CN208416615U - Expander and fluid circulation system including the same - Google Patents

Abstract

The present disclosure relates to an expander including a housing, an expansion mechanism, an exhaust pipe, an oil pool, and a lubricant discharge passage. An expansion mechanism is disposed within the housing and is configured to expand the high pressure fluid into a low pressure fluid. The exhaust pipe is configured to discharge the low-pressure fluid out of the expander and includes an end portion fitted in the first opening of the casing and having an exhaust port through which the low-pressure fluid enters the exhaust pipe. An oil sump is located within the housing and stores lubricant. The lubricant discharge passage is configured to discharge lubricant in the oil sump into the exhaust pipe and/or an external system line communicating with the exhaust pipe, and includes an inlet end having an inlet at a predetermined oil level of the oil sump and an outlet end having an outlet through which the lubricant entering the lubricant discharge passage is discharged into the exhaust pipe and/or the external system line. The present disclosure also relates to a fluid circulation system including the expander.

Description

Expanding machine and fluid circulating system including expanding machine

Technical field

This disclosure relates to a kind of expanding machine and the fluid circulating system including expanding machine.

Background technique

The content of this part provides only background information relevant to the disclosure, the prior art may not constituted.

Expanding machine is the device for being expanded into low-pressure fluid using high-pressure fluid and exporting mechanical work or electric work outward.It is a kind of common Expanding machine be scroll expander.The expansion mechanism of scroll expander includes dynamic vortex component and determine vortex component.Dynamic vortex portion Part and determine vortex component are engaged with each other to form a series of expansion chamber that volumes are gradually increased between its blade, so that high Pressure fluid becomes low-pressure fluid.Generate driving moment during fluid expansion, for example, band moving axis rotate with export mechanical work or Electric work.

In general, further including the oil sump for being stored with lubricant in expanding machine, lubricant is provided to each related movable member (such as base bearing) is to be lubricated it.In addition, lubricant can be with high-pressure work stream in the system comprising expanding machine Body enters the expansion mechanism of expanding machine, and as expanding machine is discharged in the pressure working fluid after expansion, thus within the system Circulation.The lubricant recycled in systems can be lubricated expansion mechanism.For low-pressure side expanding machine, by Lubricant in oil sump is in environment under low pressure and is difficult to supply into expansion mechanism, therefore expansion mechanism is mainly by being The lubricant recycled in system is lubricated.

However, the lubricant in system can be separated with working fluid when flowing through all parts in expanding machine and be flowed into swollen In oil sump in swollen machine.In that way it is possible to the amount that will lead to oil sump in-lubricant is excessive, and correspondingly, the lubricant recycled in system Amount can be very few.This will lead to the lubrication circumstances deterioration of each correlation movable member, particularly expansion mechanism in expanding machine, thus It influences the normal operating of expanding machine and reduces expansion efficiency.

Therefore, it is necessary to one kind can improve the expanding machine that lubricant is distributed and maintains good lubrication.

Utility model content

One purpose of one or more embodiments of the utility model, which is to provide one kind, can improve lubricant distribution And maintain the expanding machine of good lubrication.

Another purpose of one or more embodiments of the utility model be to provide that a kind of structure is simple and cost compared with Low expanding machine.

One aspect according to the present utility model provides a kind of expanding machine comprising shell, expansion mechanism, exhaust pipe, Oil sump and lubricant passing away.Expansion mechanism, which is arranged inside the shell and is configured to expand high-pressure fluid, becomes lowpressure stream Body.For outlet pipe configuration at by low-pressure fluid discharge expanding machine and including end, the end is fitted in the first opening of shell In and have exhaust outlet, wherein low-pressure fluid enters in exhaust pipe via exhaust outlet.Oil sump is located in shell and is stored with profit Lubrication prescription.Lubricant passing away is configured to the outside that the lubricant in oil sump is expelled to exhaust pipe and/or is connected to exhaust pipe In system pipeline, and lubricant passing away includes the input end with entrance and the outlet end with outlet, wherein entrance At the predetermined oil level of oil sump, exhaust pipe and/or outer is expelled to via outlet into the lubricant in lubricant passing away In portion's system pipeline.

