JP7503914B2 - Vibration isolation device for rotating machinery, pump equipment, and adjustment method for vibration isolation device for rotating machinery - Google Patents

Description

The present invention relates to vibration isolation devices for rotating machines, pump equipment, and methods for adjusting vibration isolation devices for rotating machines.

The following Patent Document 1 discloses a vibration isolation device for rotating machinery. This vibration isolation device isolates the support frame that supports the reducer (rotating machinery) of the pump equipment. The vibration isolation device is basically composed of an elastic support part that uses an elastic material such as rubber, and absorbs vibrations of the rotating machinery by the elasticity of the elastic material.

Japanese Patent No. 5670766

However, in the above-mentioned vibration isolation device, sagging occurs in the elastic material in the vertical direction, which causes problems with installation and deterioration over time. Because sagging is a characteristic of elastic materials, the only way to fundamentally solve the problem is to periodically replace the elastic material or use a material that does not sag. When sagging occurs, the elastic support part deforms, making it difficult to align the rotating machinery placed on the vibration isolation device. For this reason, in the past, this problem was addressed by incorporating a structure that can tolerate misalignment due to sagging into, for example, a shaft coupling.

The present invention was made in consideration of the above problems, and aims to prevent deformation of the elastic support part and misalignment of the rotating machine due to settling of the elastic material while ensuring vibration-proofing performance.

A vibration isolation device for a rotating machine according to one aspect of the present invention includes a vibration isolation stand that receives a load from the rotating machine, an elastic support part that supports the vibration isolation stand, and a sliding support part that supports the vibration isolation stand, limits the amount of vertical deflection of the elastic support part to a certain amount, and is capable of sliding laterally in response to the lateral vibration of the vibration isolation stand.

The vibration isolation device for the rotating machine may be provided with a level adjustment unit that adjusts the support height of the vibration isolation stand at the sliding support unit.

The vibration isolation device for the rotating machine may include a deflection adjustment unit that adjusts the initial deflection of the elastic support in the vertical direction.

The vibration isolation device for the rotating machine may include a measuring unit that measures at least one of the load and vibration applied to at least one of the vibration isolation stand, the elastic support, and the sliding support.

The vibration isolation device for the rotating machine may include a detection unit that detects abnormalities or signs of abnormalities in the rotating machine based on the measurement results of the measurement unit.

A pump facility according to one aspect of the present invention includes the vibration isolation device described above, a rotating machine supported by the vibration isolation device, and a pump assembly connected to the rotating machine.

The pump equipment may include a rim foundation that surrounds the installation area of the vibration isolation device, and a raised portion that positions the vibration isolation device at a height equal to or higher than the rim foundation.

The pump equipment may be provided with a foundation that does not have an edge foundation surrounding the installation area of the vibration isolation device.

In addition, according to one aspect of the present invention, a method for adjusting a vibration isolation device for a rotating machine includes a vibration isolation stand that receives a load from the rotating machine, an elastic support part that supports the vibration isolation stand, a sliding support part that supports the vibration isolation stand and limits the vertical deflection of the elastic support part to a certain range and can slide laterally in response to the lateral vibration of the vibration isolation stand, a level adjustment part that adjusts the support height of the vibration isolation stand at the sliding support part, and a deflection adjustment part that adjusts the initial vertical deflection of the elastic support part. The method includes a first step of making the elastic support part unloaded from the deflection adjustment part, a second step of adjusting the support height of the vibration isolation stand at the sliding support part by the level adjustment part after the first step, and a third step of adjusting the initial vertical deflection of the elastic support part by the deflection adjustment part after the second step.

According to the above aspect of the present invention, it is possible to prevent deformation of the elastic support part and misalignment of the rotating machine due to settling of the elastic material while ensuring vibration-proofing performance.

1 is an overall configuration diagram of a pump facility according to a first embodiment; 1 is a plan view showing the configuration of a vibration isolation system according to a first embodiment. FIG. 1 is a cross-sectional configuration diagram of a vibration isolation device according to a first embodiment (first vibration isolation device). 4A to 4C are explanatory diagrams of a method for adjusting the vibration isolation device according to the first embodiment. 4A to 4C are explanatory diagrams of a method for adjusting the vibration isolation device according to the first embodiment. 1 is an explanatory diagram of the operation principle of the vibration isolation device according to the first embodiment. 5 is a graph showing an example of a measurement result of a measurement unit according to the first embodiment. FIG. 4 is a cross-sectional configuration diagram showing a modified example of the vibration isolation device according to the first embodiment (first vibration isolation device). FIG. 4 is a cross-sectional configuration diagram showing a modified example of the vibration isolation device according to the first embodiment (first vibration isolation device). FIG. 4 is a cross-sectional configuration diagram showing a modified example of the vibration isolation device according to the first embodiment (first vibration isolation device). FIG. 4 is a cross-sectional configuration diagram showing a modified example of the vibration isolation device according to the first embodiment (first vibration isolation device). FIG. 4 is a cross-sectional configuration diagram showing a modified example of the vibration isolation device according to the first embodiment (first vibration isolation device). FIG. 4 is a cross-sectional configuration diagram showing a modified example of the vibration isolation device according to the first embodiment (first vibration isolation device). FIG. 4 is a cross-sectional configuration diagram showing a modified example of the vibration isolation device according to the first embodiment (first vibration isolation device). FIG. 4 is a cross-sectional configuration diagram showing a modified example of the vibration isolation device according to the first embodiment (first vibration isolation device). FIG. 4 is a cross-sectional configuration diagram showing a modified example of the vibration isolation device according to the first embodiment (first vibration isolation device). FIG. 4 is a cross-sectional configuration diagram showing a modified example of the vibration isolation device according to the first embodiment (first vibration isolation device). FIG. 4 is a cross-sectional configuration diagram showing a modified example of the vibration isolation device according to the first embodiment (first vibration isolation device). FIG. 11 is a plan view showing the configuration of a vibration isolation system according to a second embodiment. FIG. 11 is a cross-sectional view of a vibration isolation device according to a second embodiment (a second vibration isolation device). FIG. 11 is a plan view showing the configuration of a vibration isolation system according to a third embodiment. FIG. 13 is a cross-sectional view of a vibration isolation device according to a third embodiment (third vibration isolation device).

