Pressure applying bag and preparation method thereof
By designing a pressure bag including a contact layer, a gas guide layer and a bag body, the problem of insufficient sealing in the vane defect area is solved, and higher repair quality and lower repair weight and torque matching risks are achieved.
Patent Information
- Application Number
- CN202411845601.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-13
- Publication Date
- 2025-03-07
AI Technical Summary
The insufficient sealing of the defective areas of the blade leads to low repair quality and easy air leakage during repair, which increases the risk of repair weight and torque matching.
A pressure pouch is designed, including a contact layer, an air conducting layer and a bag body. The contact layer has a bonding surface and a glue absorbing layer. The air conducting layer is located on the back of the contact layer. The bag body is equipped with an air extraction port and a sealing area. These structures enable sealing and repairing the defective areas of the blade.
It effectively ensures the sealing of the defective areas of the blade, avoids the problem of air leakage during the repair process, improves the quality of repair, and reduces the risk of repair weight and torque matching.
Smart Images
Figure CN119572438A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of blade maintenance, and more specifically, to a pressure bag and a preparation method thereof. Background Art
[0002] The sealing of the defective area of the blade has a great impact on the blade defect repair work at the operation site. When there is air leakage in the lining or the surrounding area, a large amount of leak detection, rework and repair work can only be carried out repeatedly, and even the original injection molding is changed to a hand lay-up production plan. The additional repair weight increases the weight of the entire blade and the risk of torque balancing.
[0003] In order to ensure the sealing of the defective area of the blade, a layer of vacuum bag or two or more vacuum bags are usually bonded above the defective area of the blade with sealing strips, and then injection is performed, and the air in the area is extracted to achieve pressurization. However, when the air in this area is extracted, it will directly cause air leakage in the penetration area again, resulting in holes in the operating base layer of the defective area of the blade, air leakage, and poor sealing, which will affect the repair quality of the blade.
[0004] Therefore, how to ensure the sealing of the defective area of the blade and improve the repair quality of the blade has become a technical problem that needs to be solved urgently by technical personnel in this field. Summary of the invention
[0005] In view of this, the purpose of the present application is to provide a pressure bag to ensure the sealing of the defective area of the blade and improve the repair quality of the blade.
[0006] Another object of the present application is to provide a method for preparing the pressure bag mentioned above.
[0007] To achieve the above objectives, this application provides the following technical solutions:
[0008] A pressure bag, comprising:
[0009] The pressure bag body comprises a contact layer, an air guide layer and a bag body sealed with the contact layer, the contact layer having a bonding surface for bonding with a defective area of a blade, a glue absorbing layer being arranged on the bonding surface, the glue absorbing layer being used for absorbing excess repair material on a base layer of the defective area of the blade, the air guide layer being located on a side of the contact layer away from the bonding surface, the bag body being provided with an air suction port connected with the air guide layer and a sealing area for bonding with an edge of the defective area of the blade.
[0010] Optionally, in the above-mentioned pressure bag, the pressure bag body further includes a pressurization auxiliary layer, and the pressurization auxiliary layer is located above the air guide layer.
[0011] Optionally, in the above-mentioned pressure bag, the bag body is a tough plastic film or a vacuum bag; and / or,
[0012] The adhesive absorbing material of the adhesive absorbing layer is glass fiber cloth or adhesive absorbing felt; and / or,
[0013] The material of the pressurizing auxiliary layer is a foamed hard material; and / or,
[0014] The material of the air guide layer is air guide felt.
[0015] Optionally, in the above-mentioned pressure bag, the sealing area is provided with an adhesive layer for sealing and fixing with the edge of the defective area of the blade.
[0016] Optionally, in the above-mentioned pressure bag, an air guide tube extending into the bag body is provided at the position of the air suction port, one end of the air guide tube is connected to the air guide layer, and the other end of the air guide tube is used to connect to the air suction device.
[0017] Optionally, in the above-mentioned pressure bag, the adhesive absorbing layer and the contact layer are an integrated structure.
[0018] Optionally, in the above-mentioned pressure bag, the projected area of the adhesive absorbing layer is not larger than the projected area of the laminating surface of the contact layer.
