RU2357160C1 - Rotary-cavitation type heat generator - Google Patents

Abstract

FIELD: heating systems.

SUBSTANCE: invention is intended for heat and hot water supply to industrial and domestic objects, and for heating process liquids. Rotary-cavitation heat generator consists of a housing with inlet and outlet for heated liquid, and has cylindrical cavity wherein there arranged are two coaxial rings one of which is fixed rigidly relative to housing, and the other one is installed with the possibility of rotating on drive shaft that is coaxial to rings equipped with radial holes. Inner ring is solid-metal and has the possibility of rotating about heat generator housing, and is equipped with an impeller located on end surface of the ring opposite to heat generator inlet; outer ring is made in the form of a sleeve rigidly installed in the housing on mounting surfaces with variable clearance of 1 mm near end surfaces of housing up to 5 mm in the centre relative to inner surface of housing; heat generator inlet is located coaxially to drive shaft, and outlet - along the centre of housing in the area of maximum clearance between housing and sleeve.

EFFECT: reducing energy consumption, simplifying the design, and improving life-time of the device.

3 cl, 2 dwg

Description

The invention relates to heat engineering, and in particular to devices containing rotating elements for heating fluids, and can be used for heat and hot water supply of industrial and domestic facilities, heating process liquids.

Known cavitation-rotary heat generator (F24J 3/00, No. 2258875, publ. 08/20/05), adopted as a prototype. The cavitation-rotary heat generator consists of a housing with an inlet and an outlet for a heated fluid having a cylindrical cavity, and two coaxial rings placed in it, one of which is fixed motionless relative to the housing, and the other is rotated from a drive shaft coaxial with the rings. The rings are provided with radial holes located in a plane perpendicular to the axis of rotation. The outer coaxial ring is rotatable, and the inner one is stationary relative to the housing.

The disadvantage of the prototype is the lack of heat output, low ability to pump the heated fluid in the absence of external pressure, design complexity, low corrosion resistance.

The proposed invention solves the problem of reducing energy consumption during heating, simplifying the design and increasing the durability of the device.

The technical result obtained by carrying out the invention is to increase the efficiency of the device, reduce costs in its manufacture and to increase the corrosion and cavitation resistance of the main components of the device.

The specified technical result is achieved by the fact that in the proposed heat generator of rotary-cavitation type, consisting of a housing with an inlet and outlet for a heated fluid having a cylindrical cavity in which two coaxial rings are placed, one of which is fixed motionless relative to the housing, and the other is installed with the possibility of rotation on the drive shaft, coaxial with the rings provided with radial holes, new is that the inner ring is made of all-metal and can rotate about relative to the body of the heat generator and is equipped with an impeller placed on the end side of the ring opposite to the inlet of the heat generator, the outer ring is made in the form of a sleeve fixed in the case, the sleeve is installed in the case on landing surfaces with a variable gap from 1 mm closer to the end surfaces of the case to 5 mm in the center relative to the inner surface of the housing, the input of the heat generator is placed coaxially with the drive shaft, and the output is centered on the housing in the place of the largest clearance between the housing and the sleeve, radial tverstiya in the sleeve and the inner rotating disc made conical with increasing diameter of the cone towards the outlet of the heat generator. all elements of the heat generator in contact with the heated fluid are made of stainless steels.

The execution of the inner ring is all-metal with an impeller placed on the front side of the ring opposite to the input of the heat generator with the possibility of rotation relative to the housing due to the following factors:

- the need to obtain due to the operation of the impeller a full flow of heated fluid moving from inlet to outlet, i.e. giving the heat generator a pump function, which allows it to function without an additional inlet pump;

- the need to separate the integral flow of the heated fluid in the radial holes of the inner rotating ring and the formation of multiple flows flowing through the holes at high speed due to the action of centrifugal forces and moving in the direction of similar holes in the fixed ring (sleeve);

- the placement of the impeller opposite the input of the heat generator allows free access to the fluid entering the heat generator;

- all-metal design allows to simplify the design of the inner rotating ring, to facilitate its balancing, to increase the service life by eliminating the need to assemble several parts, the absence of fasteners that are intensively subjected to corrosion wear, coking with salt deposits, which affects the efficiency of the heat generator and complicates the implementation of preventive measures in operation process.

The execution of the outer ring in the form of a sleeve fixedly mounted on the seating surfaces in the housing with a variable gap from 1 mm closer to the end surfaces of the housing to 5 mm in the center relative to the housing, allows to solve the following problems:

- to promote the flow of heated fluid coming from the radial holes of the inner rotating ring due to the action of centrifugal forces and pressure created by the impeller through the radial holes in the sleeve and to brake them on the inner surface of the housing with the effective release of thermal energy;

- to obtain in the zones of the radial holes of the liner and the internal rotating ring constantly formed cavitation cavities, leading to additional heating of the liquid;

- to obtain due to the gap thus made, a stable flow of heated fluid moving after braking on the inner surface of the housing to the outlet of the heat generator.

