CN207777176U - Low back pressure compressor - Google Patents

Abstract

The utility model discloses a kind of low back pressure compressors, low back pressure compressor includes shell, compression mechanism and gas and oil separating plant, compression mechanism is arranged in shell, there is compression chamber and high pressure gas chamber in compression mechanism, gas and oil separating plant is cyclone type oil air separation, and gas and oil separating plant, which is arranged to act on the gaseous coolant for entering the carrying lubricating oil in gas and oil separating plant using cyclonic separation, carries out Oil-gas Separation.The exhaust of high pressure gas intracavitary can be carried out Oil-gas Separation, and the lubricating oil of separation is delivered to the moving component of low-pressure side by low back pressure compressor according to the present utility model, ensured lubricating oil smooth circulation, ensured the reliability and working performance of low back pressure compressor.

Description

Low back pressure compressor

Technical field

The utility model is related to compressor fields, in particular to a kind of low back pressure compressor.

Background technology

In existing low back pressure compressor, the more difficult oil sump for flowing back to low-pressure side of lubricating oil of high-pressure side exhaust separation, from And cause the lubrication oil circulation of low back pressure compressor more difficult.On the one hand cause more oil accumulation in high-pressure side as a result, makes Lubricants capacity in winner's oil sump is insufficient, influences fuel feeding effect, causes the deterioration of compressor performance and reliability.

On the other hand, after on high-tension side oil mass increase, on high-tension side lubricating oil can be together discharged into compressed gas to cycle System influences system energy efficiency.In addition, a large amount of refrigerant can be dissolved on high-tension side lubricating oil, to cause the refrigeration of system Performance is greatly reduced.

Utility model content

The utility model is intended to solve at least some of the technical problems in related technologies.For this purpose, this reality A kind of low back pressure compressor can guarantee lubricating oil smooth circulation at least to a certain extent is proposed with novel.

It is described according to low back pressure compressor described in the utility model, including shell, compression mechanism and gas and oil separating plant Compression mechanism is arranged in the shell, has compression chamber and high pressure gas chamber, the Oil-gas Separation dress in the compression mechanism It is set to cyclone type oil air separation, the gas and oil separating plant is arranged to entering the carrying in the gas and oil separating plant The gaseous coolant of lubricating oil is acted on using cyclonic separation and carries out Oil-gas Separation.

According to low back pressure compressor described in the utility model, can the exhaust of high pressure gas intracavitary be subjected to oil gas point From, and the lubricating oil of separation is delivered to the moving component of low-pressure side, ensure lubricating oil smooth circulation, ensures low back pressure compressor Reliability and working performance.

According to low back pressure compressor described in the utility model, the gas and oil separating plant is arranged except the shell.

According to low back pressure compressor described in the utility model, the gas and oil separating plant includes shell portion, inlet tube and goes out Mouth is managed, and has cyclonic separation chamber in the shell portion, and the inlet tube is arranged in the shell portion and the connection cyclonic separation chamber, The input end of the inlet tube is connected with the high pressure gas chamber, and the outlet is arranged in the shell portion and the connection rotation Wind disengagement chamber, wherein the gaseous coolant of the carrying lubricating oil entered from the inlet tube is moved in the cyclonic separation chamber inside spin To carry out Oil-gas Separation, the gaseous coolant after separation is discharged from the outlet and the lubricating oil after detaching is collected in the shell portion It is interior.

Further, the inlet tube and the connection end of the cyclonic separation chamber are divided higher than the outlet and the whirlwind Connection end from chamber.

Further, horizontally connected in the shell portion, the outlet vertically wears described the inlet tube The roof in shell portion.

Further, the inner peripheral surface of the cyclonic separation chamber is cylindrical surface, and the inlet tube and the cylindrical surface are tangent.

Further, the outlet is concentrically connected with the shell portion.

Further, the collection portion of funnel is narrowed in the bottom in the shell portion, and the collection portion is used to collect lubricating oil, It is provided with oil collecting pipe at the collection portion.

Optionally, obtained lubricating oil is exported to the movement of the compression mechanism after being detached by the gas and oil separating plant Component, to lubricate the moving component.

Further, the compression mechanism includes base bearing, cylinder, supplementary bearing, bent axle and cover board, is had in the cylinder The compression chamber, the cover board setting form the high pressure gas chamber on the supplementary bearing and between the supplementary bearing.

Further, the surface of the cover board is formed with high pressure sump, and the high pressure sump is received by the oil gas point Lubricating oil from device resulting separation, and the lubricating oil in the high pressure sump can be conveyed to the moving component.

Further, the low back pressure compressor further includes oil return component, and the oil inlet end of the oil return component is extend into In the high pressure sump, the oil outlet end of the oil return component is opened wide towards the moving component.

