Bearing lubricating structure and vertical centrifugal machine

Abstract

The utility model discloses a bearing lubricating structure and a vertical centrifugal machine, and relates to the technical field of centrifugal machine equipment. The bearing lubricating structure is arranged on a main shaft of the vertical centrifugal machine and comprises an oil injection path, an oil baffle plate and a lower oil seal. The oil injection path is formed in the main shaft and comprises an oil inlet and an oil outlet, and the oil inlet is formed in the upper end of the main shaft; the main shaft is sleeved with an upper bearing and a lower bearing; the oil baffle plate is arranged on the main shaft, the oil baffle plate is positioned below the upper bearing, and an oil leakage hole is formed in the oil baffle plate; the lower oil seal is arranged on the main shaft; according to the bearing lubricating structure provided by the utility model, the oil filling path is arranged on the main shaft of the centrifugal machine, and oil is filled into the oil inlet of the oil filling path, so that the interior of the upper bearing can be filled with oil for lubrication, and after the oil filling in the upper bearing is completed, the lubricating oil can fall onto the lower bearing through the oil leakage hole of the oil baffle plate and is cut off by the lower oil seal; therefore, the upper bearing and the lower bearing can be lubricated by oil injection without dismounting the centrifugal machine.

Description

Technical Field

[0001] The utility model relates to the technical field of centrifuges, in particular to a bearing lubrication structure and a vertical centrifuge. Background Art

[0002] Under the background of the existing technology, as a key equipment widely used in multiple industries such as chemical industry, pharmaceutical industry, and food industry, the performance and stability of vertical centrifuges directly affect production efficiency and product quality. However, a significant technical problem lies in the maintenance of the main shaft bearings. Specifically, in the design or operation practice of such centrifuges, there is often a dilemma that the main shaft bearings cannot be directly lubricated with oil for maintenance. This limitation directly leads to a harsh working environment for the bearings and insufficient lubrication, thereby significantly shortening the service life of the bearings.

[0003] Generally, the oil replenishment and lubrication operation of the bearings can only be carried out when the centrifuge is shut down and the main shaft is disassembled for maintenance or replacement, which undoubtedly increases the maintenance cost of the equipment and the risk of production interruption. In addition, due to the lack of necessary oil replenishment and lubrication for a long time, tiny particulate matters will gradually accumulate inside the bearings. These impurities will not only exacerbate wear in the bearing clearance but may also solidify in a high-temperature environment to form deposits that are difficult to remove. These deposits not only further hinder the normal flow of lubricating oil but may also damage the geometric accuracy and balance of the bearings, ultimately resulting in abnormal phenomena such as increased vibration and noise during the operation of the centrifuge. In severe cases, it may even cause the centrifuge to malfunction or be damaged, bringing significant economic losses and safety hazards to the enterprise. Summary of the Utility Model

[0004] In view of this, the purpose of the utility model is to overcome the deficiencies in the related technologies. The utility model provides a bearing lubrication structure and a vertical centrifuge.

[0005] The utility model provides the following technical solutions:

[0006] A bearing lubrication structure is arranged on the main shaft of a vertical centrifuge. The bearing lubrication structure includes an oil injection path, an oil baffle, and a lower oil seal.

[0007] The oil injection path is opened on the main shaft. The oil injection path includes an oil inlet and an oil outlet. The oil inlet is arranged at the upper end of the main shaft, and the oil outlet is arranged on the side wall of the main shaft. An upper bearing and a lower bearing are sequentially sleeved on the main shaft in the vertical direction. The oil outlet is located above the upper bearing. The oil baffle is installed on the main shaft. The oil baffle is located below the upper bearing, and the oil baffle is provided with oil leakage holes. The lower oil seal is arranged on the main shaft. The lower oil seal is located below the lower bearing.

[0008] As a further improvement of the above technical solution, an upper oil seal is also provided on the main shaft, and the upper oil seal is located above the oil outlet.

