CN1053477A - Rotary compressor - Google Patents

Abstract

A kind of sealed rotary compressor, the motor and the compressing mechanism that have seal container and be mounted in it.Rotary compressor has anechoic room, to reduce the noise level of the pressurized gas of discharging.Outlet valve is contained in bottom, silencing apparatus chamber.The silencing apparatus room cover plate has the fuel outlet that communicates with bottom, silencing apparatus chamber, it is being higher than through drain the oil groove or pipe on the plate on the height of lubricant level of container bottom and is being connected with vessel space, prevented that thus lubricant oil from holding that to stay silencing apparatus indoor, thereby avoided because pressurized gas is discharged into the noise that is produced in the lubricant oil that remains in the silencing apparatus chamber.Some embodiment of groove of draining the oil all designs for noise elimination function is provided.

Description

Rotary compressor

The present invention relates to the rotary compressor of the refrigeration plant of a kind of aircondition that is applicable to air regulator and so on and refrigerator and so on, relate to a kind of rotary compressor that compressing mechanism is contained in this pattern in the seal container more precisely.

Referring now to Figure 10 and Figure 11 the sealed rotary compressor of routine is described.

An one motor M and a compressing mechanism C are housed in housing 16, and this housing forms a seal container, utilizes a main support plate 4 that motor and compressing mechanism are kept apart mutually.End of bent axle 2 and the rotor 1a of motor M are coupled, and its other end is then passed main support plate 4 and stretched among the compressing mechanism C.Compressing mechanism C comprises a cylinder body 3 and a secondary support plate 5, and this pair support plate seals up the end of the cylinder chamber 3a in the cylinder body 3.The other end of cylinder chamber 3a then seals up with main support plate 4.The end of bent axle 2 the other end is to support with secondary support plate 5.That part of formation one eccentric part 2a on the bent axle 2 between main support plate 4 and secondary support plate 5.The roller 7 that plays the rolling piston effect is enclosed within on the eccentric part 2a rotationally.Blade 6 is slidably mounted in the blade groove 6a that processes in cylinder body 3, and like this, the top edge of blade is just done sliding contact with the external peripheral surface of roller 7.Roller 7 is to install like this, and promptly this roller will fully or seamlessly contact with the inner circumferential surface of cylinder chamber 3a, and it matches with cylinder chamber 3a and has formed a half moon-shaped space like this, and this space is separated into a suction chamber and a pressing chamber by blade 6.Blade 6 is reciprocating under the promotion of the rotation of the off-centre of roller 7.When roller 7 rotated in the mode of off-centre, the volume of suction chamber and pressing chamber changed, thereby will also compress immediately in the gas suction cylinder chamber 3a.

On the radially inner side of the outer periphery of secondary support plate 5 part, make a recess 9.Recess 9 usefulness one cover plate 10A covers to form a silencing apparatus chamber 11.An exhaust valve chamber 15 is formed at the bottom of silencing apparatus chamber 11, is holding an outlet valve 8 in it.In secondary support plate 5, make a relief opening 5a who is used to be communicated with cylinder chamber 3a and exhaust valve chamber 15, thereby the pressurized gas in the 3a of cylinder chamber can be discharged in the exhaust valve chamber 15 through relief opening 5a.This gas rises in the silencing apparatus chamber 11 subsequently, is discharged into then in the space 16a who accommodates motor M through intercommunicating pore 5b again.After this, gas just by a relief opening (not shown) by emitting in the container.

Lower end at cylinder body 3 forms a pump chamber 12, and the underpart of blade 6 movably is placed in this pump chamber.The volume of pump chamber 12 changes along with the to-and-fro motion of blade 6, holds the oil of staying housing 16 bottoms and is drawn in the pump chamber 12 thereby make.The oil that sucks is urged away from pump chamber 12, and through at cover plate 10A be contained in the eccentric part 2a that the oil circuit 14 that forms between the oil supply gallery cover plate 13 on the cover plate 10A is delivered to bent axle 2, so that the sliding position of lubricant pump.

The rotary compressor of above-mentioned pattern for example introduces to some extent in the patent application bulletin 63-230974 of examination at Japan Patent.

Above in the compressor of described prior art, when compressor was in off working state, because there is pressure difference in the gas in cylinder chamber 3a and housing 16, so lubricant oil just entered and is full of cylinder chamber 3a.When compressor starts was worked, the oil in the 3a of cylinder chamber just was discharged in the silencing apparatus chamber 11 and remains in the exhaust valve chamber 15.In the course of normal operation of compressor, pressurized gas is discharged in the oil that still remains in the exhaust valve chamber 15 through outlet valve 8, will produce noise (interference noise) like this.So, can a fuel outlet be set on silencing apparatus cover plate 10A usually, the oil that remains in the exhaust valve chamber 15 can emit by this fuel outlet, to prevent to produce such noise.

