WO2022045522A1

WO2022045522A1 - Apparatus for supplying and recovering yaw drive oil of wind power generator

Info

Publication number: WO2022045522A1
Application number: PCT/KR2021/005788
Authority: WO
Inventors: 김광민; 신동혁; 홍대성; 방조혁
Original assignee: 우림기계 주식회사; 유니슨 주식회사; 한국동서발전 주식회사
Priority date: 2020-08-25
Filing date: 2021-05-10
Publication date: 2022-03-03
Also published as: KR20220026221A; KR102383676B1

Abstract

The present invention proposes an apparatus for draining or injecting oil from or into the inside of a yaw drive housing of a wind power generator. According to the present invention, a body (12) includes a ring mounting hole (12e) which is formed on the inner side thereof, and an oil hole (12c) which is connected to the ring mounting hole, has a diameter smaller than the ring mounting hole, and is installed on the outer side thereof. An oil passage ring (14) is screw-coupled to the inside of the ring mounting hole (12e) of the body (12) to maintain a predetermined position, and includes a plurality of oil passage holes (14a). In addition, an opening/closing cap (18) is elastically supported, inside the body (12), in the direction of closing the oil hole (12c), by a spring (16) having one end portion supported on the oil passage ring (14). Therefore, when the opening/closing cap (28) is spaced apart from the oil hole (12c), oil can be supplied to or recovered from the inside of the yaw drive housing through the oil hole (12c) and the oil passage holes (14a).

Description

Wind power generator yaw drive oil supply and recovery device

The present invention relates to a device for supplying oil to or recovering oil to a yaw drive of a wind power generator, and more particularly, a wind power that can be operated more simply and is particularly advantageous for checking the condition of oil. It relates to a yaw drive oil supply and recovery device of a generator.

Oil for lubrication is built-in inside the housing of the yaw drive of the wind power generator, and this oil must be replaced at regular intervals. In addition, it is essential to collect and inspect a small amount of oil to determine whether it is time for an exchange. The conventional device for oil exchange is not only located on the floor in close contact with the nacelle, but also has a rather inconvenient disadvantage to collect a very small amount of oil for inspection.

An object of the present invention is to provide a yaw drive oil supply and recovery device for a wind power generator that can easily extract a small amount of oil for inspection as well as oil exchange.

Another object of the present invention can be said to be to provide a preliminary oil supply and recovery device installed in the yaw drive housing in a position that can be easily handled by an operator.

The main body of the yaw drive oil supply and recovery device of the wind power generator according to the present invention includes a ring mounting hole formed on the inside, and an oil hole connected to the ring mounting hole and having a smaller diameter than the ring mounting hole and installed on the outside. And the oil through hole is screwed into the ring mounting hole of the body to maintain a predetermined position, and has a plurality of oil through holes. The opening/closing cap is elastically supported in the direction of blocking the oil hole by a spring having one end supported on the oil passage ring inside the main body. Here, when the opening/closing cap is spaced apart from the oil hole, it is possible to supply and recover oil to the inside of the yaw drive housing through the oil hole and the oil passage hole.

And, according to another embodiment of the present invention, the outer end of the opening/closing cap is formed into a close-contact inclined surface, and the inner surface of the oil hole is formed as an inner inclined surface in close contact with the close-contact inclined surface.

According to the present invention having the above configuration, it is possible to install the device of the present invention at an appropriate height of the yaw drive housing, so that the operator's handling becomes convenient. In addition, if the opening/closing cap blocking the oil hole is moved to the inside by the spring, it is also practical that oil can be put into or taken out of the yaw drive housing. In particular, if the opening/closing cap is moved slightly to the extent that the spring is slightly compressed, a small amount of oil can be conveniently drained, so it is expected that a particularly convenient advantage can be expected for oil inspection.

1 is an exemplary view illustrating an oil supply and recovery device applied to a housing of a yaw drive according to the present invention.

2 is a view showing an oil supply and recovery device according to the present invention, (a) is a left side view, (b) is a longitudinal sectional view.

3 is a cross-sectional view of the device of the present invention for explaining a state of supplying or recovering oil.

Next, based on the embodiment shown in the drawings, the present invention will be described in more detail.

As shown in FIG. 1 , the yaw drive housing 2 is supported by a nacelle 4 , which can be referred to as a support bottom surface. An existing oil exchange passage opened and closed by a wrench plug 6 is provided in a portion adjacent to the nacelle 4 . Here, according to the present invention, the device 10 for supply and recovery of oil can be installed in a portion spaced upward from the nacelle 4, so it can be said that handling convenience is secured.

Next, referring to FIG. 2, an oil supply and recovery device of the present invention will be described in detail. As shown, the device of the present invention includes a main body 12, an oil passage ring 14 that is coupled to the inside of the body to maintain a fixed position and has an oil passage hole 14a, and the oil passage ring ( 14) is elastically supported by a spring 16 and consists of an opening/closing cap 18 that opens and closes the oil hole 12c of the body 12.

The main body 12 is to be mounted on the yaw drive housing 2, for example, may be screwed using a threaded portion 12a formed on the outside of the main body 12. When screwed in this way, it is also preferable to install a sealing ring (12b) for preventing oil leakage between the housing (2). Here, the screw thread portion (12a) has a smaller diameter than the head portion (12d), and the sealing ring (12b) is installed inside (edge portion) of the step portion made by the difference in diameter.

