Transmission device and transmission system with variable speed or fixed speed operation and external oil supply function

Abstract

The present invention discloses a transmission device and transmission system with variable speed or fixed speed operation and external oil supply function, including: a transmission box; a transmission component; an external lubricating oil output component, including an oil supply pipeline and a valve group, the oil supply pipeline is connected to the system oil tank, the oil supply pipeline delivers lubricating oil to the bearings at the transmission side input end and the transmission side output end of the transmission component, and the oil return port and the oil outlet of the oil supply pipeline respectively deliver lubricating oil to the transmission side input end and the transmission side output end of the load outside the transmission box through the oil pipe to form a closed oil supply circuit. The present invention provides a new and convenient driving method for the traditional transmission system, and at the same time can reduce peripheral equipment, improve system integration, enhance system reliability, improve the overall efficiency of traditional transmission, and reduce energy consumption.

Description

Technical Field

[0001] The present invention relates to a power transmission system, and more specifically to a transmission device and a transmission system capable of variable speed or fixed speed operation and external oil supply. Background Art

[0002] Large thermal power station electric boiler feed pump units mostly use speed-regulating hydraulic coupling transmission devices to improve the efficiency of the pump unit under the entire speed regulation condition. They are mainly used for steam pump starting electric pump units and electric feed pump units.

[0003] With the increasing awareness and attention of the country and even the international community to "energy conservation and emission reduction" and "carbon emissions", and the widespread promotion and grid-connection of wind power and solar energy, large-scale thermal power and thermal power must carry out deep peak regulation to cooperate with the non-adjustable power supply of wind power and solar energy. Therefore, deep regulation also causes the hydraulic coupling transmission device to have a relatively low overall efficiency because its speed regulation transmission efficiency decreases as the speed decreases, and the hydraulic coupling is a slip loss type speed regulation device. There are many existing solutions to this problem, but the efficiency has not been maximized by the transformation of the hydraulic coupling. High-speed motor direct drive perfectly solves this problem, but there are two corresponding problems: one is the driving method of the front pump: if it is accelerated, the investment is large, and the entire pipeline must also be transformed, which increases the construction period; if it is driven by a low-speed motor alone, it increases energy consumption and system complexity, which is contrary to the original intention of energy saving, consumption reduction and efficiency improvement. Another problem is the lubrication system of the water supply pump group. The original water supply pump's lubricating oil system was undertaken by a liquid coupling. However, after the water supply pump is directly driven by a high-speed motor, there is no liquid coupling. It is necessary to add a thin oil station to solve the problem of lubricating oil for the water supply pump group. However, the location, height and fire protection requirements of the thin oil station have brought great difficulties to the original unit and also caused great inconvenience to the construction. Summary of the invention

[0004] An object of the present invention is to solve at least the above problems and to provide at least the advantages which will be described hereinafter.

[0005] Another object of the present invention is to provide a transmission device and transmission system that can operate at a variable speed or a fixed speed with an external oil supply function, thereby providing a new and convenient driving method for traditional transmission systems, while reducing peripheral equipment, improving system integration, enhancing system reliability, improving the overall efficiency of traditional transmissions, and reducing energy consumption.

[0006] In order to achieve these purposes and other advantages according to the present invention, a transmission device with variable speed or fixed speed operation and external oil supply function is provided, comprising:

[0007] The transmission case has a cavity, wherein a system oil tank is formed inside the cavity and is filled with lubricating oil;

[0008] A transmission assembly, which is located in the cavity, and has a transmission side input end and a transmission side output end;

[0009] An external lubricating oil output component is located in the cavity, and the external lubricating oil output component includes an oil supply pipeline and a valve group. The oil supply pipeline is connected to the system oil tank. The oil supply pipeline transports lubricating oil to the bearings at the transmission side input end and the transmission side output end of the transmission component. The return oil port and the oil outlet of the oil supply pipeline respectively transport lubricating oil to the transmission side input end and the transmission side output end of the load outside the transmission box through the oil pipe to form a closed oil supply circuit.

[0010] Preferably, the transmission assembly comprises an input shaft, an output shaft, and a constant-speed gear set, and the connection between the input shaft, the output shaft and the transmission box forms a transmission-side input end and a transmission-side output end of the transmission assembly.

[0011] Preferably, the transmission assembly includes an input shaft, an output shaft, and a speed change gear set, the speed change gear set is a speed increasing gear set or a speed reducing gear set, and the connection between the input shaft, the output shaft and the transmission box forms a transmission side input end and a transmission side output end of the transmission assembly.

