JP2002242831A - Installation mechanism of machinery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an installation mechanism not only preventing vibration of machinery from transmitting to a bed board but also suppressing the vibration of the installed machinery itself. SOLUTION: This installation mechanism is so constituted that, when installing the machinery 100 on the bed board 200, the side thereof close to a compression pump 3 of a vibration generating source is supportably fixed by a second support member 7 having a large spring constant, and the other side apart from the compression pump 3 is supportably fixed by a first support member 6 having a small spring constant. Natural frequencies of the first support member 6 and the second support member 7 are also differed from each other.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an installation mechanism for a mechanical device having a portion where vibration occurs during operation, such as a refrigerant compressor used for an air conditioner.

[0002]

2. Description of the Related Art The installation mechanism of this type of mechanical device includes:
For example, a configuration shown in FIG. 5 proposed in Japanese Patent Application Laid-Open No. 5-99143 is well known. In FIG. 5, reference numeral 100 denotes a mechanical device that generates vibration during operation of a refrigerant compressor or the like, 200 denotes a base plate on which the mechanical device 100 is installed, and 5 denotes a mechanical device.
The mounting feet 15 attached to the case body 1 of 00
0, a coil spring interposed between the lower rubber 17 and the upper rubber 18, and 19 is an upper rubber 18
And a stopper for preventing the vibration isolating support device including the coil spring 16 and the lower rubber 17 from coming off.

[0003] Since the conventional installation mechanism is configured as described above, the rotational frequency component is damped by the coil spring 16, and the lower rubber 17 and the upper rubber 18 cause higher harmonics (high frequency? In addition to the function of suppressing the amplification by the internal damping of the rubber, the projection 17b formed on the lower rubber 17 adds a softer spring in series, so that the coil spring 16 is formed by the rubber spring by the projection 17b.
It is said that a sufficient anti-vibration effect is obtained for the components in the surging frequency band, and that the transmission of vibration to the base plate 200 can be prevented.

However, in a mechanism in which the mechanical device 100 is mounted on the base plate 200 via a supporting means that is soft, that is, has a small spring constant, the mechanical device 100 vibrates violently.
Therefore, for example, in a mechanical device 100 such as a horizontal rotary compressor in which a compression pump 3 serving as a vibration generation source is eccentrically installed as shown in FIG. 6, the refrigerant pipe 4 connected to the case body 1 on the compression pump 3 side is formed. The displacement δ is given by δ = Lθ, where L is the pipe length and θ is the rotational displacement, and the shear stress increases in proportion to the displacement δ. There is a problem in that the rigidity itself and the member for fixing the refrigerant pipe 4 must be strong.

[0005]

Therefore, it is necessary to provide an installation mechanism that not only makes it difficult for the vibration of the mechanical device to be transmitted to the base plate, but also suppresses the vibration of the mechanical device itself to be installed. Had to be a challenge.

[0006]

According to the present invention, in order to solve the above-mentioned problems of the prior art, a mechanical device having a vibration generating source is supported and fixed using a plurality of supporting members having different natural frequencies. An installation mechanism having a configuration of 1;

An installation mechanism having a second configuration in which a mechanical device having a vibration generating source is supported and fixed using a plurality of support members having different spring constants;

A mechanical device having a vibration source at an eccentric position is supported and fixed on a vibration source side using a support member having a large spring constant, and a support member having a small spring constant is used on a side remote from the vibration source. An installation mechanism of a third configuration adapted to support and fix;

The installation mechanism according to any one of the second and third configurations, wherein the support member is formed by laminating a plurality of materials having different spring constants. It is.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIG.
This will be described in detail with reference to FIG. In addition, in order to facilitate understanding, in these figures, parts having the same functions as those described in FIGS. 5 and 6 are denoted by the same reference numerals.

The mechanical device 100 includes an electric motor 2 that generates small vibrations inside the case body 1 but hardly causes a problem, and is driven by the electric motors 2. Then, a compression pump 3 which generates much larger vibration is provided. The compression pump 3 serving as a vibration source is fixed at an eccentric position of the case body 1.

The refrigerant pipe 4 connected to the case body 1 supplies the refrigerant compressed to a predetermined high pressure by the compression pump 3 to an air-conditioning load (not shown), and the air-conditioned refrigerant under the air-conditioning load is supplied to the compression pump 3 again. Attached so that it can be returned.

Mounting feet 5 are attached to the lower portion of the end of the case body 1 on the side of the electric motor 2 and the lower portion of the end of the case body 1 on the side of the compression pump 3, respectively.
Are connected by the first support member 6 and the second support member 7, and the mechanical device 100 is installed on the base plate 200.

The first support member 6 is configured as shown in FIG. 3, and the second support member 7 is configured as shown in FIG.

That is, the first supporting member 6 is
An anchor bolt 8 erected in a metal, a nut 9 screwable to the anchor bolt 8, and a metal having an inner diameter through which the anchor bolt 8 can freely penetrate and having a smaller spring constant than a hard rubber 10A described later. As shown in FIG. 3, each member is arranged and a nut 9 is screwed into a screw portion of an anchor bolt 8 with a predetermined torque, so that the mounting foot 5 on the electric motor 2 side is formed. Is base plate 2
Fixed to 00.

On the other hand, the second support member 7 includes an anchor bolt 8 erected on the base plate 200, a nut 9 screwable to the anchor bolt 8, and a through hole through which the anchor bolt 8 can freely pass. And a hard rubber 10A having a spring constant larger than that of the coil spring 10. By arranging the respective members as shown in FIG. , is installed foot 5 of the compression pump 3 side is fixed to the base plate 200.

