CN117445259A - Heating and cooling system and method for main mold of wind power blade - Google Patents

Abstract

The invention discloses a heating and cooling system and a method for a main die of a wind power blade, wherein the system comprises an SS (support structure) face die and a PS (polystyrene) face die, and also comprises an electric heating system and a water heating system, wherein the electric heating system comprises a heating wire and a power supply device, the heating wire is arranged in the PS face die, and the positive electrode and the negative electrode of the heating wire are respectively electrically connected with the positive electrode and the negative electrode of the power supply device; the water heating system comprises a heater, a cooling tower and a water pipe, wherein the water pipe is arranged in the SS surface mould, two ends of the water pipe are respectively communicated with the heater through a first valve, and two ends of the water pipe are respectively communicated with the cooling tower through a second valve; by adopting the structure, the PS surface die adopts the electric heating system, so that the weight of the heating system can be effectively reduced, the overturning load of the die is reduced, the SS surface die adopts the water heating system, and the cooling water can be utilized to realize the rapid cooling of the wind power blade product.

Description

Heating and cooling system and method for main mold of wind power blade

Technical Field

The invention relates to the technical field of wind power blade manufacturing, in particular to a heating and cooling system and method for a main die of a wind power blade

Background

Wind power blades are generally composite materials, and the glass transition temperature (Tg value) of the materials used is generally equal to or higher than 70 ℃. The wind power blade production process needs to be heated and solidified, demoulding is needed after solidification, and the temperature needs to be reduced to below 50 ℃ during demoulding so as to ensure the strength of the blade. The weight of the current large-sized blade is more than 20t, and the length is more than 80 m. The blades are long and have large heat capacity. The existing die has the problems of slow cooling, single water heating partition and the like.

Patent publication No. CN110901105A discloses a RTM mold structure capable of being heated or cooled rapidly and a using method thereof, wherein the rapid heating and cooling of the RTM mold are realized by designing an oil heating mold into a mold body and a heating/cooling module, however, the mold structure needs to be provided with the heating module and the cooling module, the whole heating system has heavy weight, the overturning load of the mold is increased, and the mold structure is not suitable for a large-scale wind power blade mold.

The publication CN201357532Y discloses an electric heating and air cooling system for a mold, which constructs the mold in a sandwich structure, and when the mold needs to be heated, an electric current is applied to an electric heating device to heat the mold; when the mold needs to be cooled, cold air from a cold air supply device may be supplied into the core through some of the through holes, flow through the cold air in the pleat channels or air flow holes, and exit the core through other through holes, thereby taking away the heat of the mold. In this kind of structure, cooling efficiency is slower relatively through air cooling system, is unfavorable for wind-powered electricity generation blade's rapid cooling.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a heating and cooling system of a main mould of a wind power blade, which can realize rapid cooling of the wind power blade.

Further, the application also provides a heating and cooling method for the main mould of the wind power blade.

The technical scheme adopted by the invention is as follows:

the heating and cooling system comprises an SS surface die, a PS surface die, an electric heating system and a water heating system, wherein the electric heating system comprises heating wires and a power supply device, the heating wires are arranged in the PS surface die, and the positive electrode and the negative electrode of the heating wires are respectively and electrically connected with the positive electrode and the negative electrode of the power supply device; the water heating system comprises a heater, a cooling tower and a water pipe, wherein the water pipe is arranged in the SS surface mold, two ends of the water pipe are respectively communicated with the heater through a first valve, and two ends of the water pipe are respectively communicated with the cooling tower through a second valve.

Further, the water heating system also comprises a temperature control system which is respectively connected with the electric heating system and the water heating system.

Further, one end of the water pipe is connected with the water outlets of the heater and the cooling tower respectively through a first three-way joint, and the other end of the water pipe is connected with the water return ports of the heater and the cooling tower respectively through a second three-way joint.

Further, the number of the first valves is two, and the two first valves are respectively arranged on pipelines between the heater and the first three-way joint and between the heater and the second three-way joint.

Further, the number of the second valves is two, and the two second valves are respectively arranged on pipelines between the cooling tower and the first three-way joint and between the cooling tower and the second three-way joint.

