A kind of super large rotary table bearing axial gap detection device

Abstract

The utility model relates to a kind of super-large rotary table bearing axial clearance detection devices of bearing detection technical field, comprising: fixed base, its top is evenly ringed with at least three radial slide rail beams in circumferential direction;At least three sliding support blocks, one-to-one slidingly connected in the radial slide rail beam;The sliding support block includes first support part, second support part and jacking equipment, the second support part is vertically slidingly connected to the first support part, and is located in the first support part side close to or away from the fixed base, and the jacking equipment drives the second support part to support the outer ring or inner ring of the bearing to be measured.The utility model is by setting the second support part and jacking equipment that can vertically lift on each sliding support block, using jacking action makes bearing inner and outer rings occur relative displacement in axial under the action of its own gravity, to detect axial clearance in single attitude can be completed.

Description

Technical Field

[0001] This utility model relates to the field of bearing testing technology, and in particular to a device for detecting the axial clearance of an extra-large turntable bearing. Background Technology

[0002] As a core rotating component capable of simultaneously bearing axial loads, radial loads, and overturning moments, slewing bearings typically have large diameters (generally exceeding 3 meters in outer diameter, and sometimes even reaching tens of meters). Their performance directly affects the operational accuracy, stability, and service life of the entire equipment. Among these parameters, axial clearance (also known as axial runout) is a key technical parameter for evaluating the manufacturing and assembly quality of extra-large slewing bearings. Its size has a decisive impact on the bearing's rotational accuracy, rigidity, vibration noise, and service life. Therefore, accurate and reliable detection of axial clearance is crucial during bearing assembly at the factory and during equipment maintenance.

[0003] Currently, relatively mature devices and methods exist for axial clearance testing of small and medium-sized bearings. However, the testing of the aforementioned extra-large slewing bearings faces many unique challenges. Traditional testing methods often rely on manual operation and simple tooling, resulting in high labor intensity, low measurement accuracy, and poor repeatability. Although some testing devices specifically designed for large bearings have emerged in the existing technology, for example, Chinese Patent Publication No. CN221173229U discloses a device for testing the axial clearance of large double-row tapered roller bearings. This technical solution improves the measurement method to some extent, but still has the following obvious drawbacks: 1. During the testing process, the bearing and the entire measuring device need to be rotated 180 degrees to complete bidirectional measurement. However, extra-large bearings and their supporting testing devices are extremely heavy and bulky. Performing a 180-degree flipping operation not only requires large lifting equipment but also poses a high safety risk and is extremely inconvenient to operate, severely restricting testing efficiency. 2. During the flipping process, fixed measuring instruments (such as dial indicators or micrometers) are easily displaced due to vibration or impact, causing the measurement reference to fail, thereby introducing significant measurement errors and even leading to incorrect test results.

[0004] To address this, we designed an axial clearance detection device for extra-large slewing bearings. Utility Model Content

[0005] To overcome the shortcomings of the prior art, this utility model discloses an axial clearance detection device for extra-large turntable bearings.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An axial clearance detection device for extra-large slewing bearings includes:

[0008] A fixed base, the top of which is uniformly provided with at least three radial slide rail beams along the circumference;

[0009] At least three sliding support blocks are slidably connected to the radial slide rail beam in a one-to-one correspondence; each sliding support block includes a first support part, a second support part, and a lifting device. The second support part is vertically slidably connected to the first support part and is located on the side of the first support part that is close to or far from the fixed base. The lifting device drives the second support part to push against the outer or inner ring of the bearing under test, so that the inner or outer ring of the bearing under test is disengaged from the support of the first support part.

[0010] The test gauge has its base fixedly installed on the outer or inner ring of the bearing to be tested, and its head abuts against the top surface of the inner or outer ring of the bearing to be tested.

[0011] Furthermore, the first support portion has an upwardly extending radial stop portion on the side opposite to the second support portion.

[0012] Furthermore, the top surface of the first support portion is provided with a radial groove; the radial stop portion includes:

[0013] A fixed baffle is provided on the side of the first support portion away from the second support portion;

[0014] A movable baffle is slidably connected to the radial groove;

[0015] An adjusting bolt passes through the fixed baffle and connects to the movable baffle to adjust the position of the movable baffle.