Further, the oil return component includes oil return pipe and the oil return hole that is formed in the supplementary bearing, described time It is inserted into tubing section in the oil return hole, the lower end of the oil return pipe is oil inlet end and extend into the high pressure sump, institute The upper end for stating oil return hole is oil outlet end and towards the moving component.

Further, there is the bent axle countershaft section, the supplementary bearing to have Curved shaft support portion, the Curved shaft support portion Corresponding with the countershaft section and for supporting the countershaft section, the oil outlet end of the oil return hole is through the interior of the Curved shaft support portion Circumferential surface, and be spaced apart between the inner peripheral surface in the Curved shaft support portion and the peripheral surface of the countershaft section narrow to form the first oil return Seam, the first oil return slit are connected to the oil return hole and the low pressure oil sump below the first oil return slit.

Further, the oil return hole is formed in the bent axle of the supplementary bearing in such a way that the relatively described supplementary bearing is inclined In support portion, the center line of the oil return hole and the angle of the supplementary bearing are 20 ° -70 °, and the oil return pipe is with identical inclination Mode, which is partially embedded into, to be fixed in the oil return hole.

Further, " L " shape oil duct is provided in the supplementary bearing, the low back pressure compressor further includes middle oil Pipe, the intermediate oil pipe are partially inserted into a horizontal manner in the horizontal segment of described " L " shape oil duct, " L " the shape oil duct Vertical section is connected to the horizontal segment and the high pressure sump of lower section, the part outside the stretching supplementary bearing of the intermediate oil pipe It is also pierced by the shell outward and is connected with the gas and oil separating plant.

According to low back pressure compressor described in the utility model, the low back pressure compressor further includes oil return component, described The oil inlet end of oil return component is connected with the gas and oil separating plant, and the oil outlet end of the oil return component is spacious towards the moving component It opens.

Further, the oil return component includes oil return pipe and the oil return hole that is formed in the supplementary bearing, the oil return It is inserted into tube portion in the oil return hole, the outer end of the oil return pipe is oil inlet end and connects the gas and oil separating plant, described The inner end of oil return hole is oil outlet end and towards the moving component.

Further, there is the bent axle countershaft section, the supplementary bearing to have Curved shaft support portion, the Curved shaft support portion Corresponding with the countershaft section and for supporting the countershaft section, the oil outlet end of the oil return hole is through the interior of the Curved shaft support portion Circumferential surface, and be spaced apart between the inner peripheral surface in the Curved shaft support portion and the peripheral surface of the countershaft section narrow to form the first oil return Seam, the first oil return slit are connected to the oil return hole and the low pressure oil sump below the first oil return slit.

Further, the oil return hole is formed in the mode perpendicular to the bent axle in the supplementary bearing, described time Oil pipe insertion is fixed in the oil return hole.

According to low back pressure compressor described in the utility model, the low back pressure compressor further includes oil return pipe, described time One end of oil pipe is connected with the gas and oil separating plant and the tail portion oil storage of the other end and the tail portion of the sliding vane groove in the cylinder Slot is connected, and the slide plate in the sliding vane groove forms the suction for aspirating lubricating oil in the gas and oil separating plant by reciprocating motion Power.

Further, it is formed with the second oil return slit in the slide plate and the sliding vane groove, the second oil return slit One end is connected to the tail portion oil storage tank and the other end extends to the inner peripheral surface of the cylinder.

Further, the tail portion oil storage tank is connected to pressure at expulsion, and the outer end sealing of the sliding vane groove.

According to low back pressure compressor described in the utility model, the low back pressure compressor further includes decompressor, described One end of decompressor is connected with the gas and oil separating plant and the other end is connected with the low pressure oil sump in the shell.

Further, the decompressor is external outside the shell, and the decompressor is capillary or pressure reducing valve.

According to low back pressure compressor described in the utility model, pore, the capillary are formed in the compression mechanism The outlet end in hole is connected with the low pressure oil sump of the shell and input end receives the lubricating oil that the gas and oil separating plant detaches.

Further, the compression mechanism includes base bearing, cylinder, supplementary bearing, bent axle and cover board, is had in the cylinder The compression chamber, the cover board setting form the high pressure gas chamber on the supplementary bearing and between the supplementary bearing, often A part for a pore is formed on the cover board and another part is formed on the supplementary bearing, on the supplementary bearing Be also formed with lateral aperture, the lateral aperture is connected to the pore, is plugged with oil return pipe in the lateral aperture, the oil return pipe to It is pierced by the shell outside and is connected with the gas and oil separating plant.

The additional aspect and advantage of the utility model will be set forth in part in the description, partly will be from following description In become apparent, or recognized by the practice of the utility model.

