CN100532853C - Muffler of closed type rolling rotor compressor - Google Patents

Abstract

The invention discloses a compressor silencer with baffle plate, which comprises the following parts: top bearing, rotary shaft through axial center and silencer with air-outlet hole on the top bearing, wherein the silencer is set as single layer baffle plate on the inner side of silencer, which keeps certain gap between baffle plate central hole and rotary shaft. The invention improves the noise absorption effect and simplifies the manufacturing craft, which saves the raw material.

Description

The silencing apparatus of closed type rolling rotor compressor

Technical field

The present invention relates to a kind of compressor, particularly improve the silencing apparatus of the closed type rolling rotor compressor of compressor muffler structure.

Background technique

Fig. 1 is the plan view of existing compressor muffler, and the silencing apparatus of representing among the figure is used for the closed type rolling rotor rotary compressor.Rotary compressor has airtight casing, the stator of rotary compressor motor and rotor are installed in the top of casing, the rotor center fixed has eccentric shaft, the cylinder of compressor body is positioned at the bottom of airtight casing, the eccentric part that eccentric shaft is arranged in the cylindrical cylinder hole of cylinder block central authorities, on the external cylindrical surface of eccentric part rolling rotor is arranged, when eccentric part carries out the circular movement rotation with eccentric shaft in cylinder-bore, the rolling rotor compression enters the gaseous coolant in the cylinder block, also has the height of separation in the cylinder block, the baffle plate (not shown) of low pressure area refrigerant, on the cylinder block, the lower end surface is fixed with blanket gas cylinder body end face, and supports the upper bearing and the lower bearing of eccentric shaft rotation.

There is sucking pipe side at airtight casing, and sucking pipe enters in the pressing chamber of compressor cylinder block refrigerant.The drain tap (not shown) is installed on the upper-end surface of upper bearing, drain tap is discharged to the pressing chamber of refrigerant by cylinder block in the silencing apparatus, again by being discharged in the silencing apparatus in the airtight casing, there is outlet pipe the top of airtight casing, and outlet pipe enters the refrigerant in the airtight casing circulatory system of refrigerant.

After the rolling rotor rotary compressor of said structure is connected power supply, rotor rotation in the airtight casing, make the rotation of eccentric shaft and rolling rotor, compression enters the refrigerant of cylinder block in cylinder block, when the refrigerant in the pressing chamber reaches certain pressure, the drain tap that is installed in the upper bearing upper-end surface is opened, compressed refrigerant enters silencing apparatus, pore through silencing apparatus enters in the closed shell again, when the pressure of pressing chamber descends, drain tap is closed, and prevents that refrigerant from refluxing, and at this moment compressor is in the state that sucks refrigerant.

Silencing apparatus 1 is installed in the top of upper bearing, silencing apparatus is the thin-walled case, profile is the middle porose oblate cylindricality of ring-type, the inner cavity that forms annular, lower openings, cover on the upper bearing top, penetrate the necked part of upper bearing in the hole in the middle of the silencing apparatus, silencing apparatus 1 is screwed on upper bearing.The upper-end surface of silencing apparatus and upper bearing surrounds cavity, internal layer silencing apparatus and outer silencing apparatus are equipped with in its inside, after being positioned at refrigerant that the drain tap of upper bearing upper-end surface discharges and entering the cavity of silencing apparatus, through inside and outside layer silencing apparatus, the exhaust port by silencing apparatus enters in the airtight casing.

When compressor operating, the switching that reaches drain tap of flowing of gaseous coolant all can cause very strong impact noise, and very wide frequency domain is arranged, it is the main noise source of compressor, the switching that reaches drain tap of flowing of gaseous coolant all can cause very strong impact noise, the identical five lobe type structures that are of the shape of silencing apparatus, not only processing inconvenience, waste material, and the inner space of outer silencing apparatus is less, carries out noise reduction by the expansion volume, and erasure effect is bad, especially to the noise of particular frequency bands, erasure effect is poorer.

Summary of the invention

At the deficiency on the acoustic wave filter structure in the prior art, the purpose of this invention is to provide change silencing apparatus internal structure, increase dividing plate, make noise stream lengthening, improve the silencing apparatus of the closed type rolling rotor compressor that reduces noise result.

For achieving the above object, technological scheme of the present invention provides a kind of compressor muffler with dividing plate, include compressor upper bearing, pass the running shaft in its axle center and be fixed on upper bearing top by the silencing apparatus that has exhaust port, wherein: described silencing apparatus is that individual layer adds the dividing plate setting, dividing plate is arranged on the position of silencing apparatus inboard, is provided with spacing between the center hole of dividing plate and the running shaft.

Effect of the present invention is that the silencing apparatus of this band dividing plate has prolonged air-flow and flows through the path in the institute of internal layer silencing apparatus, and the dividing plate place carries out exhaust along the spacing that is provided with between center hole and the running shaft, contact tightly between this silencing apparatus and the running shaft, has improved noise reduction.And simplified processing process, and save material.

Description of drawings

Fig. 1 is the plan structure figure of existing compressor muffler;

Fig. 2 is the sectional drawing of compressor muffler of the present invention;

Fig. 3 is the partial enlarged drawing of Fig. 2.

Embodiment

Reaching embodiment in conjunction with the accompanying drawings is illustrated the silencing apparatus of closed type rolling rotor compressor of the present invention.

Fig. 2 is the sectional drawing of compressor muffler of the present invention, and Fig. 3 is the partial enlarged drawing of Fig. 2.As shown in the figure, the structure of the silencing apparatus of closed type rolling rotor compressor of the present invention include compressor upper bearing, pass the running shaft in its axle center and be fixed on upper bearing top by the silencing apparatus that has exhaust port, described silencing apparatus is that individual layer adds the dividing plate setting, dividing plate 2 is arranged on the position of silencing apparatus inboard, is provided with spacing between the center hole of dividing plate 2 and the running shaft.Be preferably in silencing apparatus middle inside position dividing plate is set.

The silencing apparatus of closed type rolling rotor compressor of the present invention is achieved in that

The present invention at first changes former silencing apparatus on the structure and adds baffle plate device for adopting individual layer, adopts resistance welding technology, and dividing plate 2 is arranged in the silencing apparatus on the lateral circle surface medium position.According to compressor specification difference, the spacing between the center hole of set dividing plate 2 and the running shaft each not mutually one.

Existing silencing apparatus is to belong to anti-formula silencing apparatus, and what it utilized is the principle of the expansion chamber of magnetic tape trailer pipe.In theory, the following calculating of its sound deadening capacity:

$\mathrm{\ΔL}=10\lg [1+\frac{1}{4}{(m-\frac{1}{m})}^2{\sin }^2\left(\mathrm{kl}\right)]$ M: divergence ratio, $m=\frac{S2}{S1}$

From top formula as can be seen, the size of silencing apparatus sound-damping qualities is decided by expansion ratio.Therefore the present invention increases a dividing plate in the inside of silencing apparatus, and it is become secondary expanssion type silencing apparatus, and its noise reduction can obviously improve.

Claims (1)

1, a kind of compressor muffler with dividing plate, include compressor upper bearing, pass the running shaft in its axle center and be fixed on upper bearing top by the silencing apparatus that has exhaust port, it is characterized in that: described silencing apparatus is that individual layer adds the dividing plate setting, dividing plate is arranged on the position of silencing apparatus inboard, is provided with spacing between the center hole of dividing plate and the running shaft.

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