Spherical plain bearing with online monitoring device

Abstract

The utility model relates to bearing technical field especially is involved in a kind of spherical plain bearing with on-line monitoring device, including bearing outer ring and the bearing inner ring rotationally arranged in bearing outer ring, further include the monitoring device for monitoring bearing inner ring outer surface wear, installation cavity is opened in bearing outer ring, monitoring device is arranged in installation cavity, monitoring device includes mounting seat, monitoring ball, fixed contact and the movable contact matched with fixed contact, monitoring ball rotationally arranged in mounting seat, and monitoring ball protrudes from mounting seat and can contact with bearing inner ring, mounting seat and bearing outer ring elastically connect, so that monitoring ball contacts bearing inner ring, fixed contact and bearing outer ring fixed connection, movable contact is arranged on mounting seat, movable contact can contact with fixed contact after moving on mounting seat, and the contact of movable contact controlled by elastic movement monitoring ball directly triggers wear overrun signal, and monitoring ball and bearing inner ring directly contact, eliminate indirect measurement error.

Description

Technical Field

[0001] This utility model relates to the field of bearing technology, and in particular to a spherical plain bearing with an online monitoring device. Background Technology

[0002] Spherical plain bearings are used in hydraulic applications and need to withstand complex alternating loads. Their failure mainly stems from wear on the outer surface of the bearing's inner ring, but traditional monitoring methods have significant drawbacks: they require shutdown and disassembly for inspection, which is inefficient and may miss the optimal maintenance window, and cannot achieve real-time monitoring; the internal space of the bearing is small, making it difficult to embed traditional eddy current or vibration sensors; existing contact probes are prone to false triggering due to vibration or assembly errors, and are difficult to adapt to the spherical structure. Utility Model Content

[0003] The technical problem to be solved by this utility model is: in order to overcome the problems of the existing technology that require stopping the machine for disassembly and inspection, which is inefficient and may miss the best maintenance time, and cannot achieve real-time monitoring, a spherical plain bearing with an online monitoring device is provided.

[0004] The technical solution adopted by this utility model to solve its technical problem is as follows: a spherical plain bearing with an online monitoring device, including an outer bearing ring and an inner bearing ring rotatably arranged within the outer bearing ring, and further including a monitoring device for monitoring the wear of the outer surface of the inner bearing ring. A mounting cavity is provided inside the outer bearing ring, and the monitoring device is arranged within the mounting cavity. The monitoring device includes a mounting base, a monitoring ball, a fixed contact, and a moving contact matching the fixed contact. The monitoring ball is rotatably arranged within the mounting base, and protrudes from the mounting base and can contact the inner bearing ring. The mounting base and the outer bearing ring are elastically connected, allowing the monitoring ball to contact the inner bearing ring. The fixed contact is fixedly connected to the outer ring of the bearing, while the moving contact is arranged on the mounting base. The moving contact can contact the fixed contact after the mounting base moves. The contact between the moving contact and the fixed contact, controlled by the elastic movement monitoring ball, directly triggers the wear over-limit signal without stopping the machine. The monitoring ball is in direct contact with the inner ring of the bearing, eliminating indirect measurement errors. Furthermore, the monitoring ball can change the rigid contact during monitoring to rolling contact, reducing damage to both during contact. The elastic connection ensures that the monitoring ball is always in contact with the inner ring of the bearing, avoiding failure due to assembly or vibration. The monitoring device is completely integrated into the mounting cavity of the outer ring of the bearing, without occupying additional space.

[0005] To address the problem of monitoring balls easily falling off or getting stuck, making replacement and maintenance difficult, the mounting base further includes a first mounting part and a second mounting part. The first mounting part has a mounting groove, and the second mounting part has a mounting hole for the monitoring ball to pass through and to restrict the monitoring ball. The first mounting part and the second mounting part are threaded together, and the mounting groove and the mounting hole are connected. The monitoring ball is arranged in the mounting groove and partially passes through the mounting hole. The diameter of the mounting hole on the side near the inner ring of the bearing is smaller than the diameter of the monitoring ball.

[0006] To address the issue of false contact triggering caused by misalignment of the mounting base's movement path, the mounting cavity is further provided with a guide portion protruding from the interior, and the mounting base has a accommodating groove for the guide portion to move.

[0007] To address the issue of insufficient or excessive contact pressure between the monitoring ball and the inner ring, a protective housing and an elastic element are further included. The protective housing is fixedly connected to the outer ring of the bearing, and the protective housing covers the mounting cavity opening. One end of the elastic element abuts against the protective housing, and the other end abuts against the mounting base.

[0008] To address the issue of fixed wear alarm thresholds that cannot adapt to different operating conditions, the monitoring device further includes an adjustment seat, which is fixedly connected to the mounting seat. The adjustment seat is located within the receiving groove and above the guide portion. The moving contact is threadedly connected to the adjustment seat, and the fixed contact is fixedly connected to the guide portion.