One embodiment of the present invention will be described below with reference to the drawings.

First Embodiment
FIG. 1 is an overall configuration diagram of a pump facility 1 according to a first embodiment.
The pump equipment 1 shown in Fig. 1 includes a driver 10, a reducer 20 (rotating machine), and a pump assembly 30. The pump assembly 30 is a so-called vertical shaft pump. The driver 10 and the reducer 20 are installed on a first floor 2A of a building foundation 2 (foundation). The pump assembly 30 is installed on a second floor 2B of the building foundation 2.

The driving machine 10 is composed of a diesel engine, a gas turbine, a motor, etc. The driving shaft 11 of the driving machine 10 extends horizontally and is connected to the reduction gear 20 via a shaft coupling 12. The reduction gear 20 is a so-called orthogonal reduction gear, and is supported by a vibration isolation system 50 (described later) installed on the first floor 2A directly above the pump casing 31 of the pump assembly 30, and has an output shaft 21 that reduces the rotational force of the driving machine 10 and transmits it to the pump rotation shaft 32 vertically below.

The pump rotating shaft 32 extends from a shaft through-hole 33 at the top of the pump casing 31 to the outside of the pump casing 31 and is connected to the output shaft 21 of the reducer 20 via a shaft coupling 22. At the shaft through-hole 33, the pump rotating shaft 32 is free to rotate, but is sealed so that pumped or discharged water inside the pump casing 31 does not leak outside the pump casing 31.

The pump casing 31 is equipped with a suspended casing 34 that is roughly cylindrical and arranged with its cylindrical axis vertical, a discharge elbow 35 that is connected to the top of the suspended casing 34 and bends the flow direction horizontally, a discharge bowl 36 that is connected to the bottom of the suspended casing 34 and has guide vanes 36a inside, and a suction bell 37 that is further connected to the bottom of the discharge bowl 36 and forms a suction port 37a for the water flow into the pump casing 31.

The pump casing 31 is fixed to the second floor 2B by the pump base 31a. Inside the pump casing 31, the pump rotating shaft 32 extends along the central axis of the suspended casing 34, and is equipped with an impeller 38 below the guide vanes 36a. In addition, a discharge pipe 39 that forms a water flow discharge port (not shown) is connected horizontally to the downstream side of the discharge elbow 35. The suction port 37a of the suction bell 37 is submerged in the suction tank 6.

The pump shaft 32 is rotatably supported by submerged bearings 40, 41, an intermediate bearing 42, and an outer bearing 43. The submerged bearing 40 supports the lower end of the pump shaft 32 inside the suction bell 37. The submerged bearing 41 supports the lower part of the pump shaft 32 inside the discharge bowl 36. The intermediate bearing 42 supports the middle part of the pump shaft 32 inside the suspended casing 34.

The submerged bearings 40, 41 and the intermediate bearing 42 are sliding bearings that are in sliding contact with the pump shaft 32. The outer bearing 43 is provided at the top of the discharge elbow 35 and supports the upper part of the pump shaft 32. The outer bearing 43 is a thrust bearing that receives the thrust load of the pump shaft 32. In other words, the thrust load of the pump shaft 32 is received by the pump casing 31 via the outer bearing 43.

In the pump equipment 1 configured as above, when the driving machine 10 starts operating, the pump rotating shaft 32 and impeller 38 rotate via the reduction gear 20. As a result, the liquid in the suction tank 6 is sucked into the pump casing 31 from the suction port 37a, pumped vertically upward inside the pump casing 31, then bends horizontally and passes through the discharge pipe 39 before being discharged into the discharge tank (not shown).

As shown in FIG. 1, the reducer 20 is supported by a support frame 51, and is supported by a plurality of vibration isolation devices 60 via the support frame 51. The vibration isolation system 50, which includes the support frame 51 and the plurality of vibration isolation devices 60, is installed on the first floor 2A of the building foundation 2. An edge foundation 3 is erected on the first floor 2A, surrounding the installation area of the vibration isolation system 50 (vibration isolation devices 60) in a plan view. On the inside of the edge foundation 3, a step 4 is formed that is lower than the floor surface of the first floor 2A.

