阅读说明：本技术 一种液压振动台剩余能安全释放装置 (Hydraulic pressure shaking table residual energy safety release ) 是由 王易君 鲁亮 张平 王珏 毛勇建 胡宇鹏 李明海 陈颖 宋琼 于 2020-06-04 设计创作，主要内容包括：本发明公开了一种液压振动台剩余能安全释放装置,用于吸收脉动能量的蓄能单元、用于减小管路振动的消振单元、用于消耗流体动能,降低流体压力的耗能单元；蓄能单元的输入端与液压振动台回油输出端连接,蓄能单元的输出端与消振单元的输入端连接；在蓄能单元上连接有蓄能器；消振单元的输出端与耗能单元的输入端连接；耗能单元的输出端与油源分配器端口连接,耗能单元上连接有蓄能器；本申请实现了大流量、高流速液压振动台的剩余能安全释放,减小了回油管路的液压冲击和压力脉动,满足液压振动台管道减振、保护液压装置的需要。(The invention discloses a hydraulic vibration table residual energy safety release device which comprises an energy storage unit, a vibration absorption unit and an energy consumption unit, wherein the energy storage unit is used for absorbing pulse energy, the vibration absorption unit is used for reducing pipeline vibration, and the energy consumption unit is used for consuming fluid kinetic energy and reducing fluid pressure; the input end of the energy storage unit is connected with the oil return output end of the hydraulic vibration table, and the output end of the energy storage unit is connected with the input end of the vibration absorption unit; the energy storage unit is connected with an energy accumulator; the output end of the vibration absorption unit is connected with the input end of the energy consumption unit; the output end of the energy consumption unit is connected with the port of the oil source distributor, and the energy accumulator is connected to the energy consumption unit; the application realizes the safe release of the residual energy of the hydraulic vibration table with large flow and high flow rate, reduces the hydraulic impact and pressure pulsation of an oil return pipeline, and meets the requirements of vibration reduction and protection of the pipeline of the hydraulic vibration table.)

1. The utility model provides a hydraulic pressure shaking table residual energy safety release which characterized in that includes:

the energy storage unit (1) is used for absorbing the pulse energy, the input end of the energy storage unit (1) is connected with the oil return output end of the hydraulic vibration table, and the output end of the energy storage unit (1) is connected with the input end of the vibration absorption unit (2); the energy storage unit (1) is connected with an energy storage device (12);

a vibration damping unit (2) for reducing vibration of the pipeline; the output end of the vibration absorption unit (2) is connected with the input end of the energy consumption unit (3);

the energy consumption unit (3) is used for consuming the kinetic energy of the fluid and reducing the pressure of the fluid; the output end of the energy consumption unit (3) is connected with the port (312) of the oil source distributor, and the energy accumulator (12) is connected to the energy consumption unit (3).

2. The residual energy safety release device of the hydraulic vibration table according to claim 1, characterized in that the vibration absorption unit (2) is formed into a tubular structure, the vibration absorption unit (2) comprises a flexible wall (22) formed into the tubular structure, a strength wall (23) and a rubber wall (24), the strength wall (23) and the rubber wall (24) form a combined layer, the combined layer is at least one layer, in the combined layer, the strength wall (23) is on the inner layer, the rubber wall (24) is on the outer layer, the strength wall (23) and the rubber wall (24) are connected, and the combined layer of the at least one layer is covered outside the flexible wall (22).

3. The residual energy safety release device of the hydraulic vibration table according to claim 1, characterized in that a deceleration flow passage (31), a damping flow passage (32) and a vortex flow passage (33) which are connected with each other are arranged in the energy consumption unit (3).

4. A hydraulic oscillating table residual energy safety release device according to claim 3, characterized in that the deceleration flow passage (31) comprises a first flow passage and a second flow passage, the first flow passage and the second flow passage are connected, the diameter of the first flow passage is smaller than that of the second flow passage, and hydraulic oil flows from the first flow passage to the second flow passage.

5. The residual energy safety release device of the hydraulic vibration table according to claim 3, wherein the damping flow passage (32) comprises a third flow passage, a damping block (34), and an elastic body (35) for compressing or displacing under the pressure of hydraulic oil, the hydraulic oil flows in from a first end of the third flow passage, the elastic body (35) and the damping block (34) are both installed in the third flow passage, a first end of the elastic body (35) is arranged towards the first end of the third flow passage, and a second end of the elastic body (35) is connected with the damping block (34); the hydraulic oil flows out from the side wall of the third flow passage.

