core of its bottom is provided with a spline hole, and the front side and right side of connecting shaft 8 square body are respectively provided with a vertical chute.

The connecting rod F30 has the same shape and structure as the connecting rod B12, with a flange at one end and a ball end at the other end.

The connecting rod G31 has the same shape and structure as the connecting rod C22, with a round pin head at one end and a flange at the other end.

The flange end of the connecting shaft 8 is connected with the flange end of the connecting rod A9 of the X axial testing mechanism through a flange.

The Y-axis and Z-axis bending test mechanisms are arranged on the upper layer of the equipment by connecting with the connecting shaft 8 .

The piston shaft bowl of the bending test hydraulic cylinder A6 corresponds to the front face of the connecting shaft 8 squares. The piston shaft bowl of the bending test hydraulic cylinder A6 is hinged together with the ball end of the connecting rod G30 through the ball joint C29, the flange end of the connecting rod G30 is connected to the flange plate and the flange end of the connecting rod G31 in sequence through bolts, and the force sensor E32 The jacket is between the cores of the two connecting flanges, and the round pin head end of the connecting rod G31 is embedded in the chute directly in front of the connecting shaft 8 squares.

The piston shaft bowl of the bending test hydraulic cylinder B14 corresponds to the right side of the connecting shaft 8 square body. The piston shaft bowl of the bending test hydraulic cylinder B14 is hinged with the ball end of the connecting rod B12 through the ball joint B13, and the flange end of the connecting rod B12 is connected to the flange and the flange end of the connecting rod C22 in sequence through bolts, and the force sensor The B23 jacket is between the cores of the two connecting flanges, and the head end of the connecting rod C22 round pin is embedded in the chute on the right side of the connecting shaft 8 square body.

The fixed locking mechanism includes locking hydraulic cylinder A7, locking hydraulic cylinder B15 and bearing small end clamp 5.

The waist of the bearing small end clamp 5 is a flat cuboid, the top of the flat cuboid is provided with a spline shaft, and the bottom of the flat cuboid is a bar block, and the bar block is provided with mounting holes.

The locking hydraulic cylinder A7 and the piston head ends of the locking hydraulic cylinder B15 are all provided with bar U-shaped jaws.

The locking mechanism is set in the middle layer of the equipment, using the locking hydraulic cylinder A7 and locking hydraulic cylinder B15 as the power source, and the two directions that are horizontally coplanar and collinear with the bearing small end clamp 5 act on the same point force system.

The upper part of the small end fixture 5 of the bearing is splined in the spline hole of the connecting shaft 8 of the Y-axis and Z-axis bending test mechanism.

The piston head end of the locking hydraulic cylinder A7 and the piston head end of the locking hydraulic cylinder B15 are arranged on the left and right sides of the small end fixture 5 of the bearing oppositely, and the U-shaped jaw of the locking hydraulic cylinder A7 is aligned with the U-shaped jaw of the locking hydraulic cylinder B15. Shape jaws are respectively clamped on the left and right sides of the flat parallelepiped of bearing small end clamp 5.

Technical effect of the present invention is embodied in the following aspects:

1. From the aspect of the design mechanism, the problem of motion interference in the detection of different stiffness characteristics and the coupling detection of multiple stiffness characteristics has been fully considered, and the small end of the elastic bearing is eliminated by arranging hydraulic cylinders on the left and right sides of the small end fixture. The degree of freedom of the axis, thereby improving the accuracy of the detection when performing the torsional stiffness test of the elastic bearing around the X axis;

2. Different types of elastic bearings can be tested by replacing the elastic bearing fixture, which realizes the detection of the stiffness characteristics of the elastic bearings of different types of helicopter rotor systems on one test platform, and the universal type is good;

3. In terms of practical operation, the present invention satisfies the one-time clamping of the elastic bearing, and can separately or simultaneously load the three-dimensional force and moment of the elastic bearing. The process of replacing the test bench during the detection of different stiffness characteristics improves the detection efficiency, reduces the detection intensity of the detection personnel, and improves the safety of the detection process personnel;

4. From the overall analysis point of view, through the application of the present invention, the elastic bearing can be clamped on a detection platform at one time, and the multi-dimensional direction force (moment) can be loaded and measured at the same time, so that the detection efficiency of the product can be increased by about 20 %, the work intensity of testing personnel is reduced by about 60%.

