JP2013167229A - Wind power generator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technique for enabling improvement in cooling efficiency of a radiator of a wind power generator to enable reduction of the physical size of the radiator.SOLUTION: A wind power generator 1 includes: a windmill rotor 4; a nacelle 3 supporting the windmill rotor 4; a radiator 7 disposed outside the nacelle 3; and a diffuser 8. The radiator 7 is disposed on a path where air flows from the upstream of the wind power generator 1 into a negative pressure region formed by the diffuser 8.

Description

  The present invention relates to a wind turbine generator, and more particularly to a technique for cooling various devices mounted on the wind turbine generator.

  Various internal devices (for example, main bearings, speed increasers, generators, etc.) are mounted on the wind power generator. In order to properly operate such an internal device, it is necessary to control the temperature of the internal device within a temperature range suitable for operation.

  In order to control the temperature of internal equipment, a wind power generator is generally provided with a temperature control system. As an example, a heater and a radiator are provided in an oil temperature control system of an oil piping system including a blade pitch system, a speed increaser, and a main bearing, and a heater and a radiator are provided in a cooling water temperature control system of an inverter cooling piping system. A radiator is provided. Most commonly, the tower and / or nacelle are provided with inlets and outside air is taken into the tower and / or nacelle. Air taken in the tower and / or nacelle is applied to the radiator by a fan. The radiator exchanges heat with air or oil or cooling water taken into the tower and / or nacelle to cool the oil or cooling water.

  It is also considered to eliminate the fan by providing a radiator outside the nacelle. By providing the radiator outside the nacelle, outside air can be used, and cooling of the internal equipment can be realized without providing a fan. However, if the fan is excluded, the speed of the cooling air passing through the radiator becomes slow and the air volume becomes small, so that it becomes necessary to increase the size of the radiator.

  A wind power generator in which a radiator is provided outside the nacelle is disclosed in, for example, International Publication WO2010 / 085960. FIG. 1 is a side view showing a configuration of a wind turbine generator disclosed in this international publication. A radiator 103 is mounted on the nacelle 101, and a cover 105 is provided so as to cover the radiator 103. Wind power generators having a similar structure are also disclosed in International Publications WO2010 / 085960, WO2010 / 085962, and WO2010 / 085963.

  However, according to the inventor's study, there is room for further improving the cooling efficiency of the radiator in the above-described wind turbine generator. If the cooling efficiency of the radiator is improved, as a result, the size of the radiator can be reduced.

International Publication WO2010 / 085960 International publication WO2010 / 085961 International Publication WO2010 / 085962 International publication WO2010 / 085963

"Development of wind lens micro windmill" Journal of the Japan Society of Mechanical Engineers, vol. 107, no. 1028, 20044.7, p. 50 Takashi Sugaya et al., “Wind collection effect by hollow structure”, Nagare, vol. 22 (2003), pp. 337-343

  Accordingly, an object of the present invention is to provide a technique for improving the cooling efficiency of a radiator of a wind power generator and making the size of the radiator small.

  In one aspect of the present invention, a wind turbine generator includes a wind turbine rotor, a nacelle that supports the wind turbine rotor, a radiator provided outside the nacelle, and a diffuser. The radiator is provided in a path through which air flows into the negative pressure region formed by the diffuser from the upstream side of the wind turbine generator.

  In one embodiment, the diffuser includes a first diffuser member provided to face the nacelle. The first diffuser member has a first cross section and a second cross section perpendicular to the rotation axis of the wind turbine rotor in a region sandwiched between the nacelle and the surface facing the nacelle of the first diffuser member, and the second cross section is the first cross section. If it is defined to be located downstream of the flow of air passing through the radiator, the area of the second cross section is arranged to be larger than the area of the first cross section.

  In a preferred embodiment, the first diffuser member comprises a first body portion and a first collar portion joined to the first body portion downstream of the first body portion, the first collar portion being a first body. It is bent from the part in the opposite direction of the nacelle.

  It is also preferable that a gap is provided between the first diffuser member and the radiator.

  When a gap is provided between the first diffuser member and the radiator, the first diffuser member has an intersecting line between a surface facing the nacelle of the first diffuser member and a vertical surface including the rotation axis of the wind turbine rotor in a direction opposite to the nacelle. It is also preferable to be curved so as to be smoothly curved.

