CN102400892A

CN102400892A - Fully no-clearance type of piston reciprocating compressor

Info

Publication number: CN102400892A
Application number: CN2011102587581A
Authority: CN
Inventors: 梁嘉麟
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-08-30
Filing date: 2011-08-28
Publication date: 2012-04-04
Also published as: CN102261321A; CN102384069A; CN102410174B; CN102384067A; CN106286217A; CN102384062B; CN102384066A; CN102384067B; CN102384070A; CN102384063A; CN102384062A; CN102278296A; CN102410174A; CN102384064A

Abstract

The invention relates to a fully no-clearance type of a piston reciprocating compressor, which is realized through the improvement in the aspect of completely exterminating 'clearances', i.e. is realized through the improvement based on a ZL200410030658.3 'no clearance' technology. From the perspective of a structure principle, a piston (5), a vent valve plate (3), a conical aspirating valve block (4), a piston ring (K) and an air cylinder (6) can form a fully no-clearance contact state without geometrical space in an instant moment. The most traditional piston reciprocating compressor can appear in a brand new appearance: the actual air displacement of the piston (5) approaches to 100% under any work condition, further the compression ratio of the piston can be greatly improved, which provides conditions for the compressor to become an upgraded product of the piston reciprocating compressor, and even provides conditions for the compressor to become an upgraded product of various compressors in other projection fields due to the substantial improvement of the cost performance of the compressor.

Description

Piston reciprocating compressor completely without the clearance pattern

Technical field.

The present invention relates to the technology of piston reciprocating compressor, especially the technology of " completely without clearance " type.

Background technique

Great majority in the compressor kind of coming out at present all are the conventional piston compressors by crank-driven; It has: make simple; Long service life; Wait the comprehensive characteristics that other kind compressor can't be by comparison to material is less demanding, this has been a unfailing main cause since its comes out.

Piston reciprocating compressor is the same with other compressors, owing to structurally receive the puzzlement of insurmountable " clearance " problem, so its exhaust efficiency is or/and compression ratio is difficult to raising all the time.---for example: when compression ratio approached " 10 ", its air displacement will be reduced to the degree that loses its work meaning.

" clearance " in the existing piston reciprocating compressor comprising: between the outer top of piston and the cylinder inner top and because air-breathing and " clearance " that the two mechanism of exhaust must exist, and the clearance that causes owing to the existence of piston ring.

Summary of the invention

The present invention's purpose:

The present invention's purpose: the structure that has proposed a kind of piston reciprocating compressor " completely without clearance ".

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

2. on the model structure basis that piston back and forth moves, three mechanisms that satisfy following a, b and c again are provided with condition:

A. the top outer adapted of piston is controlled the taper Aspirating valves piece that suction port opens and closes;

B. at least with the outside of piston and top flush on be provided with the piston ring that constitutes by the unfilled corner rectangular cross section, and this unfilled corner position is positioned at the ring side upper top of piston ring section;

C. piston is in compression exhaust stroke forward; Can back down exhaust valve plate at last and go out cylinder; Piston is in backward travel; Desire to return to fully in the cylinder when piston, in the moment that the exhaust valve plate outside being about to and being blocked in by cylinder separates, will cause and form " completely without the clearance " contact condition that does not have geometric space between piston, exhaust valve plate, taper Aspirating valves piece, piston ring and the cylinder.

---exhaust valve plate is the top that is positioned at cylinder through the elastic device of one type on spring.

The present invention and existing technology characteristics relatively:

Owing to proposed the structure Design scheme of above-mentioned piston reciprocating compressor " completely without clearance "; This just is: piston reciprocating compressor can realize that on its structural principle the structural type of " completely without clearance " working state and the method for operation all created condition; Make it: theoretical air displacement reaches 100% degree; And all be in close proximity to 100% under actual row tolerance what working condition in office, and and then can improve its work compression ratio significantly and create condition again.

Description of drawings

Fig. 1 has illustrated the embodiment of the present invention in the driving high-power piston reciprocating compressor of horizontal crankshaft.

Fig. 2 has illustrated the relative position of piston-advance (exhaust) when operation piston, valve and cylinder of Fig. 1 type.

Fig. 3 has illustrated the piston of Fig. 1 type to retreat the relative position of (air-breathing) when operation piston, valve and cylinder.

H: zone of high pressure; W: low pressure area; K: the piston ring that constitutes by the unfilled corner rectangular cross section; N: common conventional piston ring; P: the suction port of piston head; D: AC motor; 1: cylinder cap; 2: spring; 3: exhaust valve plate; 4: taper Aspirating valves piece; 5: piston; 6: cylinder; 7: bent axle; 8: connecting rod; 9: body; 10: set screw.

Embodiment

Fig. 1 has illustrated the structure in general of a kind of crank-driven type piston reciprocating compressor " completely without clearance ".