A raised part 5 is installed on the step 4 at a height equal to or higher than the edge foundation 3, in which the vibration isolation system 50 (vibration isolation device 60) is placed. The raised part 5 is composed of, for example, a concrete block body similar to the building foundation 2. This prevents the vibration isolation system 50 (vibration isolation device 60) from being hidden under the edge foundation 3, making it easier to adjust the vibration isolation device 60 (described later). Note that since the position of the reducer 20 is high, a step stool or the like may be installed.

FIG. 2 is a plan view showing the configuration of the vibration isolation system 50 according to the first embodiment.
2, the vibration isolation system 50 includes a support frame 51 that supports the reducer 20, and a plurality of vibration isolation devices 60 that support the support frame 51. The support frame 51 includes a lattice structure 52, and a top plate 53 that is fixed to the lattice structure 52 and supports the reducer 20.

The lattice structure 52 is made up of four beams, two vertically and two horizontally, in plan view, and has eight protruding parts 52a-52h around the periphery. The same number of vibration isolation devices 60 are provided as the protruding parts 52a-52h, and support each of the protruding parts 52a-52h. These multiple vibration isolation devices 60 are made up of a first vibration isolation device 60A that has both an elastic support part 70 and a sliding support part 80, which will be described later.

FIG. 3 is a cross-sectional view of the vibration isolation device 60 (first vibration isolation device 60A) according to the first embodiment.
As shown in Figure 3, the vibration isolation device 60 comprises a vibration isolation stand 61 that receives load from the reducer 20 via the support stand 51, an elastic support part 70 that supports the vibration isolation stand 61, and a sliding support part 80 that supports the vibration isolation stand 61, limits the amount of vertical deflection of the elastic support part 70 to a certain amount, and is capable of sliding laterally in response to lateral vibration of the vibration isolation stand 61.

The vibration isolation stand 61 is a horizontal plate on which the lattice structure 52 rests. The vibration isolation stand 61 is connected to a sole plate 64 (base) via an elastic support part 70 and a sliding support part 80. The sole plate 64 is fixed to the building foundation 2 (the bulkhead part 5 in this embodiment) via an anchor bolt 65. The vibration isolation device 60 includes a vertical vibration stopper 62 and a horizontal vibration stopper 63 for the vibration isolation stand 61.

The vertical vibration stopper 62 has a rod 62a that stands vertically (vertically) from the sole plate 64. The rod 62a passes vertically through the vibration isolation stand 61. An upper limit stopper 62b and a lower limit stopper 62c are fixed to the rod 62a. The upper limit stopper 62b is positioned above the vibration isolation stand 61. The lower limit stopper 62c is positioned below the vibration isolation stand 61.

The upper limit stopper 62b and the lower limit stopper 62c are arranged with a gap larger than the thickness of the vibration isolation stand 61. These upper limit stopper 62b and lower limit stopper 62c set the allowable vertical vibration width of the vibration isolation stand 61. In other words, a gap is formed at least either between the upper limit stopper 62b and the vibration isolation stand 61, or between the lower limit stopper 62c and the vibration isolation stand 61.

The lateral vibration stopper 63 has a side wall member 63a that stands upright from the sole plate 64. The side wall member 63a supports a horizontal stopper 63b that faces the side of the vibration isolation stand 61. The horizontal stopper 63b sets the allowable lateral vibration width of the vibration isolation stand 61. Note that the reference symbol 63c may be an elastic material. The reference symbol 63c may also be a sensor that detects contact between the vibration isolation stand 61 and the horizontal stopper 63b. A gap may also be formed between the reference symbol 63c and the vibration isolation stand 61.

The elastic support parts 70 are disposed between the vibration-isolating stand 61 and the sole plate 64, and elastically support the vibration-isolating stand 61. The elastic support parts 70 are disposed in pairs, sandwiching the sliding support part 80 described below. The number of elastic support parts 70 is not limited as long as they are disposed in a manner that can support the vibration-isolating stand 61 in a well-balanced manner. The elastic support parts 70 include an elastic material 71 (vibration-isolating material) and a plate 72 fixed to the upper surface of the elastic material 71.

The elastic material 71 is made of a vibration-absorbing material such as rubber. The material of the elastic material 71 should be selected based on the size and vibration characteristics of the rotating machine to be supported. The plate 72 is fixed in contact with the deflection adjustment unit 91 (described below) so as not to separate. In other words, the elastic support unit 70 elastically supports the vibration isolation stand 61 via the elastic material 71, the plate 72, and the deflection adjustment unit 91.

A measuring unit 100 is disposed below the elastic support unit 70, which measures at least one of the load and vibration acting on the elastic support unit 70. This measuring unit 100 is preferably, for example, a load cell (three-axis orthogonal measurement type). The measurement results of the measuring unit 100 are output to the detecting unit 101. The detecting unit 101 detects an abnormality or a sign of an abnormality in the reducer 20 based on the measurement results of the measuring unit 100 (described later). The detecting unit 101 is composed of a calculation device including a CPU, etc.

The deflection amount adjustment unit 91 adjusts the amount of initial vertical deflection of the elastic support unit 70. This deflection amount adjustment unit 91 is composed of a bolt and a nut. The deflection amount adjustment unit 91 is provided on the vibration isolation stand 61 side, and adjusts the amount of downward protrusion from the underside of the vibration isolation stand 61 to adjust the amount of initial vertical deflection of the elastic support unit 70 (elastic material 71).

