Turbine with shutter

 

(57) Abstract:

The turbine is designed for the energy of the flow stream. The turbine includes a shaft, axial impeller, stator, providing promotionsthe her flowing part and the shutter made with surfaces that ensure its adherence to the surfaces of the stator, and having the ability to move along the axis of the turbine for closing or opening the flow part through a system of levers and drive. The shaft has a housing with supports and guides for the gate. On the shutter housing mounted levers interacting with supports and guides on the casing of the shaft, and adjustable stops for the levers. The shutter in the maximum raised position pressed by the actuator to the lugs on the casing of the shaft. The design of the device enables the creation of vertical turbines shutter as a single, permanently-built unit in HPP. 2 Il.

The invention relates to power engineering and can be used in the turbines.

Known turbine flow path, close to the uniflow located horizontally (see N. N. Kovalev. The turbines. HP: motor cycle", 1971, page 84). Due to priblijennosti turbine and its speed.

Straightened flow path characterized by a more uniform compared with the radial inlet velocity distribution in the flow part and, in particular, in the area between the stator and impeller. This reduces the level of energy losses and increases hydraulic efficiency.

These advantages turbines with direct-flow system can be expressed in the increase of power compared to the turbine with a radial inlet with the same diameter of the impeller and the pressure.

But despite all these advantages flow path, the horizontal position of the considered turbine complicates the design of the entire unit, most of the nodes which are placed in a special capsule below the level of the upstream, which implies that the specificity of such nodes and creates certain difficulties. In addition, the horizontal layout of the unit allows the use of only performed separately shutter, which increases the length of the inlet conduit.

Closest to the claimed technical solution is the solution claimed in the U.S. patent 1682966, priority from 14.07.1924 "Water Wheel". The design of the slide, as claimed in this patent,he levers connected with the hydraulic actuator, with the help of which it can move along the axis of the hydraulic unit for controlling the flow of water through the turbine, i.e., to regulate its power. The disadvantage of this design is its system of levers, which although reduces the necessary force to move the bolt, but it is created through the creation of a significant size of these levers, as they are attached to the wall of the flow part of the building of a hydroelectric power station.

This leverage when lifting the shutter moves it relative to the axis of the hydraulic unit, thereby disrupting osesimmetrichnoi flow, which reduces the efficiency of the turbine. The operation for mounting the hinge levers on the walls of the building of a hydroelectric power station increases the time of installation of the equipment.

The technical result of the claimed invention is to provide a vertical turbines shutter as a single, completely manufactured for installation on HPP building block.

The technical result is achieved by the fact that the turbine comprising a shaft, axial impeller, stator, providing promotionsthe her flowing part, the shutter is made with surfaces that ensure its adherence to the surfaces of the stator,redstem system of levers and drive, the shaft has a housing with supports and guides the shutter, the shutter housing are levers interacting with supports and guides on the casing of the shaft in order to reduce the load on the drive speed and decrease the speed of the shutter in the area of small discoveries, as well as to ensure straightness move the bolt along the axis of the turbine, also on the shutter housing are adjustable stops to ensure the simultaneity touch levers shutter stops on the casing of the shaft, the valve is in the maximum raised position pressed by the actuator to the lugs on the casing of the shaft.

In Fig. 1 shows a turbine with the shutter where the shutter is shown in two positions - open flow area (upper position) and closed flow area (lower position). In Fig.2 shows the shutter is pressed against the upper adjustable stop. In Fig.1 and 2 indicated:

1 - impeller

2 - stator turbine

3 - shutter

4 - stop on the top

5 - cover the shaft

6 - guides

7 - drive shutter

8 - arm

9 - stop on the bottom

10 - the adjustable

11 - zone stator outer

12 - zone stator internal

In the proposed design of the turbine regulirovaniya 3, having the ability to move along the axis of the block, only opens or closes a flow path. Promotionsthe flow to the turbine is provided by the shape of the stator 2, the profiled pillars which are the stationary vanes of the guide vane.

Lowering the shutter 3 when the overlapping of the duct at the expense of the weight of the shutter hydraulic or electric actuator 7 is connected with the shutter steel slings. During operation of the turbine gate is raised by a certain amount to eliminate its impact on the watercourse and pressed against the upper lugs 4 on the casing of the shaft 5. The straightness of the movement of the shutter, which is exposed to flow, provide levers 8 and the guides 6 on the casing of the shaft 5. Before completing overlap duct pressure on the shutter 3 rises due to the occurrence of differential water pressure. To avoid overloading of the actuator 7, the casing of the shaft 5 is provided lower stop 9, upon which the levers 8, resulting in a redistribution of the load actuator 7 to the stop 9. Using the same levers 8 is slow lowering of the shutter 3, which reduces the effect of the reaction water flow part of the turbine at the moment is full of the outer 11 and 12 internal zones of the stator 2. When lifting the valve for opening the flow path of the turbine are the same as the results of the interaction of the levers 8 and lock 9, i.e., reduces the load on the drive of the shutter 7 and slows the movement speed of the shutter 3. To avoid bias in the position of the shutter 3 as it descends provides simultaneous touch all the levers 8 gate 3 stops 9 on the casing of the shaft 5. To this end, the shutter has adjustable stops 10, through which is regulated by the angular position of each lever 8. When lifting of the shutter 3, the rotation of the levers 8 after termination of their interaction with the stop 9 is limited to the same lugs 10.

Due to the claimed solution is achieved by the following technical and economic effect. Obtained the ability to manufacture turbines with a shutter in the form of a completely manufactured at the factory block. The design of the turbine reduces the amount of installation work when you install it on HPP and reduce the intensity of the product, which reduces its cost.

Turbine comprising a shaft, axial impeller, stator, providing promotionsthe her flowing part and the shutter made with surfaces that ensure its adherence to the surfaces of the stator, and Imom system of levers and drive, wherein the shaft has a housing with supports and guides the shutter, the shutter housing mounted levers interacting with supports and guides on the casing of the shaft, and adjustable stops for the levers, the valve is in the maximum raised position pressed by the actuator to the lugs on the casing of the shaft.

 

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