CN106644482B - Load loading device and method - Google Patents
Load loading device and method Download PDFInfo
- Publication number
- CN106644482B CN106644482B CN201611265008.6A CN201611265008A CN106644482B CN 106644482 B CN106644482 B CN 106644482B CN 201611265008 A CN201611265008 A CN 201611265008A CN 106644482 B CN106644482 B CN 106644482B
- Authority
- CN
- China
- Prior art keywords
- support
- test piece
- ring segment
- mounting hole
- load
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000011068 loading method Methods 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title description 10
- 238000012360 testing method Methods 0.000 claims abstract description 143
- 238000001514 detection method Methods 0.000 claims description 3
- 230000009471 action Effects 0.000 claims description 2
- 238000009434 installation Methods 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 9
- 229910000831 Steel Inorganic materials 0.000 description 7
- 238000010586 diagram Methods 0.000 description 7
- 239000010959 steel Substances 0.000 description 7
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000009661 fatigue test Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/04—Bearings
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a load loading device and a load loading method, which can be used for carrying out load loading test on the inner edge or the outer edge of an installation hole on the end surface of a ring segment test piece. The load loading device comprises a base, a first support, a second support and a pressure head assembly. The base is provided with a supporting surface; the first support and the second support are both provided with circumferential supporting surfaces and arranged on the supporting surfaces, and a preset distance is reserved between the first support and the second support; the pressure head assembly at least comprises a pressure head; when the load loading device is used, the pressure head assembly is arranged on the upper surface of the ring segment test piece, the first support and the second support the lower surface of the ring segment test piece, and the pressure head assembly applies a test load to the ring segment test piece.
Description
Technical Field
The invention belongs to the technical field of load testing, and particularly relates to a load loading device and method.
Background
A variable pitch bearing for a wind generating set is a large-scale component and mainly comprises an annular inner ring, an outer ring and a roller between the annular inner ring and the outer ring. The outer edge and the inner edge of the mounting hole of the outer ring of the variable-pitch bearing are subjected to circumferential tension in the using process, the fatigue cracking phenomenon of the mounting hole can occur, and the whole bearing fails. The method has important significance in testing the loading condition of the mounting hole and evaluating the relationship between the service life and the fatigue load.
Disclosure of Invention
The embodiment of the invention provides a load loading device and a load loading method, which can load the load on the inner edge or the outer edge of an installation hole on the end surface of an annular component and realize fatigue test.
In a first aspect, a load loading apparatus is provided that includes a base, a first support, a second support, and a ram assembly. The base is provided with a supporting surface; the first support and the second support are both provided with circumferential supporting surfaces and arranged on the supporting surfaces, and a preset distance is reserved between the first support and the second support; the pressure head assembly at least comprises a pressure head; when the load loading device is used, the pressure head assembly is arranged on the upper surface of the ring segment test piece, the first support and the second support the lower surface of the ring segment test piece, and the pressure head assembly applies a test load to the ring segment test piece.
In a first possible implementation manner, the load loading device further includes two base plates, and the two base plates are disposed on the base and are respectively used for supporting the first support and the second support.
In combination with the above possible implementation manners, in a second possible implementation manner, two cushion plates are embedded in the supporting surface of the base.
With reference to the foregoing possible implementation manners, in a third possible implementation manner, the first support and the second support are both cylinders that include multiple sections of the same diameter and are coaxially arranged.
With reference to the foregoing possible implementation manners, in a fourth possible implementation manner, the ring segment test piece is a partial ring body of the bearing support ring; the ring segment test piece is provided with an outer circumferential surface, an inner circumferential surface, at least one mounting hole and two opposite end surfaces, wherein the mounting hole to be tested is one mounting hole in the at least one mounting hole, and the mounting hole to be tested is arranged in the middle of the ring segment test piece and penetrates through the two end surfaces.
In combination with the above possible implementation manners, in a fifth possible implementation manner, a groove is formed in an end portion, close to the ring segment test piece, of the pressure head, the groove extends in the width direction of the ring segment test piece, at least one sphere is accommodated in the groove, and the at least one sphere is sequentially arranged in the groove and is in contact with the upper surface of the ring segment test piece.
