Circumferential limiting structure of ball bearing of ball bearing turbocharger
The circumferential limiting structure addresses the complexity and cost issues of ball bearing turbochargers by using symmetric notches and keyways to balance force, preventing eccentric wear and improving aerodynamic performance.
Patent Information
- Application Number
- CN202420617429.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-27
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2034-03-27
AI Technical Summary
The existing ball bearing turbocharger designs suffer from complex structures, higher costs, and eccentric wear due to single-sided force application on the outer ring, leading to uneven radial clearance and compromised aerodynamic performance.
A circumferential limiting structure with symmetrically arranged planar notches and keyways on the ball bearing and thrust plate, using flat keys to balance the force and prevent rotation, ensuring even radial clearance and improved aerodynamic performance.
The solution provides a simple, balanced force distribution, preventing eccentric wear and enhancing aerodynamic performance by evenly distributing radial clearance.
Smart Images
Figure CN222208615U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of turbochargers, and specifically discloses a circumferential limiting structure of a ball bearing of a ball bearing turbocharger. Background Art
[0002] At present, a bearing hole is opened in the bearing body of the turbocharger, and the ball bearing is installed in the bearing hole through its outer ring; a thrust plate is fixed at the end of the bearing hole, and the end face of the thrust plate blocks the end face of the outer ring of the ball bearing; the thrust plate also clamps the flat notch at the end of the outer ring of the ball bearing through a single boss extending from its body to limit the rotation of the outer ring of the ball bearing relative to the bearing body.
[0003] A protruding boss is formed on the thrust plate body, which makes the structure and manufacturing process of the thrust plate more complicated, the cost is higher, and the stacking and storage of parts are inconvenient; only a single boss is used to limit the rotation of the outer ring of the ball bearing, so that the outer ring is subjected to force on one side. In the working state, the entire outer ring of the ball bearing will be biased to one side and skewed relative to the bearing hole, causing eccentric wear of the ball bearing, and uneven radial clearance along the circumference of the supercharger shaft system and the impeller and the housing, affecting the aerodynamic performance. Summary of the invention
[0004] The utility model aims to overcome the deficiencies in the prior art and to provide a circumferential limit structure of a ball bearing of a ball bearing turbocharger which has a simple structure, balanced force, good aerodynamic performance and no eccentric wear of the ball bearing.
[0005] According to the technical solution provided by the utility model, the circumferential limiting structure of the ball bearing of the ball bearing turbocharger includes a bearing body, a ball bearing and a thrust plate, a bearing hole is opened in the bearing body, a stopper plane is provided at the right end of the bearing hole, a ball bearing is installed in the bearing hole, the right end face of the outer ring of the ball bearing contacts with the stopper plane, a thrust plate is installed in the bearing body corresponding to the left side of the ball bearing, and the right end face of the thrust plate is attached to the left end port plane of the bearing hole;
[0006] Two planar notches are provided on the outer circle of the left end portion of the outer ring of the ball bearing, and the two planar notches are centrally symmetrically arranged with the axis of the ball bearing as the center. Two keyways are provided on the right end face of the thrust plate, and the two keyways are centrally symmetrically arranged with one diameter of the right end face of the thrust plate, or the two keyways are centrally symmetrically arranged with the axis of the thrust plate as the center. A flat key is installed in each keyway, and the two flat keys are centrally symmetrically arranged with the axis of the thrust plate as the center. The right end portion of the flat key exposes the keyway, and the side of the flat key close to the axis of the thrust plate and exposed to the keyway fits with the corresponding planar notches. A avoidance groove with one side connected to the bearing hole and closed at both ends is provided on the left end port plane of the bearing hole at the corresponding flat key, and there is a gap between the avoidance groove and the flat key.
[0007] Preferably, the two keyways are symmetrically arranged with one diameter of the right end surface of the thrust plate, and one end of each keyway is an open end and the other end is a blind end, and a flat key is installed in the blind end of each keyway.
[0008] Preferably, the left end face and the right end face of the thrust plate are both planes and are arranged in parallel.
[0009] The utility model has the advantages of simple structure, balanced force, good pneumatic performance and no eccentric wear of the ball bearing. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1 It is a three-dimensional diagram of the supercharger in the utility model.
[0011] Figure 2 It is an axial cross-sectional view of the supercharger in the utility model.
[0012] Figure 3 It is a three-dimensional diagram of the ball bearing in the utility model.
[0013] Figure 4 It is a left view of the bearing body in the utility model. DETAILED DESCRIPTION
[0014] The utility model is further described below in conjunction with specific embodiments.
