CN107975476A

CN107975476A - Low back pressure compressor

Info

Publication number: CN107975476A
Application number: CN201711461022.8A
Authority: CN
Inventors: 高斌
Original assignee: Guangdong Meizhi Compressor Co Ltd
Current assignee: Guangdong Meizhi Compressor Co Ltd
Priority date: 2017-12-28
Filing date: 2017-12-28
Publication date: 2018-05-01

Abstract

The invention discloses a kind of low back pressure compressor, low back pressure compressor includes housing, compression mechanism, exhaust pipe and gas and oil separating plant, compression mechanism is arranged in housing, there is compression chamber and high pressure gas chamber in compression mechanism, exhaust pipe connects high pressure gas chamber, gas and oil separating plant is used to carry out Oil-gas Separation to exhaust, wherein the moving component of compression mechanism is delivered to by the lubricating oil of gas and oil separating plant resulting separation, so that lubricating movement part.Low back pressure compressor according to the present invention, can carry out Oil-gas Separation by the exhaust of high pressure gas intracavitary, and separated lubricating oil is delivered to the moving component of low-pressure side, ensure lubricating oil smooth circulation, ensure the reliability and working performance of low back pressure compressor.

Description

Low back pressure compressor

Technical field

The present invention relates to compressor field, in particular to a kind of low back pressure compressor.

Background technology

In existing low back pressure compressor, high-pressure side is vented the separated more difficult oil sump for flowing back to low-pressure side of lubricating oil, from And cause the lubrication oil circulation of low back pressure compressor more difficult.Thus, more oil accumulation is on the one hand caused to make in high-pressure side Lubricants capacity deficiency in winner's oil sump, 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 discharged into circulation in the lump with compressed gas System, influences system energy efficiency.In addition, substantial amounts of refrigerant can be dissolved on high-tension side lubricating oil, so as to cause the refrigeration of system Performance is greatly reduced.

The content of the invention

It is contemplated that solve at least some of the technical problems in related technologies.For this reason, the present invention carries A kind of low back pressure compressor that can guarantee that lubricating oil smooth circulation at least to a certain extent is gone out.

Low back pressure compressor according to the present invention, including housing, compression mechanism, exhaust pipe and gas and oil separating plant, The compression mechanism is arranged in the housing, has compression chamber and high pressure gas chamber, the exhaust pipe in the compression mechanism The high pressure gas chamber is connected, the gas and oil separating plant is used to carry out Oil-gas Separation to exhaust, wherein by the Oil-gas Separation The lubricating oil of device resulting separation is delivered to the moving component of the compression mechanism, so as to lubricate the moving component.

The exhaust of high pressure gas intracavitary, can be carried out Oil-gas Separation by low back pressure compressor according to the present invention, and Separated lubricating oil is delivered to the moving component of low-pressure side, ensures lubricating oil smooth circulation, ensure low back pressure compressor can By property and working performance.

Low back pressure compressor according to the present invention, the compression mechanism include base bearing, cylinder, supplementary bearing, bent axle And cover board, the cylinder is interior to have the compression chamber, and the cover board is arranged on the supplementary bearing and between the supplementary bearing Form the high pressure gas chamber.

Further, the surface of the direction of the cover board high pressure gas chamber is formed with high pressure sump, the high pressure oil Groove is used for the lubricating oil for collecting the high pressure gas intracavitary, and the lubricating oil in the high pressure sump can be to the moving component Conveying.

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 the oil return hole, the lower end of the oil return pipe for oil inlet end and is extend into the high pressure sump, institute tubing section The upper end of oil return hole is stated as oil outlet end and towards the moving component.

Further, the bent axle has countershaft section, and the supplementary bearing has 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 Side face, and be spaced apart between the inner peripheral surface in the Curved shaft support portion and the outer circumferential surface of the countershaft section narrow to form the first oil return Seam, the first oil return slit connect 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 a manner of relatively described supplementary bearing is inclined In supporting part, 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, the most upper edge of the oil outlet end of the oil return hole is not less than the centre position of the supplementary bearing.

