CN105221501A - A kind of wind driven generation set main shaft locking synchronization hydraulic system - Google Patents

Abstract

The present invention relates to a kind of wind driven generation set main shaft locking synchronization hydraulic system, it comprises one-way valve, selector valve, locking cylinder, selector valve described in 1:1 flow divider-combiner is 3-position 4-way meta M type selector valve, the pressure port P of 3-position 4-way meta M type selector valve communicates with the outlet of one-way valve, the oil return inlet T of 3-position 4-way meta M type selector valve communicates with fuel tank, two oil outlet P1 and P2 of 3-position 4-way meta M type selector valve communicate with the filler opening of flow divider-combiner and the outlet of two locking cylinders respectively, two oil outlets of flow divider-combiner communicate with the oiler of two locking cylinders respectively.The hydraulic oil that oil hydraulic pump of the present invention pumps is by 3-position 4-way meta M type selector valve, then through flow divider-combiner shunting, the 1:1 of hydraulic oil according to default is shunted, 2 locking cylinders, thus the stroke of two locking cylinders is identical reaches synchronous, reach the high reliability synchro system of designing requirement.

Description

A wind turbine main shaft locking synchronous hydraulic system

technical field

The invention relates to the field of wind power generators, in particular to a synchronous hydraulic system for locking the main shaft of a wind power generator set.

Background technique

As the power of megawatt wind turbines gradually increases, especially for direct-drive wind turbines, when maintaining the hub, it is inevitable to lock the hub, that is, the main shaft of the wind turbine, so as to ensure the safety of maintenance personnel. To achieve this function, the industry generally uses a single locking pin of manual pump type or electric pump type to lock the hub. When the required locking torque cannot meet the requirements, the only way to increase the diameter of the locking pin is to increase the diameter of the locking pin. Larger, resulting in a corresponding increase in the size of the interface of the whole machine. At this time, two locking pins need to be used at the same time. Including oil tank 1, liquid level gauge 3, air filter 2, hand pump 4, overflow valve 5, one-way valve 6, pipe stop valve 7, pressure gauge 8, two-position four-way reversing valve 13, locking cylinder Ⅰ11 and locking cylinder Ⅱ12. The oil outlet of the manual pump 4 communicates with the oil inlet of the one-way valve 6, and a relief valve 5 communicated with the oil tank 1 is provided between the oil outlet of the manual pump 4 and the oil inlet of the one-way valve 6, and the one-way valve The oil outlet of 6 is connected with the oil inlet of the two-position four-way reversing valve 13, and the two oil outlets of the two-position four-way reversing valve 13 are respectively connected with the oil inlets of the locking cylinder I11 and the locking cylinder II12 and The oil return port is connected, and the oil return port of the two-position four-way reversing valve 13 is connected with the oil tank 1. Since the locking cylinder Ⅰ11 and locking cylinder Ⅱ12 are connected in parallel, the hydraulic oil entering the rodless cavity of the two locking cylinders often has a different flow rate, that is, the displacement of the piston rod of the locking cylinder is different, which can easily lead to a single locking cylinder piston rod If the load is too large, the piston rod of the locking cylinder will be sheared, and even cause personal injury. The existing spindle locking system cannot meet the high reliability requirements that two locking cylinders lock the hub at the same time to ensure personnel safety.

Contents of the invention

The object of the present invention is to overcome the above defects and provide a synchronous hydraulic system for locking the main shaft of the wind power generating set with simple structure and reliable locking.

The present invention is achieved through the following technical solutions: a synchronous hydraulic system for locking the main shaft of a wind power generating set, which includes a check valve, a reversing valve, a locking cylinder, and a diverting and collecting valve, and the reversing valve is three Four-position, four-way, middle-position, M-type reversing valve, the diverter-collecting valve is a 1:1 diversion-and-collection valve, and the pressure port P of the three-position, four-way, middle-position, M-type reversing valve communicates with the outlet of the one-way valve. The oil return port T of the four-position four-way mid-position M-type reversing valve is connected to the oil tank, and the two oil outlets P1 and P2 of the three-position four-way mid-position M-type reversing valve are respectively connected to the oil inlet and the The outlets of the two locking cylinders communicate with each other, and the two oil outlets of the diverting and collecting valve respectively communicate with the oil inlets of the two locking cylinders.

