Combined bearing of angular contact ball bearing and cylindrical roller bearing

Abstract

The utility model discloses a combined bearing of an angular contact ball bearing and a cylindrical roller bearing, which is characterized in that a first groove group is arranged on the inner surface of an outer ring of the angular contact ball bearing, and first chamfers are arranged on two sides of the surface of the outer ring; a second groove group is formed in the surface of the inner ring of the angular contact ball bearing, and the oil inlet hole is communicated with the second groove group; the steel balls are in four-point contact with the first groove group and the second groove group; the angular contact ball bearing and the cylindrical roller bearing are sequentially arranged between the pump shaft and the bearing seat in a sleeving mode, and second chamfers are arranged on the two sides of the surface of the outer ring of the cylindrical roller bearing. The annular groove is formed by a first chamfer and a second chamfer in a contact mode, one face of the annular groove is communicated with the oil inlet hole, and the other face of the annular groove is communicated with the bearing seat oil filling hole. The utility model provides a combined bearing of an angular contact ball bearing and a cylindrical roller bearing, which solves the problems of poor lubrication, high temperature, easiness in abrasion and high maintenance cost of the existing positioning bearing.

Description

Technical Field

[0001] The utility model belongs to the technical field of bearings, in particular to a combined bearing of an angular contact ball bearing and a cylindrical roller bearing. Background Art

[0002] As large compressors are increasingly used in the fine chemical industry, bearing lubrication is the most important link in the production process. However, due to the high price of the equipment itself (1.2 million per unit) and high production continuity requirements, the positioning bearing combination currently used has poor lubrication, high temperatures, easy wear, and high maintenance costs, which seriously affects the normal operation of production.

[0003] Known, the angular contact bearing 5 structure used now is as shown in the attached Figure 4 The structure includes: outer ring 1; inner ring 2; support frame 3; steel ball 4, and no through oil inlet hole is set. In actual use, the existing angular contact bearing 5 and cylindrical roller bearing 6 are composed as shown in the attached figure. Figure 5 (The angular contact bearing 5 and the cylindrical roller bearing 6 are sequentially installed between the pump shaft 7 and the bearing seat 8, and oil is added from the bearing seat refueling hole 80). The lubricating grease enters the cylindrical roller bearing 6 from the lubrication cavity A and then enters the angular contact bearing 5. There is no grease discharge hole, resulting in too much grease accumulating in the cavity B. During operation, the temperature is too high and the heat cannot be effectively dissipated, which makes it easy for the grease to deteriorate. The deteriorated grease enters the bearing groove, which will affect the bearing temperature and cause the wear to increase, seriously affecting the service life. Utility Model Content

[0004] An object of the present invention is to solve at least the above problems and / or disadvantages and to provide at least the advantages to be described hereinafter.

[0005] To achieve these objectives and other advantages of the present invention, a combined angular contact ball bearing and cylindrical roller bearing is provided, comprising: a first groove group provided on the inner surface of the outer ring of the angular contact ball bearing; an oil inlet hole provided on the side surface of the outer ring of the angular contact ball bearing; four oil inlet holes provided in an annular array around the axis of the outer ring; the oil inlet holes communicating with the first groove group; and first chamfers on both sides of the outer ring surface of the angular contact ball bearing;

[0006] The inner ring surface of the angular contact ball bearing is provided with a second groove group;

[0007] a steel ball mounted on a support frame of the angular contact ball bearing and in four-point contact with the first groove group and the second groove group;

[0008] The angular contact ball bearing and the cylindrical roller bearing are sequentially sleeved between the pump shaft and the bearing seat, and the outer ring surface of the cylindrical roller bearing is provided with a second chamfer on both sides;

[0009] The annular groove is formed by the contact between the first chamfer and the second chamfer. One side of the annular groove is communicated with the oil inlet hole, and the other side of the annular groove is communicated with the oil filling hole of the bearing seat.

[0010] Preferably, pressure covers are provided on both sides of the angular contact ball bearing and the cylindrical roller bearing.

[0011] The utility model has at least the following beneficial effects:

[0012] By adding four sets of oil filling holes on the axis of the angular contact bearing and improving the oil filling position, the lubrication system structure is optimized, the lubrication state of the equipment is greatly improved, and the operation of heavy-load equipment is greatly improved.

[0013] Other advantages, objectives and features of the present invention will be reflected in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the cross-sectional structure of the utility model;

[0015] Figure 2 This is a cross-sectional schematic diagram of the grease flow direction of the present utility model;

[0016] Figure 3 This is a schematic diagram of the working cross-section structure of the utility model;

[0017] Figure 4 The figure is a schematic diagram of the grease flow direction of an existing angular bearing cross section;

[0018] Figure 5 It is a schematic diagram of the cross-sectional structure of the existing angular bearing and cylindrical roller bearing combination. DETAILED DESCRIPTION

[0019] The present invention will be described in further detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0020] It should be understood that terms such as “having”, “including” and “comprising” used herein do not preclude the existence or addition of one or more other elements or combinations thereof.

