CN1071998A

CN1071998A - Double acting type rolling rotor compressor motion principle and structural design

Info

Publication number: CN1071998A
Application number: CN 91108449
Authority: CN
Inventors: 韩春雷
Original assignee: 沈兰萍
Priority date: 1991-10-29
Filing date: 1991-10-29
Publication date: 1993-05-12

Abstract

The invention relates to the invention of a kind of novel rotor formula compressor and vacuum pump.The eccentric circle rotor can be realized air-breathing, compression, the exhaust cycle of gas a cross section is connected the die cavity of two semicircles by two straight lines under the drive of eccentric shaft, eccentric shaft whenever rotates a circle, and element volume just can be finished said process.This compressor and vacuum pump have reliable apex combustion seal, can stop the internal leakage that is caused by rolling rotor and body clearance preferably, thereby improve volumetric efficiency.

Description

Double acting type rolling rotor compressor motion principle and structural design

The invention relates to a kind of novel rolling rotor type compressor motion principle and the invention of structural design.This principle and structure also are applicable to vacuum pump.

Existing rotary compressor, as screw type, roots-type, Scroll-type, wankel formula etc., the moving parts surface all is complicated curve form, and the processing of these curved surfaces and check are all complicated, and what have also needs special device.

The present rolling rotor type compressor of widely applying, though rotor and the rounded cross section of housing die cavity, this compressor need be provided with a reciprocating slide plate, and slide plate is separated into two isolated parts with crescent-shaped space, a part is an air aspiration cavity, and a part is a compression chamber.The slide plate end face contacts with rotor surface all the time, thereby causes the phenomenon of slide plate serious wear.In every two weeks of rotation of rotor, that element volume just can be finished is air-breathing, compression, exhaust process.Brought gas big, the situation that volumetric efficiency is low thereupon.Between rotor and housing certain movement clearance must be arranged, so that rotor can run well, gas certainly will produce leakage by the gap, the situation that has caused volumetric efficiency to descend.The main internal leakage of compressor such as screw type, roots-type belongs to this situation.

Most of rotary compressors are arranged again, are to solve by slide plate or apex sealing strip as the radial seal of sliding vane, rotary-piston type etc.When rotor revolved, with these seal arrangements that housing closely contacts, its contact position all changed in very among a small circle at one, thereby causes seal arrangement and housing heavy wear, and easily produces chatter mark on housing.

In order to solve above-mentioned all problems, the inventor has finished the present invention finally through conscientiously research.

The objective of the invention is in order to provide a kind of housing die cavity, rotor profile easy to process, be easy to check, radial seal between rotor and housing is reliable, it is little to wear and tear, rotor whenever rotates a circle, and that element volume just can be finished is air-breathing, the novel double acting type rolling rotor compressor and the vacuum pump of compression, exhaust cycle.To remedy the deficiency of existing compressor and vacuum pump.

The present invention is that to drive the eccentric circle rotor with eccentric shaft be that two straight lines connect to move in the die cavity of two semicircles and realize in a cross section.The eccentric circle rotor is divided into two-part with the housing die cavity, and a part is an air aspiration cavity, and a part is a compression chamber.Be provided with the intakeport that is communicated with air aspiration cavity in the eccentric circle rotor, relief opening is located on the semi circular surface at die cavity two ends.Marrow the rotation of eccentric shaft, and the eccentric circle rotor can realize in die cavity that every is changeed twice suction, row's process.

Radial seal between the eccentric circle rotor housing is achieved in that the die cavity straightway is replaced by slide plate, and when the eccentric circle rotor motion, slide plate contacts with the contact points of eccentric circle rotor cylindrical all the time by elastic element, thereby realizes radial seal.Also can adopt on eccentric circle suit to have the elastic ring of intakeport, or spraying plating on eccentric circle rotor cylindrical, mold pressing one deck is wear-resisting and the rubber-like material, makes itself and die cavity that being rotatably assorted of interference be arranged, to realize radial seal.Also can adopt the combination of above-mentioned seal form.

The present invention is described in further detail below in conjunction with accompanying drawing:

Fig. 1 is motion principle figure of the present invention

Fig. 2 is a main structure drawing in side sectional elevation of the present invention

Fig. 3 is suction means distribution figure of the present invention

The present invention is achieved in that with reference to Fig. 1, makes pure rolling when a radius equals to decide half moving circle [2] of circle [19] radius in fixed circle [19], and hypocycloid formed point [16] and degenerated on the X-axis one toward complex line this moment, and its territory is [R, R].With this formation point [16] is that a circle [3] that is connected with moving circle [2] is done in the center of circle, and the rolling of moving circle [2] just makes circle [3] do plane motion clocklike.The center of circle of circle [3] all the time point-blank, the movement locus of its cylindrical [8] can be with envelope [11] containing of a sealing, this envelope has just constituted the die cavity of circle [3].

With reference to Fig. 2, the circle among Fig. 1 [3] is defined as eccentric circle rotor [3].