  It is also preferable that the vicinity of the front edge of the first diffuser member is curved in the direction opposite to the nacelle.

  In one embodiment, the diffuser includes second and third diffuser members that are positioned laterally of the radiator with respect to the direction of air flow flowing into the radiator and are opposed to each other with the radiator interposed therebetween. The second diffuser member has a first surface that faces the third diffuser member, and the third diffuser member has a second surface that faces the second diffuser member. The second and third diffuser members have a third cross section and a fourth cross section perpendicular to the rotation axis of the wind turbine rotor in a region sandwiched between the first surface and the second surface, and the fourth cross section is the third cross section. When it is defined so as to be located downstream of the cross section of the air flow passing through the radiator, the fourth cross section is arranged so that the area of the fourth cross section is larger than the area of the third cross section.

  In a preferred embodiment, the second diffuser member comprises a second body portion and a second collar portion joined to the second body portion downstream of the second body portion, and the third diffuser member is the third body portion. And a third collar portion joined to the third main body portion on the downstream side of the third main body portion. The second collar portion is bent from the second body portion in the direction opposite to the third diffuser member, and the third collar portion is bent from the third body portion in the direction opposite to the third diffuser member.

  It is also preferable that a gap is provided between the second diffuser member and the radiator, and a gap is provided between the third diffuser member and the radiator.

  When a gap is provided between the second diffuser member and the radiator, and a gap is provided between the third diffuser member and the radiator, the second diffuser member is the first surface of the second diffuser member and the rotating shaft of the wind turbine rotor. Are intersected so that the intersecting line of the vertical surface smoothly curves in the direction opposite to the third diffuser member, and the third diffuser member is a vertical surface including the second surface of the third diffuser member and the rotation axis of the wind turbine rotor. It is also preferable that the intersecting line is curved so as to be smoothly curved in the direction opposite to the second diffuser member.

  It is also preferable that a gap be provided between the nacelle and the radiator.

  In a preferred embodiment, the nacelle comprises a front portion and a rear portion located downstream of the front portion, and the radiator is joined to a rear portion at a height lower than the height of the front portion.

  Further, when the nacelle exhaust port for discharging the nacelle exhaust from the inside of the outer nacelle is formed in the nacelle, it is also preferable that the nacelle exhaust port is located on the downstream side of the radiator.

  ADVANTAGE OF THE INVENTION According to this invention, the cooling efficiency of the radiator of a wind power generator can be improved, and the physique of a radiator can be made small.

It is a side view which shows the structure of the conventional wind power generator. It is a side view which shows the structure of the wind power generator of the 1st Embodiment of this invention. It is a perspective view which shows the structure of the wind power generator of 1st Embodiment. It is a top view which shows arrangement | positioning of the radiator and side part diffuser member in 1st Embodiment. It is a side view which shows arrangement | positioning of the nacelle and upper diffuser member in 1st Embodiment. It is a side view which shows the modification of the wind power generator of 1st Embodiment. It is a side view which shows the structure of the wind power generator of the 2nd Embodiment of this invention. It is a perspective view which shows the structure of the wind power generator of 2nd Embodiment. It is a top view which shows arrangement | positioning of the radiator and side part diffuser member in 2nd Embodiment. It is a side view which shows arrangement | positioning of the nacelle and upper diffuser member in 2nd Embodiment. It is a side view which shows other arrangement | positioning of the nacelle and upper diffuser member in 2nd Embodiment. It is a side view which shows arrangement | positioning of the radiator and side part diffuser member in 2nd Embodiment. It is a side view which shows the structure of the wind power generator of the 3rd Embodiment of this invention. It is a perspective view which shows the structure of the wind power generator of 3rd Embodiment. It is a side view which shows the modification of the wind power generator of 3rd Embodiment. It is a side view which shows the other modification of the wind power generator of 3rd Embodiment. It is a perspective view of the wind power generator of FIG. 7A. It is a top view which shows arrangement | positioning of the radiator and side part diffuser member in the wind power generator of FIG. 7A. It is a side view which shows the structure of the wind power generator of the 4th Embodiment of this invention. It is a perspective view which shows the structure of the wind power generator of 4th Embodiment. It is a perspective view which shows the modification of the wind power generator of 4th Embodiment. It is a top view which shows arrangement | positioning of the radiator and side part diffuser member in the modification of the wind power generator of 4th Embodiment. It is a side view which shows the structure of the wind power generator of the 5th Embodiment of this invention. It is a perspective view which shows the structure of the wind power generator of 5th Embodiment. It is a side view which shows the structure of the upper diffuser member in 5th Embodiment. It is a top view which shows the structure of the side part diffuser member in 5th Embodiment. It is a perspective view which shows the modification of the structure of the wind power generator of 5th Embodiment. It is a top view which shows arrangement | positioning of the radiator and side part diffuser member in the wind power generator of FIG. 9E. It is a side view which shows the structure of the wind power generator of the 6th Embodiment of this invention. It is a perspective view which shows the structure of the wind power generator of 6th Embodiment. It is a side view which shows the structure of the wind power generator of the 7th Embodiment of this invention. It is a side view which shows the structure of the wind power generator of the 8th Embodiment of this invention.

