Internal combustion engine cylinder thermoelectrochemical oxidation device based on a porous electrode

Abstract

The internal combustion engine cylinder thermoelectrochemical oxidation device based on porous electrodes includes a fixture for sealing the internal combustion engine cylinder and a hollow electrode, the fixture having an electrolyte outlet, the hollow electrode being inserted into the internal combustion engine cylinder, the upper end of the hollow electrode being an electrolyte inlet, and the lower portion of the hollow electrode having a plurality of downwardly inclined water outlet holes. The internal combustion engine cylinder thermoelectrochemical oxidation device based on porous electrodes of the present invention delivers electrolyte to the bottom of the cylinder through the inclined water outlet holes, so that the inner surface of the bottom of the cylinder can be fully oxidized and heat dissipated; due to the adjustment of the position of the water outlet holes on the hollow electrode, the distance between the lower end of the hollow electrode and the lower end of the cylinder is greatly shortened, so that the lower end of the internal combustion engine cylinder near the bottom dead center can be fully oxidized; when used in conjunction with an insulating sealing plug, the distance between the lower end of the hollow electrode and the lower end of the cylinder can be further shortened, and the inner wall of the internal combustion engine cylinder can be fully oxidized by water inletting from the upper end.

Description

Technical Field

[0001] The present invention relates to the technical field of thermoelectrochemical oxidation, and in particular to a thermoelectrochemical oxidation device for an internal combustion engine cylinder based on porous electrodes. Background Art

[0002] When surface treating the inner surface of an internal combustion engine cylinder, a common method is to use the inner surface of the cylinder as the anode and then embed an electrode inside the cylinder as the cathode. Chinese invention patent CN2021115034941 discloses a thermoelectrochemical oxidation fixture that seals both ends of the cylinder, embeds a hollow electrode that extends through the cylinder, and then injects an electrolyte into the cylinder to achieve thermoelectrochemical oxidation treatment of the surface. Some internal combustion engine cylinders have complex structures, such as those with a crankcase bearing journal structure at the bottom. This makes sealing the lower end of the cylinder difficult, and it is also difficult to arrange water inlet and outlet pipes at the lower end. Therefore, the fixture disclosed in patent CN2021115034941 cannot be used for surface treatment. Chinese invention patent CN2021115034015 discloses an electrode assembly that extends into the cylinder through a hollow electrode. The hollow electrode serves as both the cathode and the electrolyte inlet and outlet pipes, solving the technical problem of only being able to arrange water inlet and outlet pipes at one end of the cylinder. However, the lower end of the hollow electrode in patent CN2021115034015 is used as the inlet / outlet of the electrolyte, so the lower end of the hollow electrode must maintain a large distance from the lower end of the cylinder. This distance is much larger than the distance between the piston dead point and the end of the cylinder. This results in a section of the inner surface of the cylinder between the lower end of the hollow electrode and the lower end of the cylinder that is always insufficiently oxidized. Summary of the Invention

[0003] The object of the present invention is to provide an internal combustion engine cylinder thermoelectrochemical oxidation device based on porous electrodes to solve the problems existing in the prior art.

[0004] In order to achieve the above-mentioned purpose of the invention, the technical solution of the present invention is as follows:

[0005] The internal combustion engine cylinder thermoelectrochemical oxidation device based on porous electrodes includes a fixture for sealing the internal combustion engine cylinder and a hollow electrode. The fixture has an electrolyte outlet. The hollow electrode is inserted into the internal combustion engine cylinder. The upper end of the hollow electrode is the electrolyte inlet, and the lower part of the hollow electrode has a plurality of downward-inclined water outlet holes.

[0006] Furthermore, the lower end of the water outlet is directed toward the lower end of the cylinder of the internal combustion engine.

[0007] Furthermore, the angle between the water outlet and the axis of the hollow electrode is 30° to 70°.

[0008] Furthermore, the angle between the water outlet and the axis of the hollow electrode is 45° to 60°.

[0009] Furthermore, the lower end of the hollow electrode is closed.

[0010] Furthermore, the lower end of the hollow electrode is open, and the lower end opening of the hollow electrode is provided with an insulating plug.

[0011] Furthermore, the insulating plug has a cylindrical plug portion and a thin sheet-shaped skirt portion, the plug portion is inserted into the lower end of the hollow electrode, and the skirt portion is located between the bottom dead center of the internal combustion engine cylinder and the lower end of the internal combustion engine cylinder.

[0012] Furthermore, the insulating plug has a cylindrical plug portion and a thin sheet-shaped skirt portion, the plug portion is inserted into the lower end of the hollow electrode, and the lower end of the internal combustion engine cylinder supports the skirt portion.

[0013] Furthermore, the water outlets are located on the same horizontal plane.

[0014] Furthermore, the number of the water outlet holes is 4 to 8.

[0015] Compared with the prior art, the present invention has the following beneficial technical effects:

[0016] The present invention provides a thermoelectrochemical oxidation device for an internal combustion engine cylinder based on a porous electrode, which delivers electrolyte into the cylinder through an inclined water outlet at the lower end of a built-in hollow electrode; delivers electrolyte to the bottom of the cylinder through the inclined water outlet, so that the inner surface of the bottom of the cylinder can be fully oxidized and dissipated; due to the adjustment of the position of the water outlet on the hollow electrode, the distance between the lower end of the hollow electrode and the lower end of the cylinder is greatly shortened, so that the lower end of the internal combustion engine cylinder can be fully oxidized near the bottom dead center; when used in conjunction with an insulating sealing plug, the distance between the lower end of the hollow electrode and the lower end of the cylinder can be further shortened, and full oxidation of the inner wall of the internal combustion engine cylinder can be achieved by water intake at one end. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a cross-sectional view of an internal combustion engine cylinder thermoelectrochemical oxidation device based on porous electrodes in Example 1 of the present invention;

