Control structure for the damping of the outlet duct of a roots blower
By installing a multi-layered buffer structure consisting of pipe clamps, I-beam supports, and damping spring shock absorbers on the outlet pipe of the Roots blower, the problem of rapid propagation of vibration energy was solved, thereby reducing equipment damage and noise pollution.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- KUNSHAN EASY OXYGEN AIR SEPARATION TECH CO LTD
- Filing Date
- 2025-07-04
- Publication Date
- 2026-07-14
AI Technical Summary
The outlet pipe of the Roots blower is directly connected to the equipment and building structure through a rigid support, which causes the vibration energy to spread rapidly, resulting in equipment damage and noise pollution, and even causing resonance in the building structure.
The damping mechanism, which uses pipe clamps, I-beam supports, and damping spring shock absorbers, combined with rubber pads and metal expansion joints, forms a multi-layer buffer structure to absorb and block the transmission of vibration energy.
It effectively reduces vibration transmission, lowers the risk of equipment damage and noise pollution, and avoids building structure resonance.
Smart Images
Figure CN224497936U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of vibration reduction technology for Roots blower outlets, and in particular to a control structure for vibration reduction of the outlet pipeline of a Roots blower. Background Technology
[0002] The outlet pipe of a Roots blower is directly connected to the equipment and building structure via rigid components such as supports and flanges, allowing vibration energy to propagate rapidly through solid paths. The rigid supports provide a direct connection to the pipes and building structure, failing to buffer vibration energy.
[0003] When pipes or equipment vibrate, rigid supports will directly transmit the vibration to the entire support system, and may even cause resonance in the building structure, exacerbating equipment damage and noise pollution. Utility Model Content
[0004] The purpose of this utility model is to provide a control structure for vibration reduction of the outlet pipe of a Roots blower, which solves the problem that when the pipe or equipment vibrates, the rigid support will directly transmit the vibration to the entire support system, and may even cause resonance of the building structure, exacerbating equipment damage and noise pollution.
[0005] To achieve the above objectives, this utility model provides a control structure for vibration damping of the outlet pipe of a Roots blower, including a blower, a pipe, and a vibration damping mechanism. The pipe is disposed on one side of the blower, and the vibration damping mechanism is disposed below the pipe. The vibration damping mechanism includes a pipe clamp, an I-beam support, and a damping spring damper. The pipe clamp covers the surface of the pipe, the I-beam support is fixedly connected to the pipe clamp and located below the pipe, and the damping spring damper is fixedly connected to the I-beam support and located below the I-beam support.
[0006] The damping mechanism also includes an iron plate, which is fixedly connected to the damping spring damper and located below the damping spring damper.
[0007] The vibration damping control structure of the Roots blower outlet pipe also includes a rubber pad, which covers the surface of the pipe and is located between the pipe and the pipe clamp.
[0008] The vibration damping control structure of the Roots blower outlet pipe also includes a metal expansion joint. One end of the metal expansion joint is fixedly connected to the blower, and the other end of the metal expansion joint is fixedly connected to the pipe and is located between the blower and the pipe.
[0009] This utility model discloses a control structure for vibration damping of a Roots blower outlet pipe. The pipe is located on one side of the blower, the vibration damping mechanism is located below the pipe, a pipe clamp covers the surface of the pipe, an I-beam support is fixedly connected to the pipe clamp and located below the pipe, and a damping spring damper is fixedly connected to the I-beam support and located below the I-beam support. When the pipe shakes, the I-beam support supports the pipe from below, and the spring damper reduces the vibration of the pipe. Attached Figure Description
[0010] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0011] Figure 1 This is a schematic diagram of the control structure for vibration reduction in the outlet pipe of a Roots blower according to this utility model.
[0012] 1-Fan, 2-Pipe, 3-Pipe clamp, 4-I-beam support, 5-Damping spring shock absorber, 6-Iron plate, 7-Rubber pad, 8-Metal expansion joint. Detailed Implementation
[0013] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.
