JP3061451B2 - Swirl pump - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vortex pump, and more particularly to a vortex pump provided with a vacuum pump function, a gas-liquid mixing function, a foaming function, a liquid mixing function, and the like.

[0002]

2. Description of the Related Art Conventionally, for example, a water ring vacuum pump described in JIS B8323 is known as a pump having a vacuum pump function. This water-sealed vacuum pump has a structure in which makeup water is supplied into a casing, and an impeller rotates in the casing to suck air from a suction port and discharge the air to the atmosphere.

However, in this water-sealed vacuum pump, when the degree of vacuum used approaches the saturated vapor pressure of the make-up water temperature, severe noise due to cavitation is generated and the pump cannot be used. As a solution, noise is avoided by inserting an air ejector in front of a water-sealed vacuum pump to suck air.

Further, in the conventional pump, gas or liquid sucked from the suction port is recirculated from the discharge port to the suction port again from the gap between the partition part forming the blade fitting groove of the casing and the impeller, and There is a problem that the efficiency is reduced and the partition portion is worn by a fluid containing sludge.

Further, the conventional pump has a gas-liquid mixing function for mixing gas and liquid, a foaming function for mixing gas and liquid to form bubbles, and a liquid mixing function for mixing two or more types of liquids. There was no pump.

[0006]

In the pump having the above-mentioned conventional structure, when a vacuum pump function is obtained, there is a problem that noise is generated due to cavitation. Even if an air ejector or the like is provided in front of the pump, a high vacuum pump is required. It is difficult to operate quietly as much as possible, and the structure of a water-sealed vacuum pump is more complicated than a vortex pump, etc., and it is necessary to provide an air ejector etc. at the front stage of the pump. Have the problem of becoming expensive.

The conventional pump has a gas-liquid mixing function of mixing gas and liquid, a foaming function of mixing gas and liquid to form bubbles, and a liquid mixing function of mixing two or more types of liquids. There was no pump provided.

The present invention has been made in view of the above points, and has a vacuum pump function capable of performing a quiet operation up to a high degree of vacuum without requiring an air ejector and the like, and also provides a gas and a liquid. Gas-liquid mixing function to mix,
It also has a foaming function that mixes gas and liquid to form bubbles, a liquid mixing function that mixes two or more types of liquids, and the like, and allows the gas or liquid to be pumped up to recirculate from the discharge section to the suction side. Another object of the present invention is to provide a vortex pump in which a vacuum can be efficiently obtained, gas and liquid including sludge are prevented from being recirculated to a suction side through a partition, and the partition is not worn.

[0009]

According to a first aspect of the present invention, there is provided a vortex pump having an annular blade fitting groove, and an annular step-up passage communicating with a suction port and a discharge port on an outer periphery of the blade fitting groove. In a swirl pump having a casing and an impeller rotatably disposed in a blade fitting groove of the casing and rotatably moving in the pressure-raising passage, having an outer periphery thereof, a blade fitting groove of the casing is provided. A liquid injection port for injecting liquid into the blade fitting groove is provided at a position of the formed substantially annular partitioning section that partitions the suction port and the discharge port.

According to a second aspect of the present invention, there is provided a swirl pump having a casing having an annular blade fitting groove, and having an annular step-up passage communicating with a suction port and a discharge port on the outer periphery of the blade fitting groove. An impeller having rotatable blades rotatably disposed in the blade fitting groove and rotatably moving in the pressure-raising passage on the outer periphery thereof, a substantially annular partition forming the blade fitting groove of the casing. A passage for guiding the liquid injected inside the partition to the blade fitting groove at a position where the suction port and the discharge port of the section are partitioned.

[0011]

In the vortex pump according to the first aspect of the present invention, the gas or liquid sucked from the suction port by the rotation of the impeller is discharged from the discharge port. At this time, the gas or the liquid sucked from the suction port is not recirculated to the suction port again by the pressure of the liquid introduced from the injection port formed at the position separating the suction port and the discharge port. .