Further, the water pipe is arranged in the SS surface mold in an S shape.

Further, the water pipe is a copper pipe.

Further, the heating wire is arranged in the PS surface die in an S shape.

Further, temperature sensors are also installed in the SS surface die and the PS surface die, and the temperature sensors are connected with the temperature control system.

Further, the application also provides a heating and cooling method for the main mould of the wind power blade, which comprises the following steps:

when the wind power blade is solidified, the PS surface mould is controlled to be heated through the electric heating system, and meanwhile, the first valve is controlled to be opened, the second valve is controlled to be closed, so that the SS surface mould is controlled to be heated through the heater of the water heating system;

after the wind power blade is solidified, the PS mold is opened, so that the PS surface of the wind power blade is exposed in the air to dissipate heat of the PS surface of the wind power blade through air flow; and meanwhile, the first valve is controlled to be closed, and the second valve is controlled to be opened so as to control the cooling of the SS surface mould through a cooling tower of the water heating system, so that the SS surface of the wind power blade is cooled through a skin in the SS surface mould.

Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. Like elements or portions are generally identified by like reference numerals throughout the several figures. In the drawings, elements or portions thereof are not necessarily drawn to scale.

Fig. 1 is a schematic diagram of an arrangement structure of a heating wire and a copper pipe provided in embodiment 1 of the present application;

fig. 2 is a schematic diagram of a PS-plane die partition structure provided in embodiment 1 of the present application;

fig. 3 is a schematic diagram of an SS surface module partition structure provided in embodiment 1 of the present application.

Wherein, PS face mould 1, SS face mould 2, heater strip 3, water pipe 4.

Detailed Description

Embodiments of the technical scheme of the present invention will be described in detail below with reference to specific embodiments. The following examples are only for more clearly illustrating the technical aspects of the present invention, and thus are merely examples, and are not intended to limit the scope of the present invention.

It is noted that unless otherwise indicated, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains.

Example 1

Referring to fig. 1 to 3, the embodiment provides a heating and cooling system for a main mold of a wind power blade, which comprises an SS surface mold 21 and a PS surface mold 21, and further comprises an electric heating system and a water heating system, wherein the electric heating system comprises a heating wire 3 and a power supply device, the heating wire 3 is arranged in the PS surface mold 21, and the anode and the cathode of the heating wire are respectively electrically connected with the anode and the cathode of the power supply device; the water heating system comprises a heater, a cooling tower and a water pipe 4, wherein the water pipe 4 is arranged in the SS surface mould 21, two ends of the water pipe 4 are respectively communicated with the heater through a first valve, and two ends of the water pipe 4 are respectively communicated with the cooling tower through a second valve.

The method starts from the design of the mold, and utilizes the difference of the PS-side mold 21 and the SS-side mold 21 in the process of manufacturing the wind power blade, an electric heating system is respectively designed for the PS-side mold 21, a water heating system is designed for the SS-side mold 21, and in the curing stage of the wind power blade, the PS-side mold 21 and the SS-side mold 21 can be respectively heated through the electric heating system and the water heating system; after the solidification of the wind power blade is completed, the PS surface mold 21 can be opened, so that the PS surface of the wind power blade is exposed in the air, the rapid heat dissipation is realized by utilizing the flow of the air, and the SS surface of the wind power blade still in the SS surface mold 21 can be rapidly cooled by utilizing a cooling tower of a water heating system.

By adopting the structure, the PS side die 21 of the wind power blade product cooling device adopts an electric heating system, so that the weight of the heating system can be effectively reduced, the overturning load of the die is reduced, the SS side die 21 adopts a water heating system, and the cooling water can be utilized to realize the rapid cooling of the wind power blade product.

The PS surface of the wind power blade is the windward surface of the wind power blade, and the SS surface of the wind power blade is the leeward surface of the wind power blade; the PS-side mold 21 is a mold for manufacturing the windward side of the wind turbine blade, and the SS-side mold 21 is a mold for manufacturing the leeward side of the wind turbine blade.

