CN212273404U

CN212273404U - Multistage pressure pulsation damper

Info

Publication number: CN212273404U
Application number: CN202021038470.4U
Authority: CN
Inventors: 唐瑞忠; 朱日明; 高魏磊
Original assignee: Zhejiang Saikesi Hydraulic Co ltd
Current assignee: Zhejiang Saikesi Hydraulic Co ltd
Priority date: 2020-06-08
Filing date: 2020-06-08
Publication date: 2021-01-01
Anticipated expiration: 2030-06-08

Abstract

The utility model belongs to the technical field of hydraulic system, especially, relate to a multistage pressure pulsation damper. The utility model discloses the control range to attenuator among the prior art is narrower, can't be suitable for the problem of broad operating pressure scope operating mode, provides a multistage pressure pulsation damper, which comprises an outer shell body, the damping cavity has in the shell body, the one end of damping cavity is equipped with the inlet that is linked together with the hydraulic pressure pipe, sliding connection has damping component in the damping cavity, one side of damping component is equipped with the changeable hierarchical adjusting part of whole rigidity, the adjustable hierarchical adjusting part's of slip damping component whole rigidity. The utility model discloses be equipped with the changeable hierarchical adjusting part of bulk stiffness in one side of damping subassembly, the whole rigidity through changing hierarchical adjusting part is in order to enlarge the control range of attenuator for the operating mode of the applicable broad operating pressure scope of attenuator.

Description

Multistage pressure pulsation damper

Technical Field

The utility model belongs to the technical field of hydraulic system, especially, relate to a multistage pressure pulsation damper.

Background

The pressure in the hydraulic system pulsates under the influence of structural or load changes, and the pressure pulsation affects the stable operation of the system and can excite noise when serious. To solve this problem, dampers are usually used to eliminate the pulsation variation in the hydraulic system, and the dampers used in the prior art, such as air bag type damper, diaphragm type damper, and solid choke type damper, can reduce the pressure pulsation, stabilize the fluid pressure and flow rate, eliminate the pipeline vibration, protect the downstream instruments and equipment, and increase the volumetric efficiency of the pump. However, the adjustment range of such dampers is narrow, and the dampers cannot be applied to working conditions with a wide working pressure range.

For example, the chinese utility model discloses an adjustable fluid pulsation damper [ application number: 201720106649.0], the utility model comprises a body, a damping section of thick bamboo that floats, spring, screw, end flange, adjusting screw, lock nut, spring holder, guide ring and sealing washer, the damping section of thick bamboo that floats is located this internal chamber, on the face of cylinder that damping section of thick bamboo position and body combine that floats, is provided with guide ring and sealing washer, the spring is placed in damping section of thick bamboo recess that floats, spring holder installation is in the upper portion of spring, the end flange passes through the screw and is in the same place with this body coupling, forms the closed cavity, the screw of adjusting screw in end flange and through spring holder adjusting spring's pretightning force is provided with lock nut on end flange upper portion for making things convenient for adjusting screw's fixed and locking.

The utility model discloses a have the advantage that has adjustable spring pretightning force at flat fluid pulsation in-process, but the pulsation frequency range that it can bear is limited, and it is narrower to have foretell control range, can't be suitable for the problem of comparatively complicated operating mode condition.

SUMMERY OF THE UTILITY MODEL

The utility model aims at the above-mentioned problem, provide a multistage pressure pulsation damper of whole damping rigidity adjustable.

In order to achieve the above purpose, the utility model adopts the following technical proposal:

the utility model provides a multistage pressure pulsation damper, includes the shell body, the damping cavity has in the shell body, the one end of damping cavity is equipped with the inlet that is linked together with the hydraulic pressure pipe, sliding connection has damping subassembly in the damping cavity, one side of damping subassembly is equipped with the changeable hierarchical adjusting part of bulk rigidity, the bulk rigidity of the adjustable hierarchical adjusting part of slide damping subassembly.

In the multistage pressure pulsation damper, the stepped adjusting assembly comprises at least two damping cavities which are isolated from each other and filled with damping media, the damping cavities are sequentially arranged along the sliding direction of the damping assembly, and the damping cavities can be sequentially communicated with the damping cavities by the aid of the sliding damping assembly.

In foretell multistage pressure pulsation damper, the damping chamber is equipped with threely, and the damping chamber includes intercommunication pipeline and the storage chamber of intercommunication each other, the storage chamber passes through intercommunication pipeline and damping cavity intercommunication.

In the above multistage pressure pulsation damper, the rigidity of the damping chamber gradually increases from one end close to the liquid inlet to the other end.

In the multistage pressure pulsation damper, the rigidity between two adjacent damping cavities needs to be set according to the design working condition, and the rigidity difference of each damping cavity is more than ten times and less than one hundred times.

In the above multistage pressure pulsation damper, the damping assembly includes a piston slidably connected to the damping cavity, the damping spring is located between the piston and the outer housing, one end of the damping spring is pressed against the inner wall of the outer housing, the other end of the damping spring is pressed against the piston, and the sliding piston can open or close the damping cavity.

