A combined bearing slewing bearing sealing performance testing device

Abstract

This application discloses a combined bearing turntable bearing sealing performance testing device, comprising: two sets of pressure-holding components arranged in a vertically mirror-image configuration; a support component detachably connected to one of the pressure-holding components for supporting the pressure-holding component; and a height adjustment component detachably connected to the other pressure-holding component for adjusting the height of the pressure-holding component. Each pressure-holding component includes: a flexible ring mounting plate; a first flexible ring and a second flexible ring, coaxially mounted on the flexible ring mounting plate. The vertically mirror-image arrangement of the pressure-holding components, in conjunction with a lifting mechanism, allows for rapid and continuous sealing performance testing of both end faces of the bearing without repeated clamping. The modular design of the pressure-holding components allows for quick adaptation to various bearing sizes by replacing different specifications of the flexible rings.

Description

Technical Field

[0001] This application relates to the field of bearing sealing performance testing technology, and in particular to a combined bearing turntable bearing sealing performance testing device. Background Technology

[0002] As a critical component in large-scale machinery, the sealing performance of slewing bearings directly affects the service life and reliability of the equipment. Existing bearing sealing performance testing devices often suffer from poor adaptability, cumbersome operation, and low testing efficiency. For example, some devices cannot quickly adapt to bearings of different sizes and specifications, and changing fixtures is time-consuming and labor-intensive; other devices struggle to perform rapid and continuous sealing performance testing on both end faces of the bearing. Therefore, there is an urgent need for a device that can quickly adapt to different bearings, is easy to operate, and enables efficient double-sided testing. Utility Model Content

[0003] The purpose of this application is to provide a combined bearing slewing bearing sealing performance testing device to solve the above-mentioned problems, and to provide a combined bearing slewing bearing sealing performance testing device with reasonable structure, convenient operation, high testing efficiency and strong adaptability.

[0004] This application achieves the above objectives through the following technical solutions:

[0005] A combined bearing slewing bearing sealing performance testing device, comprising:

[0006] Two sets of pressure-holding components are arranged in a vertically mirror-like manner.

[0007] A support assembly, which is detachably connected to one of the pressure-holding assemblies, for supporting the pressure-holding assembly;

[0008] A height adjustment assembly, which is detachably connected to another pressure-holding assembly, is used to adjust the height of the pressure-holding assembly;

[0009] Each pressure-holding assembly includes:

[0010] Flexible ring mounting plate;

[0011] A first flexible ring and a second flexible ring are coaxially disposed on the flexible ring mounting plate, and the diameter of the second flexible ring is smaller than the diameter of the first flexible ring, so as to form a sealed air passage between them.

[0012] An air pressure supply device, connected to the air passage, is used to supply air pressure to the air passage;

[0013] A pressure detection device, connected to the airway, is used to detect the pressure of the airway.

[0014] A pressure relief device, connected to the airway, is used to relieve pressure in the airway.

[0015] In some embodiments, the pressure-holding assembly further includes a washer disposed along the edge of the flexible ring mounting disc, with the first flexible ring disposed on the washer, thereby creating a height difference between the first and second flexible rings to accommodate the height difference between the inner and outer rings of the bearing.

[0016] In some embodiments, the first flexible ring is fixed to the washer by adhesive bonding, and / or the second flexible ring is fixed to the flexible ring mounting plate by adhesive bonding.

[0017] In some embodiments, the air pressure supply device includes a booster pump, the outlet of which is connected to the flexible ring mounting plate and communicates with the air passage, and the outlet is provided with a check valve to prevent backflow of gas; the air pressure detection device includes a pressure gauge, the detection end of which is connected to the air passage; the pressure relief device includes an electric valve, which is connected to the air passage through a pipeline.

[0018] In some embodiments, a positioning post is fixedly connected to the center of the back side of the flexible ring mounting plate. The positioning post can be detachably connected to the positioning sleeve to achieve the positioning of the pressure holding component.

[0019] In some embodiments, the support assembly includes a chassis, and a plurality of positioning strips are fixedly disposed on the top surface of the chassis for supporting the flexible ring mounting plate of the pressure holding assembly; the pressure holding assembly is provided with a plurality of sets of locking members, each set of locking members including two positioning pieces, and the positioning strips can be positioned between the two positioning pieces to limit the position of the flexible ring mounting plate.

