A vehicle-mounted lightweight fully wound fiber-reinforced aluminum lined high-pressure hydrogen storage cylinder

Abstract

The invention discloses a vehicle-mounted lightweight fully wound fiber reinforced aluminum liner high-pressure hydrogen storage cylinder, the hydrogen storage cylinder comprising a variable thickness seamless aluminum alloy liner (100), a reinforcing sleeve (200) installed on a shoulder bottle mouth (104) of the variable thickness seamless aluminum alloy liner (100), a carbon fiber winding layer (300) installed on the outer surface of the variable thickness seamless aluminum alloy liner (100) and the outer surface of the reinforcing sleeve (200), a glass fiber impact-resistant layer (400) installed on the outer surface of the carbon fiber winding layer (300) and the outer surface of the reinforcing sleeve (200), and a sleeve straight thread (201) on the inner surface of the reinforcing sleeve (200) made of aluminum alloy and a bottle mouth straight thread (105) on the outer surface of the shoulder bottle mouth (104) are threadedly connected. The invention has a compact structure, light weight, large bulk density ratio, high working pressure, and a large number of fatigue cycles, and can improve the bottle mouth structure and safety performance, thereby ensuring the operation quality.

Description

Technical Field

[0001] The invention relates to the technical field of vehicle-mounted hydrogen storage cylinders, and specifically to a vehicle-mounted lightweight, fully-wound fiber-reinforced aluminum-lined high-pressure hydrogen storage cylinder with light weight, large volume-to-weight ratio, high working pressure, and a large number of fatigue cycles. Background Art

[0002] High-pressure hydrogen storage cylinders are key devices for new energy vehicle applications, with working pressures of up to 35 to 70 MPa. Limited by the density of hydrogen, it is difficult to significantly increase its hydrogen storage capacity. Under high pressure and high-cycle fatigue, the existing hydrogen storage cylinders use the method of increasing the thickness of the lining, which increases the weight sharply and affects the cruising range. Under high pressure, the mouth of the gas cylinder is often reinforced with a steel sleeve connected by thermal expansion, which may cause deformation of the mouth thread and outward movement of the steel sleeve. It is difficult to smoothly transition between the steel sleeve and the mouth of the bottle or the aluminum alloy lining, which affects the stress distribution of the winding fiber and seriously affects the quality of the hydrogen storage cylinder. Summary of the invention

[0003] The purpose of the present invention is to provide a vehicle-mounted lightweight, fully wound fiber reinforced aluminum lined high-pressure hydrogen storage cylinder with light weight, large volume-to-weight ratio, high working pressure and many fatigue cycles, in order to solve the problems of rapid increase in weight, low cruising range, deformation of bottle mouth thread and outward movement of steel sleeve in existing hydrogen storage cylinders under high pressure and high cycle fatigue.

[0004] The purpose of the present invention is to be solved by the following technical solutions:

[0005] A vehicle-mounted lightweight, fully wound fiber-reinforced aluminum-lined high-pressure hydrogen storage cylinder, characterized in that the hydrogen storage cylinder comprises a variable thickness seamless aluminum alloy liner, a reinforcing sleeve installed on the shoulder bottle mouth of the variable thickness seamless aluminum alloy liner, a carbon fiber winding layer installed on the outer surface of the variable thickness seamless aluminum alloy liner and the outer surface of the reinforcing sleeve, and a glass fiber impact-resistant layer installed on the outer surface of the carbon fiber winding layer and the outer surface of the reinforcing sleeve, and the sleeve straight thread on the inner surface of the reinforcing sleeve made of aluminum alloy and the bottle mouth straight thread on the outer surface of the shoulder bottle mouth are threadedly connected.

[0006] The variable thickness seamless aluminum alloy lining includes an ellipsoidal bottom, an intermediate cylinder smoothly and seamlessly connected to the ellipsoidal bottom, a transition bottle shoulder smoothly and seamlessly connected to the intermediate cylinder, and a shoulder bottle mouth smoothly and seamlessly connected to the transition bottle shoulder. The transition bottle shoulder is a spherical arc and its arc diameter is consistent with the inner diameter of the intermediate cylinder. The inner and outer surfaces of the shoulder bottle mouth are provided with bottle mouth straight threads.

