JPS61229978A - Pressure generating device by working fluid - Google Patents

Abstract

PURPOSE:To make operation of working fluid at high cycle frequency with reduced heat loss and shortend response time by operating a working liquid less influenced by temperature change by working fluid which changes its volume by cooling and heating, and driving a motor by the working liquid. CONSTITUTION:A piston 2 is arranged to make sliding motion freely inside a cylinder 1 having a heat insulating wall 16 on its inner face. A working liquid 5 such as a working oil or the like with little influence caused by temperature change is received on one side of the piston 2 inside the cylinder 1, and so is a working fluid 4 such as a two-phase fluid or the like which expands by heat on the other side. And, the working fluid 4 is reciprocally heated or cooled by a heating body 7 or a cooling body 8 to be shrunk or expanded in order to drive the piston 2. Pressure is transitted to the working liquid 5 by the operation of the piston 2, and a motor is operated by the working liquid 5 by the above mechanism.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention involves sealing a working fluid in a liquid or gas-liquid two-phase state in a container, and changing the pressure inside the container by heating and cooling the working fluid. This relates to a device for extracting force.

Generally, a fixed amount of pure liquid (working fluid) in a container
When the container is sealed and kept in a sealed state, the inside of the container is filled only with the liquid and its vapor. Therefore, when the container is heated from the outside to raise the temperature of the liquid, the liquid evaporates, the amount of vapor inside the container increases, and the vapor pressure increases. Conversely, if it is cooled, the amount of vapor releases the latent heat taken away during vaporization to the outside, condenses, and returns to liquid. Therefore, the vapor pressure within the container will drop. When a liquid undergoes such a phase change of evaporation or condensation, the relationship between its temperature level, latent heat, vapor pressure, specific volume, etc. is given as a physical property value characteristic of the liquid. However, the vapor pressure exhibits an exponential increase as the temperature rises, and even a slight temperature change generates a large force due to the vapor pressure. This occurs not only in the case of a two-phase gas-liquid system, but also in the case where the container is completely sealed as a liquid, resulting in a large pressure change due to a change in the volume of the liquid.

(Prior art) There are two to three types of pressure generators and power units that use two-phase fluids in principle, but these conventional examples do not allow evaporation or condensation through heating and cooling. The working fluid directly acts on cylinders, motors, etc. to operate them.

However, when the working fluid is led to a place far away from the heat source and cooling source, the working fluid that should have been heated may cool down on the way, or conversely, the working fluid that should have been cooled may be heated due to residual heat on the way. However, the phase change of evaporation and condensation of the working fluid takes time, resulting in a long response time. Therefore, it is limited to application in very limited fields, and cannot be used as a power source with a particularly high cycle frequency.

(Problems to be Solved by the Invention) As described above, when directly operating a cylinder, motor, diaphragm, special expansion body, etc. with a working fluid that is heated or cooled, the response is due to poor insulation with the surroundings. This method has the disadvantage that it takes a long time, which is a big problem especially when the vapor pressure generated from the working fluid is introduced to a location considerably distant from the heat source or cooling source.

The present invention was developed to solve this problem, and provides a pressure generating device that can operate a cylinder or the like far away from a heat source or cooling source at a high cycle frequency.

(Measures to solve the problem) When directing working fluid to a cylinder or motor, etc., ignore heat transfer between the inner walls of the cylinder and heat transfer to and from conduits leading to the cylinder or motor, regardless of the degree of heat transfer. This inevitably results in longer response times. Therefore,
In the present invention, a hydraulic fluid that directly acts on the cylinder or the motor is used separately from the working fluid, and pressure fluctuations in the working fluid actuate the hydraulic fluid through a piston or the like made of a highly insulating material. Therefore, the working fluid always flows at a constant temperature without being affected by temperature changes of the working fluid, and acts without being affected by heat in conduits or the like along the way. Although the hydraulic fluid is not particularly limited, it is common to use a hydraulic fluid with a low viscosity.

Hereinafter, two to three embodiments of the pressure generator according to the present invention will be described in detail based on the drawings.

(Example) Fig. 3 shows a specific example of the working fluid pressure generating device according to the present invention, in which a piston Q) is installed inside a cylinder c/).
is built in, the piston c2) is slidable in the axial direction of the cylinder (1), and a seal is attached to the outer periphery to prevent leakage between the inner walls of the cylinder ψ. The piston C) divides the inside of the cylinder V) into two parts, and the left side is injected with working fluid -) and the right side is filled with a working fluid drain. Due to evaporation, condensation or expansion, the piston Q) slides in the cylinder tray) and causes the working fluid to flow out and into the outlet). Therefore, there is a heating element (7) in the working fluid (goods).
A cooling body chain is attached to the working fluid to heat and cool the working fluid. Additionally, a spring may be installed near the outlet port to facilitate the return process of the piston (2).

FIG. 2 shows another embodiment in which, unlike the case of FIG.
> Guided to the inside, while cooling utilizes the cavity (ll) existing on the outer periphery of the cylinder (/) and perose (IQ),
This is done by the coolant flowing in and out from the cooling port (/2).

