Centralized lubricating system of wind generating set

Abstract

The utility model relates to the technical field of wind generating sets, in particular to a centralized lubricating system of a wind generating set, which comprises a lubricating oil tank and an oil tank cover arranged at the top of the lubricating oil tank, and is characterized in that the bottom of the lubricating oil tank is connected with an oil conveying header pipe, a lubricating pump is arranged on the oil conveying header pipe, and a lubricating oil pump is arranged on the lubricating pump. The output end of the oil transportation main pipe is connected with a distributor; a first oil conveying branch pipe and a second oil conveying branch pipe are connected to the distributor, and a first blocking sensor and a second blocking sensor are arranged on the first oil conveying branch pipe and the second oil conveying branch pipe respectively. According to the centralized lubricating system of the wind generating set, when blockage occurs, lubricating oil in the oil conveying branch pipes can be sucked into the lubricating oil tank again through the reflux pump, and therefore waste is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of wind turbine generators, and particularly relates to a centralized lubrication system for wind turbine generators. Background Art

[0002] The key lubrication parts of a wind turbine generator include a gearbox, a generator bearing, a yaw system bearing and gear, a hydraulic braking system and a main bearing. Therefore, the lubrication of a wind turbine generator is a key factor to ensure its efficient operation and extend its service life. When a blockage sensor in the existing lubrication system detects a blockage, the unit needs to be shut down for maintenance. During maintenance, it is necessary to dredge the blocked part according to the blockage situation. When dredging, it is difficult to collect the lubricating oil in the lubrication pipeline, resulting in waste. Content of the Utility Model

[0003] The purpose of the utility model: The utility model provides a centralized lubrication system for wind turbine generators. When a blockage occurs, the lubricating oil in the oil delivery branch pipe can be sucked back into the lubricating oil tank through a return pump, thereby reducing waste.

[0004] To achieve the above purpose, the technical solution of the utility model is as follows:

[0005] A centralized lubrication system for wind turbine generators includes a lubricating oil tank. A tank cover is provided at the top of the lubricating oil tank. An oil delivery main pipe is connected to the bottom of the lubricating oil tank. A lubrication pump is provided on the oil delivery main pipe. The output end of the oil delivery main pipe is connected to a distributor;

[0006] A first oil delivery branch pipe and a second oil delivery branch pipe are connected to the distributor. A first blockage sensor and a second blockage sensor are respectively provided on the first oil delivery branch pipe and the second oil delivery branch pipe;

[0007] A first return pipe is connected to the first oil delivery branch pipe. The output end of the first return pipe is connected to the lubricating oil tank. A first electric valve and a first return pump are successively arranged on the first return pipe along the conveying direction;

[0008] A second return pipe is connected to the second oil delivery branch pipe. The output end of the second return pipe is connected to the lubricating oil tank. A second electric valve and a second return pump are successively arranged on the second return pipe along the conveying direction.

[0009] As an improvement: A third electric valve is provided on the oil delivery main pipe.

[0010] As an improvement: A supplementary pipe is provided at the top of the lubricating oil tank. A fourth electric valve is provided on the supplementary pipe.

[0011] As an improvement, a temperature sensor and a liquid level sensor are provided at the bottom of the lubricating oil tank, and a heating wire is wound around the lubricating oil tank.

[0012] As an improvement, a hydraulic cylinder is vertically upward provided at the bottom of the lubrication, and a filter screen plate is fixed on the piston rod of the hydraulic cylinder.

[0013] In summary, the utility model has the following beneficial effects:

[0014] 1. When a blockage occurs and shutdown for maintenance is required, the lubricating oil in the oil delivery branch pipe can be re-sucked into the lubricating oil tank through the return pump, thereby reducing waste;

[0015] 2. The temperature sensor can sense the temperature of the lubricating oil in the lubricating oil tank. When the winter temperature is relatively low, the heating wire can be started to heat the lubricating oil to achieve a good lubrication effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art.

[0017] Figure 1 It is a schematic diagram of the overall structure of a centralized lubrication system for a wind turbine generator set;

[0018] Wherein: 1, lubricating oil tank; 2, tank cover; 3, main oil delivery pipe; 4, lubricating pump; 5, distributor; 6, first oil delivery branch pipe; 7, second oil delivery branch pipe; 8, first blockage sensor; 9, second blockage sensor; 10, first return pipe; 11, second return pipe; 12, first electric valve; 13, second electric valve; 14, first return pump; 15, second return pump; 16, third electric valve; 17, supplementary pipeline; 18, fourth electric valve; 19, hydraulic cylinder; 20, filter screen plate; 21, temperature sensor; 22, liquid level sensor; 23, heating wire. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The following will further describe the present utility model in detail with reference to the drawings.

[0020] Please refer to Figure 1 , a centralized lubrication system for a wind turbine generator set, including a lubricating oil tank 1, a tank cover 2 is provided at the top of the lubricating oil tank 1, a main oil delivery pipe 3 is connected to the bottom of the lubricating oil tank 1, a lubricating pump 4 is provided on the main oil delivery pipe 3, and the output end of the main oil delivery pipe 3 is connected to a distributor 5;

[0021] A first oil delivery branch pipe 6 and a second oil delivery branch pipe 7 are connected to the distributor 5, and a first blockage sensor 8 and a second blockage sensor 9 are respectively provided on the first oil delivery branch pipe 6 and the second oil delivery branch pipe 7;

[0022] A first return pipe 10 is connected to the first oil delivery branch pipe 6, and the output end of the first return pipe 10 is connected to the lubricating oil tank 1. A first electric valve 12 and a first return pump 14 are successively arranged on the first return pipe 10 along the conveying direction.

