A helicopter engine input end shaft bearing test loading device

Abstract

The present invention provides a helicopter engine input end shaft system bearing test loading device, characterized in that it comprises: an input power unit; a bearing installation unit, the bearing installation unit is connected to the output end of the input power unit; and a loading unit, the loading unit is arranged above the output end of the input power unit and is arranged in contact with the bearing installation unit; the input power unit drives a first test bearing installed on the bearing installation unit to rotate; the loading unit loads the rotating first test bearing to test the performance parameters of the first test bearing; the loading unit and the input power unit are arranged perpendicular to each other and the loading block is arranged in a conical shape and cooperates with the conical loading part to realize simultaneous loading of the bearing to be tested, and simultaneously provide axial force and radial force, and the force size is controllable, thereby improving the accuracy of the parameters of the bearing to be tested.

Description

Technical Field

[0001] The invention relates to the technical field of bearing life test, and in particular to a helicopter engine input end shaft system bearing test loading device. Background Art

[0002] The high-speed rotation of the helicopter engine input end provides power for the propeller, and the bearing of the input shaft system plays a vital role in the rotation of the input shaft. The life of the bearing determines the safety factor of the helicopter. The existing fatigue life test equipment has a single test performance parameter and cannot accurately and comprehensively evaluate the life of the test bearing, resulting in overly conservative data and great waste.

[0003] Chinese patent CN 205981688U discloses a joint bearing life tester, which relates to a bearing tester, including an operating table and a test main body part arranged on the operating table, the test main body part including a test spindle, a bearing fixture, a load loading device, a torque sensor and a transmission shaft, the two ends of the test spindle are respectively supported by a left support assembly and a right support assembly for rotation, the transmission shaft is connected to one end of the test spindle through a torque sensor, an angle encoder is installed at the other end of the test spindle, the test bearing is installed in the bearing fixture and the inner ring of the test bearing is fixed on the test spindle, the two end faces of the inner ring of the test bearing are respectively clamped between the left support assembly and the right support assembly through a left sleeve ring and a right sleeve ring set on the test spindle, the transmission shaft is driven by a crank rocker mechanism and drives the test bearing to reciprocate and rotate and swing through the test spindle, and the load loading device applies a radial load to the test bearing through the bearing fixture. The utility model can efficiently detect the life of the joint bearing and evaluate the reliability of the joint bearing.

[0004] However, this technical solution only realizes radial loading, and cannot realize axial loading.

[0005] Chinese patent CN 205280360U discloses a bearing tester, including a test shaft for the axis of the tested bearing to be installed extending in the left and right directions, a bearing seat, and an axial loading device arranged on the left side of the test shaft, the axial loading device having an axial loading input shaft capable of outputting left and right reciprocating motions, and the power output end of the axial loading input shaft is connected to the bearing seat or the test shaft in a transmission manner to apply an axial load to the tested bearing. It is realized that a load in the axial direction to the left can be applied to the tested bearing, and a load in the axial direction to the right can also be applied to the tested bearing. Unlike the prior art that only a unidirectional force in the axial direction can be applied to the tested bearing by relying on a spring, the utility model can more realistically simulate the actual force condition of the bearing, and accurately and effectively perform a life detection test on the tested bearing.

[0006] However, this solution only realizes axial loading and cannot simultaneously load the test bearing axially and radially to meet the test conditions of different working conditions. Summary of the invention

[0007] The purpose of the present invention is to address the deficiencies in the prior art and to provide a helicopter engine input end shaft bearing test loading device, which realizes simultaneous loading of the bearing to be tested and provides axial force and radial force at the same time through the loading unit and input power unit arranged perpendicular to each other and the conical loading block cooperating with the conical loading part, and the magnitude of the force is controllable, thereby improving the authenticity, accuracy and comprehensiveness of the parameters of the bearing to be tested.

[0008] To achieve the above object, the present invention provides the following technical solutions:

[0009] A helicopter engine input end shaft bearing test loading device,

[0010] The invention is characterized by comprising:

[0011] Input power unit;

[0012] a bearing installation unit, the bearing installation unit being connected to an output end of the input power unit; and

[0013] A loading unit, the loading unit is arranged above the output end of the input power unit and is arranged in contact with the bearing installation unit;

[0014] The input power unit drives the first test bearing mounted on the bearing mounting unit to rotate;

[0015] The loading unit loads the rotating first test bearing to test the performance parameters of the first test bearing;

[0016] The bearing installation unit comprises:

[0017] transmission shaft;

[0018] The transmission shaft is hollow.

[0019] As an improvement, the axis of the loading unit and the axis of the input power unit are arranged perpendicular to each other.

