JPH01301962A - Supporter of rotary type compressor - Google Patents

Abstract

PURPOSE:To reduce a spring constant in a rotational direction so as to prevent oscillation in the rotational direction by inserting and fixing a support leg located on the axial center of an electrically driven compression element inside the inner edge part of an oscillation-proof member and connecting this inner edge part to an outer edge part via ribs. CONSTITUTION:Oscillation-proof support member 10 made of an elastic member consists of a cylindrical inner edge part 10a and an outer edge part 10b and only their lower halves are connected to each other via a plurality of rib 10c extending in radial direction. A supporting metal 11 includes its cylindrical holding part 11a integrated thereto. A rotary type compressor 1 is supported and fixed by inserting and fixing a refrigerant piping 4 commonly used as a support leg located on the axial center 5 in and to the inner edge part 10a of an oscillation proof support member 10 and inserting and fixing the outer edge part 10b of the oscillation proof support member 10 in and to the holding part 11a of the supporting metal 11.

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 a space-saving perspective, there has been a shift from reciprocating types to rotating types. These rotary compressors usually have an electric compression element directly fixed and housed in a sealed case, so rotation that occurs around the axis of the electric compression element due to load fluctuations during compression work of the electric compression element, etc. The vibrations directly vibrate the closed case, and the vibrations also pass through the support device of the compressor, causing the main body of the refrigeration system to vibrate, 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.
By providing a substantially cylindrical support leg projecting in the axial direction from the end of the sealed case, and fixing this support leg to a support fitting via a substantially cylindrical vibration-proof support member made of an elastic material. A proposal has been made (Utility Model Application Publication No. 5A-148290) to reduce the vibrations transmitted from the compressor to the main body of the refrigeration equipment 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 is a cylindrical refrigerant pipe provided protruding from the end plate 3 at a position 3a above the axis 6 of the electric compression element of the end plate 3 of the sealed case 2, and whose axis 4a is on the axis 5. 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 peripheral part 6a, and into which the outer peripheral part 8b is inserted and fixed into a cylindrical holding part 7a integrally formed with the support fitting 7. ing. 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 inside the sealed case 2 compresses the refrigerant,
Due to load fluctuations due to compression! Rotational vibration is generated around the axis 6 of the dynamic pressure line element, and the sealed case 2 vibrates due to the rotational vibration around the axis 6.

Therefore, the vibration on the axis 6 is the smallest and the vibration of the lid part 3 is the smallest at the axis position 3a.

Therefore, by attaching the refrigerant pipe 4 to the axial center position 3a of the lid and aligning the axial center 4a of the refrigerant pipe 4 with the axial center 6, the vibration of the refrigerant pipe 4 can be removed from other parts. It can be made smaller than when the refrigerant pipe 4 is attached, and the generation of noise caused by the vibration of the refrigerant pipe 4 can be suppressed.

Moreover, in this way, the refrigerant pipe 4 is placed at the axial center position 3a of the lid part 3,
By mounting the shaft center 4a so that it coincides with the shaft 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 cylindrical shape, the members are dense in the direction of rotation, making it difficult to lower the spring constant in the direction of rotation, and the load of the compressor is concentrated on the lower part 6C. Therefore, the lower part 6 of the vibration isolating support member 6
Since the amount of deflection of C is large, the hardness of the lower part 6C is high, and therefore the spring constant in the rotational direction is even higher.

Therefore, when the vibration of the compressor is high, it is difficult to sufficiently absorb the vibration of the refrigerant pipe 4 with the vibration isolating support member 6, and there is a problem that vibration of the refrigeration equipment body is generated and noise is generated. .

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. A substantially cylindrical or substantially cylindrical support leg whose axis and center axis are located near the path, and a plurality of support legs having a cylindrical outer edge and an inner edge, and further connecting these outer and inner edges. a vibration isolating support member made of an elastic material having radial lips only on approximately half the circumference and into which the support legs are inserted and fixed; and a holding portion that fixes the outer edge of the vibration isolating support member. It is equipped with a support fitting having a.

According to the above-described configuration, the present invention is provided with a support leg at a position between the axis and the path of the electric compression element, and this support leg is inserted and fixed into the inner edge of the vibration isolating member, and furthermore, this inner edge is connected to the outer edge. By connecting the rotary compressor with a lip, the rotary compressor is supported and fixed at the position with the least vibration, and the spring constant in the rotation direction is low, making the natural frequency in the rotation direction extremely low. It is possible to obtain a large vibration damping effect against rotational direction vibration, and by having lips that connect the outer edge and inner edge only on approximately half the circumference, the rotation type compressor is prevented by the lips being pulled together. It also prevents the natural frequency from increasing in the direction of the load, suppresses the vibrations of the refrigerant piping caused by the vibrations of the rotary compressor and the vibrations of the refrigeration equipment body, thereby suppressing the generation of noise.

