Novel motor bearing bush oil baffle device

Abstract

The utility model provides a novel motor bearing bush oil baffle device, which relates to the field of oil baffle rings, and comprises a shell, a plug-in ring groove is arranged in the shell, a sealing ring is arranged in the plug-in ring groove, a magnet is fixedly embedded in the end face of the sealing ring, a groove is arranged on the inner ring of the sealing ring, and the plug-in ring groove is arranged in the groove. A groove is formed in the base, flexible teeth are fixedly arranged in the groove, each flexible tooth comprises a fixing part, outer teeth extend outwards from one side of the bottom end of each fixing part, inner teeth are fixedly installed at the positions, located below the fixing parts, of the bottom ends of the outer teeth, and the outer teeth and the inner teeth jointly form a herringbone shape. According to the novel motor bearing bush oil blocking device, the inner teeth and the outer teeth are arranged on the outer sides of the flexible teeth and connected to form the herringbone cavity, so that an oil film of lubricating liquid can be stored in the cavity, the length of the oil film can be increased, and better lubrication is provided.

Description

Technical Field

[0001] The utility model relates to the technical field of oil baffle rings, in particular to a new type of oil baffle device for a motor bearing shell. Background Technique

[0002] An oil baffle ring is generally a mechanical part installed on a rotating shaft, and its main function is to prevent lubricating oil from leaking along the rotating shaft or prevent external impurities from entering the lubrication system.

[0003] At present, the oil baffle ring of the fan motor bearing shell adopts a resin material and a working mode of spring locking and sealing. There are two problems with this sealing form: 1. The resin oil baffle ring is tightly fitted with the journal for sealing, and the journal and the oil baffle ring have a relatively high-speed relative friction movement. Since the resin material is relatively hard, the journal position is often worn out with a groove about 2 mm deep and 1 mm wide. 2. This kind of sealing adopts the form of spring locking. There is a small gap between the inner end face of the oil baffle ring and the journal. And after long-term wear and the appearance of grooves, the gap further increases, so it is easy to have the problem of oil leakage due to poor sealing. Oil leakage has a great impact on the reliable operation of the motor and the civilized production on site.

[0004] The existing patent, a steam turbine elastic oil-blocking tooth type oil baffle ring (CN203202222U), includes an oil baffle combination body one and an oil baffle combination body two. Through holes are provided in the centers of both the oil baffle combination body one and the oil baffle combination body two. A cavity is provided between the oil baffle combination body one and the oil baffle combination body two, and the cavity is communicated with the through holes. A number of trapezoidal grooves are provided on the inner ring surfaces of the oil baffle combination body one and the oil baffle combination body two. U-shaped spring pieces are provided in the trapezoidal grooves, and oil-blocking teeth are provided inside the U-shaped spring pieces. An oil-blocking bevel platform is provided at the place where the cavity is communicated with the through holes. The oil baffle combination body one and the oil baffle combination body two are connected by a number of combination screws.

[0005] The steam turbine elastic oil-blocking tooth type oil baffle ring provided by this application reduces the wear of the shaft diameter, improves the sealing performance, and reduces oil leakage. However, the length of the oil film formed between the oil baffle ring provided by this application and the shaft is small, only at the edge of the oil-blocking teeth, resulting in poor lubrication effect. Content of the Utility Model

[0006] Aiming at the deficiencies of the prior art, the utility model provides a new type of oil baffle device for a motor bearing shell, which solves the problem of poor lubrication effect of the oil baffle ring on the shaft proposed in the background technique.

[0007] Technical Solution

[0008] To achieve the above object, the present utility model is realized through the following technical solutions: A new type of motor shaft bearing oil retaining device, including a housing, an insertion ring groove is provided inside the housing, a sealing ring is arranged inside the insertion ring groove, a magnet is fixedly embedded inside the end face of the sealing ring, a groove is provided inside the inner ring of the sealing ring, and a flexible tooth is fixedly arranged inside the groove. The flexible tooth includes a fixing part, an outer tooth extends outward from one side of the bottom end of the fixing part, and an inner tooth is fixedly installed below the bottom end of the outer tooth. The outer tooth and the inner tooth together form a "human" shape.

[0009] Further, a protrusion is provided on the side of the outer tooth away from the inner tooth, and a notch is provided above the protrusion on the inner tooth.

[0010] Further, a bearing groove is provided at one end of the inner ring of the housing, and a brush ring is fixedly installed inside the bearing groove.

[0011] Further, an installation groove is provided on the side of the inner ring of the housing away from the bearing groove, and a copper tooth piece is arranged inside the installation groove.

[0012] Further, the cross-sectional shape of the copper tooth piece is "U" shaped, and chamfering is performed on the two protruding ends of the copper tooth piece. The direction of the chamfer of the copper tooth piece is on the side away from the brush ring.

[0013] The beneficial effects of the present utility model are as follows:

[0014] 1. For this new type of motor shaft bearing oil retaining device, by arranging an inner tooth and an outer tooth on the outside of the flexible tooth to form a "human" shaped cavity, lubricating liquid oil film can be stored inside the cavity, thereby increasing the length of the oil film and providing better lubrication.

