An automatic oil replenishing bearing box for large fans

Abstract

The present invention belongs to the field of bearing technology, and discloses an automatic oil replenishing bearing box for large-scale fans, including an outer ring seat, the inner cavity of the outer ring seat is movably connected with a sealing roller and an inner ring body, the top of the inner ring body is fixedly connected with an oil replenishing box, the left side of the inner cavity of the oil replenishing box is fixedly connected with a long tube, the bottom of the inner cavity of the outer ring seat is fixedly connected with a circulation device, and the inner cavity on the left side of the top of the circulation device is fixedly connected with a connecting pipe. The present invention makes it easy to collect and reuse the overflowed lubricating oil through the oil replenishing box, the long tube, the circulation device, the connecting pipe and the one-way valve. When the fan shaft rotates, the sealing extrusion block allows the lubricating oil in the inner cavity of the oil collecting block to enter the inner cavity of the oil replenishing box through the connecting pipe, the one-way valve and the long tube, so that the device has the effect of collecting and recycling the excess overflowed lubricating oil, thereby reducing the waste of lubricating oil.

Description

Technical Field

[0001] The invention belongs to the technical field of bearings, in particular to an automatic oil replenishing bearing box for a large-scale fan. Background Art

[0002] Bearings are an important component in modern mechanical equipment. Their main function is to support the mechanical rotating body, reduce the friction coefficient during its movement, and ensure its rotation accuracy.

[0003] At present, automatic oil-replenishing bearings are often needed in the use of large fans. The existing automatic oil-replenishing shafts are often formed by opening holes in the outer ring body, injecting lubricating oil from the holes, and rotating the inner ring body and the outer ring body to replenish the oil inside the bearing. However, during the operation of the existing bearings, the rotational friction between the internal sealing roller and the inner ring causes the lubricating oil to overflow from the gap. As the internal grease decreases, the friction resistance of the internal sealing roller increases, thereby damaging the bearing and affecting the normal operation of the fan. Therefore, an automatic oil-replenishing bearing box for large fans is proposed to solve the problems raised in the background technology. Summary of the invention

[0004] In order to solve the problems raised in the above background technology, the present invention provides an automatic oil replenishing bearing box for a large fan, which has the advantages of facilitating the collection of spilled lubricating oil and reusing it and automatically replenishing the oil.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an automatic oil replenishment bearing box for a large fan, comprising an outer ring seat, the inner cavity of the outer ring seat is movably connected with a sealing roller and an inner ring body, the top of the inner ring body is fixedly connected with an oil replenishment tank, the left side of the inner cavity of the oil replenishment tank is fixedly connected with a long tube, the bottom of the inner cavity of the outer ring seat is fixedly connected with a circulation device, the inner cavity on the left side of the top of the circulation device is fixedly connected with a connecting pipe, and the top of the connecting pipe is fixedly connected with a one-way valve;

[0006] The circulation device includes an oil collecting block, the inner cavity of the oil collecting block is movably connected with a reciprocating screw, the outer surface of the reciprocating screw is movably connected with a moving block, the inner cavity at the left top of the moving block is movably connected with a limiting block, the left side of the outer surface of the moving block is movably connected with a sealing extrusion block, the right side of the sealing extrusion block is fixedly connected with a first tension spring, the right side of the outer surface of the reciprocating screw is fixedly connected with a first transmission wheel, the outer surface of the first transmission wheel is transmission-connected with a transmission belt, the right side of the inner cavity of the outer ring seat is movably connected with a second transmission wheel, the left side of the second transmission wheel is fixedly connected with a gear, and the left side of the inner cavity of the oil collecting block is fixedly connected with a circular hole plate.

[0007] In the above technical solution, preferably, an oil replenishing block is movably connected to the middle of the inner cavity at the top of the outer ring seat, and a second tension spring is fixedly connected to the lower surface of the oil replenishing block.

[0008] In the above technical solution, preferably, a U-shaped tube is fixedly connected to the middle part of the inner cavity at the top of the oil replenishing tank, a buoyancy block is movably connected to the inner cavity on the left side of the U-shaped tube, a sealing block is movably connected to the right side of the inner cavity of the U-shaped tube, and a transparent plate is fixedly connected to the right side of the inner cavity of the U-shaped tube.