The sliding support part 80 is disposed between the vibration isolation stand 61 and the sole plate 64, and supports the vibration isolation stand 61. The sliding support part 80 is disposed between the pair of elastic support parts 70 described above. The number of sliding support parts 80 is not limited, and the arrangement of the sliding support parts 80 and the elastic support parts 70 may be reversed. The sliding support part 80 includes a first member 81, a sliding part 82, and a second member 83. The first member 81 and the second member 83 are formed from a rigid member that does not elastically deform, unlike the elastic material 71.

The first member 81 is fixed to the sole plate 64. The sliding portion 82 is provided on the upper surface of the first member 81. The sliding portion 82 allows the second member 83 to sway (slide) sideways relative to the first member 81. This sliding portion 82 is made of a polytetrafluoroethylene-based low-friction material or a metal thrust washer. The second member 83 is fixed in contact with the level adjustment portion 92 described below so as not to separate. In other words, the sliding support portion 80 supports the vibration isolation stand 61 in a sliding manner via the first member 81, the sliding portion 82, the second member 83, and the level adjustment portion 92.

The level adjustment unit 92 adjusts the support height of the vibration-proof stand 61 on the sliding support unit 80. The level adjustment unit 92 is composed of a bolt and a nut. The level adjustment unit 92 is provided on the vibration-proof stand 61 side, and adjusts the support height of the vibration-proof stand 61 on the sliding support unit 80 by adjusting the amount of downward protrusion from the underside of the vibration-proof stand 61. In this embodiment, due to the arrangement relative to the support stand 51 (lattice structure 52), the level adjustment units 92 are installed in multiple locations so that the sliding support unit 80 can be pressed in a balanced manner, but a single level adjustment unit may be provided.

Next, the adjustment method for the vibration isolation device 60 configured as described above (particularly the adjustment method during installation work) will be described with reference to Figures 4 and 5.

4 and 5 are explanatory diagrams of a method for adjusting the vibration isolation device 60 according to the first embodiment.
When adjusting the vibration isolation device 60, first, as shown in Fig. 4, the deflection adjustment part 91 is placed in a state where no load is applied to the elastic support part 70 (first step). That is, in this state, the vibration isolation stand 61 is supported only by the sliding support part 80.
Next, the support height of the vibration-isolating stand 61 on the sliding support parts 80 is adjusted by the level adjustment parts 92 (second step). In this state, the gap between the vibration-isolating stand 61 and the elastic support parts 70 becomes the initial gap d.

Next, as shown in FIG. 5, the deflection amount adjustment part 91 is used to adjust the initial deflection amount of the elastic support part 70 in the vertical direction (third step). Specifically, the deflection amount adjustment part 91 is screwed in and a load is applied to the elastic material 71 to adjust the deflection amount of the elastic material 71. By adjusting the deflection amount of the elastic material 71, it is possible to adjust the natural frequency of the elastic material 71 to match the vibration characteristics of the reducer 20, and it is possible to optimize the vibration isolation performance.

By the above adjustment, the gap between the vibration isolation stand 61 and the elastic support portion 70 becomes the initial gap d plus the initial deflection amount x.
Finally, it is confirmed that the second member 83 (sliding material) is in contact with (supported by) the sliding portion 82 (sliding material) in the sliding support portion 80.
This completes the adjustment of the vibration isolation device 60.

Next, the operating principle of the vibration isolation device 60 configured as described above will be explained with reference to FIG. 6.

FIG. 6 is an explanatory diagram of the operating principle of the vibration isolation device 60 according to the first embodiment.
First, we will explain the relationship between the deflection amount of the elastic material 71 and the natural frequency. As shown in Figure 6, if the load received by the vibration isolation stand 61 is W, the load (reaction force) on the elastic material 71 is M, the spring constant (vertical direction) of the elastic material 71 is k, and the deflection amount (vertical direction) of the elastic material 71 is x, then F, which is the load applied to the sliding support part 80, is expressed by the following formula (1).
F = W-2 M ... (1)

Next, the condition for the sliding portion 82 to be in contact is F>0, and therefore the relationships in the following expressions (2) and (3) hold.
F = W-2 M>0 ... (2)
M < W / 2 ... (3)

Next, since the vibration isolation design conditions are M>0 and M=k·x, the relationships of the following equations (4) to (6) hold.
0 < M < W / 2 ... (4)
0 < k x < W / 2 ... (5)
0 < x < W / 2k ... (6)

Here, the natural frequency _f0 of the elastic material 71 is expressed by the following formula (7), where _kd is the dynamic spring constant of the elastic material 71. As shown in the following formula (7), the natural frequency _f0 can be adjusted by the deflection amount x of the elastic material 71.

Next, a description will be given of the conditions under which the sliding portion 82 slides. As described above, the load F applied to the sliding support portion 80 is expressed by the following formula (8).
F = W-2 k x ... (8)

Next, when the frictional force of the sliding portion 82 is F ₀ and the friction coefficient of the sliding portion 82 is μ ₀ , the relationships of the following equations (9) and (10) hold.
F ₀ = μ ₀ F ... (9)
F ₀ = μ ₀ (W-2 k x) ... (10)

Next, when the horizontal excitation force received by the vibration isolation stand 61 is P, the excitation force condition at which the sliding portion 82 slides is P−F ₀ >0, and therefore the relationship of the following equations (11) and (12) holds.
P> _F0 ... (11)
P>μ ₀ (W-2 k x) ... (12)

Here, since x>0, when P> _μ0 ·W, slippage occurs regardless of the value of x. On the other hand, when P≦ _μ0 ·W, slippage occurs when the relationship in the following formulas (13) and (14) holds. In other words, it is advisable to adjust x so that the following formulas (13) and (14) are satisfied.
2μ ₀ k x > μ ₀ W-P ... (13)

Next, the determination of the presence or absence of an abnormality by the detection unit 101 of the vibration isolation device 60 configured as described above will be described with reference to FIG. 7.