First embodiment:
FIG. 2A is a side view showing the configuration of the wind turbine generator 1 according to the first embodiment of the present invention, and FIG. 2B is a perspective view. Referring to FIG. 2A, the wind power generator 1 includes a tower 2, a nacelle 3 mounted on the tower 2, and a windmill rotor 4 rotatably supported by the nacelle 3. The wind turbine rotor 4 includes a hub 5 and a wind turbine blade 6 and receives the wind to rotate around the rotation shaft 4a.

  In the wind turbine generator 1 of this embodiment, the radiator 7 for cooling the tower 2 and the internal device 20 of the nacelle 3 is mounted outside the nacelle 3. 2A and 2B, the radiator 7 is mounted on the upper surface of the nacelle 3. The radiator 7 receives oil and cooling water from the internal device 20, cools the oil and cooling water with the air passing through the radiator 7, and returns it to the internal device 20. Thereby, the internal device 20 is maintained at an appropriate temperature. In FIG. 2A, the air flow through the radiator 7 is indicated by reference numeral 10.

  In addition, a diffuser 8 is provided in the vicinity of the radiator 7. As will be described later, the diffuser 8 has a function of accelerating the flow of air and increasing the amount of air passing through the radiator 7.

  As illustrated in FIGS. 2A to 2D, in the present embodiment, the diffuser 8 includes an upper diffuser member 8a and side diffuser members 8b and 8c. Note that FIG. 2A shows a side view with the side diffuser members 8b and 8c removed, and FIG. 2C is a top view of the radiator 7 and the side diffuser members 8b and 8c. The upper diffuser member 8a is attached to the upper surface of the radiator 7 at its front edge 21, and the side diffuser members 8b and 8c are attached to the side surface of the radiator 7 at its front edges 23a and 23b. The side diffuser members 8 b and 8 c are located in the lateral direction of the radiator 7 with respect to the direction of the air flow flowing into the radiator 7, and are provided so as to sandwich the radiator 7.

  As shown in FIG. 2D, the upper diffuser member 8 a is perpendicular to the rotation shaft 4 a of the wind turbine rotor 4 in a region sandwiched between the inner surface (the surface facing the nacelle 3) of the upper diffuser member 8 a and the nacelle 3. When such two cross sections are considered, the cross section area located on the downstream side of the air flow passing through the radiator 7 is arranged to be larger than the cross section located on the upstream side. More specifically, the area of the cross section S1 perpendicular to the rotating shaft 4a of the wind turbine rotor 4 in a region sandwiched between the inner surface of the upper diffuser member 8a and the nacelle 3 monotonously increases from the front edge 21 toward the rear edge 22. It has such a shape. In the present embodiment, the upper diffuser member 8 a is configured as a plate-like member in which the rear edge 22 is farther from the nacelle 3 than the front edge 21.

  On the other hand, as shown in FIG. 2C, the side diffuser members 8b and 8c have an area of a cross section S2 perpendicular to the rotating shaft 4a of the wind turbine rotor 4 in a region sandwiched between the inner surfaces of the side diffuser members 8b and 8c. The shape increases from the front edges 23a and 23b toward the rear edges 24a and 24b. Here, the inner surface of the side diffuser member 8b means a surface facing the side diffuser member 8c, and the inner surface of the side diffuser member 8c means a surface facing the side diffuser member 8b. ing. In the present embodiment, the side diffuser members 8b and 8c are configured as plate-like members arranged so that the distance between the rear edges 24a and 24b is larger than the distance between the front edges 23a and 23b. Yes.

