CN85105091A - Rotary compressor - Google Patents

Abstract

The discharge gas that is compressed with compressor main body is cooled off by the thermodiffusion of heat exchanger, and thereafter, it turns back to compressor again.When lubricant oil aspirates under the pressure of discharge gas, also be cooled.Discharge gas set the method by making to be cooled by the there, each constituent elements of cooling compressor main body and motor, thus the temperature rise of whole compressor is suppressed.

Description

Rotary compressor

The present invention relates to rotary compressor, and especially relevant a kind of compressor, wherein compressor main body is placed in the container of sealing, and makes that the lubricated lubricant oil of compressor main body is the inner bottom part that is stored in container.

This compressor main body is placed on seal container the inside, conventional rotary compressor is such formation.Compressor main body is with above-mentioned the same manner, and motor in the seal container drives by being placed on, and along with the driving of compressor main body, the lubricant oil that is stored in the seal container inner bottom part is supplied with each slide member of compressor main body.

Yet, in such rotary compressor, being accompanied by the driving of compressor main body, each slide member will produce heat, and under certain conditions, heat that leaves and generation and the heat irrelevancy weighing apparatus that increases.Especially, powerful compressor, such shortcoming is arranged, it is very big that the heat that it produced can become, surpass the heat that leaves when the heat that produces, the temperature of whole compressor will improve, the consequence of having brought compressor performance to reduce like this, in more detail, its shortcoming is when the temperature of whole compressor rises, and the overheated of suction port taken place, the sealability of lubricant oil reduces, the oil film support force of lubricant oil reduces, and each insulating material of motor damages or the like, and the operational reliability of compressor reduces thereupon.

The objective of the invention is to improve the intrinsic shortcoming of rotary compressor of routine just as described above, and provide a kind of rotary compressor that has improved, it has the temperature that successfully reduces whole compressor and raises, discharge gas as the cooled gas of compressor main body compression keeps its characteristic coefficient, this discharge gas supplying lubricating oil or its produce the parts of heat, so that cool off these parts.

In general, according to the formation that the invention provides rotary compressor, the main body of one of them compressor is installed in the seal container, thereby make the lubricated lubricant oil of compressor main body be stored in the inner bottom part of seal container, described rotary compressor is characterised in that provides cooling unit to cool off compressed discharge gas, provide simultaneously to be fed in the pipeline that constitutes in some way and go, thereby make the stationary part that passes through the motor of compressor main body by the discharge gas of above-mentioned cooling unit cooling.

On the other hand, according to the present invention, it provides a kind of structure of rotary compressor, wherein the main body of compressor is to be assembled in the seal container, lubricant oil to the compressor main body lubricate is the bottom that is stored in seal container, this rotary compressor is characterised in that it provides cooling unit to cool off compressed discharge gas, and in the compression unit that constitutes compressor main body, except that bent axle.At least some constitutes a pipeline, return the seal container from cooling unit so that discharge gas, thereby it is passed through, when discharging gas directly with the inner and outer wall contact of described unit, other parts or main bearing or step bearing, be arranged on the two ends of cylinder, as compression member, and it is bearing on the running shaft of piston, in the pressing chamber of cylinder, to carry out the off-centre rotation, above-mentioned pipeline is made of groove between two holes of passing bearing and a shaping, in some sense, so that two holes are connected with cylinder exchange ground in the surface of the tight contact of bearing.

These above-mentioned purposes, some other purpose will especially when arising to consider together with corresponding accompanying drawing one, will become apparent with more intelligible from the situation of following detailed description not according to the special structure and the operation of rotary compressor of the present invention.

Fig. 1 is the sectional view of expression according to the rotary compressor of first embodiment work of the present invention.

Fig. 2 is the sectional view that the compressor of presentation graphs 1 cuts the critical piece of the compressor after the part.

Fig. 3 is the sectional view of expression according to the rotary compressor of second embodiment work of the present invention.