[0020] In some embodiments, the support assembly further includes a positioning sleeve fixedly connected to the chassis, the positioning sleeve being detachably connected to the positioning post of the pressure-holding assembly to achieve positioning of the pressure-holding assembly.

[0021] In some embodiments, the height adjustment assembly includes a stand and an electric push rod. The electric push rod is fixedly mounted on the stand, and a lifting support plate is fixedly provided at the output end of the electric push rod. A plurality of mounting support bars are fixedly connected to the bottom of the lifting support plate. Each mounting support bar has a first elongated hole, and the lifting support plate has a second elongated hole. Fasteners can pass through the first elongated hole and the second elongated hole and cooperate with nuts to fasten the pressure holding assembly to the lifting support plate.

[0022] In some embodiments, the height adjustment assembly further includes a positioning sleeve fixedly connected to the bottom of the lifting support plate, and the positioning sleeve is detachably connected to the positioning column of the pressure holding assembly to achieve positioning of the pressure holding assembly.

[0023] In some embodiments, the first flexible ring and the second flexible ring are made of rubber material.

[0024] Compared to existing technologies, this application utilizes a pressure-holding component arranged in a mirror image with a lifting mechanism, enabling rapid and continuous sealing tests on both end faces of the bearing without the need for repeated clamping. The modular design of the pressure-holding component allows for quick adaptation to various bearing sizes by replacing flexible rings of different specifications. The "double flexible ring + washer" structure precisely matches the height difference between the inner and outer rings of the bearing, forming an effective sealing air passage and preventing misjudgments. The positioning pins and sleeves, locking components and positioning strips ensure rapid and accurate installation. The electric push rod drive and robust rigid frame make operation labor-saving, positioning precise, and operation stable. Attached Figure Description

[0025] The accompanying drawings are provided to further illustrate the present application and form part of the specification. They are used together with the following detailed description to explain the present application, but do not constitute a limitation thereof. In the drawings:

[0026] Figure 1 This is a schematic diagram of the structure of this application;

[0027] Figure 2 This is a schematic diagram of the pressure-holding component structure of this application;

[0028] Figure 3 This is a schematic diagram of the positioning sleeve structure of this application;

[0029] Figure 4 This is a schematic diagram of the installation support bar structure of this application.

[0030] The annotations in the attached figures are explained as follows:

[0031] 4. Flexible ring mounting plate; 5. Washer; 6. First flexible ring; 7. Second flexible ring; 8. Booster pump; 9. Pressure gauge; 10. Electric valve; 11. Positioning pin; 12. Positioning sleeve; 13. Chassis; 14. Positioning strip; 15. Locking component; 16. Stand; 17. Electric push rod; 18. Lifting support plate; 19. Mounting support strip; 20. First elongated hole; 21. Fastener; 22. Second elongated hole. Detailed Implementation

[0032] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0033] In the description of this application, it should be understood that the terms "upper," "lower," "front," "back," "left," "right," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the appendix. Figure 1 This description is provided for the convenience of describing this application and for the purpose of simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0034] like Figure 1-4 As shown, a combined bearing turntable bearing sealing performance testing device employs two sets of pressure-holding components arranged in a mirror-symmetrical manner, which are supported and driven by a fixed support component and a height-adjustable component, thereby enabling rapid and continuous testing of the sealing performance of the upper and lower end faces of the bearing.

[0035] I. Specific implementation method of the pressure holding assembly:

[0036] The pressure holding assembly is the core functional module of this device for achieving sealing and pressure testing. Each pressure holding assembly mainly includes a flexible ring mounting plate 4, a gasket 5, a first flexible ring 6, a second flexible ring 7, a booster pump 8, a pressure gauge 9, an electric valve 10, and a positioning column 11.

[0037] The flexible ring mounting plate 4 is preferably made of metal (such as aluminum alloy or steel) or high-strength engineering plastic, and its structural strength is sufficient to support the air pressure load during the testing process.