  The diffuser 8 configured as described above accelerates the air flow in the vicinity of the outlet thereof, and forms a negative pressure region 9 (that is, a region where the pressure is lower than the surroundings) downstream of the diffuser 8. When the negative pressure region 9 is formed, an action of taking in air from the upstream side of the radiator 7 occurs, and the amount of air passing through the radiator 7 can be increased. As a result, the cooling efficiency of the radiator can be improved, and as a result, the size of the radiator can be reduced.

  Here, in general, as a structure for accelerating the air flow, a nozzle that is a hollow structure having a smaller outlet area than the inlet area is used, and a hollow structure having a larger outlet area than the inlet area. Body diffusers are often used to slow down the flow of air. At first glance, this seems to contradict the above action. However, such a discussion is not valid when the hollow structure is placed in an open space. For example, “Development of a wind lens micro windmill”, Journal of the Japan Society of Mechanical Engineers, vol. 107, no. 1028, 20044.7, p. 50 and Takashi Sugaya et al., “Wind collection effect by hollow structure”, Nagare, vol. 22 (2003), pp. As disclosed in 337-343, when placed in an open space, the diffuser acts to accelerate the flow of air. The diffuser 8 of the present embodiment also has an effect of accelerating the air flow and increasing the amount of air passing through the radiator 7.

  2A to 2D, the radiator 7 is provided at the inlet (front edges 21, 23 a, 23 b) of the diffuser 8, but the position of the radiator 7 can be changed inside the diffuser 8. It suffices if it is located in a path through which air flows into the negative pressure region 9 formed by the diffuser 8. For example, as shown in FIG. 3, the radiator 7 may be provided at an intermediate position of the diffuser 8. (Also, in other embodiments described below, the radiator 7 may be provided at an intermediate position of the diffuser 8).

Second embodiment:
FIG. 4A is a side view showing the configuration of the wind turbine generator 1 according to the second embodiment of the present invention, FIG. 4B is a perspective view, and FIG. 4C shows the configuration of the diffuser 8 in the second embodiment. It is a top view. The wind turbine generator 1 of the second embodiment has a structure similar to that of the wind turbine generator 1 of the first embodiment, but the structure of the diffuser 8 is different.

  Specifically, as illustrated in FIG. 4D, in the present embodiment, the upper diffuser member 8a includes a main body portion 31a located on the upstream side and a collar portion 31b located on the downstream side. The collar portion 31b is bent in a direction away from the nacelle 3 from the main body portion 31a. Specifically, the main body portion 31a forms an angle α with respect to the rotation axis 4a in the vertical plane including the rotation axis 4a, whereas the collar portion 32b has a rotation axis in the vertical plane including the rotation axis 4a. An angle β larger than the angle α is formed with respect to 4a. Here, the straight lines L1 and L2 illustrated in FIG. 4D are both straight lines parallel to the rotation axis 4a in the vertical plane including the rotation axis 4a.

  Even in the thus configured upper diffuser member 8a, the area of the cross section S1 perpendicular to the rotating shaft 4a of the wind turbine rotor 4 in the region sandwiched between the inner surface of the upper diffuser member 8a and the nacelle 3 varies from the front edge 21 to the rear edge 22. Increase towards However, the rate of increase in the area of the cross section S1 (S1B in FIG. 4D) for the collar portion 31b in the direction parallel to the rotation axis 4a is the increase in the area of the cross section S1 (S1B in FIG. 4D) for the main body portion 31a. Greater than percentage.

  As shown in FIG. 4C, the side diffuser members 8b and 8c have a similar structure. The side diffuser member 8b includes a main body portion 32a located on the upstream side and a collar portion 32b located on the downstream side. The collar portion 32b is bent from the main body portion 32a in a direction away from the side diffuser member 8c. Similarly, the side diffuser member 8c includes a main body portion 33a located on the upstream side and a collar portion 33b located on the downstream side. The collar portion 33b is bent from the main body portion 33a in a direction away from the side diffuser member 8b.