6. A hydraulic oscillating table residual energy safety release device according to claim 5, characterized in that the elastic body (35) is a baffle or a metal ball; the damping block (34) is a spring or a piston.

7. The hydraulic vibration table residual energy safety release device as claimed in claim 3, wherein: the vortex flow passage (33) comprises at least two flow passages which are connected at one position in a cross mode.

8. The hydraulic vibration table residual energy safety release device according to any one of claims 3 to 7, characterized in that: the first end of the deceleration flow channel (31) is connected with an oil source inlet, the second end of the deceleration flow channel (31) is connected with one end of the damping flow channel (32), and the vortex flow channel (33) is respectively connected with the deceleration flow channel (31), the damping flow channel (32), the energy accumulator (12) and an oil source distributor port (312).

Technical Field

The invention belongs to the technical field of hydraulic equipment, and particularly relates to a residual energy safety release device for a hydraulic vibration table.

Background

When the hydraulic vibration table works, the actuator is frequently reversed, accelerated and changed in speed, the flow of the required hydraulic oil is changed violently, so that the flow of the hydraulic oil discharged into the oil return pipeline system is changed along with the change of the flow of the hydraulic oil, and the changed flow of the hydraulic oil rushing in causes the hydraulic oil to generate obvious energy impact on the pipeline system. The oil energy impact has larger kinetic energy, and is in periodic pulsation along with the work of an actuator, thereby generating adverse effects on the normal work of the hydraulic vibration table device and an oil return pipeline.

Because the strong periodic pulsation of the hydraulic vibration table easily causes mechanical vibration of pipelines, equipment, instruments and the like on the pipelines, measures such as reinforcing resonance points of the pipelines or performing soft coating on the pipelines are usually adopted in engineering, and although the abrasion to the devices and the pipelines can be reduced to a certain extent, the pulsation cannot be eliminated. And the position of reinforcing point is selected and can not adapt to a plurality of operating condition of actuator, and the soft cladding measure makes the heat dissipation more difficult in the oil circuit, causes the oil circuit temperature to rise, is unfavorable for maintaining the working property of hydraulic oil. Therefore, for an oil return pipeline of the hydraulic vibration table, a residual energy release device is additionally arranged to reduce hydraulic impact and flow/pressure pulsation so as to achieve the purpose of safely releasing residual energy.

The remaining energy release devices of hydraulic devices are generally divided into two categories: the first type is active type, the device generates a secondary pressure pulsation wave with the same amplitude and phase difference with the pressure pulsation of the hydraulic actuator, and the pulsation wave is superposed with the pressure pulsation wave generated by the hydraulic actuator so as to eliminate the pressure pulsation in a pipeline, such as an interference filter, a T-shaped filter and the like; the second type is passive type, the device applies work by absorbing hydraulic oil to convert or consume energy, for example, an energy accumulator is arranged near a hydraulic impact source, a separation device is adopted between liquid and gas, and the pulsating energy of fluid in a pipeline is absorbed by utilizing the compression performance of the gas; or a pre-stretched flexible membrane is arranged in the pipeline to serve as a vibration absorption element, when fluid pulsation of certain frequency and the membrane resonate, the fluid pulsation is converted into mechanical vibration, and then the vibration energy is consumed through internal damping.

In the method for reducing the energy pulsation of the hydraulic actuator, the pulsation eliminating effect of the active device is good, but the method is single in applicability and high in cost, signal tests such as pressure pulsation or flow and the like are required during specific implementation, and active control is performed by using a control algorithm according to a test result. In the passive method and device, the energy accumulator can eliminate pulsation to some extent, but it can store energy without consuming energy. In addition, there are other types or structures of pulsation attenuators, such as thin plate vibration type pulsation attenuators and T-type filters, but their natural frequencies are required to be adapted to the pulsation frequency of the fluid, and the applicable frequency range is limited.

Therefore, the residual energy safety release device for the hydraulic vibration table is invented, hydraulic impact and pressure pulsation are reduced, pipeline vibration is reduced, site environment noise is reduced, and safe use of the hydraulic vibration table is ensured.