With reference to the foregoing possible implementation manner, in a sixth possible implementation manner, at least two bosses arranged along the extending direction of the trench are disposed on both sides of the trench.
With reference to the foregoing possible implementation manners, in a seventh possible implementation manner, an inner circumferential surface of the ring segment test piece is an upper surface, and an outer circumferential surface of the ring segment test piece is a lower surface; and, the inner circumferential surface has a track, and at least one ball is disposed between the track and the groove.
With the above possible implementation manners, in an eighth possible implementation manner, an abutting portion with a U-shaped cross section is provided at an end of the pressure head close to the ring segment test piece, and the abutting portion is in contact with the upper surface of the ring segment test piece.
With reference to the foregoing possible implementation manners, in a ninth possible implementation manner, the inner circumferential surface of the ring segment test piece is a lower surface, and the outer circumferential surface of the ring segment test piece is an upper surface.
In combination with the above possible implementation manners, in a tenth possible implementation manner, the pressure head is arranged corresponding to the mounting hole to be tested, and the load pressure applied by the pressure head is located in a vertical plane where the mounting hole to be tested is located.
In a second aspect, a load loading method is provided for testing the strength of the outer edge or the inner edge of a mounting hole to be tested on a bearing support ring, comprising the following steps:
a, cutting a section of ring body which comprises a mounting hole to be tested on a bearing support ring to obtain a ring section test piece;
b, providing a first support and a second support, supporting the lower surface of the ring segment test piece through the first support and the second support, and distributing the fulcrums of the first support and the second support on two sides of the mounting hole to be tested;
and c, applying a test load to the ring segment test piece, wherein the action point of the test load is positioned between the first support and the second support, and the direction of the applied test load is opposite to the direction of the supporting force provided by the first support and the second support.
In a first possible implementation manner, the method further includes step d: and arranging a strain sensor at the inner edge or the outer edge of the mounting hole to be tested, and collecting a detection signal of the strain sensor when a test load is applied to the ring segment test piece.
In a second possible implementation, in combination with the above possible implementations, the test load is an alternating pressure load.
According to the load loading device and method provided by the invention, a section of ring body containing the mounting hole on the bearing support ring is intercepted and used as a tested piece to carry out a simulated load loading test, the whole bearing support ring does not need to be clamped and loaded, a universal device such as a tension and compression testing machine can be adopted for testing, and the requirement on testing equipment is low.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments of the present invention will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a variable pitch bearing outer ring and a ring segment test piece obtained by the variable pitch bearing outer ring;
FIG. 2 is a schematic structural diagram of a load applying assembly according to an embodiment of the present invention;
FIG. 3 is a schematic view of the construction of the indenter of FIG. 2;
fig. 4 is a schematic structural diagram of a load loading device according to another embodiment of the present invention.
Wherein:
the method comprises the following steps of 1-connecting rod, 2-pressure head, 3-steel ball, 4-baffle, 5-mounting hole to be tested, 6-base, 7-backing plate, 8-first cylinder, 9-second cylinder, 10 a-inner edge ring segment test piece, 10 b-outer edge ring segment test piece, 11-supporting surface, 21-groove and 22-boss.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the present invention. The present invention is in no way limited to any specific structure or arrangement presented below, but rather covers any modification, substitution and improvement of parts, elements and connections without departing from the spirit of the invention.
Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to provide a thorough understanding of embodiments of the invention.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
The invention provides a load loading device and a load loading method, which can be used for applying load to the outer edge or the inner edge of a mounting hole on a bearing support ring. The bearing support ring is generally divided into an inner ring and an outer ring, both of which include an outer circumferential surface, an inner circumferential surface and two opposite end surfaces, i.e., both of which are rotary ring bodies having a rectangular cross-sectional shape. A plurality of mounting holes including mounting holes to be tested are formed in the bearing support ring, and the axis of each mounting hole is parallel to the axis of the bearing support ring. The outer edge of the mounting hole refers to the solid part between the mounting hole and the outer circumferential surface of the support ring, and the inner edge refers to the solid part between the mounting hole and the inner circumferential surface of the support ring.
