CN210004014U - honeycomb rubber lining type pressure pulsation attenuator - Google Patents

Abstract

The utility model discloses an honeycomb rubber lining formula pressure pulsation attenuator, including left end cover, adjusting spring, axial honeycomb pipe, radial honeycomb pipe, casing and right-hand member lid etc, left end cover and right-hand member lid center are opened respectively has import and export, axial honeycomb pipe is close to the import, it has axial honeycomb blind hole to open, the direction in hole is the same with the liquid flow direction, adopt adjusting spring to carry out axial positioning between with the left end cover, adjusting spring rigidity is less than rubber rigidity, radial honeycomb pipe is close to the export, it has radial honeycomb hole to open, the direction in hole is perpendicular with the liquid flow direction, adopt boss and left end cover to carry out axial positioning, axial honeycomb pipe and radial honeycomb pipe line are lined in the casing, its central hole diameter all is greater than the centre bore diameter of casing, left end cover and right-hand member lid.

Description

A honeycomb rubber lined pressure pulsation attenuator

technical field

The utility model relates to a pressure pulsation attenuator, in particular to a honeycomb rubber lining type pressure pulsation attenuator.

Background technique

The hydraulic pump is the core component of the hydraulic system and is widely used in the fields of marine ships, aerospace and machinery manufacturing. When hydraulic pumps (especially plunger pumps and gear pumps) work, due to their inherent characteristics, the output working medium will have flow pulsations of tens to hundreds of hertz, and these flow pulsations flow through pipelines, valve ports, actuators, etc. When loaded, pressure pulsations of the same frequency and harmonic frequency will be excited. In addition, when the fluid flows in high-speed flow areas such as valve ports, cavitation is very likely to occur, which in turn stimulates high-frequency pulsating pressures of over 1,000 Hz.

It can be seen that the pressure pulsation will have a very wide frequency change during the working process of the hydraulic system, showing the characteristics of a wide frequency spectrum. On the one hand, these pressure pulsations will directly cause the stress pulsation and mechanical pulsation of the pipeline, which will affect the working quality and service life of the pipeline system; on the other hand, fluid noise will be generated, which will be directly transmitted to the entire hydraulic system along the pipeline, forming noise. Pollution. Therefore, it is necessary to develop a pressure pulsation attenuator with a wide frequency spectrum to effectively attenuate the pressure pulsation in the hydraulic system, thereby effectively suppressing the pipeline vibration and fluid noise, and providing technical support for the vibration reduction and noise reduction of the hydraulic system.

Utility model content

Aiming at the characteristics of the wide frequency spectrum of pressure pulsation in the hydraulic system, the utility model provides a honeycomb rubber lined pressure pulsation attenuator to realize wide frequency attenuation of the pressure pulsation attenuator, thereby suppressing the vibration and noise of the pipeline system.

A honeycomb rubber lined pressure pulsation attenuator, comprising a left end cap, an O-ring, an adjusting spring, an axial honeycomb tube, a radial honeycomb tube, a casing, a spring washer, a hexagon socket head cap screw and a right end cap, etc.; the left end cap and the The center of the right end cover has an inlet and an outlet respectively, and is connected to the shell with hexagon socket screws, and an O-ring is installed on the left end cover and the right end cover for radial sealing; the shell is lined with an axial honeycomb tube. And the radial honeycomb tube, the center of the axial honeycomb tube is a through hole, close to the inlet, and the adjustment spring is used between the left end cover to axially locate and adjust the deformation of the axial honeycomb tube, the center of the radial honeycomb tube is a through hole, close to the outlet, using The boss and the left end cap are positioned axially.

Further, the axial honeycomb tube is provided with axial honeycomb holes, and the direction of the holes is the same as the direction of the liquid flow to adjust the natural frequency of the rubber and attenuate the low-frequency pressure pulsation. The honeycomb holes are blind holes, and there are no holes near the inlet. Honeycomb holes.

Further, the radial honeycomb tube is provided with radial honeycomb holes, and the direction of the holes is perpendicular to the liquid flow direction, so as to attenuate high-frequency pressure pulsation.

Further, the shell is a hollow structure with a boss in the middle and a central hole on the boss. The diameter of the central hole is the same as the diameter of the left end cap and the right end cap, and is smaller than the diameter of the axial honeycomb tube and the radial honeycomb tube.

