JPH0323821Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The present invention integrates the driving part and the power generation part in a generator driven by compressed air for supplying electric power to a control device, etc. This article relates to a generator that can increase output and be smaller and lighter.

(Prior Art) In recent years, in process control of chemical plants and the like, so-called optical transmission systems have been frequently used for data transmission between measuring devices, monitoring devices, control devices, and the like. The optical transmission system is superior in terms of safety and noise resistance compared to conventional systems for transmitting electrical signals, and is an extremely convenient system for chemical plants and the like that require explosion-proof properties.

In the optical transmission system, a pneumatic generator driven by compressed air is housed in the case body of the measuring device or control device to serve as a power supply device, and each device constituting the system is connected to the generator. The necessary power is supplied to the

However, all conventional generators driven by compressed air have a structure in which an independent air motor and a generator are simply directly connected, and the disadvantage is that the equipment is large compared to the output value. Ta.

Additionally, in order to increase the output of the generator, if a separate cooling fan is installed or compressed air is used to cool the generator, the amount of compressed air used will increase and the air supply source will need to be large. There is a problem in that it leads to

(Problems to be solved by the invention) The present invention solves the above-mentioned problems in conventional compressed air driven generators, such as the difficulty in reducing the size and weight of the generator and improving operating efficiency. The purpose of this invention is to provide a generator driven by compressed air that is small in size, has high operating efficiency, and has excellent explosion-proof properties.

(Means for Solving the Problems) The present invention provides a generator driven by compressed air, which is provided with a compressed air supply port and a plurality of air discharge ports, and has a clean and dry air source from the compressed air supply port. A case body to which compressed air is supplied; a partition plate provided with a plurality of air jet nozzles disposed on the compressed air supply port side of the case body; An impeller rotates by the airflow ejected from the ejection nozzle, a generator rotor fixed to the spindle of the impeller, and a generator rotor arranged around the outer circumference of the rotor, which generates a large amount of air in the axial direction. The basic structure of the invention is a generator stator provided with a flow path.

(Operation) Compressed air supplied into the case body from the compressed air supply port is ejected from the air jet nozzle toward the impeller, imparting kinetic energy to the impeller and causing it to rotate.

The rotation of the impeller generates an electromotive force in the armature coil of the generator, and in the case of a power supply device for a control device, this is supplied to each control device via a stabilized power supply circuit.

After imparting kinetic energy to the impeller, the airflow flows in the axial direction through the airflow passage and the like, and is led out from the air outlet.

The airflow flowing in the axial direction within the case body is
It cools the stator and rotor of the generator, and maintains the pressure inside the case body higher than atmospheric pressure during power generation, thereby enhancing its internal pressure explosion-proofing effect.

(Example) The drawing is a longitudinal sectional view of a generator driven by compressed air according to the present invention. In the figure, reference numeral 1 denotes a cylindrical case body, and a side plate 3 provided with a compressed air supply port 2 and a side plate 5 provided with an air discharge port 4 are fixedly installed on both sides of the case body.

Reference numeral 6 denotes a partition plate fitted inside the case body 1, and an air chamber 7 is formed between it and the side plate 2. Further, a plurality of air jet nozzles 8 are attached to the partition plate 6.

The air ejection nozzle 8 ejects air at a predetermined pressure and a predetermined flow rate toward the front, and although not shown, has a structure in which its diameter and ejection angle can be automatically adjusted.

Reference numeral 10 denotes an impeller rotatably supported inside the partition plate 6, and is fixed to an end of a rotor support shaft 13 of the generator supported by bearings 11 and 12.

14 is a rotor of the generator consisting of a field core, etc., and 15 is a stator of the generator consisting of an armature core, an armature coil, etc., and is fixed inside the case body 1. .

In this example, a rotating magnetic pole type self-excited single-phase AC generator is used, but the type of generator,
Of course, the structure etc. may be of any kind.

In addition, since the structure of the generator itself is publicly known,
In this embodiment, a detailed explanation of the structure of the generator will not be given.

When starting the generator, clean and dry compressed air A for instrumentation, adjusted to a predetermined pressure by a pressure regulator (not shown), is supplied from the compressed air supply port 2, and a predetermined amount of compressed air is supplied from the nozzle 8. Compressed air A is ejected and hits the impeller 10 to drive it to rotate.

The speed of the impeller 10 is controlled by adjusting the diameter of the nozzle 8 to adjust the flow rate and pressure of the ejected air, or by adjusting the ejection angle of the nozzle to adjust the direction of the ejected air flow.

Note that the impeller 10 may have a structure in which the pitch angle of the blades can be freely adjusted, and the speed of the impeller may be controlled by adjusting the pitch angle of the blades.

The airflow after imparting kinetic energy to the impeller 10 flows in the axial direction through the airflow passage 17 provided inside the stator and the gap between the stator 15 and the rotor 14, and is then discharged from the air outlet 4. It is discharged to the outside.

(Effects of the invention) In this invention, the impeller is attached to the support shaft of the generator rotor, and the drive part and power generation part of the generator are integrated, making it possible to significantly reduce the size and weight of the generator. becomes.

In addition, since an impeller is installed inside the case body and the driving air is forced to flow in the axial direction and discharged outside the case body, the air flow can be effectively used as a cooling medium for the generator, and the air for cooling can be used separately. This eliminates the need to supply water or provide other cooling means, improving operating efficiency, and by keeping the inside of the case at a pressure higher than atmospheric pressure at all times during power generation.
Explosion resistance is also improved. As mentioned above, the present invention has excellent practical utility as a power source for optical transmission systems such as process control of chemical plants.

[Brief explanation of the drawing]

The drawing is a longitudinal sectional view of a generator driven by compressed air according to an embodiment of the present invention. 1... Case body, 2... Compressed air supply port,
3, 5... Side plate, 4... Air outlet, 6... Partition plate, 8... Air jet nozzle, 10... Impeller, 1
3... Support shaft, 14... Rotor, 15... Stator.

Claims (1)

[Scope of utility model registration request] a case body including a compressed air supply port and a plurality of air discharge ports, and to which clean and dry compressed air is supplied from the compressed air supply port; a partition plate provided with an air ejection nozzle; an impeller rotatably supported on the inside of the partition plate and rotated by the air flow ejected from the air ejection nozzle; A generator driven by compressed air, comprising a generator rotor; and a generator stator disposed around the outer periphery of the rotor and provided with a large number of airflow passages in the axial direction.