Protective structure for coil component of hydrogen injector

Abstract

The utility model relates to a protection structure for a coil component of a hydrogen ejector. An installation fixing plate is fixed outside a hydrogen ejector main body, a coil framework is sleeved outside the hydrogen ejector main body, an enameled wire winding is installed on the coil framework, a magnetic conductive shell is sleeved outside the coil framework, and a coil plastic coating is sleeved outside the magnetic conductive shell. A locking nut is fixed to the upper end of the hydrogen ejector body, a first O-shaped sealing ring is installed between the locking nut and the coil plastic coating, and the first O-shaped sealing ring makes contact with the lower end face of the locking nut and the upper end face of the coil plastic coating. A second O-shaped sealing ring is installed among the installation fixing plate, the hydrogen ejector body and the coil plastic coating, and the second O-shaped sealing ring makes contact with the upper surface of the installation fixing plate, the outer circle of the hydrogen ejector body and the inner circle of the lower end of the coil plastic coating. According to the utility model, the protection performance of the coil component of the hydrogen ejector can be improved, and the working reliability of the hydrogen ejector in various severe working conditions such as high temperature, high humidity, temperature alternation and the like is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of hydrogen injectors, and specifically discloses a protection structure for a hydrogen injector coil component. Background Art

[0002] The hydrogen injector precisely regulates the hydrogen flow rate and pressure entering the fuel cell stack, and is an important component in the hydrogen supply subsystem of the hydrogen fuel cell. In the energized state, the external coil of the hydrogen injector generates a magnetic field, and the internal valve core generates an electromagnetic force under the action of the magnetic field. The electromagnetic force overcomes other external forces to displace the valve core, thereby changing the opening degree of the hydrogen injector and realizing the regulation of the hydrogen flow rate and pressure entering the stack.

[0003] The coil component outside the hydrogen injector is an important component for realizing the function of the hydrogen injector. In the actual application process, since it is usually placed outside the hydrogen injector, the working environment of the coil component has various harsh conditions such as high temperature, high humidity, and temperature alternation. When the external high-humidity gas penetrates into the coil component, it will greatly weaken the insulation withstand voltage performance of the internal enameled wire, and even pose a risk of coil short circuit and burnout, causing the function of the hydrogen injector to fail. Therefore, the protection performance of the coil component is extremely important.

[0004] The existing hydrogen injector coil components usually wind the enameled wire through a coil skeleton first, and then perform plastic coating (such as nylon) on the wound coil for the enameled wire. There are gaps between the plastic coating and the coil skeleton. Under the harsh conditions of high temperature and high humidity for a long time, water vapor will enter the enameled wire through the gaps, affecting the service life of the coil component. Summary of the Invention

[0005] The purpose of the utility model is to overcome the deficiencies existing in the prior art, and provide a protection structure for a hydrogen injector coil component, which can improve the protection performance of the hydrogen injector coil component and ensure the reliability of the hydrogen injector working in various harsh conditions such as high temperature, high humidity, and temperature alternation.

[0006] According to the technical solution provided by the utility model, the protection structure for the hydrogen injector coil component includes a locking nut, a coil plastic coating, a coil skeleton, a magnetic conduction housing, an enameled wire winding, a hydrogen injector main body, a mounting fixing plate, a first O-ring and a second O-ring;

[0007] A hydrogen injector main body mounting hole is opened on the mounting fixing plate, and the mounting fixing plate is fixed to the outside of the hydrogen injector main body through the hydrogen injector main body mounting hole. The coil skeleton is sleeved on the outside of the hydrogen injector main body, the enameled wire winding is installed on the coil skeleton, the magnetic conduction housing is sleeved on the outside of the coil skeleton, and the coil plastic coating is sleeved on the outside of the magnetic conduction housing;

[0008] A locking nut is fixed to the upper end of the hydrogen injector body. The first O-ring seal is installed between the locking nut and the coil plastic coating. The first O-ring seal contacts the lower end face of the locking nut and the upper end face of the coil plastic coating.