Description of drawings

Fig. 1 is a three-dimensional schematic diagram of the present invention.

Fig. 2 is a front view of the test device of the present invention.

Fig. 3 is an exploded view of the main components of the detection device along the X-direction axis of the present invention.

Fig. 4 is an exploded view of the measuring base and the torsion testing mechanism around the X-axis of the present invention.

Fig. 5 is an exploded view of the Y-axis and Z-axis bending test mechanism of the present invention.

Serial numbers in the figure: 1 base of detection table, 2 rotating shaft, 3 fixture of large end of bearing, 4 laser displacement sensor A, 5 fixture of small end of bearing, 6 hydraulic cylinder for bending test A, 7 hydraulic cylinder for locking, 8 connecting shaft, 9 Connecting rod A, 10 Compression test hydraulic cylinder, 11 Ball hinge A 12 Connecting rod B, 13 Ball hinge B, 14 Bending test hydraulic cylinder B, 15 Locking hydraulic cylinder B, 16 Laser displacement sensor B, 17 Laser displacement sensor C, 18 Torsion test hydraulic cylinder B, 19 Laser displacement sensor D, 20 Elastic bearing, 21 Force sensor A, 22 Connecting rod C, 23 Force sensor B, 24 Torsion test hydraulic cylinder A, 25 Force sensor C, 26 Connecting rod D, 27 Force sensor D, 28 connecting rod E, 29 ball hinge C, 30 connecting rod F, 31 connecting rod G, 32 force sensor E.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described further through embodiment.

See Figure 1. A helicopter rotor system elastic bearing load measurement device, including a measurement base, an X-axis test mechanism, a Y-axis and a Z-axis bending test mechanism, a locking mechanism, and a torsion test mechanism around the X-axis.

See Figure 4. The measuring base is composed of a testing platform base 1, a rotating shaft 2, and a bearing big end fixture 3, and is arranged at the bottom of the device; the upper end surface of the testing platform base 1 is provided with a bearing seat. The testing platform base 1 is fixed on the ground and has sufficient strength, which can ensure the safety of the testing process and the stability of the testing results. The core of the shaft body of the rotating shaft 2 is provided with a spline hole, and the waist of the shaft body of the rotating shaft 2 is provided with a turntable, and a pair of hinge holes are symmetrically arranged on the turntable. The tail of the bearing big end fixture 3 is a spline shaft, and the head is provided with U-shaped jaws, and mounting holes are provided on both sides of the jaws; in the bearing hole. The axle body spline of rotating shaft 2 is connected with the afterbody of bearing big end clamp 3. The U-shaped jaws of the bearing big end clamp 3 face upward.

See Figure 2. Its bottom of elastic bearing 20 is a square, its waist is a truncated cone, and its top is provided with a U-shaped mouth. The square body of the elastic bearing 20 is installed on the U-shaped jaw of the bearing big end fixture 5 and fixed by bolts; the X-axis testing mechanism is arranged on the top of the device. The installation center of the X-axis test mechanism is coaxial with the center of the bearing seat hole of the test bench base 1, and the two form the X-axis axis line of the loading measurement system; twist the test mechanism around the X-axis, the locking mechanism, and the Y-axis The bending test mechanisms in the X-axis and Z-axis are respectively arranged in the lower, middle and upper layers of the equipment in sequence from bottom to top along the axis of the X-axis.