Low back pressure compressor according to the present invention, the high pressure sump are the annular oil groove around the supplementary bearing, The inner edge of the high pressure sump and the outer circumferential surface in the Curved shaft support portion of the supplementary bearing are substantially concordant, outside the high pressure sump All outer circumferential surfaces along close to the Curved shaft support portion.

Low back pressure compressor according to the present invention, the upper surface of the high pressure sump are provided with strainer.

Low back pressure compressor according to the present invention, the surface of the direction high pressure gas chamber of the cover board is with small angle Spend inclined mode to the high pressure sump to extend, so as to be guided to separation to the lubricating oil on the surface by the surface described High pressure sump.

Low back pressure compressor according to the present invention, the high pressure gas chamber are annular, are also set up on the supplementary bearing There is the exhaust outlet for connecting the high pressure gas chamber and the compression chamber, the exhaust outlet is opened and closed by exhaust valve plate, the air bleeding valve Piece and the exhaust pipe are located at the radially opposite sides of the bent axle respectively.

Low back pressure compressor according to the present invention, the gas and oil separating plant are arranged on the high pressure gas intracavitary.

Alternatively, the moving component is bent axle.

Low back pressure compressor according to the present invention, the oil return hole are formed in institute in a manner of perpendicular to the bent axle State in supplementary bearing, the oil return pipe insertion is fixed in the oil return hole.

Further, the outer end of the oil return pipe be pierced by the housing it is outer and with the external oil outside the housing Air separation is connected.

Further, the high pressure gas chamber is other than ring type, and the connection high pressure gas is additionally provided with the supplementary bearing The exhaust outlet of chamber and the compression chamber, the exhaust outlet are opened and closed by exhaust valve plate, and the exhaust valve plate and the exhaust pipe are located at The same side of the bent axle, the oil return component are located at the opposite side of the bent axle.

Further, the gas and oil separating plant is arranged on outside the housing.

Alternatively, the moving component is bent axle.

Low back pressure compressor according to the present invention, the low back pressure compressor further include drainback passage, the oil return Passage connects the sliding vane groove in the high pressure sump and the cylinder, and the slide plate in the sliding vane groove is formed by reciprocating motion Aspirate the suction power of lubricating oil in the high pressure sump.

Further, the afterbody of the sliding vane groove is formed with afterbody oil storage tank, described in the upper end connection of the drainback passage Afterbody oil storage tank and the lower end connection high pressure sump.

Further, the slide plate and the sliding vane groove are interior formed with the second oil return slit, the second oil return slit One end connect the afterbody oil storage tank and the other end extends to the inner peripheral surface of the cylinder.

Further, the afterbody oil storage tank connection pressure at expulsion, and the outer end sealing of the sliding vane groove.

Further, the drainback passage is formed in the supplementary bearing with the direction parallel to the bent axle, described time What fluid flow section was minimum in oily passage, the afterbody oil storage tank and the high pressure sump three is drainback passage.

Alternatively, the moving component is slide plate.

Alternatively, the upper end of the drainback passage connects the medium position of the sliding vane groove and lower end connects the high pressure oil Groove.

The additional aspect and advantage of the present invention will be set forth in part in the description, and will partly become from the following description Obtain substantially, or recognized by the practice of the present invention.

Brief description of the drawings

The above-mentioned and/or additional aspect and advantage of the present invention will become in the description from combination accompanying drawings below to embodiment Substantially and it is readily appreciated that, wherein：

Fig. 1 is the structure diagram of the low back pressure compressor of the embodiment of the present invention 1；

Fig. 2 is the enlarged drawing at A in Fig. 1；

Fig. 3 is the structure diagram of the low back pressure compressor of the embodiment of the present invention 2；

Fig. 4 is the structure diagram of the low back pressure compressor of the embodiment of the present invention 3；

Fig. 5 is the structure diagram of the low back pressure compressor of the embodiment of the present invention 4.