[0009] In the above technical solution, preferably, the number of the sealing rollers is twelve, and the twelve sealing rollers are equiangularly movably connected to the inner cavity of the outer ring seat, the outer surface of the inner ring body is located between the twelve sealing rollers, and an oil collecting hole is opened at the bottom of the inner cavity of the outer ring seat, and the middle part of the top of the oil collecting block is connected to the oil collecting hole.

[0010] In the above technical solution, preferably, the outer surface of the bottom of the limiting block is adapted to the threaded groove inside the reciprocating screw, a sliding groove is provided at the bottom of the inner cavity of the oil collecting block, and a long strip block is fixedly connected to the bottom of the sealing extrusion block, and the inner cavity of the sliding groove is adapted to the outer surface of the long strip block.

[0011] In the above technical solution, preferably, the right end of the first tension spring is fixedly connected to the left side of the inner cavity of the oil collecting block, and the right side of the first tension spring passes through the right side of the oil collecting block and extends to the inner cavity of the outer ring seat and is movably connected to the right side of the inner cavity of the outer ring seat.

[0012] In the above technical solution, preferably, the inner cavity of the inner ring body is fixedly connected to the fan shaft, the inner cavity of the gear and the second transmission wheel is fixedly connected to a circular shaft, the left end of the circular shaft is fixedly connected to the inner cavity of the inner ring body, and the right end of the circular shaft is movably connected to the inner cavity of the outer ring seat, the second transmission wheel and the first transmission wheel are connected by a transmission belt, and the right side of the outer surface of the inner ring body is fixedly connected to an annular tooth block, and the lower surface of the annular tooth block is meshed with the upper surface of the gear.

[0013] In the above technical solution, preferably, the inner cavity of the circular hole plate is movably connected to the left side of the outer surface of the reciprocating screw rod, and the top of the one-way valve is fixedly connected to the bottom of the long tube.

[0014] In the above technical solution, preferably, the bottom of the second tension spring is fixedly connected to the bottom of the inner cavity of the outer ring seat, a connecting groove is opened in the middle of the inner cavity of the oil filling block, and oil filling holes are opened at equal angles in the inner cavity in the middle and bottom of the oil filling block, and the oil filling holes are communicated with the connecting groove.

[0015] In the above technical solution, preferably, the diameter of the U-shaped tube inner cavity below the buoyancy block and above the top oil replenishment tank is smaller than the diameter of the buoyancy block, and the diameter of the inner cavity above the sealing block and at the bottom of the right side of the U-shaped tube is smaller than the diameter of the sealing block.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The present invention uses an oil replenishing tank, a long tube, a circulation device, a connecting pipe and a one-way valve to make the device easy to collect and reuse the escaped lubricating oil, and introduces the excess escaped lubricating oil into the inner cavity of the oil collecting block through the oil collecting hole. At the same time, when the fan shaft rotates, it will drive the inner ring body to rotate, and then the annular tooth block will rotate, and then the gear meshing therewith will rotate, thereby driving the second transmission wheel and the transmission belt to rotate, and then the first transmission wheel drives the reciprocating screw to rotate. Due to the rotation of the reciprocating screw, the reciprocating screw, the moving block and the limiting block move to the left, so that the sealing extrusion block allows the lubricating oil in the inner cavity of the oil collecting block to enter the inner cavity of the oil replenishing tank through the connecting pipe, the one-way valve and the long tube, so that the device has the effect of collecting and recycling the excess overflowed lubricating oil, thereby reducing the waste of lubricating oil.

[0018] 2. The present invention enables the device to have an automatic oil filling effect through the cooperation of the oil filling block, the second tension spring, the oil filling hole and the connecting groove. The inner ring body is driven to rotate by the fan shaft, and then the sealing roller rotates with the fan shaft as the axis, so that the outer surface of the sealing roller contacts the bottom of the oil filling block, thereby lifting the oil filling block, and then the lubricating oil enters from the opening at the top of the sealing roller, enters into the connecting groove through the oil filling hole above, and then enters into the inner cavity of the outer ring seat from the oil filling hole below, thereby realizing the automatic oil filling effect of the device and facilitating the use of the operator.

