High-speed heavy-duty sliding bearing test structure

Abstract

The utility model discloses a high-speed heavy-duty sliding bearing test structure, which comprises a base, an oil supply shaft, a loading belt wheel, a loading bearing, a loading ring and a loading transverse shaft. The base is provided with a base plate and two supporting seats which extend upwards from the base plate and are arranged at intervals; the oil supply shaft is horizontally arranged on the base, and the two ends of the oil supply shaft are inserted and fixed into the two supporting bases. The loading belt wheel sleeves the oil supply shaft and can rotate relative to the oil supply shaft; an accommodating space is formed between the loading belt wheel and the oil supply shaft and is used for accommodating the sliding bearing; the loading bearing and the loading belt wheel are coaxially arranged, and the two ends of the loading belt wheel are sleeved with the loading bearing; the loading ring sleeves the loading bearing and is fixed relative to the loading bearing; and the loading transverse shaft is horizontally arranged at the upper end part of the supporting seat, abuts against the loading ring and is used for applying a load to the loading ring in the vertical direction. The loading bearing of the high-speed heavy-duty sliding bearing test structure is uniformly stressed while keeping a high rotating speed, and does not collide with the loading belt wheel to generate abnormal sound.

Description

Technical Field

[0001] The utility model belongs to the technical field of bearing testing, and in particular relates to a high-speed and heavy-load sliding bearing test structure. Background Art

[0002] Planetary gear trains are widely used in various mechanical equipment. With increasing demand, especially in aircraft engines, the rolling bearings used on planetary gear axles no longer meet operating conditions, necessitating the use of sliding bearings as replacements. Simulating the operating conditions of planetary gear axles and evaluating whether the sliding bearing's performance meets these requirements is crucial. In existing sliding bearing test structures, the loading bearing is mounted on a loading rod, with the outer ring of the loading bearing positioned within the roller track of the loading pulley. However, due to the misalignment between the outer ring of the loading bearing and the roller track, for example, the outer ring diameter of the loading bearing is half that of the loading pulley roller, meaning the loading bearing rotates at twice the speed of the loading pulley, hindering high-speed testing. Furthermore, the rotation of the outer ring of the loading bearing can collide with the outer ring of the loading pulley, creating an abnormal installation condition that significantly reduces bearing life. Excessive loading can also generate noise due to the rubbing of the two outer rings, hindering heavy-load testing.

[0003] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of the present invention, and should not be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. Utility Model Content

[0004] The purpose of the utility model is to provide a high-speed heavy-load sliding bearing test structure, which can make the loaded bearing more evenly stressed while maintaining a high speed, and will not collide with the loading pulley to produce abnormal noise.

[0005] In order to achieve the above-mentioned purpose, a specific embodiment of the present invention provides a high-speed heavy-load sliding bearing test structure, which includes: a base, an oil supply shaft, a loading pulley, a loading bearing, a loading ring and a loading horizontal shaft. The base has a base plate and two support seats extending upward from the base plate and spaced apart; the oil supply shaft is horizontally arranged on the base plate and the two ends of the oil supply shaft are respectively inserted and fixed in the two support seats; the loading pulley is sleeved on the oil supply shaft and can rotate relative to the oil supply shaft; a accommodating space is formed between the loading pulley and the oil supply shaft for accommodating the sliding bearing to be tested; the accommodating space is connected to the oil supply shaft; the loading bearing is coaxially arranged with the loading pulley and sleeved on both ends of the loading pulley; the loading ring is sleeved on the loading bearing and fixed relative to the loading bearing; the loading horizontal shaft is horizontally arranged at the upper end of the support seat and abuts against the loading ring, for applying a load to the loading ring in the vertical direction.

[0006] In one or more embodiments of the present invention, downwardly extending loading rods are provided at both ends of the loading transverse axis; one end of the loading rod is connected to the loading transverse axis, and the other end abuts against the loading ring.

