Lubricating and cooling system for wind power gear box

Abstract

The utility model relates to a wind power gear box lubricating and cooling system which comprises an air cooling heat exchanger assembly, a filtering assembly, a gear pump, a gear box distributor, an oil pump motor and a gear box, a gear pump internal spline is arranged at one end of the gear pump, and an oil pump motor external spline is arranged at the output end of the oil pump motor. The gear pump internal spline and the oil pump motor external spline are matched with each other to form a spline pair, the gear pump and the oil pump motor are rigidly connected through the spline pair, the tooth form of the gear pump internal spline is an involute, and the tooth form of the oil pump motor external spline is matched with the tooth form of the gear pump internal spline. Compared with the prior art, the utility model has the advantages that the replacement of the oil pump motor and the gear pump is simplified.

Description

Technical Field

[0001] The utility model relates to the technical field of lubrication and cooling of wind power gear boxes, in particular to a lubrication and cooling system for wind power gear boxes. Background Art

[0002] When the existing fan is running in a low temperature environment, the lubricating oil has poor flow performance. Starting the machine under low temperature conditions is also prone to damage to the oil pump motor or coupling. The connection diagram of the oil pump motor and the coupling is shown in the figure. Figure 2 In addition, as the elastic body of the oil pump motor coupling inevitably wears out as the running time accumulates, the coupling is frequently damaged, the oil pump motor fails, and the fan frequently trips, consuming a large number of coupling spare parts every year. The replacement process is complicated, and the technical requirements for operation and maintenance personnel are high, which increases the operation and maintenance costs. Utility Model Content

[0003] The utility model aims to provide a wind power gearbox lubrication cooling system in order to simplify the replacement of an oil pump motor and a gear pump.

[0004] The purpose of the utility model can be achieved through the following technical solutions:

[0005] A wind power gearbox lubrication and cooling system, the system includes an air-cooled heat exchanger assembly, a filter assembly, a gear pump, a gearbox distributor, an oil pump motor and a gearbox, one end of the gear pump is provided with an internal spline of the gear pump, the output of the oil pump motor is provided with an external spline of the oil pump motor, the internal spline of the gear pump and the external spline of the oil pump motor cooperate with each other to form a spline pair, the gear pump and the oil pump motor are rigidly connected through the spline pair, the tooth shape of the internal spline of the gear pump is an involute, and the tooth shape of the external spline of the oil pump motor matches the tooth shape of the internal spline of the gear pump;

[0006] The gear pump and the oil pump motor are fixed on the gear box body together. The gear pump is connected to the filter assembly through the oil pipe. The filter assembly is connected to the air-cooled heat exchanger assembly through the oil pipe. The air-cooled heat exchanger assembly is connected to the gear box distributor through the oil pipe. The gear box distributor is fixed on the gear box.

[0007] Furthermore, the air-cooled heat exchanger assembly includes a variable frequency fan motor, an axial flow fan and a plate-fin heat exchanger. The fan motor and the axial flow fan are connected via a flat key on the motor output shaft of the fan motor, and the fan motor and the axial flow fan are installed together on the plate-fin heat exchanger.

[0008] Furthermore, the oil inlet valve block of the filter assembly is provided with a safety valve, the output end of the safety valve is connected to one end of an overflow oil pipe, and the other end of the overflow oil pipe is connected to a gear box.

[0009] Furthermore, the safety valve is a direct-acting relief valve.

[0010] Furthermore, a temperature control valve is provided inside the oil outlet valve block of the filter assembly, the output end of the gear pump is connected to the input end of the oil inlet valve block of the filter assembly, and the output end of the temperature control valve is connected to the oil inlet pipe of the air-cooled heat exchanger assembly and the oil inlet pipe of the gear box distributor.

[0011] Furthermore, a double-precision filter element is arranged in the filter assembly.

[0012] Furthermore, a distributor temperature sensor is provided at the inlet of the gear box distributor.

[0013] Furthermore, an oil pool temperature sensor is provided at the bottom of the oil pool of the gear box body.

[0014] Furthermore, the oil pump motor is a permanent magnet synchronous motor.

[0015] Further, the oil pump motor is connected to a current sensor.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] The gear pump and the motor of the utility model are rigidly connected by an involute spline pair. The spline connection consists of an external spline shaft and an internal spline hole. During operation, the torque is mainly transmitted by the side extrusion force of the key teeth. When the gear box oil pump motor or the gear pump fails and needs to be replaced, the new pump or motor can be directly connected and the bolts can be tightened according to the torque. The coupling design is cancelled, the system cost is reduced, the installation space of the pump group is reduced, the installation of the motor and the pump is simpler, the technical requirements for operation and maintenance personnel are reduced, the types of spare parts are reduced, and the demand for large-scale spare parts procurement each year is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the utility model;

[0019] Figure 2 It is a connection diagram of an existing oil pump motor and a coupling;

