阅读说明：本技术 一种温度风压可调的热鼓风风电机组叶片除冰系统 (Temperature and wind pressure adjustable hot blast wind turbine generator blade deicing system ) 是由 毛涵韬 刘钦东 罗勇水 许志 艾真伟 于 2020-06-12 设计创作，主要内容包括：本发明公开了一种温度风压可调的热鼓风风电机组叶片除冰系统,包括设置在叶片内的加热装置和与加热装置连接的控制柜,加热装置包括鼓风机和连接在鼓风机出口端的加热器,叶片内设有调节装置,所述调节装置包括设于叶尖部位的储热腔和设置在储热腔上的调节阀,所述加热装置设置在叶根并通过通风管连通至储热腔内,所述控制柜通过控制调节阀调节储热腔内的温度和气压。本发明具有如下有益效果：提高热量利用率,除冰效果好；实现储热腔内的温度控制调节；设置V形密封条提升密封性能保证保温性能；解决不同运行环境温度下、不同气候条件下对加热系统的差异化需求；通用性强；结构简单,成本低,安装方便。(The invention discloses a temperature and wind pressure adjustable hot blast wind turbine blade deicing system which comprises a heating device arranged in a blade and a control cabinet connected with the heating device, wherein the heating device comprises an air blower and a heater connected to the outlet end of the air blower, an adjusting device is arranged in the blade and comprises a heat storage cavity arranged at a blade tip part and an adjusting valve arranged on the heat storage cavity, the heating device is arranged at a blade root and is communicated into the heat storage cavity through a ventilation pipe, and the control cabinet adjusts the temperature and the air pressure in the heat storage cavity through a control adjusting valve. The invention has the following beneficial effects: the heat utilization rate is improved, and the deicing effect is good; the temperature control and regulation in the heat storage cavity are realized; the V-shaped sealing strips are arranged to improve the sealing performance and ensure the heat insulation performance; the differentiation requirements of the heating system under different operating environment temperatures and different climatic conditions are met; the universality is strong; simple structure, low cost and convenient installation.)

1. The utility model provides a temperature wind pressure adjustable hot blast wind turbine generator system blade deicing system, including setting up heating device in blade (1) and switch board (7) be connected with heating device, heating device includes air-blower (2) and connects heater (3) at air-blower (2) exit end, characterized by is equipped with adjusting device in blade (1), adjusting device is including locating the heat storage chamber at apex position and setting up the governing valve on the heat storage chamber, heating device sets up at the blade root and communicates to the heat storage intracavity through ventilation pipe (5), switch board (7) are through controlling temperature and atmospheric pressure that the governing valve adjusted the heat storage intracavity.

2. The deicing system of the blade of the hot blast wind turbine generator with adjustable temperature and wind pressure as claimed in claim 1, wherein a leading edge web (12) is arranged in the blade (1) close to the leading edge along the length direction of the blade, a leading edge cavity (11) is formed between the leading edge web (12) and the leading edge wall of the blade (1), a trailing edge web (14) is arranged in the blade (1) close to the trailing edge along the length direction of the blade, a return air cavity (13) is formed between the leading edge web (12) and the trailing edge web (14), the leading edge cavity (11) and the return air cavity (13) are communicated at the blade tip, and the heat storage cavity is arranged at one end of the leading edge cavity (11) and the return air cavity (13) close to the blade tip.

3. The deicing system of blades of a hot blast wind turbine generator with adjustable temperature and wind pressure as claimed in claim 2, wherein a front edge cavity wind shield (111) is arranged in the front edge cavity (11), the front edge cavity wind shield (111) is arranged at a position 1/4-1/2, close to a blade root, of the blade (1), a wind shield (15) is arranged in the return air cavity (13), a heat storage cavity is formed between the front edge cavity wind shield (111) and the wind shield (15), and the regulating valve comprises a wind hole (151) and a regulating mechanism (6) which are arranged on the wind shield (15).

