CN216645851U - Triaxial loading fatigue test device of elastic rod end bearing - Google Patents
Triaxial loading fatigue test device of elastic rod end bearing Download PDFInfo
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- CN216645851U CN216645851U CN202122887565.4U CN202122887565U CN216645851U CN 216645851 U CN216645851 U CN 216645851U CN 202122887565 U CN202122887565 U CN 202122887565U CN 216645851 U CN216645851 U CN 216645851U
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Abstract
The utility model provides a triaxial loading fatigue test device of an elastic rod end bearing, which comprises: the self-aligning roller bearing comprises a base plate supporting base, an upper cover plate, a Z-axis torsion fork lug connecting bolt, a Z-axis torsion self-aligning roller bearing, a rotating frame assembly and a Y-axis torsion loading bolt; the upper cover plate and the bottom plate support base form a loading frame; the elastic rod end bearing serving as a loading test piece is arranged in the loading frame through loading shafts at the upper end and the lower end of the rotating frame assembly, a Z-axis torsion fork lug connecting bolt used for applying Z-axis torsion load is connected to the top end loading shaft of the rotating frame assembly, and the elastic rod end bearing is connected with a Y-axis torsion loading bolt used for applying Y-axis torsion load through the rotating frame assembly. The technical scheme of the utility model solves the problem that the existing joint bearing loading test can not realize the triaxial loading working condition of simultaneously applying axial force along the X axis, torsion around the Y axis and torsion around the Z axis.
Description
Technical Field
The utility model relates to the technical field of helicopter fatigue tests, in particular to a triaxial loading fatigue test device for an elastic rod end bearing.
Background
Bearings used in helicopter technology are subjected to rotational and force loads in multiple directions during actual use.
In order to examine the service life of the bearing, the bearing is usually applied with rotation loads and force loads in multiple directions at the same time. The three-way loading test method of the joint bearing disclosed at present comprises the following steps: a three-way loading test device for a joint bearing can simultaneously apply axial force along an X axis, torsion around the X axis and torsion around a Y axis to the joint bearing, and is suitable for loading under double-shaft multi-load working conditions; however, the proposed method in the above-mentioned known device cannot meet the three-axis loading requirement for the three-axis loading condition requiring simultaneous application of axial force along the X-axis, torsion around the Y-axis, and torsion around the Z-axis.
SUMMERY OF THE UTILITY MODEL
The purpose of the utility model is: the utility model provides a triaxial loading fatigue test device for an elastic rod end bearing, which aims to solve the problem that the existing joint bearing loading test cannot realize a triaxial loading working condition of simultaneously applying axial force along an X axis, torsion around a Y axis and torsion around a Z axis.
The technical scheme of the utility model is as follows: the utility model provides a triaxial loading fatigue test device of an elastic rod end bearing, which comprises: the device comprises a base plate supporting base 1, an upper cover plate 2, a cover plate fixing bolt 3, a Z-axis torsion fork lug 4, a Z-axis torsion fork lug connecting bolt 5, a Z-axis torsion self-aligning roller bearing 6, a rotating frame assembly 8 and a Y-axis torsion loading bolt 10;
The upper cover plate 2 is erected on the bottom plate supporting base 1 in parallel through two side plates and is fixedly connected through a cover plate fixing bolt 3 to form a loading frame, and a bearing hole is formed in the middle corresponding position of the upper cover plate 2 and the bottom plate supporting base 1;
an elastic rod end bearing 7 serving as a loading test piece is arranged in a loading frame through loading shafts at the upper end and the lower end of a rotating frame assembly 8, a top loading shaft of the rotating frame assembly 8 is arranged in a bearing hole of an upper cover plate 2 through a Z-axis torsion self-aligning roller bearing 6, the top loading shaft extends out of a top bearing hole and is connected with a Z-axis torsion fork lug connecting bolt 5 for applying Z-axis torsion load through a Z-axis torsion fork lug 4, and a bottom loading shaft of the top loading shaft is arranged in a bearing hole of a bottom plate supporting base 1 through the Z-axis torsion self-aligning roller bearing 6, so that the rotating frame assembly 8 drives the elastic rod end bearing 7 to rotate in the loading frame;
the resilient rod end bearing 7 is connected in the Y-axis to a Y-axis torsional loading bolt 10 for application by a rotating frame assembly 8.
Alternatively, in a triaxial loading fatigue test apparatus for an elastomeric rod end bearing as described above,
the triaxial loading fatigue test device of the elastic rod end bearing applies X-direction axial force in the following modes: an X-axis axial force is applied directly to the elastic rod end bearing 7 along the X-axis.
