阅读说明：本技术 用于变桨轴承中的自动抽脂装置 (Automatic grease pumping device for variable-pitch bearing ) 是由 邓伦胜 章宏清 于 2019-09-12 设计创作，主要内容包括：本发明提供了一种用于变桨轴承中的自动抽脂装置,包括连接头和瓶体、盖体,瓶体与盖体相连接,所述连接头呈阶梯状,由中空结构的大头和小头组成,大头的前半部通过螺纹固定在排脂孔内；大头的后半部通过螺纹固定在排脂通道内,盖体内还设置有与排脂通道连通的安装孔,安装孔的尾部设置有弧形弯管,盖体上还设置有排脂口,所述排脂口位于安装孔的首部的下方,排脂口将安装孔与瓶体内部连通,油脂由排脂口进入至瓶体内；所述连接头的内部、安装孔内以及弧形弯管内共同安装有活动的抽脂部件。该装置能够利用吸力将轴承腔内的油脂吸出并进行收集,既能够避免废旧油脂泄漏而污染环境、损坏设备；又能够控制抽脂速度,保证轴承腔内的油脂保有量。(The invention provides an automatic grease pumping device for a variable-pitch bearing, which comprises a connector, a bottle body and a cover body, wherein the bottle body is connected with the cover body, the connector is in a step shape and consists of a large head and a small head which are of a hollow structure, and the front half part of the large head is fixed in a grease discharging hole through threads; the rear half part of the big head is fixed in the grease discharging channel through threads, a mounting hole communicated with the grease discharging channel is further formed in the cover body, an arc-shaped bent pipe is arranged at the tail part of the mounting hole, a grease discharging port is further formed in the cover body and located below the head part of the mounting hole, the mounting hole is communicated with the interior of the bottle body through the grease discharging port, and grease enters the bottle body through the grease discharging port; and movable grease pumping parts are arranged in the connector, the mounting hole and the arc-shaped bent pipe together. The device can suck out and collect the grease in the bearing cavity by utilizing suction, and can avoid the environmental pollution and equipment damage caused by the leakage of the waste grease; and the grease pumping speed can be controlled, and the grease retaining quantity in the bearing cavity is ensured.)

1. The utility model provides an automatic take out fat device for becoming among oar bearing, installs on the grease discharging hole of bearing frame, and revolves around wind turbine generator system's main shaft along with bearing frame, its characterized in that: the automatic grease pumping device at least comprises a connector, a bottle body and a cover body, wherein the bottle body is connected with the cover body, the connector is in a step shape and consists of a large head and a small head which are of hollow structures, the small head is positioned in the grease discharging hole, the upper part of the small head is arranged in a hollow shape, the outer surface of the large head is provided with threads, and the front half part of the large head is fixed in the grease discharging hole through the threads; the side wall of the cover body is provided with a grease discharging channel, the rear half part of the big head is fixed in the grease discharging channel through threads, the cover body is also internally provided with a mounting hole communicated with the grease discharging channel, the head end of the mounting hole is butted with the tail end of the grease discharging channel, the tail part of the mounting hole is provided with an arc-shaped bent pipe, the arc-shaped bent pipe turns downwards and extends into the bottle body, the cover body is also provided with a grease discharging port, the grease discharging port is positioned below the head part of the mounting hole, the mounting hole is communicated with the interior of the bottle body through the grease discharging port, and grease enters the bottle body through the grease discharging port;

The utility model discloses a bottle cap, including the connector, the connector is installed in the installation hole and the arc return bend, take out fat part and the arc return bend, the fat part from top to bottom includes in proper order and scrapes fat ring, connecting rod and wire rope, scrapes fat ring and removes in the inner passage of connector, and wire rope passes and slides in the arc return bend from the arc return bend, and wire rope's head end and connecting rod are connected fixedly, and wire rope's tail end downwardly extending is inside the bottle, and wire rope's trailing end connection is fixed with the slider of counter weight, the slider cover slides from top to bottom on the guide bar and along the guide bar, and the top of guide bar is.

2. The automatic grease pumping device for the pitch bearing according to claim 1, characterized in that: and the bottom of the guide rod is provided with a limiting block for limiting the moving position of the sliding block.

