CN86104412A

CN86104412A - Bicorn rotator pump

Info

Publication number: CN86104412A
Application number: CN86104412.6A
Authority: CN
Inventors: 任世钧
Original assignee: Individual
Current assignee: Individual
Priority date: 1986-06-23
Filing date: 1986-06-23
Publication date: 1987-02-11
Also published as: CN1014345B

Abstract

The invention provides the basic structure of two-angle rotor straight shaft pump.Structural feature is: single arc epitrochoid is the cylinder body theory shaped wire, and envelope is the rotor theoretical contour in two arcs.Is the d-axis at eccentric distance e place through direction apart from the cylinder body center by deflection cylinder body weak point, and during by key and slide block rotation, move in the axle center that makes the rotor diagonal pass d-axis all the time.The pump that this structure forms.More than other rotor pump compactness.Swept volume can be about 1/2 of a cylinder body volume.Outside under the condition that root diameter is identical.Can be bigger 7 times than the swept volume of interior meshing gear pump.

Description

Bicorn rotator pump

The present invention relates to the mechanism of a kind of Bicorn rotator pump, particularly two-angle rotor straight shaft pump.

In miscellaneous pump, help by means of rotor and in cylinder, realize all rotor pumps that swept volume changes do rotation motion, characteristics such as compact structure is simple, and volume is little, and is in light weight are more remarkable.However, under the condition that guarantees reliability in the spreadable life, further reduce the weight/power ratio (pump weight/pump displacement) of pump.Remain the target that we pursue.Particularly when its during as the mechanism component part of the significant aspect, use field of some weight and volume (for example motor etc.), all the more so.

The purpose of this invention is to provide a kind of two-angle rotor straight shaft pump.It is not only compared with other rotor pumps, and structure is compact more, and also wants much superior aspect weight/power ratio.Its swept volume can account for about 1/2 of cylinder body volume; Outside under the condition that root diameter is identical, what its swept volume can be than interior meshing gear pump is also big 7 times.

Purpose is achieved in that and adopts single arc epitrochoid as the cylinder body theory shaped wire, envelope is as rotor theoretical contour (this rotor is a two-angle rotor) in two arcs, with the device drive rectangular shaped slider of a d-axis by key and so on, when allowing rotor on slide block, slide, the diagonal that guarantees rotor can intersect with the center line of d-axis all the time, and such rotor mechanism just can become the two-angle rotor straight shaft pump with above-mentioned key property.

Usually, epitrochoid is as the theory shaped wire of cylinder body, and corresponding interior envelope is as the pump of mechanism's formation of rotor theoretical contour, and structure can be complicated.Because the relative motion relation between cylinder body in the rotor mechanism and the rotor also needs a pair of interior meshing gear and realizes; The pump that two-angle rotor mechanism forms is no exception.But,, will find situation furthermore if we carefully observe and analyze the process of the cylinder shaped conductor formation of this class mechanism.To two-angle rotor mechanism wherein, as long as we manage to make the diagonal of rotor in operation process, all the time pass certain central slide, just can be in cancellation under the condition of meshing gear pair, realize the cylinder body of this pump and the operative relation between the rotor, thereby simplify the mechanism of two-angle rotor greatly, become the simple two-angle rotor straight shaft pump of compact structure.

Below in conjunction with accompanying drawing this pump structure and principle are made an explanation.

Fig. 1 is the cross-section profile of two-angle rotor straight shaft pump.Form the profile of cylinder body (2) by single arc epitrochoid.The import (1) of pump is arranged on the cylinder body (2).D-axis (6) drives slide block (8) rotation by key (5).Epitrochoidal interior envelope forms because rotor (3) profile is single arc, when slide block (8) rotation, rotor (3) is gone up at slide block (8) and is slided, and when its diagonal can move by the center of d-axis (6), according to geometrical relationship described below, we can know that two drift angles of rotor (3) are on any rotational position, can both contact with cylinder body (2) profile all the time, realize the variation of swept volume, liquid is sucked from import (1), discharge from outlet (10).

But, position when rotor (3), in the process of rotation, be under the situation shown in Figure 1, the profile of rotor (3) can just will be ended in compression stroke, or the suction stroke alternate periods that just will begin, swept volume is divided into two spaces that are connected hardly (4 and 9), at this moment, the resistance of discharging or sucking liquid here may be bigger, can produce or increase the weight of pocketed oil and cavitation phenomenon.For eliminating or reducing the possibility that this phenomenon exists, a recessed part (7) can respectively be set on the both sides contoured surface of rotor (3), more free from worry with the UNICOM that guarantees two spaces (4 and 9).

