CN106286298B

CN106286298B - Low back pressure horizontal compressor and refrigeration system

Info

Publication number: CN106286298B
Application number: CN201610940412.2A
Authority: CN
Inventors: 郝唯; 杨开成
Original assignee: Guangdong Meizhi Compressor Co Ltd
Current assignee: Guangdong Meizhi Compressor Co Ltd
Priority date: 2016-10-31
Filing date: 2016-10-31
Publication date: 2018-06-15
Anticipated expiration: 2036-10-31
Also published as: CN106286298A

Abstract

The present invention discloses a kind of low back pressure horizontal compressor and refrigeration system.Compressor includes：Housing, housing are equipped with air intake duct and exhaust pipe, and the bottom of housing is equipped with low pressure oil sump；Compression mechanism, compression mechanism includes two cylinders, two fitted bearings, two cover boards, bent axle and rolling bearing, the side toward each other of two cylinders is respectively equipped with a cover board, two fitted bearings are connected by retainer with the discharge chamber for limiting a closing, bent axle and two fitted bearings coordinate, rolling bearing is equipped between at least one fitted bearing and bent axle and the part for not setting rolling bearing of fitted bearing is slidably matched with bent axle, centre bore is equipped in bent axle, bent axle is equipped with multiple radial holes, each radial hole is connected with centre bore, centre bore is connected by fuel feed pump with low pressure oil sump, each fitted bearing is correspondingly arranged at least one radial hole.The compressor of the present invention is conducive to improve fuel delivery, reduces the abrasion of fitted bearing.

Description

Low back pressure horizontal compressor and refrigeration system

Technical field

The present invention relates to refrigeration technology field, more particularly, to a kind of low back pressure horizontal compressor and refrigeration system.

Background technology

For low back pressure compressor for example using the low back pressure compressor of carbon-hydrogen refrigerant, enclosure interior is pressure of inspiration(Pi), this So that low back pressure compressor has, refrigerant is low with the solubility of refrigerator oil, and coolant injection amount is few, and the temperature of housing is more low excellent Point, low back pressure compressor it is applied widely.However, reduce just because of low back pressure compressor coolant injection amount, lubricating oil Enclosed volume can also reduce, and traditional lubricating system can cause occur the problem of fuel delivery is insufficient between bearing and bent axle, and then lead Cause the abrasion of bearing.

Invention content

The present invention is directed to solve at least some of the technical problems in related technologies.For this purpose, the present invention carries Go out a kind of low back pressure horizontal compressor, be conducive to increase the fuel delivery between bent axle and fitted bearing, reduce abrasion.

The present invention also proposes a kind of refrigeration system, including above-mentioned low back pressure horizontal compressor.

Low back pressure horizontal compressor according to embodiments of the present invention, including：Housing, the housing are equipped with air intake duct and row It is connected in tracheae, the air intake duct and the housing, the bottom of the housing is equipped with low pressure oil sump；Motor, the motor are located at In the housing；Compression mechanism, the compression mechanism are located in the housing, the compression mechanism include two cylinders, two Fitted bearing, two cover boards, bent axle and rolling bearing, the side away from each other of described two cylinders are respectively equipped with described in one Fitted bearing, the side toward each other of described two cylinders are respectively equipped with a cover board, on each fitted bearing Equipped with the air entry connected with the air intake duct, described two fitted bearings be connected by retainer with limit one closing Discharge chamber, the exhaust outlet of each cylinder are connected with the discharge chamber, and the exhaust pipe is extend into the discharge chamber, described Bent axle and the rotor engagement of two fitted bearing cooperations and the bent axle and the motor, at least one fitted bearing and institute The part for not setting the rolling bearing equipped with the rolling bearing and the fitted bearing is slided with the bent axle between stating bent axle Dynamic cooperation, the bent axle is interior to be equipped with centre bore, and the bent axle is equipped with multiple radial holes, each radial hole and the center Hole connects, and the centre bore connected by fuel feed pump with the low pressure oil sump, each the fitted bearing with it is at least one described Radial hole is correspondingly arranged.

On the one hand low back pressure horizontal compressor according to embodiments of the present invention passes through at least one fitted bearing and song It is rolled using rolling bearing between axis and is slidably matched with merging using the part for not setting rolling bearing of the fitted bearing with bent axle, So as to be conducive to improve the leakproofness between fitted bearing and bent axle, on the other hand centre bore is set in bent axle, and in bent axle The upper multiple radial holes of setting, make each radial hole be connected with centre bore, and centre bore is made to pass through fuel feed pump and is connected with low pressure oil sump, And each fitted bearing is made to be correspondingly arranged at least one radial hole, consequently facilitating the lubricating oil in low pressure oil sump passes through fuel feed pump It enters in the centre bore of bent axle, the lubricating oil in centre bore can pass through radial hole flow direction between fitted bearing and bent axle Rolling bearing so as to be conducive to improve fuel delivery, and then is conducive to improve lubricant effect, reduces fitted bearing, bent axle and rolling The abrasion of dynamic bearing.

