JP2012149678A - Vibration damping device of rotary machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration damping device capable of preventing the propagation of vibration of a rotary machine to a structure on which the rotary machine is installed, facilitating a centering operation of the rotary machine, and even if the rotary machine is rocked large due to an earthquake or the like, preventing the rotary machine from falling down.SOLUTION: The vibration damping device is constituted of a plurality of vibration damping units 31. Each vibration damping unit 31 comprises a base stand 34 fixed to the structure 6, a mount member 40 fixed to the rotary machine 2, a vibration damping pad 50 arranged between the base stand 34 and the mount member 40 and a connection member 60 which connects the base stand 34 and the rotary machine 2. The connection member 60 includes jack mechanisms 62, 64a, 64b which lift the rotary machine 2 and an upper limit stopper 63 and a lower limit stopper 64 which limit movement in the vertical direction of the rotary machine 2.

Description

  The present invention relates to a vibration isolator installed between a rotary machine such as a pump assembly and a structure on which the rotary machine is installed, and in particular, prevents propagation of vibration from the rotary machine that is a vibration source to the structure. However, the present invention relates to a vibration isolator that improves the reliability of operation of the rotating machine.

  A rotating machine, such as a pump assembly, generates vibrations during its operation. In order to prevent the propagation of vibration to the structure on which the rotating machine is installed, a vibration isolator is installed between the rotating machine and the structure. This vibration isolator is basically composed of an elastic material such as rubber, and absorbs vibrations of the rotating machine by the elasticity of the elastic material. However, the conventional vibration isolator has the following problems.

  First, when the rotating machine is placed on the vibration isolator, the elastic material of the vibration isolator is deformed, so that the centering operation of the rotating machine becomes difficult. In most cases, the center of gravity of a rotating machine is at a position shifted from the center thereof. When such a rotary machine is placed on the vibration isolator, the rotary shaft of the rotary machine is inclined, and as a result, the centering operation of the rotary machine becomes difficult. For example, in a pump assembly in which the drive machine and the pump are connected by a rotating shaft, if the drive machine is tilted on the vibration isolator, the alignment operation between the drive machine and the pump becomes difficult, which is the worst case. If it is installed in a state where the alignment accuracy is poor, there is a risk that vibration will increase and a failure of the rotating machine may occur.

  Secondly, since the rotating machine is flexibly connected to the structure via a vibration isolator, vibration propagation to the structure is prevented, but vibration of the rotating machine itself is increased. Such vibration of the rotating machine itself is a phenomenon in which the entire rotating machine is shaken, and it is difficult to appropriately detect this vibration with a vibration detector of the rotating machine. For this reason, the abnormal vibration of the rotating machine is detected to stop the rotating machine and avoid a failure, resulting in poor reliability.

  Third, when the rotating machine and the structure are greatly shaken due to an earthquake or the like, a tipping moment is generated in the rotating machine. As described above, the rotating machine is flexibly connected to the structure via the vibration isolator, and therefore, when an earthquake or the like occurs, the entire rotating machine may be greatly tilted and fall down.

JP 2003-269530 A

  The present invention was made to solve the above-described conventional problems, and prevents propagation of vibrations of the rotating machine to the structure on which the rotating machine is installed, and facilitates the centering operation of the rotating machine, An anti-vibration device that enables installation and installation of rotating machinery with high accuracy, suppresses vibrations of the rotating machinery itself, and prevents the rotating machinery from tipping over even if the rotating machinery shakes greatly due to an earthquake or the like. The purpose is to provide.

  In order to achieve the above-described object, one aspect of the present invention is a vibration isolating apparatus installed between a rotating machine and a structure, and the vibration isolating apparatus includes a plurality of vibration isolating units. Each of the plurality of vibration isolation units includes a base fixed to the structure, a mount member fixed to the rotating machine, and a vibration isolation pad disposed between the base and the mount member. And a connecting member that connects the base and the rotating machine, the connecting member includes a jack mechanism that lifts the rotating machine, and an upper limit stopper and a lower limit stopper that limit the vertical movement of the rotating machine. It is characterized by having.