Description of the drawings

The above-mentioned and/or additional aspect and advantage of the utility model will in the description from combination following accompanying drawings to embodiment Become apparent and is readily appreciated that, wherein：

Fig. 1 is the structural schematic diagram of the gas and oil separating plant in the utility model embodiment 1-6；

Fig. 2 is in Fig. 1 along the sectional view in the directions A-A；

Fig. 3 is the structural schematic diagram of the low back pressure compressor of the utility model embodiment 1；

Fig. 4 is the structural schematic diagram of the low back pressure compressor of the utility model embodiment 2；

Fig. 5 is the enlarged drawing at B in Fig. 4；

Fig. 6 is the structural schematic diagram of the low back pressure compressor of the utility model embodiment 3；

Fig. 7 is the structural schematic diagram of the low back pressure compressor of the utility model embodiment 4；

Fig. 8 is the structural schematic diagram of the low back pressure compressor of the utility model embodiment 5；

Fig. 9 is the structural schematic diagram of the low back pressure compressor of the utility model embodiment 6.

Reference numeral：

Low back pressure compressor 100, the first oil return slit 101, the second oil return slit 102, shell 1, compression mechanism 2, compression Chamber 201, high pressure gas chamber 202, high pressure sump 203, sliding vane groove 208, tail portion oil storage tank 209, base bearing 21, cylinder 22, countershaft Hold 23, Curved shaft support portion 231, bent axle 24, countershaft section 241, cover board 25, slide plate 26, support spring 27, gas and oil separating plant 4, shell Portion 41, collection portion 411, inlet tube 42, outlet 43, cyclonic separation chamber 44, oil collecting pipe 45, oil return component 5, oil return pipe 51 return Oilhole 52, low pressure oil sump 6, " L " shape oil duct 7, intermediate oil pipe 8, capillary 91, pressure reducing valve 92, pore 93.

Specific implementation mode

The embodiments of the present invention are described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning Same or similar element or element with the same or similar functions are indicated to same or similar label eventually.Below by ginseng The embodiment for examining attached drawing description is exemplary, it is intended to for explaining the utility model, and should not be understood as to the utility model Limitation.

In the description of the present invention, it should be understood that term "upper", "lower", "vertical", "horizontal", "top", The orientation or positional relationship of the instructions such as "bottom", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, merely to just In description the utility model and simplify description, specific side must be had by not indicating or implying the indicated device or element Position, with specific azimuth configuration and operation, therefore should not be understood as limiting the present invention.

In addition, term " first ", " second " are used for description purposes only, it is not understood to indicate or imply relative importance Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or Implicitly include one or more this feature.In the description of the present invention, the meaning of " plurality " is at least two, example Such as two, three etc., unless otherwise specifically defined.

In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " Gu It is fixed " etc. terms shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；Can be Mechanical connection can also be electrical connection or can communicate with one another；It can be directly connected, the indirect phase of intermediary can also be passed through Even, can be the interaction relationship of the connection or two elements inside two elements.For those of ordinary skill in the art For, the concrete meaning of above-mentioned term in the present invention can be understood as the case may be.

The utility model is described below in conjunction with the accompanying drawings and with reference to specific embodiment.

Fig. 1-Fig. 9 is combined to describe 6 embodiments of the low back pressure compressor 100 of the utility model embodiment first.

Embodiment 1

As shown in Figure 1-Figure 3, the low back pressure compressor 100 of the utility model embodiment may include shell 1, compression mechanism 2 and gas and oil separating plant 4.Compression mechanism 2 can be arranged in shell 1, can have compression chamber 201 and height in compression mechanism 2 Pressure air cavity 202 can be simultaneously final via high pressure gas chamber 202 after low-pressure gas is compressed to high pressure gas via compression chamber 201 Drain into the refrigeration equipment outside shell 1.

As Figure 1-Figure 2, gas and oil separating plant 4 can carry out compressed high pressure gas Oil-gas Separation, oil gas point Can be cyclone type oil air separation 4 from device 4, gas and oil separating plant 4 can be arranged to entering gas and oil separating plant 4 The gaseous coolant of interior carrying lubricating oil is acted on using cyclonic separation carries out Oil-gas Separation.

In other words, the high pressure gas for carrying lubricating oil enters and can surround gas and oil separating plant 4 after gas and oil separating plant 4 Internal face circles round around Fig. 1 dotted arrows direction and rotates, at this time since there are density variation, lubrications between lubricating oil and high pressure gas Oil will be attached on the inner wall of gas and oil separating plant 4 when circling round and rotating due to centrifugal action, to which lubricating oil will not be with high pressure Gas effluent oil air separation 4 flows out outlet 43, and lubricating oil can flow downward simultaneously under self gravitation effect along wall surface It collects in gas and oil separating plant 4, and then is recycled in low back pressure compressor 100.

