Amphibious vehicle side reduction gear output shaft seal system

Abstract

This invention provides a sealing system for the output shaft of an amphibious vehicle side reducer, comprising a primary sealing assembly, a secondary sealing assembly, a tertiary sealing assembly, and a pressure relief and drainage assembly. A labyrinth seal formed by the oil baffle ring and oil seal seat filters and blocks large abrasive particles, increasing the sealing path and thus extending the intrusion time of impurities. A felt ring further seals the system, filtering out fine abrasive particles from the impurities. Multiple oil seals work together to seal against seawater and powdery sludge. When seawater and sludge reach the cavity outside the multiple oil seals through the primary and secondary seals, a one-way valve opens when the pressure inside the cavity reaches a preset value. At this point, the seawater and sludge can be discharged through the drain hole, reducing the risk of seal failure due to pressure and wear. Through this multi-stage sealing and pressure relief design, seawater and flowing sludge in the seawater can be effectively prevented from entering the side reducer cavity, thus preventing damage to the side reducer.

Description

Technical Field

[0001] This utility model relates to the field of side reducer sealing technology, specifically to a sealing system for the output shaft of an amphibious vehicle side reducer. Background Technology

[0002] Amphibious vehicles, also known as amphibious vehicles, are vehicles that, through special structural designs (such as sealed bodies and amphibious propulsion systems), can move on land using wheels or tracks, and can also float and move forward on water.

[0003] In amphibious vehicles, side reducers are installed on both sides of the front of the vehicle. Since their power output is given to the drive wheels, the output end of the driven shaft connected to the drive wheels must have a sealing device to seal the side reducer housing. However, most existing output shaft sealing devices have poor sealing performance. During use, seawater and sediment flowing in the seawater can easily enter the inner cavity of the side reducer, causing the lubricating oil to emulsify and deteriorate, ultimately leading to damage to the side reducer. Therefore, to address the above technical problems, a sealing system for the output shaft of the amphibious vehicle side reducer is proposed. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model proposes a sealing system for the output shaft of the amphibious vehicle's side reducer, which can effectively prevent seawater and flowing mud and sand in the seawater from entering the inner cavity of the side reducer and prevent damage to the side reducer.

[0005] A sealing system for the output shaft of a side reducer in an amphibious vehicle, comprising:

[0006] The primary sealing assembly includes an oil retainer ring and an oil seal seat. The oil retainer ring is mounted on the output shaft via a flange, and the oil seal seat is mounted on the reducer housing via a bearing seat. The opposite ends of the oil retainer ring and the oil seal seat cooperate to form a labyrinth seal.

[0007] The secondary sealing assembly includes a felt ring, which is sealed at the opposite ends of the oil baffle ring and the oil seal seat, and is located inside the labyrinth seal;

[0008] A three-stage sealing assembly includes oil seals, which are installed between the outer circumference of the flange shoulder and the inner circumference of the oil seal seat, and are arranged in three sets at axial intervals. The lips of the two sets of oil seals closest to the flange face the flange, and the lip of the other set of oil seals faces the inner cavity of the reducer housing; and

[0009] The pressure relief and drainage assembly includes a one-way valve. The oil seal seat, the bearing seat, and the reducer housing are all provided with a common drain hole. One end of the drain hole is connected to the cavity between the felt ring and the oil seal, and the other end is connected to the outside of the reducer housing. The one-way valve is disposed inside the drain hole.

[0010] The beneficial effects of the above-mentioned amphibious vehicle side reducer output shaft sealing system are as follows:

[0011] The labyrinth seal formed by the oil retainer ring and oil seal seat can filter and block large abrasive particles, increasing the sealing path and thus increasing the intrusion time of impurities. The felt ring further seals the impurities, filtering out fine abrasive particles. Multiple sets of oil seals work together to seal against seawater and powdery sludge. When seawater and silt reach the cavity outside the multiple sets of oil seals through the primary and secondary seals, the one-way valve opens when the pressure inside the cavity reaches a preset value. At this time, the seawater and silt in the cavity can be discharged through the drain hole, reducing the risk of seal failure due to pressure and wear. Through the above multi-stage sealing and pressure relief drainage design, seawater and silt flowing in the seawater can be effectively prevented from entering the inner cavity of the side reducer, preventing damage to the side reducer.