[0020] As an improvement, the bearing installation unit further includes:

[0021] Input bearing seat;

[0022] One end of the transmission shaft is connected to the output end of the input power unit, and the transmission shaft is rotatably linked to the input bearing seat through a first test bearing.

[0023] As an improvement, a conical loading portion is provided at one end of the transmission shaft; one side of the conical loading portion is rotatably connected to the second test bearing.

[0024] As an improvement, the loading unit comprises:

[0025] A loading power unit, wherein an output end of the loading power unit is connected to a loading head; and

[0026] A loading block is sleeved on the transmission shaft and matched with the conical loading portion, and the output end of the loading power unit acts on the top end of the loading block.

[0027] As an improvement, the center line of the loading block is arranged to coincide with the center line of the conical loading portion.

[0028] As an improvement, the loading unit further includes:

[0029] An isolation pad is arranged on one side of the loading block.

[0030] As an improvement, the bearing installation unit also includes a bearing outer sleeve arranged on the input bearing seat; the inner diameter of the bearing outer sleeve matches the first test bearing, and the outer diameter of the bearing outer sleeve matches the inner diameter of the input bearing seat.

[0031] As an improvement, the transmission shaft is connected to the input power unit via a plum blossom elastic coupling.

[0032] As an improvement, a plurality of oil grooves are provided on the outer diameter of the transmission shaft at positions corresponding to the first test bearing.

[0033] The beneficial effects of the present invention are:

[0034] (1) The present invention realizes that the first test bearing and the second test bearing are loaded with axial force and radial force at the same time by means of the loading unit and the input power unit arranged perpendicular to each other and the conical loading block cooperated with the conical loading part, thereby improving the controllability of the force of the test bearing, and further improving the accuracy, authenticity and comprehensiveness of the test parameters of the test bearing;

[0035] (2) The present invention simultaneously completes the performance tests of the two groups of test bearings by arranging two groups of test bearings on both sides of the conical loading portion, thereby improving the test efficiency and making the stress conditions of the test bearings more compatible with the actual conditions;

[0036] (3) The present invention avoids the contact between the test bearing and the bearing seat, which may cause wear of the bearing seat during long-term testing, by means of the outer bearing bushing disposed in the bearing seat, thereby ensuring that the basic equipment parameters of different batches of test bearings are substantially the same, thereby improving the accuracy and authenticity of the test parameters of the test bearings;

[0037] (4) The present invention ensures the stable supply of lubricating medium during the test bearing test process by providing an oil groove on the outer diameter of the transmission shaft that matches the raceway position of the corresponding test bearing and a channel for the flow of lubricating medium on the inner ring of the test bearing, thereby solving the problem of reduced bearing life due to lack of lubricating medium during the test bearing test process;

[0038] (5) The present invention adopts a hollow transmission shaft to match the inner contour with the outer contour, thereby reducing the eccentric vibration caused by the rotation of the transmission shaft due to its own weight during rotation, reducing the variables of the experimental process, and improving the accuracy and pertinence of data collection during the test process.

[0039] In summary, the present invention has the advantages of high test accuracy, easy installation, controllable test parameters, and closer to actual working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0041] Figure 2 This is a structural schematic diagram of a bearing installation unit of the present invention;

[0042] Figure 3 This is a partial enlarged schematic diagram of point A in coating 2 of the present invention;

[0043] Figure 4 This is a schematic diagram of the loading block structure of the present invention;

[0044] Figure 5 This is a schematic diagram of the structure of the loading head of the present invention;

[0045] Figure 6 This is a schematic diagram of the transmission shaft structure of the present invention;

[0046] Figure 7 This is a schematic diagram of the inner ring structure of the deep groove ball bearing of the present invention;

[0047] Figure 8 It is a schematic diagram of the structure of the inner ring of the cylindrical roller bearing of the present invention. DETAILED DESCRIPTION

[0048] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0049] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0050] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0051] Embodiment 1

[0052] like Figure 1 As shown, a helicopter engine input end shaft bearing test loading device comprises: a housing 1; and also comprises:

[0053] An input power unit 2, the input power unit 2 is arranged on one side of the housing 1; the input power unit 2 adopts an electric spindle;

[0054] a bearing installation unit 3, wherein the bearing installation unit 3 is connected to the output end of the input power unit 2 and is disposed on the housing 1; and

[0055] A loading unit 4, wherein the loading unit 4 is disposed above the output end of the input power unit 2 and is in contact with the bearing installation unit 3;

[0056] The input power unit 2 drives the first test bearing 100 mounted on the bearing mounting unit 3 to rotate;

[0057] The loading unit 4 loads the rotating bearing to test the performance parameters of the first test bearing 100;

[0058] It should be noted that the first test bearing 100 includes a group of bearings, one group is a deep groove ball bearing 111 , and the other group is a cylindrical roller bearing 112 .