[0007] The transition area between the ellipsoid bottom cover and the middle cylinder, the transition area between the middle cylinder and the transition bottle shoulder, and the transition area between the transition bottle shoulder and the shoulder-connected bottle mouth are reinforced with equal strength or limit load.

[0008] The straight thread of the bottle mouth is paved with an anaerobic sealant, which is prepared by using acrylic resin, initiator, accelerator and stabilizer.

[0009] The inner surface of the pipe mouth of the reinforcement sleeve is provided with a sleeve straight thread, and the outer surface of the reinforcement sleeve is provided with an annular micro-convexity arranged along the axial direction of the reinforcement sleeve, the longitudinal cross-section of the annular micro-convexity is a sinusoidal surface structure and the height of the annular micro-convexity increases step by step at a growth rate of 10% to 20%, and an arc is made on the rear side of the last micro-convexity, and the curvature of the arc is consistent with the transition part of the shoulder bottle mouth and the transition bottle shoulder on the variable thickness seamless aluminum alloy lining.

[0010] The carbon fiber winding layer and the glass fiber impact-resistant layer are sequentially laid on the circumferentially slightly convex surface toward the opening direction of the shoulder bottle mouth, so as to improve the strength of the reinforcing sleeve and prevent the reinforcing sleeve from running outward.

[0011] A bonding layer is provided between the variable thickness seamless aluminum alloy liner and the carbon fiber winding layer. The bonding layer is applied to the outer surface of the variable thickness seamless aluminum alloy liner before the carbon fiber winding layer is wound. The bonding layer material is a resin liquid filler.

[0012] The carbon fiber winding layer adopts T1400 carbon fiber impregnated with resin mixed colloid, and the content of T1400 carbon fiber exceeds 0.52; the impregnated resin mixed colloid is configured by epoxy resin or modified epoxy resin, curing agent, and additives, and the mass ratio of epoxy resin or modified epoxy resin, curing agent, and additives is 1:0.4-0.6:0.1-0.2.

[0013] The carbon fiber winding layer is laid on the outer surface of the variable thickness seamless aluminum alloy liner by circumferential winding and axial spiral winding of equal strength, and the winding scheme of the carbon fiber winding layer is designed by winding stress analysis according to ANSYS software; the middle cylinder part of the variable thickness seamless aluminum alloy liner is wound alternately in sequence by circumferential winding and axial spiral winding; the ellipsoidal bottom seal, transition bottle shoulder and the transition part of the transition bottle shoulder and the shoulder bottle mouth of the variable thickness seamless aluminum alloy liner are wound by variable angle axial spiral winding in combination with the curvature; the shoulder bottle mouth part is wound circumferentially.

[0014] The glass fiber impact-resistant layer adopts S-type glass fiber or E-type glass fiber, and the winding and laying mode of the glass fiber impact-resistant layer is spiral winding and hoop winding in sequence, continuously and alternately.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] The hydrogen storage cylinder of the present invention has a compact structure, light weight, large volume-to-weight ratio, high working pressure, and many fatigue cycles, and can effectively increase the cruising range of new energy vehicles, improve the cylinder mouth structure and safety performance, and thus ensure the operating quality of the hydrogen storage cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Attached Figure 1 It is a schematic structural diagram of the vehicle-mounted lightweight fully wound fiber-reinforced aluminum lined high-pressure hydrogen storage cylinder of the present invention;

[0018] Attached Figure 2 It is a schematic structural diagram of a variable thickness seamless aluminum alloy lining of the present invention;

[0019] Attached Figure 3 It is a schematic diagram of the cross-sectional structure of the reinforcement sleeve of the present invention.

[0020] Among them: 100—variable thickness seamless aluminum alloy lining; 101—ellipsoid bottom; 102—intermediate cylinder; 103—transition bottle shoulder; 104—shoulder bottle mouth; 105—bottle mouth straight thread; 106—anaerobic sealant; 200—reinforcement sleeve; 201—straight sleeve thread; 202—circumferential micro-convexity; 203—arc; 300—carbon fiber winding layer; 400—glass fiber impact-resistant layer. DETAILED DESCRIPTION