4. The deicing system according to claim 3, characterized in that the wind adjusting mechanism (6) comprises a wind hole adjusting plate (61) and a hydraulic cylinder (62), the wind hole adjusting plate (61) is slidably connected with the wind deflector (15), a piston rod of the hydraulic cylinder (62) is connected with the wind hole adjusting plate (61), and the control cabinet (7) controls the reciprocation of the piston rod of the hydraulic cylinder (62).

5. The deicing system for the blades of the hot blast wind turbine generator with adjustable temperature and wind pressure as claimed in claim 4, wherein a sealing strip (17) is arranged around the wind hole (151), the cross section of the sealing strip (17) is V-shaped, two ends of the V-shape are arranged on one side close to the wind hole adjusting plate (61), and two ends of the V-shape are both arc-shaped and are flared outwards.

6. The deicing system of blades of a hot blast wind turbine generator with adjustable temperature and wind pressure as claimed in claim 3, wherein the wind adjusting mechanism (6) comprises a motor (63) and a wind hole adjusting plate (61) arranged in a wind hole (151), a rotating shaft is arranged in the wind hole (151), the wind hole adjusting plate (61) is rotatably connected with the wind hole (151) through the rotating shaft, and the motor (63) drives the wind hole adjusting plate (61) to rotate.

7. The system for deicing blades of a hot blast wind turbine generator according to claim 3, wherein the wind adjusting mechanism (6) comprises a motor (63) and a plurality of linked wind hole adjusting units arranged in wind holes (151), each wind hole adjusting unit comprises a wind hole adjusting plate (61) and a rotating shaft, the wind hole adjusting plates (61) are rotatably connected with the wind holes (151) through the rotating shafts, and the motor (63) drives one wind hole adjusting plate (61) to rotate.

8. The system for deicing blades of a hot blast wind turbine generator with adjustable temperature and wind pressure as claimed in any one of claims 1 to 7, wherein a temperature sensor and a sensor assembly are arranged outside the blades (1) in series, the sensor assembly comprises a humidity sensor, an icing detector and a high wind low power module which are connected in parallel, and the sensor assembly is connected with the control cabinet (7).

9. The deicing system according to any one of claims 1 to 7, characterized in that a web sensor assembly (16) is disposed in the heat storage chamber, the web sensor assembly (16) comprises a web temperature sensor and a web pressure sensor connected in parallel, and the web sensor assembly (16) is connected to the control cabinet (7).

10. The system for deicing blades of a hot blast wind turbine generator according to any one of claims 1 to 7, wherein temperature sensors are arranged at the inlet of the blower (2) and in the ventilation pipe (5).

Technical Field

The invention relates to the technical field of deicing of blades of wind generating sets, in particular to a deicing system for blades of a hot blast wind generating set with adjustable temperature and wind pressure.

Background

The blade of the wind turbine generator is frozen, which is one of the common problems of the running of the fan, particularly in the areas with high outdoor humidity, the blade is easy to freeze in winter. Blade icing can cause very important influence to blade itself, if not in time detect blade icing when the blade is icing, make the fan continue to rotate, blade load is too big causes the rupture. Meanwhile, if the time for melting ice is too long, unsafe factors are increased, for example, the falling ice blocks can break the box and become, and even possibly injure others by mistake, which highlights the necessity of accelerating the deicing of the blades, removes the residual ice as soon as possible, improves the benefits of enterprises, and also removes potential safety hazards. For large-size and large-prebending blades, deicing of the blade tip part is particularly important, even if the blade tip part is slightly frozen, huge torque can be generated to influence the load of the blade, and meanwhile, the heat is difficult to be quickly transferred to the blade tip part due to the fact that the length of the blade is too long. Existing wind turbine generator system blades typically heat the blade by heating the air at the blade root and delivering the heated air to the blade cavity. The technology has the problems that heat cannot quickly reach the blade tip part and the heat is quickly lost and the like particularly in large-size and large-prebending blades, so that the deicing effect is poor and energy waste is serious.

