Labyrinth seal structure for non-road mechanical rigid axle

Abstract

A labyrinth seal structure for a non-road mechanical rigid axle belongs to the field of mechanical seal, and comprises a labyrinth seal element of a core component, which is positioned between a hub and a hub reduction support shaft. The labyrinth sealing piece is installed on the hub speed reduction supporting shaft, and when equipment works, the labyrinth sealing piece is connected to the end of the hub in a close-range embedded mode, located at the external extending position of the peripheral structure of the main combined oil seal and externally installed at the root of a large step of the hub speed reduction supporting shaft at the same time, and plays an important role in the whole sealing structure. The rigid axle sealing structure meets the strict sealing requirement of a rigid axle under the severe working condition, the labyrinth sealing piece can effectively prevent invasion of substance particles such as soil, sand, impurities in soil and the like in the working environment, the possibility that parts in the sealing structure are abraded and damaged is reduced, the service life of the sealing structure is prolonged, and the service life of the sealing structure is prolonged. And the working efficiency is effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to mechanical seal technical field relates to a sealing structure especially relates to a kind of labyrinth seal structure for non-road machinery rigid axle. BACKGROUND

[0002] In the non-road machinery products such as agricultural machinery, engineering machinery, mining machinery and transport machinery in China, rigid axle is widely used. In the actual use process of rigid axle, the sealing effect of axle is a problem that must be paid attention to. Due to the relatively poor working environment and working conditions of these vehicle products, the sealing performance of the axle main oil seal is facing great challenges, and the early damage of the sealing structure and the reduction or failure of the sealing effect have a serious impact on the use of the main machine. The single main oil seal sealing mode in the prior art is difficult to meet the strict requirements of rigid axle on sealing under complex working environment and working conditions, and the particles of substances such as soil, dust and sundries in soil in working environment are extremely easy to invade, which leads to accelerated wear and damage of the internal parts of the sealing structure, thereby reducing the service life of the main machine.

[0003] The utility model discloses a kind of labyrinth seal mechanism, and the announcement number is CN204828679U, the application date is August 19, 2015. The utility model discloses a kind of labyrinth seal structure, including: the circular ring protruding sealing sheet of being set on rotating shaft and the circular ring protruding metal sealing sheet of being set on the inner wall of shaft hole, by the cross arrangement of two, realize the sealing structure of labyrinth, add sealing grease between the gap of protruding sealing sheet, and there is no contact between protruding sealing sheet, reduce the friction resistance. The sealing ring effect of this using laminated is relatively good compared with the sealing ring effect of single piece, and it is acceptable to be used in the sealing of general mechanical transmission, but it is obviously not adaptable for the application in harsh environment. Therefore, it is imminent to develop a kind of sealing structure of rigid axle for vehicle in harsh environment. UTILITY MODEL CONTENTS

[0004] The utility model discloses a kind of compact structure, safe and reliable, and the purpose of the utility model is to provide a kind of sealing structure for rigid axle of non-road machinery in harsh environment.

[0005] The utility model discloses can reach above-mentioned goal through following technical scheme: a kind of labyrinth seal structure for non-road machinery rigid axle, comprising: gear ring, gear ring support, first tapered roller bearing, second tapered roller bearing, first bolt, planet carrier, first O ring, wheel hub, first hole elastic baffle, main combined oil seal, second hole elastic baffle, labyrinth seal, wheel edge reduction support shaft, second bolt, second O ring, axle housing;Gear ring is sleeved on gear ring support, gear ring support is installed on the outside of wheel edge reduction support shaft using spline, first tapered roller bearing is installed between gear ring support and wheel hub, second tapered roller bearing is installed between wheel hub and wheel edge reduction support shaft, planet carrier is connected with wheel hub by first bolt, main combined oil seal is installed between first hole elastic baffle and second hole elastic baffle, labyrinth seal is installed between wheel hub and wheel edge reduction support shaft, wheel edge reduction support shaft is stably connected with axle housing by second bolt.

[0006] First O ring is installed between the planet carrier and the wheel hub.

[0007] The first bolt connected between the planet carrier and the wheel hub is not less than eight.

[0008] The labyrinth seal is connected on the wheel edge reduction support shaft.

[0009] Second O ring is installed between the wheel edge reduction support shaft and the axle housing.

[0010] The second bolt connected between the wheel edge reduction support shaft and the axle housing is not less than ten.

[0011] The utility model discloses can reach following technical effect after adopting above-mentioned technical scheme: the utility model discloses compact structure, safe and reliable, meet the rigid axle under harsh working condition to the strict requirement of sealing, prevent the invasion of soil, ash, soil in working environment, reduce the possibility of sealing structure internal component wear and damage, thereby improve the service life of main machine, effectively improve work efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is main view cross section structure schematic diagram of the utility model discloses a kind of labyrinth seal structure for non-road machinery rigid axle;

[0013] Figure 2 It is labyrinth seal structure schematic diagram of the utility model discloses a kind of labyrinth seal structure for non-road machinery rigid axle;

[0014] Figure 3 It is Figure 2 Partial structure schematic diagram of top view.