[0021] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0022] like Figure 1-3As shown: a vehicle-mounted lightweight fully wound fiber-reinforced aluminum liner high-pressure hydrogen storage cylinder, the hydrogen storage cylinder comprises a variable thickness seamless aluminum alloy liner 100, a reinforcing sleeve 200 installed on the shoulder bottle mouth 104 of the variable thickness seamless aluminum alloy liner 100, a carbon fiber winding layer 300 installed on the outer surface of the variable thickness seamless aluminum alloy liner 100 and the outer surface of the reinforcing sleeve 200, and a glass fiber impact-resistant layer 400 installed on the outer surface of the carbon fiber winding layer 300 and the outer surface of the reinforcing sleeve 200; a bonding layer is provided between the variable thickness seamless aluminum alloy liner 100 and the carbon fiber winding layer 300, and the variable thickness seamless aluminum alloy liner 1 00 and the carbon fiber winding layer 300 are pre-laid with an adhesive layer, which is applied to the outer surface of the variable thickness seamless aluminum alloy liner 100 before the carbon fiber winding layer 300 is wound, and the adhesive layer material is a resin liquid filler; the carbon fiber winding layer 300 uses T1400 carbon fiber impregnated with a resin mixed colloid, and the laying method of the carbon fiber winding layer 300 is equal strength circumferential winding and axial spiral winding. The winding scheme of the carbon fiber winding layer 300 is designed by winding stress analysis according to ANSYS software; the laying method of the glass fiber impact-resistant layer 400 is circumferential winding and axial spiral winding in sequence and continuously alternately laid. The integral blank of the variable thickness seamless aluminum alloy liner 100 is a 6061 aluminum alloy plate and the integral blank of the reinforcing sleeve 200 is a 6061 aluminum alloy seamless tube. The sleeve straight thread 201 on the inner surface of the reinforcing sleeve 200 is threadedly connected with the bottle mouth straight thread 105 on the outer surface of the shoulder bottle mouth 104.

[0023] like Figure 2 As shown, the variable thickness seamless aluminum alloy lining 100 includes an ellipsoid bottom 101, an intermediate cylinder 102 smoothly and seamlessly connected to the ellipsoid bottom 101, a transition bottle shoulder 103 smoothly and seamlessly connected to the intermediate cylinder 102, and a shoulder bottle mouth 104 smoothly and seamlessly connected to the transition bottle shoulder 103. The transition bottle shoulder 103 is a spherical arc and its arc diameter is consistent with the inner diameter of the intermediate cylinder 102. The transition area between the ellipsoid bottom 101 and the intermediate cylinder 102, the transition area between the intermediate cylinder 102 and the transition bottle shoulder 103, and the transition area between the transition bottle shoulder 103 and the shoulder bottle mouth 104 are reinforced with equal strength or limit load. Bottle mouth straight threads 105 are provided on the inner and outer surfaces of the shoulder bottle mouth 104, and an anaerobic sealant 106 is laid on the bottle mouth straight threads 105. The anaerobic sealant 106 is mainly made of acrylic resin and supplemented with a small amount of initiator, promoter and stabilizer.

[0024] like Figure 3As shown, a sleeve straight thread 201 is provided on the inner surface of the pipe mouth of the reinforcement sleeve 200, and the reinforcement sleeve 200 is connected to the bottle mouth straight thread 105 on the shoulder bottle mouth 104 through the sleeve straight thread 201 on the inner surface and the anaerobic sealant 106. An annular micro-protrusion 202 is provided on the outer surface of the reinforcement sleeve 200 along the axial direction of the reinforcement sleeve 200. The longitudinal section of the annular micro-protrusion 202 is a sinusoidal surface structure and the micro-protrusion height of the annular micro-protrusion 202 increases step by step with a growth rate of 10% to 20%. An arc 203 is formed on the rear side of the last micro-protrusion, and the arc 203 is tangent to the transition area between the shoulder bottle mouth 104 and the transition bottle shoulder 103 on the variable thickness seamless aluminum alloy liner 100. The carbon fiber winding layer 300 and the glass fiber impact-resistant layer 400 are sequentially laid on the surface of the annular micro-protrusion 202 toward the opening direction of the shoulder bottle mouth 104 to improve the strength of the reinforcing sleeve 200 and prevent the reinforcing sleeve 200 from leaking out, thereby extending the service life of the shoulder bottle mouth 104.