Alternatively, in a triaxial loading fatigue test apparatus for an elastomeric rod end bearing as described above,
the rotating frame assembly 8 includes: a Z-axis torsion upper loading shaft 8a, a torsion frame 8b, a loading shaft fixing nut 8c and a Z-axis torsion lower loading shaft 8 h;
the bottom end of the Z-axis torsion upper loading shaft 8a is fixedly arranged in the middle of the top end of the torsion frame 8b through a loading shaft fixing nut 8c, and the top end of the Z-axis torsion lower loading shaft 8h is fixedly arranged in the middle of the bottom end of the torsion frame 8b through a loading shaft fixing nut 8 c;
the top end of the Z-axis torsion upper loading shaft 8a is arranged in a bearing hole in the middle of the cover plate 2 through a Z-axis torsion self-aligning roller bearing 6, and the top end of the Z-axis torsion upper loading shaft 8a is connected with the Z-axis torsion fork lug 4 through a Z-axis torsion fork lug connecting bolt 5; the bottom end of the Z-axis torsion lower loading shaft 8h is mounted in a bearing hole in the middle of the bottom plate supporting base 1 through another Z-axis torsion aligning roller bearing 6, so that the whole rotating frame assembly 8 can rotate in a loading frame formed by the upper cover plate 2 and the bottom plate supporting base 1.
Optionally, in the triaxial loading fatigue testing apparatus for an elastic rod end bearing as described above, the rotating frame assembly 8 further includes: the Y-axis torsion fork lug connecting bolt 8d, the Y-axis torsion fork lug 8e, the bearing shaft 8f, the bearing pin shaft 8g, the test piece fixing nut 8i and the Y-axis torsion self-aligning roller bearing 8 j;
The corresponding positions of the frame plates on the two sides of the torsion frame 8b are respectively provided with a Y-axis torsion self-aligning roller bearing 8j, the outer ends of 2 bearing shafts 8f penetrate through the Y-axis torsion self-aligning roller bearing 8j to be connected with the opposite side frame plates in the torsion frame 8b, the inner ends of the bearing shafts are connected with a Y-axis torsion fork lug 8e and a bearing pin shaft 8g through a Y-axis torsion fork lug connecting bolt 8d, and the bearing pin shaft 8g and the elastic rod end bearing 7 are fixed together through a test piece fixing nut 8 i.
Alternatively, in a triaxial loading fatigue test apparatus for an elastomeric rod end bearing as described above,
the three-axis loading fatigue test device applies a torsion load around the Y axis in the following manner: by applying a force in the Z-axis direction to the Y-axis torsion loading bolt 10, the Y-axis torsion yoke 8e drives the elastic rod end bearing 7 to rotate around the Y-axis.
Alternatively, in a triaxial loading fatigue test apparatus for an elastomeric rod end bearing as described above,
the three-axis loading fatigue test device applies a torsion load applying mode around a Z axis: the entire rotating frame assembly 8 is rotated about the Z-axis by applying a force in the Y-axis direction to the Z-axis torsion loading bolt 9.
The utility model has the beneficial technical effects that:
according to the triaxial loading fatigue test device for the elastic rod end bearing, provided by the utility model, X-direction axial force is directly applied to the elastic rod end bearing 7 along an X axis; the torsion load around the Y axis applies a force in the Z axis direction to the Y axis torsion loading bolt 10 to enable the Y axis torsion fork 8e to drive the elastic rod end bearing 7 to rotate around the Y axis; the torsional load about the Z-axis causes the entire rotating frame assembly 8 to rotate about the Z-axis by applying a force in the Y-axis direction to the Z-axis torsional loading bolt 9. By adopting the triaxial loading fatigue test device provided by the embodiment of the utility model, the problem of complex space loading of a test bed which simultaneously applies axial force along an X axis, torsion around a Y axis and torsion load around a Z axis is solved, and the triaxial loading fatigue test requirement of the elastic rod end bearing is met.
Drawings
The accompanying drawings are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the example serve to explain the principles of the utility model and not to limit the utility model.
FIG. 1 is a schematic structural view of a triaxial loading fatigue test apparatus for an elastic rod end bearing according to an embodiment of the present disclosure;
FIG. 2 is a schematic structural view of another perspective of a triaxial loading fatigue test apparatus for an elastic rod end bearing provided in the embodiment shown in FIG. 1;
FIG. 3 is a schematic view of a rotating frame assembly according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of the embodiment of FIG. 3 providing an alternate perspective of the rotating frame assembly.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.
