阅读说明：本技术 一种齿轮箱用高速组合密封 (High-speed combined seal for gear box ) 是由 孙向志 蒋立冬 杨龙 王志强 岳彦炯 于 2020-12-25 设计创作，主要内容包括：本发明的目的在于提供一种齿轮箱用高速组合密封,包括箱体、静环、动环、旋转轴、挡圈、唇形密封,静环固定在箱体,动环通过锁紧螺母与旋转轴固定,静环的外壁内侧设置第一-第三伸出端,动环的内壁外侧设置窄空间伸出端,第一伸出端自身形成内部集油槽,第一伸出端与窄空间伸出端之间形成窄空间,第二伸出端自身形成第一集油槽,第二伸出端与动环内壁之间安装唇形密封,第三伸出端自身形成第二集油槽,第三伸出端与动环内壁之间设置迷宫密封。本发明采用了多层集油槽结构,可以有效的防止齿轮箱内部润滑油向外泄露,对外部的粉尘颗粒进行有效的阻隔,是一项应用范围广,效率高,性能稳定,可靠性高的新技术,特别适用与高速齿轮箱的轴系密封。(The invention aims to provide a high-speed combined seal for a gear box, which comprises a box body, a static ring, a dynamic ring, a rotating shaft, a retainer ring and a lip seal, wherein the static ring is fixed on the box body, the dynamic ring is fixed with the rotating shaft through a locking nut, the inner side of the outer wall of the static ring is provided with a first extending end and a third extending end, the outer side of the inner wall of the dynamic ring is provided with a narrow space extending end, the first extending end forms an internal oil collecting groove, a narrow space is formed between the first extending end and the narrow space extending end, the second extending end forms a first oil collecting groove, the lip seal is arranged between the second extending end and the inner wall of the dynamic ring, the third extending end forms a second oil collecting groove, and the labyrinth seal is arranged between the third extending end and. The invention adopts a multilayer oil collecting tank structure, can effectively prevent lubricating oil in the gear box from leaking outwards and effectively block external dust particles, is a new technology with wide application range, high efficiency, stable performance and high reliability, and is particularly suitable for sealing the shafting of the high-speed gear box.)

1. A high-speed combined seal for a gear box is characterized in that: the oil-water separator comprises a box body, quiet ring, the rotating ring, the rotation axis, the retaining ring, the lip is sealed, quiet ring is fixed at the box, the rotating ring passes through lock nut and is fixed with the rotation axis, the outer wall inboard of quiet ring sets up first-third and stretches out the end, the inner wall outside of rotating ring sets up narrow space and stretches out the end, first end self that stretches out forms inside oil catch bowl, first end and the narrow space of stretching out form narrow space between the end, the second stretches out end self and forms first oil catch bowl, the second stretches out and installs the lip between end and the rotating ring inner wall and seals, the third stretches out end self and forms the second oil catch bowl, the third stretches out and sets up labyrinth seal between end and the rotating ring inner.

2. A high speed composite seal for a gearbox as set forth in claim 1, wherein: the lip-shaped seal is fixed between the second extending end and the inner wall of the movable ring through a retaining ring.

3. A high speed composite seal for a gearbox according to claim 1 or 2, characterised in that: the first oil collecting groove comprises an upper groove body of the first oil collecting groove and a lower groove body of the first oil collecting groove, the second oil collecting groove comprises an upper groove body of the second oil collecting groove and a lower groove body of the second oil collecting groove, the second extending end is provided with a first lubricating oil channel, the first lubricating oil channel is communicated with the lower groove body of the second oil collecting groove and the lower groove body of the first oil collecting groove, the outer wall of the stationary ring is provided with a second lubricating oil channel, and the second lubricating oil channel is communicated with the lower groove body of the first oil collecting groove.

4. A high speed composite seal for a gearbox as set forth in claim 3, wherein: when the rotation axis drives the rotating ring and rotates, the lubricating oil portion that flows down from the box is collected by inside oil trap, and flow back to the box, the lubricating oil that the part splashes is thrown into in the narrow space, lubricating oil through narrow clearance is collected by first oil trap, the lubricating oil that is collected by the upper groove body of first oil trap flows into under the first oil trap in the cell body, and flow through lubricating oil second passageway, the lubricating oil that is not collected by first oil trap receives the sealed back that blocks of lip, block by the labyrinth seal of third oil trap, the lubricating oil that spills is thrown into in the second oil trap, the lubricating oil that is collected by the upper groove body of second oil trap flows into under the second oil trap in the cell body, and the first passageway of lubricating oil through cell body under the second oil trap flows, labyrinth seal forms two-way separation.

