JPH051658A - Water turbine - Google Patents

Abstract

PURPOSE:To enhance operating efficiency for connection/disconnection by connecting/disconnecting rotating sections in a simple manner when the maintenance and inspection for the rotating sections such as the impeller shaft of a water turbine, the impeller and the like are performed even if they are installed at a remote country where an automatic winding machine for the water turbine such as a hoist, a crane and the like are not available. CONSTITUTION:Projected section 1A and 1B projected to both the outer sides of a casing 3 are formed onto an impeller shaft 1 fixed onto the impeller 2 of a water turbine in advance. The projected sections 1A and 1B are rotatably supported by support members 10 by pushing up the support members 10 corresponding to the lower sides of the projected sections 1A and 1B with a lifting device 12 such as a screw jack and the like manually operated, so that the rotating sections such as the impeller shaft, the impeller 2 and the like is constituted to be pulled in and out with the impeller shaft 1 rotated.

Description

Detailed Description of the Invention

[0001]

The present invention relates to the energy of water,
The present invention relates to a water turbine that effectively converts mechanical energy into work (for example, power generation).

[0002]

2. Description of the Related Art As a conventionally known turbine, there is a cross-flow turbine having an impeller in which water enters in a direction perpendicular to an axis as shown in FIG. In this type of water turbine, an impeller 2 fixed to an impeller shaft 1 is stored in a casing 3 in a liquid-tight and rotatable manner, an inlet pipe 4 is detachably attached to an inlet 3A of the casing 3, and the casing 3 Exit 3
An outlet pipe 5 is detachably attached to B, and the impeller shaft 1
Both ends of the bearing are pivotally supported by two bearings 7, 7 (however, only one bearing is shown in the drawing) mounted on the bracket 6 in the casing 3.
Therefore, the impeller 2 and the impeller shaft 1 are rotated by the water flow introduced into the casing 3 through the water conduit 15 connected to the inlet pipe 4, and are connected via the coupling 8 (not shown). Rotate a rotating shaft (for example, a rotating shaft of a generator).

By the way, in this type of turbine, maintenance and inspection of rotating parts such as the impeller shaft 1 and the impeller 2 are carried out by first removing the casing 3 and then using an automatic hoisting device such as a hoist or a crane. It is performed by lifting and removing the impeller shaft 1 and the impeller 2, and the movement to the assembly position after the completion of maintenance and inspection is also performed by using the automatic hoisting device. That is, the work of attaching and detaching the rotating parts such as the impeller shaft 1 and the impeller 2 is performed by using the automatic hoisting device. However, if the water turbine is installed in a remote area where the drive power source for the automatic hoisting device such as the hoist or crane cannot be secured, the automatic hoisting device cannot be used. Therefore, in the detaching work of the rotating parts such as the impeller shaft 1 and the impeller 2 in such a remote area, first, a framework that straddles the water turbine is constructed, and
For example, a manual hoisting device called a chain block is attached, and the manual hoisting device is manually operated by an operator. However, the detaching work performed using such a manual hoisting device involves some risk and requires a relatively long time for operations such as setup and withdrawal, so that the detachment workability is poor. It has drawbacks.

[0004]

The problem to be solved is that the detaching work of the rotating portion, which was done in a remote area where the automatic hoisting device cannot be used, is accompanied by some danger and the detaching workability is poor. It is a point.

[0005]

According to the present invention, an impeller fixed to an impeller shaft is stored in a casing in a liquid-tight and rotatably manner, and an inlet pipe is detachably attached to an inlet of the casing. A water turbine in which an outlet pipe is detachably attached to an outlet of a casing, and the impeller and the impeller shaft are rotated by a water flow introduced into the casing through a water guide pipe connected to the inlet pipe. Projecting parts projecting outward from both sides of the casing are formed on the impeller shaft, and a supporting member that supports the projecting parts so as to be rollable is disposed corresponding to the lower side of the projecting parts. An elevating device is provided for this purpose.

[0006]