It has been described in the above background art that the conventional knuckle bearing loading test can simultaneously apply an axial force along the X axis, a torsion around the X axis and a torsion around the Y axis to the knuckle bearing, and is suitable for loading in a biaxial multi-load condition. However, for the three-axis loading condition that needs to apply the axial force along the X-axis, the torsion around the Y-axis and the torsion around the Z-axis at the same time, the proposed method in the above-mentioned disclosed device cannot achieve the three-axis loading requirement.
Aiming at the problems of the existing joint bearing loading test device, the embodiment of the utility model provides a triaxial loading fatigue test device of an elastic rod end bearing, so as to meet the triaxial loading test requirement of the joint bearing.
The following specific embodiments of the present invention may be combined, and the same or similar concepts or processes may not be described in detail in some embodiments.
FIG. 1 is a schematic structural view of a triaxial loading fatigue test apparatus for an elastic rod end bearing according to an embodiment of the present invention, and FIG. 2 is a schematic structural view of another perspective of the triaxial loading fatigue test apparatus for an elastic rod end bearing according to the embodiment of FIG. 1. The basic structure of the triaxial loading fatigue test apparatus for the elastic rod end bearing provided by the embodiment of the present invention may include: the self-aligning roller bearing comprises a base plate supporting base 1, an upper cover plate 2, a cover plate fixing bolt 3, a Z-axis torsion fork lug 4, a Z-axis torsion fork lug connecting bolt 5, a Z-axis torsion aligning roller bearing 6, a rotating frame assembly 8 and a Y-axis torsion loading bolt 10.
As shown in fig. 1 and 2, in the structure of the triaxial loading fatigue test apparatus, an upper cover plate 2 is erected on a bottom plate support base 1 through two side plates in parallel, and is fixedly connected through a cover plate fixing bolt 3 to form a loading frame, and a bearing hole is arranged at a corresponding position between the upper cover plate 2 and the bottom plate support base 1.
In the embodiment of the utility model, an elastic rod end bearing 7 serving as a loading test piece is specifically installed in a rotating frame assembly 8, specifically, the elastic rod end bearing is installed in a loading frame through loading shafts at the upper end and the lower end of the rotating frame assembly 8, a top loading shaft of the rotating frame assembly 8 is installed in a bearing hole of an upper cover plate 2 through a Z-axis torsion self-aligning roller bearing 6, the top loading shaft extends out of a top bearing hole and is connected with a Z-axis torsion fork lug connecting bolt 5 for applying Z-axis torsion load through a Z-axis torsion fork lug 4, and a bottom loading shaft of the top loading shaft is installed in a bearing hole of a bottom plate supporting base 1 through the Z-axis torsion self-aligning roller bearing 6, so that the rotating frame assembly 8 drives the elastic rod end bearing 7 to rotate in the loading frame.
In an embodiment of the present invention, the resilient rod end bearing 7 is coupled to a Y-axis torsion load bolt 10 for application via a rotating frame assembly 8 in the Y-axis.
It should be noted that the manner in which the triaxial loading fatigue test apparatus for the elastic rod end bearing according to the embodiment of the present invention applies the axial force in the X direction is as follows: an X-axis axial force is applied directly along the X-axis on the elastic rod end bearing 7.
Fig. 3 is a schematic structural view of a rotating frame assembly according to an embodiment of the present invention, and fig. 4 is a schematic structural view of another perspective view of the rotating frame assembly according to the embodiment of fig. 3. Referring to fig. 3 and 4, the rotating frame assembly 8 further includes: the test device comprises a Z-axis torsion upper loading shaft 8a, a torsion frame 8b, a loading shaft fixing nut 8c, a Y-axis torsion fork lug connecting bolt 8d, a Y-axis torsion fork lug 8e, a bearing shaft 8f, a bearing pin shaft 8g, a Z-axis torsion lower loading shaft 8h, a test piece fixing nut 8i and a Y-axis torsion self-aligning roller bearing 8 j.