3. The automatic grease pumping device for the pitch bearing according to claim 2, characterized in that: and a damping element is arranged at the contact part of the upper part of the limiting block and the sliding block.

4. The automatic grease pumping device for the pitch bearing according to claim 1, characterized in that: be provided with the isolation sleeve in the bottle, the bottom surface at the lid is fixed on the top of isolation sleeve, and isolation sleeve wraps up wire rope, guide bar and slider inside.

5. The automatic grease pumping device for the pitch bearing according to claim 4, characterized in that: the inside of bottle is provided with the blast pipe with external intercommunication, the position of blast pipe is located between the outer wall of isolation sleeve and the inner wall of bottle.

Technical Field

the invention provides an automatic grease pumping device for a variable-pitch bearing, particularly relates to an automatic grease pumping device for a variable-pitch bearing of a wind generating set, and belongs to the technical field of mechanical lubrication.

Background

in the mechanical field, basically all large mechanical equipment cannot be separated from a bearing, and the bearing can not be lubricated in a rotating mode. Since there is a gap between the rotating shaft and the housing, there is no solid contact, and thermal expansion is allowed, grease in the bearing cavity needs to be sealed to prevent leakage of grease in the bearing cavity. The labyrinth seal is a device which is provided with a plurality of annular seal teeth arranged in sequence around a rotating shaft, a series of cut-off gaps and expansion cavities are formed between the teeth, and the purpose of leakage resistance is achieved by the throttling effect generated when the sealed medium passes through the gaps of the zigzag labyrinth. The labyrinth seal is suitable for high temperature, high pressure and high rotation speed, so that the seal form is widely used for sealing shaft ends and stages of steam turbines, gas turbines, compressors and blowers. However, the grease in the bearing cavity affects the lubrication performance and poses a safety hazard to the bearing due to deterioration and incorporation of abrasive dust during use, and the grease in the seal cavity needs to be renewed periodically or aperiodically.

The bearing seat which is generally small and convenient to update manually can be updated manually when a bearing is replaced or the bearing is shut down, and the large bearing seat mainly adopts a method of automatically supplementing lubricating grease or manually supplementing lubricating grease to extrude waste lubricating grease in a bearing cavity out of the bearing cavity and discharge the waste lubricating grease through a sealing piece or a grease discharge hole arranged on the bearing seat or a bearing end cover. The method for manually or automatically and forcibly supplementing the lubricating grease to extrude the waste lubricating grease has two problems: firstly, pressure is applied to a sealing element to cause sealing leakage, the environment is polluted and difficult to clean, and hidden dangers are left for the action safety of equipment maintenance personnel; secondly, the bearing cavity is heated due to the fact that lubricating grease is filled in the bearing cavity, so that the bearing is abraded in an accelerated manner, and the lubricating grease is deteriorated and loses efficacy in advance; in addition, the grease pumping mechanism adopting electric power as power also exists in the market at present, but the mechanism has the defects of complex installation, higher cost, poor use effect and the like, so the grease pumping mechanism has no popularization value. Most importantly, in some special working occasions, such as a pitch bearing of a wind generating set, grease in a bearing cavity is replaced once in a period, and the period is longer and is usually 12 months, so that when the grease pumping device is used, the grease pumping speed is required to be noticed, and the waste grease at the bottom in the bearing cavity can be pumped out in the period, and the grease retention required by normal work in the bearing cavity can be kept, so that extremely high requirements are provided for the design and the use of a grease pumping mechanism.

disclosure of Invention

The invention provides an automatic grease pumping device for a variable-pitch bearing, aiming at the defects in the background art, the device can suck out and collect grease in a bearing cavity by utilizing suction force, and can avoid environmental pollution and equipment damage caused by waste grease leakage; and the grease pumping speed can be controlled, and the grease retaining quantity in the bearing cavity is ensured.

