CN202402487U - Motor front bearing and centrifugal compressor and refrigeration device comprising same - Google Patents
Motor front bearing and centrifugal compressor and refrigeration device comprising same Download PDFInfo
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- CN202402487U CN202402487U CN2012200249932U CN201220024993U CN202402487U CN 202402487 U CN202402487 U CN 202402487U CN 2012200249932 U CN2012200249932 U CN 2012200249932U CN 201220024993 U CN201220024993 U CN 201220024993U CN 202402487 U CN202402487 U CN 202402487U
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Abstract
The utility model provides a motor front bearing and a centrifugal compressor and a refrigeration device comprising the same. The motor front bearing comprises a front bearing bush (11) and a front bearing bush positioning member (12), a front bearing primary oil supply channel (121) is arranged on the front bearing bush positioning member (12) along the radial direction, the front bearing bush (11) comprises a front bearing radial oil supply channel (112) penetrating the front bearing bush (11) along the radial direction and a front bearing circumferential oil supply groove (115) arranged at the position of an outlet of the front bearing radial oil supply channel (112), and the front bearing radial oil supply channel (112) comprises a front bearing lateral oil supply channel stretching out laterally and extending to two ends of the front bearing bush (11). The motor front bearing can improve oil supply modes of bearings, homogenizes temperature fields of radial bearings and thrust bearings, stabilizes dynamic pressure state of s thrust surface oil film, and improves stability of oil film lubrication.
Description
Technical field
The utility model relates to filed of air conditioning, in particular to a kind of motor fore bearing and comprise centrifugal compressor, the chiller plant of this bearing.
Background technique
In direct connection frequency conversion centrifugal compressor, because cancellation gear up structure, all axial forces, radial force act on motor front and back two bearings entirely, and load that bearing bears is much bigger with respect to the bearing load of band gear up structure.Therefore, the fuel feeding of bearing, lubricated seem more important.
The sliding bearing of conventional centrifugal compressor adopts circumferential fuel feeding or axial fuel system; Through the main oil supply in centre to the two ends fuel feeding; For the bearing of band thrust structure, lubricant oil often gets into the thrust structure through behind the radial component again, tends to cause the oily temperature that gets into thrust face very high like this; Through the temperature rise of thrust face, the oil temperature probably surpasses the temperature of bush material permission and lost efficacy in addition; In addition, because the oil temperature that gets in the thrust face is too high, cause lubricating oil viscosity to descend, the kinetic pressure that oil film forms descends, and does not reach the design point requirement, and is final owing to the oil film dynamic pressure causes bearing bush abrasion inadequately.
Obviously, be not all right if in direct connection frequency conversion centrifugal compressor, still adopt the fuel system of conventional bearing, therefore, need to seek a kind of bearing structure that is fit to the operating conditions of direct connection frequency-changeable compressor high speed, heavy duty more.
The model utility content
The utility model aims to provide a kind of motor fore bearing and comprises centrifugal compressor, the chiller plant of this bearing; Can improve the bearing fuel system; Even radial bearing, thrust bearing temperature field, steady propulsion face oil film dynamic pressure state, the stability of raising film lubrication.
To achieve these goals; An aspect according to the utility model; A kind of motor fore bearing is provided; Comprise the fore bearing bearing shell locating piece that the fore bearing bearing shell is outer with being set in the fore bearing bearing shell; Fore bearing bearing shell locating piece radially is provided with fore bearing master oil supply gallery, comprise on the fore bearing bearing shell fore bearing that is connected with fore bearing master oil supply gallery and radially runs through the fore bearing bearing shell radially oil supply gallery be arranged on the radially circumferential oil supply of fore bearing of the exit position of oil supply gallery of fore bearing, fore bearing radially comprises along the fore bearing side direction oil supply gallery that extends laterally and extend to end, fore bearing bearing shell two ends on the oil supply gallery.
