A two-stroke heavy oil air entraining direct injection engine compressor connecting rod bearing press fitting tool

Abstract

The utility model provides a two -stroke heavy oil gas direct injection engine compressor connecting rod bearing pressure equipment tool, its characterized in that includes: support seat, pressure equipment axle. Support seat structure mainly has the avoidance mouth, pressure equipment axle guide hole, bearing avoidance hole, compressor connecting rod avoidance hole, the pressure equipment axle structure mainly has the guide shaft, bearing positioning axle, pressure equipment face. Support seat and pressure equipment axle cooperate and under the pressure action of hydraulic machine will compressor connecting rod bearing accurate pressure equipment to compressor connecting rod bearing hole. This two -stroke heavy oil engine output connecting axle installation tool has simple structure, convenient operation, convenient dismounting, low manufacturing cost and so on advantages.

Description

Technical Field

[0001] This utility model belongs to the field of assembly technology of small two-stroke heavy oil direct injection engine, specifically referring to a press-fit tool for the compressor connecting rod bearing of a two-stroke heavy oil direct injection engine. Background Technology

[0002] Compressor connecting rod bearing assembly is a crucial step in the assembly of two-stroke heavy-oil direct injection engines. Its installation employs a cryogenic assembly method, where the compressor connecting rod bearing is cooled in liquid nitrogen before being installed into the corresponding bearing bore. This method places high demands on equipment, requiring specialized cryogenic equipment (liquid nitrogen tank) to cool the compressor connecting rod bearing before installation. Cooling the compressor connecting rod bearing takes ten minutes, and the rewarming process is slow, resulting in low assembly efficiency. Improper handling of the liquid nitrogen tank can also lead to frostbite or suffocation risks. Mechanical press-fitting is a common method for bearing assembly, using a hydraulic press or specialized tooling to press the bearing into the bearing bore. In specific scenarios, mechanical press-fitting demonstrates superior efficiency, cost, and applicability. Therefore, developing specialized tooling for mechanical press-fitting of compressor connecting rod bearings is imperative. Utility Model Content

[0003] The purpose of this utility model is to provide a press-fitting tool for compressor connecting rod bearings of two-stroke heavy oil direct injection engines that is simple in structure, easy to operate, convenient to disassemble, low in manufacturing cost, and can improve the assembly efficiency of compressor connecting rod bearings when used with a hydraulic press, thus solving the problems of high equipment cost and low assembly efficiency encountered when using the low temperature assembly method to assemble compressor connecting rod bearings.

[0004] The main components of the press-fit tool for the compressor connecting rod bearing of the two-stroke heavy oil direct injection engine include a support base and a press-fit shaft. The support base supports and limits the compressor connecting rod and guides the press-fit shaft. The press-fit shaft limits the compressor connecting rod bearing and, under the guidance of the support base, aligns the compressor connecting rod bearing with the compressor connecting rod bearing hole.

[0005] Preferably, the support base is structurally designed with compressor connecting rod clearance holes, bearing clearance holes, and press-fit shaft guide holes; the diameter of the compressor connecting rod clearance holes is set according to the outer contour diameter of the big end of the compressor connecting rod to ensure that the compressor connecting rod clearance holes effectively position the compressor connecting rod.

[0006] Preferably, the depth of the bearing clearance hole is set according to the assembly relationship (A) between the compressor connecting rod bearing and the compressor connecting rod to ensure that the press-fitting of the compressor connecting rod bearing meets the assembly requirements.

[0007] Preferably, the diameter of the guide hole for the press-fit shaft is set according to the size of the guide shaft of the press-fit shaft to ensure that it plays a guiding role for the press-fit shaft during press-fitting.

[0008] Preferably, the press-fitting shaft is structurally designed with a bearing positioning shaft, a guide shaft, and a press-fitting surface; the diameter of the bearing positioning shaft is set according to the size of the inner hole of the compressor connecting rod bearing, and its axis is coaxial with the axis of the guide shaft, so that the bearing positioning shaft can position the compressor connecting rod bearing while ensuring that the compressor connecting rod bearing and the compressor connecting rod bearing hole are coaxially press-fitted.

[0009] Preferably, the pressing surface contacts the end face of the compressor connecting rod bearing to prevent damage caused by direct contact between the hydraulic press head and the end face of the compressor connecting rod bearing.

[0010] Beneficial effects

[0011] This utility model has a reasonable structural design, and its beneficial effects are that it can quickly and effectively install compressor connecting rod bearings. It has a simple structure, is easy to operate, and has low manufacturing cost, which greatly improves the installation speed of compressor connecting rod bearings and effectively solves the problems of high equipment cost and low assembly efficiency encountered when using the low temperature assembly method to assemble compressor connecting rod bearings. Attached Figure Description

[0012] Figure 1 This is an exploded view of the structure of this utility model;

[0013] Figure 2 This is a cross-sectional view of the structure of this utility model;

[0014] Figure 3 This is a schematic diagram of the support structure;

[0015] Figure 4 This is a schematic diagram of the press-fit shaft structure;

[0016] Figure 5 This is an assembly diagram showing the relationship between the compressor connecting rod bearing and the compressor connecting rod.

[0017] In the picture:

[0018] 1-Support base; 11-Clearing opening; 12-Pressure fitting shaft guide hole; 13-Bearing clearance hole;

[0019] 14- Compressor connecting rod clearance hole; 2- Compressor connecting rod; 3- Compressor connecting rod bearing;

[0020] 4-Pressure fitting shaft; 41-Guide shaft; 42-Bearing positioning shaft; 43-Pressure fitting surface; Detailed Implementation

[0021] The specific embodiments of this utility model are further described in detail below with reference to the accompanying drawings.