  Even in the side diffuser members 8b and 8c configured as described above, the area of the cross section S2 perpendicular to the rotating shaft 4a of the wind turbine rotor 4 in the region sandwiched between the inner surfaces of the side diffuser members 8b and 8c has the leading edges 23a and 23b. To the trailing edges 24a and 24b. However, the rate of increase in the area of the cross section S2 (S2B in FIG. 4C) about the collar portions 32b and 33b in the direction parallel to the rotation axis 4a is the ratio of the cross section S2 (S2B in FIG. 4C) about the main body portions 32a and 33a. Greater than the rate of area increase.

  In this embodiment, the flow 11 of the air which goes around the diffuser 8 is obstruct | occluded by the effect | action of the collar parts 31b, 32b, 33b provided in the upper diffuser member 8a and the side diffuser members 8b, 8c, and the negative pressure downstream of the diffuser 8 The size of the region 9 is increased. For this reason, more air can be taken in from the area | region of the front of the radiator 7, and the quantity of the air which passes the radiator 7 can be increased further. As a result, the cooling efficiency of the radiator can be further improved, and as a result, the size of the radiator can be reduced.

  As shown in FIG. 4E, the flange portion 31b of the upper diffuser member 8a may be parallel to a plane perpendicular to the rotation shaft 4a. In this case, the angle β is 90 °. Similarly, as illustrated in FIG. 4F, the flange portions 32b and 33b of the side diffuser members 8b and 8c may be parallel to a plane perpendicular to the rotation shaft 4a.

Third embodiment:
FIG. 5A is a side view showing a configuration of a wind turbine generator 1 according to a third embodiment of the present invention, and FIG. 5B is a perspective view. The wind turbine generator 1 of the third embodiment has the same configuration as the wind turbine generator 1 of the second embodiment, but more specifically between the radiator 7 and the diffuser 8, more specifically, the radiator 7 The difference is that a gap 13 is provided between the upper diffuser member 8a. The gap 13 creates an air flow that passes through the diffuser 8 without passing through the radiator 7.

  The air flow through the gap 13 is accelerated as compared to the air flow through the radiator 7. By the action of this accelerated flow, the negative pressure on the downstream side of the radiator 7 is increased, and the amount of air passing through the radiator 7 can be further increased. As a result, the cooling efficiency of the radiator can be further improved, and as a result, the size of the radiator can be reduced.

  The position of the gap that creates the flow of air that passes through the interior of the diffuser 8 without passing through the radiator 7 can be variously changed. For example, as shown in FIG. 6, a gap 14 may be provided between the nacelle 3 and the radiator 7. 7A to 7C, a gap 15a is provided between the side diffuser member 8b and the radiator 7, and a gap 15b is provided between the side diffuser member 8c and the radiator 7. Good. In any case, the magnitude of the negative pressure on the downstream side of the radiator 7 is increased by the flow of air passing through the gaps 14, 15 a, 15 b, and the amount of air passing through the radiator 7 can be further increased.

  5A, FIG. 5B, FIG. 6, and FIG. 7A to FIG. 7C show configurations in which the flange portions 31b, 32b, and 33b are provided on the side diffuser members 8b and 8c, respectively. Similarly to the wind power generator 1 of the first embodiment, the configuration may be such that the collar portions 31b, 32b, and 33b are not provided.

Fourth embodiment:
FIG. 8A is a side view showing a structure of a wind turbine generator 1 according to a fourth embodiment of the present invention, and FIG. 8B is a perspective view. In the wind turbine generator 1 of the fourth embodiment, a gap 13 is provided between the radiator 7 and the upper diffuser member 8a, as in the wind turbine generator 1 illustrated in FIGS. 5A and 5B. In addition, in the present embodiment, the upper diffuser member is formed such that an intersecting line formed by the inner surface of the upper diffuser member 8a and the vertical surface including the rotation shaft 4a becomes a smooth curve that curves in the direction opposite to the nacelle 3. 8a is curved.

  In this case, the area of the cross section S1 perpendicular to the rotation axis 4a of the wind turbine rotor 4 in a region sandwiched between the inner surface of the upper diffuser member 8a and the nacelle 3 monotonously increases from the front edge 21 toward the rear edge 22 and rotates. The rate of increase in the area of the cross section S1 (S1B in FIG. 4D) of the collar portion 31b in the direction parallel to the axis 4a also monotonously increases from the front edge 21 toward the rear edge 22.

