JPS5819874B2 - rotary pump - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention rotates a circular cross-section rotor rotated by an appropriate power source within an outer fixed casing that also serves as an outer frame through a fluid pumping gap between the rotor and the fixed casing. This invention relates to a rotary pump that rotates a fluid pressure sender within a fluid pressure delivery gap to suck in liquid, etc., and force-feed it through the fluid pressure delivery gap to discharge it. This invention relates to a rotary pump that can continuously perform suction and discharge by changing the fluid pumping gap over time using an elastic solid rotor that is slidably inserted between the gaps.

Conventionally, in contrast to reciprocating pumps, so-called centrifugal pumps such as turbine pumps and centrifugal pumps have extremely wide ranges of rotational speeds, high and low, and require the installation of speed reducers and are complex in structure. There were drawbacks.

On the other hand, reciprocating pumps such as plunger pumps have the advantage that the discharge amount is constant regardless of the lift if the cycle is constant5, but they have a low rotation speed, are robust, are expensive, and have complicated valves. There was a disadvantage.

By combining the advantages of both of the above, various rotary pumps have been developed that do not require valves, have little pulsation on the discharge side, have a simple structure, can generate high pressure, and do not require a speed reducer. However, it still has the disadvantage of being a one-way process as a rotary reciprocating pump, and has the disadvantage of having to install an overload prevention device. The problem was that it lacked versatility.

The purpose of this invention is to solve the problems of various pumps based on the above-mentioned prior art as a technical problem, and to utilize the advantages of rotary type pumps to achieve pressure pumping in the fluid industry with an extremely simple structure that satisfies almost all conditions. The purpose is to provide an excellent loch pump that is useful for various fields of application.

In order to solve the above-mentioned problems, the structure of the present invention, which is based on the above-mentioned objects and has the gist of the above-mentioned claims, is to rotate a rotor with a circular cross section at a predetermined number of revolutions in an outer fixed casing, and to rotate the rotor and the fixed casing at a predetermined rotation speed. A solid roller-type elastic fluid pump inserted at a predetermined interval between the fluid pumping gaps between the fixed casing and By forming the side surface into a flat part between the suction port and the discharge port to form a narrow part, the fluid pumping element is deformed during transfer in the narrow part provided in at least one part of the fluid pumping gap, and the fluid pumping element is deformed during transfer, A technical measure has been taken in which the volume between the two is changed before and after the narrow part by moving the fluid pressure element, so that fluid can be continuously sucked in and discharged.

Next, embodiments of the present invention will be described below based on the drawings.

The embodiment shown in FIG. 1 is an embodiment that also serves as a principle diagram. Reference numeral 1 denotes an outer fixed casing, which also serves as an outer frame and is formed to a predetermined width. A rotor 2 with a circular cross section is provided concentrically through the
The rotor 2 is fixed by a key 5 to a rotation shaft 4 connected to a drive motor (not shown).

Incidentally, if necessary, the rotary shaft 4 may be provided with a speed reducer or a speed increaser.

The fluid pumping gap 3 is provided in a concentric annular shape as shown in the figure, but a part of the inner surface of the fixed casing 1 is formed into a flat part 6, and therefore only that part is formed in the direction of rotation. A narrow part 7 extends from the front part A1 and the rear part B to the central part C.

Therefore, the planar portion 6 may be a convex surface or a concave surface with a large radius within the range of design changes.

A suction pipe 8 is provided at the front end A1 and the rear end B of the narrow part r.
, and a discharge pipe 9 are screwed together.

10.10... is a solid, roller-type elastic pressure feeder, which is the same as the fluid pressure feed gap 3 that is in sliding contact with the inner surface of the fixed casing 1 and the outer surface of the rotor 2 in a sliding manner. It has a width.

In addition, each elastic pressure feeder 10 is made of rubber, as shown in FIG.
Alternatively, it may be a single piece made of elastic plastic, a composite body with an elastic metal ring 12 made of steel or the like on the outside and an elastic body 13 made of rubber or the like interposed inside, or a Teflon ring 14 on the outside.
, a composite tube with an elastic plastic 15 interposed inside, and various types of tubes can be adopted.
are formed protrudingly on both sides.

As shown in FIGS. 4 and 5, the rotation shaft 16 is rotated via an oil seal ring 18 in an annular structure 17 provided concentrically in correspondence with the fluid pumping gap 3 on both sides of the fixed casing 1. It is fitted into a freely loosely fitted retainer 19 via an oil seal 20.