Technical Field

The invention relates to a seal, in particular to a gearbox seal.

Background

The gear box is the important equipment in fields such as wide application industry, boats and ships, aviation, at the design in-process of gear box, because the gear box is at the operation in-process, the clean degree of inside operation requires very high, and the lubricating oil of gear and bearing can produce a large amount of splashes simultaneously, for preventing inside lubricating oil outwards to reveal, stops outside dust, steam etc. to get into inside the gear box simultaneously, so the rotary shaft system of gear box can all adopt different seal structure to seal. If the sealing fails, energy waste and environmental pollution can be caused, and if external dust particles enter the interior of the gear box, the gear box can be damaged and even scrapped. Because the pressure difference between the internal pressure of the gear box and the external pressure is small, the current common sealing modes are dynamic sealing modes such as contact sealing and non-contact sealing, and the contact sealing is generally that a dynamic part and a static part of the sealing are mutually contacted to achieve the sealing effect; the non-contact type sealing is generally that the dynamic part and the static part of the sealing are relatively separated, the sealing effect is achieved by the centrifugal force, the pressure difference and other effects generated between the dynamic part and the static part, the rotating part and the fixing part are not in contact with each other, and the loss is avoided, so that the service life is long, the non-contact type sealing is generally not required to be replaced, but a pure single sealing mode cannot achieve a good sealing effect, and particularly in the application of a high-speed gearbox, the leakage condition of a lubricating medium occurs at all times.

Disclosure of Invention

The invention aims to provide a high-speed combined seal for a gear box, which can effectively prevent lubricating oil in the gear box from leaking outwards and effectively block external dust particles.

The purpose of the invention is realized as follows:

the invention relates to a high-speed combined seal for a gear box, which is characterized in that: the oil-water separator comprises a box body, quiet ring, the rotating ring, the rotation axis, the retaining ring, the lip is sealed, quiet ring is fixed at the box, the rotating ring passes through lock nut and is fixed with the rotation axis, the outer wall inboard of quiet ring sets up first-third and stretches out the end, the inner wall outside of rotating ring sets up narrow space and stretches out the end, first end self that stretches out forms inside oil catch bowl, first end and the narrow space of stretching out form narrow space between the end, the second stretches out end self and forms first oil catch bowl, the second stretches out and installs the lip between end and the rotating ring inner wall and seals, the third stretches out end self and forms the second oil catch bowl, the third stretches out and sets up labyrinth seal between end and the rotating ring inner.

The present invention may further comprise:

1. the lip-shaped seal is fixed between the second extending end and the inner wall of the movable ring through a retaining ring.

2. The first oil collecting groove comprises an upper groove body of the first oil collecting groove and a lower groove body of the first oil collecting groove, the second oil collecting groove comprises an upper groove body of the second oil collecting groove and a lower groove body of the second oil collecting groove, the second extending end is provided with a first lubricating oil channel, the first lubricating oil channel is communicated with the lower groove body of the second oil collecting groove and the lower groove body of the first oil collecting groove, the outer wall of the stationary ring is provided with a second lubricating oil channel, and the second lubricating oil channel is communicated with the lower groove body of the first oil collecting groove.

3. When the rotation axis drives the rotating ring and rotates, the lubricating oil portion that flows down from the box is collected by inside oil trap, and flow back to the box, the lubricating oil that the part splashes is thrown into in the narrow space, lubricating oil through narrow clearance is collected by first oil trap, the lubricating oil that is collected by the upper groove body of first oil trap flows into under the first oil trap in the cell body, and flow through lubricating oil second passageway, the lubricating oil that is not collected by first oil trap receives the sealed back that blocks of lip, block by the labyrinth seal of third oil trap, the lubricating oil that spills is thrown into in the second oil trap, the lubricating oil that is collected by the upper groove body of second oil trap flows into under the second oil trap in the cell body, and the first passageway of lubricating oil through cell body under the second oil trap flows, labyrinth seal forms two-way separation.

