Oil supply system and control method thereof

Abstract

According to the oil supply system and the control method thereof, before a gear box is started, a control module conducts primary distribution on oil flowing through a main oil duct and a control oil duct according to information of the working condition that the gear box is about to operate; after the gear box runs, the electromagnetic throttle valve is opened to an initial state, oil passes through the main oil duct and then is conveyed to all bearings on the gear box from the branch oil ducts, and the oil passes through the temperature control oil duct and then is conveyed to all the bearings on the gear box; after the gear box runs to a calibrated working condition, when the temperature of each bearing tends to be stable and is below the highest set temperature, the control module reduces the opening degree of the throttling electromagnetic valve corresponding to the low-temperature bearing, and the control module increases the opening degree of the throttling electromagnetic valve corresponding to the high-temperature bearing; and the temperature difference of bearings on the gearbox is reduced. By means of the arrangement, all the electromagnetic throttle valves and the two branch oil stations can be controlled, the amount of oil flowing through all the bearings and the oil pressure in the main oil duct and the oil control duct are dynamically adjusted, and the reliability of the gearbox is guaranteed.

Description

Technical Field

[0001] The invention relates to the field of gear box thermal balance control, and in particular to an oil supply system and a control method thereof. Background Art

[0002] In the use of multi-axis high-speed gearboxes, not all axes are in a loaded state. Whether they are loaded or not has a great impact on the amount of oil required for the corresponding bearings and gear meshing. The gearbox has different oil requirements under different working conditions. Generally speaking, the oil volume designed and calculated for multi-axis high-speed gearboxes is calculated and allocated according to the maximum oil volume under the corresponding bearing loading conditions. However, this results in a surplus of oil during the overall operation of the gearbox, which leads to energy loss. Due to the different actual speeds and loads of each bearing, this also leads to different temperatures of each bearing, resulting in reduced efficiency and life of the gearbox. Summary of the invention

[0003] In order to solve the problem in the prior art that the temperature of each point in the gearbox is uneven due to the consistent oil amount at each bearing of the gearbox, resulting in energy loss in the gearbox, the purpose of the present invention is to provide an oil supply system and a control method thereof. This scheme can adaptively adjust the working conditions of the gearbox at different stages, can independently control the oil supply to any bearing, and then can adjust the thermal balance of the gearbox to improve the efficiency of the gearbox.

[0004] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions: a control method for controlling the oil supply system of a gearbox, in which a transmission shaft is mounted on a gearbox body through a bearing, and a plurality of transmission shafts are connected through gear transmission; The oil supply system includes a control module, a main oil passage, a plurality of branch oil passages and a plurality of oil control passages; wherein the oil is diverted to each bearing on the gearbox by the plurality of branch oil passages after passing through the main oil passage; the plurality of oil control passages correspond to the plurality of bearings on the gearbox one by one, and the oil can directly flow to the bearings through the oil control passages to realize oil supply, and an electromagnetic throttle valve is installed on the oil control passage; the control module can collect the bearing temperature and control the opening of the electromagnetic throttle valve; The specific control methods are as follows: Step 1) Before the gearbox is started, the control module performs primary distribution of the oil flowing through the main oil channel and the control oil channel according to the operating condition information of the gearbox to be operated; Step 2) After the gearbox is running, the electromagnetic throttle valve is opened to the initial state, the oil passes through the main oil channel and is sent to each bearing on the gearbox from the branch oil channel, and the oil passes through the temperature control oil channel and is sent to each bearing on the gearbox; Step 3) After the gearbox runs to the calibrated operating condition, when the temperature of each bearing tends to be stable and the temperature of each bearing is at the highest set temperature, the control module then reduces the opening of the throttle solenoid valve corresponding to the low-temperature bearing, and increases the opening of the throttle solenoid valve corresponding to the high-temperature bearing, thereby reducing the temperature difference of each bearing on the gearbox.

[0005] Preferably, the oil supply system further includes an oil distribution station A and an oil distribution station B, wherein the oil distribution station A supplies oil to the main oil channel, and the oil distribution station B supplies oil to the oil control channel.

[0006] Preferably, the oil volume distributed by distribution station A accounts for 70-80% of the total oil volume, and the oil volume distributed by distribution station B accounts for 20-30% of the total oil volume.