According to the present invention, after removing the casing, the support member is raised to a predetermined height by operating the lifting device, so that the support member pushes up the protruding portion of the impeller shaft to roll the protruding portion. Can be movably supported. Therefore, the work of attaching and detaching the rotating portion can be performed quickly and safely by a simple operation of simply rolling the impeller shaft on the support member.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing an embodiment of the present invention in a partial cross section, and FIG. 2 is a side view of FIG. Description will be given with reference numerals. 1 and 2, the impeller shaft 1
The impeller 2 fixed to the housing is stored in the casing 3 so as to be liquid-tight and rotatable. The casing 3 is composed of an inflow side casing 3A and a discharge side casing 3B, and an inlet pipe 4 is detachably attached to the inflow side casing 3A and an outlet pipe 5 is detachably attached to the discharge side casing 3B. Both ends of the impeller shaft 1 are supported by two bearings 7, 7 (however, only one bearing is shown in the drawing) mounted on the brackets 6, 6 in the casing 3. The impeller shaft 1 is formed with protrusions 1A and 1B that protrude to the outside of both sides of the casing 3, and the portions of these protrusions 1A and 1B close to the casing 3 are axially supported by bearings 9 and 9. 9, 9 is
The brackets 6 and 6 are detachably attached to the base portion 6A. In addition, a pair of support members 10, which extend horizontally in a direction orthogonal to the impeller shaft 1, corresponding to the lower sides of the protrusions 1A and 1B,
10 is arranged, and under each of the support members 10, 10, there are arranged elevating devices 12, 12 which are supported by beam members 11 and are, for example, screw jacks. Thirteen
Is a guide vane, and 14 is a guide vane operating arm. By changing the inclination of the guide vane 13 by operating the guide vane operating arm 14, the amount of water passing through the impeller 2 is changed and the rotational output of the impeller shaft 1 is adjusted. It is supposed to do. Therefore, similarly to the conventional turbine, the impeller 2 and the impeller shaft 1 are rotated by the water flow introduced into the casing 3 through the water conduit 15 connected to the inlet pipe 4, and via the coupling 8. The rotating shaft (not shown) to be connected is rotated.

In the above structure, the maintenance and inspection of the rotating parts such as the impeller shaft 1 and the impeller 2 are carried out first by the casing 3
After removing the above, the lifting devices 12, 12 are manually operated to raise the support members 10, 10 to the height shown by the imaginary line X in FIG.
Of the impeller 2, the bearing 7,
7, the bearings 9, 9 and the brackets 6, 6 are simultaneously raised. As a result, the protrusions 1A and 1B of the impeller shaft 1 are rotatably supported on the upper surfaces of the support members 10 and 10. In this state, in an appropriate place (even bracket 6,
6) is grasped and pulled out in the direction of arrow A, the impeller shaft 1 is rolled on the support members 10, 10 and the rotating portion is taken out. Further, the movement to the assembly position after the maintenance and inspection can be performed by grasping an appropriate place and pushing it in the direction of arrow B. In other words, even if the water turbine is installed in a remote area where it is not possible to secure the drive power for the automatic hoisting device such as a hoist or crane, it is necessary to construct a conventional frame that straddles the water turbine or use a manual block such as a chain block for this frame. The troublesome setup for mounting the hoisting device is omitted, and the impeller shaft 1
Since the rotating portion can be quickly and safely attached / detached by a simple operation of simply rolling, the attaching / detaching workability is significantly improved.

In the above-mentioned embodiment, the crossflow turbine is provided with the impeller 2 in which the water entry direction is perpendicular to the impeller shaft 1. However, the present invention is not limited to the crossflow turbine, but is horizontal. It goes without saying that it is also applicable to other types of water turbines with a directional impeller shaft 1.

[0010]

As described above, according to the present invention,
After removing the casing, the supporting member is raised to a predetermined height by the operation of the elevating device, and the supporting member pushes up the protruding portion of the impeller shaft to rotatably support the protruding portion and the blade on the supporting member. Since the rotating parts such as the impeller shaft and the impeller can be installed and removed by rolling the axle, the water turbine is installed in a remote area where it is not possible to secure the drive power source for the automatic hoisting equipment such as hoists and cranes. Even if the conventional troublesome setup is omitted and the impeller shaft is simply rolled, the rotating portion can be quickly and safely attached / detached to greatly improve the attaching / detaching workability. There are advantages.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention partially in section.

FIG. 2 is a side view of FIG.

FIG. 3 is a perspective view showing a conventional example with a partial cross section.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Impeller shaft 1A Impeller shaft protrusion 1B Impeller shaft protrusion 2 Impeller 3 Casing 3A Casing inlet 3B Casing outlet 4 Inlet pipe 5 Outlet pipe 10 Supporting member 12 Lifting device 15 Water guide pipe

Claims (1)

Claim: What is claimed is: 1. An impeller fixed to an impeller shaft is liquid-tightly and rotatably stored in a casing, an inlet pipe is detachably attached to an inlet of the casing, and An outlet pipe is detachably attached to the outlet, and the impeller and the impeller shaft are rotated by a water flow introduced into the casing through a water guide pipe connected to the inlet pipe, wherein Protrusions are formed on the impeller shaft so as to protrude to the outside of both sides of the casing, and a support member is arranged corresponding to the lower side of the protrusions so as to rollably support the protrusions. A water turbine equipped with a device.