Reference numeral：

Low back pressure compressor 100, the first oil return slit 101, the second oil return slit 102, housing 1, compression mechanism 2, compression Chamber 201, high pressure gas chamber 202, high pressure sump 203, strainer 204, exhaust outlet 205, exhaust valve plate 206, drainback passage 207 are sliding Film trap 208, afterbody oil storage tank 209, base bearing 21, cylinder 22, supplementary bearing 23, Curved shaft support portion 231, bent axle 24, countershaft section 241, cover board 25, slide plate 26, support spring 27, exhaust pipe 3, gs-oil separator 4, oil return component 5, oil return pipe 51, oil return hole 52, Low pressure oil sump 6.

Embodiment

The embodiment of the present invention is described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end Same or similar label represents same or similar element or has the function of same or like element.Below with reference to attached The embodiment of figure description is exemplary, it is intended to for explaining the present invention, and is not considered as limiting the invention.

In the description of the present invention, it is to be understood that term " on ", " under ", " vertical ", " level ", " top ", " bottom ", The orientation or position relationship of the instructions such as " interior ", " outer " are based on orientation shown in the drawings or position relationship, are for only for ease of and retouch State the present invention and simplify description, rather than indicate or imply that signified device or element there must be specific orientation, with specific Azimuth configuration and operation, therefore be not considered as limiting the invention.

In addition, term " first ", " second " are only used for description purpose, and it is not intended that instruction or hint relative importance Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can be expressed or Implicitly include one or more this feature.In the description of the present invention, " multiple " are meant that at least two, such as two It is a, three etc., unless otherwise specifically defined.

In the present invention, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " fixation " etc. Term should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integrally；Can be that machinery connects Connect or be electrically connected or can communicate with one another；It can be directly connected, can also be indirectly connected by intermediary, can To be the interaction relationship of connection inside two elements or two elements.For the ordinary skill in the art, The concrete meaning of above-mentioned term in the present invention can be understood as the case may be.

5 embodiments of the present invention are specifically described with reference to Fig. 1-Fig. 5.

Embodiment 1：

As depicted in figs. 1 and 2, the low back pressure compressor 100 of the embodiment of the present invention can include housing 1, compression mechanism 2, Exhaust pipe 3 and gas and oil separating plant.Compression mechanism 2 can be arranged in housing 1, can have compression chamber 201 in compression mechanism 2 With high pressure gas chamber 202, compression chamber 201 and high pressure gas chamber 202 are separated from each other, and compression chamber 201 and high pressure gas chamber 202 pass through Exhaust outlet 205 connects, and exhaust valve plate 206 is opened and closed exhaust outlet 205.

Exhaust pipe 3 can connect the outdoor heat exchanger outside housing 1 with high pressure gas chamber 202, and low-pressure gas is from air entry Compression chamber 201 is inhaled into, can be via high pressure gas chamber 202 simultaneously after being compressed to gases at high pressure by piston in compression chamber 201 The outdoor heat exchanger outside housing 1 is drained into eventually through exhaust pipe 3.

Gas and oil separating plant (such as the gs-oil separator 4 being arranged in Fig. 1 at exhaust outlet 205) can to gases at high pressure into Row Oil-gas Separation, and the lubricating oil drop that script dissociates in gases at high pressure is collected and is delivered to the movement portion of compression mechanism 2 Part, so that lubricating movement part.

Low back pressure compressor 100 according to embodiments of the present invention, by setting gas and oil separating plant, can recycle high pressure gas The lubricating oil drop to dissociate in body, so that lubricating oil is in low 100 internal circulation flow of back pressure compressor.Thus, on the one hand avoid After gases at high pressure enter refrigeration plant, lubricating oil dissolving refrigerant that gases at high pressure carry ensure that the refrigeration of refrigeration plant Performance.On the other hand, it can lubricate, ensure low for the moving component of compression mechanism 2 after lubricating oil is collected by gas and oil separating plant 100 reliable operation of back pressure compressor.

Specifically, as shown in Figure 1, compression mechanism 2 can 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.

Specifically, as shown in Figure 1, the surface towards high pressure gas chamber 202 of cover board 25 could be formed with high pressure sump 203, high pressure sump 203 is used to collecting lubricating oil in high pressure gas chamber 202, and the lubricating oil in high pressure sump 203 can be to Moving component conveys.Thus, the gases at high pressure that high pressure sump 203 can temporarily be gathered and store out of high pressure gas chamber 202 are received The lubricating oil of collection, moving component is delivered to consequently facilitating concentrating by lubricating oil, to ensure the lubrication to moving component.Alternatively, Moving component can be bent axle 24.

