A blower bearing end cover seal structure

Abstract

The utility model relates to a blower fan technical field especially a kind of blower fan bearing end cover sealing structure;The utility model includes blower fan body, rotating shaft, annular fixed seat, bearing body, bearing end cover, first annular groove, sealing ring, second annular groove and U-shaped groove;Rotating shaft is rotatably connected in blower fan body, annular fixed seat is sleeved on rotating shaft, and the central axis portion of annular fixed seat is thicker than its edge portion, bearing body is sleeved on rotating shaft, and bearing body is embedded in the central axis portion of annular fixed seat, and the appearance of bearing end cover is nested with annular fixed seat and is matched with setting;First annular groove is opened in the central axis portion of annular fixed seat, and sealing ring is placed in first annular groove;When bearing end cover is close to the process of adhering annular fixed seat, annular extrusion plate extrudes and pushes sealing ring to move towards second annular groove, so that sealing ring can be further extruded in installation process, fill the possible tiny gap, improve the sealing effect.

Description

Technical Field

[0001] This utility model relates to the field of blower technology, specifically to a blower bearing end cover sealing structure. Background Technology

[0002] The working process of a blower relies on the eccentric rotation of an offset rotor within a cylinder. This eccentric rotation causes changes in the volume between the blades in the rotor slots, drawing in, compressing, and expelling air. During operation, an oil tank supplying lubricating oil to components such as the rotor shaft is typically located within the blower base. The pressure difference within the blower automatically delivers lubricant to the drip nozzle, dripping into the cylinder to reduce friction and noise, while also preventing backflow of gas within the cylinder. In existing blowers, the rotor is mounted within the machine body via bearings. The bearing end caps on the bearings are an essential and crucial component of the blower.

[0003] In light of this, patent number CN219795641U discloses a blower bearing end cover sealing structure, including a blower body and a rotating shaft. The rotating shaft is rotatably connected to the blower body, and one end of the rotating shaft penetrates the side wall of the blower body. An annular fixing seat, a bearing body, and a bearing end cover are sequentially fitted onto the rotating shaft extending outside the blower body. An airtight assembly is provided between the fixing seat and the bearing end cover. The airtight assembly includes an installation groove and a sealing airbag. The installation groove is located on the surface of the bearing end cover near the fixing seat and is an annular groove. The sealing airbag is an annular airbag located within the installation groove and is connected to an inflation tube. One end of the inflation tube communicates with the sealing airbag, and the other end extends outside the installation groove and is connected to an inflation device. The sealing airbag inflates and abuts against the inner wall of the installation groove and the surface of the fixing seat near the bearing end cover. This utility model has the advantages of eliminating the need for frequent seal replacement and providing a superior user experience.

[0004] The aforementioned application provides a blower bearing end cover sealing structure, which has the beneficial effect of eliminating the need for frequent seal replacement. Although the aforementioned application can achieve the effect of eliminating the need for frequent seal replacement, it inevitably still has shortcomings in actual operation. Although the sealing airbag can fit tightly against the annular fixed seat and the bearing end cover in the initial state, the blower will generate continuous vibration and temperature changes during operation. Under the influence of these complex working conditions, the sealing airbag will experience elastic fatigue, which will cause the fit between it and the annular fixed seat and the bearing end cover to gradually decrease, resulting in unstable sealing performance and difficulty in maintaining a good sealing effect. At the same time, although it is claimed that the seal does not need to be replaced frequently, once the airbag is damaged or aged and other irreparable problems occur, the operating space is limited, resulting in high maintenance difficulty and cost. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a blower bearing end cover sealing structure, which solves the problem of unstable sealing performance of the blower bearing end cover sealing structure.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A blower bearing end cover sealing structure includes: Blower body; A rotating shaft is rotatably connected to the blower body, and one end of the rotating shaft passes through the side wall of the blower body and extends to the outside of the blower body. An annular fixing seat, wherein the annular fixing seat is sleeved on the rotating shaft, and the central shaft portion of the annular fixing seat is thicker than its own edge portion; The bearing body is sleeved on the rotating shaft and embedded in the central shaft portion of the annular fixed seat. The bearing end cap is provided with a shape that is nested and fitted with the annular fixing seat; A first annular groove is formed around the bearing body; the first annular groove is formed on the central shaft portion of the annular fixed seat. A sealing ring is placed inside the first annular groove.