But, compressor started working and also oil after exhaust valve chamber 15 emits, the noise that is produced when gas is emitted by cylinder chamber 3a is disseminated in the space of housing 16 through fuel outlet, thereby produces higher levels of noise.This problem is not considered in the prior art.

Therefore, an object of the present invention is to provide and a kind ofly can eliminate the problems referred to above, and under low noise level, carry out the improved rotary compressor of work.

Compressor of the present invention comprises that its bottom stores the seal container of lubricant oil and is contained in sealing container interior motor and compressing mechanism, this compressing mechanism comprises a cylinder body that has the cylinder chamber in it, one is arranged in the cylinder body cylinder chamber and can be by the driving suction of motor and the rolling piston of pressurized gas, a silencing apparatus chamber that is used for reducing the pressurized gas noise level that emits by the cylinder chamber, an outlet valve that is arranged on bottom, silencing apparatus chamber, an oil supplying device of giving the sliding position supplying lubricating oil of moving link, this silencing apparatus chamber has a fuel outlet.This compressor also comprises the device that forms oil drain passage, and the space that this device makes fuel outlet and seal container is connected being higher than on the lubricated height by oil level.

In the present invention because the oil that emits from the cylinder chamber is after the rotary compressor starting, by the silencing apparatus chamber through the oil drain passage discharging, so there is not oil to be deposited in the silencing apparatus chamber.Therefore, avoid the generation of interference noise, otherwise when pressurized gas process outlet valve enters in the oil that remains in the silencing apparatus chamber, will produce noise.

By the description of being done with reference to the accompanying drawings, will be to above and other objects of the present invention, feature and advantage have more clearly to be understood.

Fig. 1 is first embodiment's of a sealed rotary compressor of the present invention sectional view;

Fig. 2 is the stereogram of secondary support plate shown in Figure 1;

Fig. 3 is the stereogram of silencing apparatus room cover plate shown in Figure 1;

Fig. 4 is the fuel feeding shown in Figure 1 and the stereogram of oil drain passage member;

Fig. 5 is the fuel feeding of a remodeling and the stereogram of oil drain passage member;

Fig. 5 A is contained in the fuel feeding of another remodeling on the silencing apparatus room cover plate and the planimetric map of oil drain passage member;

Fig. 5 B is along the sectional view in VB-VB cross section among Fig. 5 A;

Fig. 5 C is that the ratio at oil circuit outlet and the sectional area of oil drain passage is respectively under 1.4 and 0.7 condition test result plotted curve of noise frequency and noise level relation;

Fig. 6 to Fig. 9 is that expression is installed in the fuel feeding of the other remodeling on the silencing apparatus room cover plate and the stereogram of the logical member of oil extraction; With

Figure 10 and Figure 11 represent the stereogram of prior art compressor partial sectional view and its silencing apparatus room cover plate and fuel feeding road cover plate mounted thereto respectively.

With reference to Fig. 1 to Fig. 4 first embodiment of sealed rotary compressor is described below, the identical part in addition among the figure among used label and Figure 10 and Figure 11 adopts identical label, is repeated in this description avoiding.

The difference of first embodiment's the structure and the rotary compressor of prior art is: its silencing apparatus room cover plate 10 has oil-feed port 20-1 and 20-2, by this aperture supplying lubricating oil.Oil-feed port 20-1 be by the oil-feed port 5a that forms on the secondary support plate 5 just can with relevant position that pump chamber 12 is connected on process.Oil-feed port 20-2 processes in the position that the end with the bent axle of being supported by secondary support plate 52 is connected.

Silencing apparatus room cover plate 10 also has a fuel outlet 21 with sustained height position, exhaust valve chamber 15 lower end.

