Labyrinth sealing structure of slewing bearing for mining machinery

Abstract

The utility model discloses a labyrinth type sealing structure of a slewing bearing for mining machinery, which belongs to the field of mechanical parts and comprises an inner ring, an outer ring and a rolling body rotatably connected between the inner ring and the outer ring, the inner ring covers the top of the outer ring, an annular bearing part is arranged at the bottom of the inner wall of the outer ring, and the inner wall of the bearing part is provided with a sealing ring. A blocking ring is arranged at the top end of the bearing part, a matching groove extending upwards is formed in the bottom wall of the inner ring, and the blocking ring is inserted into the matching groove. Therefore, when the slewing bearing is in a severe working environment, the sealing piece cannot be quickly aged or damaged, and the problems that a product is inflexible in rotation and easy to damage are effectively avoided.

Description

Technical Field

[0001] The utility model relates to the field of mechanical parts, in particular to a labyrinth seal structure of a slewing bearing for mining machinery. Background Art

[0002] Slewing bearing is a new type of mechanical component, also known as turntable bearing. It is a large bearing that can withstand comprehensive loads. It is particularly suitable for machinery that needs to make relative rotational motion between two objects and withstand axial force, radial force, and tipping moment at the same time. It is widely used in many industries such as ship equipment, construction machinery, light industrial machinery, metallurgical machinery, medical machinery, and industrial machinery.

[0003] There will be a sealed seal at the connection between the outer ring and the inner ring. The seal plays a vital role in the slewing bearing. It is mainly used to retain lubricants and protect the bearing from contamination by dust and small particles, which helps to ensure the normal operation of the bearing and extend its service life.

[0004] However, when the slewing bearing is exposed to high temperature, high pressure and high speed operation, the aging of the seal will be accelerated, resulting in the bearing being inflexible due to rapid aging or damage of the seal, which may cause damage to the product in severe cases. Utility Model Content

[0005] The utility model aims to provide a labyrinth seal structure for a slewing bearing of a mining machinery, which effectively solves the problem of inflexible rotation and easy damage of the product caused by rapid aging or damage of the slewing bearing seal in a harsh working environment.

[0006] The technical solution of the utility model is as follows:

[0007] A labyrinth seal structure for a slewing bearing for mining machinery comprises an inner ring and an outer ring, a rolling body rotatably connected between the inner ring and the outer ring, the inner ring covers the top of the outer ring, an annular bearing portion is provided at the bottom of the inner wall of the outer ring, a blocking ring is provided at the top of the bearing portion, a matching groove extending upward is provided on the bottom wall of the inner ring, and the blocking ring is inserted into the matching groove.

[0008] Furthermore, a lubricating liquid channel is formed between the outer wall of the inner ring and the inner wall of the outer ring.

[0009] Furthermore, a transverse oil cup is provided on the outer ring, lubricating oil is contained in the oil cup, and an outlet of the oil cup extends into the lubricating liquid channel.

[0010] Furthermore, the blocking ring is fixedly connected to the top of the bearing portion, and the outer wall of the bearing portion and the inner wall of the matching groove are also formed with a lubricating liquid channel.

[0011] Furthermore, an extension portion extending horizontally outward is formed on the top of the outer wall of the inner ring, the extension portion is located above the top surface of the outer ring, and the extension length of the extension portion is not less than the thickness of the ring wall of the outer ring, and the end of the extension portion is provided with a downward blocking portion.

[0012] Furthermore, a connected sealing ring is provided in the lubricating fluid channel at the top of the rolling element, and the sealing ring is located at the turning connection between the outer ring and the inner ring.

[0013] The advantages of the utility model are:

[0014] 1. The utility model provides a bearing part on the inner wall of the outer ring, and a blocking ring is provided on the bearing part. The matching groove on the inner ring is located inside the blocking ring, so as to form a certain height inside the inner ring. Compared with the traditional method of adding a seal between the outer ring and the inner ring, the utility model can adopt a method of not installing a seal, and can also prevent the lubricating fluid from flowing out from between the inner ring and the outer ring, and there is no need to worry about aging, wear and replacement.

[0015] 2. The utility model eliminates the seal so that the seal no longer contacts the inner ring and the outer ring, thereby adopting a completely non-contact sealing method to greatly reduce the rotational friction and friction power loss of the support, making the rotation more flexible and free of jamming, and extending the service life.

[0016] 3. The utility model provides an extension portion on the inner ring, and the end face of the extension portion has a blocking portion. The extension portion and the blocking portion form an L-shaped structure located above the top face of the outer ring, thereby blocking the lubricating fluid channel formed between the inner ring and the outer ring, effectively preventing external foreign matter from entering the lubricating fluid channel and hindering the normal operation of the support. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a cross-sectional view of the inner wall of the overall structure of the utility model;

[0018] Figure 2 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the outer ring component of the utility model;

[0020] Figure 4 It is a schematic diagram of the structure of the inner ring component of the utility model.

[0021] Figure numerals: 1, inner ring; 2, outer ring; 3, rolling element; 1-1, load-bearing part; 4, blocking ring; 5, matching groove; 6, lubricating liquid channel; 7, oil cup; 2-1, extension part; 2-2, blocking part; 8, sealing ring. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0023] like Figures 1 to 4 As shown, the utility model provides a labyrinth seal structure of a slewing bearing for mining machinery, which includes an inner ring 1 and an outer ring 2, a rolling body 3 rotatably connected between the inner ring 1 and the outer ring 2, the inner ring 1 covers the top of the outer ring 2, and an annular bearing portion 1-1 is provided at the bottom of the inner wall of the outer ring 2, and the bearing portion 1-1 is a part of the inner ring 1 itself and extends from the bearing portion 1-1.