It can be recycled according to the low back pressure compressor 100 of the utility model embodiment by the way that gas and oil separating plant 4 is arranged The lubricating oil drop to dissociate in high pressure gas, to make lubricating oil in 100 internal circulation flow of low back pressure compressor.A side as a result, Face avoids after high pressure gas enters refrigeration equipment, and the lubricating oil that high pressure gas carries dissolves refrigerant, ensure that refrigeration equipment Refrigeration performance.On the other hand, lubricating oil can lubricate after being collected by gas and oil separating plant 4 for the moving component of compression mechanism 2, Ensure 100 reliable operation of low back pressure compressor.

Moreover, the gas and oil separating plant 4 of the present invention utilizes cyclonic separation principle, gas mixture to enter Oil-gas Separation dress Pass through screw after setting in 4 so that gaseous coolant and liquid oil droplet are detached, and good separating effect.

Specifically, as shown in figure 3, gas and oil separating plant 4 can be arranged except shell 1, high pressure gas can flow out Gas and oil separating plant 4 is flowed into after shell 1 and carries out Oil-gas Separation, and the high pressure gas after separation can be flowed to from gas and oil separating plant 4 Refrigeration equipment, the lubricating oil after separation, which can be flowed back to from gas and oil separating plant 4 in shell 1, to be continued cycling through.External Oil-gas Separation Device 4 can be in the original construction of compressor to the maximum extent so that the change of compressor prototectonics is smaller, improves versatility.Shell It can be that compression mechanism 2 provides bigger installation space in body 1, be convenient for the installation of compression mechanism 2.

Specifically, as shown in figure 3, gas and oil separating plant 4 may include shell portion 41, inlet tube 42 and outlet 43, shell portion There can be cyclonic separation chamber 44 in 41.Inlet tube 42 can be arranged in shell portion 41 and be connected to cyclonic separation chamber 44, inlet tube 42 input end can be connected with high pressure gas chamber 202, and outlet 43 is arranged in shell portion 41 and connection cyclonic separation chamber 44, takes High pressure gas with lubricating oil, which enters after cyclonic separation chamber 44, can surround the internal face in shell portion 41 and rotate so that lubricating oil from It is attached on the inner wall in shell portion 41 under heart effect, wherein the gaseous coolant of the carrying lubricating oil entered from inlet tube 42 is in whirlwind point It being moved from 44 inside spin of chamber to carry out Oil-gas Separation, the gaseous coolant after separation can be discharged from outlet 43, and after detaching Lubricating oil may collect in shell portion 41.

Specifically, as shown in Figure 1, inlet tube 42 and the connection end of cyclonic separation chamber 44 can be higher than outlet 43 and whirlwind The connection end of disengagement chamber 44.In other words, high pressure gas needs to move downward certain after inlet tube 42 enters cyclonic separation chamber 44 It can enter outlet 43 from the Connectivity Section of outlet 43 after distance to flow out cyclonic separation chamber 44.Thus, it is possible to ensure high pressure Gas moves downward certain distance in the rotation of cyclonic separation chamber 44, ensures oil gas separation.

More specifically, as shown in Fig. 2, inlet tube 42 can be horizontally connected in shell portion 41, outlet 43 can erect The roof in shell portion 41 directly is worn, the inner peripheral surface of cyclonic separation chamber 44 can be cylindrical surface, so as to flow into shell portion from inlet tube 42 High pressure gas in 41 and prevents from flowing into shell from high pressure gas from inlet tube 42 along the flowing that rotates in a circumferential direction of the cross section in shell portion 41 Shell portion 41 is flowed out from outlet 43 immediately behind portion 41, ensures that high pressure gas moves downward a spacing in the rotation of cyclonic separation chamber 44 From to ensure oil gas separation.

More specifically, inlet tube 42 can be tangent with the cross section in shell portion 41, is flowed with being further ensured that from inlet tube 42 Enter the flowing that rotates in a circumferential direction of high pressure gas in shell portion 41 along the cross section in shell portion 41, increases oil gas separation.

More specifically, as shown in Figure 1, outlet 43 can concentrically be connected with shell portion 41, i.e. the center of outlet 43 Axis can be overlapped with the central axis in cylindrical shell portion 41, to ensure the high pressure gas of flowing in shell portion 41 equably from Outlet 43 flows out shell portion 41.

Specifically, as shown in figures 1 and 3, the bottom in shell portion 41 can narrow the collection portion 411 of funnel, collection portion Oil collecting pipe 45 can be provided at 411, being attached to the lubricating oil after the separation of 41 peripheral wall of shell portion can be under the effect of gravity along shell 1 peripheral wall of body, which flows downward, is concentrated to collection portion 411, and flows back in shell 1 and continue cycling through from oil collecting pipe 45.

Optionally, as shown in figure 3, obtained lubricating oil is exported to compression mechanism 2 after being detached by gas and oil separating plant 4 Moving component (such as bent axle 24), to lubricating movement part.

