CN102997885B - Gap detection device of large slewing bearing - Google Patents

Abstract

The invention provides a gap detection device of a large slewing bearing and belongs to the technical field of industrial measurement. The gap detection device comprises a radial error detection table, three groups of symmetrically-distributed axial error detection tables, a detection working table frame with a spiral pressing plate clamping mechanism, a slewing bearing to be detected, a controller and a displayer. Each axial error detection table comprises an axial servo motor, an axial rolling guide rail, an axial ball screw, a centering mechanism, an axial screw nut, an axial servo electric pushing rod, an axial working table plate, an axial base and an axial displacement sensor. The radial error detection table comprises a radial servo motor, a locking mechanism, a radial ball screw, a radial rolling guide rail, a radial screw nut, a radial working table plate, a radial servo electric pushing rod, a fork head, a radial base and a radial displacement sensor. The gap detection device of the large slewing bearing has the advantages of being high in detection accuracy, convenient to operate and high in detection efficiency.

Description

Large slewing bearing gap detection device

technical field

The invention belongs to the technical field of industrial measurement, and in particular relates to a large-scale slewing bearing clearance detection device, which is used for detecting the axial and radial clearances of the installed inner and outer rings of the large-diameter slewing support.

Background technique

The axial and radial clearance detection between the inner and outer rings of large slewing bearings has always been a major problem in the industry. At present, the traditional manual detection method is often used: for axial clearance detection, the specific method is to place the slewing bearing on a working platform, and several inspectors use the crowbar to pry the different fulcrums of the inner ring (or outer ring) of the slewing ring at the same time , and then use the dial indicator to measure the height difference at different positions of the end faces of the inner and outer rings of the slewing bearing, and take the average value as its axial clearance; for the detection of the radial clearance, the specific method is to use the inner ring (or outer ring) of the slewing bearing ) is fixed, the inspector manually pushes and pulls the outer ring (or inner ring) of the slewing ring, and then uses the dial indicator to measure the difference in readings in the horizontal direction of the corresponding sides of the inner and outer rings as the radial clearance.

The diameter and weight of large-scale slewing bearings are relatively large. The above-mentioned traditional manual inspection method is not only labor-intensive and inefficient, but also because the inspectors use the dial indicator to record the measurement results manually, there are visual errors and increase. The possibility of accidental errors is greatly increased, making the detection results unreliable.

It can be seen from the above that there is no simple, direct and high-precision method for automatic detection of axial and radial clearances between the inner and outer rings of large slewing bearings.

Contents of the invention

The present invention aims at the above-mentioned problems existing in the prior art, and provides a large-scale slewing bearing gap detection device, which is used to automatically detect the axial and radial clearances of the large-scale slewing bearing inner and outer rings after installation, so as to meet the assembly accuracy requirements of the slewing bearing. The technical solution adopted by the device is to utilize the positioning of the centering mechanism, the feedback of the displacement sensor and the force sensor, and directly display the detection result through the controller and the display composed of the PLC control system.