In the vortex pump according to the second aspect of the present invention, the liquid injected into the center of the partition forming the blade fitting groove of the casing is formed by the centrifugal force and pressure caused by the rotation of the impeller. It flows radially along the side surface and is discharged into the boosting passage through a gap between the impeller and the blade fitting groove, and the liquid discharged into the boosting passage is impeller and the boosting passage together with the gas or liquid sucked from the suction port. The liquid is discharged from the discharge port while being stirred by the vortex generated between the discharge ports.
At this time, the liquid injected to the center side of the partition is guided to a passage formed at a position separating the suction port and the discharge port, and the pressure of the liquid guided to this passage causes gas or liquid to return to the suction port. There is no recirculation. This means that the gas pump has the function of a high vacuum pump, and the liquid pump does not recirculate the sludge in the case of a liquid having sludge, and does not wear the partition. Also,
A vacuum pump function is obtained by sucking gas from the suction port and releasing it into the atmosphere, and a gas-liquid mixing function is obtained that sucks gas mixed with the liquid injected from the suction port and mixes the gas with the liquid. The foaming function of sucking gas from the suction port and agitating the gas and liquid to form bubbles is obtained, and the liquid to be mixed with the liquid injected from the suction port is mixed to mix two or more types of liquid. Liquid mixing function is obtained.

[0013]

Next, the structure of an embodiment of the present invention will be described with reference to FIGS. Casing 2 of vortex pump 1
Has a casing body 3 and a casing cover 5 airtightly fitted to an end surface of the casing body 3 via an O-ring 4.
A liquid injection space 6 is formed at the center inside the substantially annular partition 2a, and communicates with the liquid injection space 6 around the outer periphery of the liquid injection space 6 at the substantially annular partition 2a. An annular blade fitting groove 7 is formed, and an annular step-up passage 8 is formed in communication with the outer periphery of the blade fitting groove 7. A suction port 9 is formed to communicate with an inlet of the pressure-raising passage 8, and a discharge port 10 is formed to communicate with an outlet of the pressure-raising passage 8, and separates the suction port 9 and the discharge port 10 of the pressure-raising passage 8. Partition wall part 11 in position
The partition part 2a is formed so as to protrude.

Injection ports 14 and 15 for injecting a liquid into the partition 2a at a position separating the suction port 9 and the discharge port 10 face both inner surfaces of the casing body 3 and the casing cover 5, respectively. It is formed. An injection pump (not shown) communicating with an injection port (not shown) communicating with the injection space 6 at the center of the casing body 3 or the casing cover 5 is connected to an injection pump.

Reference numeral 21 denotes an impeller. The impeller 21 is rotatable in a boss portion 23 fitted and fixed to one end of a rotating shaft 22 that enters the liquid injection space 6 and in the blade fitting groove 7. And a plurality of through holes 25 penetrating on both sides on the center side of the disk portion 24, and a plurality of small blades on both outer peripheral sides of the disk portion 24. A blade groove 27 is provided between the small blade 26 and the small blade 26, and the small blade 26 and the blade groove 27 on the outer periphery of the disk portion 24 are rotatably moved in the pressure increasing passage 8. Although the impeller 21 has been described in terms of the double-blade structure in which the small blades 26 are formed on both sides, the impeller 21 may have a single-blade structure. Formed from one side from the forming side.

The rotating shaft 22 is rotatably supported on the casing main body 3 by a bearing seal mechanism (not shown) at one end intruding into the liquid injection space 6 and is liquid-tightly sealed. Not connected to the motor.

Next, the operation of this embodiment will be described. When the function of a vacuum pump is obtained by the vortex pump 1, the suction port 9 is communicated with the side of the vacuum device or the like that requires vacuum, and the discharge port 10 is opened to the atmosphere.
Is rotated and a liquid such as water is injected into the injection space 6 of the casing 2 by a separate injection pump.
Liquid is impeller by centrifugal force and pressure by rotation of 21
The air flows in the radial direction along the side surface of the blade 21 and is discharged into the boost passage 8 through the gap between the impeller 21 and the blade fitting groove 7. The liquid discharged into the pressurizing passage 8 is stirred by the vortex generated between each of the blade grooves 27 of the impeller 21 and the pressurizing passage 8 together with the gas sucked from the suction port 9, and the gas becomes small foam particles. And is discharged from the discharge port 10 together with the liquid. Therefore, a vacuum pump function is obtained in which gas is sucked from the suction port 9 and discharged from the discharge port 10.

At this time, the gas sucked from the suction port 9 is supplied to the partition 2a formed at a position separating the suction port 9 and the discharge port 10.
Is not recirculated to the suction port 9 again by the pressure of the liquid introduced into the blade fitting groove 7 from the liquid injection ports 14 and 15.

In the conventional water-sealed vacuum pump, noise due to cavitation is generated even at about 50 Torr when approaching the saturated vapor pressure of the replenisher. However, the vortex pump 1 has no noise due to cavitation due to its characteristics. Quiet operation is possible even at a degree of vacuum, and there is no need to provide an air ejector or the like to prevent generation of noise due to cavitation.

