CN1884829A

CN1884829A - Compressor

Info

Publication number: CN1884829A
Application number: CNA2006100946339A
Authority: CN
Inventors: 金秉炫
Original assignee: Samsung Gwangju Electronics Co Ltd
Current assignee: Samsung Electronics Co Ltd
Priority date: 2005-06-21
Filing date: 2006-06-20
Publication date: 2006-12-27
Also published as: ITTO20060456A1; BRPI0602343A; US20060292023A1; JP2007002847A; KR100643195B1

Abstract

A compressor having a structure for reducing vibration and noise from an internal structure is disposed. The compressor includes a sealed case, an internal structure having a driving part disposed in the sealed case for generating a driving force to compress a fluid, and a compressing part disposed in the sealed case for compressing the fluid, and a weight attached to the sealed case having a predetermined mass to reduce vibration and noise generated by the internal structure. Since there is no need to newly manufacture the sealed case or to add an absorber for the purpose of reducing vibration and noise from an already assembled compressor, time and costs are also saved.

Description

Compressor

Technical field

The present invention relates to a kind of compressor, more particularly, relate to a kind of can reducing from the vibration of compressor inner structure and the compressor arrangement of noise.

Background technique

Usually, compressor comprises: driver part, described driver part utilize the electricity interaction rotation between stator and the rotor to be fixed in the running shaft of rotor to produce driving force; Utilize the compression member of driving force compressed fluid; And capsul, described capsul is used for protection such as likes such as driver part, compression member, and forms the shell of compressor.Compressor is divided into reciprocating-type compressor, revolution type compressor and Scrawl compressor.

Fig. 1 has shown an example of the reciprocating-type compressor in the above-mentioned compressor.As shown in fig. 1, reciprocating-type compressor comprises: the capsul 1 with predetermined inner space; Driver part 2, described driver part 2 are installed in the capsul 1 to produce driving force; With the compression member 3 that is used for compressed fluid.Capsul 1 constitutes by upper casing 1a is connected with lower casing 1b.

In this compressor, when driver part 2 produces driving force, when driving force is compressed parts because of compression and consumes, and be compressed and the fluid that compresses when being discharged from when fluid, a large amount of vibrations and noise are produced, and some of described vibration and noise can be eliminated by shock arrester (-tor) and noise absorption device.

Yet when the speed of rotation of running shaft in the compressor increased gradually, the frequency of the vibration that the internal structure of compressor produces may become the same with the natural frequency of capsul, causes resonance state, thereby vibration and noise are maximized.

When vibration and noise are passed to compressor outside, to user's influence increase, and the life-span of compressor be shortened.

In addition, the vibration and the noise of the compressor that assembles in order to reduce to control oneself, new capsul adopts material and the shape different with the capsul that assembles compressor to make, and perhaps independent vibration absorber is connected to and assembles compressor.Yet, those complicated layout, consuming time and cost is huge.

Summary of the invention

Consider the problems referred to above and make the present invention, an aspect of of the present present invention provides a kind of compressor, wherein the natural frequency of capsul is changed to prevent the resonance of compressor, even and when compressor rotates with high rotating speed, also can prevent vibration and noise maximization, and can reduce simply to come oneself to assemble the vibration and the noise of compressor.

According on the one hand, the invention provides a kind of compressor, comprising: capsul; Internal structure, described internal structure have to be arranged on and are used to produce driving force in the capsul with the driver part of compressed fluid with in order to the compression member of compressed fluid; With the weight part, described weight part is arranged in the capsul and has predetermined quality to reduce vibration and the noise that internal structure produces.

Preferably, the weight part comprises: neck, and described neck extends and is bent from the contact segment of contact seal shell; And free end portion, described free end portion is bent and is formed by neck, and separates with capsul.

Free end portion preferably is bent, and its part preferably is welded in capsul.

And the weight part can have predetermined area, and is fixed in the internal surface or the outer surface of the downside of capsul.

Neck preferably is provided with spring, and the weight part can have the welding portion that will be welded in capsul by spot welding, and neck is thinner than free end portion.

In conjunction with those and other purpose, advantages and features of the invention can become obviously hereinafter, and the following detailed description of the invention of character reference of the present invention, appended claim and several appended accompanying drawings can more clearly be understood.

Description of drawings

Fig. 1 is the viewgraph of cross-section that has shown existing compressor;

Fig. 2 is the partial cross-sectional view of lower casing of compressor of weight part that shown connection according to a preferred embodiment of the invention;

Fig. 3 is several partial cross-sectional view of the weight part of compressor according to a preferred embodiment of the invention, and wherein Fig. 3 a, 3b, 3c and 3d have shown according to of the present invention first, second, third and the diagrammatic sketch of the part of weight separately of the 4th embodiment's compressor;

Fig. 4 is the diagrammatic sketch of inside of lower casing that has connected the compressor of weight part, and wherein Fig. 4 a has shown the weight part among Fig. 3 a, and Fig. 4 b has shown the weight part shown in Fig. 3 d; With

Fig. 5 is the diagrammatic sketch of the frequency response curve of noise in according to a preferred embodiment of the invention the compressor, and wherein Fig. 5 a has shown the frequency response curve when 2880rpm, and Fig. 5 b has shown the frequency response curve when 3480rpm.

