An oil replenishment system for a gearbox

Abstract

The present invention discloses an oil replenishing system for a gearbox, belonging to the technical field of gearbox lubrication systems. The oil replenishing system of the gearbox includes an oil tank, a control valve, a check valve, and an oil pump. The first oil tank is arranged at a high position relative to the gearbox, and the second oil tank is arranged at a low position relative to the gearbox. The first control valve is arranged on the first oil guiding path where the first oil tank is communicated with the first oil inlet, and it is used to control the conduction of the first oil guiding path. The second control valve is arranged on the second oil guiding path where the oil outlet is communicated with the second oil tank, and it is used to control the conduction of the second oil guiding path. The check valve is arranged on the third oil guiding path where the second oil tank is communicated with the second oil inlet, and it is used to control the lubricating oil to flow out from the second oil tank and reach the gearbox through the third oil guiding path. The oil pump is arranged on the third oil guiding path. The oil replenishing system of the gearbox can achieve lubrication of the gearbox under power-off conditions and no-load conditions, thereby avoiding the gear bearings from being in a dry grinding state.

Description

Technical Field

[0001] The present invention relates to the technical field of gearbox lubrication systems, and particularly to an oil replenishment system for a gearbox. Background Art

[0002] With the development of large-megawatt power gearboxes, the traditional oil tank as the lubrication system of the gearbox can no longer meet the requirements of large flow rates. At the same time, in order to improve the operating efficiency of the gearbox, the design of an independent oil tank has emerged, which simplifies the external design of the gearbox and optimizes the pipeline layout. However, the design of the independent oil tank makes there be no oil stored in the gearbox, which is in a dry oil sump state, making it difficult to ensure that the gearbox can still be lubricated under power-off conditions and no-load conditions, and cannot avoid the gear bearings being in a dry grinding state. Summary of the Invention

[0003] The purpose of the present invention is to provide an oil replenishment system for a gearbox, which can achieve lubrication of the gearbox under power-off conditions and no-load conditions, thereby avoiding the gear bearings being in a dry grinding state.

[0004] To achieve this purpose, the present invention adopts the following technical solutions:

[0005] An oil replenishment system for a gearbox, the gearbox has a first oil inlet, a second oil inlet and an oil outlet. The oil replenishment system of the gearbox includes an oil tank, a control valve, a check valve and an oil pump. The oil tank includes a first oil tank and a second oil tank. The first oil tank is arranged at a high position relative to the gearbox, and the second oil tank is arranged at a low position relative to the gearbox. The first oil tank is communicated with the first oil inlet, the second oil tank is communicated with the second oil inlet, and the oil outlet is communicated with the second oil tank. The control valve includes a first control valve and a second control valve. The first control valve is arranged on a first oil guiding path where the first oil tank is communicated with the first oil inlet, and is used to control the conduction of the first oil guiding path; the second control valve is arranged on a second oil guiding path where the oil outlet is communicated with the second oil tank, and is used to control the conduction of the second oil guiding path. The check valve is arranged on a third oil guiding path where the second oil tank is communicated with the second oil inlet, and is used to control the lubricating oil to flow out from the second oil tank through the third oil guiding path to reach the gearbox. The oil pump is arranged on the third oil guiding path.

[0006] Optionally, the first oil tank and the second oil tank are circularly communicated through a fourth oil guiding path and a fifth oil guiding path.

[0007] Optionally, one end of the fourth oil guiding path is connected to the third oil guiding path and is located at the output end of the oil pump, and the other end is connected to the first oil tank.

[0008] Optionally, one end of the fifth oil guiding path is connected to the first oil tank, and the other end is connected to the second oil tank.

[0009] Optionally, a first flow regulating valve is provided on the first oil guiding path between the first oil tank and the gearbox.

[0010] Optionally, a second flow regulating valve is provided on the third oil guiding path between the second oil tank and the gearbox.

[0011] Optionally, the oil replenishing system of the gearbox further includes a detecting device for detecting the oil storage amount of the first oil tank. When the detecting device detects that the hydraulic oil in the first oil tank is lower than a set value, the oil pump is controlled to start.

[0012] Optionally, the detecting device is a pressure detecting device.

[0013] Optionally, both the first control valve and the second control valve are solenoid valves.

[0014] Optionally, the oil replenishing system of the gearbox further includes an overflow valve, and the overflow valve is respectively communicated with the oil pump and the first oil tank.