Referring to fig. 1 and 2, fig. 1 is a schematic structural diagram of a pitch bearing outer ring and a ring segment test piece obtained by the pitch bearing outer ring, and fig. 2 shows a schematic structural diagram of an inner edge ring segment test piece 10 a. The inner edge ring segment test piece 10a is a test piece which is cut from the outer ring of the variable pitch bearing and is processed to be provided with a mounting hole 5 to be tested, and comprises an outer circumferential surface, an inner circumferential surface and two opposite end surfaces; a first supporting part and a second supporting part are processed on the outer circumferential surface of the mounting hole to be measured 5, and materials between the mounting hole to be measured and the outer circumferential surface are removed; the inner circumferential surface of the bearing is provided with a raceway for accommodating bearing balls; the first supporting part and the second supporting part are both grooves parallel to the mounting hole 5 to be tested. The outer edge ring section test piece 10b is a test piece which is cut from the outer ring of the variable-pitch bearing and is processed with a mounting hole 5 to be tested, and comprises an outer circumferential surface, an inner circumferential surface and two opposite end surfaces, wherein a first supporting part and a second supporting part are processed on the inner circumferential surface, and materials between the mounting hole 5 to be tested and the inner circumferential surface are removed; the outer circumferential surface is an arc surface; the first supporting part and the second supporting part are both grooves parallel to the mounting hole 5 to be tested.
The invention provides a load loading device which can be used for applying load to a part of ring bodies obtained from an inner ring or an outer ring of a variable-pitch bearing or a ring segment test piece processed by the part of ring bodies.
Referring to fig. 2, fig. 2 is a schematic structural diagram of a load loading device according to an embodiment of the present invention, which can be used for applying a load to an inner rim ring segment test piece 10 a. The load loading device comprises a base 6, a first support, a second support, two backing plates 7, a plurality of baffle plates 4 and a pressure head assembly.
The base 6 is rectangular plate-shaped and comprises a rectangular supporting surface 11, and two parallel grooves with a preset interval are arranged on the supporting surface 11. The two backing plates 7 are both long rectangular sheets, the shapes of which are the same as the grooves on the base 6 and are embedded in the grooves. In an alternative embodiment, the support surface 11 may not be provided with the two parallel grooves, the two pads 7 may be detachably fixed to the support surface 11 by screws or other means, and the pads 7 may be made of a material having a relatively high hardness and may be replaced when the pads 7 are worn or deformed.
The first and second supports are respectively a first cylinder 8 and a second cylinder 9 with circumferential support surfaces, which are placed on the two base plates 7 with a predetermined distance therebetween, wherein the predetermined distance can be approximately equal to the length of a part of the ring body or ring segment specimen to be supported. In an alternative embodiment, it is also possible that no shim plate 7 is provided, the first cylinder 8 and the second cylinder 9 being directly placeable on the support surface 11 by their circumferential support surfaces.
Referring to fig. 3, fig. 3 is a schematic structural view of the ram 2 of fig. 2. The pressure head component comprises a connecting rod 1, a pressure head 2 and a steel ball 3. The connecting rod 1 is a cylindrical rod, and the pressure head 2 comprises a pressure applying end and a mounting plane opposite to the pressure applying end. The pressing end is provided with a groove 21 for accommodating the steel ball 3 and four bosses 22. The width of the cross section of the groove 21 is the same as the diameter of the steel ball 3, and two bosses 22 arranged along the extending direction of the groove 21 are arranged on both sides of the groove 21. Part of the side wall of the groove 21 is formed on the boss 22, the cross section of the groove at the boss 22 is a major arc, and the steel ball 3 cannot be pulled out from the opening of the groove when being positioned at the boss 22 in the groove 21. The mounting plane of the pressure head 2 is provided with a mounting hole, and the connecting rod 1 is connected in the mounting hole. In use, the indenter 2 is adjacent to the upper surface, i.e., the inner circumferential surface side, of the inner rim ring segment trial 10 a. The groove 21 extends along the width direction of the inner edge ring segment test piece 10a, the two spheres 3 are accommodated in the groove 21, and the two spheres 3 are sequentially arranged in the groove 21, are respectively positioned in the two raceways of the inner edge ring segment test piece 10a, and are in contact with the upper surface of the inner edge ring segment test piece 10 a.
