KR20040029615A - A High Pressure Hose Using Spiral Tuner Hose Construction For Reducing Pressure Ripple - Google Patents

Abstract

PURPOSE: A pulsation reducing high-pressure hose by using a spiral tuner hose is provided to improve the pulsation reducing performance of the hose by properly selecting the length of a wavelength interference section and accordingly to increase noise-reduction performance. CONSTITUTION: A pulsation reducing high-pressure hose(110) by using a spiral tuner(120) is composed of a hose inlet connecting pipe(130) mounted to the end outside of the high-pressure hose and connected with a spiral tuner hose; an intermediate nipple(150) installed with being separated from the inner end of the spiral tuner at 10¯200mm; and a hose outlet connecting pipe(140) separated from the intermediate nipple and installed to the outside of the other end of the high-pressure hose. In addition, a metal pipe having a predetermined length is connected to the outside of the hose outlet connecting pipe and a metal pipe outlet connecting pipe is connected to the end of the metal pipe.

Description

High Pressure Hose Using Spiral Tuner Hose Construction For Reducing Pressure Ripple

The present invention relates to a method of designing a high pressure hose using a spiral tuner, and more particularly, to the pulsation reduction of the high pressure hose used for piping of vane pumps and other hydraulic equipment as well as automotive power steering. The present invention relates to a high pressure hose for pulsation reduction using a spiral tuner hose that can be widely used.

1 is a configuration diagram showing a conventional single-stage spiral pulsation reducing hose structure.

As shown in FIG. 1, a high pressure hose 10 having a spiral tuner 20 generally includes a hose inlet connector 30 and a hose outlet connector 40 at both ends. . The high pressure hose 10 using the spiral tuner 20 is arranged in the high pressure hose 10 by placing a spiral tuner 20 on the basis of the branch pipe theory. An annular chamber is formed between the 20 and the high pressure hose 10.

This induces the generation of echo waves in the annular chamber and the interference of the waves due to the phase difference between the echo and input waves in the wavelength interference section between the spiral end and the nipple (or bracket). Reduce the pulsating pressure by using offset. At this time, the pulsation pressure is reduced for a specific frequency by adjusting the spiral length.

2A is an internal structural diagram of a pulsation reducing high pressure hose 10 of a single spiral structure using a conventional spiral tuner, and FIG. 2B is a diagram of a pulsation reducing high pressure hose 10 of a double spiral structure using a conventional spiral tuner. Internal structure diagram.

2A and 2B, the high-pressure hose 10 for pulsation reduction using the spiral tuner 20 uses both a structure of one spiral (Fig. 2A) and a structure of two pieces (Fig. 2B). The former is called a one-spin spiral structure and the latter is called a two-spin spiral structure.

Looking at the operation and structure of the high-pressure hose 10 for pulsation reduction using the spiral tuner 20 having the structure as described above, the spiral acts as a turning pipe for the pulsating wave of the high-pressure hose (10). By the quarter-wave ( λ ) branching principle.

That is, when the spiral length is 1/4 of the pulsation pressure wavelength λ , the phase of the echo wave generated in the annular chamber has a phase difference of π with the pulsation pressure wave passing through the spiral.

In addition, since the two pressure waves encountered in the wavelength interference section cancel each other, the high pressure hose 10 using the spiral tuner 20 serves to reduce the pulsation pressure of a specific wavelength or a specific frequency.

When designing the high pressure hose 10 using the spiral tuner 20, the length of the spiral is determined according to the speed of the pulsation pressure wave, the physical properties of the hose material, the hose inner diameter, and the turning pulsation frequency.

The velocity of the pulsating pressure wave was calculated by GM (US 3323305, US05495711) as shown in Equation a below.

here,

c : speed of sound,

: Propagation velocity of wave in oil,

D: inner diameter of Hose,

K: Bulk Modulus,

E: Young's Modulus

The design of the length of the spiral (Spiral) is designed for a specific frequency. For example, if the hydraulic source is a vane chamber of 10 vane pumps and the rotation speed is 660 rpm, the 10th pulsation frequency of the pump becomes 110.0 Hz. In the case of selecting this as the turning frequency, the spiral length is calculated as follows.

<Formula a> the calculation with respect to wavelength when (Vo = f / λ, frequency = wavelength of the sound speed / transmission wave in the medium) <Equation b> a, and then the 1/4 λ min, such as the formula Branch pipe spiral calculations (US 3323305, US05495711) can be obtained.

here,

f : control frequency,

n = 0,1,2,3 ... (integer)

Substituting the properties in Equation b and calculating the spiral length when n = 0, L = 53 (mm), n = 1, L = 160 (mm), and n = 2, L = 265 (mm).