See Figure 4. The torsion test mechanism around the X axis includes the torsion test hydraulic cylinder A24 and the torsion test hydraulic cylinder B18 as the power source, and the connecting rod D26, the force sensor C25, the connecting rod E28, and the force sensor D 27 form a force couple that is horizontal and coplanar. system, and are connected together by the rotating shaft 2 and installed on the lower floor of the equipment; the flange end of the piston of the torsion test hydraulic cylinder A24 faces to the right and is set on the left rear of the rotating shaft 2, and is connected to the flange plate and the connecting rod D26 in turn by bolts flanged end. The force sensor C25 is jacketed between the cores of the two connection flanges. The connecting rod end of the connecting rod D26 is hinged on one end hinge hole of the rotating shaft 2 rotating disks.

The flange end of the piston of the torsion test hydraulic cylinder B18 faces left and is arranged in front of the right side of the rotating shaft 2, and is connected to the flange plate and the flange end of the connecting rod E28 in sequence through bolts. The force sensor D 27 is jacketed between the cores of the two connecting flanges. The connecting rod end of the connecting rod E28 is hinged on the other end hinge hole of the rotating shaft 2 turntable; the torsion test hydraulic cylinder A24 has the same specifications and models as the torsion test hydraulic cylinder B18. This group of force sensors is used to measure the clockwise or counterclockwise force applied to the rotating shaft 2 by the torsion test hydraulic cylinder A24 and the torsion test hydraulic cylinder B18, and then convert the clockwise force applied to the rotating shaft 2 according to the radius of the turntable. Or counterclockwise torque.

A laser displacement sensor D19 is installed on the base 1 of the detection table. When the torsion test hydraulic cylinder A24 and the torsion test hydraulic cylinder B18 push the turntable to rotate and then apply a certain torque to the elastic bearing 20 through the rotating shaft 2 and the bearing big end clamp 5, the laser displacement sensor D19 can measure the angle that the turntable has turned, so as to determine the angle that the elastic bearing 20 has turned.

See Figure 3. The X-axis testing mechanism arranged on the top of the equipment includes a compression test hydraulic cylinder 10 as a power source, and a vertical downward force application system composed of a connecting rod A9 and a force sensor A21; the upper end of the connecting rod A9 is a ball end, and its The lower end is a flange; the compression test hydraulic cylinder 10 is fixedly connected to the support of the device by bolts, and the piston head of the compression test hydraulic cylinder 10 is vertically downward, and is connected with the ball end of the connecting rod A9 through the ball joint A11. The connection through the ball hinge can ensure that the connecting rod A9 has degrees of freedom in the Y-axis and Z-axis, and avoid the bending deformation interference of the connecting rod A9 in the Y-axis and Z-axis. The flange end of the connecting rod A9 is connected with the flange end of the flange and the connecting rod A9 in turn by bolts. The force sensor A21 is jacketed between the cores of the two connecting flanges, and the pressure sensor is used to measure the pressure exerted by the compression testing hydraulic cylinder 10 on the elastic bearing 20 .

A laser displacement sensor C17 is provided at a direction of 45 degrees from the positive direction of the Z axis to the positive direction of the Y axis. When the compression test hydraulic cylinder 10 applies a certain pressure in the X axis to the elastic bearing 20, the laser displacement sensor C17 can measure the elastic bearing 20 in the X direction. Axial compression.

See Figure 5. The Y-axis and Z-axis bending test mechanisms include the bending test hydraulic cylinder B14 and the bending test hydraulic cylinder A6 as the power source, and the connecting shaft 8, the connecting rod C22, the force sensor B23, the connecting rod B12 and the connecting rod F30, and the force sensor E32 and connecting rod G31 constitute a force application system in which two directions perpendicular to each other act on the same point in the horizontal coplanar plane.