[0007] include: The second annular groove is provided on the nesting surface of the bearing end cover, which is engaged with the sealing ring. The U-shaped groove is a transversely arranged U-shape. The central shaft portion of the annular fixing seat has a U-shaped groove embedded in its surface. At least two U-shaped grooves are formed on the upper and lower parts of the bearing body. The first slide cylinder is disposed in the upper inner cavity of the U-shaped groove; The first slide rod passes through the first slide cylinder; The first inclined block is fixedly connected to the through end of the first sliding rod; The second slide cylinder is provided inside the cavity of the longitudinal turning surface of the U-shaped groove, and the two ends of the second slide cylinder are internally supported by the U-shaped groove. The second slide rod is slidably connected to the second slide cylinder, and the second slide rod is located inside the cavity of the longitudinal turning surface of the U-shaped groove; The second inclined block is fixedly connected to the top of the second sliding rod, and the second inclined block is used to cooperate with the inclined surface of the first inclined block. The third inclined block is fixedly connected to the bottom end of the second sliding rod; The third sliding cylinder is fixedly supported within the lower inner cavity of the U-shaped groove. The third slide rod is slidably connected to the third slide cylinder, the third slide rod passes through the third slide cylinder, and the other end of the third slide rod extends into the first annular groove; The fourth inclined block is fixedly connected to one end of the third sliding rod, and is used in conjunction with the inclined surface of the third inclined block; An annular extrusion plate is provided at the other end of the third slide bar; An arc-shaped contact plate is fixedly connected to the uninserted end of the first sliding rod.

[0008] The annular extrusion plate is fixedly connected to the sealing ring.

[0009] The sealing ring and the second annular groove are interlocked and fitted together.

[0010] The two U-shaped grooves are symmetrically distributed about the central axis of the rotation shaft.

[0011] The central section of the flange of the bearing end cap protrudes more than the edge.

[0012] The other end of the third slide bar is connected to the first annular groove.

[0013] Compared with existing technologies, the advantages of this invention are as follows: The design of this invention utilizes the pressure of the bearing end cap on the arc-shaped contact plate, enabling the linkage mechanism to continuously transmit pressure. Its flange automatically triggers the linkage mechanism, ensuring the annular compression plate consistently presses against the sealing ring. The sealing ring is further compressed between the first and second annular grooves, resulting in a tighter contact with the annular fixing seat and the bearing end cap, thus filling any possible tiny gaps. No additional tightening steps or concerns about insufficient preload are required. The installation process itself completes the sealing ring compression, automatically compensating for wear and gap changes. This significantly improves the durability and reliability of the seal. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a side view of the bearing end cap and the second annular groove structure of this utility model; Figure 3 This is a side view of the structure of the annular fixed base, the first movable groove, the annular extrusion plate, the first annular groove, and the annular extrusion plate of this utility model. Figure 4 This utility model Figure 1 A magnified view of a section at point A in the middle; In the diagram, 1. Blower body; 2. Rotating shaft; 3. Annular fixed seat; 4. Bearing body; 5. Bearing end cover; 6. First annular groove; 7. Sealing ring; 8. Second annular groove; 9. U-shaped groove; 10. First slide cylinder; 11. First slide rod; 12. First inclined block; 14. Second slide cylinder; 15. Second slide rod; 16. Second inclined block; 17. Third inclined block; 19. Third slide cylinder; 20. Third slide rod; 21. Fourth inclined block; 22. Annular extrusion plate; 23. Arc-shaped contact plate. Detailed Implementation

[0015] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0016] Please see Figure 1-4 The present invention provides a technical solution: the blower bearing end cover sealing structure includes a blower body 1, a rotating shaft 2, an annular fixed seat 3, a bearing body 4, a bearing end cover 5, a first annular groove 6, a sealing ring 7, a second annular groove 8, and a U-shaped groove 9.

[0017] Rotary shaft 2 is rotatably connected to blower body 1. One end of rotary shaft 2 passes through the side wall of blower body 1 and extends to the outside of blower body 1. Annular fixing seat 3 is sleeved on rotary shaft 2, and the central shaft portion of annular fixing seat 3 is thicker than its edge portion. Bearing body 4 is sleeved on rotary shaft 2, and the bearing body 4 is embedded in the central shaft portion of annular fixing seat 3. The shape of bearing end cover 5 is nested and fitted with annular fixing seat 3. The center section of the flange of bearing end cover 5 protrudes more than the edge, providing precise positioning and fitting reference. The thickened central shaft portion and the protruding center section of the flange are to accommodate the bearing body 4, the first annular groove 6, the second annular groove 8, and the crucial U-shaped groove 9 linkage mechanism, and to provide them with sufficient structural strength and installation space. The nested fit ensures concentricity between the two, which is the basis for sealing.

[0018] In this invention, a first annular groove 6 is formed around the bearing body 4; the first annular groove 6 is formed in the central shaft portion of the annular fixing seat 3, and a sealing ring 7 is placed inside the first annular groove 6. The sealing ring 7 and the second annular groove 8 are interlocked. The nesting surface of the bearing end cover 5 has a second annular groove 8 that engages with the sealing ring 7; during installation, a complete annular cavity is formed, guiding and restricting the displacement direction of the sealing ring 7, ensuring that it is evenly and effectively pressed onto the metal surfaces on both sides, filling the microscopic gaps. The interlocking fit prevents the sealing ring from accidentally falling off when not under pressure.