Therefore, in the case of the pulsating 20th order component, since the wavelength is half of the 10th order component wavelength, the length of the spiral for catching the 20th order component pulsation should be half the length of the primary spiral.

In addition, in the case of using the double-spired spiral structure, the first spiral is tuned to the 20th pulsation component and the length of the secondary spiral is twice the length of the primary spiral. Can be controlled.

The secondary spiral can be a spiral design that can control the 20th component of the pulsation. This was found in (US 05728981) filed by Dayco.

3 is a schematic structural diagram of a high pressure hose for reducing pulsating pressure using a conventional spiral tuner.

As shown in FIG. 3, the design principle of the pulsation pressure reducing high pressure hose 10 using the conventional spiral tuner 20 is the length L2 of the wavelength interference interval considering only ⓐ pulsation pressure and ⓑ pulsation pressure. Was approximately 25.4 mm (1 inch) or randomly determined according to the required hose length.

Here, ⓐ pulsating pressure is the pulsating pressure passing through the spiral, ⓑ pulsating pressure is the pulsating pressure reciprocating through the spiral tuner 20 section, that is, the annular chamber section.

That is, in the conventional invention, the length of the wavelength interference interval is about 25.4 mm (1 inch), or it is determined according to the required hose length determined according to the layout of the hydraulic line.

By simplifying the propagation path of the pulsating pressure wave passing through the spiral, the effect of the length L2 of the wavelength interference interval on the pulsation reduction was overlooked.

Therefore, the length of the wavelength interference zone is simply set according to the required length of 25.4 mm (1 inch) or the hose length, there is no theoretical and experimental explanation for this.

However, the length of the wavelength interference zone has a great influence on the propagation path of the pulsating pressure wave and the reflection wave generation in the annular chamber section. Therefore, the pulsation reduction performance and noise reduction performance of the pulsation reduction high pressure hose 10 using the spiral tuner 20 can be improved by appropriately setting the length of the wavelength interference interval. Therefore, further research is required.

Accordingly, the present invention has been made in view of the above-described conventional problems, and the first object of the present invention is to reduce the length of the wavelength interference interval, which has been overlooked at the time of designing a high-pressure hose for pulsation reduction using a spiral tuner. By selecting appropriately, a high pressure hose for pulsation reduction using a spiral tuner hose which can improve the pulsation reduction performance of a pulsation reducing high pressure hose using a spiral tuner is provided.

In addition, the second object of the present invention is to improve the pulsation reduction performance of the high-pressure hose for pulsation reduction using a spiral tuner by appropriately setting the length of the wavelength interference interval, the spiral tuner hose that can improve the noise reduction performance It is to provide a high-pressure hose for pulsation reduction to use.

Objects of the present invention, one end of the high pressure hose 110 is provided with a hose inlet pipe 130 connected to the spiral tuner 120 hose; An intermediate nipple 150 mounted at a distance of 10 mm to 200 mm from an inner end of the spiral tuner 120 hose; And a hose outlet connector 140 spaced apart from the intermediate nipple 150 by a predetermined distance and provided at the other end of the high pressure hose 110, to the high-pressure hose for pulsation reduction using a spiral tuner hose, comprising: Is achieved.

And, the hose inlet connecting pipe 130 is provided at one end of the high pressure hose 110; An intermediate nipple 150 mounted at a predetermined distance from the hose inlet connection 130 and connected to a spiral tuner 120 hose; And a hose outlet connecting pipe 140 provided at the other end of the high pressure hose 110 at a distance of 10 mm to 200 mm from the inner end of the spiral tuner 120 hose. It is achieved by a high-pressure hose for pulsation reduction using.

In addition, the hose inlet connecting pipe 130 is provided on one end of the high-pressure hose 110 and the spiral tuner 120 hose is connected; A hose outlet connector 140 mounted to improve a reduction performance of a specific frequency component pulsation with a distance of 10 mm to 200 mm from the inner end of the spiral tuner 120 hose; A metal pipe 160 of a predetermined length connected to the outside of the hose outlet connecting pipe 140; And it is achieved by a high-pressure hose for pulsation reduction using a spiral tuner hose, characterized in that it; and a metal pipe outlet connecting pipe 170 connected to the end of the metal pipe 160.

In addition, the hose inlet pipe 130 is provided on one end of the high-pressure hose 110 and the spiral tuner 120 hose is connected; A metal pipe 160 of a predetermined length connected to the outside of the hose inlet connecting pipe 130; A metal inlet connecting pipe 165 connected to an end of the metal pipe 160; By the high-pressure hose for pulsation reduction using a spiral tuner hose, characterized in that it comprises; and a hose outlet connecting pipe 140 is spaced apart 10mm ~ 200mm distance from the inner end of the spiral tuner 120 hose Is achieved.

