CN204511787U - Wind-driven generator wheel-box device - Google Patents

Abstract

The utility model provides a gear box device for a wind power generator. The gear box is driven by a two-stage cylindrical gear and adopts a split structure. The most important parts are low-speed shafting parts and medium-speed shafting parts. The high-speed shafting parts are located on the case cover, and the three shafts are arranged in a triangle. Through the implementation of the utility model, the three shafts in the gearbox adopt a folding structure, which reduces the width of the gearbox, makes the width of the wind generator smaller, and reduces the windward area and size; the low-speed shaft of the gearbox is used as the wind generator The main shaft reduces the separate main shaft structure, and the structure is more compact, which reduces the length of the wind turbine; the high-speed shaft coupling and the gear box part are juxtaposed, which reduces the length occupied by the coupling alone, making the length of the whole machine again Reduced; the waterproof rubber ring installed outside the low-speed shaft sealing ring can effectively prevent rainwater from penetrating into the box.

Description

Wind turbine gearbox device

technical field

The utility model relates to a gear box device of a wind power generator, which is particularly suitable for a speed-increasing mechanism of a small and medium-sized wind power generator.

Background technique

Wind turbines usually have a low rotor speed and high torque. The doubly-fed generator set needs to use a speed-increasing gearbox to increase the speed and transmit the high speed and small torque to the doubly-fed generator. In the past, doubly-fed wind turbines mainly developed large-scale megawatt-level units, and the developed gearboxes were also above megawatt-level. With the popularization and application of distributed power generation technology, small and medium-sized wind turbines have shown the advantages of easy manufacture, installation and use. At present, the common small and medium-sized wind turbines on the market are generally direct-drive permanent magnet units, which are characterized by low speed, no need for a gearbox to increase speed, and simple structure, but the cost of the permanent magnet generator used is relatively high, and the required starting wind speed is relatively high Large, and the flow conversion technology is more complicated. The doubly-fed wind turbine is cheap to manufacture, the starting wind speed is low, and the flow conversion technology is simple. The disadvantage is that it needs a speed-up gearbox and coupling, and the structural size is too large. It can be used for gears of small and medium-sized double-fed wind turbine There are very few gearboxes, especially those with tens to one hundred kilowatts.

Contents of the invention

Purpose of the utility model: The utility model provides a wind power generator gearbox device, and its purpose is to solve the problems existing in the speed-up of the small and medium-sized double-fed wind power generators.

Technical solution: the utility model is realized through the following technical solutions:

A wind power generator gearbox device, characterized in that: the gearbox device box is divided into two parts, the box cover and the box seat, the low-speed shaft passes through the box body, the medium-speed shaft is arranged in the box body, and the box cover is set There is a high-speed shaft, and a low-speed large gear is arranged on the low-speed shaft. The low-speed large gear meshes with a low-speed small gear arranged on the medium-speed shaft. A high-speed large gear is also arranged on the medium-speed shaft. The high-speed large gear The gear meshes with the high-speed stage pinion arranged on the high-speed shaft, and an output half-coupling is arranged at one end of the high-speed shaft.

The low-speed shaft, the medium-speed shaft and the high-speed shaft form a triangular arrangement with the high-speed shaft on top.

The low-speed shaft also serves as the main shaft of the wind turbine. A low-speed shaft seal ring is installed at the position where the front end of the low-speed shaft passes through the box. A waterproof rubber ring is installed on the surface of the low-speed shaft outside the low-speed shaft seal ring. The waterproof rubber ring is hooped on the low-speed shaft. Surface, and rotate with the shaft, the end face of the waterproof rubber ring is against the end face of the sealing ring.

The low-speed shaft is a hollow structure with a cavity for cables to pass through. The front flange of the low-speed shaft has bolt holes for connecting the wind wheel; the rear end of the low-speed shaft also has threaded holes for connecting slip rings. .

The length of the high-speed shaft and medium-speed shaft of the gearbox is shorter than that of the low-speed shaft, and the corresponding box part is also narrower. The output half-coupling is set at this short section, and the output half-coupling is parallel to the low-speed shaft. .