The triaxial loading fatigue test device of the elastic rod end bearing 7 can realize the function of simultaneously applying axial force along the X axis, torsion around the Y axis and torsion around the Z axis to the elastic rod end bearing. The specific implementation mode is as follows:
two side plates of a bottom plate supporting base 1 are connected with an upper cover plate 2 through cover plate fixing bolts 3, bearing holes are formed in corresponding positions of the centers of the bottom plate supporting base 1 and the upper cover plate 2, a Z-axis torsion self-aligning roller bearing 6 is installed in each bearing hole, a Z-axis torsion upper loading shaft 8a penetrates through the Z-axis torsion self-aligning roller bearing 6 of the upper cover plate 2, the top end of the Z-axis torsion upper loading shaft 8a is connected with a Z-axis torsion fork lug 4 through a Z-axis torsion fork lug connecting bolt 5, and the bottom end of the Z-axis torsion upper loading shaft is fixedly connected to a top frame plate of a torsion frame 8b and is fixed through a loading shaft fixing nut 8 c; the bottom end of a Z-axis torsion lower loading shaft 8h penetrates through the Z-axis torsion self-aligning roller bearing 6 on the bottom plate supporting base 1, and the top end of the Z-axis torsion lower loading shaft 8h is fixedly connected to a bottom frame plate of the torsion frame 8b through a loading shaft fixing nut 8 c.
A Y-axis torsion self-aligning roller bearing 8j is respectively arranged at the corresponding position of two side frame plates of a torsion frame 8b in the rotating frame assembly 8, the outer ends of 2 bearing shafts 8f penetrate through the Y-axis torsion self-aligning roller bearing 8j to be connected with the opposite side frame plates in the torsion frame 8b, and the inner ends are connected with a Y-axis torsion fork lug 8e and a bearing pin shaft 8g through a Y-axis torsion fork lug connecting bolt 8 d. The bearing pin shaft 8g and the elastic rod end bearing 7 are fixed together by a test piece fixing nut 8 i.
The triaxial loading fatigue test device for the elastic rod end bearing provided by the embodiment of the utility model can realize triaxial loading, and specifically comprises the following components: axial force on the X-axis, torsion around the Y-axis, and torsion around the Z-axis. The following describes the specific implementation of the triaxial loading:
(1) loading X-direction axial force: directly along the X-axis, either the + X axis or the-X axis of axial force may be applied to the elastomeric rod end bearing 7;
(2) torsion load about the Y-axis is applied: the Y-axis torsion fork 8e drives the elastic rod end bearing 7 to rotate around the Y axis by applying a force in the Z axis direction to the Y-axis torsion loading bolt 10; note that the torsional load of either the + Z axis or the-Z axis can be used;
(3) application of torsional load about the Z-axis: the whole rotating frame assembly 8 rotates around the Z axis by applying force in the Y axis direction to the Z axis torsion loading bolt 9; it should be noted that the + Y axis or-Y axis may be a torsional load.
According to the triaxial loading fatigue test device for the elastic rod end bearing, provided by the embodiment of the utility model, the X-direction axial force is directly applied to the elastic rod end bearing 7 along the X axis; the torsion load around the Y axis applies a force in the Z axis direction to the Y axis torsion loading bolt 10 to enable the Y axis torsion fork 8e to drive the elastic rod end bearing 7 to rotate around the Y axis; the torsional load about the Z-axis causes the entire rotating frame assembly 8 to rotate about the Z-axis by applying a force in the Y-axis direction to the Z-axis torsional loading bolt 9. By adopting the triaxial loading fatigue test device provided by the embodiment of the utility model, the problem of complex space loading of a test bed which simultaneously applies axial force along an X axis, torsion around a Y axis and torsion load around a Z axis is solved, and the triaxial loading fatigue test requirement of the elastic rod end bearing is met.
Although the embodiments of the present invention have been described above, the present invention is not limited to the embodiments described above. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the utility model as defined by the appended claims.
Claims (6)
1. The utility model provides a triaxial loading fatigue test device of elasticity rod end bearing which characterized in that includes: the self-aligning roller bearing comprises a base plate supporting base (1), an upper cover plate (2), a cover plate fixing bolt (3), a Z-axis torsion fork lug (4), a Z-axis torsion fork lug connecting bolt (5), a Z-axis torsion self-aligning roller bearing (6), a rotating frame assembly (8) and a Y-axis torsion loading bolt (10);
the upper cover plate (2) is erected on the bottom plate supporting base (1) in parallel through two side plates and is fixedly connected through a cover plate fixing bolt (3) to form a loading frame, and bearing holes are formed in corresponding positions between the upper cover plate (2) and the bottom plate supporting base (1);
an elastic rod end bearing (7) serving as a loading test piece is installed in a loading frame through loading shafts at the upper end and the lower end of a rotating frame assembly (8), the top loading shaft of the rotating frame assembly (8) is installed in a bearing hole of an upper cover plate (2) through a Z-axis torsion self-aligning roller bearing (6), the top loading shaft extends out of a top bearing hole and is connected with a Z-axis torsion fork lug connecting bolt (5) used for applying Z-axis torsion load through a Z-axis torsion fork lug (4), and the bottom loading shaft of the elastic rod end bearing is installed in a bearing hole of a bottom plate supporting base (1) through the Z-axis torsion self-aligning roller bearing (6), so that the rotating frame assembly (8) drives the elastic rod end bearing (7) to rotate in the loading frame;
The elastic rod end bearing (7) is connected with a Y-axis torsion loading bolt (10) for applying through a rotating frame assembly (8) on a Y axis.
