JPH04132201U - Accumulator device - Google Patents

Abstract

(57) [Summary] [Purpose] To effectively absorb the pulsation of a fluid with large pressure changes and to extend its life. [Structure] The inside of the shell 1 provided with the fluid inflow hole 12 is divided into upper and lower parts by a partition plate 3, and the opening guide wall 31 of the partition plate 3
A case 2 is held in a vertically movable manner. The case 2 is closed by a deformable bladder 21 and has a gas chamber A2 inside.
It becomes. A bladder 11 is provided above the partition plate,
The internal pressure of the gas chamber A1 behind it is higher than that of the gas chamber A2. When the fluid pressure is low, the bladder 21 is appropriately pressed and deformed, and deforms inwardly and outwardly in response to fluid pulsations to absorb the pulsations. When the fluid pressure increases, the stopper wall 41 of the valve plate 4
contacts the case side wall 22 to restrict the deformation of the bladder 21 and prevent its fatigue, and the case 2 is pressed and moved to apply fluid pressure to the bladder 11, causing it to be pressed and deformed appropriately. When the fluid pressure pulsates in this state, the bladder 21 deforms inwardly and outwardly to absorb the pulsations.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to an accumulator device, particularly for fluids whose pressure changes over a wide range. The present invention relates to a structural improvement of an accumulator device which is suitable for use as a battery.

0002

[Conventional technology]

Figure 2 shows an example of an accumulator installed in the hydraulic oil flow path of power steering. shows. The accumulator has an egg-shaped shell 1, in the upper half of which there is a A frame ring 51 shaped along the inner periphery of the frame ring 51 is housed therein. And a flexible hemispherical shape The rubber bladder 52 has its opening edge tightly fixed to the opening of the frame ring 51, and the rubber bladder 52 is tightly fixed to the opening of the frame ring 51. It is provided along the inner periphery of the lower half of the well 1. A through hole 13 in the top wall of the shell 1 is filled with air at a predetermined pressure. After enclosing the body, the plug member 14 is fitted and sealed to form a gas chamber A1. Also, The through hole 12 in the bottom wall of the well 1 is connected to the flow path wall of the hydraulic oil flow path.

0003 In an accumulator with such a structure, when hydraulic pressure is applied, the bladder 52 As shown in FIG. When the hydraulic pressure pulsates in this state, it deforms inward and outward accordingly and pulsates. absorb.

0004

[Problem to be solved by the invention]

By the way, the working oil pressure of power steering is usually 50 to 100 kg/cm2. When the pressure becomes particularly high, the bladder 52 moves inward greatly as shown in Figure 4. When the outer periphery has a large curvature and is deformed inward and outward to absorb pulsation in this state, There is a problem in that fatigue occurs at the edges and durability deteriorates. In this case, reduce the amount of deformation. If the internal pressure of gas chamber A1 is increased to reduce the pressure, pulsation absorption at low pressure will be effectively It will no longer be done.

[0005] The present invention solves this problem and is designed to solve the problem of pulsating fluids whose pressure range changes greatly. We provide an accumulator that can effectively absorb and reduce the The porpose is to do.

[0006]

[Means to solve the problem]

To explain the structure of the present invention, the accumulator has a deformable wall that partially has flexibility. Cases 1 and 2, each with pressure gas sealed inside, are arranged in multiple stages. While applying the fluid pressure of the pulsating fluid to the shaped walls 11 and 21, the case 1 in the latter stage The deformable wall 11 is brought into contact with the back of the case 2 in the previous stage, and Each case 2 except for the case 1 is held movably in the pressing deformation direction of each deformable wall 21. At the same time, regulating means 22 and 41 are provided to regulate the amount of deformation of each deformable wall 21 within a certain range. In addition, the sealed air pressure in each case 1 and 2 is increased sequentially from the previous stage to the latter stage. It's something I've lost.

[0007]

[Effect]

In the accumulator with the above configuration, when the fluid pressure is low, the sealed pressure is the lowest. The deformable wall 21 of the case 2 at the front stage is deformed by pressure, and changes inward and outward according to the fluid pulsation. shape to absorb and reduce pulsation. When the fluid pressure exceeds a predetermined value, the deformed wall 21 The deformation is regulated by the regulating means 22 and 41, and the case 2 receives fluid pressure and moves. , deforms the deformable wall 11 of the rear case 1 that comes into contact with the back surface thereof. Case 1 Since the sealed pressure inside Case 2 is higher than that of Case 2, the wall deforms due to the high fluid pressure. 11 is moderately pressed and deformed, and deforms inward and outward according to fluid pulsation to absorb pulsation. do.

