阅读说明：本技术 一种变桨控制系统的散热装置和控制方法 (Heat dissipation device and control method of variable pitch control system ) 是由 吴宇 彭锟 冯冠豪 李孜祥 舒华英 席周悦 邓明进 周愫愫 赵超 张新丽 姚杰 于 2020-12-07 设计创作，主要内容包括：本发明公开了一种变桨控制系统的散热装置和控制方法,该散热装置包括：柜体,内部设置有变桨驱动器,底部设置有散热孔；导热板,设置在所述柜体内并与所述柜体的内侧配合形成散热腔,用于将所述变桨驱动器产生的热量传导入所述散热腔；散热风扇,安装在所述散热腔内且与所述变桨驱动器电性连接,用于在启动后将散热腔内的热量从所述散热孔吹出；温度传感器,与所述变桨驱动器电性连接,用于检测所述变桨驱动器的驱动器温度；所述变桨驱动器,用于根据所述驱动器温度控制所述散热风扇,从而提高了变桨控制系统的散热效率。(The invention discloses a heat dissipation device and a control method of a variable pitch control system, wherein the heat dissipation device comprises: the variable-pitch drive is arranged in the cabinet body, and heat dissipation holes are formed in the bottom of the cabinet body; the heat conducting plate is arranged in the cabinet body and matched with the inner side of the cabinet body to form a heat dissipation cavity for conducting heat generated by the variable-pitch driver into the heat dissipation cavity; the cooling fan is arranged in the cooling cavity, is electrically connected with the variable-pitch driver and is used for blowing heat in the cooling cavity out of the cooling hole after being started; the temperature sensor is electrically connected with the variable pitch driver and used for detecting the temperature of the driver of the variable pitch driver; the variable-pitch driver is used for controlling the cooling fan according to the temperature of the driver, so that the cooling efficiency of the variable-pitch control system is improved.)

1. A heat sink for a pitch control system, the heat sink comprising:

the variable-pitch drive is arranged in the cabinet body, and heat dissipation holes are formed in the bottom of the cabinet body;

the heat conducting plate is arranged in the cabinet body and matched with the inner side of the cabinet body to form a heat dissipation cavity for conducting heat generated by the variable-pitch driver into the heat dissipation cavity;

the cooling fan is arranged in the cooling cavity, is electrically connected with the variable-pitch driver and is used for blowing heat in the cooling cavity out of the cooling hole after being started;

the temperature sensor is electrically connected with the variable pitch driver and used for detecting the temperature of the driver of the variable pitch driver;

the variable pitch driver is used for controlling the cooling fan according to the temperature of the driver.

2. The heat dissipating device of claim 1, wherein the number of heat dissipating fans is multiple, and the pitch drive is specifically configured to:

determining the starting number of the heat dissipation fans according to the temperature of the driver;

and controlling the cooling fan according to the starting number and a preset starting sequence.

3. The heat dissipating device of claim 2, wherein the heat dissipating fan comprises a first fan assembly and a second fan assembly arranged in a single row, the pitch drive further being specifically configured to:

if the temperature of the driver is higher than a first set temperature and not higher than a second set temperature, starting the fans in the first fan combination and keeping the preset time length;

and acquiring a new driver temperature, and if the new driver temperature is higher than the first set temperature and not higher than the second set temperature, stopping the fans in the first fan combination and starting the fans in the second fan combination.

4. The heat sink of claim 3, wherein the pitch drive is further specific to:

and if the temperature of the driver is higher than the second set temperature, starting the fan in the first fan combination and the fan in the second fan combination.

5. The heat sink of claim 4, wherein an average distance of the fans in the first fan assembly to a maximum temperature point is less than an average distance of the fans in the second fan assembly to the maximum temperature point, the maximum temperature point being a maximum temperature point on the surface of the pitch drive when both the first fan assembly and the first fan assembly are stopped.

6. The heat dissipating device of claim 4, wherein said first fan assembly and said second fan assembly each comprise two fans.

7. The heat sink of claim 1, wherein the thermally conductive plate is in face contact with an outer surface of the pitch drive.

8. The heat dissipating device of claim 1, wherein the heat conducting plate is made of aluminum and the heat dissipating fan is an axial fan.

9. A heat dissipation control method of a pitch control system, wherein the method is applied to the heat dissipation device of any one of claims 1-8, and the method comprises the following steps:

the variable-pitch driver controls the heat dissipation fan according to the temperature of the driver.

