CN212238681U

CN212238681U - Device for repairing sealing performance of copper sleeve of oil sprayer

Info

Publication number: CN212238681U
Application number: CN202020310607.0U
Authority: CN
Inventors: 程烨; 朱辉
Original assignee: FAW Jiefang Automotive Co Ltd
Current assignee: FAW Jiefang Automotive Co Ltd
Priority date: 2020-03-13
Filing date: 2020-03-13
Publication date: 2020-12-29
Anticipated expiration: 2030-03-13

Abstract

A device for repairing the sealing performance of a copper sleeve of a fuel injector is characterized in that: the fuel injector comprises an expansion rod and a guide knocking rod, wherein a guide boss is designed at the upper end of the expansion rod, a section of cone is arranged at the lower end of the expansion rod and is matched with a fuel injector copper sleeve, and a groove matched with the guide boss at the upper end of the expansion rod is designed on the guide knocking rod. The utility model discloses have and need not to change the sprayer copper sheathing, it is simple and efficient to operate, reduces the repair cost. The remanufacturing or maintenance cost of the internal combustion engine is reduced, and the repairing effect is good. The utility model discloses well direction design, the recess design on the pole is beaten to the pole upper end direction boss that rises, ensures that the frock can play the guide effect and guarantee that the atress is even at the during operation. The utility model discloses can also be applied to application scenes such as maintenance, service.

Description

Device for repairing sealing performance of copper sleeve of oil sprayer

Technical Field

The utility model relates to a be applied to internal-combustion engine refabrication or maintenance process and carry out prosthetic technical field, concretely relates to prosthetic device of sprayer copper sheathing leakproofness to cylinder head sprayer copper sheathing.

Background

In the remanufacturing or maintenance process of the internal combustion engine, a water pressure test needs to be carried out on a used cylinder head assembly to verify the air tightness of the cylinder head assembly, so that the remanufacturing or the reusing of the cylinder head assembly is the first condition. In a pressurized-water test of a cylinder head assembly, the situation of water leakage caused by local out-of-round of a copper sleeve of an oil sprayer in the cylinder head assembly is often found, and the problem needs to be solved by replacing the copper sleeve of the oil sprayer under normal conditions. When the copper sleeve of the oil injector is replaced, a special oil injector copper sleeve pulling-out tool and a special oil injector copper sleeve pressing-in tool are needed, the technological process is complex, and the operation is troublesome; meanwhile, the cost is increased due to the replacement of the copper bush of the oil injector in the remanufacturing and repairing process. Therefore, the tool capable of quickly repairing the out-of-round oil injector copper bush on line needs to be invented, so that the process of replacing the oil injector copper bush is reduced, and the remanufacturing and repairing cost of the cylinder cover assembly is reduced. The utility model discloses reached the cylinder head assembly and can reuse, reduced the change sprayer copper sheathing process, reduced the cost of cylinder head refabrication.

SUMMERY OF THE UTILITY MODEL

The utility model particularly relates to a prosthetic device of sprayer copper sheathing leakproofness is according to the structure of cylinder head sprayer copper sheathing and the form of arranging to and in cylinder head assembly pressurized-water test many times, sprayer copper sheathing out of round position and characteristic, and copper itself have good ductility, the utility model discloses the technical scheme of specific structure as follows:

a device for repairing the sealing performance of a copper sleeve of a fuel injector is characterized in that: the oil sprayer comprises an expansion rod and a guide knocking rod, wherein a guide boss is designed at the upper end of the expansion rod, a section of cone is arranged at the lower end of the expansion rod and is matched with a copper sleeve of an oil sprayer, and a groove matched with the guide boss at the upper end of the expansion rod is designed on the guide knocking rod.

The utility model discloses have and need not to change the sprayer copper sheathing, it is simple and efficient to operate, reduces the repair cost. The remanufacturing or maintenance cost of the internal combustion engine is reduced, and the repairing effect is good. The utility model discloses well direction design, the recess design on the pole is beaten to the pole upper end direction boss that rises, ensures that the frock can play the guide effect and guarantee that the atress is even at the during operation. The utility model discloses can also be applied to application scenes such as maintenance, service.

Drawings

Fig. 1 is a schematic view of the expansion rod structure of the present invention.

Fig. 2 is a schematic view of the structure of the guide rapping bar.

