Fully sealed energy-saving silent bearings

Abstract

This fully sealed, energy-saving, and silent bearing features a labyrinth seal on one end face. The labyrinth seal's inlet features a V-shaped reverse seal, opening toward the labyrinth seal's inlet. The labyrinth seal's outlet features a V-shaped reverse seal, one branch extending in reverse to block the labyrinth seal's inlet and the other in reverse to block the labyrinth seal's connection to the retainer. The inner ring sealing lip of a single-layer contact seal on the other side is nestled within a groove in the bearing's inner ring. The retainer is made of engineering plastic. The labyrinth seal, with interlocking outer and inner sealing rings, creates a channel, resulting in low bearing noise, impurity resistance, and oil leakage, saving costs.

Description

Technical Field

[0001] The present invention belongs to the field of bearing technology in the field of mechanical manufacturing, and particularly relates to a fully sealed energy-saving and silent bearing. Background Art

[0002] In belt conveyors, especially large belt conveyors used in coal mines, rollers are a key component. Their function is to support the weight of the conveyor belt and the material. Rollers must operate flexibly and reliably, reducing friction between the conveyor belt and the rollers. This plays a key role in the life of the conveyor belt, which accounts for over 25% of the total cost of the conveyor. When the rollers are in operation, the outer ring of the bearing rotates while the inner ring remains relatively stationary. The low speed of the belt conveyor requires both the bearings and rollers to have a high load-bearing capacity.

[0003] The existing rollers and the original sealed bearings 23 include Figure 1 and Figure 2 As shown:

[0004] When sealing a bearing, multiple seals are required (isolation ring 22, original sealed bearing 23, retaining ring 24, outer sealing ring 25, inner sealing ring 26, end cover and shaft cover and other seals and their combination forms), which have high production costs, complex assembly, heavy weight, and high labor consumption.

[0005] When multiple seals are used, the original bearing seat 27 is in the shape of a long straight cylinder, and the original sealed bearing 23 is located deep in the original bearing seat 27, resulting in poor bearing capacity of the bearing roller.

[0006] The original sealed bearing 28 uses a rubber and skeleton sealing structure (single-layer rubber contact sealing structure 8). The sealing lip structure is simple and is easily opened to allow water, mud, sand, air and impurities to enter. In addition, the sealing lip is easily opened to cause oil leakage.

[0007] The metal cage of the bearing tends to heat up and make noise, and the end face of the bearing tends to rust. Summary of the Invention

[0008] The technical problem to be solved by the present invention is: in view of the shortcomings of the above-mentioned sealed bearings, a full-effect sealed energy-saving and silent bearing is provided, which has low noise, smoother operation and more perfect sealing lip structure, and does not allow impurities to enter and does not leak oil.

[0009] The technical solution adopted is:

[0010] This fully sealed, energy-saving, and silent bearing consists of an inner ring, an outer ring, a cage, and multiple balls. A cage is placed between the inner and outer rings, with balls contained within its pockets. A single-layer rubber contact seal is installed on one end face of the inner and outer rings.

[0011] The technical points are:

[0012] The other end faces of the bearing inner ring and the bearing outer ring are provided with a labyrinth sealing structure.

[0013] The entrance of the labyrinth sealing structure is provided with an entrance reverse sealing structure.

[0014] The outlet of the labyrinth sealing structure is provided with an outlet reverse sealing structure.

[0015] The inner ring sealing lip of the single-layer contact seal is arranged in the groove of the bearing inner ring.

[0016] The cage is made of engineering plastic.

[0017] The labyrinth sealing structure comprises a labyrinth sealing channel formed by an outer sealing ring and an inner sealing ring which are buckled together.

[0018] The inlet reverse seal structure is V-shaped, with the opening facing the inlet of the labyrinth seal.

[0019] The outlet reverse sealing structure is V-shaped, one branch extends in reverse to block the entrance of the labyrinth sealing structure, and the other branch reversely blocks the connection between the labyrinth sealing structure and the retaining frame.