[0019] In this invention, the U-shaped groove 9 is arranged laterally in a U-shape. The central shaft portion of the annular fixing seat 3 has an embedded U-shaped groove 9. At least two U-shaped grooves 9 are formed on the upper and lower parts of the bearing body 4. The two U-shaped grooves 9 are symmetrically distributed about the central axis of the rotating shaft 2, accommodating and guiding the entire force transmission and conversion linkage mechanism. Its U-shaped path design cleverly converts the axial installation force applied by the bearing end cover 5 into a radial clamping force acting on the sealing ring 7 through the mechanism. The symmetrical distribution (at least two) ensures that the sealing ring 7 receives uniform clamping force along its circumference, avoiding single-point pressure that could lead to sealing ring distortion or excessive local wear, thus ensuring the uniformity and reliability of the seal.

[0020] In this invention, a first sliding cylinder 10 is disposed within the upper inner cavity of a U-shaped groove 9, and a first sliding rod 11 passes through the first sliding cylinder 10; it transmits axial force and provides guidance. The first sliding cylinder 10 is fixed to the upper cavity of the U-shaped groove 9, ensuring that the first sliding rod 11 can only move axially along the upper section of the U-shaped groove. A first inclined block 12 is fixedly connected to the through end of the first sliding rod 11. A second sliding cylinder 14 is disposed within the inner cavity of the longitudinal turning surface of the U-shaped groove 9, with both ends of the second sliding cylinder 14 internally supported by the U-shaped groove 9. A second sliding rod 15 is slidably connected to the second sliding cylinder 14, and the second sliding rod 15 is located within the inner cavity of the longitudinal turning surface of the U-shaped groove 9, transmitting longitudinal force and providing guidance. The second sliding cylinder 14 is fixed within the longitudinal turning cavity of the U-shaped groove 9, ensuring that the second sliding rod 15 can only move longitudinally along the middle section of the U-shaped groove.

[0021] In this invention, the top end of the second slide rod 15 is fixedly connected to a second inclined block 16 that cooperates with the inclined surface of the first inclined block 12; the first inclined block 12 moves axially with the first slide rod 11, and its inclined surface presses against the inclined surface of the second inclined block 16, forcing the second inclined block 16 and the second slide rod 15 to move downward longitudinally. The inclined surface design is key to force transmission and direction conversion. The bottom end of the second slide rod 15 is fixedly connected to a third inclined block 17. The third slide cylinder 19 is fixedly supported in the lower inner cavity of the U-shaped groove 9. The third slide cylinder 19 is slidably connected to the third slide rod 20. The third slide rod 20 passes through the third slide cylinder 19, and the other end of the third slide rod 20 extends into the first annular groove 6, communicating with the first annular groove 6.

[0022] In this invention, one end of the third slide rod 20 is fixedly connected to a fourth inclined block 21 that cooperates with the inclined surface of the third inclined block 17, completing the second force direction conversion (longitudinal -> radial). The third inclined block 17 moves longitudinally with the second slide rod 15, and its inclined surface presses against the inclined surface of the fourth inclined block 21, forcing the fourth inclined block 21 and the third slide rod 20 to move radially inward toward the outside of the U-shaped groove, pointing toward the center of the rotation axis. This is the final direction acting on the sealing ring. The other end of the third slide rod 20 is provided with an annular pressing plate 22; the annular pressing plate 22 is fixedly connected to the sealing ring 7, and the arc-shaped contact plate 23 is fixedly connected to the unpenetrated end of the first slide rod 11 to receive the initial force during installation. Its arc-shaped design ensures a good contact surface with the protruding central section flange of the bearing end cover 5, which can smoothly transmit the axial pressure to the first slide rod 11.

[0023] If the sealing ring 7 needs to be replaced due to aging or wear after long-term use, simply separate the annular fixing seat 3 from the bearing end cover 5. As the annular fixing seat 3 and the bearing end cover 5 separate, the pressure on the arc-shaped contact plate 23 disappears, and the squeezing force of the annular extrusion plate 22 on the sealing ring 7 is released, making it easy to remove from the first annular groove 6 for replacement. The arc-shaped contact plate 23 can be reset by pushing the annular extrusion plate 22. After the sealing ring 7 is replaced, it can be reassembled according to the installation procedure to restore the sealing performance of the bearing end cover 5 and the annular fixing seat 3.

