JP2004278420A - Fluid pressure feed device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a highly accurate and highly versatile fluid pressure feed device for eliminating generation of frictional heat and dust. <P>SOLUTION: A conical projection part 6 is projected in a pump room 5 of a housing 3. A semicircular partition plate 12 is rockably fitted to a fitting groove 8 passing through the apex of the conical projection part 6. An inclined face 13c on the tip of a rotary shaft 13 is opposed in a noncontact state to an inclined disk 11 arranged in the pump room 5. The inclined disk 11 is brought into line contact with the conical projection part 6. An outer peripheral surface part is slidingly contacted with a spherical surface-shaped inner peripheral wall part 7 of the pump room 5. Torque is transmitted to the inclined disk 11 by using resiliency of a permanent magnet 17 by rotating the rotary shaft 13, and the inclined disk 11 is rocked in all directions in an inclined attitude with the apex of the conical projection part 6 as the center. The pump chamber 5 is partitioned into a plurality of volume variable fluid chambers by the inclined disk 11 and the partition plate 12 according to the inclined attitude of the inclined disk 11, and fluid is pressure fed. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an improvement in a fluid pumping device suitable for a pump, a blower, a compressor, a motor, and the like.
[0002]
[Prior art]
The present applicant has developed and applied for the following fluid pumping device. The configuration is such that a conical ridge is projected in the pump chamber of the housing, and a semicircular partition plate is fitted in a fitting groove passing through the apex of the conical ridge so as to be swingable in two directions, In addition, the inclined surface at the tip of the rotating shaft is brought into contact with the inclined disk disposed in the pump chamber to bring the inclined disk into line contact with the conical ridge, and the outer peripheral surface is formed into a spherical inner peripheral wall of the pump chamber. The inclined disk is slid in all directions around the apex of the conical raised portion in the inclined posture by rotating the rotation shaft, whereby the inclined disk is tilted in accordance with the inclined posture of the inclined disk. The pump chamber is partitioned into a plurality of variable-volume fluid chambers by the and the partition plate, and the fluid is pressure-fed (for example, see Patent Document 1).
[0003]
[Patent Document 1]
JP-A-2000-87885 (pages 3, 4; FIGS. 1, 7)
[0004]
[Problems to be solved by the invention]
However, in Patent Document 1 described above, since the rotational motion about the axis of the rotating shaft that rotates at high speed is converted into a swinging motion along the outer surface of the conical ridge of the inclined disk, sliding between the two occurs. The frictional heat generated by the contact causes the fluid to expand, leading to a reduction in the pumping efficiency.
[0005]
Also, when dust is generated due to abrasion of both members due to sliding contact, the sealing performance is reduced, and the operation is adversely affected by dust being caught, so that the vacuum pump which shortens product life and requires cleanliness is required. Is difficult to apply.
[0006]
The present invention has been made in view of such a point, and an object of the present invention is to provide a highly accurate and versatile fluid pumping device which eliminates generation of frictional heat and dust.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the present invention is characterized by devising the transmission of rotational force of a rotating shaft to an inclined disk.
[0008]
Specifically, the present invention provides a pump chamber formed by a conical ridge having a fitting groove formed to pass through the vertex, and a spherical inner peripheral wall surrounding the conical ridge centering on the vertex. And a housing disposed in the pump chamber, one side of which is in line contact with the conical ridge, and the outer peripheral surface of which is slidably in contact with the inner peripheral wall, the entirety of which is centered on the vertex of the conical ridge. The inclined disk swinging in the direction, and the fitting groove is fitted in the fitting groove so as to be able to swing in two directions about the vertex of the conical raised portion, and the inclined disk is tilted in accordance with the inclined posture of the inclined disk. A semi-circular partition plate that partitions the pump chamber into a plurality of variable-volume fluid chambers, and an inclined surface having the same inclination angle as the inclination angle of the conical raised portion; The inclined disk is conical raised by rotating around the axis while facing the other side. Intended for fluid pumping device that includes a rotary shaft to swing in all directions around the apex, it took solving means as follows.
