CN103089648B - Rotary compressor and control method thereof - Google Patents
Rotary compressor and control method thereof Download PDFInfo
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- CN103089648B CN103089648B CN201110352591.5A CN201110352591A CN103089648B CN 103089648 B CN103089648 B CN 103089648B CN 201110352591 A CN201110352591 A CN 201110352591A CN 103089648 B CN103089648 B CN 103089648B
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Abstract
The invention relates to a rotary machine comprising: a housing (20); a main bearing seat (90) fixedly arranged in the main bearing seat, wherein a main bearing (92) is arranged in the main bearing seat; a rotating shaft (80) rotatably supported by the main bearing housing via the main bearing, the rotating shaft being provided therein with a through hole (84) extending in an axial direction thereof, the through hole (84) forming part of a lubricating oil circuit; and a pressure sensor (120) in fluid communication with the through hole (84) through the lubrication oil detection passage (110), the pressure sensor configured to output a shut-off signal when a pressure created by the lubrication oil from the lubrication oil detection passage is less than a predetermined value. The present invention also relates to a control method of a rotary machine, wherein the operation of the rotary machine is stopped when a fluid pressure generated by lubricating oil flowing in a through hole detected by a pressure sensor is lower than a predetermined value. The invention can more directly and reliably detect the amount of lubricating oil in the rotary machine.
Description
Technical field
The present invention relates to a kind of rotary machine, particularly rotary compressor, the invention still further relates to a kind of controlling method of rotary machine.
Background technique
Rotary compressor is a kind of in rotary machine and generally includes housing, holds compressing mechanism in the housing, for the running shaft etc. driving the driving mechanism of compressing mechanism, driven by driving mechanism.Usually, in running shaft, be provided with each movable part supply lubricant oil that axially extended oilhole thinks compressor.In order to ensure the normal operation of compressor, enough lubricants capacities must be had in the oilhole of running shaft to ensure that various movable part obtains sufficient lubrication.When the lubricants capacity flowed in this oilhole is lower than predetermined value, compressor should be stopped protecting compressor.
At present, duplex even multi-union compressor system be widely used.In this duplex or multi-union compressor system, can optionally start one or more compressor and close other compressor, therefore lubricant oil can move and the lubricant oil in each compressor may be caused uneven in these compressors, even occurs that some compressor lacks lubrication oil condition.
In addition, be no matter in the compressor assembly formed at single compressor or in the multi-union compressor system be made up of multiple compressor, all likely cause lubricant oil to lack because of compressor assembly or compressor leakage of oil.
In addition, in large-scale refrigeration system, because length of pipe is longer, parts are more, lubricant oil also may be caused not to be circulated back in time in compressor and to cause compressor to lack lubricant oil.
Therefore, the lubricants capacity that must detect compressor exactly, to stop compressor in time, prevents compressor damage.
Summary of the invention
The technical problem to be solved in the present invention
But, also do not find the means that can detect the lubricants capacity in the oil circuit of compressor in easy reliable mode at present.
The liquid level sensor of some known at present detection liquid levels is only applicable to detect the liquid level in fuel tank or container.These sensors comprise: piezoelectricity type liquid level sensor, dry-reed liquid level sensor, ultrasonic type level sensing, photoelectric liquid-levle sensing etc.The sensor generally cannot be applied in sealed type or Semiclosed compressor, because the working environment in the compressor of these types is harsher, such as, temperature range in compressor and pressure range are all very wide, and pressure and temperature can produce circulation, and also may there is the impurity etc. of cast member.In addition, also may produce lubricant oil foam within the compressor, therefore these sensors accurately can not detect the liquid level of lubricants capacity or lubricant oil.
In addition, in some cases, even if having the lubricant oil of q.s in compressor or refrigeration system, but can not ensure necessarily to have the lubrication oil circulation of q.s or flow in the oilhole of running shaft of the various movable parts supply lubricant oil to compressor.Therefore, by detect lubricants capacity in compressor or refrigeration system or lubricant oil liquid level can not be true and reliable reflect the lubricant oil state being in fact supplied to various movable part by the oilhole in running shaft.
Therefore, the lubricants capacity in the oilhole of direct-detection running shaft is necessary.But existing liquid level sensor all cannot be competent at.
Technological scheme
An object of one or more embodiment of the present invention is to provide a kind of rotary machine that directly and reliably can detect the lubricants capacity flowed in the through hole of running shaft.
Another object of one or more embodiment of the present invention is to provide a kind of controlling method of reliable control rotary machine.
An aspect of this specification, provides a kind of rotating machinery, provide in particular a kind of rotary compressor, comprising: housing; Be arranged on the compressing mechanism in housing; Contiguous compressing mechanism is fixedly installed on the main bearing seat in described housing, is provided with main bearing in described main bearing seat; The running shaft pivotally supported via described main bearing by described main bearing seat, be provided with the axially extended through hole along described running shaft in described running shaft, described through hole forms a part for the oil circuit of described rotary compressor; And by pressure transducer that the lubricant oil sense channel be arranged near main bearing seat is communicated with described vented liquid, described pressure sensor configurations becomes the output connection signal when the pressure that the lubricant oil from described lubricant oil sense channel is formed is more than or equal to predetermined value, and exports cut-off signal when the pressure that the lubricant oil from described lubricant oil sense channel is formed is less than described predetermined value.
Preferably, described through hole is relative to the center axis of described running shaft.
Preferably, described main bearing comprises each other along axially spaced clutch shaft bearing part and second bearing part of described running shaft, and described lubricant oil sense channel comprises: extend through the sidewall of described running shaft and the oily detect aperture be communicated with the vented liquid in described running shaft, be formed in the circular gap that is communicated with between described clutch shaft bearing part and described second bearing part and with described oily detect aperture fluid and extend through described main bearing seat and the communicating passage be communicated with described pressure transducer fluid with described circular gap.