[0012] Preferably, the valve group includes an inlet valve, an oil pump, an outlet valve, an outlet check valve, an oil overflow valve, and a total outlet check valve which are sequentially arranged on the oil supply pipeline from the oil return port to the oil outlet; the oil pump includes a mechanical pump driven by a fixed speed gear group or a variable speed gear group of the transmission assembly through a mechanical pump connecting component and / or an electric pump driven by a motor; the number of the mechanical pump and the electric pump can be one or more; the oil overflow valve is connected to the system oil tank through an oil overflow valve oil tank interface; and the inlet valve is connected to the system oil tank through an oil tank suction port.

[0013] Preferably, the inlet valve, oil pump, outlet valve and outlet check valve form a set of regulating valves, and the oil supply pipeline includes two or more sets of regulating valves in parallel, and the two or more sets of regulating valves can operate individually or in parallel.

[0014] Preferably, it also includes:

[0015] The monitoring component includes a detection module, a communication module, a control module, and a terminal. The detection component includes parameter sensors for temperature, pressure, vibration, and gas concentration. The detection module outputs detection parameters and sends them to the terminal through the communication module. The terminal operates the valve group through the control module to adjust the parameters.

[0016] A transmission system with variable speed or fixed speed operation and external oil supply function includes a fixed speed or speed regulating motor, a fixed speed or speed regulating power machine, which drives a load through the transmission device, and the return oil port and the oil outlet of the oil supply pipeline of the transmission device respectively transport lubricating oil to the load, the transmission side input end and the transmission side output end of the motor through the oil pipe to form a closed oil supply circuit.

[0017] A variable speed or fixed speed transmission system with an external oil supply function includes a fixed speed or speed regulating motor, a fixed speed or speed regulating power machine, which drives a load through the transmission device and coaxially drives another load at the same time. The return oil port and the oil outlet of the oil supply pipeline of the transmission device respectively transport lubricating oil to the load, the other load and the transmission side input end and the transmission side output end of the motor through the oil pipe to form a closed oil supply circuit.

[0018] A variable speed or fixed speed transmission system with an external oil supply function includes a fixed speed or speed regulating motor, a fixed speed or speed regulating power machine driving a load through the transmission device, and another motor driving another load at the same time. The return oil port and the oil outlet of the oil supply pipeline of the transmission device respectively transport lubricating oil to the load, the other load, the motor and the transmission side input end and the transmission side output end of the other motor through the oil pipe to form a closed oil supply circuit.

[0019] The present invention has at least the following beneficial effects:

[0020] The equipment of the present invention is simple, low-cost, and can simplify the water supply pump group and improve the operating efficiency of the water supply pump group. It can carry out system transformation on the water supply pump group under frequency converter speed regulation or constant speed operation to solve the system transmission, operation data monitoring, protection and oil supply problems after frequency conversion drive is adopted. It has local monitoring and protection and remote monitoring and protection with multiple functions such as voltage stabilization function, automatic oil temperature heating function, oil pressure monitoring and protection, differential pressure monitoring and protection, oil temperature monitoring and protection, vibration monitoring and protection (axial, vertical and horizontal vibration monitoring of all equipment in the system), and can realize remote communication and Internet monitoring, control and protection and other functions.

[0021] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of the structure of a technical solution of the transmission device of the present invention in a speed reduction application;

[0023] Figure 2 A schematic diagram of the structure of a technical solution of the transmission device of the present invention in a speed-increasing application;

[0024] Figure 3A technical solution of the transmission device of the present invention (different from Figure 1 ) is a schematic diagram of the structure in the speed reduction application;

[0025] Figure 4 A technical solution of the transmission device of the present invention (different from Figure 2 ) is a schematic diagram of the structure in the speed-up application;

[0026] Figure 5 A schematic diagram of a technical solution of the transmission system of the present invention;

[0027] Figure 6 A schematic diagram of a technical solution of the transmission system of the present invention;

[0028] Figure 7 A schematic diagram of a technical solution of the transmission system of the present invention;

[0029] Figure 8 A schematic diagram of a technical solution of the transmission system of the present invention;

[0030] Fig. 9 A schematic diagram of a technical solution of the transmission system of the present invention;

[0031] Fig.10 A schematic diagram of a technical solution of the transmission system of the present invention;

[0032] Fig.11 A front view of a technical solution of the transmission device of the present invention;

[0033] Fig.12 A side view of a technical solution of the transmission system of the present invention;

[0034] Fig.13 A top view of a technical solution of the transmission system of the present invention;

[0035] Fig.14 A schematic diagram of a technical solution of the transmission system of the present invention;

[0036] Fig.15 A schematic diagram of a technical solution of the transmission system of the present invention;

[0037] Fig.16 A schematic diagram of a technical solution of the transmission system of the present invention;

[0038] Fig.17 A schematic diagram of a technical solution of the transmission system of the present invention;

[0039] Fig.18 A schematic diagram of a technical solution of the transmission system of the present invention;

[0040] Fig.19 A schematic diagram of a technical solution of the transmission system of the present invention;

[0041] Fig. 20 A schematic diagram of a technical solution of the transmission system of the present invention;

[0042] Fig.21 It is a structural schematic diagram of a technical solution of the transmission system of the present invention. DETAILED DESCRIPTION

[0043] The present invention is further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0044] It should be understood that terms such as “having”, “including” and “comprising” used herein do not specify the existence or addition of one or more other elements or combinations thereof.

