Testing device for measuring sealing pressure of turntable bearing sealing ring
By designing a test device for measuring the sealing pressure of the turntable bearing sealing ring, the problem of inability to measure the sealing pressure in the prior art is solved, and the cross-sectional shape of the sealing ring is optimized, which reduces the friction torque when the inner ring of the bearing is rotated.
Patent Information
- Application Number
- CN202410124353.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-30
- Publication Date
- 2025-08-01
AI Technical Summary
There is a lack of a device for measuring the sealing pressure of the turntable bearing sealing ring in the prior art, which makes it impossible to effectively adjust the cross-sectional shape of the sealing ring to reduce the friction torque when the inner ring of the bearing rotates.
A test device is designed, including a horizontal and vertical displacement fixing table, a pressure sensor and a digital scale, to measure the sealing pressure by simulating the radial and axial squirting of the shaft, adjusting the thickness and angle of the sealing ring to reduce friction torque.
Accurate measurement of sealing pressure is achieved, and the cross-sectional shape of the sealing ring can be adjusted according to the measured sealing pressure value, thereby reducing the friction torque when the bearing inner ring rotates.
Smart Images
Figure CN120404124A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a test device for the sealing performance of a rotary table bearing seal ring, and more particularly to a test device for measuring the sealing pressure of a rotary table bearing seal ring. Background Art
[0002] The normal operation of a rotary table bearing depends on reliable sealing. On the one hand, it prevents the leakage of lubricating oil inside the bearing, and on the other hand, it prevents external water vapor, dust and other debris from entering the bearing interior. In the prior art, the rotary table bearing is mainly sealed with a rubber seal ring. The basic structure of the rubber seal ring for the rotary table bearing mainly includes an annular seal body 1. One side of the annular seal body has a mounting portion 2, and the mounting portion extends into the circumferential sealing groove 4 of the bearing outer ring 3. The other side of the annular seal body has a water sealing limb 5 and an oil sealing limb 6. The water sealing limb is used to seal the radial surface 8 of the bearing inner ring 7, and the oil sealing limb is used to seal the axial surface 9 of the bearing inner ring.
[0003] During the use of the rotary table bearing, the shaft on which the rotary table bearing is installed often exhibits axial or radial runout, and correspondingly, the bearing inner ring also makes corresponding axial or radial displacements. In the design process of the bearing seal ring, the axial displacement and radial displacement of the shaft are taken into account. A relatively large interference amount is added when the oil sealing limb seals the axial surface of the bearing inner ring, and a relatively large interference amount is also added when the water sealing limb seals the radial surface of the bearing inner ring. This undoubtedly increases the frictional torque when the bearing inner ring rotates, and the frictional torque is even greater when the shaft is displaced.
[0004] The frictional torque is directly related to the sealing pressure of the sealing limb. The sealing pressure is not only related to the thickness and interference amount of the sealing limb, but also related to the composition and ratio of the rubber. Since the composition of the rubber is very complex, it is impossible to quantitatively analyze the influence on the sealing pressure according to the composition and ratio of the rubber. There is also no test device in the prior art for measuring the influence of the interference amount and the thickness of the sealing limb on the sealing pressure. Summary of the Invention
[0005] The technical problem to be solved by the present invention is to provide a test device for measuring the sealing pressure of a rotary table bearing seal ring. According to the measured sealing pressure value, the cross-sectional shape of the rotary table bearing seal ring can be adjusted accordingly, thereby reducing the frictional torque when the bearing inner ring rotates.