More specifically, as depicted in figs. 1 and 2, 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.Thus, 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 can produce negative pressure during exercise so that 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 depicted in figs. 1 and 2, oil return component 5 can 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, thus, high pressure oil Lubricating oil in groove 203 can be flowed in oil return hole 52 by oil return pipe 51, and is finally delivered to moving component.

More specifically, as shown in Figure 1, bent axle 24 can have countershaft section 241, supplementary bearing 23 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 The outside of countershaft section 241 is circumferentially positioned at, 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 outer circumferential surface of countershaft section 241 to form the first oil return slit of annular 101, the first oil return slit 101 can connect oil return hole 52 and the low pressure oil sump 6 positioned at the lower section of the first oil return slit 101.

In other words, the lubricating oil in high pressure sump 203 can flow to the first oil return slit 101 via oil return hole 52, and right Rotating bent axle 24 is lubricated at first oil return slit 101, and subsequent lubricating oil can flow to the first oil return under self gravitation The low pressure oil sump 6 of the lower section of slit 101, to carry out the circulation of lubricating oil next time.

More specifically, as depicted in figs. 1 and 2, 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 with 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 thus, oil return component 5 can be using unitary construction as beeline channel, so that high pressure sump 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 due to influence of the perforate to 23 intensity of supplementary bearing.

More specifically, as shown in Figure 1, the oil outlet end of oil return hole 52 most on along the centre that can be not less than supplementary bearing 23 Position.Thus, after the lubricating oil in high pressure sump 203 flows into the first oil return slit 101 by oil return hole 52, lubricating oil can be right Supplementary bearing 23 carries out more large area lubrication, ensures that supplementary bearing 23 works normally.

Specifically, as shown in Figure 1, high pressure sump 203 can be the annular oil groove around supplementary bearing 23, high pressure sump 203 Inner edge can be concordant with the outer circumferential surface in the Curved shaft support portion 231 of supplementary bearing 23 or differ within 3mm, high pressure sump 203 Periphery along can close to Curved shaft support portion 231 outer circumferential surface.Thus, high pressure sump 203 has the cross-sectional area of bigger, can store up More lubricating oil are deposited, while high pressure sump 203 so can effectively shorten oil return component 5 closer to Curved shaft support portion 231 Size, especially for the length of oil return pipe 51, what can be set is relatively small, in the case of oil return smoothly is met, subtracts Small oil return pipe 51 stretches into the volume of high pressure gas chamber, and then reduces the disturbance effect to high pressure gas intracavity gas so that exhaust It is more unobstructed.

Specifically, as shown in Figure 1, the upper surface of high pressure sump 203 can be covered with strainer 204.Strainer 204 can prevent Solid particle in high pressure gas chamber 202 enters in high pressure sump 203, ensures the lubricating oil in high pressure sump 203 to movement portion The lubricant effect of part.

In some specific examples, the surface towards high pressure gas chamber 202 of cover board 25 can be tilted down with low-angle Mode extend to high pressure sump 203, so as to which separation is guided in high pressure sump 203 to the lubricating oil on the surface, In other words, lubricating oil can flow to high pressure sump 203 under self gravitation effect, ensure the smooth circulation of lubricating oil.

Specifically, as shown in Figure 1, high pressure gas chamber 202 can be annular, it is high that connection is also provided with supplementary bearing 23 The exhaust outlet 205 of pressure air cavity 202 and compression chamber 201, exhaust outlet 205 can be opened and closed by exhaust valve plate 206, exhaust valve plate 206 The radially opposite sides of bent axle 24 can be located at respectively with exhaust pipe 3.Thus, gases at high pressure range ability in high pressure gas chamber 202 It is longer and 3 place side of exhaust pipe can be moved to from 206 place side ring shape of exhaust valve plate around high pressure gas chamber 202, so that high pressure Gas is paramount by the lubricating oil droplet flow dissociated in gases at high pressure with enough distances during movement in high pressure gas chamber 202 The inner wall of pressure air cavity 202 is simultaneously collected to high pressure sump 203.

