A large slewing bearing radial runout testing device

Abstract

This invention provides a radial runout testing device for large slewing bearings, belonging to the field of slewing bearing testing technology. It includes a support assembly, a lifting assembly, a slewing assembly, and a testing assembly. The mounting end of the support assembly is connected to the non-testing surface of the large slewing bearing to be tested, and the testing end of the testing assembly is connected to the testing surface of the large slewing bearing to be tested through contact. This invention supports the large slewing bearing to be tested by setting up a support assembly, and through the cooperation of the lifting assembly, slewing assembly, and testing assembly, detects the radial runout clearance of the large slewing bearing to be tested. This solves the inaccuracy of the traditional method of measuring radial clearance using feeler gauges, provides a reference for the radial clearance design value, and allows for timely correction of the outer ring or rolling elements if the data differs significantly.

Description

Technical Field

[0001] This utility model belongs to the field of slewing bearing testing technology, and relates to a large slewing bearing radial runout testing device. Background Technology

[0002] The conventional method for measuring the radial clearance of large slewing bearings involves measuring the clearance between the radial rolling elements and the internal gear ring using a feeler gauge after the first outer ring and inner ring of the bearing are assembled, and then taking the average value after multiple measurements. This method cannot accurately and systematically reflect the radial clearance value of the bearing, resulting in a certain error compared to the design value, which ultimately affects the assembly result. Therefore, those skilled in the art have provided a device and method for testing the radial runout of large slewing bearings to solve the problems mentioned in the background art.

[0003] When measuring the radial clearance of large slewing bearings, feeler gauges are often used to measure the gap between the radial rolling elements and the raceway. This measurement method is only applicable when the raceway is not fully assembled, and the measured radial clearance is greatly affected by the placement of the inner raceway. Using feeler gauges for multi-point measurements alone cannot accurately measure the radial clearance value, ultimately making it impossible to compare with the design value, which will seriously affect the performance of the entire product. Utility Model Content

[0004] This utility model provides a large slewing bearing radial runout testing device, including a support assembly, a lifting assembly, a slewing assembly, and a detection assembly; The support assembly is used to support the large slewing bearing to be tested; and the support assembly includes a support base, a guide rail assembly disposed on the support base, and a slide rail disposed on the guide rail assembly; The lifting assembly is used to lift the large slewing bearing to be tested; and the lifting assembly includes a slider that is slidably connected to the slide rail and a second driving member mounted on the slider. The fixed end of the second driving member is fixedly connected to the slider, and the driving end of the second driving member extends away from the slider along the height direction to drive the large slewing bearing to be tested to move along the height direction. The slewing assembly is used to drive the large slewing bearing to be tested to rotate; and the slewing assembly includes a gear and a first driving member for driving the gear to rotate. The fixed end of the first driving member is fixedly connected to the support base, and the driving end of the first driving member is fixedly connected to the gear. The gear meshes with the internal gear ring of the large slewing bearing to be tested. The mounting end of the detection component is connected to the non-detection surface of the large slewing bearing to be tested, and the detection end of the detection component is connected to the detection surface of the large slewing bearing to be tested in a contact manner, for detecting the radial runout of the large slewing bearing to be tested.

[0005] Optionally, the guide rail assembly includes a first support guide rail, a second support guide rail, and a third support guide rail; The first support guide rail consists of two pieces spaced apart along the length of the support base, and the two first support guide rails are symmetrically arranged along the central axis of the width of the support base. The second support guide rail has two pieces arranged in a circular array along the center position of the support base, and there is a gap between the two second support guide rails at their close ends and both are simultaneously connected to the first support guide rail and the third support guide rail. The third support rail has two pieces arranged circumferentially along the center of the support base, and there is a gap between the two third support rails at their close ends and both are simultaneously connected to the first support rail and the second support rail. Slide rails are provided on the first support rail, the second support rail, and the third support rail.

[0006] Optionally, the single-piece first support guide rail and the single-piece second support guide rail, as well as the single-piece second support guide rail and the single-piece third support guide rail, are set at an angle of 20°-80°.

[0007] Optionally, a first guide member is also provided on each of the single-piece first support guide rail, single-piece second support guide rail, and single-piece third support guide rail; Both the slider and the gear are provided with guide grooves that cooperate with the guide components.

[0008] Furthermore, the large slewing bearing radial runout testing device also includes a shifting component respectively disposed on the side end face of the first support guide rail and on the side end face of the second support guide rail, the shifting component being used to swap the positions of the lifting component and the slewing component.

[0009] Optionally, the shifting component is located at the center of the support base, and the shifting component includes a third driving component, a fourth support guide rail, and a limiting component; The fixed end of the third driving component is fixedly connected to the support base, and the driving end of the third driving component is fixedly connected to the fourth support guide rail, which is used to drive the fourth support guide rail to rotate. A limiting member is provided at the center of the fourth support rail, which divides the fourth support rail into two segments that are not connected to each other.

