RU77917U1 - CENTRIFUGAL TURBO MACHINE FOR TRANSPORTATION OF CURRENT - Google Patents

Abstract

The utility model relates to vane turbomachines, in particular to pumps, compressors, fans, and can be used to transport any fluid. The technical task is to simplify the regulation of the operating parameters of the turbomachine during operation while expanding the range of their regulation. For this, a centrifugal turbomachine containing a cylindrical housing 1 with a supply 2 and a discharge 3 nozzles, an impeller 5 with blades 6 mounted on a drive shaft 4 inside the housing 1 is provided with a cylindrical shell 7 with blades 8 that are radially arranged with a uniform pitch on its inner surface. While the cylindrical shell 7 is installed inside the cylindrical body 1 coaxially with the impeller 5 with the possibility of adjustable axial rotation. 2 ill.

Description

The utility model relates to vane turbomachines, in particular to fans, pumps, compressors, and can be used to transport any fluid, for example, water, air, oil, etc.

Known centrifugal machine containing a spiral casing with inlet and outlet pipes and mounted inside the casing with the possibility of rotation of the impeller with blades (see Kartavy N.G. Stationary machines: Textbook for universities.- M .: Nedra, 1981. P. 14, fig. 2.1).

The disadvantage of this device is the difficulty of regulating its main parameters, namely, flow rate and pressure of the fluid, in the process, as this is provided by throttling the flow at the inlet or outlet, which is ineffective.

The closest analogue to the claimed object is a centrifugal turbomachine containing a housing with inlet and outlet pipes, inside of which an impeller with blades is installed on the drive shaft (see Smorodin S.S., Verstakov G.V. Mine stationary machines and installations: Training manual .- M .: Nedra, 1975.P.19, Fig. 10).

A disadvantage of the known turbomachine is that the regulation of its main operating parameters during operation occurs due to the rotation of the blades or their individual parts, or due to a change in the direction of flow before entering the impeller, which greatly complicates the design and does not provide a wide range of parameter settings.

The technical problem solved by the utility model is to simplify the regulation of the operating parameters of the turbomachine directly

during operation while expanding the range of their regulation.

The problem is solved in that the known centrifugal turbomachine for transporting fluid, containing a housing with inlet and outlet pipes, inside of which an impeller with blades is mounted on the drive shaft, according to the change, is equipped with a cylindrical shell with blades radially spaced with a uniform pitch on its inner surface , the casing of the turbomachine is cylindrical and, inside it, coaxially with the impeller, is mounted with the possibility of adjustable axial rotation shell.

The essence of the utility model is illustrated by drawings, where:

- figure 1 schematically shows a centrifugal turbomachine for transporting fluid in the context;

- figure 2 is a section aa in figure 1.

A centrifugal turbomachine for transporting fluid contains a cylindrical body 1 (Fig. 1, 2) with a supply 2 (Fig. 1) and 3 outlet pipes that are located at its ends. Inside the cylindrical body 1, an impeller 5 (Figs. 1, 2) with blades 6 is installed on the drive shaft 4. The turbomachine is equipped with a cylindrical shell 7 with blades 8. 1 coaxially to the impeller 5 with the possibility of adjustable axial rotation and its radial blades 8 are directed towards the blades 6 of the impeller 5. This constructive design of the shell 7 allows for its rotation with a different frequency and direction of rotation relative to the impeller 5. To ensure the specified axial rotation of the shell 7, any known drive can be used, for example, electric, mechanical, pneumatic, etc.

The inventive centrifugal turbomachine operates as follows.

The fluid (air, water, etc.) is supplied to the housing 1 (Fig. 1) through the inlet pipe 2 and immediately enters the blades 6 of the rotating impeller 5. Under the action of centrifugal force, when the fluid flows through the impeller 5, the static pressure and kinetic energy of the relative motion of the fluid, which is greater, the higher the speed of the relative motion of the shell 7 and the impeller 5. The fluid at the outlet of the impeller 5 loses part of its energy due to mixing with the fluid located in the housing 1, due to silt friction and other factors. This leads to the creation of the corresponding resulting pressure in the outlet pipe 3.

If the casing 7 rotates in the opposite direction relative to the impeller 5, the relative speed and, accordingly, the increment of the static pressure and kinetic energy of the fluid increase, and the resulting pressure of the moving fluid in the outlet pipe takes its maximum value.

If the direction of rotation of the shell 7 and the impeller 5 coincide, the relative speed decreases and, accordingly, the increment of static pressure and kinetic energy of the fluid also decreases, and when the speed of the shell 7 becomes equal to the frequency of rotation of the impeller 5, the resulting pressure in the outlet pipe 3 vanishes and fluid motion stops.

In the event that the rotational speed of the shell 7 exceeds the rotational speed of the impeller 5, the relative speed and, correspondingly, the increment of static pressure and kinetic energy of the fluid motion take a negative value and the fluid motion changes its direction in the housing 1 of the turbomachine.

Thus, the inventive centrifugal turbomachine provides ease of regulation of the fluid pressure at the outlet of the housing at a constant

the frequency of rotation of the impeller in a wide range, which allows you to accelerate, slow down or stop the movement of the flow of fluid, as well as change its direction directly during transportation. In addition, the claimed design of the turbomachine helps to reduce energy consumption for its operation by 15-20% by eliminating the loss of throttling fluid.

Claims (1)

A centrifugal turbomachine for transporting fluid, comprising a housing with inlet and outlet nozzles, inside which an impeller with blades is mounted on the drive shaft, characterized in that it is provided with a cylindrical shell with blades radially spaced with a uniform pitch on its inner surface, the turbomachine housing is made of a cylindrical and inside it, a cylindrical shell is mounted coaxially with the impeller with the possibility of adjustable axial rotation.