CN108909441B - High-pressure oil tank composite supporting structure of hybrid electric vehicle - Google Patents

Abstract

The invention relates to a plastic high-pressure fuel tank, in particular to a hybrid vehicle high-pressure fuel tank composite support structure, which includes a non-metallic shell (2-1) and a metal core (3). The metal core (3) is supported by It consists of a plate (3‑1) and a support rod (3‑2). Both ends of the support rod (3‑2) are fixedly connected to the support plate (3‑1). The support plate (3‑1) has a through hole (3‑1‑ 1-2); the non-metallic shell (2-1) is wrapped around the metal core (3), and the through-hole (3-1-1-2) of the support plate (3-1) is filled with the non-metallic shell (2‑1) enables the non-metal shell (2‑1) and the metal core (3) to form an integral structure. The invention can prevent the support structure itself from bearing large additional bending loads on the premise of improving the rigidity of the fuel tank.

Description

Hybrid vehicle high-pressure fuel tank composite support structure

Technical field

The invention relates to a plastic high-pressure fuel tank, and in particular to a composite support structure in the high-pressure fuel tank.

Background technique

The power system of a hybrid vehicle uses a combination of an internal combustion engine and a battery. When the battery is used, the fuel pump stops working, and the gasoline keeps evaporating, causing the fuel tank vapor pressure generated inside the fuel tank to be much higher than that of a traditional car's fuel tank. The internal pressure of a traditional car's fuel tank is generally between 6kpa and 10kpa, while the internal pressure of a hybrid fuel tank is between 35kpa and 45kpa. Therefore, hybrid fuel tanks need to have higher rigidity requirements than traditional fuel tanks. Due to the limitations of its own material mechanical properties, plastic fuel tanks often need to add a certain support structure inside the fuel tank to meet the high stiffness requirements of hybrid vehicle fuel tanks.

The current support structure often uses a single solid plastic and a diabolo-shaped plastic to connect the top and bottom surfaces of the fuel tank, thereby improving the structural rigidity of the fuel tank. Although the above rigid connection structure can significantly improve the rigidity of the fuel tank, since the top and bottom surfaces of the fuel tank are rigidly connected by the structure, when the fuel tank deforms under the action of internal pressure, its internal rigid support structure must not only withstand the pressure inside the fuel tank. In addition to the axial load generated, it also bears the additional bending load caused by the asymmetric deformation of the fuel tank body. The above additional bending load will produce local large stress deformation at the edge of the connection end face between the rigid support structure and the internal fuel tank, thus causing the rigid support structure to When the axial strength is not fully utilized, tearing failure occurs on the connecting end surface.

Contents of the invention

The purpose of the present invention is to overcome the problems existing in the prior art and provide a composite support structure for a high-pressure fuel tank that can prevent the support structure itself from bearing large additional bending loads on the premise of improving the rigidity of the fuel tank.

In order to solve the above technical problems, the hybrid vehicle high-pressure fuel tank composite support structure of the present invention includes a non-metallic shell and a metal core. The metal core is composed of a support plate and a support rod. Both ends of the support rod are fixedly connected to the support plate. The support plate has Through hole; the non-metallic shell is wrapped around the metal core, and the through-hole of the support plate is filled with the non-metallic shell so that the non-metallic shell and the metal core form an integral structure.

Preferably, the support plate is a disc support disc, the disc support disc is provided with a number of radial grooves penetrating along the axial direction, and the disc support plate is provided with a number of penetrating first holes.

Preferably, the support plate is a spoke support plate, and the spoke support plate is composed of several spokes, and several second through holes are opened on the spokes.

Preferably, two support disks, namely a spoke support disk and a disk support disk, are respectively fixed at both ends of the support rod. The spoke support disk is located outside the disk support disk, and the connection between the spoke support disk and the support rod is rounded. The connection between the support plate and the support rod is rounded.

Preferably, a support rod spacer is fixedly connected to the middle part of the support rod, and the support rod spacer has a third through hole.