[0023] A second return pipe 11 is connected to the second oil delivery branch pipe 7, and the output end of the second return pipe 11 is connected to the lubricating oil tank 1. A second electric valve 13 and a second return pump 15 are successively arranged on the second return pipe 11 along the conveying direction.

[0024] In this embodiment, when a blockage occurs and shutdown for maintenance is required, the lubricating oil in the oil delivery branch pipe can be sucked back into the lubricating oil tank 1 through the return pump, thereby reducing waste.

[0025] A third electric valve 16 is arranged on the main oil delivery pipe 3.

[0026] A supplementary pipeline 17 is arranged at the top of the lubricating oil tank 1, and a fourth electric valve 18 is arranged on the supplementary pipeline 17. A temperature sensor 21 and a liquid level sensor 22 are arranged at the bottom of the lubricating oil tank 1, and a heating wire 23 is wound around the lubricating oil tank 1. In this embodiment, the temperature sensor 21 can sense the temperature of the lubricating oil in the lubricating oil tank 1. When the winter temperature is relatively low, the heating wire 23 can be started to heat the lubricating oil to achieve a good lubrication effect. The liquid level sensor 22 can detect the liquid level of the lubricating oil in the lubricating oil tank 1. When the liquid level is relatively low, the fourth electric valve 18 is opened to facilitate timely replenishment of the lubricating oil.

[0027] A hydraulic cylinder 19 is vertically arranged upward at the bottom of the lubrication, and a filter screen plate 20 is fixed on the piston rod of the hydraulic cylinder 19. In this embodiment, the lubricating oil in the lubricating oil tank 1 can be filtered through the filter screen plate 20. When the filter screen plate 20 needs to be cleaned, the filter screen plate 20 can be moved to the top of the lubricating oil tank 1, and the tank cover 2 is opened for cleaning.

[0028] Working principle: The lubricating oil is injected into the lubricating oil tank 1, and the lubricating oil flows through the filter screen plate 20 to the bottom of the lubricating oil tank 1. Under the action of the lubricating pump 4, the lubricating oil is conveyed to the parts to be lubricated through the distributor 5, the first oil delivery branch pipe 6, and the second oil delivery branch pipe 7.

[0029] When the blockage sensors on the first oil delivery branch pipe 6 and the second oil delivery branch pipe 7 sense that the pipeline is blocked, the lubricating pump 4 stops operating, the third electric valve 16 is closed, the first electric valve 12 and the second electric valve 13 are opened, and the first return pump 14 and the second return pump 15 are started to collect and convey the residual lubricating oil in the first oil delivery branch pipe 6, the second oil delivery branch pipe 7, and the distributor 5 into the interior of the lubricating oil tank 1. At this time, maintenance can be carried out.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them; although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that it is still possible to modify the specific implementation manners of the present invention or perform equivalent replacements on some technical features; without departing from the spirit of the technical solutions of the present invention, they should all be covered within the scope of the technical solutions claimed by the present invention.

Claims

1. A centralized lubrication system for a wind turbine generator set, comprising a lubricating oil tank, a tank cover is provided on the top of the lubricating oil tank, characterized in that: An oil main pipe is connected to the bottom of the lubricating oil tank, a lubrication pump is provided on the oil main pipe, and a distributor is connected to the output end of the oil main pipe; The distributor is connected with a first oil delivery branch pipe and a second oil delivery branch pipe, and the first oil delivery branch pipe and the second oil delivery branch pipe are respectively provided with a first blockage sensor and a second blockage sensor; The first oil delivery branch pipe is connected to a first return pipe, the output end of the first return pipe is connected to a lubricating oil tank, and the first electric valve and the first return pump are sequentially arranged on the first return pipe along the delivery direction; The second oil delivery branch pipe is connected with a second return pipe, the output end of the second return pipe is connected with a lubricating oil tank, and the second electric valve and the second return pump are sequentially arranged on the second return pipe along the delivery direction.

2. The centralized lubrication system for wind turbine generator set according to claim 1, characterized in that: A third electric valve is arranged on the oil delivery main pipe.

3. The centralized lubrication system for wind turbine generator set according to claim 1, characterized in that: A supplementary pipeline is arranged on the top of the lubricating oil tank, and a fourth electric valve is arranged on the supplementary pipeline.

4. The centralized lubrication system for wind turbine generator set according to claim 1, characterized in that: A temperature sensor and a liquid level sensor are arranged at the bottom of the lubricating oil tank, and a heating wire is wound around the lubricating oil tank.

5. The centralized lubrication system for wind turbine generator set according to claim 1, characterized in that: A hydraulic oil cylinder is vertically arranged at the bottom of the lubrication, and a filter screen is fixed on the piston rod of the hydraulic oil cylinder.

Images