For example, a heating deicing system for a blade and a method thereof, a blade and a wind generating set disclosed in chinese patent document, and publication No. CN107905961B, the heating deicing system for a blade includes an isolation device disposed in a blade cavity, and divides a part of the cavity in the blade cavity near a leading edge of the blade into a plurality of sub-cavities sequentially distributed along a length direction of the blade, and each sub-cavity is provided with a heating device. The heating deicing system of the blade comprises a controller, wherein the controller is used for responding to a blade deicing instruction and respectively controlling the opening and closing of each heating device in a plurality of sets of heating devices in each sub-cavity so as to heat a plurality of sub-cavities. The blade deicing device has the disadvantages that the blade is divided into a plurality of cavities, each cavity is internally provided with the heating device, the space of the blade tip part is small, various devices are difficult to install, the deicing effect of the blade tip is influenced, the structure is complex, a large number of electrical accessories are used, the cost is high, the weight of the blade is increased due to the excessive heating devices, the load of the blade is increased, and the energy consumption is increased.

Disclosure of Invention

The invention aims to solve the problems of poor deicing effect, low heat utilization rate, high cost and high deicing difficulty of blade tip parts in the prior art, provides the deicing system for the blades of the hot blast wind turbine generator with adjustable temperature and wind pressure, has a simple structure, improves the heating efficiency of blade cavities, particularly blade tips, improves the heat utilization rate and achieves a good deicing effect.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a temperature wind pressure adjustable hot blast wind turbine generator system blade deicing system, includes the switch board that sets up heating device in the blade and be connected with heating device, and heating device includes the air-blower and connects the heater at the air-blower exit end, is equipped with adjusting device in the blade, adjusting device is including locating the heat storage chamber at apex position and setting up the governing valve on the heat-retaining chamber, heating device sets up at the blade root and communicates to the heat-retaining intracavity through the ventilation pipe, the switch board is through temperature and the atmospheric pressure that control regulating valve adjusted the heat-retaining intracavity.

The invention is characterized in that the regulating device is arranged in the blade tip of the blade, hot air generated by the heating device is directly introduced into the heat storage cavity through the vent pipe, the regulating valve reduces the opening even in a closed state under a low-temperature or low-pressure state, the hot air is retained in the heat storage cavity, heat is difficult to lose, the temperature of the blade tip is quickly raised, a higher-temperature state can be maintained for a long time, a good deicing effect is achieved, and the heat utilization rate is high; meanwhile, the regulating valve is arranged to regulate the air outlet quantity of the heat storage cavity, the regulating valve is opened when the temperature or the pressure in the heat storage cavity is too high, the air outlet quantity is increased, the influence of high temperature on the performance of the blade is avoided, and the regulating valve is closed when the temperature or the pressure in the heat storage cavity is too low, so that the temperature in the heat storage cavity is rapidly increased; the control cabinet is arranged at the position of the blade root, so that the influence on the load of the blade is reduced, and the control cabinet controls the opening and closing of the heating device and the regulating valve at the same time.

Preferably, a front edge web is arranged in the blade close to the front edge along the length direction of the blade, a front edge cavity is formed between the front edge web and the front edge wall of the blade, a rear edge web is arranged in the blade close to the rear edge along the length direction of the blade, a return air cavity is formed between the front edge web and the rear edge web, the front edge cavity is communicated with the return air cavity at the blade tip, and the heat storage cavity is arranged at one end of the front edge cavity and one end of the return air cavity close to the blade tip.

Because the width of the front edge of the blade is larger than that of the rear edge, the front edge cavity has enough space for installing a heating device, hot air flows out of the ventilation pipe and firstly passes through the blade tip part of the front edge cavity to heat the front edge side of the blade tip and then turns back to enter the air return cavity to heat the rest part of the blade tip, the heat storage cavity is concentrated on the blade tip part, the hot air is concentrated on the blade tip part, the rapid deicing of the blade tip is ensured, the redundant hot air leaves the heat storage cavity to enter the part of the air return cavity close to the blade root and then is sucked into the air blower again, and air circulation is formed.