According to above-mentioned expanding machine, due to the provision of the lubrication for being expelled to excessive lubricant from oil sump in exhaust pipe Agent passing away, it is hereby ensured that the amounts of the lubricant in oil sump will not be excessive, while avoiding entering system via exhaust pipe In lubricant will not be very little, thereby guarantee that expansion mechanism is able to good lubrication.In addition, the utility model utilizes Bernoulli effect Lubricant is expelled to exhaust pipe from oil sump by (that is, pressure difference caused by the current difference of working fluid itself), and/or is utilized Oil sump is expelled to exhaust pipe by the pressure drop of resistance loss of pipeline bring, therefore the structure of the expanding machine of the utility model simplifies.

In other examples of the disclosure, the lubricant passing away is provided by individual oil exit pipe.In this way, can keep away Exempt from that certain structures of expanding machine are improved or processed.

In other examples of the disclosure, the oil exit pipe is fixed to the inner wall of the shell.In this way, expanding machine can be made It is compact-sized, to reduce space occupied.

In other examples of the disclosure, aperture is provided on the exhaust pipe, the outlet end of the oil exit pipe is fitted in In the aperture.

In other examples of the disclosure, the exhaust outlet of the aperture of the exhaust pipe close to the end of the exhaust pipe Setting or the distance between the aperture and the exhaust outlet are at least minimum preset distance.At the aperture of exhaust pipe When pressure difference between the pressure of the inlet of pressure and oil exit pipe is enough to be pumped to the lubricant at predetermined oil level in exhaust pipe, The aperture of exhaust pipe is arranged close to exhaust outlet, and the structure of expanding machine can be made more compact.

On the other hand, the aperture of exhaust pipe can be separated by a certain distance with exhaust outlet, and the distance is longer, due to pressure drop So that the pressure at the aperture is lower, thus the pressure difference between the aperture of exhaust pipe and the entrance of oil exit pipe is bigger.According to general Lubricant, which is pumped to the minimum differntial pressure in exhaust pipe from oil sump, can determine that the minimum between the aperture of exhaust pipe and exhaust outlet is pre- Set a distance.Therefore, the aperture of exhaust pipe can be positioned at the position that the distance between exhaust outlet is more than or equal to minimum preset distance Set place.

In other examples of the disclosure, the second opening is additionally provided on the shell, the input end of the oil exit pipe is matched In second opening.

In other examples of the disclosure, it is described second opening be located in a vertical direction it is described first opening just under Side.In other examples of the disclosure, the horizontal plane where the exhaust pipe towards second opening extends described to reduce Difference in height between aperture and second opening.In other examples of the disclosure, the oil exit pipe is horizontally disposed. By reducing the length of oil exit pipe or passing through the difference in height between the aperture of reduction exhaust pipe and the entrance of oil exit pipe, be conducive to Lubricant is pumped in exhaust pipe from oil sump.

In other examples of the disclosure, the lubricant passing away by the shell a part and be fixed to described The plate of described a part of shell limits.In other examples of the disclosure, the plate has arcuate shape.In this way, without pair The shell of expanding machine carries out additional processing or improvement, and is not necessarily to additional installation space.

In other examples of the disclosure, the lubricant passing away is the hole being arranged in the shell.For this Example, it is only necessary to the technique such as drill be carried out to shell, without component is additionally arranged, reduce number of parts, simplified assembling process.

In other examples of the disclosure, the lubricant passing away substantially linearly extends.

In other examples of the disclosure, the outlet of the lubricant passing away is substantially neat with the wall of the exhaust pipe It is flat, or protrude into the inside of the exhaust pipe；And/or the outlet of the lubricant passing away is basically parallel to fluid and exists Flow direction in the exhaust pipe, or obliquely or be vertically oriented along the flow direction.

In other examples of the disclosure, the input end of the lubricant passing away and/or outlet end are linear, or Person is curved.

In other examples of the disclosure, check valve is provided in the lubricant passing away, the check valve is permitted Perhaps fluid flows into the exhaust pipe from the oil sump, but fluid is prevented to be back to the oil sump from the exhaust pipe；And/or Pump, the pump is for the lubricant in the oil sump to be pumped in the exhaust pipe.

In other examples of the disclosure, the expanding machine is low-pressure side expanding machine.

Another aspect according to the present utility model, provides a kind of fluid circulating system, and the fluid circulating system includes upper State expanding machine.

In other examples of the disclosure, the fluid circulating system further include: condenser；Constitute the external system pipe The expanding machine is connected to the entrance of the condenser by the downtake pipe of a part on road, the downtake pipe；And The second exhaust pipe of a part of the external system pipeline is constituted, the outlet of the second exhaust pipe and the condenser connects It connects.The outlet end of the lubricant passing away is connected to the downtake pipe or the second exhaust pipe.According to this The fluid circulating system of utility model can solve lubricant cycling rate too low the problem of leading to expansion mechanism lack of lubrication.