[0009]
That is, according to the first aspect of the present invention, the rotational force of the rotating shaft is transmitted to the inclined disk by the rotational force transmitting means in a state where the inclined surface does not contact the inclined disk. It is characterized by.
[0010]
According to the first aspect of the present invention, the inclined disk swings in all directions around the apex of the conical ridge, thereby moving the line contact portion between the inclined disk and the conical ridge. In the fluid chamber on the direction side, the volume gradually decreases, and eventually becomes “0”. The fluid in the fluid chamber is discharged by this volume reduction. On the other hand, in the fluid chamber adjacent on the opposite side across the line contact portion, the volume gradually increases, and the fluid is sucked into the fluid chamber by this volume increase. As described above, the fluid is pumped by repeatedly increasing and decreasing the volume in the fluid chambers on both sides of the line contact portion.
[0011]
At this time, since the inclined surface of the rotating shaft and the inclined disk are not in contact with each other and do not make sliding contact, no frictional heat is generated between the two by sliding contact, and fluid expansion due to frictional heat is avoided and fluid Is efficiently pumped.
[0012]
In addition, since the inclined surface of the rotating shaft and the inclined disk do not slide on each other as described above, dust is not generated due to abrasion of both members, the sealing performance is improved, and there is no malfunction due to dust being caught and high accuracy. , The product life is prolonged, and application to vacuum pumps that require cleanliness becomes possible, increasing versatility.
[0013]
According to a second aspect of the present invention, in the first aspect of the invention, the rotational force transmitting means is a permanent magnet of the same polarity fixed to each of the inclined surface of the rotating shaft and the other side surface of the inclined disk. It is characterized by comprising.
[0014]
According to the above configuration, according to the second aspect of the invention, the inclined surface of the rotating shaft and the inclined disk can easily be brought into a non-contact state simply by fixing permanent magnets having the same polarity to each other.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0016]
1 to 4 show a fluid pumping device according to an embodiment of the present invention. This fluid pumping device includes a housing 3 including a lower housing component 1 and an upper housing component 2. Four screw holes 1a are formed at the upper peripheral edge of the lower housing component 1, and four through holes 2a penetrating vertically are formed at the peripheral edge of the upper housing component 2. The bolt 4 is inserted into the through hole 2a and screwed into the screw hole 1a in a state where the lower housing component 1 and the upper housing component 2 are butted up and down so that the screw hole 1a and the through hole 2a correspond to each other. By doing so, the lower housing constituent member 1 and the upper housing constituent member 2 are integrally combined to form the housing 3 in which the pump chamber 5 is formed.
[0017]
The pump chamber 5 is formed from a conical ridge 6 protruding from the lower housing component 1 to the upper housing component 2 and from the entire periphery of the base end of the conical ridge 6 to the upper housing component 2. The inner peripheral wall 7 is formed in a spherical shape with the vertex of the conical ridge 6 as a center. On the other hand, a slit-shaped fitting groove 8 is formed in the conical ridge 6 so as to pass through the vertex thereof, and the bottom surface of the fitting groove 8 has a semi-circular shape with the same curvature as that of the inner peripheral wall 7. It is formed to bisect the conical ridge 6. Further, two fluid suction ports 9 and two fluid discharge ports 10 are formed on both sides of the fitting groove 8 of the conical ridge 6 so as to be located on diagonal lines.
[0018]
An inclined disk 11 is disposed in the pump chamber 5. The inclined disk 11 has one side surface (lower surface) in line contact with the conical ridge 6 by a rotating shaft 13 to be described later, and a conical ridge with an inclined posture in which the outer peripheral surface is in sliding contact with the inner peripheral wall 7. It swings in all directions around the apex of No. 6. The line contact portion is denoted by reference numeral C.
[0019]
A semicircular partition plate 12 is fitted into the fitting groove 8 of the conical ridge 6 so that the semicircular portion 12a can be turned downward and swinged in two directions about the vertex of the conical ridge 6. Have been. The chord portion 12b of the partition plate 12 comes into contact with the lower surface of the inclined disk 11, and the pump chamber 5 is divided into two or three volumes by the inclined disk 11 according to the inclined posture of the inclined disk 11. The fluid chambers A, B, (A1, A2, B), and (A, B1, B2) are partitioned (see FIGS. 3 and 5).