Preferably, an overflow valve communicated with the oil tank is provided between the two oil outlets of the diverter-collection valve and the oil inlet of the locking cylinder.

The beneficial technical effect of the present invention is that the hydraulic oil pumped out by the hydraulic pump passes through the three-position four-way middle M-type directional valve and then passes through the three-position four-way middle M-type directional valve and The diversion and collection valve divides the flow, divides the hydraulic oil according to the 1:1 setting of the system, and the hydraulic oil that has been evenly divided enters the two locking cylinders respectively. The displacement of the locking cylinder depends on the flow rate. At this time, the displacement of the two locking cylinders The stroke is the same to achieve synchronization, which meets the design requirements of a high-reliability synchronization system. In addition, overflow valves are added to the two outlets of the diverter-collector valve to protect the safety of the system.

Description of drawings

Fig. 1 is the hydraulic principle schematic diagram of the embodiment of the present invention;

Fig. 2 is a schematic diagram of the hydraulic principle of the background technology of the present invention.

detailed description

The present invention will be further described below in conjunction with drawings and embodiments.

Referring to accompanying drawing 1, a kind of main shaft locking synchronous hydraulic system of wind power generating set includes liquid level gauge 3, air filter 2, manual pump 4, overflow valve 5, one-way valve 6, pipe type stop valve 7, pressure gauge 8. Locking cylinder I11 and locking cylinder II12, the fuel tank 1 is provided with an air filter 2, a liquid level gauge 3 is installed in the fuel tank 1, and the two ends of the manual pump 4 are respectively connected with the one-way valve 6 and the fuel tank 1, Between the manual pump 4 and the one-way valve 6, there is a relief valve 5 connected to the oil tank 1, a pipe type stop valve 7 and a pressure gauge 8, and also includes a three-position four-way neutral M-type manual reversing valve 9 and a flow diverter A flow collecting valve 10, the diversion and flow collection valve 10 is a 1:1 flow diversion and flow collection valve, the pressure port P of the three-position four-way neutral M-type manual reversing valve 9 communicates with the outlet of the one-way valve 6, and the three-position four-way The oil return port T of the middle-position M-type manual reversing valve 9 communicates with the fuel tank 1, and the two oil outlets P1 and P2 of the three-position four-way middle-position M-type manual reversing valve 9 are respectively connected to the ports of the diverting and collecting valve 10. The oil inlet is connected to the outlet of the lock cylinder I11 and the lock cylinder II12, and the two oil outlets of the diverter and collector valve 10 are respectively connected to the oil inlets of the lock cylinder I11 and the lock cylinder II12. An overflow valve 5 communicated with the oil tank 1 is provided between the two oil outlets of 10 and the oil inlets of locking cylinder I11 and locking cylinder II12.

Claims (2)

1. A synchronous hydraulic system for locking the main shaft of a wind power generating set, which includes a check valve, a reversing valve, and a locking cylinder, and is characterized in that it also includes a diverting and collecting valve, and the reversing valve is a three-position four-way position M-type reversing valve, the diverter-collection valve is a 1:1 diverter-collector valve, the pressure port P of the three-position four-way mid-position M-type reversing valve communicates with the outlet of the one-way valve, and the three-position four-way center The oil return port T of the position M-type reversing valve communicates with the oil tank, and the two oil outlets P1 and P2 of the three-position four-way neutral M-type reversing valve are respectively locked with the oil inlet and two ports of the diverting and collecting valve. The outlets of the cylinders communicate with each other, and the two oil outlets of the diverting and collecting valve communicate with the oil inlets of the two locking cylinders respectively. 2. The synchronous hydraulic system for locking the main shaft of a wind power generating set according to claim 1, characterized in that, between the two oil outlets of the diverter-collection valve and the oil inlet of the locking cylinder, there are Relief valve connected to fuel tank.