[0009] The second O-ring seal is installed between the mounting fixed plate, the hydrogen injector body and the coil plastic coating. The second O-ring seal contacts the upper surface of the mounting fixed plate, the outer circle of the hydrogen injector body and the inner circle of the lower end of the coil plastic coating.

[0010] Preferably, the mounting fixed plate is press-fitted onto the outside of the hydrogen injector body through the hydrogen injector body mounting hole.

[0011] Preferably, an annular coil plastic coating protrusion is provided on the upper end face of the coil plastic coating, and an annular locking nut protrusion is provided on the lower end face of the locking nut. The locking nut protrusion is located inside the coil plastic coating protrusion, and the first O-ring seal is restricted between the locking nut protrusion and the coil plastic coating protrusion.

[0012] Preferably, the inner circle of the lower end of the coil plastic coating is conical, and the small end of the inner circle of the lower end of the coil plastic coating faces upward and the large end faces downward.

[0013] The utility model has the following advantages:

[0014] 1. A coil plastic coating is sleeved outside the magnetic conductive housing, improving the overall protection performance;

[0015] 2. It can effectively prevent external water vapor from entering the enameled wire winding;

[0016] 3. A mounting fixed plate is provided below the coil plastic coating. The mounting fixed plate is installed on the hydrogen injector body by press-fitting. While providing a support surface for the coil component after locking and fixing, the angle between the coil component and the mounting fixed plate can be adjusted in real time according to different customer requirements, which is convenient and fast.

[0017] 4. It can improve the protection performance of the hydrogen injector coil component and ensure the reliability of the hydrogen injector working in various harsh working conditions such as high temperature, high humidity and temperature alternation. Description of the Drawings

[0018] Figure 1 It is a structural schematic diagram of the utility model. Detailed Embodiment

[0019] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the following will clearly and completely describe the technical solutions of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative efforts fall within the scope of protection of the present utility model.

[0020] A protection structure for a hydrogen injector coil component, as Figure 1 shown, it includes a locking nut 1, a coil plastic coating 2, a coil skeleton 3, a magnetic conductive housing 4, an enameled wire winding 5, a hydrogen injector main body 6, a mounting fixing plate 7, a first O-ring 8.1 and a second O-ring 8.2;

[0021] A hydrogen injector main body mounting hole is provided on the mounting fixing plate 7, and the mounting fixing plate 7 is fixed to the outside of the hydrogen injector main body 6 through the hydrogen injector main body mounting hole. The coil skeleton 3 is sleeved on the outside of the hydrogen injector main body 6, the enameled wire winding 5 is mounted on the coil skeleton 3, the magnetic conductive housing 4 is sleeved on the outside of the coil skeleton 3, and the coil plastic coating 2 is sleeved on the outside of the magnetic conductive housing 4;

[0022] The locking nut 1 is fixed to the upper end of the hydrogen injector main body 6, and the first O-ring 8.1 is installed between the locking nut 1 and the coil plastic coating 2. The first O-ring 8.1 contacts the lower end surface of the locking nut 1 and the upper end surface of the coil plastic coating 2;

[0023] The second O-ring 8.2 is installed between the mounting fixing plate 7, the hydrogen injector main body 6 and the coil plastic coating 2. The second O-ring 8.2 contacts the upper surface of the mounting fixing plate 7, the outer circle of the hydrogen injector main body 6 and the inner circle 2.2 of the lower end of the coil plastic coating 2.

[0024] The mounting fixing plate 7 is press-fitted on the outside of the hydrogen injector main body 6 through the hydrogen injector main body mounting hole.

[0025] An annular coil plastic coating protrusion 2.1 is provided on the upper end surface of the coil plastic coating 2, and an annular locking nut protrusion 1.1 is provided on the lower end surface of the locking nut 1. The locking nut protrusion 1.1 is located inside the coil plastic coating protrusion 2.1, and the first O-ring 8.1 is restricted between the locking nut protrusion 1.1 and the coil plastic coating protrusion 2.1.

