CN102748295B - Rotary compressor and rotary machine - Google Patents
Rotary compressor and rotary machine Download PDFInfo
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- CN102748295B CN102748295B CN201110104725.1A CN201110104725A CN102748295B CN 102748295 B CN102748295 B CN 102748295B CN 201110104725 A CN201110104725 A CN 201110104725A CN 102748295 B CN102748295 B CN 102748295B
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Abstract
The present invention relates to a rotary compressor, comprising: a housing (12) including a lubricating oil reservoir for containing lubricating oil; a compression mechanism (20) disposed within the housing (12); a drive mechanism (30) that drives the compression mechanism (20), the drive mechanism (30) including a rotary shaft (50), the rotary shaft (50) having a through hole (54, 56) provided therein that extends in an axial direction of the rotary shaft (50), the rotary shaft (50) being in fluid communication with the lubricating oil reservoir through the through hole (54, 56); and a fuel level sensor (120) in fluid communication with the through-holes (54, 56) in the rotary shaft (50) through the pressure collecting passage (110). The invention also relates to a rotary machine. The invention can accurately and reliably detect the lubricating oil in the compressor in a simple mode, thereby greatly saving the cost and improving the reliability of the compressor.
Description
Technical field
The present invention relates to a kind of rotary compressor and a kind of rotating machinery.
Background technique
Rotary compressor generally includes housing, be contained in compressing mechanism in housing, for driving mechanism of drive compression mechanism etc.In order to guarantee the normal operation of compressor, in compressor, must there is enough lubricant oil.Lubricant level in compressor must be higher than minimal protection lubricant level.Lubricant level in compressor during lower than this minimal protection lubricant level, should stop compressor.
The even multi-joint compressor assembly of duplex is widely used.In this duplex or multi-joint compressor assembly, can optionally start one or more compressor and close other compressor, therefore lubricant oil can move and may cause the lubricant oil in each compressor uneven in these compressors, even occurs that some compressor lacks lubricated oil condition.
In addition,, no matter be in the compressor assembly of the formation of single compressor or in the multi-joint compressor assembly being formed by a plurality of compressors, all likely because of compressor assembly or compressor leakage of oil, cause lubricant oil to lack.
In addition, in large-scale refrigeration system, because length of pipe is long, parts are more, also may cause lubricant oil can not be circulated back in time in compressor and cause that compressor lacks lubricant oil.
Therefore, must detect exactly the lubricant oil state (such as level height) of compressor, to stop in time compressor, prevent compressor damage.
Summary of the invention
The technical problem to be solved in the present invention
Yet, in current most compressors, there is no built-in fuel level sensor.
Although exist some to detect the liquid level sensor of liquid level, these liquid level sensors are 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 closed compressor, because the working environment in closed compressor is harsher, such as, the temperature range in compressor and pressure range are all very wide, and pressure and temperature can produce circulation, and also may there is impurity of cast member etc.In addition, in compressor, also may produce lubricant oil foam, so these sensors can not accurately detect level height.
Therefore, need a kind of can be more simply and detect reliably the rotary compressor of the lubricant oil in compressor.
Technological scheme
An one or more embodiments' of the present invention object be to provide a kind of can be simply and detect reliably the rotary compressor of the lubricant oil in compressor.
An one or more embodiments' of the present invention object be to provide a kind of can be simply and detect reliably the rotating machinery of the lubricant oil in rotating machinery.
An aspect of this specification provides a kind of rotary compressor, comprising: housing, and described housing comprises for holding the lubricant oil memory section of lubricant oil; Be arranged on the compressing mechanism in described housing; Drive the driving mechanism of described compressing mechanism, described driving mechanism comprises running shaft, is provided with the axially extended through hole along described running shaft in described running shaft, and described running shaft is communicated with described lubricant oil memory section fluid by described through hole; And the fuel level sensor being communicated with vented liquid in described running shaft by pressure acquisition passage.
Preferably, described rotary compressor further comprises that wherein said pressure acquisition passage comprises for supporting the step of described running shaft: extend through the sidewall of described running shaft and the pressure acquisition hole being communicated with vented liquid in described running shaft, be formed on described running shaft or described step and the Circumferential oil groove being communicated with described pressure acquisition hole fluid, the communicating passage that extends through described step and be communicated with described Circumferential oil groove and described fuel level sensor fluid.
Preferably, described rotary compressor further comprises the pressure acquisition device being arranged between described running shaft and described fuel level sensor, and wherein said pressure acquisition passage comprises: extend through the sidewall of described running shaft and the pressure acquisition hole being communicated with vented liquid in described running shaft, be formed on described running shaft or described pressure acquisition device and the Circumferential oil groove being communicated with described pressure acquisition hole fluid, the communicating passage that extends through described pressure acquisition device and be communicated with described Circumferential oil groove and described fuel level sensor fluid.
Preferably, described pressure acquisition passage also comprises and being arranged in described pressure acquisition hole and towards the outstanding pressure acquisition pipe of axis of the through hole of described running shaft.
Preferably, the length of described pressure acquisition pipe is determined according to the minimal protection lubricant level in described lubricant oil memory section.
Preferably, described minimal protection lubricant level is set highlyer, and the length setting of described pressure acquisition pipe must be longer.
