A bearing axial limiting structure for a canned pump

Abstract

The utility model discloses a bearing axial limit structure for shielding pump, including the pivot, is equipped with bearing assembly on the pivot, bearing assembly outside is equipped with the limit ring, and is fixed through the fixed ring, relate to shielding pump technical field, realize bearing limit through setting limit ring and fixed ring, save the cost, need not increase the size between the axle and increase bearing specification, and positioning accuracy is high, moreover, half ring installation is simple and easy, and the easy dismounting of later period maintenance and replacement of wearing parts.

Description

Technical Field

[0001] This utility model belongs to the field of shielded pump technology, specifically a bearing axial limiting structure for shielded pumps. Background Technology

[0002] A canned motor pump is a fully enclosed pump. It connects the pump and motor together, with the motor rotor and pump impeller fixed on the same shaft. A shielding sleeve separates the motor rotor from the stator. The rotor rotates within the pumped medium, and its power is transmitted to the rotor via the stator's magnetic field. The motor stator and rotor are isolated by a non-magnetic, corrosion-resistant thin-walled cylinder. The motor stator provides the rotating magnetic field and drives the rotor. The motor rotor and pump shaft are internally connected, eliminating the rotating shaft sealing device found in traditional centrifugal pumps, thus preventing leakage of the pumped liquid and environmental pollution. It features an integrated motor and water inlet structure and can be installed horizontally or vertically.

[0003] Traditional canned motor pump bearings typically use sliding bearings, which are usually axially restrained by shoulders or sleeves. However, extensive engineering practice has shown that such shoulder or sleeve axial restraint structures require significant axial installation space, leading to an irrational increase in shaft diameter and necessitating upgrades in bearing specifications. This not only results in material redundancy but also increases overall cost. Therefore, there is an urgent need to design a novel bearing restraint structure to address this situation. Utility Model Content

[0004] The purpose of this invention is to provide an axial limiting structure for a canned pump bearing to solve the problems mentioned in the background art.

[0005] The technical solution adopted in this utility model is as follows:

[0006] An axial limiting structure for a canned motor pump bearing includes a rotating shaft, on which a bearing assembly is provided, and a limiting ring is provided on the outer side of the bearing assembly and fixed by a retaining ring.

[0007] Preferably, the fixing ring has a fixing groove on the side near the limiting ring, and the outer end of the limiting ring is engaged in the fixing groove.

[0008] Preferably, a limiting groove is provided on the rotating shaft, and the limiting ring is engaged in the limiting groove.

[0009] Preferably, the bottom of the limiting groove adopts an arc-shaped structure, and the inner ring of the limiting ring is adapted to the bottom of the limiting groove.

[0010] Preferably, the limiting ring adopts a segmented structure, including two symmetrically arranged half-rings, which are symmetrically engaged in the limiting groove to form a circular limiting ring.

[0011] Preferably, the retaining ring is fixedly connected to the rotating shaft by a limiting screw.

[0012] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0013] In this invention, bearing positioning is achieved by setting a limiting ring and a fixing ring, which saves costs, eliminates the need to increase the inter-shaft dimensions and bearing specifications, provides high positioning accuracy, and simplifies the installation of the split ring and facilitates easy disassembly for subsequent maintenance, replacement of wear parts. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is an isometric drawing of the split ring of this utility model;

[0016] Figure 3 This is an isometric drawing of the fixed ring of this utility model;

[0017] Figure 4 This is a 3D exploded view of the present invention;

[0018] In the diagram: 1. Shaft; 2. Bearing assembly; 3. Limiting ring; 4. Fixing ring; 5. Limiting groove; 6. Split ring; 7. Limiting screw; 8. Fixing slot. Detailed Implementation

[0019] The specific embodiments of this utility model are described in detail below.

[0020] The "range" disclosed in this utility model is defined by a lower limit and an upper limit. A given range is defined by selecting a lower limit and an upper limit, which define the boundaries of a particular range. Ranges defined in this way can include or exclude endpoints and can be arbitrarily combined; that is, any lower limit can be combined with any upper limit to form a range. For example, if a range of 10–50 is listed for a specific parameter, it is also expected that ranges of 10–40 and 20–50 are also included. Furthermore, if the minimum range values ​​are listed as 1 and 2, and the maximum range values ​​are listed as 3, 4, and 5, then the following ranges are all expected: 1–3, 1–4, 1–5, 2–3, 2–4, and 2–5. In this application, unless otherwise stated, the numerical range "a–b" represents a shortened representation of any combination of real numbers between a and b, where a and b are real numbers. For example, the numerical range "0–5" means that all real numbers between "0–5" have been listed herein; "0–5" is merely a shortened representation of these numerical combinations.