[0019] A method for preparing a pressure bag, wherein the pressure bag is a pressure bag as described in any one of the above items, comprising the steps of:
[0020] Adhere the adhesive absorbing material to the bonding surface of the contact layer to form an adhesive absorbing layer;
[0021] Laying a pressurization layer, wherein the pressurization layer is laid on the contact layer, wherein the pressurization layer includes the air guide layer;
[0022] Connecting the bag body, connecting and sealing the bag body and the contact layer to form the pressure bag body, and the air extraction port on the bag body is connected to the air guide layer;
[0023] A sealing material is adhered to form the sealing area at the connection position between the bag body and the contact layer.
[0024] Optionally, in the above-mentioned method for preparing a pressure bag, in the step of laying the pressurization layer, the pressurization layer further includes a pressurization auxiliary layer laid on top of the air guide layer.
[0025] Optionally, in the above-mentioned method for preparing the pressure bag, the following steps are further included:
[0026] Inspect the air extraction port and test the sealing performance of the air extraction port.
[0027] The pressure bag provided by the present application can ensure the sealing of the defective area of the blade by fitting the fitting surface of the contact layer to the defective area of the blade, and fitting the sealing area of the bag body to the edge of the defective area of the blade. At this time, the air in the bag body is extracted through the air suction port on the bag body that is connected to the air guide layer, so that the pressure bag body applies pressure to the repair material of the defective area of the blade, and the excess repair material can be absorbed by the adhesive absorption layer set on the fitting surface of the contact layer until the repair material is solidified, thereby completing the repair of the base layer of the defective area of the blade. It can be seen from the above examples that the pressure bag provided by the present application can ensure the sealing of the defective area of the blade, and the air in the bag body can be extracted through the air suction port on the bag body, and the excess repair material can be absorbed by the adhesive absorption layer set on the fitting surface of the contact layer, so that it can be avoided that the base layer of the defective area of the blade leaks again when the air in the bag body is extracted, thereby improving the repair quality of the blade.
[0028] The technical features mentioned above, the technical features to be mentioned below, and the technical features shown separately in the drawings can be combined with each other arbitrarily, as long as the combined technical features are not contradictory. All feasible feature combinations are technical contents clearly recorded in this article. Any of the multiple sub-features contained in the same sentence can be applied independently, and does not have to be applied together with other sub-features. BRIEF DESCRIPTION OF THE DRAWINGS
[0029] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are merely embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.
[0030] Figure 1 A schematic diagram of the structure of a pressure bag provided in an embodiment of the present application;
[0031] Figure 2 The process of the pressure bag preparation method provided in the embodiment of the present application Figure 1 ;
[0032] Figure 3 The process of preparing the pressure bag provided in the embodiment of the present application Figure 2 .
[0033] Among them, 100 is the pressure bag body, 101 is the contact layer, 102 is the air guide layer, 103 is the bag body, 104 is the glue absorption layer, 105 is the air extraction port, 106 is the sealing area, and 107 is the pressurization auxiliary layer. DETAILED DESCRIPTION
[0034] The core of this application is to provide a pressure bag to ensure the sealing of the defective area of the blade and improve the repair quality of the blade.
[0035] Another core of the present application is to provide a method for preparing the pressure bag mentioned above.
[0036] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.
[0037] The sealing of the defective area of the blade has a great influence on the blade defect repair work at the operation site. In order to ensure the sealing of the defective area of the blade, a layer of vacuum bag or 2 or more vacuum bags are usually bonded on the top of the defective area of the blade using sealing strips, and then infusion is performed and pressurization is achieved by extracting the air from the area. However, when the air in this area is extracted, it will directly cause air leakage in the penetration area again, resulting in holes in the operating base layer of the defective area of the blade and air leakage and poor sealing, which will affect the repair quality of the blade.
[0038] For this reason, Figure 1 As shown, the embodiment of the present application discloses a pressure bag, including a pressure bag body 100. The pressure bag can ensure the sealing of the defective area of the blade, and the air in the bag body 103 can be extracted through the air extraction port 105 on the bag body 103, and the excess repair material can be absorbed through the adhesive absorption layer 104 arranged on the bonding surface of the contact layer 101, so as to avoid the base layer of the defective area of the blade from leaking again when the air in the bag body 103 is extracted, thereby improving the repair quality of the blade.