The invention has the advantages that: the invention can collect most of lubricating oil through the first narrow-gap oil-collecting sealed double-side oil collecting groove, the narrow-gap sealing structure can effectively block the lubricating oil from passing through, the second lip-shaped seal can achieve good sealing effect, in order to prevent the lip-shaped seal from leaking caused by the deflection and vibration of a shaft system, the third oil-collecting labyrinth seal can achieve good blocking effect, the leaked lubricating oil can be completely collected in the oil collecting groove, the labyrinth sealing structure can achieve good bidirectional sealing effect, the lip-shaped sealing structure is used for assisting bidirectional sealing, and the oil collecting device is arranged in a multi-layer combination mode to achieve the final sealing effect.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a sectional view of the seal assembly of the present invention;

fig. 3 is a working principle diagram of the present invention.

Detailed Description

The invention will now be described in more detail by way of example with reference to the accompanying drawings in which:

the technical scheme adopted by the invention for solving the technical problems is as follows: the seal adopts a sealing combination mode of narrow-gap oil collecting seal 11, lip seal 12 and oil collecting labyrinth seal 13. Install the rotating ring 2 of this seal structure on gear box rotation axis 5, set up narrow clearance retaining ring 3 and labyrinth seal tooth on rotating ring 2, this sealed quiet ring 6 of 1 installation on the box, and set up the quiet circle of narrow clearance oil collecting seal 11 and inside and outside 2 oil sumps on quiet ring 6, outside oil sump can be divided into cell body and lower cell body, lay sealed 4 simultaneously, and set up 3 rd oil sumps on the 2 labyrinth seal's of rotating ring corresponding position, the same oil sump can be divided into cell body and lower cell body.

When the shafting rotates, the narrow sealing surface of the narrow gap oil collecting seal 11 can reduce the entering of lubricating oil, 2 oil collecting grooves can effectively collect the lubricating oil which is about to enter the gap and the lubricating oil which flows out from the narrow gap, so that the lubricating oil is prevented from entering the next sealing structure, the lubricating oil in the inner oil collecting groove directly flows back to the box body along the oil groove, and the lubricating oil which enters the outer oil collecting groove flows out of the sealing device along the opening at the bottom of the oil groove; lubricating oil that flows out from first seal can receive the blockking of second lip seal, and lip seal belongs to the contact seal, has better sealed effect, but if shafting skew or vibration when great, still can have certain oil leak phenomenon, so for preventing the secondary situation to take place, in the sealed back of lip, set up the third and say an oil collection labyrinth and seal, even lubricating oil has passed through the second and has said, also can be got rid of in the sealed oil trap of palace, prevent that the lubricating oil from revealing. The labyrinth seal and the lip seal have good sealing effects aiming at external dust particles, and the dust particles can flow back to an oil tank along with an oil return hole at the bottom of the seal even entering the seal and cannot enter a working area of the gear box.

With reference to fig. 1-3, the movable ring 2 of the sealing structure is mounted on the rotating shaft 5 of the gear box, the movable ring 2 is fixed on the shaft by using a lock nut 7, the fixed ring 6 of the sealing structure is mounted on the box body 1, the lip seal 4 is arranged at the same time, and the lip seal 4 is fixed by using a retainer ring 3.

When the rotating shaft drives the rotating ring to rotate, the lubricating oil flows along the route 23 and firstly enters the first narrow-gap oil collecting seal, most of the lubricating oil flowing down from the box body can be collected by the internal oil collecting groove 21 of the narrow-gap oil collecting seal and flows back to the box body along the oil groove, only a part of the splashed lubricating oil can be thrown into the narrow gap 22, the narrow gap is narrow and long, the lubricating oil is stirred in the narrow gap, the passing rate is low, the lubricating oil passing through the narrow gap can be collected by the external oil collecting groove, the lubricating oil collected by the upper groove body 26 of the oil collecting groove can flow into the lower groove body 25 along the groove body and flows out of the seal through the opening of the lower groove body 25, part of the lubricating oil which is not collected by the oil collecting groove can be blocked by the second lip-shaped seal 4, even if the shafting deflects and vibrates to cause part of the lubricating oil to leak, the lubricating oil can be blocked by the third oil collecting labyrinth, lubricating oil collected by the upper groove body 27 of the oil collecting groove flows into the lower groove body 29 along the groove body and flows out of the lower groove body 29 through the opening of the lower groove body to be sealed, the last labyrinth seal 28 can form a good two-way separation effect, and the whole seal achieves a good sealing effect through the three layers of sealing separation.