In addition, the hose inlet pipe 130 is provided at one end of the high-pressure hose 110 and the first spiral tuner 120 hose is connected; A first intermediate nipple (150a) mounted at a distance of 10 mm to 200 mm from an inner end of the first spiral tuner (120a) hose; A second intermediate nipple (150b) mounted at a predetermined distance from the first intermediate nipple (150a) and having a second spiral tuner (120b) hose connected to one side thereof; And a hose outlet connecting pipe (140) provided at the other end of the high pressure hose (110) at a distance of 10 mm to 200 mm from the end of the second spiral tuner (120b) hose. A high pressure hose for pulsation reduction using a hose is achieved.

And, the hose inlet connecting pipe 130 is provided at one end of the high pressure hose 110; A first intermediate nipple (150a) connected to the hose of the first spiral tuner (120a) spaced apart from the hose inlet connector (130) by a predetermined distance; A second intermediate nipple (150b) having a distance of 10 mm to 200 mm from an end of the first spiral tuner (120a) hose and having a second spiral tuner (120b) connected to a hose at one side thereof; And a hose outlet connector 140 provided at the other end of the high pressure hose 110 at a distance of 10 mm to 200 mm from the end of the second spiral tuner 120b hose. It is achieved by a high-pressure hose for pulsation reduction using.

In addition, the hose inlet connecting pipe 130 is provided at one end of the high-pressure hose 110, the first spiral tuner 120 hose is connected; A first intermediate nipple (150a) provided with a distance of 10 mm to 200 mm from an inner end of the first spiral tuner (120a) hose and having a second spiral tuner (120b) connected to a hose at one side thereof; A second intermediate nipple (150b) provided at a distance of 10 mm to 200 mm from an end of the second spiral tuner (120b) hose; And a hose outlet connecting tube 140 provided at the other end of the high pressure hose 110 spaced apart from the second intermediate nipple 150b by a predetermined distance; for pulsation reduction using a spiral tuner hose comprising a It is achieved by a high pressure hose.

In addition, the first high-pressure hose (110a) for embedding the first spiral tuner (120a) hose on one side; A hose inlet connecting pipe 130 provided at one end of the first high pressure hose 110a in which the first spiral tuner 120a is installed; A hose outlet connector 140 mounted at a distance of 10 mm to 200 mm from an inner end of the first spiral tuner 120a hose; A metal pipe 160 having a predetermined length further connected to one side of the hose outlet connecting pipe 140; And a hose inlet connecting pipe 130 connected to the other end of the metal pipe 160 is provided outside one end of the second high pressure hose 110b in which the second spiral tuner 120b hose is installed, and the second high pressure hose ( For pulsation reduction using a spiral tuner hose, including; a hose outlet connecting pipe 140 mounted at a distance of 10 mm to 200 mm from the end of the second spiral tuner 120b hose built in 110b). It is achieved by a high pressure hose.

In addition, the hose inlet pipe 130 is provided at one end of the high-pressure hose 110 and the first spiral tuner 120 hose is connected; An intermediate nipple 150 provided with a distance of 10 mm to 200 mm from the inner end of the first spiral tuner 120a and the second spiral tuner 120b connected to one side of the hose; A hose outlet connector 140 having a distance of 10 mm to 200 mm from an end of the second spiral tuner 120b hose; A metal pipe 160 of a predetermined length connected to the outside of the hose outlet connecting pipe 140; And it is achieved by a high-pressure hose for pulsation reduction using a spiral tuner hose, characterized in that it; and a metal pipe outlet connecting pipe 170 connected to the end of the metal pipe 160.

Other objects, specific advantages and novel features of the present invention will become more apparent from the following detailed description and the preferred embodiments associated with the accompanying drawings.

1 is a configuration diagram showing a conventional single-stage spiral pulsation reducing hose structure,

2A is a diagram illustrating an internal structure of a high-pressure hose for reducing pulsation of a single stage spiral structure using a conventional spiral tuner.

2b is an internal structure diagram of a high-pressure hose for reducing pulsation of a double spiral structure using a conventional spiral tuner;

3 is a schematic structural diagram of a high pressure hose for reducing pulsating pressure using a conventional spiral tuner;

Figure 4 is a block diagram showing the structure of a hose spiral pulsation reducing hose structure for controlling the length of the wavelength interference interval using the nipple according to the present invention,

Figure 5 is a block diagram showing the structure of a hose spiral pulsation reduction hose structure for controlling the length of the wavelength interference interval using a metal tube according to the present invention,

6 is a schematic structural diagram of a high pressure hose for reducing pulsating pressure using a spiral tuner according to the present invention;

Figure 7a is a structural diagram according to the addition of the middle nipple of a single spiral structure according to the present invention,

7b is a structural diagram according to the addition of a metal tube of a single spiral structure according to the present invention;

Figure 7c is a structural diagram according to the addition of the middle nipple of the double-stranded spiral structure according to the present invention,

Figure 7d is a structural diagram according to the addition of a metal tube of a double spiral structure according to the present invention.

