Operation method of a centralized lubrication device for wind turbine pitch control

Abstract

The camshaft of the oil pump of the present invention is provided with an oil bag lower cover body, an oil pump motor is provided at the lower end of the oil pump box, an oil inlet valve, an oil outlet valve and an overflow valve are respectively provided on the sides of the oil pump box, an oil distribution tank and an oil pump are respectively provided in the oil pump box, an oil through hole is provided in the center of the oil bag lower cover body, a telescopic oil bag is provided in the middle of the upper end of the oil bag lower cover body, an oil bag upper cover body is provided above the telescopic oil bag, at least three support bars are evenly distributed between the edge of the oil bag upper cover body and the edge of the oil bag lower cover body, a telescopic spring is provided between the oil bag upper cover body and the telescopic oil bag, a valve control mechanism is provided on the lower side of the oil bag upper cover body, and a valve pull rope is provided between the valve control mechanism and the overflow valve; the pressure in the oil bag can be increased by contracting the telescopic oil bag and tightening the telescopic oil bag with the telescopic spring, thereby improving the oil supply pressure, thereby effectively solving the problems of oil supply interruption, low oil supply pressure and poor oil supply effect caused by backflow of lubricating oil due to the rotation of the fan.

Description

Technical Field

[0001] The invention relates to the technical field of centralized lubrication for variable pitch wind turbines, and in particular to an operating method for a centralized lubrication device for variable pitch wind turbines. Background Art

[0002] The lubrication of the wind turbine pitch control requires that a centralized lubrication device be installed in the hub cover of the wind turbine to supply oil and lubricate the pitch bearing. Since the hub cover of the wind turbine pitch control will rotate with the rotation of the blades, the oil tank in the existing centralized lubrication device will flow back to the top of the oil tank when the wind turbine rotates, causing the oil pump in the centralized lubrication device to intermittently be unable to contact the lubricating oil, resulting in oil supply interruption or low oil supply pressure and poor oil supply effect. Therefore, how to solve the problems of oil supply interruption, low oil supply pressure and poor oil supply effect caused by the backflow of lubricating oil caused by the rotation of the wind turbine in the existing centralized lubrication device for wind turbine pitch control has become a long-standing technical problem that is difficult to solve.

[0003] The Chinese utility model patent document with patent number CN201920214636.4 discloses a centralized lubrication device, which solves the problem that when the lubricating oil is not measured enough, the oil cannot be discharged from the hose at a higher position, affecting the lubrication of the hose connecting device. When the lubricating oil reserves are insufficient, different oil outlet pipes will not be affected by the height and can all discharge oil. However, when the fan is rotating, the lubricating oil in the oil tank will flow back to the top of the oil tank, causing the oil pump in the centralized lubrication device to intermittently be unable to contact the lubricating oil, resulting in oil supply interruption or low oil supply pressure and poor oil supply effect.

[0004] In view of the above reasons, an operating method of a centralized lubrication device for variable pitch wind turbines is now developed. Summary of the invention

[0005] The present invention is to solve the problems of oil supply interruption, low oil supply pressure and poor oil supply effect caused by the backflow of lubricating oil in the oil tank due to the rotation of the fan in the existing wind turbine pitch centralized lubrication device. An operation method of the centralized lubrication device for wind turbine pitch control is provided. The telescopic oil bag can be contracted so that the lubricating oil in the telescopic oil bag is always in full contact with the oil pump when the fan rotates. The telescopic oil bag can be tightened by the telescopic spring to increase the pressure in the oil bag, thereby increasing the oil supply pressure. The problem of oil supply interruption, low oil supply pressure and poor oil supply effect caused by the backflow of lubricating oil in the oil tank due to the rotation of the fan in the existing wind turbine pitch centralized lubrication device is effectively solved.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: an operating method of a centralized lubrication device for variable pitch of a wind turbine, which comprises: an oil pump box, an oil bag lower cover, an oil pump motor, an oil inlet valve, an oil outlet valve, an overflow valve, an oil distribution tank, an oil pump, an oil through hole, a telescopic oil bag, an oil bag upper cover, a support bar, a telescopic spring, a valve control mechanism, an upper spring mounting seat, a lower spring mounting seat, a pull rope support column, a pull rope lever, and a valve pull rope; an oil bag lower cover is arranged at the upper end of the oil pump box, an oil pump motor is arranged at the lower end of the oil pump box, and a side An oil inlet valve, an oil outlet valve and an overflow valve are respectively arranged on the surface, an oil distribution tank and an oil pump are respectively arranged in the oil pump box, an oil through hole is arranged in the center of the oil bag lower cover body, a telescopic oil bag is arranged on the upper surface of the oil bag lower cover body, an oil bag upper cover body is arranged above the telescopic oil bag, at least three support bars are evenly distributed between the edge of the oil bag upper cover body and the edge of the oil bag lower cover body, a telescopic spring is arranged between the lower surface of the oil bag upper cover body and the upper surface of the telescopic oil bag, a valve control mechanism is arranged on the lower side of the oil bag upper cover body, and a valve pull rope is arranged between the valve control mechanism and the overflow valve.

