CN210069241U - Self-adaptive compound pressure pulsation attenuator - Google Patents
Self-adaptive compound pressure pulsation attenuator Download PDFInfo
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- CN210069241U CN210069241U CN201920796190.0U CN201920796190U CN210069241U CN 210069241 U CN210069241 U CN 210069241U CN 201920796190 U CN201920796190 U CN 201920796190U CN 210069241 U CN210069241 U CN 210069241U
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- pressure pulsation
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- spring
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- 230000010349 pulsation Effects 0.000 title claims abstract description 48
- 150000001875 compounds Chemical class 0.000 title claims description 5
- 238000004146 energy storage Methods 0.000 claims abstract description 12
- 210000004907 gland Anatomy 0.000 claims abstract description 6
- 239000007788 liquid Substances 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 6
- 230000003044 adaptive effect Effects 0.000 claims 5
- 230000009977 dual effect Effects 0.000 claims 4
- 238000013016 damping Methods 0.000 abstract description 5
- 230000033228 biological regulation Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 6
- 239000012530 fluid Substances 0.000 description 4
- 230000009123 feedback regulation Effects 0.000 description 2
- 230000003584 silencer Effects 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 210000002310 elbow joint Anatomy 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model discloses a self-adaptation double entry pressure pulsation attenuator, its characterized in that: comprises a proportional electromagnet, a push rod, a gland, a shell, a cover plate, a diaphragm, a control core shaft, a spring and the like. The front end and the rear end of the shell are provided with an inlet and an outlet, the upper end and the lower end of the shell are provided with two energy accumulator cavities, and the diaphragm is arranged in the cavities through a cover plate; the cover plate divides the cavity into an upper cavity and a lower cavity, wherein the upper cavity is an inflation cavity, and the lower cavity is an energy storage cavity; the middle part of the shell is of a hollow ladder structure and is used for installing two control mandrels; one side of the control mandrel is provided with a spring, and the other side of the control mandrel is connected with a push rod of the proportional electromagnet. The utility model discloses an attenuator accumulator group forms double entry pressure pulsation attenuator with the combination of helmholtz attenuator to attenuate the pressure pulsation of broad frequency range, and drive control dabber through the proportion electro-magnet and carry out self-adaptation regulation to energy storage ware damping hole aperture, in order to seek best pressure pulsation decay operating point, realize the maximize degree decay to pressure pulsation.
Description
Technical Field
The utility model relates to a pressure pulsation attenuator, concretely relates to self-adaptation double entry pressure pulsation attenuator.
Background
The hydraulic pump (such as gear pump, vane pump, plunger pump, etc.) is the "heart" of the hydraulic system, can convert mechanical energy into pressure energy, and then is used for driving the executive component to do work. However, due to the inherent property of volume change of the hydraulic pump, the output liquid of the hydraulic pump has a tendency of fluctuation, namely, flow pulsation is generated, and when the flow pulsation meets loads such as joints, elbows and valve ports, pressure pulsation is generated. On one hand, the pressure pulsation can directly cause the stress pulsation and the mechanical pulsation of the pipeline, and influences the working quality and the service life of the pipeline system; on the other hand, fluid noise is generated and is directly transmitted to the outside of the whole water hydraulic system along a pipeline, so that noise pollution is formed.
For various hydraulic pumps, because the reference frequency of flow pulsation cannot be determined due to the rotating speed range, structural characteristics and the like of the pump, and harmonic flow pulsation is generated by the flow pulsation of the reference frequency, it can be seen that for a general hydraulic system, the flow pulsation and the pressure pulsation both have broadband characteristics, specific numerical values of fundamental frequencies cannot be determined, and the design of the pressure pulsation attenuator needs to be optimized for the characteristic frequencies, so that the design of the pressure pulsation attenuator with the optimal frequency is very difficult.
