JPH1030581A - Rotary discharge pump - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce abrasion, reduce the frequency of repair, and improve operating efficiency by injecting gas in a carrying pipe extending direction to a carrying chamber formed vertically downward a rotor composing a plurality of rotor chambers by a plurality of rotor plates extended from a hollow shaft radially, a rotor wall, and a rotor cylinder. SOLUTION: In a rotor 8, four rotor plates 10 are arranged from a hollow shaft 9 radially, both ends of the rotor plates 10 are shield by two rotor walls, a rotor cylinder having a circular cross section is brought into contact with the outer periphery of four rotor plates 10, and an opening 13 is drilled between adjacent rotors 10, 10 in the rotor cylinder. Slurry fed from a carrying inlet 2 is carried from the opening 13 into each of rotor chambers A to D, it is transferred to a carrying chamber by rotation of the rotor, and air injected from an injection nozzle toward a carrying pipe direction in the carrying chamber is moved inside of the carrying pipe by its pressure. It is thus possible to ensure very large strength, reduce the friction so as to extend the life, and simplify maintenance.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary discharge pump, and more particularly to a structure for efficiently discharging a slurry or the like, which is discharged, to a downstream transfer pipe.

[0002]

2. Description of the Related Art The inventor has conventionally developed various rotary discharge pumps for discharging slurry and the like generated and settled on a shore. For example, Tokuhei 7-68943
As disclosed in Japanese Patent Application Laid-Open Publication No. H10-209, there is a configuration in which a rotor having blades rotates in a rotor chamber to transport slurry. In this configuration, by supplying air to the rotor chamber, foreign matters around the blade are removed, and at the same time, the specific gravity of the slurry is apparently reduced to improve the pumping ability of the pump.

In such a rotary discharge pump, the discharge capacity is determined by the number of revolutions and the torque of the rotor. However, when the slurry is heavy, the torque of the rotor is lost and the rotation speed becomes low. There is. In this case, there is a serious problem that not only the discharge capability is reduced but also the motor burns. In addition, when the rotor rotates in a watertight state in the rotor chamber and conveys sand or pebbles containing a large amount of high-hardness silicon or the like, the conveyed material is strongly rubbed against the rotor, the rotor shaft or the wall of the rotor chamber. Also, there is a problem that these are worn in a short time due to friction. In this case, not only must the members be replaced, but if the rotor chamber becomes worn, it must be overhauled and a new rotor introduced.
There is also the problem that high costs must be expected for regular repairs.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and the wear of the rotating parts and the parts in contact with the conveyed material is small, so that the frequency of repair can be drastically reduced and the operating efficiency can be reduced. It is an object to provide a rotary pump that can be increased.

In order to achieve the above object, a rotary pump according to the present invention comprises a hollow shaft, a plurality of rotor plates radially extending from the hollow shaft, and a rotor wall for shielding the rotor plate from both sides. A plurality of rotor chambers are constituted by a rotor cylinder in contact with the outer periphery of the rotor plate, and a rotor having an opening in the rotor cylinder corresponding to each of the rotor chambers is provided on one outer side of the rotor wall. While the inner gear is rotated by the driving gear, a transfer chamber is provided vertically below the rotor, a transfer pipe is extended from the transfer chamber, and gas is supplied to the transfer chamber in the direction in which the transfer pipe extends. The means of injecting is used.

[0006] In addition, the rotor uses a means that is pivotally supported by a fixed shaft penetrating the hollow shaft and its sleeve.

Further, as the lubrication system, the rotor is densely housed in a casing having an inlet above and a carry-out port below corresponding to the carry-in port, and lubricated in a gear chamber in which an inner gear and a drive gear are housed. Press the liquid in, and further into this gear chamber,
Means was used in which a gap between the hollow shaft and the sleeve was communicated with a thrust disc to lubricate the gap with the lubricating liquid via the thrust disc.

[0008] The rotor plate is configured to transport slurry and the like by configuring the number of rotor chambers corresponding to the number thereof, and is partitioned by the rotor plate, the rotor wall, and the rotor cylinder.
Further, slurry is supplied to each rotor chamber from a plurality of openings provided in the rotor cylinder, and is transported for each section. The slurry is directly connected to the transfer chamber provided directly below the rotor, and the slurry falls from the discharge hole to the transfer chamber by free fall,
accumulate. Gas is constantly or intermittently injected into the transfer chamber, and the slurry or the like deposited by the injection is sent to the transfer pipe. By these actions, the conveyed material such as the slurry put into the hopper is effectively sent out through the convey pipe.

As for the lubrication system, the drive system is lubricated by injecting a lubricating liquid such as water into the gear chamber. The thrust disk is opened according to the pressure, and the lubricating liquid further fills the gap between the hollow shaft and the sleeve. Will flow. And by this means, the friction generated between the hollow shaft and the sleeve is reduced.

[0010]

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. 1 and 2 show a main part of a rotary discharge pump according to the present invention. In the drawings, reference numeral 1 denotes a casing, 2 denotes a carry-in port provided at an upper portion of the casing 1, and further a hopper (FIG. (Not shown) or a transfer pipe to connect a conveyed material such as slurry. Reference numeral 3 denotes an introduction portion of the carry-in port 2, which has a cylindrical configuration in which a wall is vertically raised from the carry-in port 2. Reference numeral 4 denotes a carry-out port for a conveyed product,
A transfer chamber 5 is provided continuously below the carry-out port 4 vertically. Reference numeral 6 denotes a transfer pipe continuous with the transfer chamber 5, and reference numeral 7 denotes an injection nozzle for injecting air into the transfer chamber 5 in the traveling direction of the transfer pipe 6.