The coil spring 10 used as a vibration isolator for the first support member 6 has a small damping rate, and the hard rubber 10A used as a vibration isolator for the second support member 7 has a large damping rate. The coil spring 10 having a natural frequency of about 1 to 10 Hz and the hard rubber 10A having a natural frequency of about 4 to 15 Hz have different natural frequencies as appropriate, for example, the coil spring 10 has a natural frequency. Is 5 Hz, and the hard rubber 10A has a natural frequency of 15 Hz.

When the electric motor 2 and the compression pump 3 are compared, the center of gravity of the mechanical device 100 is biased toward the first support member 6 because the electric motor 2 is heavier. The first support member 6 provided with the coil spring 10 having a small spring constant supports the portion.

As described above, according to the installation mechanism of the present invention, the mechanical device 100 is mounted on the side of the compression pump 3, that is, on the side of the vibration generating source via the hard rubber 10A having a large spring constant of the second support member 7. The electric motor 2, which is mounted on the plate 200 and is away from the vibration source, is placed on the base plate 200 via the coil spring 10 having a small spring constant of the first support member 6. Therefore, even if the compression pump 3 generates a large-amplitude vibration at the time of starting, the displacement θ in the rotation direction on the side of the compression pump 3 is suppressed to be small (see FIG. 6). The shear stress acting on the pipe 3 is kept small.

On the other hand, the side of the heavy electric motor 2
Since the first support member 6 is supported by the coil spring 10 having a small spring constant, the vibration transmitted from the mechanical device 100 to the base plate 200 is also reduced.

Further, since the large difference in the natural frequency of the natural frequency and the hard rubber 10A of the coil spring 10, compressed during startup and stopping of the machine 100 pump 3
Does not coincide with the natural frequencies of the first support member 6 and the second support member 7 at the same time,
The mechanical device 100 does not vibrate violently due to resonance with the first and second support members 6 and 7.

Since the present invention is not limited to the above embodiment, various modifications can be made without departing from the spirit of the present invention.

For example, the hard rubber 10 of the second support means 7 is supported so that the entire case body 1 side can be supported by the compression pump 3.
A is formed to be elongated in a strip shape, and through-holes through which the anchor bolts 8 can freely pass are provided at both ends thereof, and the anchor bolts 8 are passed therethrough, and the nut 9 is screwed and fixed. Is also possible.

Further, not only the spring constants of the vibration isolators of the first support member 6 and the second support member 7 are made different, but also the first support members 6 and the second support members 7 are prevented from each other. It is also possible to configure so that the spring constant of the vibration material is also different.

Similarly, the first support member 6 and the second support member 7 can be configured so that the natural frequencies of the respective vibration damping members are different from each other.

As the vibration isolator of the first support member 6 and the second support member 7, in addition to the coil spring 10 and the hard rubber 10A, an oil damper, an air damper or the like can be used alone or in combination. .

[0027]

As described above, according to the first aspect of the present invention, the mechanical device is supported and fixed by using a plurality of support members having different natural frequencies. Even if the number changes, the natural frequencies of all the support members do not coincide with each other at the same time, so that the mechanical device does not resonate with all the support members and shakes violently.

Further, the vibration generating source side of the mechanical device is supported and fixed using a supporting member having a large spring constant, and the side remote from the vibration generating source is supported and fixed using a supporting member having a small spring constant. According to the invention of Item 3, since the displacement in the rotation direction due to the vibration is suppressed to a small value, the shear stress acting on the connected pipes is suppressed to a small value.

In the case of the third aspect of the present invention, when the mechanical device has a side remote from the vibration generating source, for example, the vibration generating source is a compression pump and an electric motor that is heavier than the compression pump is installed on the opposite side, the heavy Since the side is supported by the support member having a small spring constant, the vibration transmitted from the mechanical device to the installation portion is suppressed to be small.

[Brief description of the drawings]

FIG. 1 is an explanatory front view showing an embodiment of the present invention.

FIG. 2 is an explanatory plan view showing an embodiment of the present invention.

FIG. 3 is an explanatory diagram showing a main part of the present invention.

FIG. 4 is an explanatory view showing another main part of the present invention.

FIG. 5 is an explanatory diagram showing a conventional technique.

FIG. 6 is another explanatory diagram showing the conventional technique.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Case body 2 Electric motor 3 Compression pump 4 Refrigerant pipe 5 Installation foot 6 First support member 7 Second support member 8 Anchor bolt 9 Nut 10 Coil spring 10A Hard rubber 100 Mechanical device 200 Base plate

 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kiyoshi Tanaka 2-5-5 Keihanhondori, Moriguchi-shi, Osaka F-term in Sanyo Electric Co., Ltd. 3H003 AA05 AB05 AC03 BB02 BB04 CD01 CE02 CF04 3H071 AA06 BB02 CC22 DD89 3J048 AA01 BA05 BC02 CB22 DA01 EA09

Claims (4)

[Claims] An installation mechanism for a mechanical device, wherein a mechanical device having a vibration source is supported and fixed using a plurality of support members having different natural frequencies. 2. An installation mechanism for a mechanical device, wherein the mechanical device having a vibration source is supported and fixed using a plurality of support members having different spring constants. 3. A mechanical device having a vibration source at an eccentric position is supported and fixed on a vibration source side using a support member having a large spring constant, and a support member having a small spring constant is provided on a side remote from the vibration source. An installation mechanism for a mechanical device, wherein the installation mechanism is supported and fixed by using a device. 4. The mechanism according to claim 2, wherein the support member is formed by overlapping a plurality of materials having different spring constants.