[0009] To address the issues of easily worn and broken external wires and unreliable signal transmission, a further feature includes a battery and signal transmitter housed within the protective casing.

[0010] The beneficial effects of this utility model are as follows: The spherical plain bearing with an online monitoring device provided by this utility model directly triggers the wear over-limit signal through the contact between the moving contact and the fixed contact controlled by the elastically moving monitoring ball, without stopping the machine. Moreover, the monitoring ball is in direct contact with the inner ring of the bearing, eliminating indirect measurement errors. Furthermore, the monitoring ball can change the rigid contact during monitoring to rolling contact, reducing damage to both during contact. The elastic connection ensures that the monitoring ball is always in contact with the inner ring of the bearing, avoiding failure due to assembly or vibration. The monitoring device is completely integrated into the mounting cavity of the outer ring of the bearing, without occupying additional space. Attached Figure Description

[0011] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 This is a utility model Figure 1 Schematic diagram of the cross-sectional structure at point AA;

[0014] Figure 3 This is a utility model Figure 2 Enlarged structural diagram at point B;

[0015] Figure 4 This is a utility model Figure 3 A magnified structural diagram at point C.

[0016] In the diagram: 1. Bearing outer ring, 11. Mounting cavity, 12. Guide part, 2. Bearing inner ring, 3. Mounting seat, 31. First mounting part, 311. Mounting groove, 32. Second mounting part, 321. Mounting hole, 33. Receiving groove, 4. Monitoring ball, 5. Fixed contact, 6. Moving contact, 61. Battery, 62. Signal transmitter, 7. Protective housing, 71. Elastic element, 8. Adjustment seat. Detailed Implementation

[0017] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0018] like Figure 1 This is a schematic diagram of the structure of this utility model, a spherical plain bearing with an online monitoring device, including an outer bearing ring 1 and an inner bearing ring 2 rotatably arranged within the outer bearing ring 1, as shown below. Figure 2 , 3 As shown, it also includes a monitoring device for monitoring the wear of the outer surface of the bearing inner ring 2. A mounting cavity 11 is provided inside the bearing outer ring 1, and the monitoring device is arranged inside the mounting cavity 11. The monitoring device includes a mounting base 3, a monitoring ball 4, a fixed contact 5, and a moving contact 6 that matches the fixed contact 5. The monitoring ball 4 is rotatably arranged inside the mounting base 3, and protrudes from the mounting base 3 and can contact the bearing inner ring 2. The mounting base 3 and the bearing outer ring 1 are elastically connected, allowing the monitoring ball 4 to contact the bearing inner ring 2. The fixed contact 5 is fixedly connected to the bearing outer ring 1. The moving contact 6 is arranged on the mounting base 3. Contact 6 can contact fixed contact 5 after the mounting base 3 moves. The contact between moving contact 6 and fixed contact 5, controlled by elastic moving monitoring ball 4, directly triggers the wear over-limit signal without stopping the machine. Furthermore, monitoring ball 4 directly contacts the bearing inner ring 2, eliminating indirect measurement errors. Monitoring ball 4 can also change the rigid contact during monitoring to rolling contact, reducing damage to both during contact. The elastic connection ensures that monitoring ball 4 always fits against the bearing inner ring 2, avoiding failure due to assembly or vibration. The monitoring device is fully integrated into the mounting cavity 11 of the bearing outer ring 1, without occupying additional space.

[0019] like Figure 2 , 3As shown in Figure 4, the mounting base 3 includes a first mounting part 31 and a second mounting part 32. The first mounting part 31 has a mounting groove 311, and the second mounting part 32 has a mounting hole 321 for the monitoring ball 4 to pass through and to restrict the monitoring ball 4. The first mounting part 31 and the second mounting part 32 are threaded together. The mounting groove 311 and the mounting hole 321 are connected. The monitoring ball 4 is arranged in the mounting groove 311 and partially passes through the mounting hole 321. The diameter of the mounting hole 321 on the side near the inner ring 2 of the bearing is smaller than the diameter of the monitoring ball 4. The split mounting base 3 is designed to facilitate the disassembly and assembly of the monitoring ball. The mounting hole 321 limits the movement to prevent the monitoring ball 4 from falling off.

[0020] like Figure 3 As shown, a guide portion 12 protrudes from the interior of the mounting cavity 11, and a receiving groove 33 is provided on the mounting base 3 for the guide portion 12 to move. The guide portion 12 cooperates with the receiving groove 33 to ensure that the mounting base 3 moves vertically and improves signal accuracy.