[0026] The inner circle 2.2 of the lower end of the coil plastic coating 2 is conical, and the small end of the inner circle 2.2 of the lower end of the coil plastic coating 2 faces upward and the large end faces downward.

[0027] The working principle of the present utility model is as follows:

[0028] The mounting fixing plate 7 is press-fitted through the hydrogen injector body mounting hole on the outside of the hydrogen injector body 6 to form an integral body. The coil component is composed of a coil plastic coating 2, a coil skeleton 3, a magnetic conductive housing 4 and an enameled wire winding 5. The coil component is locked and fixed by a locking nut 1. The first O-ring 8.1 contacts the lower end surface of the locking nut 1 and the upper end surface of the coil plastic coating 2 to generate rubber compression, forming a seal to prevent external water vapor from entering the enameled wire winding 5 between the locking nut 1 and the coil plastic coating 2. The second O-ring 8.2 contacts the upper surface of the mounting fixing plate 7, the outer circle of the hydrogen injector body 6 and the inner circle 2.2 of the lower end part of the coil plastic coating 2 to generate rubber compression, forming a seal to prevent external water vapor from entering the enameled wire winding 5 between the coil plastic coating 2 and the hydrogen injector body 6. Thus, the locking nut 1, the coil plastic coating 2, the hydrogen injector body 6, the first O-ring 8.1 and the second O-ring 8.2 jointly form a sealed protection cavity to protect the enameled wire winding 5 of the coil.

[0029] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solutions of the present utility model and not to limit them. Although the present utility model has been described in detail with reference to the examples, those of ordinary skill in the art should understand that the technical solutions of the present utility model can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present utility model, and they should all be covered within the scope of the claims of the present utility model.

Claims

1. A hydrogen injector coil component protection structure, characterized by: It comprises a locking nut (1), a coil plastic coating (2), a coil frame (3), a magnetic conductive shell (4), an enameled wire winding (5), a hydrogen injector body (6), a mounting fixing plate (7), a first O-ring (8.1) and a second O-ring (8.2); A hydrogen injector body mounting hole is provided on the mounting fixing plate (7), the mounting fixing plate (7) is fixed to the outside of the hydrogen injector body (6) through the hydrogen injector body mounting hole, the coil frame (3) is sleeved on the outside of the hydrogen injector body (6), the enameled wire winding (5) is mounted on the coil frame (3), the magnetic conductive shell (4) is sleeved on the outside of the coil frame (3), and the coil plastic (2) is sleeved on the outside of the magnetic conductive shell (4); A locking nut (1) is fixed to the upper end of the hydrogen injector body (6), and the first O-ring (8.1) is installed between the locking nut (1) and the coil plastic package (2), and the first O-ring (8.1) is in contact with the lower end surface of the locking nut (1) and the upper end surface of the coil plastic package (2); The second O-ring (8.2) is installed between the mounting plate (7), the hydrogen injector body (6) and the coil overmolding (2), and the second O-ring (8.2) is in contact with the upper surface of the mounting plate (7), the outer circle of the hydrogen injector body (6) and the inner circle (2.2) of the lower end of the coil overmolding (2).

2. The hydrogen injector coil component protection structure according to claim 1, characterized in that: The mounting fixing plate (7) is interference-fitted on the outside of the hydrogen injector body (6) through the mounting hole of the hydrogen injector body.

3. The hydrogen injector coil component protection structure according to claim 1, characterized in that: The upper end surface of the coil plastic coating (2) is provided with an annular coil plastic coating protrusion (2.1), and the lower end surface of the locking nut (1) is provided with an annular locking nut protrusion (1.1), the locking nut protrusion (1.1) is located on the inner side of the coil plastic coating protrusion (2.1), and the first O-ring (8.1) is confined between the locking nut protrusion (1.1) and the coil plastic coating protrusion (2.1).

4. The hydrogen injector coil component protection structure according to claim 1, characterized in that: The inner circle (2.2) of the lower end of the coil plastic coating (2) is conical, and the small end of the inner circle (2.2) of the lower end of the coil plastic coating (2) faces upwards and the large end faces downwards.

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