Bearing block and centrifuge

Abstract

The application relates to the technical field of bearing seats, and particularly discloses a bearing seat and a centrifugal machine, which comprise a bearing, a first bushing, a second bushing, a shell and an oil inlet pipe, the bearing is sleeved on a rotating shaft and the inner ring rotates synchronously with the rotating shaft; the first and second bushings are sleeved on the rotating shaft and rotate synchronously with the rotating shaft; the shell comprises a body, a first end cover and a second end cover, the body is provided with an annular through hole, the annular through hole contains the bearing, the first and second bushings, the first end cover is sleeved on the rotating shaft and opposite to the first bushing, the first end cover closes the gap between the body and the rotating shaft, the first bushing and the first end cover form a first labyrinth structure, the second end cover is sleeved on the rotating shaft and opposite to the second bushing, the second end cover closes the gap between the body and the rotating shaft, and the second bushing and the second end cover form a second labyrinth structure. The labyrinth structure improves the sealing effect of the shell of the bearing seat, prevents the overflow of lubricating liquid, reduces the pollution to the environment, and improves the utilization rate of lubricating oil.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bearing seat, in particular to a bearing seat and a centrifugal machine. BACKGROUND

[0002] The centrifugal machine utilizes the centrifugal force generated by the high-speed rotation of the drum to make the solid particles in the processed material sink to the drum wall due to their large density, and are scraped and discharged to one end by the spiral discharge blade, thereby achieving the effect of solid-liquid separation.

[0003] Among them, the drum and the frame are connected through the bearing seat, and when the drum rotates at high speed, the bearing in the bearing seat rotates at high speed, therefore, the bearing inside the bearing seat needs to be lubricated by oil injection, in order to prevent the lubricating oil from polluting the environment and improve the utilization rate of the lubricating oil, the bearing is usually sealed in the shell by using a sealed shell, but the current shell usually uses a rubber pad for sealing, the rubber pad pad is easy to cause wear and aging after long-term use, thereby causing the overflow of the lubricating liquid, and further causing the pollution to the environment and the reduction of the utilization rate of the lubricating oil. SUMMARY

[0004] The purpose of the present application is to provide a bearing seat and a centrifugal machine to solve the problem that the current shell of the bearing seat in the related art usually uses a rubber pad for sealing, the rubber pad pad is easy to cause wear and aging after long-term use, thereby causing the overflow of the lubricating liquid, and further causing the pollution to the environment and the reduction of the utilization rate of the lubricating oil.

[0005] In one aspect, the present application provides a bearing seat, comprising:

[0006] a bearing for sleeving a rotating shaft, and an inner ring of the bearing rotating synchronously with the rotating shaft;

[0007] a first bushing and a second bushing for sleeving the rotating shaft and rotating synchronously with the rotating shaft;

[0008] a housing comprising a body, a first end cover and a second end cover, the body is provided with an annular through hole for accommodating the bearing, the first bushing and the second bushing, the first end cover is used for sleeving the rotating shaft and opposite to the first bushing, the first end cover closes the gap between the body and the rotating shaft, the first bushing and the first end cover form a first labyrinth structure, the second end cover is used for sleeving the rotating shaft and opposite to the second bushing, the second end cover closes the gap between the body and the rotating shaft, the second bushing and the second end cover form a second labyrinth structure;

[0009] an oil inlet pipe extending into the annular through hole and opposite to one end surface of the bearing.

[0010] The first end cover forms a third labyrinth structure with the rotating shaft.

[0011] The second end cover forms a fourth labyrinth structure with the rotating shaft.

[0012] The third bushing is sleeved on the rotating shaft and rotates synchronously with the rotating shaft, the third bushing is located between the bearing and the second bushing, the static ring is located in the annular through hole and is fixedly connected with the body, and the static ring and the third bushing form a fifth labyrinth structure.

