JPH11150907A - Explosionproof rotating machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light and compact rotating machine. SOLUTION: An explosionproof rotating machine is equipped with a stator iron core 4 accommodated in a frame 1 of explosion-proof structure and having a stator winding 5, a rotor 8 fixed to a rotary shaft 6 attached through a bearing 7 to the frame 1, a terminal block 11 fixed to the frame 1, and a detector 9 attached to the shaft end of the rotary shaft 6. In this case, this is provided with a cover member 10 to cover the detector 9 and the terminal block 11 outside the frame 1, and the interior of the frame 1 and each accommodation space of the detector 9 and the terminal block 11 are made to communicate with each other. Accordingly, this is not provided with explosionproof space at the section to couple the frame 1 and the detector 9 and the terminal block 11, so this can be downsized.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressure-resistant explosion-proof rotary electric machine used in an explosive atmosphere.

[0002]

2. Description of the Related Art A conventional pressure-resistant explosion-proof rotary electric machine is configured as shown in FIG. In the figure, reference numeral 20 denotes a machine frame of a rotary electric machine having a flameproof structure, and a bracket 21 is fixed to an end face of the machine frame 20. Reference numeral 22 denotes a stator core. A stator winding 23 is wound around the stator core 22 and is mounted in the machine frame 20. Reference numeral 24 denotes a rotating shaft supported by a bearing 25 mounted on the bracket 21. 26 is a rotor fixed to the rotating shaft 23, 27 is a terminal block 27a for connecting the stator winding 23 to an external electric wire (not shown).
The terminal box has a pressure-resistant and explosion-proof structure and is mounted on the machine frame 20 and fixed. Reference numeral 28 denotes a detector container having a pressure-resistant structure fixed to the bracket 21 on the non-load side, in which a detector 29 is housed. The detector 29 is connected to the shaft end of the rotating shaft 24 on the non-load side. I have. 30
Is a terminal box of a detector, which is constructed in a flameproof structure and is mounted on and fixed to the detector container 28, and connects a detection winding of the detector 29 to an external control device (not shown). Stand 30
a is provided.

In a conventional explosion-proof rotary electric machine, a machine frame, a terminal box, a detector container and a terminal box of a detector are constructed in an explosion-proof structure and housed in separate containers. The joints were connected with explosion-proof gaps. For this reason, there were drawbacks that the external dimensions became large and the mass was heavy.
Therefore, an object of the present invention is to provide a light-weight and compact explosion-proof rotary electric machine.

[0004]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a stator core having a stator winding housed in a machine frame having a flameproof structure and a bearing connected to the machine frame via a bearing. An explosion-proof rotary electric machine comprising: a rotor fixed to an attached rotating shaft; a terminal block fixed to the machine frame; and a detector attached to a shaft end of the rotating shaft. A cover member that covers the detector and the terminal block is provided so that the inside of the machine frame and the respective storage spaces of the detector and the terminal block communicate with each other.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to FIGS.
It will be described based on. FIG. 1 is a side sectional view of an upper half of a pressure-resistant explosion-proof rotary electric machine according to an embodiment of the present invention. In the figure, reference numeral 1 denotes a machine frame of an explosion-proof rotary electric machine. Brackets 2 and 3 are fixed to an end face of the machine frame 1 and a through hole 12 is provided on an upper surface. Reference numeral 4 denotes a stator core.
And a stator winding 5 is wound around the inside of the machine frame 1. Reference numeral 6 denotes a rotating shaft supported by bearings 7 attached to the brackets 2 and 3. Reference numeral 8 denotes a rotor fixed to the rotation shaft 6. Reference numeral 9 denotes a detector which is connected to the shaft end of the rotating shaft 6 on the non-load side. Reference numeral 10 denotes a cover member,
Is mounted outside the machine frame 1 so as to cover the detector 9. Provided between the bracket 3 and the cover member 10,
A through hole 14 is provided for communicating the space covering the detector 9 with the space where the terminal block 11 is mounted. Reference numeral 11 denotes a terminal block attached to the inner surface of the cover member 10. This terminal block 1
1, the stator winding 5 is connected to an external electric wire (not shown), and the detection winding of the detector 9 is connected to an electric wire from an external control device (not shown). is there. Reference numeral 13 denotes a through hole provided in the end surface of the bracket 3 so as to communicate the inside of the machine frame 1 with the space in which the detector 9 is stored. To assemble the pressure-resistant explosion-proof rotary electric machine configured as described above, the stator core 4 having the stator winding 5 wound thereon is housed and fixed in the machine frame 1, and the rotating shaft 6 to which the rotor 8 is attached is attached to the brackets 2, 3 Fixed to the bearing 7. Next, the detector 9 is attached to the shaft end on the non-load side of the rotating shaft 6. Next, the cover member 10 is fixed to the machine frame 1 so as to cover the detector 9 outside the machine frame 1. The end of the stator winding 4 fixed to the machine frame 1 and the end of the external electric wire are screwed and fixed to the terminal block 11 to connect the stator winding 4 to the external electric wire. Further, the end of the detection winding from the detector 9 is connected to the terminal block 11 through the through hole 14. Therefore, the space inside the machine frame, the space accommodating the detector 9 and the space accommodating the terminal block 11 are communicated with each other, so that the size can be reduced without providing an explosion-proof gap.

[0006]

As described above, according to the present invention, a light-weight and compact explosion-proof rotary electric machine can be obtained.

[Brief description of the drawings]

FIG. 1 is a sectional side view of an upper half part of an explosion-proof rotary electric machine according to an embodiment of the present invention.

FIG. 2 is a sectional view of the upper half of a conventional flameproof rotary electric machine.

[Explanation of symbols]

1 machine frame, 2, 3 brackets, 4 stator core,
5 stator winding, 6 rotating shaft, 7 bearing, 8 rotor, 9 detector, 8a terminal block, 9 detector,
10 cover member, 12, 13, 14 through hole

Claims (1)

[Claims] 1. A stator core having a stator winding housed in an explosion-proof machine frame, a rotor fixed to a rotating shaft mounted on the machine frame via a bearing, and fixed to the machine frame. A terminal block, and a detector attached to a shaft end of the rotary shaft, wherein a cover member for covering the detector and the terminal block is provided outside the machine frame; A pressure-resistant explosion-proof rotary electric machine, wherein the inside and the respective storage spaces of the detector and the terminal block communicate with each other.