[0024] It should be noted that, during the installation of the blower bearing end cover sealing structure designed in this utility model, the bearing end cover 5 needs to be pushed close to the fitting annular fixing seat 3 first. The center section of the flange of the bearing end cover 5, being more protruding than the edge, will first contact and press against the arc-shaped contact plate 23. The arc-shaped contact plate 23 moves into the U-shaped groove 9 and, through the first sliding rod 11, drives the first inclined block 12 to move. The first sliding cylinder 10 of the rod body will then slide within the U-shaped groove 9. The first inclined block 12, by pressing down on the second inclined block 16 that is in contact with its inclined surface, drives the second sliding rod 15 to move. The second sliding rod 15 then drives the second sliding cylinder 14 of the rod body to... The third inclined block 17 at the other end moves, and by pressing the fourth inclined block 21 that is in contact with its own inclined surface, the third inclined block 17 drives the third sliding rod 20 to move. After being pressed, the third sliding rod 20 pushes the annular extrusion plate 22 at the port outward into the U-shaped groove 9. Finally, the annular extrusion plate 22 drives the sealing ring 7 located in the first annular groove 6 to move closer to the second annular groove 8. As the first annular groove 6 gradually engages with the second annular groove 8, the sealing ring 7 will be further compressed between the first annular groove 6 and the second annular groove 8, making its contact with the annular fixed seat 3 and the bearing end cover 5 tighter, thereby filling any possible small gaps and greatly improving the sealing effect. During the operation of the blower body 1, if some small displacement occurs between the bearing seat components due to factors such as vibration and temperature changes, the sealing ring 7 can still maintain a good compression and fit state due to the continuous compression and transmission of the arc-shaped contact plate 23.

[0025] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations may be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A sealing structure for a blower bearing end cover, characterized in that, include: Blower body (1); Rotating shaft (2), the rotating shaft (2) is rotatably connected to the blower body (1), one end of the rotating shaft (2) passes through the side wall of the blower body (1) and extends to the outside of the blower body (1); An annular fixing seat (3) is sleeved on the rotating shaft (2), and the central part of the annular fixing seat (3) is thicker than its own edge part; The bearing body (4) is sleeved on the rotating shaft (2) and is embedded in the central shaft portion of the annular fixed seat (3); The bearing end cap (5) is nested and fitted with the annular fixing seat (3); A first annular groove (6) is formed around the bearing body (4); the first annular groove (6) is formed on the central shaft portion of the annular fixing seat (3). A sealing ring (7) is placed in the first annular groove (6).

2. The blower bearing end cover sealing structure according to claim 1, characterized in that, include: The second annular groove (8) is provided on the nesting surface of the bearing end cover (5) to engage with the sealing ring (7); U-shaped groove (9), the U-shaped groove (9) is a transversely arranged U-shape, the central shaft part of the annular fixing seat (3) is provided with U-shaped groove (9), and at least two U-shaped grooves (9) are provided on the upper and lower parts of the bearing body (4); The first slide cylinder (10) is disposed in the upper inner cavity of the U-shaped groove (9); The first slide rod (11) passes through the first slide cylinder (10); The first inclined block (12) is fixedly connected to the through end of the first slide rod (11); The second slide cylinder (14) is provided in the inner cavity of the longitudinal turning surface of the U-shaped groove (9), and the two ends of the second slide cylinder (14) are supported by the U-shaped groove (9). The second slide rod (15) is slidably connected to the second slide cylinder (14), and the second slide rod (15) is located in the inner cavity of the longitudinal turning surface of the U-shaped groove (9); The second inclined block (16) is fixedly connected to the top of the second sliding rod (15) and is used in conjunction with the inclined surface of the first inclined block (12); The third inclined block (17) is fixedly connected to the bottom end of the second sliding rod (15); The third sliding cylinder (19) is fixed to the lower inner cavity of the U-shaped groove (9). The third slide rod (20) is slidably connected to the third slide cylinder (19), the third slide rod (20) passes through the third slide cylinder (19), and the other end of the third slide rod (20) extends into the first annular groove (6); The fourth inclined block (21) is fixedly connected to one end of the third sliding rod (20), which is used in conjunction with the inclined surface of the third inclined block (17); An annular extrusion plate (22) is provided at the other end of the third slide bar (20); An arc-shaped contact plate (23) is fixedly connected to the uninserted end of the first slide bar (11).

3. The blower bearing end cover sealing structure according to claim 2, characterized in that, The annular extrusion plate (22) is fixedly connected to the sealing ring (7).

4. The blower bearing end cover sealing structure according to claim 3, characterized in that, The sealing ring (7) and the second annular groove (8) are interlocked.

5. The blower bearing end cover sealing structure according to claim 3, characterized in that, The two U-shaped grooves (9) are symmetrically distributed about the central axis of the rotation shaft (2).

6. The blower bearing end cover sealing structure according to claim 3, characterized in that, The central section of the flange of the bearing end cap (5) protrudes more than the edge.

7. The blower bearing end cover sealing structure according to claim 3, characterized in that, The other end of the third slide bar (20) is connected to the first annular groove (6).

Images