[0013] The third bushing and the static ring are opposite to each other in the axial direction of the rotating shaft, a plurality of first protrusions are arranged on the surface of the third bushing opposite to the static ring, a plurality of second protrusions are arranged on the surface of the static ring opposite to the third bushing, and the plurality of first protrusions and the plurality of second protrusions form the fifth labyrinth structure.

[0014] The second protrusion is provided with a chamfer at the end away from the static ring.

[0015] The oil inlet pipe is arranged between the first bushing and the bearing, and the surface of the third bushing opposite to the bearing is recessed with an eddy current groove.

[0016] The bearing seat further comprises an oil storage ring, the oil storage ring is arranged in the annular through hole and located between the bearing and the oil inlet pipe, the oil storage ring is fixedly connected with the body, in the direction of gravity, the side of the oil storage ring close to the ground surrounds the bearing to form an oil storage groove, and the opening of the oil storage groove is opposite to the rotating shaft.

[0017] The bearing seat further comprises an oil collection tank, in the direction of gravity, the oil collection tank is arranged outside the shell and communicates with the position close to the ground of the annular through hole.

[0018] In another aspect, the application provides a centrifugal machine comprising the bearing seat according to any one of the above-mentioned solutions.

[0019] The application has the following beneficial effects:

[0020] The application provides a bearing seat and a centrifuge. The bearing seat comprises a bearing, a first bushing, a second bushing, a shell and an oil inlet pipe. The bearing is sleeved on a rotating shaft, and the inner ring of the bearing rotates synchronously with the rotating shaft. The first bushing and the second bushing are sleeved on the rotating shaft and rotate synchronously with the rotating shaft. The shell comprises a body, a first end cover and a second end cover. The body is provided with an annular through hole for accommodating the bearing, the first bushing and the second bushing. The first end cover is sleeved on the rotating shaft and opposite to the first bushing, and the first end cover closes the gap between the body and the rotating shaft. The first bushing and the first end cover form a first labyrinth structure. The second end cover is sleeved on the rotating shaft and opposite to the second bushing, and the second end cover closes the gap between the body and the rotating shaft. The second bushing and the second end cover form a second labyrinth structure. The oil inlet pipe extends into the annular through hole and is opposite to one end surface of the bearing. When the rotating shaft rotates at high speed, the rotating shaft drives the bearing to rotate. At this time, the oil inlet pipe sprays lubricating oil to lubricate the bearing. The high-speed rotating bearing and the rotating shaft atomize the lubricating liquid sprayed by the oil inlet pipe. At this time, the lubricating oil moves to the gap between the first end cover and the rotating shaft and the gap between the first end cover and the rotating shaft. Because the first bushing and the first end cover form the first labyrinth structure, and the second bushing and the second end cover form the second labyrinth structure, after the atomized lubricating oil enters the first labyrinth structure and the second labyrinth structure, the first labyrinth structure and the second labyrinth structure can intercept the lubricating oil gas in them, thereby preventing the lubricating oil from leaking from the gap between the first end cover and the rotating shaft and the gap between the second end cover and the rotating shaft, improving the sealing effect of the shell of the bearing seat, preventing the lubricating liquid from overflowing, reducing the pollution to the environment, and improving the utilization rate of the lubricating oil. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the bearing seat and the centrifuge in the embodiment of the application.

[0022] Figure 2 It is a structural schematic diagram of the bearing seat and the centrifuge in the embodiment of the application. Figure 1 It is a partial enlarged view of A in the figure.