[0045] It should be noted that the experimental methods described in the following embodiments are conventional methods unless otherwise specified, and the reagents and materials can be obtained from commercial sources unless otherwise specified; in the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "set" should be understood in a broad sense, for example, they can be fixedly connected, set, or detachably connected, set, or connected and set in one piece. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood in specific circumstances. The orientation or position relationship indicated by the terms "lateral", "longitudinal", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention.

[0046] like Figure 1-4 , as shown in 11-21, the present invention provides a transmission device with variable speed or fixed speed operation and external oil supply function, comprising:

[0047] The transmission box is an integrated box body with a cavity. A system oil tank 6 is formed inside the cavity. Lubricating oil is poured inside, which is enough to circulate the lubricating oil in the oil supply pipeline and cool the heat generated by the friction of the bearing. The transmission box can be modified by a hydraulic coupler. The transmission mode of the hydraulic coupler is to transmit energy through the oil medium between the pump wheel and the turbine. At the same time, the speed of the turbine end (output end) can be adjusted by the opening of the spoon tube. The hydraulic coupler originally has an oil supply function, with its own oil tank and two sets of oil supply systems inside, one is an auxiliary oil pump system connected by an external motor (responsible for lubrication during startup and shutdown Oil pressure guarantee), the other is a mechanical oil pump connected by internal gears (responsible for the system lubricating oil press working oil pressure guarantee during normal operation). The two oil supply system mother pipes are connected together to provide oil pressure for the entire pump group or load group. An external oil pump can be connected to compensate the oil pressure (working oil pressure and lubricating oil pressure) of the existing oil system. The hydraulic coupling is transformed into a transmission box, the pump wheel turbine in the hydraulic coupling is removed and a diaphragm coupling or a gear coupling is installed to connect the gear end and the output end. The original internal lubricating oil system is retained, the working oil system is removed, and an external oil pump can also be connected to compensate the oil pressure of the existing lubricating oil system. At this time, the load speed is adjusted by changing the motor speed through the frequency converter (converter);

[0048] A transmission component is located in the cavity. The transmission component can be an existing mechanical transmission structure, such as a gear transmission mechanism, a chain transmission mechanism, a belt transmission mechanism, and a worm gear transmission mechanism. There is no limitation here. The corresponding transmission component is selected according to the on-site working conditions and customer needs. Some parts of the transmission component are immersed in lubricating oil. Specifically, for example, when the transmission component is a gear transmission mechanism, the transmission component includes but is not limited to a speed change gear set, an input shaft, an output shaft, a gear bearing, a transmission shaft bearing and other parts, wherein the gear bearing and the transmission shaft bearing are immersed in lubricating oil. The transmission component has a transmission side input end and a transmission side output end. The parts of the input shaft and the output shaft 4 of the transmission component extending out of the transmission box form the transmission side input end and the transmission side output end. The connection between the input shaft and the output shaft 4 of the transmission component and the conveying transmission box is provided with bearings, which need to be lubricated with lubricating oil.

[0049] An external lubricating oil output component is located in the cavity. The external lubricating oil output component includes an oil supply pipeline and a valve group. The oil supply pipeline is connected to the system oil tank 6 through a filter 15. The valve group includes but is not limited to the existing inlet valve 9, outlet valve 11, oil pump 5, oil pump motor 7, oil overflow valve 14, check valve, etc., and the number and connection sequence are not limited. The system oil tank 6 is equipped with but not limited to differential pressure filter, system oil tank filter, system oil tank heater, oil supply oil pressure detection, oil temperature detection and corresponding electronic control system and other components. The oil supply pipeline transports lubricating oil to the bearings at the transmission side input end and the transmission side output end of the transmission assembly. The return oil port 1 and the oil outlet 2 of the oil supply pipeline respectively transport lubricating oil to the bearings at the transmission side input end and the transmission side output end of the load outside the transmission box through the oil pipe to form a closed oil supply circuit. The loads include but are not limited to motors, fans, water pumps, belt conveyors, any form of compressors, turbines, four-quadrant operation, grinders, steam turbines, etc.

