SU1446345A1 - Multipurpose positive-displacement rotor machine - Google Patents

Abstract

The invention allows to simplify the design of a volumetric rotary machine. On the housing 1, end caps with windows 13 are mounted, connected to the inlet and outlet manifolds. In cor

Description

(ABOUT

4 i (

05 WITH

four; sd

FIG. /

The pushes are located synchronously rotating four rotors (P) 4 with a bounded circular arc of a profile. The profile of each P 4 is formed by four circular arcs with centers at the vertices of an isosceles trapezium (T). The side of T is equal to its midline. Two arcs with centers at opposite vertices of T are located within the angles at these vertices. The remaining two arcs with the centers at the other opposite vertices of T are located within the corners vertical to the corners at these vertices. Arcs with centers at the vertices at one side of T are conjugates. The center of the circumscribed circle around T is on the axis of rotation F 4. The distance between the axes of rotation of adjacent P 4 is equal to the sum of the length of the largest base T and the doubled length of the arc radius located within an angle vertical to the acute angle at this base. P 4 are arranged in such a way that identical sides T are parallel. The same

the arcs bounding the profiles of adjacent P 4 have the centers of different vertices T at the respective bases. For a given full amount of the inner working chamber, the degree of compression and the maximum degree of compression, the distance between the caps 2 and 3, the length of the smallest base T and the radii of the arcs of the profile P 4 are related by a calculated ratio. Each P 4 contains two radial seals, the profile to-ryh coincides with a part of profile R 4. The working section of windows 13 has the shape of a curved triangle, the two sides of which are arcs that coincide with the limiting profile P 4 arc located within an obtuse angle at the top of T. The third side is formed by an arc of a circle centered on the axis of rotation P 4 and the tangent to the first two. The distance between the axes of rotation of adjacent P 4 to the length of the smallest base T is related to a certain ratio. 4 hp f-ly, 6 ill.

one

The invention relates to power plant engineering and, without structural changes, can be used both as a pump and as an engine.

The purpose of the invention is to simplify the design of the machine.

FIG. 1 shows a volumetric rotor machine at the time of maximum compression in the outer working chamber; in fig. 2 - the same section; in fig. 3 is a diagram of the relative position of the rotor profiles and the construction of the rotor profile; in fig. 4 - a window in the face spindle with a cap; in fig. 5 is a diagram for determining the location of windows on the end caps; in fig. 6 is a diagram for determining a window profile.

The machine includes a housing 1 in which four identical rotors 4 are located between two common face end caps 2 and 3, forming the inner 5 and outer 6 working chambers, the Rotors 4 are rigidly mounted on shafts 7, on which gears 8 are fixed,

associated with a common gear 9 mounted on the shaft 10. Each rotor 4 may contain two radial seals 11 located in its body

and 12, Rotors 4 are the same straight non-circular cylinders. . The profile of the rotor 4 is bounded by four arcs of circles GH, HE, EF and FG with centers, respectively, at the vertices A, B, C, D

an isosceles trapezoid ABCD, in which the lateral side is equal to the midline (Fig. 3)

15

| AB1 1CDI

| BC1 + IADI

The arcs FG and are NOT located within the angles ADC and ABC at opposite vertices D and Vau Trapezium. The arcs of GH and EF are located within the SAN and ECF angles, vertical, respectively, to the angles BAD and BCD with the other opposite vertices A and C of the trapezium. In this case, the arc GH and NOT, NOT

25 and EF, EF and FG, FG and GH with centers in

vertices with one steron trapezium congruence.

Given the full volume V ,, of the inner working chamber 5, the distance HI h between the end caps 2 and 3 and the compression ratio "Dl t values such that

 Vi- o.Ug - “- T / () + 4i () (s,) -2U (c, -l)

/

2h (U- n + V, f + co,)

de

20

a is the length of the smallest base of the trapezium;

D is the ratio of the length of the greatest base of the trapezoid to the value of a;

(W is the ratio of the length of the arc radius bounding the rotor profile and located within the angle, the vertical acute angle with a larger trapezium base to the value q; max is the highest degree of compression at a given value of C:

.and

F arccos

H

-0 + 1

the magnitude of the acute angle at the base of the trapezium.