Preferably, a front edge cavity wind shield is arranged in the front edge cavity, the front edge cavity wind shield is arranged at 1/4-1/2 positions of the blade close to the blade root, a wind shield is arranged in the return air cavity, a heat storage cavity is formed between the front edge cavity wind shield and the wind shield, and the adjusting valve comprises a wind hole and an adjusting mechanism which are arranged on the wind shield.

The front edge wind shield is used for sealing the front end of the heat storage cavity and preventing hot air from flowing back from the heat storage cavity to the blade root, and the blade root 1/4-1/2 is spacious, so that the front edge wind shield is convenient to mount; the wind shields are used for sealing the rear ends of the heat storage cavities, and the heat storage cavities are formed between the two wind shields.

Preferably, the air adjusting mechanism comprises an air hole adjusting plate and a hydraulic cylinder, the air hole adjusting plate is connected with the wind shield in a sliding mode, a piston rod of the hydraulic cylinder is connected with the air hole adjusting plate in a sliding mode, and the control cabinet controls the piston rod of the hydraulic cylinder to reciprocate.

The first implementation mode is that the hydraulic cylinder drives the air hole adjusting plate to slide on the wind shield so as to change the opening degree of the air hole, when the temperature in the heat storage cavity is too high or the pressure is too high, the control cabinet controls the hydraulic cylinder to drive the air hole adjusting plate to increase the opening degree of the air hole, and hot air leaves the heat storage cavity through the air hole to reduce the temperature and the air pressure in the heat storage cavity; when the temperature in the heat storage cavity is too low or the pressure is too low, the control cabinet controls the hydraulic cylinder to drive the air hole adjusting plate to reduce the opening degree of the air holes, the amount of hot air passing through the air holes is reduced, the heat storage cavity plays a heat preservation role, the driving force of the hydraulic cylinder is large, and the response speed is high.

Preferably, a sealing strip is arranged around the wind hole, the cross section of the sealing strip is V-shaped, two ends of the V-shaped are arranged on one side close to the wind hole adjusting plate, and two ends of the V-shaped are both arc-shaped and are outwards unfolded.

Sealing performance in wind hole department has influenced the thermal insulation performance in heat-retaining chamber, in the first embodiment, because wind hole regulating plate need make a round trip to slide on the baffle, easily cause the deformation of sealing strip, conventional sealing strip is difficult to guarantee sealedly, make wind hole regulating plate no matter to which direction motion through setting up V font sealing strip, sealing strip V font all has one end and wind hole regulating plate contact, the contact surface of curved tip increase sealing strip and wind hole regulating plate, increase sealing performance.

As preferred, the wind mechanism of transferring includes the motor and sets up the wind hole regulating plate in the wind hole, the downthehole pivot that is equipped with of wind, the wind hole regulating plate rotates through the pivot with the wind hole to be connected, motor drive wind hole regulating plate rotates.

The second implementation mode is that the motor drives the air hole adjusting plate to rotate in the air hole so as to change the opening degree of the air hole, when the temperature in the heat storage cavity is too high or the pressure in the heat storage cavity is too high, the control cabinet controls the motor to drive the air hole adjusting plate to increase the opening degree of the air hole, and hot air leaves the heat storage cavity through the air hole to reduce the temperature and the air pressure in the heat storage cavity; when the temperature in the heat storage cavity is too low or the pressure is too low, the control cabinet controls the motor to drive the air hole adjusting plate to reduce the opening degree of the air holes, hot air passes through the air hole to be reduced, the heat storage cavity plays a heat preservation role, the motor can be connected with the rotating shaft through the reduction gear, and the rotating angle sensor can be arranged on the rotating shaft to control the rotating angle of the rotating shaft. The motor has high response speed and is easy to control.