[0021] like Figure 3 As shown, the monitoring device includes a protective housing 7 and an elastic element 71. The protective housing 7 is fixedly connected to the bearing outer ring 1. The protective housing 7 covers the opening of the mounting cavity 11. One end of the elastic element 71 abuts against the protective housing 7, and the other end abuts against the mounting base 3. The elastic element 71 provides a stable preload to ensure reliable contact and buffer vibration impact.

[0022] like Figure 3 As shown, the monitoring device includes an adjustment seat 8, which is fixedly connected to the mounting seat 3. The adjustment seat 8 is located in the receiving groove 33 and above the guide part 12. The moving contact 6 is threadedly connected to the adjustment seat 8, and the fixed contact 5 is fixedly connected to the guide part 12. The adjustment seat 8 is threadedly connected to the moving contact, so as to realize the flexible fine adjustment of the wear threshold.

[0023] like Figure 3 As shown, the protective casing 7 houses a battery 61 and a signal transmitter 62, which integrates a power supply and a wireless transmission module to achieve wireless signal transmission and improve durability.

[0024] In the initial state, when the monitoring device is placed in the mounting cavity 11, the elastic element 71 is in a compressed state. The elastic element 71 pushes the mounting seat 3, causing the monitoring ball 4 to bulge out and fit tightly against the outer surface of the bearing inner ring 2; the moving contact 6 and the fixed contact 5 are in a separated state.

[0025] When the inner ring 2 and outer ring 1 of the bearing are worn, the wear of the inner ring 2 causes the outer surface to be concave. The monitoring ball 4 moves upward under the action of the elastic element 71, which drives the mounting seat 3 to move upward along the guide part 12.

[0026] When the wear reaches a preset threshold, the mounting base 3 moves down to make the moving contact 6 contact the fixed contact 5, the circuit is turned on, and the signal transmitter 62 inside the moving contact 6 is triggered to send an alarm signal outward.

[0027] After the bearing is replaced, the elastic element 71 pushes the mounting seat 3, and the monitoring ball 4 re-fits the surface of the new bearing inner ring 2.

[0028] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A spherical plain bearing with an online monitoring device, comprising an outer bearing ring (1) and an inner bearing ring (2) rotatably arranged within the outer bearing ring (1), characterized in that, It also includes a monitoring device for monitoring the wear of the outer surface of the bearing inner ring (2). The bearing outer ring (1) has an installation cavity (11) and the monitoring device is arranged in the installation cavity (11). The monitoring device includes a mounting base (3), a monitoring ball (4), a fixed contact (5), and a moving contact (6) that matches the fixed contact (5). The monitoring ball (4) is rotatably arranged in the mounting base (3) and protrudes from the mounting base (3) and can contact the bearing inner ring (2). The mounting base (3) and the bearing outer ring (1) are elastically connected so that the monitoring ball (4) contacts the bearing inner ring (2). The fixed contact (5) and the bearing outer ring (1) are fixedly connected. The moving contact (6) is arranged on the mounting base (3) and can contact the fixed contact (5) after the mounting base (3) moves.

2. The spherical plain bearing with online monitoring device as described in claim 1, characterized in that: The mounting base (3) includes a first mounting part (31) and a second mounting part (32). The first mounting part (31) has a mounting groove (311), and the second mounting part (32) has a mounting hole (321) for the monitoring ball (4) to pass through and restrict the monitoring ball (4). The first mounting part (31) and the second mounting part (32) are threaded together. The mounting groove (311) and the mounting hole (321) are connected. The monitoring ball (4) is arranged in the mounting groove (311) and partially passes through the mounting hole (321). The diameter of the mounting hole (321) on the side near the inner ring (2) of the bearing is smaller than the diameter of the monitoring ball (4).

3. The spherical plain bearing with online monitoring device as described in claim 1, characterized in that: The mounting cavity (11) has a protruding guide portion (12) inside, and the mounting base (3) has a accommodating groove (33) for the guide portion (12) to move.

4. The spherical plain bearing with online monitoring device as described in claim 3, characterized in that: The monitoring device includes a protective shell (7) and an elastic element (71). The protective shell (7) and the bearing outer ring (1) are fixedly connected. The protective shell (7) covers the opening of the mounting cavity (11). One end of the elastic element (71) abuts against the protective shell (7) and the other end abuts against the mounting base (3).

5. The spherical plain bearing with online monitoring device as described in claim 3, characterized in that: The monitoring device includes an adjustment seat (8), which is fixedly connected to the mounting seat (3). The adjustment seat (8) is located in the receiving groove (33) and above the guide part (12). The moving contact (6) is threadedly connected to the adjustment seat (8), and the fixed contact (5) is fixedly connected to the guide part (12).

6. The spherical plain bearing with online monitoring device as described in claim 4, characterized in that: The protective casing (7) contains a battery (61) and a signal transmitter (62).

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