7 is a graph showing an example of the measurement result of the measurement unit 100 according to the first embodiment. In FIG. 7, the vertical axis represents the detection level (% relative to the threshold value), and the horizontal axis represents the date. The threshold value (100%) is indicated by a dotted line.
As shown in Fig. 7, the reducer 20 (pump equipment 1) repeatedly operates and stops. The first peak P1 of the detection level on the 13th day was caused by an earthquake that occurred while the equipment was stopped. Since the first peak P1 was below the threshold, the detection unit 101 was determined to be sound.

The second peak P2 of the detection level on the 20th day was caused by an earthquake that occurred during operation. Because the second peak P2 exceeded the threshold, the detection unit 101 determined that there was a possibility of equipment damage (determined that there was an abnormality) and issued a notification such as an alarm or a request for inspection by the manufacturer. In this way, by being able to monitor the load and vibration changes during operation, it is possible to understand how much margin there is for abnormal values, and by managing the trend in the amount of change, it is also possible to predict to some extent the period until abnormal vibration is reached (breakdown).

As shown in FIG. 3, the vibration isolation device 60 configured as above can prevent deformation due to vertical sagging of the elastic material 71 by installing the sliding support part 80 together with the elastic support part 70. This eliminates the additional work unique to the vibration isolation stand 61 that was previously required (removing initial sagging of the elastic material 71, and centering work by adjusting shims), improving workability and shortening the construction process. It also makes it possible to prevent misalignment of the reducer 20 due to aging (sagging) of the elastic material 71. In addition, in the case of rotating machinery with a large deviation in the center of gravity, such as a reducer with a fluid coupling, it was difficult to achieve horizontality of the support stand 51, but the sliding support part 80 improves construction.

Therefore, according to the present embodiment described above, by adopting a configuration including a vibration isolation stand 61 that receives the load from the reducer 20, an elastic support part 70 that supports the vibration isolation stand 61, and a sliding support part 80 that supports the vibration isolation stand 61, limits the vertical deflection of the elastic support part 70 to a certain amount, and is capable of sliding laterally in response to the lateral swing of the vibration isolation stand 61, it is possible to prevent deformation of the elastic support part 70 due to sagging of the elastic material 71 and misalignment of the reducer 20 while ensuring the vibration isolation performance of the vibration isolation device 60.

The reducer 20 illustrated in this embodiment is an orthogonal reducer that receives a thrust load on the pump assembly 30 side and does not receive a thrust load (a vertical excitation force), so the excitation force of the orthogonal reducer only needs to be considered in the horizontal direction. Therefore, as shown in the operating principle of the vibration isolation device 60 described above (see Figure 6), it is possible to prevent deformation of the elastic material 71 due to vertical sagging and misalignment of the reducer 20 while ensuring horizontal vibration isolation performance.

In addition, in this embodiment, as shown in FIG. 3, the sliding support section 80 is provided with a level adjustment section 92 that adjusts the support height of the vibration isolation stand 61, making it easier to center the reducer 20. This makes it possible to improve the ease of centering when installing a new reducer 20 and the ease of re-centering when replacing the sliding section 82, elastic material 71, etc.

In addition, this embodiment is equipped with a deflection adjustment section 91 that adjusts the initial vertical deflection of the elastic support section 70, so that the natural frequency of the elastic material 71 can be adjusted to match the vibration characteristics of the rotating machine, enabling optimization of vibration isolation performance.

In addition, this embodiment is equipped with a measuring unit 100 that measures at least one of the load and vibration applied to the elastic support unit 70, making it possible to monitor changes in load and vibration during operation. Also, by checking the amount of load during construction, it is possible to more precisely adjust the natural frequency of the elastic material 71.

In addition, this embodiment is equipped with a detection unit 101 that detects abnormalities or signs of abnormalities in the reducer 20 based on the measurement results of the measurement unit 100, so that it is possible to detect abnormalities in the target equipment from changes in load and vibration during operation, and also to grasp how much margin there is for abnormal values. By managing the trend in the amount of change, it is also possible to predict to some extent the period until abnormal vibration is reached (breakdown).

In addition, the pump equipment 1 according to this embodiment includes the above-mentioned vibration isolation device 60 (vibration isolation system 50), the reducer 20 supported by the vibration isolation device 60, and the pump assembly 30 connected to the reducer 20. This ensures vibration isolation performance while preventing deformation of the elastic support part 70 due to sagging of the elastic material 71 and misalignment of the reducer 20, thereby ensuring the soundness of the pump equipment 1.

