External control overflow wind power lubrication cooling system

Abstract

The utility model relates to the technical field of wind power lubricating and cooling systems, and particularly discloses an external control overflow wind power lubricating and cooling system which comprises a gear box, an oil pump assembly, a pressure sensor I, a filtering assembly, a cooling assembly and an external control overflow valve connected with the output end of the filtering assembly, the output end of the cooling assembly and the external control overflow valve are connected with the gearbox. A pipeline is arranged between the oil pump assembly and the filtering assembly; the first pressure sensor is arranged on the pipeline; the external control overflow valve is communicated with the pipeline, and the connecting point is arranged between the filtering assembly and the oil pump assembly. According to the utility model, cold oil can be shunted, a temperature control valve is replaced, and the cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of wind power lubrication and cooling systems, and more specifically, to an externally controlled overflow wind power lubrication and cooling system. Background Art

[0002] The overflow valve in the existing wind power lubrication and cooling system is a direct-acting type, installed at the pump outlet to limit the maximum pressure of the system. When the lubrication system operates in a low-temperature environment, due to the high viscosity of the oil, the flow resistance of components such as pipelines, filter components, and cooling components in the system is large, and the system pressure will increase. When the system pressure exceeds the set value of the overflow valve, the pump outlet overflow valve opens, and the system overflows. The oil fluid flows back to the gearbox through the overflow valve and the overflow pipeline, avoiding damage to the equipment due to system overpressure. However, the oil fluid overflowed from the pump outlet overflow valve does not pass through filtration and directly returns to the gearbox oil tank, and cannot lubricate the lubrication points of the gearbox.

[0003] At the same time, a temperature control valve is provided at the outlet of the filter component in the existing wind power lubrication and cooling system for oil fluid commutation:

[0004] When the oil temperature is relatively low, the cold oil channel of the temperature control valve opens, and the system oil fluid returns to the gearbox through the cold oil channel of the temperature control valve. At this time, no oil fluid or only part of the oil fluid passes through the cooling component and returns to the gearbox, which can effectively reduce the system pressure and avoid system overflow;

[0005] When the oil temperature is relatively high, the cold oil channel of the temperature control valve closes, and the hot oil channel opens. All the oil fluid flows through the cooling component through the hot oil channel of the temperature control valve, and the high-temperature oil fluid is cooled and then flows back to the gearbox, thereby realizing the cooling of the gearbox. The service life of the temperature control valve is relatively short and needs to be replaced every two to three years, with high maintenance costs. Summary of the Utility Model

[0006] The technical problem to be solved by the utility model is to provide an externally controlled overflow wind power lubrication and cooling system;

[0007] The solution adopted by the utility model to solve the technical problem is:

[0008] An externally controlled overflow wind power lubrication and cooling system includes a gearbox, an oil pump assembly, a first pressure sensor, a filter assembly, and a cooling assembly connected in sequence, and an externally controlled overflow valve connected to the output end of the filter assembly; the output end of the cooling assembly and the externally controlled overflow valve are respectively connected to the gearbox;

[0009] A pipeline is provided between the oil pump assembly and the filter assembly; the first pressure sensor is arranged on the pipeline;

[0010] The externally controlled overflow valve is communicated with the pipeline, and the connection point is arranged between the filter assembly and the oil pump assembly.

[0011] In some possible embodiments, it further includes a safety valve communicated with the gearbox, and one end of the safety valve is communicated with a pipeline, and the connection point is arranged between the filtering component and the oil pump component.

[0012] In some possible embodiments, the oil pump component includes a ball valve, an oil suction hose, a gear pump, and a check valve that are communicated in sequence; the ball valve is communicated with the gearbox; the check valve is communicated with the pipeline.

[0013] In some possible embodiments, a connecting pipeline is arranged on the gearbox; the connecting pipeline is respectively connected with the safety valve and the externally controlled overflow valve.

[0014] In some possible embodiments, a pressure sensor II is arranged on the connecting pipeline.

[0015] In some possible embodiments, a cooling return oil pipe is arranged between the cooling component and the connecting pipeline.