[0021] Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions.

[0022] Unless otherwise specified, all technical features and optional technical features of this application may be combined to form new technical solutions.

[0023] Unless otherwise specified, all steps in this application may be performed sequentially or randomly, preferably sequentially. For example, the method includes steps (a) and (b), indicating that the method may include steps (a) and (b) performed sequentially, or it may include steps (b) and (a) performed sequentially. For example, the mention that the method may also include step (c) indicates that step (c) may be added to the method in any order. For example, the method may include steps (a), (b), and (c), or it may include steps (a), (c), and (b), or it may include steps (c), (a), and (b), etc.

[0024] Unless otherwise specified, the terms "comprising" and "including" as used in this application can be open-ended or closed-ended. For example, "comprising" and "including" can mean that other components not listed may also be included, or that only the listed components may be included.

[0025] Unless otherwise specified, the reaction will proceed under normal temperature and pressure conditions.

[0026] Unless otherwise specified, all parts or percentages are by weight or by weight percentage.

[0027] In this invention, all the substances used are known substances that can be purchased or synthesized by known methods.

[0028] In this invention, all the devices or equipment used are conventional devices or equipment known in the art and are readily available.

[0029] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0030] Example:

[0031] An axial limiting structure for a canned motor pump bearing, such as Figure 1-4 As shown, it includes a rotating shaft 1, a bearing assembly 2 on the rotating shaft 1, a limiting ring 3 on the outside of the bearing assembly 2, and is fixed by a fixing ring 4.

[0032] In one possible implementation, a fixing groove 8 is provided on the side of the fixing ring 4 near the limiting ring 3, and the outer end of the limiting ring 3 is engaged in the fixing groove 8.

[0033] In one possible implementation, a limiting groove 5 is provided on the rotating shaft 1, and a limiting ring 3 is engaged in the limiting groove 5.

[0034] In one possible implementation, the bottom of the limiting groove 5 adopts an arc-shaped structure, and the inner ring of the limiting ring 3 is adapted to the bottom of the limiting groove 5.

[0035] In one possible implementation, the limiting ring 3 adopts a segmented structure, including two symmetrically arranged half-rings 6, which are symmetrically engaged in the limiting groove 5 to form a circular limiting ring 3.

[0036] In one possible implementation, the retaining ring 4 is fixedly connected to the rotating shaft 1 by a limiting screw 7.

[0037] In one possible implementation, a groove is cut into the shaft 1, and the groove depth and width must match the inner diameter and axial width of the split ring 6, respectively. After the retaining ring 4 is installed on the shaft 1 according to the positioning dimensions, the split ring 6 is pressed into the grooved position from both sides of the shaft; then the retaining ring 4 is assembled so that its inner hole and the outer diameter of the split ring 6 form a radial constraint; finally, the limiting screw 7 is tightened into the threaded hole of the retaining ring 4 to achieve synchronous locking of the retaining ring 4 and the shaft 1.

[0038] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An axial limiting structure for a bearing in a canned motor pump, characterized in that: Includes a rotating shaft (1), on which a bearing assembly (2) is provided, and a limiting ring (3) is provided on the outside of the bearing assembly (2) and fixed by a fixing ring (4); The fixing ring (4) has a fixing groove (8) on the side near the limiting ring (3), and the outer end of the limiting ring (3) is locked in the fixing groove (8); A limiting groove (5) is provided on the rotating shaft (1), and the limiting ring (3) is engaged in the limiting groove (5); The bottom of the limiting groove (5) adopts an arc-shaped structure, and the inner ring of the limiting ring (3) is adapted to the bottom of the limiting groove (5).

2. The axial limiting structure for a canned pump bearing as described in claim 1, characterized in that: The limiting ring (3) adopts a split structure, including two symmetrically arranged half rings (6). The two half rings (6) are symmetrically locked in the limiting groove (5) to form a circular limiting ring (3).

3. The axial limiting structure for a canned pump bearing as described in claim 1, characterized in that: The fixing ring (4) is fixedly connected to the rotating shaft (1) by the limiting screw (7).

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