The baffle 4 is a rectangular metal sheet, and the side edge of the baffle is provided with a through hole for mounting the baffle 4 to the side surface of the base 6. The baffle 4 is mounted on four sides around the base 6 and above the support surface 11 of the base 6. The plurality of baffles 4 serve as guard plates for preventing the test piece from splashing or popping up on the supporting surface 11.
The load loading device provided by the present embodiment can apply a load to the inner edge ring segment test piece 10 a. When the inner edge ring segment test piece 10a is used, the first supporting part and the second supporting part of the inner edge ring segment test piece are clamped on the first cylinder 8 and the second cylinder 9 to form a simple supported beam structure. The pressure head component is close to and applies pressure to the upper surface of the inner edge ring segment test piece 10a, specifically, the groove 21 on the pressure head 2 is perpendicular to the raceway on the inner edge ring segment test piece 10a, the steel ball 3 is simultaneously accommodated in the raceway in the inner edge ring segment test piece 10a and the groove 21 on the pressure head 2, and the pressure head component is only contacted with the inner edge ring segment test piece 10a through the steel ball 3 and applies pressure. When pressure is applied to the middle of the inner edge ring segment test piece 10a, namely, the position vertically corresponding to the mounting hole 5 to be tested is applied, the inner edge ring segment test piece 10a is bent, and circumferential stress is generated at the inner edge of the mounting hole 5 to be tested, so that the fatigue strength test of the inner edge of the mounting hole 5 to be tested can be realized without loading the whole variable-pitch bearing outer ring.
The first cylinder 8 and the second cylinder 9 are placed on a support surface 11, with their cylindrical surfaces in contact with the support surface 11 of the base 6. The first cylinder 8 and the second cylinder 9 are not restrained in the direction parallel to the supporting surface 11, namely, the two cylinders do not generate movement or rotation parallel to the supporting surface 11 on the two ends of the inner edge ring segment test piece 10a and only bear the acting force exerted by the pressure head 2. Therefore, a small load is applied to the inner edge ring segment test piece 10a, so that enough strain is generated at the inner edge of the mounting hole to be tested 5.
In an alternative embodiment, the first cylinder 8 and the second cylinder 9 may be composed of a plurality of coaxially arranged cylinders having the same diameter, such as machined from short shaft scraps.
Referring to fig. 4, fig. 4 is a schematic structural diagram of a load loading device according to another embodiment of the present invention. In this embodiment, the load loading device explained in fig. 2 has substantially the same structure, and only the differences are described here, and the same points refer to the above description, and are not repeated here.
The pressure head assembly in the embodiment comprises a connecting rod 1 and a pressure head 2, wherein the surface of the pressure head 2 for applying pressure is a circular arc surface without a groove, and the cross section of the pressure head is approximately U-shaped. The load loading device provided by the embodiment is used for clamping an outer edge ring segment test piece 10b, the outer edge ring segment test piece 10b is a test piece which is cut from an outer ring of a variable pitch bearing and is provided with a mounting hole 5 to be measured, a first supporting part and a second supporting part are processed on the inner circumferential surface of the test piece, and the outer circumferential surface of the test piece is an arc-shaped surface. The inner circumferential surface of the outer edge ring section test piece 10b is a lower surface, the outer circumferential surface of the outer edge ring section test piece 10b is an upper surface, and the pressure head 2 is in contact with the upper surface of the outer edge ring section test piece 10b, is arranged corresponding to the mounting hole 5 to be tested, and can apply pressure to the outer edge ring section test piece 10 b. When the load loading device is used, the outer edge ring section test piece 10b is clamped with the first cylinder 8 and the second cylinder 9 through the first supporting part and the second supporting part to form a simply supported beam structure, the pressure head assembly is close to the upper surface of the outer edge ring section test piece 10b and applies pressure to the outer edge ring section test piece, namely, when the pressure head assembly applies pressure to a position vertically corresponding to the mounting hole 5 to be tested, the outer edge ring section test piece 10b is bent, and circumferential stress is generated at the outer edge of the mounting hole 5 to be tested.