By explanation provided herein, other application fields be will become obvious.It should be understood that being described in this part Particular example and embodiment for illustration purposes only without being attempt to limit the scope of the present disclosure.

Detailed description of the invention

The attached drawing of this part description is for illustration purposes only without being attempt to limit the scope of the present disclosure in any way.

Fig. 1 is a kind of longitudinal section view of exemplary scroll expander.

Fig. 2 a is the longitudinal section view according to the scroll expander of the utility model embodiment.

Fig. 2 b is the appearance diagram of the scroll expander of Fig. 2 a.

Fig. 2 c is the enlarged diagram of a part of the exhaust pipe of the scroll expander of Fig. 2 a.

Fig. 2 d is the enlarged diagram of a part of the input end of the oil exit pipe of the scroll expander of Fig. 2 a.

Fig. 3 is the longitudinal section view according to the scroll expander of another embodiment of the utility model.

Fig. 4 is the longitudinal section view according to the scroll expander of the another embodiment of the utility model.

Fig. 5 is the appearance diagram according to the scroll expander of another embodiment of the utility model.

Fig. 6 is the longitudinal section view according to the scroll expander of the another embodiment of the utility model.

Fig. 7 is the longitudinal section view according to the scroll expander of another embodiment of the utility model.

Fig. 8 a is the schematic diagram for showing the modification of outlet end of oil exit pipe.

Fig. 8 b is the schematic diagram for showing another modification of outlet end of oil exit pipe.

Fig. 9 a is the schematic diagram for showing the modification of input end of oil exit pipe.

Fig. 9 b is the schematic diagram for showing another modification of input end of oil exit pipe.

Figure 10 is the schematic diagram according to the system including expanding machine of the utility model embodiment.

Specific embodiment

Following description is merely exemplary in nature without being attempt to the limitation disclosure, application and purposes.It should be appreciated that In the drawings, corresponding reference number indicates similar or corresponding component and feature.

The essential structure and principle of scroll expander 10 ' described below with reference to accompanying drawings.

As shown in Figure 1, scroll expander (hereinafter also referred to as expanding machine) 10 ' includes the shell 12 of general cylindrical shape, setting 12 one end of shell top cover 14 and the bottom cover 16 of 12 other end of shell is set.16 structure of shell 12, top cover 14 and bottom cover At the shell with enclosure space of scroll expander 10 '.

Scroll expander 10 ' further includes being arranged between top cover 14 and shell 12 so that the inner space of expanding machine to be separated into The partition 15 of high-pressure side (also referred to as high-pressure space) and low-pressure side (also referred to as low-voltage space).It is constituted between partition 15 and top cover 14 High-pressure side, and low-pressure side is constituted between partition 15, shell 12 and bottom cover 16.It is provided in high-pressure side for introducing high-pressure fluid The air inlet pipe 17 of (also referred to as working fluid) is provided with the exhaust pipe 18 for the low-pressure fluid after expanding to be discharged in low-pressure side.

Scroll expander 10 ' further includes the expansion mechanism being made of determine vortex component 80 and dynamic vortex component 70.Dynamic vortex Component 70 can be relative to 80 translation rotation of determine vortex component (that is, the central axis of dynamic vortex component 70 is around determine vortex component 80 Central axis rotation, but dynamic vortex component 70 itself will not be rotated around the central axis of itself).The translation rotation passes through Such as the cross slip-ring (not shown) between determine vortex component 70 and dynamic vortex component 80 is set to realize.

Dynamic vortex component 70 includes end plate 72, the hub 74 for being formed in end plate side and the spiral for being formed in the end plate other side The blade 76 of shape.Determine vortex component 80 includes end plate 82, is formed in the spiral helicine blade 86 of end plate side and is formed in end plate Substantial middle position at entrance 88.In the helical blade 86 of determine vortex component 80 and the helical blade 76 of dynamic vortex component 70 Between form a series of expansion chamber that volumes are gradually increased when mobile to radial outside from radially inner side.