Alternately, described lubricant oil sense channel comprises: extend through the sidewall of described running shaft and the oily detect aperture be communicated with the vented liquid in described running shaft, be formed in described running shaft outer surface on and the Circumferential oil groove be communicated with described oily detect aperture fluid and extend through the communicating passage that described main bearing is communicated with described main bearing seat and with described Circumferential oil groove with described pressure transducer fluid.
Alternately, described rotary machine comprises the sleeve be arranged on outside described running shaft further, and wherein, described lubricant oil sense channel comprises: extend through the sidewall of described running shaft and the oily detect aperture be communicated with the vented liquid in described running shaft, be formed in described sleeve inner peripheral surface on and the Circumferential oil groove be communicated with described oily detect aperture fluid and extend through described sleeve and the communicating passage be communicated with described pressure transducer fluid with described Circumferential oil groove.
Alternately, described rotary machine comprises the sleeve be arranged on outside described running shaft further, and wherein, described lubricant oil sense channel comprises: extend through the sidewall of described running shaft and the oily detect aperture be communicated with the vented liquid in described running shaft, be formed in described running shaft outer surface on and the Circumferential oil groove be communicated with described oily detect aperture fluid and extend through described sleeve and the communicating passage be communicated with described pressure transducer fluid with described Circumferential oil groove.
Preferably, the central axis of described oily detect aperture is radially across the center of described running shaft.Preferably, the central axis of described oily detect aperture relative to the angle of line between the central axis of described running shaft and the central axis of described through hole according to allowing that minimum lubrication oil flow is determined in described through hole, describedly allow that minimum lubrication oil flow set must be larger, described angular setting larger.
Preferably, the opening of described oily detect aperture in described through hole relative to the distance of line between the central axis of described running shaft and the central axis of described through hole according to allowing that minimum lubrication oil flow is determined in described through hole.Preferably, described in allow minimum lubrication oil flow set must be larger, described distance setting larger.
Preferably, the opening of described oily detect aperture in described through hole relative to the central axis of described running shaft distance according in described through hole allow minimum lubrication oil flow determine.Preferably, described in allow minimum lubrication oil flow set must be larger, described distance setting less.
Preferably, being at least partially by allowing in the scope of pasta that minimum lubrication oil flow is formed in described through hole of the opening of described oily detect aperture in described through hole.
Preferably, in described oil circuit, be provided with the throttling arrangement for controlling flow of lubrication.
Preferably, described pressure transducer is arranged in described housing.
Preferably, described pressure transducer is arranged near described main bearing seat.
Preferably, described pressure transducer is arranged on the outer side wall of described housing.
Preferably, described predetermined value according to the setting position of described pressure transducer on the outer side wall of described housing and the pressure difference caused correct.
Preferably, described pressure transducer is pressure switch.
Preferably, the inside of described rotary machine is provided with oil reservoir, and described oil reservoir is communicated with vented liquid by pipeline.
Preferably, have lubricant oil storage device in the outer installment of described rotary machine, and described lubricant oil storage device is communicated with vented liquid by pipeline.
Preferably, described main bearing seat and described housing form.
Preferably, described lubricant oil sense channel is communicated with described vented liquid near described main bearing seat.
Preferably, described pressure transducer comprises: for receiving the hydrodynamic pressure receiving part of hydrodynamic pressure; And described hydrodynamic pressure can be converted to the conversion portion of electrical signal.
Preferably, described hydrodynamic pressure receiving part comprises: shell, is provided with fluid introduction passage in described shell, and can the piston head of axial motion in described shell, and the fluid matasomatism introduced by described fluid introduction passage is on the end face of described piston head; Described conversion portion comprises: the first contact and the second contact, and the contact disk providing electric connection between described first contact and described second contact, and described contact disk is arranged in described piston head.
Preferably, many otch are formed with in described contact disk.
Preferably, the side towards described piston head of described contact disk is provided with insulating trip, and the opposite side of described contact disk is provided with Returnning spring.
Preferably, described first contact and described second contact comprise multiple contact pilotage separately.
Preferably, vent is provided with in described piston head.
Preferably, described rotary machine is the one in scroll compressor, screw compressor, rotor-type compressor.
Preferably, described rotary machine is horizontal type scroll compressor.
Another aspect of this specification, provides a kind of controlling method for rotary compressor, and described rotary compressor comprises: housing; Be arranged on the compressing mechanism in housing; Contiguous compressing mechanism is fixedly installed on the main bearing seat in described housing, is provided with main bearing in described main bearing seat; The running shaft pivotally supported via described main bearing by described main bearing seat, the axially extended through hole along described running shaft is provided with in described running shaft, described through hole forms a part for the oil circuit of described rotary compressor, and the feature of described controlling method is: near main bearing seat, provide lubricant oil sense channel; The pressure transducer be communicated with vented liquid via lubricant oil sense channel is provided; The hydrodynamic pressure that the lubricant oil that flows in described through hole produces is detected by pressure transducer, and when described hydrodynamic pressure is lower than the running stopping described rotary machine during predetermined value.
Beneficial effect
Advantage according to the rotary machine of one or more embodiments of the present invention is:
The pressure transducer that lubricant oil sense channel is communicated with the vented liquid of running shaft is provided with in rotary machine, when the pressure that the lubricant oil from lubricant oil sense channel is formed is more than or equal to predetermined value, pressure transducer exports connection signal, and pressure transducer exports cut-off signal when the pressure that the lubricant oil from lubricant oil sense channel is formed is less than described predetermined value.By the detection that will change into the detection of lubricant oil volume or quality the pressure that lubricant oil is formed due to centrifugal force, more promptly and accurately, reliably can detect the lubricants capacity flowed in the through hole of running shaft easily, thus when lubricants capacity is not enough, rotary machine such as compressor can be closed in time and prevent it from damaging.