Further, the stiffness of the adjusting spring is smaller than the rubber stiffness of the axial honeycomb tube.

Further, the inlet of the left end cap, the central through hole of the axial honeycomb tube and the central hole of the boss constitute the first Helmholtz attenuator, and the central hole of the boss, the central through hole of the radial honeycomb tube and the outlet of the right end cap constitute the first Helmholtz attenuator. Second Helmholtz attenuator.

Compared with the prior art, the beneficial effects of the present utility model are:

(1) The pulsating liquid enters from the inlet of the left end cap, passes through the axial honeycomb tube and the longitudinal honeycomb tube in turn, and then flows out from the outlet of the right end cap. The compression and expansion of the axial honeycomb tube itself can attenuate low-frequency pressure pulsations and suppress the generation of harmonic-frequency high-frequency pulsations; two Helmholtz attenuators can be used to attenuate medium-frequency pressure pulsations; the damping effect of radial honeycomb holes can be used to Attenuates high frequency pressure pulsations. Combining three different attenuation methods enables the attenuation of wide-band pressure pulsations.

(2) The liquid does not enter the axial honeycomb hole, but its size can be changed, thereby changing the natural frequency of the axial honeycomb tube, and realizing the purpose of adjusting the attenuation frequency of low-frequency pressure pulsation; the size of the longitudinal honeycomb hole can also be changed, Used to adjust the attenuation frequency of high frequency pressure pulsation. If the working conditions (pressure pulsation frequency and pressure, etc.) change, only the axial honeycomb tube and the radial honeycomb tube need to be replaced to achieve the best attenuation effect.

Description of drawings

Fig. 1 is the structural representation of the present utility model;

Fig. 2 is the schematic diagram of the axial honeycomb tube structure;

Fig. 3 is the schematic diagram of radial honeycomb tube structure;

Figure 4 is a schematic diagram of the position of the liquid flowing through the attenuator channel.

The signs in the above figure are: 1. Left end cover; 2. O-ring; 3. Adjusting spring; 4. Axial honeycomb tube; 5. Radial honeycomb tube; 6. Housing; 7. Spring gasket; 8. Inner Hexagon screw; 9. Right end cap; 10. Axial honeycomb hole; 11. Radial honeycomb hole; 12. Inlet; 13. Axial honeycomb tube center through hole; 14. Boss center hole; 15. Radial honeycomb tube center Through hole; 16. Outlet.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

Figure 1 is an embodiment of the utility model, including a left end cap 1, an O-ring 2, an adjustment spring 3, an axial honeycomb tube 4, a radial honeycomb tube 5, a casing 6, a spring washer 7, and a hexagon socket screw 8 and the right end cover 9; the center of the left end cover 1 and the right end cover 9 are respectively provided with an inlet 12 and an outlet 16, and are connected to the shell 6 by using hexagon socket head screws 8, and an O-ring is installed on the left end cover 1 and the right end cover 9 2, for radial sealing; the interior of the housing 6 is lined with an axial honeycomb tube 4 and a radial honeycomb tube 5, the axial honeycomb tube 4 is close to the inlet 12, and the adjustment spring 3 is used between the left end cover 1 for axial positioning and adjustment. The deformation of the axial honeycomb tube 4 is adjusted, and the radial honeycomb tube 5 is close to the outlet 16 and is positioned axially by means of the boss and the left end cover 1 . The shell 6 is a hollow structure with a boss in the middle, and a central hole 14 on the boss. The diameter of the central hole 14 is the same as the diameter of the left end cap 1 and the right end cap 9, and both are smaller than the axial honeycomb tube 4 and the radial honeycomb tube 5. diameter of.

The axial honeycomb tube 4 is provided with an axial honeycomb hole 10. The direction of the hole is the same as the direction of the liquid flow to adjust the natural frequency of the honeycomb rubber, thereby attenuating low-frequency pressure pulsation. The axial honeycomb hole 10 is blind. There is no honeycomb hole near the inlet; the center of the axial honeycomb tube 4 is a through hole 13 , and FIG. 2 is a schematic structural diagram of the axial honeycomb tube 4 .