Preferably, the support rod has a structure with large ends and a small center, and the diameter of the support rod gradually becomes smaller from both ends to the middle.

Preferably, the non-metallic shell is provided with reinforcing ribs.

Preferably, the connection between the support rod and the support plates at both ends is rounded.

Preferably, the first hole is circular, and the first hole is arranged circumferentially; the radial groove is a U-shaped structure, and the radial groove is arranged circumferentially.

Preferably, the second hole is rectangular.

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

First, the new composite support structure in the high-pressure fuel tank includes a non-metallic shell and a metal core. The non-metallic shell surrounds the metal core and passes through the hole of the support plate on the core to strengthen the connection and prevent tearing. The effect of cracking.

Second, the support plate is slotted and made into a spoke structure to increase the elasticity of the support structure to absorb the energy when the fuel tank deforms. The support rods are fixedly connected with support rod spacers at certain intervals. The support rod spacers have small holes through them to prevent the non-metallic shell from falling off the support rods. The support rod has a curved structure, with a larger diameter at both ends and a gradually smaller diameter toward the middle, in order to further improve the elasticity of the composite support structure.

Third, the connection performance between the non-metallic shell and the support rod has been greatly improved, the elasticity of the composite support structure has been improved, and the transition fillet at the support rod has reduced stress concentration.

Description of the drawings

Figure 1 is a schematic structural diagram of the high-pressure fuel tank of the present invention;

Figure 2 is a schematic structural diagram of the composite support structure of the present invention;

Figure 3 is a schematic structural diagram of the metal core of the composite support structure of the present invention;

Figure 4 is a schematic structural diagram of the disc support plate of the present invention;

Figure 5 is a schematic structural diagram of the spoke support plate of the present invention;

Figure 6 is a schematic structural diagram of the metal core of the composite support structure of the present invention (the spoke support discs and the disc support discs are respectively fixed at both ends);

Figure 7 is a schematic diagram of the composite support structure of the high-pressure fuel tank of the present invention (the spoke support disks and the disc support disks are respectively fixed at both ends of the metal core).

Detailed ways

As shown in Figure 1-7, a hybrid vehicle high-pressure fuel tank composite support structure 2 is provided in the high-pressure fuel tank 1. The hybrid vehicle high-pressure fuel tank composite support structure 2 includes a non-metallic shell 2-1 and a metal core 3. The metal core 3 is composed of a support plate 3-1 and a support rod 3-2. Both ends of the support rod 3-2 are fixedly connected. Support plate 3-1, the support plate 3-1 has a through hole 3-1-1-2; the non-metallic shell 2-1 is wrapped on the metal core 3, and the through hole 3-1- of the support plate 3-1 1-2 is filled with the non-metallic shell 2-11 so that the non-metallic shell 2-1 and the metal core 3 form an integral structure.

The support plate 3-1 is a disc support plate 3-1-1, and the disc support plate 3-1-1 is provided with a number of radial grooves 3-1-1-1 that penetrate along the axial direction. 3-1-1 is provided with several through first holes 3-1-1-2.

The support plate 3-1 is a spoke support plate 3-1-2. The spoke support plate 3-1-2 is composed of several spokes 3-1-2-1. There are several spokes 3-1-2-1. The second hole through is 3-1-2-2.

Two support disks, namely the spoke support disk 3-1-2 and the disk support disk 3-1-1, are respectively fixed at both ends of the support rod 3-2. The spoke support disk 3-1-2 is located at the disk support disk 3-1- 1. On the outside, the connection between the spoke support plate 3-1-2 and the support rod 3-2 is rounded, and the connection between the disk support plate 3-1-1 and the support rod 3-2 is rounded.

A support rod spacer 3-5 is fixedly connected to the middle part of the support rod 3-2, and the support rod spacer 3-5 has a through third hole 3-5-1.