[0007] Preferably, in the above step 2), the initial opening of the electromagnetic throttle valve is 1 / 2 of its maximum stroke.

[0008] Preferably, in the above step 2), if the temperature of a bearing is higher than the set temperature, the opening of the throttling solenoid valve corresponding to the high-temperature bearing is increased.

[0009] Preferably, in the above step 2), if the temperature of a bearing is higher than the set temperature and has a large temperature difference with other bearings, the opening of the throttle valve corresponding to the bearing is reduced.

[0010] Preferably, the temperature-control oil passage is connected to the oil distribution passage, and in the above steps 2) and 3), the oil is delivered to the oil distribution passage through the temperature-control oil passage.

[0011] Preferably, a check valve is installed on the oil distribution channel, and the check valve is arranged between the inlet of the oil distribution channel and the outlet of the temperature control oil channel.

[0012] An oil supply system can utilize the above control method.

[0013] The beneficial effects of the technical solution of the present invention are as follows: when the gearbox is started, multiple unified electromagnetic throttle valves are opened to increase the oil flowing through the bearings, provide sufficient lubrication to the bearings, and ensure that the heat dissipation requirements of the gearbox from startup to operation to calibration are met. At the same time, the state of each bearing can be manifested in this process through temperature; after the gearbox runs to the calibrated state, the opening of each electromagnetic throttle valve is dynamically controlled by the gear temperature, and the amount of oil flowing through each bearing is dynamically adjusted, so that the temperatures of each bearing of the gearbox tend to be consistent, thereby ensuring the stability and reliability of the gearbox operation process, realizing instant oil distribution and supply to the gearbox, and adjusting the thermal balance of the gearbox to improve the efficiency of the gearbox; and in the above scheme, the oil pressure in the main oil channel and the oil control oil channel can be controlled respectively by two oil distribution stations, further improving the dynamic adjustment capability of the gearbox under various working conditions and working states. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural diagram of the oil supply system; Figure 2 This is the control logic diagram of the oil supply system.

[0015] Figure numerals: 1. Oil distribution station A; 2. Oil distribution station B; 3. Main oil channel; 4. Oil distribution channel; 5. Bearing; 6. Check valve; 7. Pressure gauge; 8. Temperature control oil channel; 9. Solenoid throttle valve; 10. Nozzle; 11. Oil return port; 12. Oil pool. DETAILED DESCRIPTION

[0016] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0017] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0018] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more, unless otherwise clearly specified.

[0019] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0020] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature. Example

[0021] like Figure 1 The oil supply system shown is used to supply oil to a gearbox. The gearbox includes a housing, a transmission shaft, a gear and a bearing 5. The gear is mounted on the transmission shaft. The transmission shaft is rotatably mounted on the housing through the bearing 5. The oil supply system includes an oil distribution station A1, an oil distribution station B2, a main oil passage 3 and a plurality of oil distribution passages 4; wherein the main oil passage 3 is connected through the oil distribution passages 4, and the plurality of oil distribution passages 4 are respectively arranged at a plurality of bearings 5 ​​of the housing, and the oil can flow through the bearings 5 ​​through the oil distribution passages 4 and then enter the oil pool 12 at the bottom of the housing; a nozzle for spraying oil on the gears is also installed in the housing; Among them, the oil distribution station A1 can drive the oil through the main oil channel 3 and then be distributed to multiple bearings 5 ​​on the gearbox through multiple oil distribution channels 4. The oil distribution station A1 can drive the oil through the nozzle 10 to spray the oil on the gear; the oil distribution station B2 can directly deliver the oil to any one or multiple bearings 5 ​​on the gearbox, thereby changing the oil supply amount of the specified bearing 5.

[0022] With such arrangement, the system feeds back and controls the temperature of the bearing 5 and the mechanical efficiency of the gearbox according to the working condition of the gearbox, so that the gearbox can instantly distribute oil supply while meeting the conditions of gear lubrication, bearing 5 lubrication and cooling, and adjust the thermal balance of the transmission shaft, gears and bearing 5 in the gear phase, thereby further improving the service life of the gearbox, providing stability of the gearbox, and improving the mechanical efficiency of the gearbox.

[0023] In this embodiment, the box body is provided with an oil return port 11 connected to the oil pool 12, and the oil distribution station A1 and the oil distribution station B2 can extract the oil in the box body from the oil return port 11. Such a configuration can realize oil circulation and improve the stability of oil supply.