[0019] 3. The present invention cooperates with a U-shaped tube, a buoyancy block, a sealing block and a transparent plate so that the device has the effect of facilitating observation of the remaining lubricating oil in the oil replenishing tank. Through the action of the U-shaped tube, when there is a lot of internal lubrication in the oil replenishing tank, the lubricating oil will cause the buoyancy block to float, and the sealing block will be moved downward by the action of air pressure. Since the diameters of the inner cavities above and below the buoyancy block and the sealing block are set to be smaller than the diameters of the buoyancy block and the sealing block, respectively, the buoyancy block and the sealing block are prevented from moving out, thereby allowing personnel to observe the amount of internal lubricating oil through the transparent plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 for Figure 1 The enlarged view of point A in the middle;

[0022] Figure 3 It is a schematic diagram of the side cross-sectional structure of the present invention;

[0023] Figure 4 for Figure 3 The enlarged view of point B in the middle;

[0024] Figure 5 for Figure 3 Enlarged view of point C in the middle;

[0025] Figure 6 It is a structural schematic diagram of the sealing roller of the present invention;

[0026] Figure 7 It is a schematic cross-sectional structure diagram of the sealing roller of the present invention;

[0027] Figure 8 An exploded view of the first tension spring of the present invention;

[0028] Fig. 9 for Figure 8 Schematic diagram of the enlarged structure at D in the middle;

[0029] Fig.10 It is a schematic diagram of the back structure of the present invention.

[0030] In the figure: 1. outer ring seat; 2. sealing roller; 3. inner ring body; 4. oil supply tank; 5. long tube; 6. circulation device; 601. oil collecting block; 602. reciprocating screw rod; 603. moving block; 604. limiting block; 605. sealing extrusion block; 606. first tension spring; 607. first transmission wheel; 608. second transmission wheel; 609. transmission belt; 610. gear; 611. circular hole plate; 7. connecting pipe; 8. one-way valve; 9. oil supply block; 10. second tension spring; 11. U-shaped tube; 12. buoyancy block; 13. sealing block; 14. transparent plate. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] like Figures 1 to 10As shown, the present invention provides an automatic oil replenishing bearing box for a large fan, comprising an outer ring seat 1, the inner cavity of the outer ring seat 1 is movably connected with a sealing roller 2 and an inner ring body 3, the top of the inner ring body 3 is fixedly connected with an oil replenishing tank 4, the left side of the inner cavity of the oil replenishing tank 4 is fixedly connected with a long tube 5, the bottom of the inner cavity of the outer ring seat 1 is fixedly connected with a circulation device 6, the inner cavity on the left side of the top of the circulation device 6 is fixedly connected with a connecting pipe 7, and the top of the connecting pipe 7 is fixedly connected with a one-way valve 8;

[0033] The circulation device 6 includes an oil collecting block 601, the inner cavity of the oil collecting block 601 is movably connected with a reciprocating screw 602, the outer surface of the reciprocating screw 602 is movably connected with a moving block 603, the inner cavity at the left top of the moving block 603 is movably connected with a limiting block 604, the left side of the outer surface of the moving block 603 is movably connected with a sealing extrusion block 605, the right side of the sealing extrusion block 605 is fixedly connected with a first tension spring 606, the right side of the outer surface of the reciprocating screw 602 is fixedly connected with a first transmission wheel 607, the outer surface of the first transmission wheel 607 is transmission-connected with a transmission belt 609, the right side of the inner cavity of the outer ring seat 1 is movably connected with a second transmission wheel 608, the left side of the second transmission wheel 608 is fixedly connected with a gear 610, and the left side of the inner cavity of the oil collecting block 601 is fixedly connected with a circular hole plate 611;

[0034] The overflowed lubricating oil is introduced into the inner cavity of the oil collecting block 601 through the oil collecting hole. At the same time, when the fan shaft rotates, it will drive the inner ring body 3 to rotate, and then the annular tooth block will rotate, and then the gear 610 meshing therewith will rotate, thereby driving the second transmission wheel 608 and the transmission belt 609 to rotate, and then the first transmission wheel 607 drives the reciprocating screw 602 to rotate. Due to the rotation of the reciprocating screw 602, the reciprocating screw 602, the moving block 603 and the limiting block 604 move to the left, so that the sealing extrusion block 605 allows the lubricating oil in the inner cavity of the oil collecting block 601 to enter the inner cavity of the oil replenishing tank 4 through the connecting pipe 7, the one-way valve 8 and the long tube 5, so that the device has the effect of collecting and recycling excess overflowed lubricating oil, thereby reducing the waste of lubricating oil.