[0015] 2. For this new type of motor shaft bearing oil retaining device, by arranging an installation groove on the side of the inner ring of the housing away from the bearing groove, a copper tooth piece is arranged inside the installation groove, the cross-sectional shape of the copper tooth piece is "U" shaped, and chamfering is performed on the two protruding ends of the copper tooth piece. The direction of the chamfer of the copper tooth piece is on the side away from the brush ring. Through such a setting, an oil storage part can be formed at the chamfer position, providing better lubrication. Description of the Drawings

[0016] Figure 1 It is a half-sectional view of the present utility model;

[0017] Figure 2 It is a cross-sectional view of the housing of the present utility model;

[0018] Figure 3 It is a cross-sectional view of the sealing ring of the present utility model;

[0019] Figure 4 It is a cross-sectional view of the flexible tooth of the present utility model;

[0020] Figure 5 Schematic cross-sectional view of the copper tooth piece of the present utility model;

[0021] Figure 6 Schematic cross-sectional view of the brush ring of the present utility model.

[0022] Among them, 1. Outer shell; 2. Insertion ring groove; 3. Sealing ring; 4. Magnet; 5. Groove; 6. Flexible tooth; 7. Bearing groove; 8. Installation groove; 9. Copper tooth piece; 10. Brush ring; 601. Fixed part; 602. Outer tooth; 603. Inner tooth; 604. Protrusion; 605. Notch. Specific embodiments

[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0024] Refer to Figures 1-6 , a new type of oil baffle device for a motor shaft bearing, including an outer shell 1. An insertion ring groove 2 is provided inside the outer shell 1. A sealing ring 3 is arranged inside the insertion ring groove 2. A magnet 4 is fixedly embedded inside the end face of the sealing ring 3. Magnetic attraction is used for full-course positioning, showing zero gravity to the rotor and not grinding the shaft. A groove 5 is provided inside the inner ring of the sealing ring 3. A flexible tooth 6 is fixedly arranged inside the groove 5. The expansion difference is large in the high-temperature area, and the flexible tooth 6 automatically tracks and compensates. The flexible tooth 6 automatically runs within the best clearance range with the shaft, and can establish an oil film well.

[0025] The flexible tooth 6 includes a fixed part 601. One side of the bottom end of the fixed part 601 extends outward to form an outer tooth 602. An inner tooth 603 is fixedly installed below the bottom end of the outer tooth 602 and located below the fixed part 601. The outer tooth 602 and the inner tooth 603 together form a "human" shape. The cavity for temporarily storing lubricating oil is formed in the space between the inner tooth 603 and the outer tooth 602 in a "human" shape, so as to increase the contact area with the rotating shaft, and further better achieve lubrication.

[0026] A protrusion 604 is arranged on the side of the outer tooth 602 away from the inner tooth 603. A notch 605 is provided above the protrusion 604 on the inner tooth 603. Through such a setting, external lubricating oil can enter the cavity formed between the outer tooth 602 and the inner tooth 603 from the notch 605.

[0027] One end of the inner ring of the housing 1 is provided with a bearing groove 7. A brush ring 10 is fixedly installed inside the bearing groove 7. The function of the brush ring 10 is to evenly apply the lubricating fluid and at the same time prevent dust from entering. The sealing oil film formed between the brush ring 10 and the rotor shaft surface can form a completely sealed state, and the steam blocking effect is good.

[0028] On the side of the inner ring of the housing 1 away from the bearing groove 7, an installation groove 8 is provided. A copper tooth piece 9 is arranged inside the installation groove 8. The copper tooth piece 9 has a simple structure and is a traditional sealing method.

[0029] The cross-sectional shape of the copper tooth piece 9 is "U" shaped. Chamfering is performed on the two protruding ends of the copper tooth piece 9. The direction of the chamfer of the copper tooth piece 9 is on the side away from the brush ring 10. Through such a setting, an oil storage part can be formed at the chamfer position to provide better lubrication.

[0030] During use, by providing an inner tooth 603 and an outer tooth 602 on the outer side of the flexible tooth 6, a "person" shaped cavity is formed, so that an oil film of the lubricating fluid can be stored inside the cavity, thereby increasing the length of the oil film and providing better lubrication.

[0031] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations.

[0032] The above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A new type of oil baffle device for motor shaft bearings, comprising a housing (1), characterized in that: An insertion ring groove (2) is formed inside the housing (1). A sealing ring (3) is arranged inside the insertion ring groove (2). A magnet (4) is fixedly embedded inside the end face of the sealing ring (3). A groove (5) is formed inside the inner ring of the sealing ring (3). A flexible tooth (6) is fixedly arranged inside the groove (5). The flexible tooth (6) includes a fixing part (601). An external tooth (602) extends outward from one side of the bottom end of the fixing part (601). An internal tooth (603) is fixedly installed below the bottom end of the external tooth (602) and below the fixing part (601). The external tooth (602) and the internal tooth (603) together form a "human" shape.

2. The novel motor bearing oil baffle device according to claim 1, characterized in that: A protrusion (604) is arranged on the side of the external tooth (602) away from the internal tooth (603). A notch (605) is formed above the protrusion (604) on the internal tooth (603).

3. The novel motor bearing oil baffle device according to claim 2, wherein: A bearing groove (7) is formed at one end of the inner ring of the housing (1). A brush ring (10) is fixedly installed inside the bearing groove (7).

4. A novel oil baffle device for a motor shaft bearing according to claim 3, characterized in that: An installation groove (8) is formed on the side of the inner ring of the housing (1) away from the bearing groove (7). A copper tooth piece (9) is arranged inside the installation groove (8).

5. A novel motor bearing oil baffle device according to claim 4, characterized in that: The cross-sectional shape of the copper tooth piece (9) is "U" shaped. Chamfering is performed on the two protruding ends of the copper tooth piece (9). The direction of the chamfer of the copper tooth piece (9) is on the side away from the brush ring (10).

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