Specifically, as shown in Figure 1, gas and oil separating plant can be arranged in high pressure gas chamber 202.Thus low back pressure compression 100 overall structure of machine is more compact, and lubricating oil can be completed to separate and circulate directly in high pressure gas chamber 202 with gases at high pressure Low pressure oil sump 6 is flowed to, the flow path of lubricating oil is shorter, further lubricating oil smoothly following in low back pressure compressor 100 Ring.

Embodiment 2

As shown in figure 3, the gas and oil separating plant of low back pressure compressor 100 can be arranged on outside housing 1, high pressure gas chamber 202 can be other than ring type, and exhaust valve plate 206 and exhaust pipe 3 can be located at the same side of bent axle 24, and oil return component 5 can position In the opposite side of bent axle 24, thus oil return component 5 and exhaust pipe 3 can avoid mutually, be more convenient for setting.

As shown in figure 3, gases at high pressure can flow to oil gas point by high pressure gas chamber 202 of the exhaust pipe 3 out of housing 1 From device and separation lubrication oil, oil return pipe 51 can be embedded in the outside for being fixed in oil return hole 52 and being located at oil return hole 52, High pressure sump 203 can be not provided with housing 1, the lubricating oil after separation can flow to returning in housing 1 by oil return pipe 51 In oilhole 52, and low pressure oil sump 6 is further directly entered by the first oil return slit 101.

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, thus, the lubricating oil in oil return hole 52 can more successfully flow into the first oil return slit 101.

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

Embodiment 3

As shown in figure 4, low back pressure compressor 100 can also include drainback passage 207, drainback passage 207 can be vertically Direction penetrates through supplementary bearing 23, and drainback passage 207 can connect the sliding vane groove 208 in high pressure sump 203 and cylinder 22.Support bullet Spring 27 can promote slide plate 26 to be moved back and forth in sliding vane groove 208, when the slide plate 26 in sliding vane groove 208 moves back and forth, slide plate Pressure reduces in groove 208, so that the pressure of sliding vane groove 208 is less than the pressure of high pressure sump 203, the lubrication in high pressure sump 203 Oil flows to sliding vane groove 208 under differential pressure action by drainback passage 207.

Specifically, as shown in figure 4, the afterbody of sliding vane groove 208 could be formed with afterbody oil storage tank 209, drainback passage 207 Upper end can connect afterbody oil storage tank 209, and the lower end of drainback passage 207 can connect high pressure sump 203.Slide plate 26 is in sliding vane groove When being moved in 208, the pressure of 208 afterbody of sliding vane groove is smaller, i.e. pressure differential between 208 afterbody of sliding vane groove and high pressure sump 203 Maximum, lubricating oil flow to afterbody oil storage tank 209 from drainback passage 207, and the flowing of lubricating oil can be made more smooth.

Specifically, as shown in figure 4, 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 connect afterbody oil storage tank 209 and the other end can extend to the inner peripheral surface of cylinder 22.Thus, it is sliding Lubricating oil in afterbody oil storage tank 209 can be taken to the second oil return slit 102 by piece 26 in sliding vane groove 208 during movement, so that Lubricating oil at the same time can be lubricated slide plate 26 and bent axle 24, further improve the functional reliability of low back pressure compressor 100.

More specifically, as shown in figure 4, afterbody oil storage tank 209 can be connected with high pressure gas chamber 202 to connect exhaust pressure Power, and the outer end of sliding vane groove 208 can be sealed to isolate with the low-voltage space where the low pressure oil sump 6 in housing 1.Thus, it is sliding There are elevated pressures, i.e. pressure difference in compression chamber 201 and sliding vane groove 208 where the first oil return slit 101 at this time in film trap 208 It is smaller, lubricating oil is driven to the first oil return slit 101 from afterbody oil storage tank 209 easy to slide plate 26.

More specifically, as shown in figure 4, drainback passage 207 can be formed in supplementary bearing with the direction parallel to bent axle 24 In 23, what fluid flow section was minimum in 203 three of drainback passage 207, afterbody oil storage tank 209 and high pressure sump can be oil return Passage 207.Thus, drainback passage 207 more successfully can flow to afterbody oil storage tank 209 from high pressure sump 203, and increase The effect that oils.