[0020] The outer sealing ring comprises an outer sealing ring annular portion which is an integral structure, an outer sealing ring inner ring flange and an outer sealing ring outer ring flange which are bent on both sides.

[0021] The outer sealing ring is fixedly connected to the bearing inner ring.

[0022] The inner sealing ring comprises an inner sealing ring annular portion which is an integral structure, an inner sealing ring inner ring flange and an inner sealing ring outer ring flange which are bent on both sides.

[0023] The inner sealing ring is fixed to the outer ring of the bearing.

[0024] The elastic middle sealing ring comprises a middle sealing ring annular portion of an integrated structure, a middle sealing ring outer ring sealing lip bent at both sides, and a middle sealing ring inner ring extension portion.

[0025] The middle sealing ring is located between the outer sealing ring and the inner sealing ring and is fixedly connected to the inner sealing ring.

[0026] The sealing lip of the outer ring of the middle sealing ring extends toward the inlet of the labyrinth sealing structure to form an inlet reverse sealing structure.

[0027] The inner ring extension portion of the middle sealing ring extends toward the outlet of the labyrinth sealing structure to form an outlet reverse sealing structure.

[0028] The V-shaped angle of the inlet reverse sealing structure has an R angle of 45-60°.

[0029] An angle S formed between one branch of the outlet reverse seal structure and the radial sides of the bearing inner ring is 55-60°, and an angle T is 55-60°.

[0030] The angles R and T are 45°, 55° and 55°, respectively. Alternatively, the angles R and T are 60°, 60° and 60°, respectively. Alternatively, the angles R and T are 50°, 57° and 57°, respectively.

[0031] The end surface of the annular portion of the outer sealing ring is provided with a galvanized layer.

[0032] The sealing surface of the bearing outer ring is carbonized.

[0033] Its advantages are:

[0034] The engineering plastic cage has low noise and self-lubricating effect, which makes the operation smoother.

[0035] The bearings are galvanized and blackened to prevent rust.

[0036] The sealing lip structure is more perfect and will not be opened, water will not enter, and oil will not leak.

[0037] The bearings feature a built-in labyrinth seal structure, offering low manufacturing costs, simple assembly, and labor-saving advantages. External roller seals are not required. The first, second, and third sealing spaces are all designed with outward-facing, reversed barbs to prevent air, water, and impurities from entering the bearing, improving lubrication and anti-pollution properties.

[0038] Multiple seals on the outside of the bearing are eliminated, the bearing seat is shallower and shorter, and the bearing roller's load capacity is improved.

[0039] Integrating and simplifying the bearing seat and bearing assembly reduces the total weight of the roller, reduces inertia, and greatly reduces its energy consumption.

[0040] The installation time is simple, which reduces equipment and personnel, and reduces enterprise operating costs.

[0041] The bearing seat assembly does not require the addition of lubricating grease, reducing secondary contamination gaps.

[0042] It can operate in a wide temperature range of -45 degrees Celsius to 150 degrees Celsius, suitable for various conveying machinery working conditions.

[0043] After testing, it is found to comply with the MT821-2006 standard, the GB / T10595-2009 "Belt Conveyor" standard requirements, and the MT821-2006 "Technical Conditions for Belt Conveyor Rollers for Coal Mines". The total damping coefficient of the roller is reduced by about 40%, the operating noise is reduced by 20-30%, and the lubrication performance is improved by 20%. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 It is a structural diagram of the original roller.

[0045] Figure 2 It is a structural diagram of the original sealed bearing.

[0046] Figure 3 It is a structural schematic diagram of the roller of the present invention.

[0047] Figure 4 It is an enlarged schematic diagram of the roller, bearing and bearing seat of the present invention.

[0048] Figure 5 It is a structural schematic diagram of the bearing of the present invention.

[0049] Figure 6 yes Figure 5 A partial enlarged schematic diagram of the upper half.

[0050] Figure 7 It is a structural schematic diagram of the bearing seat of the present invention.

