CN2316489Y

CN2316489Y - Rotor pump without turning clearance

Info

Publication number: CN2316489Y
Application number: CN 96244034
Authority: CN
Inventors: 刘殿魁; 刘力
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-11-15
Filing date: 1996-11-15
Publication date: 1999-04-28
Anticipated expiration: 2006-11-15

Abstract

The utility model relates to a rotor pump without running clearance. The utility model is mainly realized by that a rotor is divided into a cycloid body and a circular sleeve barrel between which an elastic sealing sleeve is arranged. Internal leakage caused by clearance is completely eliminated, which can make pump flow constant. The utility model can enhance pump efficiency, and can save energy; the cycloid body which is excessively worn can be replaced again and again; the pump service life can be extended in multiples.

Description

The rotor pump of no running clearance

The utility model is that a kind of radially running clearance perseverance is zero rotor pump, relates to the rotary volume pump (or blower) in the fluid machinery.Its working principle is referring to accompanying drawing 1, and driven rotor (1) and power rotor (3) are done the counter-rotating such as rotating speed such as grade with n angular velocity in fixed pump body (2).Respectively there are two dispatch spaces shown in abcd at the outer rim place of two rotors, and during the rotor rotation, the fluid in dispatch space is promptly constantly carried the outlet that is delivered to the pump housing (2) by the inlet from the pump housing (2).Because two rotors keep engagement forever in the central authorities of the pump housing (2), shown in the P in the accompanying drawing 1, so high-pressure liquid can be from the outlet adverse current to inlet.

Its rotor of existing pump and the pump housing are the metal manufacturing, owing to processed the restriction with assembly precision, must leave suitable radial clearance, otherwise can make between rotor and the pump housing or two rotors stuckly, cause damage.But the gap is big more, leaks then greatly more, and pump delivery can reduce.When in fluid, hard point being arranged, owing to wash away, abrasive action, pump this stays and gives the gap and can in use strengthen gradually, when acquiring a certain degree, even makes the fluid of dispatch all drain back to inlet, and pump total failure becomes the no load running state.When for example using rotor pump to carry sand containing crude oil at present in the oil field, this problem has just become insoluble difficulty.

The utility model intention is providing a kind of rotor pump, makes the rotor and the pump housing, and radial clearance is zero forever when turning round between rotor and rotor, adopts the interior elastic sealing structure of pump to realize this purpose.

Elastic packing is contained in epitrochanterian concrete structure as shown in Figure 2: rotor is divided into three parts, and cycloid body (4) that promptly two shapes are identical and circular sleeve (5) leave suitable radial clearance therebetween, and rotor is driven by key (6) and axle (7) and rotates.On circular sleeve (5), have notch, wherein sliding sleeve (8) can radially slide in this notch, sliding sleeve (8) tightens together with screw with cycloid body (4), under the effect of the distortion elastic force of spring (9) and rotary centrifugal force, two cycloid bodies of same rotor, on the circular sleeve that is pressed on another rotor, another is pressed on the pump housing internal surface.Make pump like this in running, the rotor and the pump housing do not have radial clearance between rotor and rotor, and the roulette body (4) of same rotor and the radial clearance between the circular sleeve (5) are interdicted because of the existence of sliding sleeve (8), also play the effect of sealing.

Cycloid body (4) should be used made more easy to wear, becomes easily damaged parts.Like this, changed after the long-term work wearing and tearing, pump performance can be recovered as before again, and this can prolong the working life of pump greatly.Particularly particularly useful when containing hard solid particle in the liquid.

Rotor pump shown in the accompanying drawing 1, also be commonly referred to as Roots pump (pump Roots blower) both at home and abroad, its rotor can have multiple shape, in figure, have the two lobe rotor of two cycloid bodies (4), three lobe rotor and some other shapes that three the cycloid bodies (4) that are 120 ° of circumferential arrangement can also be arranged all can be implemented to improve by method of the present utility model.It is a non-limiting examples that double leaf in the accompanying drawing 2 does not have the gap rotor pump.

The utility model has the advantages that: eliminated the gap between rotor pump internal rotor and rotor, rotor and the pump housing, just thoroughly eliminated the internal leakage that therefore rotor pump in the past causes, the flow of pump and corresponding pump efficiency are improved, reached the effect of energy saving.In addition, because of the operation of no gap, wearing clearance does not strengthen gradually the flow of pump is reduced gradually in the time of can be because of running, and this has more shown its advantage in the technological process that requires constant flow.

The drawing explanation:

Accompanying drawing 1 is the structural section figure of existing rotor pump.(1) is driven rotor among the figure, and (2) are the fixed pump body, and (3) are power rotor.

Accompanying drawing 2 is structural section figure that the elastic packing rotor is housed, and (4) are the cycloid body among the figure, and (5) are circular sleeve, and (6) are key, and (7) are axle, and (8) are sliding sleeve, and (9) are spring.

Claims

1. rotor pump that does not have running clearance, it is characterized in that rotor is divided into cycloid body and circular sleeve two-part, be the resilient connection of band sealing therebetween: fixing sliding sleeve on the cycloid body, sliding sleeve drives the cycloid body and can move radially, on circular sleeve, have notch, the spring of sliding sleeve and its underpart is contained in this notch, slide under the spring action directly outwards sliding during the rotor rotation, certain epitrochanterian cycloid body is pressed on the pump housing, another is pressed on another rotor, has eliminated the gap of rotor pump internal rotor and rotor, rotor and the pump housing.