JPS62167901A - Constant pressure accumulator - Google Patents

Abstract

PURPOSE:To hold down a rate of pressure fluctuation to a small value with a small capacity accumulator by using the vapor of a substance showing a high saturated vapor pressure at the normal temperature as a pressure accumulating gas. CONSTITUTION:Vapor of flon is put in the lower vapor chamber of a reservoir 1 partitioned by a diaphragm 2, and the vapor chamber 6 is connected to an evaporation/condensation chamber 3 through a connecting pipe 9. A warmer 4 is provided in the evaporation/condensation chamber 3. In this arrangement, at the time of evaporation, the volume of vapor becomes several tens to several hundreds times the volume of saturated liquid, so that even if the capacity of an accumulator is small, a rate of pressure fluctuation can be held down to a small value.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Application Field The present invention relates to an akinimulator that stores and releases energy under constant pressure in a hydraulic generator.

(B) Conventional technology Conventional hydraulic accumulators contain high-pressure gas in a sealed container, and the hydraulic fluid in the hydraulic circuit enters into the container to balance the pressure of the gas, thereby generating hydraulic energy. This method uses a method to convert and store elastic energy due to changes in the compressed volume of gas.

(c) Problem 7 to be Solved by the Invention Oil from the hydraulic circuit enters the key mulrator and changes the volume of the sealing gas, but the rate of change in volume is proportional to the rate of change in pressure. The only way to keep the rate of change in pressure in the hydraulic circuit small is to increase the volume of the achievator or reduce the amount of accumulated oil. The purpose of this is to increase the volume of accumulated oil while suppressing the rate of pressure fluctuation using a small volume aquimulator.

B) Means for solving the problem To explain this invention based on the drawings, as shown in Fig. 1, a hydraulic circuit is operated from an oil pipe 8 to an oil chamber 7 on the upper side of a container 1 partitioned by a diaphragm 2. Add oil and let freon steam enter the lower steam chamber 6.

The lower steam chamber 6 is connected to the evaporation and condensation chamber 3 by a connecting pipe 9, and therein is a heat insulator 4 for heat storage, heat radiation, and heat radiation. A lid 10 located at the center of the diaphragm closes the opening of the connecting pipe 9 when the maximum amount of hydraulic oil has entered, and conversely closes the oil passage pipe 8 when the hydraulic oil runs out. In addition, a heat transfer tube 11 is installed in the heat insulator 4 to allow hot or cold water to pass therethrough, so that the temperature can be kept constant.

(e) Function This Akinimulator uses saturated vapor of fluorocarbons and carbon dioxide, which are substances that have a high saturated vapor pressure at room temperature.When the pressure increases, some of it condenses and becomes a liquid, reducing the volume and keeping it almost constant. It takes advantage of the property that it maintains a certain pressure, and when the pressure decreases, it starts to evaporate and maintains an almost constant saturation pressure.

The pressure of the hydraulic oil in the oil chamber 9 and the pressure in the steam chamber 6 are the same pressure. Hydraulic oil is supplied and the diaphragm 2 is depressed downward,
When the volume of the steam chamber 6 is reduced, the pressure of the steam increases, but some of the steam becomes dew, evaporates, and flows down to the condenser 3, keeping the pressure almost constant. A heat insulator 4 made of a solid material with a large heat capacity that releases heat at this time and generates dew droplets.
is placed in the evaporation and condensation chamber 3, and heat is dissipated there. Then, when the hydraulic fluid is returned to the circuit from the Akinimulator,
The volume of the steam chamber 6 expands and becomes low pressure, and the liquid that condensed earlier boils, acting to maintain the saturated pressure. In that case, the heat insulator 4 releases the heat received during the previous condensation. In the case of an Akinimulator, the stored energy and released energy are the same, so there is little temperature change, but the heat insulator 4
If a heat transfer tube 11 is provided in the tube and hot or cold water is flowed therein so as to heat or absorb heat when steam evaporates or condenses, responsive pressure adjustment can be achieved. As shown in Figure 2, there are various types of Akinimulators, such as Bragg type and piston type, but their functions are the same.

(f) Effects of the Invention Since the volume of steam when evaporated is several tens to hundreds of times larger than that of saturated liquid, even if the volume of the Akinimulator is small, the volume can be fully utilized. This is to convert hydraulic energy into thermal energy, store it, and release it.This allows the rate of pressure fluctuation to be kept low considering the size of the accumulator device.

Claims (2)

[Claims] 1. Using the vapor of a substance that exhibits a high saturated vapor pressure at room temperature as the pressure storage gas, the vapor changes its own volume by condensing and evaporating the pressure fluctuations that occur in the accumulator as hydraulic oil enters and exits. This is a hydraulic constant pressure accumulator that utilizes the property of working to maintain constant pressure. 2. The constant pressure accumulator according to claim 1, wherein when steam condenses and evaporates, a heat insulator 4 having a built-in device for heating or cooling is provided in the evaporation and condensation chamber 3 so that heat can be rapidly radiated and absorbed.