JPH07233796A - Pump - Google Patents

Abstract

PURPOSE:To convey a liquid to a higher position without increasing the pump pressure, by providing a rotary shaft to which blades are installed in a multistage along the axial direction, in a tubular casing in which liquid lead-in ports are provided at the lower end, and a liquid exhaust port is provided at the upper end. CONSTITUTION:A pump 1 is composed of a tubular casing 2 in which liquid lead-in ports 3 are provided at the lower end, and a liquid exhaust port 4 is provided at the upper end; a rotary shaft 5 provided along the axial direction in the casing 2; two stages of blades 6 and 7 installed at specific parts of the rotary shaft 5; and a motor 8 to rotate the rotary shaft 5. The upper and the lower ends of the casing 2 are sealed by bearing lids 9 and 10, and the upper end bearing lid 9 consists of a bearing 9a and a seal 9b. The lead-in ports 3 are soaked in a liquid tank 11, and the liquid is led in to the casing 2 from the lead-in ports 3, the liquid is let flow to the upper side by rotating the lower side blade 6, and then it is energized again by the upper side blade 7 and conveyed to the higher position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pump suitable for conveying a liquid to a high place.

[0002]

2. Description of the Related Art Conventionally, centrifugal pumps such as centrifugal pumps have been mainly used to convey liquid.

[0003]

However, when the liquid is conveyed to a high place, that is, when the head difference is large, the centrifugal pump must be rotated at a high speed to increase the pressure. The liquid may leak and squirt from the connecting portion, and it is extremely dangerous if the high temperature liquid and the corrosive liquid leak and squirt. Therefore, when the liquid is transported to a high place by the centrifugal pump, it is necessary to strictly seal the connecting portion of the pump, which results in high cost.

[0004]

As a means for solving the above-mentioned conventional problems, the present invention is a cylindrical casing (2) having a liquid inlet (3) at the lower end and a liquid outlet (4) at the upper end. )
A rotary shaft (5) is provided inside the pump, and the rotary shaft (5) is provided with a pump (1) in which blade blades (6, 7) are mounted in multiple stages.

[0005]

[Operation] When the rotating shaft (5) in the casing (2) is rotated, the inlet blade is introduced into the casing (2) by the blade blades (6) in the lowermost stage.
The liquid introduced from (3) is urged upward. The biasing force weakens as the liquid flows upward due to an increase in the weight of the liquid and viscous resistance, but the liquid is further biased by the blade vanes (7) in the next stage. Thereafter, the liquid is conveyed upward by the multistage blades to a desired height and discharged from the discharge port (4). Therefore, the liquid which is urged by the vane blades (7) in the casing (2) and flows upward forms an axial flow that flows along the axis, and there is no pressure even when the liquid is conveyed to a high place.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described with reference to an embodiment shown in FIGS. 1 to 3. A pump (1) is a cylinder having a liquid inlet (3) at the lower end and a liquid outlet (4) at the upper end. Shaped casing
(2), a rotating shaft (5) provided in the casing (2) along the axial direction, and a two-stage blade blade (6, 6 attached to a predetermined portion of the rotating shaft (5). 7) and a motor (8) for rotating the rotating shaft (5), the upper and lower ends of the casing (2) are closed by the bearing lids (9, 10) of the rotating shaft (5), and the upper The bearing lid (9) consists of a bearing bearing (9A) and a seal (9B).

In the pump (1) having the above structure, the introduction port
(3) is immersed in the liquid tank (11), and the liquid (eg 90 ° C.) in the liquid tank (11) is introduced into the casing (2) through the inlet (3).
High temperature water), and the rotating shaft (5) by the motor (8)
Rotate the blades (6,7) via. The liquid in the casing (2) is urged by the rotation of the lower blades (6) as shown by the arrow to flow upward, and the liquid in the liquid tank (11) is successively transferred from the inlet (3) to the casing. (2) It is sucked inside.
The urging force of the lower blades (6) weakens as the liquid flows upward due to an increase in the weight of the liquid, viscous resistance, etc. Emitted from (4).

Other than this embodiment, the number of blade blade stages should be appropriately selected according to the difference in the head for fluid conveyance. Further, a plurality of blades may be connected in series in one stage. Generally, if the number of blade blades increases, the urging force for one stage increases, so the number of stages can be reduced, and if the head difference increases, the number of stations and / or the number of stages increases accordingly.

[0009]

Therefore, according to the present invention, the liquid can be conveyed to a high place without increasing the pressure of the pump, and the cost of the pump becomes low.

[Brief description of drawings]

 1 to 3 show an embodiment of the present invention.

[Fig. 1] Vertical sectional view

FIG. 2 is a perspective view

FIG. 3 is a perspective view of a blade portion

[Explanation of symbols]

 1 Pump 2 Casing 3 Inlet 4 Outlet 5 Rotating shaft 6 Lower blade blade 7 Upper blade blade

Claims (1)

[Claims] 1. A rotary shaft is provided along an axial direction in a cylindrical casing having a liquid inlet at a lower end and a liquid outlet at an upper end, and blade blades are attached to the rotary shaft in multiple stages. A pump characterized by