Distributed wind generating set lubricating system

Abstract

The utility model discloses a distributed wind generating set lubricating system which is characterized in that a grease storage unit is close to a corresponding grease injection point, hydraulic oil provided by a pump module is used as driving force, and lubricating grease in the grease storage unit is injected into the grease injection point; the condition that lubricating grease flows in a long pipeline in a traditional centralized lubrication system is changed, the risk of blockage does not exist any more, in addition, a distributed structure is adopted, the grease storage units correspond to the grease injection points one to one, it is guaranteed that grease injection of other grease injection points cannot be affected when any grease injection point is blocked, the defects of traditional centralized lubrication are overcome, and the service life of the system is prolonged. And as long as the main pipeline or the main distributor is blocked, the system cannot operate. And in addition, the lubricating grease is injected into all grease injection points in the mode that the lubricating grease is pushed by hydraulic oil, and the problem that the system cannot operate due to the fact that air exists in the lubricating grease is solved. And the pressure sensors are used for monitoring the pressure of the corresponding pumping units, so that which grease injection point is blocked can be quickly checked.

Description

Technical Field

[0001] The utility model relates to the technical field of wind power generation, in particular to a distributed wind power generator set lubrication system. Background Art

[0002] The existing centralized lubrication system of wind turbine generator sets mainly consists of centralized lubrication pumps, distributors, pipelines and other components. Its function is to pressurize and transport lubricating grease to distributors at all levels through centralized lubrication pumps, and then distributors at all levels transport lubricating grease to each bearing or the grease injection point of the required lubricated parts through pipelines to lubricate the friction pairs inside the parts. However, the centralized lubrication pump is essentially a radial piston pump with poor self-priming ability, and the lubricating grease itself has high viscosity and poor fluidity. This results in that if there are cavities in the lubricating grease, the centralized lubrication pump cannot normally supply the lubricating grease to the distributor and subsequent pipelines through grease suction and discharge, resulting in frequent failures of the lubrication system. In addition, there is a segregation phenomenon in the lubricating grease. When the lubricating grease is finally supplied from the lubricating pump to the parts that need to be lubricated, it has to pass through a very long pipeline and distributors at all levels. Due to the large resistance and pressure difference during the flow process, the base oil in the lubricating grease is slowly precipitated during the flow process and enters the bearing in advance. Due to the loss of base oil, the lubricating grease inside the pipeline and distributor has too many soap bases, which eventually leads to the grease blockage of the pipeline and distributor, thereby affecting the stable operation of the lubrication system. Summary of the invention

[0003] The utility model aims to overcome the deficiencies of the prior art and provide a distributed wind turbine generator set lubrication system.

[0004] In order to achieve the above purpose, the technical solution provided by the utility model is:

[0005] A distributed wind turbine generator set lubrication system includes a plurality of grease storage units storing lubricating grease, a grease injection module for injecting lubricating grease into the grease storage units, and a pump module for providing hydraulic oil to the grease storage units;

[0006] The grease storage unit corresponds to the grease injection points one by one and is close to the corresponding grease injection points; a piston is provided in the grease storage unit, and the piston divides the interior of the grease storage unit into a lubricating grease cavity for storing lubricating grease and a hydraulic oil cavity for hydraulic oil to enter;

[0007] The pump module is in communication with the hydraulic oil chambers of a plurality of fat storage units;

[0008] The grease injection module is arranged between the lubricating grease cavities of a plurality of grease storage units and the corresponding grease injection points.

[0009] In this technical solution, the grease storage unit is close to the corresponding grease injection point, and the hydraulic oil provided by the pump module is used as the driving force to inject the lubricating grease in the grease storage unit into the grease injection point, which changes the traditional situation of the lubricating grease flowing in the long pipeline, and there is no longer a risk of blockage. Moreover, the distributed structure is adopted, and the grease storage unit corresponds to the grease injection point one by one, ensuring that the blockage of any grease injection point will not affect the grease injection of other grease injection points, avoiding the disadvantages of traditional centralized lubrication. As long as the main pipeline or main distributor is blocked, the system will not be able to operate. In addition, the lubricating grease is injected into each grease injection point by using hydraulic oil to push the lubricating grease, eliminating the problem of the system not being able to operate due to the presence of air in the lubricating grease.

[0010] Further, the pump module includes a closed oil tank and a plurality of pumping units;

[0011] A plurality of fat storage units are divided into a plurality of fat storage unit groups, and similar fat storage units are grouped together;

[0012] A plurality of pumping units are connected between the closed oil tank and the corresponding fat storage unit group, and respectively transport the hydraulic oil in the closed oil tank to the hydraulic oil chambers of the fat storage units of the corresponding fat storage unit group.