The simple structure of pressure transducer, with low cost, therefore, it is possible to greatly reduce the cost of lubricant oil detection.
Can be set suitably by the structure (such as the position etc. of its angle of inclination, opening) arranging the oily detect aperture be communicated with through hole in running shaft and to be detected allow minimum lubrication oil flow.In other words, when the actual flow of lubrication in through hole is lower than when allowing minimum lubrication oil flow, pressure transducer input cut-off signal, thus the formula machinery that stops the rotation is to protect it.
Pressure transducer can be arranged on the inside of rotary machine, also can be arranged on the outside of rotary machine, therefore easily can carry out flexible arrangement to the various parts of rotary machine.When the rotation axis horizontal of rotary machine is arranged, because pressure transducer is arranged in the diverse location of the periphery of rotary machine, the pressure difference that causes can be undertaken regulating compensating by the elastic force of the elastic member (such as Returnning spring) in pressure transducer, thus can detect more exactly while the position of flexible arrangement pressure transducer and allow minimum lubrication oil flow in running shaft.
Comparatively simple according to the pressure sensor structure of one or more embodiment of the present invention, cost is lower, but reliability is higher, the response time is shorter.
In addition, first contact and second contact of pressure transducer can comprise multiple contact pilotage separately, there is provided in the contact disk of electric connection between this external first contact and second contact and can be provided with many otch, this configuration improves the contact force between contact and contact disk and the manufacturing tolerances between various parts can be eliminated, therefore can improve the reliability of pressure transducer.
Accompanying drawing explanation
By the description referring to accompanying drawing, the feature and advantage of one or several embodiment of the present invention will become easier to understand, wherein:
Fig. 1 is the schematic cross sectional view of the rotary compressor according to one embodiment of the present invention;
Fig. 2 is the enlarged view of a part for rotary compressor shown in Fig. 1;
Fig. 3 is the enlarged view of I part in Fig. 2;
Fig. 4 is the schematic diagram of the lubricant oil sense channel according to embodiment of the present invention, wherein Fig. 4 A shows the longitdinal cross-section diagram of running shaft, main bearing and oil guide pipe, Fig. 4 B shows the end elevation along A direction of running shaft, and Fig. 4 C shows the amplification sectional view of running shaft along B-B cross section;
Fig. 5 shows the schematic diagram of the another kind of mode of execution of lubricant oil sense channel;
Fig. 6 shows the schematic diagram of another mode of execution of lubricant oil sense channel;
Fig. 7 shows the exploded perspective view of the pressure transducer according to embodiment of the present invention;
Fig. 8 shows the planimetric map of the contact disk of the pressure transducer according to embodiment of the present invention;
Fig. 9 shows schematic diagram when being in off state according to the pressure transducer of embodiment of the present invention;
Figure 10 shows schematic diagram when being on state according to the pressure transducer of embodiment of the present invention.
Embodiment
Description related to the preferred embodiment is only exemplary below, and is never the restriction to the present invention and application or usage.
Below with reference to Fig. 1, the essential structure according to the rotary compressor of one embodiment of the present invention is described.Fig. 1 is the schematic cross sectional view of the rotary compressor according to one embodiment of the present invention.Rotary compressor shown in Fig. 1 is a kind of scroll compressor, but, those skilled in the art should understand that, embodiments of the present invention are not limited to the scroll compressor shown in figure, contrary the present invention can also be applied to the compressor comprising running shaft of other types, such as screw compressor, rotor-type compressor etc., and the rotary machine of any type comprising running shaft.In addition, the present invention is not only applicable to the horizontal compressor of rotation axis horizontal orientation, and is applicable to the vertically-oriented vertical compressor of running shaft.
Rotary compressor 10 comprises and is generally columnar housing 20.One end of housing 20 is provided with dismountable front cover 30, the other end of housing 20 is provided with dismountable rear end cover 40.Front cover 30 and rear end cover 40 are fixed to housing 20 by the fastening piece of such as bolt.Be provided with air input joint on the housing 20 for sucking the gaseous refrigerant of low pressure.Front cover 30 is provided with discharge joint for the refrigeration agent after discharging compression.Between housing 20 and front cover 30, being also provided with the acoustical panel 50 of the axial direction horizontal expansion (in FIG for extending along roughly vertical direction) relative to housing 20, thus the inner space of compressor being separated into high pressure side and low voltage side.Particularly, the space, formation high pressure side, space between front cover 30 and acoustical panel 50, and the space between acoustical panel 50, housing 20 and rear end cover 40 forms low voltage side space.In the example of fig. 1, the space between front cover 30 and acoustical panel 50 is also configured for the oil reservoir storing lubricant oil.In other examples, lubricant oil storage device can be arranged on the outside of compressor 10, and is communicated with lubricating oil outlet with the lubricating oil inlet of compressor 10 by corresponding pipeline.
Compressing mechanism 60 and driving mechanism 70 is provided with in housing 20.In the example depicted in fig. 1, compressing mechanism 60 comprise be engaged with each other determine scroll element 62 and dynamic scroll element 64.Driving mechanism 70 comprises stator 72 and rotor 74.Stator 72 is fixedly connected with housing 20.Running shaft 80 to be engaged in rotor 74 and to rotate with rotor 74.The first end (being left end in Fig. 1) of running shaft 80 is provided with eccentric crank pin 82.The eccentric crank pin 82 of running shaft 80 inserts in the hub portion 66 of dynamic scroll element 64 and moves scroll element 64 with rotary actuation.
What be provided with along running shaft 80 in running shaft 80 is axially extended for the through hole 84 by lubricant oil, and through hole 84 comprises the concentric hole part 84-1 that extends from second end (being right-hand member Fig. 1) of running shaft 80 and eccentric and extend to the eccentric opening part 84-2 of the end face of eccentric crank pin 82 relative to concentric hole part 84-1.Described through hole 84 forms a part for the oil circuit of compressor.