In a preferred aspect of the present invention, the connecting member has a bolt fixed to the base, the upper limit stopper and the lower limit stopper are nuts engaged with the bolt, and the jack mechanism is It comprises a bolt and the lower limit stopper.
In a preferred aspect of the present invention, the vibration-proof pad is detachably fixed to the mount member and the base.
The preferable aspect of this invention is further equipped with the vibration detector which detects the abnormal vibration of the said rotary machine, The said vibration detector detects the contact of the contact element arrange | positioned so as to oppose each other, and the said contact elements. A contact detector, wherein the contact element is disposed on at least one of the upper limit stopper and the lower limit stopper and the rotating machine.

  Another aspect of the present invention is a pump facility comprising the vibration isolator installed on a structure and a pump assembly installed on the vibration isolator.

  According to the present invention, the level of the rotating machine can be adjusted by the jack mechanism of each vibration isolation unit, the installation position of the rotating machine can be determined, and a stable installation state can be achieved. Therefore, the centering operation of the rotating machine can be facilitated when the rotating machine is installed. In addition, after the centering operation is completed, the rotary machine is supported by the vibration isolation pad during operation of the rotary machine by disengaging the rotary machine from the jack mechanism. Therefore, propagation of vibration from the rotating machine to the structure can be prevented. Furthermore, even if the rotating machine is greatly shaken due to an earthquake or the like, the upper and lower stoppers of the connecting members restrict the vertical movement of the rotating machine, so that the rotating machine can be prevented from overturning.

It is a schematic diagram which shows a pump assembly. It is the figure which looked at the anti-vibration unit shown in FIG. 1 from the direction shown by arrow I. It is the sectional view on the AA line of FIG. 4A is a view showing the mount member shown in FIG. 2, FIG. 4B is a view showing the mount member shown in FIG. 3, and FIG. 4C is a view showing B of FIG. FIG. It is a figure which shows the vibration isolating pad shown in FIG. It is a figure which shows the example which provided the roll stopper in the pump assembly. It is a figure which shows the example which provided the roll stopper in the pump assembly. It is a figure which shows the example which has arrange | positioned the shim between the vibration isolator unit and the installation floor. It is a figure which shows the example of the vibration unit provided with the vibration detector which detects the abnormal vibration of a pump assembly. FIG. 10 is an enlarged view of the first contact element shown in FIG. 9.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic view showing a pump assembly. As shown in FIG. 1, this pump assembly is a so-called vertical shaft pump. The pump assembly includes a pump 1, a speed reducer 2 connected to the pump 1, and a drive machine 3 connected to the speed reducer 2. The pump 1 is driven by a drive unit 3 via a speed reducer 2. The pump assembly is mounted on the structure. More specifically, the pump 1 is installed on the pump floor 5a of the suction water tank 5 that is a part of the structure, and the speed reducer 2 and the drive unit 3 are installed on the installation floor 6 that is another part of the structure. is set up.

  The pump 1 includes a guide casing 11 having a suction bell mouth 11 a and a discharge bowl 11 b, a suspension pipe 13 for suspending the guide casing 11 in the suction water tank 5, and a discharge bent pipe 14 connected to the upper end of the suspension pipe 13. And an impeller 20 accommodated in the guide casing 11 and a rotating shaft 16 to which the impeller 20 is fixed.

  The suspension pipe 13 extends downward through an insertion hole 5 b formed in the pump floor 5 a of the suction water tank 5, and is fixed to the pump floor 5 a via a pump base 9 provided at the upper end of the suspension pipe 13. Yes. The rotating shaft (vertical shaft) 16 extends in the vertical direction through the discharge curved tube 14 and the suspension tube 13, and the lower end thereof is located in the guide casing 11. A pump casing 12 is configured by the guide casing 11 and the suspension pipe 13.

  As shown in FIG. 1, the suction bell mouth 11a is opened downward, and the upper end of the suction bell mouth 11a is fixed to the lower end of the discharge bowl 11b. The impeller 20 is fixed to the lower part of the rotating shaft 16, and the impeller 20 and the rotating shaft 16 rotate integrally. The impeller 20 has a plurality of blades, and a plurality of guide vanes 22 are disposed above (discharge side) the impeller 20. These guide vanes 22 are fixed to the inner peripheral surface of the guide casing 11 and the outer peripheral surface of the bowl bush 21.