Further; Fore bearing radially oil supply gallery is positioned at the middle part of fore bearing bearing shell; Fore bearing side direction oil supply gallery comprises fore bearing first side direction oil supply gallery and the fore bearing second side direction oil supply gallery; The fore bearing first side direction oil supply gallery extends to the first end end of fore bearing bearing shell, and the fore bearing second side direction oil supply gallery extends to the second end end of fore bearing bearing shell.
Further, fore bearing first side direction oil supply gallery and the fore bearing second side direction oil supply gallery are along the axial direction horizontal-extending of fore bearing bearing shell, and the sectional area of the fore bearing second side direction oil supply gallery is greater than the sectional area of the fore bearing first side direction oil supply gallery.
Further, fore bearing first side direction oil supply gallery and the fore bearing second side direction oil supply gallery are obliquely extended to the end of fore bearing bearing shell respectively, and the sectional area of the fore bearing second side direction oil supply gallery is greater than the sectional area of the fore bearing first side direction oil supply gallery.
Further; The inwall of fore bearing bearing shell is provided with the axial oil supply of fore bearing that the in the past first end end of bearing bush in axial direction is through to the second end end of fore bearing bearing shell; The fore bearing first side direction oil supply gallery is connected with the axial oil supply of fore bearing in the first end end of fore bearing bearing shell, and the fore bearing second side direction oil supply gallery is connected with the axial oil supply of fore bearing in the second end end of fore bearing bearing shell.
Further; The fore bearing radially entry position of oil supply gallery is provided with the fore bearing parallel connection fuel feeding distributing chute that is connected with fore bearing master oil supply gallery, and fore bearing first side direction oil supply gallery and the fore bearing second side direction oil supply gallery are in fore bearing parallel connection fuel feeding distributing chute place and the radially parallelly connected setting of oil supply gallery of fore bearing.
Further, the fore bearing first side direction oil supply gallery, the fore bearing second side direction oil supply gallery and fore bearing radially the flow area sum of oil supply gallery smaller or equal to the flow area of fore bearing parallel connection fuel feeding distributing chute.
Further, the fore bearing bearing shell comprises radially oil supply gallery of a plurality of fore bearings, and a plurality of fore bearings radially oil supply gallery evenly are provided with along the circumferential direction of fore bearing bearing shell.
Further, fore bearing parallel connection fuel feeding distributing chute along the circumferential direction winding on the outer wall of fore bearing bearing shell.
Further, the fore bearing first side direction oil supply gallery comprises and the fore bearing dispensing section and the extending section that is connected and extends to the first end end of fore bearing bearing shell with dispensing section that are connected of oil supply gallery radially that the sectional area of extending section is greater than the sectional area of dispensing section.
According to the utility model on the other hand, a kind of centrifugal compressor is provided, has comprised the motor fore bearing, this motor fore bearing is above-mentioned motor fore bearing.
One side again according to the utility model provides a kind of chiller plant, comprises centrifugal compressor, and this centrifugal compressor is above-mentioned centrifugal compressor.
Use the technological scheme of the utility model; The motor fore bearing comprises the fore bearing bearing shell locating piece that the fore bearing bearing shell is outer with being set in the fore bearing bearing shell; Fore bearing bearing shell locating piece radially is provided with fore bearing master oil supply gallery; Comprise on the fore bearing bearing shell fore bearing that is connected with fore bearing master oil supply gallery and radially runs through the fore bearing bearing shell radially oil supply gallery be arranged on the radially circumferential oil supply of fore bearing of the exit position of oil supply gallery of fore bearing, fore bearing radially comprises along the fore bearing side direction oil supply gallery that extends laterally and extend to end, fore bearing bearing shell two ends on the oil supply gallery.Because all there is load-carrying surface at the two ends of motor fore bearing, therefore, need on fore bearing, process radially and the two ends oil supply gallery of totally three directions.The oil supply gallery parallel connection of three directions is provided with; Fore bearing radially oil supply gallery is used to satisfy the lubricated needs of the radial load between rotor and the fore bearing, and two fore bearing side direction oil supply galleries then are respectively applied for the lubricated needs that satisfy between fore bearing two ends and the rotor thrust face.In the fore bearing working procedure; Since lubricant oil can be respectively through fore bearing side direction oil supply gallery and fore bearing radially oil supply gallery be lubricated and lower the temperature; Therefore, the lubricant oil that flows to the axial load-carrying surface of fore bearing can be owing to earlier not causing the oil temperature that gets into thrust face too high through getting into the thrust structure behind the axial component again, surpasses the temperature that bush material allows and lost efficacy; Can not influence lubricant oil yet and form dynamic pressure oil film, thereby improve motor rear bearing reliability of operation.
