SU1555539A1 - Centrifugal pump - Google Patents

Abstract

The invention relates to centrifugal pump designs and is intended to increase the efficiency of axial unloading of the pump impeller. In operation, fluid from the sinus 6 through the channels 9 is injected into the discharge openings 8, carrying out a suction of fluid and thereby reducing the pressure in the central sinus 7. As a result, the axial unloading of the wheel is improved. 1 il.

Description

one

(21) 4228835 / 25-29

(22) 04/13/87

(46) 04/07/90. Bnsh. № 13

(75) I.K.Popov

(Bz) 621.671 (088.8)

(56) German Patent No. 518179,

cl. 59. L, pub. 1931.

USSR Author's Certificate No. 1323755, cl. F 04 D 29/04, 1986.

(54) CENTRIFUGAL PUMP

(57) The invention relates to centrifugal pump designs and is intended to increase the efficiency of axial unloading of the pump impeller. In operation, fluid from the sinus 6 through the channels 9 is injected into the discharge openings 8, carrying out a suction of fluid and thereby reducing the pressure in the central sinus 7. As a result, the axial unloading of the wheel is improved. 1 il.

cl

ate

ate

ate a joint venture

SAE

The invention relates to pump construction, namely, to designs of devices for axial unloading of the pump impeller.

The purpose of the invention is to increase the efficiency of axial unloading.

The drawing shows the design of the pump.

The pump includes a housing 1 and an installed JQ increases the efficiency of an axial impeller 2 spilled in it with a drive disk 3 having peripheral and central sealing areas 4 and 5, forming peripheral and central sinuses 6 and 7, while the central sinus 7 is connected with discharge openings mi 8 with a flowing part of the wheel 2.

In the drive disk 3, channels 9 are arranged at the center 5 of the peripheral sinus 6 at angles to the axis of the discharge openings 8, the input 10 of the channels 9 communicating with the peripheral sinus 6 and output 11 of the discharge openings 8.

The pump works as follows.

With increasing pressure behind the drive disk 3, the wheel 2 moves in the direction of suction. This leads to an increase in the gap between Sk 5 and Cor 15

20

25

Claims (2)

wheel loads 2. Formula of gaining thirty A centrifugal pump comprising a housing and an impeller mounted therein with a drive disk having peripheral and central sealing zones forming the peripheral and central sinuses, the central sinus being communicated with discharge openings with the flow-through part of the wheel, characterized in that to increase the efficiency of axial unloading, channels are arranged at an angle to the axis of the unloading holes in the drive disk near the central axis from the peripheral sinus side, the channel input communicating with the periphery the sinus and the exit are with discharge openings. By the use of 1. In the sinus 6, the pressure decreases, resulting in axial unloading. From the sinus 6, fluid under increased pressure is supplied through the channels 9 to the openings 8, thereby creating a leak that leads to an additional decrease in pressure in the central sinus 7. As a result The efficiency of axial unloading of the wheel 2 increases. The formula of gaining A centrifugal pump comprising a housing and an impeller mounted therein with a drive disk having peripheral and central sealing cords forming the peripheral and central sinuses, the central sinus being communicated with discharge openings with the flow-through part of the wheel, the efficiency of axial unloading, in the master disk at the central axis from the side of the peripheral sinus there are channels arranged at an angle to the axis of the discharge openings, with the channels input communicating with the periphery the serial sinus, and the outlet is with discharge openings.