The large-scale slewing bearing gap detection device provided by the present invention includes a radial gap detection platform, three groups of symmetrically distributed axial gap detection platforms, an outer ring of the slewing bearing to be tested 11, an inner ring of the slewing bearing to be tested 12, and a clamping device including a screw platen. Mechanism detection workbench 13, controller and display; the radial gap detection platform is composed of radial servo motor 1, locking mechanism 2, radial ball screw 3, radial rolling guide rail 4, radial screw nut 5. The radial worktable 6, the radial servo electric push rod 7, the radial machine base 8, the fork 9 and the radial displacement sensor 10; The circumference of the workbench 13 is evenly distributed, and the three groups of symmetrically distributed axial gap detection stations are composed of a base 14, a first axial support 15a, a second axial support 15b, a third axial support 15c, The first servo electric push rod 16a, the second servo electric push rod 16b, the third servo electric push rod 16c, the first axial displacement sensor 17a, the second axial displacement sensor 17b, the third axial displacement sensor 17c, the first Axial table 18a, second axial table 18b, third axial table 18c, first axial screw nut 19a, second axial screw nut 19b, third axial screw nut 19c, first centering mechanism 20a, second centering mechanism 20b, third centering mechanism 20c, first axial rolling guide 21a, second axial rolling guide 21b, third axial rolling guide 21c, first shaft Composed of ball screw 22a, second axial ball screw 22b, third axial ball screw 22c, first axial servo motor 23a, second axial servo motor 23b and third axial servo motor 23c; The control lines of the radial servo motor 1, the first axial servo motor 23a, the second axial servo motor 23b and the third axial servo motor 23c are connected to the controller, the radial displacement sensor 10, the first Axial displacement sensor 17a, the second axial displacement sensor 17b and the 3rd axial displacement sensor 17c are connected with described display device by data line; Described radial ball screw 3 is supported on described radial frame 8 by bearing seat Above, the first axial ball screw 22a, the second axial ball screw 22b and the third axial ball screw 22c are respectively supported on the first axial frame 15a, the second axial On the frame 15b and the third axial frame 15c; one end of the radial ball screw 3 is connected with the radial servo motor 1 through a coupling, the first axial ball screw 22a, the second One end of the axial ball screw 22b and the third axial ball screw 22c are respectively connected to the first axial servo motor 23a, the second axial servo motor 23b and the third axial servo motor 23c through a coupling; The radial workbench 6 is connected to the radial lead screw nut 5 by screws, and the first axial workbench 18a, the second axial workbench 18b and the third axial workbench 18c are respectively Through screws and the first axial lead screw nut 19a, the second axial lead screw nut 1 9b and the third axial lead screw nut 19c are connected; the radial worktable 6 is fixedly connected with the guide rail slider on the radial rolling guide 4 , the first axial worktable 18a, the second shaft The worktable 18b and the third axial worktable 18c are respectively fixedly connected with the guide rail sliders on the first axial rolling guide rail 21a, the second axial rolling guide rail 21b, and the third axial rolling guide rail 21c; The radial servo electric push rod 7 is connected to the radial worktable 6 through a side flange, and a force sensor is arranged at the front end of the radial servo electric push rod 7, and the force sensor is connected to the radial work table through a screw rod and a lock nut. The U-shaped groove on the fork 9 is connected; the pin shaft on the fork 9 is connected with the installation hole on the outer ring 11 of the slewing bearing to be tested, and is used to complete the radial push-pull of the slewing bearing; the first servo motor The push rod 16a, the second servo electric push rod 16b and the third servo electric push rod 16c are connected to the first axial worktable 18a, the second axial worktable 18b and the third axial worktable through the bottom flange The plate 18c is connected, and force sensors are arranged on the top of the first servo electric push rod 16a, the second servo electric push rod 16b and the third servo electric push rod 16c; the radial servo electric push rod 7, the first servo electric push rod The control lines of the rod 16a, the second servo electric push rod 16b and the third servo electric push rod 16c are connected to the controller; the first centering mechanism 20a, the second centering mechanism 20b and the third centering mechanism 20c pass through Screws are connected with the first axial worktable 18 a, the second axial worktable 18 b and the third axial worktable 18 c; the detection workbench 13 is evenly distributed along the circumference of 6, for Complete the supporting and clamping work of the slewing bearing to be tested; the radial base 8, the first axial base 15a, the second axial base 15b, and the third axial base 15c are respectively connected to the base by screws 14 connected.

The fork 9 adopts a quick-change baffle plate with a U-shaped groove structure to meet the requirements for fast installation and disassembly of the fork.

The radial ball screw 3 is provided with a locking mechanism 2. When the radial worktable 6 moves to a predetermined detection position, the locking mechanism 2 is used to instantly lock the radial ball screw 3 to prevent the radial The worktable 6 moves in the radial direction to affect the detection result.

The radial displacement sensor 10 is used to detect the radial clearance between the inner and outer rings of the slewing bearing to be tested; the first axial displacement sensor 17a, the second axial displacement sensor 17b and the third axial displacement sensor 17c are used to detect The axial clearance between the inner and outer rings of the slewing bearing to be tested.

The device is driven by a servo motor, and the ball screw pair drives the worktable to move on the rolling guide rail to meet the detection requirements of slewing bearings with different diameters; the servo electric push rod on the worktable is used to replace manual prying and pushing and pulling , which not only reduces the labor intensity, but also reduces the damage caused by human factors to the slewing bearing; the use of high-precision displacement sensors and multi-point detection methods avoids human visual errors, reduces the possibility of accidental errors, and improves detection accuracy. The detection data is displayed on the monitor in real time in the form of dynamic curves and numbers, and can be stored and printed. The entire detection device is easy to operate and has high detection efficiency.

Description of drawings

Fig. 1: Schematic diagram of the structure of the detection device of the present invention (front view);

Fig. 2: Structural schematic diagram (top view) of detection device of the present invention;

Figure 3: Schematic diagram of the detection process of the axial clearance of the slewing bearing;

Figure 4: Schematic diagram of the detection process of the radial clearance of the slewing bearing.