Fore bearing first side direction oil supply gallery and the fore bearing second side direction oil supply gallery are obliquely extended to the end of fore bearing bearing shell respectively, and the sectional area of the fore bearing second side direction oil supply gallery is greater than the sectional area of the fore bearing first side direction oil supply gallery.Because the axial force that the bearing shaft that the fore bearing second side direction oil supply gallery is communicated with is born to load-carrying surface is bigger; Therefore; Make the sectional area of the sectional area of the fore bearing second side direction oil supply gallery greater than the fore bearing first side direction oil supply gallery; When lubricant oil carries out the branch timing, can carry out appropriate allocation according to the sectional area of oil supply gallery, thereby guarantee that lubricant oil has better lubricated and cooling-down effect.
Description of drawings
The accompanying drawing that constitutes the part of the utility model is used to provide the further understanding to the utility model, and illustrative examples of the utility model and explanation thereof are used to explain the utility model, do not constitute the improper qualification to the utility model.In the accompanying drawings:
Fig. 1 shows the oil supply structure schematic representation according to the motor fore bearing of the embodiment's of the utility model centrifugal compressor;
Fig. 2 shows the structure for amplifying schematic representation according to the L place of the motor fore bearing of the centrifugal compressor of Fig. 1;
Fig. 3 shows the oil supply structure schematic representation according to the motor rear bearing of the embodiment's of the utility model centrifugal compressor;
Fig. 4 shows the structure for amplifying schematic representation according to the M place of the motor rear bearing of the centrifugal compressor of Fig. 3;
Fig. 5 shows the sectional structure schematic representation according to the fore bearing bearing shell of the motor fore bearing of the embodiment's of the utility model centrifugal compressor;
Fig. 6 shows the perspective view according to the fore bearing bearing shell of the motor fore bearing of the embodiment's of the utility model centrifugal compressor;
Fig. 7 shows the sectional structure schematic representation according to the rear bearing bearing shell of the motor rear bearing of the embodiment's of the utility model centrifugal compressor;
Fig. 8 shows the perspective view according to the rear bearing bearing shell of the motor rear bearing of the embodiment's of the utility model centrifugal compressor;
Fig. 9 shows the structural representation according to the rotor thrust face of the embodiment's of the utility model centrifugal compressor;
Figure 10 show according to the G-G of the rotor thrust face of the centrifugal compressor of Fig. 9 to the sectional structure schematic representation;
Figure 11 show according to the H-H of the rotor thrust face of the centrifugal compressor of Fig. 9 to the sectional structure schematic representation;
Figure 12 show according to the I-I of the rotor thrust face of the centrifugal compressor of Fig. 9 to the sectional structure schematic representation;
Figure 13 shows the structural representation according to the thrust disc thrust face of the embodiment's of the utility model centrifugal compressor; And
Figure 14 show according to the K-K of the thrust disc thrust face of the centrifugal compressor of Figure 13 to the broken section structural representation.
Embodiment
Hereinafter will and combine embodiment to specify the utility model with reference to accompanying drawing.Need to prove that under the situation of not conflicting, embodiment and the characteristic among the embodiment among the application can make up each other.
Extremely shown in Figure 6 like Fig. 1; Embodiment according to the utility model; Motor fore bearing 10 (hereinafter to be referred as fore bearing) comprises fore bearing bearing shell 11 and the fore bearing bearing shell locating piece 12 that is set in outside the fore bearing bearing shell 11; Fore bearing bearing shell locating piece 12 fixedly installs, and fore bearing bearing shell 11 is formed positioning action.