[0013] In the technical solution, the pump module includes a closed oil tank, and hydraulic oil is added into the closed oil tank, which changes the phenomenon that the traditional centralized lubrication system directly adds lubricating grease into the oil tank and entrains air.

[0014] Furthermore, the pumping unit comprises a pump core, a first one-way valve, and an oil inlet solenoid valve, and the pump core, the first one-way valve, and the oil inlet solenoid valve are sequentially arranged on a pipeline between the closed oil tank and the corresponding fat storage unit.

[0015] Furthermore, the pump module further comprises an overflow unit, which is connected to pipelines between the first one-way valve and the oil inlet solenoid valve in the plurality of fat storage units.

[0016] In the technical solution, when the lubricating grease in the grease storage unit is consumed, the excess hydraulic oil drawn from the closed oil tank by the pump core can be easily overflowed back into the closed oil tank through the overflow unit.

[0017] Further, the overflow unit includes a hydraulic oil overflow valve and a plurality of second one-way valves;

[0018] One end of the second one-way valve is communicated with the hydraulic oil overflow valve, and the other end is communicated with a pipeline between the corresponding first one-way valve and the oil inlet solenoid valve.

[0019] Furthermore, the pump module further comprises a unloading solenoid valve, which is connected to pipelines between the first one-way valve and the oil inlet solenoid valve in the plurality of pumping units.

[0020] In this technical solution, as the lubricating grease cavity of the grease storage unit is gradually replenished with lubricating grease, excess hydraulic oil in the hydraulic oil cavity of the grease storage unit flows back to the closed oil tank through the unloading solenoid valve.

[0021] Furthermore, the pump module also includes a plurality of pressure sensors, which are connected to pipelines between the oil inlet solenoid valves in the corresponding fat storage units and the corresponding fat storage unit groups.

[0022] In this technical solution, the pressure of the corresponding pumping unit is monitored by a pressure sensor, so that it is possible to quickly find out which grease injection point is blocked.

[0023] Furthermore, the grease injection module includes a plurality of grease injection valves, which correspond to the grease storage units one by one and are arranged between the lubricating grease cavity of the corresponding grease storage unit and the corresponding grease injection point.

[0024] Furthermore, the grease injection module also includes a system grease injection port, which is connected to a plurality of grease injection valves through pipelines.

[0025] Furthermore, the grease injection module also includes a grease injection overflow valve, which is connected to the plurality of grease injection valves through pipelines.

[0026] Compared with the prior art, the principles and advantages of this technical solution are as follows:

[0027] 1. The grease storage unit is close to the corresponding grease injection point, and the hydraulic oil provided by the pump module is used as the driving force to inject the lubricating grease in the grease storage unit into the grease injection point, which changes the traditional situation of grease flowing in a long pipeline, and there is no risk of blockage. Moreover, the distributed structure is adopted, and the grease storage unit corresponds to the grease injection point one by one, ensuring that the blockage of any grease injection point will not affect the grease injection of other grease injection points, avoiding the disadvantages of traditional centralized lubrication. As long as the main pipeline or main distributor is blocked, the system will not be able to operate. In addition, the lubricating grease is injected into each grease injection point by using hydraulic oil to push the lubricating grease, which solves the problem that the system cannot operate due to the presence of air in the lubricating grease.

[0028] 2. The pump module includes several pressure sensors, which are connected to the pipelines between the oil inlet solenoid valves in the corresponding fat storage units and the corresponding fat storage unit groups. The pressure of the corresponding pumping unit is monitored by the pressure sensors, so that it is possible to quickly find out which fat injection point is blocked. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the services required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 This is a schematic structural diagram of a distributed wind turbine lubrication system of the utility model (A is a bearing).

[0031] Reference numerals:

[0032] 1- Grease storage unit; 2- Pump module; 3- Closed oil tank; 4- Pump core; 5- First one-way valve; 6- Oil inlet solenoid valve; 7- Hydraulic oil overflow valve; 8- Second one-way valve; 9- Unloading solenoid valve; 10- Pressure sensor; 11- Grease injection valve; 12- System grease injection port; 13- Grease injection overflow valve. DETAILED DESCRIPTION

[0033] The utility model is further described below in conjunction with specific implementation methods:

[0034] The distributed wind turbine generator set lubrication system described in this embodiment lubricates the bearings of the wind turbine generator set.

[0035] like Figure 1 As shown, the system includes nine grease storage units 1 storing lubricating grease inside, a grease injection module injecting lubricating grease into the grease storage units 1 , and a pump module 2 providing hydraulic oil to the grease storage units 1 .