The expansion chamber neighboring entry 88 of radially inner most and be in the sucking pressure essentially identical with the high-pressure fluid of introducing Power, thus also referred to as high pressure chest.The expansion chamber of outermost radial outside is in basic with low-pressure fluid that expansion mechanism will be discharged Identical discharge pressure, thus also referred to as low pressure chamber.Expansion chamber between high pressure chest and low pressure chamber is in suction pressure Between discharge pressure, thus also referred to as middle pressure chamber.

High-pressure fluid enters the high-pressure side in the shell of expanding machine 10 ' via air inlet pipe 17, then enters via entrance 88 Expansion mechanism.High-pressure fluid into expansion mechanism flows through a series of expansion chambers that volume is gradually increased and is inflated and becomes low Press fluid.The low-pressure fluid is expelled to the low-pressure side in the shell of expanding machine 10 ', then via being connected to expanding machine 10 ' The exhaust pipe 18 of shell and be discharged expanding machine 10 '.

Expanding machine 10 ' further includes main bearing seat 40.Main bearing seat 40 is solid relative to shell 12 by suitable fastening means It is fixed.The end plate 72 of dynamic vortex component 70 is supported by main bearing seat 40.

Expanding machine 10 ' can also include rotary shaft (being referred to as output shaft) 30.Rotary shaft 30 is by being arranged in base bearing Base bearing 44 in seat 40 is rotatably supported.One end of rotary shaft 30 is provided with eccentric crank pin 36.Dynamic vortex portion The hub 74 of part 70 drives the crank-pin 36 of rotary shaft 30, so that rotary shaft 30 be made to rotate.When expanding machine 10 ' is run, swollen Swollen mechanism generates driving moment during expanding to fluid, drive the rotation of rotary shaft 30 to export mechanical work or electric work.

Expanding machine 10 ' can also include the generator 20 being made of stator 22 and rotor 24.Stator 22 is fixed to shell 12. Rotor 24 is arranged between stator 22 and rotary shaft 30.Rotor 24 is fixed on the outer peripheral surface of rotary shaft 30, in expanding machine 10 ' As rotary shaft 30 rotates together when operation, so that generator 20 can generate electricity.

Expanding machine 10 ' can also include oil sump 90, be stored with lubricant (lubricating oil) in oil sump 90.As shown, oil sump 90 are located at the bottom of the shell of expanding machine 10 ', that is, it is located at bottom cover 16.The longitudinal axis along rotary shaft is provided in rotary shaft 30 The hole (not shown) and be optionally provided with the hole (not shown) radially extended that line extends.When rotary shaft 30 rotates, profit Lubrication prescription B is supplied at the movable member of such as bearing via the hole of rotary shaft 30.To the lubricant after movable member lubrication In very small part lubricant B1 via exhaust pipe 18 can be discharged expanding machine 10 ' with working fluid, and most of lubricant B2 can be back to oil sump 90.The circulating path of the lubricant supplied from oil sump 90 is schematically shown with dotted arrow in Fig. 1, And it is referred to as circulating path in expanding machine for ease of description.

In addition, being mixed with lubricant A being introduced into the high-pressure fluid in expanding machine 10 ' via air inlet pipe 17.Lubricant A with High-pressure fluid enter expansion mechanism, thus to constitute expansion mechanism determine vortex component 80 and dynamic vortex component 70 moisten It is sliding.Via exhaust pipe 18 expanding machine 10 ' can be discharged with working fluid in most of lubricant A1 in lubricant A, and small part Lubricant A2 is separated with working fluid and is flowed into oil sump 90.It is schematically shown with solid arrow with high-pressure fluid in Fig. 1 The circulating path for the lubricant being externally supplied, and it is referred to as system circulation path for ease of description.

In general, the amount of lubricant A2 is greater than the amount of lubricant B1.In this way, after expanding machine 10 ' runs a period of time, oil The amount of lubricant in pond 90 is more and more, and the amount for the lubricant being expelled in the system including expanding machine via exhaust pipe 18 It is fewer and fewer.It therefore, may when very few via the amount of air inlet pipe 17 into the lubricant of expanding machine 10 ' with high-pressure fluid Lead to the lack of lubrication to expansion mechanism, so that expansion mechanism serious wear, reduces reliability, or even failure.

In order to solve this problem, the use of lubricant passing away 100 is arranged according to Bernoulli effect in expanding machine by inventor The lubricant in oil sump to be expelled in exhaust pipe under the action of pressure difference between exhaust pipe and oil sump.