2. The three-axis loading fatigue test apparatus of an elastic rod end bearing of claim 1,
the triaxial loading fatigue test device of the elastic rod end bearing applies X-direction axial force in the following modes: the axial force in the X-axis direction is directly applied to the elastic rod end bearing (7).
3. The three-axis loading fatigue test apparatus of an elastic rod end bearing of claim 1,
the rotating frame assembly (8) comprises: a Z-axis torsion upper loading shaft (8a), a torsion frame (8b), a loading shaft fixing nut (8c) and a Z-axis torsion lower loading shaft (8 h);
the bottom end of the Z-axis torsion upper loading shaft (8a) is fixedly installed in the middle of the top end of the torsion frame (8b) through a loading shaft fixing nut (8c), and the top end of the Z-axis torsion lower loading shaft (8h) is fixedly installed in the middle of the bottom end of the torsion frame (8b) through a loading shaft fixing nut (8 c);
the top end of the Z-axis torsion upper loading shaft (8a) is arranged in a bearing hole in the middle of the cover plate (2) through a Z-axis torsion self-aligning roller bearing (6), and the top end of the Z-axis torsion upper loading shaft (8a) is connected with the Z-axis torsion fork lug (4) through a Z-axis torsion fork lug connecting bolt (5); the bottom end of the Z-axis torsion lower loading shaft (8h) is arranged in a bearing hole in the middle of the bottom plate supporting base (1) through another Z-axis torsion aligning roller bearing (6), so that the whole rotating frame assembly (8) can rotate in a loading frame formed by the upper cover plate (2) and the bottom plate supporting base (1).
4. The triaxial loading fatigue test apparatus of an elastomeric rod end bearing according to claim 3, wherein the rotating frame assembly (8) further comprises: the device comprises a Y-axis torsion fork lug connecting bolt (8d), a Y-axis torsion fork lug (8e), a bearing shaft (8f), a bearing pin shaft (8g), a test piece fixing nut (8i) and a Y-axis torsion self-aligning roller bearing (8 j);
the corresponding positions of frame plates on two sides of a torsion frame (8b) are respectively provided with a Y-axis torsion self-aligning roller bearing (8j), the outer ends of 2 bearing shafts (8f) penetrate through the Y-axis torsion self-aligning roller bearing (8j) to be connected with the opposite side frame plates in the torsion frame (8b), the inner ends of the 2 bearing shafts are connected with a Y-axis torsion fork lug (8e) and a bearing pin shaft (8g) through a Y-axis torsion fork lug connecting bolt (8d), and the bearing pin shaft (8g) and an elastic rod end bearing (7) are fixed together through a test piece fixing nut (8 i).
5. The triaxial loading fatigue test apparatus of an elastic rod end bearing according to any one of claims 1 to 4, wherein,
the three-axis loading fatigue test device applies a torsion load around the Y axis in the following manner: force in the Z-axis direction is applied to the Y-axis torsion loading bolt (10), so that the Y-axis torsion fork lug (8e) drives the elastic rod end bearing (7) to rotate around the Y axis.
6. The triaxial loading fatigue test apparatus of an elastic rod end bearing according to any one of claims 1 to 4, wherein,
the three-axis loading fatigue test device applies a torsion load around a Z axis in the following manner:
the whole rotating frame assembly (8) rotates around the Z axis by applying force in the Y axis direction to the Z axis torsion loading bolt (9).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122887565.4U CN216645851U (en) | 2021-11-23 | 2021-11-23 | Triaxial loading fatigue test device of elastic rod end bearing |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122887565.4U CN216645851U (en) | 2021-11-23 | 2021-11-23 | Triaxial loading fatigue test device of elastic rod end bearing |
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| CN216645851U true CN216645851U (en) | 2022-05-31 |
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| CN202122887565.4U Active CN216645851U (en) | 2021-11-23 | 2021-11-23 | Triaxial loading fatigue test device of elastic rod end bearing |
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