FIG. 3 is a schematic structural diagram of the radial honeycomb tube 5 in one embodiment. The radial honeycomb tube 5 is provided with a radial honeycomb hole 11 , the direction of which is perpendicular to the direction of the liquid flow, and is used to attenuate high-frequency pressure pulsation. The center of the radial honeycomb tube 5 is a through hole 15 .

The inlet 12 at the left end cover 1, the central through hole 13 of the axial honeycomb tube and the central hole 14 of the boss form the first Helmholtz attenuator, the central hole 14 of the boss, the central through hole 15 of the radial honeycomb tube and the right end cover 9 Outlet 16 forms the second Helmholtz attenuator. The liquid enters from the inlet 12 , and then flows to the outlet 16 through the central through hole 13 of the axial honeycomb tube, the central hole 14 of the boss, and the central through hole 15 of the radial honeycomb tube in sequence. The pressure pulsation is low frequency: when the pressure is high, both the axial honeycomb tube 4 and the radial honeycomb tube 5 can be greatly deformed, and when the pressure is low, the deformation of the axial honeycomb tube 4 and the radial honeycomb tube 5 is relatively large. If the deformation is small, the pressure pulsation can be absorbed and attenuated; when the pressure pulsation is at an intermediate frequency, the pressure pulsation can be attenuated by two Helmholtz attenuators. When the pressure pulsation is high frequency, the damping effect of the radial honeycomb holes 11 on the radial honeycomb tube 5 can dampen the pressure pulsation. To sum up, no matter what the pressure pulsation frequency is or whether the low-frequency pressure pulsation produces harmonic-frequency high-frequency pressure pulsation, the pressure pulsation can be determined by the corresponding attenuation components (axial honeycomb tube 4, radial honeycomb tube 5 and Helmholtz). attenuator) to attenuate.

The number and shape and size of the axial honeycomb tubes 4 and the radial honeycomb tubes 5 are determined and adjusted according to the length, diameter and pressure pulsation damping performance requirements of the casing 6 . As the shape, size and distribution of the axial honeycomb holes 10 and the radial honeycomb holes 11 are determined and adjusted according to the diameter of the axial honeycomb tube 4 and the radial honeycomb tube 5 and the pressure pulsation attenuation performance requirements, considering the best effect, the shaft The axial honeycomb holes 10 and the axial honeycomb holes 11 are regular hexagons and are distributed symmetrically in the circumferential direction.

The above are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present utility model shall be included in the present utility model. within the scope of the new protection.

Claims (6)

1. A honeycomb rubber-lined pressure pulsation attenuator, characterized in that: comprising a left end cap, an O-ring, an adjustment spring, an axial honeycomb tube, a radial honeycomb tube, a casing, a spring washer, a hexagon socket head cap screw and a right end Cover; the center of the left end cover and the right end cover has an inlet and an outlet respectively, and is connected to the shell with hexagon socket screws, and an O-ring is installed on the left end cover and the right end cover for radial sealing; the shell is hollow The structure has a boss in the middle and a central hole on the boss; the axial honeycomb tube is close to the inlet, and the radial honeycomb tube is close to the outlet. 2. A honeycomb rubber lined pressure pulsation attenuator according to claim 1, characterized in that: the axial honeycomb tube is provided with axial honeycomb holes, the direction of the holes is the same as the liquid flow direction, and the honeycomb holes are blind There are no honeycomb holes near the inlet. 3 . The honeycomb rubber-lined pressure pulsation attenuator according to claim 1 , wherein the radial honeycomb tube is provided with radial honeycomb holes, and the direction of the holes is perpendicular to the liquid flow direction. 4 . 4. A honeycomb rubber lined pressure pulsation attenuator according to claim 1, characterized in that: the diameter of the center hole of the shell boss is the same as the diameter of the left end cap and the right end cap, and is smaller than the axial honeycomb tube and the diameter of the right end cap. Diameter of the radial honeycomb tube. 5. A honeycomb rubber lined pressure pulsation attenuator according to claim 1, characterized in that: an adjusting spring is used between the axial honeycomb tube and the left end cover to perform axial positioning and adjust the deformation of the axial honeycomb tube, and the diameter of the Use bosses and left end caps for axial positioning to the honeycomb tube. 6 . The honeycomb rubber-lined pressure pulsation attenuator according to claim 1 or 5 , wherein the stiffness of the adjusting spring is smaller than the rubber stiffness of the axial honeycomb tube. 7 .

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