[0035] like Figure 3 , Figure 6 , Figure 7 As shown, the number of sealing rollers 2 is twelve, and the twelve sealing rollers 2 are equiangularly movably connected to the inner cavity of the outer ring seat 1, and the outer surface of the inner ring body 3 is located between the twelve sealing rollers 2. An oil collecting hole is opened at the bottom of the inner cavity of the outer ring seat 1, and the middle part of the top of the oil collecting block 601 is connected to the oil collecting hole;

[0036] The above solution is adopted: through the design of the oil collecting hole, the oil collecting hole has the function of collecting the lubricating oil overflowing from the inner cavity of the outer ring seat 1 due to the rotation of the inner ring body 3 and the sealing roller 2.

[0037] like Figure 4 , Figure 7 , Fig. 9 As shown, the outer surface of the bottom of the limiting block 604 is matched with the thread groove inside the reciprocating screw 602, a slide groove is provided at the bottom of the inner cavity of the oil collecting block 601, and a long strip is fixedly connected to the bottom of the sealing extrusion block 605, and the inner cavity of the slide groove is matched with the outer surface of the long strip;

[0038] The above scheme is adopted: through the cooperation between the limiting block 604 and the thread of the reciprocating screw 602, and due to the limiting effect between the slide groove and the long strip block, when the reciprocating screw 602 rotates, the moving block 603 drives the limiting block 604 to move left and right, thereby squeezing and transporting the lubricating oil in the inner cavity of the outer ring seat 1.

[0039] like Figure 4 As shown, the right end of the first tension spring 606 is fixedly connected to the left side of the inner cavity of the oil collecting block 601, and the right side of the first tension spring 606 passes through the right side of the oil collecting block 601 and extends to the inner cavity of the outer ring seat 1 and is movably connected to the right side of the inner cavity of the outer ring seat 1;

[0040] The above scheme is adopted: when the sealing extrusion block 605 is on the left side of the inner cavity of the oil collecting block 601, the first tension spring 606 is in a stretched state. At this time, the right side of the sealing extrusion block 605 will collect the lubricating oil from the oil collecting hole. At this time, the oil collecting block 601 moves to the right. Due to the effect of pressure, when the moving block 603 moves to the right, the sealing extrusion block 605 moves to the left, so that the grease on the right side of the sealing extrusion block 605 overflows to the left side of the sealing extrusion block 605. At this time, due to the tension of the first tension spring 606, the sealing extrusion block 605 will be reset to facilitate the next cycle.

[0041] like Figure 1 , Figure 6 , Figure 8 As shown, the inner cavity of the inner ring body 3 is fixedly connected with the fan shaft, the inner cavities of the gear 610 and the second transmission wheel 608 are fixedly connected with a circular shaft, the left end of the circular shaft is fixedly connected with the inner cavity of the inner ring body 3, and the right end of the circular shaft is movably connected with the inner cavity of the outer ring seat 1, the second transmission wheel 608 and the first transmission wheel 607 are transmission-connected by a transmission belt 609, and the right side of the outer surface of the inner ring body 3 is fixedly connected with an annular tooth block, and the lower surface of the annular tooth block is meshed with the upper surface of the gear 610;

[0042] The above solution is adopted: the inner ring body 3 and the annular tooth block are driven to rotate by the rotation of the fan shaft, and then the gear 610 drives the second transmission wheel 608 and the transmission belt 609 to rotate, thereby causing 707 and the reciprocating screw 602 to rotate.

[0043] like Figure 3 , Figure 6 , Fig.10 As shown, the inner cavity of the circular orifice plate 611 is movably connected to the left side of the outer surface of the reciprocating screw rod 602, and the top of the one-way valve 8 is fixedly connected to the bottom of the long tube 5; the connecting pipe 7 is connected to the long tube 5 through the one-way valve 8, and the lubricating oil in the inner cavity of the oil collecting block 601 is injected into the inner cavity of the oil replenishing tank 4 through the connecting pipe 7 and the one-way valve 8 and the long tube 5;

[0044] The above scheme is adopted: when the lubricating oil from the inner cavity of the oil collecting block 601 is introduced through the connecting pipe 7 and the one-way valve 8, the lubricating oil is blocked in the inner cavity of the long tube 5 above the one-way valve 8 due to the action of the one-way valve 8. When the circulation device 6 circulates, the lubricating oil will be injected into the inner cavity of the oil replenishing tank 4 again through the long tube 5, thereby realizing the recycling of the lubricating oil.