In order to better control the heating temperature and speed, the water heater also comprises a temperature control system which is respectively connected with the electric heating system and the water heating system, and controls the heating temperature and speed of the electric heating system and the water heating system and controls the cooling temperature and speed of the water heating system through the temperature control system.

The heating wire 3 is arranged in the PS surface die 21 in an S shape, the positive electrode and the negative electrode of the heating wire 3 are respectively connected with the positive electrode and the negative electrode of the power supply device, and the heating wire 3 generates heat after being electrified to heat the PS surface die 21. After the curing of the wind power blade is completed, the PS surface mold 21 can be opened, the PS surface of the wind power blade is exposed to the air, and the cooling is realized through the circulation of the air. The PS-side die 21 is set to be in an electric heating mode, so that the rapid cooling of the PS-side of the wind power blade after solidification is facilitated, and the weight of the die is reduced.

The water pipe 4 adopts copper pipes, is arranged in the SS surface mould 21 in an S shape, and can be used for liquid to pass through so as to heat or cool the SS surface mould 21. One end of the water pipe 4 is respectively connected with the water outlets of the heater and the cooling tower through a first three-way joint, and the other end of the water pipe 4 is respectively connected with the water return ports of the heater and the cooling tower through a second three-way joint.

Specifically, the number of the first valves is two, and the two first valves are respectively arranged on pipelines between the heater and the first three-way joint and between the heater and the second three-way joint. The two second valves are respectively arranged on pipelines between the cooling tower and the first three-way joint and between the cooling tower and the second three-way joint.

During the heating stage, a first valve between the heater and the first three-way joint and a first valve between the heater and the second three-way joint are opened, and the water heating system is switched to a heating mode, so that liquid can flow into the water pipe 4 from the heater, flow to the other end along the water pipe 4, return to the internal circulation of the heater, and heat the SS surface die 21.

And in the cooling stage, a first valve between the heater and the first three-way joint and a first valve between the heater and the second three-way joint are closed, a second valve between the cooling tower and the first three-way joint and a second valve between the cooling tower and the second three-way joint are opened, and the water heating system is switched to a cooling mode, so that cooling liquid flows into the water pipe 4 from the cooling tower and flows to the other end along the water pipe 4, returns to the cooling tower for internal circulation, cools the SS surface mold 21, and rapidly reduces the skin temperature when flowing through the SS surface mold 21 due to the fact that the skin of the SS surface of the wind power blade is tightly attached to the SS surface mold 21, thereby realizing rapid cooling of the SS surface of the wind power blade.

The heating liquid and the cooling liquid may be water or other liquids, and are not limited again.

In order to realize the requirement of partition heating, the corresponding PS-surface die 21 and SS-surface die 21 can be divided into a plurality of heating areas according to the structural characteristics of the wind power blade, the heating wires 3 in each heating area of the PS-surface die 21 are arranged in parallel, the heating wires 3 in each heating area are connected with a power supply device, the water pipes 4 in each heating area of the SS-surface die 21 are arranged in parallel, and the water pipes 4 in each heating area are connected with a heater and a cooling tower through corresponding valves.

Through the partition, each heating area can be heated or cooled in a partition mode according to actual conditions, and the temperature is controlled in the partition mode.

In order to monitor the heating and cooling temperatures, temperature sensors are also installed in the SS surface mold 21 and the PS surface mold 21, and are arranged in a plurality of areas at intervals, and each temperature sensor is connected with a temperature control system.

When the temperature is raised and lowered, the temperature condition in each heating area is monitored through a temperature sensor, and the temperature data of each heating area is sent to a temperature control system, and the temperature control system controls an electric heating system or a water heating system of a corresponding die to heat or cool the corresponding heating area according to preset conditions, so that the temperature raising and lowering rates and the temperature of the PS-side die 21 and the SS-side die 21 are basically kept consistent, and the expansion and contraction degree of the PS-side and the SS-side of the wind power blade are controlled to be consistent.