[0007] In one or more embodiments of the present invention, a protrusion is provided at one end of the loading rod abutting against the loading ring; a matching groove is provided on the loading ring, and the matching groove is configured to accommodate the protrusion and tightly fit with the protrusion.

[0008] In one or more embodiments of the present invention, the loading pulley comprises: a pulley body, an annular member, and an extension. The annular member is detachably disposed at both ends of the pulley body and is interference-fitted with the pulley body; the annular member and the pulley body form the accommodating space; the extension is connected to the annular member and extends axially away from the pulley body; and the loading bearing is sleeved on the extension.

[0009] In one or more embodiments of the present invention, an oil drain tank is provided on a side of the support base close to the loading pulley, and both ends of the loading pulley are at least partially accommodated in the oil drain tank.

[0010] In one or more embodiments of the present invention, an oil outlet gap is defined between the extension portion and the oil supply shaft, one end of the oil outlet gap is communicated with the accommodating space, and the other end of the oil outlet gap is communicated with the oil drain tank.

[0011] In one or more embodiments of the present invention, a plurality of oil drain holes are axially opened on the annular member at positions corresponding to the loading bearings, and the oil drain holes are connected to the accommodating space and the oil drain tank.

[0012] In one or more embodiments of the present invention, the support base includes an upper support portion and a lower support portion that are detachably connected; and / or, the oil drain tank includes an upper oil tank and a lower oil tank that are detachably connected.

[0013] In one or more embodiments of the present invention, an oil supply cavity is axially defined in the oil supply shaft; an oil supply hole is radially defined in the oil supply shaft, and the oil supply hole connects the oil supply cavity and the accommodating space.

[0014] In one or more embodiments of the present invention, a limit torque rod is provided on one side of the base in the vertical direction, one end of the limit torque rod is fixedly connected to the oil supply shaft, and the other end is clamped between two force sensors.

[0015] Compared to existing technologies, the sliding bearing test structure of this utility model coaxially arranges the loading bearing and the loading pulley. Pressure is applied to the loading bearing via a loading ring, rather than directly via the loading shaft as in existing technologies. This allows the loading bearing to maintain a high rotational speed while also applying more uniform force. The loading bearing also avoids collisions with the loading pulley, which could produce unusual noises. Furthermore, multiple oil drain holes are provided in the ring corresponding to the locations of the loaded bearings to provide lubrication to the loading bearing, extending its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are only some of the embodiments described in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without inventive efforts.

[0017] Figure 1 A three-dimensional diagram of a high-speed and heavy-load sliding bearing test structure in one embodiment of the present invention;

[0018] Figure 2 A side view of a high-speed and heavy-load sliding bearing test structure in one embodiment of the present invention;

[0019] Figure 3 for Figure 2 Sectional view along the AA axis;

[0020] Figure 4 for Figure 3 Magnified view of area A in the middle.

[0021] Description of main reference numerals:

[0022] 1-base, 11-base plate, 12-support seat, 121-upper support part, 122-lower support part, 2-oil supply shaft, 21-oil supply chamber, 22-oil supply hole, 23-rolling bearing, 24-connecting flange, 3-loading pulley, 31-pulley body, 311-tooth part, 32-ring part, 321-oil drain hole, 33-extension part, 331-oil outlet interval, 4-accommodation space, 5-loading bearing, 6-loading ring, 61-matching groove, 7-loading horizontal axis, 71-loading rod, 711-protrusion, 8-oil drain tank, 81-upper oil tank, 82-lower oil tank, 9-limit torque measuring rod, 91-force sensor, a-sliding bearing. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the following will provide a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only a portion of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work should fall within the scope of protection of the present invention.