[0038] The washer 5 is fixedly bonded or fastened to the edge of the flexible ring mounting plate 4 facing the bearing by screws. The thickness of the washer 5 is precisely designed to elevate the first flexible ring 6, creating a significant height difference between it and the second flexible ring 7, which is directly fixed to the end face of the flexible ring mounting plate 4. This height difference is crucial for precisely matching the step height between the inner and outer rings of the bearing under test, ensuring that when compressed, the first flexible ring 6 can tightly adhere to the outer ring end face of the combined sealing bearing, while the second flexible ring 7 can simultaneously tightly adhere to the inner ring end face of the combined sealing bearing.

[0039] The first flexible ring 6 and the second flexible ring 7 are preferably made of rubber materials with good elasticity and sealing properties (such as nitrile rubber or silicone rubber). They are fixed to the upper surface of the gasket 5 and the end face of the flexible ring mounting plate 4 respectively by adhesive. The inner diameter of the first flexible ring 6 is larger than the outer diameter of the second flexible ring 7, so that the two remain coaxial after installation and there is an annular gap between them. This annular gap, together with the channel inside the flexible ring mounting plate 4, forms a closed "air passage".

[0040] The booster pump 8 is connected to the air inlet on the flexible ring mounting plate 4 via a pipeline, and this air inlet communicates with the aforementioned "air passage". The booster pump 8 is used to fill the air passage with gas (such as air or inert gas) to increase its pressure. A check valve is preferably installed at the outlet of the booster pump 8 to prevent high-pressure gas backflow and maintain pressure stability within the air passage.

[0041] The detection end of the pressure gauge 9 is connected to the air passage via a pipeline for real-time monitoring and display of the gas pressure value within the air passage. Operators can judge the sealing performance of the bearing by observing changes in the reading of the pressure gauge 9.

[0042] The electric valve 10 is also connected to the air passage via a pipeline, typically located at the end of the air passage or at an appropriate position. After a test is completed, the pressurized gas in the air passage can be quickly released by controlling the opening of the electric valve 10, so that the bearing under test can be safely removed.

[0043] The positioning pin 11 is fixedly connected (e.g., by welding or threading) to the center of the side of the flexible ring mounting plate 4 facing away from the bearing. The function of the positioning pin 11 is to cooperate with the positioning sleeve 12 described later to achieve rapid and accurate positioning of the pressure holding assembly on the support assembly or height adjustment assembly, ensuring installation repeatability accuracy.

[0044] II. Specific implementation methods for the support components:

[0045] The support component is used to secure the pressure-holding component located below, and its structural design emphasizes stability and quick positioning and disassembly.

[0046] The supporting assembly mainly includes a chassis 13, positioning strips 14, positioning sleeves 12, and locking components 15. The chassis 13 serves as the base of the entire device and is typically made of heavy steel plates to ensure stability. On the top surface of the chassis 13, multiple (e.g., three or four) radially arranged positioning strips 14 are uniformly fixed and installed along the circumference. These positioning strips 14 together form a support platform for supporting the flexible ring mounting plate 4 of the pressure-holding assembly below.

[0047] The positioning sleeve 12 is fixedly installed at the center of the chassis 13, and its inner hole size forms a clearance fit or transition fit with the positioning post 11 on the pressure holding assembly. During installation, simply align the positioning post 11 of the lower pressure holding assembly and insert it into the positioning sleeve 12 to complete its initial center positioning on the horizontal plane.

[0048] To further restrict the circumferential rotation and radial movement of the pressure-holding assembly, multiple sets of locking members 15, corresponding to the number and position of the positioning strips 14, are fixedly installed on the bottom edge of the flexible ring mounting plate 4 of the lower pressure-holding assembly. Each set of locking members 15 consists of two parallel positioning pieces. After the positioning post 11 is inserted into the positioning sleeve 12, the flexible ring mounting plate 4 is gently rotated so that each positioning strip 14 is precisely embedded between the two positioning pieces of the corresponding locking member 15. This design enables the pressure-holding assembly to be quickly and accurately installed and circumferentially limited on the support assembly without the need for tools; disassembly can be performed by reversing the operation.

[0049] III. Specific implementation methods of the height adjustment component:

[0050] The height adjustment assembly supports and drives the pressure holding assembly above to move vertically, thereby clamping and releasing the bearing.

[0051] The height adjustment assembly mainly includes a stand 16, an electric push rod 17, a lifting support plate 18, a mounting support bar 19, a fastener 21, and a positioning sleeve 12.