[0023] Figure 3 It is a partial enlarged view of B in the figure. Figure 1

[0024] In the figure:

[0025] 100, rotating shaft;

[0026] 1, bearing; 2, first bushing; 3, second bushing;

[0027] 41, body; 42, first end cover; 43, second end cover;

[0028] 5, oil inlet pipe; 6, third bushing; 61, first protrusion; 62, vortex groove; 7, static ring; 71, chamfer; 72, second protrusion; 8, exhaust pipe; 9, oil storage ring; 91, oil storage groove; 10, oil collecting tank.​ DETAILED DESCRIPTION

[0029] The technical solutions of the present application will be described clearly and completely below in conjunction with the drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0030] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", etc. are only for the purpose of description, and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions, and moreover, the "above", "over" and "on" of the first feature to the second feature include the vertical direction of the first feature above and obliquely above the second feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The "below", "under" and "under" of the first feature to the second feature include the vertical direction of the first feature below and obliquely below the second feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0031] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0032] The embodiments of the present application will be described in detail below, and the examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent 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 application, and cannot be understood as a limitation on the present application.

[0033] As Figures 1-3As shown, the bearing seat provided by the embodiment comprises a bearing 1, a first bushing 2, a second bushing 3, a shell and an oil inlet pipe 5, the bearing 1 is sleeved on the rotating shaft 100 and the inner ring of the bearing 1 rotates synchronously with the rotating shaft 100; the first bushing 2 and the second bushing 3 are sleeved on the rotating shaft 100 and rotate synchronously with the rotating shaft 100; the shell comprises a body 41, a first end cover 42 and a second end cover 43, the body 41 is provided with an annular through hole for accommodating the bearing 1, the first bushing 2 and the second bushing 3, the first end cover 42 is sleeved on the rotating shaft 100 and opposite to the first bushing 2, the first end cover 42 closes the gap between the body 41 and the rotating shaft 100, the first bushing 2 and the first end cover 42 form a first labyrinth structure, the second end cover 43 is sleeved on the rotating shaft 100 and opposite to the second bushing 3, the second end cover 43 closes the gap between the body 41 and the rotating shaft 100, the second bushing 3 and the second end cover 43 form a second labyrinth structure; the oil inlet pipe 5 extends into the annular through hole and opposite to one end surface of the bearing 1. When the rotating shaft 100 rotates at high speed, the rotating shaft 100 drives the bearing 1 to rotate, at this time, the oil inlet pipe 5 sprays lubricating oil to lubricate the bearing 1, the high-speed rotating bearing 1 and the rotating shaft 100 atomize the lubricating liquid sprayed by the oil inlet pipe 5, at this time, the lubricating oil moves to the gap between the first end cover 42 and the rotating shaft 100 and the gap between the first end cover 42 and the rotating shaft 100, because the first bushing 2 and the first end cover 42 form a first labyrinth structure and the second bushing 3 and the second end cover 43 form a second labyrinth structure, therefore, after the atomized lubricating oil enters the first labyrinth structure and the second labyrinth structure, the first labyrinth structure and the second labyrinth structure will have a flow blocking effect on the lubricating oil gas in them, thereby preventing leakage from between the first end cover 42 and the first rotating shaft 100 and between the second end cover 43 and the second rotating shaft 100, thereby improving the sealing effect of the shell of the bearing seat, preventing the overflow of lubricating liquid, reducing the pollution to the environment and improving the utilization rate of lubricating oil.

[0034] Optionally, the first end cover 42 and the rotating shaft 100 form a third labyrinth structure. In the embodiment, in order to improve the sealing structure of the shell and prevent the lubricating liquid in the first labyrinth structure from flowing out of the gap between the first end cover 42 and the rotating shaft 100, a plurality of grooves are spaced apart and recessed on the surface of the first end cover 42 opposite to the rotating shaft 100 along the axial direction of the rotating shaft 100, thereby forming a third labyrinth structure between the first end cover 42 and the rotating shaft 100. The third labyrinth structure has the same function as the first labyrinth structure, which will not be described here.

[0035] Optionally, the second end cover 43 and the rotating shaft 100 form a fourth labyrinth structure. In this embodiment, in order to improve the sealing structure of the shell and prevent the lubricating liquid in the second labyrinth structure from flowing out of the gap between the second end cover 43 and the rotating shaft 100, a flange is protruded around the outer circumferential surface of the rotating shaft 100, the second end cover 43 is located between the body 41 and the flange, the second end cover 43 and the flange are respectively provided with a plurality of annular protrusions and a plurality of grooves, the plurality of protrusions and the plurality of grooves are one-to-one correspondingly inserted, and the second end cover 43 and the flange form the fourth labyrinth structure. The second labyrinth structure has the same function as the second labyrinth structure, and details are not repeated here.

