JP3863724B2 - Mechanical installation mechanism - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an installation mechanism for a horizontal rotary compressor that includes a compression pump serving as a vibration generation source and an electric motor that is heavier than the compression pump and has a bias in the center of gravity .
[0002]
[Prior art]
As an installation mechanism for this type of mechanical device, for example, the configuration shown in FIG. 5 proposed in Japanese Patent Laid-Open No. 5-99143 is well known. In FIG. 5, 100 is a mechanical device that generates vibration during operation of a refrigerant compressor, 200 is a base plate for installing the mechanical device 100, 5 is an installation foot attached to the case body 1 of the mechanical device 100, and 15 is A column attached to the base plate 200, 16 is a coil spring interposed between the lower rubber 17 and the upper rubber 18, and 19 is a vibration isolating support device comprising the upper rubber 18, the coil spring 16 and the lower rubber 17. It is a clasp to prevent it.
[0003]
Since the conventional installation mechanism is configured as described above, the rotation frequency component is damped by the coil spring 16, and the surging phenomenon of the coil spring 16 is suppressed by the lower rubber 17 and the upper rubber 18 by the internal damping of the rubber. In addition, since a softer spring is added in series by the protrusion 17b formed on the lower rubber 17, the rubber spring by the protrusion 17b can sufficiently prevent the component of the surging frequency band of the coil spring 16. It is said that the vibration effect is exhibited and vibration transmission to the base plate 200 can be prevented.
[0004]
However, in the mechanism in which the mechanical device 100 is installed on the base plate 200 via the supporting means that is soft, that is, the spring constant is small, the mechanical device 100 itself vibrates vigorously, and therefore, for example, as shown in FIG. In a mechanical apparatus 100 such as a horizontal rotary compressor in which 3 is installed eccentrically, the displacement δ of the refrigerant pipe 4 connected to the compression pump 3 side in the case body 1 is δ where the pipe length is L and the displacement in the rotational direction is θ. = Lθ, and the shear stress increases in proportion to the displacement δ. Therefore, in order to prevent the refrigerant tube 4 from being damaged, the tube itself is robust and the member for fixing the refrigerant tube 4 is also robust. There was a problem that we had to do.
[0005]
[Problems to be solved by the invention]
Therefore, it is necessary to provide an installation mechanism that not only makes it difficult for vibration of a mechanical device such as a horizontal rotary compressor to be transmitted to the base plate, but also can suppress vibration of the mechanical device to be installed. It was.
[0006]
[Means for Solving the Problems]
Since the present invention is to solve the problems of the prior art, the electric motor on one side of definitive inside the case body, comprising a compression pump driven by the electric motor on the other side, the electric motor from the compressor pump It is a heavy installation mechanism for supporting a horizontal rotary compressor in which the compression pump serves as a vibration source and a refrigerant pipe is connected to the compression pump side, and the electric motor side of the case body is a coil having a small spring constant. A first support member made of a spring is used for support and fixing, and the compression pump side is supported and fixed using a second support member made of hard rubber having a spring constant larger than that of the coil spring . An installation mechanism of
[0007]
In the installation mechanism of the first configuration, each of the first support member and the second support member includes a plurality of support members, and the first support members and the second support members each have a spring constant. A second configuration installation mechanism configured to be different ;
Is to provide.
[000 8 ]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF EMBODIMENTS Hereinafter, an embodiment of an installation mechanism for a horizontal rotary compressor according to the present invention will be described in detail with reference to FIGS. In order to facilitate understanding, in these drawings, the same reference numerals are given to the portions having the same functions as the portions described in FIGS.
[000 9 ]
The mechanical device 100 is driven by the electric motor 2 in which a small vibration is generated inside the case body 1 but the vibration is not a problem, and is far more than the vibration of the electric motor 2. This is a horizontal rotary compressor including a compression pump 3 that generates large vibrations. And the compression pump 3 used as a vibration generation source is fixed to the eccentric position of the case body 1, and the refrigerant | coolant pipe | tube 4 is connected with this compression pump 3 side .
[00 10 ]
The refrigerant pipe 4 connected to the case body 1 supplies the refrigerant compressed by the compression pump 3 to a predetermined high pressure to an air conditioning load (not shown), and returns the refrigerant air-conditioned with the air conditioning load to the compression pump 3 again. It is attached so that it can.
[00 11 ]
Further, installation feet 5 are respectively attached to the lower end portion on the electric motor 2 side of the case body 1 and the lower end portion side on the compression pump 3 side, and each installation foot 5 and the base plate 200 are connected to the first. The mechanical device 100 is installed on the base plate 200 by being connected by the support member 6 and the second support member 7.
[00 12 ]
The first support member 6 is configured as shown in FIG. 3, and the second support member 7 is configured as shown in FIG.
[00 13 ]
That is, the first support member 6 includes an anchor bolt 8 erected on the base plate 200, a nut 9 that can be screwed to the anchor bolt 8, and an inner diameter that allows the anchor bolt 8 to pass through. And a metal coil spring 10 having a smaller spring constant than the hard rubber 10A, and each member is arranged as shown in FIG. 3 and the nut 9 is tightened to a screw portion of the anchor bolt 8 with a predetermined torque. Thus, the installation foot 5 on the electric motor 2 side is fixed to the base plate 200.
[00 14 ]
On the other hand, the second support member 7 includes an anchor bolt erected on the base plate 200, a nut 9 that can be screwed to the anchor bolt, and a through hole through which the anchor bolt 8 can pass freely. A hard rubber 10A larger than the coil spring 10 is arranged. As shown in FIG. 4, each member is arranged and a nut 9 is tightened to a screw portion of the anchor bolt 8 with a predetermined torque. The installation foot 5 is fixed to the base plate 200.
[00 15 ]
The coil spring 10 used as the vibration isolator for the first support member 6 has a small attenuation rate, and the hard rubber 10A used as the vibration isolation material for the second support member 7 has a large attenuation 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.