Preferably, between described minimal protection lubricant level and the length of described pressure acquisition pipe, meet following relation:
wherein, the height that H is the described minimal protection lubricant level counted from the end face of described running shaft, unit be millimeter; L is that described pressure acquisition pipe is projected into the length in described running shaft, and unit is millimeter; R is the inside radius of described running shaft, and unit is millimeter; The height of the central axis that h is the described pressure acquisition pipe counted from the end face of described running shaft, unit be millimeter; N is the revolution of described running shaft, and unit is rev/min; G is gravity accleration, and unit is meter per second
2.
Preferably, the height of the specific reference surface of described pressure acquisition pitch-row one (S) is determined according to the minimal protection lubricant level in described lubricant oil memory section.
Preferably, described minimal protection lubricant level is set highlyer, and the height setting in described pressure acquisition hole must be higher.
Preferably, the bottom surface that described reference surface is described rotary compressor or the end face of described running shaft.
Preferably, described rotary compressor further comprises pump oil machine structure, and described pump oil machine structure comprises the oil fork in the through hole that is arranged on the orifice plate of described running shaft end and is arranged on described running shaft.
Preferably, described pump oil machine structure comprises the wing pump that is arranged on described running shaft end.
Preferably, described rotary compressor is that Horizontai rotary compressor and its inner space are separated into high pressure side and low voltage side by acoustical panel, described high pressure side forms described lubricant oil memory section, and described pump oil machine structure is for extending to the oil pipe of the through hole of described running shaft from described lubricant oil memory section.
Preferably, described through hole comprises the concentric hole part concentric with described running shaft and the eccentric opening part of radially setovering with respect to described concentric hole.
Preferably, described fuel level sensor is pressure transducer.
Preferably, described fuel level sensor is pressure switch.
Preferably, described fuel level sensor 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 and piston head that can axial motion in described shell; Described conversion portion comprises wiring terminal, is arranged on the first contact and the second contact in described wiring terminal, electric connection is provided between described piston head and described the second contact and provides the spring of restoring force for described piston head, wherein when described piston head contacts with described the first contact, described fuel level sensor output electrical signals.
Preferably, described the first contact comprises the pin portion of a plurality of spaced settings.
Preferably, described the second contact comprises the annular contact disk electrically contacting with described spring.
Preferably, described rotary compressor further comprises oil temperature sensor.
Preferably, described oil temperature sensor and described fuel level sensor have shared pin.
Preferably, described fuel level sensor is arranged near described step.
Preferably, described fuel level sensor is directly connected with the communicating passage in described step or described pressure acquisition device.
Preferably, described fuel level sensor is connected by extra pipeline with the communicating passage in described step or described pressure acquisition device.
Preferably, described rotary compressor is scroll compressor or screw compressor or rotor-type compressor.
Preferably, described fuel level sensor is arranged on described enclosure interior or outside.
Preferably, when described fuel level sensor is arranged on described outside, described pressure acquisition passage further comprises the connecting tube being communicated with communicating passage fluid in described step or pressure acquisition device.
Preferably, described connecting tube is horizontally disposed with or is obliquely installed.
Another aspect of this specification, provides a kind of rotating machinery, comprising: housing, and described housing comprises for holding the lubricant oil memory section of lubricant oil; Be arranged on the running shaft in described housing, be provided with the axially extended through hole along described running shaft in described running shaft, described running shaft is communicated with described lubricant oil memory section fluid by described through hole; And the fuel level sensor being communicated with vented liquid in described running shaft by pressure acquisition passage.
Preferably, described rotating machinery further comprises that wherein said pressure acquisition passage comprises for supporting the bearing support of described running shaft: extend through the sidewall of described running shaft and the pressure acquisition hole being communicated with vented liquid in described running shaft, be formed on described running shaft or described bearing support and the Circumferential oil groove being communicated with described pressure acquisition hole fluid, the communicating passage that extends through described bearing support and be communicated with described Circumferential oil groove and described fuel level sensor fluid.
Preferably, described rotating machinery further comprises the pressure acquisition device being arranged between described running shaft and described fuel level sensor, and wherein said pressure acquisition passage comprises: extend through the sidewall of described running shaft and the pressure acquisition hole being communicated with vented liquid in described running shaft, be formed on described running shaft or described pressure acquisition device and the Circumferential oil groove being communicated with described pressure acquisition hole fluid, the communicating passage that extends through described pressure acquisition device and be communicated with described Circumferential oil groove and described fuel level sensor fluid.
Beneficial effect
According to the advantage of one or more embodiments' of the present invention rotary compressor and rotating machinery, be:
Therefore at compressor or rotating machinery inside, be provided with oil level detection mechanism, can detect more in time, accurately, reliably the lubricant oil in compressor or rotating machinery, to prevent or to reduce compressor or rotating machinery damages because lubricant oil is not enough.
Oil level detection mechanism comprises fuel level sensor and the pressure acquisition passage being communicated with vented liquid in running shaft, and fuel level sensor a kind of pressure transducer or pressure switch.Therefore, the structure of oil level detection mechanism is simpler, is therefore convenient to processing, and has reduced the cost of compressor or rotating machinery.
In one or more embodiments of the present invention, by converting the oil level detection in compressor or rotating machinery to signal detecting, can be more simply and detect reliably the lubricant oil in compressor or rotating machinery, and could adopt pressure transducer or the pressure switch that the simpler cost of structure is lower to replace expensive liquid level sensor.
By the length of pilot pressure collection tube or the height in pressure acquisition hole, can adjust relatively easily the lubricant level that expectation detects.Therefore, can be applied to relatively easily compressor or the rotating machinery of all kinds, model.