Fore bearing 10 is processed as split type structure, is being assemblied in rotor 30 backs with the pin location, and the cylindricity that keeps two-part bearing to cooperate is locked with bolt then.When fore bearing bearing shell 11 is installed; Fore bearing 10 is set on the rotor 30; Make fore bearing 10 and rotor 30 be assembled into assembly, the assembly that then fore bearing bearing shell 11 and rotor 30 is assembled into passes through bearing mating face installing and locating in fore bearing bearing shell locating piece 12.Fore bearing bearing shell locating piece 12 closely cooperates with fore bearing bearing shell 11, prevents that fore bearing bearing shell 11 from following rotor journal and rotating together.The bearing mating face is provided with seal groove; Be provided with Sealing in the seal groove; The sealing part makes and forms sealing between fore bearing bearing shell 11 and the fore bearing bearing shell locating piece 12, prevents that lubricant oil from leaking along the matching gap of fore bearing bearing shell 11 and fore bearing bearing shell locating piece 12.Behind the fixing relative position between fore bearing bearing shell 11, rotor 30 and the fore bearing bearing shell locating piece 12, with the fore bearing bearing shell 11 and fore bearing bearing shell locating piece 12 lockings of bolt with fore bearing 10.
Fore bearing bearing shell locating piece 12 comprises the fore bearing master oil supply gallery 121 that is provided with along the fore bearing radial direction; First end of fore bearing master oil supply gallery 121 is communicated to bearing shell; Second end of fore bearing master oil supply gallery 121 is communicated to oil sources, thereby lubricant oil is introduced the lubricated and cooling of participation in the fore bearing 10.
Fore bearing bearing shell 11 comprises on the bearing mating face that is arranged on fore bearing bearing shell 11, and the parallelly connected fuel feeding distributing chute 111 that is connected mutually with fore bearing master oil supply gallery 121 on the fore bearing bearing shell locating piece 12.Parallel connection fuel feeding distributing chute 111 along the circumferential direction winding of the bearing mating face (being the external cylindrical surface that cooperates with fore bearing bearing shell locating piece 12 of fore bearing bearing shell 11) of fore bearing bearing shell 11 on the outer wall of fore bearing bearing shell 11.
Fore bearing bearing shell 11 also comprises the fore bearing that is connected with parallelly connected fuel feeding distributing chute 111 radially oil supply gallery 112 and fore bearing side direction oil supply gallery.Fore bearing radially oil supply gallery 112 is positioned at the medium position of the axial direction of fore bearing bearing shell 10, runs through fore bearing bearing shell 11 along the radial direction of fore bearing bearing shell 11.Radially be provided with the circumferential oil supply 115 of fore bearing in the exit position of oil supply gallery 112 at fore bearing.The circumferential oil supply 115 of fore bearing circumferentially is provided with the oil supply that forms annular along the inwall of fore bearing bearing shell 11.The first end end that includes the past bearing bush 11 on the inwall of fore bearing bearing shell 11 in axial direction is through to the axial oil supply 116 of fore bearing of the second end end of fore bearing bearing shell 11; The axial oil supply 116 of fore bearing runs through the circumferential oil supply 115 of fore bearing; After lubricant oil gets into the circumferential oil supply 115 of fore bearing; Get into the mating part of rotor 30 and fore bearing bearing shell 11 through the axial oil supply 116 of fore bearing; And between rotor 30 and fore bearing bearing shell 11, form dynamic pressure oil film, and avoid rotor 30 to contact with the direct of fore bearing bearing shell 11, fore bearing bearing shell 11 is formed effectively protection.
Fore bearing side direction oil supply gallery comprises the fore bearing first side direction oil supply gallery 113 and the fore bearing second side direction oil supply gallery 114.The fore bearing first side direction oil supply gallery 113 is separately positioned on the radially both sides of oil supply gallery 112 of fore bearing with the fore bearing second side direction oil supply gallery 114, with radially oil supply gallery 112 parallelly connected settings of fore bearing.Fore bearing first side direction oil supply gallery 113 and the fore bearing second side direction oil supply gallery 114 are from parallelly connected fuel feeding distributing chute 111s; The fore bearing first side direction oil supply gallery 113 is obliquely extended to the first end end of fore bearing bearing shell 11, and the fore bearing second side direction oil supply gallery 114 is obliquely extended to the second end end of fore bearing bearing shell 11.