In addition, in the following description, we can know the slip of rotor (3) on cylinder body (2) profile in the running, in pump, there is liquid to do the environment of oiling agent, sliding scale is that being dispersed in translation distance α is on the formed rotor of angle of oscillation (3) the top arc surface of radius, and this structural feature provides advantageous conditions for the service wear that slows down rotor (3) top.

Fig. 2 is the profile diagram of two-angle rotor straight shaft pump.Corresponding with Fig. 1, form by cylinder body (2) rotor (3), slide block (8), d-axis (6) and cylinder cap (11), (12).On the both sides contoured surface of rotor (3), a recessed part (7) is arranged respectively.

Can find out directly that according to Fig. 1 and Fig. 2 the swept volume of two-angle rotor straight shaft pump can be greatly to being about 1/2 of the own volume of cylinder body (2).This performance is that other rotor pumps are not available; Under the identical condition of cylinder diameter, its swept volume can be about 8 times of interior meshing gear pump.

Fig. 3 is basic principle explanation of the present invention.Circle (R) rolls along the fixedly circle (K) with its inscribe.The P point is for justifying (R) outward certain a bit.The distance of ordering to P in the center of circle (R) is generating radius R.E is two circle throw of eccentric.

Pass between the radius K of the radius f of circle (R) and circle (K) is:

R: K=2: 1

Then:

E=r-K=K

α: β=2: 1

With this understanding, when the P point rolls with circle (R), track L ₁Camber line is single arc epitrochoid.Its parametric equation:

Generating radius R and camber line L ₁Upward the normal angle of any is arbitrarily:

Camber line L ₁Outer equal space line be L ₂Its parametric equation:

Camber line L ₁Interior envelope be L ₃Its parametric equation:

Outer equal space line L ₂Interior envelope be L ₄Its available P that passes through in practice ₁P ' P ₂3 circular arc replaces.

Fig. 4 justifies (R) and the partial enlarged drawing of justifying (K) relative motion relation among Fig. 3.It has proved the diagonal of two-angle rotor very simply, when rotor turns round, is justifying slip on the B point of (K) all the time.

The B point of circle on (K) is that two circles roll as yet relatively, the A point on circle (K) and the circle (B) on the x axle when tangent, the point of contact on round (K).This moment, generating radius R and x axle overlapped.When circle (R) rolls, because α: β=2: 1, by relations such as between the geometric corresponding angles and exterior angle and non-conterminous interior angles, can know that generating radius R or its elongation line are under the situation of any numerical value at the β angle, all pass through the B point on the circle (K).And when rotor rotation one during week, length is that the rotor diagonal of 2R is 4e at the sliding scale of this point.Fig. 4 clearly illustrates that the position that B is ordered is on the x axle of e apart from its center in the single arc epitrochoid minor axis direction of deflection.

If we are mapped the part in addition of the camber line among Fig. 3-Fig. 4 etc. and Fig. 1-Fig. 2, promptly outer equal space line L ₂And the actual molded lines of cylinder body (2) is mapped, interior envelope L ₄And the real contour line of rotor (3) is mapped, and the B point on the circle (K) and the position of d-axis (6) are mapped, and so, we just can obtain the basic structure of two-angle rotor straight shaft pump.

Right in addition, if interior envelope L ₄And the real contour line of rotor (3) is mapped, so, and can be two camber line L of Fig. 3 ₃Intersection point as the center, be radius with translation distance α, removable wear-resisting straight pin or wear-resisting scraping blade are set, can improve the wear resistance of rotor apex.

Claims

1, single arc epitrochoid is cylinder body (a 2) theory shaped wire, and envelope is rotor (a 3) theoretical contour in two arcs, goes up and arranges to have import (1) and outlet (10) in cylinder body (2) or cylinder cap (11), (12), and the pump of such rotor mechanism composition is characterized in that:

The axle of a, rotor pump is d-axis (6),

B, d-axis (6) can pass through key (5) and drive slide block (8) rotation,

C, under the condition that keeps the swept volume sealing, when slide block (8) promoted rotor (3) and rotates in cylinder body (2), rotor (3) diagonal can move by the axle center of d-axis (6) all the time.

2, according to the rotor mechanism of claim 1 regulation, it is characterized in that the position of d-axis (6), just be partial to the minor axis direction of cylinder body (2), and be eccentric distance e apart from cylinder body (2) centre distance.

3, according to the rotor mechanism of right 1 regulation, it is characterized in that d-axis (6), key (5) and slide block (8) also can be integrated.

4, according to the rotor mechanism of right 1 regulation, it is characterized in that the drift angle with two-angle rotor (3) theoretical contour is the center, removable wear proofing devices such as straight pin that radius is translation distance α or scraping blade can be set.