  The rotating shaft 16 is rotatably supported by underwater bearings 25 and 26, an intermediate bearing 27, and an outer bearing 28. The underwater bearing 25 is located below the impeller 20 and supports the lower end of the rotating shaft 16. The underwater bearing 26 is accommodated in the bowl bush 21 and supports the lower portion of the rotating shaft 16. The outer bearing 28 is provided on the upper portion of the discharge curved pipe 14 and supports the upper portion of the rotating shaft 16. The intermediate bearing 27 is disposed between the outer bearing 28 and the underwater bearing 26. That is, the intermediate bearing 27 is accommodated in the suspension pipe 13 and supports the intermediate portion of the rotating shaft 16. The underwater bearings 25 and 26 and the intermediate bearing 27 are so-called sliding bearings that are in sliding contact with the rotating shaft 16.

  As shown in FIG. 1, the rotating shaft 16 protrudes upward from the discharge curved pipe 14. The upper end of the rotary shaft 16 is connected to the drive shaft of the speed reducer 2. Furthermore, the speed reducer 2 is connected to the drive machine 3. As the drive machine 3, a diesel engine, a gas turbine, a motor, etc. can be used. Note that the pump 1 may be directly connected to the drive unit 3 without using the speed reducer 2.

  When the impeller 20 is rotated by the driving machine 3 via the rotary shaft 16, the water (handling liquid) in the suction water tank 5 is sucked from the suction bell mouth 11a, and the discharge bowl 11b, the suspension pipe 13, and the discharge curved pipe 14 are sucked. And is transferred to the discharge pipe 30.

  As shown in FIG. 1, the speed reducer 2 is placed on a vibration isolating apparatus composed of a plurality of vibration isolating units 31. These anti-vibration units 31 are installed on the installation floor 6 which is a part of the structure. The reduction gear 2 and the installation floor 6 are connected via these vibration isolation units 31. Each anti-vibration unit 31 has the same structure and is configured to load the speed reducer 2 by a plurality of anti-vibration units 31, so that the anti-vibration unit 31 is placed at an appropriate arbitrary position according to the speed reducer 2 to be loaded. It is possible to install. That is, the installation position of each image stabilization unit 31 can be adjusted so that the load applied to each image stabilization unit 31 is uniform. Thus, since the vibration isolator is composed of a plurality of vibration isolation units 31, it can be used for various rotating machines having different centers of gravity.

  Next, the vibration isolator will be described. As described above, since each image stabilization unit 31 has the same structure, one of these image stabilization units 31 will be described in detail. 2 is a view of the image stabilization unit 31 shown in FIG. 1 as viewed from the direction indicated by the arrow I, and FIG. 3 is a cross-sectional view taken along line AA of FIG. The vibration isolation unit 31 includes a sole plate (base) 34 fixed to the installation floor 6 that is a part of the structure, a mount member 40 fixed to the speed reducer 2 of the pump assembly, and the sole plate 34 and the mount. The vibration-proof pad 50 arrange | positioned between the members 40 and the connection member 60 which connects the soleplate 34 and the reduction gear 2 are provided. The sole plate 34 is fixed to the installation floor 6 with bolts 36. The mount member 40 is fixed to the mount 2 a of the speed reducer 2 with bolts 37.

  4A is a view showing the mount member 40 shown in FIG. 2, FIG. 4B is a view showing the mount member 40 shown in FIG. 3, and FIG. 4C is a view showing FIG. It is a BB sectional view taken on the line. The mount member 40 includes an upper horizontal plate 41 and a lower horizontal plate 42 arranged in parallel to each other, and two vertical plates 43 and 43 that connect the upper horizontal plate 41 and the lower horizontal plate 42. The two vertical plates 43 and 43 are disposed between the upper horizontal plate 41 and the lower horizontal plate 42, and a space S is formed between the upper horizontal plate 41 and the lower horizontal plate 42. The lower horizontal plate 42 is formed with a notch 42a extending outward from the center thereof. As shown in FIG. 2, the upper horizontal plate 41 is fixed to the mount 2 a of the speed reducer 2 with the bolts 37.

  FIG. 5 is a view showing the vibration isolating pad 50 shown in FIG. As shown in FIG. 5, the anti-vibration pad 50 includes an elastic body 51 that absorbs vibration, a top plate 52 fixed to the upper surface of the elastic body 51, and a bottom plate 53 fixed to the lower surface of the elastic body 51. The bolt 54 extends upward from the top plate 52, and the nut 55 engages with the bolt 54. As the elastic body 51, a material having a vibration absorbing property such as rubber is used. The anti-vibration pad 50 to be used is selected based on the size and vibration characteristics of the rotating machine to be supported.