In the middle of present embodiment; The fore bearing first side direction oil supply gallery 113 is connected with the axial oil supply 116 of fore bearing in the first end end of fore bearing bearing shell 11, and the fore bearing second side direction oil supply gallery 114 is connected with the axial oil supply 116 of fore bearing in the second end end of fore bearing bearing shell 11.At fore bearing first side direction oil supply gallery 113 and the end cohesive position of the fore bearing second side direction oil supply gallery 114 with fore bearing bearing shell 11; All be provided with first and cross oil groove 117, on rotor 30, include circumferential setting and cross the branch oil groove 36 that oil groove 117 cooperates with first along the axial direction of the inwall of fore bearing bearing shell 11.
For motor fore bearing 10, because all there is load-carrying surface both sides, therefore, fore bearing 10 is processed the oil supply gallery of three directions, and oil supply gallery is all come together in the fore bearing parallel connection fuel feeding distributing chute 111.Consider rotor 30 when operation, the bearing load of 10 3 directions of fore bearing is different, therefore, needs the oil supply gallery of three directions is optimized design, many group oil supply galleries is set so that mean allocation fuel feeding oil mass.For make radially or axially fuel feeding distribute more even, as: for radially, can be on the fore bearing circumference a plurality of radially oil supply holes of mean allocation, quantity is 1～6 (also being the quantity of the parallelly connected oil supply gallery on each thrust face).Correspondingly, for the axial direction of fore bearing bearing shell 10, also process corresponding axially oil supply gallery.Specifically with regard to the fore bearing that single group oil supply gallery is set, need satisfy the fore bearing first side direction oil supply gallery 113, the fore bearing second side direction oil supply gallery 114 and fore bearing radially the flow area of oil supply gallery 112 be less than or equal to the flow area of parallelly connected fuel feeding distributing chute 111 with fore bearing.For single group oil supply gallery; Its physical dimension characteristic is following: auxilliary side-thrust face oil supply hole d1: φ 1.5～φ 3.5mm; Master thrust face oil supply hole d2: φ 4.5～φ 7.5mm; Radial bearing surface oil supply hole d3: φ 4.5～φ 7.5mm, parallelly connected fuel feeding distributing chute width w1:10～15mm, parallelly connected fuel feeding distributing chute height h1:4～8mm.If many group oil supply galleries are set; Consistent for guaranteeing that many group oil supply gallery fuel deliveries are set and single fuel delivery of organizing under the oil supply gallery situation only being set; The flow area of the radially oil supply gallery of a plurality of radially oil supply gallery flow area sums that should guarantee to be provided with when single group oil supply gallery only is set equates; And the setting of side direction oil supply gallery also is so, and when list group oil supply gallery even only was set, radially the circulation area of oil supply gallery, the first side direction oil supply gallery, the second side direction oil supply gallery was respectively A, B, C; Every group of corresponding circulation area of oil supply gallery is respectively a, b, c in the time of when being provided with N group oil supply gallery, needs to satisfy following equality:
A+B+C=N (a+b+c), and A=Na, B=Nb, C=Nc
With the view shown in Fig. 1 is example; Because the bearing that the impeller high speed rotating is produced left; Therefore the main thrust face of fore bearing is on the right side; Simultaneously in order to prevent the impeller reversing and reduce scratching of rotor cantilever segment that the left side also is provided with thrust face, so whole fore bearing has been concentrated main thrust face and two kinds of forms of auxilliary thrust face.Because two thrust face stressing conditions are different, required oil mass is also different, and therefore, the fuel feeding aperture is different.The right side is the main thrust face; Therefore; The sectional area of the fore bearing first side direction oil supply gallery 113 that the sectional area of the fore bearing second side direction oil supply gallery 114 that extends to the right along the axial direction of fore bearing bearing shell 11 extends greater than the axial direction along fore bearing bearing shell 11 to the left; Participate in lubricated and cooling so that make more lubricating oil can get into the right side thrust face, obviously, the structure that this differentiation is provided with is more reasonable.