In the figure: 1-radial servo motor, 2-locking mechanism, 3-radial ball screw, 4-radial rolling guide, 5-radial screw nut, 6-radial table, 7-diameter Directional servo electric push rod, 8-radial base, 9-fork, 10-radial displacement sensor, 11-outer ring of the slewing ring to be tested, 12-inner ring of the slewing ring to be tested, 13-testing workbench, 14-base, 15a-first axial base, 15b-second axial base, 15c-third axial base, 16a-first axial servo electric push rod, 16b-second axial servo Electric push rod, 16c-third axial servo electric push rod, 17a-first axial displacement sensor, 17b-second axial displacement sensor, 17c-third axial displacement sensor, 18a-first axial workbench Plate, 18b-second axial table, 18c-third axial table, 19a-first axial screw nut, 19b-second axial screw nut, 19c-third axial screw Nut, 20a-first centering mechanism, 20b-second centering mechanism, 20c-third centering mechanism, 21a-first axial rolling guide, 21b-second axial rolling guide, 21c-third axial Rolling guide, 22a-first axial ball screw, 22b-second axial ball screw, 22c-third axial ball screw, 23a-first axial servo motor, 23b-second axial servo motor , 23c-the third axial servo motor.

Detailed ways

Example 1: Detection of axial clearance

When the slewing bearing to be tested is an external gear type, first place the slewing bearing to be tested on the detection workbench 13, and the controller drives the first axial servo motor 23a, the second axial servo motor 23b, and the third axial servo motor. The servo motor 23c rotates at the same time, and respectively drives the first centering mechanism 20a, the second centering mechanism 20b, and the third centering mechanism 20c to move simultaneously in the radial direction to complete the centering of the inner ring 12 of the slewing bearing to be tested, and then through the screw platen The clamping mechanism fixes the inner ring 12 of the slewing ring to be tested on the detection workbench 13, and at this time, the outer ring 11 of the slewing ring to be tested naturally sags under the action of its own weight. Fix the fixed end of the axial displacement sensor 17 on the upper surface of the inner ring 12 of the slewing bearing to be tested, and the measuring head of the axial displacement sensor 17 points to the upper surface of the outer ring 11 of the slewing bearing to be tested. At this time, the reading of the displacement sensor is calibrated to zero (see Figure 3a). Then the controller drives the first axial servo electric push rod 16a, the second axial servo electric push rod 16b, and the third axial servo electric push rod 16c to simultaneously lift up the outer ring 11 of the slewing bearing to be tested, at a certain top Under the action of the boost pressure, the outer ring 11 of the slewing bearing to be tested is raised to the maximum due to the axial clearance, and the reading of the displacement sensor 17 at this time is the axial clearance value H at the measuring point (see Figure 3b). Through the multiple detection results of three uniformly distributed measuring points, the average value is taken as the axial gap detection value between the inner and outer rings of the slewing bearing to be tested, and the detection results are output on the display in real time.

When the slewing bearing to be tested is an internal gear type, the detection principle of the axial clearance is similar to that of the external gear type slewing bearing.

Embodiment 2: Detection of Radial Clearance

When the slewing bearing to be tested is an external gear type, first place the slewing bearing to be tested on the detection workbench 13, and the controller drives the first axial servo motor 23a, the second axial servo motor 23b, and the third axial servo motor. The servo motor 23c rotates at the same time, and respectively drives the first centering mechanism 20a, the second centering mechanism 20b, and the third centering mechanism 20c to move simultaneously in the radial direction to complete the centering of the inner ring 12 of the slewing bearing to be tested, and then through the screw platen The clamping mechanism fixes the inner ring 12 of the slewing bearing to be tested on the testing workbench 13 . The radial servo motor 1 is driven by the controller, and when the radial worktable 6 is driven by the radial ball screw 3 and the radial screw nut 5 to move to the detection position on the radial rolling guide rail 4, the locking mechanism 2 is used to lock the The radial workbench 6 is locked. Fix the fixed end of the radial displacement sensor 10 on the upper surface of the inner ring 12 of the slewing ring to be tested, and the probe of the axial displacement sensor 10 points to the side of the outer ring 11 of the slewing ring to be tested (see FIG. 4 ). The fork 9 pushes the outer ring 11 of the slewing bearing to be tested horizontally inward under the action of the radial servo electric push rod 7. At this time, the reading of the calibrated radial displacement sensor 10 is zero, and then the fork 9 is pushed inward by the radial servo electric push rod. Under the action of the rod 7, the outer ring 11 of the slewing ring to be tested is pulled horizontally outward, and the reading of the radial displacement sensor 10 at this time is the radial gap value L between the inner and outer rings of the slewing ring to be tested at the measuring point (see Fig. 4). Select multiple measuring points for repeated measurement, take the average value as the radial clearance detection value between the inner and outer rings of the slewing bearing to be tested, and output the detection results on the display in real time.