According to some embodiments of the present invention, it is contained with lubricating oil in the discharge chamber.

According to some embodiments of the present invention, the air intake duct is located at one far from the compression mechanism of the motor Side.

According to some embodiments of the present invention, at least one rolling bearing is equipped with connects with the corresponding air entry Logical oil leak hole, the one end open of the oil leak hole are located on the internal perisporium of corresponding fitted bearing.

Specifically, the value range of the diameter of the oil leak hole is Ф 1mm- Ф 3mm.

According to some embodiments of the present invention, the side far from the compression mechanism of the rotor is equipped with fan, described Fan is rotated synchronously with the rotor, and the lubricating oil that the fan is rotated such that in the low pressure oil sump passes through the fuel feed pump It enters in the centre bore.

Optionally, the first refrigerant passage, the compression mechanism are limited between the internal perisporium of the motor and the housing The second refrigerant passage is equipped between the inner roof wall of the housing.

Specifically, the circulation area of first refrigerant passage is S_{On electricity}, the circulation area of second refrigerant passage is S_{In pressure}, wherein S_{In pressure}>1.5S_{On electricity}。

According to some embodiments of the present invention, first is equipped between the inner bottom wall of the periphery wall of the motor and the housing The second oil flow passage is equipped between the inner bottom wall of oil flow passage, the compression mechanism and the housing.

Specifically, the circulation area of first oil flow passage is S_{Under electricity}, the circulation area of second oil flow passage For S_Pressure, wherein S_Pressure>1.5S_{Under electricity}。

According to some embodiments of the present invention, the length of the part of the rolling bearing is set in the same fitted bearing It is L2 to spend the length of part being slidably matched for L1, with the bent axle, and bearing module M=L1/L2, the bearing module M's takes It is worth ranging from 1-4.

Specifically, the length of the part being slidably matched with the bent axle of the fitted bearing be L2, the fitted bearing The part being slidably matched with the bent axle and the bent axle between radial clearance for Δ A, lubrication rates P=Δ A/L2, wherein The value range of lubrication rates is 0.3~1.2.

Refrigeration system according to embodiments of the present invention, including above-mentioned low back pressure horizontal compressor.

Refrigeration system according to embodiments of the present invention, it is simple in structure by setting above-mentioned low back pressure horizontal compressor.

Description of the drawings

Fig. 1 is the structure diagram of low back pressure horizontal compressor according to some embodiments of the invention；

Fig. 2 is the partial schematic diagram of low back pressure horizontal compressor according to figure 1；

Fig. 3 is the fuel feed pump of low back pressure horizontal compressor according to some embodiments of the invention and the connection signal of oily cap Figure.

Reference numeral：

Compressor 100；

Housing 1；Air intake duct 11；Exhaust pipe 12；Low pressure oil sump a；

Motor 2；Rotor 21；Stator 22；

Cylinder 31a, 31b；Fitted bearing 32a, 32b；Air entry 322a, 322b；Oil leak hole 321；Cover board 33a, 33b；It is bent Axis 34；Centre bore 341；Radial hole 342；Rolling bearing 35a, 35b；

Retainer 4；Discharge chamber 41；First refrigerant passage 5；Second refrigerant passage 6；First oil flow passage 7；Second oil stream Dynamic channel 8；Fan 9；Fuel feed pump 10；Oily cap 101.

Specific embodiment

The embodiment of the present invention is described below in detail, the example of the embodiment is shown in the drawings.Below with reference to The embodiment of attached drawing 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 " " center ", " longitudinal direction ", " length ", " width ", " thickness ", " on ", " under ", "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outer ", " axial direction ", " radial direction ", Wait the orientation of instructions or position relationship be based on orientation shown in the drawings or position relationship, be for only for ease of the description present invention and Simplify description rather than instruction 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.Define " first " as a result, the feature of " second " can be expressed or Implicitly include at least one this feature.In the description of the present invention, " multiple " are meant that at least two, such as two, three It is a etc., unless otherwise specifically defined.

Below with reference to Fig. 1-Fig. 3 descriptions low back pressure horizontal compressor 100 according to embodiments of the present invention, the compressor 100 It can be applied in the refrigeration system of single cooling system or heat pump system etc..

With reference to shown in Fig. 1, low back pressure horizontal compressor 100 according to embodiments of the present invention can include housing 1, compressor Structure and motor 2 etc..Specifically, when motor 2 and compression mechanism are located in housing 1, three connections can will be divided into housing 1 Chamber.For example, the P1 chambers between motor 2 and the right side wall of housing 1 as shown in Figure 1, positioned at motor 2 and compression mechanism Between P2 chambers and the P3 chambers between the left side wall of compression mechanism and housing 1.Herein it should be noted that " left side " " right side " is schematically illustrating with reference to the accompanying drawings, cannot function as a kind of limitation to the present invention herein.

