A new type of secondary screen bearing

Abstract

The utility model relates to a novel secondary filter screen bearing belongs to bearing technical field, including bearing outer ring and the bearing inner ring rotationally connected in the inside of bearing outer ring, the upper and lower both sides surface of bearing outer ring all symmetry has two fixed slots extending to the inside, the upper and lower end position between bearing outer ring and bearing inner ring all is provided with the protection mechanism, the utility model relates to a novel secondary filter screen bearing, through the outer ring of protection mechanism and bearing outer ring inside close combination forms the first radial seal barrier, the protection pad of inside ring is combined bearing inner ring outer surface with constant pressure and constitutes the second end face dynamic seal, double protection cooperates and blocks the impurity invasion in water bearing rolling area, realizes the long -term maintenance -free operation of bearing in the impurity water flow, the rigid locking of protection mechanism is realized to the rigid locking of protection mechanism by the fixed bolt screwing into fixed slot of fixed mechanism, the meshing design of ratchet and pawl completely eliminates the fixed bolt counterclockwise loosening caused by operation vibration.

Description

Technical Field

[0001] This invention belongs to the field of bearing technology, specifically relating to a novel secondary filter bearing. Background Technology

[0002] The core function of a secondary filter is to continuously filter the cooling water flowing through it. Its core working component is usually a rotating filter cylinder (or mesh core) with filter mesh holes. Driven by a drive device (such as a motor), the filter cylinder rotates slowly while filtering the water flow. During the rotation, impurities trapped on the inner surface of the filter are periodically removed and discharged through a specific sewage discharge mechanism (such as a backwashing device, a negative pressure suction nozzle, a scraper, etc.), thereby achieving continuous self-cleaning of the filter and maintaining filtration efficiency. Bearings serve as the core supporting component of the secondary filter.

[0003] Cooling water taken from rivers generally contains a large amount of silt. If bearings operate in water containing a large amount of silt for a long time, the wear will increase, affecting their service life and causing frequent replacements. This, in turn, affects the supply of cooling water and affects the operation of the generator set. Therefore, it is necessary to develop silt-proof bearings.

[0004] A Chinese patent discloses an anti-sand bearing for secondary filters in thermal power plants (authorization announcement number CN208348312U). The patented technology proposes an anti-sand bearing for secondary filters in thermal power plants, which solves the problem of bearings experiencing significant wear and short service life due to long-term operation in water with high sand content, thus affecting the operation of generator sets.

[0005] However, it has certain drawbacks: its reliance on an external high-pressure water source for water injection complicates the system, and the tiny injection holes are easily clogged and fail in water containing impurities; more importantly, the opening of the annular diversion channel and guide channel significantly weakens the structural strength of the bearing, which is prone to stress concentration deformation under heavy load and water flow impact conditions; in addition, the static water injection design cannot match the dynamic sealing requirements of the rotating filter cartridge, the water flow direction is mismatched with the movement trajectory of the inner ring of the bearing, and silt can still invade the rolling element area, making maintenance-free operation impossible. In summary, its method of avoiding silt wear on the bearing needs to be optimized. Utility Model Content

[0006] The purpose of this invention is to provide a novel secondary filter bearing that can solve the problems mentioned in the background art.

[0007] The specific technical solution adopted in this utility model is as follows:

[0008] A novel secondary filter bearing includes an outer bearing ring and an inner bearing ring rotatably connected to the inner side of the outer bearing ring. The upper and lower surfaces of the outer bearing ring are symmetrically provided with two fixing grooves extending to the inner side. Protective mechanisms are provided at the upper and lower ends between the outer bearing ring and the inner bearing ring.

[0009] The protective mechanism includes an outer ring, an inner ring that is movably fitted to the inner side of the outer ring, and a mating groove is provided on the inner surface of the outer ring. A mating ring is fixedly sleeved on the outer surface of the inner ring. Multiple round beads are evenly embedded and rolled on both the upper and lower surfaces of the mating ring. A protective pad is fixedly connected to the inner surface of the inner ring.

