A fully smooth three-screw pump screw rotor
A three-screw pump and screw technology, which is applied to parts of pumping devices for elastic fluids, rotary piston type/oscillating piston type pump parts, pumps, etc., can solve problems such as leakage and life reduction, and reduce wear and tear , improve the service life, and enrich the effect of the type of line
Inactive Publication Date: 2019-07-05
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology
[0004] In order to solve the problems of reduced service life and serious leakage caused by the cusp rotor on the rotor section profile, and to enrich the profile types of the screw rotor of the three-screw pump, the present invention proposes a fully smooth three-screw pump screw rotor
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[0050] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0051] Such as figure 1As shown, the section profile of a fully smooth three-screw pump screw rotor includes the section profile (201) of the driving screw rotor (1), the section profile (202) of the left driven screw rotor (2) and the right The section profile (203) of the driven screw rotor (3), wherein the section profile (202) of the left driven screw rotor (2) is exactly the same as the section profile (203) of the right driven screw rotor (3). The cross-sectional profile (201) of the active screw rotor (1) includes: 8 sections of circular arc, 4 sections of circular arc envelope, and the smooth transition of each adjacent curve, and a quarter of the formed line is in a clockwise direction It is: the first dedendum arc AB, the first arc envelope BC, the first connecting arc CD, the first addendum arc DE, and other parts of the curves are obtained ...
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The invention discloses an all-smooth three-screw pump screw rotor. The screw rotor comprises a driving screw rotor, a left driven screw rotor and a right driven screw rotor; the left driven screw rotor and the right driven screw rotor are completely same; the section line of the driving screw rotor comprises eight circular arcs and four circular arc envelope lines, adjacent curves are in smooth connection, the section line of each driven screw rotor comprises eight circular arcs and four circular arc envelope lines, and adjacent curves are in smooth connection. In the work process, the driving screw rotor and the driven screw rotor are engaged rightly; according to the screw rotor, the rotor stress property is improved, wear of the rotor in the engaging process can be reduced, the service life of the rotor can be obviously prolonged, the composition curve of the all-smooth three-screw pump screw rotor is simple, and only comprises two curves of the circular arc and the circular arc envelope line, and machining production is facilitated.
Description
technical field [0001] The invention belongs to the field of fluid machinery, and in particular relates to a fully smooth three-screw pump screw rotor. Background technique [0002] The three-screw pump is a rotary fluid machine with the advantages of large flow, stable operation, and low noise. It is widely used in petroleum, chemical, shipbuilding, and environmental protection industries; its core component is an active screw rotor and located on both sides of the active screw rotor. The shape of the screw rotor directly affects the sealing performance and mechanical properties of the pump; the section profile of the active screw rotor of a common three-screw pump is composed of a dedendum circle, a cycloid and an addendum circle, and the driven screw rotor The section profile of the rotor is composed of dedendum circle, long epicycloid and addendum circle; whether this kind of rotor is a driving screw or a driven screw, the section profile of the rotor has rough spots; S...
Claims
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IPC IPC(8): F04C18/16F04C29/00
CPCF04C18/165F04C29/00F04C2240/20
Inventor 王君杨舒然刘瑞青赵峰魏蜀红曹晨燕
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)