[0036] in,

[0037] The nine grease storage units 1 are divided into three grease storage unit 1 groups, and the adjacent grease storage units 1 are grouped together; the grease storage units 1 correspond to the grease injection points one by one and are close to the corresponding grease injection points; a piston is provided in the grease storage unit 1, which divides the interior of the grease storage unit 1 into a grease cavity for storing grease and a hydraulic oil cavity for the hydraulic oil to enter.

[0038] The grease injection module includes nine grease injection valves 11, a system grease injection port 12, and a grease injection overflow valve 13; the grease injection valves 11 correspond to the grease storage units 1 one by one, and are arranged between the lubricating grease cavity of the corresponding grease storage unit 1 and the corresponding grease injection point; the system grease injection port 12 and the grease injection overflow valve 13 are respectively connected to the nine grease injection valves 11 through pipelines.

[0039] The pump module 2 includes a closed oil tank 3, three pumping units, an overflow unit, a unloading solenoid valve 9, and three pressure sensors 10; the three pumping units are connected between the closed oil tank 3 and the corresponding group of fat storage units 1, and the hydraulic oil in the closed oil tank 3 is respectively transported to the hydraulic oil cavity of the fat storage unit 1 of the corresponding group of fat storage units 1.

[0040] Specifically, in this embodiment, the pumping unit includes a pump core 4, a first one-way valve 5, and an oil inlet solenoid valve 6, which are arranged sequentially on the pipeline between the closed oil tank 3 and the corresponding fat storage unit 1.

[0041] The overflow unit includes a hydraulic oil overflow valve 7 and three second one-way valves 8 ; one end of the second one-way valve 8 is connected to the hydraulic oil overflow valve 7 , and the other end is connected to the pipeline between the corresponding first one-way valve 5 and the oil inlet solenoid valve 6 .

[0042] The unloading solenoid valve 9 is communicated with pipelines between the first one-way valve 5 and the oil inlet solenoid valve 6 in the three pumping units.

[0043] The three pressure sensors 10 are respectively connected to the pipelines between the oil inlet solenoid valves 6 in the corresponding fat storage units 1 and the corresponding fat storage unit 1 group.

[0044] The working principle of this embodiment is as follows:

[0045] When you need to grease the bearing:

[0046] Control the unloading solenoid valve 9 and all the oil inlet solenoid valves 6 to switch directions after being energized to prevent the hydraulic oil from flowing back to the closed oil tank 3;

[0047] The three pumping units work simultaneously. In each pumping unit, the pump core 4 pumps the hydraulic oil through the first one-way valve 5 and the oil inlet solenoid valve 6 to the hydraulic oil chamber of the corresponding fat storage unit 1 group;

[0048] The hydraulic oil in the hydraulic oil chamber of the grease storage unit 1 pushes the piston to push the lubricating grease in the lubricating grease chamber out to the grease injection valve 11;

[0049] The lubricating grease flows through the grease injection valve 11 to the bearing grease injection point and enters the interior of the bearing;

[0050] When all the internal grease of a certain grease storage unit 1 group is consumed, the pressure of the pressure sensor 10 corresponding to this passage increases, and an alarm is issued to indicate that the grease of this circuit has been used up;

[0051] The pump core 4 corresponding to the grease storage unit 1 that has consumed all the lubricating grease will continue to operate, pumping the hydraulic oil to the hydraulic oil overflow valve 7 to overflow back to the closed oil tank 3.

[0052] When the grease in any grease storage unit 1 is consumed and grease needs to be injected into the system:

[0053] Control all oil inlet solenoid valves 6 to switch on and off;

[0054] The external grease adding machine is connected to the system grease filling port 12, and the grease adding machine is started to add grease to the grease cavities of all grease storage units 1;

[0055] The lubricating grease enters from the system grease injection port 12 and flows into all the grease injection valves 11 , and the grease injection valves 11 force the lubricating grease to be distributed into the lubricating grease chambers of the corresponding grease storage units 1 .

[0056] As the grease storage unit 1 is gradually replenished with lubricating grease, the piston is pushed to move in the opposite direction, and the internal hydraulic oil is pushed out from the hydraulic oil cavity of the grease storage unit 1;

[0057] After the hydraulic oil flows out of the hydraulic oil cavity of the oil storage unit 1, it passes through the corresponding oil inlet solenoid valve 6, and then passes through the unloading solenoid valve 9 and flows through the closed oil tank 3;

[0058] When the grease cavities of all the grease storage units 1 are filled with grease, when the external grease adding machine continues to add grease, the excess grease will flow out from the grease filling overflow valve 13, and the grease adding is stopped at this time, and the grease adding is completed.