Specifically, as shown in figure 3, compression mechanism 2 may include base bearing 21, cylinder 22, supplementary bearing 23, bent axle 24 and lid Plate 25, base bearing 21, cylinder 22, supplementary bearing 23 and cover board 25 can be bonded setting from the top down, and bent axle 24 can be worn successively Base bearing 21, cylinder 22, supplementary bearing 23 and cover board 25.Compression chamber 201 can be located in cylinder 22, and bent axle 24 can wear compression Chamber 201, high pressure gas chamber 202 can be formed between supplementary bearing 23 and cover board 25.

More specifically, as shown in figure 3, low back pressure compressor 100 can also include oil return component 5, oil return component 5 into Oily end can be stretched out outside shell 1, and the oil outlet end of oil return component 5 can be opened wide with orientation movements component.Since moving component is moving When will produce negative pressure, and the gas in gas and oil separating plant 4 is compressed high pressure gas, to storage in gas and oil separating plant 4 The lubricating oil deposited can flow to moving component under the differential pressure action of moving component and gas and oil separating plant 4 by oil return component 5.

More specifically, as shown in figure 3, oil return component 5 may include oil return pipe 51 and be formed in supplementary bearing 23 return Oilhole 52, oil return pipe 51 can be inserted partially into oil return hole 52, and the outer end of oil return pipe 51 can be oil inlet end and can stretch out Outside shell 1, the inner end of oil return hole 52 can be oil outlet end and can be with orientation movements component, the profit in gas and oil separating plant 4 as a result, Lubricating oil can be flowed to by oil return pipe 51 in oil return hole 52, and finally be delivered to moving component.

More specifically, as shown in figure 3, bent axle 24 can have countershaft section 241, supplementary bearing 23 that can have Curved shaft support Portion 231, Curved shaft support portion 231 can be corresponding with countershaft section 241 and for supporting countershaft section 241, i.e. Curved shaft support portion 231 can be with It is circumferentially positioned at 241 outside of countershaft section, the oil outlet end of oil return hole 52 can run through the inner peripheral surface in Curved shaft support portion 231, and bent It can be spaced apart between the inner peripheral surface of shaft supporting part 231 and the peripheral surface of countershaft section 241 to form the first oil return slit of annular 101, the first oil return slit 101 can be connected to oil return hole 52 and the low pressure oil sump 6 positioned at 101 lower section of the first oil return slit.

In other words, lubricating oil can flow to the first oil return slit 101 via oil return hole 52, and to the first oil return slit 101 The bent axle 24 of place's rotation is lubricated, and subsequent lubricating oil can flow to low below the first oil return slit 101 under its own gravity Pressure oil pond 6, to carry out the cycle of lubricating oil next time.

More specifically, as shown in figure 3, oil return hole 52 can be formed in supplementary bearing 23 in a manner of perpendicular to bent axle 24 Interior, the lubricating oil in oil return hole 52 can more successfully flow into the first oil return slit 101 as a result, while reduce difficulty of processing.

Embodiment 2

As shown in Figure 4 and Figure 5, the surface of cover board 25 could be formed with high pressure sump 203, and high pressure sump 203 is for collecting Lubricating oil in gas and oil separating plant 4, and the lubricating oil in high pressure sump 203 can be conveyed to moving component.High pressure oil as a result, The lubricating oil collected from gas and oil separating plant 4 can temporarily be gathered and be stored to slot 203, be delivered to lubricating oil consequently facilitating concentrating Moving component, to ensure the lubrication to moving component.Optionally, moving component can be bent axle 24.

More specifically, as shown in Figure 4 and Figure 5, " L " shape oil duct 7 can be provided in supplementary bearing 23, " L " shape oil duct 7 can With with horizontal segment (being parallel to cover board) and vertical section (perpendicular to cover board), vertical section can be located at the inside of horizontal segment and with height Pressure oil groove 203 is connected, and the setting of " L " shape oil duct 7 can be effectively formed oil sealing so that is supplied to moving component by oil return component 4 The lubricating oil given is relatively reliable, prevents high pressure gas from influencing oil gas separation by the path is sucked back into.

As shown in Figure 4 and Figure 5, low back pressure compressor 100 can also include intermediate oil pipe 8, and the inside of intermediate oil pipe 8 can be with It is partially inserted into horizontal segment in a horizontal manner, vertical section can be connected to horizontal segment and the high pressure sump 203 of lower section, middle oil The outside of pipe 8 can be stretched out outside supplementary bearing 23 and be pierced by shell 1 outward and be connected with gas and oil separating plant 4.Oil-gas Separation as a result, Lubricating oil in device 4 can be flowed by intermediate oil pipe 8 in high pressure sump 203.

More specifically, as shown in Figure 4 and Figure 5, low back pressure compressor 100 can also include oil return component 5, oil return component 5 oil inlet end can be extend into high pressure sump 203, and the oil outlet end of oil return component 5 can be opened wide with orientation movements component.As a result, Since high pressure sump 203 is located in high pressure gas chamber 202, the air pressure of high pressure sump 203 is higher than the pressure where moving component, together When moving component will produce negative pressure during exercise, to high pressure sump 203 store lubricating oil can be in moving component and high pressure Moving component is flowed to by oil return component 5 under the differential pressure action of oil groove 203.

