Bearing box structure for film evaporator

Abstract

The utility model discloses a bearing box structure for a film evaporator, which comprises a bearing seat, and two ends of the bearing seat are respectively provided with a left bearing and a right bearing. A step positioning end face is arranged in the bearing seat, outer rings of the left bearing and the right bearing are matched with the step positioning end face, and positioning installation of the left bearing and the right bearing is achieved. And a mandrel is connected in the left bearing and the right bearing. According to the bearing box structure for the film evaporator, the bearing is axially positioned, the alternating load of the mandrel is completely counteracted at the position of the bearing, and the running stability of equipment is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of thin film evaporators, in particular to a bearing box structure for thin film evaporators. Background Art

[0002] Sterile-grade thin-film evaporators must ensure a sterile environment inside. During normal operation, the equipment operates under negative pressure, while during cleaning and sterilization, the equipment operates under positive pressure. These positive and negative pressure conditions will generate alternating positive and negative axial loads on the main shaft of the equipment. In other words, there are alternating positive and negative loads within the equipment, resulting in a large alternating axial load (positive axial force and negative axial force). To resist these alternating positive and negative loads, reasonable measures must be taken to offset them. From the perspective of the entire structure, the equipment rotates at high speed and is subject to large alternating positive and negative loads. Therefore, to ensure the normal operation of the equipment and to prevent large axial movement at the shaft seal, this important task must be entrusted to the bearing box assembly to ensure the stability of the equipment.

[0003] Patent CN220523111U discloses a new bearing housing with a mandrel. By aligning a first step and a first locking nut, and a second step and a second locking nut, this design avoids the conventional step of tapping the bearing for installation. This significantly reduces damage to the bearing during installation and significantly reduces axial runout during operation. However, the mounting structure described in this patent is still overly complex, requiring high machining and assembly precision for each component, resulting in excessively high manufacturing costs. Utility Model Content

[0004] The technical problem to be solved by the utility model is: the utility model provides a bearing box structure for a thin film evaporator, which performs axial positioning on the bearing and completely offsets the alternating load of the core shaft at the bearing to ensure the stability of the equipment operation.

[0005] The technical solution adopted by this utility model to solve the technical problem is: a bearing housing structure for a thin film evaporator, comprising a bearing seat, a bearing mounted on the bearing seat, a core shaft connected to the bearing, a washer fastened to the end surface of the bearing seat, a locking nut threadedly connected to one end of the core shaft, the washer pressing against the side surface of the outer ring of the bearing, and the locking nut pressing against the side surface of the inner ring of the bearing.

[0006] Furthermore, in order to axially position the outer ring of the bearing and not interfere with the normal operation of the bearing, the inner ring portion of the washer is pressed against the outer ring of the bearing.

[0007] Furthermore, in order to ensure that the installation position of the washer is stable, the middle part of the washer is tightened on the side surface of the bearing seat by screws.

[0008] Furthermore, in order to axially position the outer ring of the bearing while ensuring synchronous rotation of the locking nut and the inner ring, the front end of the locking nut has a clamping end face with a reduced diameter, and the clamping end face is pressed on the inner ring of the bearing.

[0009] Furthermore, in order to prevent the locking nut from loosening, a locking groove is provided on the locking nut, and a limiting screw passing through the locking groove is installed in the axial direction of the locking nut.

[0010] Furthermore, in order to reserve space for adjusting the bearing box and facilitate installation and disassembly, a left bearing and a right bearing are respectively installed at both ends of the bearing seat, and the washer and the locking nut press the left bearing or the right bearing.

[0011] Furthermore, in order to assemble the left bearing and the right bearing, a step positioning end surface is provided in the bearing seat, and the outer rings of the left bearing and the right bearing cooperate with the step positioning end surface.

[0012] Furthermore, in order to offset the alternating load of the core shaft and thus ensure the stability of the equipment operation, the left bearing and the right bearing are angular contact ball bearings installed in pairs.

[0013] Furthermore, in order to facilitate disassembly, assembly and maintenance, threaded holes are provided at both ends of the core shaft.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] The utility model is used for the bearing box structure of the thin film evaporator. The washer and the lock nut are used to limit the axial position of the bearing to avoid axial movement of the bearing. The bearing can offset the alternating load of the main shaft, thereby ensuring the stability of the equipment operation.

[0016] The utility model is used for the bearing box structure of the thin film evaporator. The bearings adopt angular contact ball bearings installed in pairs. This bearing combination can withstand radial and axial combined loads with radial load as the main load, and can also withstand pure radial load and axial load in any direction. The bearing combination installed in pairs improves the rigidity of the equipment core shaft.

[0017] The utility model is used for the bearing box structure of the thin film evaporator. The washer is axially fixed by a screw, and the locking nut is axially fixed by a limit screw, so as to ensure that the washer and the locking nut will not loosen and improve the operation stability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a schematic structural diagram of a bearing box structure for a thin film evaporator according to the present invention;

[0020] Figure 2 for Figure 1 Schematic diagram of the local structure;

[0021] Figure 3 It is a partial cross-sectional view of the mandrel;

[0022] Figure 4 It is a structural diagram of the bearing;

[0023] In the figure: 1. Bearing seat, 11. Step positioning end face, 2. Left bearing, 3. Right bearing, 4. Core shaft, 41. Threaded hole, 5. Washer, 6. Screw, 7. Locking nut, 71. Locking groove, 8. Limit screw. DETAILED DESCRIPTION

[0024] The present invention will now be described in further detail with reference to the accompanying drawings, which are simplified schematic diagrams that illustrate the basic structure of the present invention in a schematic manner.

