JP2002349448A - Biaxial rotary pump - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide high pressure and sucking force by using a piston having new shape and structure in a biaxial rotary pump system. SOLUTION: New shaped rotors 2, 3 are made to rotate in a casing, and two suction ports are disposed at particular positions on a side plate of the casing. A groove of the rotor and a discharge port and are disposed to overlap with each other when the pressure becomes high by sucking from the suction ports.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to the shape and structure of a rotary pump for compressing and suctioning air and fluid.

[0002]

2. Description of the Related Art A conventional two-shaft rotary pump having a rotation ratio of 2: 3 has a shape in which the shape of a piston of a three-part rotor has a cross section of a straight parallel line passing through the center point of the rotor. Met.

[0003]

However, according to the above prior art, not only is it not possible to cope with various uses but also the efficiency is not good. Therefore, the present invention can cope with various uses and has a more efficient structure. It is an object to provide a pump.

[0004]

In order to solve the above-mentioned problems, the invention according to claim 1 divides the shape cross section of two rotors in a casing into two equal parts and three equal parts so as to reduce a rotation ratio. ,
By rotating the gears in the opposite direction by a 3: 2 gear, suction is performed by a change in the pressure chamber due to the movement of the piston of the rotor, and is carried to the discharge port by rotation and discharged by meshing the rotor.

[0005] The shape of the piston of the three-part rotor is set at the intersection of the outer circumference of the two rotors, and the piston is in contact with the locus curve of a point on the outer circumference of the two-part rotor. Use a piston rotor that has a shape that is symmetrical about the center line with respect to the inside of the contact point of the line parallel to the center line.

Furthermore, in order to enable a two-shaft rotary pump having high pressure and suction power, a point on the circumference of a bisecting rotor starting from the intersection of the outer circumferences of the two rotors. A three-section rotor having a shape section from the intersection of the curves of the locus to the contact point, and a two-section rotor meshing with the rotor are used.

Further, a three-part rotor having a shape of a piston having a straight line outside and a line inside a straight line passing through the center point of the rotor in contact with the above-mentioned curve, and a two-part rotation meshing with the rotor By using the child, the production cost can be reduced.

Further, when the radius of the three-piece rotor is longer than 3/5 of the distance between the two axes, the inner angle and the outer angle of the two rotors are changed to a special shape having continuous contact points. I do.

Next, the positions of the holes of the two suction ports provided on the side surfaces of the casing are provided at the positions where the suction by opening and closing alternately by the rotational movement of the pistons of the two rotors and at the position where the drawing volume is the largest. Is preferred.

[0010] The fluid is discharged by the vicinity of the root of the pressure side piston of the three-part rotor or the overlap of the groove or hole provided on the piston surface with the hole provided on the side surface of the casing, and there is almost no residual fluid. It is good to provide as follows.

Further, a bypass is provided to connect the pressure chambers of the two rotors on which pressure is applied, so that when the two pressures merge, there is no pressure difference between the two pressure chambers, and the position and the size are as efficient as possible. It is preferable to set the height.

It is effective to reduce the production cost by forming a groove in the side wall of the casing or the casing side plate for the bypass.

In a conventional two-shaft rotary pump, the rotor of a piston having a center line or a parallel line having a center line or a parallel line has a large gap at a point where the two mesh with each other to release pressure. Put on the wings.

[0014]

FIG. 1 is an assembled perspective view of two rotors showing an embodiment of the present invention. The holes 12a and 12b of the casing side plates are provided with eleven outlets at positions where they alternately open and close by rotation of two rotors, suck fluid and compress by meshing, and overlap with the groove 11a of the rotor. .

The embodiment of FIG. 2 is a three-dimensional view of two rotors. The discharge port 11b of the rotor of three equal parts has a structure in which a hole is formed in the attachment part of the piston.

FIG. 3 is a side view of the shape of the rotor according to the first, second and third aspects, and is a curve Ya closer to the center point than a contact point Da with a curve Y of a trajectory that is in contact with a line f ″ parallel to the center line f. Is symmetrical with respect to the center line f.
The right side is characterized by the shape of the piston of the rotor according to the second aspect.