<Description of the symbols for the main parts of the drawings>

10: high pressure hose 20: spiral tuner (Spiral Tuner)

30: hose inlet connector 40: hose outlet connector

50: middle nipple

110: high pressure hose 110a: first high pressure hose

110b: second high pressure hose 120: spiral tuner (Spiral Tuner)

120a: first spiral tuner 120b: second spiral tuner

130: hose inlet connector 140: hose outlet connector

150: middle nipple 150a: first intermediate nipple

150b: second intermediate nipple 160: metal tube

165: metal pipe inlet connector 170: metal pipe outlet connector

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

Figure 4 is a block diagram showing the structure of a single spiral pulsation reduction hose structure for controlling the length of the wavelength interference interval using the nipple according to the present invention, Figure 5 is a length of the wavelength interference interval using a metal tube according to the present invention Fig. 1 shows the structure of the hose structure for reducing spiral pulsation.

As shown in FIG. 4 and FIG. 5, in the present invention, spiral is selected by appropriately selecting the length of the wavelength interference interval that has been overlooked during the design of the pulsation-reducing high-pressure hose 110 using the existing spiral tuner 120. It shows a design method that can improve the pulsation reduction performance of the high-pressure hose 110 for pulsation reduction using a tuner (Spiral Tuner) (120). In general, the high pressure hose 110 uses a rubber hose using rubber of elastic material as a response to the pulsation.

The length and role of spiral have been well known in previous studies, and the fact that spiral acts as a turning pipe for the pulsation of the high pressure hose 110 is based on the 1/4 λ branch principle. By.

When applied to a single spiral structure, it is possible to maximize the reduction effect of a specific order component or to reduce the pulsation 10, 20, 30 order components.

In other words, it is possible to reduce the pulsation 10, 20, and 30th order components, which were only possible with the existing double-stranded spiral structure, even with the single-stranded spiral structure. The cost savings can be obtained by using it in place.

In addition, when the present invention is applied to a double spiral structure, the pulsation reduction performance may be further improved or the pulsation reduction frequency may be greatly increased.

The design principle of the high-pressure hose 110 for pulsating pressure reduction using the spiral tuner of the present invention is as follows.

6 is a schematic structural diagram of a high pressure hose for pulsating pressure reduction using a spiral tuner according to the present invention.

As shown in Fig. 6, the design principle of the present invention considers ⓒ pulsating pressure in addition to ⓐ and ⓑ pulsating pressure, and considers the effect of the length of L2 on ⓑ pulsating pressure and, if necessary, in the middle of the hose. Nipple 150 (or bracket, orifice) is added to set the optimum L2 length.

Here, ⓐ pulsating pressure is the pulsating pressure passed through the spiral, ⓑ pulsating pressure is the pulsating pressure reciprocating through the spiral tuner 20 section, that is, the annular chamber section, ⓒ pulsating pressure is the annular chamber section and the wavelength interference section Is the pulsating pressure.

In addition, L1 refers to the length of the spiral tuner 120, that is, the length of the annular chamber (Chamber), L2 refers to the length of the wavelength interference interval.

In general, the length of the wavelength interference zone is about 25.4 mm (1 inch) or it is determined according to the required hose length determined by the layout of the hydraulic line.

However, in the present invention, the effective range of the length of the wavelength interference section is proposed to be 10 mm to 200 mm.

In other words, when the length of the wavelength interference section is less than 10 mm, the wavelength interference section is insufficient, so that the wave canceling effect does not sufficiently occur, and the wave progresses smoothly in the annular chamber section between the spiral and the hose. It is a factor that cannot be achieved, which interferes with the generation of echoes.

In addition, when the wavelength interference interval is 200 mm or more, the pulsation reduction performance is deteriorated because it does not prevent the wave from passing through the spiral and thus does not induce the wave to the annular chamber section.

Therefore, the length of the wavelength interference zone is selected in the range of 10 mm to 200 mm depending on the design purpose. At this time, if it is impossible to adjust the length of the hose, the length of the wavelength interference interval is adjusted by adding a nipple 150 (Nipple) or reducing the length of the hose and forming a pipe of the required length using the metal tube 160. .

7A to 7D show the effect of pulsation reduction performance according to the adjustment of the length of the wavelength interference interval by adding the intermediate nipple 150 of the spiral structure and the metal tube 160 of the spiral structure as described above. Explain through.