[0021] It should be noted that in the description of this utility model, the orientations or positional relationships indicated by terms are based on the orientations or positional relationships shown in the accompanying drawings. These are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "provided with", "sleeved / connected", "connected", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be a direct connection or an indirect connection through an intermediate medium. It can be a communication between the internal parts of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] In addition, in the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it can mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it can mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is higher in level than the second feature. When a first feature is "below," "below," or "below" a second feature, it can mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is lower in level than the second feature.

[0024] The following is a detailed description of this experimental model with reference to the accompanying drawings:

[0025] Figure 1-3 The utility model shows a combined bearing of an angular contact ball bearing and a cylindrical roller bearing, comprising:

[0026] The inner surface of the outer ring 9 of the angular contact ball bearing 13 is provided with a first groove group 901. The side surface of the outer ring 9 of the angular contact ball bearing 13 is provided with oil inlet holes 902. Four oil inlet holes 902 are provided in an annular array around the axis of the outer ring 9. The oil inlet holes 902 are connected to the first groove group 901. The outer ring 9 of the angular contact ball bearing 13 has first chamfers on both sides of its surface.

[0027] The surface of the inner ring 10 of the angular contact ball bearing 13 is provided with a second groove set 1001;

[0028] The steel ball 12 is mounted on the support frame 11 of the angular contact ball bearing 13 and is in four-point contact with the first groove group 901 and the second groove group 1001;

[0029] The angular contact ball bearing 13 and the cylindrical roller bearing 14 are sequentially sleeved between the pump shaft 15 and the bearing seat 16. The outer ring surface of the cylindrical roller bearing 14 is provided with a second chamfer on both sides.

[0030] The annular groove 17 is formed by the contact between the first chamfer and the second chamfer. One side of the annular groove 17 is connected to the oil inlet hole 902, and the other side of the annular groove 17 is connected to the oil filling hole 1601 of the bearing seat.

[0031] Working principle:

[0032] The angular contact bearing 13 is installed by installing the steel balls 12 on the first groove group 901 and the second groove group 1001 of the outer ring 9 and the inner ring 10 through the support frame 11 to form a four-point contact. The angular contact bearing 13 and the cylindrical roller bearing 14 are then assembled and installed by bolts. The angular contact bearing 13 and the cylindrical roller bearing 14 are then sequentially sleeved between the pump shaft 15 and the bearing seat 16. When the angular contact bearing 13 contacts the outer ring surfaces of the cylindrical roller bearing 14, an annular groove 17 is formed between the first chamfer and the second chamfer.

[0033] The operator introduces grease into the oil filling hole 1601 of the bearing seat, and the grease enters the annular groove 17. Since the annular groove 17 is connected to the oil inlet hole 902, the grease enters the first groove group 901, the second groove group 1001 and the steel ball 12. The excess grease enters the cavity A and cavity B (in actual use, cavities A and B are designed with oil drain ports) and flows out, ensuring that the angular contact bearing 13 and the cylindrical roller bearing 14 can be evenly exposed to the grease, avoiding the problem of grease accumulation in a single cavity, causing grease deterioration and shortening the service life of the bearings.

[0034] In the existing equipment, grease enters from cavity A and exits from cavity B. After the oil inlet hole 902 is added to the side of the outer ring 9 of the angular contact bearing 13, the grease can be discharged from both cavity A and cavity B in two radial directions. The above method effectively reduces the bearing temperature, reduces wear, and increases the bearing service life.

[0035] The steel ball 12 is in four-point contact with the first groove group 901 and the second groove group 1001, so that the oil inlet hole 902 does not come into contact with the steel ball 12, thereby avoiding damage to the steel ball 12;

[0036] Among them, the use of grease can greatly avoid the problem of seal oil leakage.

[0037] As in the above scheme, pressure covers 18 are provided on both sides of the angular contact ball bearing 13 and the cylindrical roller bearing 14, and the angular contact bearing 13 and the cylindrical roller bearing 14 are fixed and clamped by the pressure covers 18. At the same time, during the actual setting, a jacket is added inside the pressure cover 18 to achieve the purpose of heat preservation.

[0038] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the description and implementation methods. They can be fully applied to various fields suitable for the present invention. For those familiar with this field, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A combined bearing of an angular contact ball bearing and a cylindrical roller bearing, characterized in that: The inner surface of the outer ring of the angular contact ball bearing is provided with a first groove group, and the side surface of the outer ring of the angular contact ball bearing is provided with an oil inlet hole, and four oil inlet holes are provided in a circular array around the axis of the outer ring. The oil inlet holes are connected to the first groove group, and the outer ring surface of the angular contact ball bearing has first chamfers on both sides; The surface of the inner ring of the angular contact ball bearing is provided with a second groove group; a steel ball mounted on a support frame of the angular contact ball bearing and in four-point contact with the first groove group and the second groove group; The angular contact ball bearing and the cylindrical roller bearing are sequentially sleeved between the pump shaft and the bearing seat, and the outer ring surface of the cylindrical roller bearing is provided with a second chamfer on both sides; The annular groove is formed by the contact between the first chamfer and the second chamfer. One side of the annular groove is communicated with the oil inlet hole, and the other side of the annular groove is communicated with the oil filling hole of the bearing seat.

2. The combined bearing of an angular contact ball bearing and a cylindrical roller bearing according to claim 1, characterized in that: Pressure covers are provided on both sides of the angular contact ball bearing and the cylindrical roller bearing.

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