[0016] In some possible embodiments, an overflow return oil pipe is arranged between the externally controlled overflow valve and the connecting pipeline.

[0017] In some possible embodiments, the filtering component is a double-precision filter.

[0018] In some possible embodiments, the cooling component includes a fan, a motor drivingly matched with the fan, and a heat dissipation fin plate communicated with the cooling return oil pipe and the filtering component;

[0019] The externally controlled overflow valve is arranged in parallel with the heat dissipation fin plate, and the connection point of the externally controlled overflow valve and the output end of the heat dissipation fin plate is arranged between the cooling return oil pipe and the heat dissipation fin plate, and the other end of the externally controlled overflow valve is connected with the input end of the heat dissipation fin plate.

[0020] In some possible embodiments, the cooling component is an air-cooled cooler or a liquid-cooled cooler.

[0021] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0022] In the present utility model, the control oil port of the externally controlled overflow valve is at the outlet of the gear pump, which can limit the maximum working pressure at the outlet of the gear pump and protect the pump and the motor from being damaged; when the ambient temperature is relatively high, the externally controlled overflow valve can replace the pump outlet safety valve in the prior art to reduce costs;

[0023] When the ambient temperature is low and the system pressure is high, the oil will flow back to the gearbox through the filtering component and then through the externally controlled overflow valve, which is beneficial to quickly open the filtering component and enable the high-precision filter element in the filtering component to be put into work as soon as possible; and the oil is filtered by the filtering component and can directly enter each lubrication point of the gearbox to lubricate or cool the gearbox;

[0024] In the present utility model, the channel where the externally controlled overflow valve is located can replace the cold oil channel of the original temperature control valve to achieve the diversion of cold oil, while reducing the equipment cost; moreover, the externally controlled overflow valve has an extremely long service life and can achieve maintenance-free operation, reducing the maintenance cost.

[0025] Furthermore, in the present utility model, the externally controlled overflow valve can be installed in the air cooler, and at the same time replace the bypass valve in the temperature control valve and the air cooler to achieve the diversion of cold oil and reduce the cost at the same time.

[0026] In addition, when using the present utility model, when the oil temperature rises, the opening pressure of the externally controlled overflow valve remains unchanged and is relatively high. When the oil temperature of the cooler assembly is relatively low and the flow resistance is large, the system will operate at a relatively high pressure, which is beneficial to improving the fluidity of the cooling assembly, and then the cooler assembly can adapt to a lower ambient temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic structural diagram of the present utility model;

[0028] Figure 2 is a schematic structural diagram of the present utility model provided with a safety valve;

[0029] Figure 3 is a schematic structural diagram of a kind of the present utility model;

[0030] Figure 4 is a schematic structural diagram of the present utility model in which the cooling assembly adopts a liquid-cooled cooler;

[0031] Wherein: 1. Gearbox; 2. Oil pump assembly; 21. Ball valve; 22. Suction hose; 23. Gear pump; 24. Check valve; 25. Driving motor; 3. Pipeline; 4. Filter assembly; 41. Pipeline 1; 411. Filter element 1; 412. Filter outlet check valve; 42. Pipeline 2; 421. Filter element 2; 422. Filter bypass valve; 43. Differential pressure switch; 5. Cooling assembly; 51. Fan; 52. Motor; 53. Heat dissipation fin; 54. Plate bypass valve; 55. Cooling return pipe; 56. Liquid-cooled cooler; 6. Externally controlled overflow valve; 61. Overflow return pipe; 7. Pressure sensor 1; 8. Connecting pipeline; 9. Safety valve; 10. Pressure sensor 2. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "linkage", "fixation", etc. shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral body; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. The "first", "second" and similar words mentioned in this application do not indicate any sequence, quantity or importance, but are only used to distinguish different components. Similarly, words such as "a" or "one" do not indicate a quantity limit, but indicate that there is at least one. In the implementation of this application, "and / or" describes the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In the description of the embodiments of this application, unless otherwise stated, the meaning of "a plurality" refers to two or more. For example, a plurality of positioning posts means two or more positioning posts. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0033] The following is a detailed description of the present utility model.

