Screw guide reciprocating motion type point contact elastohydrodynamic lubrication oil film measuring device

Abstract

The present invention discloses a screw guide reciprocating motion point contact elastohydrodynamic lubricating oil film measuring device, comprising a lower base plate, a support column, an upper table, a screw guide linear motion device, a coupling, a motor, a motor bracket, a glass plate clamping device, a microscope adjustment device, a loading device, a ball support device, a steel ball, an electric control box, and a computer; the screw guide reciprocating motion point contact elastohydrodynamic lubricating oil film measuring device of the present invention adopts a screw guide device to perform linear reciprocating motion, and has the advantages of high transmission efficiency, high transmission accuracy, and low noise; the glass plate adopts a small-area replaceable solution, which improves the utilization rate of the glass plate; the loading device is a spiral loading mechanism, and the hand wheel is rotated to make the screw rise or fall to achieve the purpose of loading and unloading; during the experiment, the state of the lubricating oil film in the point contact area can be visually observed on the computer and the image can be captured.

Description

Technical Field

[0001] The present invention relates to the technical field related to elastohydrodynamic lubricating oil film measurement, and in particular to a screw guide rail reciprocating motion point contact elastohydrodynamic lubricating oil film measuring device. Background Art

[0002] According to international authoritative organizations, 30%-50% of the world's energy is consumed by friction and wear, and over 60% of material wear is caused by poor lubrication. Lubrication is the most direct and effective means of reducing friction and wear. This is due to the presence of a solid or liquid lubricating film between two contacting surfaces. The key lubrication type for film thickness measurement is elastohydrodynamic lubrication. Interferometry, a film thickness measurement method based on the principle of equal-thickness interference, can measure the thickness of transparent lubricating films. Interferometry can directly obtain information on the film thickness distribution, making it the most effective method for oil film thickness measurement. However, existing measurement devices mostly use rotational motion and large circular glass disks, which results in significant wear and tear on the glass disk. Therefore, a new elastohydrodynamic lubrication oil film measurement device using linear motion is needed. Summary of the Invention

[0003] The object of the present invention is to provide a screw guide reciprocating motion point contact elastohydrodynamic lubricating oil film measuring device to solve the problem that most existing measuring devices are rotary motion, the glass disk is a large disk, and the loss of the glass disk is large.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a screw guide reciprocating motion point contact elastohydrodynamic lubricating oil film measuring device, comprising a lower base plate, a support column, an upper table, a screw guide linear motion device, a coupling, a motor, a motor bracket, a glass plate clamping device, a microscope adjustment device, a loading device, a ball support device, a steel ball, an electric control box, and a computer; the lower base plate is connected to the lower end of the support column by bolts; there are four support columns, and the upper end of the support column is connected to the upper table by bolts; the screw guide linear motion device It includes a screw, a screw nut, a cylindrical guide rail, a guide rail slider, a rolling bearing, a bearing support, a base, a connecting block, and a guide rail support; the base is fixed to the upper table; the inner ring of the rolling bearing is fixed to both ends of the screw, and the outer ring is fixed to the bearing support; the screw and the cylindrical guide rail are fixed to the base through the bearing support and the guide rail support respectively; the screw nut and the guide rail slider are connected to the connecting block; the coupling is connected to the input end of the screw and the output shaft of the motor respectively; the vertical surface of the motor bracket The glass plate clamping device is connected to the motor via bolts, and the horizontal surface is fixed to the upper table via bolts. The glass plate clamping device includes a glass plate clamping fixture, a glass plate, an adjusting screw, and a flange. The glass plate is rectangular and embedded in the glass plate clamping fixture and clamped by the adjusting screw. The adjusting screw and the glass plate clamping fixture form a screw pair. The glass plate clamping fixture is connected to the connecting block via a flange, and the flange is processed with a stop. The microscope adjustment device includes a translation stage bracket, an XYZ translation stage, a microscope fixing bracket, and a microscope. The translation stage bracket is connected to the upper table via bolts. The XYZ translation stage is fixed to the translation stage bracket. The microscope fixing bracket is connected to the upper end of the XYZ translation stage. The microscope is fixed to the microscope fixing bracket. The wiring port on the upper end of the microscope is connected to the computer data acquisition interface. The electrical control components and red and green light emitters are arranged in the electrical control box, and the operation surface is provided with a start button and an emergency stop button. The electrical control box is placed on the lower base plate. The computer is placed next to the measuring device.

[0005] Furthermore, the loading device is a spiral loading mechanism, including a loading plate, a frame, a nut, a screw, and a handwheel; the loading plate is connected to the upper table to form a rotating pair; the upper end of the frame is fixed to the upper table by bolts; there are two nuts, which are welded to the frame; the screw and the nut cooperate to form a spiral pair; the handwheel is fixed to the lower end of the screw, and rotating the handwheel causes the screw to rise or fall to achieve the purpose of loading and unloading.