[0015] Advantages of the present invention over the prior art: Since the first oil tank is arranged at a high position relative to the gearbox, and the second oil tank is arranged at a low position relative to the gearbox, the first control valve is used to control the conduction of the first oil guiding path, the second control valve is used to control the conduction of the second oil guiding path, the one-way valve is used to control the lubricating oil to flow out from the second oil tank and reach the gearbox through the third oil guiding path, and the oil pump is arranged on the third oil guiding path where the second oil tank is communicated with the second oil inlet, lubricating oil can be provided for the gearbox under the electrified working condition, the power-off working condition and the no-load working condition, thereby avoiding the dry grinding state of the gear bearing, and without the need to rely on an additional power device, the structure is simple, and the operation efficiency of the gearbox is improved. Description of the Drawings

[0016] Figure 1 is a schematic relationship diagram of the oil replenishing system of the gearbox under the electrified working condition provided by the specific embodiment of the present invention;

[0017] Figure 2 is a schematic relationship diagram of the oil replenishing system of the gearbox under the power-off working condition provided by the specific embodiment of the present invention;

[0018] Figure 3 is a schematic relationship diagram of the oil replenishing system of the gearbox under the no-load working condition provided by the specific embodiment of the present invention.

[0019] Reference Signs:

[0020] 100. Gearbox; 1. First oil tank; 2. Second oil tank; 3. First control valve; 4. Second control valve; 5. Check valve; 6. Oil pump; 7. First oil guiding path; 8. Second oil guiding path; 9. Third oil guiding path; 10. Fourth oil guiding path; 11. Fifth oil guiding path. Detailed implementation manner

[0021] To make the technical problems solved by the present invention, the technical solutions adopted, and the achieved technical effects clearer, the technical solutions of the present invention will be further described below with reference to the drawings and through specific implementation manners.

[0022] The following refers to Figures 1 to 3 Describe the specific structure of the oil replenishing system of the gearbox according to the embodiments of the present invention.

[0023] As Figures 1 to 3 shown, this embodiment provides an oil replenishing system for a gearbox 100. The gearbox 100 has a first oil inlet, a second oil inlet, and an oil outlet. The oil replenishing system of the gearbox 100 includes an oil tank, a control valve, a check valve 5, and an oil pump 6. The oil tank includes a first oil tank 1 and a second oil tank 2. The first oil tank 1 is arranged at a high position relative to the gearbox 100, and the second oil tank 2 is arranged at a low position relative to the gearbox 100. The first oil tank 1 is communicated with the first oil inlet, the second oil tank 2 is communicated with the second oil inlet, and the oil outlet is communicated with the second oil tank 2. The control valve includes a first control valve 3 and a second control valve 4. The first control valve 3 is arranged on the first oil guiding path 7 where the first oil tank 1 is communicated with the first oil inlet, and it is used to control the conduction of the first oil guiding path 7; the second control valve 4 is arranged on the second oil guiding path 8 where the oil outlet is communicated with the second oil tank 2, and it is used to control the conduction of the second oil guiding path 8. The check valve 5 is arranged on the third oil guiding path 9 where the second oil tank 2 is communicated with the second oil inlet, and it is used to control the lubricating oil to flow out from the second oil tank 2 and reach the gearbox 100 through the third oil guiding path 9. The oil pump 6 is arranged on the third oil guiding path 9 where the second oil tank 2 is communicated with the second oil inlet.

[0024] It should be noted that when the oil replenishing system of the gearbox 100 is in the energized working condition, and the second control valve 4 is in the conducting state and the first control valve 3 is in the closed state, the oil pump 6 sucks the lubricating oil in the second oil tank 2, so that the lubricating oil flows out from the second oil tank 2 and reaches the gearbox 100 through the third oil guiding path 9. At this time, due to the gravity of the lubricating oil in the gearbox 100, it flows back into the second oil tank 2 along the second oil guiding path 8, forming a circulating oil guiding mode. Since the first control valve 3 is in the closed state, the lubricating oil flow in the first oil tank 1 is blocked, and at this time, the second oil tank 2 provides lubricating oil for the gearbox 100.

[0025] Specifically, both the first control valve 3 and the second control valve 4 are closed or opened by elastic pieces, and the elastic pieces are connected to the power controller. It is pre-set that the first control valve 3 is in the closed state under the energized condition, and the elastic force will push open the valve of the first control valve 3 to be in the conducting state under the de-energized condition; similarly, it is pre-set that the second control valve 4 is in the conducting state under the energized condition, and the elastic piece will push the valve of the second control valve 4 to be in the closed state under the de-energized condition.

[0026] When the oil replenishing system of the gearbox 100 is in the de-energized condition, since the power is cut off and the first control valve 3 and the second control valve 4 cannot be controlled to be closed or opened, at this time the first control valve 3 is in the conducting state, and the oil pump 6 cannot continue to suck the lubricating oil in the second oil tank 2. Since the first oil tank 1 is at a higher position relative to the gearbox 100, the lubricating oil in the first oil tank 1 flows into the gearbox 100 along the first oil guiding path 7 from top to bottom according to the action of gravity. At this time, the first oil tank 1 provides lubricating oil for the gearbox 100. In addition, since the second control valve 4 is in the closed state, the lubricating oil of the gearbox 100 cannot reach the second oil tank 2 through the second oil guiding path 8, and the lubricating oil gradually accumulates in the gearbox 100.