One or more embodiments' of the present invention fuel level sensor structure is simpler, so cost is lower, but reliability is higher, the response time is shorter.
The first contact of fuel level sensor comprises a plurality of spaced pin portions, as long as any one pin portion contacts with piston head, is exportable Continuity signal.Therefore, improved the reliability of fuel level sensor.
Fuel level sensor can be arranged on enclosure interior or the outside of compressor, and fuel level sensor can directly be communicated with pressure acquisition passage or by extra pipeline connection, therefore the layout of each parts in compressor greatly easily.
In one or more embodiments' of the present invention rotary compressor, fuel level sensor is not only provided, and oil temperature sensor is provided, therefore can provide multiple protective for compressor.
Accompanying drawing explanation
By the description referring to accompanying drawing, it is easier to understand that one or several embodiment's of the present invention feature and advantage will become, wherein:
Fig. 1 is according to the schematic cross sectional view of the rotary compressor of one embodiment of the present invention;
Fig. 2 is the enlarged view of the bottom of rotary compressor shown in Fig. 1;
Fig. 3 is according to the schematic diagram of the oil level detection mechanism of embodiment of the present invention;
Fig. 4 is according to the stereogram of the lower bearing that is integrated with fuel level sensor of embodiment of the present invention;
Fig. 5 is arranged on according to the oil fork in the rotary compressor of embodiment of the present invention;
Fig. 6 is according to the plan view of the fuel level sensor of embodiment of the present invention;
Fig. 7 is according to the sectional drawing of the fuel level sensor of embodiment of the present invention, shows fuel level sensor in off state;
Fig. 8 is according to the sectional drawing of the fuel level sensor of embodiment of the present invention, shows fuel level sensor on state;
Fig. 9 is according to the schematic diagram of the oil level detection mechanism of another embodiment of the invention;
Figure 10 is according to the schematic diagram of the distortion of the oil level detection mechanism of another embodiment of the invention;
Figure 11 shows the inside radius of minimal protection lubricant level, running shaft, the relation between the height of pressure acquisition pipe and the length of pressure acquisition pipe;
Figure 12 is according to the schematic diagram of the oil level detection mechanism of another embodiment of the invention; And
Figure 13 A and 13B are the schematic cross sectional view of the rotary compressor bottom of the further mode of execution according to 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, describe according to the essential structure of rotary compressor of the present invention.Fig. 1 is according to the schematic cross sectional view of the rotary compressor of 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, the invention is not restricted to the scroll compressor shown in figure, contrary the present invention can also be applied to the compressor that comprises running shaft of other types, such as screw compressor, rotor-type compressor etc., and the rotating machinery that comprises any type of running shaft.In addition, the present invention is not only applicable to the vertically-oriented vertical compressor of running shaft, and is applicable to the horizontal compressor of running shaft horizontal orientation.
Rotary compressor 10 comprises and is generally columnar housing 12.On housing 12, be provided with air input joint 13, for sucking the gaseous refrigerant of low pressure.One end of housing 12 is fixedly connected with end cap 14.End cap 14 is equipped with discharge joint 15, for discharging the refrigeration agent after compression.Between housing 12 and end cap 14, be also provided with the acoustical panel 16 of the axial direction horizontal expansion (being the direction extension along approximate horizontal) with respect to housing 12 in Fig. 1, thereby the inner space of compressor is separated into high pressure side and low voltage side.Space, formation high pressure side, space between end cap 14 and acoustical panel 16, and space between acoustical panel 16 and housing 12 forms low voltage side space.A part for housing 12 is configured for holding the lubricant oil memory section of lubricant oil.In the example of Fig. 1, lubricant oil stores location is in the bottom of housing 12.
In housing 12, be equipped with compressing mechanism 20 and driving mechanism 30.In the example depicted in fig. 1, compressing mechanism 20 comprise be engaged with each other determine scroll element 22 and moving scroll element 24.Driving mechanism 30 comprises motor 40 and running shaft 50.Motor 40 comprises stator 42 and rotor 44.Stator 42 is fixedly connected with housing 12.Rotor 44 is fixedly connected with running shaft 50 and rotation in stator 42.The first end of running shaft 50 (being upper end in Fig. 1) is provided with eccentric crank pin 52, and the second end of running shaft 50 (being lower end in Fig. 1) can comprise concentric hole 54.Concentric hole 54 is led to the eccentric crank pin 52 of running shaft 50 first ends via the eccentric opening 56 with respect to concentric hole 54 radial offset.Running shaft 50 is communicated with described lubricant oil memory section fluid by concentric hole 54.
The first end of running shaft 50 is supported by main bearing seat 60, and the second end is supported by step 70.Main bearing seat 60 and step 70 are fixedly attached to housing 12 by suitable mode.The eccentric crank pin 52 of running shaft 50 is inserted into via lining 58 in the hub portion 26 of moving scroll element 24 to rotarily actuate moving scroll element 24.
The second end (being lower end in Fig. 1) at running shaft 50 can also arrange pump oil machine structure 80.In the example depicted in fig. 1, pump oil machine structure 80 comprises the oil fork 84 that is arranged on the orifice plate 82 at running shaft 50 second end places and rotation in being arranged on concentric hole 54 and together with running shaft 50.Orifice plate 82 is roughly disc and center is provided with through hole 83.Fig. 5 shows a kind of example of oil fork 84.As shown in Figure 5, oil fork 84 comprises that base portion is roughly the base portion 86 of rectangle, from base portion 86 along identical direction extension and the shank 87 and 88 of bifurcated.With respect to the plane at base portion place, sense of rotation A's plane at shank 87 and 88 places along running shaft 50 tilts.