[0006] Furthermore, the ball support device includes a support base, a V-shaped roller, and a roller shaft; the support base is fixed to the groove of the loading plate by screws; there are two V-shaped rollers, which can rotate around the roller shaft; the roller shaft is fixed to the support base; the steel ball is placed between the two V-shaped rollers.

[0007] The present invention has the following beneficial effects: the screw-guide reciprocating point-contact EHD lubricant film measurement device utilizes a screw-guide assembly for linear reciprocating motion, resulting in high transmission efficiency, high transmission precision, and low noise. The glass plate is designed to be replaceable in a small area, thereby improving its utilization. Furthermore, during the measurement experiment, the state of the lubricant film in the point contact area can be visually observed on a computer, and images can be captured. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0009] Figure 1 This is a front view of the screw guide reciprocating motion type point contact elastohydrodynamic lubricating oil film measuring device of the present invention;

[0010] Figure 2 This is a left side view of the screw guide reciprocating motion point contact elastohydrodynamic lubricating oil film measuring device of the present invention;

[0011] Figure 3 2. It is a structural schematic diagram of a screw guide linear motion device of a screw guide reciprocating motion point contact elastohydrodynamic lubricating oil film measuring device of the present invention;

[0012] Figure 4 2. It is a structural schematic diagram of a glass plate clamping device of a screw guide reciprocating motion point contact elastohydrodynamic lubricating oil film measuring device of the present invention;

[0013] Figure 5 The present invention is a schematic structural diagram of a ball support device of a screw guide rail reciprocating motion type point contact elastohydrodynamic lubricating oil film measuring device.

[0014] In the figure: 1-lower base plate; 2-support column; 3-upper table; 4-screw guide linear motion device; 5-coupling; 6-motor; 7-motor bracket; 8-glass plate clamping device; 9-microscope adjustment device; 10-loading device; 11-ball support device; 12-steel ball; 13-electric control box; 14-computer; 401-screw; 402-screw nut; 403-cylindrical guide rail; 404-guide rail slider; 405-rolling bearing; 406-bearing support; 407-bottom Seat; 408-connecting block; 409-guide rail support; 801-glass plate clamping fixture; 802-glass plate; 803-adjusting screw; 804-flange; 901-translation stage bracket; 902-XYZ translation stage; 903-microscope fixing bracket; 904-microscope; 1001-loading plate; 1002-frame; 1003-nut; 1004-screw; 1005 handwheel; 1101-support base; 1102-V-roller; 1103-roller shaft. DETAILED DESCRIPTION

[0015] The specific implementation of the present invention will be further described below with reference to the accompanying drawings.

[0016] like Figure 1 、 2, 3, 4, 5, the present invention comprises a screw guide rail reciprocating motion type point contact elastohydrodynamic lubricating oil film measuring device, comprising a lower base plate 1, a support column 2, an upper table 3, a screw guide rail linear motion device 4, a coupling 5, a motor 6, a motor bracket 7, a glass plate clamping device 8, a microscope adjustment device 9, a loading plate 1001, a ball support device 11, a steel ball 12, a loading device 10, an electric control box 13, and a computer 15; the lower base plate 1 is connected to the lower end of the support column 2 by bolts; there are four support columns 2, and the upper end of the support column 2 is connected to the upper table 3 by bolts; the screw guide rail linear motion device 4 comprises a screw 401, a screw nut 402, a cylindrical guide 403, guide rail slider 404, rolling bearing 405, bearing support 406, base 407, connecting block 408, guide rail support 409; the base 407 is fixed to the upper table 3; the inner ring of the rolling bearing 405 is fixed to both ends of the screw 401, and the outer ring is fixed to the bearing support 406; the screw 401 and the cylindrical guide rail 403 are respectively fixed to the base 407 through the bearing support 406 and the guide rail support 409; the screw nut 402 and the guide rail slider 404 are connected to the connecting block 408; the coupling 5 is respectively connected to the input end of the screw 401 and the output shaft of the motor 6; the motor bracket 7 The vertical surface is connected to the motor 6 by bolts, and the horizontal surface is fixed to the upper table 3 by bolts; the glass plate clamping device 8 includes a glass plate clamping fixture 801, a glass plate 802, an adjusting screw 803, and a flange 804; the glass plate 802 is rectangular and embedded in the glass plate clamping fixture 801, and is clamped by the adjusting screw 803, and the adjusting screw 803 and the glass plate clamping fixture 801 form a screw pair; the glass plate clamping fixture 801 is connected to the connecting block 408 through the flange 804, and the flange 804 is processed with a stop; the microscope adjustment device 9 includes a translation stage bracket 901, an XYZ translation stage 902, a display Micromirror fixing bracket 903, microscope 904; the translation stage bracket 901 is connected to the upper table 3 by bolts; the XYZ translation stage 902 is fixed on the translation stage bracket 901; the microscope fixing bracket 903 is connected to the upper end of the XYZ translation stage 902; the microscope 904 is fixed in the microscope fixing bracket 903; the wiring port on the upper end of the microscope 904 is connected to the data acquisition interface of the computer 14; the electrical control components and red and green light source emitters are set in the electrical control box 13, and the operation surface is provided with a start button and an emergency stop button. The electrical control box 13 is placed on the lower base plate 1; the computer 14 is placed next to the measuring device.