[0050] In the prior art, the hydraulic coupling, water pump, pre-pump, motor, and transmission box are arranged compactly in the factory building, and a large space is required to place the thin oil station (need to be placed below 0m on the ground), which makes the construction and transformation difficult. In the above technical scheme, the installation of the transmission device does not require the change of the existing load (water pump, pre-pump, motor, steam turbine) of the factory building, is compatible with the existing lubricating oil pipeline, releases the space occupied by the hydraulic coupling, and has a fast construction speed and simple later maintenance. In addition, the small amount of infrastructure will save infrastructure costs (foundation pit excavation, ground pipeline construction, etc.), and the construction period is shortened by more than half a month. The present invention has simple equipment, low cost, simplifies the water pump group, improves the operating efficiency of the water pump group, and performs system transformation on the water pump group under frequency converter speed regulation or fixed speed operation to solve the system transmission, operation data monitoring, protection and oil supply problems after adopting variable frequency drive. The present invention can be applied to variable speed transmission occasions in different situations, without being restricted by industry, site, transmission power, transmission ratio, transmission speed, voltage, or current. It provides a new and convenient driving mode for traditional transmission systems, while reducing peripheral equipment, improving system integration, enhancing system reliability, improving the overall efficiency of traditional transmission, and reducing energy consumption.

[0051] In another technical solution, the transmission assembly includes an input shaft, an output shaft 4, and a constant-speed gear set 3. The connection between the input shaft, the output shaft 4 and the transmission box forms a transmission-side input end and a transmission-side output end of the transmission assembly, which is preferably a gear transmission mechanism. The constant-speed gear set 3 is selected according to customer needs so that the speed ratio is 1 to achieve constant-speed operation.

[0052] In another technical solution, the transmission assembly includes an input shaft, an output shaft 4, and a speed-changing gear set 3. The speed-changing gear set 3 is a speed-increasing gear set 3 or a speed-reducing gear set 3. The connection between the input shaft, the output shaft 4 and the transmission box forms a transmission side input end and a transmission side output end of the transmission assembly, which is preferably a gear transmission mechanism. The speed-changing gear set 3 is selected according to customer needs so that the speed ratio is >1 or <1 to achieve variable speed operation, for example Figure 6-8 When the frequency converter, converter or power supply shown in 10 drives a motor to drive a load through the transmission device, the output speed can be increased by the speed-increasing gear set 3, and also for example Figure 5 When the high-frequency inverter, converter or power supply shown drives a high-speed motor to drive a load through the transmission device, the output speed can be reduced by the speed reduction gear set 3. Fig. 9 When the frequency converter, converter or power supply shown drives a motor to drive a load through the transmission device, the output speed can be reduced by the speed reduction gear set 3.

[0053] In another technical solution, Figure 1-4 As shown, the valve group includes an inlet valve 9, an oil pump 5, an outlet valve 11, an outlet check valve 13, an overflow valve 14, and a total outlet check valve 12, which are sequentially arranged on the oil supply pipeline from the oil return port 1 to the oil outlet port 2. The oil pump 5 includes a mechanical pump driven by the fixed speed gear group 3 or the speed change gear group 3 of the transmission assembly through a mechanical pump connecting component 16 and / or an electric pump driven by the oil pump motor 7. The number of mechanical pumps and electric pumps can be one or more. The overflow valve 14 is connected to the system oil tank 6 through the overflow valve tank interface 10, and the inlet valve 9 is connected to the system oil tank 6 through the system oil tank suction port 8. The semi-closed oil supply circuit of the dilution station requires pressure-free oil return and cannot achieve pressure-return oil. The closed oil supply circuit of the present technical solution allows pressure-return oil.

[0054] In another technical solution, Figure 1-4 As shown, the inlet valve 9, oil pump 5, outlet valve 11, and outlet check valve 13 form a set of regulating valves, and the oil supply pipeline includes two or more sets of regulating valves in parallel, and the multiple sets of regulating valves can operate separately or in parallel. Specific requirements can be customized according to customers, and rapid replacement can be achieved when the equipment is damaged to avoid affecting the oil supply and return. The brand and model of the components can be specified according to customer needs.

[0055] In another technical solution, it also includes:

[0056] The monitoring component includes a detection module, a communication module, a control module, and a terminal. The detection component includes parameter sensors for temperature, pressure, vibration, and gas concentration, such as pressure sensors, vibration sensors, temperature sensors, and gas concentration detection components. The detection module outputs the detection parameters and sends them to the terminal through the communication module. The terminal operates the valve group through the control module to adjust the parameters. The terminal adds existing Internet functions and performs remote control through pictures, texts, tables, etc. The monitoring component includes but is not limited to a component that has local monitoring and remote monitoring of multiple functions such as voltage stabilization function, automatic oil temperature heating function, oil pressure monitoring, differential pressure monitoring, oil temperature monitoring, and vibration monitoring (axial, vertical, and horizontal vibration monitoring of the system), and can realize remote communication and Internet monitoring and control functions. The monitoring component realizes local monitoring and protection and remote monitoring and protection of multiple functions such as self-contained voltage stabilization function, automatic oil temperature heating function, oil pressure monitoring and protection, differential pressure monitoring and protection, oil temperature monitoring and protection, and vibration monitoring and protection (axial, vertical, and horizontal vibration monitoring of all equipment in the system), and can realize remote communication and Internet monitoring, control, and protection functions.