Fig. 4 is the front elevation of the step bearing of expression compressor shown in Figure 3.

Fig. 5 is along the longitudinal cross-section view shown in Fig. 4 V-V line.

Fig. 6 is the longitdinal cross-section diagram of expression according to the rotary compressor of third embodiment of the invention work.

Then, rotary compressor of the present invention is explained especially with reference to several optimum implementation of the accompanying drawing shown in corresponding.

Fig. 1 shows the rotary compressor of doing according to first embodiment of the invention (1).

Rotary compressor comprises a seal container (4), and a motor (2) and this electric motor driven compressor main body (3) of usefulness are housed in its inside.Compressor main body (3) is by an annular cylinder (5), one piston (7), this piston is gone up at the bent axle (6) of cylinder (5) lining and is done eccentric rotation, one main bearing (8) and a step bearing (9), two sides that its position is in same cylinder (5) closely contact, and so various compressions such as supporting crankshaft (6) thereon part constituted in addition.Pressing chamber (10) is that flange portion (8a) and (9a) by these main bearings (8) and step bearing (9) surrounds, and its side surface with cylinder (5) is contacted, and surrounding center hole, and piston (7) is done eccentric rotation in its inside.Compressor (10) is configured in the formed hole of diametric(al) (not showing out in the drawings) of this cylinder (5) slidably, and the end that utilizes blade (not expression in the drawings) is in the constant contact of external peripheral surface of same piston (7), is divided into hyperbaric chamber and low-pressure cavity.

Suppressing plate (11) is installed on boss (8b) external peripheral surface of main bearing (8) in the airtight mode that connects envelope rightly.The excircle end of inhibition plate (11) is assembled into the tight contact matching of outer peripheral surface with flange portion (8a), therefore, forms an inhibition chamber (12) of being defined by flange portion (8a) inhibition plate (11) in addition.(8a) locates at this flange portion, formed the tap hole (13) that high pressure vapour chamber one top-cross of same pressing chamber (10) connects with changing, and this hole is led to and suppressed chamber (12).In addition, at flange portion (8a), formed another hole (15) that connects on set pore (14) the exchange ground of cylinder (5), this hole is also led to as (13) and is suppressed chamber (12).In that side of the inhibition chamber (12) of this exhaust port (13), an expulsion valve (16) is provided, it is opened when discharge gas is put into the inhibition chamber.Wherein, cylinder (5) has the suction port of a shaping, and this mouth is connected with low pressure vapour chamber one top-cross of pressing chamber (10) with changing.Suction port connects with leading to outside suction tude (17) the exchange ground of seal container (4).

On the other hand, the flange portion (9a) in step bearing (9) has formed a mounting hole that matches with the mouth of the pore (14) of cylinder (5).Enter in this mounting hole, an end of fairlead (18) is to install in the mode that cooperates, so that be connected with pore (14) exchange ground, and the other end stretches out from seal container (4).Projection section (9b) in step bearing (9) for surrounding its end face, has been installed a ditch plate (19) of hermetica seal.Core at the axial direction of the bent axle (6) of main bearing (8) and step bearing (9) supporting, having formed one supplies lubricant oil and discharges the hole, road (6a) that gas is used, one end of through hole (6a) is the inside of seal container (4) of directly leading to a side of motor (2), and its other end is to feed the oil groove chamber (20) that is limited with ditch plate (19), because bent axle (6) ends at step bearing (9).This hole, road (6a) by bent axle (6) core also connects with an exchange ground, hole (6b), and it extends to the outer round surface of the eccentric supporting part of support piston (7).

Inner bottom part in seal container (4) is storing certain spacing lubricant oil (21).In addition, in this seal container (4), disposed a fuel supply line (22) that links to each other with ditch plate (19), this pipe is linked submergence a opening end (22a) in the lubricant oil (21), and its another opening end is connected with ditch plate (19), so that be passed into oil groove chamber (20).