Figure 7a is a structural diagram according to the addition of the intermediate nipple of the single spiral structure according to the present invention, Figure 7b is a structural diagram according to the addition of a metal tube of the single spiral structure according to the present invention.

And, Figure 7c is a structural diagram according to the addition of the intermediate nipple of the double-stranded spiral structure according to the present invention, Figure 7d is a structural diagram according to the addition of the metal tube of the double-threaded spiral structure according to the present invention.

7a, 7b, 7c, and 7d, as shown in FIG. 7a, first, a) of 7a is provided with a hose inlet pipe 130 at one end of the high pressure hose 110, and a spiral tuner at the hose inlet pipe. 120 The hose is connected.

In addition, 10mm ~ 200mm distance from the inner end of the spiral tuner 120 hose is provided with an intermediate nipple 150 (Nipple) for improving the performance of reducing the specific frequency component pulsation. In addition, the intermediate nipple 150 is spaced a predetermined distance from the other end of the high pressure hose 110, the hose outlet connecting pipe 140 is provided with a structure of the high pressure hose (110).

In addition, b) of Figure 7a is provided with a hose inlet connection tube 130 on one end of the high-pressure hose 110, the hose inlet connection 130 and a predetermined distance apart from the hose and the spiral tuner 120 hose Connected intermediate nipples 150 are provided.

In addition, the spiral tuner 120 has a structure that is provided with a hose outlet connecting pipe 140 which is spaced apart from the inner end of the hose 10mm is provided on the other end of the high-pressure hose 110.

In addition, a), b) of FIG. 7B is a structure in which the metal pipe 160 is further connected. First, a) of FIG. 7B shows a hose inlet connecting pipe connected with a spiral tuner 120 hose at one end of the high pressure hose 110. 130 is provided, and the hose outlet connector 140 is mounted at a distance of 10 mm to 200 mm from the inner end of the spiral tuner 120 hose.

Then, the metal pipe 160 of a predetermined length connected to the outside of the hose outlet connecting pipe 140 is mounted, the metal pipe outlet connecting pipe 170 is connected to the end of the metal pipe 160.

In addition, b) of FIG. 7B is provided with a hose inlet pipe 130 to which a spiral tuner 120 hose is connected at one end of the high pressure hose 110. Then, the metal tube 160 of a predetermined length is connected to the outside of the hose inlet connector 130, the metal tube inlet connector 165 is provided at the end of the metal tube 160.

In addition, 10mm ~ 200mm distance from the inner end of the spiral tuner 120 hose is a structure that the hose outlet connecting pipe 140 is mounted.

In addition, FIGS. 7C and 7D are double spiral structures in which a spiral tuner 120 hose is further connected, and a single spiral structure described in FIGS. 7A and 7B is connected in series.

That is, in FIG. 7C, a hose inlet connector 130 is provided at one end of the high pressure hose 110, and a hose of the first spiral tuner 120 is connected to the hose inlet connector. The first intermediate nipple 150a is mounted at a distance of 10 mm to 200 mm from the inner end of the hose of the first spiral tuner 120a.

In addition, a second intermediate nipple 150b connected to a hose of the second spiral tuner 120b is mounted on a side of the first intermediate nipple 150a at a predetermined distance.

In addition, the second spiral tuner (120b) is 10mm ~ 200mm distance from the end of the hose is spaced apart from the other end of the high pressure hose 110, the hose outlet connecting pipe 140 is provided with a structure.

In this manner, b) of FIG. 7C is provided with a hose inlet connector 130 at one end of the high pressure hose 110, and is spaced apart from the hose inlet connector 130 by a predetermined distance to the first spiral tuner 120a. The first intermediate nipple 150a is connected to the hose.

In addition, a second intermediate nipple 150b having a second spiral tuner 120b further connected to a hose at one side is provided with a distance of 10 mm to 200 mm from the end of the hose of the first spiral tuner 120a.

In addition, a 10mm ~ 200mm distance from the end of the hose of the second spiral tuner (120b) is a structure in which the hose outlet connecting pipe 140 is provided at the other end of the high pressure hose (110).

In addition, c) of FIG. 7C is provided with a hose inlet pipe 130 to which a first spiral tuner 120 hose is connected at one end of the high pressure hose 110.

In addition, a first intermediate nipple 150a in which a second spiral tuner 120b is further connected and mounted on one side of the first spiral tuner 120a is spaced apart from the inner end of the hose by 10 mm to 200 mm. .

In addition, a 10mm ~ 200mm distance from the end of the hose of the second spiral tuner (120b) is provided with a second intermediate nipple (150b), a predetermined distance away from the second intermediate nipple (150b) the high pressure hose The other end of the 110 is the hose outlet connector 140 is provided with a structure.