[0014] Please see Figure 1 This utility model provides a control structure for vibration damping of the outlet pipe of a Roots blower, including a blower 1, a pipe 2, and a vibration damping mechanism. The pipe 2 is located on one side of the blower 1, and the vibration damping mechanism is located below the pipe 2. The vibration damping mechanism includes a pipe clamp 3, an I-beam support 4, and a damping spring damper 5. The pipe clamp 3 covers the surface of the pipe 2. The I-beam support 4 is fixedly connected to the pipe clamp 3 and located below the pipe 2. The damping spring damper 5 is fixedly connected to the I-beam support 4 and located below the I-beam support 4.
[0015] In this embodiment, when the pipe 2 shakes, the I-beam support 4 supports the pipe 2 from below, and the spring damper reduces the vibration of the pipe 2.
[0016] Furthermore, the shock absorption mechanism also includes an iron plate 6, which is fixedly connected to the damping spring shock absorber 5 and located below the damping spring shock absorber 5.
[0017] In this embodiment, the iron plate 6 increases the contact area between the damping spring shock absorber 5 and the ground, thereby improving the stability of the damping spring shock absorber 5.
[0018] Furthermore, the vibration damping control structure of the Roots blower outlet pipe also includes a rubber pad 7, which covers the surface of the pipe 2 and is located on the pipe 2. The pipe 2 is fixed by the rubber pad 7 and the pipe clamp 3 to form a "flexible-rigid" double-layer buffer, reducing the vibration transmission efficiency.
[0019] Furthermore, the vibration damping control structure of the Roots blower outlet pipe also includes a metal expansion joint 8, one end of which is fixedly connected to the blower 1, and the other end of which is fixedly connected to the pipe 2 and located between the blower 1 and the pipe 2.
[0020] In this embodiment, the metal expansion joint 8 utilizes the elastic deformation of the corrugated structure to absorb the thermal expansion and contraction and vibration displacement of the pipe 2, blocking the rigid transmission path. The metal material of the metal expansion joint 8 has high rigidity, which can effectively absorb mechanical vibration and reduce the risk of resonance of the pipe 2.
[0021] This utility model also provides load calculation and selection parameters for the aforementioned metal expansion joint and shock absorber:
[0022] 1. Calculation and selection of metal expansion joints:
[0023] (1) Calculation of thermal displacement of pipeline
[0024] Axial thermal displacement: ΔL = α × L × ΔT where:
[0025] α is the coefficient of linear expansion of the pipe material (steel: °C);
[0026] L is the calculated length of the pipe (m);
[0027] ΔT is the temperature change (°C, taken as the difference between the operating temperature and the installation temperature, usually calculated as 30~50°C).
[0028] Vibration displacement: The vibration displacement at the outlet of the Roots blower needs to be measured or the data provided by the manufacturer, and is usually taken as 1~3mm (peak-to-peak value).
[0029] (2) Expansion joint compensation amount verification
[0030] Total axial displacement: Δ = ΔL + Δvibration + Δinstallation error (installation error is reserved at 2~3mm).
[0031] When selecting a model, ensure that the rated axial compensation of the expansion joint is ≥ Δ.
[0032] (3) Stress calculation
[0033] Axial force generated by internal pressure: Fp = P × Ae where:
[0034] P is the working pressure (Pa);
[0035] Ae is the effective area of the expansion joint (m2, provided by the manufacturer).
[0036] 2. Bracket Design
[0037] (1) Fixed support: It needs to withstand the internal pressure thrust Fp and elastic reaction force Fk of the expansion joint (Fk=k×Δ, k is the stiffness of the expansion joint, provided by the manufacturer).
[0038] (2) Guide supports: ensure the correct displacement direction, and the spacing is generally 10 to 15 times the pipe diameter.