The first end of running shaft 80 is supported via main bearing 92 by main bearing seat 90, and the second end is supported by rear bearing block 42.Main bearing 92 is arranged in main bearing seat 90.In the example illustrated in figure 1, main bearing seat 90 and housing 20 form.But main bearing seat 90 can be formed dividually with housing 20 and is then fixed together by suitable means of fixation.Rear bearing block 42 to be formed in rear end cover 40 and to be provided with the bearing of the second end for supporting rotating shaft 80 wherein.
The concentric hole part 84-1 of the through hole 84 of running shaft 80 is communicated with to introduce lubricant oil via pipeline with the lubricant oil storage device of the oil reservoir in compressor front cover 30 or compressor outer installment.When compressor operation, lubricant oil enters the concentric hole part 84-1 of running shaft 80, then enter eccentric opening part 84-2 under the influence of centrifugal force and against the flows outside along centrifugal force direction (see Fig. 4 C) of eccentric opening part 84-2, finally flowing out with the various movable parts of lubricate compressors from the end face of the eccentric crank pin 82 of running shaft.
In addition, in order to control to flow through the flow of lubrication of through hole 84 and reduce the pressure of lubricant oil, in the ingress of concentric hole part 84-1, can throttling arrangement be set.It should be appreciated by those skilled in the art that throttling arrangement can be arranged on other positions in oil circuit.
In addition, it should be appreciated by those skilled in the art that compressing mechanism 60 and driving mechanism 70 are not limited to the structure shown in figure.On the contrary, compressing mechanism 60 can be rotor-type compressor structure or screw-compression mechanism etc., and driving mechanism 70 can be arranged on enclosure interior or be arranged on the hydraulic drive mechanism of outside, pneumatic drive mechanism and various transmission driving mechanism.
Following document provides other details CN101900113A, US2009/0068048A1, US2009/0068045A1, US2009/0068044A1 and US2009/0068043A1 of the rotary compressor relevant to embodiment of the present invention.The full content of these documents is by referring to being incorporated herein.
As mentioned before, the various movable parts of compressor must be lubricated the normal operation of guarantee compressor fully.But the lubricant oil in compressor or refrigeration system with q.s necessarily can not ensure that these lubricant oil reliably can be fed to movable part fully.Therefore, in the present invention, have employed flow of lubrication in the through hole directly measuring running shaft lubricant oil being supplied to movable part to judge whether movable part can obtain sufficient lubrication, and when determining flow of lubrication and being not enough, send signal to stop the running of compressor.In addition, due to the rotation of running shaft, the lubricant oil in the through hole of running shaft will produce hydrodynamic pressure under the influence of centrifugal force, therefore, it is possible to judge the flow of lubricant oil by measuring or detect the hydrodynamic pressure produced by the lubricant oil in through hole.Thus, the detection of lubricant oil volume or quality will be changed into the detection to the pressure that lubricant oil is formed, with the pressure transducer of the cheap and simple even pressure switch liquid level sensor that replaces complex structure with high costs, greatly reduce the cost of product and improve the reliability of product.
Describe according to lubricant oil detection device of the present invention below with reference to Fig. 1-4.Wherein, Fig. 2 is the enlarged view of a part for rotary compressor shown in Fig. 1.Fig. 3 is the enlarged view of I part in Fig. 2.Fig. 4 is the schematic diagram of the lubricant oil sense channel according to embodiment of the present invention, wherein Fig. 4 A shows the longitdinal cross-section diagram of running shaft, main bearing and oil guide pipe, Fig. 4 B shows the end elevation along A direction of running shaft, and Fig. 4 C shows the amplification sectional view of running shaft along B-B cross section.
As Figure 1-3, lubricant oil detection device 100 is also comprised according to the rotary compressor 10 of embodiment of the present invention.The lubricant oil sense channel 110 be communicated with through hole 84 fluid of running shaft 80 and the pressure transducer 120 be communicated with through hole 84 fluid by lubricant oil sense channel 110 is comprised according to the lubricant oil detection device 100 of embodiment of the present invention.
In Fig. 1-3 example shown, lubricant oil sense channel 110 is preferably communicated with the eccentric opening part 84-2 fluid of through hole 84, but it will be understood by those skilled in the art that lubricant oil sense channel 110 also can be communicated with the concentric hole part 84-1 fluid of through hole 84.These two kinds of structures can realize substantially identical effect.In addition, preferably, lubricant oil sense channel 110 is communicated with to detect the flow of lubrication that can be supplied to movable part more exactly with the eccentric opening part 84-2 fluid of through hole 84 near main bearing seat 90.
Pressure transducer 120 can be configured to export connection signal when the pressure that the lubricant oil from lubricant oil sense channel 110 is formed is more than or equal to predetermined value, and exports cut-off signal when the pressure that the lubricant oil from lubricant oil sense channel is formed is less than predetermined value.More simply, pressure transducer 120 can construct a kind of pressure switch, when there is lubricant oil in lubricant oil sense channel 110, namely when lubricant oil introduces pressure switch by lubricant oil sense channel 110, pressure switch exports connection signal, otherwise when not having lubricant oil to introduce pressure switch by lubricant oil sense channel 110, pressure switch exports cut-off signal.When pressure transducer exports connection signal, show the lubricant oil that there is q.s in the through hole 84 of running shaft 80, therefore compressor 10 can remain in operation.And when pressure transducer exports cut-off signal, show that the lubricants capacity in the through hole 84 of running shaft 80 is not enough, compressor 10 therefore can be stopped protecting it.