Oil-feed port 20-1 and 20-2 are interconnected by a fuel feeding and oil drain passage member 17, and 17 of this members are to make with the plate that an available welding or other similar approach are fixed on the silencing apparatus room cover plate 10.On one side of this fuel feeding and oil drain passage member 17 because of bump 18 that shaping groove produced.By bump 18 formed grooves oil-feed port 20-1 and oil-feed port 20-2 are communicated with.Reason for this reason, the represented groove that goes out of label 18 just is called " fuel feeding groove ".Also has a drain the oil groove 19 parallel on fuel feeding and the oil drain passage member with fuel feeding groove 18.Groove 19 is also made by stretch forming.In Fig. 4, the groove 19 of draining the oil is rendered as a bump on reverse side one side of member 17, and this bump is owing to form the result that the groove 19 of draining the oil is produced on a side of member 17.The lower end of groove 19 of draining the oil is connected with the fuel outlet 21 that forms on silencing apparatus room cover plate 10, and its upper end then is to open wide in the upper end of member 17.Because fuel feeding and oil drain passage member 17 are to be fixed on the outer surface of silencing apparatus room cover plate 10,, the fuel feeding groove 18 and the groove 19 of draining the oil form an oil supply gallery and an oil drain passage respectively so matching with the outer surface of cover plate 10.

Fuel feeding and oil extraction member 17 are arranged on the silencing apparatus room cover plate 10, thereby make the upper end of member 17 be positioned at accumulation above the oil level of the lubricant oil of the bottom, space of housing 16.Therefore, the drain the oil upper end of groove 19 is space open in the housing 16 on being higher than the height of lubricant level.

Sealed rotary compressor shown in Fig. 1 to Fig. 4 working method pressurized gas the same with the rotary compressor of routine.More particularly, after starting motor M, eccentric part 2a rotates the volume with suction chambers and pressing chamber in the change cylinder body 3, thereby causes the suction and the compression of gas (for example cooling gas).The to-and-fro motion of blade 6 is that the eccentric rotary of eccentric part 2a causes.

To-and-fro motion by blade 6, the fluid that pushes out in the pump chamber 12 flow through the oil-feed port 5a on the secondary support plate 5, the fuel feeding flute 18 on oil-feed port 20-1, fuel feeding and the oil drain passage member 17 on the silencing apparatus room cover plate 10, the oil-feed port 20-2 on silencing apparatus room cover plate 10 flow to the end of bent axle 2 then.

After compressor start, be disposed to fluid in the exhaust valve chamber 15 by cylinder chamber 3a through outlet valve 8, the fuel outlet 21 of flowing through enters in the groove 19 of draining the oil on fuel feeding and the oil drain passage member 17, and the pressure that utilizes exhausting air discharges fluid from the upper opening of the groove 19 of draining the oil.Because the groove 19 of draining the oil is very thin, in the course of normal operation of compressor, just avoided the noise emission that gas sent of discharging outside to compressing mechanism C by exhaust valve chamber 15.

As mentioned above, both made when compressor and be in the fluid that is filled in when quitting work state in the 3a of cylinder chamber, when working, compressor starts can be discharged in the exhaust valve chamber 15, both made in compressor operation, circuit fluid also can be discharged in the exhaust valve chamber 15 and go in compressor, these fluid can not rest in the exhaust valve chamber 15, but the upper end of the drain the oil groove 19 of fuel outlet 21 on fuel feeding and the oil drain passage member 17 of flowing through emits.

Like this, just eliminate in the prior art by exhausting air and remain in the interference noise that oil produced in the exhaust valve chamber 15, thereby guaranteed that compressor undisturbedly works.

Fig. 5 is the stereogram of an improved fuel feeding and oil drain passage member 17A.Adopt identical label to avoid repeated description with part in addition identical shown in Fig. 4.The 17A of member shown in Fig. 5 also can be used for Fig. 1 to rotary compressor shown in Figure 3.

In the fuel feeding and oil drain passage member 17A of remodeling shown in Figure 5, the groove 19A that drains the oil is crooked, thereby makes oil drain out 19a roughly towards substantially horizontal.The groove 19A that drains the oil is shaped like this, and promptly the embodiment with the front is the same as fuel outlet 21 coverings.

Second embodiment shown in Figure 5 also has such advantage except the advantage with first embodiment, promptly fluid is that oil drain out 19a from the groove 19A that drains the oil ejects, and the fluid that arrives silencing apparatus room cover plate 10 can not be back in the groove 19A that drains the oil.This has just guaranteed to give off reliably the fluid in the exhaust valve chamber 15.

Fig. 5 A illustrates another kind of improved fuel feeding and oil drain passage member 17B.In this remodeling, the oil drain out 19a of oil extraction groove 19B end forms like this, i.e. θ angle of the outer surface of the relative silencing apparatus room cover plate 10 of the axis of this oil drain out inclination is shown in Fig. 5 B.Like this, then the gas oily or that discharge that is sprayed through oil drain out 19a by oil extraction groove 19B is directly to spray towards the cylindrical portions may of housing 16 and the joint of its end wall portion.Because the attachment portion is the minimum positions of housing 16 vibrations, produces resonance so this organization plan can prevent the noise that this housing and oil drain out 19a are sent effectively.

