JPH0245664A - Supporting device for rotary compressor - Google Patents

Abstract

PURPOSE:To secure the stable vibrationproof support by supporting the supporting legs installed at the nearly equal positions to the axis center of a motor-driven compression element through a vibrationproof member. CONSTITUTION:A rotary compressor 1 generates the revolution vibration around the axis center 5 of a motor-driven compression element by the load variation due to compression, when the motor-driven compression element in a sealed case 2 compresses coolant, and said sealed case 2 vibrates mainly in the revolution vibration around the axis center 5. Therefore, the vibration on the axis center 5 is the least, and the vibration of a mirror plate part 3 is the least at the axis center position 3a. Therefore, coolant piping 4 which serve as supporting leg are installed at the axis center positions 3a of the mirror plate part 3, and further, the vibration of the coolant piping 4 can be reduced by allowing the axis center 4a of the coolant piping 4 to coincide with the axis center 5. Therefore, the generation of noise generated by the vibration of the coolant pipe 4 can be suppressed.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a support device for a rotary compressor used in a refrigeration system or the like.

Conventional technology In recent years, compressors used in refrigeration equipment, etc.
From the perspective of saving energy, there has been a shift from reciprocating type to rotating type. These rotary compressors usually have an electric compression element directly fixed and housed in a sealed case, so load fluctuations occur around the axis of the electric compression element due to load fluctuations during compression of the electric compression element. Rotational vibrations and the like directly vibrate the closed case, and the vibrations also pass through the support device of the compressor, vibrating the main body of the refrigeration equipment, etc., and sometimes generating large noise.

Therefore, when supporting and fixing the compressor, the compressor is placed near the same axis as the electric compression element that is directly fixed and stored in the sealed case.
A substantially cylindrical support leg is provided that protrudes from the end of the sealed case in the axial direction, and this support leg is fixed to the support fitting via a substantially cylindrical vibration-proof support member made of an elastic material. A proposal has been made (Japanese Utility Model Publication No. 148290/1983) to reduce the vibrations transmitted from the compressor to the main body of the refrigeration system or the like through the support device, thereby preventing the generation of noise.

An example of the above-mentioned conventional support device for a rotary compressor will be described below with reference to the drawings.

6 and 7 show an example of a conventional support device for a rotary compressor.

In the figure, 1 is a rotary compressor, 2 is an airtight case that directly fixes and houses an electric compression element (not shown), and 3 is an end plate of the airtight case 2. Reference numeral 4 denotes a cylindrical refrigerant pipe that is provided at a position 3a above the axis 5 of the electric compression element of the end plate 3 of the sealed case 2, and whose axis 4d is located on the axis 5, protruding from the end plate 3. It also serves as Reference numeral 6 denotes a vibration-proof support member made of a cylindrical elastic material, into which the refrigerant pipe 4 is inserted and fixed into the inner circumferential part 6a, and whose outer circumferential part 6b is inserted and fixed into a cylindrical holding part 7a integrally formed with the support fitting 7. has been done. 6C is the lower part of the vibration-proof support member. 8 is a support plate, and the support metal fitting 7 is connected to the screw 9.
It is tightened and fixed.

The operation of the rotary compressor support device configured as above will be described below.

When the electric compression element in the sealed case 2 compresses the refrigerant, a rotational vibration is generated around the axis 6 of the stain dynamic pressure line element due to the load fluctuation due to compression, and the closed case 2 is centered around the axis 5. Vibrates due to rotational vibration.

Therefore, the vibration on the axis 5 is the smallest, and the vibration of the end plate 3 is the smallest at the axis position 3a.

Therefore, by attaching the refrigerant pipe 4 to the axial center position 3a of the head plate part and further aligning the axial center 4a of the refrigerant pipe 4 with the axial center 5, the vibration of the refrigerant pipe 4 is reduced compared to when it is attached to other parts. It can be made small, and the generation of noise caused by vibration of the refrigerant pipe 4 can be suppressed. Furthermore, by attaching the refrigerant pipe 4 to the axial center position 3a of the end plate 3 so that the axial center 4a coincides with the axial center 6, the vibration of the refrigerant pipe 4 can be reduced. By reducing the vibrations transmitted to the main body of the refrigeration system or the like through the vibration-proof support member 6 and the support fitting 7, it is possible to suppress the generation of noise caused by the vibration of the main body of the refrigeration system or the like.