[0020]
A shaft hole 2b is formed in the center of the upper surface of the upper housing component 2 in the vertical direction. A shaft portion 13a of the rotating shaft 13 is rotatable in the shaft hole 2b via a thrust bearing 14 and a radial bearing 15. It is inserted and arranged. A large diameter portion 13b is integrally formed at the lower end of the shaft portion 13a of the rotating shaft 13, and the lower end of the large diameter portion 13b is formed on an inclined surface 13c having the same inclination angle as the inclination angle of the conical ridge 6. The inclined surface 13c maintains the inclined posture of the inclined disk 11. An O-ring 16 is interposed between the large-diameter portion 13b and the upper housing component 2 in order to ensure sealing.
[0021]
On each of the inclined surface 13c of the rotating shaft 13 and the other side surface portion (upper surface portion) of the inclined disc 11, a permanent magnet 17 of the same polarity (positive in FIGS. The rotating force of the rotating shaft 13 is fixed, and the inclined surface 13c faces the upper surface of the inclined disk 11, and the inclined surface 13c is moved by using the repulsive force of the magnetic force of the permanent magnet 17. Is transmitted to the inclined disk 11 in a state where the inclined disk 11 is not brought into contact with the upper surface of the conical ridge 6. The rotational force transmitting means is not limited to the permanent magnet 17 as long as it can transmit the rotational force of the rotating shaft 13 to the inclined disk 11 in a non-contact manner. For example, a repulsive force by electric energy, or spraying by gas or liquid is used. Pressure or the like may be used.
[0022]
Therefore, when the rotating shaft 13 is rotated clockwise or counterclockwise, the inclined disk 11 held in the inclined position by the inclined surface 13c of the rotating shaft 13 is moved in the inclined direction (the inclined disk 11 and the conical bulge). The moving direction of the line contact portion C with the part 6) sequentially moves at the same speed. At this time, since the center of the pump chamber 5 and the apex of the conical ridge 6 coincide with each other, and the lower surface of the inclined disk 11 and the chord 12b of the partition plate 12 coincide with each other at the coincident point, Regardless of the direction in which the disk 11 is inclined, the chords 12b of the partition plate 12 are in close contact with the lower surface of the inclined disk 11 so as to reliably seal the fluid. The chord portion 12b of the partition plate 12 is horizontal in the state of FIG. 1 which is orthogonal to the inclination direction of the inclined disk 11, but is horizontal in the state of FIG. It tilts with the tilting disk 11. That is, when the inclination direction of the inclined disk 11 sequentially moves according to the rotation of the rotary shaft 13, the partition plate 12 also inclines from horizontal to left (right), one of both ends of the chord portion 12b is at the top dead center, and the other is at the bottom dead center. After reaching the point, it returns to horizontal again and swings in a seesaw shape so as to start tilting right (left) from the horizontal position. The two fluid chambers A and B separated by the partition plate 12 respectively have a line contact portion C between the conical ridge 6 and the inclined disk 11, and a chord portion 12b of the partition plate 12 contacting the inclined disk 11. And a closed space surrounded by In addition, in these two fluid chambers A and B, the position of the chord portion 12b of the partition plate 12 is constant, so that the movement from the line contact portion C changes from the maximum to the minimum "0". During this time, the volume of the fluid chamber A increases and decreases to two fluid chambers A1 and A2, and the volume of the fluid chamber B increases and decreases to two fluid chambers B1 and B2. Then, the fluid flowing from the fluid suction port 9 due to the movement of the inclined disk 11 in the tilt direction is gradually collected at the fluid discharge port 10 and discharged from the fluid discharge port 10 vigorously. The distinction between the fluid inlet 9 and the fluid outlet 10 is determined by the direction of movement of the inclined disk 11 in the direction of inclination. When the direction of movement is reversed, the fluid inlet is the fluid outlet and the fluid outlet is the fluid outlet. Changed to fluid inlet.
