Constant-pressure box body for vibration equipment

Abstract

The invention belongs to the technical field of vibration and noise reduction equipment, and particularly relates to a constant-pressure box for vibration equipment. Comprising an upper cavity, a lower cavity and a middle partition plate arranged between the upper cavity and the lower cavity. The drivable workbench is connected with the reverse workbench through a first flexible connecting piece. According to the invention, the working table and the reverse working table are driven by the vibration system to perform reverse cooperative movement, so that the volume changes of the upper and lower chambers are offset, thereby fundamentally eliminating the pressure pulsation caused by periodic compression and expansion of gas, isolating the excitation of the vibration system to the box body structure from the source, obviously reducing the radiation noise, and improving the working efficiency. According to the technical scheme, the effect of suppressing low-frequency vibration noise is particularly outstanding, the structure of the scheme is clear, efficient dynamic isolation and sealing are achieved through the flexible sealing assembly, meanwhile, the upper cavity and the lower cavity are completely separated, materials or media in the working bin are effectively prevented from entering the vibration system bin, and cleanliness and operation reliability of a core vibration part are guaranteed.

Description

Technical Field

[0001] This invention relates to the field of vibration reduction and noise reduction equipment technology, specifically a constant pressure chamber for vibration equipment. Background Technology

[0002] The noise and vibration generated by vibrating equipment during operation seriously affect the working environment and the health of operators. In recent years, in order to further improve the technology of vibration reduction and noise reduction, scientists have invented many vibration reduction and noise reduction metamaterials, most of which are passive sound insulation materials. These metamaterials are mostly periodically distributed structures that use the principles of reflection or local resonance to form "bandgap" characteristics for vibrations or noises of different frequencies. To achieve effective noise reduction, it is often necessary to increase the structural volume and complexity; and it is difficult to eliminate the energy transfer between the vibration system and the enclosure at the root, resulting in unsatisfactory performance.

[0003] Therefore, we propose a constant pressure chamber for vibration equipment to solve the above problems. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this invention provides a constant pressure enclosure for vibration equipment, which solves the problems mentioned in the background section regarding the difficulty of eliminating low-frequency vibration transmission at its source and the complexity of existing passive sound insulation technologies.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the present invention specifically adopts the following technical solution:

[0008] A constant pressure chamber for a vibration device, comprising:

[0009] Upper chamber, lower chamber, and the partition between them;

[0010] The drivable worktable and the reverse worktable are connected by a first flexible connector, and the reverse worktable is connected to the middle partition by a second flexible connector.

[0011] The worktable, the first flexible connector, the reverse worktable, and the second flexible connector together constitute a flexible sealing assembly that spans the middle partition, which dynamically seals and isolates the upper chamber from the lower chamber.

[0012] Furthermore, the flexible sealing assembly, together with the middle partition, separates and seals the upper chamber and lower chamber into two independent sealed chambers.

[0013] Furthermore, the worktable and the reverse worktable are configured to generate vibrations with the same frequency but opposite directions, and the product of the vibration displacement of the worktable and its effective area is equal to the product of the vibration displacement of the reverse worktable and its effective area.

[0014] Furthermore, the first flexible connector and the second flexible connector are annular pleated flexible connectors or corrugated flexible connectors.

[0015] Furthermore, both the first flexible connector and the second flexible connector are made of silicone or rubber materials.

[0016] Furthermore, the walls of the upper and lower chambers are covered with vibration damping layers or sound-absorbing layers.

[0017] Furthermore, the first flexible connector is disposed between the worktable and the reverse worktable; the first flexible connector has a first connecting edge and a second connecting edge, the first connecting edge being detachably connected to the worktable by fasteners, and the second connecting edge being detachably connected to the reverse worktable by fasteners.