More specifically, as shown in Figure 4 and Figure 5, oil return component 5 may include oil return pipe 51 and be formed in supplementary bearing 23 Oil return hole 52, oil return pipe 51 can be inserted partially into oil return hole 52, and the lower end of oil return pipe 51 can be oil inlet end and can be with It extend into high pressure sump 203, the upper end of oil return hole 52 can be oil outlet end and can be with orientation movements component, high pressure oil as a result, Lubricating oil in slot 203 can be flowed to by oil return pipe 51 in oil return hole 52, and finally be delivered to moving component.

More specifically, as shown in Figure 4 and Figure 5, oil return hole 52 can be with respect to supplementary bearing 23 obliquely with oil return pipe 51 It is formed in Curved shaft support portion 231, and oil return hole 52 is identical as the angle of inclination of oil return pipe 51.The center line of oil return hole 52 and pair The angle of bearing 23 can be 20 ° -70 °, and oil return component 5 can be using overall construction as beeline channel, to high pressure sump as a result, Lubricating oil in 203 can be smoothly through oil return component 5 and flow into the first oil return slit 101, in addition tilt the oil return opened up Hole 52 can also reduce the influence to 23 intensity of supplementary bearing due to trepanning.

The other technical characteristics of embodiment 2 are identical as in embodiment 1, and details are not described herein.

Embodiment 3

As shown in fig. 6, one end of oil return pipe 51 can be connected with gas and oil separating plant 4, and the other end of oil return pipe 51 can To be connected with the tail portion oil storage tank 209 of the tail portion of the sliding vane groove 208 in cylinder 22, support spring 27 can push slide plate 26 in cunning It is moved back and forth in film trap 208, when the slide plate 26 in sliding vane groove 208 moves back and forth, pressure reduces in sliding vane groove 208, to sliding The pressure of film trap 208 is less than the pressure of gas and oil separating plant 4, and the lubricating oil in gas and oil separating plant 4 passes through under differential pressure action Oil return pipe 51 flows to sliding vane groove 208.

Specifically, as shown in fig. 6, could be formed with the second oil return slit 102 in slide plate 26 and sliding vane groove 208, second time One end of oily slit 102 can be connected to tail portion oil storage tank 209 and the other end can extend to the inner peripheral surface of cylinder 22.It slides as a result, Piece 26 can be driven the lubricating oil in tail portion oil storage tank 209 extremely by the second oil return slit 102 when movement in sliding vane groove 208 In first oil return slit 101, to which lubricating oil can simultaneously be lubricated slide plate 26 and bent axle 24, low back pressure is further increased The functional reliability of compressor 100.

More specifically, as shown in fig. 6, tail portion oil storage tank 209 can be connected to gas and oil separating plant 4 to be connected to exhaust pressure Power, and the outer end of sliding vane groove 208 can be sealed to be isolated with the low-voltage space where the low pressure oil sump 6 in shell 1.It slides as a result, There are elevated pressures, i.e. compression chamber 201 where the first oil return slit 101 and the pressure difference in sliding vane groove 208 at this time in film trap 208 It is smaller, lubricating oil is driven from sliding vane groove 208 to the first oil return slit 102 convenient for slide plate 26.

The other technical characteristics of embodiment 3 are identical as in embodiment 1, and details are not described herein.

Embodiment 4

As shown in fig. 7, oil return hole 52 can be horizontally placed to lateral aperture, oil return hole 52 can be blind hole, i.e. oil return hole 52 Inner end do not penetrate through the inner peripheral surface of supplementary bearing, at least one pore 93 can be communicated between oil return hole 52 and low pressure oil sump 6, When gas and oil separating plant 4 is flowed by oil return pipe 51 in shell 1, moving component can not be flowed to, to the profit in oil return hole 52 Lubricating oil flows into low pressure oil sump 6 by pore 93, and lubricating oil can reduce pressure when being flowed in pore 93, in order to store In low pressure oil sump 6.

More specifically, as shown in fig. 7, pore 93 can be vertically arranged with oil return hole 52, to which lubricating oil is in capillary The flow direction in hole 93 is identical as its own gravity direction, to which more convenient lubricating oil is in the flowing of pore 93.

The other technical characteristics of embodiment 4 are identical as in embodiment 1, and details are not described herein.

Embodiment 5

As shown in figure 8, gas and oil separating plant 4 can be directly connected to low pressure oil sump 6, to the profit of gas and oil separating plant 4 Lubricating oil can be flowed directly in low pressure oil sump 6, to keep the circulating path of lubricating oil simpler.

