The impeller propeller turbines

 

(57) Abstract:

The invention relates to the field of hydrocarbonate. In the impeller, comprising a housing with a cone and blades with mounting flanges, enshrined in the second slots of the housing, the flange of each blade is made in the shape of a rectangle, and the nest at the end of the housing from the side of the body is open, allowing you to push the blades through these open sides in the axial direction and thereby remove them from the working chamber without removing the impeller. The use of the invention allows to reduce the complexity of maintenance of the impeller of the turbine. 1 C.p. f-crystals, 2 Il.

The invention relates to the field of hydrocarbonate and can be used in the manufacture of impellers propeller turbines,

In the propeller turbines, the blades of the impeller permanently fixed with optimal installation angle. Each blade is equipped with a mounting flange that is installed in the corresponding slot of the housing and fixed therein, in particular bolts (1). This traditional impeller is the closest analog of the present invention.

In the impeller propeller hydro is bhodemon to carry out the dismantling of the blades. However, in the known propeller-turbines flange blades traditionally perform all by placing it in a deep round socket housing, and therefore the blades cannot be removed through the chamber of the impeller, which does not allow you to push the blade with flange from the cylindrical sockets of the buildings in the radial direction. Therefore it is necessary to dismantle the entire impeller, which increases the complexity of maintenance,

The main task of the present invention was the creation of such impeller propeller turbine in which the blades were connected to the housing so that each blade can be removed separately with the output from the camera impeller.

This problem is solved in the impeller propeller turbine, which includes a housing with a cone and blades with mounting flanges, enshrined in the second slots of the housing, and in which, in accordance with the essence of the present invention, the flange of each blade is made in the shape of a rectangle, and a slot in the housing from the side of the cone is made open.

This solution allows after disassembly of flanged joints to move each blade in the axial voltage is t maintainability of the impeller. Besides the rectangular shape of the flange of the blade eliminates the possibility of its reversal, eliminating the action of the corresponding moment of the forces on the bolts and thereby eliminating the need to install special keys, perceiving efforts slice from the moment that exist in the working wheels of conventional designs. Rectangular flange according to the invention, in addition to the above advantages, having a larger area than traditionally performed round flanges, allows to increase the area of sealing the root section of the blade and thereby increase its strength and rigidity.

The flange of the blade can be fixed to the chassis using commonly used bolt connection, but can be used and another famous flange connection with the case, in particular, in the form of a dovetail, capable of resisting the action of centrifugal force. The axial force acting on the blade, a relatively small and in many cases the efforts of the tightening bolt connection may be sufficient for the perception of this effort. However, if you need a significant increase in the margin of safety can be applied to any known special tool for axial forces. ODN blades.

The essence of the present invention is illustrated in the following further detailed description of one example implementation, depicted in the attached drawings, in which:

Fig. 1 shows the impeller propeller turbines at the sight of him in the radial direction;

Fig. 2 - impeller of Fig. 1 in the meridional section along a-a in Fig. 1.

The impeller propeller turbine, as shown in the drawings, includes a housing 1 is fixed at its end of the cone 2 and the blades 3. Each blade 5 is made with a mounting flange 4 to which the root section made a smooth transition. The flange 4 has a rectangular shape and set to meet him on the size and shape of the slot 5 in the casing 1 impeller. The slot 5 is made from cone 2 open. The flange 4 is fixed to the housing 1 by means of bolts 6. On the inner side of the housing 1 through the opening it has the finger 7, part of his end in the recess of the flange 4 and thereby locking the blade 3 from moving in the axial direction.

If necessary, removal of the blades 3 are first removed the cone 2. Then remove the blade extends from the undercut in the flange 4 of the blade finger 7, vivenciada mounting boltpistol is carried out in reverse order.

The source of information

1. Reference turbines. L., 1984, S. 155, Fig. U. 18.

1. The impeller propeller turbine, comprising a housing with a cone and blades with mounting flanges, enshrined in the second slots of the housing, wherein the flange of each blade is made in the shape of a rectangle, and the nest at the end of the body of the cone is made open.

2. The impeller under item 1, characterized in that on the inner side of the body has fingers that are included with their ends in the undercut flanges of the blades.

 

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