Fig. 5 C is the sectional area S that is illustrated in oil circuit outlet 19a and the ratio S/S ' of the sectional area S ' of oil drain passage 19B is respectively under 1.4 and 0.7 the condition test result curve of noise frequency and noise level relation.As can be seen, ratio is that 0.7 o'clock noise level is lower from curve.This means, when the opening area of oil drain out 19a hour can more effectively be eliminated noise with respect to the cross sectional area of the groove 19B that drains the oil.

Fig. 6 illustrates another kind of modified model, and the fuel feeding groove 18 and the groove 19 of draining the oil all are to make by stretch forming on discrete plate 17-1 and 17-2 in this remodeling.These two plate 17-1 and 17-2 utilize welding or other similar approach to be separately fixed on the silencing apparatus room cover plate 10.Following attendant advantages so just is provided, and promptly the fuel feeding groove 18 and the groove 19 of draining the oil separate to each other reliably.

Fig. 7 illustrates another modified model, replaces plate 17-2 shown in Figure 6 with pipe 17-3 in this structure.The lower end of this pipe 17-3 is connected with the fuel outlet 21 that forms on silencing apparatus room cover plate 10.The upper end portion of pipe is to the substantially horizontal bending.Oil drain out 19a is opening wide at the end of pipe 17-3 curved section.In this remodeling, fuel feeding groove 18 separates each other fully with the oil drain passage that is formed by pipe 17-3, as the situation of embodiment shown in Figure 6.

Fig. 8 illustrates another improvement project to fuel feeding shown in Fig. 5 and oil drain passage member.Fuel feeding and oil drain passage member 17c have a fuel feeding groove 18 and the groove 19c that drains the oil as above-mentioned each embodiment.The intermediate portion of groove 19c of draining the oil be dilate dilate cavity 19c-1 so that form one.In this embodiment, the intermediate portion of groove has than the bigger cross sectional area of entrance and exit part owing to drain the oil, and then the noise that is sent by the fuel outlet of making on silencing apparatus room cover plate 10 21 will obtain eliminating reliably further because of the bulking effect that dilates chamber 19c-1 and the choking effect of oil drain out 19a.

Fig. 9 illustrates the another one improvement project, to the intermediate portion of the similar groove 19A that drains the oil shown in Figure 5, is connected with a resonant cavity 19D by a neck 19E in this structure.The same with the situation of each embodiment noted earlier, the groove 19A that drains the oil, neck 19E and resonant cavity 19D and fuel feeding groove 18 are all made by stretch forming on a fuel feeding and oil drain passage member 17D.In this embodiment, because neck 19E and resonant cavity 19D constitute a resonator muffler, so the noise of characteristic frequency is fallen in damping greatly.Therefore, the noise that is sent by fuel outlet 21 and oil drain out 19 also just can weaken widely.

Should be understood that by above description, owing to be provided with oil outlet passage, got rid of lubricant oil and held and stay in the outlet valve cavity, thereby prevented the noise that between the gas of residual lubricant oil and discharging, produced because of the phase mutual interference.In addition, because oil drain passage also has the ability of eliminating noise, therefore the noise level that gas produced that sprays in the space in the housing by oil drain passage in the compressor course of normal operation can weaken widely.

Claims (20)

1, a kind of rotary compressor, it comprises:

A seal container is storing lubricant oil in its bottom;

A motor and a compressing mechanism, the both is contained in the sealing container,

The above-mentioned compressor structure comprises: a cylinder body that has the cylinder chamber, a rolling piston, this piston is arranged in the above-mentioned cylinder chamber and can sucks and pressurized gas under the driving of above-mentioned motor, a silencing apparatus chamber, be used to reduce the noise of the pressurized gas that gives off by above-mentioned cylinder chamber, an outlet valve that is arranged on bottom, above-mentioned silencing apparatus chamber, supply the oil supplying device of above-mentioned lubricant oil with a slide member of giving movable link, above-mentioned silencing apparatus chamber has the oil drain canal device that a fuel outlet and form oil drain passage, and the space that this oil drain passage makes above-mentioned fuel outlet and above-mentioned seal container is connected being higher than on the height of above-mentioned lubricant level.

