A centrifuge bearing housing connection structure

Abstract

This utility model provides a centrifuge bearing housing connection structure, specifically relating to the field of centrifuge technology, to solve the technical problem that bolts are prone to fatigue fracture under long-term alternating loads, which may lead to serious safety accidents such as drum imbalance and equipment disintegration. The device includes a bearing housing body, with stepped sealing pressure flanges for sealing and positioning at both the connecting end of the bearing housing body and the connecting end of the equipment housing. A reinforcing structure is provided on the outer side of each stepped sealing pressure flange. An elastic buffer layer for vibration damping is provided between the stepped sealing pressure flanges. Anti-loosening guide bushings are embedded in the bolt holes of the stepped sealing pressure flanges. The stepped sealing pressure flanges, elastic buffer layer, and anti-loosening guide bushings are connected by bolts. This device can effectively disperse stress, improve sealing reliability, dampen vibration, and has an anti-loosening function.

Description

Technical Field

[0001] This utility model relates to the field of centrifuge technology, and more specifically, to a centrifuge bearing seat connection structure. Background Technology

[0002] Centrifuges, as key equipment that utilizes centrifugal force to achieve solid-liquid separation and material classification, are widely used in industrial fields such as chemical, pharmaceutical, food, and environmental protection. Their core working components operate under high-speed rotation conditions, generating enormous centrifugal force and vibration loads that are transmitted to the equipment casing through the bearing housing. Therefore, the connection structure between the bearing housing and the casing is a crucial element in ensuring the safe and stable operation of the equipment.

[0003] Existing centrifuge bearing housing connection structures typically employ a flat flange combined with ordinary bolts. This method suffers from the following technical drawbacks: the traditional flat flange structure is simple and cannot effectively distribute the radial and axial loads generated by high-speed rotation; and the bolts, as the primary load-bearing components, are prone to stress concentration at the thread root and head fillet. Under long-term alternating loads, the bolts are susceptible to fatigue fracture, which can lead to serious safety accidents such as drum imbalance and equipment disintegration. Utility Model Content

[0004] The purpose of this utility model is to provide a centrifuge bearing housing connection structure that can effectively disperse stress, improve sealing reliability, buffer vibration, and has anti-loosening function.

[0005] The embodiments of this utility model are achieved through the following technical solutions:

[0006] A centrifuge bearing housing connection structure includes a bearing housing body. Both the connecting end of the bearing housing body and the connecting end of the equipment housing are provided with stepped sealing pressure flanges for sealing and positioning. A reinforcing structure is provided on the outer side of each stepped sealing pressure flange. An elastic buffer layer for vibration damping is provided between the stepped sealing pressure flanges. Anti-loosening guide bushings are embedded in the bolt holes of each stepped sealing pressure flange. The stepped sealing pressure flanges, the elastic buffer layer, and the anti-loosening guide bushings are connected by bolts.

[0007] In some embodiments, the reinforcing structure includes multiple layers of annular reinforcing ribs concentrically sleeved on the outer side of the stepped sealing pressure flange, one end of the annular reinforcing ribs being connected to the outer side of the stepped sealing pressure flange, and the other end being connected to the outer side of the bearing housing body or the equipment housing; the annular reinforcing ribs are provided in at least two rings.

[0008] In some embodiments, the annular reinforcing rib and the stepped sealing pressure flange are integrally formed with a smooth transition.

[0009] In some embodiments, the sealing surface of the stepped sealing pressure flange is stepped, including a main sealing surface and an auxiliary mounting surface. The auxiliary mounting surface is set higher than the main sealing surface and located outside the main sealing surface. The main sealing surface has a mounting groove for installing a seal, and the mounting groove is arranged around the main sealing surface.

[0010] In some embodiments, the elastic buffer layer is disposed between the auxiliary mounting surfaces of the two stepped sealing pressure flanges; the elastic buffer layer has clearance holes corresponding to the bolt holes, and the diameter of the clearance holes is larger than the diameter of the bolts.

[0011] In some embodiments, the inner hole of the anti-loosening guide bushing matches the bolt, the outer circle of the anti-loosening guide bushing is interference-fitted with the bolt hole of the stepped sealing pressure flange, and guide angle structures are provided at both ends of the anti-loosening guide bushing.

