CN102384068A

CN102384068A - Piston ring structure capable of reducing or eliminating clearance between piston and air cylinder and processing method thereof

Info

Publication number: CN102384068A
Application number: CN2011102408064A
Authority: CN
Inventors: 梁嘉麟
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-08-30
Filing date: 2011-08-15
Publication date: 2012-03-21
Also published as: CN102418687B; CN102384065A; CN102384065B; CN102418687A

Abstract

The invention relates to a piston ring structure capable of reducing or eliminating a clearance between a piston and an air cylinder and a processing method thereof. On the basis of the structure of the existing piston (2), a piston ring (1) is in the shape of a double-unfilled angle fit section (4) from the ring inner side to the ring outer side; a notch of the section (4) is in sliding fit with a gradient contact surface on a ring groove (3); the whole piston ring (1) is arranged at a position where the ring-shaped plane of the piston ring (1) is flush with the top part of the piston (2); and the piston ring (1) is positioned by the ring groove (3) anastomotic with the section (4). A processing method for the piston ring structure capable of reducing or eliminating the clearance between the piston and the air cylinder comprises the following steps that: the piston ring (1) which is in the shape of the double-unfilled angle fit section (4) from the ring inner side to the ring outer side is sleeved on the ring groove (3) of the piston (2), and then the upper top parts of the piston (2) and the upper top parts of the piston ring (1) are plane-ground. The piston ring structure is suitable for any existing machine model in which the volume of the clearance between the piston (2) and the air cylinder (5) needs to be reduced or eliminated at least.

Description

Can reduce or eliminate the piston ring structure and the processing method thereof of clearance between piston and the cylinder

Technical field.

The present invention relates to the structure technology of piston reciprocating compressor, especially related to the structure and the processing method thereof of piston ring.

Background technique

Between the piston and cylinder in the present piston reciprocating compressor; Relying on the elastic ring piston ring with outside circumferencial direction to restrict the purposes of leaking gas between the high low pressure of piston two ends as the middle transition parts is provided with; Yet; Do not consider how to reduce completely: leave the nearest piston ring of piston head to the clearance volume problem that exists between the piston head between piston and the cylinder, the clearance problem that promptly is commonly called as as far as possible.---from macroscopic perspective, this clearance is more little, for the exhaust efficiency that improves compressor or/and compression ratio is favourable.

Summary of the invention

The present invention's purpose:

A kind of design proposal and processing method thereof that reduces significantly or eliminate above-mentioned clearance proposed.

In order to realize the foregoing invention purpose, intend the technology below adopting:

On the basis of existing structure of piston; Piston ring is the fit section configuration of two unfilled corners in the lateral rings outside in the ring; The breach of this section and the gradient surface of contact on the annular groove are for being slidingly matched; Whole piston ring is arranged on locational that its ring plain flushes with piston head, and this piston ring is to implement to locate through the annular groove that matches with above-mentioned section.

Processing method of the present invention is following:

The piston ring that will be two unfilled corners zoarium sections in the lateral rings outside in the ring packs on the annular groove of piston, then the upper top of this piston is carried out plane lapping with the upper top of this piston ring.

The present invention and existing technology characteristics relatively:

Because the shape of the piston ring section of the fit section of two unfilled corners in the lateral rings outside in the ring that adopts; And; It is arranged on locational that the ring plain at piston ring place flushes with piston head, and, again owing to let the upper top of piston carry out plane lapping to process with the upper top of this piston ring; This is just for reaching the purpose of the invention described above, promptly reduces significantly even extremely beneficial condition has been created in the clearance eliminated between piston and the cylinder.

Description of drawings

Fig. 1 has illustrated its section to be the piston ring section configuration of V-type and to be positioned at the position on the piston.

1: piston ring; 2: piston; 3: annular groove; 4: the fit section of two unfilled corners that is the lateral rings outside in the ring; 5: cylinder.

Embodiment

Between the piston 2 and cylinder 5 that have conventional crank-driven type piston reciprocating compressor now; The piston ring 1 that is provided with generally has two at least, is rectangular cross section, and there wherein have a piston ring 1 to leave piston 2 tops to be nearer; Yet; This " nearer " is that certain distance is arranged, and this distance and piston 2 and the cylinder 5 gap area of section between the two is long-pending, has just formed the clearance volume (clearance that is commonly called as) between above-mentioned piston 2 and the cylinder 5.Reduce the model structure of this clearance volume for some hope, adopted the present invention's technology, then can obtain desirable effect.

When the two fully contacts with another plane through the plane that constitutes side by side by this if desired, will be easy to guarantee can form another " no clearance " state between these two planes that fully contact, if; Because the structure of existing piston reciprocal compressor determines; The clearance that it exists can't overcome, yet, however; Above-mentioned " no clearance " state remains favourable for the whole clearance that reduces traditional piston reciprocating compressor.

In addition; The piston ring 1 of above-mentioned fit section 4 shapes of two unfilled corners that are the lateral rings outside in the ring; Since it with piston 2 tops contact the gradient by the center of circle towards circumferencial direction; Therefore in the middle of piston 2 is implemented the process of pressurized gas; This piston ring 1 that is fit section 4 shapes of two unfilled corners in the interior lateral rings of the ring outside can produce the additional horizontal compressive component towards circumferencial direction, and this additional extruding horizontal component can and become big along with the pressure rising that is compressed gas, and this additional extruding horizontal component is extremely beneficial in high pressure and the gas leakage between the low pressure of preventing piston 2 two ends.---the reasons are as follows: always can exist certain between annular groove 3 and the piston ring 1 even extremely small tolerance fit; Need only during machining and fully grasp and realize this point consciously; Just can make piston 2 in the middle of the process of pressurized gas; Increased the horizontal compressive component on cylinder 5 circumferencial directions again, and this horizontal compressive component is to be directly proportional with the pressure that is compressed gas.

In a word, based on above-mentioned structural principle, be " no clearance " state that to realize between above-mentioned piston 2 and the cylinder 5 at least.

As for other plug rings 1 that are provided with between piston 2 and the cylinder 5, just little for the meaning that reduces clearance volume, can still adopt the conventional section configuration of existing technology, for example: its section is a rectangle.

Claims

1. piston ring structure that can reduce or eliminate clearance between piston and the cylinder, on the basis of existing structure of piston,

It is characterized in that:

Piston ring (1) is fit section (4) shape of two unfilled corners in the lateral rings outside in the ring; Gradient surface of contact on breach of this section (4) and the annular groove (3) is for being slidingly matched; Whole piston ring (1) is arranged on locational that its ring plain flushes with piston (2) top; And this piston ring (1) is to implement to locate through the annular groove (3) that matches with above-mentioned section (4).

2. the processing method that can reduce or eliminate the piston ring structure of clearance between piston and the cylinder according to claim 1,

It is characterized in that:

The piston ring (1) that will be two unfilled corners zoarium sections (4) in the lateral rings outside in the ring packs on the annular groove (3) of piston (2), then the upper top of this piston (2) is carried out plane lapping with the upper top of this piston ring (1).