[0006] To solve the above technical problems, the test device of the present invention for measuring the sealing pressure of the sealing ring of a slewing bearing has a horizontal test bench. A vertical lifting mechanism is fixed on the left side of the test bench, a vertical displacement fixing table mounted on the vertical lifting mechanism, and a digital display vertical scale for measuring the vertical displacement generated by the vertical displacement fixing table. A left mounting table with an L-shaped cross-section is formed on the right side of the vertical displacement fixing table, and a vertical pressure sensor is installed on the horizontal tabletop of the left mounting table. A horizontal moving mechanism is fixed on the right side of the test bench, a horizontal displacement fixing table mounted on the horizontal moving mechanism, and a digital display horizontal scale for measuring the horizontal displacement generated by the horizontal displacement fixing table. An upper left part of the left side of the horizontal displacement fixing table forms a right mounting table corresponding to the cross-sectional shape of the left mounting table, and a horizontal pressure sensor is installed on the vertical tabletop of the right mounting table. It further includes left and right sealing pressure test pieces whose shapes are respectively adapted to the left and right mounting tables and can respectively abut against the left and right mounting tables. The left sealing pressure test piece at least includes a radial sealing pressure test surface at the top and an axial pressure test surface on the right side. At least a sealing member installation groove is formed on the left side of the right sealing pressure test piece. When the sealing member is installed in the installation groove, at least one sealing limb abuts against the radial sealing pressure test surface and the other sealing limb abuts against the axial pressure test surface.
[0007] Further, the digital display vertical scale includes a vertical scale and a first digital display. The outer wall of the first digital display is fixed on the outer wall of the vertical displacement fixing table. The digital display horizontal scale includes a horizontal scale and a second digital display. The outer wall of the second digital display is fixed on the outer wall of the horizontal displacement fixing table.
[0008] As an improvement of the present invention, the vertical lifting mechanism includes a base fixed on the left side of the test bench. Vertical columns extending upward are fixed at the front and rear ends of the base. A top cross beam is fixedly connected between the tops of the vertical columns at the front and rear ends. The vertical displacement fixing table is located between the base and the top cross beam. A vertical lead screw is installed at the middle position of the vertical displacement fixing table. The two ends of the vertical lead screw are respectively vertically installed on the base and the top cross beam through bearings. The top end of the vertical lead screw extends out of the top cross beam and is equipped with a rotating hand wheel. Vertical guide columns are also installed on the vertical displacement fixing table at intervals. The upper and lower ends of the vertical guide columns are respectively fixed on the base and the top cross beam. By rotating the rotating hand wheel, the vertical displacement fixing table can move up and down between the base and the top cross beam.
[0009] Further, first copper bushings are also installed on the vertical displacement fixing table at intervals. The vertical guide columns pass through the first copper bushings and the upper and lower ends are respectively fixed on the base and the top cross beam.
[0010] As a further improvement of the present invention, the horizontal movement mechanism includes left and right frames fixed on the test bench on the right side of the base. The horizontal displacement fixing table is located between the left and right frames. A horizontal lead screw is installed at the lower middle of the horizontal displacement fixing table. The two ends of the horizontal lead screw are horizontally installed on the left and right frames through the bearings respectively. The right end of the horizontal lead screw extends out of the right frame and is equipped with the rotating handwheel. Horizontal guide columns are also installed on the horizontal displacement fixing table at intervals. The left and right ends of the horizontal guide columns are respectively fixed on the left and right frames. By rotating the rotating handwheel, the horizontal displacement fixing table can move horizontally between the left and right frames.
[0011] Furthermore, second copper bushings are also installed on the horizontal displacement fixing table at intervals. The horizontal guide columns pass through the second copper bushings and the left and right ends are respectively fixed on the left and right frames.