[0057] A variable speed or fixed speed transmission system with external oil supply function includes a fixed speed or speed regulating motor, a fixed speed or speed regulating power machine driving a load through the transmission device, and the oil return port 1 and the oil outlet 2 of the oil supply pipeline of the transmission device respectively transport lubricating oil to the load, the transmission side input end and the transmission side output end of the motor through the oil pipe to form a closed oil supply circuit. The fixed speed or speed regulating motor can be a frequency converter, converter or power supply in the topological form to drive a high speed or normal speed motor, such as Figure 8 As shown, the transmission system is applied to any topological form of frequency converter, converter or power drive motor (the motor speed range is not limited, it can run at 0<rpm≤3000, and it can also run at rpm>3000, the rated voltage and rated current are not limited, and the motor form includes any form of structure motor such as synchronous motor, asynchronous motor or permanent magnet synchronous motor, DC motor, AC motor, etc.) through the transmission device (speed increase) to drive any form of load (fan, water pump, belt conveyor, any form of compressor, turbine, four-quadrant operation, mill, steam turbine) application scenario; Fig.21 The method shown is Figure 8The difference between the shown method is that the transmission device (speed increaser) is a hydraulic coupling modified gearbox applied to a direct drive transmission system. The system oil tank is a hydraulic coupling, used as the main oil pump and auxiliary oil pump. The oil supply pipeline and valve group are not shown. The pump turbine in the hydraulic coupling is removed and a diaphragm coupling or a toothed coupling is installed to connect the gear end and the output end. The original internal lubricating oil system is retained, and the working oil system is removed. An external oil pump can also be connected to compensate for the oil pressure of the existing lubricating oil system. At this time, the load is adjusted by changing the motor speed through the frequency converter (converter); Fig. 20 As shown, the transmission system is applied to any topological form of frequency converter, converter or power drive motor (the motor speed range is not limited, it can run at 0<rpm≤3000, or it can run at rpm>3000, the rated voltage and rated current are not limited, and the motor form includes any form of structure such as synchronous motor, asynchronous motor or permanent magnet synchronous motor, DC motor, AC motor, etc.) through the transmission device (speed increaser) to drive the application scenario of the feed water pump of the unit with a power generation capacity of more than 150MW, wherein the transmission device (speed increaser) is a hydraulic coupler modified gear box applied to a direct drive transmission system, the system oil tank is a hydraulic coupler, used as a main oil pump and an auxiliary oil pump, the oil supply pipeline and valve group are not shown, the pump wheel turbine in the hydraulic coupler is removed and a diaphragm coupling or a toothed coupling is installed to connect the gear end and the output end, the original internal lubricating oil system is retained, the working oil system is removed, and an external oil pump can also be connected to compensate for the oil pressure of the existing lubricating oil system. At this time, the load is adjusted by changing the motor speed through the frequency converter (converter).