[0010] Optionally, a second guide member is also provided on the fourth support guide rail, and the structure of the second guide member is the same as that of the first guide member.

[0011] Optionally, the end face of the support base for mounting the guide rail assembly is further provided with a plurality of grooves spaced apart from each other.

[0012] Optionally, the detection assembly includes a detection element and a magnetic base connected to each other. The detection element is configured as a dial indicator. The magnetic base is connected to the non-detection surface of the large slewing bearing to be tested. The pointer of the dial indicator is in contact with the detection surface of the large slewing bearing to be tested.

[0013] Compared with the prior art, the present invention has the following beneficial effects: (1) This utility model supports the large slewing bearing to be tested by setting up a support component, and detects the radial runout clearance of the large slewing bearing to be tested by the cooperation of the lifting component, the slewing component and the detection component. This solves the inaccuracy of the traditional method of measuring radial clearance with feeler gauges, and provides a reference for the design value of radial clearance. If the data differs greatly, the outer ring or rolling element can be corrected in time.

[0014] (2) This utility model sets up three sets of support guide rails (first support guide rail, second support guide rail and third support guide rail), and uses a displacement component to adjust the relative positions of the lifting component and the slewing component on the large slewing bearing to be tested, and cooperates with a movable detection component to detect six sets of radial clearances on the same large slewing bearing to be tested. Then, it calculates the actual radial clearance value through the six sets of radial clearances, which effectively improves the accuracy of the measurement results. At the same time, it avoids the problem of multiple hoisting during the testing process and improves the testing efficiency.

[0015] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The present utility model will now be described in further detail with reference to the figures. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings: Figure 1 This is a schematic diagram of the structure of a large slewing bearing radial runout testing device according to an embodiment of this utility model.

[0017] in: 01. Large slewing bearing to be tested, 1. Support base, 2. First support guide rail, 3. Second support guide rail, 4. Third support guide rail, 5. Slide rail, 6. Gear, 7. Slider, 8. Detection element, 9. First guide component, 10. Positioning assembly. Detailed Implementation

[0018] To make the above-mentioned objectives, features, and advantages of this utility model clearer and easier to understand, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be noted that the accompanying drawings of this utility model are all in a simplified form and use non-precise proportions, and are only used to facilitate and clearly assist in illustrating the implementation of this utility model; the "several" mentioned in this utility model are not limited to the specific number shown in the examples in the drawings; the directions or positional relationships indicated by "front," "middle," "rear," "left," "right," "up," "down," "top," "bottom," and "middle" mentioned in this utility model are all based on the directions or positional relationships shown in the accompanying drawings of this utility model, and do not indicate or imply that the device or component referred to must have a specific orientation, nor should they be construed as limitations on this utility model.

[0019] Example: See Figure 1 As shown, the large slewing bearing radial runout testing device provided by this utility model includes a support assembly, a lifting assembly, a slewing assembly, and a detection assembly; The support assembly is used to support the large slewing bearing 01 to be tested; and the support assembly includes a support base 1, a guide rail assembly disposed on the support base 1, and a slide rail 5 disposed on the guide rail assembly; The lifting assembly is used to lift the large slewing bearing 01 to be tested; and the lifting assembly includes a slider 7 slidably connected to the slide rail 5 and a second driving member installed on the slider 7. The fixed end of the second driving member is fixedly connected to the slider 7, and the driving end of the second driving member extends away from the slider 7 along the height direction, for driving the large slewing bearing 01 to be tested to move along the height direction. The rotary assembly is used to drive the large rotary bearing 01 to be tested to rotate; and the rotary assembly includes a gear 6 and a first driving member for driving the gear 6 to rotate. The fixed end of the first driving member is fixedly connected to the support base 1, and the driving end of the first driving member is fixedly connected to the gear 6. The gear 6 meshes with the internal gear ring of the large rotary bearing 01 to be tested. The detection component is used to detect the radial runout of the large slewing bearing 01 to be tested.

[0020] Preferably, the guide rail assembly includes a first support guide rail 2, a second support guide rail 3, and a third support guide rail 4; The first support guide rail 2 consists of two pieces that are spaced apart from each other, and the two first support guide rails 2 are symmetrically arranged along the central axis of the width direction of the support base 1; The second support rail 3 has two pieces arranged in a circular array along the center position of the support base 1, and there is a gap between the two second support rails 3 at their close ends and both are connected to the first support rail 2 and the third support rail 4 at the same time. The third support rail 4 has two pieces arranged circumferentially along the center of the support base 1, and there is a gap between the two third support rails 4 at their close ends and both are simultaneously connected to the first support rail 2 and the second support rail 3. Slide rails 5 are provided on the first support rail 2, the second support rail 3 and the third support rail 4.