[0024] A blocking ring 4 is provided at the top of the bearing part 1-1, and a matching groove 5 extending upward is provided on the bottom wall of the inner ring 1. The blocking ring 4 is inserted into the matching groove 5. When the lubricating fluid is located in the lubricating fluid channel 6, it will not flow out of the lubricating fluid channel 6 due to the influence of the height of the blocking ring 4, thereby avoiding the use of seals. Compared with the traditional non-contact method, the rotational friction force and friction power loss of the support are greatly reduced, making the rotation more flexible and free of jamming, and extending the service life.

[0025] A lubricating liquid channel 6 is formed between the outer wall of the inner ring 1 and the inner wall of the outer ring 2. The lubricating liquid channel 6 can enable the inner ring 1 and the outer ring 2 to maintain their normal rotation when they rotate.

[0026] A transverse oil cup 7 is provided on the outer ring 2. Lubricating oil is contained in the oil cup 7, and the outlet of the oil cup 7 extends into the lubricating liquid channel 6. The lubricating liquid channel 6 is supplied with oil through the oil cup 7. When the slewing bearing is working, the lubricating oil will flow out of the oil cup 7.

[0027] The blocking ring 4 is fixedly connected to the top of the bearing portion 1 - 1 , and the outer wall of the bearing portion 1 - 1 and the inner wall of the matching groove 5 are also formed with a lubricating liquid channel 6 .

[0028] An extension portion 2-1 extending horizontally outward is formed at the top of the outer wall of the inner ring 1. The extension portion 2-1 is located above the top surface of the outer ring 2, and the extension length of the extension portion 2-1 is not less than the thickness of the ring wall of the outer ring 2. A downward blocking portion 2-2 is provided at the end of the extension portion 2-1. The extension portion 2-1 and the blocking portion 2-2 are fixed as one. The vertical cross-section formed by the connecting portion and the blocking portion 2-2 is L-shaped, so that the top of the outer ring 2 can be covered and the lubricating liquid channel 6 at the outlet can be covered, thereby effectively preventing foreign matter and other impurities from entering the lubricating liquid channel 6.

[0029] A sealing ring 8 is connected to the lubricating liquid channel 6 at the top of the rolling body 3. The sealing ring 8 is located at the turning connection between the outer ring 2 and the inner ring 1. The sealing ring 8 can block impurities and other substances on the one hand, and can also effectively prevent the lubricating oil from overflowing from the top.

[0030] Detailed usage and effects of the above embodiments:

[0031] Under normal conditions, there are rolling bodies 3 connected between the inner ring 1 and the outer ring 2. Under the connection of the rolling bodies 3, the inner ring 1 and the outer ring 2 are movably connected, and the two can rotate with each other. During the rotation, the lubricating oil stored in the oil cup 7 enters the lubricating liquid channel 6, thereby lubricating the rolling body 3. A blocking ring 4 is provided on the bearing portion 1-1 on the outer ring 2. After the outer ring 2 and the inner ring 1 are matched, the blocking ring 4 is located in the matching groove 5 of the inner ring 1, thereby avoiding the situation of setting a seal between the traditional inner ring 1 and the outer ring 2. The use of a seal-free method greatly reduces the rotational friction and friction power loss of the support, makes the rotation more flexible and free of jamming, and extends the service life.

[0032] Furthermore, an extension portion 2-1 and a blocking portion 2-2 are provided at the top of the inner ring 1. The blocking portion 2-2 extends to block the outlet of the lubricating liquid channel 6, thereby blocking foreign matter, and the sealing ring 8 arranged inside can effectively prevent the lubricating oil from overflowing.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A labyrinth seal structure for a slewing bearing of a mining machine, comprising an inner ring (1) and an outer ring (2), a rolling body (3) rotatably connected between the inner ring (1) and the outer ring (2), characterized in that: The inner ring (1) covers the top of the outer ring (2); the bottom of the inner wall of the outer ring (2) is provided with an annular bearing portion (1-1); the top of the bearing portion (1-1) is provided with a blocking ring (4); the bottom wall of the inner ring (1) is provided with a matching groove (5) extending upward, and the blocking ring (4) is inserted into the matching groove (5).

2. The labyrinth seal structure of the slewing bearing for mining machinery according to claim 1, characterized in that: A lubricating liquid channel (6) is formed between the outer wall of the inner ring (1) and the inner wall of the outer ring (2).

3. The labyrinth seal structure of the slewing bearing for mining machinery according to claim 2, characterized in that: A transverse oil cup (7) is provided on the outer ring (2), lubricating oil is contained in the oil cup (7), and an outlet of the oil cup (7) extends into the lubricating liquid channel (6).

4. The labyrinth seal structure of the slewing bearing for mining machinery according to claim 2, characterized in that: The blocking ring (4) is fixedly connected to the top of the bearing portion (1-1), and the outer wall of the bearing portion (1-1) and the inner wall of the matching groove (5) are also formed with a lubricating liquid channel (6).

5. The labyrinth seal structure of the slewing bearing for mining machinery according to claim 1, characterized in that: An extension portion (2-1) extending horizontally outward is formed at the top of the outer wall of the inner ring (1); the extension portion (2-1) is located above the top surface of the outer ring (2); and the extension length of the extension portion (2-1) is not less than the thickness of the ring wall of the outer ring (2); and a downward blocking portion (2-2) is provided at the end of the extension portion (2-1).

6. The labyrinth seal structure of the slewing bearing for mining machinery according to claim 1, characterized in that: A connected sealing ring (8) is provided in the lubricating liquid channel (6) at the top of the rolling body (3), and the sealing ring (8) is located at the turning connection between the outer ring (2) and the inner ring (1).

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