Split type heavy-load bearing special for variable-pitch propeller and variable-pitch propeller

Abstract

The invention relates to the technical field of variable-pitch propellers, in particular to a split type large-load bearing special for a variable-pitch propeller and the variable-pitch propeller. The split type heavy-load bearing special for the variable-pitch propeller comprises a bearing outer ring, a bearing inner ring and a ball assembly, the outer surface of the bearing outer ring is in interference fit with a propeller hub oversleeve of the variable-pitch propeller, and a ball sliding way is arranged on the inner side of the bearing outer ring; the ball assembly is installed in the ball slide way. The bearing inner ring comprises a first bearing inner ring and a second bearing inner ring, and the first bearing inner ring and the second bearing inner ring are both installed on the inner side of the ball assembly. The ball assembly is clamped by the bearing inner ring and the bearing outer ring, so that the ball assembly only performs axial rotation motion, and the combined bearing can realize the function of an angular contact ball bearing. The variable-pitch propeller is high in assembly efficiency, and meanwhile the light weight of the variable-pitch propeller is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of variable pitch propellers, and in particular to a split type heavy load bearing specially used for variable pitch propellers and a variable pitch propeller. Background Art

[0002] At present, most variable pitch propellers are composed of dozens or even hundreds of parts, especially the root of the propeller. In order to realize its variable pitch function, the root of the propeller must be equipped with a thrust bearing that bears centrifugal force and a deep groove ball bearing that bears radial force (push and pull force). In addition, the bearings need retaining rings, locking nuts and other accessories when installed, which not only increases the difficulty of assembly, but also increases the weight of the propeller, which is not conducive to achieving lightweight and reliability indicators of the propeller. Summary of the invention

[0003] The first purpose of the present invention is to provide a split large-load bearing specially used for variable-pitch propellers. The split large-load bearing specially used for variable-pitch propellers clamps the ball assembly through the bearing inner ring and the bearing outer ring, so that the ball assembly can only perform axial rotational movement. The combined bearing can realize the function of an angular contact ball bearing.

[0004] A second object of the present invention is to provide a variable pitch propeller, which has high assembly efficiency and achieves lightweight of the variable pitch propeller.

[0005] The present invention provides a split type heavy load bearing specially used for a variable pitch propeller, comprising: a bearing outer ring, a bearing inner ring and a ball assembly;

[0006] The outer surface of the bearing outer ring is interference fit with the hub sleeve of the variable pitch propeller, and a ball slide is provided on the inner side of the bearing outer ring;

[0007] The ball assembly is installed in the ball slideway;

[0008] The bearing inner ring includes a first bearing inner ring and a second bearing inner ring, and the first bearing inner ring and the second bearing inner ring are both installed on the inner side of the ball assembly.

[0009] Preferably, the ball assembly comprises a bearing ball and a ball retainer;

[0010] The bearing balls and the ball retainer are arranged crosswise.

[0011] Further preferably, the ball retainer is a circular ring structure with a certain width, and the diameter of the inner ring of the ball retainer is smaller than the diameter of the bearing ball.

[0012] Further preferably, the diameter of the outer ring of the ball retainer is smaller than the diameter of the bearing balls.

[0013] Further preferably, the bearing balls are in contact with the ball slideways.

[0014] Preferably, the first bearing inner ring and the second bearing inner ring are manufactured by stamping after integral machining.

[0015] Further preferably, a plurality of bearing balls are provided.

[0016] Further preferably, the first bearing inner ring and the second bearing inner ring are semicircular structures with the same diameter.

[0017] Further preferably, the first bearing inner ring and the second bearing inner ring are used in combination.

[0018] The present invention also provides a variable pitch propeller, comprising the above-mentioned split type large load-bearing bearing dedicated to the variable pitch propeller.