[0012] In some embodiments, the bolts are arranged in an alternating inner and outer ring pattern on the stepped sealing pressure flange, wherein the outer ring bolts and the inner ring bolts are distributed around the central axis of the stepped sealing pressure flange, the outer ring bolts and the inner ring bolts are arranged alternately, and the bolts are all located in an area at a certain distance from the edge of the stepped sealing pressure flange.

[0013] In some embodiments, a portion of the outer ring of the bolt is provided with a detection hole for mounting a stress sensor, the detection hole extending inward from the bolt head end along the axis of the bolt.

[0014] In some embodiments, the inner surface of the bearing housing body is provided with a surface treatment layer, and the outer surface of the bearing housing body and the outer surface of the stepped sealing pressure flange are both provided with a protective coating.

[0015] The technical solution of this utility model embodiment has at least the following advantages and beneficial effects:

[0016] 1. This connection structure disperses centrifugal force and axial load through multi-layered annular reinforcing ribs, and the staggered arrangement of the inner and outer rings of the bolts reduces stress concentration, improves the uniformity of bolt stress, and reduces load fluctuation, thereby reducing the risk of fracture from the root. The anti-loosening guide bushing ensures accurate bolt installation and avoids local stress overload caused by off-center loading.

[0017] 2. This connection structure uses the main sealing surface of the stepped sealing pressure flange to cooperate with the auxiliary positioning surface, which not only avoids media leakage, but also achieves precise flange alignment and eliminates the additional bending moment of bolts caused by installation misalignment.

[0018] 3. This connection structure absorbs high-frequency vibrations through an elastic buffer layer, significantly attenuating the alternating load transmitted to the bolts, reducing the bolt fatigue crack propagation rate, and extending their fatigue life.

[0019] 4. In this connection structure, the stress sensor detection holes of some bolts can monitor stress changes in real time and provide early warning of abnormalities; the anti-loosening guide bushing can also compensate for the preload decay and prevent the bolts from loosening.

[0020] 5. This connection structure improves corrosion resistance through the inner surface treatment layer of the bearing housing and the outer surface protective coating, avoids stress corrosion cracking, and extends the overall service life of the connection structure. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the internal structure of a centrifuge bearing seat connection structure provided in an embodiment of the present invention;

[0023] Figure 2 An inner view of the stepped sealing pressure flange provided in an embodiment of this utility model;

[0024] Figure 3 This is a top view of a centrifuge bearing housing connection structure provided in an embodiment of this utility model.

[0025] Icons: 1. Bearing housing body; 2. Stepped sealing pressure flange; 3. Elastic buffer layer; 4. Bolt hole; 5. Relaxation guide liner; 6. Annular reinforcing rib; 7. Main sealing surface; 8. Auxiliary mounting surface; 9. Mounting groove; 10. Clearance hole; 11. Inspection hole. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0028] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0029] In the description of this utility model, it should be noted that if terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" appear to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0030] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] Please see Figures 1-3 As shown, the main body of this embodiment is a centrifuge bearing housing connection structure, including a bearing housing body 1. The connecting end of the bearing housing body 1 and the connecting end of the equipment housing are respectively provided with stepped sealing pressure flanges 2 for sealing and positioning. The outer side of the stepped sealing pressure flanges 2 is provided with a reinforcing structure. An elastic buffer layer 3 for buffering vibration is provided between the stepped sealing pressure flanges 2. The bolt holes 4 of the stepped sealing pressure flanges 2 are fitted with anti-loosening guide bushings. The stepped sealing pressure flanges 2, the elastic buffer layer 3, and the anti-loosening guide bushings are connected by bolts.

[0032] Furthermore, the reinforcing structure includes multiple layers of annular reinforcing ribs 6 concentrically sleeved on the outer side of the stepped sealing pressure flange 2. One end of the annular reinforcing rib 6 is connected to the outer side of the stepped sealing pressure flange 2, and the other end is connected to the outer side of the bearing housing body 1 or the equipment housing. The annular reinforcing rib 6 is provided with at least two rings.

[0033] Furthermore, the annular reinforcing rib 6 and the stepped sealing pressure flange 2 are smoothly integrated and formed as a single unit.