With reference to shown in Fig. 1, split structure may be used in housing 1, such as in some embodiments, and housing 1 substantially can be with It is divided into three parts, i.e. main housing portion and two end housing parts, main housing portion can be structured as circular ring shape, axial direction two End is opened wide, and two end housings can be separately fixed at the both ends of main housing portion, and close main casing, so as to main housing portion And two end housing parts form the shell structure of a closing, welding may be used with end housing parts in main housing portion Mode fix, but not limited to this.

As shown in Figure 1, compression mechanism and motor 2 are set on inside housing 1, the bottom of housing 1 is equipped with low pressure oil sump a, compression Mechanism is the core component of low back pressure horizontal compressor 100, is used to compress the refrigerant in compressor 100, compress When machine 100 works, the lubricating oil in low pressure oil sump a can play the role of lubricating compression mechanism, so as to reduce abrasion.

Specifically, housing 1 is equipped with air intake duct 11 and exhaust pipe 12, is connected in air intake duct 11 and housing 1.When low back pressure crouches When formula compressor 100 is used in refrigeration systems, the refrigerant after exchanging heat in refrigeration system can be entered from air intake duct 11 in housing 1, After the compressed mechanism compression of refrigerant, discharged from exhaust pipe 12.

As shown in Figure 1, compression mechanism includes two cylinder 31a, 31b, two fitted bearing 32a, 32b, two cover boards 33a, 33b, bent axle 34 and rolling bearing 35a, 35b.For low back pressure horizontal compressor 100, the central shaft of bent axle 34 Line is set with horizontal direction general parallel orientation.

Specifically, the side away from each other of two cylinders 31a, 31b are respectively equipped with fitted bearing 32a, a 32b, and two The side toward each other of a cylinder 31a, 31b are respectively equipped with cover board 33a, a 33b, are set on each fitted bearing 32a, 32b There is air entry 322a, the 322b connected with air intake duct 11.For example, as shown in Figure 1, two cylinders 31a, 31b in the lateral direction It is arranged at intervals, sets on the left of the cylinder 31b on the left side and set that there are one cover board 33b, the fitted shafts there are one fitted bearing 32b and right side It holds 32b and is equipped with the air entry 322b connected with air intake duct 11, the refrigerant entered in housing 1 from air intake duct 11 can pass through the suction Gas port 322b is entered in the cylinder 31b on the left side；It is set on the left of the cylinder 31a on the right there are one cover board 33a and right side is equipped with one A fitted bearing 32a, fitted bearing 32a are equipped with the air entry 322a connected with air intake duct 11, are entered from air intake duct 11 Refrigerant in housing 1 can be entered by air entry 322a in the cylinder 31a on the right.

Bent axle 34 and two fitted bearings 32a, 32b coordinate.For example, as shown in Figure 1, the left end of bent axle 34 is sequentially passed through and is matched Sympodium holds 32a, cylinder 31a, cover board 33a, cover board 33b, cylinder 31b and fitted bearing 32b.Motor 2 includes rotor 21 and stator 22, bent axle 34 and the rotor 21 of motor 2 coordinate, and when motor 2 rotates, the rotor 21 of motor 2 can drive bent axle 34 to rotate, bent axle It can be realized during 34 rotation and the refrigerant in two cylinders 31a, 31b is compressed.Herein it should be noted that compressor 100 Therefore operation principle is by as it is known to those skilled in the art that repeat no more.

As shown in Figure 1, two fitted bearings 32a, 32b are connected by retainer 4 with the discharge chamber for limiting a closing 41, the exhaust outlet of each cylinder 31a, 31b are connected with discharge chamber 41, and exhaust pipe 12 is extend into discharge chamber 41, such as such as Fig. 1 institutes Show, exhaust pipe 12 passes through housing 1 and retainer 4 to extend into discharge chamber 41.Two cylinders 31a, 31b are compressed cold as a result, Matchmaker can be drained into from the exhaust outlet of two cylinders 31a, 31b in discharge chamber 41 respectively, and subsequent refrigerant is discharged from exhaust pipe 12 to be compressed Machine 100, so as to which discharge chamber 41 is high pressure chest.

Specifically, each exhaust outlet is arranged on cover board 33a, 33b corresponding with each cylinder 31a, 31b.

It should be noted that compression mechanism further includes the structures such as piston, slide plate, sliding vane groove, the other structures of compression mechanism By as it is known to those skilled in the art that be no longer described in detail herein.