Embodiment

Hereinafter describe the preferred embodiments of the present invention with reference to the accompanying drawings in detail.

Fig. 2 has connected the partial cross-section sectional view that is used to reduce to vibrate with the compressor lower casing of the weight part of noise according to the preferred embodiment of the invention.Fig. 4 has shown the structure of the compressor with weight part, wherein is used to reduce to vibrate the internal surface that is connected to the lower casing of compressor with the described weight part of noise.Fig. 3 shown according to a preferred embodiment of the invention be used to reduce to vibrate each structure with the weight part of noise in order to installation, wherein Fig. 3 a, 3b, 3c and 3d have shown the of the present invention first, second, third and the 4th preferred embodiment respectively.

As shown in Figure 2, compressor according to a preferred embodiment of the invention comprises the capsul 10 with predetermined inner space.Capsul 10 comprises capsul (not shown) and lower seal shell 10b.Owing to be installed on the same with those structures of traditional compressor in the capsul 10, so omitted internal structure among the figure such as internal structures such as driver part (not shown) and compression member (not shown)s.

At this, compressor comprises reciprocating-type compressor, revolution type compressor and Scrawl compressor.When compressor that being compressed in of fluid wherein is performed was located in the inner space of lower casing 10b, the downside of lower casing 10b produced huge vibration and noise.Reason is that the big change owing to centrifugal rotation that produces between the fluid compression period and pressure makes vibration and noise by concentrated.

Fig. 3 a has shown compressor according to a first advantageous embodiment of the invention.Weight part 50 with predetermined quality is fixed in the internal surface of the downside of lower casing 10b by spot welding.Herein, the spot welding position is called as welding portion 51.

Fig. 3 b has shown another diagrammatic sketch of compressor according to a second, preferred embodiment of the present invention.Weight part 50 is fixed in the outer surface of the downside of lower casing 10b by spot welding.

Simultaneously, first preferred embodiment of the present invention as shown in Fig. 3 a and 3b and second preferred embodiment be can adopt simultaneously and the outer surface and the internal surface of the downside of lower casing 10b weight part 50 are fixed to.

Fig. 3 c has shown the another diagrammatic sketch of compressor according to a first advantageous embodiment of the invention.Weight part 50 is fixed in the internal surface of the downside of lower casing 10b by spot welding.Weight part 50 has: neck 53, and described neck 53 is by extending also crooked with the tight contact segment 52 that lower casing 10b closely contacts and forming; And free end portion 54, described free end portion 54 forms by curved neck 53.Some of free end portion 54 are bent and are welded to lower casing 10b.In this welding, spot welding is also nonessential.For neck 53, in order to increase the efficient of suppression of vibrations, spring 55 is installed in the outside of neck 53.Neck 53 is enough thin, so that neck 53 can be with spring 55 as elastomer.

Fig. 3 d has shown a diagrammatic sketch more according to a first advantageous embodiment of the invention.Weight part 50 is fixed in the internal surface of the downside of lower casing 10b by spot welding.Weight part 50 has: neck 53, and described neck 53 is extended by tight contact segment 52 and bending forms; And free end portion 54, described free end portion 54 is formed by curved neck 53.Free end portion 54 separates with lower casing 10b, and spring 55 is to be installed in the outside of neck 53 with the same way as shown in Fig. 3 c.

Hereinafter, with describe in detail according to a preferred embodiment of the invention be used for reducing the vibration of compressor and the operation of noise.

If the natural frequency of capsul was set to f when the vibration that causes when the internal structure of compressor was passed to capsul, then natural frequency f can be expressed as following formula:

f = \frac{1}{2 π} \sqrt{\frac{k}{m}} - - - (1)

At this, k represents the rigidity of capsul, and m represents the quality of capsul.In other words, natural frequency can be lowered by the quality that increases capsul.When natural frequency f reduced, the result was that the frequency of the vibration that internal structure produces increases caused resonance and can be avoided.In other words, to capsul, the natural frequency of capsul reduces by the part of gaining in weight, and the frequency of the vibration that the inside of compressor produces may become the same with the natural frequency of capsul, because in this case, vibration and noise can be very not high, and be therefore unimportant.When compressor during with the rotation of high rotating speed, resonance phenomenon can be avoided, though and the frequency of the vibration that produces in the compressor be high, vibration can reduce when the high rotating speed of compressor.

Therefore,, the vibration that is produced during with high rotating speed rotation at compressor is reduced, and need not to make again capsul or increase vibration absorber to assembling compressor by erection weight part simply.

Simultaneously, because surrounding atmosphere is also vibrated when vibration takes place, so sound wave is produced.Sound wave becomes noise when the intensity of sound wave increases.Because the energy that vibration causes and the intensity I of sound are proportional, and being in proportion of the intensity I of sound and noise, and owing to by preventing to produce resonance at according to a preferred embodiment of the invention compressor during with high rotating speed rotation vibration is reduced, therefore vibration and noise are reduced simultaneously.