The load loading method provided by the embodiment of the invention comprises the following steps:
and S10, a section of ring body including the mounting hole to be tested on the outer ring of the variable-pitch bearing is intercepted to obtain a ring segment test piece, the mounting hole to be tested is located at the middle position of the ring segment test piece in the circumferential direction, in other words, the distance between the mounting hole to be tested and two intercepting surfaces of the ring segment is approximately equal. In an alternative embodiment, a ring segment containing a mounting hole on the inner ring of the pitch bearing can be cut out to serve as a test piece.
And S20, processing the first supporting part and the second supporting part on the outer circumferential surface of the ring segment test piece to obtain an inner edge ring segment test piece 10a, which comprises the following steps.
Removing partial outer circumference side materials of the ring segment test piece, and processing a first supporting part and a second supporting part on the side, wherein the first supporting part and the second supporting part are long grooves which are parallel to the mounting hole to be tested and penetrate through the ring segment test piece, and the cross section of each long groove is in a semicircular arc or a minor arc shape. And the first supporting part and the second supporting part are symmetrical about a symmetry plane, and the symmetry plane passes through the axis of the mounting hole to be measured and the center line of the outer ring of the variable-pitch bearing. And removing the material between the mounting hole to be tested and the reference plane to change the mounting hole to be tested into a long groove.
And S30, providing a first support and a second support, and respectively supporting two ends of the inner edge ring segment test piece 10a through the first support and the second support, namely supporting the first support and the second support of the inner edge ring segment test piece 10a, wherein the inner edge ring segment test piece 10a and the two supports form a simply supported beam structure. Referring to fig. 2, fig. 2 shows the construction of the simply supported beam. In this embodiment, the first support and the second support are cylindrical support bodies, and the circumferential surface of the cylindrical support body is embedded into the elongated slots of the first support part and the second support part of the inner edge ring segment test piece 10a, so as to form a stable support for the inner edge ring segment test piece 10 a.
And S40, applying an alternating test load to the inner edge ring segment test piece 10a, wherein the direction of the test load is opposite to the direction of the support force provided by the first support and the second support, and the acting point of the test load is positioned in a plane coplanar with the axis of the mounting hole to be tested and the axis of the inner edge ring segment test piece 10 a. Specifically, this step may be performed on a tensile and compressive testing machine, and the alternating load may be applied to the inner edge ring segment trial 10a by a ram assembly shown in fig. 2, which acts on the inner circumferential surface of the inner edge ring segment trial 10 a. The inner edge of the mounting hole to be measured can be subjected to circumferential alternating stress, and the alternating stress can cause fatigue failure at the inner edge, so that the fatigue strength of the inner edge of the mounting hole of the outer ring of the variable-pitch bearing can be measured.
By the method, a section of ring body containing the mounting hole on the outer ring of the variable pitch bearing is intercepted and used as a test piece to carry out a simulation load loading test, the whole outer ring of the variable pitch bearing does not need to be clamped and loaded, a universal device such as a tension and compression testing machine can be used for testing, and the requirement on testing equipment is low. In addition, because the material of the outer edge of the mounting hole to be tested is removed, a small load is applied to the inner edge ring segment test piece 10a, so that sufficient strain can be generated at the inner edge of the mounting hole to be tested, and the requirement on the loading capacity of experimental equipment can be reduced.
In an alternative embodiment, the ring segment trial may be machined into the outer rim ring segment trial 10b shown in FIG. 1. The specific processing process comprises the following steps:
removing partial inner circumference side materials of the ring segment test piece, and processing a first supporting part and a second supporting part on the side, wherein the first supporting part and the second supporting part are long grooves which are parallel to the mounting hole to be tested and penetrate through the ring segment test piece, and the cross section of each long groove is in a semicircular arc or a minor arc shape. And the first supporting part and the second supporting part are symmetrical about a symmetry plane, the symmetry plane passes through the axis of the mounting hole to be tested and the center line of the outer ring of the variable-pitch bearing, materials between the mounting hole to be tested and the reference plane are removed, and the mounting hole to be tested forms an elongated slot.
