RU191329U1 - VERTICAL VANE PUMP PUMPING THE WORKING ENVIRONMENT FROM THE RESERVOIR - Google Patents

Abstract

The utility model relates to vertical vane pumps and can be used to create centrifugal or screw centrifugal pumps for pumping working fluids such as liquefied gas, oil and contaminated liquid working fluids from tanks, containers, and storage tanks to the consumer. The vertical pump for pumping the working fluid contains a base plate 1, on which the shaft 2 of the pump is fixed. A shaft 4 with impeller wheels 5 mounted on the shaft is mounted inside the shaft line of the bearings 3. The wheels can be in the form of a screw 5 and subsequent centrifugal wheels (the latter are not shown). The impellers are located in the pump casing 6, connected to the supply casing 7 in the form of a flange with a funnel. The shaft 4 is elongated so that a disk 8 is mounted on it, located below the level of the supply casing 7. The disk 8 is covered by a bowl-shaped casing 9, which with ribs 10 is rigidly fixed to the supply case 7. Between the disk 8 and the cup-shaped body 9, a radial gap seal 11 is formed in the form of an annular gap (the simplest seal). The cavity 12 between the disk and the cup-shaped body 9 is connected using a tube 13 (or several t cutting) with a high-pressure cavity of pump 14. Through the pipe 15, the pumped medium 16 enters the consumer. The working medium 16, flowing around the ribs 10, enters the inlet casing 7 and then into the pump casing 6, and the cavity 14, from where it enters the consumer through the pipe 15 and through the channel 13 in the form of a tube enters the bowl-shaped body 9 and acts on the disk 8, creates a force S acting upward - that is, it perceives the weight of the shaft 4, wheels 5 (or several wheels), as well as hydraulic forces acting on the shaft mounted 4 wheels. As a result, the load on the bearings decreases and their service life increases. f-ly, 1 ill.

Description

The utility model relates to vertical vane pumps and can be used to create centrifugal or screw centrifugal pumps for pumping working fluids such as liquefied gas, oil and contaminated liquid working media from tanks, containers, and storage facilities to the consumer.

A centrifugal vertical pump is known with a flowing part immersed in the pumped medium, comprising a motor, a shaft line formed by one or more suspensions, a flowing part formed by an impeller located in the pump casing and an inlet and outlet housing (see, for example, utility model patent No. 78534, IPC F04D 7/04).

The pump bearings are loaded with axial force from the weight of the shaft, impeller wheels and hydraulic forces acting on the impeller wheels - which forces the use of large-sized expensive bearings with a high coefficient of performance and reduces bearing life. The placement of devices for unloading bearings directly in the pump housing or in the shaft line would significantly complicate the design of the pump itself.

A disadvantage of the known pump is that the bearings of the pump are not unloaded from the action of axial forces, such as the force of the weight of the shaft and impellers, which reduce the service life of the bearings and force the use of expensive thrust rolling bearings, especially if the pump is multi-stage.

The purpose of the utility model is to increase the service life of bearings without significantly complicating the design of the pump.

This goal is achieved by the fact that the pump shaft is elongated so that a disk is installed on the pump shaft below the level of the inlet casing, a cup-shaped casing enclosing the disk with the formation of an annular seal is rigidly fixed below the level of the disk on the inlet casing, and the cavity between the cup-shaped casing and the disk is in communication with the cavity high pressure pump housing.

The annular seal between the disk is made in the form of a radial slotted gap connecting the cavity between the cup-shaped body and the disk with the reservoir.

The drawing shows a section of the proposed pump, where:

1 - base plate

2 - shaft shaft

3 - bearing

4 - shaft

5 - impeller

6 - pump housing

7 - supply housing

8 - disk

9 - bowl-shaped body

10 - ribs

11 - ring seal

12 - cavity

13 - channel, tube

14 - pump cavity

15 - pipe

16 - working environment

17 - tank

- удлиненный участок вала

- elongated shaft

S is the resulting force.

The vertical pump for pumping the working medium contains a base plate 1, on which the shaft 2 of the pump is fixed. A shaft 4 with impeller wheels 5 mounted on the shaft is mounted inside the shaft line of the bearings 3. The wheels can be in the form of a screw 5 and subsequent centrifugal wheels (the latter are not shown). The impellers are placed in the pump casing 6 connected to the supply casing 7 in the form of a flange with a funnel.

так, что на нем закреплен диск 8, расположенный ниже уровня корпуса подвода 7. Диск 8 охватывается чашеобразным корпусом 9, который с помощью ребер 10 жестко закреплен на корпусе подвода 7.Shaft 4 extended by

so that a disk 8 is mounted on it, located below the level of the supply body 7. The disk 8 is covered by a bowl-shaped body 9, which is using ribs 10 is rigidly mounted on the supply body 7.

Between the disk 8 and the cup-shaped body 9, a radial gap seal 11 is formed in the form of an annular gap.

The cavity 12 between the disk and the bowl-shaped body 9 is connected via a tube 13 (or several tubes) to the high-pressure cavity of the pump 14. Through the pipe 15, the pumped medium 16 enters the consumer.

The base plate 1 is placed on the neck (not shown) of the reservoir 17, filled with a working medium: liquefied gas, oil, oil products in a mixture with water and small solid particles.

When the pump is operating, an electric motor (not shown) located above the base plate rotates a shaft with a paddle wheel or several paddle wheels (if the pump is centrifugal), in which the screw 5, for example, is the first stage, and one or more mounted on the shaft behind it centrifugal wheels (not shown).

The working medium 16, flowing around the ribs 10 enters the inlet casing 7 and then into the pump casing 6 and the cavity 14, from where it passes through the pipe 15 to the consumer and through the channel 13 in the form of a tube into the bowl-shaped casing 9 and acts on the disk 8, creates a force acting up - that is, perceives the weight of the shaft 4, the wheels 5 (or several wheels), as well as the hydraulic forces acting on the wheels fixed on the shaft 4. By calculation, the magnitude of the required force S is determined in such a way as to partially or completely relieve the bearing 3 from the downward forces acting on it. The simplest ring seal 11 is made in the form of an annular radial gap - it allows leakage from the cavity 12 under the disk (connecting this cavity with the cavity of the tank), thus returning the working medium to the supply housing.

Installing a balancing disk below the level of the inlet casing in a vertical pump allows the simplest solution to the problem of balancing axial forces acting downward for the following reasons:

1) the disk is located outside the pump housing and the shaft line and the diameter of the disk is not limited by anything - this will not lead to an increase in the dimensions of the shaft line or the pump body itself

2) the leakage through the gap seal enters the tank, the supply housing, where the pump is located - which does not require the use of special seals

3) the location of the device for unloading the pump bearings outside the pump makes it easier to upgrade existing pumps without significantly complicating their design.

All these are the advantages of the proposed utility model.

Claims (2)

1 A vertical vane pump for pumping a working medium from a reservoir, comprising a base plate with a shaft conduit mounted on it, inside of which a shaft with a vane wheel is mounted on bearings, a pump casing and a supply casing, characterized in that the pump shaft is elongated so that the pump shaft is lower than a drive is mounted on the drive casing, a cup-shaped casing enclosing the disk with the formation of an annular seal is rigidly fixed below the level of the drive on the supply casing; th high pressure pump housing. 2 A vertical vane pump for pumping a working medium from a reservoir according to claim 1, characterized in that the annular seal between the disk and the cup-shaped housing is made in the form of a radial slotted gap connecting the cavity between the cup-shaped housing and the disk with the supply housing.

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