[0024] like Figure 1-4 As shown, a high-speed, heavy-load sliding bearing test structure in one embodiment of the present invention comprises: a base 1, an oil supply shaft 2, a loading pulley 3, a loading bearing 5, a loading ring 6, and a loading cross shaft 7. The base 1 comprises a base plate 11 and two support seats 12 extending upward from the base plate 11 and spaced apart. The oil supply shaft 2 is horizontally mounted on the base 1, with its ends inserted and fixed within the two support seats 12. For example, a rolling bearing 23 and a connecting flange 24 may be provided between the oil supply shaft 2 and the support seats 12 to facilitate connection. The loading pulley 3 is sleeved on the oil supply shaft 2 and can rotate relative to the oil supply shaft 2. A receiving space 4 is formed between the loading pulley 3 and the oil supply shaft 2 for accommodating the sliding bearing a to be tested. The receiving space 4 is connected to the oil supply shaft 2. Lubricating oil can be supplied to the oil supply shaft 2 via an external oil supply device, and then from the oil supply shaft 2 to the receiving space 4. The loading bearing 5 is coaxially mounted with the loading pulley 3 and sleeved on both ends of the loading pulley 3. The loading ring 6 is sleeved on the loading bearing 5 and fixed relative to the loading bearing 5. The loading horizontal shaft 7 is horizontally arranged at the upper end of the support seat 12 and abuts against the loading ring 6 for applying load to the loading ring 6 in the vertical direction.

[0025] The working principle of the sliding bearing test structure is as follows: the sliding bearing a to be tested is sleeved on the oil supply shaft 2 and fixed relative to the oil supply shaft 2. The loading pulley 3 is sleeved on the sliding bearing a. The loading bearing 5 is set at both ends of the loading pulley 3 and can rotate with the loading pulley 3. The loading ring 6 is sleeved on the loading bearing 5. The loading cross bar is against the loading ring 6. During the test, the loading cross shaft 7 is subjected to downward pressure under the action of the external pressure device. The loading cross bar transfers the pressure to the loading ring 6. After being pressurized, the loading ring 6 squeezes the loading bearing 5. The loading bearing 5 finally transfers the pressure to the loading pulley 3. After being pressurized, the loading pulley 3 forms a friction pair with the sliding bearing a, and the rotation speed and pressure of the loading pulley 3 can be adjusted to simulate the actual working conditions of the sliding bearing a.

[0026] In the above embodiment, the sliding bearing test structure of the present invention coaxially arranges the loading bearing 5 and the loading pulley 3, and applies pressure to the loading bearing 5 via the loading ring 6. This allows the loading bearing 5 to maintain a high rotational speed while also receiving a more uniform force. The loading bearing 5 will not collide with the loading pulley 3, thereby preventing abnormal noise.

[0027] In one embodiment, if Figure 3 As shown, loading rods 71 ​​extending downward are provided at both ends of the loading shaft 7. One end of the loading rod 71 is connected to the loading shaft 7, and the other end abuts the loading ring 6. For example, one end of the loading rod 71 is fixedly connected to the loading shaft 7 by screws. The other end abuts the loading ring 6 detachably to facilitate replacement of the sliding bearing a to be tested.

[0028] Furthermore, a protrusion 711 is provided on one end of the loading rod 71 that abuts the loading ring 6. A mating groove 61 is provided at a corresponding position on the loading ring 6. The mating groove 61 is configured to accommodate the protrusion 711 and tightly mate with it, thereby maintaining a consistent direction of pressure transmission and providing a more even pressure distribution on the loading pulley 3.

[0029] In one embodiment, the loading pulley 3 includes a pulley body 31 , an annular member 32 and an extension portion 33 .

[0030] The surface of the pulley body 31 may be provided with a tooth portion 311 so that the pulley can be driven by a transmission belt. The loading pulley 3 rotates relative to the sliding bearing a under the drive of the transmission belt.

[0031] An annular member 32 is removably mounted on each end of the pulley body 31 and forms an interference fit therewith. An accommodating space 4 is formed between the annular member 32 and the pulley body 31. When the sliding bearing a is mounted on the oil supply shaft 2, the annular member 32 and the pulley body 31 enclose the sliding bearing a within the accommodating space 4. An extension 33 is connected to the annular member 32 and extends axially away from the pulley body 31.