[0021] Further preferably, the slide rail 5 is preferably configured as a C-shaped slide rail 5 structure; the first support guide rail 2, the second support guide rail 3 and the third support guide rail 4 are all preferably configured as I-beam steel structures; the end face of the support base 1 for mounting the guide rail assembly is also provided with a plurality of grooves spaced apart from each other, and multiple locking parts for locking and fixing to the first support guide rail 2, the second support guide rail 3 and the third support guide rail 4 respectively can be placed in the grooves according to actual needs.

[0022] Further preferably, the single-piece first support guide rail 2 and the single-piece second support guide rail 3, as well as the single-piece second support guide rail 3 and the single-piece third support guide rail 4, are all set at an angle of 20°-80° to facilitate uniform support for the large slewing bearing 01 to be tested. Specifically, the single-piece first support guide rail 2 and the single-piece second support guide rail 3, as well as the single-piece second support guide rail 3 and the single-piece third support guide rail 4, are preferably set at an angle of 60°.

[0023] Preferably, the first driving component is any one of a motor, a rotary hydraulic cylinder, or a rotary pneumatic cylinder; the second driving component is any one or a combination of telescopic driving structures such as a telescopic hydraulic cylinder, a telescopic pneumatic cylinder, or a hydraulic jack.

[0024] Further preferably, each of the single-piece first support guide rail 2, single-piece second support guide rail 3, and single-piece third support guide rail 4 is provided with a first guide member 9; each of the slider 7 and gear 6 is provided with a guide groove that cooperates with the guide member. Even more preferably, the guide member is configured as a guide rod respectively disposed on the side end face of the first support guide rail 2 and the side end face of the second support guide rail 3, or, preferably, the guide member is configured as a protruding guide portion respectively disposed on the side end face of the first support guide rail 2 and the side end face of the second support guide rail 3, the guide rod or the protruding guide portion extending along the length direction of the first support guide rail 2 or the second support guide rail 3. Furthermore, to better achieve guidance, guide rods or protruding guide portions are provided on two side end faces of the first support guide rail 2 parallel to each other along its length direction and on two side end faces of the second support guide rail 3 parallel to each other along its length direction.

[0025] Preferably, the detection element 8 is configured as a dial indicator, and a magnetic base is also provided on the dial indicator.

[0026] As a further embodiment of the present invention, the large slewing bearing radial runout testing device also includes a shifting component 10 respectively disposed on the side end face of the first support guide rail 2 and on the side end face of the second support guide rail 3. The shifting component 10 is used to swap the positions of the lifting component and the slewing component.

[0027] Preferably, the shifting component 10 is disposed at the center of the support base 1, and the shifting component 10 includes a third driving member, a fourth support guide rail and a limiting member; The fixed end of the third driving component is fixedly connected to the support base 1, and the driving end of the third driving component is fixedly connected to the fourth support guide rail, which is used to drive the fourth support guide rail to rotate. A limiting member is provided at the center of the fourth support rail, which divides the fourth support rail into two segments that are not connected to each other.

[0028] Further preferably, a second guide member is provided on the fourth support guide rail, and the second guide member has the same structure as the first guide member 9; the third drive member is preferably set as any one of a rotary table, a rotary motor, a rotary hydraulic cylinder or a rotary pneumatic cylinder.

[0029] The specific process for detecting the radial runout of a large slewing bearing using the aforementioned large slewing bearing radial runout testing device is as follows: Step 1: Place the first outer ring of the large slewing bearing to be tested face down on the support assembly; Step 2: Activate the second driving component (preferably a hydraulic jack in this embodiment) to extend and lift the first outer ring end face of one side of the large slewing bearing to be tested by 3mm-5mm, so that the large slewing bearing to be tested is in a slightly tilted state. Step 3: After connecting the dial indicator and the magnetic base, fix them to the second outer ring of the large slewing bearing to be tested by the magnetic force of the magnetic base, and fix the pointer of the dial indicator at the stop of the gear ring surface in the large slewing bearing to be tested. Step 4: Start the first drive unit to make the gear and the gear ring in the large slewing bearing to be tested rotate clockwise. At the same time, the dial indicator starts to record the first set of runout data at the stop of the gear ring surface. Step 5: After the gear ring has rotated five times, calculate the average runout value of the first set based on all the recorded runout data; Step 6: Stop the first drive unit, then depressurize the hydraulic jack, and use the switching component to exchange the positions of the slewing component and the lifting component. Step 7: Repeat steps 4 and 5 to obtain the average value of the second set of jumps; Step 8: Subtract the average jump value of the first group from the average jump value of the second group; Step 9: Stop the first drive unit and depressurize the hydraulic jack; start the switching component to move the slewing component and the lifting component from the first support rail to the second support rail; repeat steps 4 to 8 to obtain the third set of average runout values ​​and the fourth set of average runout values. Step 10: Stop the first drive unit and depressurize the hydraulic jack; start the switching component to move the slewing component and the lifting component from the second support rail to the third support rail; repeat steps 4 to 8 to obtain the fifth set of average runout values ​​and the sixth set of average runout values. Step 11: Take the average value of the first group of runout average value, the second group of runout average value, the third group of runout average value, the fourth group of runout average value, the fifth group of runout average value, and the sixth group of runout average value to obtain the radial clearance of the current large slewing bearing.