In the example shown in Fig. 1-3, lubricant oil sense channel 110 extends through main bearing seat 90, main bearing 92 is communicated with through hole 84 fluid with the sidewall of running shaft 80.Particularly, main bearing 92 can comprise each other along axially spaced clutch shaft bearing part 92-1 and the second bearing part 92-2 of running shaft.Lubricant oil sense channel 110 can comprise: extend through the sidewall of running shaft 80 and the oily detect aperture 86 be communicated with through hole 84 fluid in running shaft 80, be formed in the circular gap 92-3 that is communicated with between clutch shaft bearing part 92-1 and the second bearing part 92-2 and with oily detect aperture 86 fluid and extend through main bearing seat 90 and between circular gap 92-3 and pressure transducer 120, provide the oil guide pipe 94 that fluid is communicated with.Clutch shaft bearing part 92-1 and the second bearing part 92-2 can be press-fitted in respectively in main bearing seat 90 and to keep certain axial distance to form described circular gap 92-3 betwixt.Pressure transducer 120 is arranged on the outer side wall of housing 20, and can connect, be threaded by such as bolt, the mode such as welding is fixed on the outer side wall of housing 20.In this case, the expensive real estate in compressor housing can be saved, simplify the layout of various parts.But, it will be understood by those skilled in the art that pressure transducer 120 also can be arranged on housing 20 inside to reduce the metrical error etc. caused by the length of lubricant oil sense channel 110.
Alternately, lubricant oil sense channel 110 can also be configured to comprise: extend through the sidewall of running shaft 80 and the oily detect aperture 86 be communicated with through hole 84 fluid in running shaft 80, be formed in running shaft 80 outer surface on and the Circumferential oil groove be communicated with oily detect aperture 86 fluid and extend through the communicating passage (that is, oil guide pipe 94) that main bearing 92 is communicated with main bearing seat 90 and with Circumferential oil groove with pressure transducer 120 fluid.
Lubricant oil sense channel 110 can also be configured to other forms.Such as, Fig. 5 and Fig. 6 shows other two kinds of mode of executions of lubricant oil sense channel.Particularly, sleeve 150 can be set in the region between main bearing seat 90 and driving mechanism 70 of running shaft 80.Sleeve 150 can be fixed relative to housing 20 by suitable mode.
As shown in Figure 5, sleeve 150 is provided with for the opening 154 through oil guide pipe, and on the inner circle wall of sleeve 150, is provided with the Circumferential oil groove 152 be communicated with the oily detect aperture 86 on running shaft 80 with opening 154.In this case, lubricant oil sense channel 110 can be configured to comprise: extend through the sidewall of running shaft 80 and the oily detect aperture 86 be communicated with through hole 84 fluid in running shaft 80, be formed in sleeve 150 inner peripheral surface on and the Circumferential oil groove 152 be communicated with oily detect aperture 86 fluid and extend through sleeve 150 and the communicating passage (i.e. oil guide pipe 94) be communicated with pressure transducer 120 fluid with Circumferential oil groove 152.
Alternately, as shown in Figure 6, Circumferential oil groove 88 can be provided with to replace the Circumferential oil groove on sleeve 150 on the outer surface of running shaft 80.In this case, lubricant oil sense channel 110 can be configured to comprise: extend through the sidewall of running shaft 80 and the oily detect aperture 86 be communicated with through hole 84 fluid in running shaft 80, be formed in running shaft 80 outer surface on and the Circumferential oil groove 88 be communicated with oily detect aperture 86 fluid and extend through sleeve 150 and the communicating passage (i.e. oil guide pipe 94) be communicated with pressure transducer 120 fluid with Circumferential oil groove 88.
In above-mentioned four kinds of situations, no matter Circumferential oil groove is formed by the circular gap between two sections of main bearings, still on the outer surface being arranged on running shaft or in the inner peripheral surface of sleeve, its object is all there is continuous print fluid communi in order to keep in the rotary course of running shaft between through hole 84 and pressure transducer 120.
Illustrate in embodiments of the present invention to the flow of lubrication testing process in the through hole of running shaft referring to Fig. 4.
When the lubricant oil from the oil reservoir of compressor inside or the lubricant oil storage device of compressor outside enters in the through hole 84 (comprising concentric hole part 84-1 and eccentric opening part 84-2) of running shaft 80, lubricant oil forms pasta OL as shown in Figure 4 C under the influence of centrifugal force.That is, the pasta OL of lubricant oil is close to the external lateral portion along centrifugal force direction of through hole 84.When lubricant oil flow exceed certain value time, lubricant oil to enter in the lubricant oil detect aperture 86 be communicated with through hole 84 and to enter pressure transducer 120 via lubricant oil sense channel 110, thus pressure transducer 120 can send connection signal remains in operation to make compressor.Otherwise when the flow of lubricant oil is lower than certain value, lubricant oil can not enter in lubricant oil detect aperture 86, thus do not have lubricant oil to arrive pressure transducer 120, thus pressure transducer 120 send cut-off signal to stop the running of compressor.
As shown in Figure 4 C, what the structure by changing lubricant oil detect aperture 86 can easily control to carry out stoppage protection to compressor allows minimum lubrication oil flow.In other words, when flow of lubrication actual in through hole 84 is lower than when allowing minimum lubrication oil flow, stop the running of compressor, and when flow of lubrication actual in through hole 84 be more than or equal to allow minimum lubrication oil flow time, permission compressor remains in operation.Allow minimum lubrication oil flow can according to the requirement of artificer by experiment etc. mode specifically determine and different requirement may be had for the compressor of different model or applied environment, do not repeat them here.
According to one embodiment of the present invention, the center O1 that the central axis O1-A of oil detect aperture 86 can be arranged to radially across running shaft 80, and the central axis O1-A of oily detect aperture 86 can according to allowing that minimum lubrication oil flow is determined in through hole 84 relative to the angle [alpha] of line O1-O2 between the central axis O1 of running shaft 80 and the central axis O2 of through hole 84.Particularly, allow that minimum lubrication oil flow set must be larger, then angle [alpha] can set larger.