Example 2

The embodiment provides a heating and cooling method for a main mold of a wind power blade, which adopts the heating and cooling system for the main mold of the wind power blade provided in embodiment 1, and the heating method comprises the following steps:

when the wind power blade is solidified, the PS surface mould is controlled to be heated through the electric heating system, and meanwhile, the first valve is controlled to be opened, and the second valve is controlled to be closed so as to control the SS surface mould to be heated through the heater of the water heating system.

After the wind power blade is solidified, the PS mold is opened, so that the PS surface of the wind power blade is exposed in the air to dissipate heat of the PS surface of the wind power blade through air flow; and meanwhile, the first valve is controlled to be closed, and the second valve is controlled to be opened so as to control the cooling of the SS surface mould through a cooling tower of the water heating system, so that the SS surface of the wind power blade is cooled through a skin in the SS surface mould.

In the present application, unless explicitly specified and limited otherwise, the terms "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be an electrical connection; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the present invention, numerous specific details are set forth. However, it is understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, systems, and techniques have not been shown in detail in order not to obscure an understanding of this description.

In the description of the present specification, a description of the terms "one embodiment," "some embodiments," "examples," "particular examples," or "some examples," etc., means that a particular feature, system, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, systems, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention 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 scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention, and are intended to be included within the scope of the appended claims and description.

Claims (10)

1. The heating and cooling system of the wind power blade main die comprises an SS surface die and a PS surface die and is characterized by further comprising an electric heating system and a water heating system, wherein the electric heating system comprises heating wires and a power supply device, the heating wires are arranged in the PS surface die, and the positive electrode and the negative electrode of the heating wires are respectively and electrically connected with the positive electrode and the negative electrode of the power supply device; the water heating system comprises a heater, a cooling tower and a water pipe, wherein the water pipe is arranged in the SS surface mold, two ends of the water pipe are respectively communicated with the heater through a first valve, and two ends of the water pipe are respectively communicated with the cooling tower through a second valve.

2. The wind power blade main mold heating and cooling system according to claim 1, further comprising a temperature control system connected to the electric heating system and the water heating system, respectively.

3. The heating and cooling system of a wind power blade main mold according to claim 1, wherein one end of the water pipe is respectively connected with the water outlets of the heater and the cooling tower through a first three-way joint, and the other end of the water pipe is respectively connected with the water return ports of the heater and the cooling tower through a second three-way joint.

4. A wind turbine blade main mould heating and cooling system as claimed in claim 3, wherein the number of the first valves is two, and the two first valves are respectively arranged on the pipelines between the heater and the first three-way joint and between the heater and the second three-way joint.

5. A wind turbine blade main mould heating and cooling system as claimed in claim 3, wherein the number of the second valves is two, and the two second valves are respectively arranged on the pipelines between the cooling tower and the first three-way joint and between the cooling tower and the second three-way joint.

6. The wind power blade main mold heating and cooling system according to claim 1, wherein the water pipe is arranged in the SS surface mold in an S shape.

7. The wind power blade main mold heating and cooling system according to claim 1, wherein the water pipe is a copper pipe.

8. The wind power blade main mold heating and cooling system according to claim 1, wherein the heating wires are arranged in the PS-plane mold in an S-shape.

9. The heating and cooling system of the main mold of the wind power blade according to claim 2, wherein temperature sensors are further installed in the SS surface mold and the PS surface mold, and the temperature sensors are connected with the temperature control system.

10. The heating and cooling method for the main mould of the wind power blade is characterized by comprising the following steps of:

when the wind power blade is solidified, the PS surface mould is controlled to be heated through the electric heating system, and meanwhile, the first valve is controlled to be opened, the second valve is controlled to be closed, so that the SS surface mould is controlled to be heated through the heater of the water heating system;

after the wind power blade is solidified, the PS mold is opened, so that the PS surface of the wind power blade is exposed in the air to dissipate heat of the PS surface of the wind power blade through air flow; and meanwhile, the first valve is controlled to be closed, and the second valve is controlled to be opened so as to control the cooling of the SS surface mould through a cooling tower of the water heating system, so that the SS surface of the wind power blade is cooled through a skin in the SS surface mould.