FIG. 4 is a perspective view of a side plate provided with a fluid suction port and a discharge port. The lower two hatched portions 12a and 12b are suction ports. This inlet 12
a and 12b are structures provided inside a portion surrounded by a solid line which is a position to be opened and closed by alternately rotating the rotor. The size, position and shape of the fluid discharge port 11 are determined within the range indicated by the solid line based on the pressure and flow rate of the fluid. In FIG. 4, the fluid discharge port 11 is located at a relatively high pressure.

FIG. 5 is a side sectional view of the rotor according to the first embodiment. p is the overlap angle from the horizontal center line to the intersection of the outer circumference. j is the angle between the point on the outer circumference of the piston of the trisection rotor and the inner circumference and the angle j
= P / 3, and similarly the rotor angle i = p / 2.

The angles u, v, w, and q are determined according to the respective applications while considering the balance between the two rotors, the size and strength of the pressure chamber, the suction force, the fluid, and the like. However, here the length of the radius of the two rotors is
The same shall apply.

FIG. 6 is a sectional view of the rotor according to the second embodiment. j '= j + s, i' = i + t, s = 2t
The following expression is the same as that of the first embodiment.

FIG. 7 is a sectional view of the rotor according to the third embodiment. The expression i ″ = 3j ″ / 2 is j ″: i ″ = 2: 3. FIGS. 5 to 7 show examples in which the radius of the two rotors is the same and the piston opening angle of the reference bisecting rotor is the same, and is merely a basic drawing in design.

FIG. 8 is a curve diagram of the locus of a point on the circumference of the rotor that is bisected at the intersection of the outer circumferences of the two rotors. R: L
The angle progression ratio is 3: 2, and the intersections of the line that separates R with the time line and the outer circumference of R are Ra to Ri. Then, draw a circle of L from each intersection, and define the length of each circle from the intersection of the circle with the same time as the line dividing L by the time line and the line at time 0 to La to Li.

Further, the points obtained by moving the points Ra to Ri in the opposite directions by La to Li are referred to as Pa to Ph, respectively.
5. The curve of the trajectory on the circumference of the rotor that is bisected at the intersection of the outer circumferences of the two rotors, where Y is a curved line that is the rotation of claim 1, 2, 3 or 4. This curve is used for all or part of the cross-sectional shape of the child piston.

FIG. 9 shows a curve of a locus of a locus of points on the outer circumference of the trisection rotor starting from the contact point between the inner circle of the bisector rotor and the outer circle of the trisection rotor. Ma to M are diagrams showing the design method.
7 is a curve connecting points where the lengths of Na to Ni are reversed in the same manner as in FIG. 7, and a curve X is from Ma to Qx.

FIG. 10- (1) is a diagram in which a curve X is drawn on a halving rotor and an angle 1.5 times the angle Ba is moved in the direction opposite to the rotation. (2), which is a sectional view of the shape of the piston of the minute rotor, starts from the position shown in the figure and rotates the respective rotors. The Z is the cross section of the shape of the piston of the equal rotor, and the figure is the location of the starting point for designing this Z.

FIGS. 11 (1) and 11 (2) are diagrams for designing the shape of a bisecting rotor according to the second aspect, and show a curve Y
FIG. 7 is a diagram in which a three-piece rotor having a cross section of the shape shown in FIG.

FIGS. 12 (1) and 12 (2) are diagrams for designing the shape of the halving rotor according to the third aspect, wherein the curve B
FIG. 4 is a diagram in which a three-section rotor having a cross section having the shape of FIG.

FIGS. 13 (1) and 13 (2) are diagrams for designing the shape of the halving rotor according to the fourth aspect, wherein the curve B
And FIG. 7 is a diagram in which a three-piece rotor having a cross section having the shape of Z and Z is rotated with a two-piece rotor, and a portion where the cross sections do not overlap is a two-piece rotor.