The parameters U, V ,, V, cu, u) i are expressed in terms of the parameters (and C is used solely to simplify the recording of relations (2) - (4). Each rotor 4 may contain two radial seals 11 to 12 located in its body. The profile of each seal coincides with the part of the rotor profile 4, which includes one of the two circular arcs

 R

mlks I

(I)

f parameters are related by

Vo, h,

-muke

U,

and

. (2)

(3)

0

0

five

0

five

0

with centers at opposite vertices of the trapezium and located within angles, vertical angles at these vertices.

Dp of each rotor 4 in the end face 2 can be located muffled windows 13 connected to the input or output lines (not shown). The working section of each window 13 is a curvilinear triangle whose sides are arcs of circles intersecting two of which coincide with the limiting profile of the rotor 4 arc located within the obtuse angle at the apex of the trapezium, respectively, at the beginning and end of the bar, and the third centered on the axis rotor 4 concerns the first two. In the case when one of the first two sides of the triangle intersects segment 00 connecting the points O and O on the axes of rotation of this and adjacent rotors 4, the working section of the window 13 is limited to the part of the plane of the triangle located inside or outside the square with the vertices on the axes of rotation of the rotors 4 and outside the circle with a radius equal to the radius of the circumference circumscribed around the trapezium (Fig. 6). The center of this circle is located on segment 00 at a distance from point O equal to the radius of the arc bounding the profile of the rotor 4 and located within an angle, the vertical obtuse angle at the apex of the trapezium,

To ensure the opening of the window 13 in the inner working chamber 5 for the duration of the entire stroke, parameter C is related to the ratio d C + 2 | l of the distance between the rotation axes of adjacent rotors 4 and the length d of the smallest base of the trapezium by the inequality

d + l-vrd-1) -8 5 2 (d + 2)

4Arg -1

d + l + v (d-l) -8

2 (d + 2)

(five)

To increase the efficiency by increasing the working section of the windows 13 opposite each window 13, the same window 13 can be located in the opposite end cover 3, which is connected to the same highway.

To increase efficiency by reducing the leakage of the working fluids of the window 13 in the end caps 2 and 3 are arranged in such a way that the adjacent rotors 4 alternately open the windows 13 at intervals of one cycle, during which one window 13 is opened from the inside chambers 5 and external working chamber 6.

When specifying the parameters V ,, h, to (and satisfying relation (1) of value C and then calculating parameters using relations (3) - (4). | U and a, the rotor profile is completely determined. In this case, the lengths of the bases BC and AD trapezium are respectively equal

| Sun | a; (6)

(ADI i: a, (7)

the length of the sides of the trapezoid is

(AB (ICDI

f +1

(eight)

The length of the radius AG of the arc GH is equal to | AG | }Ha. The lengths of the radii of the remaining arcs are determined from the requirement of conjugation of the arcs with the centers at the vertices at one side of the trapezium.

IDFI IDGI IADI + IAGI (1; + p) a;

+ | Ka (9)

ICEI ICFI | DF | - (GDI () a t + l

-h-

+ (u) a;

(ten)

| BE |

IGEI + IBGI

+

+ a

(2

+ f. ) a;

+ f4) a + (11)

lAB a

il + l

p) a | U and n I AG I

(12)

0

15

20

25

Along the way, the IAGI obtained from pastora1 and the identity I of AN I II ensures the conjugation of adjacent arcs GH and NOT (the remaining adjacent arcs are conjugate by construction), i.e. provides the closedness and convexity of the border of the rotor profile 4. The axis of rotation of the rotor 4 passes through the center O of the circumference circumscribed around the trapezium ABCD. In this case, the arcs EE and GH, respectively, limit (if available) the profiles of the radial seals 11 and 12 (Fig. 1). The distance between the axes of rotation of the adjacent rotors 4 is equal to the sum of the length C-a of the largest base AD of the trapezium and twice the length | t (a of the radius AG of the arc GH located within the GAH angle vertical to the acute angle BAD Lf at this base

1004 1 10 01 (g + 2p) a.

The rotors 4 are installed in such a way that the corresponding sides of the trapeziums, the tops of which are the centers of the limiting profiles of the rotors 4 of the circular arcs, are parallel.