[0012] In one embodiment, the oil baffle ring and the oil seal seat are provided with recesses at their opposite ends, and the two sets of recesses are staggered and interlocked to form the labyrinth seal.

[0013] In one embodiment, the oil seal seat has a fixing ring groove at the end facing the oil baffle ring, one end of the felt ring is sealed and embedded in the fixing ring groove, and the other end face is sealed and fitted with the oil baffle ring.

[0014] In one embodiment, the lips of both sets of oil seals near the flange are provided with spiral reflux grooves.

[0015] In one embodiment, the flange is provided with two sets of oil injection holes symmetrically. One end of the two sets of oil injection holes is connected to the outside, and the other end is connected through the gap between multiple sets of oil seals.

[0016] In one embodiment, the outer peripheral surface of the flange shoulder is provided with a corrosion-resistant and wear-resistant coating.

[0017] In one embodiment, the corrosion-resistant and wear-resistant coating comprises an inner and outer base layer, a transition layer, and a functional layer. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of this utility model, the accompanying drawings used in the specific embodiments will be briefly described below. In all the drawings, the elements or parts are not necessarily drawn to scale.

[0019] Figure 1 This is a cross-sectional view of the sealing system for the output shaft of the side reducer of an amphibious vehicle, provided in an embodiment of the present invention.

[0020] Figure 2 for Figure 1The diagram shows another cross-sectional view of a sealing system for the output shaft of a side reducer in an amphibious vehicle.

[0021] Figure 3 for Figure 1 The diagram shows the structure of the oil seal after cross-section in the sealing system of the output shaft of the amphibious vehicle's side reducer.

[0022] Figure label:

[0023] 1. Flange; 11. Oil filling hole; 2. Output shaft; 3. Bearing housing; 4. Reducer housing;

[0024] 10. Oil retaining ring; 101. Oil seal seat; 102. Recess;

[0025] 20. Felt ring;

[0026] 30. Oil seal; 301. Spiral reflux groove;

[0027] 40. Check valve; 401. Drain hole. Detailed Implementation

[0028] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0029] Please see Figure 1 One embodiment of an amphibious vehicle side reducer output shaft sealing system includes a primary sealing assembly, a secondary sealing assembly, a tertiary sealing assembly, and a pressure relief and drainage assembly.

[0030] The primary sealing assembly includes an oil retaining ring 10 and an oil seal seat 101. The oil retaining ring 10 is mounted on the output shaft 2 via a flange 1, and the oil seal seat 101 is mounted on the reducer housing 4 via a bearing seat 3. The opposite ends of the oil retaining ring 10 and the oil seal seat 101 cooperate to form a labyrinth seal. The secondary sealing assembly includes a felt ring 20, which is sealed at the opposite ends of the oil retaining ring 10 and the oil seal seat 101 and is located inside the labyrinth seal. The tertiary sealing assembly includes an oil seal 30, which is sealed on the outer periphery of the shoulder of the flange 1. Three sets of oil seals 30 are arranged axially between the inner circumference of the oil seal seat 101 and the oil seal seat 101. The lips of the two sets of oil seals 30 closest to the flange 1 face the flange 1, and the lips of the other set of oil seals 30 face the inner cavity of the reducer housing 4. The pressure relief and drainage assembly includes a one-way valve 40. The oil seal seat 101, the bearing seat 3 and the reducer housing 4 are all provided with a connecting drain hole 401. One end of the drain hole 401 is connected to the cavity between the felt ring 20 and the oil seal 30, and the other end is connected to the outside of the reducer housing 4. The one-way valve 40 is located inside the drain hole 401.