[0027] It should be supplemented that the one-way valve 5 ensures that under the de-energized condition, the lubricating oil in the first oil tank 1 will not flow back reversely into the oil pump 6, ensuring that the lubricating oil in the first oil tank 1 flows into the gearbox 100.

[0028] When the oil replenishing system of the gearbox 100 is in the no-load condition, all the lubricating oil in the first oil tank 1 flows into the gearbox 100, and the oil level of the gearbox 100 can achieve splash lubrication, thus meeting the lubrication requirements of the gearbox 100 under the no-load condition.

[0029] In summary, the first oil tank 1 serves as an oil replenishing device in case of emergency, and the second oil tank 2 serves as an oil replenishing device under normal working conditions. Under the energized condition, since the second oil tank 2 is at a lower position relative to the gearbox 100, the gearbox 100 does not store lubricating oil, and the gearbox 100 is a dry oil sump, ensuring the operation efficiency; under the de-energized condition and the no-load condition, the first oil tank 1 provides lubricating oil for the gearbox 100, and the gearbox 100 is an oil storage sump, which can provide lubrication to avoid dry friction. Therefore, the oil replenishing system of the gearbox 100 of the present invention can provide lubricating oil for the gearbox 100 under the energized condition, the de-energized condition and the no-load condition, thus avoiding the gear bearings from being in a dry grinding state, and without the need to rely on an additional power device, with a simple structure and improved operation efficiency of the gearbox 100.

[0030] Optionally, as Figures 1 to 3As shown, the first fuel tank 1 and the second fuel tank 2 are connected in a circulating manner through the fourth oil guiding path 10 and the fifth oil guiding path 11. It should be noted that when the oil replenishing system of the gearbox 100 is in the energized condition, on the one hand, the second fuel tank 2 normally supplies lubricating oil to the gearbox 100, and on the other hand, the lubricating oil in the second fuel tank 2 flows into the first fuel tank 1 through the fourth oil guiding path 10, and the lubricating oil in the first fuel tank 1 also flows into the second fuel tank 2 through the fifth oil guiding path 11, forming a cycle.

[0031] Optionally, as Figures 1 to 3 shown, one end of the fourth oil guiding path 10 is connected to the third oil guiding path 9 and is located at the output end of the oil pump 6, and the other end is connected to the first fuel tank 1. It should be noted that since the fourth oil guiding path 10 is located at the output end of the oil pump 6, when the oil replenishing system of the gearbox 100 is in the energized condition, the oil pump 6 sucks the lubricating oil from the second fuel tank 2 and flows along the third oil guiding path 9 and the fourth oil guiding path 10 until it reaches the first fuel tank 1, facilitating the lubricating oil circulation between the first fuel tank 1 and the second fuel tank 2.

[0032] Optionally, as Figures 1 to 3 shown, one end of the fifth oil guiding path 11 is connected to the first fuel tank 1, and the other end is connected to the second fuel tank 2. It can be understood that the fifth oil guiding path 11 effectively connects the first fuel tank 1 and the second fuel tank 2, facilitating the circulating oil guiding.

[0033] Optionally, a first flow regulating valve is provided on the first oil guiding path 7 between the first fuel tank 1 and the gearbox 100. It can be understood that since a first flow regulating valve is provided between the first fuel tank 1 and the gearbox 100, it is convenient to adjust the flow rate of the lubricating oil flowing in the first fuel tank 1 to adapt to the change in the demand for lubricating oil in the gearbox 100.

[0034] Optionally, a second flow regulating valve is provided on the third oil guiding path 9 between the second fuel tank 2 and the gearbox 100. It can be understood that since a second flow regulating valve is provided between the second fuel tank 2 and the gearbox 100, it is convenient to adjust the flow rate of the lubricating oil flowing in the second fuel tank 2 to adapt to the change in the demand for lubricating oil in the gearbox 100.

[0035] Optionally, the oil replenishing system of the gearbox 100 further includes a detection device for detecting the oil storage amount of the first fuel tank 1. When the detection device detects that the hydraulic oil in the first fuel tank 1 is lower than the set value, the oil pump 6 is controlled to start, and the lubricating oil in the second fuel tank 2 is introduced into the first fuel tank 1 through the fourth oil guiding path 10 until it gradually reaches the predetermined value of the first fuel tank 1.

[0036] Specifically, the height of the oil port in the first oil tank 1 is set for the hydraulic oil. When the lubricating oil in the first oil tank 1 exceeds the preset value, the excess lubricating oil will flow from the fifth oil guiding path 11 to the second oil tank 2, ensuring circulation after reaching the preset value, so that the liquid level height will not rise, and also ensuring the cleanliness and temperature of the oil fluid.