[0058] A variable speed or fixed speed transmission system with external oil supply function includes a fixed speed or speed regulating motor, a fixed speed or speed regulating power machine, which drives a load through the transmission device and drives another load coaxially at the same time. The oil return port 1 and the oil outlet port 2 of the oil supply pipeline of the transmission device respectively transport lubricating oil to the load, the other load and the transmission side input end and the transmission side output end of the motor through the oil pipe to form a closed oil supply circuit. The fixed speed or speed regulating motor can be a topological inverter, converter or power supply to drive a motor, such as Figure 5 As shown, the transmission system is applied to a high-frequency inverter, high-frequency converter or high-frequency power supply of any topological form to drive a high-speed motor (the motor speed range is rpm>3000, the rated voltage and rated current are not limited, and the motor form includes any form of structure such as a synchronous motor, an asynchronous motor or a permanent magnet synchronous motor, a DC motor, an AC motor, etc.) to drive the front pump through the transmission device (speed reduction), and the high-speed motor coaxially drives the feed water pump of a unit with a power generation capacity of more than 150MW. Fig.14 The method shown is Figure 5The difference between the shown method is that the transmission device (speed increaser) is a hydraulic coupling modified gearbox applied to a direct drive transmission system. The system oil tank is a hydraulic coupling, used as the main oil pump and auxiliary oil pump. The oil supply pipeline and valve group are not shown. The pump turbine in the hydraulic coupling is removed and a diaphragm coupling or a toothed coupling is installed to connect the gear end and the output end. The original internal lubricating oil system is retained, and the working oil system is removed. An external oil pump can also be connected to compensate for the oil pressure of the existing lubricating oil system. At this time, the load is adjusted by changing the motor speed through the frequency converter (converter); Figure 6 As shown, the transmission system is applied to any topological form of frequency converter, converter or power supply driving conventional motor (motor speed range 0<rpm≤3000, rated voltage and rated current are not limited, motor form includes synchronous motor, asynchronous motor or permanent magnet synchronous motor, DC motor, AC motor and other motors of any structure) to drive the feed pump of the unit with a power generation capacity of more than 150MW through the transmission device (speed increase), and the motor coaxially drives the pre-pump application scenario, Fig.16 The method shown is Figure 6 The difference of the method shown is that the transmission device (speed increaser) is a hydraulic coupling modified gear box applied to the water pump group. The system oil tank is provided by the hydraulic coupling and used as the main oil pump and auxiliary oil pump. The oil supply pipeline and valve group are not shown. The pump turbine in the hydraulic coupling is removed and a diaphragm coupling or a tooth coupling is installed to connect the gear end and the output end. The original internal lubricating oil system is retained, and the working oil system is removed. An external oil pump can also be connected to compensate for the oil pressure of the existing lubricating oil system. At this time, the load is adjusted by changing the motor speed through the frequency converter (converter); Fig. 9 As shown, the transmission system is applied to any topological form of frequency converter, converter or power-driven motor (the motor speed range is not limited, it can run at 0<rpm≤3000, and it can also run at rpm>3000, the rated voltage and rated current are not limited, and the motor form includes any form of structure motor such as synchronous motor, asynchronous motor or permanent magnet synchronous motor, DC motor, AC motor, etc.) through the transmission device (speed reduction) to drive any form of load (fan, water pump, belt conveyor, any form of compressor, turbine, four-quadrant operation, mill, steam turbine), and at the same time, the motor coaxially drives any form of another load (fan, water pump, belt conveyor, any form of compressor, turbine, four-quadrant operation, mill, steam turbine), and the application scenario at the same time; Fig.15 The method shown is Fig. 9The difference of the method shown is that the transmission device (speed increaser) is a hydraulic coupling modified gearbox applied to a direct drive transmission system. The system oil tank is provided by the hydraulic coupling and is used as the main oil pump and auxiliary oil pump. The oil supply pipeline and valve group are not shown. The inside of the liquid coupling can be connected to a direct coupling (diaphragm or gear coupling) after the impeller turbine is modified. The impeller turbine in the hydraulic coupling is removed and a diaphragm coupling or a gear coupling is installed to connect the gear end and the output end. The original internal lubricating oil system is retained, and the working oil system is removed. An external oil pump can also be connected to compensate for the oil pressure of the existing lubricating oil system. At this time, the load speed is adjusted by changing the motor speed through the frequency converter (converter); such as Fig.10 As shown, the transmission system is applied to a motor driven by a frequency converter, a converter or a power supply of any topological form (the motor speed range is not limited, and can be operated at 0<rpm≤3000, or at rpm>3000, the rated voltage and rated current are not limited, and the motor form includes a synchronous motor, an asynchronous motor or a permanent magnet synchronous motor, a DC motor, an AC motor and any other form of motor) through the transmission device (speed increase) to drive any form of load (fan, water pump, belt conveyor, any form of compressor, turbine, four-quadrant operation, mill, steam turbine), and at the same time, the motor (the motor speed range is not limited, and can be operated at 0<rpm≤3000, or at rpm>3000, the rated voltage and rated current are not limited, and the synchronous motor or the asynchronous motor can be used) coaxially drives any form of another load (fan, water pump, belt conveyor, any form of compressor, turbine, four-quadrant operation, mill, steam turbine) application scenario; Fig.17 The method shown is Fig.10 The difference in the method shown is that the transmission device (speed increaser) is a hydraulic coupling modified gearbox applied to a direct drive transmission system, the system oil tank is a hydraulic coupling, used as a main oil pump and an auxiliary oil pump, the oil supply pipeline and valve group are not shown, the pump turbine in the hydraulic coupling is removed and a diaphragm coupling or a toothed coupling is installed to connect the gear end and the output end, the original internal lubricating oil system is retained, the working oil system is removed, and an external oil pump can also be connected to compensate for the oil pressure of the existing lubricating oil system. At this time, the load is adjusted by changing the motor speed through the frequency converter (converter).