  As shown in FIG. 2, the bolt 54 of the vibration isolation pad 50 is inserted into the notch 42 a of the lower horizontal plate 42, and the vibration isolation pad 50 is fixed to the mount member 40 by tightening the nut 55 in this state. . Further, the bottom plate 53 of the vibration isolating pad 50 is fixed to the sole plate 34 with bolts 57. When the vibration isolating pad 50 is taken out, the nut 55 is loosened, the bolt 57 is removed, the speed reducer 2 is jacked up by a jack mechanism, which will be described later, and then the vibration isolating pad 50 is pulled out horizontally along the notch 42a.

  The connecting member 60 includes a bolt 62 fixed to the sole plate 34, and an upper limit stopper 63 and a lower limit stopper 64 that limit the vertical movement of the mount 2 a of the speed reducer 2. The upper limit stopper 63 includes two nuts 63 a and 63 b that engage with the bolt 62. Similarly, the lower limit stopper 64 includes two nuts 64 a and 64 b that engage with the bolt 62. As described above, since the upper limit stopper 63 and the lower limit stopper 64 are each constituted by a plurality of nuts, the positions of the stoppers 63 and 64 can be reliably fixed to arbitrary positions by the double nut effect. The upper part of the bolt 62 is inserted into a hole 2 b formed in the mount 2 a of the speed reducer 2. The diameter of the hole 2 b is larger than the diameter of the bolt 62, and the gantry 2 a is movable in the vertical direction with respect to the bolt 62. In the example shown in FIG. 2, two connecting members 60 are provided, but three or more connecting members 60 may be provided.

  The upper limit stopper 63 is disposed above the gantry 2a, and the lower limit stopper 64 is disposed below the gantry 2a. A vertical gap F1 is formed between the upper limit stopper 63 and the gantry 2a, and similarly, a vertical gap F2 is formed between the lower limit stopper 64 and the gantry 2a. Therefore, the speed reducer 2 is substantially supported by the vibration isolation pad 50, and vibration transmission from the rotating machine (in this example, the speed reducer 2) to the structure is prevented by the vibration isolation pad 50. Even when the pump assembly and the entire structure are greatly shaken due to an earthquake or the like, the vertical swing of the mount 2a of the speed reducer 2 is limited by the upper limit stopper 63 and the lower limit stopper 64. Thus, since the pump assembly and the structure are connected not only by the vibration isolating pad 50 but also by the connecting member 60, the pump assembly can be prevented from falling down. Note that the lateral shaking of the pump assembly is limited by the contact between the connecting member 60 and the mount 2a of the speed reducer 2. However, in this configuration, since it is difficult to set and manage the allowable swing width in the lateral direction, a roll stopper described later may be provided.

  The lower limit stopper 64 including the nuts 64a and 64b and the bolt 62 engaged with the lower limit stopper 64 also function as a jack mechanism for lifting the pump assembly. That is, the gantry 2a of the speed reducer 2 can be lifted by rotating the nuts 64a and 64b as the lower limit stopper 64 in the upward direction. This jack mechanism (bolt 62 and nuts 64a and 64b) is used when the vibration-proof pad 50 is replaced. That is, with the nut 55 of the vibration isolating pad 50 loosened and the bolts 57 removed from the sole plate 34, the mount mechanism 40 fixed to the mount 2a and the mount 2a of the speed reducer 2 by the jack mechanism are provided. Lifted. Then, the anti-vibration pad 50 is taken out from the anti-vibration unit 31 by pulling out the anti-vibration pad 50 in the horizontal direction along the notch 42a (see FIG. 4C) of the mount member 40. If the mount member 40 can be jacked up to the upper end of the bolt 54 of the vibration isolation pad 50 by the jack mechanism, a simple hole may be provided in the lower horizontal plate 42 instead of the notch 42a.

  Since the vibration-proof pad 50 which absorbs vibration deteriorates, it is necessary to replace it according to the usage time. Conventionally, in order to replace the vibration-proof pad, it has been necessary to pull up the pump assembly with an overhead crane or the like. According to the present embodiment, since the pump assembly can be lifted by the jack mechanism (bolt 62 and nuts 64a and 64b), the vibration isolation pad 50 can be easily replaced. Thereby, the time and cost which replacement | exchange of the anti-vibration pad 50 can be reduced significantly.