[00 16 ]
By the way, when the electric motor 2 and the compression pump 3 are compared, the electric motor 2 is heavier, so that the center of gravity of the mechanical device 100 is biased toward the first support member 6, and thus a large portion of the weight is reduced by the spring. A first support member 6 including a coil spring 10 having a small constant is supported.
[00 17 ]
As described above, according to the installation mechanism of the present invention, the mechanical device 100 is mounted on the base plate 200 via the hard rubber 10A having a large spring constant of the second support member on the compression pump 3 side, that is, on the vibration generation source side. In the state where the electric motor 2 side that is mounted on the base plate 200 and is separated 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. because it is installed, the compression pump 3 is be one that generates a large vibration amplitude is also displaced in the rotational direction of the side of the compression pump 3 theta is kept small at startup (see FIG. 6), thereby the refrigerant pipe 4 The acting shear stress is kept small.
[00 18 ]
On the other hand, since the side of the electric motor 2 that is heavier than the compression pump 3 is supported by the coil spring 10 having a small spring constant of the first support member 6, vibration transmitted from the mechanical device 100 to the base plate 200 is also generated. Can be kept small.
[00 19 ]
Further, since the natural frequency of the coil spring 10 and the natural frequency of the hard rubber 10A are greatly different, even if the frequency of the compression pump 3 changes when the mechanical device 100 is started or stopped, the first frequency is changed. Since the natural frequencies of the support member 6 and the second support member 7 do not coincide with each other at the same time, the mechanical device 100 does not resonate with the first and second support members 6 and 7 and does not shake violently.
[00 20 ]
In addition, since this invention is not limited to the said embodiment, various deformation | transformation implementation is possible in the range which does not deviate from the meaning as described in a claim.
[00 21 ]
For example, the hard rubber 10A of the second support member 7 is formed in a strip shape so that the entire case body 1 can support the compression pump 3 side, and through holes through which the anchor bolts 8 can pass freely are formed at both ends thereof. It is also possible to provide an anchor bolt 8 therethrough and to fix the nut 9 by screwing it.
[00 22 ]
Further, not only the spring constants of the vibration isolating materials of the first support member 6 and the second support member 7 are different from each other, but also the vibration isolating materials of the first support members 6 and the second support members 7 are different from each other. It is also possible to configure the spring constants to be different.
[00 23 ]
Similarly, it is possible to configure the first support member 6 and the second support member 7 so that the natural vibration frequencies of the vibration isolating materials are different from each other.
[00 24 ]
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 as a vibration isolator for the first support member 6 and the second support member 7.
[00 25 ]
【The invention's effect】
As described above, the present invention is an electric motor on one side of definitive inside the case body, comprising a compression pump driven by the electric motor on the other side, the electric motor is heavier than the compression pump, the compression The pump is a vibration generating source, and is an installation mechanism for supporting a horizontal rotary compressor in which a refrigerant pipe is connected to the compression pump side. The electric motor side of the case body is a first coil spring having a small spring constant. support fixed with 1 of the support member, the compression pump side, the spring constant is to support and fix using a second supporting member made of a large hard rubber than the coil spring, when starting the horizontal rotary compressor during or stop the displacement of the compressor pump side to generate a large vibration amplitude is kept small, thereby shearing response that acts on refrigerant pipe connected to the compressor pump side It can be suppressed small. Further, during start-up and stop, even if the frequency of the compression pump is changed, so it does not simultaneously match the natural frequency of the first support member and the second support member, a horizontal rotary compressor first The support member and the second support member do not sway violently.
[Brief description of the drawings]
FIG. 1 is an explanatory front view showing an embodiment of an installation mechanism of a horizontal rotary compressor according to the present invention.
FIG. 2 is an explanatory plan view showing an embodiment of an installation mechanism of a horizontal rotary compressor according to the present invention.
FIG. 3 is an explanatory view showing a first support member in an embodiment of an installation mechanism of a horizontal rotary compressor according to the present invention.
FIG. 4 is an explanatory view showing a second support member in an embodiment of an installation mechanism of a horizontal rotary compressor according to the present invention.
FIG. 5 is an explanatory diagram showing a conventional technique.
FIG. 6 is an explanatory view showing an installation mechanism of a conventional horizontal rotary compressor .
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Case body 2 Electric motor 3 Compression pump 4 Refrigerant pipe 5 Installation foot 6 1st support member 7 2nd support member 8 Anchor bolt 9 Nut 10 Coil spring 10A Hard rubber 100 Machine apparatus 200 Base plate

Claims (2)

Electric motor on one side of definitive inside the case body, comprising a compression pump driven by the electric motor on the other side, the electric motor is heavier than the compression pump, the compression pump becomes a vibration source, the compression An installation mechanism for supporting a horizontal rotary compressor in which a refrigerant pipe is connected to a pump side , wherein the electric motor side of the case body is supported and fixed by using a first support member made of a coil spring having a small spring constant. An installation mechanism for a horizontal rotary compressor , wherein the compression pump side is supported and fixed by using a second support member made of hard rubber having a spring constant larger than that of the coil spring . Each of the first support member and the second support member includes a plurality of support members, and the first support members and the second support members are configured to have different spring constants. The horizontal rotary compressor installation mechanism according to claim 1.

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