Fig. 2 has illustrated piston 5 when compression exhaust stroke forward, carrying piston ring K together, heads on the situation that exhaust valve plate 3 is advanced in the outside, hole of cylinder 6 together.Obviously:

A. at piston 5 with before exhaust valve plate 3 contacts, just in cylinder 6, formed the high pressure air cushion that will alleviate piston 5 and exhaust valve plate 3 mutual collision dynamics between this two;

B. mean this moment: piston 5 is all clamp-oned zone of high pressure H with the pressurized gas that are compressed into;

C. should on structural design, guarantee: piston ring K can not all break away from the hole of (going out) cylinder, otherwise piston ring K just can not carried again by piston 5 and return cylinder 6.In addition, piston 5 is gone out the stroke part at cylinder 6 holes, can be controlled in its effective travel length about 1/10th or littler.

Fig. 3 has illustrated piston 5 when the suction stroke of retreating, to pass through the state of the taper Aspirating valves piece 4 inspiration low-pressure gases at its top.Obviously:

A. structurally adopt the downflow type suction mechanism to meet the model structure requirement of " completely without clearance " most.

B. be in starting stage of backward travel when piston 5, promptly before the hole of piston 5 complete setback cylinders 6, at first by larger-diameter exhaust valve plate 3 will be more small-bore cylinder 6 the hole top seal firmly, will form this moment:

The state (with regard to structure theory) of " completely without clearance " between piston 5 (comprising the piston ring K that is positioned at its outer rim), taper Aspirating valves piece 4, exhaust valve plate 3 and the cylinder 6.---at the moment after; Just can not exist like the inflation process of residual high pressure gas in the existing technology; The suction stroke stage that directly lets piston 5 just get into to have actual air-breathing meaning is till space between piston 5 to the exhaust valve plate 3 fills up in cylinder 6 by the low-pressure gas of inspiration.

In sum; See from structural principle of the present invention; Be in suction stroke of the present invention when piston 5 but do not carry out as yet when air-breathing; Promptly mainly be under anticyclonic driving, the moment that lets exhaust valve plate 3 that the hole top seal of cylinder 6 is lived: will form most critical: " completely without clearance " contact condition of not having geometric space between piston 5, exhaust valve plate 3, taper Aspirating valves piece 4, piston ring K and the cylinder 6 five.

Relate to the problem that the piston ring K that is unfilled corner rectangular cross section shape (this unfilled corner is positioned at the ring inside top) realizes " no clearance " about adopting among the present invention:

The key that the piston ring K that utilizes the present invention to adopt is unfilled corner rectangular cross section shape is: piston 5 and piston ring K are that the fashion of extrusion through certain slope contacts; The machining mode of the plane lapping that carries out with piston 5 tops through piston ring K is implemented in easily and can guarantees again under the prerequisite of this two sealing that this two top is positioned at same plane.

High pressure problem of temperature rise about high compression ratio type of the present invention:

High compression ratio or extra-high-speed compression ratio type will inevitably face the high temperature rise problem for compressor; This can adopt general air cooling way to solve, and also can adopt the water-cooling pattern as motor car engine (exploding the operation of driven plunger through gasoline high temperature) to solve.

Obviously:

Now; The piston reciprocating compressor that " clearance is arranged ", it has makes simple and " cost performance " very high characteristics, if realized the structure of " completely without clearance " of the present invention; Make its " cost performance " just can rise by a larger margin; Not only this will let piston reciprocating compressor with the longest history can become the update product of traditional piston reciprocating compressor, and, also probably become the update product of all kinds compressor that uses in the Other Engineering field.

Claims

A piston reciprocating compressor completely without the clearance pattern, back and forth on the model structure basis of operation, three mechanisms that satisfy following a, b and c again are provided with condition at piston (5):

A. the top outer adapted of piston (5) is controlled the taper Aspirating valves piece (4) that suction port (P) opens and closes;

B. at least with the outside of piston (5) and top flush on be provided with the piston ring (K) that constitutes by the unfilled corner rectangular cross section, and this unfilled corner position is positioned at the ring side upper top of piston ring (K) section;

C. piston (5) is in compression exhaust stroke forward; Can back down exhaust valve plate (3) at last and go out cylinder (6); Piston (5) is in backward travel; Desire to return to fully in the cylinder (6) when piston (5), in the moment that the exhaust valve plate (3) outside being about to and being blocked in by cylinder (6) separates, will cause and form " completely without the clearance " contact condition that does not have geometric space between piston (5), exhaust valve plate (3), taper Aspirating valves piece (4), piston ring (K) and the cylinder (6) five.
A piston reciprocating compressor according to claim 1 completely without the clearance pattern, it is characterized in that: exhaust valve plate (3) is the top that is positioned at cylinder (6) through the elastic device of (2) one types on spring.