CN219692226U - Double-fed unit gear box cooler technical improvement and oil cooling fan reversing operation structure - Google Patents

Abstract

A technical modification of the gearbox cooler of a doubly-fed unit and an oil-cooling fan reversal operation structure. At present, the problem of high oil temperature is common in wind turbines during continuous operation at large loads. The reasons for high oil temperature in the entire wind power market are analyzed through statistics. When the oil temperature is higher than 75°C, the unit automatically limits power, causing the unit to lose power generation. A technical modification of the gearbox cooler of a doubly-fed unit and a reversing operation structure of an oil-cooled fan. It consists of: a radiator (1). The radiator is equipped with a fin group (2), and one side of the radiator is connected to the fan box. , the fan box is composed of a casing (3), a blade (4), a filter (5) and a bracket (6). The bracket is connected to the blades through a rotating shaft. A filter is installed between the blades and the bracket. The casing is fastened to the heat dissipation On the frame of the device, the heat sink group has a snake-shaped structure as a whole, and the top and bottom of the single heat sink (7) of the heat sink group adopt a wavy structure. The utility model is applied in the field of gear boxes.

Description

Technical modification of gearbox cooler of doubly-fed unit and reversing operation structure of oil-cooling fan

Technical field

The utility model relates to a technical modification of a gearbox cooler of a doubly-fed unit and an oil-cooling fan reversal operation structure.

Background technique

The gearbox is one of the most important and valuable components of a doubly-fed fan. The operating stability of the gearbox is very important for the stable operation of the fan. At present, most gearbox coolers of doubly-fed units use zigzag fins or corrugated fins. Fins, this type of fins has many disadvantages. First, the obstruction on the air side is very serious, and cleaning is difficult. The cooling capacity is maintained for a short time after each cleaning, and some equipment even has no effect after cleaning. Secondly, the structure is complex, the processing deviation is large, the flow channel resistance is large, the air pressure loss is large, it is easy to block, and it is difficult to clean after the blockage. It is very difficult to clean the mixture of fibers and oil that is blocked inside. The heat dissipation power of the cleaned cooler is less than 70% of the original design, so problems will occur soon after use.

At present, the problem of high oil temperature is common in wind turbines during continuous operation at large loads. The reasons for high oil temperature in the entire wind power market are analyzed statistically. When the oil temperature is higher than 75°C, the unit automatically limits power (different units have different settings), causing the unit to lose power generation. At present, most gearbox coolers of doubly-fed units use zigzag fins or corrugated fins. This type of fin has many shortcomings. First, the obstruction on the air side is very serious, and cleaning is difficult. The cooling capacity is maintained for a short time after each cleaning, and some equipment even has no effect after cleaning. At the same time, the disadvantages of the outer fins are complex structure, large processing deviation, large flow channel resistance, large air pressure loss, easy blockage, and difficulty in cleaning after blockage. It is very difficult to clean the mixture of fibers and oil that is blocked inside. The heat dissipation power of the cleaned cooler is less than 70% of the original design, so problems will occur soon after use.

Contents of the invention

The purpose of this utility model is to provide a technical modification of the gearbox cooler of a doubly-fed unit and an oil-cooling fan reversal operation structure.

The above purposes are achieved through the following technical solutions:

A technical modification of the gearbox cooler of a doubly-fed unit and an oil-cooled fan reversal operation structure, which consists of: a radiator, the radiator is equipped with a fin group, and one side of the radiator is connected to the fan box , the fan box is composed of a casing, blades, a filter and a bracket. The bracket is connected to the blades through a rotating shaft. A filter is installed between the blades and the bracket. The casing is fastened to the heat dissipation part. on the frame of the device.

The technical modification of the gearbox cooler of the doubly-fed unit and the reversing operation structure of the oil-cooling fan, the entire radiator group has a serpentine structure, and the top and bottom of the single radiator fin of the radiator group are made of waves. shape structure.

The technical modification of the gearbox cooler of the doubly-fed unit and the reversing operation structure of the oil-cooled fan. The fan box has a control module and two contactors to realize the fan blowback function. The two outputs of the control module The two contactors control the contactors K04.5.1 and K104.6.1 respectively. The two contactors are each equipped with a normally closed auxiliary contact. The two contactors form an interlock. The contactor K104.5.1 controls the forward rotation of the fan motor, and the contactor K104.6.1 Control motor reverse rotation

Beneficial effects of this utility model:

:1. This utility model uses non-louver-type wings instead of louver-type wings, so that the unit does not automatically limit power due to high oil temperature, increases the power generation of the unit, prolongs the service life of the gearbox, further improves the operating reliability of the unit, and reduces the oil consumption of the unit. High temperature failure.

2. Non-louvered fins replace louvered fins. The purpose of technical modification and oil-cooling fan reversal is to eliminate the problem of high oil temperature in the unit due to cooler blockage, while at the same time reducing the unit failure rate, improving equipment safety and reliability, and effectively controlling Cost of production.

