JPS6341818Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is a series ventilated mandrel stator, that is, a mandrel stator formed by stacking silicon steel plates one by one to form a single stator.This invention is fixed to the stator frame of a rotating machine. This relates to the child mounting structure.

Conventionally, as shown in FIGS. 1 and 2, a stator 2 of a series ventilation type rotating machine 1 has ribs 7 attached to an outer frame 3 at arbitrary intervals in the circumferential direction via ring-shaped brackets 4 and 5. After being press-fitted into the inner periphery of the rib 7 of the stator frame 6, it is welded, and as a result, the rotating machine 1 has the following:
Cooling air sucked in from the intake port formed at one end of the outer frame 3 passes through a plurality of ventilation ducts 8 formed in the stator 2 between the ring-shaped bracket 4 on the intake side and the other end of the stator 2. from the space between the ribs 7 to the space between the outer frame 3 and the ribs 7 between the other end of the stator 2 and the ring-shaped bracket 5 on the exhaust side. A ventilation path is formed that reaches the space between each rib 7 formed by the outer frame 3 and exits to the outside through an exhaust port formed at the other end of the outer frame 3. The weight of the stator 2 and the force generated during operation are supported while ensuring a ventilation path from the stator to the fan 9.

However, in this case, in order to press-fit the stator 2 into the inner periphery of the rib 7 of the stator frame 6, the entire inner circumference of the ring-shaped brackets 4, 5 and the rib 7 must be press-fitted in accordance with the external shape of the stator 2. The stator 2 must be machined with high accuracy to the required dimensions, and since there are many machined surfaces and the machining accuracy is high, it requires a considerable number of man-hours to attach the stator 2 to the stator frame 6.
The ribs 7, which are important strength members of the stator frame 6, require sufficient dimensions even after machining, so the ribs 7 require large material dimensions with sufficient cutting allowance during can manufacturing. As a result, the production cost of the rotating machine 1 increases considerably.

The purpose of this invention is to install the stator of a series of ventilated rotating machines, which can reduce the production cost of rotating machines by reducing the number of machining steps required to install the stator while ensuring the necessary ventilation channels and sufficient strength. The object of the invention is to eliminate the drawbacks of the prior art by providing a structure.

Next, the configuration of an embodiment of the present invention is shown in FIGS. 3 and 4.
This will be explained using figures.

The ribs 15 of the stator frame 14 are formed by attaching a plurality of ribs 15 at arbitrary intervals in the circumferential direction between the ring-shaped brackets 12 and 13 attached to the outer frame 11 of the series ventilation type rotating machine 10. Stator 1
When the intake side (left side in the figure) end plate 17 of the stator 16 is opposed to the intake side bracket 12, a ring-shaped joint plate 19 is welded to a position facing the exhaust side (right side in the figure) end plate 18 of the stator 16. When the stator frame 14 is formed, the inner periphery of the intake side bracket 12 and joint plate 19 is set to the outer shape of the stator 16, in this case, the stator 16
Machining, including step machining, is performed with the precision required for press-fitting in accordance with the external shape of the end plates 17 and 18 at both ends.

After this machining, the end plates 17, 1 of the stator 16 are
8 is the air intake of the stator frame 14, in this case, the stator frame 14 is formed by attaching a plurality of ribs 15 at arbitrary intervals in the circumferential direction between the ring-shaped brackets 12 and 13 attached to the outer frame 11. side bracket 12
is press-fitted into the inner surface of the joint plate 19 and fixed by welding.

As a result, the entire outer periphery of the stator 16 does not need to be machined with high precision to accommodate press-fitting, and the ribs 15 can be attached to the stator frame 14 without having sufficient machining allowance during can manufacturing. It can be easily installed, and in this case, although the joint plate 19 is required when installing the stator 16, the material dimensions of the rib 15 can be made the same as the product dimensions.
The actual material cost is considerably reduced compared to the conventional embodiment shown in FIGS. 1 and 2, and the amount of high-precision machining required for press-fitting the stator 16 into the stator frame 14 is also significantly reduced. Therefore, the number of processing steps is greatly reduced, and since press-fitting becomes easy, the number of assembly steps is also reduced, and the production cost of the rotating machine can be considerably reduced.

Moreover, in this mounting structure, since the dimension between the outer frame 11 and the ribs 15 is sufficiently secured, cooling air is drawn in from the ventilation passage, in this case, the intake port 23 formed at one end of the outer frame 11. is stator 1
The ring-shaped bracket 12 on the intake side and the ring-shaped joint plate 1 are connected through a plurality of ventilation ducts 20 formed in 6.
9, and from the space between the ribs 15 through the space between the outer frame 11 and the ribs 15 to the ring-shaped connecting plate 19 and the ring-shaped bracket 13 on the exhaust side. The space between the ribs 15 formed between the cooling air generating fan 21, which is rotatably mounted between the ends of the cylindrical outer frame 11 together with the stator 16 and a pair of rotors 22, and the outer frame. Among the ventilation passages that exit to the outside through the exhaust port 24 formed at the other end of the stator 16,
The effective cross-sectional area of the ventilation path from the ventilation duct 20 to the fan 21 through the stator frame 14 can be secured with a margin corresponding to the required cooling air volume,
Further, by using the ring-shaped joint plate 19 as a piece-shaped joint plate that is attached independently to each rib 15, the effective cross-sectional area of the ventilation passage can be further increased.