A cover 21 is provided on the outside of the retainer 19 and is fixed to the fixed casing 1 with bolts 22.

In the above configuration, when the rotating shaft 4 is rotated by the drive motor, the rotor 3 rotates at high speed in the direction of the arrow in FIG. Type elastic fluid pressure feeder 10, 10・
... are maintained at a predetermined interval by a retainer 19, and rotate and revolve with the retainer 19 in the direction of the arrow in the fluid pumping gap 3, thereby increasing the volume between adjacent pumping elements 10 and 10. It moves while maintaining a constant state and while transporting liquid, which will be described later.

As the fluid pressure element 10 moves to the narrow part 7, it is compressed in the radial direction as it moves to the rear part B and the center part C, and as a result, it expands in the circumferential direction, and the distance between the fluid pressure element 10 and the pressure element 10 at the apse is compressed in the radial direction. The volume of will decrease as you move.

On the other hand, when it passes through the center C, the compression is released in the radial direction, so it expands, contracts in the circumferential direction, and gradually returns to a roll shape with a circular cross section.

Therefore, in this process, the volume between the front leg and the pressure feeder 10 increases as the front leg moves.

In this way, from the suction pipe 8 provided in front of the front end A of the narrow portion 7, a pressurized liquid such as slurry is sucked in by the negative pressure that increases the volume, while the discharge provided in the rear end BJ The liquid is discharged from the pipe 9 by increasing the pressure as the volume decreases, and in the process in between, the liquid is pumped out due to the constant volume between the adjacent pressure feeders 10 and 10.

In the embodiment shown in FIG. 1, there is only one suction pipe and one discharge pipe 91, but as in the embodiment shown in FIG. 1 more tube each
By providing one, it is possible to operate two machines with one equipment, and the discharge amount can be increased.

In addition, the occurrence of overload cavitation during operation is absorbed by the slip run of the recirculating element 2 to each pressure element 10, 10, etc., and the strain on one driving source does not spread, so that high-speed operation is possible. It becomes possible.

Roughly speaking, depending on the design, there may be two sets of suction and discharge pipes,
The capacity can be increased by increasing the number of narrow spaces.

According to this invention, a flat part is provided on the inner surface of the casing in a part of the fluid pumping gap provided in the fixed casing and the rotor, and a narrow part is provided in the fluid pumping gap provided in the fluid pumping gap. By rotating an elastic force transfer element with a circular cross section in the pressure gap, a change in volume occurs before and after the narrow part, and as a result, the suction pipe and discharge pipe provided before and after the pressure feed automatically The liquid will be inhaled and expelled.

Moreover, since the rotor and the pressure feeder are in sliding contact to enable slip run, the rotor can rotate at high speed, and as long as that is possible, there is no need for a reduction gear, and the discharge amount can be increased and the pressure can be increased.
An excellent effect is achieved in that one drive source is not overloaded.

Furthermore, it can be determined appropriately depending on the size of the aircraft and the scale of the design, making it more versatile, and depending on the model, the narrow area can be installed not only in one place but in two or more places. This has the effect of further improving performance.

Moreover, since the structure is simple, it is not only easy to manufacture, but also easy to maintain and repair, and there are few failures, which has great advantages in constant operation such as in Plan 1.

[Brief explanation of drawings]

The drawings show an embodiment of the invention, and FIG.
2 is a schematic side view of the pump, FIG. 3 is a perspective view of the pressure feeder, FIG. 4 is a partially enlarged sectional view showing the relationship between the pressure feeder and the retainer, and FIG. 5 6 is a sectional view of the same part, and FIG. 6 is a sectional view of another embodiment. 1... Outer fixed casing, 3... Fluid pumping gap, 2... Inner rotor, 10...
...Fluid pressure feeder, 11-15...Elastic body, 7.
γ...Narrow part, 6...Plane part, 8,8
'...Suction port, 9,9'...Discharge port.

Claims (1)

[Claims] 1. A rotary pump in which a plurality of elastic fluid pumps are disposed in a fluid pumping gap provided between an outer fixed casing and an inner rotor with a circular cross section and are movable by engaging with both the fixed casing and the rotor, The fluid pumping element is in sliding contact with the stationary casing and the rotor within the fluid pumping gap, and is constituted by a roller-shaped solid elastic body capable of orbiting around its axis, and has a narrow portion in a part of the fluid pumping gap. A rotary pump characterized in that a flat part forming a narrow part is formed on the inner surface of the fixed casing, and a suction port and a discharge port are provided before and after the narrow part.