UA7605U - Torque flow pump - Google Patents

Abstract

A torque flow pump has a housing, a suction and a pump-in branch pipes, a swirl chamber, an open working wheel with blades at the edges of which there are placed long ribs. At that, the blades are inclined at radius in direction of rotation.

Description

Description of the invention

The useful model refers to pump construction and can be used in designs of free-vortex 2 pumps for pumping liquids, including those with gas or solid inclusions.

A free-vortex pump |1) is known, which contains a housing, a vortex chamber, suction and discharge nozzles and an impeller with blades normal to the plane of the impeller disc placed in a niche of the housing.

The disadvantage of this pump is significant hydraulic losses due to vortex formation and hydraulic braking at the outlet of the pump. 70 The pump (21, taken as the closest analogue) is also known, which contains a body, a vortex chamber, suction and discharge nozzles, an impeller with blades, along the edges of which ribs are made in the plane of rotation, directed in the direction of rotation, and the vortex chamber has a width of 0.34...0.38 from the outer diameter of the impeller when the diameter of the pressure nozzle is equal to the width of the chamber.

However, with this shape of the blades and the width of the vortex chamber, free-vortex pumps have insufficient meridional swirling of the liquid flow and, as a result, insufficient pump flow and pressure.

The useful model is based on the task of improving the flow rate and pressure of the free-vortex pump by improving the prototype.

This problem is solved by the fact that the pump blades are set at an angle of 10...15 2 to the radius, and longitudinal ribs having a variable width are placed on the outer edges, which increase in the direction of the periphery 20 of the impeller, and the minimum width of the rib near the center of the impeller is 0.12-0.15, and the maximum width of the rib is 0.35-0.45 of the height of the impeller blade. The width of the vortex chamber is set equal to 1.0-1.8 from the height of the blades of the impeller.

An additional increase in flow rate and pressure is achieved due to the fact that the transfer of energy from the blades to the liquid increases with reduced turbulent losses in the flow, and the set width of the vortex chamber ensures 29 uniform energy transfer of the blades of the impeller across the entire width of the flow in the vortex chamber and thus (Ш - uniform distribution of speeds throughout the flow.

The essence of the useful model is explained by the drawings, where Fig. 1 shows a general view of the free-vortex pump with a cut-out, Fig. 2 shows a longitudinal section, Fig. 3 shows a drawing of the impeller, Fig. 4 shows an axonometric view of the impeller. The pump includes a body 71, a vortex chamber 2, a suction 30 and a discharge 4 nozzles, an impeller 5 as part of a disk 6, blades 7, on the edges of which longitudinal av! ribs 8. The width of the vortex chamber is 1.0-1.8 from the height of the blades of the impeller.

During the operation of the pump, the liquid through the suction pipe C enters the vortex chamber 2, where it receives energy from the impeller 5 due to meridional circulation. The current flows into the discharge nozzle 4. -

The appropriate width of the vortex chamber, inclined blades and longitudinal ribs create a uniform and strong

From swirling the current without excessive turbulence of the flow involved in the meridional circulation, it increases the energy transferred to the current. Accordingly, the pressure and flow rate of the liquid created by the pump increases. "

The application of the technical solution of the declared utility model allows to increase the efficiency of the free-vortex pump by 2.5-3,595 and is suitable for use in any types of free-vortex pumps. -

Sources of information 1. Catalog of OJSC Sumy Plant "Nasosenergomash". Pumps of the SVN brand. p 2. Patent of Ukraine Mo 25569 A "Free-vortex pump" Cl. P0405/00. ;» Z t 4 1 Za - g « Her - M Where (22) I 7

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Claims (3)

;" Formula of the invention 45 1. A free-vortex pump, which contains a body, suction and discharge nozzles, a vortex chamber, and an open impeller with blades, on the edges of which there are longitudinal ribs, which is distinguished by the fact that the FO blades have an inclination to a radius in the direction of rotation of 100- 159, 2. The pump according to claim 1, which differs in that the longitudinal ribs have a variable width that increases in the direction of the periphery of the impeller, and the minimum width of the rib near the center of the impeller is c 20 0.12-0.15, and the maximum width of the rib is 0.35-0.45 of the height of the impeller blade. 3. The pump according to claim 1, which is characterized by the fact that the vortex chamber has a width in the range of 1-1.8 times the height of the impeller blades. Official bulletin "Industrial Property". Book 1 "Inventions, useful models, topographies of integrated So microcircuits", 2005, M 6, 15.06.2005. State Department of Intellectual Property of the Ministry of Education and Science of Ukraine. 60 b5