The first supporting part and the second supporting part of the outer edge ring segment test piece 10b can be supported by the two supports, so that the outer edge ring segment test piece 10b is also set to be a simple beam structure, circumferential stress can be generated at the outer edge of the mounting hole to be tested by applying load to the outer circumferential surface of the outer edge ring segment test piece 10b, and the fatigue strength of the outer edge of the mounting hole of the variable-pitch bearing outer ring is measured.
In an alternative embodiment, when the first supporting portion and the second supporting portion are processed, the material between the mounting hole to be measured and the outer circumferential surface or the inner circumferential surface is not removed. Namely, solid materials of the inner edge and the outer edge of the mounting hole to be measured on the ring segment test piece are reserved. The ring segment test piece with the complete inner edge and the complete outer edge has the stress condition closer to the reality during the load loading test, and the test result is more accurate.
In an optional embodiment, the first supporting part and the second supporting part are not processed on the ring segment test piece, the inner circumferential surface or the outer circumferential surface is directly used as the supporting part to be supported by the first support and the second support, and the first support and the second support are subjected to adaptive deformation to form a simple supporting beam structure with the ring segment test piece.
In another embodiment, the load loading method further includes step S50: and arranging a strain sensor at the inner edge or the outer edge of the mounting hole to be tested, and collecting a detection signal of the strain sensor when a test load is applied to the ring segment test piece. The strain sensor can collect circumferential strain values at the inner edge and/or the outer edge of the ring segment test piece, and the relation between the radial load and the strain at the inner edge and/or the outer edge can be judged.
While the invention has been described with reference to specific embodiments, the invention is not limited thereto, and various equivalent modifications and substitutions can be easily made by those skilled in the art without departing from the scope of the invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (14)
1. A load loading unit, comprising:
a base (6) having a support surface (11);
-a first seat and a second seat, each having a circumferential support surface, arranged on said support face (11), with a predetermined distance therebetween, said first seat and said second seat being free in a direction parallel to said support face; and
a ram assembly comprising at least a ram (2);
when the load loading device is used, the pressure head assembly is arranged on the upper surface of a ring segment test piece, the first support and the second support the lower surface of the ring segment test piece, and the pressure head assembly applies a test load to the ring segment test piece;
the ring segment test piece is a partial ring body of the bearing support ring, the ring segment test piece is provided with a first support part, a second support part and at least one mounting hole, at least one of the mounting holes is a mounting hole (5) to be tested, the first support and the fulcrum of the second support are distributed on two sides of the mounting hole to be tested, the first support part and the second support part are parallel to a groove of the mounting hole to be tested, and the ring segment test piece is clamped on the first support part and the second support part.
2. A load loading unit according to claim 1, further comprising two tie plates (7), said two tie plates (7) being arranged on said base (6) and being adapted to support said first and second seat, respectively.
3. A load loading unit according to claim 2, characterized in that the two tie plates (7) are embedded in the support surface (11) of the base (6).
4. A load loading apparatus as claimed in claim 1, wherein the first and second abutments are each comprised of a plurality of coaxially arranged cylindrical segments of the same diameter.
5. The load loading device of claim 1,
the ring segment test piece is provided with an outer circumferential surface, an inner circumferential surface and two opposite end surfaces;
the mounting hole (5) to be tested is arranged in the middle of the ring segment test piece and penetrates through the two end faces, and the first supporting portion and the second supporting portion are arranged on the outer circumferential surface or the inner circumferential surface.
6. The load loading device according to claim 5, characterized in that the end of the pressure head (2) close to the ring segment test piece is provided with a groove (21), the groove (21) extends along the width direction of the ring segment test piece, at least one sphere (3) is accommodated in the groove (21), and at least one sphere (3) is sequentially arranged in the groove (21) and is in contact with the upper surface of the ring segment test piece.