In addition, as shown in FIG. 1, this embodiment includes an edge base 3 that surrounds the installation area of the vibration isolation device 60 (vibration isolation system 50) and a raised portion 5 that positions the vibration isolation device 60 at a height equal to or higher than the edge base 3. This allows the vibration isolation device 60 to be installed at a level above the floor level of the first floor 2A without having to lower the support frame 51, improving the ease of installation of the vibration isolation device 60 and the ease of maintenance, such as replacement of the elastic material 71.

As shown in FIG. 2, the vibration isolation system 50 of this embodiment includes a support frame 51 that supports the reducer 20, and a plurality of vibration isolation devices 60 that support the support frame 51, and each of the plurality of vibration isolation devices 60 is configured with a first vibration isolation device 60A that includes both an elastic support portion 70 and a sliding support portion 80. With this configuration, all of the vibration isolation devices 60 have vibration isolation and sliding support, and the amount of deflection can be adjusted, resulting in extremely high vibration isolation performance.

The first vibration isolation device 60A according to the first embodiment described above may adopt the following modified examples. In the following description, the same or equivalent configurations as those in the above embodiment are given the same reference numerals, and the description thereof will be simplified or omitted.

FIG. 8 is a cross-sectional configuration diagram showing a modification of the vibration isolation device 60 (first vibration isolation device 60A) according to the first embodiment.
8 uses a rolling element in the sliding portion 82. According to this modification, the sliding portion 82 has a rolling structure, so that friction in the horizontal direction is reduced, and it is possible to reduce the vibration transmitted to the first member 81. In addition, the effect of wear is reduced compared to sliding materials such as polytetrafluoroethylene.

FIG. 9 is a cross-sectional configuration diagram showing a modification of the vibration isolation device 60 (first vibration isolation device 60A) according to the first embodiment.
In the modification shown in Fig. 9, the elastic support part 70 is arranged in the horizontal direction. According to this modification, the vertical load is entirely borne by the sliding support part 80, so there is no load distribution with the elastic support part 70. Therefore, there is almost no effect (misalignment) due to the sagging of the elastic material 71. In addition, the structure can be simplified by using the elastic support part 70 as the lateral oscillation stopper 63 described above.

FIG. 10 is a cross-sectional configuration diagram showing a modified example of the vibration isolation device 60 (first vibration isolation device 60A) according to the first embodiment.
In the modified example shown in Fig. 10, a level adjustment part 92 is incorporated as part of the sliding support part 80 and is disposed below the sliding part 82. This modified example also has the same performance as the basic form of the first embodiment described above (see Fig. 3).

FIG. 11 is a cross-sectional configuration diagram showing a modified example of the vibration isolation device 60 (first vibration isolation device 60A) according to the first embodiment.
In the modified example shown in Fig. 11, a level adjustment unit 92 also functions as a deflection adjustment unit 91. According to this modified example, since it is necessary to perform the level adjustment and the deflection adjustment simultaneously, the workability is lower than that of the basic form of the above-mentioned first embodiment. However, since the level adjustment and the deflection adjustment are performed simultaneously, the structure can be simplified.

FIG. 12 is a cross-sectional configuration diagram showing a modified example of the vibration isolation device 60 (first vibration isolation device 60A) according to the first embodiment.
The modified example shown in Fig. 12 is another example in which the level adjustment unit 92 also functions as the deflection adjustment unit 91. In this modified example, similar to Fig. 10, the level adjustment unit 92 is incorporated as part of the sliding support unit 80. In this modified example, the level adjustment and the deflection adjustment must also be performed simultaneously, so the workability is lower than that of the basic form of the first embodiment described above. However, since the level adjustment and the deflection adjustment are performed simultaneously, the structure can be simplified.

FIG. 13 is a cross-sectional configuration diagram showing a modified example of the vibration isolation device 60 (first vibration isolation device 60A) according to the first embodiment.
13 omits the level adjustment unit 92. According to this modification, the level needs to be adjusted below the sole plate 64 or on the side of the reducer 20, and the workability is lower than that of the basic form of the first embodiment described above. However, since the level adjustment unit 92 is omitted, the structure can be simplified.

FIG. 14 is a cross-sectional configuration diagram showing a modified example of the vibration isolation device 60 (first vibration isolation device 60A) according to the first embodiment.
The modified example shown in Fig. 14 is another example in which the level adjustment unit 92 is omitted. In this modified example, the deflection adjustment unit 91 is incorporated as part of the elastic support unit 70 and is disposed below the elastic material 71. According to this modified example, as in Fig. 13, the level adjustment needs to be performed below the sole plate 64 or on the reducer 20 side, and the workability is lower than that of the basic form of the first embodiment described above. However, since the level adjustment unit 92 is omitted, the structure can be simplified.

FIG. 15 is a cross-sectional configuration diagram showing a modified example of the vibration isolation device 60 (first vibration isolation device 60A) according to the first embodiment.
15 omits the deflection amount adjustment unit 91 and the level adjustment unit 92. According to this modification, the deflection amount of the elastic material 71 is affected by the manufacturing accuracy and assembly accuracy of parts such as the sliding support unit 80. Furthermore, since there is no deflection amount adjustment unit 91, it is not possible to adjust the vibration isolation performance (natural frequency). However, since the deflection amount adjustment unit 91 and the level adjustment unit 92 are omitted, the structure can be simplified.