[0059] A variable speed or fixed speed transmission system with external oil supply function includes a fixed speed or speed regulating motor, a fixed speed or speed regulating power machine driving a load through the transmission device, and another motor driving another load at the same time. The oil return port 1 and the oil outlet 2 of the oil supply pipeline of the transmission device respectively transport lubricating oil to the load, the other load, the motor and the transmission side input end and the transmission side output end of the other motor through the oil pipe to form a closed oil supply circuit. The fixed speed or speed regulating motor can be a frequency converter, converter or power supply in the topological form to drive a motor, such as Figure 7As shown, the transmission system is applied to a conventional motor driven by a frequency converter, converter or power supply of any topological form (the motor speed range is 0<rpm≤3000, and it can also run at rpm>3000, the rated voltage and rated current are not limited, and the motor form includes any form of structure such as a synchronous motor, an asynchronous motor or a permanent magnet synchronous motor, a DC motor, an AC motor, etc.) to drive the feed pump of a unit with a power generation capacity of more than 150MW through the transmission device (speed increase), and the pre-pump motor drives the pre-pump alone; Fig.18 The method shown is Figure 7 The difference between the shown method is that the transmission device (speed increaser) is a hydraulic coupling modified gearbox applied to a direct drive transmission system. The system oil tank is a hydraulic coupling, used as the main oil pump and auxiliary oil pump. The oil supply pipeline and valve group are not shown. The pump turbine in the hydraulic coupling is removed and a diaphragm coupling or a toothed coupling is installed to connect the gear end and the output end. The original internal lubricating oil system is retained, and the working oil system is removed. An external oil pump can also be connected to compensate for the oil pressure of the existing lubricating oil system. At this time, the load is adjusted by changing the motor speed through the frequency converter (converter); Fig.19 As shown, the transmission system is applied to a motor driven by a frequency converter, converter or power supply of any topological form (the motor speed range is not limited, and can be operated at 0<rpm≤3000, or can be operated at rpm>3000, the rated voltage and rated current are not limited, and the motor form includes any form of structure such as synchronous motor, asynchronous motor or permanent magnet synchronous motor, DC motor, AC motor, etc.) to drive any form of load (fan, water pump, belt conveyor, any form of compressor, turbine, four-quadrant operation, mill, steam turbine) through the transmission device (speed increase), and another motor alone drives any Another type of load (fans, water pumps, belt conveyors, any type of compressors, turbines, four-quadrant operation, mills, steam turbines) application scenario, where the transmission device (speed increaser) is a hydraulic coupling modified gearbox applied to a direct drive transmission system. The system oil tank is a hydraulic coupling, used as the main oil pump and auxiliary oil pump, and the oil supply pipeline and valve group are not shown. The pump turbine in the hydraulic coupling is removed and a diaphragm coupling or a toothed coupling is installed to connect the gear end and the output end. The original internal lubricating oil system is retained, and the working oil system is removed. An external oil pump can also be connected to compensate for the oil pressure of the existing lubricating oil system. At this time, the load is adjusted by changing the motor speed through the frequency converter (converter).

[0060] Improvements are made to existing application scenarios. For example, in speed reduction applications, the output shaft of the high-speed motor (speed higher than 3000rpm) drives the pre-pump (speed lower than 3000rpm), and at the same time coaxially drives the liquid couple (rated input 1490rpm, rated output 6050rpm, rated transmission power 5500KW) to drive the water feed pump (rated speed of 1490rpm, rated voltage 6KV, rated power 5500KW).

[0061] like Figure 5 Or as shown in 9, in the new application scenario, the original water feed pump motor and liquid coupling are removed, the original water feed pump motor is replaced with a high-speed motor, the liquid coupling is removed and the motor is moved forward to directly drive the water feed pump, and the high-speed motor and the pre-pump are driven by the device of the present invention. Add a frequency conversion device to drive the high-speed motor, and the frequency conversion device can be of any topology. High-speed motor parameters: the speed is a 2-stage motor with a rated speed of 6050rpm, a rated voltage of 6KV, and a rated power of 5500KW. Parameters of the device of the present invention: rated input 6050rpm, rated output 1495rpm, and rated power 250KW. Its input end is driven by a high-speed motor, and the output end of the high-speed motor is connected to a load, and the load is the pre-pump of the power plant water feed pump.