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

Embodiment 4

In some specific embodiments, as shown in figure 5, the upper end of drainback passage 207 can be connected in sliding vane groove 208 Portion position, at this time, therefore, due to the movement of slide plate 26 between the upper end position of drainback passage 207 and high pressure sump 203 Pressure difference can be formed, so that the lubricating oil in high pressure sump 203 is drained in sliding vane groove 208, forms circulating for lubricating oil.

The other technical characteristics of embodiment 4 are identical with embodiment 3, and details are not described herein.

Embodiment 5

In some specific embodiments, high pressure sump 203 can be not provided with housing 1, inner side can be with oil return hole 52 It is connected with sliding vane groove 208.The lubricating oil isolated from gases at high pressure can flow to the oil return hole in housing 1 by oil return pipe 51 In 52, and flowed into from oil return hole 52 in sliding vane groove 208, so that lubricating oil can be followed by the second oil return slit 102 and first Enter low pressure oil pond 6 after oil return slit 101, thus lubricating oil at the same time can be lubricated slide plate 26 and bent axle 24.

The other technical characteristics of embodiment 5 are identical with embodiment 2, and details are not described herein.

In the above-described embodiments, it is to illustrate using single cylinder structure as typical case, if in fact, compressor is double-cylinder structure When, it is only necessary to accordingly increase similar structure on another cylinder 22 and middle demarcation strip, its principle with it is above-mentioned Embodiment is identical, repeats no more.

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 the spy for combining the embodiment or example description Point is contained at least one embodiment of the present invention or example.In the present specification, schematic expression of the above terms is not It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office What combined in an appropriate manner in one or more embodiments or example.In addition, those skilled in the art can say this Different embodiments or example described in bright book are engaged and combined.

Although the embodiment of the present invention has been shown and described above, it is to be understood that above-described embodiment is example Property, it is impossible to limitation of the present invention is interpreted as, those of ordinary skill in the art within the scope of the invention can be to above-mentioned Embodiment is changed, changes, replacing and modification.

Claims

A kind of 1. low back pressure compressor, it is characterised in that including：

Housing；

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

Exhaust pipe, the exhaust pipe connect the high pressure gas chamber；

Gas and oil separating plant, the gas and oil separating plant are used to carry out Oil-gas Separation to exhaust；