As shown in figure 8, can be equipped with the capillary 91 of plate-like between gas and oil separating plant 4 and low pressure oil sump 6, lubricating oil exists Capillary 91 can be passed through during flowing to low pressure oil sump 6, to reduce the pressure of lubricating oil, in order to be stored in low pressure oil In pond 6.

The other technical characteristics of embodiment 5 are identical as in embodiment 1, and details are not described herein.

Embodiment 6

As shown in figure 8, between gas and oil separating plant 4 and low pressure oil sump 6 can be equipped with pressure reducing valve 92, lubricating oil flow to it is low Pressure reducing valve 92 can be passed through during pressure oil pond 6, to reduce the pressure of lubricating oil, in order to be stored in low pressure oil sump 6.

The other technical characteristics of embodiment 6 are identical as in embodiment 5, and details are not described herein.

In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example Point is contained at least one embodiment or example of the utility model.In the present specification, to the schematic table of above-mentioned term It states and is necessarily directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be with It can be combined in any suitable manner in any one or more of the embodiments or examples.In addition, those skilled in the art can incite somebody to action Different embodiments or examples described in this specification are engaged and are combined.

Although the embodiments of the present invention have been shown and described above, it is to be understood that above-described embodiment is Illustratively, it should not be understood as limiting the present invention, those skilled in the art are in the scope of the utility model Inside it can make changes, modifications, alterations, and variations to the above described embodiments.

Claims (27)

1. a kind of low back pressure compressor, which is characterized in that including：

Shell；

Compression mechanism, the compression mechanism are arranged in the shell, have compression chamber and high pressure gas in the compression mechanism Chamber；

Gas and oil separating plant, the gas and oil separating plant are cyclone type oil air separation, and the gas and oil separating plant is arranged to Gaseous coolant to entering the carrying lubricating oil in the gas and oil separating plant is acted on using cyclonic separation carries out Oil-gas Separation.

2. low back pressure compressor according to claim 1, which is characterized in that the gas and oil separating plant is arranged in the shell Except body.

3. low back pressure compressor according to claim 1, which is characterized in that the gas and oil separating plant includes：

Shell portion has cyclonic separation chamber in the shell portion；

Inlet tube, the inlet tube is arranged in the shell portion and the connection cyclonic separation chamber, the input end of the inlet tube It is connected with the high pressure gas chamber；And

Outlet, the outlet is arranged in the shell portion and the connection cyclonic separation chamber, wherein from the inlet tube into The gaseous coolant of the carrying lubricating oil entered is moved in the cyclonic separation chamber inside spin to carry out Oil-gas Separation, the gaseous state after separation Refrigerant is discharged from the outlet and the lubricating oil after detaching is collected in the shell portion.

4. low back pressure compressor according to claim 3, which is characterized in that the inlet tube and the cyclonic separation chamber It is connected to the connection end that end is higher than the outlet and the cyclonic separation chamber.

5. low back pressure compressor according to claim 4, which is characterized in that the inlet tube is horizontally connected in the shell In portion, the outlet vertically wears the roof in the shell portion.

6. low back pressure compressor according to claim 5, which is characterized in that the inner peripheral surface of the cyclonic separation chamber is cylinder Face, the inlet tube and the cylindrical surface are tangent.

7. low back pressure compressor according to claim 6, which is characterized in that the outlet concentrically with shell portion phase Even.

8. low back pressure compressor according to claim 3, which is characterized in that narrow funnel in the bottom in the shell portion Collection portion, the collection portion are provided with oil collecting pipe for collecting lubricating oil at the collection portion.

9. the low back pressure compressor according to any one of claim 1-8, which is characterized in that by the gas and oil separating plant Obtained lubricating oil is exported to the moving component of the compression mechanism after separation, to lubricate the moving component.

10. low back pressure compressor according to claim 9, which is characterized in that the compression mechanism includes：Base bearing, gas Cylinder, supplementary bearing, bent axle and cover board, have the compression chamber in the cylinder, the cover board be arranged on the supplementary bearing and with The high pressure gas chamber is formed between the supplementary bearing.

11. low back pressure compressor according to claim 10, which is characterized in that the surface of the cover board is formed with high pressure oil Slot, the high pressure sump receive the lubricating oil by the gas and oil separating plant resulting separation, and in the high pressure sump Lubricating oil can be conveyed to the moving component.

12. low back pressure compressor according to claim 11, which is characterized in that further include：Oil return component, the oil return group The oil inlet end of part is extend into the high pressure sump, and the oil outlet end of the oil return component is opened wide towards the moving component.

13. low back pressure compressor according to claim 12, which is characterized in that the oil return component includes：Oil return pipe and The oil return hole being formed in the supplementary bearing, the oil return pipe are inserted partially into the oil return hole, the lower end of the oil return pipe It for oil inlet end and extend into the high pressure sump, the upper end of the oil return hole is oil outlet end and towards the moving component.