The square body of connecting shaft 8 is provided with a flange on its top, and the circular boss core of its bottom is provided with a spline hole, and the front side and right side of connecting shaft 8 square body are respectively provided with a vertical chute. The function of the vertical chute on the front and right side of the connecting shaft 8 is to ensure the degree of freedom of the connecting shaft 8 in the X-axis, to meet the compression displacement of the elastic bearing in the X-axis (maximum 2 mm), and to avoid movement interference. At the same time, the chute can ensure that the connecting rod C22 and the connecting rod connecting rod G31 are always perpendicular to the plane of the connecting shaft 8; It has the same shape and structure as the connecting rod C22, with a round pin head at one end and a flange at the other end; the flange end of the connecting shaft 8 is connected to the flange end of the connecting rod A9 of the X-axis testing mechanism through the flange.

The Y-axis and Z-axis bending test mechanisms are arranged on the upper layer of the equipment by connecting with the connecting shaft 8.

The piston shaft bowl of the bending test hydraulic cylinder A6 corresponds to the front of the connecting shaft 8 square body. The piston shaft bowl of the bending test hydraulic cylinder A6 is hinged together with the ball end of the connecting rod G30 through the ball joint C29, the flange end of the connecting rod G30 is connected to the flange plate and the flange end of the connecting rod G31 in sequence through bolts, and the force sensor E32 The jacket is between the cores of the two connecting flanges. The head end of the connecting rod G31 round pin is embedded in the chute directly in front of the connecting shaft 8 square body, and can slide in a short distance up and down in the chute (no more than 3 mm). The force sensor E32 can measure the forward or reverse force of the Z axis acting on the connecting shaft 8 by the bending test hydraulic cylinder A6; the piston shaft bowl of the bending test hydraulic cylinder B14 corresponds to the right side of the connecting shaft 8 square body. The piston shaft bowl of the bending test hydraulic cylinder B14 is hinged with the ball end of the connecting rod B12 through the ball joint B13, and the flange end of the connecting rod B12 is connected to the flange and the flange end of the connecting rod C22 in sequence through bolts, and the force sensor The B23 jacket is between the cores of the two connecting flanges. The head end of the connecting rod C22 round pin is embedded in the chute on the right side of the connecting shaft 8 square body, and can slide in a short distance up and down in the chute (no more than 3 mm). The force sensor B23 can measure the positive or reverse force of the Y axis that the bending test hydraulic cylinder B14 acts on the connecting shaft 8 .

See Figure 3. The locking mechanism includes a locking hydraulic cylinder A7, a locking hydraulic cylinder B15 and a clamp 5 at the small end of the bearing.

The waist of the bearing small end clamp 5 is a flat cuboid, the top of the flat cuboid is provided with a spline shaft, and the bottom of the flat cuboid is a bar block, and the bar block is provided with mounting holes; Lock hydraulic cylinder A7, lock The piston head of the stop hydraulic cylinder B15 is equipped with bar U-shaped jaws; the stop lock mechanism is set in the middle layer of the equipment, using the lock hydraulic cylinder A7 and the lock hydraulic cylinder B15 as the power source, and is connected with the small end of the bearing. 5 constitute a force application system with two directions that are horizontally coplanar and collinear and act on the same point; the upper part of the bearing small end fixture 5 is splined in the spline hole of the connecting shaft 8 of the Y-axis and Z-axis bending test mechanism .

The piston head end of the locking hydraulic cylinder A7 and the piston head end of the locking hydraulic cylinder B15 are arranged on the left and right sides of the small end fixture 5 of the bearing oppositely, and the U-shaped jaw of the locking hydraulic cylinder A7 is aligned with the U-shaped jaw of the locking hydraulic cylinder B15. Shaped jaws are respectively clamped on the left and right sides of the flat parallelepiped of bearing small end fixture 5;

During installation, ensure that the elastic bearing 20 is coaxial with the X-direction axis.

Locking hydraulic cylinder A7 and locking hydraulic cylinder B15 are symmetrically arranged at the left and right ends of the bearing small end fixture 5, and its function is to fix the elastic bearing 20 on the bearing small end fixture 5 when the torsional stiffness is tested, so as to ensure the elastic bearing 20 Accuracy of applied torque.