[0016] Furthermore, one end of the adjusting bolt is fixedly connected to the movable baffle and is adjustablely fixed to the fixed baffle by a nut.

[0017] Furthermore, one end of the adjusting bolt is rotatably connected to the movable baffle and threadedly fitted to the fixed baffle.

[0018] Furthermore, the fixed base is hollow inside and is equipped with a lifting device. The sliding support block is rotatably connected to the lifting part of the lifting device through a connecting rod. The fixed base has a vertical clearance notch on the side wall corresponding to the radial slide rail beam.

[0019] Furthermore, a pin seat is provided at the bottom of the first support part, and the connecting rod is rotatably connected to the first support part through the pin seat.

[0020] Furthermore, the outer end of the radial slide rail beam is provided with a support column.

[0021] Compared with the prior art, the beneficial effects of this utility model are:

[0022] 1. By setting a vertically lifting second support and a lifting device on each sliding support block, the inner and outer rings of the bearing are axially displaced relative to each other under their own gravity by the lifting action. Thus, the axial clearance can be detected in a single posture. This fundamentally solves the problem of having to rotate the bearing and measuring device 180 degrees as a whole in the existing technology, significantly reduces the operation intensity and safety risks, and greatly improves the detection efficiency.

[0023] 2. By setting a radial stop on the first support part, especially the combination of an adjustable movable baffle and a fixed baffle, the bearings of different sizes can be precisely radially limited, preventing the bearings from moving horizontally during the measurement process, ensuring the smoothness of the testing process, and ensuring that the center position of the bearing is consistent in each measurement, which greatly improves the repeatability and consistency of multiple measurement results.

[0024] 3. Through the lifting device and linkage mechanism set inside the fixed base, all sliding support blocks can be driven to open or close synchronously and automatically along the radial slide rail beam, so that the equipment can quickly adapt to bearings of different diameters. During the loading and unloading process, there is no need to manually adjust the heavy support blocks one by one, which not only saves time and effort, but also eliminates the position uncertainty caused by manual adjustment, further ensuring the uniformity of measurement conditions. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of this utility model;

[0026] Figure 2 This is a cross-sectional view of the present invention;

[0027] Figure 3 for Figure 2 Enlarged view of part I in the image;

[0028] Figure 4 This is a schematic diagram of the sliding support block in this utility model.

[0029] In the diagram: 1. Fixed base; 11. Clearance notch; 2. Radial slide rail beam; 3. Sliding support block; 31. First support part; 311. Radial slide groove; 32. Second support part; 33. Lifting device; 34. Radial stop part; 341. Fixed baffle; 342. Movable baffle; 343. Adjusting bolt; 35. Pin seat; 4. Inspection gauge; 5. Lifting device; 6. Connecting rod; 7. Support column. Detailed Implementation

[0030] The present invention can be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention. In the description of the present invention, it should be understood that if terms such as "upper", "lower", "front", "rear", "left", "right" indicate orientation or positional relationship, they are only corresponding to the drawings of this application for the convenience of describing the present invention. It should be understood that if terms such as "end", "side", "end portion", "side part", "lateral", "longitudinal", etc. indicate orientation or positional relationship, they are only corresponding to the length and width of the corresponding component. That is, "end" indicates the head and tail area in the length direction of the corresponding component, and "side part" indicates the head and tail area in the width direction of the corresponding component. They are for the convenience of describing the present invention and do not indicate or imply that the device or element referred to must have a specific orientation.

[0031] Example 1, in conjunction with Appendix Figure 1-4 An axial clearance detection device for extra-large slewing bearings is provided for situations where the inner ring end face of the bearing is located axially outside or on the same side as the outer ring end face, ensuring that when the inner ring of the bearing abuts against the first support part 31, the outer ring of the bearing does not contact the second support part 32. It includes a fixed base 1, a sliding support block 3, and a detection gauge 4.