The other end of fairlead (18) is to be connected with the heat exchanger exchange ground of the cooling unit of using as the compressed discharge gas of cooling.As exhaust end one side that an end of the injection pipe (24) of the feeding means of the discharge gas introducing lubricant oil (21) that is cooled is connected to heat exchanger (23).The other end (24a) of this injection pipe (24), as Fig. 2 clearly shown in, be to install by an opening end mode that is inserted into this fuel supply line (22), in this pipe floodlubrication oil (21), and between the interior perimeter surface of the outer surface of injection pipe and fuel supply line, form any space (25).In this way, the discharge gas that has been discharged from heat exchanger (23) is by injection pipe (24), be ejected into fuel supply line (22) from the other end of injection pipe, at that time, lubricant oil (21) comes up from any space (25) suction, and be fed to oil groove chamber (20), thereby enter hole (6a) and (6b) of bent axle (6) by supplying pipe (22).From this fact, we can say that (22) two pipes of injection pipe (24) and fuel supply line have constituted an oil pump.

On the end face of motor one side of seal container (4), a discharge tube (26) is provided, the one end leads to the inside of seal container (4), and the other end is connected with condenser (27).This condenser (27) is to be connected with vaporizer (29) by capillary tube (28) exchange ground, and vaporizer (29) is connected to inlet pipe connection (17) by suction tude (30).

Below, the operation to the rotary compressor (1) of the embodiment of relevant top said formation is described.

In case motor (2) begins action, bent axle (6) is driven in rotation, and is installed in piston (7) on the eccentric supporting part of this bent axle (6) and carries out off-centre in cylinder (5) lining and rotate.By the off-centre rotation of piston (7), cooled gas is by low-pressure cavity one side of suction tude (30) inspiration pressing chamber (10), and this cooled gas is compressed, and is delivered to hyperbaric chamber one side, and it is opened expulsion valve and enter and suppresses chamber (12) at this place.Therefore, utilize Driven Compressor main body (3) compressed cooled gas is sucked and discharge.

Be drained into the cooled gas that suppresses chamber (12), promptly discharge gas by hole (15), pore (14) and fairlead (18) be sent to heat exchanger (23) thus in and near thermodiffusion make in the discharge gas of its cooling and be ejected in the fuel supply line (22) by sparger (24), at this moment, lubricant oil (21) utilizes and enters into fuel supply line (22) in the formed space of the lap of injection pipe and fuel supply line (25) by the jet power by the discharge gas that comes from sparger (24) as previously mentioned.Be sent to the discharge gas of fuel supply line (22) and rely on the jet power inspiration simultaneously lubricant oil of discharging gas, output to the seal container all via oil groove chamber (20) hole (6a) and (6b), and from the crankshaft end of that side of motor by bent axle (6).Therefore, lubricant oil (21) is fed to the parts of each slip of compressor main body (3), and the cooling of lubricant oil (21) and compressor main body (3) is carried out simultaneously by means of discharging gas, and thus, the temperature of whole compressor raises and is suppressed.

The discharge gas and the lubricant oil (21) that are input into seal container (4) from the end of bent axle (6) move in the following manner: in other words, lubricant oil (21) splashes into the inner bottom part of seal container (4) with its deadweight on the one hand, so that store there again; On the other hand, discharge gas, is evaporated in the vaporizer (29) of the predetermined action of realizing it by condenser (27) and capillary tube (28) then via discharge tube (26), and is sucked into the pressing chamber (10) of compressor again through suction tude (30).

Therefore, after in a single day lubricant oil be cooled, give lubricant oil (21) by discharging gas feed, lubricant oil (21) and compressor main body (3) all are cooled, and raise so just suppressed the temperature of whole compressor, so, this just can reach and suppress the overheated of suction port, improves the sealability of lubricant oil (21), prevents reducing of motor (2) running efficiency, suppress the decline of the oil film strength of lubricant oil (21), damage of indivedual insulating material of inhibition motor (2) or the like.