10. The method according to claim 9, wherein the number of the heat dissipation fans is plural, and the pitch drive controls the heat dissipation fans according to the temperature of the drive, specifically:

the variable-pitch driver determines the starting number of the heat dissipation fans according to the temperature of the driver;

and controlling the cooling fan according to the starting number and a preset starting sequence.

Technical Field

The application relates to the field of new energy wind power generation variable pitch control, in particular to a heat dissipation device and a control method of a variable pitch control system.

Background

Wind energy has received wide attention as a pollution-free and renewable energy source, is developed rapidly, and has a wide development prospect in wind power generation in China. In recent years, wind generating sets have undergone rapid development from tens of kilowatts to hundreds of kilowatts to megawatts, and high-power wind generating sets have higher requirements on functions of a variable pitch system. The improvement of power is often accompanied with the increase of calorific capacity, and the heat dissipation problem of high-power devices in the variable pitch cabinet influences the performance, the service life and the like of the variable pitch control system, so the heat dissipation performance of the variable pitch control system is very important.

The high-power devices in the variable pitch control system mainly comprise a variable pitch driver, a super capacitor and the like; the high-power devices are arranged in a variable pitch control cabinet, and the variable pitch control cabinet is arranged in a hub of the wind generating set and rotates along with the rotation of the hub. When the super capacitor works normally, the heat productivity is small, so the heat dissipation scheme of the variable pitch driver is mainly considered. The heat dissipation of a high-power device in the existing variable pitch control system is mainly the heat dissipation of a cold plate, but the control mode is simple, the heat dissipation capability of a heat dissipation device cannot be adjusted in real time according to the actual working condition and the current heat productivity of the variable pitch control system, and the heat dissipation efficiency is low.

Therefore, how to provide a heat dissipation device of a pitch control system, which can improve the heat dissipation efficiency, is a technical problem to be solved at present.

Disclosure of Invention

The invention provides a heat dissipation device of a variable pitch control system, which is used for solving the technical problem that the heat dissipation efficiency of the variable pitch control system in the prior art is low.

The heat dissipating double-fuselage includes:

the variable-pitch drive is arranged in the cabinet body, and heat dissipation holes are formed in the bottom of the cabinet body;

the heat conducting plate is arranged in the cabinet body and matched with the inner side of the cabinet body to form a heat dissipation cavity for conducting heat generated by the variable-pitch driver into the heat dissipation cavity;

the cooling fan is arranged in the cooling cavity, is electrically connected with the variable-pitch driver and is used for blowing heat in the cooling cavity out of the cooling hole after being started;

the temperature sensor is electrically connected with the variable pitch driver and used for detecting the temperature of the driver of the variable pitch driver;

the variable pitch driver is used for controlling the cooling fan according to the temperature of the driver.

In some embodiments of the present application, the number of the heat dissipation fans is multiple, and the pitch drive is specifically configured to:

determining the starting number of the heat dissipation fans according to the temperature of the driver;

and controlling the cooling fan according to the starting number and a preset starting sequence.

In some embodiments of the present application, the heat dissipation fan comprises a first fan assembly and a second fan assembly arranged in a single row, and the pitch drive is further specifically configured to:

if the temperature of the driver is higher than a first set temperature and not higher than a second set temperature, starting the fans in the first fan combination and keeping the preset time length;

and acquiring a new driver temperature, and if the new driver temperature is higher than the first set temperature and not higher than the second set temperature, stopping the fans in the first fan combination and starting the fans in the second fan combination.

In some embodiments of the present application, the pitch drive is further specifically configured to:

and if the temperature of the driver is higher than the second set temperature, starting the fan in the first fan combination and the fan in the second fan combination.

In some embodiments of the present application, an average distance of the fans of the first fan combination to a maximum temperature point is less than an average distance of the fans of the second fan combination to the maximum temperature point, the maximum temperature point being a maximum temperature point on the surface of the pitch drive when both the first fan combination and the first fan combination are stopped.

In some embodiments of the present application, the first fan assembly and the second fan assembly each include two fans.

In some embodiments of the present application, the heat-conducting plate is in face contact with an outer surface of the pitch drive.

In some embodiments of the present application, the heat conducting plate is made of aluminum, and the heat dissipating fan is an axial flow fan.

Correspondingly, the invention also provides a heat dissipation control method of the variable pitch control system, which is applied to the heat dissipation device, and the method comprises the following steps:

the variable-pitch driver controls the heat dissipation fan according to the temperature of the driver.

In some embodiments of the present application, the number of the heat dissipation fans is plural, and the variable pitch driver controls the heat dissipation fans according to the temperature of the driver, specifically:

the variable-pitch driver determines the starting number of the heat dissipation fans according to the temperature of the driver;

and controlling the cooling fan according to the starting number and a preset starting sequence.