[0007] The telescopic oil bag is a corrugated oil bag.

[0008] An upper spring mounting seat is arranged on the lower surface of the oil bag upper cover body, a lower spring mounting seat is arranged on the upper surface of the telescopic oil bag, the upper end of the telescopic spring is connected to the upper spring mounting seat, and the lower end of the telescopic spring is connected to the lower spring mounting seat.

[0009] The structure of the overflow valve control mechanism is as follows: a pull rope support column is vertically arranged in the center of the lower surface of the oil bag upper cover body, the lower end of the pull rope support column is hinged to a pull rope lever, a valve pull rope is arranged between one end of the pull rope lever and the overflow valve and passes through the oil bag upper cover body, the other end of the pull rope lever corresponds to one side of the upper surface of the lower spring mounting seat, and the pull rope lever reciprocates around the hinged part of the pull rope support column and the pull rope lever as the axis, driving the valve pull rope to pull the overflow valve to control the opening or closing of the overflow valve.

[0010] The oil inlet of the oil pump is connected to the distribution oil tank, the oil outlet of the oil pump is connected to the oil outlet valve, the oil inlet valve and the oil outlet valve are connected to the distribution oil tank, and the telescopic oil bag is connected to the distribution oil tank through the oil hole.

[0011] Working principle: When in use, it is necessary to first inject lubricating oil into the telescopic oil bag, connect the oil outlet hole of the oil pumping device with the oil inlet valve on the side of the oil pump box, and the lubricating oil in the oil pumping device enters the distribution tank through the oil inlet valve, and the lubricating oil in the distribution tank enters the telescopic oil bag through the oil hole in the middle of the lower cover of the oil bag. After the lubricating oil enters the telescopic oil bag, the pressure in the telescopic oil bag rises, the telescopic oil bag stretches upward, and the telescopic spring between the telescopic oil bag and the upper cover of the oil bag is compressed. When the telescopic oil bag stretches upward to the set height, the upper end surface of the telescopic oil bag contacts the lower end of the pull rope lever hinged to the lower end of the pull rope support column. At this time, if lubricating oil is continuously injected into the telescopic oil bag, the telescopic oil bag continues to stretch upward. During the continuous stretching process of the telescopic oil bag, the telescopic oil bag is pushed up by the pull rope lever at the end of the valve pull rope that is not connected to the pull rope, and the pull rope lever is connected to the end of the valve pull rope The cam is in a closed position and the oil in the oil bag is in a closed position, so that the oil in the oil bag does not overflow.

[0012] When lubricating, the oil outlet valve on one side of the oil pump box is connected to the part to be lubricated, and the oil pump is started by starting the oil pump motor. The telescopic spring between the telescopic oil bag and the upper cover of the oil bag provides elastic force to the telescopic oil bag. Under the action of the elastic force, the telescopic oil bag is squeezed and contracted downward, and the lubricating oil in the telescopic oil bag enters the distribution tank through the oil hole in the middle of the lower cover of the oil bag. Under the action of the oil pump, the lubricating oil in the distribution tank enters the part to be lubricated through the oil outlet valve to lubricate the target part.

[0013] The beneficial effects of the present invention are as follows: the present invention has a simple structure and is easy to use. It can prevent the lubricating oil in the telescopic oil bag from flowing back when the fan rotates by contracting the telescopic oil bag, thereby ensuring that the lubricating oil in the telescopic oil bag is always in full contact with the oil pump. It can increase the pressure in the oil bag by tightening the telescopic oil bag with a telescopic spring, thereby increasing the oil supply pressure. It can reduce the pressure in the telescopic oil bag by unloading oil with a relief valve, thereby preventing the telescopic oil bag from bursting. It effectively solves the problems of oil supply interruption, low oil supply pressure and poor oil supply effect caused by the backflow of lubricating oil due to the rotation of the fan in the existing fan variable pitch centralized lubrication device. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention will be further described below in conjunction with the accompanying drawings:

[0015] Figure 1 It is a schematic diagram of the general assembly structure of the present invention;

[0016] Figure 2 It is a schematic diagram of the internal structure of the oil pump box of the present invention;

[0017] Figure 3 It is a schematic diagram of the top view of the structure of the present invention;

[0018] Figure 1 , 2 , 3: oil pump box 1, oil bladder lower cover 2, oil pump motor 3, oil inlet valve 4, oil outlet valve 5, overflow valve 6, distribution oil tank 7, oil pump 8, oil through hole 9, telescopic oil bladder 10, oil bladder upper cover 11, support bar 12, telescopic spring 13, valve control mechanism 14, upper spring mounting seat 15, lower spring mounting seat 16, pull rope support column 17, pull rope lever 18, valve pull rope 19. DETAILED DESCRIPTION