[0052] The support frame 16 is a rigid frame structure, with its bottom fixedly connected to the base 13 of the supporting assembly, providing stable support. The electric push rod 17 is vertically fixedly installed on the top crossbeam of the support frame 16. The output end of the electric push rod 17 extends downward and is fixedly connected to the center of the lifting support plate 18. By controlling the extension and retraction of the electric push rod 17, the lifting support plate 18 and the entire upper pressure holding assembly connected to it can be precisely driven to rise or fall.

[0053] The bottom of the lifting support plate 18 is fixedly connected to multiple (e.g., three or four) mounting support bars 19 evenly distributed circumferentially. Each mounting support bar 19 has a first elongated hole 20 extending radially. Correspondingly, a second elongated hole 22 corresponding to the position of the first elongated hole 20 is also formed on the plate body of the lifting support plate 18.

[0054] The installation method of the upper pressure-holding component is as follows: First, insert its positioning pin 11 into the positioning sleeve 12 fixed at the bottom center of the lifting support plate 18 to complete the initial center positioning. Then, let the screw of the fastener 21 (usually a bolt) pass through the first elongated hole 20 on the mounting support bar 19 and the second elongated hole 22 on the lifting support plate 18 in sequence, and finally tighten it with a nut. The matching design of the first elongated hole 20 and the second elongated hole 22 allows the pressure-holding component to have a certain adjustment margin in the radial and circumferential directions. Even if the mounting hole positions of pressure-holding components of different specifications (adapting to bearings of different sizes) are slightly different, they can be adjusted and reliably fixed through the elongated holes, enhancing the adaptability of the device. This connection method not only ensures the firmness of the connection, but also facilitates the disassembly and assembly operation when the pressure-holding component needs to be replaced.

[0055] IV. Specific Implementation Methods for the Device's Working Process:

[0056] The working process of the device in this application is as follows:

[0057] Preparation and Installation: Based on the dimensions of the bearing to be tested, select a pressure-holding assembly equipped with a first flexible ring 6 and a second flexible ring 7 of appropriate size. Quickly install the lower pressure-holding assembly onto the support assembly by using the engagement of the positioning pin 11 and the positioning sleeve 12, and the engagement of the locking piece 15 and the positioning strip 14. Similarly, install the upper pressure-holding assembly onto the lifting support plate 18 of the height adjustment assembly by using the engagement of the positioning pin 11 and the positioning sleeve 12, and by locking it with the fastener 21 through the elongated hole.

[0058] Bearing Placement and First Inspection: Place the bearing to be tested on the lower pressure-holding assembly, ensuring that the inner and outer rings of the bearing are approximately aligned with the second flexible ring 7 and the first flexible ring 6, respectively. Extend the electric push rod 17 to drive the upper pressure-holding assembly downwards until the first flexible ring 6 and the second flexible ring 7 are pressed against the outer and inner rings of the upper end face of the bearing, respectively. At this point, the "air passages" of the upper and lower pressure-holding assemblies form sealed cavities with the corresponding areas of the gaps between the inner and outer rings on the upper and lower end faces of the bearing. Start the booster pump 8 to pressurize the sealed air passages. Stop pressurizing after the pressure gauge 9 shows that the pressure has reached the set value. Maintain pressure for a period of time and observe whether the reading of the pressure gauge 9 is stable. If the pressure drops significantly, it indicates that the end face sealing is unqualified; if the pressure remains stable, it indicates that the end face sealing is good. After the test is completed, open the electric valve 10 to release pressure.

[0059] Second test: After depressurization, retract the electric push rod 17 to raise the upper pressure-holding assembly. Rotate the bearing 180 degrees and place it back on the lower pressure-holding assembly. Repeat step 2 to test the seal on the other end face of the bearing.

[0060] Replacement and Adaptation: When testing bearings of different specifications, simply loosen fastener 21, remove the upper and lower pressure-holding components as a whole, and replace them with pressure-holding components adapted to the new bearing size. The entire replacement process is simple and quick, greatly improving testing efficiency.

[0061] The foregoing has shown and described the basic principles, main features, and advantages of this application. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this application. Various changes and modifications can be made to this application without departing from the spirit and scope thereof, and all such changes and modifications fall within the scope of this application as claimed. The scope of protection of this application is defined by the appended claims and their equivalents.