[0034] Furthermore, the sealing surface of the stepped sealing pressure flange 2 is stepped, including a main sealing surface 7 and an auxiliary mounting surface 8. The auxiliary mounting surface 8 is set higher than the main sealing surface 7 and located outside the main sealing surface 7. The main sealing surface 7 has a mounting groove 9 for installing a sealing element, and the mounting groove 9 is arranged around the main sealing surface 7.

[0035] Furthermore, the elastic buffer layer 3 is disposed between the auxiliary mounting surfaces 8 of the two stepped sealing pressure bearing flanges 2; the elastic buffer layer has a clearance hole 10 corresponding to the bolt hole 4, and the diameter of the clearance hole 10 is larger than the diameter of the bolt.

[0036] Furthermore, the inner hole of the anti-loosening guide bushing matches the bolt, the outer circle of the anti-loosening guide bushing is interference-fitted with the bolt hole 4 of the stepped sealing pressure flange 2, and guide angle structures are provided at both ends of the anti-loosening guide bushing.

[0037] Furthermore, the bolts are arranged in an alternating inner and outer ring pattern on the stepped sealing pressure flange 2. The outer and inner ring bolts are distributed around the central axis of the stepped sealing pressure flange 2, and the outer and inner ring bolts are staggered. All bolts are located in an area at a certain distance from the edge of the stepped sealing pressure flange 2.

[0038] Furthermore, the outer portion of the bolt is provided with a detection hole 11 for mounting a stress sensor, the detection hole 11 extending inward from the bolt head end along the axis of the bolt.

[0039] Furthermore, the inner surface of the bearing housing body 1 is provided with a surface treatment layer, and the outer surface of the bearing housing body 1 and the outer surface of the stepped sealing pressure flange 2 are both provided with a protective coating.

[0040] This connection structure utilizes a reinforced structure composed of multiple layers of annular reinforcing ribs 6 to distribute bolt loads and reduce stress concentration. One end of the annular reinforcing rib 6 connects to the outer surface of the stepped sealing pressure flange 2, and the other end connects to the outer surface of the bearing housing body 1, seamlessly integrating with the flange. This forms a rigid load-bearing system consisting of the flange, reinforcing ribs, and bearing housing body 1, evenly distributing the radial centrifugal force and axial preload borne by the bolts to the bearing housing body 1 through the annular ribs, thus changing the traditional stress pattern where the bolt bears the load alone. Furthermore, the multi-layered design of the annular reinforcing ribs further expands the load distribution range, reducing the stress on individual bolts and preventing bolt fracture due to localized stress overload.

[0041] Furthermore, the stepped structure in this connection reduces installation deviation through the combined design of the main sealing surface 7 and the auxiliary mounting surface 8. The mounting groove 9 of the main sealing surface 7 installs the seal, separating the sealing load from the bolt preload, avoiding bolt stress fluctuations caused by uneven seal compression, and reducing alternating stress at the thread root.

[0042] Secondly, the elastic buffer layer 3 is disposed between the auxiliary positioning surfaces of the two stepped flanges, directly addressing the prevention of bolt fatigue fracture caused by vibration. The elastic buffer layer 3 absorbs the high-frequency vibrations during centrifuge operation through its own elastic deformation, reducing the vibration load transmitted to the bolts and improving bolt life. The clearance hole 10 ensures that the buffer layer does not interfere with the bolt's stress.

[0043] It is worth mentioning that this connection structure achieves dual protection in terms of installation accuracy and anti-loosening through the anti-loosening guide bushing. The anti-loosening guide bushing has an interference fit with the bolt hole 4, and the inner hole is precisely matched with the bolt. With the guide angles at both ends, it ensures that the coaxiality error during bolt installation is effectively reduced, thereby avoiding stress concentration on one side of the thread caused by bolt misalignment in traditional clearance fits. In addition, the elastic deformation of the loose guide bushing 5 can compensate for the reduction of bolt preload. Combined with the staggered arrangement of bolts, it makes the preload distribution of each bolt more uniform, preventing individual bolts from loosening or breaking due to insufficient preload.