The rotary compressor (40) that figure three explanations second embodiment according to the present invention is done.In Fig. 3, with those those the same, as just to be equal to parts of first embodiment shown in Figure 1, represent, and save their explanation with same reference number.

The rotary compressor of second embodiment (40), in the step bearing (41) of compressor as an integral body (3), two pipelines (42a) and (42b) are arranged, each root among these two pipelines (42a) and (42b) all crosses flange portion (41a), in addition, on the surface of the flange portion (41a) that closely contacts (to call " thin sheet surface " in the following text) with cylinder (5), formed groove between (42c), just as shown in Figure 4 and Figure 5, in order to connect two pipelines (42a) and (42b) with exchanging, one of these two pipelines (42a) and (42b), pipeline (42a) in this embodiment for example is that an end of the other end of the service pipe (43) that is connected with outlet one side with same thermal converter (23) is connected.Another pipeline (42b) is directly to lead to seal container (4) the inside.In addition, discharge tube (26) is to link to each other with space at the seal container (4) of that side at step bearing (41) place, and by condenser (27), capillary tube (28) is connected with the same suction tude of vaporizer (29) (30) exchange ground, and its first embodiment comes to this usually.

According to second embodiment, utilize heat exchanger (23), by the discharge gas that thermodiffusion is cooled off, flow through service pipe (43), and be transported in the pipeline (42a) of flange portion (41a) of step bearing (41).The thin sheet surface of flange (41a) form between groove (42c) near its thin sheet surface one side of cylinder (5) because like that, the channelled effect of that groove.Because this situation, groove (42c) and another pipeline (42b) are transported to the space of seal container (4) between discharge gas warp.At that time, enter direct contact the with step bearing (41) with the cylinder (5) of the compression member that constitutes compressor main body owing to discharge gas, just can be used to cool off these parts, therefore, do as a wholely, it can suppress the compressor temperature rising.

The discharge gas that turns back to seal container (4) again from discharge tube (26) via condenser (27), capillary tube (28) and vaporizer (29) are introduced into pressing chamber (10) by suction tude (30).

Directly contact owing to discharge gas and be by near the discharge gas that enters and heat exchanger, cool off constituent element with these compression units by means of thermodiffusion, so the cooling effectiveness of compressor main body is further improved, thereby, improved result can suppress the preheating of suction port, improves sealability of lubricant oil or the like.

Fig. 6 represents according to the rotary compressor of the 3rd embodiment of the present invention (50).In Fig. 6, the same with those of first embodiment shown in Figure 1, those parts that promptly are equal to represent with same reference number, and save the explanation to them.

In the rotary compressor (50) of the 3rd embodiment, the center hole (51a) of bent axle (51) is the constituent element that constitutes the whole compressor compression unit, and the end face that it does not reach a side of motor does not resemble first embodiment, but it is near the inside of motor (1).In other words, center hole (51a) is do not pass bent axle (51) axial.Yet this bent axle (51) has a hole (51b) that is connected with center hole (51a) with exchanging, and is formed at its diametric(al).In other words, the center hole (51a) of bent axle (51) is to rely on the exchange ground, space (53) of the deadend container between hole (51b) and hole (52) to be connected with motor (2) and compressor main body (3).In the accompanying drawing of the 3rd embodiment, the space that forms between the stator (2b) of reference number (54) expression motor (2) and the rotor (2a), and numeral (55) refer to by along its axially near it the stator extension of periphery and the space that forms.

Therefore, structure according to the 3rd embodiment described above, deliver to the discharge gas of oil groove chamber (20) and lubricant oil in the same mode of first embodiment, center hole (51a) through bent axle (51), arrive the rotor (2a) of motor and the hole (52) between the main bearing (8) by hole (51b) then, then, they arrive the space (53) of seal container (4).In this space, lubricant oil drips to the inner bottom part of seal container (4), to be stored in wherein; Discharge gas and then be fed to space (56) forward at the seal container on its right side, as viewed in Fig. 6, by the space between rotor (2a) and the stator (2b), perhaps in the space (55) of rotor (2a) formation as its passage.Afterwards, it flows out that space, enters condenser (27) by outlet pipe (2b), capillary tube (28) and vaporizer (29).To nubbin, compressor works with first embodiment the same manner.