[0034] As Figures 1 - 3 shown:

[0035] An externally controlled overflow wind power lubrication and cooling system includes a gearbox 1, an oil pump assembly 2, a first pressure sensor 7, a filtration assembly 4, a cooling assembly 5, and an externally controlled overflow valve 6 connected in sequence; the cooling assembly 5 is arranged in parallel with the externally controlled overflow valve 6 and is respectively connected to the gearbox 1;

[0036] A pipeline 3 is arranged between the oil pump assembly 2 and the filtration assembly 4; the gearbox 1, the oil pump assembly 2, the pipeline 3, the filtration assembly 4, and the cooling assembly 5 are connected in sequence; the first pressure sensor 7 is arranged on the pipeline 3;

[0037] The control oil port of the externally controlled overflow valve 6 is communicated with the pipeline 3, and the connection point is arranged between the filtration assembly 4 and the oil pump assembly 2.

[0038] When the working pressure of the oil pump assembly 2 is greater than the set value of the externally controlled overflow valve 6, the externally controlled overflow valve 6 opens, and the oil will flow into the gearbox 1 to realize system overflow, and the overflow oil can lubricate or cool the gearbox 1.

[0039] In some possible implementation manners, as Figure 2 , Figure 3 shown, it further includes a safety valve 9 communicated with the gearbox 1, and one end of the safety valve 9 is communicated with the pipeline 3, and the connection point is arranged between the filtration assembly 4 and the oil pump assembly 2.

[0040] A safety valve 9 is provided at the outlet of the oil pump assembly 2. When the outlet pressure of the oil pump assembly 2 reaches the pressure setting value of the safety valve 9, overflow is achieved through the safety valve 9, and the oil returns to the gearbox 1.

[0041] The functions of protecting the system pressure are effectively achieved through the settings of the safety valve 9 and the externally controlled overflow valve 6. Among them, the safety valve 9 is only used in the case where the ambient temperature is extremely low and the oil inside the filter assembly 4 may be completely frozen. At this time, due to the extremely large pressure loss of the filter assembly 4, etc., the externally controlled overflow valve 6 will be unable to control the outlet pressure of the oil pump assembly 2, and only overflow can be carried out through the safety valve 9.

[0042] When the ambient temperature is relatively high and the oil will not be completely frozen, the safety valve 9 can be cancelled, and only the externally controlled overflow valve 6 needs to be retained.

[0043] In some possible embodiments, the oil pump assembly 2 includes a ball valve 21, an oil suction hose 22, a gear pump 23, and a check valve 24 that are connected in sequence; the ball valve 21 is connected to the gearbox 1; the check valve 24 is connected to the pipeline 3.

[0044] Specifically, the gear pump 23 is driven by a drive motor 25 that is drivingly connected to it, sucks oil from the gearbox 1, pressurizes the oil through the gear pump 23, and then supplies the oil to the filter assembly 4 after passing through the check valve 24.

[0045] A pressure sensor 7 is provided on the outlet side of the check valve 24 and on the pipeline 3 for monitoring the pressure of the system.

[0046] An externally controlled overflow valve 6 is installed at the outlet of the filter assembly 4. One end of the externally controlled overflow valve 6 is connected to the pipeline 3, and the connection point is set between the check valve 24 and the filter assembly 4; when the working pressure at the outlet of the gear pump 23 is greater than the setting value of the externally controlled overflow valve 6, the externally controlled overflow valve 6 opens, and the oil flows into the gearbox 1 through the overflow return pipe 61 to achieve system overflow, and the overflow oil can lubricate or cool the gearbox 1.

[0047] In some possible embodiments, a connecting pipeline 8 is provided on the gearbox 1; the connecting pipeline 8 is respectively connected to the safety valve 9 and the externally controlled overflow valve 6.

[0048] In some possible embodiments, a pressure sensor 10 is provided on the connecting pipeline 8.

[0049] In some possible embodiments, a cooling return pipe 55 is provided between the cooling assembly 5 and the connecting pipeline 8.