Disclosure of Invention

To solve the problems set forth in the background art described above. The invention provides a residual energy safety release device for a hydraulic vibration table.

In order to achieve the purpose, the invention provides the following technical scheme:

a hydraulic vibration table residual energy safety release device comprises:

the input end of the energy storage unit is connected with the oil return output end of the hydraulic vibration table, and the output end of the energy storage unit is connected with the input end of the vibration absorption unit; the energy storage unit is connected with an energy accumulator;

the vibration absorption unit is used for reducing the vibration of the pipeline; the output end of the vibration absorption unit is connected with the input end of the energy consumption unit;

the energy consumption unit is used for consuming fluid kinetic energy and reducing fluid pressure, the output end of the energy consumption unit is connected with the port of the oil source distributor, and the energy accumulator is connected to the energy consumption unit.

Specifically, the vibration absorption unit is formed into a tubular structure, the vibration absorption unit comprises a flexible wall, a strength wall and a rubber wall, the flexible wall, the strength wall and the rubber wall are formed into the tubular structure, the strength wall and the rubber wall are combined into a combined layer, the combined layer is at least one layer, in the combined layer, the strength wall is arranged on the inner layer, the rubber wall is arranged on the outer layer, the strength wall is connected with the rubber wall, and the combined layer of the at least one layer is wrapped outside the flexible wall.

Specifically, a deceleration flow channel, a damping flow channel and a vortex flow channel which are connected with each other are arranged in the energy consumption unit.

Furthermore, the deceleration flow passage comprises a first flow passage and a second flow passage, the first flow passage is connected with the second flow passage, the diameter of the first flow passage is smaller than that of the second flow passage, and hydraulic oil flows from the first flow passage to the second flow passage.

Furthermore, the damping flow channel comprises a third flow channel, a damping block and an elastic body for compressing or displacing under the action of the pressure of hydraulic oil, the hydraulic oil flows in from the first end of the third flow channel, the elastic body and the damping block are both arranged in the third flow channel, the first end of the elastic body is arranged towards the first end of the third flow channel, and the second end of the elastic body is connected with the damping block; the hydraulic oil flows out from the side wall of the third flow passage.

Preferably, the elastomer is a baffle or a metal ball; the damping block is a spring or a piston.

Further, the vortex flow passage comprises at least two flow passages, and the at least two flow passages are connected at one position in a cross mode.

Specifically, a first end of the deceleration flow channel is connected with an oil source inlet, a second end of the deceleration flow channel is connected with one end of the damping flow channel, and the vortex flow channel is respectively connected with ports of the deceleration flow channel, the damping flow channel, the energy accumulator and the oil source distributor.

Compared with the prior art, the invention has the beneficial effects that:

the application realizes the safe release of the residual energy of the hydraulic vibration table with large flow and high flow rate, reduces the hydraulic impact and pressure pulsation of an oil return pipeline, and meets the requirements of vibration reduction and protection of the pipeline of the hydraulic vibration table.

Drawings

FIG. 1 is a flow chart of a method for designing a residual energy safety release device according to the present application;

FIG. 2 is a schematic structural diagram of a residual energy safety release device of a hydraulic vibration table in the application;

FIG. 3 is a cross-sectional view of a vibration canceling unit of the present application;

FIG. 4 is a side view of a dissipating unit of the present application;

FIG. 5 is a schematic sectional view taken along line A-A in FIG. 4;

FIG. 6 is a perspective view of an energy dissipating unit of the present application;

in the figure:

1. an energy storage unit; 11. a first flange; 12. an accumulator; 13. a connecting device;

2. a vibration eliminating unit; 21. a second flange; 22. a flexible wall; 23. a strength wall; 24. a rubber wall;

3. an energy consumption unit; 31. a deceleration flow passage; 32. a damping flow channel; 33. a vortex flow channel; 34. a damping block; 35. an elastomer; 36. branching; 37. a fork; 38. a mutation segment; 311. an oil source inlet; 312. an oil source distributor port.