[0015] In the diagram: 1. Gear ring, 2. Gear ring support, 3. First tapered roller bearing, 4. Second tapered roller bearing, 5. First bolt, 6. Planetary carrier, 7. First O-ring, 8. Hub, 9. First retaining ring, 10. Main assembly oil seal, 11. Second retaining ring, 12. Labyrinth seal, 13. Wheel-side reduction support shaft, 14. Second bolt, 15. Second O-ring, 16. Axle housing. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments. For example... Figures 1-3 As shown, a labyrinth seal structure for a rigid axle of off-road machinery includes: a gear ring 1, a gear ring support 2, a first tapered roller bearing 3, a second tapered roller bearing 4, a first bolt 5, a planetary carrier 6, a first O-ring 7, a wheel hub 8, a first retaining ring for the first bore 9, a main combination oil seal 10, a second retaining ring for the second bore 11, a labyrinth seal 12, a wheel-side reduction support shaft 13, a second bolt 14, a second O-ring 15, and an axle housing 16.

[0017] In this embodiment, the gear ring 1 is fitted onto the gear ring support 2, which is splined to the outside of the wheel-side reduction support shaft 13. A first tapered roller bearing 3 is assembled between the gear ring support 2 and the wheel hub 8. A second tapered roller bearing 4 is assembled between the wheel hub 8 and the wheel-side reduction support shaft 13. The planetary carrier 6 is connected to the wheel hub 8 by ten first bolts 5. Its oil sealing function is achieved by a first O-ring 7 installed between them. To ensure that internal oil does not leak at the connection between the planetary carrier 6 and the wheel hub 8, the main combination oil seal 10 is installed between the first hole elastic retaining ring 9 and the second hole elastic retaining ring 11, and close to the first hole elastic retaining ring 9. The main function of the main combination oil seal 10 is to block mud, soil, and harmful particles, dust, etc., from entering the equipment and damaging internal components.

[0018] The core component of this invention is the labyrinth seal 12, which is installed between the wheel hub 8 and the wheel-side reduction support shaft 13. The labyrinth seal 12 is securely mounted on the wheel-side reduction support shaft 13 by six bolts, and its unique labyrinth-shaped structure plays a crucial role.

[0019] During operation, the labyrinth seal 12, which is embedded at the end of the hub 8, is located at the external extension position of the peripheral structure of the main combined oil seal 10, and is also externally mounted at the root of the large step of the wheel-side reduction support shaft 13. The labyrinth seal 12 can effectively prevent particulate mud, sand, dust and other particles from approaching the main combined oil seal 10, thereby improving the real-time performance of the main combined oil seal 10.

[0020] The wheel-side reduction support shaft 13 is stably connected with the axle housing 16 through twelve second bolts 14, and a second O-ring 15 is installed between the wheel-side reduction support shaft 13 and the axle housing 16, so that the effective sealing of the internal oil is further realized, the external leakage of the internal oil is successfully blocked, and the lubricating environment in the system is ensured to be stable.

[0021] Compared with the prior art, the utility model satisfies the strict requirement of non-road machinery rigid axle in bad working condition, prevents the invasion of the substance particles such as soil, dust, sundries in soil in working environment, reduces the possibility of the wear and damage of the internal parts of the sealing structure, and improves the service life of the main machine.

[0022] It should be finally pointed out that: the above described only for the preferred embodiment of the utility model, and does not limit the whole content of the utility model, although the utility model has been described in detail with reference to the foregoing embodiment, but for the person skilled in the art, it still can make formal modification to the technical scheme recorded in the foregoing embodiment, or equivalent replacement to part of technical features. Therefore, the formal modification, equivalent replacement etc. made within the technical idea inspiration of the utility model should be contained in the right protection scope of the utility model.

Claims

1. A labyrinth seal structure for a rigid axle of a non-road machine, comprising: The gear ring (1), the gear ring support (2), the first tapered roller bearing (3), the second tapered roller bearing (4), the first bolt (5), the planet carrier (6), the first O-ring (7), the wheel hub (8), the first hole elastic retainer (9), the main combined oil seal (10), the second hole elastic retainer (11), the labyrinth seal (12), the wheel edge reduction support shaft (13), the second bolt (14), the second O-ring (15), the axle housing (16); characterized in that: the gear ring (1) is sleeved on the gear ring support (2), the gear ring support (2) is installed on the outside of the wheel edge reduction support shaft (13) by using the spline, the first tapered roller bearing (3) is installed between the gear ring support (2) and the wheel hub (8), the second tapered roller bearing (4) is installed between the wheel hub (8) and the wheel edge reduction support shaft (13), the planet carrier (6) is connected with the wheel hub (8) through the first bolt (5), the main combined oil seal (10) is installed between the first hole elastic retainer (9) and the second hole elastic retainer (11), the labyrinth seal (12) is installed between the wheel hub (8) and the wheel edge reduction support shaft (13), and the wheel edge reduction support shaft (13) is stably connected with the axle housing (16) through the second bolt (14).

2. A labyrinth seal structure for a rigid axle of a non-road machine according to claim 1, characterized in that: The first O-ring (7) is installed between the planet carrier (6) and the wheel hub (8).

3. A labyrinth seal structure for a rigid axle of a non-road machine according to claim 1, characterized in that: The first bolt (5) connected between the planet carrier (6) and the wheel hub (8) is not less than eight.

4. A labyrinth seal structure for a rigid axle of a non-road machine according to claim 1, characterized in that: The labyrinth seal (12) is connected on the wheel edge reduction support shaft (13).

5. A labyrinth seal structure for a rigid axle of a non-road machine according to claim 1, characterized in that: The second O-ring (15) is installed between the wheel edge reduction support shaft (13) and the axle housing (16).

6. A labyrinth seal structure for a rigid axle of a non-road machine according to claim 1, characterized in that: The second bolt (14) connected between the wheel edge reduction support shaft (13) and the axle housing (16) is not less than ten.

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