The support rod 3-2 has a structure with large ends and a small center. The diameter of the support rod 3-2 gradually becomes smaller from both ends to the middle.

The non-metal shell 2-1 is provided with reinforcing ribs.

The connection between the support rod 3-2 and the support plates 3-1 at both ends is provided with rounded corners.

The first hole 3-1-1-2 is circular, and the first hole 3-1-1-2 is arranged circumferentially; the radial groove 3-1-1-1 is a U-shaped structure, and the radial groove 3-1- 1-1 circumferential setting.

The second hole 3-1-2-2 is rectangular.

The non-metallic shell surrounds the metal core and passes through the hole of the support plate on the core to strengthen the connection and prevent tearing. The support plate is slotted and made into a spoke structure to increase the elasticity of the support structure to absorb energy when the fuel tank deforms.

The support rods are fixedly connected with support rod spacers at certain intervals. The support rod spacers have small holes through them to prevent the non-metallic shell from falling off the support rods.

The support rod has a curved structure, with a larger diameter at both ends and a gradually smaller diameter toward the middle, in order to further improve the elasticity of the composite support structure.

The connection performance between the non-metallic shell and the support rod has been greatly improved, the elasticity of the composite support structure has been improved, and the transition fillet at the support rod has reduced stress concentration.

Claims (4)

1. The composite supporting structure of the high-pressure oil tank of the hybrid electric vehicle is characterized by comprising a non-metal shell (2-1) and a metal core body (3), wherein the metal core body (3) consists of a supporting disc (3-1) and a supporting rod (3-2), and the supporting disc (3-1) comprises a disc supporting disc (3-1-1) and a spoke supporting disc (3-1-2);

a plurality of radial grooves (3-1-1-1) which are communicated along the axial direction are arranged on the disc support disc (3-1-1), and a plurality of first holes (3-1-1-2) which are communicated are arranged on the disc support disc (3-1-1);

the spoke support disc (3-1-2) consists of a plurality of spokes (3-1-2-1), and a plurality of through second holes (3-1-2-2) are formed in the spokes (3-1-2-1);

one end of the supporting rod (3-2) is fixedly provided with a spoke supporting disc (3-1-2) and a disc supporting disc (3-1-1), the other end of the supporting rod is fixedly provided with the spoke supporting disc (3-1-2) and the disc supporting disc (3-1-1), the spoke supporting disc (3-1-2) is positioned at the outer side of the disc supporting disc (3-1-1), the connection part of the spoke supporting disc (3-1-2) and the supporting rod (3-2) is provided with a rounding corner, and the connection part of the disc supporting disc (3-1-1) and the supporting rod (3-2) is provided with a rounding corner;

the middle part of the supporting rod (3-2) is fixedly connected with a supporting rod separation disc (3-5), and a third hole (3-5-1) which is communicated is formed in the supporting rod separation disc (3-5);

the supporting rod (3-2) is of a structure with two large ends and a small middle, and the diameters from the two ends to the middle of the supporting rod (3-2) are gradually reduced;

the nonmetallic shell (2-1) is wrapped on the metal core (3), and the nonmetallic shell (2-1) is filled in the first hole (3-1-1-2) on the disc support disc (3-1-1) and the second hole (3-1-2-2) on the spoke support disc (3-1-2) so that the nonmetallic shell (2-1) and the metal core (3) form an integral structure.

2. The hybrid electric vehicle high-pressure oil tank composite support structure according to claim 1, wherein the nonmetallic shell (2-1) is provided with reinforcing ribs.

3. The hybrid vehicle high-pressure tank composite support structure according to claim 1, wherein the first hole (3-1-1-2) is circular, and the first hole (3-1-1-2) is circumferentially arranged; the radial groove (3-1-1-1) is of a U-shaped structure, and the radial groove (3-1-1-1) is circumferentially arranged.

4. The hybrid vehicle high pressure tank composite support structure according to claim 1, characterized in that the second hole (3-1-2-2) is rectangular.