In the multistage pressure pulsation damper, one end of the piston, which is close to the damping spring, is fixedly connected with the guide rod, the cross-sectional area of the guide rod is smaller than that of the piston, and one end of the damping spring is sleeved outside the guide rod.

In foretell multistage pressure pulsation damper, still including the hydraulic pressure union coupling on the shell body, the inlet is located hydraulic pressure union coupling, still be equipped with the sealing washer between hydraulic pressure union coupling and the shell body, hydraulic pressure union coupling passes through sealing washer and shell body sealing connection.

Compared with the prior art, the utility model has the advantages of:

1. the utility model discloses be equipped with the changeable hierarchical adjusting part of bulk stiffness in one side of damping subassembly, the whole rigidity through changing hierarchical adjusting part is in order to enlarge the control range of attenuator for the applicable comparatively complicated operating mode condition of attenuator.

2. The utility model discloses a hierarchical adjusting part comprises the damping chamber that a plurality of rigidity is different, and sliding piston can open or closed damping chamber. The rigidity of the damping spring is accurately designed, the piston can automatically retreat to a specific position under different working pressures, the damping cavity with corresponding rigidity is communicated, and the damper can work in a wider pressure range and is convenient to use.

Drawings

Fig. 1 is a cross-sectional view of the present invention;

fig. 2 is a perspective view of the present invention.

In the figure: the damping device comprises an outer shell 1, a damping cavity 2, a liquid inlet 3, a damping component 4, a grading adjustment component 5, a hydraulic pipe connector 6, a sealing ring 7, a piston 41, a damping spring 42, a guide rod 43, a damping cavity 51, a communication pipeline 52 and a storage cavity 53.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1 and 2, the multistage pressure pulsation damper comprises an outer shell 1, a damping cavity 2 is arranged in the outer shell 1, a liquid inlet 3 communicated with a hydraulic pipe is arranged at one end of the damping cavity 2, a damping component 4 is connected in the damping cavity 2 in a sliding mode, a graded adjusting component 5 with variable integral rigidity is arranged on one side of the damping component 4, and the integral rigidity of the graded adjusting component 5 can be adjusted by the sliding damping component 4. The damping rigidity is the capacity of the damper for damping pulse fluctuation, the larger the rigidity is, the larger the maximum damping capacity is, but the damping sensitivity to tiny fluctuation is reduced therewith.

The utility model discloses, during the use, be linked together inlet 3 and hydraulic pressure pipe, under a certain pressure, piston 41 compresses damping spring 42 under the pressure effect, and at the damping chamber 53 of the corresponding rigidity of a certain position switch-on, the changeable hierarchical regulation subassembly 5's of all switch-on rigidity gross stiffness plays a role to the pulse fluctuation under the current pressure this moment, and the pulse under this pressure of damping is undulant. The event the utility model discloses be equipped with changeable hierarchical adjusting part of global rigidity 5 in one side of damping subassembly 4, the whole rigidity through changing hierarchical adjusting part 5 is in order to enlarge the control range of attenuator for the applicable comparatively complicated operating mode condition of attenuator.

Specific speaking, hierarchical adjusting part 5 includes that at least two mutual isolations and inside packing have damping chamber 51 of damping medium, the utility model discloses do not do the restriction to the concrete selection of damping medium, can be hollow structure or solid construction's polymer elastomer, as long as can play the damping effect can, damping chamber 51 arranges in proper order along damping part 4's slip direction, and rigidity strengthens gradually, and slip damping part 4 can make damping chamber 51 be linked together with damping cavity 2 in proper order.

As shown in fig. 1, the number of the damper chambers 51 is three, the damper chambers 51 include a communication pipe 52 and a storage chamber 53 which are communicated with each other, and the storage chamber 53 is communicated with the damper cavity 2 through the communication pipe 52. The rigidity of the damping cavity 51 is gradually increased from one end close to the liquid inlet 3 to the other end, and the integral rigidity of the grading adjusting assembly 5 is the maximum rigidity of the damping cavity 51 communicated with the damping cavity 2.

In use, when the working pressure is low, the damping assembly 4 is only pushed to open the damping cavity 51 with low rigidity close to the liquid inlet 3. When the working pressure is larger, the piston 4 is continuously pushed, and at a certain position, the second damping cavity is communicated, and the total rigidity of all the communicated damping cavities adapts to the current working pressure, so that the damping effect on the pressure fluctuation in the current pressure direction is realized. As the working pressure rises further, the third damping chamber is connected and so on.

Preferably, the stiffness between two adjacent damping chambers 51 needs to be set according to a set working pressure range, and the stiffness is different by more than ten times and less than one hundred times. Therefore, the adjustment range of the damper can be ensured, and the sensitivity of the damper can be ensured.