[0024] In this embodiment, the gearbox also includes multiple temperature-controlled oil passages 8, which correspond one-to-one to multiple oil distribution passages 4, and the temperature-controlled oil passages 8 are connected to the oil distribution passages 4; the oil distribution station B2 can deliver oil to the oil distribution passages 4 through the temperature-controlled oil passages 8.

[0025] Further preferably, an electromagnetic throttle valve 9 is installed on the temperature control oil channel 8, and the electromagnetic throttle valve 9 is electrically connected to the oil supply system; a check valve 6 is installed on the oil distribution channel 4, and the check valve 6 is arranged between the inlet of the oil distribution channel 4 and the outlet of the temperature control oil channel 8.

[0026] In this embodiment, a pressure gauge 7 for measuring oil pressure is installed on the oil distribution channel 4 . The pressure gauge 7 is electrically connected to the oil supply system. The pressure gauge 7 is arranged between the outlet of the temperature control oil channel 8 and the bearing 5 .

[0027] In this embodiment, flow meters for measuring the oil volume are installed on the oil distribution channel 4 and the nozzle 10 . The flow meters are electrically connected to the oil supply system and are arranged between the outlet of the temperature control oil channel 8 and the bearing 5 .

[0028] In this embodiment, a temperature sensor is installed on the bearing 5, and the temperature sensor is electrically connected to the oil supply system.

[0029] In this embodiment, the oil supply system also includes a control module; the control module can collect information from the temperature sensor, the pressure gauge 7, the electromagnetic throttle valve 9 and the flow meter, and can control the oil distribution station A1, the oil distribution station B2 and the electromagnetic throttle valve 9 according to the information it receives, thereby controlling the amount of oil flowing through the oil distribution channel.

[0030] like Figure 2 As shown, a control method of the above oil supply system, the specific control method is as follows: Step 1) Before the gearbox is started, the control module performs primary allocation according to the operating condition information of the gearbox to be operated; Step 2) After the gearbox is running, the electromagnetic throttle valve 9 is opened to the initial state, and the oil distribution station A1 and the oil distribution station B2 supply oil to the gearbox; wherein, the oil distribution station A1 drives the oil to be delivered to each bearing 5 on the gearbox through the main oil channel 3 and the oil distribution channel 4, and the oil distribution station B2 drives the oil to be delivered to each bearing 5 on the gearbox through the temperature control oil channel 8 and the oil distribution channel 4; Step 3) After the gearbox runs to the calibrated working condition, when the temperature of each bearing 5 tends to be stable and the temperature of each bearing 5 is at the highest set temperature, the control module then reduces the opening of the throttle solenoid valve corresponding to the low-temperature bearing 5, and increases the opening of the throttle solenoid valve corresponding to the high-temperature bearing 5, thereby reducing the temperature difference of each bearing 5 on the gearbox.

[0031] With such an arrangement, when the gearbox is started, multiple unified electromagnetic throttle valves are opened to increase the oil flowing through the bearings, provide sufficient lubrication for the bearings, and ensure that the gearbox meets the heat dissipation requirements from startup to operation to calibration. At the same time, the status of each bearing can be manifested in the process through temperature; after the gearbox runs to the calibrated state, the opening of each electromagnetic throttle valve is dynamically controlled by the gear temperature, and the amount of oil flowing through each bearing is dynamically adjusted, so that the temperatures of each bearing of the gearbox tend to be consistent, thereby ensuring the stability and reliability of the gearbox operation process, realizing instant oil distribution and supply to the gearbox, adjusting the thermal balance of the gearbox, and improving the efficiency of the gearbox; and in the above scheme, the oil pressure in the main oil channel and the oil control oil channel can be controlled respectively by two oil distribution stations, further improving the dynamic adjustment capability of the gearbox under various working conditions and working states.

[0032] Further preferably, in the above step 1), the oil volume distributed by the oil distribution station A1 accounts for 70-80% of the total oil volume, and the oil volume distributed by the oil distribution station B2 accounts for 20-30% of the total oil volume.

[0033] Further preferably, in the above step 2), the initial opening of the electromagnetic throttle valve 9 is 1 / 2 of its maximum stroke.