[0059] As an improvement, Figure 1 As shown, the axis of the loading unit 4 and the axis of the input power unit 2 are arranged perpendicular to each other;

[0060] It should be noted that the loading unit and the input power unit that are arranged perpendicular to each other cooperate with the loading part that is arranged conically, so that the force acting on the test bearing is more stable, the magnitude of the force is easier to control, and the accuracy of the test data is improved.

[0061] In this embodiment, Figure 2 As shown, the bearing installation unit 3 includes:

[0062] An input bearing seat 31 , wherein the input bearing seat 31 penetrates through the side wall of the housing 1 and is installed on the housing 1 , and the inner diameter of the input bearing seat 31 is used for installing the first test bearing 100 ; and

[0063] A transmission shaft 32 , one end of which is connected to the output end of the input power unit 2 , and the transmission shaft 32 is rotationally linked to the input bearing seat 31 through a first test bearing 100 ; a conical loading portion 322 is provided at the other end of the transmission shaft 32 .

[0064] Among them, Figure 1 As shown, a mounting plate 11 for mounting a second test bearing 200 is provided in the housing 1, and the other end of the transmission shaft 32 is rotatably connected to the second test bearing 200;

[0065] It should be noted that a space for accommodating the loading part is formed between the mounting plate 11 and the inner wall of the housing 1 , and the loading part performs loading in the space.

[0066] As an improvement, Figure 1 , 5 As shown, the loading unit 4 includes:

[0067] A loading power unit 41, wherein the loading power unit 41 is disposed on the housing 1, and an output end thereof is connected to a loading head 411; and

[0068] A loading block 42, wherein the loading block 42 is sleeved on the transmission shaft 32 and matched with the conical loading portion 322, and the output end of the loading power unit 41 acts on the top end of the loading block 42;

[0069] It should be noted that one end of the loading head 411 is connected to the output end of the loading power unit 41 through a threaded connection, and the other end thereof is provided with a spherical loading contact head 412;

[0070] The loading power unit 41 is preferably driven by a hydraulic cylinder;

[0071] The center line of the loading block 42 is arranged to coincide with the center line of the conical loading portion 322, and the center of the loading head 411 is arranged to coincide with the center of the loading block 42. By applying force vertically to the upper end of the loading block 42, the force is transmitted to the transmission shaft 32 evenly and stably, thereby ensuring the force stability of the bearing to be tested and improving the accuracy of the test parameters.

[0072] like Figure 5 As shown, the loading block 42 has a square shape, and its inner hole is conical and matches the conical loading portion 322 .

[0073] Further, such as Figure 1 As shown, the loading unit 4 also includes:

[0074] An isolation pad 43, which is disposed between the loading block 42 and the mounting plate 11 and is used to isolate and support the loading block 42, so that the loading block 42 moves to one side after being stressed, and at the same time, prevents the mounting plate 11 from being worn after being stressed, thereby affecting the service life of the device; the loading block 42 is preferably made of polytetrafluoroethylene;

[0075] It should be noted that the output force of the loading power unit 41 acts vertically on the loading block 42 through the loading head 411, and the transmission shaft 32 is subjected to radial force and axial force by utilizing the conical loading portion 322 and the isolation pad 43, which are further fed back to the first test bearing 100 and the second test bearing 200, and the bearings are loaded axially and radially at the same time, completing the performance test of the two groups of bearings.

[0076] In this embodiment, Figure 2 As shown, the bearing installation unit 3 further includes a bearing outer sleeve 33 disposed on the input bearing seat 31; the inner diameter of the bearing outer sleeve 33 matches the first test bearing 100, and the outer diameter of the bearing outer sleeve 33 matches the inner diameter of the input bearing seat 31;

[0077] It should be noted that the hardness of the bearing outer bushing 33 is less than the hardness of the input bearing seat 31, and the hardness of the bearing outer bushing 33 is adapted to the hardness of the bearing to be tested, thereby reducing the wear of the input bearing seat 31 during the test;

[0078] Furthermore, the provision of the bearing outer sleeve 33 reduces the wear of the input bearing seat 31, increases the service life of the input bearing seat 31, and allows for quick replacement of the bearing outer sleeve 33 according to the degree of wear, thereby ensuring similar accuracy of the bearing seat during installation of each batch of test bearings. A high-precision bearing mounting seat is utilized to ensure the authenticity of the data for each test, while improving the accuracy of the data during the test bearing test.

[0079] Further, such as Figure 1As shown, the transmission shaft 32 is connected to the input power unit 2 via a plum blossom elastic coupling 34;

[0080] It should be noted that when the transmission shaft 32 is loaded with force and moves to one side, the plum blossom elastic coupling 34 ensures a stable connection between the transmission shaft 32 and the input power unit 2 and does not affect the force on the transmission shaft 32 .