[0039] The following will be combined Figure 1 The pressure bag disclosed in the embodiment of the present application is specifically explained and illustrated.
[0040] Among them, Figure 1 As shown, the pressure bag body 100 may include a contact layer 101, an air guide layer 102, and a bag body 103 sealed and connected to the contact layer 101. The bag body 103 and the contact layer 101 may be made of soft materials with good sealing and flexibility, such as a tough plastic film, a vacuum bag, etc., so that they are sealed and connected to the contact layer 101 to form the main structure of the pressure bag body 100. Of course, the bag body 103 and the contact layer 101 may be an integrated structure for easy mass production, or a split structure bonded together by a sealing tape so that they can be manufactured on site to improve the convenience of repairing the defective area of the blade.
[0041] An air guide layer 102 may be laid on the contact layer 101, that is, the air guide layer 102 is located on the side of the contact layer 101 away from the bonding surface, and an air extraction port 105 connected to the air guide layer 102 is provided on the bag body 103, so as to be connected to the air extraction device through the air extraction port 105, and the internal air of the pressure bag is extracted, so that the pressure bag forms a vacuum state, and then the pressure bag presses the repair material of the blade defect area until the repair material is solidified, thereby completing the repair of the base layer of the blade defect area. The material of the air guide layer 102 can be air guide felt.
[0042] At the same time, the contact layer 101 has a fitting surface that fits the defective area of the blade, and a glue absorbing layer 104 may be provided on the fitting surface, and the projected area of the glue absorbing layer 104 is not larger than the projected area of the fitting surface of the contact layer 101, so that the glue absorbing layer 104 can absorb the excess repair material on the base layer of the defective area of the blade, thereby ensuring the quality of the base layer of the defective area of the blade. Among them, the material of the glue absorbing layer 104 can be a relatively soft and fluffy glue absorbing felt or glass fiber cloth with discrete small gap spaces to accommodate the excess repair material. It should be noted that the glue absorbing layer 104 can be laid separately between the fitting surface of the contact layer 101 and the base layer of the defective area of the blade. Of course, the glue absorbing layer 104 can also be directly made into an integrated structure with the contact layer 101, which is not limited in this article.
[0043] In order to ensure the tightness of the pressure bag and the defective area of the blade, Figure 1 As shown, a sealing area 106 is provided on the bag body 103, and the sealing area 106 can be sealed with the edge of the blade defect area. Specifically, an adhesive layer can be provided in the sealing area 106 to seal with the edge of the blade defect area, so that the sealing area 106 of the bag body 103 can be adhered and fixed to the blade defect area, thereby ensuring the sealing of the pressure bag and the blade defect area. The adhesive layer can be formed by coating the sealing area 106 of the bag body 103 with a sealant, or by pasting a sealing strip on the sealing area 106, so as to achieve the adhesion and fixation of the sealing area 106 of the bag body 103 with the blade defect area.
[0044] like Figure 1 As shown, the pressure bag body 100 also includes a pressurizing auxiliary layer 107, and the pressurizing auxiliary layer 107 is located above the air guide layer 102, so as to provide appropriate auxiliary pressure for the repair material on the base layer of the blade defect area during the repair molding process, thereby improving the molding quality of the blade substrate. Among them, the material of the pressurizing auxiliary layer 107 can be a lightweight material with good plasticity and a certain thickness, such as a foamed hard material, so that the pressurizing auxiliary layer 107 can better adapt to the shape of the blade defect area, ensure that the repair material on the base layer of the blade defect area is provided with appropriate auxiliary pressure during the repair molding process, thereby improving the molding quality of the blade substrate.
[0045] like Figure 1 As shown, in order to facilitate the extraction of the internal air of the pressure bag, an air guide tube extending into the bag body 103 is provided at the position of the air suction port 105, and one end of the air guide tube is connected to the air guide layer 102, and the other end of the air guide tube can be connected to the air suction device. At the same time, sealant can be filled at the connection position between the air suction port 105 and the air guide tube to ensure the peripheral sealing of the air suction port 105.