FIG. 16 is a cross-sectional configuration diagram showing a modified example of the vibration isolation device 60 (first vibration isolation device 60A) according to the first embodiment.
16, a measuring unit 100 is provided between the elastic support unit 70 and the vibration isolation stand 61 (deflection amount adjustment unit 91). According to this modification, the measuring unit 100 is disposed closer to the reducer 20, making it easier to check changes in the state of the device.

FIG. 17 is a cross-sectional configuration diagram showing a modified example of the vibration isolation device 60 (first vibration isolation device 60A) according to the first embodiment.
In the modified example shown in Fig. 17, the measuring unit 100 is installed below the sliding support unit 80. If the amount of displacement of the measuring unit 100 is small, it is possible to install the measuring unit 100 below the sliding support unit 80 in this manner.

FIG. 18 is a cross-sectional configuration diagram showing a modified example of the vibration isolation device 60 (first vibration isolation device 60A) according to the first embodiment.
In the modified example shown in Fig. 18, the measuring unit 100 is configured with an acceleration sensor instead of a load cell. When the measuring unit 100 is an acceleration sensor, it does not need to be sandwiched between the elastic support unit 70 and the sole plate 64, and it may be installed at any position on the sole plate 64. Also, by providing a first measuring unit 100a on the upper vibration isolation stand 61 and a second measuring unit 100b on the lower sole plate 64, it is possible to check the vibration isolation performance from the vibration on the reducer 20 side and the building foundation 2 side of the vibration isolation device 60. Also, the acceleration sensor may be installed on a part connected to the support stand 51 and the sole plate 64.

Second Embodiment
Next, a second embodiment of the present invention will be described. In the following description, the same or equivalent components as those in the above-described embodiment are denoted by the same reference numerals, and the description thereof will be simplified or omitted.

FIG. 19 is a plan view showing the configuration of a vibration isolation system 50 according to the second embodiment.
As shown in Figure 19, in the second embodiment of the vibration isolation system 50, multiple vibration isolation devices 60 are composed of a first vibration isolation device 60A having both an elastic support portion 70 and a sliding support portion 80, and a second vibration isolation device 60B having only the elastic support portion 70 of the elastic support portion 70 and the sliding support portion 80.

FIG. 20 is a cross-sectional view of the vibration isolation device 60 (second vibration isolation device 60B) according to the second embodiment.
20, the second vibration isolation device 60B includes only the elastic support part 70 out of the elastic support part 70 and the sliding support part 80. In other words, the second vibration isolation device 60B does not include the sliding support part 80 and the level adjustment part 92 described above.

Returning to FIG. 19, the arrangement of the first vibration isolation device 60A and the second vibration isolation device 60B will be described. In the protrusions 52a to 52h of the support frame 51 arranged clockwise from the drive shaft 11 in a plan view, the protrusions 52a, 52d, 52e, and 52h are supported by the first vibration isolation device 60A, and the protrusions 52b, 52c, 52f, and 52g are supported by the second vibration isolation device 60B. The arrangement of the first vibration isolation device 60A and the second vibration isolation device 60B in a plan view is symmetrical with respect to an imaginary line passing through the drive shaft 11 as the center line.

According to the second embodiment having the above configuration, the second vibration isolation device 60B does not have a sliding support part 80 and does not require level adjustment, so the number of adjustment parts in the entire vibration isolation system 50 is reduced, improving the ease of adjustment work. In addition, the sagging of the elastic material 71 in the second vibration isolation device 60B can be prevented by the sliding support part 80 of the adjacent first vibration isolation device 60A.

Third Embodiment
Next, a third embodiment of the present invention will be described. In the following description, the same or equivalent components as those in the above-described embodiment are denoted by the same reference numerals, and the description thereof will be simplified or omitted.

FIG. 21 is a plan view showing the configuration of a vibration isolation system 50 according to the third embodiment.
As shown in Figure 21, in the third embodiment of the vibration isolation system 50, the multiple vibration isolation devices 60 are composed of a first vibration isolation device 60A having both the elastic support portion 70 and the sliding support portion 80, a second vibration isolation device 60B having only the elastic support portion 70 of the elastic support portion 70 and the sliding support portion 80, and a third vibration isolation device 60C having only the sliding support portion 80 of the elastic support portion 70 and the sliding support portion 80.

FIG. 22 is a cross-sectional view of the configuration of an anti-vibration device 60 (third anti-vibration device 60C) according to the third embodiment.
22, the third vibration isolation device 60C includes only the sliding support part 80 out of the elastic support part 70 and the sliding support part 80. In other words, the third vibration isolation device 60C does not include the elastic support part 70 and the deflection amount adjustment part 91 described above.

Returning to FIG. 21, the arrangement of the first vibration isolation device 60A, the second vibration isolation device 60B, and the third vibration isolation device 60C will be described. In the protruding portions 52a to 52h of the support frame 51 arranged clockwise from the drive shaft 11 in a plan view, the protruding portions 52a, 52d, 52e, and 52h are supported by the first vibration isolation device 60A, the protruding portions 52b and 52g are supported by the second vibration isolation device 60B, and the protruding portions 52c and 52f are supported by the third vibration isolation device 60C. The arrangement of the first vibration isolation device 60A, the second vibration isolation device 60B, and the third vibration isolation device 60C in a plan view is symmetrical with respect to an imaginary line passing through the drive shaft 11 as the center line.

