Oil outlet sealing structure of metering valve and oil sprayer

Abstract

The utility model discloses an oil outlet hole sealing structure of a metering valve and an oil sprayer, and relates to the technical field of oil sprayers, the oil outlet hole sealing structure is characterized in that the top end of an oil outlet hole is provided with a plane area used for sealing, and the annular side of the oil outlet hole is provided with a gathering area; the cavitation erosion risk is reduced, and impurities generated by cavitation erosion can be collected.

Description

Technical Field

[0001] The utility model relates to the technical field of fuel injectors, in particular to an oil outlet sealing structure of a metering valve and a fuel injector. Background Art

[0002] In the prior art, to achieve ball valve sealing, an angled structure matching the ball valve is installed on the end face from the high-pressure oil unloading hole to the metering valve. Repeated lifting of the armature and the impact of the high-pressure jet can easily cause cavitation damage to the angled direction and the ball valve. Cavitation occurs because the interface between the cavitation vapor phase and the liquid phase within the channel (the high-pressure oil unloading hole) undergoes rapid and continuous phase change and mass exchange, resulting in the condensation and collapse of a large number of tiny cavitation bubbles. The resulting impact force acts on the wall surface. As a result, existing metering valves for injectors often experience impurity accumulation and carbon deposits around the sealing surface after long-term use. This can easily clog or wear the oil outlet, leading to reduced injection performance and even malfunctions. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model provides an oil outlet sealing structure for a metering valve, which reduces the risk of cavitation and can collect impurities generated by cavitation.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A sealing structure for an oil outlet hole of a metering valve comprises: a plane area for sealing is arranged at the top of the oil outlet hole, and a gathering area is arranged on the annular side of the oil outlet hole.

[0006] Compared with the prior art, the present invention has the following beneficial effects:

[0007] This sealing structure utilizes a flat surface area and the corresponding bottom end of the valve body to achieve a flat seal, eliminating the need for an angled design at the top of the metering valve and reducing the risk of cavitation. Furthermore, a collection area is designed around the oil outlet to collect sediment and facilitate cleaning, while also preventing sediment from falling into the outlet, potentially causing blockage and wear.

[0008] As a preferred solution, a groove is provided on the top of the metering valve, a protrusion is provided in the groove, the oil outlet is located on the protrusion, and the top surface of the protrusion is a plane area for sealing.

[0009] As a preferred solution, the groove and the protrusion are both configured in an annular shape, and the protrusion is provided with a downwardly concave oil drainage groove to form an accumulation area.

[0010] As a preferred solution, a plurality of oil drain grooves are provided and distributed around the oil outlet hole.

[0011] As a preferred solution, the gathering area extends in a spoke shape.

[0012] As a preferred solution, the longitudinal section of the oil drain groove is "U" and / or "V" shaped.

[0013] As a preferred solution, the depth of the oil drain groove is 0.1 mm to 2 mm.

[0014] As a preferred solution, the protrusion is in a cross shape, and the oil outlet is located at the center of the protrusion.

[0015] The utility model also provides a fuel injector, which reduces the risk of cavitation and can collect impurities generated by cavitation, thereby avoiding blockage and wear and ensuring normal operation of the fuel injector.

[0016] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0017] A fuel injector comprises the oil outlet sealing structure of the metering valve described in any one of the above items.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The injector's seal structure utilizes a flat surface area and the corresponding bottom end of the valve body to achieve a flat seal, eliminating the need for an angled design at the top of the metering valve and reducing the risk of cavitation. Furthermore, a collection area is designed around the oil outlet to collect sediment and facilitate cleaning, preventing it from falling into the outlet and causing clogging and wear. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic structural diagram of a sealing structure in one embodiment;

[0021] Figure 2 This is a schematic structural diagram of a sealing structure in another embodiment;

[0022] Figure 3 Schematic diagram of the sealing structure in another embodiment.

[0023] In the above drawings:

[0024] 1. Metering valve; 2. Oil outlet hole; 3. Flat area; 4. Accumulation area; 5. Groove; 6. Protrusion. DETAILED DESCRIPTION

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; the structures described in various embodiments can be freely combined without any conflict in structure or principle.

[0026] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium, internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0027] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is typically placed when in use. These terms are intended solely to facilitate the description of this utility model and simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc., etc., are used solely for distinction and description, and should not be construed as indicating or implying relative importance.

[0028] Below with reference to accompanying drawing some embodiment of the present invention is described:

[0029] like Figures 1 to 3 As shown, the utility model proposes an oil outlet sealing structure of a metering valve, which mainly improves the seal between the top of the metering valve 1 and the bottom end of the valve body (not shown in the figure, in practice the valve body is mainly an electromagnetically driven valve stem, etc.), and the sealing structure includes: a flat area 3 for sealing is arranged at the top of the oil outlet 2, and a gathering area 4 is arranged on the ring side of the oil outlet 2.