As for this reason, the chilled cooled gas that turns back to compressor, process motor and each part of equally also passing through compressor main body, this cause just, cooled gas makes compressor main body and motor stator winding or the like lose heat, so that their temperature is reduced.This causes the improvement of whole compressor temperature distribution, therefore, not only improves resembling the preheating that suppresses suction port gas and the sealability of lubricant oil is improved also can be realized.And lead and life-span of insulating paper of encasing lead because the reduction of electromotor winding temperature can keep very long, thereby make the operation of device highly reliable.

Set forth as the front, according to rotary compressor of the present invention, the discharge gas of the compression of process compressor main body is by the thermodiffusion cooling of heat exchanger, thereafter, it returns compressor again, at that time, lubricant oil also draws up with pump and cools off, and each constituent element of compressor main body and motor is then cooled off by the there by lubricant oil.Use this method, obtained following various advantages; Improve and to be suppressed such as the whole compressor temperature, the preheating of entry port gas can be restrained, the sealability of lubricant oil can improve, simultaneously, again to the reduction of the operating efficiency of motor, the damage of each insulating material, decline of the oil film strength of lubricant oil or the like is suppressed, by these results, can show the characteristic and the operational reliability of the rotary compressor that is modified, sizable useful effect is then arranged.

Although the present invention uses in front with reference to its detailed embodiment and described, those technical skilled people just can say that invention has the embodiment of various conversion in above-mentioned spirit and scope in conjunction with the present invention, and this all is set forth in the additional claim.

Claims (4)

1, the formation of a rotary compressor, one of them compressor main body is installed in the container of a sealing, and make the lubricated lubricant oil of compressor main body be stored in the inner bottom part of deadend container, said rotary compressor is characterised in that the cooling mechanism that the compressed discharge gas of cooling is used also is housed, and the feed conduit of the discharge gas that constitutes by this mode, so that the discharge gas by the cooling of above-mentioned cooling mechanism, flow through the stationary part of the motor unit of described compressor main body.

2, rotary compressor according to claim 1, wherein said discharge gas feed pipeline is equipped with a fuel supply line, the one end leads in the stored lubricant oil of the inner bottom part of said deadend container, and in said stator, form a pipeline, to allow that said lubricant oil passes through said fuel supply line together forward under said discharge gas pressure, then, allow that discharging gas flows through said stationary part along path.

3, rotary compressor according to claim 2, wherein, described gas feed pipeline is equipped with one for discharging the injection pipe that gas is used, and this pipe is installed by the method in the hole of inserting said fuel supply line.Therefore, said lubricant oil takes said fuel supply line to from said injection pipe under the gas pressure of being discharged.

4, the formation of a rotary compressor, one of them compressor main body is arranged in the container of a deadend, and make the lubricated lubricant oil of compressor main body be stored in the inner bottom part of deadend container, said rotary compressor is characterised in that the cooling mechanism that discharge gas that cooled compressed is housed is used, and, in the bent axle of the compression unit that constitutes compressor main body, form pipeline in certain part at least, so that the discharge gas that turns back to said seal container from described cooling mechanism can be able to by, when it is in directly when contacting with the inside of said assembly of elements or outside, that said a certain assembly of elements or main bearing or step bearing, it is arranged in the two ends of cylinder, as said pressure portion, and the running shaft of supporting piston thereon, so that in the pressing chamber of said cylinder, carry out the off-centre rotation, and said pipeline, constitute in some way by groove between two holes of passing said bearing and a shaping, so that said two holes, with said cylinder exchange be connected in the tight contact surface of said bearing.

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