Fig. 2 a to Fig. 2 d shows the scroll expander 10 according to the utility model embodiment.Scroll expander 10 with it is upper Scroll expander 10 ' is stated the difference is that further including the oil exit pipe for being expelled to the lubricant in oil sump in exhaust pipe 50, oil exit pipe 50 provides above-mentioned lubricant passing away 100.Scroll expander 10 it is identical as above-mentioned scroll expander 10 ' Component be presented with like reference characters, and be not repeated to describe.

As shown in Fig. 2 a to Fig. 2 d, scroll expander 10 further includes oil exit pipe 50.Oil exit pipe 50 includes being connected to expanding machine The input end 53 of 10 shell and the outlet end 51 for being connected to exhaust pipe 18.The input end 53 of oil exit pipe 50 has entrance 532.Row The entrance 532 of oil pipe 50 is positioned approximately at predetermined oil level, so that the lubricant for reaching predetermined oil level is expelled to exhaust pipe 18 In.In this way, can prevent the lubricant in oil sump 90 is more than predetermined oil level, that is, prevent the amount of the lubricant in oil sump 90 excessive. Predetermined oil level can be determined according to service condition, lubricating condition of expansion mechanism of expanding machine etc..The outlet end 51 of oil exit pipe 50 With outlet 511, the lubricant in oil exit pipe 50 is expelled in exhaust pipe 18 via outlet 511.

The first opening 121 is provided on the shell 12 of scroll expander 10, the end 182 of exhaust pipe 18 is fitted in first shell In body opening 121.The end 182 of exhaust pipe 18 has the exhaust outlet 181 towards the inner open of scroll expander 10, so that whirlpool The low-pressure fluid revolved in expanding machine 10 enters in exhaust pipe 18 via exhaust outlet 181.The first shell opening 121 of shell 12 is formed The first opening for being equipped with exhaust pipe 18 of the shell of scroll expander 10.

It is additionally provided with second shell opening 122 on the shell 12 of scroll expander 10, and is provided with bottom on bottom cover 16 Cover gab 162, wherein bottom cover opening 162 is in fluid communication with second shell opening 122.Second shell opening 122 and bottom cover opening The second opening for being equipped with oil exit pipe 50 of the shell of 162 formation scroll expanders 10.The input end 53 of oil exit pipe 50 is equipped In the second opening of shell, specifically it is fitted in the example shown in Fig. 2 d in second shell opening 122.

In the example shown in the series of figures, the input end 53 of oil exit pipe 50 is connected at the lap of shell 12 and bottom cover 16.So And, it should be understood that the input end 53 of oil exit pipe 50 can connect to shell 12 and the nonoverlapping part of bottom cover 16, for example, only It is connected to shell 12 or is only connected to bottom cover 16.Certainly, the position of the input end 53 of oil exit pipe 50 is mainly according to predetermined oil level It is determined.

Aperture 183 can be set on exhaust pipe 18, the outlet end 51 of oil exit pipe 50 is fitted in aperture 183.In Fig. 2 c Shown in example, aperture 183 is arranged in the end 182 of exhaust pipe 18, that is, close to exhaust outlet 181.It should be understood, however, that It is that the position in aperture 183 can change according to actual needs.

According to Bernoulli effect, at the end of exhaust pipe 18 182, the flow velocity of working fluid is larger, thus pressure P1 compared with It is small；And in the second opening of shell, the flow velocity of working fluid is close to zero, therefore pressure P2 is larger.When the oil level of oil sump 90 Cover shell second opening when, the pressure difference between P2 and P1 make the lubricant in oil sump 90 enter oil exit pipe 50 and and then into Enter in exhaust pipe 18.Expanding machine according to the present utility model can optimize the distribution or circulation of lubricating oil by simple structure Path.

Therefore, the pressure difference between P2 and P1 is bigger, is more conducive to for lubricant being pumped in exhaust pipe 18 from oil sump 90.Such as Shown in Fig. 3, aperture 183 can be arranged far from the position of exhaust outlet 181.Working fluid flows to hole from exhaust outlet 181 Mouth 183, pressure drop can be further generated due to fluid resistance loss.In this way, the pressure at aperture 183 is less than at exhaust outlet 181 Pressure, thus further increase the pressure difference between the input end 53 of oil exit pipe 50 and outlet end 51.It can be according to required pressure Thus difference makes a reservation between aperture 183 and exhaust outlet 181 to determine the pressure drop between aperture 183 and exhaust outlet 181 to determine Distance.Therefore, it in the case where preset distance is more than or equal at a distance from aperture 183 is between exhaust outlet 181, then can be sure to be able to It is enough to be pumped to lubricant in exhaust pipe 18 from oil sump 90.