[0010] Two fixing mechanisms are symmetrically arranged on the outer surface of the outer ring.

[0011] The present invention is further configured such that: the fixing mechanism includes a fixing block, a fixing bolt is movably connected to the surface of the fixing block away from the fixing groove, a ratchet is fixedly sleeved on the outside of the fixing bolt, and a locking element is provided on the surface of the fixing block away from the fixing groove and located on the right side of the fixing bolt.

[0012] The present invention is further configured such that: the locking component includes a spring, and a pawl and a locking block are respectively fixed to the left and right ends of the spring; a locking rod is rotatably connected to the end of the pawl away from the fixing bolt.

[0013] The present invention is further configured such that: the outer surface of the outer ring is movably attached to the inner surface of the bearing outer ring, the mating ring is movably located inside the mating groove, one end of the ball located outside the mating ring is movably attached to the inner surface of the mating groove, and the protective pad is movably attached to the outer surface of the bearing inner ring.

[0014] The present invention is further configured such that: the fixing block is movably located inside the fixing groove, and the fixing block is fixed to the outer surface of the outer ring; one end of the fixing bolt is threaded to the lower inner surface of the fixing groove.

[0015] The present invention is further configured such that: the pawl is engaged with the ratchet, and the locking block and the locking rod are both fixed to the side surface of the fixing block away from the fixing groove.

[0016] The technical effects achieved by this utility model are as follows:

[0017] This utility model discloses a novel secondary filter bearing. The outer ring of the protective mechanism is tightly fitted with the inner side of the bearing outer ring to form the first radial sealing barrier. The inner ring achieves low-friction relative rotation with the outer ring through the rolling of the ball of the mating ring in the mating groove. At the same time, the protective pad of the inner ring is pressed against the outer surface of the bearing inner ring with constant pressure to form the second end face dynamic seal. The dual protection works together to prevent impurities in the water from entering the bearing rolling area, so as to realize the long-term maintenance-free operation of the bearing in water containing impurities.

[0018] The fixing mechanism uses a fixing bolt screwed into the fixing groove to achieve rigid locking of the protective mechanism. The meshing design of the ratchet and pawl completely eliminates the need for the fixing bolt to loosen counterclockwise due to running vibration, and the fixing mechanism is completely embedded in the fixing groove without any protruding structure. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of an embodiment of this utility model;

[0020] Figure 2 This is a schematic diagram of the bearing outer ring and bearing inner ring according to an embodiment of this utility model;

[0021] Figure 3 This is a schematic diagram of the protective mechanism of this utility model embodiment;

[0022] Figure 4 This is a partial cross-sectional view of the outer and inner rings of an embodiment of this utility model;

[0023] Figure 5 This is a schematic diagram of the fixing mechanism in an embodiment of this utility model;

[0024] Figure 6 This is a schematic diagram of the locking component in an embodiment of this utility model.

[0025] The attached diagram lists the components represented by each number as follows:

[0026] 1. Bearing outer ring; 2. Bearing inner ring; 3. Fixing groove; 4. Protective mechanism; 5. Outer ring; 6. Inner ring; 7. Connecting groove; 8. Connecting ring; 9. Ball; 10. Protective pad; 11. Fixing mechanism; 12. Fixing block; 13. Fixing bolt; 14. Ratchet; 15. Locking element; 16. Spring; 17. Pawl; 18. Locking block; 19. Locking rod. Detailed Implementation

[0027] To make the purpose and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific implementations of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.

[0028] like Figure 1 and Figure 2 As shown, a novel secondary filter bearing includes an outer bearing ring 1 and an inner bearing ring 2 rotatably connected to the inner side of the outer bearing ring 1.

[0029] The inner ring 2 of the bearing is fixed to the outside of the rotating shaft of the filter element (rotating filter cylinder or screen core) in the secondary filter screen, thereby bearing the additional load brought by the weight of the filter element itself, the internal water pressure, and the impact force of the water flow, and ensuring that the filter element rotates smoothly and concentrically.

