Friction heater

FIELD: low-power engineering, applicable as a component of windmills for production of heated water in houses not provided with centralized hot water supply.

SUBSTANCE: the friction heater has a tank with heated liquid, fixed and rotary disks coupled to the drive shaft for joint axial motion, and a propeller with the working force in the direction of the disks are installed in the tank. The novelty in the offered heater is the installation of additional fixed and rotary disks, the propeller is fastened on the drive shaft, and each of the rotary disks is installed between two fixed disks, and a float located above the propeller for rotation relative to the drive shaft and for axial motion on the latter.

EFFECT: enhanced efficiency of heater operation at the same rotary speed of the drive shaft.

1 dwg

 

The invention relates to low energy and can be used in wind turbines for receiving heated water in houses and cottages, with no centralized hot water supply.

Known friction heater, comprising a tank with heated water, in which there is fixed coaxially and connected with the rotation drive of the rotary discs front and side surfaces, and a rotary disk provided with propeller blades mounted on its side surface with a bias towards fixed disk in the direction of rotation [see U.S. patent No. 3385287, NCI 126-247, 1969].

Also known friction heater containing all of the signs above similar, with the rotary disc is installed with the possibility of axial movement and contact of its end surface with the end surface of the fixed disk [see USSR author's certificate No. 1627790, CL F 24 J 3/00, 1989].

The specified technical solution closest to the proposed essentially the common features and the achieved result and is taken as a prototype.

To the disadvantage of the prototype (and similar) should be attributed to its low efficiency in the work, as estimated calculations for heat generation and heat transfer in a known heater show that when the disk diameter of 0.5 m, and acceptable is the sizes of wind turbines to obtain the nominal torque forces on the drive shaft of warm water (30-35° With), you can get 10-12 hours.

The technical result of the invention is to improve the efficiency of the heater is in operation with simple design for manufacture in small workshops.

The technical result is achieved by the fact that the friction heater, comprising a tank with the heated fluid in which there is fixed coaxially and connected to the drive shaft of the rotary drive and propeller with a work force in the direction of the disk, according to the invention, equipped with an additional stationary and rotatable discs, each of the rotary disks mounted between two fixed disks, and float above the propeller screw for rotation relative to the drive shaft and the axial interaction with the latter.

In addition, the distance between two adjacent fixed disks greater than the thickness of the rotary disk, and between the side walls and the bottom of the tank and the stack of disks is formed a gap for flow of heated liquid.

In addition, the rotary disk is spring-loaded to each other.

The drawing shows a longitudinal section of a friction heater in the off position of the rotary disk.

Friction heater includes a water-filled tank 1 is installed vertically to the driving shaft 2 in the radial bearings 3. Posted in the cavity is aka racks 4 rigidly fixed fixed disks 5, and on the lower end of the shaft mounted rotary disk 6, and the upper rotary disk mounted on the shaft firmly, and the lower rotary discs mounted on the core area of the shaft can move along the vertical axis. The distance between two adjacent fixed disks greater than the thickness of the rotary disk, which provides flushing the heated water to all drives and improves the removal of heat generated from the friction discs. With the same purpose between the side walls of the tank and its bottom and the stack of disks is formed a gap for flow of water.

To ensure simultaneous contact between the stationary and rotary discs springs installed 7.

On the upper end of the fixed shaft drive of a heater in the form of a rotary propeller 8, containing Mahi 9, through which the axes 10 is installed, the blades 11 and there are 12 stops for the blades. For switching the wind turbine can be installed clutch 13.

In the cavity of the tank on the axial bearing 14 has a float 15, the buoyancy force is equal to or exceeds the weight of the rotating parts and components of the heater. Below the float on the shaft 2 is rigidly fixed to the screw 16, the operating force which is directed toward the stack of disks.

The tank is provided with a socket 17 for the Gulf of cold water and a fitting 18 for discharge of the heated water. In the rotary disks are the Windows of the 19, forming a Central channel for flow of water.

Works proposed friction heater as follows.

Into the tank 1 through the fitting 17 pour cold water up to the level, until the buoyancy force of the float will not be equal to or greater than the weight of the rotating parts and components of the heater. To establish this level can be used water tube or float level indicator (not shown).

In this position, as shown in the drawing, all rotating components and parts of the heater are suspended from the float, i.e. in the floating position, the contact between the stationary and rotary discs is broken. Naturally, in this position, a small gust of wind to run in the work of the propeller 16 from rotating propeller 8.

When the rotation of the screw 16 on the shaft 2, an axial force which presses the upper rotary disk fixed to the upper disk, and through the springs 7 - underlying rotatable disks to the underlying stationary disks. On the disc surface, a force of friction which heats the disks, which, in turn, heat up drenched in a tank of water or other liquid to be heated.

When significant wind speed, and hence the significant value of revolutions of the propeller pressing force of the rotary drive to still reached the em maximum what causes braking of the rotary disk and stopping of the propeller. Pressing force drives between them decreases and the buoyancy force of the float lifts the rotary disks from stationary. The resistance to rotation of the propeller is reduced to zero, the propeller is again gaining momentum and presses the rotary disks to still.

Hot water is poured through the nozzle 18.

When there is no need for heated water in order to avoid wear of the parts and components of the heater, it is disconnected from the propeller through a clutch 13.

When hurricane wind speed off the blades 11 of the wind turbine by turning the lugs 12. In this case, all the blades 11 are arranged in a plane parallel to the wind direction, and wind load from the propeller is removed.

The proposed type of wind turbine in comparison with other designs have a slightly lower efficiency of the use of wind energy, however, its simplicity and the possibility to increase power by increasing the area of the blades allow us to recommend it as a drive proposed friction heater.

1. Friction heater, comprising a tank with the heated fluid in which there is fixed coaxially and connected to the drive shaft with the possibility of joint axial movement of the rotary drive and propeller work with the violence in the direction of the disk, characterized in that the heater is equipped with an additional stationary and rotary discs, with the propeller mounted on the drive shaft, and each of the rotary disks mounted between two fixed disks, and float above the propeller screw for rotation relative to the drive shaft and the axial interaction with the latter.

2. The heater under item 1, characterized in that the distance between two adjacent fixed disks greater than the thickness of the rotary disk, and between the side walls and the bottom of the tank and the stack of disks is formed a gap for flow of heated liquid.

3. The heater under item 1, characterized in that the rotary disk is spring-loaded with each other on the drive shaft.



 

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