[0009] As a further improvement of the above technical solution, the oil injection circuit includes a first oil circuit and a second oil circuit. The first oil circuit is vertically arranged, and the second oil circuit is horizontally arranged. The upper end of the first oil circuit is the oil inlet, the lower end of the first oil circuit is communicated with the second oil circuit, and the end of the second oil circuit away from the first oil circuit is the oil outlet.

[0010] As a further improvement of the above technical solution, a plurality of the second oil circuits are circumferentially and uniformly arranged with respect to the axis of the main shaft.

[0011] As a further improvement of the above technical solution, a plurality of oil leakage holes are provided on the oil baffle.

[0012] As a further improvement of the above technical solution, the oil outlet of the second oil circuit is arranged in a dislocation manner with the oil leakage hole.

[0013] As a further improvement of the above technical solution, the diameter of the oil leakage hole is smaller than the diameter of the oil outlet.

[0014] As a further improvement of the above technical solution, a spacer sleeve is sleeved outside the main shaft. The spacer sleeve is located between the oil baffle and the lower bearing, and there are gaps between the oil leakage hole and the outer side wall of the main shaft and the inner side wall of the spacer sleeve.

[0015] As a further improvement of the above technical solution, a gland is provided below the lower oil seal. The gland is installed on the main shaft, and the gland is used to provide support and limit for the lower oil seal.

[0016] As a further improvement of the above technical solution, a dust plug is installed on the oil inlet.

[0017] The present invention also provides a vertical centrifuge, including the bearing lubrication structure as described in any one of the above.

[0018] Compared with the related art, the beneficial effects of the present invention are:

[0019] The bearing lubrication structure designed by the present invention aims to significantly improve the lubrication efficiency and maintenance convenience of the bearings on the main shaft of the vertical centrifuge.

[0020] When lubricating the upper bearing and the lower bearing on the main shaft of the vertical centrifuge, the operator only needs to slowly inject an appropriate amount of lubricating oil from the oil inlet through the preset oil injection path on the main shaft. As the lubricating oil is injected, it flows along the oil injection path and finally is released from the oil outlet, directly falling on the surface of the upper bearing to achieve preliminary wetting. The oil baffle designed below the upper bearing not only prevents the lubricating oil from splashing, but also promotes the accumulation and retention of the lubricating oil around the upper bearing by virtue of its unique structural characteristics. Due to the inherent viscosity of the lubricating oil, the oil will gradually accumulate after contacting the oil baffle until an adequate oil film is formed, completely covering and submerging the upper bearing to ensure the maximization of the lubrication effect. Subsequently, the excess lubricating oil will slowly drip along the preset oil leakage holes on the oil baffle, fall on the lower bearing, and continue to perform its lubrication mission. The lubricating oil dripping onto the lower bearing not only directly wets its surface, but also penetrates through the gaps of the lower bearing into the lower oil seal area below it to form a protective oil film. With the continuous dripping and accumulation of the lubricating oil, the lower bearing is also completely submerged in the oil, achieving comprehensive and balanced lubrication of the upper and lower bearings.

[0021] Another major advantage of this lubrication structure lies in its simplicity of operation and high efficiency of maintenance. The entire lubrication process does not require cumbersome disassembly and recombination of the centrifuge, greatly saving time and labor costs. At the same time, by regularly injecting lubricating oil into the bearings, it can not only effectively isolate the risk of materials invading the bearing gaps during the working process, reduce wear and failures, but also significantly improve the running stability and service life of the bearings, providing a solid guarantee for the long-term efficient operation of the centrifuge.

[0022] To make the above objects, features, and advantages of the present utility model more obvious and understandable, the following specifically gives preferred embodiments and, in conjunction with the accompanying drawings, makes the following detailed description. Description of the Drawings

[0023] To more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other relevant drawings can also be obtained based on these drawings.

[0024] Figure 1 Shows a perspective structural schematic diagram of the bearing lubrication structure in an embodiment of the present utility model.