As shown in fig. 2, the damping assembly 4 includes a piston 41 slidably connected to the damping cavity 2, a damping spring 42 is disposed between the piston 41 and the outer housing 1, one end of the damping spring 42 is pressed against the inner wall of the outer housing 1, the other end is pressed against the piston 41, and the sliding piston 41 can open or close the damping cavity 51. The damping spring 42 is compressed and retracted with the increase of the working pressure, the stiffness of the damping spring 42 is precisely designed according to the working pressure, at a certain pressure, the corresponding damping chamber 51 is open, and all open damping chambers 51 damp the pressure pulsation at that pressure.

One end of the piston 41 close to the damping spring 42 is fixedly connected with a guide rod 43, the cross-sectional area of the guide rod 43 is smaller than that of the piston 41, and one end of the damping spring 42 is sleeved outside the guide rod 43. The guide rod 43 can guide the compression direction of the damping spring 42, thereby preventing the damping spring 42 from bending.

As shown in fig. 1, still including connecting the hydraulic pressure union coupling 6 on shell body 1, inlet 3 is located hydraulic pressure union coupling 6, still be equipped with sealing washer 7 between hydraulic pressure union coupling 6 and the shell body 1, hydraulic pressure union coupling 6 passes through sealing washer 7 and shell body 1 sealing connection.

The utility model discloses a theory of operation is: when the damping device is used, liquid enters the damping cavity 2 from the liquid inlet 3 in the hydraulic pipe connector 6, the piston 41 is pressed by the liquid due to pressure, and the piston 41 slides to press the damping spring 42. The piston 41 gradually moves inward during the pressing process, thereby sequentially opening the damping chamber 51. As the number of opened damping chambers 51 increases, the overall stiffness of the stepped adjustment assembly 5 gradually increases, gradually adapting to the damping of the current operating pressure range. The piston 41 moves outward as the pressure decreases, gradually closing each damping chamber 51. The event the utility model discloses be equipped with the changeable hierarchical adjusting part of bulk stiffness in one side of damping subassembly, the working pressure scope in order to enlarge the attenuator adaptation through the bulk stiffness who changes hierarchical adjusting part for the applicable comparatively complicated operating mode condition of attenuator.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Although the terms outer housing 1, damping cavity 2, inlet 3, damping assembly 4, step adjustment assembly 5, hydraulic pipe connection 6, sealing ring 7, piston 41, damping spring 42, guide rod 43, damping chamber 51, communication duct 52, storage chamber 53, etc. are used more herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.

Claims

1. The utility model provides a multistage pressure pulsation attenuator, includes shell body (1), damping cavity (2) have in shell body (1), the one end of damping cavity (2) is equipped with inlet (3) that are linked together with hydraulic pressure pipe, its characterized in that: the damping cavity (2) is internally and slidably connected with a damping component (4), one side of the damping component (4) is provided with a graded adjusting component (5) with variable integral rigidity, and the integral rigidity of the graded adjusting component (5) can be adjusted by the sliding damping component (4).

2. The multi-stage pressure pulsation damper according to claim 1, wherein: the grading adjusting assembly (5) comprises at least two damping cavities (51) which are isolated from each other and filled with damping media, the damping cavities (51) are sequentially arranged along the sliding direction of the damping assembly (4), and the sliding damping assembly (4) can enable the damping cavities (51) to be sequentially communicated with the damping cavity (2).

3. The multi-stage pressure pulsation damper according to claim 2, wherein: the damping cavity (51) is provided with three, the damping cavity (51) comprises a communicating pipeline (52) and a storage cavity (53) which are communicated with each other, and the storage cavity (53) is communicated with the damping cavity (2) through the communicating pipeline (52).

4. The multi-stage pressure pulsation damper according to claim 2, wherein: the rigidity of the damping cavity (51) is gradually increased from one end close to the liquid inlet (3) to the other end, and the integral rigidity of the grading adjusting assembly (5) is the maximum rigidity of the damping cavity (51) communicated with the damping cavity (2).

5. The multi-stage pressure pulsation damper according to claim 4, wherein: the rigidity difference between two adjacent damping cavities (51) is more than ten times and less than one hundred times.

6. The multi-stage pressure pulsation damper according to claim 2, wherein: damping subassembly (4) including with damping cavity (2) sliding connection's piston (41), damping spring (42) are located between piston (41) and shell body (1), and damping spring (42) one end is pressed and is established on the inner wall of shell body (1), and the other end is pressed and is established on piston (41), and sliding piston (41) can be opened or closed damping chamber (51).

7. The multi-stage pressure pulsation damper according to claim 6, wherein: piston (41) are close to damping spring (42) one end fixedly connected with guide bar (43), the cross-sectional area of guide bar (43) is less than the cross-sectional area of piston (41), a pot head of damping spring (42) is established outside guide bar (43).

8. The multi-stage pressure pulsation damper according to claim 1, wherein: still including connecting hydraulic pressure union coupling head (6) on shell body (1), inlet (3) are located hydraulic pressure union coupling head (6), still be equipped with sealing washer (7) between hydraulic pressure union coupling head (6) and shell body (1), hydraulic pressure union coupling head (6) are through sealing washer (7) and shell body (1) sealing connection.