[0020] Figure 3 It is a schematic diagram of the involute spline connection of the utility model;

[0021] In the figure, variable frequency fan motor 1, axial flow fan 2, plate fin heat exchanger 3, gear box distributor 4, distributor temperature sensor 5, filter assembly 6, safety valve 7, temperature control valve 8, oil pump motor 9, gear pump 10, oil pool temperature sensor 11, current sensor 12, bell cover 13, coupling 14, oil pump motor external spline 15, gear pump internal spline 16. DETAILED DESCRIPTION

[0022] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and a specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0023] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0024] In conjunction with the accompanying drawings, some embodiments of the present invention are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0025] The utility model proposes a wind power gearbox lubrication and cooling system, the system includes an air-cooled heat exchanger component, a filter component 6, a gear pump 10, a gearbox distributor 4, an oil pump motor 9 and a gearbox, one end of the gear pump 10 is provided with an inner spline 16 of the gear pump, the output of the oil pump motor 9 is provided with an outer spline 15 of the oil pump motor, the inner spline 16 of the gear pump and the outer spline 15 of the oil pump motor cooperate with each other to form a spline pair, the gear pump 10 and the oil pump motor 9 are rigidly connected through the spline pair, the tooth shape of the inner spline 16 of the gear pump is an involute, the tooth shape of the outer spline 15 of the oil pump motor matches the tooth shape of the inner spline 16 of the gear pump, and the gear pump 10 and the oil pump motor 9 serve as a gearbox lubricating oil supply unit;

[0026] The gear pump 10 and the oil pump motor 9 are fixed together on the gear box body. The gear pump 10 is connected to the oil inlet valve block of the filter assembly 6 through an oil pipe. The oil outlet valve block of the filter assembly 6 is connected to the air-cooled heat exchanger assembly and the gear box distributor 4 through an oil pipe. The air-cooled heat exchanger assembly is connected to the gear box distributor 4 through an oil pipe.

[0027] The air-cooled heat exchanger assembly includes a variable frequency fan motor 1, an axial flow fan 2 and a plate-fin heat exchanger 3. The fan motor 1 and the axial flow fan 2 are connected by a flat key of the motor output shaft of the fan motor 1. The fan motor 1 and the axial flow fan 2 are installed together on the plate-fin heat exchanger 3 to meet the cooling requirements of the gear box.

[0028] The oil inlet valve block of the filter assembly 6 is provided with a safety valve 7, the safety valve 7 is connected to one end of an overflow oil pipe, and the other end of the overflow oil pipe is connected to a gear box.

[0029] The safety valve 7 is an overflow valve, which is mainly used to prevent the system from overloading when the system pressure is too high. The lubricating oil overflows to the gearbox oil pool through the overflow pipe, which plays a role in protecting the safety of the system. The oil outlet valve block at the lower end of the filter assembly 6 is provided with a temperature control valve 8. The output end of the gear pump 10 is connected to the input end of the filter cartridge oil inlet valve block of the filter assembly 6. The output end of the temperature control valve 8 is connected to the oil pipe of the air-cooled heat exchanger assembly. The temperature control valve 8 is used to control the flow of lubricating oil flowing through the plate-fin heat exchanger. The output end of the temperature control valve 8 is also directly connected to the gearbox distributor 4. When the oil pool temperature exceeds the action starting temperature of the temperature control valve 8, the higher the oil pool temperature, the higher the lubricating oil flow of the air-cooled heat exchanger assembly.

[0030] The filter assembly 6 is an internally installed double precision filter element. A distributor temperature sensor 5 is provided at the inlet of the gearbox distributor 4 to monitor the real-time temperature of the lubricating oil at the inlet of the gearbox. An oil pool temperature sensor 11 is provided at the bottom of the oil pool of the gearbox housing. The oil pump motor 9 is a permanent magnet synchronous motor. The oil pump motor 9 is connected to a current sensor 12 to convert the line current into a measurable voltage signal, thereby realizing the monitoring of the real-time data of the motor current.

[0031] When the utility model is working, the oil pump motor 9 is started, the gear pump 10 sucks oil from the gear box, and the oil flows into the filter assembly 6, passes through the cooling assembly, and enters the gear box distributor 4. A safety valve 7 is installed in the oil inlet valve block of the filter assembly 6. When the oil pressure reaches a certain threshold, the safety valve 7 is turned on, and the oil flows back into the gear box through the overflow oil pipe to prevent the system pressure from being too high. The oil from the oil outlet valve block of the filter assembly 6 enters the cooling assembly and then enters the gear box distributor 4.

[0032] The oil pump motor of the utility model adopts an involute spline connection, which reduces the influence of coupling vibration on the motor during operation, avoids the problems of the oil pump motor caused by elastomer wear, installation misalignment leading to coupling breakage, oil pump motor bore scraping, motor failure and shutdown due to frequent occurrences due to the use of bell jar 13 and coupling 14 design; at the same time, it reduces the demand for gear box oil pump coupling spare parts.