Fig. 4 is the longitudinal section view according to the scroll expander of the another embodiment of the utility model.Vortex shown in Fig. 4 The difference in height between outlet end 51 and input end 53 in expanding machine, by reducing oil exit pipe 50, that is, wanted by reducing pressure difference The fluid potential energy overcome further increases lubricant the ability being pumped in exhaust pipe 18 from oil sump 90.As shown, row Oil pipe 50 is horizontally disposed, that is, in the horizontal plane in predetermined oil level.In other words, the outlet end 51 of oil exit pipe 50 with into Difference in height between mouth end 53 is zero.For this purpose, exhaust pipe 18 extends or is bent downward, that is, prolong towards the horizontal plane of predetermined oil level It stretches or is bent, so that aperture 183 is in the horizontal plane of predetermined oil level.Compared with the example of Fig. 2 a, the example mesoporous of Fig. 4 Mouth 183 can generate biggish pressure drop far from exhaust outlet 181 between aperture 183 and exhaust outlet 181.

In addition, in the example of fig. 4, oil exit pipe 50 can linearly extend, thus there is shorter length.In this way, having Conducive to flow resistance of the reduction lubricant in oil exit pipe 50, therefore it can reduce the pressure difference for overcoming the flow resistance.Subtract The another way of small oil exit pipe is as shown in Figure 2 b, and the second shell opening 122 (the second opening of shell) of barrel-type casing 12 exists The lower section of first shell opening 121 (the first opening of shell) is located in vertical direction.First opening of shell is opened with second Difference in height between mouthful can be true according to carry out such as the flow velocity of working fluid, the operating condition of expanding machine, the lubrication circumstances of movable member It is fixed.

However, it should be understood that the position of the first opening and the second opening of shell can change according to actual needs, That is, the structure of oil exit pipe 50 can change according to the position of the first opening and the second opening.For example, as shown in figure 5, cylinder outer race The first shell opening 121 of body 12 is located at the top of second shell opening 122, while along the circumferential direction interval of barrel-type casing 12 Certain distance is opened, step (particularly, avoiding the support frame of support step main body) is thus for example avoided.

In the example of Fig. 2 a to Fig. 5, oil exit pipe 50 is substantially disposed in the outside of expanding machine.However, it should be understood that row Oil pipe 50 also can be set in the inside of expanding machine.As shown in fig. 6, oil exit pipe 50 is fixed to the inner wall of the shell of expanding machine.? In the example of Fig. 6, the second opening of the input end 53 for installing oil exit pipe 50 of decapsidate can be saved.The outlet of oil exit pipe 50 End 51 can be protruded into exhaust pipe 18, or can be substantially aligned with the lower wall of exhaust pipe 18.In this way, exhaust pipe 18 can be saved On for install oil exit pipe 50 outlet end 51 aperture 183.Since the inside of the shell of expanding machine is arranged in oil exit pipe 50, Therefore it can make the compact-sized of expanding machine, therefore save on installation space.

Fig. 7 is the longitudinal section view according to the scroll expander of another embodiment of the utility model.As shown in fig. 7, in Fig. 7 Example from exemplary in Fig. 6 the difference is that constitute the mode of lubricant passing away 100 different.In the example of Fig. 7 In, lubricant passing away 100 is limited by a part and plate 60 of shell 12.Plate 60 is fixed to described a part of shell 12. Preferably, the arc-shaped shape of plate 60.Plate 60 can be fixed to shell 12 by modes such as welding, adhesives.

It should be understood that the mode for forming above-mentioned lubricant passing away 100 is not limited to manner described herein.Example Such as, lubricant passing away can integrate in shell 12 (shell).Specifically, lubricant passing away, which can be, is arranged in shell Hole in body 12 (shell).

Moreover, it will be understood that the outlet end of lubricant passing away and the setting of outlet can be according to applications And mounting condition etc. is determined.Preferably, the outlet end and outlet of lubricant passing away can be to be conducive to make to moisten The mode that lubrication prescription flows into exhaust pipe is configured.