[0019] Beneficial effects:

[0020] The technical solution of the present invention is to clamp the ball assembly by the inner ring and the outer ring of the bearing, so that the ball assembly can only perform axial rotation. The combined bearing can realize the function of an angular contact ball bearing. The split-type heavy-load bearing dedicated to the variable pitch propeller is designed based on the lightweight and reliability of the variable pitch propeller. Starting from the purpose of reducing the number of parts, the characteristics and load-bearing capacity of the bearing can realize the integrated design of the propeller root, avoiding the installation of the retaining ring or retaining nut of the conventional deep groove ball bearing and thrust cylindrical bearing, which not only improves the propeller assembly efficiency, but also realizes the design purpose of lightweight and reliability of the propeller. The bearing has strong designability and can be applied to propellers of different models and even in different fields. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 It is an exploded schematic diagram of the overall structure of the present invention;

[0024] Figure 3 It is a schematic diagram of the installation of the inner ring of the bearing in the present invention;

[0025] Figure 4 It is a schematic diagram of the assembly of the ball collection and ball cage of the present invention;

[0026] Figure 5 It is a schematic diagram of the structure of the ball cage in the present invention;

[0027] Figure 6 This is a schematic diagram of the actual assembly of the bearing in the present invention.

[0028] Description of reference numerals:

[0029] 1: bearing outer ring; 2: bearing balls; 3: ball cage; 4-1: first bearing inner ring; 4-2: second bearing inner ring. DETAILED DESCRIPTION

[0030] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than 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.

[0031] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0032] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it 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 it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] like Figures 1 to 6As shown, the present invention provides a split type heavy load bearing dedicated to a variable pitch propeller, which includes: a bearing outer ring 1, a bearing inner ring and a ball assembly. The outer surface of the bearing outer ring 1 is interference fit with the hub sleeve of the variable pitch propeller, and a ball slide is provided on the inner side of the bearing outer ring 1, and the ball assembly is installed in the ball slide. The bearing inner ring includes a first bearing inner ring 4-1 and a second bearing inner ring 4-2, and the first bearing inner ring 4-1 and the second bearing inner ring 4-2 are both installed on the inner side of the ball assembly.

[0034] The technical solution of the present invention is to clamp the ball assembly by the bearing inner ring and the bearing outer ring 1, so that the ball assembly can only perform axial rotational motion, and the combined bearing can realize the function of an angular contact ball bearing. The split-type heavy-load bearing dedicated to the variable pitch propeller is designed based on the lightweight and reliability of the variable pitch propeller. Starting from the purpose of reducing the number of parts, the characteristics and load-bearing capacity of the bearing can realize the integrated design of the propeller root, avoiding the installation of the retaining ring or retaining nut of the conventional deep groove ball bearing and thrust cylindrical bearing, which not only improves the propeller assembly efficiency, but also realizes the design purpose of lightweight and reliability of the propeller. The bearing has strong designability and can be applied to propellers of different models, and can even be used in different fields.

[0035] like Figure 4 As shown, the ball assembly includes a bearing ball 2 and a ball cage 3, and the bearing ball 2 and the ball cage 3 are arranged crosswise. There are a plurality of bearing balls 2. Specifically, in this embodiment, the number and outer diameter of the bearing balls 2 are selected after design verification. The ball cage 3 and the bearing balls 2 are arranged crosswise, mainly for maintaining the gap and position between the bearing balls 2, and playing a lubricating role.

[0036] like Figure 5 As shown, the ball retainer 3 is a circular ring structure with a certain width. Figure 4 As shown, the diameter of the inner ring of the ball retainer 3 is smaller than the diameter of the bearing ball 2. The diameter of the outer ring of the ball retainer 3 is smaller than the diameter of the bearing ball 2. By providing the ball retainer 3, it is possible to prevent the bearing balls 2 from rubbing against each other and damaging the surface accuracy of the bearing balls 2, thereby increasing the service life of the bearing.

[0037] The bearing balls 2 are fitted with the ball slideway. Specifically, in this embodiment, the ball slideway is a high-precision ball slideway that can be completely fitted with the bearing balls 2, and the bearing balls 2 are arranged and placed in the ball slideway.

