A heavy load high speed reciprocating wear testing machine

Abstract

The application discloses a heavy-load high-speed reciprocating wear testing machine, which comprises a base and a loading device, the base is provided with a stroke slide rail on the upper portion, the stroke slide rail is installed with a sliding plate capable of reciprocating sliding on the stroke slide rail, a fixing seat for fixing a test piece is arranged above the sliding plate, the loading device is provided with a loading rod for testing the test piece on the lower portion, and the loading device is further provided with an oil injection pipe for spraying lubricating oil to the test piece. The heavy-load reciprocating wear testing machine can not only flexibly and stably realize the heavy-load high-speed reciprocating operation of the wear surface of the test piece under the continuous lubricating condition, but also is convenient for keeping the test piece uniform in lateral force and effective in wear position, and is especially suitable for carrying out the short-range heavy-load high-speed reciprocating wear test.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of abrasion test equipment, in particular to a heavy load high-speed reciprocating abrasion test machine. BACKGROUND

[0002] The aircraft landing gear is an important safety function component of the aircraft, and is an important support system for the aircraft take-off, landing, ground taxiing and parking, and is the main load-bearing structure of the aircraft. In recent years, the main components of the landing gear have begun to use new high-performance coating processes, such as high-velocity oxygen fuel spraying HVOF, metal ceramic corrosion-resistant coating MCAC, diamond film layer DLC, etc., in order to obtain better surface protection performance such as wear resistance, corrosion resistance and low hydrogen brittleness.

[0003] In order to consider that the coating layer has the same ability as the landing gear, including ① bearing capacity, can withstand the landing impact load throughout the life, and does not produce cracks, peeling and falling off; ② wear resistance, meets the use requirements throughout the life; ③ appropriate friction coefficient, avoids the jamming of the moving joint, it is necessary to carry out high load, high speed and long distance sliding wear test on the shaft load-bearing parts of the landing gear with coating.

[0004] Due to the different test emphasis and purpose, the existing wear test machine mainly tests small standard test pieces, the load capacity of the equipment is limited, the design value of the transmission speed is not high, and the real application scene of the test piece cannot be simulated to improve the wear operation parameters. For large-scale shaft parts with a length of 250mm or more, it is not flexible, stable and effective to carry out wear test of the sinusoidal curve driving mode with a load of more than 10000N and a relative sliding speed of 2m / s. SUMMARY

[0005] The purpose of the present application is to provide a heavy load high-speed reciprocating wear test machine which is easy to load parts and test pieces, has high flexibility and good stability, and is suitable for different specifications of test pieces.

[0006] The present application is realized by the following technical scheme: a heavy load high-speed reciprocating wear test machine, comprising a lower base and an upper loading device, the base is provided with a stroke sliding rail on the upper part, the stroke sliding rail is provided with a sliding plate capable of reciprocating sliding on the stroke sliding rail, a fixing seat for fixing the test piece is arranged above the sliding plate, the loading device is provided with a loading rod for testing the test piece at the lower part, and the loading device is further provided with an oil injection pipe for spraying lubricating oil to the test piece.

[0007] In order to better realize the present application, further, two springs are arranged on both sides of the base, one end of the two springs on the same side is fixed to the side edge of the base, and the other end is fixed to the side edge of the sliding plate, and the two springs on the same side are symmetrically arranged with the center axis of the base.

[0008] To better realize the present invention, a groove is further provided in the middle of the base, and a slider is provided in the lower part of the sliding plate, which is inserted into the groove. The slider is placed inside the base and can reciprocate within the groove.

[0009] To better realize the present invention, a servo motor is further installed in the base, a rotating disk is installed on the drive shaft of the servo motor, an eccentric pin is provided at the eccentric position on the outer side of the rotating disk, a strip-shaped through groove is provided in the middle of the slider, and the eccentric pin on the rotating disk is placed in the through groove in the middle of the slider.

[0010] To better realize the present invention, a needle roller bearing is further installed on the eccentric pin placed in the through groove.

[0011] To better realize the present invention, the lower part of the sliding plate is provided with a groove matching the travel slide rail, the upper part of the sliding plate is provided with a self-aligning slide rail, the upper part of the self-aligning slide rail is provided with a sample plate that can slide on the self-aligning slide rail, the lower part of the sample plate is provided with a groove matching the self-aligning slide rail, and the upper part of the sample plate is provided with a fixing seat for fixing the test piece.