EXAMPLE Hereinafter, the actual flow side of the support device for a rotary compressor of the present invention will be described with reference to the drawings. Incidentally, 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 not an elastic member and has a cylindrical inner edge 10a and an outer edge 10b, and a plurality of lips 10c extending in the radial direction from the inner edge 10a and the outer edge 1ob. Only the lower half is connected. 1
Reference numeral 1 denotes a support fitting, which is integrally molded with a cylindrical holding portion 11a, and is fixed to the support plate 12 by tightening with screws 13. In the rotary compressor 1, refrigerant pipes 4, which also serve as support legs provided on the shaft center 6 at two places on the left and right, are inserted and fixed into the inner edge 10a of the vibration-proof support member 1o. By inserting and fixing the outer edge portion 10b into the holding portion 11a of the support fitting 11, it is supported and fixed.

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

When the electric compression element in the closed case 2 compresses refrigerant, the rotary compressor 1 generates rotational vibration around the axis 6 of the dynamic pressure line element due to load fluctuation due to compression, and the closed case 2
vibrates mainly due to rotational vibration around the axis 5. Therefore, the vibration on the axis 6 is the smallest, and the vibration of the lid part 3 is the smallest at the axis position 3a. Therefore, by attaching the refrigerant pipe 4, which also serves as a support leg, to the axial center position 3a of the lid, and by aligning the axial center 4a of the refrigerant pipe 4 with the axial center 6, the vibration of the refrigerant pipe 4 is transmitted to other parts. It can be made smaller than when it is installed, and the refrigerant pipe 4
The noise caused by vibration can be suppressed to a minimum.

Furthermore, the vibration-proof support member 10 has an inner edge 10a and an outer edge 1o.
b and are connected by a lip 10c, and since the lip 10c is easily deformed in the direction of rotation, the inner edge 10a and the outer edge 1
The spring constant in the rotation direction between 0b and 0b is very low compared to the case where the inner edge 10a and the outer edge 10b are integrated, and by inserting and fixing the refrigerant pipe 4 into the inner edge 10a, the spring constant in the rotation direction It is possible to reduce the vibration frequency to an extremely low level, resulting in a large vibration-proofing effect.
The vibrations are transmitted to the support plate 12, and the generation of noise caused by the vibration of the support plate 12 can also be prevented.

Moreover, since the load of the rotary compressor 1 is supported and fixed by the lip 10a, the natural frequency in the load direction is lower than when the inner edge 10a and the outer edge 1ob are integrated.
In addition, if the lip 10c is provided only in the lower half and the lip 10c is also provided in the upper direction, the lip in the upper direction is pulled and the outer edge 1ob is deformed. The natural frequency in the load direction is slightly high,
As the vibration isolation effect in the load direction becomes slightly smaller, the vibration of the rotary compressor 1 is transmitted also in the load direction.
It is also possible to prevent an increase in noise due to vibration of the support plate 12. Furthermore, since the inner edge portion 10a has a cylindrical shape into which the entire refrigerant pipe 4 can be inserted, it is possible to prevent the refrigerant pipe 4 from falling off from the vibration isolating support member 1o during large vibrations such as during transportation. Since a stable vibration-proofing effect can be obtained, stable noise reduction in refrigeration equipment, etc. can be achieved.

Effects of the Invention As described above, the present invention provides an electric compression element that is provided at the end of a cylindrical sealed case and that is directly fixedly housed within the sealed case, with the axial center and central axis of the electric compression element located near the gap. It has a cylindrical or substantially cylindrical support leg, a cylindrical outer edge and an inner edge, and further has a plurality of radially extending lips connecting these outer and inner edges only at about half the circumference. and a vibration isolation support member made of an elastic material into which the support leg is inserted and fixed at the inner edge, and a support fitting having a holding part that fixes the outer edge of the vibration isolation support member. The device enables vibration isolating support with an extremely small amount of vibration transmission due to both the support effect at a position where vibration is small and the vibration isolating effect of the vibration isolating support member, and the vibration isolating support member has a lip only in approximately half direction. In addition, by increasing the vibration isolation effect in the load direction of the rotary compressor, we can suppress the generation of kiln noise caused by the vibration of the rotary compressor being transmitted to the refrigeration equipment body. By also preventing the rotary compressor from falling off the vibration-proof support member, stable noise reduction in refrigeration equipment, etc. 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
Figure 4 is a side view of a rotary compressor with the refrigerant piping of the support device installed, Figure 6 is a side view of the support device, and Figure 6 is a front view of a conventional rotary compressor support device. , FIG. 7 is a side view of the support device. 2... Sealed coos, 4... Refrigerant piping,
6...Axis center, 1o...Vibration isolation support member,
10a...Inner edge portion, 10b...Outer edge portion, 10c...Rip, 11...Support fitting, 11a...Holding portion. Name of agent: Patent attorney Toshio Nakao and 1 other person2-
Seedling closed case 4- Refrigerant v! ! 5- Axis IO- Vibration-proof support member L mountain - Inner wall 10b--j+ General Iα--Rep IJ--Document metal fittings 10-Ichibo Buntobusha Fig. 3 ll-0e, Case 5 between 2nd and i...-axis, XS Fig. 4!

Claims (1)

[Claims] A substantially cylindrical or substantially cylindrical 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 stored in the sealed case; It has a shaped outer edge and an inner edge, and further has a plurality of radially extending ribs connecting the outer edge and the inner edge only on approximately half the circumference, and the support leg is inserted and fixed into the inner edge. A support device for a rotary compressor, comprising a vibration-proof support member made of an elastic material and a support fitting having a holding part that fixes an outer edge of the vibration-proof support member.