[0025] Main element symbol description:

[0026] 110 - Main shaft; 120 - Upper bearing; 130 - Lower bearing; 140 - Oil baffle; 141 - Oil leakage hole; 150 - Lower oil seal; 151 - gland; 160 - Upper oil seal; 170 - Spacer sleeve; 200 - Oil injection passage; 210 - First oil passage; 211 - Oil inlet; 220 - Second oil passage; 221 - Oil outlet. Detailed implementation manner

[0027] The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0028] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0029] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more unless otherwise specifically defined.

[0030] In the present invention, unless otherwise clearly defined and limited, the terms "mounted", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] In the present utility model, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0032] Embodiment 1

[0033] Combined Figure 1 As shown, this embodiment provides a bearing lubrication structure disposed on the main shaft 110 of a vertical centrifuge. The bearing lubrication structure includes an oil injection passage 200, an oil baffle 140, and a lower oil seal 150.

[0034] The oil injection passage 200 is opened on the main shaft 110. The oil injection passage 200 includes an oil inlet 211 and an oil outlet 221. The oil inlet 211 is disposed at the upper end of the main shaft 110, and the oil outlet 221 is disposed on the side wall of the main shaft 110. An upper bearing 120 and a lower bearing 130 are sequentially sleeved on the main shaft 110 in the vertical direction. The oil outlet 221 is located above the upper bearing 120. The oil baffle 140 is installed on the main shaft 110. The oil baffle 140 is located below the upper bearing 120, and the oil baffle 140 is provided with an oil leakage hole 141. The lower oil seal 150 is disposed on the main shaft 110. The lower oil seal 150 is located below the lower bearing 130.

[0035] For the bearing lubrication structure provided in this embodiment, when it is necessary to lubricate the upper bearing 120 and the lower bearing 130 on the main shaft 110 of the vertical centrifuge, the operator only needs to slowly inject an appropriate amount of lubricating oil from the oil inlet 211 through the preset oil injection path 200 on the main shaft 110. As the lubricating oil is injected, it flows along the oil injection path 200 and finally is released from the oil outlet 221, directly falling on the surface of the upper bearing 120 to achieve preliminary wetting. The oil baffle 140 designed below the upper bearing 120 not only plays a role in preventing the splashing of the lubricating oil, but also promotes the accumulation and retention of the lubricating oil around the upper bearing 120 by virtue of its unique structural characteristics. Due to the inherent viscosity of the lubricating oil, the oil liquid will gradually accumulate after contacting the oil baffle 140 until a sufficient oil film is formed to completely cover and immerse the upper bearing 120, ensuring the maximization of the lubrication effect. Subsequently, the excess lubricating oil will slowly drip along the preset oil leakage holes 141 of the oil baffle 140 and fall on the lower bearing 130 to continue its lubrication mission. The lubricating oil dripping onto the lower bearing 130 not only directly wets its surface, but also penetrates through the gap of the lower bearing 130 into the area of the lower oil seal 150 below it to form a protective oil film. With the continuous dripping and accumulation of the lubricating oil, the lower bearing 130 is also completely immersed in the oil liquid, achieving comprehensive and balanced lubrication of the upper and lower bearings 130.

[0036] The entire lubrication process of this embodiment does not require the cumbersome disassembly and recombination of the centrifuge, greatly saving time and labor costs. At the same time, by regularly injecting lubricating oil into the bearings, it can not only effectively isolate the risk of material intrusion into the bearing clearance during the working process, reduce wear and failures, but also significantly improve the running stability and service life of the bearings, providing a solid guarantee for the long-term and efficient operation of the centrifuge.

[0037] In some specific embodiments, an upper oil seal 160 is further provided on the main shaft 110, and the upper oil seal 160 is located above the oil outlet 221; specifically, when performing the oil injection and wetting operation on the upper bearing 120, the upper oil seal 160 and the oil baffle 140 arranged below cooperate with each other to jointly form a tight accommodating cavity, ensuring that the lubricating oil injected from the oil outlet 221 can first be guided into this closed accommodating cavity, thereby avoiding the possibility of direct splashing or disordered flow of the lubricating oil. As the lubricating oil is continuously injected, the accommodating cavity is gradually filled until it reaches a saturated state.