In addition, the energy accumulator and the Helmholtz silencer are effective means for restraining and reducing the pressure pulsation of the pipeline; the natural frequency of the traditional energy accumulator is low (below 100 Hz), the effect of reducing low-frequency pressure pulsation is good, and the optimal attenuation frequency is a fixed value; helmholtz mufflers are commonly used as gas mufflers, which have a high natural frequency (above 300 Hz) when used as line mufflers, but have a relatively high volumetric mass when effectively attenuating pressure pulsations in the line.
SUMMERY OF THE UTILITY MODEL
To the pressure pulsation in the hydraulic pressure pipeline, the utility model provides a self-adaptation double entry pressure pulsation attenuator, this attenuator comprises energy storage ware and helmholtz silencer, can attenuate the pressure pulsation in the broad frequency range, and this attenuator can carry out self-adaptation regulation to energy storage ware damping hole aperture through proportion electro-magnet drive control dabber according to the hydraulic system demand to seek best pressure pulsation attenuation operating point.
A self-adaptive compound pressure pulsation attenuator comprises a proportional electromagnet, an inner hexagon screw, a push rod, a locking screw, a spring washer, a gland, a shell, a cover plate, an inflation screw, a combined sealing ring, a diaphragm, an O-shaped ring, a control mandrel and a spring. The front end and the rear end of the shell are provided with inlets and outlets and are connected in a pipeline system through threads; the upper end and the lower end of the shell are provided with two energy accumulator cavities, and the diaphragm is arranged in the cavities through a cover plate; the cover plate divides the cavity into an upper cavity and a lower cavity, the upper cavity is an inflation cavity, gas is sealed through an inflation screw and a combined sealing ring, the lower cavity is an energy storage cavity, and liquid in the pipeline can flow into the energy accumulator through the energy accumulator hole; the middle part of the shell is of a hollow ladder structure and is used for mounting two control mandrels, and one side of each ladder is provided with a rectangular groove for radial positioning; one side of the control mandrel is provided with a spring, and the other side of the control mandrel is connected with a push rod of the proportional electromagnet.
Furthermore, the whole control mandrel is of a semicircular structure, the bottom of the control mandrel is a plane with a semicircle, and the left structure and the right structure are asymmetrical; one side is triangular, the top of the triangle is a rectangular boss, the middle part is a semicircular groove, and the other side is of a semicircular structure and is provided with a drainage hole and a pressure equalizing groove; the two control mandrels are in semi-circular plane contact and are reversely arranged in the shell hole.
Furthermore, the pressure cover is provided with a boss and a round hole which are respectively used for positioning the spring and guiding the push rod.
Compared with the prior art, the beneficial effects of the utility model are that:
(1) the utility model discloses combine a plurality of energy storages and helmholtz attenuator, form compound pressure pulsation attenuator, wherein the energy storage is used for attenuating low frequency pressure pulsation, and helmholtz attenuator is used for attenuating high frequency pressure pulsation to can attenuate the pressure pulsation of broad frequency range.
(2) The utility model provides a proportion electro-magnet input signal of telecommunication can distribute according to pressure pulsation's frequency and operating pressure and carry out the feedback regulation to the realization is attenuated to pressure pulsation's maximize degree.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a schematic diagram of a mechanism for controlling the mandrel;
FIG. 3 is a liquid distribution diagram during operation of the attenuator;
FIG. 4 is a schematic diagram of the operation of the attenuator;
the above figures are labeled as: 1. a proportional electromagnet; 2. a socket head cap screw; 3. a push rod; 4. locking the screw; 5. a spring washer; 6. a gland; 7. a housing; 8. a cover plate; 9. an inflation screw; 10. a combined sealing ring; 11. a diaphragm; 12 and 13, O-rings; 14. controlling the mandrel; 15. a spring; 16. a drainage hole; 17. an accumulator bore; 18. an inlet and an outlet; 19. a rectangular boss; 20. a pressure equalizing groove; 21. a semicircular groove; 22. opening of the upper accumulator damping hole; 23. the opening of the lower accumulator damping hole.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and embodiments.
