CN2653153Y

CN2653153Y - Bionic scale type pressure lubrication piston

Info

Publication number: CN2653153Y
Application number: CN 02273692
Authority: CN
Inventors: 邓宝清; 任露泉; 苏岩
Original assignee: Jilin University
Current assignee: Jilin University
Priority date: 2002-06-10
Filing date: 2002-06-10
Publication date: 2004-11-03
Anticipated expiration: 2012-06-10

Abstract

The utility model relates to a bionic scale type pressure lubricating piston, which belongs to the field of mechanical power engineering and belongs to the crank connecting rod mechanism of a reciprocating piston machine. The bionic scale-type pressure lubrication piston with pressure oil supply is composed of a common piston, a scale-type slope machined on the working surface of its skirt, a pressure oil channel and a control switch. The purpose of supplying pressure oil to the working surface to achieve pressure oil film lubrication can be achieved through the design of the scale-type slope and the control switch. The bionic scale type pressure lubricating piston of the utility model has a simple structure, is easy to process, is easy to form a pressure oil film for lubrication, reduces friction and wear, improves mechanical efficiency, service life and reduces noise.

Description

Bionic scaled pressure lubricating piston

Technical field:

Bionic scaled pressure lubricating piston relates to a kind of connecting rod of reciprocating piston type machinery, belongs to machine power engineering field.

Background technique:

Piston is one of critical component of reciprocating piston type machinery.By its structure and the common structural type of working principle is to only depend on oil ring to piston skirt cloth oil, and skirt section cloth oil makes piston be in to lack inadequately fully unavoidably or do not have oil condition, has increased the tendency of wearing and tearing, makes piston become easily damaged parts.

Technology contents:

In order to solve the problems referred to above that existing piston exists, the purpose of this utility model helps reducing the bionic scaled pressure lubricating piston that fretting wear improves working life for reciprocating piston class machinery provides a kind of simple in structure, lubricated safe and reliable.

Above-mentioned purpose of the present utility model is achieved in that accompanying drawings is as follows:

Bionic scaled pressure lubricating piston comprises piston head, skirt section and piston pin hole.Control switch wrist pin 4 is housed in the piston pin hole, it and the interference of connecting rod small end hole are assembled, and two is blocked, be provided with the control through hole thereon, this control through hole communicates with connnecting rod big end pressure oil duct through wrist pin center hole, connecting rod center hole, process flake type inclined-plane 2 and pressure oil duct 3 on the both sides working surface in the skirt section of piston 1, pressure oil duct 4 communicates with control through hole on flake type inclined-plane 2 and the control switch wrist pin 4.

The utlity model has following advantage:

1, the flake type ramp structure of piston is simple, easily processing;

2, piston of the present utility model utilizes pressure oil lubricated, can improve piston lubricating condition, reduce fretting wear, improve working life;

3, piston of the present utility model can reduce the frictional loss of piston and cylinder sleeve, improves the mechanical efficiency of reciprocating piston class machinery, improves the power character of motor;

4, the piston of model utility has the effect that reduces to vibrate the reduction noise.

Description of drawings:

Fig. 1 is the sectional drawing of bionic scaled pressure lubricating piston;

Fig. 2 is the side view of Fig. 1.

Among the figure: the 1st, piston, the 2nd, flake type inclined-plane, the 3rd, pressure oil duct, the 4th, control switch wrist pin.

Embodiment:

Below in conjunction with embodiment shown in the accompanying drawing, further specify particular content of the present utility model and working principle thereof.

The bionic scaled pressure lubricating piston that the utility model provides comprises piston 1 and flake type inclined-plane 2 and pressure oil duct 3 and control switch wrist pin 4.Its working principle is control switch wrist pin 4 and connecting rod small end hole interference assembling, and two is blocked.Pressure oil enters the wrist pin center hole by connnecting rod big end through the hole that the connecting rod center processes, by the control through hole on the wrist pin, on pressure oil duct 3 is sent into flake type inclined-plane 2 on the pressure-bearing working surface, will form the pressure oil film during piston motion, realize pressure lubrication to piston.Thereby the realization film lubrication reduces fretting wear, mechanical efficiency and working life is provided.Because the existence of pressure oil film makes direct impact does not take place between piston and the cylinder sleeve, has reduced the amplitude of piston impact cylinder sleeve, thereby has played the effect of vibration and noise reducing.

Bent axle rotated and drives connecting rod swing when the control mechanism of control switch wrist pin 4 was engine operation, connecting rod drives wrist pin and back and forth rotated in certain angular range, by two oil-through holes leaving on the wrist pin select with piston on any side oil duct conducting in not, decision still is secondary thrust face fuel feeding to the main thrust face.Guaranteeing to the timely supply pressure oil of working surface, the inoperative surface not fuel feeding to reduce the leakage and the pressure release of machine oil.

The flake type inclined-plane 2 of scaled pressure lubricating piston is 1～4 conical surface ring-type chip inclined-plane.

The taper direction on the flake type inclined-plane 2 on the scaled pressure lubricating piston major-minor thrust face is opposite, every side scale area and less than this side piston bearing area 20%.

Main thrust face of piston skirt (expansion stroke load-carrying surface) and secondary thrust face are in working stroke (bearing side pressure) and inoperative stroke respectively during engine operation, design by control switch, make the flake type inclined-plane at inoperative stroke fuel feeding not, in working stroke to piston skirt supply pressure machine oil, realization is abundant to the piston skirt fuel feeding, make to be in good film lubrication state between piston skirt and cylinder sleeve, reach and reduce fretting wear and realize the wear-resisting raising purpose in working life.

Claims

1. The bionic scale-type pressure-lubricated piston includes the top of the piston, the skirt and the piston pin hole. It is characterized in that the piston pin hole is equipped with a control switch piston pin (4). There is a control through hole on it, the control through hole communicates with the pressure oil channel of the big end of the connecting rod through the central hole of the piston pin and the central hole of the connecting rod, and is processed on the working surface of both sides of the skirt of the piston (1). Scale type slope (2) and pressure oil passage (3), pressure oil passage (4) communicates with the control through hole on the scale type slope (2) and control switch piston pin (4).

2. The bionic scale-type pressure-lubricated piston according to claim 1, characterized in that said scale-type inclined surfaces (2) are 1 to 4 cone-shaped annular slice-type inclined surfaces.

3. The bionic scale-type pressure-lubricated piston according to claim 1 or 2, characterized in that the scale-like inclined surfaces (2) on the main and auxiliary thrust surfaces of the piston have opposite taper directions, and the scale area on each side is smaller than that of the piston on the side 20% of the bearing area.