[0018] Furthermore, the second flexible connector is disposed between the reverse worktable and the middle partition; the second flexible connector has a third connecting edge and a fourth connecting edge, the third connecting edge being detachably connected to the reverse worktable by fasteners, and the fourth connecting edge being detachably connected to the middle partition by fasteners.

[0019] Furthermore, the upper chamber and the lower chamber together form a housing; the housing also includes:

[0020] A door that communicates with the upper chamber, and an observation window is provided on the door;

[0021] A strut is installed in the upper cavity to support the door.

[0022] An operation panel is provided on the inclined surface of the box body and continuously transitions to the side of the door.

[0023] In addition, a heat dissipation chamber is provided on the back of the housing, and a fan mounting position is provided on the side wall of the heat dissipation chamber.

[0024] A vibration device includes a constant pressure chamber for the vibration device and a vibration system installed in the lower chamber, the vibration system being driven connected to a worktable and a reverse worktable.

[0025] (III) Beneficial Effects

[0026] Compared with the prior art, the present invention provides a constant pressure chamber for vibration equipment, which has the following advantages:

[0027] This invention utilizes the counter-coordinated motion of the worktable and the reverse worktable driven by the vibration system to cancel out the volume changes of the upper and lower chambers, thereby fundamentally eliminating the pressure pulsation caused by the periodic compression and expansion of the gas. This isolates the excitation of the housing structure by the vibration system from the source, significantly reducing radiated noise, especially with outstanding suppression of low-frequency vibration noise. The structure of this solution is clear, and efficient dynamic isolation and sealing are achieved through flexible sealing components. At the same time, the upper and lower chambers are completely separated, effectively preventing materials or media in the working chamber from entering the vibration system chamber, ensuring the cleanliness and operational reliability of the core vibration components. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the box structure of the present invention;

[0029] Figure 2 This is a schematic diagram of the door structure of the present invention;

[0030] Figure 3 This is a schematic diagram of the flexible sealing assembly structure of the present invention;

[0031] Figure 4 This is an exploded view of the flexible sealing component structure of the present invention;

[0032] Figure 5 This is a cross-sectional view of the flexible sealing assembly structure of the present invention;

[0033] Figure 6 for Figure 5 Enlarged view of the structure at point A in the middle;

[0034] Figure 7 This is a schematic diagram showing the noise comparison data of the vibration device of the present invention before and after the installation of this housing.

[0035] In the diagram: 1. Upper chamber; 2. Lower chamber; 3. Middle partition; 4. Worktable; 5. Reverse worktable; 6. First flexible connector; 7. Second flexible connector; 8. Flexible sealing assembly; 9. First connecting edge; 10. Second connecting edge; 11. Third connecting edge; 12. Fourth connecting edge; 13. Fastener; 14. Housing; 141. Door; 142. Observation window; 143. Sloping surface; 144. Operation panel; 145. Heat dissipation chamber; 146. Fan mounting position; 147. Support rod. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] Example 1

[0038] like Figure 1-6 As shown, an embodiment of the present invention provides a constant pressure chamber for a vibration device, comprising:

[0039] Upper chamber 1, lower chamber 2, and a partition 3 disposed between the two;

[0040] The drivable worktable 4 and the reverse worktable 5 are connected by a first flexible connector 6, and the reverse worktable 5 is connected to the middle partition 3 by a second flexible connector 7.

[0041] The worktable 4, the first flexible connector 6, the reverse worktable 5, and the second flexible connector 7 together constitute a flexible sealing assembly 8 that spans the middle partition 3. This flexible sealing assembly 8 dynamically seals and isolates the upper chamber 1 from the lower chamber 2.

[0042] like Figure 1-6 As shown, in some embodiments, the flexible sealing assembly 8 and the middle partition 3 together separate and seal the upper chamber 1 and the lower chamber 2 into two independent sealed chambers.