[0030] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A radial runout testing device for a large slewing bearing, characterized in that, Includes support components, lifting components, slewing components, and detection components; The support assembly is used to support the large slewing bearing (01) to be tested; and the support assembly includes a support base (1), a guide rail assembly disposed on the support base (1), and a slide rail (5) disposed on the guide rail assembly. The lifting assembly is used to lift the large slewing bearing (01) to be tested; and the lifting assembly includes a slider (7) slidably connected to the slide rail (5) and a second driving member installed on the slider (7). The fixed end of the second driving member is fixedly connected to the slider (7), and the driving end of the second driving member extends away from the slider (7) along the height direction to drive the large slewing bearing (01) to be tested to move along the height direction. The rotary assembly is used to drive the large slewing bearing (01) to be tested to rotate; and the rotary assembly includes a gear (6) and a first driving member for driving the gear (6) to rotate. The fixed end of the first driving member is fixedly connected to the support base (1), and the driving end of the first driving member is fixedly connected to the gear (6). The gear (6) meshes with the internal gear ring of the large slewing bearing (01) to be tested. The mounting end of the detection component is connected to the non-detection surface of the large slewing bearing (01) to be tested, and the detection end of the detection component is connected to the detection surface of the large slewing bearing (01) to be tested in a contact manner, for detecting the radial runout of the large slewing bearing (01) to be tested.

2. The radial runout testing device for large slewing bearings according to claim 1, characterized in that, The guide rail assembly includes a first support guide rail (2), a second support guide rail (3) and a third support guide rail (4). The first support rail (2) consists of two pieces that are spaced apart from each other along the length of the support base (1), and the two first support rails (2) are symmetrically arranged along the central axis of the width of the support base (1). The second support rail (3) has two pieces arranged in a circular array along the center position of the support base (1), and the two second support rails (3) are spaced apart at their close ends and are simultaneously connected to the first support rail (2) and the third support rail (4); The third support rail (4) has two pieces arranged in a circle around the center of the support base (1), and there is a gap between the two third support rails (4) at their closest ends and both are connected to the first support rail (2) and the second support rail (3) at the same time. Slide rails (5) are provided on the first support rail (2), the second support rail (3) and the third support rail (4).

3. The radial runout testing device for large slewing bearings according to claim 2, characterized in that, The single first support rail (2) and the single second support rail (3) are set at an angle of 20°-80°, as are the single second support rail (3) and the single third support rail (4).

4. The radial runout testing device for large slewing bearings according to claim 2, characterized in that, A first guide member (9) is also provided on the single first support guide rail (2), the single second support guide rail (3) and the single third support guide rail (4); Both the slider (7) and the gear (6) are provided with guide grooves that cooperate with the guide components.

5. The radial runout testing device for large slewing bearings according to any one of claims 1-4, characterized in that, It also includes a shifting component (10) respectively disposed on the side end face of the first support guide rail (2) and on the side end face of the second support guide rail (3), the shifting component (10) being used to swap the positions of the lifting component and the slewing component.

6. The radial runout testing device for large slewing bearings according to claim 5, characterized in that, The shifting component (10) is located at the center of the support base (1), and the shifting component (10) includes a third driving member, a fourth support guide rail and a limiting member; The fixed end of the third driving component is fixedly connected to the support base (1), and the driving end of the third driving component is fixedly connected to the fourth support rail, which is used to drive the fourth support rail to rotate. A limiting member is provided at the center of the fourth support rail, which divides the fourth support rail into two segments that are not connected to each other.

7. The radial runout testing device for large slewing bearings according to claim 6, characterized in that, A second guide is also provided on the fourth support rail, and the structure of the second guide is the same as that of the first guide (9).

8. The radial runout testing device for large slewing bearings according to claim 6 or 7, characterized in that, The support base (1) has several grooves spaced apart from each other on its end face for mounting the guide rail assembly.

9. The radial runout testing device for large slewing bearings according to claim 8, characterized in that, The detection assembly includes a detection element (8) and a magnetic base connected to each other. The detection element (8) is configured as a dial indicator. The magnetic base is connected to the non-detection surface of the large slewing bearing (01) to be tested. The pointer of the dial indicator is connected to the detection surface of the large slewing bearing (01) to be tested in a contact manner.

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