[0038] After the accommodating cavity is fully filled, if lubricating oil continues to be injected, the excess oil will slowly squeeze out through the carefully designed oil leakage holes 141 on the oil baffle 140 under pressure and precisely drip onto the lower bearing 130 for further wetting. This process not only ensures that the upper bearing 120 can be comprehensively and evenly wetted, effectively eliminating the bubble voids caused by uneven lubrication, but also greatly reduces the risk of overflow due to excessive lubricating oil, thus significantly improving the safety and stability of the entire oil injection process.

[0039] In some specific embodiments, the oil injection path 200 includes a first oil path 210 and a second oil path 220. The first oil path 210 is vertically arranged, and the second oil path 220 is horizontally arranged. The upper end of the first oil path 210 is an oil inlet 211, the lower end of the first oil path 210 is communicated with the second oil path 220, and the end of the second oil path 220 far from the first oil path 210 is an oil outlet 221. The first oil path 210 is designed to extend in the vertical direction. Such a layout is conducive to the natural fall of the lubricating oil under the action of gravity, reducing the flow resistance, and at the same time facilitating the control of the flow direction and speed of the oil. Its top is set as the oil inlet 211, which is convenient for connecting an external oil pump or oil storage device to achieve the efficient input of lubricating oil.

[0040] The lower end of the first oil path 210 is cleverly connected to the horizontally arranged second oil path 220, forming a smooth turning point. The design of the second oil path 220 not only takes into account the effective use of space but also ensures that the lubricating oil can be evenly distributed and maintain a stable speed before entering the key lubrication points. The end of the second oil path 220 far from the first oil path 210 is set as the oil outlet 221. The selection of this position is usually based on the specific position of the lubrication point to ensure that the lubricating oil can directly and accurately reach the surface of the upper bearing 120 that needs to be lubricated.

[0041] In some specific embodiments, a plurality of the second oil paths 220 are circumferentially arranged around the axis of the main shaft 110, which is convenient for evenly wetting each part of the upper bearing 120 and avoiding the problems of insufficient local lubrication or excessive lubrication.

[0042] In some specific embodiments, a plurality of the oil leakage holes 141 provided on the oil baffle 140 are provided, which is convenient for realizing the rapid dripping of the oil and improving the lubrication efficiency of the lower bearing 130.

[0043] In some specific embodiments, the oil outlet 221 of the second oil path 220 is arranged in a staggered manner with the oil leakage holes 141. This staggered arrangement can effectively prevent the fresh lubricating oil discharged from the oil outlet 221 from directly impacting and accumulating in the area of the oil baffle 140 near the oil leakage holes 141.

[0044] If the oil outlet 221 is close to or opposite the oil leakage hole 141, the newly injected lubricating oil may, under the action of gravity and inertia, quickly accumulate at the edge of the oil baffle 140 without fully wetting the bearing, and then may directly pass through the oil leakage hole 141 and drip, causing the dual problems of insufficient lubrication and oil waste. Through the offset design, after flowing out of the oil outlet 221, the lubricating oil can flow along a predetermined path, fully cover and wet all corners of the upper bearing 120, and at the same time avoid direct contact with the oil leakage hole 141, ensuring the continuity and effectiveness of the lubrication process.

[0045] In some specific embodiments, the diameter of the oil leakage hole 141 is smaller than the diameter of the oil outlet 221, so as to extend the residence time of the lubricating oil on the oil baffle 140 and improve the wetting effect on the upper bearing 120.

[0046] In some specific embodiments, a spacer sleeve 170 is further sleeved outside the main shaft 110. The spacer sleeve 170 is located between the oil baffle 140 and the lower bearing 130. There are gaps between the oil leakage hole 141 and the outer side wall of the main shaft 110 and the inner side wall of the spacer sleeve 170, reducing the obstruction suffered by the oil dripping from the oil leakage hole 141 during the dripping process and improving the dripping efficiency of the lubricating oil.