[0044] It is worth mentioning that this connection structure, by arranging the bolts in an alternating inner and outer ring configuration, ensures that the bolt stress is evenly distributed along the flange circumference, avoiding the stress superposition problem of adjacent bolts in the traditional single-ring arrangement and reducing load fluctuations of individual bolts. Furthermore, a stress sensor can be installed in the stress sensor detection hole 11, allowing for real-time monitoring of stress changes in the outer ring bolts. When an abnormal stress is detected in a bolt, an early warning can be issued, prompting relevant personnel to intervene and prevent sudden breakage.

[0045] In this connection structure, the surface treatment layer and protective coating enhance the overall corrosion resistance of the structure, preventing bolts and flanges from rusting. The surface treatment layer is a nitrided layer formed by ion nitriding, and the protective coating is a ceramic composite coating.

[0046] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A centrifuge bearing housing connection structure, characterized in that, The equipment includes a bearing housing body (1), and the connecting ends of the bearing housing body (1) and the connecting ends of the equipment housing are respectively provided with stepped sealing pressure flanges (2) for sealing and positioning; the outer side of the stepped sealing pressure flanges (2) is provided with a reinforcing structure; an elastic buffer layer (3) for buffering vibration is provided between the stepped sealing pressure flanges (2); the bolt holes (4) of the stepped sealing pressure flanges (2) are fitted with anti-loosening guide bushings; the stepped sealing pressure flanges (2), the elastic buffer layer (3), and the anti-loosening guide bushings are connected by bolts.

2. The centrifuge bearing housing connection structure according to claim 1, characterized in that, The reinforcing structure includes multiple layers of annular reinforcing ribs (6) concentrically sleeved on the outer side of the stepped sealing pressure flange (2). One end of the annular reinforcing ribs (6) is connected to the outer side of the stepped sealing pressure flange (2), and the other end is connected to the outer side of the bearing housing body (1) or the equipment housing. The annular reinforcing ribs (6) are provided with at least two rings.

3. The centrifuge bearing housing connection structure according to claim 2, characterized in that, The annular reinforcing rib (6) and the stepped sealing pressure flange (2) are smoothly integrated and formed together.

4. The centrifuge bearing housing connection structure according to claim 1, characterized in that, The sealing surface of the stepped sealing pressure flange (2) is stepped, including a main sealing surface (7) and an auxiliary mounting surface (8). The auxiliary mounting surface (8) is set higher than the main sealing surface (7) and located outside the main sealing surface (7). The main sealing surface (7) has a mounting groove (9) for installing the sealing element. The mounting groove (9) is arranged around the main sealing surface (7).

5. The centrifuge bearing housing connection structure according to claim 1, characterized in that, The elastic buffer layer (3) is disposed between the auxiliary mounting surfaces (8) of the two stepped sealing pressure flanges (2); the elastic buffer layer (3) has a clearance hole (10) corresponding to the bolt hole (4), and the diameter of the clearance hole (10) is larger than the diameter of the bolt.

6. The centrifuge bearing housing connection structure according to claim 1, characterized in that, The inner hole of the anti-loosening guide bushing matches the bolt, the outer circle of the anti-loosening guide bushing is interference-fitted with the bolt hole (4) of the stepped sealing pressure flange (2), and guide angle structures are provided at both ends of the anti-loosening guide bushing.

7. The centrifuge bearing housing connection structure according to claim 1, characterized in that, The bolts are arranged in an alternating inner and outer ring pattern on the stepped sealing pressure flange (2). The outer ring bolts and the inner ring bolts are distributed around the central axis of the stepped sealing pressure flange (2). The outer ring bolts and the inner ring bolts are arranged alternately, and the bolts are all located in an area at a certain distance from the edge of the stepped sealing pressure flange (2).

8. The centrifuge bearing housing connection structure according to claim 7, characterized in that, The outer portion of the bolt is provided with a detection hole (11) for mounting a stress sensor, the detection hole (11) extending inward from the head end of the bolt along the axis of the bolt.

9. The centrifuge bearing housing connection structure according to claim 1, characterized in that, The inner surface of the bearing housing body (1) is provided with a surface treatment layer, and the outer surface of the bearing housing body (1) and the outer surface of the stepped sealing pressure flange (2) are both provided with a protective coating.

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