Fig. 5 a and 5b have shown when the weight part is installed in according to the compressor of first preferred embodiment of the invention and compressor respectively with the high rotating speed rotation of 2880rpm and 3480rpm, with respect to the frequency response curve of the noise of being surveyed at the 10KHz frequency band.In the drawings, dotted line is represented the frequency response curve of traditional compressor, and the solid line representative is according to the frequency response curve of the compressor of first preferred embodiment of the invention.As can finding out from the experimental result as shown in Fig. 5, according to a first advantageous embodiment of the invention compressor has improvement faster than the high rotating speed of 2800RPM time the noise reduces.

Equally, the weight part 50 among Fig. 3 d has the structure that is used for more effectively absorbing that produce and the vibration that be passed to capsul of internal structure, and execution and the similar function of a kind of vibration absorber.In other words, capsul becomes first mass (massive body), neck 53 and spring 55 are as the device that applies elastic force, and free end portion 53 is as second mass, make the vibration that is passed to capsul only vibrate free end portion 54, thereby and disappear by neck 53 and spring 55.Therefore, excitation force is applied to capsul and is delivered to the weight part from the internal structure of compressor.Because excitation force only makes the free end portion vibration, so it is converted into kinetic energy or heat energy also disappears, and the result is that vibration is absorbed and depressed motive sealing shell.

As a result, by using weight part, can reduce vibration and noise significantly according to compressor of the present invention as showing among Fig. 3.

As mentioned above, according to compressor of the present invention,, can reduce vibration and noise from the compressor internal delivery to the outside by the part of gaining in weight with simple structure.And, even when vibration that reduces to come own assembling compressor and noise, owing to need not to make again capsul or increase vibration absorber, so compressor of the present invention has advantage on time and cost.

It is emphasized that the above embodiment of the present invention, more specifically, arbitrary preferred embodiment only is the possible example of mode of execution, only for being expressly understood that principle of the present invention is illustrated.Not deviating under the situation of the spirit and principles in the present invention substantially, can make many variations and modification to the embodiments of the invention of above explanation.All such modifications and variation all are included among the disclosure and the scope of the present invention and by following claim to be protected.

Claims

1. compressor comprises:

Capsul, described capsul forms internal structure, and described internal structure comprises and is arranged in the capsul and is suitable for producing the driver part of the driving force that is used for compressed fluid and is suitable for the compression member of compressed fluid; With

The weight part, described weight part is connected to capsul and has predetermined quality, and wherein wt spare reduces vibration and the noise that internal structure produces.

2. compressor according to claim 1, wherein, described weight part has predetermined area, and is connected to the internal surface of the downside of capsul.

3. compressor according to claim 1, wherein, described weight part has predetermined area, and is connected to the outer surface of the downside of capsul.

4. compressor according to claim 1, wherein, the part of described weight part is welded in capsul by spot welding.

5. compressor according to claim 1, wherein, operating weight spare when compressor rotates with the high rotating speed faster than 2800RPM, thus vibration and noise reduced.

6. compressor comprises:

The weight part, described weight part is connected to capsul and has predetermined quality, is used to reduce vibration and the noise that internal structure produces, and described weight part comprises:

Neck, described neck extends from the contact segment of contact seal shell, and wherein neck is bent; With

Free end portion, described free end portion are formed by curved neck and separate with capsul.

7. compressor according to claim 6, wherein, described weight part has predetermined area, and is connected to the internal surface of the downside of capsul.

8. compressor according to claim 6, wherein, described weight part has predetermined area, and is connected to the outer surface of the downside of capsul.

9. compressor according to claim 6 also comprises the spring that is provided with near neck.

10. compressor according to claim 6, wherein, the part of described weight part is welded in capsul by spot welding.

11. compressor according to claim 6, wherein, operating weight spare when compressor rotates with the high rotating speed faster than 2800RPM, thus vibration and noise reduced.

12. compressor according to claim 6, wherein, described neck is thinner than free end portion.

13. a compressor comprises:

Capsul;

Internal structure, described internal structure have at least to be arranged on and are used to produce driving force in the capsul with the driver part of compressed fluid be used for the compression member of compressed fluid; With

The weight part, described weight part is connected to capsul and has predetermined quality, and wherein wt spare reduces vibration and the noise that internal structure produces, and wherein wt spare comprises:

Free end portion, described free end portion is formed by curved neck, and wherein free end portion and capsul separate, and wherein free end portion is bent and its part is welded in capsul.

14. compressor according to claim 13, wherein, described weight part has predetermined area, and is connected to the internal surface of the downside of capsul.

15. compressor according to claim 13, wherein, described weight part has predetermined area, and is connected to the outer surface of the downside of capsul.

16. compressor according to claim 13 also comprises the spring that is provided with near neck.

17. compressor according to claim 13, wherein, the contact segment of described weight part is welded in capsul by spot welding.

18. compressor according to claim 13, wherein, operating weight spare when compressor rotates with the high rotating speed faster than 2800RPM, thus vibration and noise reduced.

19. compressor according to claim 13, wherein, described neck is thinner than free end portion.