Specifically, above-mentioned rolling bearing 35a, 35b are equipped between at least one fitted bearing 32a, 32b and bent axle 34 and is somebody's turn to do The part for not setting rolling bearing 35a, 35b of fitted bearing 32a, 32b and bent axle 34 are slidably matched.As a result, by least It rolls to match to merge using rolling bearing 35a, 35b between one fitted bearing 32a, 32b and bent axle 34 and utilizes the fitted bearing The part for not setting rolling bearing 35a, 35b of 32a, 32b and bent axle 34 are slidably matched, so as to be conducive to improve fitted bearing 32a, Leakproofness between 32b and bent axle 34.Specifically, as shown in Figure 1, fitted bearing 32a, 32b's does not set rolling bearing 35a, 35b Part adjacent to cover board 33a, 33b set.Preferably, as shown in Figure 1, rolling bearing 35a, 35b are located at fitted bearing 32a, 32b Axle journal and bent axle 34 between.

Centre bore 341 is equipped in bent axle 34, centre bore 341 is upwardly extended in the axis of bent axle 34, and bent axle 34 is equipped with multiple Radial hole 342, each radial hole 342 are connected with centre bore 341, and centre bore 341 is connected by fuel feed pump 10 with low pressure oil sump a, Each fitted bearing 32a, 32b are correspondingly arranged at least one radial hole 342, consequently facilitating the lubricating oil in low pressure oil sump a leads to It crosses fuel feed pump 10 to enter in the centre bore 341 of bent axle 34, the lubricating oil in centre bore 341 can flow to position by radial hole 342 Rolling bearing 35a, 35b between fitted bearing 32a, 32b and bent axle 34, so as to be lubricated to rolling bearing 35a, 35b. In this way, be conducive to improve the lubricant effect to rolling bearing 35a, 35b.

Low back pressure horizontal compressor 100 according to embodiments of the present invention, on the one hand passes through at least one fitted bearing It rolls to match to merge using rolling bearing 35a, 35b between 32a, 32b and bent axle 34 and does not set rolling using the fitted bearing 32a, 32b The part of dynamic bearing 35a, 35b and bent axle 34 are slidably matched, so as to be conducive to improve between fitted bearing 32a, 32b and bent axle 34 Leakproofness, the on the other hand setting centre bore 341 in the bent axle 34, and multiple radial holes 342 are set on bent axle 34 makes each Radial hole 342 is connected with centre bore 341, and centre bore 341 is made to be connected, and make each match with low pressure oil sump a by fuel feed pump 10 Sympodium holds 32a, 32b and is correspondingly arranged at least one radial hole 342, consequently facilitating the lubricating oil in low pressure oil sump a passes through fuel feeding Pipe 10 is entered in the centre bore 341 of bent axle 34, and the lubricating oil in centre bore 341 can pass through the flow direction of radial hole 342 and be located at cooperation Rolling bearing 35a, 35b between bearing 32a, 32b and bent axle 34, so as to be conducive to improve fuel delivery, and then be conducive to improve Lubricant effect reduces the abrasion of fitted bearing 32a, 32b, bent axle 34 and rolling bearing 35a, 35b.

Further, as shown in Figure 1, each fitted bearing 32a, 32b and being equipped with rolling bearing between bent axle 34 35a、35b.So as to be conducive to improve reliability when bent axle 34 rotates.

Specifically, lubricating oil is contained in discharge chamber 41, when compressor 100 works, the lubricating oil in discharge chamber 41 can Using the pressure difference in discharge chamber 41 and housing 1, the part for not setting rolling bearing 35a, 35b of fitted bearing 32a, 32b are penetrated into Between bent axle 34, to be lubricated when the two is slidably matched to the two.

According to some embodiments of the present invention, air intake duct 11 is located at the side of the separate compression mechanism of motor 2, thus enters It can flow up in the side from motor 2 to compression mechanism to the refrigerant in housing 1, and entered by air entry 322a, 322b In corresponding cylinder 31a, 31b.

Preferably, as shown in Figure 1, radial hole 342 is two, each fitted bearing 32a, 32b correspond to a radial hole 342。

Specifically, with reference to shown in 1, at least one fitted bearing 32a, 32b are equipped with and corresponding air entry 322a, 322b The oil leak hole 321 of connection, the one end open of oil leak hole 321 are located on the internal perisporium of corresponding fitted bearing 32a, 32b.As a result, It is correspondingly arranged by oil leak hole 321 and air entry 322a, 322b, the lubricating oil discharged from oil leak hole 321 is for example to rolling At least part in the lubricating oil that bearing 35a, 35b are lubricated can be entered with air-breathing in corresponding cylinder 31a, 31b, from And realize the purpose of absorbing gas belt oil, in order to the lubricating oil in cylinder 31a, 31b when cylinder 31a, 31b work to cylinder 31a, Dependency structure such as piston in 31b is lubricated.

Preferably, connect as shown in Figure 1, being equipped on each fitted bearing 32a, 32b with corresponding air entry 322a, 322b Logical oil leak hole 321.

