Improved bearing for a bag-hanging centrifuge

Abstract

The utility model discloses an improved generation hangs the bag centrifuge bearing, including inner bag part and bearing upper cover, bearing upper cover is connected with inner bag part, the bottom of bearing upper cover is equipped with main shaft bush and transmission part respectively, the inboard of main shaft bush is equipped with first bearing, second bearing and third bearing respectively, the inboard of first bearing, second bearing and third bearing is equipped with main shaft with bushing, the inboard of inner bag part is equipped with filter bag, the utility model discloses the bearing structure of improved generation, makes main shaft to have axial positioning, and when hoisting has the force to the top, utilizes main shaft and transmits force to bearing NJ2318E, and bearing NJ2318E has one -way axial limit left and right, to the force transmission to bearing outer ring, and then transmits to bearing upper cover, avoids main shaft and takes out the damage of axle inner ring.

Description

Technical Field

[0001] This utility model relates to the field of centrifuge technology, specifically to an improved bearing for a hanging bag centrifuge. Background Technology

[0002] Centrifuges are machines that use centrifugal force to separate the components in a mixture of liquids and solid particles or liquids and liquids. A hanging bag centrifuge is a closed filtration device that operates intermittently and discharges material through a hanging bag. It is widely used in the chemical, pharmaceutical, and food industries.

[0003] Existing centrifuges generally feed material into the drum from the top. Under the action of centrifugal force, the liquid phase passes through the filter medium and is discharged from the machine, while the solid phase is trapped inside the drum. After the machine stops, the fixing pins of the baffle plate and the drum are loosened, and the baffle plate and filter bag are lifted out together with a lifting tool to unload at a designated location, thus completing one work cycle.

[0004] However, during centrifuge operation, 7316AC bearings are typically used to bear the downward axial force, while N316E and N318E bearings bear the radial force. Since the three bearings lack axial positioning in the vertical upward direction, and the weight of the drum, lifting plate, and material is downward, an upward force only occurs during hoisting. Therefore, when the material is heavy, the filter bag may sink into the inner wall hole of the inner liner component, or due to worker negligence, a pin may remain attached, causing the lifting plate assembly to remain connected to the inner liner component. This results in excessive hoisting force, and the axial direction of the main shaft can only be guaranteed by the fit tolerance between the main shaft and the bearing inner ring. When the upward pulling force exceeds the frictional force of the fit tolerance between the main shaft and the bearing inner ring, the main shaft will dislodge from the inner ring, leading to bearing damage. Utility Model Content

[0005] The purpose of this invention is to provide an improved bearing for a hanging bag centrifuge to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an improved hanging bag centrifuge bearing, comprising an inner liner component and a bearing cover, wherein the bearing cover is connected to the inner liner component, and a main shaft bushing and a transmission component are respectively provided at the bottom of the bearing cover; a first bearing, a second bearing and a third bearing are respectively provided on the inner side of the main shaft bushing; a main shaft is sleeved on the inner side of the first bearing, the second bearing and the third bearing; a filter bag is provided on the inner side of the inner liner component; and a hanging plate connector and a pin are respectively provided on the top of the inner liner component.

[0007] Preferably, the bottom of the inner liner component is provided with a frame, and the frame is connected to the bearing cover.

[0008] Preferably, the first and second bearings are disposed at the bottom of the main shaft bushing, and the third bearing is disposed at the top of the main shaft bushing.

[0009] Preferably, the first bearing has a specification of 7316AC, the second bearing has a specification of N6316, and the third bearing has a specification of NJ2318E.

[0010] Preferably, there are two sets of pins, and the two pins are fixed to the hanging plate connecting parts.

[0011] Preferably, the bottom frame of the inner liner component is provided with two sets of plate frame mounting connectors, bolts, and cylindrical pins.

[0012] The improved bearing for a hanging bag centrifuge proposed in this utility model has at least the following beneficial effects:

[0013] 1. By improving the bearing structure, the upper bearing of the third bearing is changed to NJ2318E, and the lower bearing of the second bearing is changed from N316E to 6316. This gives the main shaft axial positioning, and when there is an upward force during hoisting, the main shaft transmits the force to the bearing NJ2318E. The bearing NJ2318E has unidirectional axial limiting left and right, so that the force is transmitted to the outer ring of the bearing, and then to the bearing cover, thus preventing the main shaft from coming off the inner ring and being damaged.

[0014] 2. Through the connection structure between the inner liner component and the bearing cover, the inner liner component's drum bottom assembly is equipped with a drum bottom plate connector and a drum inner sleeve flange connector, and is assembled by bolts after processing to control welding deformation. This is suitable for mass production. At the same time, the structure of two sets of plate frame mounting connectors, bolts, and cylindrical pins facilitates the disassembly of the plate frame mounting connectors, so that the structure can be replaced manually after disassembly. Attached Figure Description

[0015] Fig. 1 This is a front sectional view of the present invention;

[0016] Fig. 2 This is a partially enlarged view of the present invention;

[0017] Fig. 3 This is a schematic diagram of the centrifuge structure before the improvement of this utility model.