  When the slewing bearing to be tested is an internal gear type, the detection principle of the radial clearance is similar to that of the external gear type slewing bearing. the

Claims (3)

1. A large-scale slewing bearing gap detection device, which is characterized in that the device includes a radial gap detection platform, three groups of symmetrically distributed axial gap detection platforms, an outer ring of the slewing ring to be tested (11), an inner ring of the slewing ring to be tested (12 ), a detection workbench (13), a controller and a display containing a screw platen clamping mechanism; the radial gap detection platform is composed of a radial servo motor (1), a locking mechanism (2), a radial ball screw (3), radial rolling guide (4), radial screw nut (5), radial worktable (6), radial servo electric push rod (7), radial base (8), fork (9) and a radial displacement sensor (10); said three groups of symmetrically distributed axial gap detection platforms are evenly distributed along the circumference of said detection workbench (13), and said three groups of symmetrically distributed axial gaps The detection platform consists of a base (14), a first axial support (15a), a second axial support (15b), a third axial support (15c), a first servo electric push rod (16a), a second Two servo electric push rods (16b), the third servo electric push rod (16c), the first axial displacement sensor (17a), the second axial displacement sensor (17b), the third axial displacement sensor (17c), the first An axial worktable (18a), a second axial worktable (18b), a third axial worktable (18c), a first axial lead screw nut (19a), a second axial lead screw nut (19b), the third axial screw nut (19c), the first centering mechanism (20a), the second centering mechanism (20b), the third centering mechanism (20c), the first axial rolling guideway (21a ), the second axial rolling guide (21b), the third axial rolling guide (21c), the first axial ball screw (22a), the second axial ball screw (22b), the third axial ball screw Bar (22c), the first axial servo motor (23a), the second axial servo motor (23b) and the third axial servo motor (23c); the radial servo motor (1), the first axial The control lines of the servo motor (23a), the second axial servo motor (23b) and the third axial servo motor (23c) are connected to the controller, the radial displacement sensor (10), the first axial displacement The sensor (17a), the second axial displacement sensor (17b) and the third axial displacement sensor (17c) are connected to the display through a data line; the radial ball screw (3) is supported by a bearing seat on the On the radial frame (8), the first axial ball screw (22a), the second axial ball screw (22b) and the third axial ball screw (22c) are respectively supported by bearing housings The first axial frame (15a), the second axial frame (15b) and the third axial frame (15c); one end of the radial ball screw (3) is connected to the The radial servo motor (1) is connected, and one end of the first axial ball screw (22a), the second axial ball screw (22b) and the third axial ball screw (22c) are respectively passed through the shaft coupling tor with the first axial servo motor ( 23a), the second axial servo motor (23b) and the third axial servo motor (23c); the radial worktable (6) is connected with the radial lead screw nut (5) by screws, and the The first axial workbench (18a), the second axial workbench (18b) and the third axial workbench (18c) are respectively connected with the first axial lead screw nut (19a), The second axial lead screw nut (19b) and the third axial lead screw nut (19c) are connected; the radial worktable (6) is fixedly connected with the guide rail slide block on the radial rolling guide rail (4) , the first axial worktable (18a), the second axial worktable (18b) and the third axial worktable (18c) are respectively connected with the first axial rolling guide rail (21a), the second axial worktable The guide rail sliders on the second axial rolling guide rail (21b) and the third axial rolling guide rail (21c) are fixedly connected; the radial servo electric push rod (7) is connected to the radial worktable ( 6) connected, the front end of the radial servo electric push rod (7) is arranged with a force sensor, and the force sensor is connected with the U-shaped groove on the fork (9) through a screw rod and a lock nut; the fork The pin shaft on (9) is connected with the mounting hole on the outer ring (11) of the slewing bearing to be tested, and is used to complete the radial push-pull of the slewing bearing; the first servo electric push rod (16a), the second servo electric push rod The rod (16b) and the third servo electric push rod (16c) pass through the bottom flange and the first axial worktable (18a), the second axial worktable (18b) and the third axial worktable (18c) are connected; the tops of the first servo electric push rod (16a), the second servo electric push rod (16b) and the third servo electric push rod (16c) are arranged with force sensors; the radial servo electric push rod (7), the control lines of the first servo electric push rod (16a), the second servo electric push rod (16b) and the third servo electric push rod (16c) are connected to the controller; the first centering mechanism (20a ), the second centering mechanism (20b) and the third centering mechanism (20c) are respectively connected with the first axial worktable (18a), the second axial worktable (18b) and the third shaft through screws It is connected to the worktable (18c); the detection workbench (13) is evenly distributed along the circumference of 6, and is used to complete the support and clamping work of the slewing bearing to be tested; the radial machine base (8), the first An axial frame (15a), a second axial frame (15b), and a third axial frame (15c) are respectively connected to the base (14) through screws. 2. The detection device according to claim 1, characterized in that the fork (9) adopts a quick-change baffle plate with a U-shaped groove structure. 3. The detection device according to claim 1, characterized in that the radial ball screw (3) is provided with a locking mechanism (2).