[0046] It can be seen from the above embodiments that the sealing of the blade defect area can be ensured by laminating the laminating surface of the contact layer 101 with the blade defect area and laminating the sealing area 106 of the bag body 103 with the edge of the blade defect area. At this time, the air in the bag body 103 is extracted through the air suction port 105 on the bag body 103 which is connected to the air guide layer 102102, so that the pressure bag body 100 applies pressure to the repair material in the defective area of the blade, and the excess repair material can be absorbed by the glue absorption layer 104 arranged on the fitting surface of the contact layer 101 until the repair material is solidified, thereby completing the repair of the base layer in the defective area of the blade. This can avoid leakage of the base layer in the defective area of the blade again when the air in the bag body 103 is extracted, and eliminate the risk of secondary or multiple rework and repair due to leakage of the base layer in the defective area of the blade, facilitate subsequent perfusion and maintenance work, and improve the repair quality of the blade. At the same time, the pressure bag can be prefabricated in batches in advance, shortening the overall blade damage repair cycle, reducing the workload of on-site operators and related supporting personnel, improving the repair efficiency of the blade, and reducing the material and labor costs for rework and repair, thereby achieving the effect of reducing costs and increasing efficiency.
[0047] The present application also discloses a method for preparing a pressure bag. The pressure bag is the pressure bag disclosed in the above embodiment, and therefore has all the technical effects of the above pressure bags, which will not be described in detail herein. Figure 2 As shown, the method for preparing a pressure bag includes step S100 of adhering a glue absorbing material, step S101 of laying a pressurizing layer, step S102 of connecting a bag body, and step S103 of adhering a sealing material.
[0048] The following will be combined Figures 1 to 3 The method for preparing the pressure bag disclosed in the embodiment of the present application is specifically explained and illustrated.
[0049] S100, adhesive suction material;
[0050] like Figure 1As shown, adhesive absorbing materials such as adhesive absorbing felt or glass fiber cloth are adhered to the bonding surface of the contact layer 101 and the blade defect area to form an adhesive absorbing layer 104, and it is ensured that the surroundings of the adhesive absorbing layer 104 are not larger than the edge of the contact layer 101, that is, the projected area of the adhesive absorbing layer 104 is not larger than the projected area of the bonding surface of the contact layer 101, so that the excess repair material on the base layer of the blade defect area is absorbed by the adhesive absorbing layer 104 to ensure the quality of the base layer of the blade defect area. Among them, the contact layer 101 can be a flexible sealing material such as a tough plastic film or a vacuum bag with a single or double layer structure, which is not limited herein.
[0051] S101, laying the pressurization layer;
[0052] like Figure 1 As shown, a pressurization layer is laid on the contact layer 101, wherein the pressurization layer may include an air guide layer 102. Specifically, an air guide material such as air guide felt may be laid on the side of the contact layer 101 away from the bonding surface to form the air guide layer 102.
[0053] S102, connecting the bag body;
[0054] like Figure 1 As shown, the bag body 103 and the contact layer 101 are connected and sealed to form the pressure bag body 100, and the air extraction port 105 on the bag body 103 is connected to the air guide layer 102. Specifically, the bag body 103 made of a lightweight material such as a tough plastic film or a vacuum bag and the contact layer 101 can be bonded together by a sealant to form a sealed pressure bag body 100. At the same time, the air extraction port 105 on the bag body 103 is connected to the air guide layer 102, so that the air extraction port 105 on the bag body 103 is connected to the air extraction device, so that the internal air of the pressure bag can be extracted, so that the pressure bag forms a vacuum state, and then the pressure bag presses the repair material of the blade defect area until the repair material is solidified, thereby completing the repair of the base layer of the blade defect area.
[0055] S103, adhesion of sealing material;
[0056] like Figure 1 As shown, a sealing material is adhered at the connection position between the bag body 103 and the contact layer 101 to form a sealing area 106. Specifically, the sealing area 106 can be formed by coating a sealing adhesive or adhering a sealing material such as a sealing strip at the connection position between the bag body 103 and the contact layer 101, so that the sealing area 106 can be attached to and bonded to the edge of the defective area of the blade, thereby ensuring the sealing of the pressure bag and the defective area of the blade.