[0012] To better realize the present invention, an oil receiving tray is further provided below the base.

[0013] To better realize the present invention, the loading rod is further perpendicular to the test piece, and the lower end of the loading rod is provided with an arc-shaped concave portion that matches the test arc surface of the test piece.

[0014] To better realize the present invention, the test piece is further fixed with a fixing seat and parallel to the travel slide rail.

[0015] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0016] (1) By setting symmetrical springs, the present invention ensures that the test piece can flexibly and stably achieve heavy-load high-speed reciprocating operation during short-distance high-speed testing, avoids serious collisions due to inertia during high-speed movement of the mechanism, and makes speed control during steering process more stable.

[0017] (2) The present invention designs a self-aligning slide rail so that during the process of the arc-shaped concave part at the lower end of the loading rod slowly and vertically applying heavy load to the test piece, the self-aligning slide rail automatically adjusts its position under the load force to ensure that the axis of the test piece and the center of the upper loading rod are on the vertical plane, ensuring that the test piece is subjected to uniform lateral force and that the wear position of the test piece is at the top center when placed horizontally.

[0018] (3) The application ingeniously integrates the continuous medium lubrication injection device with the friction and wear test, so that the test piece surface can be continuously sprayed with lubricating medium during the test, and the surface is kept in a continuous lubricating state, so that the application is especially suitable for carrying out heavy load high-speed reciprocating wear test. BRIEF DESCRIPTION OF DRAWINGS

[0019] Other features, objects, and advantages of the application will become more apparent from the following detailed description of non-limiting embodiments, when read in conjunction with the accompanying drawings:

[0020] Figure 1 is a formal structural schematic diagram of the application;

[0021] Figure 2 is a left view structural schematic diagram of the application.

[0022] Wherein: 1 - base, 2 - loading device, 3 - stroke slide rail, 4 - sliding plate, 5 - fixed seat, 6 - loading rod, 7 - oil injection pipe, 8 - spring, 9 - sliding block, 10 - servo motor, 11 - rotating disc, 12 - eccentric pin, 13 - through slot, 14 - needle roller bearing, 15 - aligning slide rail, 16 - sample plate, 17 - oil receiving disc, 18 - test piece. DETAILED DESCRIPTION

[0023] The embodiments of the application are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary only, and are used only for explaining the application, and cannot be understood as a limitation of the application.

[0024] In the description of the application, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the application.

[0025] In the description of the application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0026] Embodiment 1

[0027] The main structure of the embodiment, as shown in Figure 1 , Figure 2 , includes a lower base 1 and an upper loading device 2, the base 1 is provided with a stroke slide rail 3 on the upper part, a sliding plate 4 capable of reciprocating sliding on the stroke slide rail 3 is installed on the stroke slide rail 3, a fixing seat 5 for fixing a test piece 18 is arranged above the sliding plate 4, and the loading device 2 is provided with a loading rod 6 for testing the test piece 18 on the lower part, and the lower part of the loading device 2 is further provided with an oil injection pipe 7 for spraying lubricating oil to the test piece 18.

[0028] Specifically, the test piece 18 is installed on the fixing seat 5, the loading rod 6 contacts the test piece 18, and the test piece 18 is provided with a vertical load, so as to ensure that the test piece 18 is subjected to a wear resistance test under heavy load. The sliding plate 4 is pushed to make the sliding plate 4 reciprocate on the stroke slide rail 3, thereby driving the test piece 18 to reciprocate, and the test piece 18 is subjected to a wear resistance test under the vertical load of the upper loading rod 6, while the oil injection pipe 7 sprays lubricating medium on the surface of the test piece 18, so that the surface of the test piece 18 is covered with lubricating medium, and the surface of the test piece 18 is kept in a continuous lubrication state.

[0029] The loading device 2 and the loading rod 6 are installed on the existing height adjusting device, and the height can be adjusted. In addition, the loading device 2 is provided with an oil circuit system for providing lubricating medium for the oil injection pipe 7. Since the upper loading device and the oil circuit system are prior art and are not the core components of the technical solution, they are not described in detail, but this does not affect the use of the device by those skilled in the art, and those skilled in the art can select appropriate loading devices 2 and oil circuit systems according to common knowledge.