The moving component of the compression mechanism is wherein delivered to by the lubricating oil of the gas and oil separating plant resulting separation, so that Lubricate the moving component.
2. low back pressure compressor according to claim 1, it is characterised 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.
3. low back pressure compressor according to claim 2, it is characterised in that the direction high pressure gas chamber of the cover board Surface formed with high pressure sump, the high pressure sump is used for the lubricating oil for collecting the high pressure gas intracavitary, and the height Lubricating oil in pressure oil groove can be conveyed to the moving component.
4. low back pressure compressor according to claim 3, it is characterised in that further include：Oil return component, the oil return component Oil inlet end extend into the high pressure sump, the oil outlet end of the oil return component is opened wide towards the moving component.
5. low back pressure compressor according to claim 4, it is characterised in that the oil return component includes：Oil return pipe and shape Into the oil return hole in the supplementary bearing, the oil return pipe is inserted partially into the oil return hole, and the lower end of the oil return pipe is Oil inlet end and it extend into the high pressure sump, the upper end of the oil return hole is for oil outlet end and towards the moving component.
6. low back pressure compressor according to claim 5, it is characterised in that the bent axle has countershaft section, the countershaft Hold corresponding with the countershaft section and for supporting the countershaft section, the oil return with Curved shaft support portion, the Curved shaft support portion The oil outlet end in hole 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 It is spaced apart between outer circumferential surface to form the first oil return slit, the first oil return slit connects the oil return hole and positioned at described Low pressure oil sump below first oil return slit.
7. low back pressure compressor according to claim 5, it is characterised in that the oil return hole is inclined with relatively described supplementary bearing Oblique mode is formed in the Curved shaft support portion of the supplementary bearing, and the center line of the oil return hole and the angle of the supplementary bearing are 20 ° -70 °, the oil return pipe is partially embedded into identical angled manner and is fixed in the oil return hole.
8. low back pressure compressor according to claim 7, it is characterised in that the most upper edge of the oil outlet end of the oil return hole is not Less than the centre position of the supplementary bearing.
9. low back pressure compressor according to claim 3, it is characterised in that the high pressure sump is around the supplementary bearing Annular oil groove, the inner edge of the high pressure sump and the outer circumferential surface in the Curved shaft support portion of the supplementary bearing are substantially concordant, described Outer circumferential surface of the periphery of high pressure sump along the close Curved shaft support portion.
10. low back pressure compressor according to claim 3, it is characterised in that the upper surface of the high pressure sump is provided with Strainer.
11. low back pressure compressor according to claim 3, it is characterised in that the direction high pressure gas of the cover board The surface of chamber is extended in a manner of small angle inclination to the high pressure sump, so that by the surface to separation to the profit on the surface Lubricating oil is guided to the high pressure sump.
12. low back pressure compressor according to claim 3, it is characterised in that the high pressure gas chamber is annular, the pair The exhaust outlet for connecting the high pressure gas chamber and the compression chamber is additionally provided with bearing, the exhaust outlet is opened by exhaust valve plate Close, the exhaust valve plate and the exhaust pipe are respectively positioned at the radially opposite sides of the bent axle.
13. low back pressure compressor according to claim 3, it is characterised in that the gas and oil separating plant is arranged on described High pressure gas intracavitary.
14. the low back pressure compressor according to any one of claim 3-13, it is characterised in that the moving component is song Axis.
15. low back pressure compressor according to claim 6, it is characterised in that the oil return hole is with perpendicular to the bent axle Mode be formed in the supplementary bearing, oil return pipe insertion is fixed in the oil return hole.
16. low back pressure compressor according to claim 15, it is characterised in that the outer end of the oil return pipe is pierced by the shell It is connected in vitro and with the external gas and oil separating plant outside the housing.
17. low back pressure compressor according to claim 3, it is characterised in that the high pressure gas chamber is other than ring type, described The exhaust outlet for connecting the high pressure gas chamber and the compression chamber is additionally provided with supplementary bearing, the exhaust outlet is opened by exhaust valve plate Close, the exhaust valve plate and the exhaust pipe are located at the same side of the bent axle, and the oil return component is located at the another of the bent axle Side.
18. low back pressure compressor according to claim 2, it is characterised in that the gas and oil separating plant is arranged on described Outside housing.
19. the low back pressure compressor according to any one of claim 15-18, it is characterised in that the moving component is Bent axle.
20. low back pressure compressor according to claim 3, it is characterised in that further include：Drainback passage, the oil return are led to Road connects the sliding vane groove in the high pressure sump and the cylinder, and the slide plate in the sliding vane groove is taken out by reciprocating motion to be formed Inhale the suction power of lubricating oil in the high pressure sump.
21. low back pressure compressor according to claim 20, it is characterised in that the afterbody of the sliding vane groove is formed with afterbody Oil storage tank, the upper end of the drainback passage connects the afterbody oil storage tank and lower end connects the high pressure sump.
22. low back pressure compressor according to claim 21, it is characterised in that the slide plate in the sliding vane groove with forming There is the second oil return slit, one end of the second oil return slit connects the afterbody oil storage tank and the other end extends to the cylinder Inner peripheral surface.
23. low back pressure compressor according to claim 20, it is characterised in that the afterbody oil storage tank connects exhaust pressure Power, and the outer end sealing of the sliding vane groove.
24. low back pressure compressor according to claim 20, it is characterised in that the drainback passage is with parallel to the song The direction of axis is formed in the supplementary bearing, oily in the drainback passage, the afterbody oil storage tank and the high pressure sump three Liquid flow section minimum is drainback passage.
25. the low back pressure compressor according to any one of claim 20-24, it is characterised in that the moving component is Slide plate.
26. low back pressure compressor according to claim 20, it is characterised in that described in the upper end connection of the drainback passage The medium position of sliding vane groove and the lower end connection high pressure sump.