Compressor of the present invention and vacuum pump should drive the moving circle [2] that is connected with eccentric circle rotor [3] by eccentric shaft [1] and rotate, moving circle [2] should be all the time a radius equal its radius twice decide do pure rolling in the circle [19], eccentric shaft [1] has with moving circle [2] and relatively rotates.The cylindrical of eccentric circle rotor [3] is one to have the circle in hole.[16] be the center of circle of eccentric circle rotor, the center of circle [16] are connected with it and move the throw of eccentric that the centre distance of justifying [2] center of circle [17] equals eccentric shaft [1].

The motion of eccentric circle rotor [3] has formed housing die cavity [11], and the present invention requires die cavity [11] is revised.Straight section should be not less than slide plate [13] formation of theoretical straight length by two length, and the expansionary force of slide plate in housing is made of elastic element, as leaf spring [14], cylindrical spring [15] etc.; Or by gas, fluid power [18] formation.The semicircle at two ends should be the curve that former theoretical profile expands outwardly, and relief opening [10] should be located on the curved surface at two ends, and outlet valve [9] is arranged in the housing of corresponding surface.Should be provided with the limit stoper that cooperates with housing on the slide plate, anti-limited slip plate enters cavity volume.

Be provided with an intakeport [5] in the eccentric circle rotor [3], the hole that this aperture forms on eccentric circle rotor cylindrical, be to be the hole of symmetry axis with cylindrical bus [12], the cylindrical center line [16] of the axis of symmetry [12] and eccentric circle rotor [3] is linked to be straight line, again [16] and the center line [17] that moves circle [2] are linked to be straight line, the angle of these two straight lines should be in 70 °～90 ° scopes.

[8] being to be enclosed within the elastic ring that has intakeport on the eccentric circle rotor [3], also can be trip ring wear-resisting and that other composite materials of rubber-like are made, and [8] relatively rotate with [3] nothing, and [4] are compressor housings, and [7] are the element volumes of compressor.

[6] be for loam cake air-breathing and sealing usefulness, the position has a hole [20] that is communicated with all the time with the last intakeport [5] of eccentric circle rotor [3] in the central, so that compressor or vacuum pump have enough gas to suck element volume in suction condition, thereby guarantee realization of the present invention.

Claims

1, one drives eccentric circle rotor [3] carries out the suction process and has apex combustion seal in die cavity [11] compressor and vacuum pump by eccentric shaft [1], it is characterized in that:

(a) described eccentric circle rotor [3] is gone up and is had a moving circle [2] that is connected with it.Moving circle [2] can equal its diameter twice and deciding of overlapping with eccentric shaft [1] center of rotation done pure rolling in the circle [19] at a diameter under the drive that eccentric shaft [1] rotates.The center of circle of eccentric circle rotor [3] cylindrical [8] and moving circle [2] are gone up hypocycloid straight formation point [16] concrete mutually of degrading.

(b) should to be eccentric circle rotor [3] rotate down the enveloping outer enclosure of its cylindrical [8] formation track to the molded lines of die cavity [11] continuously at eccentric shaft [1].

(c) eccentric shaft [1] adopts to have in relative rotation with eccentric circle rotor [3] and cooperates.

2, eccentric circle rotor according to claim 1 [3], it is characterized in that: the hole that setting-up eccentricity axle [1] is arranged on this rotor, this center, hole [17] overlaps with moving circle [2] center, and the distance between the center of circle [16] of this center [17] and eccentric circle rotor [3] equals the throw of eccentric of eccentric shaft.Also have in the eccentric circle rotor [3] with rotor cylindrical [8] and communicate, be used for intakeport to the air aspiration cavity gas transmission.Rotor cylindrical [8] is a cylindrical shape always.

3, according to claim 1,2 described eccentric circle rotors [3], its feature also is: air-breathing aperture [5] in the hole that eccentric circle rotor [3] cylindrical [8] go up to form, and is to be the hole of symmetry axis with cylindrical bus [12].The axis of symmetry [12] is connected straight line with the center line [16] of eccentric circle rotor [3] cylindrical [8], again [16] and [17] is connected into straight line, the folded angle of these two straight lines should be in 70 °～90 °.

4, die cavity according to claim 1 [11] is characterized in that: its straight section should be not less than slide plate [13] formation of theoretical straight length by length, and the bottom of slide plate [13] should have makes slide plate [13] inwardly produce the element of expansion all the time.This element can be the spring of any kind, as leaf spring [14], cylindrical spring [15] or gas, fluid power [18].

The cambered surface part should be the abducent semi-cylindrical of theoretical profile or other curved surfaces.

5, by the requirement of claim 1,4, should have relief opening [10] on two arc surfaces of housing die cavity [11].Outlet valve [9] should be arranged in the housing of corresponding cambered surface, it is characterized in that, relief opening [10] is located on the arc surface.

6, according to claim 1,2 described compression sets and its feature of eccentric circle rotor [3] also are: the central authorities of loam cake [6] should have a hole that is communicated with all the time with the air-breathing aperture of rotor [3] end face [5].The end face of eccentric circle rotor [3] should have concave station.

7, according to claim 1,4 described die cavities [11] and slide plate [13], its feature also is: should be provided with the limit stoper that matches with die cavity housing [4] on the slide plate [13], anti-limited slip plate enters in the die cavity.