CN206972516U

CN206972516U - Screw compressor

Info

Publication number: CN206972516U
Application number: CN201720680134.1U
Authority: CN
Inventors: 刘树清; 黄柏英; 沈宝生; 梁卫恒
Original assignee: Midea Group Co Ltd; Guangdong Midea HVAC Equipment Co Ltd
Current assignee: Guangdong Midea Environmental Technologies Co Ltd
Priority date: 2017-06-12
Filing date: 2017-06-12
Publication date: 2018-02-06
Anticipated expiration: 2027-06-12

Abstract

The utility model discloses a kind of screw compressor, including：Housing, housing are provided with air entry and exhaust outlet；Compression mechanical part, compression mechanical part are located in housing, and compression mechanical part includes bent axle, fixed scroll, orbiter and balance element, and bent axle has the eccentric part coordinated with orbiter, and balance element is located on bent axle；Motor, motor is located in housing and including stator and rotor, it is enclosed on outside rotor on bent axle to drive crank rotation, rotor includes Part I and Part II, Part II is provided with the through hole that at least one axle in bent axle extends upward through rotor, when screw compressor is run, Part I and Part II it is of poor quality caused by the first eccentric force with the second eccentric power cooperation caused by balance element to balance centrifugal force caused by eccentric part and orbiter.Simple in construction according to screw compressor of the present utility model, cost is relatively low, while the functional of motor, reliability are high.

Description

Screw compressor

Technical field

Field of fluid machinery is the utility model is related to, more particularly, to a kind of screw compressor.

Background technology

Screw compressor because its efficiency high, small volume, light weight, operate steadily the advantages that be widely used in air-conditioning and In the systems such as heat pump.In the course of work of screw compressor, the eccentric operating of the eccentric part of orbiter and bent axle can produce Centrifugal force, in order to overcome above-mentioned centrifugal force, in correlation technique, main balance weight is set on bent axle, while at the end of rotor body Portion sets secondary balance weight.However, because secondary balance weight is nonmagnetic substance, it is different from the material of rotor body, and secondary balance weight Need with rotor body to be connected by way of screw or riveting, it is complicated so as to cause the part of screw compressor more, Processing efficiency is low, cost is high.

Moreover, during screw compressor continuously works, the rotor of electronics runs at high speed so that the stator of motor and Rotor heating heats up, the too high Performance And Reliability that can influence motor of temperature.In correlation technique, the refrigerant after overcompression is arranged Into the high pressure chest where motor so that passage flowing of the refrigerant between stator and the housing of screw compressor, to reach pair The purpose that motor is cooled.However, refrigerant can only cool down the stator of motor in said process, it is impossible to cool down motor center section Rotor, so as to cooling effect it is bad, have impact on the reliability of motor so that the performance of motor can not be played further.

Utility model content

The utility model is intended at least solve one of technical problem present in prior art.Therefore, the utility model carries Go out a kind of screw compressor, the structure of the screw compressor is simple, and cost is relatively low, while functional, the reliability of motor It is higher.

According to the screw compressor of the utility model embodiment, including：Housing, the housing are provided with air entry and exhaust Mouthful；Compression mechanical part, the compression mechanical part are located in the housing, and the compression mechanical part includes bent axle, fixed scroll, moved Scroll plate and balance element, the bent axle have the eccentric part coordinated with the orbiter, and the balance element is located at the bent axle On；Motor, the motor are located in the housing and including stators and rotor, and the rotor is enclosed on the bent axle to drive outside Crank rotation, the rotor include Part I and Part II, and the Part II is provided with least one in the bent axle Axle extend upward through the through hole of the rotor, during the screw compressor operation, the Part I and the Part II First eccentric force and the second eccentric power cooperation caused by the balance element caused by of poor quality are to balance the eccentric part and described Centrifugal force caused by orbiter.

According to the screw compressor of the utility model embodiment, by setting at least one edge on the Part II of rotor The through hole for axially penetrating through rotor of bent axle so that Part I and the Part II generation of rotor are of poor quality, so as in scroll compression When contracting machine is run, it is above-mentioned it is of poor quality caused by the second eccentric power cooperation caused by the first eccentric force and balance element to balance eccentric part With orbiter caused by centrifugal force, so as to reduce the part of screw compressor, reduce cost, while motor is realized Good cooling, it is ensured that the Performance And Reliability of motor.