Fig. 1 is an embodiment of the present invention, which includes a proportional electromagnet 1, an inner hexagon screw 2, a push rod 3, a locking screw 4, a spring washer 5, a gland 6, a housing 7, a cover plate 8, an inflation screw 9, a combined seal ring 10, a diaphragm 11, O- rings 12 and 13, a control core shaft 14, and a spring 15. The front end and the rear end of the shell 7 are provided with inlet and outlet 18 which are connected in a pipeline system through threads; the upper end and the lower end of the shell 7 are provided with two energy accumulator cavities, and the diaphragm 11 is arranged in the cavities through the cover plate 8; the cover plate 8 divides the cavity into an upper cavity and a lower cavity, the upper cavity is an inflation cavity, gas is sealed through an inflation screw 9 and a combined sealing ring 10, the lower cavity is an energy storage cavity, and liquid in the pipeline can flow into an energy accumulator through an energy accumulator hole 17; the middle part of the shell 7 is of a hollow ladder structure and is used for mounting two control mandrels 14, and one side of each ladder is a rectangular groove to prevent the control mandrels 14 from rotating and perform radial positioning; one side of the control mandrel 14 is provided with a spring 15, and the other side is connected with the push rod 3 of the proportional electromagnet 1.
The whole control mandrel 14 is of a semicircular structure, the bottom of the control mandrel is a plane with a semicircle, and the left structure and the right structure are asymmetrical; fig. 2 is a schematic view of a control mandrel according to an embodiment, one side of the control mandrel 14 is triangular, the top of the triangle is a rectangular boss 19, the middle part of the triangle is a semicircular groove 21 for reducing the contact area between the control mandrel 14 and the housing 7, the other side of the control mandrel is a semicircular structure, and the control mandrel 14 is provided with a drainage hole 16 and a pressure equalizing groove 20, and the pressure equalizing groove 20 can prevent the control mandrel 14 from being misaligned. The two control mandrels 14 are in semi-circular plane contact and are reversely arranged in the shell hole, so that the two proportional electromagnets are prevented from being installed and interfered, and the radial size of the shell 7 is reduced.
The gland 6 is provided with a boss and a round hole which are respectively used for positioning the spring 15 and guiding the push rod 3.
FIG. 3 is a diagram showing a liquid distribution in operation of the attenuator. Liquid in the pipe system can enter and exit the attenuator through the inlet and outlet 18. After flowing in, the liquid firstly passes through the spring 15 and the rectangular step of the shell 7, then flows through the semicircular hole at the bottom of the control mandrel 14, and forms two fluid passages, one fluid passage flows into the energy storage cavities of the two energy accumulators along the drainage hole 16 and the energy accumulator hole 17, and the other fluid passage flows into the spring 15 at the other side and the rectangular step of the shell 7. Wherein, the two energy accumulators can attenuate low-frequency pressure pulsation; the spring 15 and the rectangular step passing through the shell 7 form a large cavity to form a Helmholtz pressure pulsation attenuator which can attenuate medium and high frequency in pressure pulsation, and the schematic diagram of the attenuator is shown in FIG. 4.
When the proportional electromagnet 1 is not electrified, the spring 15 is in a compressed state and has the largest compression amount, the drainage hole 16 on the control mandrel 14 is not intersected with the energy storage hole 17 on the shell, and liquid in a pipeline system cannot enter an energy storage cavity. When the two proportional electromagnets 1 are powered on, the left and right movement displacements of the two control mandrels 14 are not interfered with each other and can be different, so that the opening degrees 22 and 23 of the damping holes of the upper energy accumulator and the lower energy accumulator (corresponding to the variable throttle orifice areas shown in fig. 4) can be different, and the attenuation frequency of low-frequency pressure pulsation can be adjusted. And the input electric signal of the proportional electromagnet 1 can be subjected to feedback regulation according to the frequency distribution of pressure pulsation and working pressure, so that the maximum degree attenuation of the pressure pulsation is realized.