And the oil through ring 14 is coupled to the ring mounting hole 12e, which is a hole formed in the inner side of the body 12 (in the direction toward the inside of the yaw drive), to maintain a fixed state. This oil through ring 14 is preferably fixed to the inside of the ring mounting hole (12e) by screwing. That is, male threads are formed on the entire outer circumferential surface of the oil passage ring 14 , and female threads are formed on the inner periphery of the ring mounting hole 12e of the body 12 , which means that both are coupled to each other. A plurality of oil passage holes 14a are formed in the oil passage ring 14, and in the illustrated embodiment, a plurality of oil passage holes 14a are arranged in a circle.

On the opposite side of the ring mounting hole 12e in the body 12, an oil hole 12c is formed to communicate with the ring mounting hole 12e. The oil ball 12c can be said to be molded so that the oil inside can be completely discharged to the outside or the oil can be put inside from the outside. The oil hole 12c itself may be opened and closed by the wrench plug 14 . This oil hole (12c) is formed to have a smaller diameter than the above-described ring mounting hole (12e).

And in order to open and close the oil hole 12c inside the body 12, the opening/closing cap 18 is elastically supported toward the oil hole 12c by the spring 16. The opening/closing cap 18 is supported toward the oil hole 12c by the spring 16, so that the opening/closing cap 18 is in close contact with the inner surface of the body between the ring mounting hole 12e and the oil hole 12c to substantially prevent the opening and closing cap 18 from oil. It can be said to block the ball (12c).

In the illustrated embodiment, between the ring mounting hole (12e) and the oil hole (12c) is connected to the inner inclined surface (13). Here, the inner inclined surface 13 may be substantially referred to as the inner surface of the oil hole 12c. And the outer surface of the opening/closing cap 18 is formed with a contact inclined surface 18c in contact with the inner inclined surface 13 inside the main body 12 . Therefore, when the opening/closing cap 18 receives a force toward the oil hole 12c by the spring 16, the contact inclined surface 18c is in close contact with the inner inclined surface 13 so that the oil hole 12c is sealed. The closed state is shown in FIG. 2 . In this general state, it can be seen that the oil hole 12c is blocked by the opening/closing cap 18. Here, it is natural that the contact inclined surface 18c and the inner inclined surface 13 have a substantially partial conical shape.

In this state, in order to take the oil out or put it inside, the contact inclined surface 18c of the opening/closing cap 18 must be spaced apart from the inner inclined surface 13 . Of course, it is natural that the wrench plug 14 should be made in a disassembled state from the main body 12 . When the wrench plug 14 is disassembled from the body 12, the stick S is pushed inside through the oil hole 12c, and the opening and closing cap 18 is pushed inward, and the opening and closing cap 18 is a spring Overcoming the force of (16), it moves inward (to the left in the drawing).

In this case, the opening/closing cap 18 and the inside of the main body 12 are spaced apart, and the state shown in FIG. 3 is obtained. And in this state, the oil inside the yaw drive housing 2 comes out via the oil through hole 14a, and through the oil hole 12c along the space between the opening and closing cap 18 and the inside of the body 12. be able to go outside. In such a state, in order to allow the oil to come out smoothly to the outside, the oil passage hole 14a should not be blocked while the opening/closing cap 18 is moved to the inside of the yaw drive housing.

And, the diameter of the opening/closing cap 18 is smaller than the diameter of the ring mounting hole 12e of the main body 12, so that an interval through which oil can flow should be formed. In the embodiment shown here, the contact inclined surface 18c and the inner inclined surface 13 are configured to allow oil to flow by being in contact with or spaced apart from each other, but it is obvious that it is not limited to this embodiment. For example, as long as the opening/closing cap 18 is spaced apart from the inner surface of the main body 12 so that oil can flow into the oil hole 12c, any other configuration is sufficient. In the illustrated embodiment, in order to support the spring 16 more stably, the seating groove 15 formed on the inside of the oil passage ring 14 and the inside of the opening/closing cap 18 inside the boss 18a It can be seen that the molded grooves 18b are inserted and supported.

And if the state as shown in FIG. 3 is maintained, the oil in the housing 2 is substantially discharged to the outside, or it is possible to supply the external oil to the inside of the housing 2 . Moreover, in the present invention, for example, if the opening and closing cap 18 is pushed with a stick S for a while, a small amount of oil will flow out. That is, in the present invention, for example, when it is necessary to drain a small amount of oil to the outside for inspection, it is expected that there will be considerable convenience in being able to extract a small amount by the above-described method.

Claims

a body 12 having a ring mounting hole formed on the inside (12e) and an oil hole (12c) connected to the ring mounting hole and having a smaller diameter than the ring mounting hole and installed on the outside;

An oil passage ring 14 having a plurality of oil passage holes 14a screwed to the inside of the ring mounting hole 12e of the body 12 to maintain a predetermined position; And

It is composed of an opening/closing cap 28 that is elastically supported in a direction to block the oil hole 12c by a spring 16 having one end supported on the oil passage ring 14 inside the body 12;

When the opening/closing cap 28 is spaced apart from the oil hole 12c, through the oil hole 12c and the oil passage hole 14a, the supply and recovery of oil to the inside of the yaw drive housing is possible. Drive oil supply and recovery device.
The method of claim 1,

The outer end of the opening/closing cap 28 is molded into a close contact inclined surface 18c, and the inner surface of the oil hole 12c is formed into an inner inclined surface 13 that is in close contact with the close contact inclined surface 18c. The yaw drive oil supply of the wind power generator and recovery devices.