[0015] A circumferential limit structure of a ball bearing of a ball bearing turbocharger, such as Figure 1 and Figure 2 As shown, it includes a bearing body 1, a ball bearing 2 and a thrust plate 3. A bearing hole 1.1 is opened in the bearing body 1. A stopper plane is provided at the right end of the bearing hole 1.1. A ball bearing 2 is installed in the bearing hole 1.1. The right end face of the outer ring of the ball bearing 2 contacts the stopper plane. A thrust plate 3 is installed in the bearing body 1 corresponding to the left side of the ball bearing 2. The right end face of the thrust plate 3 is attached to the left end port plane of the bearing hole 1.1.
[0016] Two planar notches 2.1 are provided on the outer circle of the left end of the outer ring of the ball bearing 2. Figure 3As shown, two plane notches 2.1 are centrally symmetrically arranged with the axis of the ball bearing 2 as the center, two keyways 3.1 are opened on the right end face of the thrust plate 3, and the two keyways 3.1 are centrally symmetrically arranged with one diameter of the right end face of the thrust plate 3, or the two keyways 3.1 are centrally symmetrically arranged with the axis of the thrust plate 3 as the center, a flat key 4 is installed in each keyway 3.1, and the two flat keys 4 are centrally symmetrically arranged with the axis of the thrust plate 3 as the center, the right end part of the flat key 4 exposes the keyway 3.1, and the side of the flat key 4 close to the axis of the thrust plate 3 and exposed to the keyway 3.1 is fitted with the corresponding plane notch 2.1 to limit the rotation of the outer ring of the ball bearing 2 relative to the bearing body 1, and the left end port plane of the bearing hole 1.1 is opened at the corresponding flat key 4 with an avoidance groove 1.2 connected to the bearing hole 1.1 on one side and closed at both ends, as shown Figure 4 As shown, there is a gap between the avoidance groove 1.2 and the flat key 4 to accommodate the flat key 4.
[0017] One end of each keyway 3.1 is an open end and the other end is a blind end to facilitate the processing of the keyway 3.1. A flat key 4 is installed in the blind end of each keyway 3.1.
[0018] The left end face and the right end face of the thrust plate 3 are both plane and are arranged in parallel. The left end face and the right end face of the thrust plate 3 have no protruding structure, which facilitates the manufacture and stacking of the thrust plate 3.
[0019] The utility model adopts two flat keys 4 arranged symmetrically in the center, avoiding the problem of the ball bearing 2 swinging and unbalanced force, making the radial clearance between the impeller and the housing evenly distributed along a circle, having good aerodynamic performance and no eccentric wear of the ball bearing 2.
Claims
1. A circumferential limit structure of a ball bearing of a ball bearing turbocharger, comprising a bearing body (1), a ball bearing (2) and a thrust plate (3), wherein a bearing hole (1.1) is provided in the bearing body (1), a stopper plane is provided at the right end of the bearing hole (1.1), a ball bearing (2) is installed in the bearing hole (1.1), a right end face of an outer ring of the ball bearing (2) contacts the stopper plane, a thrust plate (3) is installed in the bearing body (1) corresponding to the left side of the ball bearing (2), and the right end face of the thrust plate (3) is attached to the left end port plane of the bearing hole (1.1); Its characteristics are: Two flat notches (2.1) are provided on the outer circle of the left end of the outer ring of the ball bearing (2), and the two flat notches (2.1) are centrally symmetrically arranged with the axis of the ball bearing (2) as the center. Two keyways (3.1) are provided on the right end surface of the thrust plate (3), and the two keyways (3.1) are centrally symmetrically arranged with one diameter of the right end surface of the thrust plate (3), or the two keyways (3.1) are centrally symmetrically arranged with the axis of the thrust plate (3) as the center, and a flat key is installed in each keyway (3.1). (4), the two flat keys (4) are centrally symmetrically arranged with the axis of the thrust plate (3) as the center, the right end portion of the flat key (4) exposes the keyway (3.1), the side of the flat key (4) close to the axis of the thrust plate (3) and exposing the keyway (3.1) is fitted with the corresponding plane notch (2.1), and the left end port plane of the bearing hole (1.1) is provided with an avoidance groove (1.2) at one side connected to the bearing hole (1.1) and closed at both ends at the corresponding flat key (4), and there is a gap between the avoidance groove (1.2) and the flat key (4).
2. The circumferential limiting structure of the ball bearing of the ball bearing turbocharger according to claim 1, Its characteristics are: The two keyways (3.1) are arranged symmetrically with respect to one diameter of the right end surface of the thrust plate (3), and one end of each keyway (3.1) is an open end and the other end is a blind end, and a flat key (4) is installed in the blind end of each keyway (3.1).
3. The circumferential limiting structure of the ball bearing of the ball bearing turbocharger according to claim 1, Its characteristics are: The left end surface and the right end surface of the thrust plate (3) are both planes and are arranged in parallel.