According to some embodiments of the utility model, on the cross section of the rotor, the Zhou Changwei of the Part II The half of the rotor overall circumference, consequently facilitating through hole is arranged on the second portion.

According to some embodiments of the utility model, the through hole is multiple, is led to so as to be set according to actual conditions The number in hole, preferably to meet practical application.

According to some embodiments of the utility model, circumferential uniform intervals distribution of multiple through holes along the rotor, In order to grasp the ropy position of centre of gravity of the position of centre of gravity of Part II, Part I and Part II, so as to facilitate The assembling of rotor.

According to some embodiments of the utility model, the shape of multiple through holes is identical, so as to facilitate multiple through holes Processing.

According to some embodiments of the utility model, the cross section of the through hole is formed as polygon, circle or ellipse, So that the various shapes of through hole.

According to some embodiments of the utility model, the center of gravity of the balance element and the center of gravity of the Part II are located at institute The homonymy of bent axle is stated, so as to which caused first eccentric force of poor quality can preferably coordinate with the second eccentric force caused by balance element To balance centrifugal force caused by eccentric part and orbiter operating.

According to some embodiments of the utility model, in the first plane, the orthographic projection of the center of gravity of the balance element and institute It is the first line to state the line between the orthographic projection of the central axis of bent axle, the orthographic projection of the center of gravity of the Part II and described Line between the orthographic projection of the central axis of bent axle is the second line, the folder between first line and second line Angle is α, and α meets：α≤10 °, first plane are the cross section of the rotor so that the first eccentric force and the second eccentric force Further can preferably it coordinate to balance centrifugal force caused by eccentric part and orbiter operating.

According to some embodiments of the utility model, oil sump is provided with the housing, is formed in the axial direction in the bent axle The Oil Guide part extending into the oil sump is provided with through its oil supplying hole, in the oil supplying hole, so as to the lubricating oil in oil sump Bearing, orbiter and fixed scroll can be lubricated successively, to extend the life-span of screw compressor.

According to some embodiments of the utility model, the aperture of the part provided with the Oil Guide part of the oil supplying hole is big In the aperture of the remainder of the oil supplying hole, it is easy to lubricating oil to flow into oil supplying hole, and flowed up along oil supplying hole.

Additional aspect and advantage of the present utility model will be set forth in part in the description, partly by from following description In become obvious, or by it is of the present utility model practice recognize.

Brief description of the drawings

Of the present utility model above-mentioned and/or additional aspect and advantage will in the description from combination accompanying drawings below to embodiment Become obvious and be readily appreciated that, wherein：

Fig. 1 is the profile according to the screw compressor of the utility model embodiment；

Fig. 2 is the assembling schematic diagram of the bent axle of the screw compressor shown in Fig. 1, balance element, rotor and Oil Guide part；

Fig. 3 is another assembling schematic diagram of bent axle shown in Fig. 2, balance element, rotor and Oil Guide part；

Fig. 4 is the profile of the rotor shown in Fig. 2；

Fig. 5 is the top view of the rotor shown in Fig. 4.

Reference：

Screw compressor 100, the first line 100a, the second line 100b,

Housing 1, air entry 1a, exhaust outlet 1b, oil sump 1c, upper lid 11, casing 12, lower cover 13,

Compression mechanical part 2, bent axle 21, oil supplying hole 21a, eccentric part 211,

Fixed scroll 22, back pressure hole 22a, orbiter 23, balance element 24,

Motor 3, stator 31, rotor 32, Part I 321, Part II 322, through hole 322a,

Oil Guide part 4, the first frame 5, spill port 5a, back pressure cavity 5b, the second frame 6.

Embodiment

Embodiment of the present utility model is described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning Same or similar element is represented to same or similar label eventually or there is the element of same or like function.Below by ginseng The embodiment for examining accompanying drawing description is exemplary, is only used for explaining the utility model, and it is not intended that to of the present utility model Limitation.