The location of the heat generator inlet is coaxial with the drive shaft, and the output is in the center of the housing in the place of the largest gap between the housing and the sleeve due to the following factors:

- the supply of the heated fluid to the area of the drive shaft allows the process of its entry into the heat generator most efficiently, because this zone has a reduced pressure created by the action of centrifugal forces, which allows you to fully load the impeller of the inner rotating ring and maintain the mass of liquid pumped through the heat generator at a stable high level;

- the removal of the heated working fluid is carried out from the zone of high pressure, i.e. with the greatest efficiency;

- the direction of action of the centrifugal forces does not impede, but contributes to the advancement of the fluid to the working bodies of the heat generator and its output.

The implementation of the radial holes in the sleeve and the inner rotating disk conical with an increase in the diameter of the cone towards the outlet of the heat generator allows the holes to operate in multiple diffusers that convert the kinetic energy of the flow of the heated fluid into pressure energy, which allows you to maintain high pressure at the outlet of the heat generator and lowered to the entrance.

All elements of the heat generator in contact with the heated fluid are made of corrosion-resistant (stainless) steels, which allows to increase the service life of the components and the entire heat generator as a whole. When using the above materials, as shown by the operating experience of plants of this type, special chemical preparation of the heated fluid is not required, since salt deposits are absent and heat production does not decrease over time.

Technical solutions with features distinguishing the claimed solution from the prototype are not known and do not follow explicitly from the prior art. This suggests that the claimed solution is new and has an inventive step.

The invention is illustrated by drawings, where figure 1 shows a General diagram of a heat generator rotary-cavitation type; figure 2 - embodiment of the conical radial holes on the sleeve and the inner rotating ring.

The rotary-cavitation type heat generator consists of a support unit 1, rigidly attached to the housing 2 with a cover 3. Bearings 4 are placed in the support assembly 1, in which the drive shaft 5 and the seal 6 are installed. Inside the housing 2 on the mounting surfaces 7 there is a sleeve 8, between the outer surface of which and the machined surface of the housing forms a gap 9 that is variable along the length of the housing. The largest gap is located in the center of the housing 2. The drive shaft 5 is connected at one end to a drive (not shown) and at the other end inside of the sleeve 2 with a cover 3 and a sleeve 8 rotatably mounted an inner ring 10 having an end recess of cylindrical shape, where an impeller 11 is placed, made integral with the inner ring 10. On the end surface of the ring 10 closer to the drive shaft 5 there are through holes 12 for to ensure the passage of the heated fluid into the gap between the wall of the support node 1 and the ring 10. The inner ring 10 and the sleeve 8 have rows of through holes 13 located strictly opposite each other. The input of the heat generator 14 is located coaxially with the drive shaft on the cover 3, and the output 15 is in the center of the housing 2. The holes 13 on the sleeve 8 and the inner ring 10 are made conical.

The heat generator rotary-cavitation type operates as follows. After filling through the inlet 14 with the fluid-heated inner cavity of the heat generator, a drive (not shown) is turned on, which drives the drive shaft 5 with the inner ring 10 mounted in the bearings 4 and sealed with a seal 6. The heated fluid is picked up by the impeller 11, as well as under the action of centrifugal forces rushes to the radial holes 13, when they overlap, it falls into the gap 9, heating due to friction, braking on the inner surface of the housing 2 and cavitation that occurs in the area of the holes 13. Frequent the heated liquid is moved through the through holes 12 and moves between the end face of the inner ring 10 and the wall of the supporting unit 1. Retraction heated fluid through outlet 15. The centrifugal forces acting on the liquid to be heated, contribute to its effective passage and heating through the interior of the heat generator.

Claims (3)

1. A heat generator of rotor-cavitation type, consisting of a housing with an inlet and outlet for a heated fluid, having a cylindrical cavity in which two coaxial rings are placed, one of which is fixed motionless relative to the housing, and the other is mounted for rotation on a drive shaft coaxial with rings provided with radial holes, characterized in that the inner ring is made of metal with the possibility of rotation relative to the body of the heat generator and is equipped with an impeller, placed on the front side of the ring opposite to the heat source entrance, the outer ring is made in the form of a sleeve fixed in the body, the sleeve is installed in the body on the seating surfaces with a variable gap from 1 mm closer to the body end surfaces up to 5 mm in the center relative to the internal surface of the body, the heat source input placed coaxially with the drive shaft, and the output is in the center of the housing in the place of the largest clearance between the housing and the sleeve. 2. The rotary-cavitation type heat generator according to claim 1, characterized in that the radial holes in the sleeve and the internal rotating disk are conical with an increase in the diameter of the cone towards the outlet of the heat generator. 3. The rotary-cavitation type heat generator according to claim 1, characterized in that all the elements of the heat generator in contact with the heated fluid are made of stainless steels.

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