[0022] like Figures 1-5As shown, a press-fit tool for the connecting rod bearing of a two-stroke heavy oil direct injection engine compressor mainly consists of a support base 1 and a press-fit shaft 4. The support base 1 mainly includes a clearance opening 11, a guide hole 12 for the press-fit shaft, a bearing clearance hole 13, and a compressor connecting rod clearance hole 14. The press-fit shaft 4 mainly includes a guide shaft 41, a bearing positioning shaft 42, and a press-fit surface 43.

[0023] like Figures 1-4 As shown, in this example, the installation steps of the compressor connecting rod bearing 3 are as follows: First, place the support base 1 stably directly below the hydraulic press head; install the compressor connecting rod 2 into the compressor connecting rod clearance hole 14 of the support base 1, with the rod body cleared through the clearance opening 11; install the compressor connecting rod bearing 3 onto the bearing positioning shaft 42 of the press shaft 4, and then install them together onto the support base 1; start the hydraulic press and perform press installation until the hydraulic press head can no longer descend, at which point the press installation of the compressor connecting rod bearing 3 is complete.

[0024] Working principle:

[0025] like Figures 1-5 As shown, compressor connecting rod 2 is installed into compressor connecting rod clearance hole 14 after passing through clearance hole 11 for positioning, ensuring that the bearing hole axis of compressor connecting rod 2 is coaxial with the axis of compressor connecting rod clearance hole 14. Compressor connecting rod bearing 3 is installed onto bearing positioning shaft 42 of press-fit shaft 4 and then together installed onto support seat 1. The guide shaft 41 of press-fit shaft 4 cooperates with press-fit shaft guide hole 12 of support seat 1, achieving the purpose of positioning press-fit shaft 4 on support seat 1, and aligning compressor connecting rod bearing 3 with the bearing hole of compressor connecting rod 2. When the hydraulic press is started for press-fitting, the end face of compressor connecting rod bearing 3 contacts the lower plane of bearing clearance hole 13 of support seat 1, preventing the hydraulic press head from continuing to descend, and the press-fitting of compressor connecting rod bearing 3 is completed.

[0026] The above embodiments are merely descriptions of preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements to the technical solutions of the present utility model without departing from the design spirit of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A press-fitting tool for the connecting rod bearing of a compressor in a two-stroke heavy oil direct injection engine, characterized in that... It mainly consists of a support base (1) and a press-fitting shaft (4). The support base (1) cooperates with the press-fitting shaft (4) and, under the pressure of the hydraulic press, precisely presses the compressor connecting rod bearing (3) into the bearing hole of the compressor connecting rod (2). The support base (1) mainly has a clearance opening (11), a press-fitting shaft guide hole (12), a bearing clearance hole (13), and a compressor connecting rod clearance hole (14). The press-fitting shaft (4) mainly has a guide shaft (41), a bearing positioning shaft (42), and a press-fitting surface (43). The compressor connecting rod clearance hole (14) positions the compressor connecting rod (2) to ensure the bearing of the compressor connecting rod (2) is properly installed. The axis of the hole is coaxial with the axis of the press-fit shaft guide hole (12); the bearing clearance hole (13) presses and limits the compressor connecting rod bearing (3) to ensure that the press-fit of the compressor connecting rod bearing (3) meets the assembly requirements; the bearing positioning shaft (42) positions the compressor connecting rod bearing (3) to ensure that the axis of the compressor connecting rod bearing (3) is coaxial with the guide shaft (41); the press-fit shaft guide hole (12) guides the guide shaft (41) to ensure that the axis of the compressor connecting rod bearing (3) is coaxial with the axis of the compressor connecting rod (2) bearing hole, further ensuring that the compressor connecting rod bearing (3) and the compressor connecting rod (2) bearing hole are press-fitted coaxially.

2. The press-fitting tool for the connecting rod bearing of a two-stroke heavy oil direct injection engine compressor according to claim 1, characterized in that... The compressor connecting rod clearance hole (14), bearing clearance hole (13), and press-fit shaft guide hole (12) of the support base (1) are on the same axis; the diameter of the compressor connecting rod clearance hole (14) is set according to the outer contour diameter of the big end of the compressor connecting rod (2) to ensure that the compressor connecting rod clearance hole (14) effectively positions the compressor connecting rod (2); the depth of the bearing clearance hole (13) is set according to the assembly relationship (A) between the compressor connecting rod bearing (3) and the compressor connecting rod (2) to ensure that the press-fit of the compressor connecting rod bearing (3) meets the assembly requirements; the diameter of the press-fit shaft guide hole (12) is set according to the size of the guide shaft (41) of the press-fit shaft (4) to ensure that it plays a guiding role for the press-fit shaft (4) during press-fitting.

3. The press-fitting tool for the connecting rod bearing of a two-stroke heavy oil direct injection engine compressor according to claim 1, characterized in that... The diameter of the bearing positioning shaft (42) of the press-fit shaft (4) is set according to the size of the inner hole of the compressor connecting rod bearing (3) and the axis is coaxial with the axis of the guide shaft (41). While the bearing positioning shaft (42) positions the compressor connecting rod bearing (3), it ensures that the compressor connecting rod bearing (3) and the bearing hole of the compressor connecting rod (2) are coaxially press-fitted.

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