According to another embodiment of the invention, the opening of oily detect aperture 86 in through hole 84 can according to allowing that minimum lubrication oil flow is determined in through hole 84 relative to the distance W of line O1-O2 between the central axis O1 of running shaft 80 and the central axis O2 of through hole 84.Particularly, allow that minimum lubrication oil flow set must be larger, then distance W sets larger.
According to another mode of execution of the present invention, the opening of oily detect aperture 86 in through hole 84 relative to the central axis O1 of running shaft 80 distance can according in through hole 84 allow minimum lubrication oil flow determine.Particularly, allow that minimum lubrication oil flow set must be larger, then distance L sets less.
According to further mode of execution of the present invention, being at least partially by allowing in the scope of the pasta OL that minimum lubrication oil flow is formed in through hole 84 of the opening of oily detect aperture 86 in through hole 84.
In the example described in Fig. 4 C, lubricant oil detect aperture 86 is arranged on the downstream side of pasta OL relative to running shaft 80 sense of rotation.But, it should be appreciated by those skilled in the art that lubricant oil detect aperture 86 also can be arranged on the upstream side of pasta OL relative to running shaft 80 sense of rotation.
In the example described in Fig. 4 C, lubricant oil detect aperture 86 is arranged to extend towards the central axis O1 radial direction of running shaft 80.But, those skilled in the art should understand that, lubricant oil detect aperture 86 can be arranged to extend along any direction, as long as it can be communicated with through hole 84 fluid, and in this case, can by controlling the opening of lubricant oil detect aperture 86 in through hole 84 with the distance W of line O1-O2 or control to allow the oily flow of minimum lubrication with the distance L of central axis O1.
As mentioned above, just can control to allow the oily flow of minimum lubrication in through hole 84 by the structure (position, direction etc.) changing lubricant oil detect aperture 86, therefore detection device of the present invention easily can be applied to compressor that is dissimilar or model.
In addition, as shown in Figure 2, pressure transducer 120 can be arranged on the top of housing 20 outer side wall.But, according to the layout requirements of compressor, pressure transducer 120 can be arranged on any position on housing 20 outer side wall, such as horizontal sidepiece or bottom.Now, the pressure difference of the hydrodynamic pressure caused by the difference of lubricant oil sense channel 110 is arranged can be compensated by the elastic force adjusting the elastic member such as spring in the sensitivity of pressure transducer or pressure transducer or be corrected.
Fig. 7-10 shows the example of the pressure transducer according to one embodiment of the present invention.Wherein, Fig. 7 shows the exploded perspective view of the pressure transducer according to embodiment of the present invention; Fig. 8 shows the planimetric map of the contact disk of the pressure transducer according to embodiment of the present invention; Fig. 9 shows schematic diagram when being in off state according to the pressure transducer of embodiment of the present invention; Figure 10 shows schematic diagram when being on state according to the pressure transducer of embodiment of the present invention.
As shown in Figure 7, pressure transducer 120 mainly comprises: shell 121, and it has the internal surface of substantial cylindrical; Cover plate 131, an end face of its covering shell 121; First contact 134 and the second contact 135, they pass cover plate 131 and seal relative to cover plate 131 via seal element 138; The piston head 124 that can slide in shell 121; Contact disk 127, it to be arranged in piston head 124 and can to provide electric connection between the first contact 134 and the second contact 135; Returnning spring 129, it is for providing restoring force for contact disk 127.In addition, diaphragm seal 130 can also be set between shell 121 and cover plate 131, and shell 121 and cover plate 131 can be fixed on the housing 20 of compressor by such as bolt 132.In addition, piston head 124 can be made up of plastics or metallic material.When piston head 124 by metallic material make to provide better durability time, insulating trip 126 can be provided between piston head 124 and contact disk 127.Pressure ring 128 can also be set between contact disk 127 and spring 129.In addition, shell 121 is also provided with bullport 123, piston head 124 is provided with guide rod 125, guide rod 125 can slide in bullport 123, thus piston head 124 can be moved reposefully in shell 121.Shell 121 is provided with fluid introduction passage 137 further to introduce the lubricant oil of this lubricant oil sense channel 110.The end face that the lubricant oil introduced from lubricant oil sense channel 110 acts on piston head 124 promotes piston head 124 thus seesaw.
As shown in Figures 9 and 10, when pressure transducer 120 introduced by lubricant oil, piston head 124 is pushed and moves towards the first contact 134 and the second contact 135, now, contact disk 127 is also along with piston head 124 moves towards the first contact 134 and the second contact 135 thus the first contact 134 and the second contact 135 are switched on, and now pressure transducer 120 exports connection signal.Otherwise, when not or no longer include lubricant oil introduce pressure transducer 120 time, piston head 124 be reset spring 129 promote leave the first contact 134 and the second contact 135, now pressure transducer 120 exports cut-off signal.
Vent 133 is provided with to reduce the fluid resistance in piston head 124 movement process in the guide rod 125 of piston head 124.
As shown in Figure 8, many otch S are provided with according on the contact disk 127 of embodiment of the present invention.Contact disk 127 is cut into multiple overhang by these otch S.When contact disk 127 contacts with the second contact 135 with the first contact 134, these overhangs can be out of shape to provide stable contact largely.Adopt this structure, even if because foozle or assembly error cause the end of the first contact 134 and the second contact 135 not at same plane, the elasticity provided due to overhang also can improve the contact stabilization of the first contact 134 and the second contact 135 and contact disk 127.
In addition, each in the first contact 134 and the second contact 135 can comprise multiple contact pilotage, respectively to improve contact effect further.
After tested, adopt the pressure transducer of embodiment of the present invention that good signal can be provided to export and the shorter reaction time, can provide compressor and reliably protect.