Problems to be Solved by the Invention However, in the above configuration, the vibration isolating support member 6
Since it has a substantially double cylindrical shape, the compressor load is concentrated on the lower part 6c, and the amount of deflection of the lower part 6c of the vibration isolating support member 6 increases, and the distance between the lower part 6c becomes smaller. , and the increased hardness may result in insufficient damping of vibrations due to the internal viscosity of the vibration isolating support member 6, a small vibration damping effect against vibrations in the load direction, and vibrations in the refrigeration equipment body, resulting in noise. There was a problem that this occurred.

In view of the above-mentioned problems, the present invention provides a configuration that provides stable vibration-proof support.

Means for Solving the Problems In order to solve the above problems, the support device for a rotary compressor of the present invention includes an electric compression element that is provided at the end of a cylindrical sealed case and fixedly housed directly within the sealed case. The distance from the lower end of the inner periphery where the support leg is inserted and fixed to the lower end of the outer periphery is the distance from the upper end of the inner periphery to the upper end of the outer periphery. The anti-vibration support member has an inner and outer peripheral shape larger than the distance and is made of an elastic member, and a support fitting having a holding part for attaching the outer circumference of the anti-vibration support member to the inner circumference. .

Effect: With the above-described configuration, the present invention is provided with a support leg at approximately the same position as the axis of the electric compression element, and by supporting this support leg via a vibration-proof support member, the rotational vibration is placed at a position where rotational vibration is least. By supporting and fixing the rotary compressor with the rotary compressor, a large vibration-proofing effect against rotational vibration can be obtained. Furthermore, by increasing the distance from the lower end of the inner periphery to the lower end of the outer periphery, it is possible to obtain a vibration-proofing effect in the load direction even when the vibration-proof support member is largely deflected due to the load of the rotary compressor, external load, etc. This suppresses the vibrations of the refrigerant piping caused by the vibrations of the rotary compressor and the vibrations of the refrigeration system itself, thereby suppressing the generation of noise.

EXAMPLE Hereinafter, an example of the support device for a rotary compressor of the present invention will be described with reference to the drawings. In order to avoid duplication of explanation, the same parts as in the conventional example are given the same reference numerals and the explanation will be omitted.

1 to 5 show an embodiment of a support device for a rotary compressor according to the present invention.

In the figure, reference numeral 10 denotes a vibration-proof support member, which is made of an elastic member and has a cylindrical inner peripheral part 10a and an outer peripheral part 10b.The center 10C of the inner peripheral part 10a is the center 10C of the outer peripheral part 10b.
It is slightly eccentrically upward compared to od. That is, the lower end 10f of the inner peripheral part 10a and the lower end 1 of the outer peripheral part 10b
The lower part 10j surrounded by oh is slightly larger than the upper part 10i surrounded by the upper end 10e of the inner peripheral part 10a and the upper end 10q of the outer peripheral part 1ob. Reference numeral 11 denotes a support fitting, in which a cylindrical holding portion 11a is integrally molded, and is fastened and fixed to the support plate 12 with screws 13. In the rotary compressor 1, refrigerant pipes 4 which also serve as support legs provided on the shaft center 5 at two places on the left and right sides are inserted and fixed into the inner peripheral part 10a of the vibration-proof support member 10, and the vibration-proof support member 1o outer periphery 10
b is inserted and fixed into the holding portion 11a of the support fitting 11 to be supported and fixed.

The operation of the rotary compressor support device configured as above will be described below.

When an electric compression element (not shown) in a closed case 2 compresses refrigerant, the rotary compressor 1 generates rotational vibration around the axis 6 of the electric compression element due to load fluctuations due to compression.
The sealed case 2 vibrates mainly due to rotational vibration around the axis 6. Therefore, the vibration on the axis 5 is the smallest, and the vibration of the end plate 3 is the smallest at the axis position 3a. Therefore, the refrigerant pipe 4 which also serves as a support leg is connected to the end plate part 3.
It is attached to the axial center position 3a of the refrigerant pipe 4, and further the axial center 4 of the refrigerant pipe 4
By aligning a with the axis 6, the vibration of the refrigerant pipe 4 can be made smaller than when it is attached to other parts, and the noise generated by the vibration of the refrigerant pipe 4 can be reduced. It can be suppressed.