When compressor operation, the lubricant oil of housing 12 bottoms enters the concentric hole 54 of running shaft 50 by the through hole 83 of orifice plate 82.Under the effect of centrifugal force, lubricant oil radially from orifice plate 82 inwall of the periphery of mind-set orifice plate 82 and concentric hole 54 flow.Under the drive of the shank 87 of the oil fork 84 of rotation together with running shaft 50 and 88, lubricant oil upwards pumping also form the roughly shape of parabola P in concentric hole 54, as shown in Figure 3.Subsequently, lubricant oil enters in the eccentric opening 56 being communicated with concentric hole 54 fluids and arrives the end of eccentric crank pin 52.After discharge the end from eccentric crank pin 52, lubricant oil flows downward and splashes and each moving element of lubrication and cooling under the drive of various moving elements under Action of Gravity Field.
In the example depicted in fig. 1, adopted by orifice plate 82 and the oil fork 84 pump oil machine structures that form.But, it should be appreciated by those skilled in the art that pump oil machine structure is not limited to this, but can adopt any mechanism in the concentric hole 54 that lubricant oil can be supplied to running shaft 50.In addition, can adopt wing pump replace shown in Fig. 1 by orifice plate 82 and the oil fork 84 pump oil machine structures that form.In addition, in horizontal compressor, because most of lubricant oil is stored in high pressure side (now, high pressure side forms above-mentioned lubricant oil memory section), therefore can use the oil pipe that extends to the concentric hole of the running shaft that is positioned at low voltage side from high pressure side to be used as pump oil machine structure, now can realize by the pressure reduction between high pressure side and low voltage side the supply of lubricant oil.
In addition, it should be appreciated by those skilled in the art that compressing mechanism 20 and driving mechanism 30 are not limited to the structure shown in figure.On the contrary, compressing mechanism 20 can be rotor-type compressor Gou He screw-compression mechanism etc., and driving mechanism 30 can be arranged on enclosure interior or be arranged on hydraulic drive mechanism, pneumatic drive mechanism and the various transmission driving mechanism of outside.
Following document provides other details of the rotary compressor relevant to embodiment of the present invention: CN201206549Y, US2009/0068048A1, US2009/0068045A1, US2009/0068044A1 and US2009/0068043A1.The full content of these documents is incorporated herein by reference.
In compressor, must there is the normal operation of enough lubricant oil guarantee compressors.In other words, the amount of the lubricant oil in compressor, the level height of lubricant oil for example, for example during minimal protection lubricant level, must stop compressor to prevent compressor damage lower than predetermined value.
Below with reference to Fig. 1-8, describe according to oil level detection of the present invention mechanism.Wherein, Fig. 2 is the enlarged view of the bottom of rotary compressor shown in Fig. 1.Fig. 3 is according to the schematic diagram of the oil level detection mechanism of embodiment of the present invention.Fig. 4 is according to the stereogram of the lower bearing that is integrated with fuel level sensor of embodiment of the present invention.
As Figure 1-3, according to the rotary compressor 10 of embodiment of the present invention, also comprise the oil level detection mechanism 100 that is arranged on compressor 10 inside.According to the oil level detection mechanism 100 of embodiment of the present invention, comprise the fuel level sensor 120 with concentric hole 54 internal fluid communication of running shaft 50 by pressure acquisition passage 110.In the example depicted in fig. 3, pressure acquisition passage 110 can comprise along direction radially roughly extend through running shaft 50 sidewalls pressure acquisition hole 112, be arranged in step 70 and the Circumferential oil groove 114 being communicated with pressure acquisition hole 112 fluids and the edge communicating passage 116 that roughly direction radially extends through step 70 and is communicated with fluid input 122 fluids of Circumferential oil groove 114 and fuel level sensor 120 in step 70.Fuel level sensor 120 can be arranged on step 70 places or be arranged near step 70.In the rotary course of running shaft 50, the pressure acquisition hole 112 on running shaft 50 also rotates.Owing to being provided with the Circumferential oil groove corresponding with the rotate path in pressure acquisition hole 112 114, therefore pressure acquisition hole 112 can be communicated with Circumferential oil groove 114 fluids all the time, and then be communicated with communicating passage 116 fluids all the time, thereby by fluid stable be incorporated into the fuel level sensor 120 being attached thereto.
Fig. 6 is according to the plan view of the fuel level sensor of embodiment of the present invention, and wherein the shell of fuel level sensor does not illustrate in the drawings.Fig. 7 is according to the sectional drawing of the fuel level sensor of embodiment of the present invention, shows fuel level sensor in off state.Fig. 8 is according to the sectional drawing of the fuel level sensor of embodiment of the present invention, shows fuel level sensor on state.