3. This utility model replaces the zigzag-shaped wings with non-louver-shaped wings to prevent the radiator from being affected by sludge clogging and reducing the heat exchange efficiency. The radiator is redesigned so that the original size can be directly replaced and installed, and the heat dissipation efficiency of the radiator reaches 55KW. Ensure that the oil temperature of the gearbox runs within the normal temperature range, so that the unit does not automatically limit power due to high oil temperature, increase the power generation of the unit, extend the service life of the gear oil, extend the service life of the gearbox, further improve the operational reliability of the unit, and reduce unit oil High temperature failure.

Description of the drawings

Figure 1 is a schematic structural diagram of the utility model.

Figure 2 is a schematic structural diagram of a single heat sink.

Figure 3 is a schematic structural diagram of the fan circuit.

Figure 4 is a schematic diagram of the connection between the control module and the contactor.

Figure 5 is a ladder diagram of the DO port of the module.

In the picture: 1. Radiator, 2. Heat sink group, 3. Housing, 4. Blades, 5. Filter, 6. Bracket, 7. Single-chip heat sink.

Detailed ways

Example

A technical modification of the gearbox cooler of a doubly-fed unit and a reversing operation structure of an oil-cooled fan. It consists of: a radiator 1. The radiator is equipped with a fin group 2. One side of the radiator is connected to the fan. The fan box is connected to the fan box. The fan box is composed of a casing 3, a blade 4, a filter 5 and a bracket 6. The bracket is connected to the blades through a rotating shaft. A filter is installed between the blades and the bracket. The shell is fastened to the frame of the radiator. The heat sink set has a serpentine structure as a whole, and the top and bottom of the single heat sink 7 of the heat sink set adopt a wavy structure.

Example

The technical modification of the gearbox cooler of the doubly-fed unit and the reversing operation structure of the oil-cooling fan adopt fins without shutters, which have better passability and reduce the accumulation of impurities in the air in the fins. However, the heat dissipation efficiency is not as high as that of fins in the form of louvers. Therefore, we increased the thickness of the radiator to 113mm to increase the heat dissipation area and improve heat dissipation performance.

The louverless cooler adopts an outer fin channel design with low edge resistance. It does not use zigzag fins. The air side flow channel is open and the internal resistance is very small. It improves the air shock capability of the fins and uses a longer air side flow channel. Extend the heat exchange time, increase the heat exchange surface, and try to increase the air mixing degree in a short air passage time. This can effectively prevent the centrifugal separation of oil dirt and air and reduce the deposition of oil dirt. After extending the air side flow channel, the design is based on the size of the original mounting bracket to achieve interchangeable installation with the original equipment, ensuring that the cooler can be hoisted to the engine room from the lifting holes on the fan tower and the bottom side of the gear box.

Oil-cooled cooling fan with back-blow function

Due to poor sealing of the cabin, dust and catkins enter the cabin, and at the same time, oil vapor volatilized by gear oil leakage is present in the air in the cabin. Dust, catkins, and oil vapor are sucked in by the fan for a long time and adhere to the cooler. After mixing, they can easily cause blockage of the fin passages.

After the oil-cooling fan has a back-blow function, the fan blows back every two hours. The force of the wind can promptly blow away the dust, catkins, etc. attached to the radiator, and maintain the air channel of the radiator at all times. The outside of the radiator is kept clean at all times, so that the radiator does not automatically limit power due to high oil temperature due to blockage.

A control module and two contactors are added to the original fan main circuit to realize the fan backflush function. The two output ports of the module control contactors K04.5.1 and K104.6.1 respectively. The two contactors are each equipped with a normally closed auxiliary contact. The two contactors form an interlock. Contactor K104.5.1 controls the forward rotation of the fan motor. Contactor K104.6.1 controls motor reverse rotation.

control logic

The DI point of the control module is connected to the A1 port of the fan contactor K104.5. When the DI point has 24V, the control module starts to work. When there is no 24V, it stops working and the timer of the module is cleared at the same time.

DO1 port controls the forward rotation of the motor, and DO2 controls the reverse rotation of the motor. As shown in the ladder diagram, T1 (2 hours) is the forward rotation time of the motor, T2 (80 seconds) is the time from movement to rest of the motor, and T3 (3 minutes) is the reverse rotation time of the motor. Turn the time and complete the cycle every 2 hours, 5 minutes and 40 seconds.

Claims (3)

1. A kind of double-fed unit gear box cooler technical improvement and oil cooling fan reverse running structure, its composition includes: radiator, the radiator install fin group, characterized by: one side of radiator be connected with the fan case, the fan case constitute by casing, blade, filter screen and support, the support be connected with the blade through the pivot, blade and support between install the filter screen, the casing lock on the support body of radiator.

2. The dual feed unit gearbox cooler craftwork and oil cooler reverse run architecture of claim 1, characterized by: the whole fin group is in a snake-shaped structure, and the top and the bottom of a single fin of the fin group adopt a wave-shaped structure.

3. The dual feed unit gearbox cooler craftwork and oil cooler reverse run architecture of claim 1, characterized by: the fan box is provided with a control module and two contactors for realizing a fan back-blowing function, the two output ports of the control module respectively control the contactors K04.5.1 and K104.6.1, the two contactors are respectively provided with a normally-closed auxiliary contact, the two contactors form interlocking, the contactor K104.5.1 controls the fan motor to rotate positively, and the contactor K104.6.1 controls the motor to rotate reversely.