In addition, a), b) of Figure 7d is a structure of a double spiral with a metal tube 160, first a) of Figure 7d is a first high-pressure hose (110a) with a built-in hose of the first spiral tuner (120a) Hose inlet connector 130 is provided on the outside of the one end, the first spiral tuner (120a) 10mm ~ 200mm distance from the inner end of the hose is provided with a hose outlet connector 140.

The metal outlet 160 of a predetermined length is further connected to one side of the hose outlet connector 140, and the hose inlet connector 130 is connected to the other end of the metal tube 160. In addition, the hose inlet connecting pipe 130 is provided on the outer side of one end of the second high pressure hose (110b) in which the second spiral tuner (120b) hose is built.

In addition, the hose outlet connection pipe 140 is mounted in a distance of 10 mm to 200 mm from the end of the second spiral tuner 120b hose built in the second high pressure hose 110b.

In addition, b) of FIG. 7D is provided with a hose inlet connecting pipe 130 to which a first spiral tuner 120 hose is connected to one end of the high pressure hose 110, and an inner side of the hose of the first spiral tuner 120a. A distance from 10 mm to 200 mm from the end is spaced apart so that the second nipple tuner 120b has an intermediate nipple 150 to which a hose is further connected.

In addition, a hose outlet connecting pipe 140 is provided at a distance of 10 mm to 200 mm from the end of the hose of the second spiral tuner 120b.

In addition, the metal outlet 160 of a predetermined length is connected to the outside of the hose outlet connecting pipe 140, the end of the metal pipe 160 is provided with a metal pipe connection pipe 170.

In addition, the effect according to the length of the wavelength interference interval in various structures as described above are as follows.

(1) The shorter the length of the wavelength interference interval, the more the target frequency and its (2n x 1) times the harmonic component frequency when selecting the spiral length (where n = 0, 1, 2, .. The pulsation reduction performance is improved.

This is because the shorter the length of the wavelength interference zone helps the generation of pulsation pressure 2) of FIG. 3 and the phase of pulsation pressure 3) is closer to the phase of pulsation pressure 2).

(2) As the length of the wavelength interference zone gets closer to the spiral length, the pulsation reduction performance of 1/2 frequency of the target frequency and its (2n x 1) times harmonic component frequency is improved. This is because, in FIG. 3, the phase difference between the 3) pulsation pressure and the 1) pulsation pressure at 1/2 frequency approaches π.

(3) The frequency at which the pulsation reduction performance is improved by selecting the length of the wavelength interference section is calculated from the following equation.

here,

f ' : control frequency,

n = 1,2,3 .... (positive integer)

(4) The longer the wavelength interference interval, the lower the pulsation reduction performance at the target frequency and its (2n x 1) times harmonic component frequency when spiral length is selected. This is because the generation of the pulsation pressure of 2) of FIG. 3 is not smoothly performed.

In addition, the length of the wavelength interference interval in the design of the pulsation reduction high pressure hose 110 using the spiral tuner 120 can be selected as follows within the 10 mm ~ 200 mm section according to the purpose.

(1) In case of single station spiral structure

Example 1 As an example of selecting an optimal nipple 150 position for improving pulsation pressure reduction performance at a pulsation reduction target frequency of a spiral, the length of the wavelength interference interval is set to 10 mm.

Example 2) Pulsating Pressure Reduction Performance As an example in which the optimum nipple 150 position is selected to widen the effective frequency range, the spiral length is set in accordance with the upper limit of the effective frequency range.

The length of the wavelength interference interval is set according to Equation 1 according to the lower limit of the effective frequency range.

Example 3 As an example of selecting the optimum nipple 150 position in order to reduce the 10th, 20th and 30th pulsation components, the length of the spiral is set in accordance with the 20th pulsation component.

The length of the wavelength interference zone is set to twice the spiral length.

(2) In case of 2 stations spiral structure

Example 4 As an example of selecting an optimum nipple 150 position in order to improve the pulsation pressure reduction performance at the pulsation reduction target frequency of the first and second spirals, the lengths of the first and second wavelength interference sections are all set to 10 mm. do.

Example 5) Pulsating Pressure Reduction Performance As an example of selecting an optimum nipple 150 position to widen the effective frequency range, the first and second spiral lengths are set in accordance with the upper limit of the effective frequency range.

The length of the first and second wavelength interference zones is set in accordance with Equation (1) according to the lower limit of the effective frequency range.

Example 6) As an example of selecting an optimal nipple 150 position in order to reduce the 10, 20, 30, 40, 50, and 60th pulsation components, the length of the primary spiral is set in accordance with the 20th pulsation component. Reduces pulsating components of the car.