[0032] The loading bearing 5 is sleeved on the extension portion 33 and tightly fitted therewith, thereby being able to rotate synchronously with the extension portion 33. The specific configuration of the loading bearing 5 can be: the loading bearing 5 can be a ball bearing having an inner ring and an outer ring. The ball bearing is prior art and will not be described in detail here. One side of the inner ring of the loading bearing 5 can be limited by a shoulder on the extension portion 33, and the other side can be limited by a retaining spring. A loading ring 6 is mounted on the outer ring of the loading bearing 5. The entire loading ring 6 can serve as a bearing seat to encase the loading bearing 5. The loading ring 6 can be provided with a protruding portion to serve as a limiter for the outer ring of the ball bearing.

[0033] In one embodiment, an oil supply chamber 21 is axially defined within the oil supply shaft 2. Oil supply holes 22 are radially defined within the oil supply shaft 2, connecting the oil supply chamber 21 with the accommodating space 4. An external oil supply mechanism communicates with the oil supply chamber 21, delivering lubricating oil into the chamber. The lubricating oil is then delivered through the oil supply holes 22 into the accommodating space 4 to lubricate the loading pulley 3 and the sliding bearing a.

[0034] In the working state, the oil supply shaft 2 will continuously deliver lubricating oil to the sliding bearing a. Since there are gaps between the loading pulley 3, the annular member 32, the extension 33 and the sliding bearing a, the oil will flow out from these gaps. Figure 1 As shown, in order to prevent the oil from spilling, a drain tank 8 is provided on one side of the support base 12 close to the loading pulley 3, and both ends of the loading pulley 3 are at least partially accommodated in the drain tank 8. In this way, the discharged oil can be collected in the drain tank 8 without splashing everywhere.

[0035] The specific configuration of the drain tank 8 can be as follows: the support base 12 includes a detachably connected upper support portion 121 and a lower support portion 122. The drain tank 8 includes a detachably connected upper tank 81 and a lower tank 82. The lower drain tank 8 is connected to the lower support portion 122, and through-holes are machined on the lower side surfaces of the lower drain tanks 8 on both sides to facilitate the return of lubricating oil to the external oil supply mechanism. The upper drain tank 8 is connected to the upper support portion 121 and mates with the lower drain tank 8. The connection surface is coated with high-temperature resistant sealant to prevent oil leakage. The upper end surface of the upper drain tank 8 is opened to facilitate the passage of the loading rod 71.

[0036] In one embodiment, if Figure 4 As shown, there is an oil outlet gap 331 between the extension portion 33 and the oil supply shaft 2, one end of the oil outlet gap 331 is connected to the accommodating space 4, and the other end is connected to the oil drain tank 8. Used lubricating oil can be discharged into the oil drain tank 8 through the oil outlet gap 331.

[0037] Furthermore, the annular member 32 is provided with a plurality of oil drain holes 321 along its circumference, corresponding to the positions of the loading bearing 5. These holes 321 connect the accommodating space 4 with the oil drain tank 8. Directly facing the loading bearing 5, these holes allow some lubricating oil to be discharged directly to the loading bearing 5, thereby lubricating it. This eliminates the need for additional maintenance on the loading bearing 5.

[0038] In one embodiment, a limit torque measuring rod 9 is provided on one side of the base 1 along the vertical direction. One end of the limit torque measuring rod 9 is fixedly connected to the oil supply shaft 2 , and the other end is clamped between two force sensors 91 .

[0039] Specifically, a slot is formed on one side of the oil supply shaft 2, into which one end of a torque-limiting rod 9 is mounted. This slot limits the axial rotation of the oil supply shaft 2 and the sliding bearing a. This allows the loading pulley 3 to rotate while the sliding bearing a remains stationary, more realistically reproducing the operating conditions of the planetary gear bearings. A force sensor 91 detects the slightest rotation of the torque-limiting rod 9, converting it into friction between the loading pulley 3 and the sliding bearing a and outputting it, thereby obtaining more accurate test data.