  In the case of pump facilities for flood control purposes, there is usually no spare machine, so it is necessary to keep all pump facilities in operation in preparation for unexpected river increases such as sudden heavy rain. . By using this anti-vibration device, the replacement of the anti-vibration pad 50 can be completed in a very short period of time, so it is possible to minimize the drainage function deterioration period due to the replacement work, and the reliability as a pump facility Can be improved.

  The anti-vibration pad 50 is disposed between the mount member 40 and the sole plate 34. Since the upper limit stopper 63 and the lower limit stopper 64 are constituted by nuts that engage with the bolts 62, the positions of the upper limit stopper 63 and the lower limit stopper 64 are variable. Therefore, general-purpose vibration-proof pads having various heights and various elasticity can be used. The anti-vibration pad can be selected according to the type and characteristics of the rotary machine represented by the pump assembly.

  Since the anti-vibration device is composed of a plurality of anti-vibration units 31, the jack mechanism (bolts 62 and nuts 64a and 64b) of each anti-vibration unit 31 is used when the pump assembly is installed in the structure. It can also be used as a position adjusting mechanism for aligning the pump assembly. The centering operation of the pump assembly is performed as follows. First, the speed reducer 2 is placed on the mount member 40 and left as it is for a while. Next, the nuts 64a and 64b of the jack mechanism are raised until they hit the frame 2a of the speed reducer 2, and the positions of the nuts 64a and 64b are adjusted so that the frame 2a is horizontal. In this state, the pump assembly is aligned. After the centering operation is completed, the nuts 64a and 64b are lowered. Further, the positions of the nuts 63a and 63b are adjusted so that a predetermined gap F1 is formed between the nuts 63a and 63b as the upper limit stopper 63 and the mount 2a, and similarly, the nuts 64a and 64b as the lower limit stopper 64 are formed. The positions of the nuts 64a and 64b are adjusted so that a predetermined gap F2 is formed between the frame 64a and the mount 2a. As a result, the installation of the pump assembly is completed and operation is possible.

  In order to prevent the roll of the pump assembly (in this example, the roll of the speed reducer 2), as shown in FIGS. 6 and 7, a roll stopper 70 may be provided in the pump assembly. In the example shown in FIGS. 6 and 7, a roll stopper 70 is provided on the mount 2 a of the speed reducer 2. The roll stopper 70 includes a side plate 71 fixed to the mount 2 a of the speed reducer 2 by welding, and a bolt 72 fixed to the side plate 71. The bolt 72 extends toward the side surface 6 a of the installation floor 6, and a horizontal gap F <b> 3 is formed between the head of the bolt 72 and the side surface 6 a of the installation floor 6. The gap F3 can be adjusted by the relative position between the bolt 72 and the side plate 71. A plurality of bolts 72 can be used for the roll stopper 70.

  As described above, a commercially available general-purpose vibration-proof pad can be used as the vibration-proof pad 50. However, general-purpose vibration-proof pads may vary to some extent in size and quality, and the floor surface to be installed does not always have a horizontal plane with high accuracy. Therefore, in order to adjust the variation in the dimension (height) of the vibration isolation pad 50, a shim 80 may be disposed between the sole plate 34 of the vibration isolation unit 31 and the installation floor 6 as shown in FIG. preferable.

  FIG. 9 is a diagram illustrating an example of a vibration unit including a vibration detector that detects abnormal vibration of the pump assembly. As shown in FIG. 9, the vibration detector includes first contact elements 90, 90 arranged on the upper limit stopper 63 of the connecting member 60 and the mount 2 a of the speed reducer 2, and the lower limit stopper of the connecting member 60. 64 and the second contact elements 91 and 91 facing each other, the first contact detector 92 that detects the contact between the first contact elements 90 and 90, And a second contact detector 93 that detects contact between the two contact elements 91, 91.