[0008] Thus, as the fluid pressure increases, the deformed wall with higher enclosing pressure deforms appropriately. The shape of the deformed wall absorbs fluid pulsation well, and the deformable wall has a low sealing pressure. Since the shape is regulated to a certain limit, there is no reduction in life due to fatigue.

[0009]

【Example】

In FIG. 1, a case 1 is a spherical shell, and the inside of the shell 1 has an opening in the center. It is divided into upper and lower sections by a partition plate 3 having a partition plate 3. The opening periphery of the partition plate 3 is bent downward. It has a cylindrical guide wall 31, and a cage is vertically slidable inside the guide wall 31. Base 2 is provided. Case 2 has a container shape that opens downward, and the opening has a A flexible rubber bladder 21 is covered to form a deformable wall, and a gas at a predetermined pressure is contained inside. is enclosed to form a gas chamber A2.

0010 A valve plate 4 is provided with its center joined to the bladder 21 and abuts the fluid inflow hole 12. The outer circumferential edge of the valve plate 4 is bent upward to form a valve plate 4 facing the side wall 22 of the case 2. It serves as a topper wall 41.

[0011] In the upper half of the shell 1, a bladder 11 is arranged by dividing the internal space into upper and lower parts. , the airtight space above the bladder 11 has a gas chamber A whose pressure is higher than that of the gas chamber A2. It is 1. Then, the cover plate 111 buried in the center of the bladder 11 is inserted into the case. It is in contact with the back of the base 2. The partition wall 3 has upper and lower fluid chambers L1 and L2. A communicating through hole 32 is formed.

0012 In the accumulator having the above structure, fluid pressure is applied through the fluid inflow hole 12. Then, the valve plate 4 and the bladder 21 are moved until the pressures in the gas chamber A2 and fluid chamber L2 are balanced. It is pressed and deformed appropriately upward. If fluid pulsation occurs in this state, the As a result, the bladder 21 deforms up and down, absorbing the pulsation.

[0013] When the fluid pressure increases, the stopper wall 41 of the valve plate 4 comes into contact with the end surface of the side wall 22 of the case 2. This contact restricts the deformation of the bladder 21 and prevents the case 2 from moving upward. The fluid pressure is introduced into the fluid chamber L1 through the through hole 32. This allows high pressure Bladder 11 facing gas chamber A1 until the pressures of gas chamber A1 and fluid chamber L1 are balanced. When the fluid is pressed and deformed appropriately, and the fluid pulsates in this state, the above-mentioned brush changes accordingly. The drum 11 deforms up and down to absorb the pulsation.

[0014] Note that the case 2 is not limited to the above embodiment, and may be provided in multiple stages.

[0015]

[Effect of the idea]

As described above, according to the present invention, even if the fluid pressure changes over a wide range, each fluid pressure It is possible to reduce pulsation well by using the deformed wall, and it does not cause excessive deformation of the deformed wall. There is no decrease in durability.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an accumulator device showing an embodiment of the present invention.

FIG. 2 is a sectional view of a conventional accumulator device.

FIG. 3 is a schematic cross-sectional view showing the operation of a conventional accumulator device.

FIG. 4 is a schematic cross-sectional view showing the operation of a conventional accumulator device.

[Explanation of symbols]

1 shell (case) 11 Bladder (deformed wall) 12 Fluid inflow hole 2 cases 21 Bladder (deformed wall) 3 Partition plate 4 Valve plate

Claims (1)

[Scope of utility model registration request] Claim 1: Cases each having a partially flexible deformable wall and pressurized gas sealed inside are arranged in multiple stages, and fluid pressure of pulsating fluid is applied to the deformable wall of the first case. At the same time, the deformable wall of the subsequent case is brought into contact with the back surface of the preceding case, and each case except the last case is held so as to be movable in the pressing deformation direction of each deformable wall, and each deformed An accumulator device characterized in that a regulating means is provided for regulating the amount of deformation of the wall within a certain range, and the sealed air pressure in each of the cases is made higher sequentially in the latter stages than in the earlier stages.