[0018] Figure 2 is a cross-sectional view of an internal combustion engine cylinder thermoelectrochemical oxidation device based on porous electrodes in Example 2 of the present invention;

[0019] Figure 3 It is a cross-sectional view of an internal combustion engine cylinder thermoelectrochemical oxidation device based on porous electrodes in Example 3 of the present invention. DETAILED DESCRIPTION

[0020] Example 1

[0021] like Figure 1As shown, a porous electrode-based internal combustion engine cylinder thermoelectrochemical oxidation device is shown. The internal combustion engine cylinder 2 is the workpiece to be treated, and it has a blind hole structure with an open top. The device of this embodiment includes a fixture (the fixture, electrolyte path, power supply, power connection method, electrolyte, and electrolyte circulation and circulation method of the internal combustion engine cylinder surface treatment device of this embodiment are prior art. For details, please refer to Chinese invention patents CN2021115034015 and CN2021115034941 for details, and will not be repeated here) and a hollow electrode 1. The fixture has an electrolyte outlet. The hollow electrode 1 is inserted into the internal combustion engine cylinder 2. The upper end of the hollow electrode 1 is open and the lower end is closed. The upper end of the hollow electrode 1 serves as the electrolyte inlet, and the lower portion of the hollow electrode has four downwardly inclined water outlets 3. The water outlets 3 face downward toward the lower end of the internal combustion engine cylinder 2. The angle between the water outlets 3 and the axis of the hollow electrode is 45°.

[0022] When the inner wall of the internal combustion engine cylinder 2 is subjected to thermal electrochemical oxidation treatment, the electrolyte flows in from the upper end of the hollow electrode 1, enters the internal combustion engine cylinder 2 through the water outlet 3, and then flows out from the electrolyte outlet on the upper fixture of the internal combustion engine cylinder 2.

[0023] Example 2

[0024] like Figure 2 As shown, this embodiment differs from Example 1 in that the hollow electrode 1 is open at both ends. The upper end of the hollow electrode 1 serves as the electrolyte inlet, and the lower end of the hollow electrode 1 is provided with an insulating plug 4. The insulating plug 4 comprises a cylindrical plug portion and a thin sheet-like skirt portion. The plug portion is inserted into the lower end of the hollow electrode 1, and the skirt portion is located between the bottom dead center of the internal combustion engine cylinder and the lower end of the internal combustion engine cylinder. The insulating plug 4 isolates the hollow electrode 1 from the internal combustion engine cylinder, further reducing the vertical distance between the lower end of the hollow electrode 1 and the lower end of the internal combustion engine cylinder 2.

[0025] Example 3

[0026] like Figure 3 As shown, this embodiment differs from Example 2 in that the internal combustion engine cylinder 2 is open at both ends, and the plug portion of the insulating plug 4 is inserted into the lower end of the hollow electrode 1. The lower end of the internal combustion engine cylinder 2 then presses against the skirt portion of the insulating plug 4. The internal combustion engine cylinder 2 cooperates with the clamp at the lower end to tighten the skirt portion, which provides both insulation and sealing. The device of this embodiment is suitable for cylinders with open ends but complex structures at the lower end that make it difficult to install electrolyte pipelines. Therefore, by providing an electrolyte inlet and outlet at the upper end of the cylinder, full oxidation of the inner wall of the internal combustion engine cylinder can be achieved.

Claims

1. A porous electrode-based internal combustion engine cylinder thermoelectrochemical oxidation device, comprising a fixture for sealing the internal combustion engine cylinder and a hollow electrode, wherein the fixture has an electrolyte outlet and the hollow electrode is inserted into the internal combustion engine cylinder, characterized in that: The upper end of the hollow electrode is the electrolyte inlet, and the lower part of the hollow electrode has several downward-inclined water outlets. The lower ends of the water outlets face the lower end of the internal combustion engine cylinder. The water outlets are located on the same horizontal plane, and the number of water outlets is 4 to 8.

2. The internal combustion engine cylinder thermoelectrochemical oxidation device based on porous electrodes according to claim 1, characterized in that: The angle between the water outlet and the axis of the hollow electrode is 30° to 70°.

3. The internal combustion engine cylinder thermoelectrochemical oxidation device based on porous electrodes according to claim 2, characterized in that: The angle between the water outlet and the axis of the hollow electrode is 45° to 60°.

4. The internal combustion engine cylinder thermoelectrochemical oxidation device based on porous electrodes according to claim 1, characterized in that: The lower end of the hollow electrode is closed.

5. The internal combustion engine cylinder thermoelectrochemical oxidation device based on porous electrodes according to claim 1, characterized in that: The lower end of the hollow electrode is open, and the lower end opening of the hollow electrode is provided with an insulating plug.

6. The internal combustion engine cylinder thermoelectrochemical oxidation device based on porous electrodes according to claim 5, characterized in that: The insulating plug has a cylindrical plug portion and a thin sheet-shaped skirt portion, the plug portion is inserted into the lower end of the hollow electrode, and the skirt portion is located between the bottom dead center of the internal combustion engine cylinder and the lower end of the internal combustion engine cylinder.

7. The internal combustion engine cylinder thermoelectrochemical oxidation device based on porous electrodes according to claim 5, characterized in that: The insulating plug comprises a cylindrical plug portion and a sheet-like skirt portion, the plug portion is inserted into the lower end of the hollow electrode, and the lower end of the internal combustion engine cylinder supports the skirt portion.

Images