2, rotary compressor according to claim 1 is characterized in that: described compressing mechanism also comprises: a bent axle, this bent axle are used for supporting rotationally and driving the above-mentioned rolling piston that is positioned at the cylinder chamber; First and second support plates are in order to seal the two end part in above-mentioned cylinder chamber; A blade is mounted slidably in the blade groove that forms in above-mentioned cylinder body, and the eccentric rotary by above-mentioned rolling piston makes above-mentioned blade reciprocating; And pump chamber, the volume of pump chamber changes along with the to-and-fro motion of above-mentioned blade underpart, thereby play the effect that sucks and discharge above-mentioned lubricant oil, described silencing apparatus chamber is to form between one of above-mentioned first and second support plates and that are made the anechoic room cover plate of above-mentioned fuel outlet within it, above-mentioned silencing apparatus room cover plate also has an oil-feed port that is connected with above-mentioned pump chamber, the underpart of above-mentioned oil drain canal device is connected with above-mentioned fuel outlet, and its upper end portion is that the space open in the above-mentioned seal container on being higher than the height of above-mentioned lubricant level, and the lubricant oil of being discharged by above-mentioned oil-feed port is delivered on the lubricant housings by the oil supply gallery device.

3, rotary compressor according to claim 2 is characterized in that: described oil drain canal device comprises a groove of draining the oil that forms on a plate, this plate is installed on the outer surface of above-mentioned silencing apparatus room cover plate.

4, rotary compressor according to claim 3 is characterized in that: described oil supply gallery device comprises a fuel feeding groove that forms on above-mentioned plate.

5, rotary compressor according to claim 3 is characterized in that: described oil supply gallery device comprises a fuel feeding groove that forms on another plate, this plate is installed on the outer surface of above-mentioned silencing apparatus room cover plate.

6, rotary compressor according to claim 2 is characterized in that: described oil drain canal device comprises a pipe fitting that is installed on the above-mentioned silencing apparatus room cover plate outer surface.

7, rotary compressor according to claim 6 is characterized in that: described oil supply gallery device comprises a fuel feeding groove that forms on a plate, this plate is installed on the outer surface of above-mentioned silencing apparatus room cover plate.

8, rotary compressor according to claim 3 is characterized in that: the top of the described groove of draining the oil is crooked with respect to its underpart, and roughly stretches out towards substantially horizontal.

9, rotary compressor according to claim 6 is characterized in that: the top of described pipe fitting is crooked with respect to its underpart, and roughly stretches out towards substantially horizontal.

10, rotary compressor according to claim 2 is characterized in that: the axis of the opening of described oil drain canal device upper end portion is one less than 90 ° of angles stretching, extensions with respect to above-mentioned silencing apparatus room cover plate.

11, rotary compressor according to claim 2 is characterized in that: the area of the opening of described oil drain canal device upper end portion is less than the cross sectional area of this oil drain canal device.

12, rotary compressor according to claim 8, it is characterized in that: the opening of described oil drain canal device upper end portion comprises an oil drain out that forms at the terminal part on above-mentioned oil extraction groove top, described oil drain out is to form like this, and promptly the axis of this oil drain out is upwardly extending less than the side at 90 ° of angles with respect to above-mentioned silencing apparatus room cover plate.

13, rotary compressor according to claim 8 is characterized in that: the area of described oil drain out is less than above-mentioned 70% of the trench cross-section area of draining the oil.

14, rotary compressor according to claim 2 is characterized in that: muffler is arranged on the underpart of above-mentioned oil drain canal device and between the formed opening in its upper end portion.

15, rotary compressor as claimed in claim 3 is characterized in that: silencing apparatus is arranged on the entry port of the above-mentioned groove of draining the oil and between the formed opening in its upper end portion.

16, rotary compressor according to claim 15 is characterized in that: partly have one dilates the chamber to the described groove of draining the oil therebetween, and this dilates the chamber and forms above-mentioned muffler.

17, rotary compressor according to claim 15 is characterized in that: described muffler comprises a resonant cavity that forms on above-mentioned plate, and this resonant cavity is connected with the intermediate portion of the above-mentioned groove of draining the oil by a neck.

18, rotary compressor according to claim 2, it is characterized in that: described oil drain canal device comprises a groove of draining the oil that forms on a plate, this plate is installed on the outer surface of above-mentioned silencing apparatus chamber device, described oil supply gallery device comprises a fuel feeding groove that forms on above-mentioned plate, described muffler is arranged on the entry port of the above-mentioned groove of draining the oil and between the formed opening in its upper end portion.

19, rotary compressor according to claim 18 is characterized in that: partly have one dilates the chamber to the described groove of draining the oil therebetween, and this dilates the chamber and forms above-mentioned muffler.

20, rotary compressor according to claim 18 is characterized in that: described muffler comprises a resonant cavity that forms on above-mentioned plate, and this resonant cavity is connected with the intermediate portion of the above-mentioned groove of draining the oil by a neck.

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