Although describe a kind of pressure transducer comprising piston, contact disk, contact and spring in embodiments of the present invention, but those skilled in the art should understand that, any suitable pressure transducer, particularly pressure switch well known in the art can be adopted in lubricant oil detection device of the present invention.
Although described various mode of execution of the present invention in detail at this, but should be appreciated that the present invention is not limited to the embodiment described in detail and illustrate here, other modification and variant can be realized when not departing from the spirit and scope of the invention by those skilled in the art.All these modification and variant all fall within the scope of the present invention.And all components described here can be replaced by component equivalent in other technologies.
Claims (31)
1. a rotary compressor, comprising:
Housing (20);
Be arranged on the compressing mechanism (60) in described housing (20);
Contiguous described compressing mechanism (60) is fixedly installed on the main bearing seat (90) in described housing (20), is provided with main bearing (92) in described main bearing seat;
The running shaft (80) pivotally supported via described main bearing (92) by described main bearing seat (90), be provided with the axially extended through hole (84) along described running shaft (80) in described running shaft (80), described through hole (84) forms a part for the oil circuit of described rotary compressor; And
By the pressure transducer (120) that the lubricant oil sense channel (110) be arranged near described main bearing seat (90) is communicated with described through hole (84) fluid, described pressure transducer (120) is configured to export connection signal when the pressure that the lubricant oil from described lubricant oil sense channel (110) is formed is more than or equal to predetermined value, and exports cut-off signal when the pressure that the lubricant oil from described lubricant oil sense channel (110) is formed is less than described predetermined value.
2. rotary compressor as claimed in claim 1, wherein, described through hole (84) is relative to the center axis of described running shaft (80).
3. rotary compressor as claimed in claim 1, wherein, described main bearing (92) comprises each other along axially spaced clutch shaft bearing part (92-1) and second bearing part (92-2) of described running shaft (80), and
Described lubricant oil sense channel (110) comprising: extend through the sidewall of described running shaft (80) and the oily detect aperture (86) be communicated with through hole (84) fluid in described running shaft (80), be formed in the circular gap (92-3) be communicated with between described clutch shaft bearing part (92-1) and described second bearing part (92-2) and with described oily detect aperture (86) fluid, and extend through described main bearing seat (90) and the communicating passage be communicated with described pressure transducer (120) fluid with described circular gap (92-3).
4. rotary compressor as claimed in claim 1, wherein, described lubricant oil sense channel (110) comprising: extend through the sidewall of described running shaft (80) and the oily detect aperture (86) be communicated with through hole (84) fluid in described running shaft (80), on the outer surface being formed in described running shaft (80) and the Circumferential oil groove be communicated with described oily detect aperture (86) fluid, and extend through the communicating passage that described main bearing (92) is communicated with described main bearing seat (90) and with described Circumferential oil groove with described pressure transducer (120) fluid.
5. rotary compressor as claimed in claim 1, comprises the sleeve (150) being arranged on described running shaft (80) outside further, and
Wherein, described lubricant oil sense channel (110) comprising: extend through the sidewall of described running shaft (80) and the oily detect aperture (86) be communicated with through hole (84) fluid in described running shaft (80), be formed in described sleeve (150) inner peripheral surface on and the Circumferential oil groove (152) be communicated with described oily detect aperture (86) fluid and extend through described sleeve (150) and the communicating passage be communicated with described pressure transducer (120) fluid with described Circumferential oil groove (152).
6. rotary compressor as claimed in claim 1, comprises the sleeve (150) being arranged on described running shaft (80) outside further, and
Wherein, described lubricant oil sense channel (110) comprising: extend through the sidewall of described running shaft (80) and the oily detect aperture (86) be communicated with through hole (84) fluid in described running shaft (80), be formed in described running shaft (80) outer surface on and the Circumferential oil groove (88) be communicated with described oily detect aperture (86) fluid and extend through described sleeve (150) and the communicating passage be communicated with described pressure transducer (120) fluid with described Circumferential oil groove (88).
7. the rotary compressor according to any one of claim 3-6, wherein, the central axis of described oily detect aperture (86) is radially across the center of described running shaft (80).
8. rotary compressor as claimed in claim 7, wherein, the central axis of described oily detect aperture (86) relative to the angle of line between the central axis of described running shaft (80) and the central axis of described through hole (84) according to allowing that minimum lubrication oil flow is determined in described through hole (84), described allow minimum lubrication oil flow set must be larger, described angular setting must be larger.
9. the rotary compressor according to any one of claim 3-6, wherein, the opening of described oily detect aperture (86) in described through hole (84) relative to the distance of line between the central axis of described running shaft (80) and the central axis of described through hole (84) according to allowing that minimum lubrication oil flow is determined in described through hole.
10. rotary compressor as claimed in claim 9, wherein, described in allow that minimum lubrication oil flow set must be larger, described distance sets larger.
11. rotary compressors according to any one of claim 3-6, wherein, the opening of described oily detect aperture (86) in described through hole (84) relative to the central axis of described running shaft (80) distance according in described through hole (84) allow minimum lubrication oil flow determine.
12. rotary compressors as claimed in claim 11, wherein, described in allow minimum lubrication oil flow set must be larger, described distance sets less.
13. rotary compressors according to any one of claim 3-6, wherein, being at least partially by allowing in the scope of pasta that minimum lubrication oil flow is formed in described through hole (84) of the opening of described oily detect aperture (86) in described through hole (84).
14. rotary compressors as claimed in claim 1, wherein, are provided with the throttling arrangement for controlling flow of lubrication in described oil circuit.
15. rotary compressors as claimed in claim 1, wherein, described pressure transducer (120) is arranged in described housing (20).
16. rotary compressors as claimed in claim 1, wherein, described pressure transducer (120) is arranged near described main bearing seat (90).
17. rotary compressors as claimed in claim 1, wherein, described pressure transducer (120) is arranged on the outer side wall of described housing (20).