The length of the secondary spiral is set in accordance with the tenth pulsation component to reduce the tenth, thirty, and fifty pulsation components.

The length of the primary and secondary wavelength interference zones is set in accordance with 1/3 or 1/6 of the 40th order component frequency.

In order to prove the effect of the present invention as described above, the comparative example designed by the existing technology and the embodiment designed according to the present invention was compared.

That is, test samples of three comparative examples designed according to the existing technology and three embodiments designed using the present invention were manufactured and pulsating pressure tests were performed, and each sample was subjected to a power steering system of a vehicle. The indoor noise test of the vehicle was performed.

First, as a comparative example,

(1) In case of single station spiral structure

Comparative Example 1) An example of turning the spiral length to the pulsation reduction target frequency and not selecting an optimal nipple 150 for adjusting the wavelength interference interval length.

(2) In case of 2 stations spiral structure

Comparative Example 2) An example of turning the length of the first and second spirals to a pulsation reduction target frequency and not selecting an optimal nipple 150 for adjusting the length of the first and second wavelength interference intervals.

The test results according to the results are shown in the comparative test result table of <Table 1>.

The specifications and test results of each sample used in the test are shown in <Table 1>. In the pulsating pressure test and the vehicle test, the rotation speed of the pump is 700 rpm, which is the same as the rotation speed of the vehicle.

As shown in the test results shown in Table 1, the power steering system is optimized by optimizing the length of the wavelength interference section through the addition of the middle nipple 150 of the pulsation reducing high pressure hose 110 using the spiral tuner 120. It can be seen that the pulsating pressure reduction effect of the same hydraulic system is improved.

In addition, by optimizing the length of the wavelength interference interval through the addition of the middle nipple 150 of the high-pressure hose 110 for pulsation reduction using the spiral tuner 120, it can be seen that the vehicle interior noise by the power steering system is significantly reduced.

In addition, as shown in the test results of Improvement 2, the 10th, 20th, and 30th component pulsating pressures and corresponding indoor noise of the vehicle are effectively reduced with the single-spiral high-pressure hose 110, which was not possible with the conventional design method. It can be seen that.

In addition, it can be seen from the above results that it has a double spiral structure and can effectively reduce 10, 20, 30, 40, 50, 60 and higher order pulsating components and vehicle interior noise.

As described above, according to the high-pressure hose for pulsation reduction using the spiral tuner hose according to the present invention, the spiral tuner is used by appropriately selecting the length of the wavelength interference interval that has been overlooked when the high-pressure hose for pulsation reduction using the spiral tuner is selected. It is possible to improve the pulsation reduction performance of the high pressure hose for pulsation reduction.

In addition, by appropriately setting the length of the wavelength interference interval, it is possible to improve the pulsation reduction performance of the high-pressure hose for pulsation reduction using a spiral tuner, thereby improving the noise reduction performance.

In addition, by optimizing the length of the wavelength interference interval through the addition of the middle nipple of the high-pressure hose for pulsation reduction using a spiral tuner, it is possible to improve the pulsation pressure reduction effect of hydraulic systems such as power steering system.

In addition, by adding an intermediate nipple of a pulsation reducing high pressure hose using a spiral tuner, the interior noise of the vehicle by the power steering system can be significantly reduced by optimizing the length of the wavelength interference section.

With a high-pressure hose having a single spiral structure, which was not possible with the conventional design method, the 10th, 20th and 30th component pulsating pressures and the corresponding indoor noise of the vehicle can be effectively reduced.

In addition, the dual-spiral structure enables effective reduction of 10, 20, 30, 40, 50, 60 and higher order pulsating components and vehicle noise.

Although the present invention has been described in connection with the above-mentioned preferred embodiments, various other modifications and variations may be made without departing from the spirit and scope of the invention. Accordingly, it is intended that the appended claims cover such modifications and variations as fall within the true scope of the invention.

Claims (9)