[0036] Optionally, the bearing seat further comprises a third bushing 6, a static ring 7, and an exhaust pipe 8. The exhaust pipe 8 extends into the body 41 and communicates the annular through hole with the outside. The exhaust pipe 8 is located between the bearing 1 and the second bushing 3. The third bushing 6 is used to be sleeved on the rotating shaft 100 and synchronously rotates with the rotating shaft 100. The third bushing 6 is located between the bearing 1 and the second bushing 3. The static ring 7 is located in the annular through hole and is fixedly connected with the body 41. The static ring 7 and the third bushing 6 form a fifth labyrinth structure. In this embodiment, the function of the exhaust pipe 8 is to prevent the internal and external pressure difference from being too large, so that when the rotating shaft 100 rotates at high speed, the internal gas expands due to heat, and then the gas is discharged. However, after the atomized lubricating liquid drifts from the end of the bearing 1 close to the first end cover 42 to the end of the bearing 1 close to the second end cover 43, the atomized lubricating liquid is prone to being discharged together with the gas from the exhaust pipe 8. To solve this problem, the static ring 7 and the third bushing 6 are arranged between the bearing 1 and the second bushing 3, and the static ring 7 and the third bushing 6 form the fifth labyrinth structure. The throttling effect of the fifth labyrinth structure can reduce the flow speed of the atomized lubricating oil gas, so that the atomized lubricating oil condenses into droplets. The atomized lubricating oil gas can be prevented from being discharged from the exhaust pipe 8, thereby preventing the influence on the external environment and improving the utilization efficiency of the lubricating oil.

[0037] For the specific structure of the fifth labyrinth structure, optionally, a plurality of first protrusions 61 are protruded on the surface of the third bushing 6 opposite to the static ring 7 in the axial direction of the rotating shaft 100, a plurality of second protrusions 72 are protruded on the surface of the static ring 7 opposite to the third bushing 6, and the plurality of first protrusions 61 and the plurality of second protrusions 72 form the fifth labyrinth structure.

[0038] Optionally, the second protrusion 72 is provided with a chamfer 71 at the end away from the static ring 7. In this embodiment, the chamfer 71 can improve the throttling effect of the fifth labyrinth structure.

[0039] Optionally, the oil inlet pipe 5 is arranged between the first bushing 2 and the bearing 1, and the third bushing 6 is concave with a vortex groove 62 on the surface opposite to the bearing 1. In this embodiment, when the atomized lubricating liquid drifts from one end of the bearing 1 close to the first end cover 42 to the other end of the bearing 1 close to the second end cover 43, the atomized lubricating liquid will enter the vortex groove 62, and then form a vortex, which can accelerate the condensation of the atomized lubricating liquid.

[0040] Optionally, the bearing seat further comprises an oil storage ring 9 arranged in the annular through hole and between the bearing 1 and the oil inlet pipe 5, and the oil storage ring 9 is fixedly connected with the body 41. In the direction of gravity, the side of the oil storage ring 9 close to the ground is surrounded by the bearing 1 to form an oil storage groove 91, and the opening of the oil storage groove 91 is opposite to the rotating shaft 100. In this embodiment, the oil droplets condensed on the first bushing 2 flow into the oil storage groove 91 under the action of gravity. Since the oil storage groove 91 is surrounded by the bearing 1 and the oil storage ring 9, the lubricating oil in the oil storage groove 91 can also play a role in lubricating and cooling the bearing 1.