[0040] In summary, the sliding bearing test structure of the present invention coaxially arranges the loading bearing 5 and the loading pulley 3, and applies pressure to the loading bearing 5 through the loading ring 6 rather than directly applying pressure to the loading bearing 5 through the loading horizontal axis as in the prior art. This allows the loading bearing 5 to maintain a high speed while also being subjected to a more uniform force. The loading bearing 5 will not collide with the loading pulley 3 and produce abnormal noise. In addition, the annular member 32 is provided with multiple oil drain holes 321 corresponding to the position of the loaded bearing 5 to provide lubricating oil to the loading bearing 5, thereby extending the service life of the loading bearing 5.

[0041] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0042] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A high-speed and heavy-load sliding bearing test structure, characterized in that: include: The base comprises a base plate and two support bases extending upward from the base plate and spaced apart from each other; An oil supply shaft is horizontally arranged on the base, and both ends of the oil supply shaft are respectively inserted into and fixed in the two support seats; a loading pulley, sleeved on the oil supply shaft and capable of rotating relative to the oil supply shaft; a receiving space is formed between the loading pulley and the oil supply shaft for receiving the sliding bearing to be tested; the receiving space is communicated with the oil supply shaft; A loading bearing is coaxially arranged with the loading pulley and sleeved on both ends of the loading pulley; a loading ring, sleeved on the loading bearing and fixed relative to the loading bearing; and The loading horizontal axis is horizontally arranged at the upper end of the support seat and abuts against the loading ring, and is used to apply a load to the loading ring in a vertical direction.

2. The high-speed and heavy-load sliding bearing test structure according to claim 1, characterized in that: Loading rods extending downward are provided at both ends of the loading horizontal axis; one end of the loading rod is connected to the loading horizontal axis, and the other end is in contact with the loading ring.

3. The high-speed and heavy-load sliding bearing test structure according to claim 2, characterized in that: A protrusion is provided at one end of the loading rod that abuts against the loading ring; a matching groove is provided on the loading ring, and the matching groove is configured to accommodate the protrusion and tightly mate with the protrusion.

4. The high-speed and heavy-load sliding bearing test structure according to claim 1, characterized in that: The loading pulley comprises: Pulley body; an annular member, detachably provided at both ends of the pulley body and interference-fitted with the pulley body; the accommodating space is formed between the annular member and the pulley body; and The extension portion is connected to the annular member and extends axially in a direction away from the pulley body; the loading bearing is sleeved on the extension portion.

5. The high-speed and heavy-load sliding bearing test structure according to claim 4, characterized in that: An oil drain tank is provided on one side of the support seat close to the loading pulley, and both ends of the loading pulley are at least partially accommodated in the oil drain tank.

6. The high-speed and heavy-load sliding bearing test structure according to claim 5, characterized in that: An oil outlet gap is defined between the extension portion and the oil supply shaft. One end of the oil outlet gap is communicated with the accommodating space, and the other end thereof is communicated with the oil drain tank.

7. The high-speed and heavy-load sliding bearing test structure according to claim 5, characterized in that: The annular member is provided with a plurality of oil drain holes along the axial direction at positions corresponding to the loading bearings, and the oil drain holes are connected to the accommodating space and the oil drain tank.

8. The high-speed and heavy-load sliding bearing test structure according to claim 5, characterized in that: The support seat includes an upper support portion and a lower support portion that are detachably connected; and / or the oil drain tank includes an upper oil tank and a lower oil tank that are detachably connected.

9. The high-speed and heavy-load sliding bearing test structure according to claim 1, characterized in that: An oil supply cavity is axially provided in the oil supply shaft; an oil supply hole is radially provided in the oil supply shaft, and the oil supply hole communicates with the oil supply cavity and the accommodating space.

10. The high-speed and heavy-load sliding bearing test structure according to claim 1, characterized in that: A limit moment measuring rod is provided on one side of the base in the vertical direction. One end of the limit moment measuring rod is fixedly connected to the oil supply shaft, and the other end is clamped between two force measuring sensors.

Images