[0047] In some specific embodiments, a gland 151 is provided below the lower oil seal 150. The gland 151 is connected and installed on the main shaft 110 by a pin shaft or a bolt. The gland 151 is used to provide support and limit for the lower oil seal 150, so as to prevent the lower oil seal 150 from shifting in position when subjected to a large oil pressure, ensuring the use reliability of this embodiment.

[0048] In some specific embodiments, a dust plug is installed on the oil inlet 211. When it is not necessary to inject oil and wet the upper bearing 120 and the lower bearing 130, the dust plug is used to provide protection for the oil inlet 211, and can effectively isolate dust, impurities and other tiny foreign matters in the external environment.

[0049] Embodiment 2

[0050] The present utility model also provides a vertical centrifuge. According to different rotation speeds, the vertical centrifuge can be divided into types such as a low-speed vertical separation centrifuge and a high-speed vertical separation centrifuge, and includes the bearing lubrication structure described in Embodiment 1. The bearing lubrication structure is arranged on the main shaft 110 of the vertical centrifuge, and the vertical centrifuge has all the beneficial effects of the bearing lubrication structure, which will not be described in detail here.

[0051] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0052] Although the embodiments of the present utility model have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present utility model. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present utility model.

Claims

1. A bearing lubrication structure is provided on the main shaft (110) of a vertical centrifuge, characterized in that, The bearing lubrication structure includes: An oil injection passage (200) is formed on the main shaft (110). The oil injection passage (200) includes an oil inlet (211) and an oil outlet (221). The oil inlet (211) is arranged at the upper end of the main shaft (110), and the oil outlet (221) is arranged on the side wall of the main shaft (110). An upper bearing (120) and a lower bearing (130) are sequentially sleeved on the main shaft (110) in the vertical direction. The oil outlet (221) is located above the upper bearing (120). An oil baffle (140) is installed on the main shaft (110). The oil baffle (140) is located below the upper bearing (120), and the oil baffle (140) is provided with an oil leakage hole (141). A lower oil seal (150) is arranged on the main shaft (110). The lower oil seal (150) is located below the lower bearing (130).

2. The bearing lubrication structure according to claim 1, characterized in that, An upper oil seal (160) is further arranged on the main shaft (110). The upper oil seal (160) is located above the oil outlet (221).

3. The bearing lubrication structure according to claim 1, wherein, The oil injection passage (200) includes a first oil passage (210) and a second oil passage (220). The first oil passage (210) is vertically arranged, and the second oil passage (220) is horizontally arranged. The upper end of the first oil passage (210) is the oil inlet (211), the lower end of the first oil passage (210) is communicated with the second oil passage (220), and the end of the second oil passage (220) far from the first oil passage (210) is the oil outlet (221).

4. The bearing lubrication structure according to claim 3, characterized in that, A plurality of the second oil passages (220) are circumferentially and uniformly distributed with respect to the axis of the main shaft (110).

5. The bearing lubrication structure according to claim 4, characterized in that, A plurality of the oil leakage holes (141) are provided on the oil baffle (140).

6. The bearing lubrication structure according to claim 5, characterized in that, The diameter of the oil leakage hole (141) is smaller than the diameter of the oil outlet (221).

7. The bearing lubrication structure according to any one of claims 1 to 6, characterized in that, An interval sleeve (170) is further sleeved outside the main shaft (110). The interval sleeve (170) is located between the oil baffle (140) and the lower bearing (130). There are gaps between the oil leakage hole (141) and the outer side wall of the main shaft (110) and the inner side wall of the interval sleeve (170).

8. The bearing lubrication structure according to any one of claims 1 to 6, characterized in that, A gland (151) is arranged below the lower oil seal (150). The gland (151) is installed on the main shaft (110), and the gland (151) is used to provide support and limit for the lower oil seal (150).

9. The bearing lubrication structure according to any one of claims 1 to 6, characterized in that, A dust plug is installed on the oil inlet (211).

10. A vertical centrifuge, characterized in that, It includes the bearing lubrication structure according to any one of claims 1 to 9.

Images