[0041] Optionally, the bearing seat further comprises an oil collecting tank 10 arranged outside the shell and in communication with the position close to the ground of the annular through hole. In this embodiment, the lubricating oil finally flows to the position close to the ground of the annular through hole under the action of gravity. Since the oil collecting tank 10 is arranged outside the shell and in communication with the position close to the ground of the annular through hole, the lubricating oil is finally collected by the oil collecting tank 10.

[0042] The embodiment further provides a centrifugal machine comprising the bearing seat in the above-mentioned scheme.

[0043] Obviously, the above-mentioned embodiments of the present application are only examples for clearly illustrating the present application, and are not intended to limit the implementation modes of the present application. Based on the above-mentioned description, any other different forms of changes or variations can be made by those skilled in the art. Here, it is not necessary and also impossible to exhaust all the implementation modes. Any modification, equivalent replacement and improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. A bearing block, characterized in that The utility model relates to a bearing (1) for sleeving a rotating shaft (100) and the inner ring of the bearing (1) rotates synchronously with the rotating shaft (100), a first bushing (2) and a second bushing (3) for sleeving the rotating shaft (100) and rotating synchronously with the rotating shaft (100), a shell including a body (41), a first end cover (42) and a second end cover (43), the body (41) is provided with annular through hole for accommodating the bearing (1), the first bushing (2) and the second bushing (3), the first end cover (42) is used for sleeving the rotating shaft (100) and is opposite the first bushing (2), the first end cover (42) closes the gap between the body (41) and the rotating shaft (100), and the first bushing (2) forms the first labyrinth structure with the first end cover (42), the second end cover (43) is used for sleeving the rotating shaft (100) and is opposite the second bushing (3), the second end cover (43) closes the gap between the body (41) and the rotating shaft (100), and the second bushing (3) forms the second labyrinth structure with the second end cover (43), an oil inlet pipe (5) extends into the annular through hole and is opposite one end surface of the bearing (1), a third bushing (6), a static ring (7) and an exhaust pipe (8) extend into the body (41) and communicate the annular through hole with the outside, the exhaust pipe (8) is located between the bearing (1) and the second bushing (3), the third bushing (6) is used for sleeving the rotating shaft (100) and rotates synchronously with the rotating shaft (100), and the third bushing (6) is located between the bearing (1) and the second bushing (3), the static ring (7) is located in the annular through hole and is fixedly connected with the body (41), and the static ring (7) forms the fifth labyrinth structure with the third bushing (6), a plurality of first protrusions (61) are arranged on the surface of the third bushing (6) opposite the static ring (7) in the axial direction of the rotating shaft (100), a plurality of second protrusions (72) are arranged on the surface of the static ring (7) opposite the third bushing (6), and the plurality of first protrusions (61) and the plurality of second protrusions (72) form the fifth labyrinth structure, the oil inlet pipe (5) is arranged between the first bushing (2) and the bearing (1), and the surface of the third bushing (6) opposite the bearing (1) is recessed with an eddy current groove (62). The first end cover (42) forms the third labyrinth structure with the rotating shaft (100). The second end cover (43) forms the fourth labyrinth structure with the rotating shaft (100). The second protrusion (72) is provided with a chamfer (71) away from the static ring (7). ​ ​ ​ ​ 2. The bearing seat of claim 1, wherein ​ 3. The bearing seat of claim 1, wherein ​ 4. The bearing seat of claim 1, wherein ​ 5. The bearing seat of claim 1, wherein Further comprising an oil storage ring (9) arranged in the annular through hole and located between the bearing (1) and the oil inlet pipe (5), the oil storage ring (9) is fixed with the body (41), and along the direction of gravity, the side of the oil storage ring (9) close to the ground is surrounded with the bearing (1) to form an oil storage groove (91), and the opening of the oil storage groove (91) is opposite to the rotating shaft (100).

6. The bearing seat of claim 1, wherein Further comprising an oil collecting tank (10) arranged outside the shell and communicated with the position close to the ground of the annular through hole along the direction of gravity.

7. A centrifuge, characterised in that, The bearing seat according to any one of claims 1-6.

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