FIG. 14 is an overall cross-sectional view of the upper part, in which the power of the drive motor 8 is transmitted to the rotor side divided into three equal parts by the 13 belts, and the motors 6 and 7 are rotated in an interlocked manner at a rotation ratio of 2: 3. This is characterized in that the fluid entering from the inlet 12 is compressed and discharged by the rotation of the rotors 2 and 3.

FIG. 15- (1) is a side view of a rotor with a wing attached to the tip of the piston. (2) is a three-dimensional view in which the wings are attached in such a manner as to fit into the three grooves from the side.

FIG. 16- (1) is a three-dimensional view of the casing body, and e is a groove for bypass. (2) is a side view of the casing body and e is shorter than that of the three-dimensional view, but in both cases, the entrance of the bypass is closed by two rotors as much as possible.

[0032]

Since the present invention is configured as described above, it has the following effects.

The curve inside the contact point of the line parallel to the center line that is in contact with the curve of the trajectory of a point on the outer circumference of the two halves of the rotor starting from the intersection of the outer circumference of the two rotors is defined as By making the left and right symmetrical with respect to the center line, the airtightness can be enhanced because the curved portion overlaps the contact point when the two rotors mesh with each other.

The use of the curve of the trajectory of a point on the circumference of the bisecting rotor with the intersection of the outer circumferences of the two rotors as the starting point is the most wasteful use of the shape of the piston. Since a continuous force acts on the pressure chamber, a two-shaft rotary pump with particularly strong suction force and high pressure was made possible.

Next, by using a line consisting of a curve of an outer portion of a straight line passing through the center point of the rotor that is in contact with the curve of the above-mentioned trajectory and a portion of an inner portion of the contact point in the shape of a three-part piston, When the entrance and exit are set on the upper and lower surfaces of the casing body, the resistance is low and the shape is simple, so that the manufacturing cost is low and the durability is excellent.

When the radius of the three-part rotor is more than three-fifths of the distance between the center points of the two rotors, the rotary pump of the special-shaped rotor can increase the flow rate. Has the effect.

By setting the fluid suction holes within a limited range of two positions on the casing side plate, the two rotors are rotated and moved alternately at an efficient position to continuously open and close. Since suction is performed, a strong suction force is obtained.

By providing a fluid discharge hole in the casing side plate at a position overlapping the groove or hole dug around the root of the three pistons when the fluid is compressed most by the engagement of the two rotors. There is an effect that the pressure generated can be discharged almost without waste.

By providing a bypass connecting the two pressure chambers, it is possible to reduce the vibration that occurs when two pressures merge.

Further, by forming the bypass with a groove provided on the side surface of the casing body or the side surface of the casing side plate, it is effective in realizing low production cost.

The rotor has a structure in which a wing is attached to the tip of a parallel or straight rotor piston, so that the confidentiality is higher. The replacement of the wing is effective in maintaining high performance. is there.

[Brief description of the drawings]

FIG. 1 is an assembled perspective view of two rotors.

FIG. 2 is a three-dimensional view of two rotors.

FIG. 3 is a side view of the rotor according to the first embodiment;

FIG. 4 is a side view of an intake / exhaust-side casing side plate.

FIG. 5 is a side view of the rotor according to the second embodiment.

FIG. 6 is a side view of the rotor according to the third embodiment.

FIG. 7 is a side view of the rotor according to the fourth embodiment.

FIG. 8 is a rotor-side development view of a trisection curve of a locus of an intersection starting point of two rotors.

FIG. 9 is a development view on the rotor side bisecting a curve of a locus of a contact start point of two rotors.

FIG. 10 is a design method in which a curve X is set to a sectional shape of a bisector-side rotor.

FIG. 11 shows a method of designing a bisecting rotor according to the second embodiment.

FIG. 12 is a method for designing a bisecting rotor according to the third embodiment.

FIG. 13 is a method for designing a bisecting rotor according to the embodiment of claim 4;

FIG. 14 is a top sectional view of the entire assembly of the embodiment of the present invention.