Compared with the prior art, the invention has the following beneficial effects:

the invention discloses a heat dissipation device of a variable pitch control system, which comprises: the variable-pitch drive is arranged in the cabinet body, and heat dissipation holes are formed in the bottom of the cabinet body; the heat conducting plate is arranged in the cabinet body and matched with the inner side of the cabinet body to form a heat dissipation cavity for conducting heat generated by the variable-pitch driver into the heat dissipation cavity; the cooling fan is arranged in the cooling cavity, is electrically connected with the variable-pitch driver and is used for blowing heat in the cooling cavity out of the cooling hole after being started; the temperature sensor is electrically connected with the variable pitch driver and used for detecting the temperature of the driver of the variable pitch driver; the variable-pitch driver is used for controlling the cooling fan according to the temperature of the driver, so that the cooling efficiency of the variable-pitch control system is improved, the variable-pitch driver can adjust the cooling capacity of the cooling device in real time according to the actual working condition and the current heating value, and the long service life of the cooling fan is favorably maintained while the requirement of high-power cooling is met.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural diagram illustrating a heat dissipation device of a pitch control system according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a heat dissipation device of a pitch control system according to another embodiment of the invention;

FIG. 3 is a control circuit diagram of an axial flow fan in the embodiment of the present invention;

fig. 4 is a schematic flow chart illustrating a heat dissipation control method of a pitch control system according to an embodiment of the present invention;

fig. 5 is a schematic flow chart illustrating a heat dissipation control method of a pitch control system according to another embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present application.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

An embodiment of the present invention provides a heat dissipation device for a pitch control system, as shown in fig. 1, the heat dissipation device includes:

the cabinet body 100 is internally provided with a variable pitch driver 200, and the bottom of the cabinet body is provided with a heat radiation hole 300;

the heat conducting plate 400 is arranged in the cabinet body 100 and is matched with the inner side of the cabinet body 100 to form a heat dissipation cavity 500, and the heat dissipation cavity 500 is used for conducting heat generated by the variable-pitch driver 200 into the heat dissipation cavity 500;

the heat dissipation fan 600 is installed in the heat dissipation cavity 500, electrically connected to the pitch drive 200, and configured to blow heat in the heat dissipation cavity 500 out of the heat dissipation hole 300 after being started;

the temperature sensor 700 is electrically connected with the variable pitch driver 200 and used for detecting the driver temperature of the variable pitch driver 200;

the variable pitch driver 200 is configured to control the heat dissipation fan 600 according to the temperature of the driver.

In this embodiment, the pitch driver 200 may obtain the driver temperature collected by the temperature sensor 700, and control the cooling fan 600 according to the driver temperature.

In a specific application scenario of the present application, as shown in fig. 2, a pitch drive in a left view D is a core device of a pitch control system and is also one of main heat sources of the pitch control system, a view B is positions of four axial fans seen from a direction indicated by an arrow in a cabinet, wherein the four axial fans are axial fans 1, 2, 3, and 4 in sequence, and a bottom (hot air) outlet, i.e., a heat dissipation hole, of the cabinet body can be seen from a bottom view E.

In the prior art, the heat dissipation of a high-power device in a variable pitch control system is mainly achieved through cold plate heat dissipation, the traditional scheme is that the heating device is installed on a cabinet wall, then a heat dissipation plate is placed at an outside-cabinet mirror image position of the device relative to the cabinet wall, and heat dissipation is achieved through the heat dissipation plate placed outside the cabinet. The second traditional scheme is to make a special heat dissipation air duct for the device needing heat dissipation, which is applicable but increases the cost of making the heat dissipation air duct.

In the embodiment, the heat dissipation cavity and the cabinet body are designed into a whole, a heat dissipation air channel does not need to be additionally designed, heat dissipation is performed by using the mounting structure of the cabinet body, and the mounting structure is not only suitable for but also meets the mounting mode of a driver of a variable pitch control system in the cabinet.

In order to improve the life of the heat dissipation fan, in some embodiments of the present application, the number of the heat dissipation fan is multiple, and the pitch driver is specifically configured to:

determining the starting number of the heat dissipation fans according to the temperature of the driver;

and controlling the cooling fan according to the starting number and a preset starting sequence.