[0031] In the above embodiments, the labyrinth seal formed by the oil baffle ring 10 and the oil seal seat 101 can filter and block large abrasive particles, increase the sealing path, and thus increase the intrusion time of the impurity. The felt ring 20 further seals the impurity, filtering out fine abrasive particles. Then, multiple sets of oil seals 30 work together to seal against seawater and powdery sludge. When seawater and silt reach the cavity outside the multiple sets of oil seals 30 through the primary and secondary seals, the one-way valve 40 opens when the pressure inside the cavity reaches a preset value. At this time, the seawater and silt in the cavity can be discharged through the drain hole 401, reducing the risk of seal failure due to pressure and wear of the oil seal 30. Through the above multi-stage sealing and pressure relief drainage design, seawater and silt flowing in the seawater can be effectively prevented from entering the inner cavity of the side reducer, preventing damage to the side reducer.

[0032] Please see Figure 2 In one embodiment, both the oil baffle ring 10 and the oil seal seat 101 have recesses 102 at their opposite ends. The two sets of recesses 102 are staggered and interlock to form a labyrinth seal. The labyrinth seal can be formed by the staggered interlocking of the two recesses 102, which is convenient and labor-saving.

[0033] Please see Figure 2 In one embodiment, the oil seal seat 101 has a fixing ring groove at the end facing the oil baffle ring 10. One end of the felt ring 20 is sealed and embedded in the fixing ring groove, and the other end face is sealed and fitted with the oil baffle ring 10. By fixing the position of the felt ring 20 by opening the fixing ring groove, the sealing surface can be prevented from shifting due to axial movement of the felt ring 20.

[0034] Please see Figure 3 In one embodiment, the lips of both sets of oil seals 30 near the flange 1 are provided with spiral return grooves 301. When a small amount of seawater seeps out of the lips of the oil seals 30, the spiral return grooves 301 of the oil seals 30 allow the seeping seawater to return to the cavity under the action of shaft rotation and centrifugal force, and be discharged through the drain hole 401, thereby effectively preventing seawater from seeping into the inner cavity of the reducer housing 4 through multiple sets of oil seals 30.

[0035] Please see Figure 2 In one embodiment, two sets of oil injection holes 11 are symmetrically provided on the flange 1. One end of each set of oil injection holes 11 is connected to the outside, and the other end is connected through the gap between multiple sets of oil seals 30. By setting two sets of symmetrical oil injection holes 11, grease can be added to the lips of multiple sets of oil seals 30 periodically, ensuring that the lips of multiple sets of oil seals 30 can be properly lubricated in a timely manner, thereby improving the service life of the oil seals 30. Furthermore, by injecting grease into one oil injection hole 11 until grease overflows from the other oil injection hole 11, the amount of grease added can be visually detected.

[0036] Please see Figure 1 In one embodiment, a corrosion-resistant and wear-resistant coating is provided on the outer peripheral surface of the shoulder of flange 1. Further, the corrosion-resistant and wear-resistant coating includes an inner and outer base layer, a transition layer, and a functional layer. Specifically, the base layer is made of NiCrMo material, the transition layer is made of WC-10Co4Cr material, and the functional layer is Al2O3 / Graphene-DLC. By providing the corrosion-resistant and wear-resistant coating, the wear and corrosion of the outer peripheral surface of the shoulder of flange 1 caused by seawater and salt spray crystallization can be reduced, ensuring the sealing contact effect between the multiple sets of oil seals 30 and the outer peripheral surface of the shoulder of flange 1.