[0023]
At this time, the inclined surface 13c of the rotating shaft 13 and the inclined disk 11 are kept in a non-contact state by the repulsive force of the permanent magnet 15 so that the inclined surface 13c and the inclined disk 11 do not slide. Friction heat due to sliding contact between the two can be prevented from being generated, and fluid expansion due to frictional heat can be avoided and fluid can be efficiently pumped.
[0024]
Further, as described above, since the inclined surface 13c of the rotating shaft 13 and the inclined disk 11 are not in sliding contact with each other, dust is not generated due to abrasion of both members, so that the sealing property can be improved, and furthermore, the dust can be removed. It is possible to eliminate malfunctions caused by biting, to extend the life of the product with high accuracy and to extend the versatility by applying to a vacuum pump requiring cleanliness.
[0025]
Further, since it is only necessary to fix the permanent magnets 15 to the inclined surface 13c of the rotating shaft 13 and the inclined disk 11, respectively, the above-described effects can be easily obtained.
[0026]
Next, the operation of the fluid pumping device configured as described above will be described with reference to the operation process diagrams of FIGS.
[0027]
<(A) process>
The chord portion 12b of the partition plate 12 which is in contact with the inclined disk 11 is in the 90 ° to 270 ° direction, and the line contact portion C between the conical raised portion 6 and the inclined disk 11 is in the 0 ° direction. In this state, the inside of the fluid chamber A is divided into two fluid chambers A1 and A2 with the line contact portion C as a boundary. On the other hand, the fluid chamber B occupies a large volume because the inclined disk 11 does not contact the conical ridge 6. In order to clarify this state, the fluid existing in the fluid chamber A1 is indicated by a circle, and the fluid existing in the fluid chamber A2 is indicated by a triangle.
[0028]
<Step (b)>
(A) shows a state in which the line contact portion C has been moved counterclockwise by 30 ° starting from the state of the process. In this state, the volume of the fluid chamber A2 is reduced and the internal fluid is discharged from the fluid discharge port 10, and the volume of the fluid chamber A1 is increased by that amount and the fluid is sucked from the fluid suction port 9. It can be seen from the increase or decrease in the number of △ and ○ marks.
[0029]
<(C) process>
This shows a state where the line contact portion C has further moved counterclockwise to a position of 80 °. In this state, the volume of the fluid chamber A2 is further narrowed, and the internal fluid is continuously discharged from the fluid discharge port 10. On the other hand, the volume of the fluid chamber A1 is further increased and the suction of the fluid is continued.
[0030]
<(D) process>
The line contact portion C further moves to reach the position of 90 °, and shows a state where the line contact portion C overlaps the chord portion 12b of the partition plate 12. In this state, all of the fluid indicated by the triangle marked in the fluid chamber A2 is discharged from the fluid discharge port 10, and the fluid chamber A (A1) is occupied by the fluid marked with the circle. On the other hand, in (a) to (d) above, fluid is not sucked and discharged in the fluid chamber B, and the fluid chamber B is kept occupied by one fluid indicated by hatching.
[0031]
<(E) process>
The line contact portion C reaches a position of 120 °, and the inside of the fluid chamber B is divided into a fluid chamber B1 and a fluid chamber B2 with the line contact portion C as a boundary, and a new fluid indicated by ◎ is placed in the fluid chamber B1. While being sucked from the fluid suction port 9, the fluid chamber B2 becomes narrower by the volume of the fluid chamber B1, and the fluid indicated by hatching is discharged from the fluid discharge port 10 by that amount.
[0032]
<(F) process>
The state where the line contact portion C has further moved counterclockwise to a position of 150 ° is shown. In this state, the volume of the fluid chamber B1 further increases and the internal fluid continues to be sucked from the fluid suction port 9, while the volume of the fluid chamber B2 further decreases and the discharge of the fluid continues.
[0033]
<(G) process>
This shows a state in which the line contact portion C reaches the position of 180 °, and the inside of the fluid chamber B is equally divided into the fluid chamber B1 marked with ◎ and the fluid chamber B2 hatched.
