JPH07224801A - Accumulator - Google Patents

Abstract

PURPOSE:To provide an accumulator which can sufficiently discharge fluid in a fluid chamber without blocking the inlet/outlet for fluid by a poppet, in the condition of the poppet in contact with the opening circumference of the inlet/outlet for fluid. CONSTITUTION:In an accumulator provided with a poppet which is fitted to a bladder 3 in contact with the opening circumference 4b of the inlet/outlet for fluid, the poppet 5 is provided with projection 5e in contact with the opening circumference 4b, so that the poppet 5 is not in the whole contact with the opening circumference 4b by being supported with the projection 5e.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION This invention relates to accumulators.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 4, a bladder 21 made of a flexible material is made of a non-flexible material at the center of one surface of the bladder 21 so as not to bite into the fluid inlet / outlet port 22 when discharging a fluid. An accumulator equipped with a poppet 23 is known.

However, in this conventional accumulator, the opening peripheral portion 22a of the fluid inlet / outlet port 22 and the one surface 23a of the poppet 23 which is in contact with the opening peripheral portion 22a.
Since both and are formed flat, when the poppet 23 comes into contact with the opening peripheral portion 22a, the fluid inlet / outlet 23 is closed by the poppet 23, and thus the fluid chamber 24
A part of the fluid (not shown) may be trapped in the fluid and the fluid may not be ejected.

[0004]

SUMMARY OF THE INVENTION In view of the above points, the present invention prevents the fluid inlet / outlet from being blocked by the poppet while the poppet is in contact with the peripheral portion of the opening of the fluid inlet / outlet.
An object of the present invention is to provide an accumulator capable of sufficiently discharging the fluid in the fluid chamber. Further, in order to achieve this object, it is another object of the present invention to provide an accumulator having a small number of processing steps and a low processing cost.

[0005]

In order to achieve the above object, the accumulator of the present invention is an accumulator provided with a poppet that is attached to a bladder and abuts on a peripheral portion of an opening of a fluid inlet / outlet. I decided to provide a protrusion that contacts the part.

[0006]

If the poppet is provided with a protrusion that abuts the periphery of the opening of the fluid inlet / outlet, when the poppet abuts the periphery of the opening, the protrusion serves as a support so that one surface of the poppet faces the aperture. It is prevented from contacting the entire surface of the poppet, and a gap is formed between the poppet and the periphery of the opening as a fluid discharge passage.

[0007]

Embodiments of the present invention will now be described with reference to the drawings.

As shown in FIG. 1, a bladder 3 made of a flexible material is erected inside a shell 1 with a holder 2 and one end (upper and lower ends) of the shell 1 is narrowed to a port member 4 there. Is fixed. A fluid inlet / outlet 4a is provided in the center of the port member 4, and a poppet 5 made of a non-flexible material is attached to the center of one surface (upper and lower surfaces in the drawing) of the bladder 3.

As shown in FIGS. 2 and 3, the poppet 5
Is fixed to the bladder 3 in a semi-embedded state by integrally forming a retaining projection 5c at the center of one surface (upper surface in the figure) 5b having a disk shape.
On the other surface (upper and lower surfaces in FIG. a) 5d, a protrusion 5e is provided at a position slightly offset from the center (a portion other than the center of the bottom of the poppet 5) toward the upper and lower sides in the figure opposite to the retaining projection 5c. ing. The other surface 5d of the poppet body 5a is flat, and the projection 5e is provided on this flat surface.

The accumulator fills the gas (not shown) from the gas plug 6 into the gas chamber 7 with a predetermined filling pressure, while connecting the port member 4 to the fluid pipe (not shown) and flowing in the pipe. A fluid (not shown, for example, lubricating oil) is introduced into the fluid chamber 8 through the fluid inlet / outlet 4a, and when pulsation occurs in this fluid, the pulsation is absorbed by the balance action of the enclosed gas pressure and the fluid pressure. . When the poppet 5 comes into contact with the opening peripheral edge portion 4b of the fluid inlet / outlet 4a in the process of discharging the fluid from the fluid chamber 8 to the piping side, the projection 5e serves as a support, and the other surface 5d of the poppet body 5a surrounds the opening peripheral portion 4b. Contact with the entire surface is blocked, and the poppet 5 and the opening peripheral portion 4b are prevented.
A gap 9 serving as a fluid discharge channel is formed between the two. Therefore, since the fluid in the fluid chamber 8 can be sufficiently discharged from the gap 9, the fluid inlet / outlet 4a is blocked by the poppet 5 and a part of the fluid is confined in the fluid chamber 8 as in the conventional case. As a result, it is possible to prevent a situation in which the fluid cannot be discharged.

The shape, size and arrangement of the projection 5e are not particularly limited, but the purpose of providing the projection 5e is to obtain the poppet 5
As long as it does not contact the entire area around the opening 4b,
When the poppet 5 comes into contact with the opening peripheral portion 4b, the projection 5
There is no problem if e is fitted in the fluid inlet / outlet 4a. Therefore,
As described above, when one projection 5e is provided, it is preferable to provide this projection 5e at a position slightly offset from the center of the poppet 5. It is also effective to provide a plurality of protrusions 5e. When a plurality of protrusions 5e are provided in this way, even if one protrusion 5e fits into the fluid inlet / outlet port 4a,
It is preferable that the protrusions 5e are spaced apart from each other so that the other protrusions 5e do not fit into the fluid inlet / outlet 4a and act as a support.

The projection 5e is extremely easily formed by pressing when the poppet 5 is made of metal or the like. For example, a milling cutter for forming a groove on the other surface 5d of the poppet body 5a. Compared with the processing by, the processing man-hour is small and the processing cost is low.

[0013]

The present invention has the following effects. That is, first, when the poppet comes into contact with the periphery of the opening of the fluid inlet / outlet, the supporting action of the projection prevents one surface of the poppet from entirely contacting the periphery of the opening, and the gap between the poppet and the periphery of the opening is prevented. A gap serving as a fluid discharge channel is formed in the. Therefore, since the fluid in the fluid chamber can be sufficiently discharged from this gap, the fluid inlet / outlet is blocked by the poppet and a part of the fluid is confined in the fluid chamber to discharge the fluid, as in the conventional case. It is possible to prevent a situation in which it is impossible to occur. Secondly, since the protrusion is extremely easily molded by pressing, etc., the number of processing steps is small when molding this protrusion,
Processing cost is low.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of an accumulator according to an embodiment of the present invention.

[Figure 2] Vertical cross-section of the poppet

[Figure 3] Bottom view of the poppet

FIG. 4 is a vertical sectional view of an accumulator according to a conventional example.

[Explanation of symbols]

 1 shell 2 holder 3 bladder 4 port member 4a fluid inlet / outlet 4b opening peripheral part 5 poppet 5a poppet main body 5b one surface 5c retaining projection 5d other surface 5e protrusion 6 gas plug 7 gas chamber 8 fluid chamber 9 gap

Claims (1)

[Claims] 1. An accumulator having a poppet (5) attached to a bladder (3) and abutting an opening peripheral portion (4b) of a fluid inlet / outlet (4a), wherein the poppet (5) has an opening peripheral portion (4). An accumulator characterized in that it is provided with a protrusion (5e) that abuts against 4b).