Advantages and effects: The utility model provides a gear box device for wind power generators. The gear box is a two-stage cylindrical gear transmission, which adopts a split structure and is divided into two parts: the box cover and the box seat, which are connected and fixed by bolts. On the split surface are low-speed shafting parts and medium-speed shafting parts, high-speed shafting parts are located on the case cover, and the three shafts are arranged in a triangle. Low-speed shafting parts mainly include low-speed shafts, low-speed gears, seal rings and bearings; medium-speed shafting parts mainly include low-speed pinions, high-speed gears and bearings; high-speed shafting parts mainly include high-speed Stage pinions, bearings, seals and output half-couplings. The low-speed shaft is longer, and the part of the gearbox housing where the low-speed shaft is installed is wider. The low-speed shaft has a hollow structure, the front end is a connecting flange, the flange has bolt holes for connecting, and the rear end also has threaded holes for connecting. A waterproof rubber ring is also installed on the shaft surface outside the low-speed shaft sealing ring.

Through the implementation of the utility model, the three shafts in the gearbox adopt a folding structure, which reduces the width of the gearbox, makes the width of the wind generator smaller, and reduces the windward area and size; the low-speed shaft of the gearbox is used as the wind generator The main shaft reduces the separate main shaft structure, and the structure is more compact, which reduces the length of the wind turbine; the high-speed shaft coupling and the gear box part are juxtaposed, which reduces the length occupied by the coupling alone, making the length of the whole machine again Reduced; the waterproof rubber ring installed outside the low-speed shaft sealing ring can effectively prevent rainwater from penetrating into the box.

Description of drawings:

Figure 1 is a schematic diagram of the internal structure of the utility model.

Figure 2 is a schematic diagram of the front end of the utility model.

Figure 3 is a schematic side view of the utility model.

In Figure 1, label 1—low speed shaft (main shaft); 2—waterproof rubber ring; 3—low speed shaft sealing ring; 4—medium speed shaft; 5—high speed shaft; 6—high speed pinion gear; 7—high speed gear ; 7—high-speed shaft half-coupling; 9—low-speed pinion gear; 10—low-speed gear.

The specific embodiment: the utility model is further described below in conjunction with the accompanying drawings:

As shown in Figure 1, the utility model provides a gear box device for a wind power generator. The box body of the gear box device is divided into two parts: the box cover and the box seat. The low-speed shaft 1 passes through the box body, and the medium-speed shaft 4 is arranged In the body, a high-speed shaft 5 is arranged on the case cover, and a low-speed large gear 10 is arranged on the low-speed shaft 1. The low-speed large gear 10 meshes with the low-speed pinion 9 arranged on the medium-speed shaft 4, and on the medium-speed shaft 4 is also provided with a high-speed bull gear 7, which meshes with the high-speed pinion 6 arranged on the high-speed shaft 5, and an output half-coupling 8 is arranged at one end of the high-speed shaft 5.

The low-speed shaft 1, the medium-speed shaft 4, and the high-speed shaft 5 form a triangular arrangement with the high-speed shaft 5 on top. That is to say, the line connecting the centers of the three shaft sections forms a triangle with the high-speed shaft 5 on top.

The low-speed shaft 1 also serves as the main shaft of the wind turbine. A low-speed shaft sealing ring 3 is installed at the position where the front end of the low-speed shaft 1 passes through the box. A waterproof rubber ring 2 is also installed on the surface of the low-speed shaft 1 outside the low-speed shaft sealing ring 3. The rubber ring 2 is hooped on the surface of the low-speed shaft 1 and rotates together with the shaft, and the end face of the waterproof rubber ring 2 is against the end face of the sealing ring 3 .

The low-speed shaft 1 is a hollow structure with a cavity for cables to pass through. The front flange of the low-speed shaft 1 has bolt holes for connecting the wind wheel; the rear end of the low-speed shaft 1 is also used for connecting slip rings. threaded holes.

The lengths of the high-speed shaft 5 and the medium-speed shaft 4 of the gearbox are both shorter than the low-speed shaft 1, and the corresponding box part is also narrower. Parallel to the low-speed shaft 1 part.