As shown in Figure 2 c, the outlet 511 of outlet end 51 is substantially flushed with the wall of exhaust pipe, that is, outlet end 51 does not protrude Into the inside of exhaust pipe.As shown in Figure 8 a, outlet end 51 can be protruded into exhaust pipe 18, that is, extend beyond aperture 183.Scheming In the example of 8a, outlet end 51 is approximately perpendicular to the central axis of exhaust pipe 18, that is, outlet 511 is roughly parallel to the center Axis.Fig. 8 b shows another modification of outlet end 51.As shown in Figure 8 b, outlet end 51 has the inside for protruding into exhaust pipe 18 Part 513 is protruded into, and protrudes into part 513 and is bent along flow direction of the fluid in exhaust pipe 18, therefore, protrudes into part 513 are referred to as bending part.Protruding into part 513 may be configured so that outlet 511 is approximately perpendicular in exhaust pipe 18 Mandrel line, that is, so that outlet 511 is orientated along flow direction of the fluid in exhaust pipe 18.It should be understood that lubricant discharge The outlet end in channel and the setting of outlet can have various change, and be not limited to diagram or example as described herein.One In a little examples, other orientations of outlet are also possible.For example, outlet can be inclination relative to the central axis of exhaust pipe 's.The section of the inner passage of outlet end 51 can be designed in the mode for being conducive to for lubricant being expelled in exhaust pipe.

Similarly, the setting of the input end and entrance of lubricant passing away can be according to application and mounting bar Part etc. is determined.Preferably, the input end of lubricant passing away and entrance can be to be conducive to make lubricant from oil sump The mode flowed into lubricant passing away is configured.

As shown in Figure 2 d, the entrance 532 of input end 53 is substantially flushed with shell 12 (shell), that is, input end 53 is not dashed forward Out into the inside of shell.In the example of Fig. 2 d, inside of the entrance 532 towards expanding machine, that is, be approximately perpendicular to lubricant water Plane.As illustrated in fig. 9, input end 53 can protrude into inside expanding machine, that is, extend beyond shell 12 and bottom cover 16 (shell).? In the example of Fig. 9 a, input end 53, which has, protrudes into part 533, and protrudes into part 533 and be bent upward so that entrance 532 is substantially flat Row is in Lubricant levels face.Fig. 9 b shows another modification of input end 53.As shown in figure 9b, input end 53 has decurvation Protrude into part 535.It should be understood that the setting of the input end and entrance of lubricant passing away can have various change, And it is not limited to diagram or example as described herein.For example, protrude into part can be linear and/or entrance relative to Horizontal plane is inclined.The section of the inner passage of input end 53 can be to be conducive to lubricant being pumped to lubricant from oil sump The mode of passing away designs.

Figure 10 shows the schematic diagram of the fluid circulating system using above-mentioned scroll expander.As shown in Figure 10, fluid follows Loop system includes scroll expander 10, is connected to via downtake pipe 186 condenser 11 of scroll expander 10, via second The evaporator that exhaust pipe 188 is connected to the working medium pump 19 of condenser 11 and is connected between working medium pump 19 and scroll expander 10 13.The outlet end of lubricant passing away 100 is connected to second exhaust pipe 188, and the input end of lubricant passing away 100 It is connected to scroll expander 10, for the lubricant for reaching predetermined oil level in scroll expander 10 to be expelled to second exhaust pipe In 188.The outlet end of lubricant passing away 100 is connected to second exhaust pipe 188, lubricant can be prevented to condenser Performance impacts.

As shown in Figure 10, check valve 105 can also be set in lubricant passing away 100.Check valve 105 is configured to permit Perhaps fluid flows into second exhaust pipe 188 from the oil sump 90 of expanding machine 10 and enters in system, but prevents fluid from second exhaust pipe 188 are back to oil sump 90.In addition, can also lubricated in order to ensure lubricant is discharged to second exhaust pipe 188 from oil sump 90 Setting pump (not shown) in agent passing away 100.

It should be understood that fluid circulating system according to the present utility model is not limited to example shown in Fig. 10.For example, profit The outlet end of lubrication prescription passing away 100 can connect to downtake pipe 186.

Herein to description the utility model, by taking vertical low-pressure side scroll expander as an example.Then, it should be understood that The utility model can be adapted for the expanding machine of any suitable type, for example, rotor expansion machine, horizontal expander machine, high-pressure side are swollen Swollen machine etc..

Although the various embodiments and possible some modifications of the disclosure have been described in detail herein, it should be appreciated that this The open specific embodiment for being not limited to be described in detail and show here.In diagram and implementations described above Each feature can be combined with each other in the absence of conflict, or can save.In the spirit and scope without departing from the disclosure In the case where may be effected by one skilled in the art other modifications and variant.All these modifications and variant both fall within this reality With in novel range.Moreover, all components described herein, component or feature can be by other structures and functionally etc. With component, component or feature replace.