[0045] like Figure 5 As shown, the bottom of the second tension spring 10 is fixedly connected to the bottom of the inner cavity of the outer ring seat 1, a connecting groove is opened in the middle of the inner cavity of the oil filling block 9, and oil filling holes are opened at equal angles in the inner cavity of the middle and bottom of the oil filling block 9, and the oil filling holes are connected to the connecting groove;

[0046] The above scheme is adopted: the inner ring body 3 is driven to rotate by the fan shaft, and then the sealing roller 2 is rotated with the fan shaft as the axis, so that the outer surface of the sealing roller 2 contacts the bottom of the oil filling block 9, thereby lifting the oil filling block 9, and then the lubricating oil enters from the opening at the top of the sealing roller 2, enters into the connecting groove through the oil filling hole above, and then enters into the inner cavity of the outer ring seat 1 from the oil filling hole below, thereby realizing the automatic oil filling effect of the device. When the bottom of the oil filling block 9 is in the gap between the two buoyancy blocks 12, the oil filling block 9 is closed due to the tension of the second tension spring 10, thereby stopping the oil filling.

[0047] like Figure 2 , Figure 5 As shown, the inner diameter of the U-shaped tube 11 below the buoyancy block 12 and above the top oil replenishment tank 4 is smaller than the diameter of the buoyancy block 12, and the diameter of the inner bottom of the upper portion of the sealing block 13 and the right side of the U-shaped tube 11 is smaller than the diameter of the sealing block 13;

[0048] The above scheme is adopted: through the action of the U-shaped tube 11, when there is a lot of internal lubrication in the oil replenishing tank 4, the lubricating oil will make the buoyancy block 12 float, and through the action of air pressure, the sealing block 13 will move downward, making it easier for personnel to observe the amount of internal lubricating oil. At the same time, the diameters of the inner cavities above and below the buoyancy block 12 and the sealing block 13 are set to be smaller than the diameters of the buoyancy block 12 and the sealing block 13, respectively, so as to prevent the buoyancy block 12 and the sealing block 13 from moving out, thereby facilitating the use of the operator.

[0049] The working principle and use process of the present invention:

[0050] The excess lubricating oil is introduced into the inner cavity of the oil collecting block 601 through the oil collecting hole. At the same time, when the fan shaft rotates, the inner ring body 3 will be driven to rotate, and then the annular tooth block will be driven to rotate, and then the gear 610 meshing therewith will be driven to rotate, thereby driving the second transmission wheel 608 and the transmission belt 609 to rotate, and then the first transmission wheel 607 drives the reciprocating screw 602 to rotate. Due to the rotation of the reciprocating screw 602, the reciprocating screw 602, the moving block 603 and the limiting block 604 move left and right in a circular motion, so that the sealing extrusion block 605 allows the lubricating oil in the inner cavity of the oil collecting block 601 to enter the inner cavity of the oil replenishing tank 4 through the connecting pipe 7, the one-way valve 8 and the long pipe 5, so that the overflowed lubricating oil is collected and recycled. The inner ring body 3 is driven to rotate by the fan shaft, so that the sealing roller 2 rotates with the fan shaft as the axis, so that the outer surface of the sealing roller 2 contacts the bottom of the oil filling block 9, so that the oil filling block 9 is lifted up, and the lubricating oil enters from the opening at the top of the sealing roller 2, enters into the connecting groove through the upper oil filling hole, and then enters into the inner cavity of the outer ring seat 1 from the lower oil filling hole, thereby realizing automatic oil filling of the device. Through the action of the U-shaped tube 11, when there is a lot of internal lubrication in the oil filling tank 4, the lubricating oil will make the buoyancy block 12 float, and the sealing block 13 will move downward through the action of air pressure. Since the diameters of the inner cavities above and below the buoyancy block 12 and the sealing block 13 are set smaller than the diameters of the buoyancy block 12 and the sealing block 13, respectively, the buoyancy block 12 and the sealing block 13 are prevented from moving out, so that personnel can observe the amount of internal lubricating oil through the transparent plate 14.