[0033] The utility model processes the shaft center and flange stop of the oil pump motor 9 with high precision, thereby ensuring the concentricity of the two after assembly, and solving the noise and vibration caused by the non-concentricity between the gear pump and the drive motor.

[0034] The utility model cancels the coupling 14 design of the traditional cooling system, reduces the system cost, reduces the installation space of the pump group, simplifies the installation of the motor and the pump, reduces the technical requirements for operation and maintenance personnel, and reduces the types of spare parts, reducing the demand for large-scale spare parts procurement every year. When the gear box oil pump motor or gear pump fails and needs to be replaced, the new pump or motor can be directly connected on site and the bolts can be tightened according to the torque, avoiding the previous coupling installation and the need for gap adjustment and other complex process requirements, greatly reducing the difficulty of motor replacement and improving the efficiency and economy of operation and maintenance.

[0035] In the present invention, the model of the current sensor can be: SCT013 and ACS712, etc.; the model of the temperature sensor can be: PT100, BA1, BA2, PT1000, Cu50K, etc. The model of the temperature control valve can be X1.326.45.100 or X1.437.45.100, etc. The temperature control valve automatically adjusts the flow rate according to the temperature, which is a prior art and will not be described in detail here.

[0036] The preferred specific embodiments of the utility model are described in detail above. It should be understood that ordinary technicians in this field can make many modifications and changes based on the concept of the utility model without creative work. Therefore, all technical solutions that can be obtained by technicians in this technical field based on the concept of the utility model through logical analysis, reasoning or limited experiments on the basis of the existing technology should be within the scope of protection determined by the claims.

Claims

1. A wind turbine gearbox lubrication and cooling system, characterized in that: The system comprises an air-cooled heat exchanger assembly, a filter assembly (6), a gear pump (10), a gear box distributor (4), an oil pump motor (9) and a gear box. One end of the gear pump (10) is provided with an inner spline (16) of the gear pump. The output of the oil pump motor (9) is provided with an outer spline (15) of the oil pump motor. The inner spline (16) of the gear pump and the outer spline (15) of the oil pump motor cooperate with each other to form a spline pair. The gear pump (10) and the oil pump motor (9) are rigidly connected via the spline pair. The tooth profile of the inner spline (16) of the gear pump is an involute. The tooth profile of the outer spline (15) of the oil pump motor matches the tooth profile of the inner spline (16) of the gear pump. The gear pump (10) and the oil pump motor (9) are fixed together on the gear box body; the gear pump (10) is connected to the filter assembly (6) through an oil pipe; the filter assembly (6) is connected to the air-cooled heat exchanger assembly through an oil pipe; the air-cooled heat exchanger assembly is connected to the gear box distributor (4) through an oil pipe; and the gear box distributor (4) is fixed on the gear box.

2. A wind turbine gearbox lubrication and cooling system according to claim 1, characterized in that: The air-cooled heat exchanger assembly comprises a variable frequency fan motor (1), an axial flow fan (2) and a plate-fin heat exchanger (3); the fan motor (1) and the axial flow fan (2) are connected via a flat key on the motor output shaft of the fan motor (1); the fan motor (1) and the axial flow fan (2) are mounted together on the plate-fin heat exchanger (3).

3. A wind turbine gearbox lubrication and cooling system according to claim 1, characterized in that: The oil inlet valve block of the filter assembly (6) is provided with a safety valve (7), the output end of the safety valve (7) is connected to one end of an overflow oil pipe, and the other end of the overflow oil pipe is connected to a gear box.

4. A wind turbine gearbox lubrication and cooling system according to claim 3, characterized in that: The safety valve (7) is a direct-acting relief valve.

5. A wind turbine gearbox lubrication and cooling system according to claim 3, characterized in that: A temperature control valve (8) is provided inside the oil outlet valve block of the filter assembly (6); the output end of the gear pump (10) is connected to the input end of the oil inlet valve block of the filter assembly (6); and the output end of the temperature control valve (8) is connected to the oil inlet pipe of the air-cooled heat exchanger assembly and the oil inlet pipe of the gear box distributor (4).

6. A wind turbine gearbox lubrication and cooling system according to claim 5, characterized in that: A double-precision filter element is arranged inside the filter assembly (6).

7. A wind turbine gearbox lubrication and cooling system according to claim 1, characterized in that: A distributor temperature sensor (5) is provided at the inlet of the gear box distributor (4).

8. The wind turbine gearbox lubrication and cooling system according to claim 1, characterized in that: An oil pool temperature sensor (11) is provided at the bottom of the oil pool of the gear box body.

9. The wind turbine gearbox lubrication and cooling system according to claim 1, characterized in that: The oil pump motor (9) is a permanent magnet synchronous motor.

10. The wind turbine gearbox lubrication and cooling system according to claim 1, characterized in that: The oil pump motor (9) is connected to a current sensor (12).

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