Claims (19)

1. a kind of expanding machine, characterized by comprising:

Shell；

Expansion mechanism, the expansion mechanism, which is arranged in the shell and is configured to expand high-pressure fluid, becomes lowpressure stream Body；

Exhaust pipe, the outlet pipe configuration is at by the low-pressure fluid discharge expanding machine and including end, the end It is fitted in the first opening of the shell and there is exhaust outlet, wherein the low-pressure fluid enters institute via the exhaust outlet It states in exhaust pipe；

Oil sump, the oil sump are located in the shell and are stored with lubricant；And

Lubricant passing away, the lubricant passing away are configured to the lubricant in the oil sump being expelled to the exhaust In pipe and/or the external system pipeline being connected to the exhaust pipe, and the lubricant passing away includes having entrance Input end and outlet end with outlet, wherein the entrance is located at the predetermined oil level of the oil sump, into the lubricant Lubricant in passing away is expelled in the exhaust pipe and/or the external system pipeline via the outlet.

2. expanding machine according to claim 1, which is characterized in that the lubricant passing away is mentioned by individual oil exit pipe For.

3. expanding machine according to claim 2, which is characterized in that the oil exit pipe is fixed to the inner wall of the shell.

4. expanding machine according to claim 2, which is characterized in that be provided with aperture, the oil exit pipe on the exhaust pipe Outlet end be fitted in the aperture.

5. expanding machine according to claim 4, which is characterized in that the aperture of the exhaust pipe is close to the exhaust pipe End exhaust outlet setting or the distance between the aperture and the exhaust outlet be at least minimum preset distance.

6. expanding machine according to claim 4, which is characterized in that be additionally provided with the second opening, the row on the shell The input end of oil pipe is fitted in second opening.

7. expanding machine according to claim 6, which is characterized in that second opening is located in described in a vertical direction The underface of first opening.

8. expanding machine according to claim 6, which is characterized in that the water where the exhaust pipe towards second opening Plane extends to reduce the difference in height between the aperture and second opening.

9. expanding machine according to claim 8, which is characterized in that the oil exit pipe is horizontally disposed.

10. expanding machine according to claim 1, which is characterized in that the lubricant passing away is by the one of the shell Part and the plate of the described a part for being fixed to the shell limit.

11. expanding machine according to claim 10, which is characterized in that the plate has arcuate shape.

12. expanding machine according to claim 1, which is characterized in that the lubricant passing away is setting described outer Hole in shell.

13. expanding machine according to any one of claim 1 to 12, which is characterized in that the lubricant passing away base Linearly extend in sheet.

14. according to claim 1 to expanding machine described in any one of 2 and 4 to 9, which is characterized in that the lubricant discharge The wall of the entrance in channel and the shell is substantially flush or the input end of the lubricant passing away protrudes into the shell It is internal.

15. expanding machine according to claim 14, which is characterized in that the outlet of the lubricant passing away and the row The wall of tracheae is substantially flush or the outlet end of the lubricant passing away includes the bending for protruding into the inside of the exhaust pipe Part is orientated the outlet along flow direction of the fluid in the exhaust pipe.

16. according to claim 1 to expanding machine described in any one of 12, which is characterized in that logical in lubricant discharge Check valve is provided in road, the check valve allows fluid to flow into the exhaust pipe from the oil sump, but prevents fluid from institute It states exhaust pipe and is back to the oil sump；And/or pump, the pump is for being pumped to the exhaust pipe for the lubricant in the oil sump In.

17. according to claim 1 to expanding machine described in any one of 12, which is characterized in that the expanding machine is low-pressure side Expanding machine.

18. a kind of fluid circulating system, which is characterized in that the fluid circulating system includes: to appoint according to claim 1 in 17 Expanding machine described in one.

19. fluid circulating system according to claim 18, which is characterized in that the fluid circulating system further include:

Condenser；

The downtake pipe of a part of the external system pipeline is constituted, the expanding machine is connected to by the downtake pipe The entrance of the condenser；And

Constitute the second exhaust pipe of a part of the external system pipeline, the outlet of the second exhaust pipe and the condenser Connection,

Wherein, the outlet end of the lubricant passing away is connected to the downtake pipe or the second exhaust pipe.