[0050] In some possible embodiments, an overflow return pipe 61 is provided between the externally controlled overflow valve 6 and the connecting pipeline 8.

[0051] In some possible embodiments, the filtering component 4 is a double-precision filter.

[0052] Specifically, as Figures 1 - 3 shown, the double-precision filter includes a pipeline one 41 provided with a filter element one 411 and a filtering outlet check valve 412, a pipeline two 42 in parallel with the filter element one 411, a filtering bypass valve 422 provided on the pipeline two 42 and the filter element two 421, and a differential pressure switch 43 respectively communicated with the input end and the output end of the filter element one 411;

[0053] Preferably, the filtering precision of the filter element one 411 is higher than that of the filter element two 421;

[0054] One end of the pipeline one 41 is communicated with the pipeline 3, and the other end of the pipeline one 41 is communicated with the externally controlled overflow valve 6 and the cooling component 5.

[0055] In the present utility model, the two ends (input end and output end) of the filter element 411 are connected to the differential pressure switch 43, and the differential pressure between the inlet and the outlet of the double-precision filter is monitored through the differential pressure switch 43; when the differential pressure between the inlet and the outlet of the double-precision filter reaches the differential pressure set value, the differential pressure switch 43 alarms to prompt to replace the filter element.

[0056] An externally controlled overflow valve 6 is installed at the outlet of the double-precision filter, and the externally controlled overflow valve 6 controls the oil source to be connected after the check valve 24; when the working pressure at the outlet of the oil pump assembly is greater than the set value of the externally controlled overflow valve 6, the externally controlled overflow valve 6 opens, and the oil fluid flows into the gearbox 1 through the overflow return oil pipe 61 to realize system overflow, and the overflow oil fluid can lubricate or cool the gearbox 1.

[0057] In some possible embodiments, the cooling component 5 is an air-cooled cooler or a liquid-cooled cooler 56.

[0058] Specifically, as Figure 2 shown, when the cooling component 5 is an air-cooled cooler, the air-cooled cooler includes a fan 51, a motor 52 in transmission cooperation with the fan 51, a heat dissipation fin 53 respectively communicated with the cooling return oil pipe 55 and the pipeline one 41, a cooling bypass pipeline in parallel with the heat dissipation fin 53 and with both ends respectively communicated with the cooling return oil pipe 55 and the pipeline one 41, and a fin bypass valve 54 provided on the cooling bypass pipeline;

[0059] It should be noted that when the oil temperature is relatively high, the motor 52 is started to drive the fan 51 to make the air flow through the heat dissipation fin 53 so as to realize heat dissipation of the oil fluid flowing through the heat dissipation fin 53;

[0060] When the oil temperature is relatively low and the viscosity of the oil is high, it causes a large flow resistance in the cooling component 5. When the flow resistance of the cooling component 5 exceeds the set value of the plate bypass valve 54, the plate bypass valve 54 opens, and the oil flows back to the gearbox 1 through the plate bypass valve 54 and the cooling return pipe 55, thus effectively avoiding excessive pressure in the entire system;

[0061] The plate bypass valve 54 is only used in the case where the environmental temperature is extremely low and the oil inside the heat dissipation plate 53 may be completely frozen; if the environmental temperature is relatively high and the heat dissipation plate 53 will not be completely frozen, it can be cancelled.

[0062] Preferably, as Figure 4 shown, when the cooling component 5 is a liquid-cooled cooler 56, it includes a liquid-cooled plate respectively communicated with the cooling return pipe 55 and the pipeline 41.

[0063] When the cooling component 5 is a liquid-cooled cooler 56, if the liquid temperature in the liquid-cooled cooler 56 is too low, it will cause the oil temperature in the liquid-cooled cooler 56 to be low, the pressure loss will increase, and the system pressure, that is, the pump outlet pressure, will rise. When the pump outlet pressure reaches the set value, the externally controlled overflow valve 6 will open; at this time, the system will maintain a relatively high working pressure to allow as much oil as possible to pass through the liquid-cooled cooler 56 to meet the heat dissipation requirements of the gearbox 1.