As shown in Fig. 6-8, fuel level sensor 120 comprise general cylindrical shape shell 121, can axial motion in shell 121 piston cap 123, together with piston cap 123 piston head 125 of motion, the wiring terminal 126 of closure 121 one end, be arranged on the first contact 127 and the second contact 128 in wiring terminal 126 and be arranged on piston head 125 and wiring terminal 126 between Returnning spring.On one end sidewall contrary with wiring terminal 126 of shell 121, be provided with fluid input 122, on the sidewall of shell 121, be formed with exhaust port 124.In the process of piston head 125 axial motions, thereby the fluid between piston head 125 and wiring terminal 126 reduces via exhaust port 124 discharges the resistance causing supplying with fluid.The piston rod 125a of piston head 125 extends through in wiring terminal 126 through hole 131 that forms and can axial motion in through hole 131.The first contact 127 can comprise a plurality of being connected to each other but the spaced 127A of pin portion and 127B.In example in the drawings, the first contact 127 comprises two 127A of pin portion and 127B, but it should be appreciated by those skilled in the art that the first contact 127 can only comprise a pin portion or more than the pin portion of two.The second contact 128 can comprise annular contact disk 128A.Annular contact disk 128A is arranged in the stepped part of wiring terminal 126.The annular contact disk 128A of Returnning spring 129 and the second contact 128 and piston head 125 electric connections.In addition, as shown in Figure 2, the outside of compressor is led to by the ABAP Adapter 150 being arranged on housing 12 in the first contact 127 and second contact 128 of fuel level sensor 120.
As shown in Figure 7, when the entrance 122 of fuel level sensor 120 is not supplied with fluid, piston head 125 moves towards the direction contrary with the second contact 128 with the first contact 127 under the effect of Returnning spring 129, thereby disconnects the first contact 127 and the second contact 128.Now, fuel level sensor 120 is output signal not, or output " 0 " signal.
As shown in Figure 8, when entrance 122 supplies of fuel level sensor 120 have fluid, piston head 125 is promoted to overcome the active force of Returnning spring 129 by fluid that supplied with and moves towards the first contact 127 and the second contact 128, can conducting the first contact 127 and the second contact 128 when piston head 125 contacts with any one pin portion of the first contact 127.Now, fuel level sensor 120 output Continuity signals, or output " 1 " signal.
A kind of specific fuel level sensor has been described in Fig. 6-8.It should be appreciated by those skilled in the art that fuel level sensor can be the sensor of any type comprising for receiving the hydrodynamic pressure receiving part of hydrodynamic pressure and described hydrodynamic pressure can being converted to the conversion portion of electrical signal.
The process that detects lubricant oil in the rotary compressor of embodiment of the present invention is described below.In the housing 12 of compressor, have moderate lubrication when oil, the lubricant oil entering in the concentric hole 54 of running shaft 50 forms parabola P as shown in Figure 3 under the effect of centrifugal force.Now, lubricant oil by the pressure acquisition hole 112 on running shaft sidewall, be formed on the fluid input 122 that Circumferential oil groove 114 in step 70 and the communicating passage 116 in step 70 enter fuel level sensor 120.As mentioned above, under the promotion of lubricant oil, piston head 125 is towards the first contact 127 and the motion of the second contact 128 final conducting the first contact 127 and the second contacts 128, thereby sends the signal of " 1 ", shows to have moderate lubrication oil in compressor.On the contrary, while there is no the lubricant oil of q.s in the housing 12 of compressor, do not have lubricant oil to arrive the fluid input 122 of fuel level sensor 120, so the signal of fuel level sensor 120 outputs " 0 ", show not have in compressor the lubricant oil of q.s.
In order to detect more exactly the lubricant level in compressor, can in the pressure acquisition hole 112 of running shaft sidewall, arrange towards the outstanding pressure acquisition pipe 118 of the axis of concentric hole 54.Can for example, by the inside outstanding length (, the length L shown in Fig. 9 and 11) of pressure acquisition pipe 118, control the lubricant level that expectation detects.As shown in Figure 3, when the far-end 119 of pressure acquisition pipe 118 is positioned at the pasta being represented by parabola P, lubricant oil can enter pressure acquisition pipe 118.In the process of moving along pressure acquisition pipe 118, the kinetic energy of lubricant oil can change into pressure, therefore at the two ends of pressure acquisition pipe 118, produces certain pressure difference.When having the lubricant oil of certain pressure and enter fuel level sensor 120, the piston head 125 of fuel level sensor 120 is pushed and conducting the first contact 127 and the second contact 128, therefore the signal of output " 1 ".When the far-end 119 of pressure acquisition pipe 118 is positioned at outside the pasta being represented by parabola P, lubricant oil can not enter fuel level sensor 120 and export the signal of " 0 ".Therefore; when the lubricant level (being minimal protection lubricant level) of expectation detection is set highlyer; can adopt the pressure acquisition pipe 118 of length; and when the lubricant level (being minimal protection lubricant level) of expectation detection is set lowlyer, can adopt the pressure acquisition pipe 118 of smaller length.Particularly, can determine compressor relation between minimal protection lubricant level and the length of pressure acquisition pipe 118 under specific operation by calculating or testing.
Referring to Figure 11, between minimal protection lubricant level and the length of pressure acquisition pipe 118, can meet following relation especially:
Wherein, the height that H is the minimal protection lubricant level S2 counted from the end face S0 of described running shaft 50, unit be millimeter;
L is that pressure acquisition pipe 118 is projected into the length in running shaft 50, and unit is millimeter;
R is the inside radius of running shaft 50, and unit is millimeter;
The height of the central axis S1 that h is the pressure acquisition pipe 118 counted from the end face S0 of running shaft 50, unit be millimeter;
N is the revolution of running shaft, and unit is rev/min;
G is gravity accleration, and unit is meter per second 2.