[0030] This sealing structure utilizes the flat surface area 3 and the corresponding bottom end of the valve body to achieve a flat seal, eliminating the need for an angled design at the top of the metering valve 1 and reducing the risk of cavitation. Furthermore, a collection area 4 is designed around the oil outlet 2 to collect sediment and facilitate cleaning, while also preventing sediment from falling into the oil outlet 2 and causing blockage and wear.

[0031] As a preferred solution, Figure 1As shown, the top of the metering valve 1 is provided with a groove 5, within which is a protrusion 6. Both the groove 5 and the protrusion 6 are annular in shape. The oil outlet 2 is located in the middle of the protrusion 6, and the top surface of the protrusion 6 forms a flat sealing area 3. This seals the oil outlet 2 when the bottom end of the valve body contacts the flat area 3. When the bottom end of the valve body disengages the flat area 3, fuel is ejected from the oil outlet 2 into the groove 5, draining the fuel and reducing cavitation. Furthermore, using the top of the protrusion 6 as the sealing flat area 3 reduces the required finishing area, facilitating manufacturing and reducing costs.

[0032] As a preferred solution, Figure 1 As shown, a downwardly recessed oil drain groove is provided on the protrusion 6 to form a collection area 4. For example, multiple oil drain grooves are provided and distributed around the oil outlet 2. The shape of the oil drain groove increases the area for sediment accumulation and allows sediment to be collected in the drain groove for easy cleaning.

[0033] As a preferred solution, Figure 3 As shown, the collecting area 4 is designed to extend in a spoke shape.

[0034] As a preferred solution, for ease of understanding, a plane parallel to the axial direction of the metering valve 1 is defined as a longitudinal section. The longitudinal section of the oil drain groove can be designed as a "U" and / or "V" shape to expand the accumulation area of ​​sediment and enhance the sediment collection effect.

[0035] As a preferred solution, the depth of the oil drain groove is designed to be 0.1 mm to 2 mm.

[0036] As a preferred solution, Figure 2 As shown, the protrusion 6 is designed to be cross-shaped, and the oil outlet 2 is located in the center of the protrusion 6. In this way, the small-area protrusion 6 and other connected surfaces are formed into a stepped shape to increase the oil unloading groove area.

[0037] The utility model also provides a fuel injector, comprising any one of the above-mentioned oil outlet sealing structures of the metering valve.

[0038] The injector's sealing structure utilizes the flat surface area 3 and the corresponding bottom end of the valve body to achieve a flat seal, eliminating the need for an angled design at the top of the metering valve 1 and reducing the risk of cavitation. Furthermore, a collection area 4 is designed around the oil outlet 2 to collect sediment and facilitate cleaning. This area also prevents sediment from falling into the oil outlet 2, potentially causing blockage and wear.

Claims

1. A sealing structure for an oil outlet of a metering valve, characterized in that: include: The top end of the oil outlet hole (2) is provided with a plane area (3) for sealing, and the annular side of the oil outlet hole (2) is provided with a gathering area (4).

2. The oil outlet sealing structure of a metering valve according to claim 1, characterized in that: A groove (5) is provided on the top of the metering valve (1), a protrusion (6) is provided in the groove (5), the oil outlet hole (2) is located on the protrusion (6), and the top surface of the protrusion (6) is a plane area (3) for sealing.

3. The oil outlet sealing structure of a metering valve according to claim 2, characterized in that: The groove (5) and the protrusion (6) are both configured in an annular shape, and the protrusion (6) is provided with a downwardly concave oil drain groove to form an accumulation area (4).

4. The oil outlet sealing structure of a metering valve according to claim 3, characterized in that: The oil drain grooves are provided in plurality and are distributed on the annular side of the oil outlet hole (2).

5. The oil outlet sealing structure of a metering valve according to claim 2, characterized in that: The gathering area (4) extends in a spoke shape.

6. The oil outlet sealing structure of a metering valve according to claim 3 or 4, characterized in that: The longitudinal section of the oil drain groove is "U" and / or "V" shaped.

7. The oil outlet sealing structure of a metering valve according to claim 6, characterized in that: The depth of the oil drain groove is 0.1 mm to 2 mm.

8. The oil outlet sealing structure of a metering valve according to claim 2, characterized in that: The protrusion (6) is in a cross shape, and the oil outlet hole (2) is located at the center of the protrusion (6).

9. A fuel injector, characterized in that: The invention comprises an oil outlet sealing structure of a metering valve according to any one of claims 1 to 8.

Images