It is understood that the size of the diameter of oil leak hole 321, related with the number of absorbing gas belt oil mass.Optionally, draining The value range of the diameter in hole 321 is Ф 1mm- Ф 3mm, simple and reliable as a result,.

Further, the side of the separate compression mechanism of rotor 21 is equipped with fan 9, and fan 9 is rotated synchronously with rotor 21, wind The lubricating oil that fan 9 is rotated such that in low pressure oil sump a is entered by fuel feed pump 10 in centre bore 341.For example, as shown in Figure 1, Air intake duct 11 is located at the side of the separate compression mechanism of motor 2, and fuel feed pump 10 is located at one of the separate air intake duct 11 in housing 1 Side when fan 9 is rotated with rotor 21, can generate certain negative pressure near fan 9, so as to the lubricating oil in low pressure oil sump a It can be entered in centre bore 341 by fuel feed pump 10.

In some embodiments of the invention, it is moved between the inner bottom wall of the periphery wall of motor 2 and housing 1 equipped with the first oil stream Channel 7, the circulation area of the first oil flow passage 7 is S_{Under electricity}, the second oil stream is equipped between compression mechanism and the inner bottom wall of housing 1 Dynamic channel 8, the circulation area of the second oil flow passage 8 is S_Pressure, wherein S_Pressure>1.5S_{Under electricity}.Consequently facilitating lubricating oil is in housing 1 Circulation between the different location of bottom.

For example, when bent axle 34 is passed through equipped with above-mentioned centre bore 341 and above-mentioned centre bore 341 in the axial direction of bent axle 34 Bent axle 34 is worn, when fuel feed pump 10 is connected with one end of the separate motor 2 of centre bore 341, the lubricating oil in low pressure oil sump a can pass through Fuel feed pump 10 is entered in centre bore 341, and a part of lubricating oil in centre bore 341 can flow to the axis of rolling by radial hole 342 35a, 35b are held to be lubricated to rolling bearing 35a, 35b, another part lubricating oil in centre bore 341 is out of centre bore 341 After outflow, the bottom of the housing 1 of the side of neighbouring motor 2 can be flowed to, which passes through the first oil flow passage 7 successively The bottom of the housing 1 of neighbouring fuel feed pump 10 is flow back into the second oil flow passage 8, the parts of lubricating oil is further across fuel feed pump 10 flow to centre bore 341, so as to form oily cycle.

According to some embodiments of the present invention, the first refrigerant passage 5 is limited between the internal perisporium of motor 2 and housing 1, the The circulation area of one refrigerant passage 5 is S_{On electricity}, between compression mechanism and the inner roof wall of housing 1 be equipped with the second refrigerant passage 6, second The circulation area of refrigerant passage 6 is S_{In pressure}, wherein S_{In pressure}>1.5S_{On electricity}.The refrigerant in housing 1 is entered from air intake duct 11, can be passed through First refrigerant passage 5 flows to P2 chambers from P1 chambers, then passes through the second refrigerant passage 6 and flows to P3 chambers from P2 chambers, cold In the flow process of matchmaker, pass through S_{In pressure}>1.5S_{On electricity}, advantageously ensure that the pressure of P2 chambers and P3 chambers is generally equalized, so as to Ensure that the pressure at two air entries 322a, 322b is equal, and then advantageously ensures that the air-breathing for entering two cylinders 31a, 31b It measures identical.

It is understood that in housing 1, the pressure of P2 chambers and P3 chambers is generally equalized, and is less than P1 chambers simultaneously Interior pressure can cause the oil level of lubricating oil at P2 chambers and P3 chambers higher than P1 chambers in this way, so as to be conducive to pair The lubrication of compression mechanism.

Optionally, the difference of the indoor pressure of P1 chambers and the indoor pressure of P2 chambers is generally between 200~400Pa.

In some embodiments of the invention, as shown in Fig. 2, setting rolling bearing in same fitted bearing 32a, 32b The length of the part of 35a, 35b is L1, the length of part being slidably matched with bent axle 34 is L2, bearing module M=L1/L2, L1 Unit with L2 is millimeter, and the value range of bearing module M is 1-4.That is, the thickness of rolling bearing 35a, 35b are The length of the part being slidably matched with bent axle 34 of L1, fitted bearing 32a, 32b be L2, bearing module M=L1/L2, bearing system The value range of number M is 1-4.It is as a result, 1-4 to optimize fitted bearing 32a, 32b by the value range of bearing module M The fit dimension of cooperation and the part for not setting described rolling bearing 35a, 35b of fitted bearing 32a, 32b are rolled with bent axle 34 With the fit dimension being slidably matched of bent axle 34, be conducive to improve the leakproofness between fitted bearing 32a, 32b and bent axle 34.