[0034]
<(H) process>
The state where the line contact portion C has further moved counterclockwise to a position of 240 ° is shown. In this state, in the fluid chamber B1, the volume is further increased, and a new fluid indicated by ◎ is sucked from the fluid suction port 9, and in the fluid chamber B2, the volume is continuously decreased and the fluid indicated by hatching is changed. It is discharged from the discharge port 10.
[0035]
<(I) Step>
The state where the line contact portion C further moves to reach the position of 270 ° and overlaps the chord portion 12b of the partition plate 12 is shown. In this state, the hatched fluid existing in the fluid chamber B2 is entirely discharged from the fluid discharge port 10, and the fluid chamber B (B1) is occupied by the fluid indicated by ◎. On the other hand, in the above (d) to (i), the fluid is not sucked or discharged in the fluid chamber A, and the fluid chamber A is kept occupied by one fluid indicated by a circle.
[0036]
【The invention's effect】
As described above, according to the invention of claim 1, a state in which the inclined surface of the rotary shaft is opposed to the inclined disk that partitions the pump chamber into a plurality of variable volume fluid chambers with the partition plate in a non-contact state. Therefore, the rotational force of the rotating shaft is transmitted to the inclined disk by the rotational force transmitting means, so that a reduction in pumping efficiency and a decrease in sealing performance due to frictional heat and abrasion, as well as a malfunction are eliminated. It is possible to provide a fluid pumping device that is accurate and has a long service life, and can be applied to a vacuum pump that requires cleanliness by eliminating the entrapment of dust, thereby expanding versatility.
[0037]
According to the second aspect of the present invention, the function and effect described in the first aspect can be easily achieved only by fixing the permanent magnet having the same polarity to the inclined surface and the inclined disk of the rotating shaft.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view showing a relationship between an inclined plate and a conical ridge in a fluid pumping device according to an embodiment of the present invention.
FIG. 2 is a longitudinal sectional view showing a relationship between an inclined plate and a partition plate in the fluid pumping device according to the embodiment of the present invention.
FIG. 3 is a plan view of a lower housing component in the fluid pumping device according to the embodiment of the present invention.
FIG. 4 is an exploded perspective view of the fluid pumping device according to the embodiment of the present invention.
FIG. 5 is an explanatory diagram of the operation of the fluid pumping device according to the embodiment of the present invention.
[Explanation of symbols]
3 Housing 5 Pump chamber 6 Conical ridge 7 Inner peripheral wall 8 Fitting groove 11 Inclined disk 12 Partition plate 13 Rotary shaft 13c Inclined surface 17 Permanent magnet (rotational force transmitting means)
A, A1, A2 Fluid chamber B, B1, B2 Fluid chamber C Line contact part

Claims (2)

A housing having a pump chamber formed by a conical ridge in which a fitting groove is formed so as to pass through the vertex, and a spherical inner peripheral wall surrounding the conical ridge centering on the vertex;
The conical ridge is arranged in the pump chamber, and one side surface is in line contact with the conical ridge, and the outer peripheral surface is slid in all directions around the apex of the conical ridge in an inclined posture in sliding contact with the inner peripheral wall. An inclined disk,
The pump chamber is fitted into the fitting groove so as to be able to swing in two directions about the vertex of the conical ridge, and the pump chamber is made into a plurality of variable volumes with the inclined disk according to the inclined posture of the inclined disk. A semicircular partition plate for partitioning into a fluid chamber,
It has an inclined surface having the same inclination angle as the inclined angle of the conical raised portion, and the inclined disk faces the other side surface of the inclined disk and is rotated around an axis so that the inclined disk has a conical raised portion. A fluid pumping device comprising a rotating shaft that swings in all directions around a vertex,
A fluid pumping device characterized in that the rotational force of the rotating shaft is transmitted to the inclined disk by a rotational force transmitting means in a state where the inclined surface is not brought into contact with the inclined disk. The fluid pumping device according to claim 1,
A fluid pumping device characterized in that the torque transmitting means is constituted by permanent magnets of the same polarity fixed to each of the inclined surface of the rotating shaft and the other side surface of the inclined disc.

Images