[0012] When the present invention is in use, a sealing strip with a cross-sectional shape consistent with that of the rotary table bearing seal ring is taken. The installation part of the sealing strip is inserted into the seal installation groove on the left side of the right seal pressure test piece. The water sealing limb and the oil sealing limb respectively abut against the radial seal pressure test surface and the axial pressure test surface of the left seal pressure test piece. At this time, the right seal pressure test piece is equivalent to the bearing outer ring, the left seal pressure test piece is equivalent to the bearing inner ring, and the sealing strip is equivalent to the rotary table bearing seal ring. The radial seal pressure test surface and the axial pressure test surface are respectively equivalent to the radial surface and the axial surface of the bearing inner ring. Controlling the up and down movement of the vertical displacement fixing table can simulate the radial runout of the shaft, and controlling the horizontal movement of the horizontal displacement fixing table can simulate the axial runout of the shaft. The vertical pressure sensor on the horizontal table surface of the left installation table can measure the radial seal pressure of the sealing strip when the vertical displacement fixing table moves up and down to simulate the radial runout of the shaft; the horizontal pressure sensor on the vertical table surface of the right installation table can measure the axial seal pressure of the sealing strip when the horizontal displacement fixing table moves horizontally to simulate the axial runout of the shaft. Based on the fact that the frictional torque is related to the seal pressure of the seal limb, and the seal pressure is related to the thickness and seal interference of the seal limb, the seal pressure of the seal limb can be simply tested multiple times, and the thickness, length and inclination angle of the seal limb in the sealing strip can be adjusted according to the measured seal pressure. On the premise of ensuring the seal pressure required for the seal effect, the cross-sectional shape of the seal ring can be adjusted by adjusting the thickness, length or inclination angle of the seal limb of the rotary table bearing seal ring, so as to appropriately reduce the seal pressure, thereby reducing the frictional torque when the bearing inner ring rotates. In the present invention, the first and second digital displays can display the vertical displacement and horizontal displacement values in real time, which is convenient for observation; the up and down movement of the vertical displacement fixing table and the horizontal movement of the horizontal displacement fixing table in the present invention are both driven by the lead screw and guided by the guide column, with stable movement and easy operation. Description of the Drawings
[0013] The present invention will be further described in detail below with reference to the accompanying drawings.
[0014] Figure 1 It is a schematic partial sectional view of a slewing bearing with a sealing ring installed in the prior art.
[0015] Figure 2 It is a schematic front partial sectional view of a test device for measuring the sealing pressure of the sealing ring of a slewing bearing according to the present invention.
[0016] Figure 3 It is a schematic front view of applying the present invention to measure the sealing pressure of a seal.
[0017] Figure 4 After removing the left and right sealing pressure test pieces Figure 2 .
[0018] Figure 5 It is Figure 4 a schematic left partial sectional view.
[0019] Figure 6 It is Figure 4 a schematic top partial sectional view.
[0020] Figure 7 It is Figure 4 a schematic rear view. Specific embodiments
[0021] First, refer to Figure 1 , where 1 is an annular seal body, 2 is a mounting portion, 3 is an outer bearing ring, 4 is a sealing groove, 5 is a water sealing limb, 6 is an oil sealing limb, 7 is an inner bearing ring, 8 is a radial surface, and 9 is an axial surface.
[0022] Then, refer to Figure 2 - Figure 7, the test device for measuring the sealing pressure of the sealing ring of the slewing bearing of the present invention has a horizontal test bench 10. A vertical lifting mechanism 20 is fixed on the left side of the test bench, a vertical displacement fixing table 30 installed on the vertical lifting mechanism, and a digital display vertical scale 40 for measuring the vertical displacement generated by the vertical displacement fixing table. A left mounting table 31 with an L-shaped cross-section is formed on the right side of the vertical displacement fixing table 30. A vertical pressure sensor 32 is installed on the horizontal tabletop of the left mounting table; A horizontal moving mechanism 50 is fixed on the right side of the test bench, a horizontal displacement fixing table 60 installed on the horizontal moving mechanism, and a digital display horizontal scale 70 for measuring the horizontal displacement generated by the horizontal displacement fixing table. An upper left side of the horizontal displacement fixing table 60 is formed with a right mounting table 61 corresponding to the cross-sectional shape of the left mounting table 31, that is, the cross-section of the right mounting table is an inverted L-shape. A horizontal pressure sensor 62 is installed on the vertical tabletop of the right mounting table; It also