In description of the present utility model, it is to be understood that term " " center ", " vertical ", " longitudinal direction ", " transverse direction ", The orientation or position relationship of the instruction such as " on ", " under ", "left", "right", " bottom ", " interior ", " outer ", " axial direction ", " circumference " be based on Orientation shown in the drawings or position relationship, it is for only for ease of description the utility model and simplifies description, rather than instruction or dark Show that the device of meaning or element there must be specific orientation, with specific azimuth configuration and operation, thus it is it is not intended that right Limitation of the present utility model.In addition, define " first ", the feature of " second " can express either implicitly include one or More this feature.In description of the present utility model, unless otherwise indicated, " multiple " are meant that two or more.

, it is necessary to which explanation, unless otherwise clearly defined and limited, term " are pacified in description of the present utility model Dress ", " connected ", " connection " should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integratedly Connection；Can be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected by intermediary, It can be the connection of two element internals.For the ordinary skill in the art, above-mentioned art can be understood with concrete condition Concrete meaning of the language in the utility model.

Screw compressor 100 below with reference to Fig. 1-Fig. 5 descriptions according to the utility model embodiment.

As Figure 1-Figure 5, according to the screw compressor 100 of the utility model embodiment, including housing 1, compression mechanism Portion 2 and motor 3.

Housing 1 is provided with air entry 1a and exhaust outlet 1b, and compression mechanical part 2 is located in housing 1, and compression mechanical part 2 includes Bent axle 21, fixed scroll 22, orbiter 23 and balance element 24, bent axle 21 have the eccentric part 211 coordinated with orbiter 23, Balance element 24 is located on bent axle 21.Motor 3 is located in housing 1, and motor 3 includes stator 31 and rotor 32, is enclosed on outside rotor 32 To drive bent axle 21 to rotate on bent axle 21, rotor 32 includes Part I 321 and Part II 322, and Part II 322 is provided with At least one axle in bent axle 21 extends upward through the through hole 322a of rotor 32, when screw compressor 100 is run, Part I 321 With Part II 322 it is of poor quality caused by the second eccentric power cooperation caused by the first eccentric force and balance element 24 to balance bias Centrifugal force caused by portion 211 and orbiter 23.

For example, as Figure 1-Figure 5, housing 1 can include upper lid 11, casing 12 and the lower cover 13 being sequentially connected up and down, Wherein casing 12 can be with substantially cylindrical, and air entry 1a and exhaust outlet 1b can be located on casing 12, but not limited to this, and inhales Air intake duct is provided with gas port 1a, blast pipe is provided with exhaust outlet 1b.Compression mechanical part 2 can be located at the top in housing 1, quiet whirlpool Capstan 22 can be fixed in the first frame 5 in housing 1, and the first frame 5 is fixedly linked with housing 1.Eccentric part 211 can be set In the upper end of bent axle 21, and eccentric part 211 coordinates to drive orbiter 23 to do eccentric operating with orbiter 23 so that up and down The compression chamber of multiple crescent cylinders is limited between the orbiter 23 and fixed scroll 22 of fastening.Balance element 24 can be arranged On bent axle 21, and balance element 24 and the eccentric setting of bent axle 21, that is to say, that in the center of gravity of balance element 24 and the rotation of bent axle 21 Eccentric throw be present between mandrel line, during being rotated in bent axle 21, drive the eccentric rotary of balance element 24 to produce second Eccentric force.Motor 3 can be located at the lower section of the first frame 5, wherein, rotor 32 is located inside stator 31, and bent axle 21, which is located in, to be turned In the centre bore of son 32 so that rotor 32, which rotates, to be rotated by band dynamic crankshaft 21 to drive orbiter 23 to operate.Rotor 32 can be superimposed by some silicon steel sheets and form, formed with least one along bent axle 21 wherein on the Part II 322 of rotor 32 The through hole 322a of the upper and lower end face of rotor 32 is axially penetrated through, and through hole 322a can vertically extend, so as to Part I 321 is different from the quality of Part II 322, have it is of poor quality, it is above-mentioned of poor quality to produce during rotor 32 rotates Raw first eccentric force, so as to which the first eccentric force and the second eccentric power cooperation are transported with balancing eccentric part 211 and the bias of orbiter 23 Centrifugal force caused by turning.