FIG. 1 shows yet another embodiment, in which a perose (10) having heat insulating properties is used.
0) A working fluid (externally) is sealed between the volume tW (/3) and the volume tW (/3). Furthermore, due to the spring characteristics of the peroz (10'), the return process can be speeded up. In this case, the pressure rising due to the heating of the working fluid (stop) compresses the perrows (10), resulting in axial contraction of the perrows (10).
The hydraulic fluid σ) inside flows out toward the outlet and the hydraulic fluid is sent out.

On the other hand, Figure 4 shows the movable end of the perose (10) and the piston (#) rod () installed in the cylinder (/l).
/7), and is a device that increases the pressure of the working fluid acting on the perose (10), which has a large cross-sectional area, with a piston (/j), which has a small cross-sectional area.

The internal space of the Peroz CIO") is a cavity (//), and the cavity (/l) follows the change in internal volume as the Peroz (10) expands and contracts, and is used as a working fluid) and a working fluid σ). Prevents heat transfer between

Furthermore, FIG. 5 shows that a second perose (70-b) is attached to the inside of the perose (70-a) shown in FIG. )
A second working fluid (+-b) is sealed in a space formed by a second perose (10-1+) and a second perose (10-1+). Due to external heating, the working fluid (1l-a) increases in pressure and volume as the temperature rises, and this change is caused by Peroz < 1o
-a>, working fluid (g-t+>, and further Peroz (1
0-b) to the hydraulic fluid drain). By appropriately setting the type and amount of the working fluid (≠-b) in response to changes in temperature, pressure, and volume transmitted from the working fluid (4!-a), the amount of the working fluid (1) to be delivered can be controlled. Various changes in flow rate and pressure can be obtained.

As described above, the working fluid pressure generating device according to the present invention uses the working fluid q) and the working fluid σ), and evaporates it by heating and cooling.
Pressure from the working fluid (t) where it condenses or changes in volume is transmitted to the working fluid (t) and applied to cylinders, motors, diaphragms, special expansion bodies, etc. via the working fluid (1). You can obtain the following effects.

(Effects) (1) The working fluid pressure generating device of the present invention heats and cools the working fluid only in extremely limited areas, has an excellent heat insulation effect, and prevents heat from entering and exiting from other parts. Since the generated pressure is transmitted to the working fluid without any temperature change, the response time is short and it is possible to operate with a high cycle frequency.

Therefore, the hydraulic fluid discharged from the cylinder Q)
can operate without any problem even if the cylinder ω is far away from the cylinder ω by installing piping, and since the heat source is not specified, it can be used not only in the natural world and the universe, but also in automobiles,
It is fully possible to use it as a concentrated or distributed expansion pressure generator for electric trains and even large structures.Also, when the working fluid is used in a completely liquid state, a small temperature change will generate a large pressure, which is also relatively small. Temperature changes in the high pressure region can exhibit significant pressure fluctuations.

(2) Also, since the () does not act directly on the working fluid,
Heat is not transferred to the motor, cylinder, and expansion body, so there is no possibility of temperature rise in the actuator, etc.

(3) Especially as shown in Figure 1, Peroz (10)
When a working fluid (9) is sealed between the container (13) and the outside of the perose (10), the perose (10) has a higher pressure resistance against external pressure than the internal pressure, and the pressure resistance is higher in the compressed state due to the expanded state. The life of the Perows (10) is extended, and if the hydraulic fluid is also sealed inside the Perows (10), pressure balance can be maintained between the working fluids.

(4) The working fluid pressure generating device of the present invention can also be applied as a sensor. For example, in the case of a pressure sensor, the temperature of the working fluid is kept constant and changes in pressure from the outside can be detected as a change in volume (displacement), and in the case of a temperature sensor, the temperature change can be detected as a change in volume (displacement). ! (
It can be extracted as a change in displacement).

(5) Furthermore, when the device is applied as a spring, fluctuations in pressure (load) change volume (displacement),
In particular, if the working fluid is used in the wet steam region, a large stroke change can be obtained with a constant load, and the spring constant Wk
(spring characteristics) can be easily changed by changing the working fluid temperature.

In addition to these, applications as dampers and accumulators are also fully possible.

[Brief explanation of drawings]

FIGS. 1 to 5 show different embodiments of the two-phase fluid pressure generating device according to the present invention. (ha(/ll)...Cylinder (2/s)...
・Piston J...Seal CII)...
・・Hydraulic fluid drain）・・・・Hydraulic fluid 2)・・Φ
・・Outlet (7)・・・・Heating body chain・−〇Cooling body (wa) lIII・・Φ spring (10
)... Peroz (//) Φ... Hollow (
/2) II...Cooling port (/3)...Container
(/6)・・・Insulating wall (17)・・・Rod patent applicant Takeshi 1) Book I.

Claims (3)

[Claims] (1) The working fluid is sealed in a container, and the volume fluctuation that occurs when the working fluid is heated or cooled is transmitted to the working fluid via a bellows or piston, etc., and the working fluid is guided to create pressure outside. A pressure generating device using a working fluid, characterized in that it provides: (2) A pressure generating device using a working fluid according to claim 1, wherein the working fluid is used in a gas-liquid two-phase state. (3) A pressure generating device using a working fluid according to claim 1, wherein a complete liquid is used as the working fluid.