[0019] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments:

[0020] An oil bag lower cover body 2 is arranged at the upper end of the oil pump box 1, an oil pump motor 3 is arranged at the lower end of the oil pump box 1, an oil inlet valve 4, an oil outlet valve 5 and an overflow valve 6 are respectively arranged on the sides of the oil pump box 1, an oil distribution tank 7 and an oil pump 8 are respectively arranged in the oil pump box 1, an oil through hole 9 is arranged in the center of the oil bag lower cover body 2, a telescopic oil bag 10 is arranged on the upper surface of the oil bag lower cover body 2, an oil bag upper cover body 11 is arranged above the telescopic oil bag 10, at least three support bars 12 are evenly distributed between the edge of the oil bag upper cover body 11 and the edge of the oil bag lower cover body 2, a telescopic spring 13 is arranged between the lower surface 11 of the oil bag upper cover body and the upper surface of the telescopic oil bag 10, a valve control mechanism 14 is arranged on the lower side of the oil bag upper cover body 11, and a valve pull rope 20 is arranged between the valve control mechanism 14 and the overflow valve 6.

[0021] The telescopic oil bag 10 is a corrugated oil bag.

[0022] An upper spring mounting seat 15 is disposed on the lower surface of the oil bag upper cover body 11 , a lower spring mounting seat 16 is disposed on the upper surface of the telescopic oil bag 10 , the upper end of the telescopic spring 13 is connected to the upper spring mounting seat 15 , and the lower end of the telescopic spring 15 is connected to the lower spring mounting seat 16 .

[0023] The structure of the overflow valve control mechanism is as follows: a pull rope support column 16 is vertically arranged in the center of the lower surface of the oil bag upper cover body 12, and the lower end of the pull rope support column 16 is hinged to a pull rope lever 18. A valve pull rope 20 is arranged between one end of the pull rope lever 18 and the overflow valve 6 and passes through the oil bag upper cover body 11. The other end of the pull rope lever 18 corresponds to one side of the upper surface of the lower spring mounting seat 16. The pull rope lever 18 reciprocates around the hinged part of the pull rope support column 16 and the pull rope lever 18, driving the valve pull rope 19 to pull the overflow valve 6 to control the opening or closing of the overflow valve 6.

[0024] The oil inlet of the oil pump 8 is connected to the distribution oil tank 7, the oil outlet of the oil pump 8 is connected to the oil outlet valve 5, the oil inlet valve 4 and the oil outlet valve 5 are both connected to the distribution oil tank 7, and the telescopic oil bag 10 is connected to the distribution oil tank 7 through the oil hole 9.