[0030] Embodiment 2

[0031] The embodiment further adds a spring 8 on the basis of the above-mentioned embodiment, as shown in Figure 1 , two springs 8 are arranged on both sides of the base 1, one end of the two springs 8 on the same side is fixed to the side edge of the base 1, and the other end is fixed to the side edge of the sliding plate 4, and the two springs 8 on the same side are symmetrically arranged with the center axis of the base 1. The arrangement of the spring can ensure that the test piece can flexibly and stably realize high-speed reciprocating operation under heavy load in a short distance, avoid serious collision of the mechanism during high-speed movement due to inertia, and make the speed control more stable during turning. The other parts of the embodiment are the same as those of the above-mentioned embodiment, and will not be described again.

[0032] Embodiment 3

[0033] The embodiment is further limited to the structure of the sliding plate 4 based on the above embodiment, as shown in Figure 1 , Figure 2 The middle part of the base 1 is provided with an embedding groove, and the lower part of the sliding plate 4 is provided with a sliding block 9 embedded in the embedding groove. The sliding block 9 is placed inside the base 1 and can reciprocate in the embedding groove. By adding the sliding block 9, the sliding block 9 can be reciprocated in the embedding groove in the base 1, thereby driving the sliding plate 4 to reciprocate on the upper part of the base 1 which forms a sliding rail 4. The setting of the sliding block 9 makes the driving of the sliding plate 4 more diversified, and facilitates the further driving of the sliding plate 4 to reciprocate by an additional driving structure. The other parts of the embodiment are the same as the above embodiment and will not be repeated.

[0034] Embodiment 4:

[0035] The embodiment is further limited to the driving structure of the sliding plate 4 based on the above embodiment, as shown in Figure 1 , Figure 2 A servo motor 10 is installed in the base 1. An eccentric pin 12 is arranged at the eccentric position of the outer side of a rotating disc 11 installed on the driving shaft of the servo motor 10. A strip-shaped through groove 13 is arranged in the middle part of the sliding block 9. The eccentric pin 12 on the rotating disc 11 is placed in the through groove 13 in the middle part of the sliding block 9. When the rotating disc 11 is driven to rotate by the driving shaft of the servo motor 10, the eccentric pin 12 can be moved up and down in the through groove 13. Since the eccentric pin 12 is arranged eccentrically, it can drive the sliding block 9 to move reciprocally left and right. Since the sliding block 9 is integrally arranged with the sliding plate 4, the sliding plate 4 can be driven by the servo motor 10 to move reciprocally on the stroke sliding rail 3, thereby enabling the upper fixed test piece 18 to be subjected to the abrasion resistance test under the action of the loading rod 6. The other parts of the embodiment are the same as the above embodiment and will not be repeated.

[0036] Embodiment 5:

[0037] The embodiment is further limited to the driving structure of the sliding plate 4 based on the above embodiment, as shown in Figure 1 , Figure 2 A needle bearing 14 is further installed on the eccentric pin 12 placed in the through groove 13. The needle bearing 14 is arranged to enable the eccentric pin 12 to move up and down in the through groove 13 of the sliding block 9. Since the eccentric pin 12 will exert a force on the side wall of the through groove 13, the needle bearing 14 is specially added to reduce the abrasion of the side wall of the through groove 13. The other parts of the embodiment are the same as the above embodiment and will not be repeated.

[0038] Embodiment 6:

[0039] This embodiment, based on the above embodiment, further adds an adjustment mechanism to the test piece 18, such as... Figure 1 , Figure 2 As shown, the lower part of the sliding plate 4 is provided with a groove matching the travel slide rail 3, and the upper part of the sliding plate 4 is provided with a self-aligning slide rail 15. A sample plate 16, capable of sliding on the self-aligning slide rail 15, is mounted on the upper part of the self-aligning slide rail 15. The lower part of the sample plate 16 is provided with a groove matching the self-aligning slide rail 15, and the upper part of the sample plate 16 is provided with a fixing seat 5 for fixing the test piece 18. The self-aligning slide rail 15 ensures that during the slow, vertical application of a heavy load to the test piece 18 by the lower end of the loading rod 6, the self-aligning slide rail 15 automatically adjusts its position under the load force, ensuring that the axis of the test piece 18 and the center of the upper loading rod 6 are in the vertical plane, guaranteeing uniform lateral force on the test piece, and ensuring that the wear position of the test piece 18 is at the top center when placed horizontally. Other parts of this embodiment are the same as those in the above embodiment and will not be described again.