41. A first flow passage; 42. a second flow passage; 43. a third flow path; 44. a fourth flow path; 45. a fifth flow channel; 46. a sixth flow path; 47. a seventh flow channel; 48. an eighth flow channel; 49. a ninth flow path; 410. a first rectangular flow channel; 411. a second rectangular flow channel;

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention provides the following technical scheme:

as shown in fig. 2, a residual energy safety releasing device of a hydraulic vibration table comprises:

the energy storage unit 1 is used for absorbing the pulsating energy, the input end of the energy storage unit 1 is connected with the oil return output end of the hydraulic vibration table, and the output end of the energy storage unit 1 is connected with the input end of the vibration absorption unit 2; the energy storage unit 1 is connected with an energy storage device 12;

a vibration damping unit 2 for reducing vibration of the pipeline; the output end of the vibration absorption unit 2 is connected with the input end of the energy consumption unit 3;

the energy consumption unit 3 is used for consuming fluid kinetic energy and reducing fluid pressure, the output end of the energy consumption unit 3 is connected with the port 312 of the oil source distributor, and the energy accumulator 12 is connected to the energy consumption unit 3.

In this embodiment, the energy storage unit 1 may be an airbag type energy storage device or a diaphragm type energy storage device, when the hydraulic oil pressure in the flow channel is higher than the preset pressure of the energy storage unit, the hydraulic oil enters the energy storage cavity of the energy storage device 12 with lower pressure under the driving of high pressure, when the pressure in the flow channel is lower than the pressure in the energy storage cavity, the hydraulic oil flows out from the energy storage cavity of the energy storage device 12, and the energy storage unit absorbs and releases energy when the flow rate and the pressure change, so as to reduce pressure pulsation and hydraulic impact.

As shown in fig. 3, the vibration damping unit 2 is formed in a tubular structure, the vibration damping unit 2 includes a flexible wall 22 formed in a tubular structure, a strength wall 23, and a rubber wall 24, the strength wall 23 and the rubber wall 24 constitute a combined layer, the combined layer is at least one layer, in the combined layer, the strength wall 23 is on an inner layer, the rubber wall 24 is on an outer layer, the strength wall 23 and the rubber wall 24 are connected, and the combined layer of at least one layer is coated outside the flexible wall 22.

In the embodiment, the flexible wall 22 is subjected to the pulsation action of the oil return pipeline fluid at the inner side of the pipeline fluid and transmits pressure to the middle wall surface, the wall surface of the damping pipe is displaced and deformed under the action of stress, and the pulsation energy of the hydraulic oil is converted in a form of doing work; the changed vibration-damping inner wall reacts on the surface of the fluid to change the motion direction and the stress magnitude of the fluid, so that the aim of attenuating flow pulsation and pressure pulsation in the flow channel is fulfilled. Meanwhile, the rigidity of the flexible wall 22 and the rubber wall 24 is small, and the vibration caused by the hydraulic actuator is absorbed and consumed when passing through the vibration absorption unit 2, so that the transmission to a subsequent pipeline is reduced, and the vibration absorption effect is achieved.

The strength wall 23 receives the pressure transmitted from the flexible wall 22 and transmits the pressure to the rubber wall 24, and the strength wall 23 restricts the flexible wall 22 from large displacement with a certain rigidity.

As shown in fig. 5 and 6, the energy consumption unit 3 is provided therein with a deceleration flow passage 31, a damping flow passage 32, and a swirl flow passage 33 connected to each other.

As shown in fig. 5 and 6, the deceleration flow path 31 includes a first flow path 41 and a second flow path 42, the first flow path 41 and the second flow path 42 are connected, the diameter of the first flow path 41 is smaller than the diameter of the second flow path 42, and the hydraulic oil flows from the first flow path 41 to the second flow path 42.

In the present embodiment, the second flow passage 42 has a larger passage cross section than the first flow passage 41, and may have an abrupt cross section or a gradually expanding cross section.

As shown in fig. 5 and 6, the damping flow passage 32 includes a third flow passage 43, a damping block 34, and an elastic body 35 for compressing or displacing under the pressure of hydraulic oil, the hydraulic oil flows in from a first end of the third flow passage 43, the elastic body 35 and the damping block 34 are both installed in the third flow passage 43, a first end of the elastic body 35 is disposed toward a first end of the third flow passage 43, and a second end of the elastic body 35 is connected to the damping block 34; the hydraulic oil flows out from the side wall of the third flow passage 43.