7. A load loading unit according to claim 6, characterized in that at least two projections (22) are provided on both sides of the groove (21) in the direction of extension of the groove (21).
8. The load loading device according to claim 6 or 7, wherein the inner circumferential surface of the ring segment test piece is an upper surface, and the outer circumferential surface of the ring segment test piece is a lower surface;
and the inner circumferential surface has a track, the at least one ball (3) being arranged between the track and the groove (21).
9. A load loading device according to claim 5, characterized in that the end of the pressure head (2) close to the ring segment test piece is provided with an interference part with a U-shaped section, and the interference part is contacted with the upper surface of the ring segment test piece.
10. The load loading device of claim 9, wherein the inner circumferential surface of the ring segment trial is a lower surface and the outer circumferential surface of the ring segment trial is an upper surface.
11. The load loading device according to claim 1, wherein the pressure head (2) is arranged corresponding to the mounting hole (5) to be tested, and the load pressure applied by the pressure head (2) is in a vertical plane in which the mounting hole (5) to be tested is located.
12. A load loading method is used for testing the strength of the outer edge or the inner edge of a mounting hole to be tested on a bearing support ring, and is characterized by comprising the following steps:
a, cutting a section of ring body containing the mounting hole to be tested on the bearing support ring to obtain a ring segment test piece, and processing a first support part and a second support part on the ring segment test piece, wherein the first support part and the second support part are grooves parallel to the mounting hole to be tested;
b, providing a base with a supporting surface, a first support and a second support, wherein the first support and the second support are provided with circumferential supporting surfaces, the first support and the second support are positioned on the supporting surface and are not constrained in the direction parallel to the supporting surface, the first support and the second support are both grooves parallel to the mounting hole to be tested, the ring segment test piece is clamped to the first support and the second support through the first support and the second support, and supporting points of the first support and the second support are distributed on two sides of the mounting hole to be tested;
and c, applying a test load to the ring segment test piece, wherein the action point of the test load is positioned between the first support and the second support, and the direction of applying the test load is opposite to the direction of the supporting force provided by the first support and the second support.
13. A load loading method as claimed in claim 12, further comprising the step of d: and arranging a strain sensor at the inner edge or the outer edge of the mounting hole to be tested, and collecting a detection signal of the strain sensor when the test load is applied to the ring segment test piece.
14. A load loading method as claimed in claim 12, wherein the test load is an alternating pressure load.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611265008.6A CN106644482B (en) | 2016-12-30 | 2016-12-30 | Load loading device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611265008.6A CN106644482B (en) | 2016-12-30 | 2016-12-30 | Load loading device and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106644482A CN106644482A (en) | 2017-05-10 |
| CN106644482B true CN106644482B (en) | 2020-09-08 |
Family
ID=58839006
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611265008.6A Active CN106644482B (en) | 2016-12-30 | 2016-12-30 | Load loading device and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106644482B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112414854B (en) * | 2020-10-27 | 2022-06-14 | 哈尔滨工程大学 | Curved plate withstand voltage test loading mechanism |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100447550C (en) * | 2006-03-17 | 2008-12-31 | 燕山大学 | Externally swing joint-bearing fatigue experimental apparatus of automatic rotor oblique device for helicopter |
| CN201697795U (en) * | 2010-05-15 | 2011-01-05 | 徐工集团工程机械股份有限公司江苏徐州工程机械研究院 | Axle housing double-side perpendicular independent loading test device |