[0051] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0052] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic oil replenishing bearing box for a large fan, comprising an outer ring seat (1), characterized in that: The inner cavity of the outer ring seat (1) is movably connected to a sealing roller (2) and an inner ring body (3); the top of the inner ring body (3) is fixedly connected to an oil replenishing tank (4); the left side of the inner cavity of the oil replenishing tank (4) is fixedly connected to a long tube (5); the bottom of the inner cavity of the outer ring seat (1) is fixedly connected to a circulation device (6); the left side of the top of the inner cavity of the circulation device (6) is fixedly connected to a connecting pipe (7); and the top of the connecting pipe (7) is fixedly connected to a one-way valve (8); The circulation device (6) comprises an oil collecting block (601), the inner cavity of the oil collecting block (601) is movably connected to a reciprocating screw (602), the outer surface of the reciprocating screw (602) is movably connected to a moving block (603), the left side of the moving block (603) is movably connected to a limiting block (604), the upper left side of the moving block (603) is movably connected to a sealing extrusion block (605), the right side of the sealing extrusion block (605) is fixedly connected to a first tension spring (606), the right side of the outer surface of the reciprocating screw (602) is fixedly connected to a first transmission wheel (607), the outer surface of the first transmission wheel (607) is transmission-connected to a transmission belt (609), the right side of the inner cavity of the outer ring seat (1) is movably connected to a second transmission wheel (608), the left side of the second transmission wheel (608) is fixedly connected to a gear (610), and the left side of the oil collecting block (601) is fixedly connected to a circular hole plate (611); The inner cavity of the inner ring body (3) is fixedly connected to the fan shaft, the inner cavities of the gear (610) and the second transmission wheel (608) are fixedly connected to a circular shaft, the left end of the circular shaft is fixedly connected to the inner cavity of the inner ring body (3), and the right end of the circular shaft is movably connected to the inner cavity of the outer ring seat (1), the second transmission wheel (608) and the first transmission wheel (607) are connected in transmission via a transmission belt (609), and the right side of the outer surface of the inner ring body (3) is fixedly connected to an annular tooth block, and the lower surface of the annular tooth block is meshed with the upper surface of the gear (610).

2. The automatic oil replenishing bearing box for a large fan according to claim 1 is characterized in that: An oil replenishing block (9) is movably connected to the middle of the inner cavity at the top of the outer ring seat (1), and a second tension spring (10) is fixedly connected to the lower surface of the oil replenishing block (9).

3. The automatic oil replenishing bearing box for a large fan according to claim 1 is characterized in that: A U-shaped tube (11) is fixedly connected to the middle of the inner cavity at the top of the oil replenishment tank (4), a buoyancy block (12) is movably connected to the inner cavity on the left side of the U-shaped tube (11), a sealing block (13) is movably connected to the right side of the inner cavity of the U-shaped tube (11), and a transparent plate (14) is fixedly connected to the right side of the inner cavity of the U-shaped tube (11).

4. The automatic oil replenishing bearing box for a large fan according to claim 1 is characterized in that: The number of the sealing rollers (2) is twelve, and the twelve sealing rollers (2) are movably connected at equal angles in the inner cavity of the outer ring seat (1). The outer surface of the inner ring body (3) is located between the twelve sealing rollers (2). An oil collecting hole is provided at the bottom of the inner cavity of the outer ring seat (1), and the middle of the top of the oil collecting block (601) is connected to the oil collecting hole.

5. The automatic oil replenishing bearing box for a large fan according to claim 1 is characterized in that: The outer surface of the bottom of the limiting block (604) is matched with the thread groove of the reciprocating screw (602), the bottom of the inner cavity of the oil collecting block (601) is provided with a slide groove, the bottom of the sealing extrusion block (605) is fixedly connected with a long strip block, and the inner cavity of the slide groove is matched with the outer surface of the long strip block.

6. The automatic oil replenishing bearing box for a large fan according to claim 1 is characterized in that: The inner cavity of the circular hole plate (611) is movably connected to the left side of the outer surface of the reciprocating screw rod (602), and the top of the one-way valve (8) is fixedly connected to the bottom of the long tube (5).

7. The automatic oil replenishing bearing box for a large fan according to claim 2 is characterized in that: The bottom of the second tension spring (10) is fixedly connected to the bottom of the inner cavity of the outer ring seat (1); a connecting groove is provided in the middle of the inner cavity of the oil replenishing block (9); oil filling holes are provided at equal angles in the inner cavity of the middle and bottom of the oil replenishing block (9); and the oil filling holes are connected to the connecting groove.

8. The automatic oil replenishing bearing box for a large fan according to claim 3 is characterized in that: The inner diameter of the U-shaped tube (11) below the buoyancy block (12) and above the top oil replenishment tank (4) is smaller than the diameter of the buoyancy block (12), and the diameter of the inner bottom of the right side of the U-shaped tube (11) above the sealing block (13) is smaller than the diameter of the sealing block (13).

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