Furthermore, when screw compressor 100 is run, rotor 32 drives orbiter 23 to do eccentric fortune by bent axle 21 Turn, refrigerant flow to multiple compression chambers by being limited between orbiter 23 and fixed scroll 22 from air intake duct by air entry 1a Interior, the high pressure refrigerant formed after the completion of compression can be discharged in discharge chamber upwards by steam vent, and then high pressure refrigerant passes sequentially through Between between the gap between gap, the first frame 5 and housing 1, stator 31 and housing 1 between fixed scroll 22 and housing 1 Gap flow to the lower section of motor 3 from up to down, and then high pressure refrigerant is bottom-up passes through through hole 322a with to the rotor inside motor 3 32 are cooled down, are cooled, and certainly, in the process, high pressure refrigerant can be with bottom-up through stator 31 and rotor 32 Gap, final high pressure refrigerant discharged by exhaust outlet 1b from blast pipe.

Thus, at least one rotor 32 is axially penetrated through along bent axle 21 by being set on the Part II 322 of rotor 32 Through hole 322a so that the Part I 321 and Part II 322 of rotor 32 produce it is of poor quality, so as in screw compressor 100 Running, above-mentioned caused first eccentric force of poor quality is with the second eccentric power cooperation caused by the eccentric rotary of balance element 24 with flat Weigh centrifugal force caused by eccentric part 211 and the eccentric operating of orbiter 23, so as to ensure the even running of screw compressor 100 Under the premise of, without setting secondary balance weight, the structure of rotor 32 is simplified, reduces the part of screw compressor 100, reduces into This, improves processing efficiency, meanwhile, refrigerant can be cooled down by through hole 322a to the rotor 32 inside motor 3, to motor 3 realize good cooling, it is ensured that the Performance And Reliability of motor 3.

According to the screw compressor 100 of the utility model embodiment, by set on the Part II 322 of rotor 32 to A few through hole 322a for axially penetrating through rotor 32 along bent axle 21 so that the Part I 321 and Part II 322 of rotor 32 Produce of poor quality, so as to when screw compressor 100 run, above-mentioned caused first eccentric force of poor quality and balance element 24 produce The second eccentric power cooperation to balance centrifugal force caused by eccentric part 211 and orbiter 23, so as to reduce screw compressor 100 part, cost is reduced, while good cooling is realized to motor 3, it is ensured that the Performance And Reliability of motor 3.

In specific embodiment of the utility model, on the cross section of rotor 32, the Zhou Changwei rotors of Part II 322 The half of 32 overall circumferences.For example, as shown in Figure 3 and Figure 5, rotor 32 is generally formed into columnar structured, and vertical along rotor 32 cuts Face divides rotor 32 for Part I 321 and Part II 322, the half of the overall circumference of Zhou Changwei rotors 32 of Part II 322, So as to facilitate arrangements of the through hole 322a on Part II 322.Here, it is necessary to which explanation, " overall circumference of rotor 32 " refers to The girth of Part I 321 and the girth sum of Part II 322.It is understood that on the cross section of rotor 32, second The girth of part 322 can also be arranged to 1/3,2/3 etc. with the ratio of the overall circumference of rotor 32 according to actual conditions, with preferably full Sufficient practical application.

In alternative embodiment of the present utility model, through hole 322a is multiple.For example, in Fig. 3 and Fig. 5 example, the Two parts 322 are provided with five through hole 322a, and circumferential uniform intervals distributions of five through hole 322a along rotor 32, consequently facilitating Position of centre of gravity, the ropy position of centre of gravity of Part I 321 and Part II 322 of Part II 322 are grasped, and then conveniently The assembling of rotor 32.

Certainly, through hole 322a can also be set to one, and when through hole 322a is multiple, multiple through hole 322a arrangement Mode can be set according to actual conditions, preferably to meet actual demand.

In some specific embodiments of the present utility model, as shown in Figure 3 and Figure 5, multiple through hole 322a shape is identical, It is high in machining efficiency so as to facilitate multiple through hole 322a processing.It is understood that multiple through hole 322a shape can also It is arranged to differ.

Alternatively, through hole 322a cross section is formed as polygon, circle or ellipse, more so as to through hole 322a shape Sample, the through hole 322a of suitable shape can be chosen according to actual conditions, preferably to meet actual demand.Certainly, through hole 322a cross section can also be other regular or irregular shapes, such as annular, petal etc..

