Semi-floating oil film bearing with special-shaped groove in inner hole

Abstract

The semi-floating oil film bearing comprises a bearing body, shaft end cavities are formed in the two ends of the bearing body, a plurality of oil holes are evenly distributed in the shaft end cavities, and oil grooves are formed in the centers of the bottoms of the oil holes; a main cavity is formed in the bearing body, and the two shaft end cavities are formed in the two ends of the main cavity correspondingly. First circular truncated cone grooves are formed in the two ends of the main cavity correspondingly, the two shaft end cavities are connected into the two first circular truncated cone grooves in a communicating mode correspondingly, and second circular truncated cone grooves are formed in the other ends of the shaft end cavities. One end of the oil groove is communicated and connected into the first circular truncated cone groove, and the other end of the oil groove is communicated and connected into the second circular truncated cone groove; the number of the oil holes is 4-8. The oil groove is additionally formed in the bottom of the oil hole, the flow of lubricating oil can be increased, the flowability of the lubricating oil is improved, an oil film between the shaft outer diameter and the shaft end cavity can be formed in time, and therefore the shaft outer diameter and the shaft end cavity are prevented from being directly contacted and abraded.

Description

Technical Field

[0001] The utility model relates to the technical field of bearings, in particular to a semi-floating oil film bearing with a special-shaped groove in an inner hole. Background Art

[0002] The clearance between the rotor shaft and the floating bearing hole of a traditional supercharger is between 0.01 and 0.035 mm. Conventional lubricants require a clearance of 0.01 to 0.02 mm at room temperature to form a normal working oil film between the shaft outer diameter and the floating bearing. When the ambient temperature is room temperature or the lubricant has been used for a long time, the fluidity of the lubricant deteriorates, preventing the oil film from forming properly on the shaft outer diameter. This results in prolonged direct contact between the shaft outer diameter and the floating bearing hole, leading to rapid failure of the supercharger at high speeds. Therefore, a semi-floating oil film bearing with a special-shaped groove in the inner hole is proposed to address the problem of insufficient lubricant fluidity. Utility Model Content

[0003] The purpose of the utility model is to provide a semi-floating oil film bearing with a special-shaped groove in the inner hole, so as to solve the problems raised in the above background technology.

[0004] In order to solve the above technical problems, the utility model provides the following technical solutions: a semi-floating oil film bearing with a special-shaped groove in the inner hole, comprising a bearing body, both ends of the bearing body are provided with an axial end cavity, a plurality of oil holes are distributed in the axial end cavity, and an oil groove is provided at the center position of the bottom of the oil hole.

[0005] Preferably, a main cavity is provided in the bearing body, and two shaft end cavities are respectively provided at two ends of the main cavity.

[0006] Preferably, both ends of the main cavity are provided with a first truncated cone groove, and the two shaft end cavities are respectively connected to the two first truncated cone grooves, and the other end of the shaft end cavity is provided with a second truncated cone groove.

[0007] Preferably, one end of the oil groove is conductively connected to the first truncated cone groove, and the other end is conductively connected to the second truncated cone groove.

[0008] Preferably, the number of the oil holes is 4-8.

[0009] Preferably, the angle of the oil groove is 60-120 degrees, and the depth of the oil groove is 0.1-0.5 mm.

[0010] The utility model provides a semi-floating oil film bearing with a special-shaped groove in the inner hole, which has the advantages that: the utility model can increase the flow rate of lubricating oil and improve the fluidity of lubricating oil by adding an oil groove at the bottom of the oil hole, so that the oil film between the outer diameter of the shaft and the shaft end cavity can be formed in time, thereby avoiding direct contact and wear between the outer diameter of the shaft and the shaft end cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0012] Figure 1 This is a schematic diagram of the overall main cutaway structure of the present invention;

[0013] Figure 2 This is a schematic diagram of the overall side cutaway structure of the present invention;

[0014] Figure 3 This is a schematic diagram of the three-dimensional cross-section structure of the shaft end cavity of the present utility model.