18. rotary compressors as claimed in claim 17, wherein, described predetermined value according to the setting position of described pressure transducer (120) on the outer side wall of described housing (20) and the pressure difference caused correct.
19. rotary compressors as claimed in claim 1, wherein, described pressure transducer (120) is pressure switch.
20. rotary compressors as claimed in claim 1, wherein, the inside of described rotary compressor is provided with oil reservoir, and described oil reservoir are communicated with described through hole (84) fluid by pipeline.
21. rotary compressors as claimed in claim 1, wherein, have lubricant oil storage device in the outer installment of described rotary compressor, and described lubricant oil storage device are communicated with described through hole (84) fluid by pipeline.
22. rotary compressors as claimed in claim 1, wherein, described main bearing seat (90) and described housing (20) form.
23. rotary compressors as claimed in claim 1, wherein, described pressure transducer (120) comprising: for receiving the hydrodynamic pressure receiving part of hydrodynamic pressure; And described hydrodynamic pressure can be converted to the conversion portion of electrical signal.
24. rotary compressors as claimed in claim 23, wherein, described hydrodynamic pressure receiving part comprises:
Shell (121), is provided with fluid introduction passage (137) in described shell (121), and
Can the piston head (124) of axial motion in described shell (121), the fluid matasomatism introduced by described fluid introduction passage (137) is on the end face of described piston head (124);
Described conversion portion comprises:
First contact (134) and the second contact (135), and
Between described first contact (134) and described second contact (135), provide the contact disk (127) of electric connection, described contact disk (127) is arranged in described piston head (124).
25. rotary compressors as claimed in claim 24, wherein, are formed with many otch (S) in described contact disk (127).
26. rotary compressors as claimed in claim 24, wherein, the side towards described piston head (124) of described contact disk (127) is provided with insulating trip (126), and the opposite side of described contact disk (127) is provided with Returnning spring (129).
27. rotary compressors as claimed in claim 24, wherein, described first contact (134) and described second contact (135) comprise multiple contact pilotage separately.
28. rotary compressors as claimed in claim 24, wherein, are provided with vent (133) in described piston head (124).
29. rotary compressors as claimed in claim 1, wherein, described rotary compressor is the one in scroll compressor, screw compressor, rotor-type compressor.
30. rotary compressors as claimed in claim 1, wherein, described rotary compressor is horizontal type scroll compressor.
31. 1 kinds of controlling methods for rotary compressor, described rotary compressor comprises: housing (20); Be arranged on the compressing mechanism (60) in described housing (20); Contiguous described compressing mechanism (60) is fixedly installed on the main bearing seat (90) in described housing (20), is provided with main bearing (92) in described main bearing seat (90); The running shaft (80) pivotally supported via described main bearing (92) by described main bearing seat (90), the axially extended through hole (84) along described running shaft (80) is provided with in described running shaft (80), described through hole (84) forms a part for the oil circuit of described rotary compressor
The feature of described controlling method is:
Lubricant oil sense channel (110) is provided near described main bearing seat (90);
The pressure transducer (120) be communicated with described through hole (84) fluid via described lubricant oil sense channel (110) is provided;
The hydrodynamic pressure that the lubricant oil detecting flowing in described through hole (84) by described pressure transducer (120) produces, and
When described hydrodynamic pressure is lower than the running stopping described rotary compressor during predetermined value.
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| CN201110352591.5A CN103089648B (en) | 2011-11-07 | 2011-11-07 | Rotary compressor and control method thereof |
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| CN201110352591.5A CN103089648B (en) | 2011-11-07 | 2011-11-07 | Rotary compressor and control method thereof |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4669960A (en) * | 1985-02-26 | 1987-06-02 | Lexair, Inc. | Fluid pressure sensor |
| CN101493090A (en) * | 2008-01-24 | 2009-07-29 | 株式会社神户制钢所 | Screw compressor |
| CN102052316A (en) * | 2011-01-20 | 2011-05-11 | 上海康可尔压缩机有限公司 | Outer rotor vortex permanent magnet frequency conversion screw compressor system |
| CN202091205U (en) * | 2011-04-18 | 2011-12-28 | 艾默生环境优化技术(苏州)研发有限公司 | Rotary compressor and rotary machine |
| CN102748295A (en) * | 2011-04-18 | 2012-10-24 | 艾默生环境优化技术(苏州)有限公司 | Rotary compressor and rotary machine |
| CN202520555U (en) * | 2011-11-07 | 2012-11-07 | 艾默生环境优化技术(苏州)有限公司 | Rotary machine |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3254463B2 (en) * | 1991-12-24 | 2002-02-04 | 株式会社日立製作所 | Oil-cooled screw compressor and oil level determination method thereof |
| US6746216B2 (en) * | 2002-07-19 | 2004-06-08 | Scroll Technologies | Scroll compressor with vented oil pump |
-
2011
- 2011-11-07 CN CN201110352591.5A patent/CN103089648B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4669960A (en) * | 1985-02-26 | 1987-06-02 | Lexair, Inc. | Fluid pressure sensor |
| CN101493090A (en) * | 2008-01-24 | 2009-07-29 | 株式会社神户制钢所 | Screw compressor |
| CN102052316A (en) * | 2011-01-20 | 2011-05-11 | 上海康可尔压缩机有限公司 | Outer rotor vortex permanent magnet frequency conversion screw compressor system |
| CN202091205U (en) * | 2011-04-18 | 2011-12-28 | 艾默生环境优化技术(苏州)研发有限公司 | Rotary compressor and rotary machine |
| CN102748295A (en) * | 2011-04-18 | 2012-10-24 | 艾默生环境优化技术(苏州)有限公司 | Rotary compressor and rotary machine |
| CN202520555U (en) * | 2011-11-07 | 2012-11-07 | 艾默生环境优化技术(苏州)有限公司 | Rotary machine |
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