[0032] The fixed base 1 serves as the mounting foundation for the entire device, and its top is uniformly provided with at least three radial slide rail beams 2 along the circumference. These radial slide rail beams 2 provide a track for the radial movement of the sliding support block 3. To further enhance structural stability, support columns 7 can be installed at the outer ends of the radial slide rail beams 2 and fixed to the ground or other foundation structures.

[0033] The number of sliding support blocks 3 corresponds to the radial slide rail beams 2, and they are slidably connected to them one by one. Each sliding support block 3 includes a first support part 31, a second support part 32, and a lifting device 33.

[0034] In this embodiment, the bottom of the first support portion 31 is typically provided with a slider to accommodate sliding on the radial slide rail beam 2. The second support portion 32 is vertically slidably connected to the side of the first support portion 31 away from the fixed base 1 via a guide rail structure.

[0035] The lifting device 33, such as but not limited to a hydraulic cylinder, an electric push rod, or a screw jack, is installed on the first support part 31, and its power output end is connected to the second support part 32 to drive the second support part 32 to rise and fall vertically.

[0036] The test gauge 4 is preferably a dial indicator or a micrometer, whose base is magnetically attached to the outer or inner ring of the bearing to be tested, and whose head abuts against the top surface of the inner or outer ring of the bearing to be tested.

[0037] As needed, multiple test tables 4 can be set and evenly distributed along the circumference of the bearing to be tested during use.

[0038] The working principle is as follows:

[0039] Loading and positioning: The extra-large turntable bearing is hoisted onto the device, with its inner ring supported by the first support part 31 of multiple sliding support blocks 3. By radially moving each sliding support block 3, it slides along the radial slide rail beam 2 to a suitable support position to accommodate bearings of different sizes.

[0040] Install the test gauge 4, and use the magnetic force of the gauge base to attach it to the outer or inner ring of the bearing to be tested. The gauge head will then contact the top surface of the inner or outer ring of the bearing to be tested to take the first reading n.

[0041] Lifting and Separation: Start the lifting device 33 on each sliding support block 3 to make all the lifting devices 33 operate synchronously and drive the second support part 32 to rise, support the outer ring of the bearing to be tested, and make the inner ring of the bearing to be tested separate from the first support part 31, so that the inner ring and outer ring of the bearing to be tested are relatively separated in the axial direction, and then the second reading m is taken.

[0042] Calculate the gap: Subtract the first reading n from the second reading m to obtain the gap value d = mn.

[0043] Reset and unloading: After the measurement is completed, the lifting device 33 retracts, the second support part 32 descends, and the bearing returns to the state of being stably supported by the first support part 31, so that the material can be safely hoisted and unloaded.

[0044] Example 2: An axial clearance detection device for an extra-large slewing bearing, designed for situations where the inner ring end face of the bearing is located axially inside or on the same side as the outer ring end face, ensuring that when the outer ring of the bearing abuts against the first support portion 31, the inner ring of the bearing does not contact the second support portion 32. The difference from Example 1 is that it includes a fixed base 1, a sliding support block 3, and a detection gauge 4.

[0045] The fixed base 1 serves as the mounting foundation for the entire device, and its top is uniformly provided with at least three radial slide rail beams 2 along the circumference. These radial slide rail beams 2 provide a track for the radial movement of the sliding support block 3. To further enhance structural stability, support columns 7 can be installed at the outer ends of the radial slide rail beams 2 and fixed to the ground or other foundation structures.

[0046] The number of sliding support blocks 3 corresponds to the radial slide rail beams 2, and they are slidably connected to them one by one. Each sliding support block 3 includes a first support part 31, a second support part 32, and a lifting device 33.

[0047] In this embodiment, the bottom of the first support portion 31 is typically provided with a slider to accommodate sliding on the radial slide rail beam 2. The second support portion 32 is vertically slidably connected to the side of the first support portion 31 near the fixed base 1 via a guide rail structure.

[0048] The lifting device 33, such as but not limited to a hydraulic cylinder, an electric push rod, or a screw jack, is installed on the first support part 31, and its power output end is connected to the second support part 32 to drive the second support part 32 to rise and fall vertically.

[0049] The test gauge 4 is preferably a dial indicator or a micrometer, whose base is magnetically attached to the outer (or inner) ring of the bearing to be tested, and whose head is in contact with the top surface of the inner (or outer) ring of the bearing to be tested.