[0025] Furthermore, the carbon fiber winding layer 300 is made of T1400 carbon fiber impregnated with a resin mixed colloid, and the T1400 carbon fiber content exceeds 0.52; the impregnated resin mixed colloid is configured by epoxy resin or modified epoxy resin, curing agent, and additives, and the mass ratio of epoxy resin or modified epoxy resin, curing agent, and additives is 1:0.4~0.6:0.1~0.2. The carbon fiber winding layer 300 is laid on the outer surface of the variable thickness seamless aluminum alloy liner 100 by equal strength circumferential winding and axial spiral winding. The winding scheme of the carbon fiber winding layer 300 is designed by winding stress analysis based on ANSYS software; the specific scheme is: the middle cylinder 102 of the variable thickness seamless aluminum alloy liner 100 is wound alternately in sequence by circumferential winding and axial spiral winding, and the laying order of a carbon fiber winding layer 300 is given as: 2 layers of circumferential winding + 4 layers of spiral winding + 4 layers of circumferential winding + 6 layers of spiral winding + 6 layers of circumferential winding + 8 layers of spiral winding + 4 layers of circumferential winding + 6 layers of spiral winding + 2 layers of circumferential winding + 4 layers of spiral winding + 4 layers of circumferential winding; the ellipsoidal bottom 101 of the variable thickness seamless aluminum alloy liner 100, the transition bottle shoulder 103 and the transition part of the transition bottle shoulder 103 and the shoulder bottle mouth 104 of the variable thickness seamless aluminum alloy liner 100 adopt variable angle axial spiral winding; the shoulder bottle mouth 104 adopts circumferential winding.

[0026] Furthermore, the glass fiber impact-resistant layer 400 adopts S-type glass fiber or E-type glass fiber, and the winding and laying method of the glass fiber impact-resistant layer 400 is spiral winding and hoop winding, which are continuously and alternately wound in sequence step by step; the laying order of a glass fiber impact-resistant layer 400 is given as: 2 layers of spiral winding and 2 layers of hoop winding, which are continuously and alternately wound in sequence step by step.

[0027] The hydrogen storage cylinder of the present invention has a compact structure, light weight, large volume-to-weight ratio, high working pressure, and many fatigue cycles, and can effectively increase the cruising range of new energy vehicles, improve the cylinder mouth structure and safety performance, and thus ensure the operating quality of the hydrogen storage cylinder.

[0028] The above embodiments are only for illustrating the technical idea of ​​the present invention, and cannot be used to limit the protection scope of the present invention. Any changes made on the basis of the technical solution in accordance with the technical idea proposed by the present invention shall fall within the protection scope of the present invention; any technology not involved in the present invention can be realized by existing technologies.

Claims

1. A vehicle-mounted lightweight fully wound fiber reinforced aluminum lined high pressure hydrogen storage cylinder, characterized in that: The hydrogen storage cylinder comprises a variable thickness seamless aluminum alloy liner (100), a reinforcing sleeve (200) installed on a shoulder bottle mouth (104) of the variable thickness seamless aluminum alloy liner (100), a carbon fiber winding layer (300) installed on the outer surface of the variable thickness seamless aluminum alloy liner (100) and the outer surface of the reinforcing sleeve (200), and a glass fiber impact-resistant layer (400) installed on the outer surface of the carbon fiber winding layer (300) and the outer surface of the reinforcing sleeve (200); a sleeve straight thread (201) on the inner surface of the reinforcing sleeve (200) made of aluminum alloy and a bottle mouth straight thread (105) on the outer surface of the shoulder bottle mouth (104) are threadedly connected; the inner surface of the pipe mouth of the reinforcing sleeve (200) is provided with a sleeve straight thread ( 201), an annular micro-protrusion (202) is provided on the outer surface of the reinforcing sleeve (200) along the axial direction of the reinforcing sleeve (200), the longitudinal cross-section of the annular micro-protrusion (202) is a sinusoidal curved surface structure, and the micro-protrusion height of the annular micro-protrusion (202) increases step by step at a growth rate of 10% to 20%, and an arc (203) is formed on the rear side of the last micro-protrusion, and the curvature of the arc (203) is consistent with the transition part of the shoulder bottle mouth (104) and the transition bottle shoulder (103) on the variable thickness seamless aluminum alloy liner (100); the glass fiber impact-resistant layer (400) adopts S-type glass fiber or E-type glass fiber, and the winding and laying method of the glass fiber impact-resistant layer (400) is spiral winding and annular winding in sequence.