Specifically, the length of the part being slidably matched with bent axle 34 of fitted bearing 32a, 32b be L2, fitted bearing 32a, Radial clearance between the part being slidably matched with bent axle 34 of 32b and bent axle 34 is Δ A, unit for μm, lubrication rates P=Δs The unit that the value range of A/L2, wherein lubrication rates are 0.3~1.2, P for μm/mm.So as in the property for not influencing compressor 100 Under the premise of energy, it is ensured that the lubricating oil in discharge chamber 41 penetrates into fitted bearing using discharge chamber 41 and the pressure difference in housing 1 Between the part for not setting rolling bearing 35a, 35b of 32a, 32b and bent axle 34 with when the two is slidably matched to the two into Row lubrication, improves lubricant effect.

In some embodiments of the invention, it is equipped with sealing between each fitted bearing 32a, 32b and retainer 4 Circle, so as to fulfill the reliable sealing to discharge chamber 41.

Optionally, low back pressure horizontal compressor 100 further includes muffler, and each cover board 33a, 33b are equipped with the noise reduction Device, the refrigerant in cylinder 31a, 31b can be discharged to from the exhaust outlet on partition board in muffler, and are arranged by muffler to row Air cavity 41.

Specifically he, as shown in figures 1 and 3, is equipped with oily cap 101, fuel feed pump 10 is worn in one end of the separate motor 2 of bent axle 34 Oily cap 101 is crossed to be connected respectively with centre bore 341 and low pressure oil sump a.

The structure of the low back pressure horizontal compressor 100 of a specific embodiment of the invention is carried out below with reference to Fig. 1-Fig. 2 It is described in detail.

As shown in Figure 1, the low back pressure horizontal compressor 100 of the present embodiment includes housing 1, compression mechanism and motor 2.

Specifically, when motor 2 and compression mechanism are located in housing 1, three chambers connected can will be divided into housing 1 Room.P1 chambers between motor 2 and the right side wall of housing 1 as shown in Figure 1, between motor 2 and compression mechanism P2 chambers and the P3 chambers between the left side wall of compression mechanism and housing 1.

As shown in Figure 1, compression mechanism and motor 2 are set on inside housing 1, the bottom of housing 1 is equipped with low pressure oil sump a.Motor 2 Periphery wall and housing 1 inner bottom wall between be equipped with the first oil flow passage 7, set between compression mechanism and the inner bottom wall of housing 1 There is the second oil flow passage 8, the first refrigerant passage 5, compression mechanism and housing 1 are limited between motor 2 and the internal perisporium of housing 1 Inner roof wall between be equipped with the second refrigerant passage 6.

Housing 1 is equipped with air intake duct 11 and exhaust pipe 12, and the side that air intake duct 11 is located at the separate compression mechanism of motor 2 is Air intake duct 11 is located on the right side wall of housing 1, is connected in air intake duct 11 and housing 1.When low back pressure horizontal compressor 100 is used in system When in cooling system, the refrigerant after exchanging heat in refrigeration system can be entered from air intake duct 11 in housing 1, the compressed mechanism compression of refrigerant Afterwards, it is discharged from exhaust pipe 12.

As shown in Figure 1, compression mechanism includes two cylinder 31a, 31b, two fitted bearing 32a, 32b, two cover boards 33a, 33b, two rolling bearings 35a, 35b and bent axle 34.

As shown in Figure 1, two cylinders 31a, 31b are arranged at intervals in the lateral direction, the left side of the cylinder 31b on the left side is equipped with One fitted bearing 32b and right side are set there are one cover board 33b, and fitted bearing 32b is equipped with the air-breathing connected with air intake duct 11 Mouth 322b, the refrigerant entered in housing 1 from air intake duct 11 can be entered by air entry 322b in the cylinder 31b on the left side； It sets that there are one cover board 33a and right sides to set there are one fitted bearing 32a on the left of the cylinder 31a on the right, is set on fitted bearing 32a There is the air entry 322a connected with air intake duct 11, the refrigerant entered from air intake duct 11 in housing 1 can be by air entry 322a Into in the cylinder 31a on the right.

As shown in Figure 1, the left end of bent axle 34 sequentially passes through fitted bearing 32a, cylinder 31a, cover board 33a, cover board 33b, gas Cylinder 31b and fitted bearing 32b.Bent axle 34 and the rotor 21 of motor 2 coordinate, and when motor 2 rotates, the rotor 21 of motor 2 can drive Dynamic crankshaft 34 rotates, and bent axle 34 can be realized when rotating compresses the refrigerant in two cylinders 31a, 31b.

As shown in Figure 1, two fitted bearings 32a, 32b are connected by retainer 4 with the discharge chamber for limiting a closing 41, each cylinder 31a, 31b are connected by being located at the exhaust outlet on cover board 33a, 33b with discharge chamber 41, and exhaust pipe 12 passes through shell Body 1 and retainer 4 are extend into discharge chamber 41.The bottom of discharge chamber 41 is contained with lubricating oil.