[0043] The flexible sealing assembly 8 and the middle partition 3 together separate and seal the upper chamber 1 and the lower chamber 2 into two independent sealed chambers; the middle partition 3 acts as a static partition, while the flexible sealing assembly 8 acts as a dynamic partition. The two work together to physically completely separate the internal space defined by the housing 14; its beneficial effects are specifically reflected in:

[0044] First, it achieves both rigid and flexible dual isolation between the upper chamber 1 and the lower chamber 2, allowing the upper chamber 1 to serve as a working chamber for containing the materials to be processed or the working medium, while the lower chamber 2 serves as a vibration system chamber for containing and isolating the vibration system. This isolation effectively prevents objects or media in the upper chamber 1 from entering or falling into the lower chamber 2 during equipment operation. For vibratory equipment used in material processing, this structure can ensure the cleanliness of the core vibration system, protecting it from contamination by the processed materials.

[0045] Second, it provides the necessary structural basis for forming two independent airtight spaces, which is a prerequisite for maintaining constant gas pressure in each chamber by means of the reverse movement of the worktable 4 and the reverse worktable 5.

[0046] like Figure 1-6 As shown, in some embodiments, the worktable 4 and the reverse worktable 5 are configured to generate vibrations with the same frequency but opposite directions, and the product of the vibration displacement of the worktable 4 and its effective area is equal to the product of the vibration displacement of the reverse worktable 5 and its effective area.

[0047] Both the worktable 4 and the reverse worktable 5 are directly connected to the vibration system, receiving its drive and working according to the motion relationship determined above. When the movement of the worktable 4 causes a change in the volume of one chamber, the reverse movement of the reverse worktable 5, following the above motion relationship, will cause an equal and opposite change in the volume of the other chamber. This ensures that the sum of the volumes of the two independent sealed chambers, the upper chamber 1 and the lower chamber 2, remains constant at any moment during the vibration process. This fundamentally eliminates the periodic compression and expansion of the gas in the chamber, keeping the gas pressure stable and minimizing the source of vibration and radiated noise caused by gas pressure pulsation in the housing 14, especially with significant suppression of low-frequency noise. At the same time, the vibration system no longer needs to do work for compressing the gas, eliminating the gas load and thus improving the working efficiency of the vibration system itself.

[0048] like Figure 1-6 As shown, in some embodiments, the first flexible connector 6 and the second flexible connector 7 are annular pleated flexible connectors or corrugated flexible connectors.

[0049] The first flexible connector 6 and the second flexible connector 7 are constructed using a pleated or corrugated shape with axial expansion and contraction deformation capability. This special geometry allows the connector to withstand and adapt to a larger amount of expansion and contraction deformation in the axial direction, thereby allowing a larger relative vibration displacement between the worktable 4 and the reverse worktable 5, providing protection for large-amplitude vibration conditions. At the same time, the pleated or corrugated structure can distribute the deformation stress more evenly, reduce local stress concentration, effectively delay fatigue damage caused by repeated deformation of the material, and significantly enhance the reliability and service life of the flexible sealing assembly 8 under long-term dynamic operation.

[0050] like Figure 1-6 As shown, in some embodiments, the first flexible connector 6 and the second flexible connector 7 are both made of silicone or rubber material.

[0051] The first flexible connector 6 and the second flexible connector 7 are manufactured using specific materials with high elasticity, high airtightness, and good fatigue resistance. The silicone or rubber material can fit tightly with the connecting surfaces of the worktable 4, the reverse worktable 5, and the partition 3 to form a reliable static and dynamic seal, ensuring effective dynamic sealing and isolation between the upper chamber 1 and the lower chamber 2 and preventing gas leakage. At the same time, the material's own flexibility and damping characteristics can absorb some vibration energy, further assisting in suppressing vibration transmission, and ensuring that the connection is not prone to cracking or failure under long-term high-frequency reciprocating deformation. This is the key material guarantee for achieving the "dynamic sealing and isolation" function.

[0052] like Figure 1-6As shown, in some embodiments, the walls of the upper chamber 1 and the lower chamber 2 are covered with a vibration damping layer or a sound-absorbing layer.

[0053] A layer of material with energy dissipation or sound wave absorption characteristics is added to the main structure of the enclosure 14; this complements the core constant pressure noise reduction principle, constructing a multi-layered noise reduction system; the vibration damping layer (such as constraint layer damping material) can effectively suppress the mid-to-low frequency structural vibration and noise radiation generated by the wall panels of the enclosure 14 due to their own resonance or residual excitation; the sound absorption layer (such as porous sound absorption material) can effectively absorb the mid-to-high frequency airborne sound waves propagating in the cavity; the combination of the two can further broaden the effective noise reduction frequency band of the entire enclosure 14 and improve the comprehensive treatment effect of broadband noise.

[0054] like Figure 1-6 As shown, in some embodiments, the first flexible connector 6 is disposed between the worktable 4 and the reverse worktable 5; the first flexible connector 6 has a first connecting edge 9 and a second connecting edge 10, the first connecting edge 9 is detachably connected to the worktable 4 by a fastener 13, and the second connecting edge 10 is detachably connected to the reverse worktable 5 by a fastener 13.

[0055] Through clear boundary division and a detachable mechanical connection, the first flexible connection is firmly clamped and sealed between the worktable 4 and the reverse worktable 5. First, the clamping force applied by the fasteners 13 (such as bolts) ensures that a uniform and reliable sealing surface is formed between the connection edge and the rigid component, preventing gas leakage. Second, the "detachable" design allows the first flexible connection, worktable 4, or reverse worktable 5 to be replaced or maintained independently, greatly improving the maintainability of the equipment, reducing long-term maintenance costs, and making the assembly process of the core flexible sealing component 8 more standardized and reliable.

[0056] like Figure 1-6 As shown, in some embodiments, the second flexible connector 7 is disposed between the reverse worktable 5 and the middle partition 3; the second flexible connector 7 has a third connecting edge 11 and a fourth connecting edge 12, the third connecting edge 11 being detachably connected to the reverse worktable 5 by fastener 13, and the fourth connecting edge 12 being detachably connected to the middle partition 3 by fastener 13.

[0057] The second flexible connector 7 is connected in the same way as the first flexible connector 6. It completes the connection between the flexible sealing assembly 8 and the static structure (middle partition 3) of the housing 14. Through the same detachable fastening method, the reverse worktable 5 and the entire flexible sealing assembly 8 are reliably installed and sealed on the middle partition 3. This structure not only ensures the airtightness of the connection at this point, but also modularizes the flexible sealing assembly 8, so that the entire assembly (including the worktable 4, the reverse worktable 5, and the first flexible connector 6 and the second flexible connector 7) can be installed, debugged or disassembled and repaired as a whole unit, which greatly facilitates the production assembly and after-sales maintenance process.

[0058] like Figure 1-6 As shown, in some embodiments, the upper chamber 1 and the lower chamber 2 together constitute a housing 14; the housing 14 further includes:

[0059] A door 141 is connected to the upper chamber 1, and an observation window 142 is provided on the door 141;

[0060] A strut 147 is provided in the upper chamber 1 to support the door 141;

[0061] An inclined surface 143 is provided on the housing 14 and continuously transitions to the side of the door 141. An operation panel 144 is provided on the inclined surface 143.

[0062] In addition, a heat dissipation chamber 145 is provided on the back of the housing 14, and a fan mounting position 146 is provided on the side wall of the heat dissipation chamber 145.

[0063] The door 141 facilitates the loading, unloading, and maintenance of materials in the upper chamber 1 (working compartment); the observation window 142 allows real-time observation of the internal working status without opening the door 141; the support rod 147 uses a gas spring, which makes opening the door easier, and can also be opened automatically by an electric push rod, improving operational safety and convenience; a sealing ring is also provided at the connection between the door 141 and the housing 14 to improve the stability of the door 141 and housing 14 after closure; the inclined surface 143 integrated with the door 141 and the operation panel 144 set on it are ergonomic, making the equipment look neat and comfortable to operate; the independent heat dissipation chamber 145 and the reserved fan installation position 146 provide an efficient forced heat dissipation channel for heat-generating components such as the vibration drive source in the lower chamber 2, ensuring that the internal temperature of the equipment is within a reasonable range during long-term continuous operation, thus ensuring the reliability and lifespan of the whole machine.

[0064] A vibration device includes a constant pressure chamber for the vibration device and a vibration system installed in the lower chamber 2, wherein the vibration system is drivenly connected to a worktable 4 and a reverse worktable 5.

[0065] The constant pressure chamber 14 is integrated as a core module with the vibration system that generates vibration, thus forming a complete and independently operating terminal device. This vibration equipment (such as an ultrasonic cleaner, vibrating screen, vibration test bench, etc.) not only inherits all the advantages of the aforementioned constant pressure chamber 14—including extremely low noise radiation (especially for low-frequency noise), higher energy efficiency, good cleaning isolation, and excellent maintainability; but also, as a fully functional product, these advantages directly translate into significant market competitiveness; providing users with an efficient and quiet integrated solution that addresses vibration and noise problems at their source.

[0066] Example 2

[0067] The constant pressure chamber 14 of the present invention is particularly suitable for sound insulation and noise reduction of acoustic resonance equipment. In this application scenario, the worktable 4 is used as the mounting base or part of the load unit (such as a vibrating head or tool head) of the acoustic resonance equipment, while the reverse worktable 5 is used as a counterweight unit or part of the reaction unit to balance the reaction force. The vibration system of the entire acoustic resonance equipment is installed in the lower chamber 2 and drives the worktable 4 and the reverse worktable 5 to generate vibrations with the same frequency and opposite direction.

[0068] To verify the vibration reduction and noise reduction effect of the constant pressure enclosure 14, a series of acoustic resonance devices of different magnitudes were tested. The test conditions were: the equipment was running unloaded, and the noise level was measured 1 meter directly in front of the equipment. The noise comparison data before and after installing the enclosure 14 of this invention are as follows: Figure 7 As shown.

[0069] Depend on Figure 7 The data shows that, after adopting the constant pressure enclosure 14 of the present invention, the radiated noise of acoustic resonance devices of different weights (from 100 grams to 5000 grams) is significantly reduced, with a reduction of 7-9 dBA. This proves that the constant pressure enclosure 14 provided by the present invention can effectively isolate and eliminate the structural noise and aerodynamic noise of the enclosure 14 directly excited by the vibration system, and has an excellent suppression effect on specific low-frequency noise generated by acoustic resonance devices, thus verifying the outstanding vibration reduction and noise reduction performance of the present invention.

[0070] The specific reverse motion drive mechanism between worktable 4 and the reverse worktable 5 is not the focus of this invention. Those skilled in the art will understand that conventional techniques such as symmetrical electromagnetic drives, mechanical linkages, opposed pistons, or phase-adjustable dual-output-shaft motors can be used to enable a vibration system to output the required coordinated motion. The core innovation of this invention lies in proposing a dynamic balance structure composed of the flexible sealing assembly 8, and a technical solution that configures the vibration displacement and effective area of ​​the two worktables (worktable 4 and reverse worktable 5) to satisfy the specific mathematical relationship. Through this solution, regardless of the specific drive mechanism used, as long as the two achieve the stated motion relationship, the fundamental goals of dynamic constant pressure and vibration isolation / noise reduction can be achieved.

[0071] In summary, by using the counter-coordinated motion of the worktable 4 and the reverse worktable 5 driven by the vibration system, the volume changes of the upper and lower chambers 2 cancel each other out, thereby fundamentally eliminating the pressure pulsation caused by the periodic compression and expansion of the gas. This isolates the excitation of the vibration system on the structure of the housing 14 from the source, significantly reducing radiated noise, especially with outstanding suppression of low-frequency vibration noise. The structure of this solution is clear, and efficient dynamic isolation and sealing are achieved through the flexible sealing component 8. At the same time, the upper chamber 1 and the lower chamber 2 are completely separated, effectively preventing materials or media in the working chamber from entering the vibration system chamber, ensuring the cleanliness and operational reliability of the core vibration components.

[0072] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A constant pressure chamber for a vibration device, characterized in that, include: Upper chamber (1), lower chamber (2) and a partition (3) between the two; The driveable worktable (4) and the reverse worktable (5) are connected by a first flexible connector (6), and the reverse worktable (5) is connected to the middle partition (3) by a second flexible connector (7). The worktable (4), the first flexible connector (6), the reverse worktable (5) and the second flexible connector (7) together constitute a flexible sealing assembly (8) spanning the middle partition (3), which dynamically seals and isolates the upper chamber (1) and the lower chamber (2).

2. The constant pressure chamber for a vibration device according to claim 1, characterized in that: The flexible sealing assembly (8) and the middle partition (3) together separate and seal the upper chamber (1) and the lower chamber (2) into two independent sealed chambers.

3. The constant pressure chamber for a vibration device according to claim 1, characterized in that: The worktable (4) and the reverse worktable (5) are configured to generate vibrations with the same frequency and opposite directions, and the product of the vibration displacement of the worktable (4) and its effective area is equal to the product of the vibration displacement of the reverse worktable (5) and its effective area.

4. A constant pressure chamber for a vibration device according to claim 1, characterized in that: The first flexible connector (6) and the second flexible connector (7) are annular pleated flexible connectors or corrugated flexible connectors.

5. A constant pressure chamber for a vibration device according to claim 1, characterized in that: Both the first flexible connector (6) and the second flexible connector (7) are made of silicone or rubber.

6. A constant pressure chamber for a vibration device according to claim 1, characterized in that: The walls of the upper chamber (1) and the lower chamber (2) are covered with a vibration damping layer or a sound absorbing layer.

7. A constant pressure chamber for a vibration device according to claim 1, characterized in that: The first flexible connector (6) is disposed between the worktable (4) and the reverse worktable (5); the first flexible connector (6) has a first connecting edge (9) and a second connecting edge (10), the first connecting edge (9) is detachably connected to the worktable (4) by fasteners (13), and the second connecting edge (10) is detachably connected to the reverse worktable (5) by fasteners (13).

8. A constant pressure chamber for a vibration device according to claim 1, characterized in that: The second flexible connector (7) is disposed between the reverse worktable (5) and the middle partition (3); the second flexible connector (7) has a third connecting edge (11) and a fourth connecting edge (12), the third connecting edge (11) is detachably connected to the reverse worktable (5) by fasteners (13), and the fourth connecting edge (12) is detachably connected to the middle partition (3) by fasteners (13).

9. A constant pressure chamber for a vibration device according to claim 1, characterized in that: The upper chamber (1) and the lower chamber (2) together constitute a box (14); the box (14) further includes: A door (141) is connected to the upper chamber (1), and an observation window (142) is provided on the door (141). A strut (147) is provided in the upper chamber (1) to support the door (141). An inclined surface (143) is provided on the box body (14) and continuously transitions to the side of the door body (141), and an operation panel (144) is provided on the inclined surface (143). In addition, a heat dissipation chamber (145) is provided on the back of the housing (14), and a fan mounting position (146) is provided on the side wall of the heat dissipation chamber (145).

10. A vibration device, characterized in that, The device includes a constant pressure chamber for vibration equipment as described in any one of claims 1 to 9, and a vibration system installed in the lower chamber (2), the vibration system being driven connected to the worktable (4) and the reverse worktable (5).

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