[0039] 3. Shock absorber design
[0040] (1) Rated load Fn of a single shock absorber
[0041] Equipment category:
[0042] Formula: Fn = (Total equipment weight + Additional pipeline weight) / Number of shock absorbers * 1.2
[0043] illustrate:
[0044] Safety factor range: typically 1.2-1.5, adjusted according to equipment vibration environment and reliability requirements. The safety factor is used to compensate for uncertainties such as dynamic loads and installation errors.
[0045] Key parameters:
[0046] Total equipment weight: The static weight of the equipment itself (such as machines, units, etc.).
[0047] Additional weight of pipes: The weight of pipes, valves, and other components connected to the equipment.
[0048] Number of shock absorbers: The total number of shock absorbers installed at the bottom of the equipment must be evenly distributed to ensure force balance.
[0049] Pipes:
[0050] Formula: Fn = (Weight of pipe section + Weight of medium + Weight of insulation layer) / Number of shock absorbers * 1.3
[0051] illustrate:
[0052] Dynamic load factor: directly take 1.3, to take into account the influence of dynamic factors such as medium flow and vibration in the pipeline on the load.
[0053] Key parameters:
[0054] Pipeline section weight: The weight of the pipeline section itself (including flanges, supports, and other accessories).
[0055] Medium weight: The weight of the medium (such as water, gas, liquid, etc.) transported in the pipeline needs to be calculated based on the medium density and the pipeline volume.
[0056] Insulation layer weight: The weight of the pipe insulation material (such as rock wool, polyurethane, etc.).
[0057] (2) Stiffness k and natural frequency f_0
[0058] Spring stiffness (g=9.8m / s², δ is the rated compression of the spring, usually taken as 20-50mm);
[0059] Natural frequency: (m represents the load-bearing capacity of a single shock absorber, in kg);
[0060] Design requirements: The main vibration frequency (fe) of the equipment must meet the following requirements. (Avoid resonance);
[0061] 3. Selection Example (Vibration Damping for Roots Blower Base)
[0062] Equipment parameters: Fan weight 800kg, speed 980r / min (main vibration frequency) (1.63Hz), equipped with 4 shock absorbers.
[0063] Calculation process: (Single rated load) Take the spring compression δ = 30mm. Then the natural frequency (Satisfying f_e / f_0 = 5 > 1.4, far from resonance);
[0064] Selection result: Low-frequency spring shock absorber, model SD-2500, stainless steel material, with built-in rubber damping pad (damping ratio 0.1).
[0065] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Those skilled in the art can understand that implementing all or part of the above-described embodiments and making equivalent changes in accordance with the claims of the present utility model are still within the scope of the utility model.
Claims
1. A control structure for vibration damping of the outlet pipe of a Roots blower, comprising a blower, characterized in that, It also includes pipes and a shock-absorbing mechanism, wherein the pipes are located on one side of the fan and the shock-absorbing mechanism is located below the pipes; The vibration damping mechanism includes a pipe clamp, an I-beam support, and a damping spring damper. The pipe clamp covers the surface of the pipe, the I-beam support is fixedly connected to the pipe clamp and located below the pipe, and the damping spring damper is fixedly connected to the I-beam support and located below the I-beam support.
2. The control structure for vibration damping of the Roots blower outlet pipe as described in claim 1, characterized in that, The damping mechanism also includes an iron plate, which is fixedly connected to the damping spring damper and located below the damping spring damper.
3. The control structure for vibration damping of the Roots blower outlet pipe as described in claim 2, characterized in that, The vibration damping control structure of the Roots blower outlet pipe also includes a rubber pad, which covers the surface of the pipe and is located between the pipe and the pipe clamp.
4. The control structure for vibration damping of the Roots blower outlet pipe as described in claim 3, characterized in that, The vibration damping control structure of the Roots blower outlet pipe also includes a metal expansion joint, one end of which is fixedly connected to the blower, and the other end of which is fixedly connected to the pipe and located between the blower and the pipe.