includes left and right sealing pressure test pieces 80 and 90 whose shapes are respectively adapted to the left and right mounting tables 31 and 61 and can respectively abut against the left and right mounting tables. The left sealing pressure test piece 80 at least includes a radial sealing pressure test surface 81 at the top and an axial pressure test surface 82 on the right side. At least a sealing member installation groove 91 is formed on the left side of the right sealing pressure test piece 90. When the sealing member is installed in the installation groove, at least one sealing limb abuts against the radial sealing pressure test surface 81 and the other sealing limb abuts against the axial pressure test surface 82. See Figure 3 , Figure 3It is a front view structural schematic diagram when measuring the sealing pressure of the seal by applying the present invention. In the figure, one sealing limb 2' of the seal 1' abuts against the radial sealing pressure test surface 81, and the other sealing limb 3' abuts against the axial pressure test surface 82. At this time, the right sealing pressure test piece is equivalent to the outer ring of the bearing, the left sealing pressure test piece is equivalent to the inner ring of the bearing, and the seal is equivalent to a section of the rotary bearing seal ring. The radial sealing pressure test surface and the axial pressure test surface are respectively equivalent to the radial surface and the axial surface of the bearing inner ring. The digital display vertical scale 40 includes a vertical scale 41 and a first digital display 42, and the outer wall of the first digital display is fixed on the outer wall of the vertical displacement fixing table 30; the digital display horizontal scale 70 includes a horizontal scale 71 and a second digital display 72, and the outer wall of the second digital display is fixed on the outer wall of the horizontal displacement fixing table 60. The digital display vertical scale and the digital display horizontal scale can be purchased optionally. The vertical lifting mechanism 20 includes a base 21 fixed on the left side of the test bench 10. Vertical columns 22 extending upward are fixed at the front and rear ends of the base. A top cross beam 23 is fixedly connected between the tops of the vertical columns at the front and rear ends. The vertical displacement fixing table 30 is located between the base and the top cross beam. A vertical lead screw 24 is installed at the middle position of the vertical displacement fixing table. The two ends of the vertical lead screw are respectively vertically installed on the base and the top cross beam through bearings 25. The top end of the vertical lead screw extends out of the top cross beam and is equipped with a rotating handwheel 26. Vertical guide columns 27 are also installed at intervals on the vertical displacement fixing table. The upper and lower ends of the vertical guide columns are respectively fixed on the base and the top cross beam. By rotating the rotating handwheel 26, the vertical displacement fixing table can move up and down between the base and the top cross beam. After the outer wall of the first digital display 42 is fixed on the outer wall of the vertical displacement fixing table 30, it can move up and down synchronously with the vertical displacement fixing table. First copper bushings 33 are also installed at intervals on the vertical displacement fixing table 30. The vertical guide columns 27 pass through the first copper bushings and the upper and lower ends are respectively fixed on the base and the top cross beam. The horizontal moving mechanism 50 includes left and right frames 51, 52 fixed on the test bench on the right side of the base 21. The horizontal displacement fixing table 60 is located between the left and right frames. A horizontal lead screw 53 is installed at the lower middle of the horizontal displacement fixing table. The two ends of the horizontal lead screw are respectively horizontally installed on the left and right frames through the bearings 25. The right end of the horizontal lead screw extends out of the right frame and is equipped with the rotating handwheel 26. Horizontal guide columns 54 are also installed at intervals on the horizontal displacement fixing table. The left and right ends of the horizontal guide columns are respectively fixed on the left and right frames. By rotating the rotating handwheel 26, the horizontal displacement fixing table can move horizontally between the left and right frames. After the outer wall of the second digital display 72 is fixed on the outer wall of the horizontal displacement fixing table 60, it can move horizontally synchronously with the horizontal displacement fixing table 60. Second copper bushings 63 are also installed at intervals on the horizontal displacement fixing table 60. The horizontal guide columns 54 pass through the second copper bushings and the left and right ends are respectively fixed on the left and right frames.
[0023] It is understood that the above specific description of the present invention is only for the purpose of illustrating the present invention and is not limited to the technical solutions described in the embodiments of the present invention. Any modification or equivalent replacement of the present invention to achieve the same technical effect falls within the protection scope of the present invention.