When the gas-liquid mixing function or the foaming function is obtained by the vortex pump 1, the gas to be mixed is sucked from the suction port 9 and the liquid to be mixed with the gas is injected into the injection space 6. Thus, the gas and the liquid can be stirred by the rotating impeller 21, and the gas and the liquid can be mixed and discharged from the discharge port 10. In addition, as a use method of this function, for example, gas can be extracted from the tank, mixed in gas-liquid, and used for water treatment, fermentation, and the like. Further, since the discharge pressure of the vortex pump 1 is high, the liquid in a gas-liquid mixed state discharged from the discharge port 10 can be pumped to a predetermined place. Also at this time, the gas sucked from the suction port 9 and the liquid mixed with this gas are separated by a partition formed at a position separating the suction port 9 and the discharge port 10.
The liquid is not recirculated to the suction port 9 again by the pressure of the liquid introduced into the blade fitting groove 7 from the liquid injection ports 14 and 15 of 2a.

When a liquid mixing function is obtained by the vortex pump 1, the liquid to be mixed is sucked from the suction port 9 and the liquid to be mixed with the liquid is injected into the injection space 6.
The two types of liquids can be agitated by the rotating impeller 21, mixed with the two types of liquid, and sent out from the discharge port 10. Also at this time, the liquid sucked from the suction port 9 and the liquid mixed with the liquid are supplied to the liquid inlet 1 of the partition 2a formed at a position separating the suction port 9 and the discharge port 10.
There is no recirculation to the suction port 9 again due to the pressure of the liquid introduced from 4 and 15. Also in this case, the liquid can be extracted from the tank or the like and mixed, or the mixed liquid can be pumped to a predetermined place.

Further, the liquid can be supplied to the suction port 9 without introducing the liquid into the liquid injection space 6. For example, a liquid injection port is formed by a conduit that protrudes into the suction port 9 and has a tip portion facing the inlet of the pressure increasing passage 8, and the liquid is injected into the impeller 21 through the liquid injection port. I do. Also in this case, a vacuum pump function, a gas-liquid mixing function, a foaming function, a liquid mixing function, and the like can be obtained as described above.

In the above-described embodiment, the liquid is injected using a liquid injection pump separate from the vortex pump 1. However, the liquid is injected by the liquid injection pump that is provided in parallel with the vortex pump 1. May be performed. This injection pump
The whirlpool pump 1 has a whirlpool pump structure like the whirlpool pump 1, and the impeller 21 of the vortex pump 1 and the impeller of the injection pump rotate integrally, sucking liquid from the suction port of the injection pump and discharging from the discharge port. Then, the liquid is injected into the injection space 6 of the vortex pump 1 through the conduit. The liquid injection pump is not limited to the vortex pump structure, but may be a centrifugal pump structure.

Next, the structure of another embodiment will be described with reference to FIGS.

In the structure of the above-described embodiment, the casing body 3 and the casing cover 5 are communicated with liquid inlets 14 and 15 formed on both inner side surfaces of the casing body 3 and the casing cover 5, respectively. A circumferential opening 30 is formed in the inner surface of the partition 2a along the outer peripheral edge facing the blade groove 27 of the impeller 21 toward the inner end suction portion 29 of the suction port 9 by notching. .

In the structure of this embodiment, the liquid having a pressure flows out of the opening 30 in the rotation direction of the impeller 21, and the performance of sucking gas or liquid from the suction port 9 can be improved.

In the structure of the embodiment shown in FIGS. 3 and 4, as shown in FIG. 5, the suction port 9 is formed in the upper part of the casing 2 so that the fluid flowing from the suction port 9 is further reduced. There is no collision with the liquid from the opening 30,
Fluid suction performance can be improved.

Next, the structure of another embodiment will be described with reference to FIGS.

In the structure of the above embodiment, the casing 2
A liquid injection port 1 for injecting a liquid into a position where the suction port 9 and the discharge port 10 of the substantially annular partition part 2a forming the blade fitting groove 7 are partitioned.
The liquid injection space 6 inside the substantially annular partition portion 2a which forms the blade fitting groove 7 of the casing 2 without providing the casing 4 and 15.
Liquid injection ports 16 and 17 are formed to guide the liquid injected into the partition 2a to a position where the suction port 9 and the discharge port 10 of the partition 2a are partitioned.

Further, in the structure of this embodiment, as shown in FIG. 8, the suction port 9 can be formed at the upper part.

Next, the operation of the embodiment shown in FIGS. 6, 7 and 8 will be described with reference to FIG.