Specifically, between the axle journal of each fitted bearing 32a, 32b and bent axle 34 be equipped with described rolling bearing 35a, 35b and The part for not setting rolling bearing 35a, 35b of each fitted bearing 32a, 32b and bent axle 34 are slidably matched.Specifically, such as Fig. 1 institutes Show, the part for not setting rolling bearing 35a, 35b of fitted bearing 32a, 32b are set adjacent to cover board 33a, 33b.It is contained in discharge chamber 41 Lubricating oil is placed with, when compressor 100 works, the lubricating oil in discharge chamber 41 can utilize discharge chamber 41 and the pressure difference in housing 1, It penetrates between the part for not setting rolling bearing 35a, 35b of fitted bearing 32a, 32b and bent axle 34, to be slided in the two The two is lubricated during cooperation.

The centre bore 341 for running through bent axle 34 in the axial direction is equipped in bent axle 34, is set on bent axle 34 there are two radial hole 342, Each radial hole 342 is connected with centre bore 341, and the left end of centre bore 341 is connected by fuel feed pump 10 with low pressure oil sump a, each Fitted bearing 32a, 32b are correspondingly arranged with a radial hole 342.Each fitted bearing 32a, 32b are equipped with and corresponding air-breathing The oil leak hole 321 of mouth 322a, 322b connection, the one end open of oil leak hole 321 are located at the inner circumferential of corresponding fitted bearing 32a, 32b On wall.The value range of the diameter of oil leak hole 321 is Ф 1mm- Ф 3mm, simple and reliable as a result,.

The side of the separate compression mechanism of rotor 21 is equipped with fan 9, and fan 9 rotates synchronously with rotor 21, fan 9 with turn When son 21 rotates, certain negative pressure can be generated near fan 9, so as to which the lubricating oil in low pressure oil sump a can pass through fuel feed pump 10 It enters in centre bore 341, a part of lubricating oil in centre bore 341 can flow to rolling bearing 35a, 35b by radial hole 342 It, can after another part lubricating oil in centre bore 341 is flowed out out of centre bore 341 to be lubricated to rolling bearing 35a, 35b The bottom of the housing 1 of the side of the neighbouring motor 2 of flow direction, the parts of lubricating oil is successively by the first oil flow passage 7 and the second oil Flow channel 8 flow back into the bottom of the housing 1 of neighbouring fuel feed pump 10, during which flows to further across fuel feed pump 10 Heart hole 341, so as to form oily cycle.

The circulation area of first oil flow passage 7 is S_{Under electricity}, the circulation area of the second oil flow passage 8 is S_Pressure, wherein S_Pressure >1.5S_{Under electricity}.Consequently facilitating circulation of the lubricating oil between the different location of the bottom of housing 1.

The circulation area of first refrigerant passage 5 is S_{On electricity}, the second refrigerant is equipped between compression mechanism and the inner roof wall of housing 1 Channel 6, the circulation area of the second refrigerant passage 6 is S_{In pressure}, wherein S_{In pressure}>1.5S_{On electricity}.It is entered from air intake duct 11 cold in housing 1 Matchmaker can flow to P2 chambers from P1 chambers by the first refrigerant passage 5, then pass through the second refrigerant passage 6 and flow to P3 from P2 chambers Chamber in the flow process of refrigerant, passes through S_{In pressure}>1.5S_{On electricity}, advantageously ensure that the pressure of P2 chambers and P3 chambers substantially It is equal, so as to ensure that the pressure at two air entries 322a, 322b is equal, and then advantageously ensure that enter two cylinder 31a, The inspiratory capacity of 31b is identical.

As shown in Fig. 2, the length that the part of rolling bearing 35a, 35b is set in same fitted bearing 32a, 32b be L1, The length for the part being slidably matched with bent axle 34 is L2, and the unit of bearing module M=L1/L2, L1 and L2 is millimeter, bearing system The value range of number M is 1-4.

Radial clearance between the part being slidably matched with bent axle 34 of fitted bearing 32a, 32b and bent axle 34 is Δ A, Unit for μm, the unit that lubrication rates P=Δ A/L2, the wherein value range of lubrication rates be 0.3~1.2, P be μm/mm.Thus Under the premise of the performance for not influencing compressor 100, it is ensured that the lubricating oil in discharge chamber 41 is using in discharge chamber 41 and housing 1 Pressure difference penetrates between the part for not setting rolling bearing 35a, 35b of fitted bearing 32a, 32b and bent axle 34 to carry out in the two The two is lubricated when being slidably matched, improves lubricant effect.

Refrigeration system according to embodiments of the present invention, including above-mentioned compressor 100.

