JPS6278488A - Rotary pump - Google Patents

Abstract

PURPOSE:To reduce sliding resistance by making the shape of a cylinder such that a distance between two points produced by contacts between the inner wall of the cylinder and both ends of a seal plate during rotation is always constant. CONSTITUTION:While air is sucked, compressed and sent forth from a valve port 23 to the outside with the rotation of a rotor 2, the shape of a cylinder is made ellipsoid so that during the rotation of the rotor 2 the total length of a seal plate 4 is kept constant. Also, since the seal plate is made of a single plate, a very natural and smooth sliding surfaces can be constituted so that nonuniform wear and sliding resistance on the sliding surfaces can be reduced.

Description

[Detailed Description of the Invention] Industrial Application Field The present invention applies to rotary mechanisms conventionally used as mechanisms for pressure pumps for gas or liquid, particularly those that combine a circular cylinder and a rotor. can be,
Furthermore, the number of seal grooves disposed on the rotor is limited to one.

Problems to be Solved by the Invention In a pump mechanism in which a perfect circular rotor is normally arranged eccentrically in a perfect circular cylinder, expansion and contraction of the seal plate occurs about 215 times the eccentric width, and this is followed by expansion and contraction of the seal plate. Therefore, it is necessary to divide the seal plate into two parts and make them stick out in the direction of the center of the circle. In this case, the minimum support length of each seal plate is inevitably shorter than the maximum protrusion length, and there is a fear that distortion may occur between the seal plate and the groove, causing uneven wear on the sliding surface.

Means for Solving the Problems The present invention was invented to compensate for these drawbacks, and consists of an elliptical cylinder and one cylinder that rotates while maintaining contact with the apex of the short axis on the cylinder. rotor and
A rotating machine consisting of a seal groove drilled perpendicularly to the rotor's is'ia, and a seal plate fitted into the seal groove and sliding in the centrifugal direction. , with the condition that the distance between the two points where both ends of the seal plate are in contact with the inner wall of the cylinder during rotation is always constant, and with a cylinder of a shape that satisfies this condition or a cylinder of a shape very similar to this. It consists of a rotary pump.

Function As described above in the present invention, while the rotor is rotating, the total length of the seal plate always remains constant as it rotates in contact with the wall surface, and since the seal plate [1] is real, the support of the seal plate is The length is approximately three times the protrusion length, reducing resistance and uneven wear on the sliding surface. Furthermore, since the centrifugal force generated on the seal plate is reduced, the sliding resistance generated between the cylinder and the seal plate is also reduced. Furthermore, by integrating the seal plate into one, the suction characteristics can be set to be large, which is useful for downsizing the entire pump.

Embodiments A case in which the present invention is applied to a near compressor will be described below with reference to the drawings.

In Figures 1 and 2, 1ri (i) is a circular cylinder, and the rotor 2 is installed in contact with a part of this inner wall.

Further, a seal plate 4 is fitted into the knoll groove 3 extending perpendicularly to the axis of the rotor 2, and contacts 5 and 5' are fitted at the tip of the seal plate 4, and leaf springs 6, 6 are fitted. ′ so that it is pushed outward. 7 is the shaft color,
The bolt 7' is fitted and tightened to the right end portion (FIG. 1) of the rotor 2, and a bearing 8 is fitted into the outer diameter portion of the bolt 7'.

A rotor shaft 9 is located on the left side of the rotor 2 (Fig. 1), and an oil seal shell 9' and a bearing 10 are mounted on the outer diameter of the rotor shaft 9.
, l O' is fitted, and a pulley 1 is fitted at the tip.
1 is tightened by the bold 13 while being stopped from rotating by the half-moon key 12.

Also, the Kri cylinder covers 14 and 15 on both sides of the cylinder 1 are fastened together by a number of bolts 16. Furthermore, a leg plate 17 is attached below the cylinder 1 by bolts 18 and 18'.

Now, as shown in FIG. 2, when the rotor 2 rotates in the direction of the arrow 19, a suction chamber 20Ki-tX is generated and air is sucked in the direction of the arrow 21 through the ventilation holes 22, 22',
22'. As the rotor continues to rotate further, the suction chamber gradually expands and reaches its maximum point as seen in the suction chamber 20' when the seal plate 4 reaches the state rc shown in FIG.