According to the third embodiment having the above configuration, the second vibration isolation device 60B does not have a sliding support part 80, making level adjustment unnecessary, and the third vibration isolation device 60C does not have an elastic support part 70, making deflection adjustment unnecessary. This reduces the number of adjustment parts in the entire vibration isolation system 50, improving the ease of adjustment work. Furthermore, sagging of the elastic material 71 in the second vibration isolation device 60B can be prevented by the sliding support parts 80 of the adjacent first vibration isolation device 60A to third vibration isolation device 60C.

Although preferred embodiments of the present invention have been described and illustrated above, it should be understood that these are illustrative of the present invention and should not be considered as limiting. Additions, omissions, substitutions, and other modifications can be made without departing from the scope of the present invention. Thus, the present invention should not be considered as limited by the foregoing description, but rather by the scope of the claims.

For example, in the above embodiment, as shown in FIG. 1, a vertical pump is exemplified as the pump assembly 30, but a screw pump with an inclined rotation shaft as disclosed in JP 2011-21586 A may also be used. For example, the above-mentioned vibration isolation device 60 (vibration isolation system 50) can be applied to the portion indicated by reference numeral 16 in JP 2011-21586 A. In this case, the vibration isolation device 60 is disposed at an incline, but it is sufficient that the sliding support portion 80 is capable of sliding sideways in this inclined state. In other words, the "lateral vibration" referred to in this application includes not only horizontal vibration with the horizontal plane at 0°, but also lateral vibration in an inclined state within the range of ±30°.

In addition, for example, in the above embodiment, as shown in FIG. 2, the support frame 51 is configured to have a lattice structure 52, but the support frame 51 may be configured to have a two-lattice structure. In other words, the number of vibration isolation devices 60 is not limited to eight, and may be four.

In addition, for example, in the above embodiment, as shown in FIG. 1, the pump equipment 1 is configured to include an edge foundation 3 that surrounds the installation area of the vibration isolation device 60, and a raised portion 5 in which the vibration isolation device 60 is placed at a height equal to or higher than the edge foundation 3, but the pump equipment 1 may be configured to include a building foundation 2 without an edge foundation 3. In this case, a steel cover or the like may be installed on the step 4 so that it can be removed during maintenance work, etc.

In addition, for example, in the above embodiment, the vibration isolation device 60 (vibration isolation system 50) supports the reducer 20, but it may also be configured to support the drive machine 10. Furthermore, the vibration isolation device 60 can be applied to vibration isolation of rotating machines in general, not limited to the reducer 20 and the drive machine 10.

1 Pump equipment 2 Building foundation (foundation)
3 Edge foundation 5 Bulk portion 20 Reducer (rotating machine)
30 Pump assembly 50 Vibration isolation system 51 Support stand 60 Vibration isolation device 60A First vibration isolation device 60B Second vibration isolation device 60C Third vibration isolation device 61 Vibration isolation stand 70 Elastic support section 80 Support section 91 Deflection amount adjustment section 92 Level adjustment section 100 Measurement section 101 Detection section

Claims (7)

a vibration isolation stand for receiving a load from the rotating machine;
An elastic support portion that supports the vibration isolation stand;
A vibration isolation device for a rotating machine, comprising: a sliding support part that supports the vibration isolation frame, limits a vertical deflection amount of the elastic support part to a certain amount, and is capable of sliding laterally in response to a lateral vibration of the vibration isolation frame,
The rotating machine is a reducer connected to a pump assembly that receives a vertical excitation force,
The sliding support does not include an elastic material like the elastic support,
a level adjustment unit for adjusting the support height of the vibration isolation frame at the sliding support unit;
a deflection amount adjustment portion that adjusts an initial deflection amount of the elastic support portion in a vertical direction. The vibration isolation device for a rotating machine according to claim 1, characterized in that it is provided with a measuring unit that measures at least one of the load and vibration applied to at least one of the vibration isolation stand, the elastic support, and the sliding support. The vibration isolation device for a rotating machine according to claim 2, further comprising a detection unit that detects abnormalities or signs of abnormalities in the rotating machine based on the measurement results of the measurement unit. An anti-vibration device according to any one of claims 1 to 3;
A rotating machine supported by the vibration isolation device; and
a pump assembly connected to the rotary machine. An edge foundation surrounding an installation area of the vibration isolation device;
The pump facility according to claim 4, further comprising a raised portion for disposing the vibration isolation device at a height equal to or higher than the edge foundation. The pump equipment according to claim 4, characterized in that it is provided with a foundation without an edge foundation surrounding the installation area of the vibration isolation device. a vibration isolation stand for receiving a load from the rotating machine;
An elastic support portion that supports the vibration isolation stand;
a sliding support section that supports the vibration-isolating stand, limits the amount of vertical deflection of the elastic support section to a certain range, and is capable of sliding laterally in response to lateral vibration of the vibration-isolating stand;
a level adjustment unit for adjusting the support height of the vibration isolation frame on the sliding support unit;
a deflection amount adjustment unit that adjusts an initial deflection amount in a vertical direction of the elastic support portion,
a first step of placing the deflection amount adjustment portion in a state where no load is applied to the elastic support portion;
a second step of adjusting the support height of the vibration-proof stand on the sliding support part by the level adjustment part after the first step;
a third step of adjusting an initial deflection amount of the elastic support portion in the vertical direction by the deflection amount adjustment portion after the second step.

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