Claims

1. A combined bearing slewing disc bearing sealing performance testing device, characterized in that, include: Two sets of pressure-holding components are arranged in a vertically mirror-like manner. A support assembly, which is detachably connected to one of the pressure-holding assemblies, for supporting the pressure-holding assembly; A height adjustment assembly, which is detachably connected to another pressure-holding assembly, is used to adjust the height of the pressure-holding assembly; Each pressure-holding assembly includes: Flexible ring mounting plate (4); The first flexible ring (6) and the second flexible ring (7) are coaxially arranged on the flexible ring mounting plate (4), and the diameter of the second flexible ring (7) is smaller than the diameter of the first flexible ring (6) so that a sealed air passage is formed between them. An air pressure supply device, connected to the air passage, is used to supply air pressure to the air passage; A pressure detection device, connected to the airway, is used to detect the pressure of the airway. A pressure relief device, connected to the airway, is used to relieve pressure in the airway.

2. The combined bearing turntable bearing leak detection apparatus of claim 1, wherein, The pressure-holding assembly also includes a washer (5) which is disposed along the edge of the flexible ring mounting plate (4). The first flexible ring (6) is disposed on the washer (5), thereby creating a height difference between the first flexible ring (6) and the second flexible ring (7) to accommodate the height difference between the inner and outer rings of the bearing.

3. The combined bearing turntable bearing leak detection apparatus of claim 2, wherein, The first flexible ring (6) is fixed to the washer (5) by adhesive bonding, and / or the second flexible ring (7) is fixed to the flexible ring mounting plate (4) by adhesive bonding.

4. The combined bearing turntable bearing leak detection apparatus of claim 1, wherein, The air pressure supply device includes a booster pump (8), the outlet of which is connected to the flexible ring mounting plate (4) and communicates with the air passage. The outlet is provided with a check valve to prevent backflow of gas. The air pressure detection device includes a pressure gauge (9), the detection end of which is connected to the air passage. The pressure relief device includes an electric valve (10), which is connected to the air passage through a pipeline.

5. The combined bearing turntable bearing leak detection apparatus of claim 1, wherein, A positioning post (11) is fixedly connected to the center of the back side of the flexible ring mounting plate (4). The positioning post (11) can be detachably connected to the positioning sleeve (12) to realize the positioning of the pressure holding component.

6. The combined bearing turntable bearing leak detection apparatus of claim 1, wherein, The supporting component includes a chassis (13), and a plurality of positioning strips (14) are fixedly provided on the top surface of the chassis (13) for supporting the flexible ring mounting plate (4) of the pressure holding component; the pressure holding component is provided with a plurality of sets of locking parts (15), each set of locking parts (15) includes two positioning pieces, and the positioning strips (14) can be positioned between the two positioning pieces to limit the position of the flexible ring mounting plate (4).

7. The combined bearing turntable bearing leak detection apparatus of claim 6, wherein, The support assembly also includes a positioning sleeve (12) fixedly connected to the chassis (13). The positioning sleeve (12) is detachably connected to the positioning post (11) of the pressure holding assembly to achieve the positioning of the pressure holding assembly.

8. The combined bearing slewing bearing sealing performance testing device as described in claim 1, characterized in that, The height adjustment assembly includes a stand (16) and an electric push rod (17). The electric push rod (17) is fixedly installed on the stand (16), and a lifting support plate (18) is fixedly provided at the output end of the electric push rod (17). A plurality of mounting support bars (19) are fixedly connected to the bottom of the lifting support plate (18). Each mounting support bar (19) has a first elongated hole (20), and the lifting support plate (18) has a second elongated hole (22). Fasteners (21) can pass through the first elongated hole (20) and the second elongated hole (22) and cooperate with nuts to fasten the pressure holding assembly to the lifting support plate (18).

9. The combined bearing turntable bearing leak detection apparatus of claim 8, wherein, The height adjustment assembly also includes a positioning sleeve (12) fixedly connected to the bottom of the lifting support plate (18). The positioning sleeve (12) is detachably connected to the positioning column (11) of the pressure holding assembly to achieve the positioning of the pressure holding assembly.

10. The combined bearing turntable bearing leak detection apparatus of claim 1, wherein, The first flexible ring (6) and the second flexible ring (7) are made of rubber material.

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