[0030] like Figure 1-4 As shown, two fixing grooves 3 extending to the inner side are symmetrically opened on the upper and lower surfaces of the outer ring 1 of the bearing, and protective mechanisms 4 are provided at the upper and lower ends between the outer ring 1 and the inner ring 2 of the bearing.

[0031] The protective mechanism 4 includes an outer ring 5, the outer surface of which is movably attached to the inner surface of the outer ring 1 of the bearing, an inner ring 6 is movably attached to the inner side of the outer ring 5, and a mating groove 7 is provided on the inner surface of the outer ring 5. A mating ring 8 is fixedly sleeved on the outer surface of the inner ring 6. The mating ring 8 is movably located inside the mating groove 7. Multiple round beads 9 are evenly embedded and rolled on both the upper and lower surfaces of the mating ring 8. One end of the round bead 9 located outside the mating ring 8 is movably attached to the inner surface of the mating groove 7. A protective pad 10 is fixedly attached to the inner surface of the inner ring 6. The protective pad 10 is movably attached to the outer surface of the inner ring 2 of the bearing.

[0032] The outer ring 5, inner ring 6 and protective pad 10 work together to prevent impurities in the water (mud, sand, debris, etc.) from entering the area between the outer ring 1 and inner ring 2 of the bearing and causing wear on rotating parts (such as balls).

[0033] An O-ring groove can be added to the contact surface between the outer ring 5 and the bearing outer ring 1 to embed a fluororubber O-ring and form a static seal.

[0034] The interference fit between the protective pad 10 and the inner ring 2 of the bearing is 0.3-0.5mm, which provides sufficient compressive force to the inner ring 2 of the bearing. The preferred material for the pad is polyetheretherketone, which has high wear resistance.

[0035] The protective pad 10 is cured on the inner side of the inner ring 6 by high temperature hot pressing.

[0036] like Figure 2 , Figure 3 , Figure 5 and Figure 6 As shown, two fixing mechanisms 11 are symmetrically arranged on the outer surface of the outer ring 5. The fixing mechanism 11 includes a fixing block 12, which is movably located inside the fixing groove 3 and is fixed to the outer surface of the outer ring 5. A fixing bolt 13 is movably connected to the side surface of the fixing block 12 away from the fixing groove 3. One end of the fixing bolt 13 is threaded to the lower inner surface of the fixing groove 3. A ratchet 14 is fixedly sleeved on the outside of the fixing bolt 13. A locking member 15 is arranged on the side surface of the fixing block 12 away from the fixing groove 3 and on the right side of the fixing bolt 13. The locking member 15 includes a spring 16. A pawl 17 and a locking block 18 are fixedly connected to the left and right ends of the spring 16, respectively. The pawl 17 is attached to the ratchet 14. A locking rod 19 is rotatably connected to the end of the pawl 17 away from the fixing bolt 13. The locking block 18 and the locking rod 19 are both fixed to the side surface of the fixing block 12 away from the fixing groove 3.

[0037] Rotating the fixing bolt 13 clockwise can fix the fixing block 12 into the fixing groove 3, thereby fixing the entire protective mechanism 4 between the outer ring 1 and the inner ring 2 of the bearing;

[0038] After installation, the fixing mechanism 11 is located in the fixing groove 3 and does not protrude from the fixing groove 3;

[0039] Ratchet 14 is welded to the outside of the end of retaining bolt 13 near the end cap;

[0040] Pawl 17 engages with ratchet 14, allowing ratchet 14 and retaining bolt 13 to rotate clockwise normally but not counterclockwise, thus preventing retaining bolt 13 from loosening; after pulling pawl 17 away from ratchet 14, ratchet 14 and retaining bolt 13 can rotate counterclockwise.