[0015] In the figure: 1, bearing body; 11, main cavity; 12, first truncated cone groove; 13, shaft end cavity; 14, oil hole; 15, oil groove; 16, second truncated cone groove. DETAILED DESCRIPTION

[0016] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] Please see the attached Figure 1 -Attached Figure 3, the utility model provides an embodiment: a semi-floating oil film bearing with a special-shaped groove in the inner hole, including a bearing body 1, an axial end cavity 13 is opened at both ends of the bearing body 1, a plurality of oil holes 14 are evenly distributed in the axial end cavity 13, an oil groove 15 is opened at the center position of the bottom of the oil hole 14, the oil hole 14 is used to inject lubricating oil, and the oil groove 15 is used to increase the fluidity of the lubricating oil so that the oil film can be formed in time, a main cavity 11 is opened in the bearing body 1, and two axial end cavities 13 are respectively arranged at the two ends of the main cavity 11, and the main cavity 11 and the axial end cavity 13 are Used to accommodate the shaft, both ends of the main cavity 11 are provided with a first conical groove 12, and the two shaft end cavities 13 are respectively connected to the two first conical grooves 12, and the other end of the shaft end cavity 13 is provided with a second conical groove 16, the first conical groove 12 and the second conical groove 16 are both chamfered, one end of the oil groove 15 is connected to the first conical groove 12, and the other end is connected to the second conical groove 16, the number of oil holes 14 is 4-8, the angle of the oil groove 15 is 60-120 degrees, and the depth of the oil groove 15 is 0.1-0.5mm.

[0018] Working principle: When using the present invention, lubricating oil is injected through the oil hole 14 on the bearing body 1, and the oil groove 15 is used to quickly distribute the lubricating oil in the shaft end cavity 13, so as to ensure that the oil film on the outer diameter of the shaft is formed in time. The main cavity 11 and the shaft end cavity 13 are both used to accommodate the shaft, and the first frustum groove 12 and the second frustum groove 16 are both chamfered.

[0019] 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.

[0020] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, i.e., they may be located in one location or distributed across multiple network units. Some or all of the modules may be selected based on actual needs to achieve the objectives of the present embodiment. Persons of ordinary skill in the art will be able to understand and implement the present invention without inventive effort.

[0021] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A semi-floating oil film bearing with a special-shaped groove in the inner hole, comprising a bearing body (1), characterized in that: Both ends of the bearing body (1) are provided with shaft end cavities (13), a plurality of oil holes (14) are evenly distributed in the shaft end cavities (13), and an oil groove (15) is provided at the center position of the bottom of the oil hole (14).

2. A semi-floating oil film bearing with a special-shaped groove in the inner hole according to claim 1, characterized in that: A main cavity (11) is provided in the bearing body (1), and two axial end cavities (13) are respectively arranged at two ends of the main cavity (11).

3. The semi-floating oil film bearing with special-shaped grooves in the inner hole according to claim 2, characterized in that: Both ends of the main cavity (11) are provided with a first truncated cone groove (12), and the two axial end cavities (13) are respectively connected to the two first truncated cone grooves (12), and the other end of the axial end cavity (13) is provided with a second truncated cone groove (16).

4. The semi-floating oil film bearing with special-shaped grooves in the inner hole according to claim 1, characterized in that: One end of the oil groove (15) is conductively connected to the first truncated cone groove (12), and the other end is conductively connected to the second truncated cone groove (16).

5. The semi-floating oil film bearing with special-shaped grooves in the inner hole according to claim 1, characterized in that: The number of the oil holes (14) is 4-8.

6. The semi-floating oil film bearing with special-shaped grooves in the inner hole according to claim 4, characterized in that: The angle of the oil groove (15) is 60-120 degrees, and the depth of the oil groove (15) is 0.1-0.5 mm.

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