According to above-mentioned formula, for example, work as h=32mm, L=6.9mm, n=2000rpm, R=9mm, g=9.81m/s
2time, H ≈ 22mm.That is,, when the rotating speed of rotation is 2000 revs/min, pressure acquisition pipe when being projected into length in running shaft and being 6.9 millimeters, the minimal protection lubricant level that fuel level sensor can detect is about 22 millimeters.That is to say, the lubricant level in lubricant oil memory section is during higher than 22 millimeters, and fuel level sensor can be exported the signal of " 1 ", shows that compressor can run well.And lubricant level in lubricant oil memory section is during lower than 22 millimeters, fuel level sensor can not be exported the signal (i.e. the signal of output " 0 ") of " 1 ", shows that the lubricant oil in compressor is not enough, thereby compressor protection mechanism will stop compressor.
Except the above-mentioned mode that pressure acquisition pipe is set, can also for example, by apart from special datum face (adjusting pressure acquisition hole 112, reference level S described in Fig. 9, it can be the bottom surface of compressor, can be also the end face S0 of running shaft 50) height h carry out to detect more exactly the lubricant level in compressor.Particularly; when the lubricant level (being minimal protection lubricant level) of expectation detection is set highlyer; can pressure acquisition hole 112 be arranged highlyer apart from the height of special datum face; and the lubricant level (being minimal protection lubricant level) detecting when expectation is while setting lowlyer, can pressure acquisition hole 112 be arranged lowlyer apart from the height of special datum face.Particularly, can determine that compressor expects that under specific operation the lubricant level that detects and pressure acquisition hole 112 are apart from the relation between the height of special datum face by calculating or testing.
In the example depicted in fig. 3, pressure acquisition passage 110 comprises the pressure acquisition hole 112 being arranged on running shaft sidewall, the Circumferential oil groove 114 that is arranged on step 70, the communicating passage 116 that extends through step 70, comprises alternatively the pressure acquisition pipe 118 being arranged in pressure acquisition hole 112.But the structure of pressure acquisition passage 110 is not limited to this, but can there are various distortion.For example, Circumferential oil groove 114 can be arranged on running shaft 50, rather than is arranged on step 70.In addition, for example, as shown in Figures 9 and 10, can further between running shaft 50 and fuel level sensor 120, pressure acquisition device 130 be set.In the example of Fig. 9, pressure acquisition device 130 is Circumferential oil groove 114A of being communicated with pressure acquisition hole 112 fluids on running shaft 50 of an annular component and comprising and is communicated with and extends through the communicating passage 116A of pressure acquisition device 130 with Circumferential oil groove 114A fluid.In the example of Figure 10, Circumferential oil groove 114B can be arranged on running shaft 50.The fluid input 122 of fuel level sensor 120 can directly or by other pipelines be communicated with the communicating passage 116A fluid of pressure acquisition device 130.By pressure acquisition device 130 is set, can arrange more neatly fuel level sensor 120, and without the structure of step 70 is modified.
Shown in Figure 11 according in the example of oil level detection of the present invention mechanism.Oil temperature sensor 140 can also be further set.Oil temperature sensor 140 can share a lead-in wire 142 with fuel level sensor 120.Particularly, the signal of lead-in wire 141 and 142 output fuel level sensors 120, and the signal of lead-in wire 142 and 143 output oil temperature sensors.In the present embodiment, not only can control compressor according to the signal of fuel level sensor 120, and can control compressor according to the signal of oil temperature sensor 140.Therefore, for compressor provides duplicate protection.
In embodiment shown in the figure, oil level detection mechanism 100 is communicated with concentric hole 54 fluids.But it should be appreciated by those skilled in the art that described concentric hole 54 can be with replacing along the axially extended non-concentric hole of running shaft 50.In addition,, according to the situation of compressor indoor design, oil level detection mechanism 100 also can be communicated with eccentric opening 56 fluids of running shaft 50.Even if hole 54 or 56 is nonconcentric(al) holes, due to the centrifugal force that running shaft rotation causes, oil level detection of the present invention mechanism still can run well.
In embodiments of the present invention, a kind of pressure transducer that comprises piston, contact and spring has been described as fuel level sensor.It should be appreciated by those skilled in the art that and can adopt any suitable pressure transducer, particularly pressure switch well known in the art, be used as fuel level sensor.
In the above-described embodiment, described that fuel level sensor 120 is arranged in housing 12 and can be directly or be communicated with communicating passage 116 in step 70 or communicating passage 116A fluid in pressure acquisition device 130 by extra pipeline.But the present invention is not limited thereto.As shown in Figure 13 A and 13B, the outside that fuel level sensor 120 can be arranged on housing 12 is by being communicated with by connecting tube 160 and communicating passage 116 in step 70 (or communicating passage) in pressure acquisition device fluid.Connecting tube 160 can be horizontally disposed with (as shown in FIG. 13A) or be obliquely installed (as shown in Figure 13 B).Adopt this structure, the various parts in compressor can be arranged more neatly.
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 of describing in detail and illustrating here, in the situation that not departing from the spirit and scope of the invention, can be realized by those skilled in the art other modification and variant.All these modification and variant all fall within the scope of the present invention.And all members described here can be replaced by the member being equal in other technologies.
Claims (36)
1. a rotary compressor, comprising:
Housing (12), described housing comprises for holding the lubricant oil memory section of lubricant oil;
Be arranged on the compressing mechanism (20) in described housing (12);
Drive the driving mechanism (30) of described compressing mechanism (20), described driving mechanism (30) comprises running shaft (50), in described running shaft (50), be provided with along the axially extended through hole (54 of described running shaft (50), 56), described running shaft (50) is communicated with described lubricant oil memory section fluid by described through hole (54,56); And
The fuel level sensor (120) being communicated with by interior through hole (54, the 56) fluid of pressure acquisition passage (110) and described running shaft (50).