A hose inlet pipe 130 provided at one end of the high pressure hose 110 and connected to a spiral tuner 120 hose; An intermediate nipple 150 mounted at a distance of 10 mm to 200 mm from an inner end of the spiral tuner 120 hose; And High pressure hose for pulsation reduction using a spiral tuner hose, characterized in that it comprises ;; a hose outlet connecting tube 140 provided at the other end of the high pressure hose 110 is spaced apart from the intermediate nipple 150 by a predetermined distance. A hose inlet connecting pipe 130 provided at one end of the high pressure hose 110; An intermediate nipple 150 mounted at a predetermined distance from the hose inlet connection 130 and connected to a spiral tuner 120 hose; And Spiral tuner hose, characterized in that it comprises a; spiral outlet tuner (120) 10mm ~ 200mm from the inner end of the hose is spaced apart from the other end of the hose outlet connector 140 is provided on the other end of the high pressure hose (110) High pressure hose for pulsation reduction. A hose inlet pipe 130 provided at one end of the high pressure hose 110 and connected to a spiral tuner 120 hose; A hose outlet connecting pipe 140 mounted at a distance of 10 mm to 200 mm from the inner end of the spiral tuner 120 hose; A metal pipe 160 of a predetermined length connected to the outside of the hose outlet connecting pipe 140; And High-pressure hose for pulsation reduction using a spiral tuner hose, characterized in that it comprises ;; metal pipe outlet connecting pipe (170) connected to the end of the metal pipe (160). A hose inlet pipe 130 provided at one end of the high pressure hose 110 and connected to a spiral tuner 120 hose; A metal pipe 160 of a predetermined length connected to the outside of the hose inlet connecting pipe 130; A metal inlet connecting pipe 165 connected to an end of the metal pipe 160; And High-pressure hose for pulsation reduction using a spiral tuner hose, characterized in that it comprises ;; spiral outlet tuner 120, hose outlet connecting pipe 140 is installed spaced apart from the inner end of the hose 10mm ~ 200mm distance. A hose inlet pipe 130 provided at one end of the high pressure hose 110 and connected to a first spiral tuner 120 hose; A first intermediate nipple (150a) mounted at a distance of 10 mm to 200 mm from an inner end of the first spiral tuner (120a) hose; A second intermediate nipple (150b) mounted at a predetermined distance from the first intermediate nipple (150a) and having a second spiral tuner (120b) hose connected to one side thereof; And Spiral tuner hose, characterized in that it comprises a; hose outlet connecting pipe (140) provided at the other end of the high-pressure hose 110 is 10mm ~ 200mm distance from the end of the second spiral tuner (120b) hose High pressure hose for pulsation reduction. A hose inlet connecting pipe 130 provided at one end of the high pressure hose 110; A first intermediate nipple (150a) connected to the hose of the first spiral tuner (120a) spaced apart from the hose inlet connector (130) by a predetermined distance; A second intermediate nipple (150b) having a distance of 10 mm to 200 mm from an end of the first spiral tuner (120a) hose and having a second spiral tuner (120b) connected to a hose at one side thereof; And Spiral tuner hose, characterized in that it comprises ;; the second spiral tuner (120b) 10mm ~ 200mm distance from the end of the hose is provided with a hose outlet connecting pipe 140 provided on the other end of the high pressure hose (110) High pressure hose for pulsation reduction. A hose inlet pipe 130 provided at one end of the high pressure hose 110 and connected to a first spiral tuner 120 hose; A first intermediate nipple (150a) provided with a distance of 10 mm to 200 mm from an inner end of the first spiral tuner (120a) hose and having a second spiral tuner (120b) connected to a hose at one side thereof; A second intermediate nipple (150b) provided at a distance of 10 mm to 200 mm from an end of the second spiral tuner (120b) hose; And High pressure for pulsation reduction using a spiral tuner hose comprising a; hose outlet connecting pipe 140 is provided at the other end of the high pressure hose 110 is spaced a predetermined distance from the second intermediate nipple (150b) hose. A first high pressure hose (110a) for embedding the first spiral tuner (120a) hose on one side; A hose inlet connecting pipe 130 provided at one end of the first high pressure hose 110a in which the first spiral tuner 120a is installed; A hose outlet connector 140 mounted at a distance of 10 mm to 200 mm from an inner end of the first spiral tuner 120a hose; A metal pipe 160 having a predetermined length further connected to one side of the hose outlet connecting pipe 140; And The hose inlet connecting pipe 130 connected to the other end of the metal pipe 160 is provided on the outer side of one end of the second high pressure hose 110b in which the hose of the second spiral tuner 120b is embedded. Spiral tuner hose, characterized in that it comprises a; hose outlet connecting pipe 140 which is mounted at a distance of 10mm ~ 200mm from the end of the second spiral tuner (120b) hose built in the second high pressure hose (110b) High pressure hose for pulsation reduction. A hose inlet pipe 130 provided at one end of the high pressure hose 110 and connected to a first spiral tuner 120 hose; An intermediate nipple 150 provided with a distance of 10 mm to 200 mm from the inner end of the first spiral tuner 120a and the second spiral tuner 120b connected to one side of the hose; A hose outlet connector 140 having a distance of 10 mm to 200 mm from an end of the second spiral tuner 120b hose; A metal pipe 160 of a predetermined length connected to the outside of the hose outlet connecting pipe 140; And High-pressure hose for pulsation reduction using a spiral tuner hose, characterized in that it comprises ;; metal pipe outlet connecting pipe (170) connected to the end of the metal pipe (160).