In this embodiment, the number of the heat dissipation fans may be multiple, and each heat dissipation fan is disposed at a different position, and after the driver temperature is obtained, since different driver temperatures may correspond to different heat dissipation speeds, if the driver temperature is higher, the number of the heat dissipation fans is increased, and the heat dissipation speed is increased. The starting number of the heat radiation fans is determined according to the temperature of the driver, and not all the heat radiation fans are always started, and then the heat radiation fans are controlled according to the starting number and the preset starting sequence, so that the reliability of the heat radiation fans can be improved on the basis of ensuring the heat radiation effect.

Optionally, a corresponding relationship between the driver temperature and the starting number may be established in advance, and the starting number may be determined by querying the corresponding relationship according to the driver temperature.

It should be noted that the above solution of the preferred embodiment is only one specific implementation solution proposed in the present application, and other ways of controlling the heat dissipation fan according to the temperature of the driver are all within the protection scope of the present application.

In order to improve the life of the heat dissipation fan, in some embodiments of the present application, the heat dissipation fan includes a first fan assembly and a second fan assembly arranged in a single row, and the pitch drive is further specifically configured to:

if the temperature of the driver is higher than a first set temperature and not higher than a second set temperature, starting the fans in the first fan combination and keeping the preset time length;

and acquiring a new driver temperature, and if the new driver temperature is higher than the first set temperature and not higher than the second set temperature, stopping the fans in the first fan combination and starting the fans in the second fan combination.

In this embodiment, the heat dissipation fan includes a first fan assembly and a second fan assembly arranged in a single row, if the temperature of the driver is higher than a first set temperature and not higher than a second set temperature, it is indicated that the temperature of the driver is not too high at this time, only a part of the heat dissipation fans needs to be started, the fans in the first fan assembly are started first according to a preset starting sequence and kept for a preset time, then a new driver temperature is obtained, if the new driver temperature is still higher than the first set temperature and not higher than the second set temperature, it is indicated that the temperature of the driver is not too high at this time but heat dissipation still needs to be continued, in order to improve the life of the first fan assembly, the fans in the first fan assembly are stopped and the fans in the second fan assembly are started.

In this embodiment, if the temperature of the new driver is not higher than the first set temperature, it is indicated that heat dissipation is not required to be continued, and the first fan assembly is stopped; if the new driver temperature obtained again is still higher than the first set temperature and not higher than the second set temperature after the second fan assembly operates for the preset time, and in order to prolong the service life of the second fan assembly, the fans in the second fan assembly are stopped and the fans in the first fan assembly are started.

In this embodiment, a person skilled in the art may divide the first fan assembly and the second fan assembly according to actual needs, where the first fan assembly may include a plurality of cooling fans, the second fan assembly may include a plurality of cooling fans, and the number of the cooling fans in the first fan assembly is equal to or different from that of the second fan assembly.

In order to improve the heat dissipation efficiency, in some embodiments of the present application, the pitch drive is further specifically configured to:

and if the temperature of the driver is higher than the second set temperature, starting the fan in the first fan combination and the fan in the second fan combination.

In this embodiment, if the temperature of the driver is higher than the second set temperature, it is indicated that the temperature of the driver is too high, heat dissipation needs to be performed quickly, and the fan in the first fan assembly and the fan in the second fan assembly are started simultaneously.

To improve heat dissipation efficiency, in some embodiments of the present application, an average distance of the fans in the first fan combination to a maximum temperature point is less than an average distance of the fans in the second fan combination to the maximum temperature point, the maximum temperature point being a maximum temperature point on the surface of the pitch drive when both the first fan combination and the first fan combination are stopped.

In this embodiment, the maximum temperature point exists on the surface of the variable pitch drive, and preselection can be performed according to experiments, and it is determined that the heat dissipation effect of the first fan combination is better because the average distance from the fan in the first fan combination to the maximum temperature point is smaller than the average distance from the fan in the second fan combination to the maximum temperature point, and when the temperature of the drive is higher than the first set temperature and is not higher than the second set temperature, the fan in the first fan combination is started first, so that the heat dissipation efficiency can be improved.

In order to improve the heat dissipation efficiency, in the preferred embodiment of the present application, the first fan assembly and the second fan assembly each include two fans.

The person skilled in the art can flexibly arrange the first fan combination and the second fan combination without affecting the scope of protection of the present application.

In order to improve the heat dissipation efficiency, in the preferred embodiment of the present application, the heat conducting plate is in surface contact with the outer surface of the pitch drive.

As described above, since the heat conducting plate is in surface contact with the outer surface of the pitch driver, the heat dissipation efficiency is improved, and optionally, a preset gap can be maintained between the heat conducting plate and the outer surface of the pitch driver, where the preset gap is smaller than a preset threshold value.