[0037] Optionally, the detection device is a pressure detection device. Of course, in other embodiments of the present invention, the detection device can also be formed as a liquid level detection device, etc.

[0038] Optionally, both the first control valve 3 and the second control valve 4 are solenoid valves.

[0039] Optionally, the oil replenishing system of the gearbox 100 further includes an overflow valve, and the overflow valve is respectively connected to the oil pump 6 and the first oil tank 1. The overflow valve can ensure the stability when the pressure of the oil pump 6 is too high.

[0040] As an alternative implementation, the fourth oil guiding path 10 does not need to be connected to the third oil guiding path 9, but directly communicates the first oil tank 1 and the second oil tank 2. At the same time, one end of the fifth oil guiding path 11 is connected to the first oil tank 1, and the other end is connected to the second oil tank 2. A circulation pump and a switching valve are provided on the fourth oil guiding path 10 to realize the circulation of the lubricating oil between the first oil tank 1 and the second oil tank 2.

[0041] In the description of this specification, the descriptions referring to terms such as "some embodiments", "other embodiments", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0042] In addition, it should be understood that the orientation or positional relationships indicated by terms such as "upper", "lower", "inner", "outer", "vertical", "horizontal", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present invention.

[0043] In the present invention, unless otherwise clearly specified and defined, terms such as "connected", "joined", "installed", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] In addition, features defined as "first", "second" may explicitly or implicitly include one or more of such features, which are used to distinguish and describe features, without order or importance. In the description of the present invention, unless otherwise stated, the meaning of "a plurality" is two or more.

[0045] The above content is only a preferred embodiment of the present invention. For those of ordinary skill in the art, based on the idea of the present invention, there will be changes in the specific implementation manners and application scopes. The content of this specification should not be construed as a limitation to the present invention.

Claims

1. An oil replenishment system for a gearbox, the gearbox (100) having a first oil inlet, a second oil inlet and an oil outlet, characterized in that, The oil replenishment system of the gearbox (100) includes: An oil tank, which includes a first oil tank (1) and a second oil tank (2). The first oil tank (1) is arranged at a high position relative to the gearbox (100), and the second oil tank (2) is arranged at a low position relative to the gearbox (100). The first oil tank (1) is communicated with the first oil inlet, the second oil tank (2) is communicated with the second oil inlet, and the oil outlet is communicated with the second oil tank (2); Control valves, which include a first control valve (3) and a second control valve (4). The first control valve (3) is arranged on a first oil guiding path (7) where the first oil tank (1) is communicated with the first oil inlet, and is used to control the conduction of the first oil guiding path (7); the second control valve (4) is arranged on a second oil guiding path (8) where the oil outlet is communicated with the second oil tank (2), and is used to control the conduction of the second oil guiding path (8); A one-way valve (5), which is arranged on a third oil guiding path (9) where the second oil tank (2) is communicated with the second oil inlet, and is used to control the lubricating oil to flow out from the second oil tank (2) through the third oil guiding path (9) to reach the gearbox (100); An oil pump (6), which is arranged on the third oil guiding path (9); The first oil tank (1) is an oil replenishment device in case of emergency. The second oil tank (2) serves as an oil replenishment device under normal working conditions. When powered on, the gearbox (100) does not store lubricating oil, and the gearbox (100) is a dry oil sump. Under power-off conditions and no-load conditions, the first oil tank 1 provides lubricating oil for the gearbox 100, and the gearbox 100 is an oil storage sump; Both the first control valve (3) and the second control valve (4) are solenoid valves; The first oil tank (1) and the second oil tank (2) are circularly communicated through a fourth oil guiding path (10) and a fifth oil guiding path (11); One end of the fourth oil guiding path (10) is connected to the third oil guiding path (9) and is located at the output end of the oil pump (6), and the other end is connected to the first oil tank (1); It further includes a detection device for detecting the oil storage amount of the first oil tank (1). When the detection device detects that the hydraulic oil in the first oil tank (1) is lower than the set value, it controls the oil pump (6) to start. The detection device is a pressure detection device.

2. The oil replenishment system for the gearbox according to claim 1, characterized in that, One end of the fifth oil guiding path (11) is connected to the first oil tank (1), and the other end is connected to the second oil tank (2).

3. The oil replenishing system of the gearbox (100) according to claim 1, characterized in that, A first flow regulating valve is arranged on the first oil guiding path (7) between the first oil tank (1) and the gearbox (100).

4. The oil replenishment system of the gearbox according to claim 1, characterized in that A second flow regulating valve is arranged on the third oil guiding path (9) between the second oil tank (2) and the gearbox (100).

5. The oil replenishment system of the gearbox according to claim 1, characterized in that, It further includes an overflow valve, and the overflow valve is respectively communicated with the oil pump (6) and the first oil tank (1).

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