30 At the same time, the same arcs bounding the profiles of adjacent rotors 4 have different trapezoid vertices at their respective bases (for example, for rotor 4 with a rotation axis passing through g through point O, the arc EF has a vertex C at the base of the trapeze plane ABCD, and for the rotor 4 with the axis of rotation passing through the point, the corresponding arc has the center of the vertex B of the trapezoid with the same designation of the corresponding vertices of the trapezium. When combining parallel straight lines on which the same bases of the trapezium are located, The working chamber 5 occupies the largest volume (Fig. 1, trapezium not shown) or the smallest volume (Fig. 3); however, the volume change of the working chamber 5 from the largest value to the smallest is performed by rotating all the rotors 4 at an angle of 90 ° around the axes of rotation This rotation of the rotor system 4 corresponds to one cycle of the work process carried out in the machine. Each set

40

50

55

the values of the parameters of Ud, h, E-o correspond to a family of machines, and each machine from this family is completely determined (described) by specifying the satisfactory value (1) of the parameter. For the given parameters Ud, h, "and C, the parameters p and" are determined by the relations (3) and (4), the lengths of the sides of the trapezium are determined by the relations (6) - (8), the lengths of the radii

 arcs of circles bounding the rotor profile 4 are defined by relations (9) - (12).

In each end cap 2, MO-I may have up to four silenced windows 13 (one for each rotor 4) opening with corresponding rotors 4 in the inner working chamber 5 and up to twelve silenced windows 13 (three for each rotor 4) opening corresponding rotors 4 in the outer working chamber 6. Each window 13 can be connected by a connecting nipple located on the top 2 of the housing 1, with the input or output line or plugged. The window 13 is muffled in the face plate 2 (FIG. 4) and the input profile of which is made coincides with the window profile. The insert is inserted into window 13 through a connecting nipple (not shown) in

 face seal 2 and is fixed screwed onto the connecting

, choke plug. Two types of windows are used. FIG. Figures 5 and 6 show the positions of the rotor profile 4 at the beginning of the end of the stroke, differing in rotation around the rotation center O by 90. At the same time, the arc EN, bounding the profile of the rotor 4, is located within the obtuse angle of the unified social tax at the top of the trapezium C. is a curvilinear freckle MLM, two sides ML and ML of which intersect at point L and ML coincide with the arcs EH and EH of the rotor bounding profile 4. The third side mm of the triangle MLM is an arc of a circle with the center O on the axis of rotation of the rotor 4, tangent at the points M and M of the arcs EH and EH. In the case when one of the sides of a curvilinear triangle (Fig. 6, arc ML) intersects segment 00, connecting points O and O on the axes of rotation of this and adjacent rotors 4, the working section of window 13 is limited to the greater part of the plane of the triangle entirely inside either outside the square by the vertices on the axis of rotation of the adjacent rotors 4 (Fig. 3) and outside

the plane of the circle with the center on the segment

00, located at a distance of J 1

(- + p) a from point O, equal to the radius of the arc bounding the profile of the rotor 4 and located within an angle, vertical obtuse angle at. the top of the trapezoid.

Q The radius g of a circle is equal to the radius of the circle described around the trapezium. The triangle MLM is divided by the arc PI of a circle of radius r into two figures. In this case, a circle of radius r touches 5 from an arc of mm at point P and intersects one of the arcs ML or M L at point I. If point I is located on an arc ML not crossing the segment 00, then a curvilinear triangle is inserted in the working section of window 13 of the second type PIM In this case, the opening of window 13 occurs during part (albeit longer) of the takt time. If point I is located on the arc ML intersecting

5, segment 00, which is ensured by the inequality (5), then the working section of the window 13 of the second type is the curvilinear quadrangle PILM. In this case, opening the window

0 13 occurs during the entire tact. The presence of windows 13 of the second type is due to the inadmissibility of simultaneously opening the same window 13 in both chambers 5 and 6. Opening windows 13 of the second type occurs in the inner working chamber 5 if they are located inside a square with vertices on the axes of rotation of the rotors 4. Opening windows The first type occurs in the external working chamber 6. The utilized shape of the windows 13 ensures the maximum cross-section of their opening at any phase of the cycle. To increase this section across from each

5 windows. 13 in the opposite end cover 3 (FIGS. 1 and 2) the same window 13 can be located, connected to the same highway. The presence of a large number of windows 13 in the machine makes it impossible for them to switch to highways; moreover, the possibility of working in the inner 5 and outer 6 working chambers of various working processes introduces the requirement of exclusion

5 flow of working fluids between windows 13, opened in different chambers 5. And 6.