Claims
1. A test device for measuring the sealing pressure of the sealing ring of a slewing bearing, characterized in that: There is a horizontal test bench (10). On the left side of the test bench, a vertical lifting mechanism (20), a vertical displacement fixing table (30) mounted on the vertical lifting mechanism, and a digital display vertical scale (40) for measuring the vertical displacement generated by the vertical displacement fixing table are fixed. On the right side of the vertical displacement fixing table (30), a left mounting table (31) with an L-shaped cross-section is formed. A vertical pressure sensor (32) is mounted on the horizontal tabletop of the left mounting table. On the right side of the test bench, a horizontal moving mechanism (50), a horizontal displacement fixing table (60) mounted on the horizontal moving mechanism, and a digital display horizontal scale (70) for measuring the horizontal displacement generated by the horizontal displacement fixing table are fixed. On the upper left side of the horizontal displacement fixing table (60), a right mounting table (61) corresponding to the cross-sectional shape of the left mounting table (31) is formed. A horizontal pressure sensor (62) is mounted on the vertical tabletop of the right mounting table. There are also left and right seal pressure test pieces (80, 90) whose shapes are respectively adapted to the left and right mounting tables (31, 61) and can respectively abut against the left and right mounting tables. The left seal pressure test piece (80) at least includes a radial seal pressure test surface (81) at the top and an axial pressure test surface (82) on the right side. At least a seal mounting groove (91) is formed on the left side of the right seal pressure test piece (90). When the seal is mounted in the mounting groove, at least one seal limb abuts against the radial seal pressure test surface (81), and the other seal limb abuts against the axial pressure test surface (82).
2. The test device for measuring the sealing pressure of the sealing ring of the slewing bearing according to claim 1, wherein: The digital display vertical scale (40) includes a vertical scale (41) and a first digital display (42). The outer wall of the first digital display is fixed on the outer wall of the vertical displacement fixing table (30). The digital display horizontal scale (70) includes a horizontal scale (71) and a second digital display (72). The outer wall of the second digital display is fixed on the outer wall of the horizontal displacement fixing table (60).
3. The test device for measuring the sealing pressure of the sealing ring of a slewing bearing according to claim 1, characterized in that: The vertical lifting mechanism (20) includes a base (21) fixed on the left side of the test bench (10). Vertical columns (22) extending upward are fixed at the front and rear ends of the base. A top cross beam (23) is fixedly connected between the tops of the vertical columns at the front and rear ends. The vertical displacement fixing table (30) is located between the base and the top cross beam. A vertical lead screw (24) is installed at the middle position of the vertical displacement fixing table. The two ends of the vertical lead screw are respectively vertically installed on the base and the top cross beam through bearings (25). The top end of the vertical lead screw extends out of the top cross beam and is equipped with a rotating handwheel (26). Vertical guide columns (27) are also installed at intervals on the vertical displacement fixing table. The upper and lower ends of the vertical guide columns are respectively fixed on the base and the top cross beam. By rotating the rotating handwheel (26), the vertical displacement fixing table can move up and down between the base and the top cross beam.
4. The test device for measuring the sealing pressure of the sealing ring of a slewing bearing according to claim 3, wherein: First copper bushings (33) are also installed at intervals on the vertical displacement fixing table (30). The vertical guide columns (27) pass through the first copper bushings and the upper and lower ends are respectively fixed on the base and the top cross beam.
5. The test device for measuring the sealing pressure of the sealing ring of a slewing bearing according to claim 1, characterized in that: The described horizontal movement mechanism (50) includes left and right frames (51, 52) fixed on the test bench on the right side of the base (21). The horizontal displacement fixing table (60) is located between the left and right frames. A horizontal lead screw (53) is installed at the lower middle of the horizontal displacement fixing table. The two ends of the horizontal lead screw are horizontally installed on the left and right frames respectively through the bearings (25). The right end of the horizontal lead screw extends out of the right frame and is equipped with the rotating handwheel (26). Horizontal guide columns (54) are also installed on the horizontal displacement fixing table at intervals. The left and right ends of the horizontal guide columns are fixed on the left and right frames respectively. By rotating the rotating handwheel (26), the horizontal displacement fixing table can move horizontally between the left and right frames.
6. The test device for measuring the sealing pressure of the sealing ring of a slewing bearing according to claim 5, characterized in that: Second copper bushings (63) are also installed on the horizontal displacement fixing table (60) at intervals. The horizontal guide columns (54) pass through the second copper bushings and the left and right ends are fixed on the left and right frames respectively.