[0037] The specific implementation of the above-mentioned amphibious vehicle side reducer output shaft sealing system is as follows:

[0038] The two sets of recesses 102 on the oil baffle ring 10 and the oil seal seat 101 are staggered and interlocked to form a labyrinth seal, which can filter and block large abrasive particles, increase the sealing path, and thus increase the intrusion time of impurities. The felt ring 20 further seals the seal, filtering out fine abrasive particles in the impurities. Then, multiple sets of oil seals 30 work together to seal against seawater and powdery sludge. When a small amount of seawater seeps out of the lip of the oil seal 30, the spiral return groove 301 of the lip of the oil seal 30 allows the seeping seawater to flow along the spiral return groove 301 on the shaft. Under the action of rotation and centrifugal force, it returns to the cavity. When seawater and sediment reach the cavity outside the multiple sets of oil seals 30 through the primary and secondary seals, the one-way valve 40 opens when the pressure in the cavity reaches the preset value. At this time, the seawater and sediment in the cavity can be discharged through the drain hole 401, reducing the risk of seal failure caused by pressure and wear of the oil seal 30. Through the above-mentioned multi-stage sealing and pressure relief drainage design, seawater and sediment flowing in the seawater can be effectively prevented from entering the inner cavity of the side reducer, thus preventing damage to the side reducer.

[0039] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A sealing system for the output shaft of a side reducer in an amphibious vehicle, characterized in that, include: The primary sealing assembly includes an oil baffle ring (10) and an oil seal seat (101). The oil baffle ring (10) is mounted on the output shaft (2) via a flange (1), and the oil seal seat (101) is mounted on the reducer housing (4) via a bearing seat (3). The opposite ends of the oil baffle ring (10) and the oil seal seat (101) cooperate to form a labyrinth seal. The secondary sealing assembly includes a felt ring (20), which is sealed at the opposite ends of the oil baffle ring (10) and the oil seal seat (101) and is located inside the labyrinth seal; The three-stage sealing assembly includes an oil seal (30), which is sealed between the outer peripheral side of the shoulder of the flange (1) and the inner peripheral side of the oil seal seat (101), and is arranged in three sets at axial intervals. The lips of the two sets of oil seals (30) closest to the flange (1) face the flange (1), and the lips of the other set of oil seals (30) face the inner cavity of the reducer housing (4); and The pressure relief and drainage assembly includes a one-way valve (40). The oil seal seat (101), the bearing seat (3), and the reducer housing (4) are all provided with a common drain hole (401). One end of the drain hole (401) is connected to the cavity between the felt ring (20) and the oil seal (30), and the other end is connected to the outside of the reducer housing (4). The one-way valve (40) is located inside the drain hole (401).

2. The amphibious vehicle side reducer output shaft sealing system according to claim 1, characterized in that, The oil baffle ring (10) and the oil seal seat (101) are both provided with recesses (102) at their opposite ends. The two sets of recesses (102) are staggered and mutually seal each other to form the labyrinth seal.

3. The amphibious vehicle side reducer output shaft sealing system according to claim 1, characterized in that, The oil seal seat (101) has a fixed ring groove at the end facing the oil baffle ring (10). One end of the felt ring (20) is sealed and embedded in the fixed ring groove, and the other end face is sealed and fitted with the oil baffle ring (10).

4. The amphibious vehicle side reducer output shaft sealing system according to claim 1, characterized in that, The lips of the two sets of oil seals (30) near the flange (1) are provided with spiral reflux grooves (301).

5. The amphibious vehicle side reducer output shaft sealing system according to claim 1, characterized in that, Two sets of oil injection holes (11) are symmetrically provided on the flange (1). One end of the two sets of oil injection holes (11) is connected to the outside, and the other end is connected through the gap between multiple sets of oil seals (30).

6. The amphibious vehicle side reducer output shaft sealing system according to claim 1, characterized in that, The outer circumferential surface of the shoulder of the flange (1) is provided with a corrosion-resistant and wear-resistant coating.

7. A sealing system for the output shaft of an amphibious vehicle side reducer according to claim 6, characterized in that, The corrosion-resistant and wear-resistant coating comprises an inner and outer base layer, a transition layer, and a functional layer.

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