Please combine referring to shown in Figure 2; The fore bearing first side direction oil supply gallery 113 that is positioned at the left side among this figure is made up of the different two-part in aperture; Comprise and the fore bearing dispensing section 118 and the extending section 119 that is connected and extends to the first end end of fore bearing bearing shell 11 with dispensing section 118 that are connected of oil supply gallery 112 radially that the sectional area of extending section 119 is greater than the sectional area of dispensing section 118.So being provided with is in order to change the fuel feeding flow velocity, so that make flow velocity and the stressed coupling of rotor thrust face 34 of lubricant oil in the fore bearing first side direction oil supply gallery 113.
Be provided with on two rotor thrust faces 34 and hold oil groove 31; This holds first on oil groove 31 and the fore bearing bearing shell 11 crosses oil groove 117 and is connected, and in the process of rotor rotation, first crosses lubricant oil in the oil groove 117 under the rotor action of centrifugal force; Entering is held in the oil groove 31, and accumulates.First crosses the circumferential direction setting of oil groove 117 along fore bearing bearing shell 11; After lubricant oil entering first is crossed in the oil groove 117; Can cross oil groove 117 along first circumferentially evenly distributes; Evenly flow between the axial load-carrying surface of each thrust face and fore bearing thereby cross oil groove 117, form good lubricating effect through first.
In the middle of other embodiment; The fore bearing first side direction oil supply gallery 113 and the fore bearing second side direction oil supply gallery 114 also in the past the fore bearing of bearing bush 11 radially the middle part of oil supply gallery 112 is along the axial direction horizontal-extending of fore bearing bearing shell 11, and the sectional area of the fore bearing second side direction oil supply gallery 114 is greater than the sectional area of the fore bearing first side direction oil supply gallery 113.Lubricant oil bearing bush locating piece 12 interior fore bearing master oil supply galleries 121 in the past flows into; Get into fore bearing radially in the oil supply gallery 112; And be divided into three strands; One flows to the first end end face of fore bearing bearing shell 11, lubricating between first end end face of participation fore bearing bearing shell 11 and the rotor thrust face 34; One flows to the second end end face of fore bearing bearing shell 11, lubricating between second end end face of participation fore bearing bearing shell 11 and the rotor thrust face 34; One flows to the circumferential oil supply 115 of fore bearing of fore bearing bearing shell 11, lubricating between the inwall of participation rotor 30 and fore bearing bearing shell 11.
Please combine referring to Fig. 1 to shown in Figure 4, according to the embodiment of the utility model, centrifugal compressor comprises rotor 30 and bearing unit, and bearing unit is set on the rotor 30.Bearing unit had both comprised radially load-carrying surface, also comprised axial load-carrying surface, and like this, this bearing unit plays compound action, and radial load that can bear rotor 30 also can bear axial load, and compact structure.Rotor 30 comprises the thrust face that matches with the axial load-carrying surface of bearing unit; At least one thrust face of rotor 30 is provided with and holds oil groove 31; The oil supply gallery that holds on the axial load-carrying surface of oil groove 31 and bearing unit is connected, and in the process of bearing unit work, accumulates lubricant oil.
When centrifugal compressor meets accident and stops operating; The lubricant oil that is accumulated in the oil groove 31 can discharge; Participate in lubricating between bearing unit and the rotor 30; Thereby the bearing shell to bearing unit forms protection, thereby can prevent to improve the reliability of compressor operating owing to lacking the lubricated too high tile kilning phenomenon that causes of bearing bush temperature that causes.
Bearing unit comprises above-mentioned motor fore bearing 10 and motor rear bearing 20 (hereinafter to be referred as rear bearing), and first end of rear bearing 20 is outside equipped with thrust disc 33, and thrust disc 33 is arranged on the rotor 30 through bolt.Thrust face comprises rotor thrust face 34 that cooperates with fore bearing 10 and the thrust disc thrust face 35 that cooperates with rear bearing, and fore bearing 10 is arranged between two rotor thrust faces 34 of rotor 30.