[0051] Figure 8 It is a schematic structural diagram of the bearing retainer of the present invention.

[0052] Figure 9 yes Figure 8 K-direction view in .

[0053] Figure 10 It is a schematic diagram of half of the structure of the retainer of the bearing of the present invention.

[0054] Figure 11 yes Figure 10 AA section view in.

[0055] Figure 12 yes Figure 10 BB cross-section view in.

[0056] Figure 13 This is a partial enlarged view of the labyrinth seal.

[0057] Bearing seat 1, roller 2, full-effect sealed energy-saving silent bearing 3, labyrinth seal structure 4, contact sealing lip 5, bearing inner ring 3-1, bearing outer ring 3-2, cage 3-3, ball 3-4, raceway 3-5, outer sealing ring 4-1, middle sealing ring 4-2, inner sealing ring 4-3, outer sealing ring annular portion 4-1-1, outer sealing ring inner ring flange 4-1-2, outer sealing ring outer ring flange 4-1-3, middle sealing ring annular portion 4-2-1, middle sealing ring outer ring sealing lip 4-2-2, middle sealing ring inner ring extension 4-2-3, inner sealing ring annular portion 4-3-1, inner sealing ring inner ring flange 4-3-2, inner sealing ring outer ring flange 4- 3-3, outlet reverse sealing structure 6, galvanized layer 7, single-layer rubber contact sealing structure 8, sealing cover 9, first groove of bearing outer ring 10, skeleton 8-1, single-layer contact sealing ring 8-2, wrapped sealing lip 11, inlet reverse sealing structure 12, first sealing space 13, second sealing space 14, third sealing space 15, second groove of bearing outer ring 16, groove of bearing inner ring 17, sealing cover reinforcement rib 18, sealing cover bearing inner ring annular rib 19, shoulder 20, gap 21, isolation ring 22, original sealed bearing 23, retaining ring 24, outer sealing ring 25, inner sealing ring 26, original bearing seat 27, sealing groove 28, support shaft 29. DETAILED DESCRIPTION

[0058] Example 1

[0059] The technical solution is described in detail below with reference to the accompanying drawings:

[0060] The supporting roller 2 and two bearing seats 1 with single-side openings.

[0061] The two bearing seats 1 are respectively arranged in the openings on both sides of the roller 2, with the openings of the bearing seats 1 facing outward, and the bearing seats 1 are welded and fixed to the roller 2.

[0062] Each bearing seat 1 is provided with a fully sealed, energy-saving and silent bearing 3 .

[0063] The fully sealed energy-saving silent bearing 3 comprises a bearing inner ring 3-1, a bearing outer ring 3-2, a retaining frame 3-3 and a plurality of balls 3-4.

[0064] A retainer 3-3 is provided between the bearing inner ring 3-1 and the bearing outer ring 3-2, and balls 3-4 are respectively provided in the pockets of the retainer 3-3. A raceway 3-5 corresponding to the balls 3-4 is provided between the bearing outer ring 3-2 and the bearing inner ring 3-1.

[0065] Cage 3-3 is made of engineering plastic (nylon) to reduce friction and improve lubrication performance (self-lubricating).

[0066] Nylon has good elasticity, low density, and small damping coefficient. It can better guide the rolling of balls 3-4 during operation, and has a low temperature rise. It is especially suitable for bearings that need to rotate at high speed. Metal cages are prone to sharp angles on the edges, while nylon cages almost do not have this problem. This is also conducive to the reasonable distribution of lubricating grease in the bearing cavity, so it can significantly improve the life of the bearing. When the grease in the bearing is evenly distributed, the nylon cage has a smaller starting torque than metal cages such as iron cages, and has better corrosion resistance. At the same time, nylon has a self-lubricating effect and can operate well even in an under-lubricated state. It can be molded in one step, and the processing accuracy is easier to ensure. The density of nylon is only one-seventh of that of iron, so it is lighter, has a smaller friction coefficient, and can better resist the impact of balls 3-4. It is more flexible and quieter than iron cages in guiding the operation of metal balls 3-4.