[0062] The present invention makes full use of the original space, with minor changes, and maintains the integrity of the water supply pump unit to the maximum extent, thereby increasing the feasibility of the transformation of the existing units. The dilute oil station needs to be installed below zero meters of the plant, and the return oil needs to be naturally pressure-free. The original units do not have much space to install the dilute oil station, oil supply pipelines and other facilities; the present invention has fast construction and saves 2 weeks of construction period (the average power generation of the power plant is 70% of the nominal power generation per day, for example, 300,000 units have an average power generation of 210,000 kWh per hour, 5.04 million kWh per day, and 0.3 yuan per kWh. The profit of the power plant for each day of construction is about 1.5 million); the present invention saves engineering workload, and for every 300,000 units of water supply pump group, the engineering workload saved is about 300,000 per month; the present invention requires less maintenance in the later stage; the transmission efficiency is high, and the energy-saving purpose is achieved at the same time, which can further improve the operating efficiency of the water supply pump unit.

[0063] The number of devices and processing scales described here are used to simplify the description of the present invention. Applications, modifications and variations of the present invention will be obvious to those skilled in the art.

[0064] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation modes, and they can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A transmission device with variable speed or fixed speed operation and external oil supply function, characterized in that: include: The transmission case has a cavity, wherein a system oil tank is formed inside the cavity and is filled with lubricating oil; A transmission assembly, which is located in the cavity, and has a transmission side input end and a transmission side output end; An external lubricating oil output assembly is located in the cavity, and includes an oil supply pipeline and a valve group. The oil supply pipeline is connected to the system oil tank, and the oil supply pipeline delivers lubricating oil to the bearings at the transmission side input end and the transmission side output end of the transmission assembly. The oil return port and the oil outlet of the oil supply pipeline respectively deliver lubricating oil to the transmission side input end and the transmission side output end of the load outside the transmission box through the oil pipe to form a closed oil supply circuit; The valve group includes an inlet valve, an oil pump, an outlet valve, an outlet check valve, an oil overflow valve, and a total outlet check valve which are sequentially arranged on the oil supply pipeline from the oil return port to the oil outlet. The oil pump includes a mechanical pump driven by a fixed speed gear set or a variable speed gear set of the transmission assembly through a mechanical pump connecting component and / or an electric pump driven by a motor. The number of the mechanical pump and the number of the electric pump are both one or more. The oil overflow valve is connected to the system oil tank through an oil overflow valve oil tank interface, and the inlet valve is connected to the system oil tank through an oil tank suction port. The inlet valve, oil pump, outlet valve and outlet check valve form a set of regulating valves, and the oil supply pipeline includes two or more sets of regulating valves connected in parallel, and the two or more sets of regulating valves can operate independently or in parallel; Also includes: The monitoring component includes a detection module, a communication module, a control module, and a terminal. The detection module includes parameter sensors for temperature, pressure, vibration, and gas concentration. The detection module outputs detection parameters and sends them to the terminal through the communication module. The terminal operates the valve group through the control module to adjust the parameters.

2. The variable speed or fixed speed transmission device with external oil supply function as claimed in claim 1, characterized in that: The transmission assembly comprises an input shaft, an output shaft, and a constant-speed gear set. The connection between the input shaft, the output shaft and the transmission box forms a transmission-side input end and a transmission-side output end of the transmission assembly.

3. The variable speed or fixed speed transmission device with external oil supply function as claimed in claim 1, characterized in that: The transmission assembly includes an input shaft, an output shaft, and a speed-changing gear set. The speed-changing gear set is a speed-increasing gear set or a speed-reducing gear set. The connection between the input shaft, the output shaft and the transmission box forms a transmission-side input end and a transmission-side output end of the transmission assembly.

4. A transmission system with variable speed or fixed speed operation and external oil supply function, characterized in that: It comprises a fixed speed or speed regulating motor, and the fixed speed or speed regulating motor drives a load through the transmission device described in any one of claims 1 to 3, and the return oil port and the oil outlet of the oil supply pipeline of the transmission device respectively transport lubricating oil to the load, the transmission side input end and the transmission side output end of the motor through the oil pipe to form a closed oil supply circuit.

5. A transmission system with variable speed or fixed speed operation and external oil supply function, characterized in that: It comprises a fixed speed or speed regulating motor, a fixed speed or speed regulating motor driving a load through the transmission device according to any one of claims 1 to 3, and simultaneously coaxially driving another load, wherein the oil return port and the oil outlet of the oil supply pipeline of the transmission device respectively transport lubricating oil to the load, the other load and the transmission side input end and the transmission side output end of the motor through the oil pipe to form a closed oil supply circuit.

6. A transmission system capable of variable speed or fixed speed operation with external oil supply function, characterized in that: It comprises a fixed speed or speed regulating motor, a fixed speed or speed regulating motor driving a load through the transmission device according to any one of claims 1 to 3, and another motor driving another load at the same time, the return oil port and the oil outlet of the oil supply pipeline of the transmission device respectively transport lubricating oil to the load, the other load, the motor and the transmission side input end and the transmission side output end of the other motor through the oil pipe to form a closed oil supply circuit.

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