The utility model adopts two-stage cylindrical gear transmission, and the gear box is a split structure, which is divided into two parts, the box base and the box cover, which are connected and fixed together by bolts. Located on the split plane are low-speed shafting parts and medium-speed shafting parts, and high-speed shafting parts are located on the case cover. Low-speed shafting parts mainly include low-speed shaft 1, waterproof rubber ring 2, sealing ring 3, low-speed large gear 10 and bearings, etc.; medium-speed shafting parts mainly include medium-speed shaft 4, low-speed pinion 9, high-speed gear Large gear 7 and bearings, etc.; high-speed shaft components mainly include high-speed shaft 5, high-speed pinion gear 6, bearings, sealing rings and output half-couplings 8, etc., and three shafts in the secondary gear transmission mechanism form high-speed shaft 5 The triangular arrangement on the top makes the overall width smaller and the structure more compact. The low-speed shaft 1 also serves as the main shaft of the wind turbine, and because it is longer, the gearbox housing is wider at the part where the low-speed shaft 1 is installed. The waterproof rubber ring 2 outside the low-speed shaft sealing ring 3 can stop the rainwater entering the cabin from penetrating into the casing along the low-speed shaft 1 through the sealing ring 3 . The low-speed shaft 1 is a hollow structure for cables to pass through. There are connecting bolt holes on the front flange for connecting the wind wheel; the rear end also has threaded holes for connecting slip rings. The high-speed shaft 5 and the medium-speed shaft 4 of the gearbox have a narrow box width, and the high-speed output half-coupling 8 is placed in this narrow part, parallel to the low-speed shaft 1, so that the high-speed shaft 5 and the high-speed output half-coupling The length of the shaft device 8 will not exceed the low-speed shaft 1, so that the length of the entire box will not be greater than the shaft length of the low-speed shaft 1, so that the output half-coupling 8 is connected with the half-coupling on the generator shaft, so that The length of the unit occupied by the coupling can be shortened, and the length of the whole machine can be shortened again.

Claims (5)

1. A gearbox device for a wind power generator, characterized in that: the box body of the gearbox device is divided into two parts, the box cover and the box seat, the low-speed shaft (1) passes through the box body, and the medium-speed shaft (4) is arranged on Inside the box, a high-speed shaft (5) is set on the box cover, and a low-speed gear (10) is set on the low-speed shaft (1). The low-speed gear (10) is connected with the medium-speed shaft (4). The low-speed pinion (9) meshes with the high-speed bull gear (7) on the medium-speed shaft (4). The high-speed bull gear (7) and the high-speed pinion on the high-speed shaft (5) (6) meshing, an output half-coupling (8) is provided at one end of the high-speed shaft (5). 2. The wind turbine gearbox device according to claim 1, characterized in that: the low-speed shaft (1), the medium-speed shaft (4) and the high-speed shaft (5) form a triangle with the high-speed shaft (5) on top layout. 3. The wind turbine gearbox device according to claim 2, characterized in that: the low-speed shaft (1) doubles as the main shaft of the wind turbine, and a low-speed shaft is provided at the position where the front end of the low-speed shaft (1) passes through the box Sealing ring (3), the surface of the low-speed shaft (1) outside the low-speed shaft sealing ring (3) is also installed with a waterproof rubber ring (2), and the waterproof rubber ring (2) is hooped on the surface of the low-speed shaft (1) and Rotate together, the end face of the waterproof rubber ring (2) is against the end face of the sealing ring (3). 4. The wind turbine gearbox device according to claim 3, characterized in that: the low-speed shaft (1) is a hollow structure with a cavity for cables to pass through, and the front end flange of the low-speed shaft (1) There are bolt holes for connecting the wind wheel; the rear end of the low-speed shaft (1) also has threaded holes for connecting the slip ring. 5. The wind turbine gearbox device according to claim 4, characterized in that: the lengths of the high-speed shaft (5) and the medium-speed shaft (4) of the gearbox are both shorter than the low-speed shaft (1), and the corresponding box The body part is also narrow, and the output half-coupling (8) is arranged at this shorter part, and the output half-coupling (8) is parallel to the low-speed shaft (1).