[0018] In the diagram: 1. Inner liner component; 2. Bearing cover; 3. Main shaft bushing; 4. Main shaft; 5. Transmission component; 6. First bearing; 7. Second bearing; 8. Third bearing; 9. Filter bag; 10. Hanging plate assembly; 11. Pin assembly. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figs. 1-3 The present invention provides an embodiment of an improved hanging bag centrifuge bearing, comprising an inner liner component 1 and a bearing cover 2. The bearing cover 2 is connected to the inner liner component 1. The bottom of the bearing cover 2 is provided with a main shaft bushing 3 and a transmission component 5. The inner side of the main shaft bushing 3 is provided with a first bearing 6, a second bearing 7 and a third bearing 8. The inner side of the first bearing 6, the second bearing 7 and the third bearing 8 is fitted with a main shaft 4. The inner side of the inner liner component 1 is provided with a filter bag 9. The top of the inner liner component 1 is provided with a hanging plate connector 10 and a pin connector 11.

[0021] Example 1, such as Figs. 1-3 As shown, the lower bearing before the improvement used 7316AC to bear the downward axial force, and N316E and N318E to bear the radial force. At this time, there was no axial positioning in the vertical upward direction of the three bearings, while the weight of the drum, the lifting plate and the material was downward. As long as there was an upward force during hoisting, the 1mm gap between the bearing cover and the inner ring of the upper bearing was used to limit the up and down sway of the bearing spindle. However, when the material was heavy, it would cause the spindle to come off the inner ring and be damaged.

[0022] The first bearing 6 has a specification of 7316AC, the second bearing 7 has a specification of N6316, and the third bearing 8 has a specification of NJ2318E. Through the improvement of the bearings, the upper bearing of the third bearing 8 adopts NJ2318E, and the lower bearing of the second bearing 7 is changed from N316E to 6316. This gives the main shaft axial positioning, and when there is an upward force during hoisting, the force is transmitted through the main shaft to the bearing NJ2318E of the third bearing 8. The bearing NJ2318E of the third bearing 8 has a unidirectional axial limit, which transmits the force to the outer ring of the bearing, and then to the bearing cover.

[0023] Example 2, as Figs. 1-2 As shown, the spin dryer requires the start-up speed from 0 to 300 r / min and the deceleration speed from 300 r / min to 0 to be completed within 17 seconds. The previous solution considered that the acceleration was too high, so a traditional inner liner was added to the outside of the drum assembly. The weight of the drum and plate frame mounting assembly itself made the overall weight too heavy, which could easily cause the motor to start and stop with excessive current, resulting in damage to the frequency converter or motor.

[0024] Before improvement: The maximum current of the 22KW motor was 89A; after improvement, the maximum current of the 18.5kW motor is 46A.

[0025] Before improvement: Drum weight 356kg + plate frame mounting assembly 114kg + batch parts 25kg = 495kg After improvement: Drum weight 116kg + plate frame mounting assembly 80kg + batch parts 25kg = 221kg. The total weight after improvement is 44.6% of the original. After improvement, the drum bottom assembly is made by separately processing the drum bottom plate assembly and the drum inner flange assembly, and then bolting them together. This controls welding deformation and is suitable for mass production.

[0026] The improved front plate frame mounting assembly is a single unit, weighing 114kg. It is installed on the drum assembly with bolts and cylindrical pins, making on-site replacement inconvenient and difficult to replace manually.

[0027] The bottom frame of the inner liner component 1 is equipped with two sets of plate frame mounting connectors, bolts, and cylindrical pins. After the improvement, the plate frame mounting connector consists of two plate frame mounting connectors and two plate frame mounting connectors, which are installed on the drum connector plate frame mounting connector one (37kg) and plate frame mounting connector two (3.2kg) by bolts and cylindrical pins. They can be disassembled and replaced manually.

[0028] In summary, this improved hanging bag centrifuge bearing achieves stable axial positioning of the main shaft structure through improvements to the bearing structure and the mounting frame fixing structure, and facilitates the disassembly of the drum assembly for easy handling and replacement.

[0029] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0030] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and 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. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0031] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

Claims

1. An improved bearing for a bag-on-wing centrifuge comprising an inner liner part (1) and a bearing cover (2), characterised in that: The bearing cover (2) is connected to the inner liner component (1). The bottom of the bearing cover (2) is provided with a main shaft bushing (3) and a transmission component (5). The inner side of the main shaft bushing (3) is provided with a first bearing (6), a second bearing (7) and a third bearing (8). The inner side of the first bearing (6), the second bearing (7) and the third bearing (8) is fitted with a main shaft (4). The inner side of the inner liner component (1) is provided with a filter bag (9). The top of the inner liner component (1) is provided with a hanging plate connector (10) and a pin connector (11). The specification of the first bearing (6) is 7316AC, the specification of the second bearing (7) is N6316, and the specification of the third bearing (8) is NJ2318E.

2. An improved bag hanger centrifuge bearing as claimed in claim 1, wherein: The bottom of the inner liner component (1) is provided with a frame, and the frame is connected to the bearing cover (2).

3. The improved hanger bag centrifuge bearing of claim 1, wherein: The first bearing (6) and the second bearing (7) are disposed at the bottom of the main shaft bushing (3), and the third bearing (8) is disposed at the top of the main shaft bushing (3).

4. The improved hanger bag centrifuge bearing of claim 1, wherein: The pins (11) are in two sets, and the two pins (11) are fixed to the hanging plate connector (10).

5. The improved hanger bag centrifuge bearing of claim 2, wherein: The inner liner component (1) has two sets of plate frame mounting connectors, bolts, and cylindrical pins on its bottom frame.

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