In some embodiments of the utility model, the center of gravity of balance element 24 is located at bent axle with the center of gravity of Part II 322 21 homonymy.For example, as shown in Fig. 2-Fig. 3, the center of gravity of balance element 24 is located at the left side of bent axle 21, because through hole 322a is located at song The left side of axle 21, then the center of gravity of Part II 321 be located at the left side of bent axle 21, during screw compressor 100 is run, the Second is inclined caused by caused first eccentric force of poor quality of a part 321 and Part II 322 and the eccentric operating of balance element 24 The direction of mental and physical efforts is towards the opposite side of bent axle 21, so as to which the first eccentric force and the second eccentric force can preferably coordinate to balance partially Center portion 211 and orbiter 23 operate caused centrifugal force.

As shown in Fig. 2 because eccentric part 211 is located at the upper end of bent axle 21, rotor 32 is located at the lower section of eccentric part 211, puts down Part 24 weigh between eccentric part 211 and rotor 32, therefore during bent axle 21 and balance element 24, rotor 32 assemble, puts down The center of gravity of part 24 that weighs is located at the homonymy of bent axle 21, and the center of gravity of eccentric part 211 and balance element 24 with the center of gravity of Part II 322 Center of gravity be located at the opposite side of bent axle 21, so as to centrifugal force caused by eccentric part 211 and orbiter 23 and above-mentioned second eccentric The direction of power is towards the opposite side of bent axle 21, to realize centrifugal force caused by eccentric part 211 and orbiter 23 and the first bias The balance of power, the second eccentric force.

Further, as shown in figure 3, in the first plane, the orthographic projection of the center of gravity of balance element 24 and the center of bent axle 21 Line between the orthographic projection of axis is the first line 100a, the orthographic projection of the center of gravity of Part II 322 and the center of bent axle 21 Line between the orthographic projection of axis is the second line 100b, and the angle between the first line 100a and the second line 100b is α, α meets：α≤10 °, wherein, the first plane is the cross section of rotor 32.Thus, by setting the first line 100a and second to connect Angle between line 100b is α≤10 ° so that caused first eccentric force of poor quality of Part I 321 and Part II 322 With the eccentric operating of balance element 24 caused by the second eccentric force direction it is approximately radial on the contrary, so as to the first eccentric force and second eccentric Power further can preferably coordinate operates caused centrifugal force to balance eccentric part 211 and orbiter 23.

In some embodiments of the utility model, oil sump 1c is provided with housing 1, is formed in bent axle 21 and run through in the axial direction The Oil Guide part 4 extending into oil sump 1c is provided with its oil supplying hole 21a, oil supplying hole 21a.For example, as shown in figure 1, oil sump 1c The bottom of housing 1 can be located at, furthermore, oil sump 1c can be located in lower cover 13, axial directions of the oil supplying hole 21a along bent axle 21 The vertical upper surface and lower surface for running through bent axle 21 so that oil sump 1c passes through oil supplying hole 21a and the oil storage portion phase of the first frame 5 It is logical.Oil Guide part 4 can be located at oil supplying hole 21a bottom, and the lower end of Oil Guide part 4 is extend into oil sump 1c, so as in whirlpool Revolve compressor 100 run during, the lubricating oil in oil sump 1c can be entered by Oil Guide part 4 in oil supplying hole 21a with The bearing to the bottom of bent axle 21, orbiter 23 and fixed scroll 22 are lubricated successively, extend making for screw compressor 100 Use the life-span.

Specifically, the second frame 6 is also provided with housing 1, the second frame 6 is bent between motor 3 and oil sump 1c The bottom of axle 21 is located in the second frame 6 by bearing, to realize to the spacing of the bottom of bent axle 21.Formed with even on bent axle 21 Axis holds the aperture with oil supplying hole 21a so that the lubricating oil in oil supplying hole 21a can flow to bearing by aperture, with to bearing It is lubricated.During screw compressor 100 is run, the lubricating oil in oil sump 1c is in the presence of Oil Guide part 4 from oil Pond 1c flows up along oil supplying hole 21a, and lubricating oil flows to first after being lubricated by aperture to the bearing of the bottom of bent axle 21 In the oil storage portion of frame 5, a portion lubricating oil flows out from spill port 5a, and passes through the gap between stator 31 and housing 1 It is back in oil sump 1c downwards, another part lubricating oil flows between orbiter 23 and fixed scroll 22 compression chamber limited It is interior to be lubricated to orbiter 23 and fixed scroll 22.