  In the present embodiment, the air flow through the gap 13 is further accelerated by the curved shape of the upper diffuser member 8a. As can be understood from Bernoulli's theorem, the amount of air passing through the radiator 7 can be further increased because a larger negative pressure is generated by the acceleration of the air flow. Thereby, the cooling efficiency of the radiator 7 can be further improved, and as a result, the size of the radiator 7 can be reduced.

  As shown in FIGS. 8D and 8E, the same principle can be applied when gaps 15a and 15b are provided between the radiator 7 and the side diffuser members 8b and 8c. In the structure of FIG. 8C, the side diffuser member 8b is formed such that an intersecting line formed by the inner surface of the side diffuser member 8b and a horizontal plane intersecting the inner surface is a smooth curve that curves in the opposite direction to the side diffuser member 8c. Is curved. Similarly, the side diffuser member 8c is curved so that an intersecting line formed by the inner surface of the side diffuser member 8c and a horizontal plane intersecting the inner surface of the side diffuser member 8c becomes a smooth curve that curves in the opposite direction to the side diffuser member 8b. ing. 8D and 8E can accelerate the air flow through the gap 13 to generate a larger negative pressure and further increase the amount of air passing through the radiator 7. it can.

Fifth embodiment:
FIG. 9A is a side view showing a configuration of a wind turbine generator 1 according to a fifth embodiment of the present invention, and FIG. 9B is a perspective view. In the fifth embodiment, a bell mouth 16 is attached to the diffuser 8. The bell mouth 16 is a structure that is provided in the vicinity of the inlet of the flow path formed by the diffuser 8 and that gradually decreases the cross-sectional area of the flow path as the distance from the inlet increases. Serves to reduce pressure loss.

  9A and 9B, a bell mouth 16 is formed in the vicinity of the front edge of the upper diffuser member 8a. Specifically, as shown in FIG. 9C, the upper diffuser member 8a is slightly bent in the direction opposite to the nacelle 3 in the vicinity of the front edge 21, thereby forming the bell mouth 16. In the bell mouth 16 portion of the upper diffuser member 8a, the area of the cross section S1 perpendicular to the rotating shaft 4a of the wind turbine rotor 4 in the region sandwiched between the inner surface of the upper diffuser member 8a and the nacelle 3 increases as the distance from the front edge 21 increases. Monotonously decreases. The area of the cross section S1 is minimized at a specific position. The cross section S1 perpendicular to the rotating shaft 4a of the wind turbine rotor 4 in the region sandwiched between the inner surface of the upper diffuser member 8a and the nacelle 3 increases monotonously as it approaches the rear edge 22 from the specific position.

  As shown in FIG. 9D, bell mouths 16 are also formed on the side diffuser members 8b and 8c. Specifically, the side diffuser member 8b is slightly curved in the direction opposite to the side diffuser member 8c in the vicinity of the front edge 23a, and the side diffuser member 8c is in contact with the side diffuser member 8b in the vicinity of the front edge 23b. It is slightly bent in the opposite direction.

  9A to 9D show a structure in which a gap 13 is provided between the radiator 7 and the upper diffuser member 8a. However, as shown in FIGS. 9E and 9F, the radiator 7 and the side are disposed on the side. Clearances 15a and 15b may be provided between the partial diffuser members 8b and 8c.

  9A to 9F, as in the configuration of the fourth embodiment (see FIGS. 8A to 8C), the upper diffuser member 8a and the side diffuser members 8b and 8c have their inner surfaces and vertical surfaces. Although the structure in which the intersecting line is curved so as to draw a smooth curve is illustrated, the bell mouth 16 may be provided in the diffuser 8 having the structure as in the first to third embodiments.

Sixth embodiment:
FIG. 10A is a side view showing a configuration of a wind turbine generator 1 according to a sixth embodiment of the present invention, and FIG. 10B is a perspective view. In the sixth embodiment, a radiator 7 and a diffuser 8 are provided on the side surface of the nacelle 3. Even in such a case, the amount of air passing through the radiator 7 can be increased by the action of the diffuser 8. As a result, the cooling efficiency of the radiator can be improved, and as a result, the size of the radiator can be reduced.