When the elastic bearing 20 bends under the force of the bending test hydraulic cylinder A6 or the bending test hydraulic cylinder B14, the entire elastic bearing 20 and the connecting shaft 8 will elongate due to bending, but because the elongation is very small, the key The connection can slide slightly on the keyway to compensate for the elongation, thereby preventing motion interference and improving the accuracy of the test and the safety of the equipment; a laser displacement sensor A4 is provided directly in front of the elastic bearing 20, when the elastic bearing 20 is in the When the Z bearing is subjected to the force applied by the bending test hydraulic cylinder A6, the laser displacement sensor A4 can measure the displacement of the elastic bearing 20 in the Z-axis direction.

A laser displacement sensor B16 is provided on the right side of the elastic bearing 20. When the elastic bearing 20 is subjected to the force applied by the bending test hydraulic cylinder B28 at the Y bearing, the laser displacement sensor B16 can measure the displacement of the elastic bearing 20 in the Y-axis direction.

Working principle of the present invention:

1. Test the X-axis stiffness characteristics of elastic bearings

See Figure 2. Keep the compression test when the hydraulic cylinder 10 is working to apply pressure to the elastic bearing 20, and the other hydraulic cylinders are not working. The pressure on the elastic bearing 20 can be directly measured through the pressure sensor A21, and the elasticity under this pressure can be measured through the laser displacement sensor C17. The X-axis compressive deformation of the bearing 20 is calculated through the measured pressure and compressive deformation, and the X-axial compressive stiffness is calculated;

2. Test the bending stiffness characteristics of the elastic bearing in the Z-axis

See Figure 5. Keep the bending test hydraulic cylinder A6 working, and the other hydraulic cylinders do not work. The bending force on the elastic bearing 20 in the Z-axis direction can be directly measured through the force sensor E32, and the bending moment can be further calculated. At the same time, it can be measured through the laser displacement sensor A4 Based on the bending angle of the elastic bearing 20 under the bending force, the bending stiffness in the Z-axis can be calculated through the measured Z-axis bending moment and bending angle. In this test, under the action of the console control valve, the bending test hydraulic cylinder A6 can respectively apply a force in the Z-axis direction to the elastic bearing 20, and the pressure can be measured by the force sensor E32, and finally the elastic bearing 20 can be measured in the Z-axis direction. Bending stiffness in direction;

3. Test the bending stiffness characteristics of the elastic bearing in the Y-axis

See Figure 5. Keep the bending test hydraulic cylinder B14 working, and the other hydraulic cylinders do not work. The bending force on the elastic bearing 20 in the Y-axis direction can be directly measured through the force sensor B23, and the bending moment can be further calculated. At the same time, it can be measured through the laser displacement sensor B16 Based on the bending angle of the elastic bearing 20 under the bending force, the bending stiffness in the Y-axis can be calculated through the measured Y-axis bending moment and bending angle. In this test, under the action of the console control valve, the bending test hydraulic cylinder B14 can apply force in the Y-axis direction to the elastic bearing 20 respectively, and the pressure can be measured by the force sensor B23, and finally the elastic bearing 20 can be measured in the Y-axis direction. Bending stiffness in the direction;

4. Test the torsional rigidity of the elastic bearing around the X axis

See Figure 2 and Figure 4. The locking hydraulic cylinder A7 and the locking hydraulic cylinder B15 work to fix the elastic bearing 20, and at the same time the torsion test hydraulic cylinder A24 and the torsion test hydraulic cylinder B18 work to apply force to the rotating shaft 2 through the turntable, and through the force sensor C25 and the force sensor D27 measures the force that the torsion test hydraulic cylinder A24 and the torsion test hydraulic cylinder B18 act on the rotating shaft 2 at this time, because the radius of the turntable is fixed and known, so the torsion test hydraulic cylinder A24 and the torsion test hydraulic cylinder B18 can act on the rotating shaft 2 The force on the shaft 2 results in the torque experienced by the elastic bearing 20 . At the same time, the deflection angle of the elastic bearing 20 around the X-axis can be measured by the laser displacement sensor D19, and the torsional stiffness of the elastic bearing 20 around the X-axis can be calculated through the measured torque and rotation angle. In this test, under the action of the console control valve, the torsion test hydraulic cylinder A24 and the torsion test hydraulic cylinder B18 can provide torque in both clockwise and counterclockwise directions to the elastic bearing 20, so it can be measured that the elastic bearing 20 rotates around X The torsional stiffness of the shaft in both clockwise and counterclockwise directions;