[0067] The pocket of the retainer 3 - 3 is a superior arc with a pocket opening, which can wrap the ball 3 - 4 , and the pocket opening faces the single-layer rubber contact seal structure 8 .

[0068] A labyrinth seal structure 4 is provided on one end face of the fully sealed energy-saving silent bearing 3 .

[0069] The labyrinth seal structure 4 includes an outer seal ring 4 - 1 , a middle seal ring 4 - 2 and an inner seal ring 4 - 3 .

[0070] The outer sealing ring 4-1 includes an outer sealing ring annular portion 4-1-1 of an integral structure and outer sealing ring inner ring flanges 4-1-2 and (annular) outer sealing ring outer ring flanges 4-1-3 (annular) on both sides. The outer sealing ring 4-1 is made of metal.

[0071] The inner ring flange 4-1-2 of the outer sealing ring and the outer ring flange 4-1-3 of the outer sealing ring extend toward the retaining frame 3-3 and are perpendicular to the annular portion 4-1-1 of the outer sealing ring.

[0072] The inner ring flange 4-1-2 of the outer sealing ring is longer than the outer ring flange 4-1-3 of the outer sealing ring.

[0073] The outer sealing ring 4-1 (the inner ring flange 4-1-2 of the outer sealing ring) is fixedly sleeved on the bearing inner ring 3-1 and rotates synchronously.

[0074] The annular portion 4-1-1 of the outer sealing ring is flush with one end surface of the bearing inner ring 3-1 and the bearing outer ring 3-2.

[0075] The surface of the outer sealing ring annular portion 4-1-1 is provided with a zinc plating layer 7.

[0076] The inner sealing ring 4-3 includes an inner sealing ring annular portion 4-3-1 of an integral structure and inner sealing ring inner ring flanges 4-3-2 (annular) and inner sealing ring outer ring flanges 4-3-3 (annular) on both sides. The inner sealing ring 4-3 is made of metal.

[0077] The inner ring flange 4-3-2 and the outer ring flange 4-3-3 of the inner sealing ring both extend in opposite directions to the retainer 3-3. The outer ring flange 4-3-3 of the inner sealing ring is perpendicular to the annular portion 4-3-1 of the inner sealing ring. The inner ring flange 4-3-2 of the inner sealing ring extends away from the annular portion 4-3-1 of the inner sealing ring, forming an angle S.

[0078] The annular portion 4-3-1 of the inner sealing ring is located inside the outer ring flange 4-1-3 of the outer sealing ring.

[0079] The outer ring flange 4-1-3 of the outer sealing ring is located between the inner ring flange 4-3-2 of the inner sealing ring and the outer ring flange 4-3-3 of the inner sealing ring.

[0080] The outer ring flange 4-3-3 of the inner sealing ring is located in the first groove 10 of the bearing outer ring and is locked in contact and rotates synchronously.

[0081] The inner ring flange 4-3-2 of the inner sealing ring is located inside the concave side of the outer sealing ring 4-1 and extends toward the inner ring flange 4-1-2 of the outer sealing ring.

[0082] The middle seal ring 4-2 includes an integral ring portion 4-2-1 and outer ring sealing lips 4-2-2 (annular) and inner ring extensions 4-2-3 (annular) on both sides. The middle seal ring 4-2 is made of an elastic material (such as nitrile rubber).

[0083] The middle sealing ring 4-2 is located on the side of the inner sealing ring 4-3 facing away from the retaining frame 3-3 and is fixedly connected thereto.

[0084] One branch of the middle seal ring's outer ring sealing lip 4-2-2 extends along the inner seal ring's outer ring flange 4-3-3 and wraps around it, forming a wrapping sealing lip 11 (annular) on the end face of the inner seal ring's outer ring flange 4-3-3. The other branch of the middle seal ring's outer ring sealing lip 4-2-2 extends toward the outer seal ring's outer ring flange 4-1-3 at the middle of the inner seal ring's outer ring flange 4-3-3 and bends to form an axial contact sealing lip 5 (annular) that contacts the outer seal ring's outer ring flange 4-1-3. The two branches extend to form a V-shaped inlet reverse seal structure 12, which serves as the first sealing space 13 and forms an angle R.