[0050] As needed, multiple test tables 4 can be set and evenly distributed along the circumference of the bearing to be tested during use.

[0051] The working principle is as follows:

[0052] Loading and positioning: The extra-large turntable bearing is hoisted onto the device, with its inner ring supported by the first support part 31 of multiple sliding support blocks 3. By radially moving each sliding support block 3, it slides along the radial slide rail beam 2 to a suitable support position to accommodate bearings of different sizes.

[0053] Install the test gauge 4, and use the magnetic force of the gauge base to attach it to the outer or inner ring of the bearing to be tested. The gauge head will then contact the top surface of the inner or outer ring of the bearing to be tested to take the first reading n.

[0054] Lifting and Separation: Start the lifting device 33 on each sliding support block 3 to make all the lifting devices 33 operate synchronously and drive the second support part 32 to rise, support the outer ring of the bearing to be tested, and make the inner ring of the bearing to be tested separate from the first support part 31, so that the inner ring and outer ring of the bearing to be tested are relatively separated in the axial direction, and then the second reading m is taken.

[0055] Calculate the gap: Subtract the first reading n from the second reading m to obtain the gap value d = mn.

[0056] Reset and unloading: After the measurement is completed, the lifting device 33 retracts, the second support part 32 descends, and the bearing returns to the state of being stably supported by the first support part 31, so that the material can be safely hoisted and unloaded.

[0057] Example 3, in conjunction with Appendix Figure 3-4 An axial clearance detection device for an extra-large turntable bearing, based on Embodiment 1 or 2: In order to further optimize the radial positioning of the bearing and prevent it from moving horizontally during the measurement process, this embodiment improves the first support part 31.

[0058] A radially extending stop portion 34 is provided on the side of the first support portion 31 opposite to the second support portion 32. This radially extending stop portion 34 is used to limit the bearing from the radially inner or radially outer side. That is, based on Embodiment 1, the radially extending stop portion 34 is used to limit the bearing from the radially inner side, and based on Embodiment 2, the radially extending stop portion 34 is used to limit the bearing from the radially outer side.

[0059] The top surface of the first support part 31 is provided with a radial groove 311. The radial stop part 34 is composed of a fixed baffle 341, a movable baffle 342 and an adjusting bolt 343.

[0060] The fixing baffle 341 is fixed to the side of the first support portion 31 opposite to the second support portion 32. That is, in the implementation based on Embodiment 1, the fixing baffle 341 is fixed to the inner side of the first support portion 31. In the implementation based on Embodiment 2, the fixing baffle 341 is fixed to the outer side of the first support portion 31.

[0061] The lower part of the movable baffle 342 is slidably embedded in the radial groove 311. The adjusting bolt 343 passes through the fixed baffle 341 and is connected to the movable baffle 342.

[0062] As a specific connection method, one end of the adjusting bolt 343 can be fixedly connected to the movable baffle 342. By tightening or loosening the nut on the adjusting bolt 343 relative to the fixed baffle 341, the position of the movable baffle 342 can be manually adjusted and fixed.

[0063] As an alternative connection method, one end of the adjusting bolt 343 can also be rotatably connected to the movable baffle 342 via a bearing, while its rod body is threadedly engaged with the fixed baffle 341. By directly rotating the adjusting bolt 343, the movable baffle 342 can be driven to move forward or backward along the radial slide groove 311, thereby adjusting and fixing the position of the movable baffle 342.

[0064] This allows the effective support width of the first support portion 31 to be adjusted according to the wall thickness of the inner or outer ring of the bearing, ensuring that the outer or inner ring of the bearing corresponding to the first support portion 32 is not affected by the first support portion 31.

[0065] Example 4, in conjunction with Appendix Figure 1-2 An axial clearance detection device for an extra-large turntable bearing, based on embodiments one, two or three: In order to further realize the automated synchronous movement of the sliding support block 3 and simplify the position adjustment operation during the loading and unloading process, this embodiment improves the fixed base 1.