[0034] Further preferably, in the above step 2), if the temperature of a bearing 5 is higher than the set temperature, the opening of the throttling solenoid valve corresponding to the high-temperature bearing 5 is increased. In this way, increasing the oil supply of the oil distribution station B2 to the bearing 5 can effectively prevent the high temperature from damaging the bearing 5 and control the oil pressure within the specified range.

[0035] Further preferably, in the above step 2), if the temperature of a bearing 5 is higher than the set temperature and the temperature difference between the bearing 5 and other bearings 5 ​​is large, the opening of the throttle valve corresponding to the bearing 5 is reduced. In this way, the oil supply of the oil distribution station B2 to the low-temperature bearing 5 is reduced, the energy loss is reduced, and the mechanical efficiency is improved. Further preferably, the control module input information includes the input power of the gearbox, the output power of the gearbox, the temperature of each bearing 5, the oil volume of each bearing 5, the oil injection volume of each gear, the total oil intake of the gearbox and the pressure in each oil channel 4.

[0036] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0037] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and intent of the present invention.

Claims

1. A control method for controlling an oil supply system of a gearbox, wherein a transmission shaft is mounted on a gearbox body through a bearing, and a plurality of transmission shafts are connected through gear transmission; characterized in that: The oil supply system comprises a control module, a main oil passage (3), a plurality of branch oil passages (4) and a plurality of oil control passages (8); wherein, after passing through the main oil passage (3), the oil is branched by the plurality of branch oil passages (4) to the respective bearings on the gear box; the plurality of oil control passages (8) correspond one-to-one to the plurality of bearings on the gear box, and the oil can flow directly to the bearings through the oil control passages (8) to realize oil supply, and an electromagnetic throttle valve (9) is installed on the oil control passage (8); the control module can collect the bearing temperature and control the opening of the electromagnetic throttle valve (9); The specific control methods are as follows: Step 1) Before the gearbox is started, the control module performs primary distribution of the oil flowing through the main oil channel and the control oil channel according to the operating condition information of the gearbox to be operated; Step 2) After the gearbox is running, the electromagnetic throttle valve (9) is opened to the initial state, the oil passes through the main oil passage (3) and is then sent from the oil passage (4) to each bearing (5) on the gearbox, and the oil passes through the temperature control oil passage (8) and is then sent to each bearing (5) on the gearbox; Step 3) After the gearbox runs to the calibrated working condition, when the temperature of each bearing (5) tends to be stable and the temperature of each bearing (5) is at the highest set temperature, the control module then reduces the opening of the throttle solenoid valve corresponding to the low-temperature bearing (5), and increases the opening of the throttle solenoid valve corresponding to the high-temperature bearing (5), thereby reducing the temperature difference of each bearing (5) on the gearbox.

2. A control method according to claim 1, characterized in that: The oil supply system further comprises an oil distribution station A (1) and an oil distribution station B (2), wherein the oil distribution station A (1) supplies oil to the main oil passage, and the oil distribution station B (2) supplies oil to the oil control passage (8).

3. A control method according to claim 2, characterized in that: The oil volume distributed by distribution station A (1) accounts for 70-80% of the total oil volume, and the oil volume distributed by distribution station B (2) accounts for 20-30% of the total oil volume.

4. A control method according to claim 1, characterized in that: In the above step 2), the initial opening of the electromagnetic throttle valve (9) is 1 / 2 of its maximum stroke.

5. A control method according to claim 1, characterized in that: In the above step 2), if the temperature of a bearing (5) is higher than the set temperature, the opening of the throttling solenoid valve corresponding to the high-temperature bearing (5) is increased.

6. A control method according to claim 1, characterized in that: In the above step 2), if the temperature of a bearing (5) is higher than the set temperature and the temperature difference between the bearing (5) and other bearings (5) is large, the opening of the throttle valve corresponding to the bearing (5) is reduced.

7. A control method according to claim 1, characterized in that: The temperature control oil passage (8) is connected to the oil distribution passage (4). In the above steps 2) and 3), the oil is delivered to the oil distribution passage (4) through the temperature control oil passage (8).

8. A control method according to claim 7, characterized in that: A check valve (6) is installed on the oil distribution channel (4), and the check valve (6) is arranged between the inlet of the oil distribution channel (4) and the outlet of the temperature control oil channel (8).

9. An oil supply system, characterized in that: A control method for an oil system as described in any one of claims 1 to 8 can be utilized.

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