2. rotary compressor as claimed in claim 1, further comprises the step (70) for supporting described running shaft (50),
Wherein said pressure acquisition passage (110) comprising: extend through the sidewall of described running shaft (50) and the pressure acquisition hole (112) being communicated with through hole (54,56) fluid in described running shaft (50), be formed on described running shaft (50) or described step (70) is upper and the Circumferential oil groove (114) being communicated with described pressure acquisition hole (112) fluid and the communicating passage (116) that extends through described step (70) and be communicated with described Circumferential oil groove (114) and described fuel level sensor (120) fluid.
3. rotary compressor as claimed in claim 1, further comprises the pressure acquisition device (130) being arranged between described running shaft (50) and described fuel level sensor (120),
Wherein said pressure acquisition passage (110) comprising: extend through described running shaft (50) sidewall and with described running shaft (50) in through hole (54,56) the pressure acquisition hole (112) that fluid is communicated with, be formed on described running shaft (50) or described pressure acquisition device (130) is upper and Circumferential oil groove (the 114A that is communicated with described pressure acquisition hole (112) fluid, 114B) and the communicating passage (116A) that extends through described pressure acquisition device (130) and be communicated with described Circumferential oil groove (114A, 114B) and described fuel level sensor (120) fluid.
4. rotary compressor as claimed in claim 2 or claim 3, wherein said pressure acquisition passage (110) also comprises and being arranged in described pressure acquisition hole (112) and towards the outstanding pressure acquisition pipe (118) of axis of the through hole (54,56) of described running shaft (50).
5. rotary compressor as claimed in claim 4, the length of wherein said pressure acquisition pipe (118) is determined according to the minimal protection lubricant level in described lubricant oil memory section.
6. rotary compressor as claimed in claim 5, wherein said minimal protection lubricant level is set highlyer, and the length setting of described pressure acquisition pipe (118) must be longer.
7. rotary compressor as claimed in claim 5, meets following relation between wherein said minimal protection lubricant level and the length of described pressure acquisition pipe (118):
Wherein, the height that H is the described minimal protection lubricant level counted from the end face (S0) of described running shaft (50), unit be millimeter;
L is that described pressure acquisition pipe (118) is projected into the length in described running shaft (50), and unit is millimeter;
R is the inside radius of described running shaft (50), and unit is millimeter;
The height of the central axis (S1) that h is the described pressure acquisition pipe (118) counted from the end face (S0) of described running shaft (50), unit be millimeter;
N is the revolution of described running shaft, and unit is rev/min;
G is gravity accleration, and unit is meter per second
2.
8. rotary compressor as claimed in claim 2 or claim 3; wherein said pressure acquisition hole (112) is determined according to the minimal protection lubricant level in described lubricant oil memory section apart from the height of a specific reference surface (S), the end face of the bottom surface that wherein said reference surface (S) is described rotary compressor or described running shaft (50).
9. rotary compressor as claimed in claim 8, wherein said minimal protection lubricant level is set highlyer, and the height setting in described pressure acquisition hole (112) must be higher.
10. rotary compressor as claimed in claim 1, further comprise pump oil machine structure (80), described pump oil machine structure (80) comprises the oil fork (84) in the through hole (54,56) that is arranged on the orifice plate (82) of described running shaft (50) end and is arranged on described running shaft (50).
11. rotary compressors as claimed in claim 1, further comprise pump oil machine structure (80), and described pump oil machine structure (80) comprises the wing pump that is arranged on described running shaft (50) end.
12. rotary compressors as claimed in claim 1, wherein said rotary compressor is that Horizontai rotary compressor and its inner space are separated into high pressure side and low voltage side by acoustical panel, described high pressure side forms described lubricant oil memory section, and
Described rotary compressor further comprises pump oil machine structure (80), and described pump oil machine structure (80) is for extending to the oil pipe of the through hole (54,56) of described running shaft (50) from described lubricant oil memory section.
13. rotary compressors as claimed in claim 1, wherein said through hole (54,56) comprises the concentric hole part (54) concentric with described running shaft (50) and the eccentric opening part (56) of radially setovering with respect to described concentric hole (54).
14. rotary compressors as claimed in claim 1, wherein said fuel level sensor (120) is pressure transducer.
15. rotary compressors as claimed in claim 1, wherein said fuel level sensor (120) is pressure switch.
16. rotary compressors as claimed in claim 1, wherein said fuel level sensor (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.
17. rotary compressors as claimed in claim 16, wherein said hydrodynamic pressure receiving part comprises:
Shell (121), and
Piston head (125) that can axial motion in described shell (121);
Described conversion portion comprises:
Wiring terminal (126),
Be arranged on the first contact (127) and the second contact (128) in described wiring terminal (126), and
Between described piston head (125) and described the second contact (128), provide electric connection and for described piston head (125) provides the spring (129) of restoring force,
Wherein when described piston head (125) contacts with described the first contact (127), described fuel level sensor output electrical signals.
18. rotary compressors as claimed in claim 17, wherein said the first contact (127) comprises the pin portion (127A, 127B) of a plurality of spaced settings.
19. rotary compressors as claimed in claim 17, wherein said the second contact (128) comprises the annular contact disk (128A) electrically contacting with described spring (129).
20. rotary compressors as claimed in claim 1, further comprise oil temperature sensor (140).