The technical scheme adopted for realizing the above purpose of the invention is as follows:

An automatic grease pumping device for a variable-pitch bearing is arranged on a grease discharging hole of a variable-pitch bearing seat and revolves around a main shaft of a wind turbine generator along with the bearing seat, and at least comprises a connector, a bottle body and a cover body, wherein the bottle body is connected with the cover body, the connector is in a step shape and consists of a large head and a small head which are of a hollow structure, the small head is positioned in the grease discharging hole, the upper part of the small head is arranged in a hollow shape, the outer surface of the large head is provided with threads, and the front half part of the large head is fixed in the grease discharging hole through the threads; the side wall of the cover body is provided with a grease discharging channel, the rear half part of the big head is fixed in the grease discharging channel through threads, the cover body is also internally provided with a mounting hole communicated with the grease discharging channel, the head end of the mounting hole is butted with the tail end of the grease discharging channel, the tail part of the mounting hole is provided with an arc-shaped bent pipe, the arc-shaped bent pipe turns downwards and extends into the bottle body, the cover body is also provided with a grease discharging port, the grease discharging port is positioned below the head part of the mounting hole, the mounting hole is communicated with the interior of the bottle body through the grease discharging port, and grease enters the bottle body through the grease discharging port;

The utility model discloses a bottle cap, including the connector, the connector is installed in the installation hole and the arc return bend, take out fat part and the arc return bend, the fat part from top to bottom includes in proper order and scrapes fat ring, connecting rod and wire rope, scrapes fat ring and removes in the inner passage of connector, and wire rope passes and slides in the arc return bend from the arc return bend, and wire rope's head end and connecting rod are connected fixedly, and wire rope's tail end downwardly extending is inside the bottle, and wire rope's trailing end connection is fixed with the slider of counter weight, the slider cover slides from top to bottom on the guide bar and along the guide bar, and the top of guide bar is.

And the bottom of the guide rod is provided with a limiting block for limiting the moving position of the sliding block.

And a damping element is arranged at the contact part of the upper part of the limiting block and the sliding block.

be provided with the isolation sleeve in the bottle, the bottom surface at the lid is fixed on the top of isolation sleeve, and isolation sleeve wraps up wire rope, guide bar and slider inside.

The inside of bottle is provided with the blast pipe with external intercommunication, the position of blast pipe is located between the outer wall of isolation sleeve and the inner wall of bottle.

Compared with the prior art, the automatic grease pumping device for the variable-pitch bearing provided by the invention has the following advantages: 1. when the automatic grease pumping device is used, the automatic grease pumping device only needs to be fixed on the grease discharging hole of the variable-pitch bearing seat, grease in the bearing cavity can be pumped out by utilizing power generated in the revolution process of the bearing seat, and additional power is not needed, so that the automatic grease pumping device is simple and convenient to use. 2. When the automatic grease pumping device provided by the invention works, the automatic grease pumping device revolves around the main shaft of the wind turbine generator along with the bearing seat, when the automatic grease pumping device rotates to a positive state, viscous waste grease is accumulated in the grease discharging hole and in an internal channel of the connector, at the moment, the sliding block slides to the bottom of the guide rod, and the sliding block drags the grease scraping ring to move away from the grease discharging hole through the steel wire rope and the connecting rod. Along with the bearing frame continues to rotate, in the process that the automatic liposuction device rotates to the just state of putting, the slider slides to the topmost of bottle, and the slider promotes through wire rope, connecting rod and scrapes the direction removal that the fat ring is close to the grease discharging hole, scrapes the old and useless grease of alicyclic in with connector inner channel ejecting, nevertheless because the upper portion setting of microcephaly is the fretwork form, still has a small part of grease to pass the fretwork and gets into to the fat storage intracavity of scraping the fat ring below. The bearing block continues to rotate, the sliding block slides downwards in the process that the automatic grease pumping device rotates to the right position along with the bearing, the grease scraping ring is dragged to pull outwards, so that a small part of grease in the grease storage cavity is scraped to the mounting hole, and then the grease is discharged into the bottle body through the grease discharging port below the mounting hole. Through tests, the single grease scraping amount is only in milligram level, so that the grease retaining amount required for normal work in the bearing cavity can be maintained. 3. According to the invention, after the grease in the bearing cavity is pumped out, the waste grease can be directly stored in the bottle body, so that the problem that the environment is polluted and difficult to clean due to grease leakage is avoided.