2. The vehicle-mounted lightweight fully wound fiber reinforced aluminum lined high pressure hydrogen storage cylinder according to claim 1 is characterized by: The variable thickness seamless aluminum alloy lining (100) comprises an ellipsoid bottom cover (101), an intermediate cylinder (102) smoothly and seamlessly connected to the ellipsoid bottom cover (101), a transition bottle shoulder (103) smoothly and seamlessly connected to the intermediate cylinder (102), and a shoulder bottle mouth (104) smoothly and seamlessly connected to the transition bottle shoulder (103). The transition bottle shoulder (103) is a spherical arc and its arc diameter is consistent with the inner diameter of the intermediate cylinder (102). The inner and outer surfaces of the shoulder bottle mouth (104) are provided with bottle mouth straight threads (105).

3. The vehicle-mounted lightweight fully wound fiber reinforced aluminum lined high pressure hydrogen storage cylinder according to claim 2 is characterized in that: The transition area between the ellipsoid bottom cover (101) and the intermediate cylinder (102), the transition area between the intermediate cylinder (102) and the transition bottle shoulder (103), and the transition area between the transition bottle shoulder (103) and the shoulder-connected bottle mouth (104) are reinforced with equal strength or ultimate load.

4. The vehicle-mounted lightweight fully wound fiber reinforced aluminum lined high pressure hydrogen storage cylinder according to claim 2 is characterized in that: An anaerobic sealant (106) is laid on the bottle mouth straight thread (105). The anaerobic sealant (106) is prepared by using acrylic resin, an initiator, a accelerator and a stabilizer.

5. The vehicle-mounted lightweight fully wound fiber reinforced aluminum lined high pressure hydrogen storage cylinder according to claim 1 is characterized in that: The carbon fiber winding layer (300) and the glass fiber impact-resistant layer (400) are sequentially laid on the surface of the annular micro-convexity (202) in the direction of the opening of the shoulder bottle mouth (104), so as to improve the strength of the reinforcing sleeve (200) and prevent the reinforcing sleeve (200) from leaking outward.

6. The vehicle-mounted lightweight fully wound fiber reinforced aluminum lined high pressure hydrogen storage cylinder according to claim 1 is characterized in that: A bonding layer is provided between the variable thickness seamless aluminum alloy liner (100) and the carbon fiber winding layer (300). The bonding layer is applied to the outer surface of the variable thickness seamless aluminum alloy liner (100) before the carbon fiber winding layer (300) is wound. The bonding layer material is a resin liquid filler.

7. The vehicle-mounted lightweight fully wound fiber reinforced aluminum lined high pressure hydrogen storage cylinder according to claim 1 is characterized by: The carbon fiber winding layer (300) is made of T1400 carbon fiber impregnated with a resin mixed colloid, and the T1400 carbon fiber content exceeds 0.52; the impregnated resin mixed colloid is configured from epoxy resin or modified epoxy resin, a curing agent, and an additive, and the mass ratio of the epoxy resin or modified epoxy resin, the curing agent, and the additive is 1:0.4-0.6:0.1-0.

2.

8. The vehicle-mounted lightweight fully wound fiber reinforced aluminum lined high pressure hydrogen storage cylinder according to any one of claims 1, 2, 6 and 7, characterized in that: The carbon fiber winding layer (300) is laid on the outer surface of the variable thickness seamless aluminum alloy liner (100) by circumferential winding and axial spiral winding of equal strength, and the winding scheme of the carbon fiber winding layer (300) is designed by winding stress analysis according to ANSYS software; the intermediate cylinder (102) of the variable thickness seamless aluminum alloy liner (100) is wound alternately in sequence by circumferential winding and axial spiral winding; the ellipsoid bottom cover (101) of the variable thickness seamless aluminum alloy liner (100), the transition shoulder (103) and the transition part of the transition shoulder (103) and the shoulder bottle mouth (104) of the variable thickness seamless aluminum alloy liner (100) are wound by axial spiral winding with a variable angle in combination with the arc; the shoulder bottle mouth (104) is wound circumferentially.

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