5. The above four stiffness testing methods are performed simultaneously, which can test the stiffness characteristics of elastic bearings in various dimensions under simultaneous coupling effects such as compression, torsion, and bending.

Claims (5)

1. helicopter rotor system resilient bearing loads a measuring equipment, it is characterized in that: comprise measurement pedestal, X axis mechanism for testing, Y-axis and Z-axis direction crooked test mechanism, to lock locking mechanism, reverse mechanism for testing around X axis;

Described measurement pedestal forms by monitor station base (1), rotation axis (2), the large end fixture (3) of bearing the bottom being arranged on this equipment;

Described monitor station base (1) upper surface is provided with bearing seat; The axis body core of described rotation axis (2) is provided with splined hole, and rotation axis (2) axis body waist is provided with rotating disk, and rotating disk is provided with a pair pan symmetrically; Its afterbody of the large end fixture (3) of described bearing is splined shaft, and its head is provided with U-shaped jaw, and jaw both sides external is provided with mounting hole;

Described rotation axis (2) axis body bottom is set in monitor station base (1) bearing saddle bore by thrust bearing; The axis body spline joint of described rotation axis (2) the afterbody of the large end fixture (3) of bearing; The U-shaped jaw of the large end fixture (3) of described bearing upward;

Described X axis mechanism for testing is arranged on the top of this equipment; The mounting center of X axis mechanism for testing and monitor station base (1) bearing saddle bore central coaxial, and both form the X of loading measurement system to axial line;

Described around X axis torsion mechanism for testing, lower floor lock locking mechanism, Y-axis and Z-axis direction crooked test mechanism being arranged on respectively with being corresponding in turn to from the bottom to top to this equipment along X to axial line, middle level and upper strata.

2. a kind of helicopter rotor system resilient bearing according to claim 1 loads measuring equipment, it is characterized in that: describedly reverse mechanism for testing around X axis and comprise reversing test fluid cylinder pressure A(24) and torsion test fluid cylinder pressure B(18) be power source, by connecting rod D(26), force snesor C(25) and connecting rod E(28), force snesor D (27) forms the couple force application system of coplanar horizontal, and the lower floor of the equipment that is arranged on that linked together by rotation axis (2);

Described torsion test fluid cylinder pressure A(24) piston flange end is arranged on the left back of rotation axis (2), and is connected to ring flange and connecting rod D(26 successively by bolt towards the right side) flange end; Described force snesor C(25) chuck is between the core of two mounting flanges; Described connecting rod D(26) connecting-rod head is hinged on one end pan of rotation axis (2) rotating disk;

Described torsion test fluid cylinder pressure B(18) piston flange end is arranged on the right front of rotation axis (2), and is connected to ring flange and connecting rod E(28 successively by bolt towards a left side) flange end; Described force snesor D (27) chuck is between the core of two mounting flanges; Described connecting rod E(28) connecting-rod head is hinged on the other end pan of rotation axis (2) rotating disk.

3. a kind of helicopter rotor system resilient bearing according to claim 1 loads measuring equipment, it is characterized in that: described in be arranged on equipment top X axis mechanism for testing comprise with compression verification hydraulic cylinder (10) for power source, by connecting rod A(9), force snesor A(21) form force application system straight down;

Described connecting rod A(9) its upper end is bulb end, its lower end is ring flange;

Described compression verification hydraulic cylinder (10) is bolted to connection on the support of this equipment, the piston head of compression verification hydraulic cylinder (10) straight down, and by spherical hinge A(11) with connecting rod A(9) bulb end be connected; Described connecting rod A(9) ring flange end be connected to ring flange and connecting rod A(9 successively by bolt) flange end, described force snesor A(21) chuck is between the core of two mounting flanges.