In specific embodiment of the utility model, as depicted in figs. 1 and 2, oil supplying hole 21a's is provided with Oil Guide part 4 The aperture of remainder of the partial aperture more than oil supplying hole 21a, in order to which the lubricating oil in oil sump 1c is in the work of Oil Guide part 4 Flowed into oil supplying hole 21a with lower, and flowed up along oil supplying hole 21a.

As shown in figure 1, back pressure cavity 5b is also formed with housing 1, and back pressure cavity 5b communicates with compression chamber, the refrigerant of compression can To be flow to by the back pressure hole 22a on fixed scroll 22 in back pressure cavity 5b, the pressure value in back pressure cavity 5b is set to be in air entry 1a Pressure value and exhaust outlet 1b pressure value between.The bottom of orbiter 23 is acting upwardly on by the gas in back pressure cavity 5b Portion, to balance in compression chamber refrigerant to the uneven axial force and torque of orbiter 23.

According to other compositions of the screw compressor 100 of the utility model embodiment and operate for the common skill in this area All it is known for art personnel, is not detailed herein.

In the description of this specification, reference term " one embodiment ", " some embodiments ", " illustrative examples ", The description of " example ", " specific example " or " some examples " etc. means to combine specific features, the knot that the embodiment or example describe Structure, material or feature are contained at least one embodiment or example of the present utility model.In this manual, to above-mentioned art The schematic representation of language is not necessarily referring to identical embodiment or example.Moreover, description specific features, structure, material or Person's feature can combine in an appropriate manner in any one or more embodiments or example.

While there has been shown and described that embodiment of the present utility model, it will be understood by those skilled in the art that： These embodiments can be carried out with a variety of changes, modification in the case where not departing from principle and objective of the present utility model, replaced And modification, the scope of the utility model are limited by claim and its equivalent.

Claims

A kind of 1. screw compressor, it is characterised in that including：

Housing, the housing are provided with air entry and exhaust outlet；

Compression mechanical part, the compression mechanical part are located in the housing, the compression mechanical part include bent axle, fixed scroll, Orbiter and balance element, the bent axle have the eccentric part coordinated with the orbiter, and the balance element is located at the song On axle；

Motor, the motor are located in the housing and including stators and rotor, and the rotor is enclosed on the bent axle to drive outside Dynamic crankshaft rotates, and the rotor includes Part I and Part II, and the Part II is provided with least one in the song The axle of axle extends upward through the through hole of the rotor, when the screw compressor is run, the Part I and the Part II It is of poor quality caused by the second eccentric power cooperation caused by the first eccentric force and the balance element to balance the eccentric part and institute State centrifugal force caused by orbiter.
2. screw compressor according to claim 1, it is characterised in that on the cross section of the rotor, described second The half of rotor overall circumference described in partial Zhou Changwei.
3. screw compressor according to claim 1, it is characterised in that the through hole is multiple.
4. screw compressor according to claim 3, it is characterised in that circumference of multiple through holes along the rotor is It is even to be spaced apart.
5. screw compressor according to claim 3, it is characterised in that the shape of multiple through holes is identical.
6. screw compressor according to claim 1, it is characterised in that the cross section of the through hole be formed as polygon, Circular or ellipse.
7. screw compressor according to claim 1, it is characterised in that the center of gravity of the balance element and the Part II Center of gravity be located at the homonymy of the bent axle.
8. screw compressor according to claim 7, it is characterised in that in the first plane, the center of gravity of the balance element Orthographic projection and the bent axle central axis orthographic projection between line be the first line, the center of gravity of the Part II Line between the orthographic projection of the central axis of orthographic projection and the bent axle is the second line, first line and described second Angle between line is α, and α meets：α≤10 °, first plane are the cross section of the rotor.
9. screw compressor according to claim 1, it is characterised in that oil sump is provided with the housing, in the bent axle Formation runs through its oil supplying hole in the axial direction, and the Oil Guide part extending into the oil sump is provided with the oil supplying hole.
10. screw compressor according to claim 9, it is characterised in that the oil supplying hole is provided with the Oil Guide part Part aperture be more than the oil supplying hole remainder aperture.