21. rotary compressors as claimed in claim 20, wherein said oil temperature sensor (140) has shared lead-in wire (142) with described fuel level sensor (120).
22. rotary compressors as claimed in claim 2, wherein said fuel level sensor (120) is arranged near described step (70).
23. rotary compressors as claimed in claim 2, wherein said fuel level sensor (120) is directly connected with the communicating passage (116) in described step (70).
24. rotary compressors as claimed in claim 2, wherein said fuel level sensor (120) is connected by extra pipeline with the communicating passage (116) in described step (70).
25. rotary compressors as claimed in claim 3, wherein said fuel level sensor (120) is directly connected with the communicating passage (116A) in described pressure acquisition device (130).
26. rotary compressors as claimed in claim 3, wherein said fuel level sensor (120) is connected by extra pipeline with the communicating passage (116A) in described pressure acquisition device (130).
27. rotary compressors as claimed in claim 1, wherein said rotary compressor is scroll compressor or screw compressor or rotor-type compressor.
28. rotary compressors as claimed in claim 2 or claim 3, wherein said fuel level sensor (120) is arranged on described housing (12) inside.
29. rotary compressors as claimed in claim 2, wherein said fuel level sensor (120) is arranged on described housing (12) outside.
30. rotary compressors as claimed in claim 29, wherein said pressure acquisition passage (110) further comprises the connecting tube (160) being communicated with communicating passage (116) fluid in described step (70).
31. rotary compressors as claimed in claim 3, wherein said fuel level sensor (120) is arranged on described housing (12) outside.
32. rotary compressors as claimed in claim 31, wherein said pressure acquisition passage (110) further comprises the connecting tube (160) being communicated with communicating passage (116A) fluid in described pressure acquisition device (130).
33. rotary compressors as described in claim 30 or 32, wherein said connecting tube (160) is horizontally disposed with or is obliquely installed.
34. 1 kinds of rotating machineries, comprising:
Housing, described housing comprises for holding the lubricant oil memory section of lubricant oil;
Be arranged on the running shaft in described housing, be provided with the axially extended through hole along described running shaft in described running shaft, described running shaft is communicated with described lubricant oil memory section fluid by described through hole; And
The fuel level sensor being communicated with vented liquid in described running shaft by pressure acquisition passage.
35. rotating machineries as claimed in claim 34, further comprise for supporting the bearing support of described running shaft,
Wherein said pressure acquisition passage comprises: extend through the sidewall of described running shaft and the pressure acquisition hole being communicated with vented liquid in described running shaft, be formed on described running shaft or described bearing support and the Circumferential oil groove being communicated with described pressure acquisition hole fluid, the communicating passage that extends through described bearing support and be communicated with described Circumferential oil groove and described fuel level sensor fluid.
36. rotating machineries as claimed in claim 34, further comprise the pressure acquisition device being arranged between described running shaft and described fuel level sensor,
Wherein said pressure acquisition passage comprises: extend through the sidewall of described running shaft and the pressure acquisition hole being communicated with vented liquid in described running shaft, be formed on described running shaft or described pressure acquisition device and the Circumferential oil groove being communicated with described pressure acquisition hole fluid, the communicating passage that extends through described pressure acquisition device and be communicated with described Circumferential oil groove and described fuel level sensor fluid.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110104725.1A CN102748295B (en) | 2011-04-18 | 2011-04-18 | Rotary compressor and rotary machine |
| IN1826MUN2013 IN2013MN01826A (en) | 2011-04-18 | 2012-04-18 | |
| EP12773783.1A EP2713054B1 (en) | 2011-04-18 | 2012-04-18 | Rotary compressor and rotation mechanism |
| US14/112,188 US9850900B2 (en) | 2011-04-18 | 2012-04-18 | Rotary compressor and rotation mechanism |
| PCT/CN2012/074247 WO2012142944A1 (en) | 2011-04-18 | 2012-04-18 | Rotary compressor and rotation mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110104725.1A CN102748295B (en) | 2011-04-18 | 2011-04-18 | Rotary compressor and rotary machine |
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| CN102748295A CN102748295A (en) | 2012-10-24 |
| CN102748295B true CN102748295B (en) | 2014-12-03 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103089648B (en) * | 2011-11-07 | 2016-03-30 | 艾默生环境优化技术(苏州)有限公司 | Rotary compressor and control method thereof |
| CN103114986A (en) * | 2013-02-26 | 2013-05-22 | 苏州英华特制冷设备技术有限公司 | Oil level detecting device for compressor |
| CN104061162B (en) * | 2013-03-21 | 2016-05-11 | 艾默生环境优化技术(苏州)有限公司 | Compressor system and control method thereof |
| DK201300213A1 (en) * | 2013-04-11 | 2014-10-12 | Secop Gmbh | A motor drive controller for a compressor |
| US9341187B2 (en) * | 2013-08-30 | 2016-05-17 | Emerson Climate Technologies, Inc. | Compressor assembly with liquid sensor |
| CN105221429B (en) * | 2014-07-02 | 2017-09-12 | 艾默生环境优化技术(苏州)有限公司 | Oil level sensor, rotary compressor and lubricating oil detection method thereof |
| CN105277254A (en) * | 2014-07-24 | 2016-01-27 | 上海日立电器有限公司 | Combined assembly structure and combined assembly method of capacitance-type oil level sensor |
| CN115059435B (en) * | 2022-06-18 | 2023-12-19 | 山东金周石油装备开发有限公司 | Pumping unit balance weight moving equipment |
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