[0085] The inlet reverse sealing structure 12 opens toward the inlet of the labyrinth seal structure 4 and reversely blocks the inlet of the labyrinth seal 4 to prevent air, water and impurities from entering the bearing.

[0086] The inner ring extension portion 4-2-3 of the middle sealing ring extends along the inner ring flange 4-3-2 of the inner sealing ring and wraps around both sides of the inner ring flange 4-3-2 of the inner sealing ring.

[0087] The inner ring extension portion 4-2-3 of the middle sealing ring forms an outlet reverse sealing structure 6 of the V-shaped labyrinth sealing structure 4 at the edge of the inner ring flange 4-3-2 of the inner sealing ring.

[0088] One branch of the outlet reverse seal structure 6 extends toward the outer seal ring annular portion 4-1-1 and the outer seal ring inner flange 4-1-2, forming a second sealed space 14 between the outer seal ring annular portion 4-1-1 and the outer seal ring inner flange 4-1-2, forming an angle S.

[0089] The other branch of the outlet reverse seal structure 6 extends toward the inner flange 4-1-2 of the outer seal ring and the retainer 3-3. A sealing groove 28 (annular) is provided on the side facing the retainer 3-3, forming a third sealed space 15 between the inner flange 4-1-2 of the outer seal ring and the retainer 3-3, forming an angle T.

[0090] One branch of the outlet reverse sealing structure 6 reversely blocks the inlet of the labyrinth seal 4 , and the other branch of the outlet reverse sealing structure 6 reversely blocks the connection between the labyrinth seal 4 and the retaining frame 3 - 3 .

[0091] That is, the staggered outer sealing ring 4-1 and the inner sealing ring 4-3 form a Z-shaped labyrinth sealing channel, the inlet is reversely blocked by the inlet reverse sealing structure 12, and the outlet is reversely blocked on both sides by the outlet reverse sealing structure 6 at the same time, so as to prevent air, water and impurities from entering from the outside and prevent oil leakage from the inside.

[0092] The other end face of the fully sealed energy-saving silent bearing 3 is provided with a single-layer rubber contact seal structure 8 (conventional rubber and SPCC skeleton seal structure, which is a known technology).

[0093] The single-layer rubber contact sealing structure 8 includes a skeleton 8-1 and a single-layer contact sealing ring 8-2.

[0094] The single-layer contact sealing ring 8-2 wraps around the frame 8-1 from the outside.

[0095] The outer ring of the single-layer contact seal ring 8 - 2 is arranged in the second groove 16 of the bearing outer ring.

[0096] The inner ring sealing lip of the single-layer contact seal ring 8 - 2 is arranged in the bearing inner ring groove 17 .

[0097] The inner ring sealing lip of the existing single-layer contact seal ring 8-2 directly contacts the surface of the bearing inner ring 3-1. Although sealing can be achieved and the single-layer rubber contact seal structure 8 and the bearing inner ring 3-1 rotate separately, a certain amount of friction will still be generated. This structure provides a bearing inner ring groove 17 on the outer surface of the bearing inner ring 3-1, so that the relative rotation of the single-layer rubber contact seal structure 8 and the bearing inner ring 3-1 is smoother.

[0098] The fully sealed energy-saving silent bearing 3 is arranged in the bearing seat 1, the labyrinth sealing structure 4 opens toward the bearing seat 1, and a sealing cover 9 is buckled on the outside. The holes in the bearing inner ring 3-1 and the sealing cover 9 are interference fit with the support shaft 29 supporting the bearing inner ring 3.

[0099] A sealing cover reinforcement rib 18 (annular) is provided on the inner side of the sealing cover 9 .