[0038] The first bearing inner ring 4-1 and the second bearing inner ring 4-2 are formed by stamping after integral processing. The first bearing inner ring 4-1 and the second bearing inner ring 4-2 are semicircular structures with the same diameter. The first bearing inner ring 4-1 and the second bearing inner ring 4-2 are used in combination. Specifically, in this embodiment, after the bearing inner ring is integrally processed, it is divided into two semicircles by stamping, and the two semicircles are the first bearing inner ring 4-1 and the second bearing inner ring 4-2. The two semicircles are combined to form the bearing inner ring, and the first bearing inner ring 4-1 and the second bearing inner ring 4-2 need to be used in combination.

[0039] The present invention also provides a variable pitch propeller, including a split type heavy load bearing dedicated to the variable pitch propeller. Figure 3 and Figure 5 As shown, a and b are both components in the variable pitch propeller, where a is the blade root and b is the blade. The blade root is processed in an integrated manner and provided with a groove. The first bearing inner ring 4-1 and the second bearing inner ring 4-2 can be directly installed in the blade root groove by splicing, and then the balls and the ball retainer 3 are installed, and the balls are fitted with the corresponding slideways of the bearing outer ring 1 on the propeller hub, so that the blade root and the bearing can withstand a large rotational centrifugal force. While the bearing can withstand a large centrifugal force, it can also withstand a small radial force.

[0040] The blade force is used as the design input of the bearing, and the inner and outer diameters, contact angles, and diameter and size of the bearing ball 2 are optimized to obtain a split-type heavy-load bearing for variable pitch propellers that meets the requirements. The bearing can meet the different load requirements of the propeller through detailed design and verification of the contact angle.

[0041] The overall structure of the bearing is simple and reliable, with a low failure rate. It can greatly improve the assembly efficiency of the propeller and reduce the number of parts. It can also adapt to different types of propellers by changing the bearing size.

[0042] 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 replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A split type heavy load bearing specially used for variable pitch propellers, characterized in that: include: Bearing outer ring, bearing inner ring and ball assembly; The outer surface of the bearing outer ring is interference fit with the hub sleeve of the variable pitch propeller, and a ball slide is provided on the inner side of the bearing outer ring; The ball assembly is installed in the ball slideway; The bearing inner ring includes a first bearing inner ring and a second bearing inner ring, and the first bearing inner ring and the second bearing inner ring are both installed on the inner side of the ball assembly.

2. The split type heavy load bearing specially used for variable pitch propeller according to claim 1, characterized in that: The ball assembly includes a bearing ball and a ball retainer; The bearing balls and the ball retainer are arranged crosswise.

3. The split type heavy load bearing dedicated to a variable pitch propeller according to claim 2, characterized in that: The ball retainer is a circular ring structure with a certain width, and the diameter of the inner ring of the ball retainer is smaller than the diameter of the bearing ball.

4. The split type heavy load bearing specially used for variable pitch propeller according to claim 3, characterized in that: The diameter of the outer ring of the ball retainer is smaller than the diameter of the bearing balls.

5. The split type heavy load bearing specially used for variable pitch propeller according to claim 2, characterized in that: The bearing balls are fitted with the ball slideways.

6. The split type heavy load bearing dedicated to a variable pitch propeller according to claim 1, characterized in that: The first bearing inner ring and the second bearing inner ring are formed by stamping after integral machining.

7. The split type heavy load bearing dedicated to a variable pitch propeller according to claim 2, characterized in that: A plurality of bearing balls are provided.

8. The split type heavy load bearing dedicated to a variable pitch propeller according to claim 6, characterized in that: The first bearing inner ring and the second bearing inner ring are semicircular structures with the same diameter.

9. The split type heavy load bearing specially used for variable pitch propeller according to claim 8, characterized in that: The first bearing inner ring is used in combination with the second bearing inner ring.

10. A variable pitch propeller, characterized in that: It comprises a split type heavy load bearing specially used for a variable pitch propeller as described in any one of claims 1 to 9.

Images