4. a kind of helicopter rotor system resilient bearing according to claim 1 loads measuring equipment, it is characterized in that: described Y-axis and Z-axis direction crooked test mechanism comprise with crooked test hydraulic cylinder B(14) and crooked test hydraulic cylinder A(6) for power source, by coupling shaft (8), connecting rod C(22), force snesor B(23), connecting rod B(12) and connecting rod F(30), force snesor E(32), connecting rod G(31) form the force application system that the orthogonal both direction of coplanar horizontal acts on same point;

Its top of square body of described coupling shaft (8) is provided with flange, and the circular bosses core of its underpart is provided with splined hole, and described coupling shaft (8) square body just above and right flank be respectively equipped with a vertical chute;

Described connecting rod F(30) with connecting rod B(12) contour structures is identical, one end is ring flange, and the other end is bulb end; Described connecting rod G(31) with connecting rod C(22) contour structures is identical, one end is round pin head, and the other end is ring flange;

Described coupling shaft (8) flange end by ring flange with the connecting rod A(9 of X axis mechanism for testing) flange end be connected;

Described Y-axis and Z-axis direction crooked test mechanism are by being connected the upper strata of the equipment of being arranged on coupling shaft (8);

Described crooked test hydraulic cylinder A(6) piston axle bowl and coupling shaft (8) square body corresponding just above; Crooked test hydraulic cylinder A(6) piston axle bowl by spherical hinge C(29) with connecting rod G(30) bulb end is hinged, described connecting rod G(30) flange end is connected to ring flange and connecting rod G(31 successively by bolt) ring flange end, described force snesor E(32) chuck between the core of two mounting flanges, described connecting rod G(31) round pin head end embed coupling shaft (8) square body just before chute in;

Described crooked test hydraulic cylinder B(14) piston axle bowl corresponding with coupling shaft (8) square body right flank; Crooked test hydraulic cylinder B(14) piston axle bowl with by spherical hinge B(13) with connecting rod B(12) bulb end is hinged, described connecting rod B(12) flange end is connected to ring flange and connecting rod C(22 successively by bolt) ring flange end, described force snesor B(23) chuck between the core of two mounting flanges, described connecting rod C(22) round pin head end embed coupling shaft (8) square body right flank chute in.

5. a kind of helicopter rotor system resilient bearing according to claim 1 loads measuring equipment, it is characterized in that: describedly comprise locking hydraulic cylinder A(7 to lock locking mechanism), locking hydraulic cylinder B(15) and bearing small end fixture (5);

The waist of described bearing small end fixture (5) is flat-square shaped, and the top of flat-square shaped is provided with splined shaft, and the bottom of flat-square shaped is bar blocks, and bar blocks is provided with mounting hole;

Described locking hydraulic cylinder A(7), locking hydraulic cylinder B(15) piston head end is equipped with stick U-shaped jaw;

The described middle level being arranged on equipment to lock locking mechanism is with locking hydraulic cylinder A(7) and locking hydraulic cylinder B(15) for power source, and form coplanar horizontal with bearing small end fixture (5) and the both direction of conllinear acts on the force application system of same point;

Described bearing small end fixture (5) top spline joint is in the splined hole of the coupling shaft (8) of Y-axis and Z-axis direction crooked test mechanism;

Described locking hydraulic cylinder A(7) piston head end and locking hydraulic cylinder B(15) piston head end is oppositely arranged on the left and right side of bearing small end fixture (5), and locking hydraulic cylinder A(7) U-shaped jaw and locking hydraulic cylinder B(15) U-shaped jaw be clamped in respectively on the left and right limit of the flat-square shaped of bearing small end fixture (5).