From this point on, the suction changes to a compression chamber, and as shown in the compression chamber 20' shown in FIG. thing, 2
6 is a discharge pipe, and an air supply pipe (not shown) is connected to the inner diameter portion. Reference numeral 27 denotes a suction pipe, which is tightened on the outer diameter part of the cylinder 1 by a ball 28, and connected to the inner diameter part Ktfl air supply pipe (not shown). 29 and 29' are ventilation holes provided in the seal plate 4, and serve to feed metal gas into the bottoms of the contacts 5 and 5' to push these contacts outward.

As described above, the air is sequentially sucked in and compressed by the rotation of the rotor 2, and then sent out through the valve port 23. What should be noted here is that the total length of the seal plate 4 should always be kept constant while the rotor 2 is rotating, and the cylinder should have an elliptical shape. Furthermore, since the seal plate 4 is made of a single plate, even when the seal plate is pushed out to its maximum extent, the support length is more than three times the length of the protrusion, and the sliding surface is extremely smooth. can be configured. Furthermore, the centrifugal force generated during rotation is almost canceled out,
A centrifugal force is generated by the difference in length divided by the rotor axis, and the seal plate 4? The centrifugal force is considerably smaller than that in the case of I-2, which has a great effect in reducing wear on the sliding parts. However, if you especially dislike changes in torque in air motors, etc.,
It is assumed that four seal plates are used in combination with the above-mentioned oval cylinder.

As described above, the present invention provides a highly efficient pump mechanism with an extremely simple structure.

Applications include near compressors and air motors,
Vacuum bongs and U-vacuum motors, g, body pumps and liquid motors, flow meters, inflow rocks, etc. can be considered.

Next, create an approximate diagram of the ellipse used in this example. Find the intersection point of the ellipse, draw a straight line extending from this intersection point to the eccentric point on the opposite side, use this as the radius, draw arcs B and C, and draw the center of the circle. Connect O to circle A with center. The ellipse created in this way becomes the desired ellipse.

(3) Next, when drawing a 7% circle that intersects and touches the diameter of the circle A mentioned above at right angles, this circle corresponds to the outer diameter of the rotor in this embodiment.

Furthermore, when actually machining the cylinder, a ring is made by copying with a master cam, broaching, sintering, molding, or the like, and then press-fitted into the main body, so that mass production can be performed.

Effects As mentioned earlier in the present invention, by giving the cylinder a specific elliptic curve, the total length of the seal plate can always be in contact with the wall surface of the cylinder at a constant length while the rotor is rotating, and the seal plate can be treated as one real piece. In addition, the support length can be set to about double the protrusion length, which is useful for downsizing the pump as a whole, and has industrial effects such as mass production.

[Brief explanation of drawings]

Figure 1 is a partially cutaway front view of the present invention, Figure 2 is rtg
FIG. 3 is a cross-sectional view taken along line Y--Y in FIG. In the figure, 1... Oval cylinder 2... Rotor 3... Seal groove 4... Seal plate 5.5'... Contactor 6.6... Leaf spring 7... Shaft collar 7' ... Bold 8 ... Bearing 9 ... Rotor shaft 10.10 ... Bearing 11 ... V pulley 12 ... Half-moon key 13 ... Bold 14.15 ... Cylinder cut -16...
Bold 17... Leg plate 18.18... Bold 19.21.24... Arrows 20, 20... Suction chamber 20'... Compression chamber 22.22', 22'... Intake hole 23 ... Valve port 23' ... Valve plate 26 ... l]j+field 27 ... Suction pipe 28 ... Bold 29.29' ... Vent hole 30, . 31... Eccentricity R 32... Center of cylinder

Claims (1)

[Claims] An elliptical cylinder, a rotor that rotates while maintaining contact with the apex of the minor diameter of this cylinder, a seal groove cut through the rotor's axis in a direction perpendicular to it, and a seal groove that fits into this seal groove. installed and slides in the centrifugal direction 1
It is a rotating mechanism consisting of two seal plates, and the condition is that the distance between the two points made by the two ends of the seal plate contacting the inner wall of the cylinder during rotation is always constant, and the shape is such that it satisfies this condition. A rotary pump comprising a cylinder or a cylinder having a shape very similar to the cylinder.