Refrigeration system according to embodiments of the present invention is simple in structure, compact by setting above-mentioned compressor 100.

In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc. Term should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected or integral；Can be that machinery connects It connects or is electrically connected or can communicate each other；It can be directly connected, can also be indirectly connected by intermediary, it can be with It is the interaction relationship of connection inside two elements or two elements, unless otherwise restricted clearly.For this field For those of ordinary skill, the concrete meaning of above-mentioned term in the present invention can be understood as the case may be.

In the description of this specification, reference term " one embodiment ", " example ", " is specifically shown " some embodiments " 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 are not It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office It is combined in an appropriate manner in one or more embodiments or example.In addition, without conflicting with each other, the skill of this field Art personnel can tie the different embodiments or examples described in this specification and the feature of different embodiments or examples It closes and combines.

Although the embodiments 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

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

Housing, the housing are equipped with air intake duct and exhaust pipe, are connected in the air intake duct and the housing, the bottom of the housing Portion is equipped with low pressure oil sump；

Motor, the motor are located in the housing；

Compression mechanism, the compression mechanism are located in the housing, and the compression mechanism includes two cylinders, two fitted shafts It holds, two cover boards, bent axle and rolling bearing, the side away from each other of described two cylinders are respectively equipped with a fitted shaft Hold, the side toward each other of described two cylinders is respectively equipped with a cover board, each fitted bearing be equipped with The air entry of the air intake duct connection, described two fitted bearings are connected by retainer with the exhaust for limiting a closing Chamber, the exhaust outlet of each cylinder are connected with the discharge chamber, and the exhaust pipe is extend into the discharge chamber, the bent axle With two fitted bearing cooperations and the rotor engagement of the bent axle and the motor, at least one fitted bearing and the song Match with the bent axle slip part for not setting the rolling bearing that the rolling bearing and the fitted bearing are equipped between axis It closes, centre bore is equipped in the bent axle, the bent axle is equipped with multiple radial holes, and each radial hole connects with the centre bore Logical, the centre bore is connected by fuel feed pump with the low pressure oil sump, each fitted bearing and at least one radial direction Hole is correspondingly arranged.

2. low back pressure horizontal compressor according to claim 1, which is characterized in that lubrication is contained in the discharge chamber Oil.

3. low back pressure horizontal compressor according to claim 1, which is characterized in that the air intake duct is located at the motor Side far from the compression mechanism.

4. low back pressure horizontal compressor according to claim 1, which is characterized in that set at least one rolling bearing There is the oil leak hole with the corresponding air entry connection, the one end open of the oil leak hole is located at the inner circumferential of corresponding fitted bearing On wall.

5. low back pressure horizontal compressor according to claim 4, which is characterized in that the value model of the diameter of the oil leak hole It encloses for Ф 1mm- Ф 3mm.

6. low back pressure horizontal compressor according to claim 1, which is characterized in that the separate compressor of the rotor The side of structure is equipped with fan, and the fan is rotated synchronously with the rotor, and the fan is rotated such that in the low pressure oil sump Lubricating oil entered in the centre bore by the fuel feed pump.

7. low back pressure horizontal compressor according to claim 3, which is characterized in that the inner circumferential of the motor and the housing The first refrigerant passage is limited between wall, the second refrigerant passage is equipped between the compression mechanism and the inner roof wall of the housing.

8. low back pressure horizontal compressor according to claim 7, which is characterized in that the circulating face of first refrigerant passage Product is S_{On electricity}, the circulation area of second refrigerant passage is S_{In pressure}, wherein S_{In pressure}>1.5S_{On electricity}。

9. the low back pressure horizontal compressor according to any one of claim 1-8, which is characterized in that the periphery of the motor The first oil flow passage is equipped between the inner bottom wall of wall and the housing, between the compression mechanism and the inner bottom wall of the housing Equipped with the second oil flow passage.

10. low back pressure horizontal compressor according to claim 9, which is characterized in that the stream of first oil flow passage Logical area is S_{Under electricity}, the circulation area of second oil flow passage is S_Pressure, wherein S_Pressure>1.5S_{Under electricity}。

11. low back pressure horizontal compressor according to claim 1, which is characterized in that set in the same fitted bearing The length for putting the part of the rolling bearing is L1, the length of part being slidably matched with the bent axle is L2, bearing module M= The value range of L1/L2, the bearing module M are 1~4.

12. low back pressure horizontal compressor according to claim 1, which is characterized in that the fitted bearing with the song The length for the part that axis is slidably matched is L2, the part being slidably matched with the bent axle of the fitted bearing and the bent axle it Between radial clearance for Δ A, lubrication rates P=Δ A/L2, the wherein value range of lubrication rates are 0.3~1.2.

13. a kind of refrigeration system, which is characterized in that including the low back pressure Horizontal type pressure according to any one of claim 1-12 Contracting machine.