Drawings

Fig. 1 is a schematic view of the overall structure of an automatic liposuction device with an autonomous liposuction function according to the present invention;

FIG. 2 is a schematic structural diagram of a connecting head;

In the figure: 1-bearing seat, 2-grease discharging hole, 3-bottle body, 4-big head, 5-small head, 6-cover body, 7-mounting hole, 8-arc-shaped bent pipe, 9-grease discharging hole, 10-grease scraping ring, 11-connecting rod, 12-steel wire rope, 13-sliding block, 14-guide rod, 15-jackscrew, 16-limiting block, 17-damping element, 18-isolation sleeve, 19-exhaust pipe and 20-hollow.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings.

the integral structure of the automatic grease pumping device for the variable-pitch bearing is shown in figure 1, and a bottle body 3 in figure 1 is in a positive state. The automatic grease pumping device is arranged on the grease discharging hole 2 of the bearing seat 1 and revolves around the main shaft of the wind turbine generator along with the bearing seat. The automatic liposuction device at least comprises a connector, a bottle body 3 and a cover body 6, wherein the bottle body is connected with the cover body. The connector is in a step shape, the structure of the connector is shown in figure 2, and the connector is composed of a large head 4 and a small head 5 which are of hollow structures, wherein the small head is positioned in the grease discharging hole, the upper part of the small head is arranged in a hollow shape, the outer surface of the large head is provided with threads, and the front half part of the large head is fixed in the grease discharging hole through the threads; the side wall of the cover body is provided with a grease discharging channel, and the rear half part of the big head is fixed in the grease discharging channel through threads. Still be provided with the mounting hole 7 with the intercommunication of row fat passageway in the lid, the head end of mounting hole and the terminal butt joint of row fat passageway, the afterbody of mounting hole is provided with arc return bend 8, the arc return bend turns to and deepens down to the bottle in, still is provided with row fat mouth 9 on the lid, arrange the below that the fat mouth is located the prelude of mounting hole, arrange the fat mouth with mounting hole and the inside intercommunication of bottle, the grease enters into to the bottle by arranging the fat mouth.

The utility model discloses a bottle cap, a connecting rod, a guide rod, a slider, a guide rod, a stopper 16, shock absorbing element 17, connecting rod, slider cover, the joint installation of the inside of connector, in the mounting hole and the arc return bend of connector has the fat part of taking out of activity jointly to install, take out fat part from top to bottom including scraping alicyclic 10, connecting rod 11 and wire rope 12 in proper order, scrape fat ring and remove in the inner channel of connector, wire rope passes and slides in the arc return bend from the arc return bend, wire rope's head end and connecting rod. The top end of the guide rod is fixed on the bottom surface of the cover body through a jackscrew 15.

An isolation sleeve 18 is arranged in the bottle body, the top of the isolation sleeve is fixed on the bottom surface of the cover body, and the steel wire rope, the guide rod and the sliding block are wrapped inside the isolation sleeve. An exhaust pipe 19 communicated with the outside is further arranged inside the bottle body, and the exhaust pipe is located between the outer wall of the isolation sleeve and the inner wall of the bottle body.

The working principle of the automatic liposuction device provided by the invention is as follows: automatic take out fat device at the during operation, automatic take out fat device along with bearing frame around wind turbine generator system's main shaft revolution, when automatic take out fat device rotatory to just putting state, all can gather sticky waste grease in the interior passageway of the downthehole and the connector of grease discharging, the slider slides to the bottom of guide bar this moment, and the slider drags through wire rope, connecting rod and scrapes the direction removal that the fat hoop kept away from the grease discharging hole. Along with the bearing frame continues to rotate, in the process that the automatic grease pumping device rotates to the just-placed state, the slider gradually slides to the topmost of the bottle body, the slider pushes the grease scraping ring to move towards the direction close to the grease discharging hole through the steel wire rope and the connecting rod, the grease scraping ring ejects out waste grease in the internal channel of the connector, and due to the fact that the upper portion of the small head is hollow, a small portion of grease still can pass through the hollow 20 to enter the grease storage cavity below the grease scraping ring. The bearing block continues to rotate, the sliding block slides downwards in the process that the automatic grease pumping device rotates to the right position along with the bearing, the grease scraping ring is dragged to pull outwards, so that a small part of grease in the grease storage cavity is scraped to the mounting hole, and then the grease is discharged into the bottle body through the grease discharging port below the mounting hole. Through tests, the single grease scraping amount is only in milligram level, so that the grease retaining amount required for normal work in the bearing cavity can be maintained.