In the rotating machine 10 configured in this manner, when the fan 21 rotates together with the rotor 22, the cooling air sucked in from the intake port 23 formed at one end of the outer frame 11 is transferred from the rotor 22 to the ventilation duct of the stator 16. 20, a ventilation passage of the stator frame 14 including between each rib 15, that is, a ventilation passage formed between the ring-shaped bracket 12 and the ring-shaped joint plate 19 on the intake side from the plurality of ventilation ducts 20 formed in the stator 16. each rib 15
From the space between the outer frame 11 and the space between the ribs 15, the ring-shaped joint plate 19 and the ring-shaped bracket 1 on the exhaust side.
The air is discharged from an exhaust port 24 formed at the other end of the outer frame 11 through a ventilation path passing through a space between each rib 15 formed between the outer frame 11 and the fan 21 .

Next, the effects of the present invention will be explained.

In the present invention, a stator 16 is attached to the inner peripheral position of the cylindrical outer frame 11, and a rotor 22 paired with the stator 16 and a fan 21 for generating cooling air can be rotated between both ends of the cylindrical outer frame 11. An intake port 2 formed at one end of the cylindrical outer frame 11 by being attached to the rotor 22 and rotating the fan 21 together with the rotor 22.
In the series ventilation type rotary machine 10, which discharges the cooling air taken in from the cylindrical outer frame 11 to the outside from the exhaust port 24 formed at the other end of the cylindrical outer frame 11, the stator is attached to the inner circumferential surface of the cylindrical outer frame 11. ring-shaped brackets 12 installed at intervals of at least the axial length of 16;
A rib 15 is provided between the ring bracket 1 and the ring bracket 1.
2 and 13 at arbitrary intervals in the circumferential direction, and furthermore, a joint plate 19 attached to the rib 15 and end plates 17 and 18 attached to both ends of the stator 16 to the ring-shaped bracket 12 on the intake side. The stator 16 is attached to the cylindrical outer frame 11 by fitting and welding, and the cooling air taken in from the intake port 23 passes through a plurality of ventilation ducts 20 formed in the stator 16 to the above-mentioned air intake side. The ring reaches the space between the ribs 15 formed between the ring-shaped bracket 12 and the joint plate 19, and passes from the space between the ribs 15 through the space between the outer frame 11 and the ribs 15. A ventilation path is formed that reaches the space between the ribs 15 formed between the joint plate 19 and the ring-shaped bracket 13 on the exhaust side, and further passes through the cooling air generation fan 21 and exits to the exhaust port 24. The stator mounting structure of the ventilated rotating machine series has
As a result, the present invention eliminates the need for highly accurate machining of the entire outer periphery of the stator 16 to accommodate press-fitting, and furthermore, the ribs 15 do not have sufficient machining allowance during can manufacturing, and the stator Since it can be easily attached to the frame 14 and the amount of high-precision machining required for press-fitting the stator 16 into the stator frame 14 is significantly reduced, the number of machining steps is also significantly reduced.
In addition, since press-fitting becomes easier, the number of assembly steps is reduced, and the production cost of the rotary machine can be considerably lowered. In addition, the necessary ventilation passages and strength can be ensured sufficiently.

[Brief explanation of the drawing]

Figure 1 is a partially cutaway side view of a conventional embodiment;
3 is a partially cutaway side view of an embodiment of the present invention, and FIG. 4 is an enlarged detailed view of the main parts. 10... Rotating machine, 11... Outer frame, 12, 13...
... Bracket, 14 ... Stator frame, 15 ... Rib, 16 ... Stator, 17, 18 ... End plate, 19
... Joint plate, 20 ... Ventilation duct, 21 ... Fan, 22 ... Rotor, 23 ... Intake port, 24 ...
exhaust port.

Claims (1)

[Scope of utility model registration request] A stator 16 is attached to the inner peripheral position of the cylindrical outer frame 11, and the stator 1 is attached between both ends of the cylindrical outer frame 11.
An intake port 23 is formed at one end of the cylindrical outer frame 11 by rotatably attaching a rotor 22 and a cooling air generation fan 21 paired with the rotor 22 and rotating the fan 21 together with the rotor 22. In the series ventilation type rotary machine 10, which discharges cooling air sucked in from the cylindrical outer frame 11 to the outside from an exhaust port 24 formed at the other end of the cylindrical outer frame 11, the stator 16 is provided on the inner peripheral surface of the cylindrical outer frame 11. A plurality of ribs 15 are attached between the ring-shaped brackets 12 and 13 that are attached at an interval equal to or more than the axial length of the ring-shaped brackets 12 and 13 at arbitrary intervals in the circumferential direction of the ring-shaped brackets 12 and 13, and further attached to the ribs 15. The stator 16 is attached to the cylindrical outer frame 11 by fitting and welding the end plates 17 and 18 attached to both ends of the stator 16 to the joint plate 19 and the ring-shaped bracket 12 on the intake side. The cooling air sucked in from the port 23 cools the stator 16.
The ring-shaped bracket 12 and the joint plate 19 on the intake side are connected through a plurality of ventilation ducts 20 formed in the
from the space between the ribs 15 to the space between the ribs 15 formed between the outer frame 1 and the outer frame 1.
1 and the rib 15 to the ring-shaped joint plate 19 and the ring-shaped bracket 13 on the exhaust side.
Fixing of a series ventilation type rotary machine characterized in that a ventilation path is formed which reaches the space between each of the ribs 15 formed between the cooling air generating fan 21 and exits to the exhaust port 24. Child mounting structure.