  The configuration in which the radiator 7 and the diffuser 8 are provided on the side surface of the nacelle 3 as in the present embodiment can be applied to the configuration and arrangement of any of the radiators 7 and the diffuser 8 in the first to fifth embodiments. 10A and 10B illustrate a structure in which the diffuser 8 having the configuration of the first embodiment (FIGS. 2A and 2B) is provided on the side surface of the nacelle 3. The side diffuser member 8 d is attached to the surface of the radiator 7 opposite to the nacelle 3, and the upper diffuser member 8 e is attached to the upper surface of the radiator 7. In addition, a lower diffuser (not shown) is attached to the lower surface of the radiator 7.

Seventh embodiment:
FIG. 11 is a side view showing the configuration of the wind turbine generator 1 according to the seventh embodiment of the present invention. In 6th Embodiment, it is comprised so that the height of the rear part 3b may be lower than the height Ha of the front part 3a of the nacelle 3. FIG. Specifically, in the configuration of FIG. 11, the rear portion 3 b of the nacelle 3 is formed in a shape such that its height decreases toward the rear end of the nacelle 3. In addition, the radiator 7 is attached to the rear portion 3b of the nacelle 3, and the diffuser 8 is provided so as to face the rear portion 3b. The radiator 7 is provided at a position of the rear portion 3b of the nacelle 3 that is lower than the height Ha.

  Such a configuration can increase the amount of air passing through the radiator 7 by the action of the diffuser 8 and is useful for mitigating transportation problems when constructing the wind turbine generator 1. The overall height of the structure in which the radiator 7 and the diffuser 8 are mounted on the nacelle 3 increases. When the height of the structure does not satisfy the restrictions on transportation, it is necessary to attach the radiator 7 and / or the diffuser 8 to the nacelle 3 at the construction site of the wind power generator 1. The man-hour will increase. According to the configuration of the wind turbine generator 1 of the present embodiment, the height of the structure in which the radiator 7 and the diffuser 8 are mounted on the nacelle 3 can be reduced, so that the problem of transportation restriction can be alleviated.

  FIG. 11 shows the case where the radiator 7 and the diffuser 8 have the configuration shown in FIGS. 5A and 5B (configuration of the third embodiment). However, the radiator 7 and the diffuser are illustrated. The structure and arrangement of 8 may be any configuration as in the first to fifth embodiments.

Eighth embodiment:
FIG. 12 is a side view showing the configuration of the wind turbine generator 1 according to the eighth embodiment of the present invention. In the seventh embodiment, a nacelle exhaust port 17 for exhausting nacelle exhaust 18 (air exhausted from the inside of the nacelle 3) is provided downstream of the radiator 7. Even with such a configuration, the amount of air passing through the radiator 7 can be increased by the action of the diffuser 8. In addition, in the configuration of the seventh embodiment, the nacelle exhaust 18 discharged from the nacelle exhaust port 17 flows into the negative pressure region 9 formed by the diffuser 8. Thereby, ventilation of the nacelle 3 is promoted.

  FIG. 12 illustrates the case where the radiator 7 and the diffuser 8 have the configuration illustrated in FIGS. 9A and 9B (the configuration of the fifth embodiment). However, the radiator 7 and the diffuser are illustrated in FIG. The structure and arrangement of 8 may be any configuration as in the first to fifth embodiments.

  Although the embodiments of the present invention are specifically described above, the present invention is not limited to the above-described embodiments, and it is obvious to those skilled in the art that the present invention can be implemented with various modifications. Will. For example, in the above embodiment, the upper diffuser member 8a and the side diffuser members 8b and 8c are provided as separate members, but the upper diffuser member 8a and the side diffuser members 8b and 8c are connected. May be. Further, although a plurality of embodiments are presented above, it should be noted that the above embodiments can be implemented in combination as long as there is no contradiction.