A rotor 8 is rotatably installed inside the casing 1.
And four rotor plates 10 provided radially from the hollow shaft, two rotor walls 11 that shield both ends of the rotor plate 10, and a circle in contact with the outer periphery of the four rotor plates 10. The rotor cylinder 12 has a cross section. An opening 13 corresponding to the size of the carry-in port 2 and the carry-out port 4 is formed between the adjacent rotor plates 10 in the rotor cylinder 12. In this embodiment, the number of the rotor plates is four, but the number of the rotor plates is not particularly limited as long as the strength can be guaranteed. A fixed shaft 14a and a hollow metal sleeve 14b fitted around the fixed shaft 14a are densely inserted into the hollow shaft 9, and the rotor 8 rotates around the fixed shaft 14a as an axis.

Next, the drive system of the rotor 8 will be described. Reference numeral 15 denotes an inner gear fixed to the outside of the one-side rotor wall 11 of the rotor 8, and 16 denotes a drive gear meshing with the inner gear 15 from the inside. The drive shaft of the motor is connected via a reduction gear (both not shown).
17 is a pin for fixing the inner gear 15 to the rotor wall 11. By doing so, the rotor 8
Can rotate stably around the metal sleeve 14b, and the number of teeth of the inner gear 15 can be set large, so that the driving torque of the motor can be sufficiently transmitted to the rotation of the rotor 8.

Next, the lubrication system according to the present embodiment will be described. Reference numeral 18 denotes a gear chamber in which the inner gear 15 and the drive gear 16 are housed, and are sealed by the casing 1 and the rotor wall 11. 19 is the casing 1 on the opposite side of the gear chamber 18
And a space closed by the rotor wall 11. And
The gear chamber 18 and the space 19 are formed by the sleeve 14b and the hollow shaft 9.
Are communicated with each other by a gap 20. 21 is a thrust disk provided between the gear chamber 18 and the gap 20;
When the pressure in the gear chamber 18 becomes high, the valve opens to move the fluid to the gap 20 side. Reference numeral 22 denotes a thrust disk provided between the gap 20 and the space 19. When the gap 20 becomes high in pressure, the valve opens to move the fluid toward the space 19.
In such a configuration, if pressurized water is injected and filled into the gear chamber 18, the water passes through the gap 20 via the thrust disk 21 and further into the space 19 via the thrust disk 22 according to the pressure. It enters and exits through a drain (not shown). Therefore, the lubrication and cooling of the drive system are efficiently performed by this configuration. Reference numerals 23 denote seals for reliably separating the inside of the rotor from the lubrication system.

According to this embodiment, the four rotor chambers A
Through the opening 13 of the rotor 8 is carried into each of the rotor chambers and is transferred to the transfer chamber 5 by rotation of the rotor. Since the air is jetted toward the transport pipe 6, the air moves in the transport pipe 6 by this pressure. On the other hand, the portions where friction occurs, such as the gear chamber 18 or the sleeve 14b and the hollow shaft 9, are constantly lubricated, so that they can rotate smoothly without seizing due to frictional heat. The relationship between the size of each of the rotor chambers A to D and the size of the opening 13 is not particularly limited,
It is preferable to make the opening 13 as large as possible as long as a portion required for the seal 23 can be secured and the strength of the rotor 2 can be guaranteed. That is, by making the opening 13 wider, the amount of slurry remaining in the rotor chamber is reduced, which contributes to efficient transport.

[0015]

According to the present invention, since the rotor is constituted by the hollow shaft, the rotor plate, the rotor wall and the rotor cylinder, a very large strength can be guaranteed as compared with the conventional vane type discharge pump. . In addition, the friction between the waste and the parts in the drive train has been reduced, so the life can be greatly extended compared with the conventional one, and daily maintenance can be simplified. Can be. Further, since the lubrication system is configured as a lubrication system in which the gear chamber and the shaft system are continuous, the configuration is simplified.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a pump according to the present invention.

FIG. 2 is a longitudinal sectional view of the same.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 casing 2 carry-in port 3 introduction section 4 carry-out port 5 transfer chamber 6 transfer pipe 7 injection nozzle 8 rotor 9 hollow shaft 10 rotor plate 11 rotor wall 12 rotor tube 13 opening 14a fixed shaft 14b metal sleeve 15 inner gear 16 drive gear 17 pin 18 Gear chamber 19 Space 20 Gap 21 Thrust disc 22 Thrust disc 23 Seal

Claims (3)

[Claims] A hollow shaft, a plurality of rotor plates radially extending from the hollow shaft, a rotor wall shielding the rotor plate from both sides, and a rotor cylinder in contact with the outer periphery of the rotor plate. A rotor having a rotor chamber and an opening in a rotor cylinder corresponding to each of the rotor chambers is rotated by an inner gear provided on one outer side of the rotor wall by a driving gear, while the rotor is vertically below the rotor. A rotary discharge pump, wherein a transfer chamber is provided in the transfer chamber, a transfer pipe is extended from the transfer chamber, and gas is injected into the transfer chamber in a direction in which the transfer pipe extends. 2. The rotary pump according to claim 1, wherein the rotor is pivotally supported by a fixed shaft passing through the hollow shaft and a sleeve thereof. 3. A rotor is provided at an inlet corresponding to a loading port.
A lubricating liquid is press-fitted into a gear chamber which is housed densely in a casing provided with a carry-out port below and in which an inner gear and a drive gear are housed, and further communicates this gear chamber with a gap between the hollow shaft and the sleeve by a thrust disk. The rotary pump according to claim 2, wherein the lubricating liquid is lubricated in the gap through the thrust disk.