Vibration isolation system with back pressing devices

Abstract

The invention relates to a vibration isolation system with back pressing devices, and belongs to the technical field of vibration reduction of civil engineering structures. The vibration isolation system is used for controlling influences of vibration of machinery equipment on external environments or relieving influences of vibration of the external environments on the machinery equipment. The vibration isolation system comprises a counterweight bench and vibration isolators, the vibration isolators are located between a base and the counterweight bench which is supported on the vibration isolators, elastic supporting elements are arranged in the vibration isolators, and the elastic supporting elements are at least composed of metal helical springs; and the vibration isolation system further comprises the back pressing devices, each back pressing device comprises a back pressing elastic element and a connecting part, one end of each back pressing elastic element acts on the counterweight bench, the other end of each back pressing elastic element acts on the corresponding connecting part, the connecting parts is connected with the base or vibration isolator bases, and the direction of acting force of the back pressing elastic elements on the counterweight bench is opposite to that of supporting force of the elastic supporting elements on the counterweight bench. Compared with the prior art, according to the vibration isolation system with the back pressing devices, the inherent frequency is easy to control, and the vibration isolation effect is better guaranteed.

Description

technical field

[0001] The invention belongs to the technical field of vibration reduction of civil engineering structures, and in particular relates to a vibration isolation system for controlling the impact of the vibration of machine equipment on the external environment or reducing the impact of the vibration of the external environment on the machine equipment. Background technique

[0002] In recent years, with the continuous advancement of my country's industrial upgrading, various large-scale rotary equipment are widely used in industrial production and urban construction, such as various generator sets, water pumps, fans, compressors, etc. The problem of vibration and noise control has also been paid more and more attention. Taking the mechanical cooling fan system of an urban gas-fired power plant as an example, the excitation frequency of its motor, gearbox, and blades is very rich. The vibration attenuation in the building structure is small, and it is easy to exc...

Examples

Embodiment 1

[0028] Such as figure 1 , figure 2 The shown vibration isolation system of the present invention with a back pressure device includes a counterweight stand 1 and a vibration isolator, the counterweight stand 1 is a platen made of reinforced concrete, and the vibration isolator is elastic The spring-damping vibration isolator composed of the supporting element 2 and the damping device 3, wherein the elastic supporting element 2 includes four helical steel springs, the damping device 3 is specifically a viscous damping device, and the vibration isolator is located between the base 7 and the counterweight platform 1, the counterweight platform 1 is supported on the vibration isolator; in addition, it also includes a back pressure device, the back pressure device includes a back pressure elastic element 4 and a connecting piece 5, wherein the back pressure elastic element 4 is a metal tension spring , the connecting piece 5 is an ear plate with a hooking hole, the connecting pie...

Embodiment 2

[0033] Such as image 3 The difference between the vibration isolation system with the back pressure device of the present invention and the first embodiment is that the vibration isolator is only a spring vibration isolation device composed of elastic support elements 2, and the elastic support elements 2 are specifically four spiral steel Spring; In addition, in the back pressure device of this example, connector 5 is the detaining connector with connecting flange 13, and this detaining connecting part is welded by channel steel, utilizes fastener 15 to connect flange 13 and base The metal anchors 14 pre-buried in 7 are fixed together to realize the fixing of the connecting piece 5 on the base 7; in addition, the back pressure elastic element is composed of a pressure equalizing plate 9, two compression springs 30 and a damping device 8, in which The pressing plate is made of steel plate, the compression spring 30 is a helical steel spring, and the damping device 8 is specif...

Embodiment 3

[0036] Such as Figure 4 The vibration isolation system with back pressure device of the present invention shown in the present invention differs from Embodiment 2 in that bosses 31 are provided on both sides of counterweight platform 1; The spring damping and vibration isolation device composed of the damping device 3, the elastic support element 2 is specifically a helical steel spring, and the damping device 3 is specifically a viscous damping device; in the back pressure device, the connecting piece 5 is made of I-beam, and the connecting piece 5 The lower end of the lower end is fixed on the base 7, and the anti-pressure elastic element 4 is a compression spring composed of a helical steel spring. One end of the back pressure elastic element 4 acts on the connecting piece 5 , and the other end of the back pressure acts on the boss 31 in the counterweight platform 1 . In order to prevent the anti-pressure elastic element 4 from accidentally moving during use, the connecti...

technical field

[0001] The invention belongs to the technical field of vibration reduction of civil engineering structures, and in particular relates to a vibration isolation system for controlling the impact of the vibration of machine equipment on the external environment or reducing the impact of the vibration of the external environment on the machine equipment. Background technique

[0002] In recent years, with the continuous advancement of my country's industrial upgrading, various large-scale rotary equipment are widely used in industrial production and urban construction, such as various generator sets, water pumps, fans, compressors, etc. The problem of vibration and noise control has also been paid more and more attention. Taking the mechanical cooling fan system of an urban gas-fired power plant as an example, the excitation frequency of its motor, gearbox, and blades is very rich. The vibration attenuation in the building structure is small, and it is easy to exc...

Examples

Embodiment 1

[0028] Such as figure 1 , figure 2 The shown vibration isolation system of the present invention with a back pressure device includes a counterweight stand 1 and a vibration isolator, the counterweight stand 1 is a platen made of reinforced concrete, and the vibration isolator is elastic The spring-damping vibration isolator composed of the supporting element 2 and the damping device 3, wherein the elastic supporting element 2 includes four helical steel springs, the damping device 3 is specifically a viscous damping device, and the vibration isolator is located between the base 7 and the counterweight platform 1, the counterweight platform 1 is supported on the vibration isolator; in addition, it also includes a back pressure device, the back pressure device includes a back pressure elastic element 4 and a connecting piece 5, wherein the back pressure elastic element 4 is a metal tension spring , the connecting piece 5 is an ear plate with a hooking hole, the connecting pie...

Embodiment 2

[0033] Such as image 3 The difference between the vibration isolation system with the back pressure device of the present invention and the first embodiment is that the vibration isolator is only a spring vibration isolation device composed of elastic support elements 2, and the elastic support elements 2 are specifically four spiral steel Spring; In addition, in the back pressure device of this example, connector 5 is the detaining connector with connecting flange 13, and this detaining connecting part is welded by channel steel, utilizes fastener 15 to connect flange 13 and base The metal anchors 14 pre-buried in 7 are fixed together to realize the fixing of the connecting piece 5 on the base 7; in addition, the back pressure elastic element is composed of a pressure equalizing plate 9, two compression springs 30 and a damping device 8, in which The pressing plate is made of steel plate, the compression spring 30 is a helical steel spring, and the damping device 8 is specif...

Embodiment 3

[0036] Such as Figure 4 The vibration isolation system with back pressure device of the present invention shown in the present invention differs from Embodiment 2 in that bosses 31 are provided on both sides of counterweight platform 1; The spring damping and vibration isolation device composed of the damping device 3, the elastic support element 2 is specifically a helical steel spring, and the damping device 3 is specifically a viscous damping device; in the back pressure device, the connecting piece 5 is made of I-beam, and the connecting piece 5 The lower end of the lower end is fixed on the base 7, and the anti-pressure elastic element 4 is a compression spring composed of a helical steel spring. One end of the back pressure elastic element 4 acts on the connecting piece 5 , and the other end of the back pressure acts on the boss 31 in the counterweight platform 1 . In order to prevent the anti-pressure elastic element 4 from accidentally moving during use, the connecti...

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