[0017] Furthermore, the loading device 10 is a spiral loading mechanism including a loading plate 1001, a frame 1002, a nut 1003, a screw 1004, and a handwheel 1005; the loading plate 1001 is connected to the upper table 3 to form a rotating pair; the upper end of the frame 1002 is fixed to the upper table 3 by bolts; there are two nuts 1003, which are welded to the frame 1002; the screw 1004 and the nut 1003 cooperate to form a spiral pair; the handwheel 1005 is fixed to the lower end of the screw 1004, and rotating the handwheel 1005 causes the screw 1004 to rise or fall to achieve the purpose of loading and unloading.

[0018] Furthermore, the ball support device 11 includes a support base 1101, a V-shaped roller 1102, and a roller shaft 1103. The support base 1101 is fixed to the groove of the loading plate 1001 by screws; there are two V-shaped rollers 1102, which can rotate around the roller shaft 1103; the roller shaft 1103 is fixed to the support base 1101; and the steel ball 12 is placed between the two V-shaped rollers 1102.

[0019] like Figure 1 、 2 As shown in Figures 3, 4, and 5, the working method of the screw guide reciprocating motion point contact EHL lubricating oil film measuring device of the present invention is as follows: start the computer 14 and the electric control box 13, and after the equipment is operating normally, take out the glass plate 802, clean it and blow it dry, and then install it in the glass plate clamping fixture 801, use the adjusting screw 803 to fix the glass plate 802, open the PLC control program to make the motor 6 drive the screw guide linear motion device 4 to drive the glass plate 802 to slowly reciprocate for leveling; rotate the handwheel 1005 to slowly load the loading plate 1001 so that the steel ball 12 forms a point contact area with the glass plate 802, adjust the position and magnification of the microscope 904 until a clear and complete image is formed on the screen of the computer 14; add lubricant to the contact position of the glass plate 802 with the steel ball 12; set the experimental parameters, and collect images of the reciprocating point contact EHL lubricating oil film in the experiment; perform post-processing on the computer 14 after the image collection is completed; by changing the experimental parameters, the oil film image and film thickness value under different experimental conditions can be obtained.

[0020] The scope of protection of the present invention is not limited to the above. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be covered by the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection defined by the claims.

Claims

1. Screw guide reciprocating motion point contact elastohydrodynamic lubricating oil film measuring device, characterized by: The cam is connected to the upper and lower ends of the drive shaft by bolts, and the cam is connected to the upper and lower ends of the drive shaft by bolts. The upper table; the glass plate clamping device includes a glass plate clamping fixture, a glass plate, an adjusting screw, and a flange; the glass plate is rectangular and is embedded in the glass plate clamping fixture and clamped by the adjusting screw, and the adjusting screw and the glass plate clamping fixture form a screw pair; the glass plate clamping fixture is connected to the connecting block through a flange, and the flange is processed with a stop; the microscope adjustment device includes a translation stage bracket, an XYZ translation stage, a microscope fixing bracket, and a microscope; the translation stage bracket is connected to the upper table by bolts; the XYZ translation stage is fixed on the translation stage bracket; the microscope fixing bracket is connected to the upper end of the XYZ translation stage translation stage; the microscope is fixed in the microscope fixing bracket; the wiring port on the upper end of the microscope is connected to the computer data acquisition interface; electrical control components and red and green light source emitters are set in the electric control box, and the operation surface is provided with a start button and an emergency stop button, the electric control box is placed on the lower base plate; the computer is placed next to the measuring device; The loading device is a screw loading mechanism, including a loading plate, a frame, a nut, a screw, and a handwheel; The ball support device includes a support base, a V-shaped roller, and a roller shaft; the support base is fixed to the groove of the loading plate by screws; there are two V-shaped rollers, which can rotate around the roller shaft; the roller shaft is fixed to the support base; the steel ball is placed between the two V-shaped rollers.

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