[0041] The working principle of this utility model is as follows: When installing the protective mechanism 4, first align the outer ring 5 with the fixing groove 3 of the outer ring 1 of the bearing and insert it, so that the fixing block 12 enters the fixing groove 3; pull the pawl 17 to disengage it from the ratchet 14, and rotate the fixing bolt 13 clockwise so that its threaded end is screwed into the threaded hole of the fixing groove 3. When the pawl 17 is facing the tooth surface of the ratchet 14, release the pawl 17 and the pawl 17 is engaged in the tooth gap of the ratchet 14; continue to tighten the fixing bolt 13 clockwise until the fixing block 12 is completely pressed into the fixing groove 3. At this time, the ratchet 14 is locked by the pawl 17 to prevent the fixing bolt 13 from loosening counterclockwise, thus achieving the rigid fixation of the protective mechanism 4.

[0042] When the bearing is connected to the secondary filter screen, the inner ring 2 of the bearing is sleeved on the filter cylinder shaft and fixed with bolts, bearing the weight of the filter cylinder, water pressure and water flow impact load; the outer ring 1 of the bearing is fixed on the secondary filter screen housing support; during operation, the rotation of the filter cylinder drives the inner ring 2 of the bearing to rotate synchronously, the outer ring 5 of the protective mechanism 4 is kept stationary with the outer ring 1 of the bearing through the fixing block 12, and the inner ring 6 achieves low-resistance relative movement with the outer ring 5 by the rolling of the ball 9 of the docking ring 8 in the docking groove 7; the protective pad 10 is attached to the outer surface of the inner ring 2 of the bearing with constant pressure to prevent impurities in the water from entering the bearing rolling element area.

[0043] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the art.

Claims

1. A novel secondary filter bearing, characterized in that: It includes an outer bearing ring (1) and an inner bearing ring (2) rotatably connected to the inner side of the outer bearing ring (1). The upper and lower surfaces of the outer bearing ring (1) are symmetrically provided with two fixing grooves (3) extending to the inner side. Protective mechanisms (4) are provided at the upper and lower ends between the outer bearing ring (1) and the inner bearing ring (2). The protective mechanism (4) includes an outer ring (5), an inner ring (6) is movably fitted to the inner side of the outer ring (5), and a mating groove (7) is opened on the inner surface of the outer ring (5). A mating ring (8) is fixedly sleeved on the outer surface of the inner ring (6). Multiple round beads (9) are evenly embedded and rolled on both the upper and lower surfaces of the mating ring (8). A protective pad (10) is fixedly connected to the inner surface of the inner ring (6). Two fixing mechanisms (11) are symmetrically arranged on the outer surface of the outer ring (5).

2. The novel secondary filter bearing according to claim 1, characterized in that: The fixing mechanism (11) includes a fixing block (12), a fixing bolt (13) is movably connected to the side surface of the fixing block (12) away from the fixing groove (3), a ratchet (14) is fixedly sleeved on the outside of the fixing bolt (13), and a locking member (15) is provided on the side surface of the fixing block (12) away from the fixing groove (3) and on the right side of the fixing bolt (13).

3. The novel secondary filter bearing according to claim 2, characterized in that: The locking component (15) includes a spring (16), with a pawl (17) and a locking block (18) fixedly connected to the left and right ends of the spring (16), respectively. A locking rod (19) is rotatably connected to the end of the pawl (17) away from the fixing bolt (13).

4. The novel secondary filter bearing according to claim 1, characterized in that: The outer surface of the outer ring (5) is movably attached to the inner surface of the outer ring (1) of the bearing. The mating ring (8) is movably located inside the mating groove (7). One end of the ball (9) located outside the mating ring (8) is movably attached to the inner surface of the mating groove (7). The protective pad (10) is movably attached to the outer surface of the inner ring (2) of the bearing.

5. A novel secondary filter bearing according to claim 2, characterized in that: The fixing block (12) is movably located inside the fixing groove (3), and the fixing block (12) is fixed to the outer surface of the outer ring (5). One end of the fixing bolt (13) is threaded to the lower inner surface of the fixing groove (3).

6. A novel secondary filter bearing according to claim 3, characterized in that: The pawl (17) is attached to the ratchet (14), and the locking block (18) and the locking rod (19) are both fixed to the side surface of the fixing block (12) away from the fixing groove (3).

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