The versatile bulky rotary machine works like this.

five

ten

When the rotors rotate, the volumes of the working chambers 5 and 6 change from the highest to the lowest value. This change occurs when the rotors A are rotated by 90, which corresponds to one cycle of the working process. In the positions with the largest or smallest volume of the working chambers 5 and 6, all windows 13 are closed. At the same time, an increase in the volume of the internal working chamber 5 corresponds to a decrease in the volume of the external working chamber 6 and vice versa (the total volume of the working chambers 5 and 6 is constant). When changing the volumes of the working chambers 5 and 6, the opening of the windows 13 in the inner 5 and outer 6 working chambers occurs. The opening of the windows 13 when the rotors 4 rotate clockwise (counterclockwise) occurs when the volumes of the corresponding working chambers 5 and 6 decrease (increase). All machines of this family have the same values of the parameters Vg, ", h and differ only in the shape of the rotors 4, which is given by. At the same time, the graphs of the change in the degree of compression in the inner working chamber 5 and the angle of rotation of the rotor system 4 for the machines of this family practically coincide, from which the direct dependence of the main indicators of pa follows. The bochen process in the car is based on the shape of the rotor 6 (ie, on the value of C).

Claims (2)

1. A universal volumetric rotor machine, containing a case, mounted end caps with windows connected to inlet and outlet highways, four rotors with limited arcs located in the case of synchronized rotation of four arcs 15 20 a profile with a profile, so that: with the construction, the profile of the torus is formed by four cores with centers in the vertebral trapezium, whose side is equal to its average than two arcs with the centers of false vertices of the trapezium within the angles at the other two arcs from the center These opposite vertices are located within the pitched angles at these gi with centers at the apex of the trapezium side, the center described around the rifle is located on the rotor, and the distance of the adjacent rotors p of the longest bases and the doubled radius In a sharp acute angle, the rotors are located at a time that the identical stations are parallel, with arcs limiting n 30 rotors, they have trapezium centers at varieties. 2. The machine according to claim 1, such that the full internal volume of the unit is Ud, the degree of compression is the degree of compression, and the stand between the face length of the smallest base is 40 a and the radii of the arcs are profiled as follows:  Max w,  LOF 45 -i  Vi + V ((& a Va) + 4U (p-l) - (u.- o 2u (, l) and 50 „Vc. , l2h (Un + ViH -1d5,) where 2 is the ratio of the length of the greatest base of the trapezoid to the value of a; p is the ratio of the length of the arc radius limiting the rotor profile and located in the limits of the angle, the vertical acute angle with a larger OCHO-J trapezium, to the value of a; 2 -i. 2 Vi w, + 1 + and - V five 0 The profile is characterized by the following: in order to simplify the construction, the profile of each rotor is formed by four circular arcs with centers at the tops of an isosceles trapezium, whose side is equal to its center line, with two arcs with centers at opposite apexes of the trapezium located within the corners at these vertices, the remaining two arcs with centers at other opposite vertices of the trapezium are located within angles, vertical angles at these vertices, arcs with centers at the vertices at one side of the trapezium the center of the circle circumscribed around the trapezium is located on the axis of rotation of the rotor, and the distance between the axes of rotation of adjacent rotors is equal to the sum of the length of the largest base of the trapezium and the doubled length of the arc radius located within an angle vertical to at the base of this base, the rotors are arranged in such a way that the identical sides of the trapeziums are parallel, while the same arcs bounding the profiles of the adjacent 30 rotors have different tops of the trapezium centers at the respective bases. 2. The machine according to claim 1, characterized in that, given the full internal chamber size Od, compression ratio f and maximum compression ratio Wax, the distance between the end caps h, the length of the smallest base of the trapezium is 40a and the rotor profile arcs are related as follows:  Max w,  LOF l) - (u.- 2 -i. 2 + 1 + V l + d if Vi and - V w, , Fia.Z Fy 6