The above description is only for the preferred embodiment of the present invention and should not be taken as limiting the invention, and any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (5)
1. An adaptive compound pressure pulsation attenuator, characterized by: the device comprises a proportional electromagnet, an inner hexagon screw, a push rod, a locking screw, a spring washer, a gland, a shell, a cover plate, an inflation screw, a combined sealing ring, a diaphragm, an O-shaped ring, a control mandrel and a spring, wherein the front end and the rear end of the shell are provided with an inlet and an outlet which are connected in a pipeline system through threads; the upper end and the lower end of the shell are provided with two energy accumulator cavities, and the diaphragm is arranged in the cavities through a cover plate; the cover plate divides the cavity into an upper cavity and a lower cavity, the upper cavity is an inflation cavity, gas is sealed through an inflation screw and a combined sealing ring, the lower cavity is an energy storage cavity, and liquid in the pipeline can flow into the energy accumulator through the energy accumulator hole; the middle part of the shell is of a hollow ladder structure and is used for mounting two control mandrels, and one side of each ladder is provided with a rectangular groove to prevent the control mandrels from rotating and perform radial positioning; one side of the control mandrel is provided with a spring, and the other side of the control mandrel is connected with a push rod of the proportional electromagnet.
2. The adaptive dual pressure pulsation attenuator of claim 1, wherein: the whole control mandrel is of a semicircular structure, the bottom of the control mandrel is a plane with a semicircle, and the left and right of the control mandrel are of an asymmetric structure; one side of the control mandrel is triangular, the top of the triangular is a rectangular boss, the middle part of the control mandrel is a semicircular groove, and the other side of the control mandrel is of a semicircular structure and is provided with a drainage hole and a pressure equalizing groove.
3. An adaptive dual pressure pulsation attenuator according to claim 1 or 2, wherein: the two control core shafts are in semi-circular plane contact and are reversely distributed in the shell hole, and the push rod and the spring are driven to move in a return stroke mode through the proportional electromagnet.
4. The adaptive dual pressure pulsation attenuator of claim 1, wherein: the pressure cover is provided with a boss and a round hole which are respectively used for positioning the spring and guiding the push rod.
5. The adaptive dual pressure pulsation attenuator of claim 1, wherein: the spring and the rectangular step of the shell form a large cavity to form a Helmholtz pressure pulsation attenuator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920796190.0U CN210069241U (en) | 2019-05-29 | 2019-05-29 | Self-adaptive compound pressure pulsation attenuator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920796190.0U CN210069241U (en) | 2019-05-29 | 2019-05-29 | Self-adaptive compound pressure pulsation attenuator |
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| Publication Number | Publication Date |
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| CN210069241U true CN210069241U (en) | 2020-02-14 |
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| CN201920796190.0U Active CN210069241U (en) | 2019-05-29 | 2019-05-29 | Self-adaptive compound pressure pulsation attenuator |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110107765A (en) * | 2019-05-29 | 2019-08-09 | 青岛科技大学 | A kind of adaptive compound pressure fluctuation attenuator |
| CN111706739A (en) * | 2020-06-24 | 2020-09-25 | 华中科技大学 | Frequency-division combined pressure pulsation attenuation device and method |
| CN110107765B (en) * | 2019-05-29 | 2024-04-26 | 青岛科技大学 | Self-adaptive compound pressure pulsation attenuator |
-
2019
- 2019-05-29 CN CN201920796190.0U patent/CN210069241U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110107765A (en) * | 2019-05-29 | 2019-08-09 | 青岛科技大学 | A kind of adaptive compound pressure fluctuation attenuator |
| CN110107765B (en) * | 2019-05-29 | 2024-04-26 | 青岛科技大学 | Self-adaptive compound pressure pulsation attenuator |
| CN111706739A (en) * | 2020-06-24 | 2020-09-25 | 华中科技大学 | Frequency-division combined pressure pulsation attenuation device and method |
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