[0100] A sealing cover bearing inner ring annular rib 19 is integrally provided on the inner side of the center hole of the sealing cover 9. The sealing cover bearing inner ring annular rib 19 has the same annular width as the bearing inner ring 3-1 and plays a role in supporting the bearing inner ring 3-1.

[0101] The bearing seat 1 is provided with an outward-expanding and variable-diameter shoulder 20 , the full-effect sealed energy-saving and silent bearing 3 is arranged on the inner side of the bearing seat 1 , and the sealing cover 9 is arranged at the shoulder 20 with a gap 21 (annular) between the shoulder 20 and the sealing cover 9 .

[0102] The shoulder 20 has an angle P. When water enters during operation, the angle P will cause the water to be thrown out of the gap 21 .

[0103] Lubricating grease is injected between the retaining frame 3 - 3 and the ball 3 - 4 of the bearing, there is lubricating grease on the inner side of the labyrinth seal structure 4 , and there is lubricating grease on the inner side of the single-layer rubber contact seal structure 8 .

[0104] When the bearing rotates, due to the friction between the ball 3-4 and the raceway 3-5, and the stirring effect of the ball 3-4 and the cage 3-3 on the lubricating grease, the bearing temperature rises, the lubricating grease softens and a pressure difference is generated.

[0105] The two contact surfaces between the bearing outer ring 3-2 and the bearing seat 1 are precision machined, and the contact surface between the bearing outer ring 3-2 and the bearing seat 1 (the sealing surface on the bearing outer ring 3-2) is carbonized (carbonization blackening is a known technology).

[0106] After testing, it was found that this bearing has a longer service life and better sealing performance than a bearing sealed on both sides by a single-layer rubber contact seal structure 8.

[0107] Due to the need to place the labyrinth seal structure 4, the fully sealed energy-saving silent bearing 3 needs to have a wider space on one side. The bearing is asymmetric, and the bearing inner ring 3-1 and the bearing outer ring 3-2 are axially wider and have a stronger load-bearing capacity.

[0108] When the roller 2 is running, the outer ring 3-2 of the bearing, the middle sealing ring 4-2, the inner sealing ring 4-3, the single-layer rubber contact sealing structure 8, the skeleton 3-3 and the ball 3-4 rotate synchronously with the roller 2, while the outer sealing ring 4-1, the inner ring 3-1 of the bearing, the protective cover 9 and the support shaft 29 are relatively stationary.

[0109] Angle R is 45°, S is 55°, T is 55°, and angle P is 3°.

[0110] Example 2

[0111] Example 2 is basically the same as Example 1, except that: angle R is 60°, S is 60°, T is 60°, and angle P is 5°.

[0112] Example 3

[0113] Example 3 is basically the same as Example 1, except that: angle R is 50°, S is 57°, T is 57°, and angle P is 4°.