DESCRIPTION OF SYMBOLS 1: Wind power generator 2: Tower 3: Nacelle 3a: Front part 3b: Rear part 4: Windmill rotor 4a: Rotating shaft 5: Hub 6: Windmill blade 7: Radiator 8: Diffuser 8a: Upper diffuser member 8b, 8c: Side part Diffuser member 8d: side diffuser member 8e: upper diffuser member 9: negative pressure region 10, 11: air flow 13, 14, 15a, 15b: gap 16: bell mouth 17: nacelle outlet 18: nacelle exhaust 21, 23a 23b: front edges 22, 24a, 24b: rear edges 31a, 32a, 33a: main body portions 31b, 32b, 33b: collar portions S1, S1A, S1B, S2, S2A, S2B: cross section 101: nacelle 103: radiator 105: cover

Claims (13)

A windmill rotor,
A nacelle supporting the wind turbine rotor;
A radiator provided outside the nacelle;
A wind turbine generator comprising a diffuser,
The wind turbine generator, wherein the radiator is provided in a path through which air flows from an upstream side of the wind turbine generator to a negative pressure region formed by the diffuser. The wind turbine generator according to claim 1,
The diffuser includes a first diffuser member provided to face the nacelle,
In a region sandwiched between the surface facing the nacelle of the first diffuser member and the nacelle, the first cross section and the second cross section perpendicular to the rotation axis of the wind turbine rotor, the second cross section from the first cross section. A wind power generator in which the area of the second cross section is larger than the area of the first cross section when it is defined to be located downstream of the air flow passing through the radiator. The wind turbine generator according to claim 2,
The first diffuser member is
A first body portion;
A first collar portion joined to the first body portion on the downstream side of the first body portion;
The wind power generator, wherein the first collar portion is bent from the first main body portion in a direction opposite to the nacelle. The wind power generator according to claim 2 or 3,
A wind turbine generator in which a gap is provided between the first diffuser member and the radiator. The wind turbine generator according to claim 2,
A gap is provided between the first diffuser member and the radiator;
The first diffuser member is curved so that a line of intersection between a surface of the first diffuser member facing the nacelle and a vertical plane including a rotation axis of the wind turbine rotor is smoothly curved in a direction opposite to the nacelle. Power generation device. A wind power generator according to any one of claims 2 to 5,
A wind turbine generator in which a vicinity of a front edge of the first diffuser member is curved in a direction opposite to the nacelle. The wind power generator according to claim 1 or 2,
The diffuser includes second and third diffuser members that are located in a lateral direction of the radiator with respect to a direction of the air flow flowing into the radiator and are opposed to each other with the radiator interposed therebetween.
The second diffuser member has a first surface facing the third diffuser member;
The third diffuser member has a second surface facing the second diffuser member;
In a region sandwiched between the first surface and the second surface, the third cross section and the fourth cross section that are perpendicular to the rotation axis of the wind turbine rotor are disposed, and the fourth cross section includes the radiator more than the third cross section. The wind power generator when the area of the fourth cross section is larger than the area of the third cross section when it is defined so as to be located downstream of the flow of air passing therethrough. The wind turbine generator according to claim 3,
The second diffuser member is
A second body portion;
A second collar portion joined to the second body portion on the downstream side of the second body portion;
The third diffuser member is
A third body portion;
A third collar portion joined to the third body portion on the downstream side of the third body portion;
The second collar portion is bent from the second main body portion in a direction opposite to the third diffuser member,
The wind power generator, wherein the third collar portion is bent from the third main body portion in a direction opposite to the third diffuser member. The wind power generator according to claim 7 or 8,
A gap is provided between the second diffuser member and the radiator;
A wind turbine generator in which a gap is provided between the third diffuser member and the radiator. The wind power generator according to claim 7,
A gap is provided between the second diffuser member and the radiator;
A gap is provided between the third diffuser member and the radiator;
The second diffuser member is curved so that an intersection line between the first surface of the second diffuser member and a vertical surface including the rotation axis of the wind turbine rotor is smoothly curved in the opposite direction to the third diffuser member,
The third diffuser member is curved so that a line of intersection between the second surface of the third diffuser member and a vertical surface including the rotation axis of the wind turbine rotor is smoothly curved in the opposite direction to the second diffuser member. Wind power generator. The wind turbine generator according to any one of claims 1 to 3, 7, or 8,
A wind turbine generator in which a gap is provided between the nacelle and the radiator. The wind power generator according to any one of claims 1 to 11,
The nacelle is
Comprising a front part and a rear part located downstream of the front part,
The radiator is joined to a position of the rear portion at a height lower than the height of the front portion. The wind turbine generator according to any one of claims 1 to 12,
In the nacelle, a nacelle exhaust port for discharging nacelle exhaust from the nacelle is formed,
The nacelle exhaust port is located on the downstream side of the radiator.

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