[0066] like Figure 2As shown, the fixed base 1 has a hollow internal structure and is equipped with a lifting device 5, which can be a hydraulic lifting platform, an electric screw jack, etc. The sliding support block 3 is rotatably connected to the lifting part of the lifting device 5 via a connecting rod 6. Specifically, a pin seat 35 is provided at the bottom of the first support part 31, and the upper end of the connecting rod 6 is hinged to the pin seat 35 via a pin, while the lower end is hinged to the lifting part of the lifting device 5.

[0067] Meanwhile, vertical clearance notches 11 are provided on the side wall of each radial slide rail beam 2 corresponding to the fixed base 1, providing the necessary movement space for the connecting rod 6 to swing during the lifting process.

[0068] When the lifting device 5 drives its lifting part to descend, it pushes all the sliding support blocks 3 to move synchronously toward the center along the radial slide rail beam 2 through the connecting rod 6, which is suitable for supporting bearings with smaller diameters.

[0069] When the lifting device 5 drives its lifting part to rise, it pulls all the sliding support blocks 3 outward synchronously through the connecting rod 6 to accommodate the support of the larger diameter bearing.

[0070] The parts of this utility model not described in detail are prior art. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that this utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the above embodiments should be regarded as exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description. Therefore, it is intended to include all changes that fall within the meaning and scope of the equivalents of the claims in this utility model, and no reference numerals in the claims should be regarded as limiting the content of the claims.

Claims

1. A device for detecting the axial clearance of an extra-large slewing bearing, characterized in that, include: A fixed base (1) has at least three radial slide rail beams (2) uniformly arranged around its top in the circumferential direction. At least three sliding support blocks (3) are slidably connected to the radial slide rail beam (2) in a one-to-one correspondence; the sliding support block (3) includes a first support part (31), a second support part (32) and a lifting device (33). The second support part (32) is vertically slidably connected to the first support part (31) and is located on the side of the first support part (31) that is close to or far from the fixed base (1). The lifting device (33) drives the second support part (32) to support the outer ring or inner ring of the bearing to be tested, so that the inner ring or outer ring of the bearing to be tested is disengaged from the support of the first support part (31). The test gauge (4) has its base fixedly installed on the outer or inner ring of the bearing to be tested, and its head abuts against the top surface of the inner or outer ring of the bearing to be tested.

2. The axial clearance detection device for an extra-large slewing bearing according to claim 1, characterized in that: The first support portion (31) has an upwardly extending radial stop portion (34) on the side opposite to the second support portion (32).

3. The axial clearance detection device for an extra-large slewing bearing according to claim 2, characterized in that: The top surface of the first support part (31) is provided with a radial groove (311); the radial stop part (34) includes: A fixed baffle (341) is provided on the side of the first support part (31) away from the second support part (32); The movable baffle (342) is slidably connected to the radial groove (311). An adjusting bolt (343) passes through the fixed baffle (341) and is connected to the movable baffle (342) to adjust the position of the movable baffle (342).

4. The axial clearance detection device for an extra-large slewing bearing according to claim 3, characterized in that: One end of the adjusting bolt (343) is fixedly connected to the movable baffle (342) and is adjustablely fixed to the fixed baffle (341) by a nut.

5. The axial clearance detection device for an extra-large slewing bearing according to claim 3, characterized in that: One end of the adjusting bolt (343) is rotatably connected to the movable baffle (342) and threadedly fitted to the fixed baffle (341).

6. The axial clearance detection device for an extra-large slewing bearing according to claim 1, characterized in that: The fixed base (1) is hollow inside and is equipped with a lifting device (5). The sliding support block (3) is rotatably connected to the lifting part of the lifting device (5) through a connecting rod (6). The fixed base (1) has a vertical clearance notch (11) on the side wall corresponding to the radial slide rail beam (2).

7. The axial clearance detection device for an extra-large slewing bearing according to claim 6, characterized in that: The bottom of the first support part (31) is provided with a pin seat (35), and the connecting rod (6) is rotatably connected to the first support part (31) through the pin seat (35).

8. The axial clearance detection device for an extra-large slewing bearing according to claim 1, characterized in that: The outer end of the radial slide rail beam (2) is provided with a support column (7).

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