| RU2523769C1 (en) * | 2012-12-03 | 2014-07-20 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Самарский государственный архитектурно-строительный университет" (СГАСУ) | Setup for sample compression tests for long-term and short-term loading |
| CN103913285B (en) * | 2012-12-31 | 2017-06-09 | 北京建筑工程学院 | A kind of mechanical test device |
| CN203965259U (en) * | 2014-06-16 | 2014-11-26 | 陕西钢铁集团有限公司 | An a kind of roll-type bend testing apparatus |
| CN105466770A (en) * | 2014-09-10 | 2016-04-06 | 北京宇航系统工程研究所 | Tension-bending combination load test apparatus |
| CN205426675U (en) * | 2015-08-25 | 2016-08-03 | 中铁十八局集团第四工程有限公司 | Dual -purpose test bench of bending resistance resistance to plucking of section of jurisdiction |
| CN205138805U (en) * | 2015-12-09 | 2016-04-06 | 广东富华工程机械制造有限公司 | Rigid suspension testing machine |
| CN205209895U (en) * | 2015-12-14 | 2016-05-04 | 中铁二十局集团第五工程有限公司 | Shield tunnel lining segment is loading device for beam test |
| CN105651614A (en) * | 2016-01-25 | 2016-06-08 | 西南交通大学 | Experiment loading device for shield segment and straight beam |
| CN205538486U (en) * | 2016-01-25 | 2016-08-31 | 西南交通大学 | Be used for shield to construct section of jurisdiction and experimental loading device of straight beam |
| CN106124262B (en) * | 2016-06-08 | 2018-08-10 | 哈尔滨理工大学 | For the preparation of ring-shaped work pieces surface layer microhardness exemplar and detection method |
| CN205679481U (en) * | 2016-06-23 | 2016-11-09 | 济南中正试验机制造有限公司 | Opposite side loading frame is used in a kind of shield duct piece bolt extraction-resistant behavior detection |
| CN106248483A (en) * | 2016-07-15 | 2016-12-21 | 核工业理化工程研究院 | The device of test thin-wall pipes hoop tensile strength and method of testing |
| CN106197981B (en) * | 2016-08-12 | 2019-02-12 | 中国航空工业集团公司沈阳发动机设计研究所 | A kind of engine auxiliary installation section structure slow test loading device and method |
-
2016
- 2016-12-30 CN CN201611265008.6A patent/CN106644482B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN106644482A (en) | 2017-05-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5812815B2 (en) | Fretting fatigue test jig, fretting fatigue test apparatus, and fretting fatigue strength evaluation method | |
| CN107727396B (en) | Bearing test equipment | |
| CN106644482B (en) | Load loading device and method | |
| JP2011513701A (en) | Equipment for testing vane base coatings | |
| CN116448420A (en) | Loading device for testing dynamic performance of permanent magnet thrust bearing and design method thereof | |
| CN204758466U (en) | High temperature water under high pressure or steam environment fine motion abrasion tester | |
| JP2015175715A (en) | Test device of tire characteristic | |
| JP5730164B2 (en) | Flaw detection device for rotor disk blade groove | |
| CN110095343B (en) | Multi-directional load test device for ring piece and working method thereof | |
| CN108444691B (en) | Bench test method for up-down stress of plate spring | |
| EP3465137B1 (en) | Jig for mounting samples in a test device for material contact fatigue tests | |
| CN109883631B (en) | Rigidity measuring device | |
| JP2000171370A (en) | Fretting fatigue test method for wheel of automobile and device therefor | |
| KR101325956B1 (en) | Apparatus of fixing ultrasonic probe | |
| EP3115767B1 (en) | Method for the mechanical characterization of a metallic material for wheel disk production | |
| CN111982700B (en) | Large-batch testing device for detecting mechanical property degradation of aeronautical pipeline liner | |
| CN112763228A (en) | Method for predicting risk of abnormal noise caused by friction of material | |
| JP2017211267A (en) | Fretting fatigue test device and fretting fatigue test method | |
| CN106769037A (en) | A kind of adjustable bearing tester of pretightning force | |
| CN111536155A (en) | Pitch staggered bearing retainer and processing method thereof | |
| RU2777808C1 (en) | Support of the test unit for uniaxial compression for fastening samples from materials of predominantly plant origin | |
| CN114486513A (en) | Circumferential tensile test method and test device | |
| CN110044585A (en) | A kind of spherical shape partition fatigue experimental device and test method | |
| KR20100046930A (en) | A load-testing apparatus for connecting-pin | |
| US4458538A (en) | Apparatus and method of measuring edgewise compressive deformation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |