Metallic support hanger with invariable frequency and poleless adjustment

Abstract

The application discloses inherent frequency stepless adjustable metal support hanger, belongs to the technical field of vibration and noise reduction. The support hanger is composed of pipeline installation assembly, inherent frequency adjusting assembly and installation support assembly, the pipeline installation assembly contains upper clasp ring, lower clasp ring, clasp ring fastener and metal rubber part; the inherent frequency adjusting assembly includes first square steel, fastening bolt and adjusting sliding block elliptical adjusting track; the installation support assembly is composed of second square steel and installation backing plate. By adjusting the symmetric movement of the adjusting sliding block in the adjusting track long strip-shaped opening, the effective support length is changed to realize continuous stepless adjustment of stiffness and inherent frequency. The application adopts full metal structure, is resistant to aging and radiation, has long service life, can match complex pipeline vibration working conditions of ships and the like, significantly improves the vibration isolation effect, is convenient to adjust and has high engineering application value.

Description

Technical Field

[0001] This invention belongs to the field of vibration reduction and noise reduction technology, specifically relating to a metal support bracket with infinitely adjustable natural frequency. Background Technology

[0002] In shipboard piping systems, supports and hangers are typically used to mount the piping to the base to isolate the transmission of mechanical system piping vibrations. Due to significant differences in parameters such as piping thickness and medium flow velocity among different mechanical systems, the piping modes and vibration excitation exhibit complex and varied characteristics.

[0003] Existing pipeline vibration isolation supports suffer from the drawback of non-adjustable natural frequency, making it difficult to match the varying vibration conditions of pipelines. This results in poor vibration isolation performance and an inability to maintain optimal vibration isolation for extended periods. Furthermore, traditional supports are mostly made of rubber, whose service life is limited by factors such as rubber material aging and fatigue, restricting their application scenarios and service life. Therefore, developing a metal support with infinitely adjustable natural frequency and a long service life to address the problems of non-adjustable natural frequency, poor vibration isolation performance, and short service life in existing technologies has significant engineering application value. Summary of the Invention

[0004] (a) Purpose of the invention The purpose of this invention is to overcome the shortcomings of existing technologies, such as the inability to adjust the natural frequency of the support and hanger, poor vibration isolation effect, and easy aging of rubber materials. It provides a metal support and hanger with a stepless adjustment of its natural frequency, thereby achieving continuous stepless adjustment of the natural frequency of the support and hanger, improving the vibration isolation effect, and extending the service life.

[0005] (II) Technical Solution A metal support with infinitely adjustable natural frequency includes a pipe installation assembly, a natural frequency adjustment assembly, and an installation support assembly; The pipeline installation assembly is used to mount and fix the pipeline; the natural frequency adjustment assembly is welded to the pipeline installation assembly and is used to adjust the overall rigidity of the support; the installation support assembly is welded to the natural frequency adjustment assembly and is used to fix the support to the external base.

[0006] Furthermore, the pipeline installation assembly includes an upper retaining ring, a retaining ring fastener, a lower retaining ring, and a metal-rubber component; Both the upper and lower retaining rings are semi-circular metal strips with connecting structures at both ends, with the same radius and width. Corresponding openings are provided at both ends of the connecting structures. The retaining ring fastener consists of a screw, nut, flat washer, and spring washer. The retaining ring fastener passes through the openings to securely connect the upper and lower retaining rings. The metal rubber component is formed by casting, and the lower retaining ring is fixedly connected to the screw of the retaining ring fastener through the metal rubber component.

[0007] Furthermore, the inherent frequency adjustment assembly includes a first square steel, a fastening bolt, an adjustment slider, and an adjustment track; The first square steel is a rectangular hollow structure with the same width as the lower retaining ring. The adjustment track is an elliptical metal strip with the same width as the lower retaining ring. The adjustment track has four elongated openings that are symmetrically arranged in the top, bottom, left, and right. The length of the openings can be set according to requirements, and the width is the same as the bolt diameter, which is used to adjust the sliding installation of the slider. The adjusting sliders are two soft metal cuboids with a through hole in the middle. They are slidably installed in the elongated opening of the adjusting track by fastening bolts. The two adjusting sliders can move symmetrically along the elongated opening, and the stiffness of the support can be infinitely adjusted between the maximum and minimum stiffness by changing the distance.

[0008] Furthermore, the mounting support assembly includes a second square steel and a mounting pad; The second square steel is a rectangular hollow structure and is fixedly connected to the adjusting track; the mounting plate is a rectangular flat plate structure with chamfered corners, fixedly connected to the second square steel, and used for welding and fixing to the external base.

[0009] Working principle The natural frequency of a support bracket is directly related to its stiffness; the greater the stiffness, the higher the natural frequency, and the smaller the stiffness, the lower the natural frequency.

[0010] Pipeline vibration is transmitted to the natural frequency adjustment component via the pipeline installation assembly. Two adjusting sliders in the natural frequency adjustment component move symmetrically along the adjustment track: when the two sliders are close to each other to their minimum distance, the effective support length of the adjustment track is shortest, the overall stiffness is greatest, and the natural frequency of the support reaches its highest point; when the two sliders are far apart to their maximum distance, the effective support length of the adjustment track is longest, the overall stiffness is smallest, and the natural frequency of the support drops to its lowest point. By continuously changing the relative distance between the two adjusting sliders, the stiffness and natural frequency of the support can be continuously and steplessly adjusted between the highest and lowest values, allowing the natural frequency of the support to match the pipeline excitation frequency, avoiding the resonance range, and achieving optimal vibration isolation between the pipeline and the base.

[0011] The present invention also provides a method for assembling a metal support bracket with infinitely adjustable inherent frequency, comprising the following steps: S1 uses metal-rubber parts to connect the lower retaining ring to the screws of two sets of retaining ring fasteners through a casting process. Before casting, nuts and flat washers are pre-installed on the screws. The upper and lower retaining rings are connected by retaining ring fasteners to complete the assembly of the pipeline installation components. S2 welds and fixes the first square steel to the adjusting rail, and uses two sets of fastening bolts to fasten the adjusting rail to the two adjusting sliders, thus completing the assembly of the inherent frequency adjustment component. S3 welds and fixes the second square steel to the mounting plate, completing the fabrication of the installation support assembly; S4 welds and fixes the first square steel to the metal rubber part, and welds and fixes the second square steel to the lower side of the adjusting rail, thus completing the overall assembly of the metal support and hanger.

[0012] Beneficial effects By adjusting the relative distance between the two adjusting sliders, the natural frequency of the support can be continuously and steplessly adjusted between the highest and lowest values. This can match different pipeline vibration conditions, ensuring that the support is always in the optimal vibration isolation state and significantly reducing the transmission efficiency of pipeline vibration to the base.

[0013] Made entirely of metal, it possesses anti-aging and radiation-resistant properties, making it suitable for use in special environments such as those with radiation exposure. Compared to traditional rubber supports, its service life is significantly extended.

[0014] Stiffness and natural frequency can be adjusted by sliding the slider. The installation and debugging are simple and it is suitable for use in complex engineering scenarios such as ships. Attached Figure Description

[0015] Figure 1 This is a front view of the metal support bracket of the present invention; Figure 2 This is a side view of the metal support bracket of the present invention; Figure 3 This is a front view of the pipe installation assembly of the present invention; Figure 4 This is a front view of the inherent frequency adjustment component of the present invention; Figure 5 This is a top view of the inherent frequency adjustment component of the present invention; Figure 6 This is a schematic diagram of the installation support components of the present invention.

[0016] Correspondence of markings in the diagram: 100 - Pipeline installation assembly; 101 - Upper retaining ring; 102 - Retaining ring fastener; 103 - Lower retaining ring; 104 - Metal and rubber parts; 200 - Inherent frequency adjustment component; 201 - First square steel; 202 - Fastening bolt; 203 - Adjusting slider; 204 - Adjusting track; 300 - Mounting support assembly; 301 - Second square steel; 302 - Mounting pad. Detailed Implementation

[0017] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. Those skilled in the art can implement the invention by referring to the description. The described embodiments are only some embodiments of the present invention, and not all embodiments.

[0018] Example like Figures 1 to 6 As shown, a metal support with infinitely adjustable natural frequency includes a pipe installation assembly 100, a natural frequency adjustment assembly 200, and an installation support assembly 300.

[0019] Pipeline installation assembly 100 includes an upper retaining ring 101, a retaining ring fastener 102, a lower retaining ring 103, and a metal-rubber component 104. The upper retaining ring 101 and the lower retaining ring 103 are semi-circular metal strips with a radius of 100mm and a width of 40mm, and M12 openings at both ends. The retaining ring fastener 102 is an assembly of an M12 screw, nut, flat washer, and spring washer. The metal-rubber component 104 is 280mm long and 40mm wide, and is cast to connect the lower retaining ring 103 to the screw of the retaining ring fastener 102.

[0020] The natural frequency adjustment component 200 includes a first square steel bar 201, fastening bolts 202, adjusting sliders 203, and adjusting track 204. The first square steel bar 201 is a rectangular hollow structure with a length of 50mm, a width of 40mm, a height of 30mm, and a thickness of 6mm. The fastening bolts 202 are M12 bolt assemblies. The adjusting track 204 is an elliptical metal strip with a width of 40mm and a thickness of 6mm, and has four symmetrical elongated openings with a length of 90mm and a width of 12mm. The adjusting sliders 203 are two soft metal cuboids with dimensions of 40mm × 25mm × 15mm and a 12mm diameter through hole in the middle, which can slide symmetrically along the elongated openings of the adjusting track 204. When the distance between the two sliders is the smallest, the support stiffness is the largest and the natural frequency is the highest; when the distance is the largest, the stiffness is the smallest and the natural frequency is the lowest, achieving stepless adjustment.

[0021] Mounting support assembly 300 includes a second square steel 301 and a mounting plate 302; the second square steel 301 is a rectangular hollow structure with a length of 50mm, a width of 40mm, a height of 75mm, and a thickness of 6mm; the mounting plate 302 is a rectangular flat plate with dimensions of 75mm×55mm×10mm, chamfered corners, welded to the second square steel 301, and welded and fixed to the external base.

[0022] The assembly method of this embodiment: S1 uses a metal rubber part 104 to cast a screw connecting the lower retaining ring 103 and two sets of retaining ring fasteners 102. The screw is pre-assembled with nuts and flat washers. The upper retaining ring 101 and the lower retaining ring 103 are locked with the retaining ring fasteners 102 to complete the assembly of the pipeline installation assembly 100. S2 Weld the first square steel 201 to the adjusting rail 204, and use two sets of M12 fastening bolts 202 to connect the adjusting rail 204 to the two adjusting sliders 203 to complete the assembly of the inherent frequency adjustment component 200. S3 welds the second square steel 301 to the mounting plate 302 to complete the fabrication of the mounting support assembly 300; S4 welds the first square steel 201 to the metal rubber part 104, and welds the second square steel 301 to the lower side of the adjusting rail 204 to complete the overall assembly of the support and hanger.

[0023] Tests have shown that the natural frequency of the metal support bracket in this embodiment is adjustable from 8Hz to 35Hz, making it suitable for various ship pipeline vibration isolation conditions.

[0024] The above description is only a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention; any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A metal support bracket with infinitely adjustable inherent frequency, characterized in that, Includes piping installation components, inherent frequency regulation components, and installation support components; The pipe installation assembly is used to mount and secure the pipes; The inherent frequency adjustment component is connected to the pipeline installation component and is used to achieve stepless adjustment of the inherent frequency of the support and hanger by continuously changing the structural stiffness. The mounting support assembly is connected to the inherent frequency adjustment assembly and is used to fix the support bracket to the external base; The pipeline installation assembly, the inherent frequency adjustment assembly, and the installation support assembly are all made of metal.

2. The metal support bracket with infinitely adjustable natural frequency according to claim 1, characterized in that, The pipeline installation assembly includes an upper retaining ring, a lower retaining ring, retaining ring fasteners, and metal and rubber components; Both the upper and lower retaining rings are semi-circular metal strips with connecting structures with openings at both ends. The retaining ring fastener passes through the opening to securely connect the upper retaining ring and the lower retaining ring; The metal-rubber component is formed by casting, which fixes the lower retaining ring to the screw portion of the retaining ring fastener.

3. The metal support bracket with infinitely adjustable natural frequency according to claim 1 or 2, characterized in that, The inherent frequency adjustment assembly includes a first square steel, an adjustment rail, an adjustment slider, and fastening bolts; The first square steel is a rectangular hollow structure and is fixedly connected to the pipeline installation assembly; The adjustment track is a slat structure with at least two elongated openings. The number of the adjusting sliders is at least two, each adjusting slider has a through hole in the middle and is installed in the elongated opening of the adjusting track by the fastening bolt, so that the adjusting slider can slide along the elongated opening; By changing the distance between the two adjusting sliders on the adjusting track, the effective support length of the adjusting track can be continuously changed, thereby achieving stepless adjustment of the stiffness and natural frequency of the support.

4. The metal support bracket with infinitely adjustable natural frequency according to claim 3, characterized in that, The adjustment track is an elliptical metal strip, and the elongated openings are arranged symmetrically up, down, left, and right on the adjustment track.

5. The metal support bracket with infinitely adjustable natural frequency according to claim 4, characterized in that, The adjusting slider is a cuboid made of soft metal.

6. The metal support bracket with infinitely adjustable natural frequency according to claim 3, characterized in that, The mounting support assembly includes a second square steel and a mounting pad; The second square steel is a rectangular hollow structure and is fixedly connected to the adjusting track; The mounting pad is a flat plate structure, which is fixedly connected to the second square steel and used for welding and fixing to the external base.

7. The metal support bracket with infinitely adjustable natural frequency according to claim 6, characterized in that, The four corners of the mounting pad are chamfered.

8. The metal support bracket with infinitely adjustable natural frequency according to claim 2, characterized in that, The retaining ring fastener includes a screw, a nut, a flat washer, and a spring washer.

9. The metal support bracket with infinitely adjustable inherent frequency according to claim 3, characterized in that, The first square steel is welded and fixed to the metal rubber component; the second square steel is welded and fixed to the lower side of the adjusting track.

10. The metal support bracket with infinitely adjustable natural frequency according to any one of claims 1-9, characterized in that, The natural frequency of the metal support can be continuously varied between 8Hz and 35Hz by adjustment.

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