[0059] In this embodiment, the grease storage unit 1 is close to the corresponding grease injection point, and the hydraulic oil provided by the pump module 2 is used as a driving force to inject the lubricating grease in the grease storage unit 1 into the grease injection point, which changes the traditional situation of the lubricating grease flowing in a long pipeline, and there is no longer a risk of blockage. Moreover, the distributed structure is adopted, and the grease storage unit 1 corresponds to the grease injection point one by one, ensuring that the blockage of any grease injection point will not affect the grease injection of other grease injection points, avoiding the disadvantages of traditional centralized lubrication. As long as the main pipeline or main distributor is blocked, the system will not be able to operate. In addition, the lubricating grease is injected into each grease injection point by using hydraulic oil to push the lubricating grease, which solves the problem that the system cannot operate due to the presence of air in the lubricating grease.

[0060] The pump module 2 includes three pressure sensors 10, which are connected to the pipeline between the oil inlet solenoid valve 6 in the corresponding fat storage unit 1 and the corresponding fat storage unit 1 group. The pressure of the corresponding pumping unit is monitored by the pressure sensor 10, so that it is possible to quickly check which grease injection point is blocked.

[0061] The embodiments described above are only preferred embodiments of the present invention, and are not intended to limit the scope of implementation of the present invention. Therefore, all changes made based on the shape and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A distributed wind turbine lubrication system, characterized in that: It includes several grease storage units storing lubricating grease inside, a grease injection module for injecting lubricating grease into the grease storage units, and a pump module for providing hydraulic oil to the grease storage units; The grease storage unit corresponds to the grease injection points one by one and is close to the corresponding grease injection points; a piston is provided in the grease storage unit, and the piston divides the interior of the grease storage unit into a lubricating grease cavity for storing lubricating grease and a hydraulic oil cavity for hydraulic oil to enter; The pump module is in communication with the hydraulic oil chambers of a plurality of fat storage units; The grease injection module is arranged between the lubricating grease cavities of a plurality of grease storage units and the corresponding grease injection points.

2. A distributed wind turbine generator set lubrication system according to claim 1, characterized in that: The pump module includes a closed oil tank and a plurality of pumping units; A plurality of fat storage units are divided into a plurality of fat storage unit groups, and similar fat storage units are grouped together; A plurality of pumping units are connected between the closed oil tank and the corresponding fat storage unit group, and respectively transport the hydraulic oil in the closed oil tank to the hydraulic oil chambers of the fat storage units of the corresponding fat storage unit group.

3. A distributed wind turbine generator set lubrication system according to claim 2, characterized in that: The pumping unit comprises a pump core, a first one-way valve and an oil inlet solenoid valve, which are arranged sequentially on a pipeline between a closed oil tank and a corresponding fat storage unit.

4. A distributed wind turbine generator set lubrication system according to claim 3, characterized in that: The pump module further comprises an overflow unit, which is communicated with pipelines between the first one-way valve and the oil inlet solenoid valve in the plurality of fat storage units.

5. A distributed wind turbine generator set lubrication system according to claim 4, characterized in that: The overflow unit includes a hydraulic oil overflow valve and a plurality of second one-way valves; One end of the second one-way valve is communicated with the hydraulic oil overflow valve, and the other end is communicated with a pipeline between the corresponding first one-way valve and the oil inlet solenoid valve.

6. A distributed wind turbine generator set lubrication system according to claim 5, characterized in that: The pump module further comprises a unloading solenoid valve, which is communicated with pipelines between the first one-way valve and the oil inlet solenoid valve in the plurality of pumping units.

7. A distributed wind turbine generator set lubrication system according to claim 5, characterized in that: The pump module further comprises a plurality of pressure sensors, which are connected to pipelines between the oil inlet solenoid valves in the corresponding fat storage units and the corresponding fat storage unit groups.

8. A distributed wind turbine generator set lubrication system according to any one of claims 1 to 7, characterized in that: The grease injection module comprises a plurality of grease injection valves, which correspond to the grease storage units one by one and are arranged between the lubricating grease cavity of the corresponding grease storage unit and the corresponding grease injection point.

9. A distributed wind turbine generator set lubrication system according to claim 8, characterized in that: The grease injection module also includes a system grease injection port, which is communicated with a plurality of grease injection valves through pipelines.

10. A distributed wind turbine generator set lubrication system according to claim 9, characterized in that: The grease injection module also includes a grease injection overflow valve, which is connected to a plurality of grease injection valves through pipelines.

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