[0081] Embodiment 2

[0082] like Figure 2 , 6 -8, wherein the components identical or corresponding to those in the first embodiment are marked with the corresponding reference numerals in the first embodiment. For the sake of simplicity, only the differences from the first embodiment are described below. The second embodiment differs from the first embodiment in that:

[0083] In addition, if Figure 3 , 6 As shown, a plurality of oil grooves 321 are provided on the outer diameter of the transmission shaft 32 at positions corresponding to the first test bearing 100;

[0084] It should be noted that a lubricating medium flow channel 102 is provided on the inner ring of the first test bearing 100 , and the oil groove 321 is connected to the lubricating medium flow channel 102 ;

[0085] Among them, Figure 7 , 8 As shown, the channel 102 on the inner ring of the deep groove ball bearing 111 is opened on the end surface of the inner ring of the deep groove ball bearing 111, and its shape is a semicircular groove;

[0086] The channel 102 on the inner ring of the cylindrical roller bearing 112 is opened at an angle, and passes through the oil groove of the inner ring of the channel 102. The lubricating oil enters the oil groove and the raceway along the channel 102 for lubrication.

[0087] It should be noted that the oil groove 321 is used to store lubricating medium to ensure that when the test bearing rotates at high speed, the lubricating medium enters the bearing raceway through the lubricating medium flow channel 102 provided on the inner ring of the bearing to lubricate the bearing rollers, thereby reducing the impact of lack of lubricating medium on the test data during the rotation of the bearing.

[0088] Embodiment 3

[0089] like Figure 6 As shown, the components identical or corresponding to those in the first embodiment are marked with the corresponding reference numerals in the first embodiment. For the sake of simplicity, only the differences from the first embodiment are described below. The differences between the third embodiment and the first embodiment are as follows:

[0090] Further, such as Figure 6 As shown, the transmission shaft 32 is hollow;

[0091] It should be noted that the inner diameter shape of the transmission shaft 32 matches the outer diameter shape to reduce the vibration caused by the transmission shaft 32's own weight during high-speed rotation, which may affect the test results.

[0092] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A helicopter engine input end shaft bearing test loading device, It is characterized in that include: Input power unit (2); a bearing installation unit (3), the bearing installation unit (3) being connected to the output end of the input power unit (2); and A loading unit (4), the loading unit (4) being arranged above the output end of the input power unit (2) and being arranged in contact with the bearing mounting unit (3); The input power unit (2) drives a first test bearing (100) mounted on a bearing mounting unit (3) to rotate; The loading unit (4) loads the rotating first test bearing (100) to test the performance parameters of the first test bearing (100); The bearing installation unit (3) comprises: Transmission shaft (32); The transmission shaft (32) is hollow, and the inner diameter shape of the transmission shaft (32) matches the outer diameter shape; The bearing installation unit (3) further comprises: Input bearing seat (31); One end of the transmission shaft (32) is connected to the output end of the input power unit (2), and the transmission shaft (32) is rotatably linked to the input bearing seat (31) via a first test bearing (100); A conical loading portion (322) is provided at one end of the transmission shaft (32); one side of the conical loading portion (322) is rotatably connected to the second test bearing (200); The loading unit (4) comprises: A loading power unit (41), wherein an output end of the loading power unit (41) is connected to a loading head (411); and A loading block (42), wherein the loading block (42) is sleeved on the transmission shaft (32) and matched with the conical loading portion (322), and the output end of the loading power unit (41) acts on the top end of the loading block (42); The center line of the loading block (42) is arranged to coincide with the center line of the conical loading portion (322); The loading unit (4) further comprises: An isolation pad (43), the isolation pad (43) being arranged on one side of the loading block (42); A plurality of oil grooves (321) are provided at positions on the outer diameter of the transmission shaft (32) corresponding to the first test bearing (100); a lubricating medium flow channel (102) is provided on the inner ring of the first test bearing (100), and the oil grooves (321) are connected to the lubricating medium flow channel (102).

2. A helicopter engine input end shaft bearing test loading device according to claim 1, characterized in that: The axis of the loading unit (4) and the axis of the input power unit (2) are arranged perpendicular to each other.

3. A helicopter engine input end shaft bearing test loading device according to claim 1, characterized in that: The bearing installation unit (3) further comprises a bearing outer sleeve (33) arranged on the input bearing seat (31); the inner diameter of the bearing outer sleeve (33) matches the first test bearing (100), and the outer diameter of the bearing outer sleeve (33) matches the inner diameter of the input bearing seat (31).

4. A helicopter engine input end shaft bearing test loading device according to claim 1, characterized in that: The transmission shaft (32) is connected to the input power unit (2) via a plum blossom elastic coupling (34).

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