The liquid a injected into the center of the partition 2a forming the blade fitting groove 7 of the casing 2 is subjected to centrifugal force and pressure caused by the rotation of the impeller 21 so that the liquid flows along the side surface of the impeller 21. The liquid flows in the radial direction and is discharged through the gap between the impeller 21 and the blade fitting groove 7 into the pressure increasing passage 8. A mixed fluid, for example, a gas-liquid mixture or a two-liquid mixture c is discharged from the discharge port 10 while being stirred by the vortex generated between the pressure rise passage 8. At this time, the liquid injected into the center side of the partition 2a is guided to a passage formed at a position separating the suction port 9 and the discharge port 10,
The liquid a injected into the injection space 6 on the center side of the partition 2a is filled with the injection port 1 formed at a position separating the suction port 9 and the discharge port 10.
Gas or liquid is not recirculated to the suction port 9 again due to the pressure of the liquid guided to the liquid injection ports 6 and 17 and the liquid injection ports 16 and 17.

With the structure shown in the above two embodiments, gas or liquid containing sludge is similarly discharged from the discharge port 10 side to the suction port 9.
Can be prevented from being recycled.

The configuration of this embodiment can be applied not only to a gas suction pump, a vacuum pump, a gas-liquid mixing pump, and a liquid mixing pump, but also to a self-priming vortex pump.

[0035]

According to the first aspect of the present invention, when the gas or liquid sucked from the suction port by the rotation of the impeller is discharged from the discharge port, the gas or liquid sucked from the suction port is discharged from the suction port. Due to the pressure of the liquid introduced from the liquid inlet formed at the position separating the outlet from the outlet, the liquid is not recirculated to the inlet again, and the pump efficiency can be increased.

According to the second aspect of the present invention, a vortex pump having characteristics such as no generation of noise due to cavitation is used, and the liquid is injected through the liquid inlet to the center side of the blade fitting groove of the casing of the vortex pump. Due to the liquid, the liquid flows radially along the side surface of the impeller due to the centrifugal force and pressure due to the rotation of the impeller, and is discharged into the pressurizing passage through the gap between the impeller and the blade fitting groove. The discharged liquid is discharged from the discharge port while being stirred by the vortex generated between the impeller and the pressure passage together with the gas or liquid sucked from the suction port, so that a high vacuum degree is not required without an air ejector or the like. It has a vacuum pump function that can perform quiet operation up to now, a gas-liquid mixing function that mixes gas and liquid, foaming that mixes gas and liquid to create bubbles In a vortex pump having a function of mixing two or more types of liquids, a liquid injected into the center of the partition is guided to a passage formed at a position separating the suction port and the discharge port. The gas or liquid sucked from the suction port by the pressure of the liquid led to this passage is not recirculated to the suction port again, and the efficiency of the vacuum pump can be increased.

[Brief description of the drawings]

FIG. 1 is a vertical sectional front view of a vortex pump showing one embodiment of the present invention.

FIG. 2 is a vertical side view of the vortex pump.

FIG. 3 is a vertical sectional front view of a vortex pump according to another embodiment of the present invention.

FIG. 4 is a vertical side view of the vortex pump.

FIG. 5 is a vertical sectional side view of a vortex pump showing another embodiment of the present invention.

FIG. 6 is a longitudinal sectional front view of a vortex pump showing another embodiment of the present invention.

FIG. 7 is a vertical sectional side view of the vortex pump.

FIG. 8 is an operation explanatory view of a vortex pump showing another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Vortex pump 2 Casing 2a Partition part 7 Blade fitting groove 8 Pressure passage 9 Suction port 10 Discharge port 14, 15, 16, 17 Liquid injection port 21 Impeller 26 Small blade

Claims (2)

(57) [Claims] 1. A casing having an annular blade fitting groove and an annular step-up passage communicating with a suction port and a discharge port on the outer periphery of the blade fitting groove, and rotatable in the blade fitting groove of the casing. A swirl pump having a small impeller provided on the outer periphery thereof and rotatably moving in the pressure increasing passage, wherein the suction port and the discharge port of the substantially annular partition part forming the blade fitting groove of the casing. A swirl pump provided with an injection port for injecting a liquid into the blade fitting groove at a position where the blade is separated. 2. A casing having an annular blade fitting groove and having an annular step-up passage communicating with a suction port and a discharge port on the outer periphery of the blade fitting groove, and rotatable in the blade fitting groove of the casing. A swirl pump having a small impeller provided on the outer periphery thereof and rotatably moving in the pressure increasing passage, wherein the suction port and the discharge port of the substantially annular partition part forming the blade fitting groove of the casing. A passage for guiding the liquid injected into the inside of the partition to the blade fitting groove at a position where the partition is formed.