14. low back pressure compressor according to claim 13, which is characterized in that the bent axle has countershaft section, the pair Bearing has Curved shaft support portion, and the Curved shaft support portion is corresponding with the countershaft section and is used to support the countershaft section, described time The oil outlet end of oilhole runs through the inner peripheral surface in the Curved shaft support portion, and the inner peripheral surface in the Curved shaft support portion and the countershaft section Peripheral surface between be spaced apart to form the first oil return slit, the first oil return slit is connected to the oil return hole and positioned at institute State the low pressure oil sump below the first oil return slit.

15. low back pressure compressor according to claim 13, which is characterized in that the oil return hole is with the relatively described supplementary bearing Inclined mode is formed in the Curved shaft support portion of the supplementary bearing, the angle of the center line of the oil return hole and the supplementary bearing It it is 20 ° -70 °, the oil return pipe is partially embedded into identical angled manner and is fixed in the oil return hole.

16. low back pressure compressor according to claim 11, which is characterized in that be provided with " L " shape oil in the supplementary bearing Road, the low back pressure compressor further include：Intermediate oil pipe, the intermediate oil pipe are partially inserted into " L " in a horizontal manner In the horizontal segment of shape oil duct, the vertical section of " L " the shape oil duct is connected to the horizontal segment and the high pressure sump of lower section, described Part outside the stretching supplementary bearing of intermediate oil pipe is also pierced by the shell and is connected with the gas and oil separating plant outward.

17. low back pressure compressor according to claim 10, which is characterized in that further include：Oil return component, the oil return group The oil inlet end of part is connected with the gas and oil separating plant, and the oil outlet end of the oil return component is opened wide towards the moving component.

18. low back pressure compressor according to claim 17, which is characterized in that the oil return component includes：Oil return pipe and The oil return hole being formed in the supplementary bearing, the oil return pipe are inserted partially into the oil return hole, the outer end of the oil return pipe For oil inlet end and the connection gas and oil separating plant, the inner end of the oil return hole is oil outlet end and towards the moving component.

19. low back pressure compressor according to claim 18, which is characterized in that the bent axle has countershaft section, the pair Bearing has Curved shaft support portion, and the Curved shaft support portion is corresponding with the countershaft section and is used to support the countershaft section, described time The oil outlet end of oilhole runs through the inner peripheral surface in the Curved shaft support portion, and the inner peripheral surface in the Curved shaft support portion and the countershaft section Peripheral surface between be spaced apart to form the first oil return slit, the first oil return slit is connected to the oil return hole and positioned at institute State the low pressure oil sump below the first oil return slit.

20. low back pressure compressor according to claim 19, which is characterized in that the oil return hole with perpendicular to the bent axle Mode be formed in the supplementary bearing, oil return pipe insertion is fixed in the oil return hole.

21. low back pressure compressor according to claim 10, which is characterized in that further include：Oil return pipe, the oil return pipe One end is connected with the gas and oil separating plant and the other end is connected with the tail portion oil storage tank of the tail portion of the sliding vane groove in the cylinder, Slide plate in the sliding vane groove forms the suction power for aspirating lubricating oil in the gas and oil separating plant by reciprocating motion.

22. low back pressure compressor according to claim 21, which is characterized in that the slide plate is formed in the sliding vane groove There is the second oil return slit, one end of the second oil return slit is connected to the tail portion oil storage tank and the other end extends to the cylinder Inner peripheral surface.

23. low back pressure compressor according to claim 22, which is characterized in that the tail portion oil storage tank is connected to exhaust pressure Power, and the outer end sealing of the sliding vane groove.

24. low back pressure compressor according to claim 1, which is characterized in that the low back pressure compressor further includes：Decompression Device, one end of the decompressor is connected with the gas and oil separating plant and the low pressure oil sump phase in the other end and the shell Even.

25. low back pressure compressor according to claim 24, which is characterized in that the decompressor is external in the shell Outside, the decompressor is capillary or pressure reducing valve.

26. low back pressure compressor according to claim 1, which is characterized in that it is formed with pore in the compression mechanism, The outlet end of the pore is connected with the low pressure oil sump of the shell and input end receives what the gas and oil separating plant detached Lubricating oil.

27. low back pressure compressor according to claim 26, which is characterized in that the compression mechanism includes：Base bearing, gas Cylinder, supplementary bearing, bent axle and cover board, have the compression chamber in the cylinder, the cover board be arranged on the supplementary bearing and with The high pressure gas chamber is formed between the supplementary bearing；A part for each pore is formed on the cover board and another Part is formed on the supplementary bearing, and lateral aperture is also formed on the supplementary bearing, and the lateral aperture is connected to the pore, institute It states and is plugged with oil return pipe in lateral aperture, the oil return pipe is pierced by the shell and is connected with the gas and oil separating plant outward.