  FIG. 10 is an enlarged view of the first contact element 90 shown in FIG. As shown in FIG. 10, the first contact element 90 includes an electrode 90a and an insulator 90b to which the electrode 90a is fixed. The first contact elements 90 and 90 are fixed to the upper limit stopper 63 and the gantry 2a so that the electrodes 90a and 90a face each other. The second contact element 91 also has the same configuration as the first contact element 90, and the second contact element 91 includes an electrode and an insulator to which the electrode is fixed. The second contact elements 91 and 91 are respectively fixed to the lower limit stopper 64 and the gantry 2a so that the electrodes face each other.

  The first contact elements 90, 90 are connected to a first contact detector 92, and the second contact elements 91, 91 are connected to a second contact detector 93. Further, the first contact detector 92 and the second contact detector 93 are connected to an alarm device 95. When the pump assembly is greatly shaken for some reason and the first contact element 90 or 90 or the second contact element 91 or 91 comes into contact with each other, the first contact detector 92 or the second contact detector 93 When the contact is detected, a signal is sent to the alarm device 95, and the alarm device 95 receives the signal and issues an alarm. Note that either the first contact element 90 or 90 or the second contact element 91 or 91 may be omitted.

  Abnormal vibrations of the pump assembly (in this example, abnormal vibrations of the speed reducer 2) are often caused by some trouble occurring in the pump assembly. Therefore, by detecting the vibration of the pump assembly exceeding the allowable range by the vibration detector, a serious failure of the pump assembly can be prevented in advance, and the reliability of the pump assembly can be improved. The allowable vibration range of the pump assembly is determined by the distance between the first contact elements 90 and 90 and the distance between the second contact elements 91 and 91, that is, the positions of the upper limit stopper 63 and the lower limit stopper 64. Since the upper limit stopper 63 and the lower limit stopper 64 are made of nuts, their positions can be easily changed. Therefore, it is possible to set an allowable range of vibration according to various rotating machines.

  In the embodiment described so far, the vibration isolator is installed between the speed reducer 2 and the structure, but the installation location of the vibration isolator is not limited to this example. The vibration isolator may be installed between the speed reducer 2 and the structure, and / or between the pump 1 and the structure, and / or between the drive machine 3 and the structure. The vibration isolator can also be used for a pump assembly having a structure in which the pump 1 and the drive unit 3 are directly connected without a reduction gear. A highly reliable pump facility can be provided by the vibration isolator installed in the structure and the pump assembly installed on the vibration isolator. In addition to the pump assembly, the vibration isolator can be applied to all types of rotating machines that can be sources of vibration, such as a blower and a generator.

  The preferred embodiments of the present invention have been described above, but the present invention is not limited to the above-described embodiments, and it goes without saying that the present invention may be implemented in various forms within the scope of the technical idea.

1 Pump 2 Reducer 3 Drive 5 Suction Water Tank (Structure)
6 Installation floor (structure)
16 Rotating shaft 20 Impeller 31 Anti-vibration unit 34 Sole plate (base)
40 mount member 50 anti-vibration pad 60 coupling member 62 bolt 63 upper limit stopper 64 lower limit stopper 70 roll stopper 90 first contact element 91 second contact element 92 first contact detector 93 second contact detector 95 alarm Machine

Claims (5)

A vibration isolator installed between the rotating machine and the structure,
The vibration isolator is composed of a plurality of vibration isolating units,
The plurality of vibration isolation units are respectively
A base fixed to the structure;
A mounting member fixed to the rotating machine;
An anti-vibration pad disposed between the base and the mount member;
A connecting member that connects the base and the rotary machine;
The vibration isolation device, wherein the connecting member includes a jack mechanism that lifts the rotating machine, and an upper limit stopper and a lower limit stopper that limit the vertical movement of the rotating machine. The connecting member has a bolt fixed to the base,
The upper limit stopper and the lower limit stopper are nuts engaged with the bolts,
The vibration isolator according to claim 1, wherein the jack mechanism includes the bolt and the lower limit stopper.   The anti-vibration device according to claim 1 or 2, wherein the anti-vibration pad is detachably fixed to the mount member and the base. A vibration detector for detecting abnormal vibration of the rotating machine;
The vibration detector includes a contact element arranged to face each other, and a contact detector that detects contact between the contact elements,
4. The vibration isolator according to claim 1, wherein the contact element is disposed in at least one of the upper limit stopper and the lower limit stopper and the rotating machine. 5. . The vibration isolator according to any one of claims 1 to 4 installed on a structure;
And a pump assembly installed on the vibration isolator.

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