As preferred, the wind adjusting mechanism includes the motor and sets up the wind hole regulating unit in the wind hole a plurality of linkages, wind hole regulating unit includes wind hole regulating plate and pivot, wind hole regulating plate rotates through the pivot with the wind hole and is connected, a wind hole regulating plate of motor drive rotates.

The third embodiment is that a motor drives a single air hole adjusting plate to rotate and drives all the air hole adjusting units to rotate so as to change the opening degree of the air holes, the air quantity passing through the structure is uniform, each air hole adjusting plate is subjected to smaller air pressure, and the required driving force is smaller.

Preferably, a temperature sensor and a sensor assembly which are connected in series are arranged outside the blades, the sensor assembly comprises a humidity sensor, an icing detector and a high-wind low-power module which are connected in parallel, and the sensor assembly is connected with the control cabinet.

Only the temperature sensor outside the blade detects that the ambient temperature is too low, the humidity sensor detects that the humidity is too high, or the icing sensor detects external icing or the high-wind low-power module judges that the three conditions of the unit in the high-wind low-power state at least meet one condition, and the unit judges that the unit in the icing state starts the heating device to heat and deice.

Preferably, a web sensor assembly is arranged in the heat storage cavity and comprises a web temperature sensor and a web pressure sensor which are connected in parallel, and the web sensor assembly is connected with the control cabinet.

When the web sensor assembly detects that the temperature and the pressure of the inner cavity of the web exceed set values, the control cabinet can control the air adjusting mechanism to perform corresponding actions, and the position where the temperature and the pressure in the heat storage cavity are highest is close to the position of the air hole, so that the web sensor assembly is installed in the heat storage cavity and close to the position of the air hole, and the influence on the performance of the blade due to the overhigh temperature or pressure in the heat storage cavity is prevented.

Preferably, temperature sensors are arranged at the inlet of the blower and in the ventilation pipe.

When the temperature of the two parts is too high, the heating device stops heating, and the blade is prevented from being too high in temperature.

Therefore, the invention has the following beneficial effects: (1) the heat storage cavity is arranged on the blade tip to ensure that the blade tip has enough temperature for deicing, so that energy loss is reduced, the heat utilization rate is improved, and the deicing effect is good; (2) the ventilation quantity is adjusted according to the temperature or the pressure in the heat storage cavity by arranging the air adjusting mechanism, so that the temperature in the heat storage cavity is controlled and adjusted; (3) hydraulic control or electric control meets different requirements; (4) the V-shaped sealing strips are arranged to improve the sealing performance and ensure the heat insulation performance; (5) the differentiation requirements of the heating system under different operating environment temperatures and different climatic conditions are met; (6) the deicing device can be applied to small-size and small-pre-bent blades, and simultaneously meets the high requirement of large-size and large-pre-bent blades on blade tip deicing, and has strong universality; (7) simple structure, low cost and convenient installation.

Drawings

FIG. 1 is a schematic diagram of an embodiment of the present invention.

Fig. 2 is a schematic structural view of the wind adjustment mechanism in embodiment 1 of the present invention.

FIG. 3 is a schematic structural view of a weather strip according to embodiment 1 of the present invention.

Fig. 4 is a schematic structural view of an air adjusting mechanism in embodiment 2 of the present invention.

Fig. 5 is a schematic structural diagram of an air adjusting mechanism in embodiment 3 of the present invention.

In the figure: 1. the wind power generation device comprises blades, 11, a front edge cavity, 111, a front edge wind shield, 12, a front edge web, 13, a return air cavity, 14, a rear edge web, 15, a wind shield, 151, a wind hole, 152, a slot, 16, a web sensor assembly, 17, a sealing strip, 2, a blower, 21, a first temperature sensor, 3, a heater, 4, a second temperature sensor, 5, a ventilation pipe, 6, a wind adjusting mechanism, 61, a wind hole adjusting plate, 62, a hydraulic cylinder, 63, a motor, 64, a connecting rod, 7 and a control cabinet.

Detailed Description

The invention is further described with reference to the following detailed description and accompanying drawings.