[0064] Furthermore, as Figure 3 shown, the cooling component 5 may not be the above-mentioned air-cooled cooler or liquid-cooled cooler 56. Specifically, it includes a fan 51, a motor 52 drivingly engaged with the fan 51, and a heat dissipation plate 53 communicated with the cooling return pipe 55 and the filter assembly 4;

[0065] The externally controlled overflow valve 6 is arranged in parallel with the heat dissipation plate 53, and the connection point of the externally controlled overflow valve 6 with the output end of the heat dissipation plate 53 is arranged between the cooling return pipe 55 and the heat dissipation plate 53, and the other end of the externally controlled overflow valve 6 is connected to the input end of the heat dissipation plate 53;

[0066] With this setting, when the environmental temperature is special, the externally controlled overflow valve 6 replaces the plate bypass valve 54 of the air-cooled cooler, which can further reduce costs.

[0067] A number of nozzles communicated with the connecting pipeline 8 are arranged in the gearbox 1. The oil passing through the overflow return pipe 61 or the cooling return pipe 55 enters the gearbox 1 through the connecting pipeline 8, and the lubrication points are lubricated by the nozzles.

[0068] The present utility model is not limited to the foregoing specific embodiments. The present utility model extends to any new feature or any new combination disclosed in this specification, as well as any new method or process step or any new combination disclosed.

Claims

1. An externally controlled overflow wind power lubrication and cooling system, characterized in that It includes a gearbox, an oil pump assembly, a first pressure sensor, a filtering assembly, and a cooling assembly connected in sequence, and an externally controlled overflow valve connected to the output end of the filtering assembly; the output end of the cooling assembly and the externally controlled overflow valve are respectively connected to the gearbox; A pipeline is provided between the oil pump assembly and the filtering assembly; the first pressure sensor is arranged on the pipeline; The externally controlled overflow valve is communicated with the pipeline, and the connection point is arranged between the filtering assembly and the oil pump assembly.

2. The external control overflow wind power lubrication and cooling system according to claim 1, characterized in that, It further includes a safety valve communicated with the gearbox, and one end of the safety valve is communicated with the pipeline, and the connection point is arranged between the filtering assembly and the oil pump assembly.

3. The external control overflow wind power lubrication and cooling system according to claim 1, characterized in that, The oil pump assembly includes a ball valve, an oil suction hose, a gear pump, and a check valve connected in sequence; the ball valve is communicated with the gearbox; the check valve is communicated with the pipeline.

4. The external control overflow wind power lubrication and cooling system according to claim 1, characterized in that A connecting pipeline is arranged on the gearbox; the connecting pipeline is respectively connected to the safety valve and the externally controlled overflow valve.

5. The external control overflow wind power lubrication and cooling system according to claim 4, characterized in that, A second pressure sensor is arranged on the connecting pipeline.

6. The external control overflow wind power lubrication and cooling system according to claim 4, characterized in that, A cooling return pipe is arranged between the cooling assembly and the connecting pipeline.

7. An externally controlled overflow wind power lubrication and cooling system according to claim 4, characterized in that, An overflow return pipe is arranged between the externally controlled overflow valve and the connecting pipeline.

8. An externally controlled overflow wind power lubrication and cooling system according to any one of claims 1-7, characterized in that, The filtering assembly is a double-precision filter.

9. An externally controlled overflow wind power lubrication and cooling system according to any one of claims 1-6, characterized in that, The cooling assembly includes a fan, a motor in transmission cooperation with the fan, and a heat dissipation fin plate communicated with the cooling return pipe and the filtering assembly; The externally controlled overflow valve is arranged in parallel with the heat dissipation fin plate, and the connection point of the externally controlled overflow valve and the output end of the heat dissipation fin plate is arranged between the cooling return pipe and the heat dissipation fin plate, and the other end of the externally controlled overflow valve is connected to the input end of the heat dissipation fin plate.

10. The external control overflow wind power lubrication and cooling system according to claim 8, characterized in that, The cooling assembly is an air-cooled cooler or a liquid-cooled cooler.

Images