[0025] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0026] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0027] like Figure 1 and Figure 2As shown, a bearing housing structure for a thin-film evaporator comprises a bearing seat 1 mounted on a bracket, with a left bearing 2 and a right bearing 3 mounted on either end of the bearing seat 1. The bearing seat 1 has a stepped positioning end surface 11. The outer rings of the left and right bearings 2 and 3 engage with the stepped positioning end surface 11 to position and install the left and right bearings 2 and 3. A core shaft 4 is connected to the left and right bearings 2 and 3.

[0028] like Figure 3 As shown, threaded holes 41 are provided at both ends of the core shaft 4, which facilitates disassembly, assembly and maintenance.

[0029] A washer 5 is fastened to the end face of the bearing seat 1. The middle portion of the washer 5 is screwed onto the side face of the bearing seat 1 by a screw 6, thereby axially positioning the washer 5 to prevent it from loosening.

[0030] One end of the mandrel 4 is threadedly connected to a locking nut 7. The locking nut 7 has a locking groove 71, and a limit screw 8 is installed axially of the locking nut 7 and passes through the locking groove 71. The limit screw 8 can axially position the locking nut 7 to prevent the nut from loosening, which has a good anti-loosening effect.

[0031] Washer 5 presses against the side surface of the bearing's outer ring, while locknut 7 presses against the side surface of the bearing's inner ring. The inner ring of washer 5 presses against the outer ring of left bearing 2. The front end of locknut 7 has a reduced-diameter pressing end surface, which presses against the inner ring of left bearing 2. Washer 5 and locknut 7 simultaneously limit the axial position of the bearing's outer and inner rings, preventing axial movement of the bearing.

[0032] The washer 5 and the locking nut 7 can selectively tighten the left bearing 2 or the right bearing 3. Tightening the bearing on one side can meet the use requirements. At the same time, it can reserve bearing box adjustment space and facilitate installation and disassembly.

[0033] like Figure 4 As shown, the left bearing 2 and the right bearing 3 are angular contact ball bearings installed in pairs. This bearing combination can withstand combined radial and axial loads, primarily radial loads, as well as pure radial loads and axial loads in either direction. This paired bearing combination improves the rigidity of the equipment's core shaft 4. A DB paired back-to-back installation method is selected, which offers optimal rigidity and overturning moment resistance. The alternating loads on core shaft 4 are completely offset at the bearings, ensuring the stability of the equipment's operation. To prevent the grease in the bearings from overflowing into the environment, an appropriate amount of grease has been added internally, and sealing caps have been added at both ends. This ensures that there is essentially no need for grease addition or replacement during use. The grease in the sealing caps ensures proper lubrication of the bearings, preventing grease overflow, let alone spillage into a clean environment.

[0034] In summary, the utility model is used for the bearing box structure of the thin film evaporator, which performs axial positioning on the bearing and completely offsets the alternating load of the core shaft at the bearing, thereby ensuring the stability of the equipment operation.

[0035] The above description is based on the ideal embodiment of the present invention. Based on the above description, relevant personnel can make various changes and modifications without departing from the technical scope of this utility model. The technical scope of this utility model is not limited to the content of the specification and must be determined according to the scope of the claims.

Claims

1. A bearing box structure for a thin film evaporator, comprising a bearing seat (1), characterized in that: A bearing is mounted on the bearing seat (1), a core shaft (4) is connected inside the bearing, a washer (5) is fastened to the end face of the bearing seat (1), a locking nut (7) is threadedly connected to one end of the core shaft (4), the washer (5) presses the side surface of the outer ring of the bearing, and the locking nut (7) presses the side surface of the inner ring of the bearing.

2. The bearing box structure for thin film evaporator according to claim 1, characterized in that: The inner ring portion of the washer (5) is pressed tightly against the outer ring of the bearing.

3. The bearing box structure for thin film evaporator according to claim 2, characterized in that: The middle portion of the washer (5) is screwed onto the side surface of the bearing seat (1) by means of screws (6).

4. The bearing box structure for a thin film evaporator according to claim 1, characterized in that: The front end of the locking nut (7) has a compression end face with a reduced diameter, and the compression end face is compressed on the inner ring of the bearing.

5. The bearing housing structure for a thin film evaporator according to claim 4, characterized in that: The locking nut (7) is provided with a locking groove (71), and a limiting screw (8) passing through the locking groove (71) is installed in the axial direction of the locking nut (7).

6. The bearing box structure for a thin film evaporator according to any one of claims 1 to 5, characterized in that: A left bearing (2) and a right bearing (3) are respectively installed at both ends of the bearing seat (1), and the washer (5) and the locking nut (7) press the left bearing (2) or the right bearing (3).

7. The bearing housing structure for a thin film evaporator according to claim 6, characterized in that: The bearing seat (1) has a stepped positioning end surface (11) in it, and the outer rings of the left bearing (2) and the right bearing (3) are matched with the stepped positioning end surface.

8. The bearing housing structure for a thin film evaporator according to claim 7, characterized in that: The left bearing (2) and the right bearing (3) are angular contact ball bearings installed in pairs.

9. The bearing housing structure for a thin film evaporator according to claim 1, characterized in that: Threaded holes (41) are provided at both ends of the core shaft (4).

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