Fig. 3 is a schematic view of the working state structure of the present invention.

Detailed Description

The following detailed description of the embodiments of the present invention refers to the accompanying drawings.

The described embodiments are only some, but not all embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

A device for repairing the sealing performance of a copper sleeve of a fuel injector is characterized in that: the oil sprayer comprises an expansion rod 4 and a guide knocking rod 5, wherein a guide boss is designed at the upper end of the expansion rod 4, a section of cone is arranged at the lower end of the expansion rod 4, the cone is matched with a copper sleeve of an oil sprayer, and a groove matched with the guide boss at the upper end of the expansion rod 4 is designed on the guide knocking rod 5.

The length of the conical surface of the cone at the lower end of the expansion rod 4 is 15-19 mm, and the taper range of the expansion rod is 12-16 degrees.

According to figure 1 to figure 3 in original cylinder head assembly 1 restoration, through 1 pressurized-water test of cylinder head assembly, discovery sprayer copper sheathing 2 department has the condition of leaking, through the utility model discloses can realize restoring sprayer copper sheathing 2 out of round on line, this process only needs one set the utility model discloses a frock can realize, can carry out the on-line operation at cylinder head assembly 1, need not to change the sprayer copper sheathing, and is easy and simple to handle swift, reduces the restoration cost.

Detecting the air tightness of the cylinder cover assembly 1 when the cylinder cover assembly 1 is subjected to a water-pressurizing test; when detecting the air tightness of the cylinder cover assembly 1, observing whether the cylinder cover assembly 1 has air leakage, and judging that the air tightness of the cylinder cover assembly 1 is unqualified if the air leakage exists; continuing to perform a water pressing test on the cylinder cover assembly 1, observing a gas leakage part, and if the gas leakage part is positioned at the oil injector copper sleeve 2, judging that the oil injector copper sleeve 2 is out of round and cannot be tightly attached to the sealing ring 3, and repairing the oil injector copper sleeve 2 if a gap exists; utilize the utility model discloses restore sprayer copper sheathing 2.

The method comprises the steps of vertically placing an expansion rod 4 into an upper hole of a fuel injector copper bush 2 to be repaired, ensuring that the center of the expansion rod 4 coincides with the center of the fuel injector copper bush 2 when the expansion rod 4 is placed, installing a guide knocking rod 5 above the expansion rod 4, enabling a groove of the guide knocking rod 5 to be aligned with a boss on the expansion rod 4 when the expansion rod 4 is installed, enabling the expansion rod 4 to be perpendicular to the upper hole of the fuel injector copper bush 2 to be repaired, knocking the guide knocking rod 5 by a hammer to enable the guide knocking rod 5 to vertically move downwards along a central line to drive the expansion rod 4 to move downwards, enabling the expansion rod 4 to move downwards along the inner wall of the fuel injector copper bush 2 after being stressed, expanding the out-of-round fuel injector copper bush 2 by using the taper of the lower portion of the expansion rod 4 to enable the outer wall of the fuel injector copper bush 2 to be tightly attached to a sealing ring 3, enabling the conical surface of the expansion rod 4 not to move downwards to a. At the moment, the oil injector copper bush 2 and the sealing ring 3 in the cylinder cover assembly 1 form a complete and closed water cavity, and the air tightness is improved. And carrying out a water-pressing test on the cylinder cover assembly 1 after the oil sprayer copper sleeve 2 is repaired, detecting the air tightness of the cylinder cover assembly 1, and verifying the roundness repairing effect of the oil sprayer copper sleeve 2.

Claims

1. A device for repairing the sealing performance of a copper sleeve of a fuel injector is characterized in that: the oil sprayer comprises an expansion rod (4) and a guide knocking rod (5), wherein a guide boss is designed at the upper end of the expansion rod (4), a section of cone is arranged at the lower end of the expansion rod (4), the cone is matched with a copper sleeve of an oil sprayer, and a groove matched with the guide boss at the upper end of the expansion rod (4) is designed on the guide knocking rod (5).

2. The device for repairing the sealability of the copper sleeve of the oil sprayer according to claim 1 is characterized in that: the length of the conical surface of the cone at the lower end of the expansion rod (4) is 15-19 mm, and the taper range of the expansion rod is 12-16 degrees.