FIG. 15 is a side view and a three-dimensional view of a wing of a piston of a rotor according to claim 9;

FIG. 16 is a three-dimensional view and a side view of a casing body according to the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Casing main body 2 Bisection rotor 2a Bisection rotor piston 3 Trisection rotor 3a Trisection rotor piston 4 Gear side casing 5 Suction discharge side casing side plate 6 Trisection Rotor side gear 7 Bisection rotor side gear 8 Drive motor 9 Bearing 10 Oil seal 11 Casing side plate side discharge port 11a, 11b Trisection rotor side discharge port 12a, 12b Suction port 13 Belt 14 Trisection Rotor piston wings.

Claims (9)

[Claims] 1. A shape cross section of two rotors having different shapes,
The two equal parts and the three equal parts are rotated in the opposite direction by a gear having a rotation ratio of 3: 2, so that the fluid sucked in from the inlet is carried to the vicinity of the outlet by each pressure chamber and the two rotors are rotated. The two-shaft rotary pump of the two-shaft rotary pump is characterized by a structure that discharges by meshing with the tangent to the curve of the trajectory of a point on the outer circumference of the bisecting rotor starting from the intersection of the outer circumferences of the two rotors A two-shaft rotary pump characterized by a three-segmented rotor having a curved cross-section in the shape of a curved section inside the point of contact of a line parallel to the center line with respect to the center line. 2. The distance between the center points of two rotors of a two-shaft rotary pump is at least 5/3 of the radius of a three-part rotor, and the starting point is the intersection of the outer circumferences of the two rotors. A three-piece rotor with a shape section from the intersection of the trajectory curves of points on the outer circumference of the two-piece rotor to the point of contact, a two-piece rotor meshing with the rotor, these two rotations 2. The shape of a child.
A two-shaft rotary pump as described. 3. The distance between the center points of two rotors of a two-shaft rotary pump is not less than 5/3 of the radius of a three-part rotor, and the starting point is an intersection point on the outer circumference of the two rotors. Trisection rotor that has a curved section inside and a straight section outside the center line contact point that touches the curve of a point locus on the circumference of the bisected rotor, and that rotor. Halves of the rotor that mesh with
2. The two-shaft rotary pump according to claim 1, wherein said two rotors are shaped. 4. The inner circle of the bisected rotor and the outer circle of the trisected rotor when the radius of the trisected rotor is longer than 3/5 of the distance between the center points of the two rotors. Rotor with a part of the curve of the trajectory of the point on the outer circumference of the trisection rotor starting from the contact point of which is improved to a cross section with a continuous contact point, meshing with the rotor 2. The two-shaft rotary pump according to claim 1, wherein the shape of the rotor is three. 5. A fluid suction hole is provided at two positions on the side surface of the casing side plate, and the hole is provided at a position where the two rotors alternately open and close so that fluid suction can be performed efficiently and alternately. The two-shaft rotary pump according to claim 1, wherein: 6. A groove which is provided at a position where a hole for discharging fluid is provided on a side surface of a casing side plate and a pressure is increased by engagement of two rotors, around a tang of three pistons of a three-part rotor. 2. The two-shaft rotary pump according to claim 1, wherein the high-pressure fluid is discharged by overlapping with the holes. 7. The two-shaft rotary pump according to claim 1, wherein the pressure chambers of the two rotors on which pressure is applied are connected by a bypass. 8. The two-shaft rotary pump according to claim 7, wherein the bypass connecting the pressure chambers of the two rotors on which pressure is applied has a structure in which a groove is provided on the side surface of the casing or the side plate of the casing side plate. 9. The tip of a two-shaft rotary pump in which the distance between the center points of the two rotors is 5/3 or more and the shape of the piston rotating in conjunction with a gear having a rotation ratio of 3: 2 is parallel or centerline. The two-shaft rotary pump according to claim 1, characterized in that the rotor is a three-piece rotor having a structure in which a detachable wing is attached to a part.