Gap distribution for reducing leakage area

Gap distribution for reducing leakage area

  • CN 1,256,365 A
  • Filed: 11/30/1999
  • Published: 06/14/2000
  • Est. Priority Date: 12/10/1998
  • Status: Abandoned Application
First Claim
Patent Images

1. the rotor (14 of a pair of conjugation engagement, 16), each described rotor has a plurality of prominent lobes, should comprise spirality tooth top (P by prominent lobe, U, M) and middle groove (R, O, K), and be suitable in a working space of a helical rotor machine (10) around parallel rotational, each described rotor has a top circle (TF, TM), one pitch circle (PF, PM) and a root circle (R), a described rotor is a female rotor (14) that forms like this, it is the described pitch circle that the major component of each described prominent lobe of described female rotor is positioned at described female rotor, another rotor (16) is a male rotor (16) that forms like this, the major component that is each described prominent lobe of described male rotor is positioned at outside the described pitch circle of described male rotor, the all described tooth top of each rotor is introduced along all described groove of another described rotor, between a pair of described rotor, to form a continuous seal, two described rotors are by being positioned at least near the contact zones (B-C) of the described pitch circle part of each described rotor driving engagement each other, two described rotors rotate with a constant pitch circle speed, this to the running clearance between the described rotor (A-A '"'"'-B, C-C '"'"'-D, E-E '"'"'-F, the characteristics of G-G '"'"'-H) are:

  • it is by when two described rotors rotate with a constant pitch circle speed, represent in all gaps that their immediate all points are between all conjugation contact pointss at this described rotor, described running clearance is between two described epitrochanterian a pair of cooperation sections, the described top circle that this two section is close to this described rotor from a bit extending to of the described pitch circle that is close to a described rotor at least a bit, with the root circle that is close to this another described rotor from a bit extending to of the described pitch circle that is close to another described rotor at least a bit, described running clearance changes when along all prominent lobe surface measurement in a radial plane, all described cooperation sections be close to separately top circle and during root circle described running clearance bigger, described running clearance is less when all described mesh sections are close to separately all pitch circles, described variable characteristics are;

    when all described mesh sections are close to top circle separately and change during root circle very fast, and when all described mesh sections are close to separately all pitch circles, change less, thereby reduced leakage.

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