Claims

1. A fully sealed energy-saving silent bearing, comprising a bearing inner ring (3-1), a bearing outer ring (3-2), a retainer (3-3) and a plurality of balls (3-4); a retainer (3-3) is provided between the bearing inner ring (3-1) and the bearing outer ring (3-2), and balls (3-4) are arranged in pockets of the retainer (3-3); a single-layer rubber contact seal structure (8) is provided on one end surface of the bearing inner ring (3-1) and the bearing outer ring (3-2); the characteristics are: The other end faces of the bearing inner ring (3-1) and the bearing outer ring (3-2) are provided with a labyrinth sealing structure (4); The inlet of the labyrinth sealing structure (4) is provided with an inlet reverse sealing structure (12); The outlet of the labyrinth sealing structure (4) is provided with an outlet reverse sealing structure (6); The inner sealing ring (4-3) comprises an inner sealing ring annular portion (4-3-1) of an integral structure, an inner sealing ring inner ring flange (4-3-2) and an inner sealing ring outer ring flange (4-3-3) bent on both sides; The elastic middle sealing ring (4-2) comprises a middle sealing ring annular portion (4-2-1) of an integral structure, a middle sealing ring outer ring sealing lip (4-2-2) bent on both sides, and a middle sealing ring inner ring extension portion (4-2-3); The middle sealing ring (4-2) is located between the outer sealing ring (4-1) and the inner sealing ring (4-3), and is fixedly connected to the inner sealing ring (4-3); The outer sealing lip (4-2-2) of the middle sealing ring extends toward the inlet of the labyrinth sealing structure (4) to form an inlet reverse sealing structure (12); The inner ring extension portion (4-2-3) of the middle sealing ring extends toward the outlet of the labyrinth sealing structure (4) to form an outlet reverse sealing structure (6); One branch of the middle sealing ring outer ring sealing lip (4-2-2) extends along the inner sealing ring outer ring flange (4-3-3) and wraps around the inner sealing ring outer ring flange (4-3-3) and forms a wrapping sealing lip (11) on the end face of the inner sealing ring outer ring flange (4-3-3); the other branch of the middle sealing ring outer ring sealing lip (4-2-2) extends toward the outer sealing ring outer ring flange (4-1-3) at the middle of the inner sealing ring outer ring flange (4-3-3) and bends to form an axial contact sealing lip (5) that contacts the outer sealing ring outer ring flange (4-1-3); the two branches extend to form a V-shaped inlet reverse sealing structure (12) which is a first sealing space (13) and forms an angle R. The bearing seat (1) is provided with an outward-expanding and variable-diameter shoulder (20), the full-effect sealed energy-saving and silent bearing (3) is provided on the inner side of the bearing seat (1), the sealing cover (9) is provided at the shoulder (20), and a gap (21) is formed between the shoulder (20) and the shoulder (20), and the shoulder (20) has an angle P.

2. The fully sealed energy-saving silent bearing according to claim 1, characterized in that: The inner ring sealing lip of the single-layer contact seal ring (8-2) is arranged in the bearing inner ring groove (17).

3. The fully sealed energy-saving and silent bearing according to claim 1, characterized in that: The cage (3-3) is made of engineering plastic.

4. The fully sealed energy-saving silent bearing according to claim 1, characterized in that: The labyrinth sealing structure (4) comprises a labyrinth sealing channel formed by an outer sealing ring (4-1) and an inner sealing ring (4-3) that are buckled together; The inlet reverse sealing structure (12) is V-shaped, with its opening facing the inlet of the labyrinth sealing structure (4); The outlet reverse sealing structure (6) is V-shaped, with one branch extending in the reverse direction to block the inlet of the labyrinth sealing structure (4), and the other branch extending in the reverse direction to block the connection between the labyrinth sealing structure (4) and the retaining frame (3-3).

5. The fully sealed energy-saving and silent bearing according to claim 4 is characterized in that: The outer sealing ring (4-1) comprises an outer sealing ring annular portion (4-1-1) of an integral structure, an outer sealing ring inner ring flange (4-1-2) and an outer sealing ring outer ring flange (4-1-3) bent on both sides; The outer sealing ring (4-1) is fixedly connected to the bearing inner ring (3-1); The inner sealing ring (4-3) is fixed to the bearing outer ring (3-2).

6. The fully sealed energy-saving and silent bearing according to claim 5, characterized in that: The V-shaped angle of the inlet reverse sealing structure (12) has an angle R of 45-60°; An angle S formed between one branch and the other branch of the outlet reverse seal structure (6) and the radial sides of the bearing inner ring (3-1) is 55-60 degrees, and an angle T is 55-60 degrees.

7. The fully sealed energy-saving and silent bearing according to claim 6, characterized in that: The angle R is 45°, S is 55°, and T is 55°; or the angle R is 60°, S is 60°, and T is 60°; or the angle R is 50°, S is 57°, and T is 57°.

8. The fully sealed energy-saving and silent bearing according to claim 5, characterized in that: The end surface of the annular portion (4-1-1) of the outer sealing ring has a zinc coating (7).

9. The fully sealed energy-saving silent bearing according to claim 1, characterized in that: The sealing surface of the bearing outer ring (3-2) is carbonized.

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