[0057] like Figure 3As shown, the method for preparing the pressure bag further includes step S104 of inspecting the air suction port. In step S104, the airtightness around the air suction port 105 needs to be inspected. Specifically, the air suction and pressure maintenance inspection can be performed on the air suction port 105 to ensure the airtightness of the pressure bag.
[0058] like Figure 1 As shown, in step S101 of laying the pressurization layer, the pressurization layer may further include a pressurization auxiliary layer 107 laid on the air guide layer 102. Specifically, a lightweight material with good plasticity and a certain thickness, such as a foamed hard material, may be used to lay on the air guide layer 102 to form the pressurization auxiliary layer 107, so that the pressurization auxiliary layer 107 can better adapt to the shape of the defective area of the blade, ensure that a moderate auxiliary pressure is provided for the repair material on the base layer of the defective area of the blade during the repair molding process, and thus improve the molding quality of the blade substrate.
[0059] The terms "first" and "second" and the like in the specification and claims of this application and the above drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but may include steps or units that are not listed.
[0060] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A pressure bag, characterized in that: include: A pressure bag body (100), the pressure bag body (100) comprising a contact layer (101), an air guide layer (102) and a bag body (103) sealed to the contact layer (101), the contact layer (101) having a bonding surface for bonding to a defective area of a blade, a glue absorbing layer (104) being provided on the bonding surface, the glue absorbing layer (104) being used to absorb excess repair material on a base layer of the defective area of the blade, the air guide layer (102) being located on a side of the contact layer (101) away from the bonding surface, and the bag body (103) being provided with an air suction port (105) communicating with the air guide layer (102) and a sealing area (106) for bonding to an edge of the defective area of the blade.
2. The pressure bag according to claim 1, characterized in that: The pressure bag body (100) further comprises a pressurizing auxiliary layer (107), wherein the pressurizing auxiliary layer (107) is located above the air guiding layer (102).
3. The pressure bag according to claim 2, characterized in that: The bag body (103) is a tough plastic film or a vacuum bag; and / or, The adhesive absorbing material of the adhesive absorbing layer (104) is glass fiber cloth or adhesive absorbing felt; and / or, The material of the pressurizing auxiliary layer (107) is a foamed hard material; and / or, The material of the air guide layer (102) is air guide felt.
4. The pressure bag according to claim 1, characterized in that: The sealing area (106) is provided with an adhesive layer for sealing and fixing with the edge of the defective area of the blade.
5. The pressure bag according to claim 1, characterized in that: An air guide tube extending into the bag body (103) is provided at the position of the air extraction port (105); one end of the air guide tube is connected to the air guide layer (102); and the other end of the air guide tube is used to be connected to an air extraction device.
6. The pressure bag according to claim 1, characterized in that: The adhesive absorbing layer (104) and the contact layer (101) are an integrated structure.
7. The pressure bag according to claim 1, characterized in that: The projected area of the adhesive absorbing layer (104) is no greater than the projected area of the bonding surface of the contact layer (101).
8. A method for preparing a pressure bag, wherein the pressure bag is the pressure bag according to any one of claims 1 to 7, characterized in that: Includes steps: Adhere a glue absorbing material to form a glue absorbing layer (104) by adhering the glue absorbing material to the bonding surface of the contact layer (101); Laying a pressurization layer, wherein the pressurization layer is laid on the contact layer (101), the pressurization layer comprising the air guide layer (102); Connecting the bag body, connecting and sealing the bag body (103) and the contact layer (101) to form the pressure bag body (100), and the air extraction port (105) on the bag body (103) is in communication with the air guide layer (102); A sealing material is adhered to form the sealing area (106) at the connection position between the bag body (103) and the contact layer (101).
9. The method for preparing a pressure bag according to claim 8, characterized in that: In the step of laying the pressurization layer, the pressurization layer further comprises a pressurization auxiliary layer (107) laid on top of the air guide layer (102).
10. The method for preparing a pressure bag according to claim 8, characterized in that: Also includes the steps: Inspect the air extraction port and test the sealing performance of the air extraction port (105).