JPS6036721Y2 - Rotary expander with starter - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a rotary expander equipped with a starter device.

In a rotary expander that is configured to form an expansion chamber for introducing fluid, such as steam, between an external rotor and an internal rotor that rotate in conjunction with each other, the external rotor is connected to an air supply valve for an air supply port provided in a casing, that is, a casing. It is configured to fulfill the role of

In this case, the external rotor, including its interlocking parts, has a fairly large moment of inertia, and since it is hermetically sealed against the internal rotor and the casing, the frictional resistance of the seal and bearings is quite large, resulting in rotational resistance during startup. is large.

Therefore, at startup, if the rotor's rotational speed increases and the rotational inertia does not reach a certain level, mechanical loss due to frictional resistance will cause the non-porous outer circumference of the external rotor to stop the air supply port in a cold position. become.

As a countermeasure against this problem, conventionally, a starter device is provided outside the rotary expander to externally provide enough rotational force to continuously open and close the air supply port.

FIG. 1 shows a schematic arrangement of one example, in which a driven mechanical device is connected to the rotary expander a, and a motor C of a starting device is connected via a clutch d.

Therefore, the overall structure becomes large, and after starting, a device and operation for disconnecting the starting device from the expander using a clutch d or a changeover switch e are required, resulting in a complicated device structure and high cost.

The present invention has the drawbacks of the prior art described above.

The present invention has been made to solve the above-mentioned drawbacks of the prior art, and includes providing a circumferential packet row section or a blade row section near the outer periphery of the side edge of the external rotor of the rotary expander. The present invention is characterized in that a nozzle for spraying fluid is provided as a starting device, that is, the rotary expander has a built-in starting device that is simple in structure and operation.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to embodiments shown in the accompanying drawings.

The structure of the rotary expander itself is not a feature of the present invention, but the feature of the present invention lies in the improvement of its drawbacks, but an outline thereof will be explained below.

Figures 2 and 3 show the main parts of a rotary expander, in which an external rotor 2 is supported rotatably around its axis with a sliding gap within a casing, that is, a casing 1; An internal rotor 3 is rotatably mounted about an eccentric axis, each having four recesses and three
The two protrusions are interlocked and rotate in the direction of the arrow by gears (not shown) at a speed ratio of 3:4, and the two parts maintain contact to define a transformation space 4, that is, an expansion chamber.

The casing 1 is provided with an air supply port 5 for a two-phase fluid of water vapor and hot water or a working fluid of water vapor, and an internal/external communication port 6 is provided at the bottom of the recess of the external rotor. The water vapor flows into the transformation space, the space volume expands during partial rotation, the water vapor expands, torque acts on the internal rotor 3 due to the water vapor pressure, and later, when the communication port 6 matches the exhaust lower provided in the passenger compartment, the water vapor expands. The water vapor is discharged.

According to the present invention, as shown in FIGS. 4 and 5, the external rotor 2 has packets 9 dug in the vicinity of its outer periphery, in this example, on the outer periphery of the flange-shaped side edge 8. A nozzle 10 facing the packet 9 is provided on the compartment 1 side and connected to a conduit 12 having a fluid supply valve 11.

The nine rows of packets can be a row of blades protruding from the outer periphery of the side edge.

In the present invention, upon startup, when the fluid supply valve 11 is opened and pressure fluid, for example, water vapor, which is the same as the working fluid, is sprayed from the nozzle 10 to the 9 rows of packets through the pipe 12, the external rotor 2 rotates together with its interlocking parts. Then, the rotational inertia reaches a certain value or more, and the external rotor 2 enters a continuous rotation state in which the working fluid supply port 5 can be continuously opened and closed.

After activation is thus performed, it is only necessary to close the fluid supply valve 11.

Air/water two-phase fluid can also be used as the starting pressure fluid.
The waste steam generated from the starting fluid joins with the waste steam of the working fluid coming out of the exhaust lower and is led out of the machine.

Other fluids such as pressurized water and compressed air can be used as the starting fluid, and a waste fluid discharge section can be provided independently as required.

According to the present invention, since the nine rows of packets are located at the large radius position of the rotating part of the expander, the starting torque is large and it is possible to start the expander smoothly.

Therefore, there is no need for an external starting device C that is complicated in structure and operation, and there is no need to provide a new casing for the rotary expander, resulting in a simple structure and low installation costs.

Moreover, since the working fluid of the rotary expander can be used as it is as the starting pressure fluid, various effects such as no need to separately install electrical equipment can be obtained.

[Brief explanation of drawings]

Fig. 1 is a layout diagram of a conventional rotary expander device, Fig. 2 is a side view of the main components of the rotary expander, Fig. 3 is a sectional view of the main parts of the rotary expander, and Fig. 4 is a diagram of the present invention. FIG. 5 is a partial cross-sectional view of the centerline half of the embodiment, and FIG. 5 is a side view of the cross-section of the packet row portion. 1... Vehicle interior, 2... External rotor, 3.
...Inner rotor, 4...Transformation space, 5.
...Air supply port, 6...Communication port, 7...
...Exhaust port, 8...Side edge, 9...Packet, 10...Nozzle, 11...Fluid supply valve, 12... ...Pipe line.

Claims (1)

[Scope of utility model registration request] In a rotary expander that forms an expansion chamber for introduced fluid between an external rotor and an internal rotor that rotate in conjunction with each other, nine rows of circumferential packets or blade rows are provided near the outer periphery of the external rotor, and fluid is blown into this part. A rotary expander with a starter equipped with a nozzle 10 for attachment.