[0040] Example 7:

[0041] This embodiment, based on the above embodiment, further adds an oil receiving tray 17, such as... Figure 1 , Figure 2 As shown, an oil receiving tray 17 is also provided below the base 1. The oil receiving tray 17 is mainly provided to facilitate the flow of lubricating medium into the oil receiving tray, realize the recycling of lubricating medium, save costs, and avoid pollution to the surrounding environment. The other parts of this embodiment are the same as those in the above embodiment, and will not be described again.

[0042] Example 8:

[0043] This embodiment, based on the above embodiment, further defines the positional relationship between the loading rod 6 and the test piece 18, such as... Figure 1 , Figure 2 As shown, the loading rod 6 is perpendicular to the test piece 18, and the lower end of the loading rod 6 is provided with an arc-shaped concave portion that matches the test arc surface of the test piece 18. Other parts of this embodiment are the same as those in the above embodiment and will not be described again.

[0044] Example 9:

[0045] This embodiment, based on the above embodiment, further defines the fixing relationship of the test piece 8, such as... Figure 1 , Figure 2 As shown, the test piece 18, after being fixed by the fixing seat 5, is parallel to the travel slide rail 3. The other parts of this embodiment are the same as those in the above embodiment and will not be described again.

[0046] It can be understood that the working principle and working process of the components such as the servo motor 10 and the oil injection pipe 7 of the heavy load high-speed reciprocating wear testing machine structure according to one embodiment of the present application are all prior art and are well known to those skilled in the art, and thus will not be described in detail here.

[0047] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A heavy load high speed reciprocating wear tester characterized by, The base (1) includes a lower part and an upper part of the loading device (2), the stroke slide rail (3) is arranged on the upper part of the base (1), the sliding plate (4) capable of reciprocating sliding on the stroke slide rail (3) is arranged on the stroke slide rail (3), the fixing seat (5) for fixing the test piece (18) is arranged above the sliding plate (4), the loading rod (6) for testing the test piece (18) is arranged on the lower part of the loading device (2), and the oil injection pipe (7) for spraying lubricating oil to the test piece (18) is also arranged on the lower part of the loading device (2); two springs (8) are arranged on the two sides of the base (1), one end of the two springs (8) on the same side is fixed on the side edge of the base (1), the other end is fixed on the side edge of the sliding plate (4), and the two springs (8) on the same side are symmetrically arranged with the center axis of the base (1) as the center; the slide groove matched with the stroke slide rail (3) is arranged on the lower part of the sliding plate (4), the centering slide rail (15) is arranged on the upper part of the sliding plate (4), the sample plate (16) capable of sliding on the centering slide rail (15) is arranged on the upper part of the centering slide rail (15), the slide groove matched with the centering slide rail (15) is arranged on the lower part of the sample plate (16), and the fixing seat (5) for fixing the test piece (18) is arranged on the upper part of the sample plate (16); under the action of the load force, the centering slide rail (15) automatically adjusts the position, ensures that the center axis of the test piece (18) and the center of the upper loading rod (6) are on the vertical plane, ensures that the test piece is uniformly stressed in the transverse direction, and makes the wear position of the test piece (18) be on the horizontal top center; the loading rod (6) is perpendicular to the test piece (18), and the lower end of the loading rod (6) is provided with an arc-shaped recess matched with the test arc surface of the test piece (18).

2. A heavy duty high speed reciprocating wear tester according to claim 1, characterized in that, The base (1) is provided with an embedding groove in the middle, the sliding block (9) embedded in the embedding groove is arranged on the lower part of the sliding plate (4), and the sliding block (9) is arranged in the base (1) and can reciprocate in the embedding groove.

3. A heavy duty high speed reciprocating wear tester according to claim 2, wherein, The servo motor (10) is arranged in the base (1), the driving shaft of the servo motor (10) is provided with the rotating disc (11), the eccentric pin (12) is arranged at the eccentric position outside the rotating disc (11), the strip-shaped through groove (13) is arranged in the middle of the sliding block (9), and the eccentric pin (12) arranged in the rotating disc (11) is arranged in the through groove (13) in the middle of the sliding block (9).

4. A heavy duty high speed reciprocating wear tester according to claim 3, wherein The needle roller bearing (14) is further arranged on the eccentric pin (12) arranged in the through groove (13).

5. The heavy duty high speed reciprocating abrasion tester as claimed in claim 1, wherein, The oil receiving disc (17) is further arranged below the base (1).

6. A heavy duty high speed reciprocating wear tester as claimed in claim 1 wherein, The test piece (18) fixed by the fixing seat (5) is parallel to the stroke slide rail (3).

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