Further, since the rotary compressor 1 is supported and fixed to the support plate 12 via the vibration isolation support member 1o and the support metal fittings 11, vibrations are attenuated by the internal viscosity of the vibration isolation support member 1o, and the rotary compressor 1 is It is also possible to prevent the generation of noise caused by vibration of the support plate 12 caused by the vibration of the support plate 12. Moreover, the lower part 10e of the vibration-isolating support member 10 is largely deflected due to the load of the rotary compressor 1, external load, etc., and the vibration-isolating effect may deteriorate due to the distance range and increased hardness of the lower part 10e. 1of is pulled on the circumference to suppress the deflection to some extent, and the lower part 1oe is made large, so that even if the lower part 10e bends to some extent, the distance of the lower part 10e does not become so small, and Since the hardness UP can be kept small, the vibration damping effect due to internal viscosity will not be deteriorated so much, and therefore the generation of noise due to the vibration of the support plate 12 can be suppressed to a minimum.

Although a detailed explanation will be omitted, the shape of the vibration-proof support member 10 is the inner peripheral portion 10a as shown in this embodiment.

Even if the outer peripheral part 1ob is not substantially cylindrical, if the lower part 1Qθ is larger than the upper part 1Qf, only one of the inner peripheral part 10a shape and the outer peripheral part 10b shape is approximately cylindrical, or both of them are approximately cylindrical. Even if the shape is not cylindrical, the same effect as described above can be obtained.

Effects of the Invention As described above, the present invention provides a support leg that is provided at the end of a cylindrical sealed case and whose central axis is located approximately in the same vicinity as the axis of the electric compression element that is directly fixedly housed within the sealed case. and has an inner and outer circumferential shape such that the distance from the lower end of the inner circumference to the lower end of the outer circumference where the support leg is inserted and fixed is wider than the distance from the upper end of the inner circumference to the upper end of the outer circumference, and is elastic. A support device for a rotary compressor that includes a vibration-proof support member made of a member and a support fitting having a holding part for attaching the outer circumference of the vibration-proof support member to the inner circumference can achieve a supporting effect at a position where vibration is small. ,
Both the anti-vibration effect and the anti-vibration effect of the anti-vibration support member allow for anti-vibration support with extremely small vibration transmission claws, and also prevent deterioration of the anti-vibration effect caused by deflection of the anti-vibration support member due to the load of the rotary compressor, etc. Thus, by suppressing the generation of noise caused by the transmission of vibrations of the rotary compressor to the refrigeration apparatus main body, stable noise reduction of the refrigeration apparatus can be achieved.

[Brief explanation of the drawing]

Fig. 1 is a front view of a support device for a rotary compressor showing an embodiment of the present invention, Fig. 2 is a perspective view showing a vibration-proof support member of the support device, and Fig. 3 is a support metal fitting of the support device. A perspective view showing
Fig. 4 is a side view of a rotary compressor with refrigerant piping of the support device attached, Fig. 6 is a side view of the support device, Fig. 6 is a front view of a conventional support device of a rotary compressor, FIG. 7 is a side view of the support device. 2... Sealed case, 4... Refrigerant piping,
5...Axis center, 1o...Vibration isolation support member,
10a...Inner circumference, 10b...Outer circumference,' 10e, 10q...Top end, 1o
f, 1oh...Lower end portion, 11...Supporting metal fitting, 11a...Holding portion. Figure 1 106-゛-Outer keypad 114 Illustrated diagram? -Window case 4-i↑Holding pipe 5-・Ring and 10-・-Proof m Cross-holding member 10a--Inner Tll 115 10b--External part 10e, Iflh--Ichikami Hato 101, IQ&-T m W 1j-Support jLIL 11a ---N flF 152-IPPI earth 4-78 medium power distribution 5-... To glaze

Claims (1)

[Scope of Claims] (1) A support leg that is provided at the end of a cylindrical sealed case and whose central axis is located approximately in the same vicinity as the axis of an electric compression element that is directly fixedly housed within the sealed case; The inner and outer peripheries have shapes such that the distance from the lower end of the inner periphery to the lower end of the outer periphery where the support legs are inserted and fixed is larger than the distance from the upper end of the inner periphery to the upper end of the outer periphery, and A support device for a rotary compressor, comprising: a vibration-isolating support member; and a support fitting having a holding portion for attaching an outer peripheral portion of the vibration-isolating support member to an inner periphery. (2) The vibration-proof support member has a substantially cylindrical inner and outer peripheral shape, and the rotation according to claim 1, in which the center of the outer peripheral shape is eccentric downward with respect to the center of the inner peripheral shape. Support device for mold compressor. (3) The support device for a rotary compressor according to claim 1, wherein the vibration-proof support member has a substantially cylindrical inner circumference only. (4) The support device for a rotary compressor according to claim 1, wherein the vibration-proof support member has a substantially cylindrical outer peripheral shape.