In the embodiment, the elastic body 35 is positioned in the flow channel and occupies part of the flow channel space, the fluid acts on the elastic body 35, the fluid pressure pushes the elastic body 35 to move towards the damping block 34, the elastic body 35 consumes the fluid energy through deformation or movement, and the damping block 34 compresses the volume to absorb and convert the energy.

Preferably, the elastomer 35 is a baffle or a metal ball; the damping mass 34 is a spring or piston.

Further, the vortex flow passage 33 includes at least two flow passages, and at least two flow passages are connected to one point in a cross manner, so that the vortex effect can be generated by combining the two flow passages.

As shown in fig. 4 to 6, a first end of the deceleration flow passage 31 is connected to the oil source inlet, a second end of the deceleration flow passage 31 is connected to one end of the damping flow passage 32, and the scroll flow passage 33 is connected to the deceleration flow passage 31, the damping flow passage 32, the accumulator 12, and the oil source distributor port 312, respectively.

In this embodiment, the oil-saving control device includes a set of deceleration flow channels 31 and a set of damping flow channels 32, a first end of the deceleration flow channel 31 is connected to an oil source inlet, a second end of the deceleration flow channel 31 is connected to one end of the damping flow channel 32, six linear flow channels from a fourth flow channel 44 to a ninth flow channel 49 are provided, two rectangular flow channels are provided, a side wall of the first flow channel 41 is connected to a first end of the fourth flow channel 44, a second end of the fourth flow channel 44 is connected to one energy accumulator 12, a side wall of the second flow channel 42 is connected to a first edge middle portion of the first rectangular flow channel 410 through a fifth flow channel 45, a side wall of the second flow channel 42 is connected to a first edge middle portion of the second rectangular flow channel 411 through a sixth flow channel 46, a first end of the seventh flow channel 47 is connected to a side wall of the fourth flow channel 44, a second end of the seventh flow channel 47 is connected to an oil source distributor port 312, and a position, The first end of the eighth flow channel 48 is connected, the other position of the seventh flow channel 47 is respectively connected with the middle part of the second edge of the second rectangular flow channel 411 and the first end of the ninth flow channel 49, the first edge and the second edge of the rectangular flow channel are opposite, and the second end of the eighth flow channel 48 and the second end of the ninth flow channel 49 are both connected with an energy accumulator; the junction of the first flow channel 41 and the fourth flow channel 44 is a fork 38, the junction of the fourth flow channel 44 and the seventh flow channel 47 is a branch 36, and the intersection of the second middle portions of the first rectangular flow channel 410 and the second rectangular flow channel 411 is the vortex flow channel 33.

In the present embodiment, the deceleration flow path 31, the damping flow path 32, and the scroll flow path 33 may be combined in a two-dimensional space and a three-dimensional space in different order.

In the present embodiment, when the hydraulic oil flows through the deceleration flow path 31 whose cross section is increased, the flow rate of the hydraulic oil is decreased according to the mass conservation law to reduce the kinetic energy; hydraulic oil enters the damping flow channel 32, and the elastic body 35 and the damping block 34 absorb fluid pressure pulsation energy through deformation work and energy conversion; after the hydraulic oil enters the vortex flow passage 33, the hydraulic fluid generates local pressure loss at the local change position (branch 36, fork 38 and abrupt change section 37) of the flow passage, so that the energy of the hydraulic oil is reduced; meanwhile, in the vortex position, hydraulic oil flows more disorderly, and fluid dynamic pressure energy is dissipated through turbulent vortex.

As shown in fig. 1, a flow chart of a design method of a residual energy safety release device is shown, and the specific steps are as follows:

1. calculating the oil return pressure or actually testing the oil return pressure parameter of the hydraulic vibration table according to the working characteristics of the hydraulic vibration table;

2. obtaining the frequency of the oil return pipeline according to the design or actual test of the oil return pipeline;

3. providing indexes or requirements for reducing oil return pressure pulsation and reducing pipeline vibration;

4. calculating and selecting the type of the energy accumulator on the energy storage unit by using the oil return pressure parameter;

5. performing vibration absorption unit model selection by utilizing the installation environment of the hydraulic vibration table and the pipeline condition;

6. design checking such as a vortex flow passage, a deceleration flow passage and the like is carried out by combining the installation conditions, and the natural frequency of an oil return pipeline needs to be avoided;

7. and evaluating the effect of the residual energy safety release device through simulation analysis or testing.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.