Claims

1. An operating method of a centralized lubrication device for variable pitch wind turbines, the centralized lubrication device for variable pitch wind turbines comprising: an oil pump box (1), an oil bag lower cover (2), an oil pump motor (3), an oil inlet valve (4), an oil outlet valve (5), an overflow valve (6), an oil distribution tank (7), an oil pump (8), an oil through hole (9), a telescopic oil bag (10), an oil bag upper cover (11), a support bar (12), a telescopic spring (13), a valve control mechanism (14), an upper spring mounting seat (15), a lower spring mounting seat (16), a pull rope support column (17), a pull rope lever (18), and a valve pull rope (19); characterized in that: An oil bag lower cover (2) is arranged at the upper end of the oil pump box (1), an oil pump motor (3) is arranged at the lower end of the oil pump box (1), an oil inlet valve (4), an oil outlet valve (5) and an overflow valve (6) are arranged on the side of the oil pump box (1), an oil distribution tank (7) and an oil pump (8) are arranged in the oil pump box (1), an oil hole (9) is arranged in the center of the oil bag lower cover (2), a telescopic oil bag (10) is arranged on the upper surface of the oil bag lower cover (2), and the telescopic oil bag (10) is arranged on the upper surface of the telescopic oil bag (10). ), an oil bag upper cover (11) is arranged above the oil bag upper cover (11), at least three support bars (12) are evenly distributed between the edge of the oil bag upper cover (11) and the edge of the oil bag lower cover (2), a telescopic spring (13) is arranged between the lower surface of the oil bag upper cover (11) and the upper surface of the telescopic oil bag (10), a valve control mechanism (14) is arranged on the lower side of the oil bag upper cover (11), and a valve pull rope (19) is arranged between the valve control mechanism (14) and the overflow valve (6); The telescopic oil bag (10) is a corrugated oil bag; The structure of the valve control mechanism is as follows: a pull rope support column (17) is vertically arranged at the center of the lower surface of the oil bag upper cover body (11); the lower end of the pull rope support column (17) is hingedly connected to a pull rope lever (18); a valve pull rope (19) is arranged between one end of the pull rope lever (18) and the overflow valve (6) and passes through the oil bag upper cover body (11); the other end of the pull rope lever (18) corresponds to one side of the upper surface of the lower spring mounting seat (16); the pull rope lever (18) reciprocates around the hinged portion between the pull rope support column (17) and the pull rope lever (18) as the axis, driving the valve pull rope (19) to pull the overflow valve (6) to control the opening or closing of the overflow valve (6); The operation method is as follows: when in use, lubricating oil needs to be pumped into the telescopic oil bag (10) first, and the oil outlet hole of the oil pumping device is connected to the oil inlet valve (4) on the side of the oil pump box (1) so that the lubricating oil in the oil pumping device enters the distribution oil tank (7) through the oil inlet valve (4), and the lubricating oil in the distribution oil tank (7) enters the telescopic oil bag (10) through the oil through hole (9) in the middle of the lower cover body (2) of the oil bag. After the lubricating oil enters the telescopic oil bag (10), the pressure in the telescopic oil bag (10) rises, the telescopic oil bag (10) stretches upward, and the telescopic spring (13) between the telescopic oil bag (10) and the upper cover body (11) of the oil bag is compressed. When the telescopic oil bag (10) stretches upward to a set height, the upper end surface of the telescopic oil bag (10) is in contact with the pull rope support. The lower end of the pull rope lever (18) hinged at the lower end of the support column (17) contacts the lower end of the pull rope lever (18). At this time, if lubricating oil is continuously injected into the telescopic oil bag (10), the telescopic oil bag (10) continues to stretch upward. During the continuous stretching process of the telescopic oil bag (10), the telescopic oil bag (10) is pushed upward by the end of the pull rope lever (18) not connected to the valve pull rope (19). The end of the pull rope lever (18) connected to the valve pull rope (19) rotates downward along the hinged part of the pull rope support column (17) and the pull rope lever (18). While the pull rope lever (18) rotates, the valve pull rope (19) between the upper end of the pull rope lever (18) and the overflow valve (6) is pulled to pull the overflow switch in the overflow valve (6) upward. At this time, the overflow valve (6) is in the open state. In the open state, the lubricating oil in the telescopic oil bag (10) enters the relief valve (6) through the distribution oil tank (7), and is discharged to the external space through the relief valve (6) to relieve the pressure of the telescopic oil bag (10), thereby preventing the telescopic oil bag (10) from exploding due to excessive pressure in the telescopic oil bag (10). When the pressure in the telescopic oil bag (10) is relieved to a normal value, the telescopic oil bag (10) contracts, and the end of the pull rope lever (18) not connected to the valve pull rope (19) rotates downward along the hinged portion between the pull rope support column (17) and the pull rope lever (18), driving the end of the pull rope lever (18) connected to the valve pull rope (19) to rotate upward along the hinged portion between the pull rope support column (17) and the pull rope lever (18), and the overflow switch in the relief valve (6) rebounds. When the overflow valve (6) is in a closed state, the lubricating oil in the telescopic oil bag (10) no longer overflows; when lubricating, the oil outlet valve (5) on one side of the oil pump box (1) is connected to the part to be lubricated, and the oil pump (8) is started by starting the oil pump motor (3). The telescopic spring (13) between the telescopic oil bag (10) and the oil bag upper cover (11) provides elastic force to the telescopic oil bag (10). Under the action of the elastic force, the telescopic oil bag (10) is squeezed and contracted downward, and the lubricating oil in the telescopic oil bag (10) enters the distribution oil tank (7) through the oil hole (9) in the middle of the oil bag lower cover (2). Under the action of the oil pump (8), the lubricating oil in the distribution oil tank (7) enters the part to be lubricated through the oil outlet valve (5), thereby lubricating the target part.

2. The method for operating a centralized lubrication device for variable pitch wind turbine according to claim 1, characterized in that: An upper spring mounting seat (15) is arranged in the middle of the lower surface of the oil bag upper cover body (11), a lower spring mounting seat (16) is arranged in the middle of the upper surface of the telescopic oil bag (10), the upper end of the telescopic spring (13) is connected to the upper spring mounting seat (15), and the lower end of the telescopic spring (13) is connected to the lower spring mounting seat (16).

3. The method for operating a centralized lubrication device for variable pitch wind turbine according to claim 1, characterized in that: The oil inlet of the oil pump (8) is connected to the distribution oil tank (7), the oil outlet of the oil pump (8) is connected to the oil outlet valve (5), the oil inlet valve (4) and the oil outlet valve (5) are both connected to the distribution oil tank (7), and the telescopic oil bag (10) is connected to the distribution oil tank (7) through the oil hole (9).

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