In order to improve the heat dissipation efficiency, in a preferred embodiment of the present application, the heat conducting plate is made of aluminum, and the heat dissipation fan is an axial flow fan.

Those skilled in the art can also select heat conducting plates of other materials and other types of heat dissipating fans flexibly without affecting the scope of the present application.

Through applying above technical scheme, become oar controlling system's heat abstractor includes: the variable-pitch drive is arranged in the cabinet body, and heat dissipation holes are formed in the bottom of the cabinet body; the heat conducting plate is arranged in the cabinet body and matched with the inner side of the cabinet body to form a heat dissipation cavity for conducting heat generated by the variable-pitch driver into the heat dissipation cavity; the cooling fan is arranged in the cooling cavity, is electrically connected with the variable-pitch driver and is used for blowing heat in the cooling cavity out of the cooling hole after being started; the temperature sensor is electrically connected with the variable pitch driver and used for detecting the temperature of the driver of the variable pitch driver; the variable-pitch driver is used for controlling the cooling fan according to the temperature of the driver, so that the cooling efficiency of the variable-pitch control system is improved, the variable-pitch driver can adjust the cooling capacity of the cooling device in real time according to the actual working condition and the current heating value, and the long service life of the cooling fan is favorably maintained while the requirement of high-power cooling is met.

In order to further illustrate the technical idea of the present invention, the technical solution of the present invention will now be described with reference to specific application scenarios.

The embodiment of the invention provides a heat dissipation method of a variable pitch control system, which is applied to the heat dissipation device, as shown in fig. 3, a variable pitch driver controls the starting number and sequence of axial fans by controlling relays 8K5 and 8K6, the installation position and the starting sequence of the axial fans can be specifically designed according to the main heating position and the heating amount of the variable pitch driver, and the method is suitable for a high-power variable pitch control system driver heat dissipation scheme.

As shown in fig. 4, the start of the axial flow fan is judged according to the temperature range of the pitch drive in the cabinet received by the pitch drive, if the temperature of the drive is greater than T1 and not greater than T2, only the axial flow fans 2 and 3 need to be started, after the time T of operating the axial flow fans 2 and 3, the temperature of the drive is still greater than T1 and not greater than T2, the axial flow fans 1 and 4 are switched to continue to operate, and if the temperature of the drive is greater than T2, the four axial flow fans are simultaneously started.

The variable pitch driver can adjust the heat dissipation capacity of the heat dissipation device in real time according to the actual working condition and the current heat productivity, and the service life of the fan is kept.

The heat dissipation device is not limited to the mounting position of the variable pitch driver, and can be simultaneously suitable for the situation that the variable pitch driver is independently mounted in one control cavity and is also suitable for the situation that the variable pitch driver and other devices are mounted in one control cavity. In addition, the size in the cabinet body and the number of heating sources influence the temperature rise of the system, the installation position of the cooling fan can be adjusted according to actual conditions, and the type and the number of the cooling fan can be selected. In addition, the whole system can be distributed with heat sources, and the heat dissipation performance of the whole system is better in a mode of reasonably selecting the positions of the temperature sensors.

Corresponding to the heat dissipation device of the pitch control system in the embodiment of the present application, an embodiment of the present invention further provides a heat dissipation control method of the pitch control system, where the method is applied to the heat dissipation device described above, and as shown in fig. 5, the method includes:

step S501, the variable pitch driver controls the cooling fan according to the temperature of the driver.

In order to prolong the life of the heat dissipation fan, in some embodiments of the present application, the number of the heat dissipation fans is multiple, and the pitch driver controls the heat dissipation fans according to the temperature of the driver, specifically:

the variable-pitch driver determines the starting number of the heat dissipation fans according to the temperature of the driver;

and controlling the cooling fan according to the starting number and a preset starting sequence.

In order to prolong the life of the heat dissipation fan, in some embodiments of the present application, the heat dissipation fan includes a first fan assembly and a second fan assembly arranged in a single row, the starting number of the heat dissipation fan is determined according to the temperature of the driver, and the heat dissipation fan is controlled according to the starting number and a preset starting sequence, specifically:

if the temperature of the driver is higher than a first set temperature and not higher than a second set temperature, starting the fans in the first fan combination and keeping the preset time length;

and acquiring a new driver temperature, and if the new driver temperature is higher than the first set temperature and not higher than the second set temperature, stopping the fans in the first fan combination and starting the fans in the second fan combination.

In order to improve the heat dissipation efficiency, in some embodiments of the present application, the method further includes:

and if the temperature of the driver is higher than the second set temperature, starting the fan in the first fan combination and the fan in the second fan combination.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not necessarily depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.