Please combine referring to Fig. 3, Fig. 4, Fig. 7 and shown in Figure 8, rear bearing 20 comprises rear bearing bearing shell 21 and rear bearing bearing shell locating piece 22.Rear bearing bearing shell locating piece 22 fixedly installs, and rear bearing bearing shell 21 is formed the positioning supports effect.Rear bearing bearing shell 21 is set on the rotor 30, and first end outside of rear bearing bearing shell 21 is set with thrust disc 33.Thrust disc 33 is connected on the rotor 30 through bolt, and rear bearing bearing shell 21 is formed axial force.
Rear bearing bearing shell locating piece 22 comprises rear bearing parallel connection fuel feeding distributing chute 221 and rear bearing master oil supply gallery 222.Rear bearing parallel connection fuel feeding distributing chute 221 is arranged on the inwall of rear bearing bearing shell locating piece 22 along circumferential direction, forms circumferential oil supply gallery.Rear bearing master oil supply gallery 222 is along the radial direction setting of rear bearing bearing shell locating piece 22, and is communicated with rear bearing parallel connection fuel feeding distributing chute 221, is used for that lubricant oil is delivered to the parallelly connected fuel feeding distributing chute 221 of rear bearing and distributes.
Rear bearing bearing shell 21 comprises the rear bearing radially circumferential oil supply of oil supply gallery 211, rear bearing 212, rear bearing side direction oil supply gallery and the axial oil supply 213 of rear bearing.Rear bearing radially oil supply gallery 211 is arranged on the neutral position of rear bearing bearing shell 21 axial directions, along the radial direction setting of rear bearing bearing shell 21, and runs through the sidewall of rear bearing bearing shell 21.The circumferential oil supply 212 of rear bearing is arranged on the radially exit position of oil supply gallery 211 of rear bearing along the circumferential direction of the inwall of rear bearing bearing shell 21, and lubricant oil is radially introduced inwall from the outer wall of rear bearing bearing shell 21.The axial oil supply 213 of rear bearing in axial direction is arranged on the inwall of rear bearing bearing shell 21; Extend to second end of rear bearing bearing shell 21 along first end of rear bearing bearing shell 21; And be connected with the circumferential oil supply 212 of rear bearing; The lubricant oil that gets in the circumferential oil supply 212 of rear bearing in axial direction is distributed between rotor 30 and the rear bearing bearing shell 21, between rotor 30 and rear bearing bearing shell 21, to form dynamic pressure oil film.
One end of rear bearing side direction oil supply gallery is communicated with rear bearing parallel connection fuel feeding distributing chute 221, and the other end extends to the first end endface position of rear bearing bearing shell 21.Rear bearing side direction oil supply gallery is arranged between rear bearing parallel connection fuel feeding distributing chute 221 and the axial oil supply 213 of rear bearing.Rear bearing side direction oil supply gallery comprises the rear bearing first side direction oil supply gallery 214 and the rear bearing second side direction oil supply gallery 215.The rear bearing first side direction oil supply gallery 214 from rear bearing radially oil supply gallery 211 extend to the first end end face of rear bearing bearing shell 21, with lubricant oil from rear bearing radially oil supply gallery 211 introduce between the thrust disc thrust face 35 of axial load-carrying surface and rotor 30 of rear bearings 20.
Rear bearing bearing shell 21 also comprises and being communicated with rear bearing parallel connection fuel feeding distributing chute 221 and along the radially heavy oilhole 216 of extension of rear bearing bearing shell 21; Heavy oilhole 216 is a blind hole, and the rear bearing second side direction oil supply gallery 215 extends laterally to the first end end of rear bearing bearing shell 21 from the end of heavy oilhole 216.
The rear bearing first side direction oil supply gallery 214 can obliquely be provided with the rear bearing second side direction oil supply gallery 215; Also can be horizontally disposed with along the axial direction of rear bearing bearing shell 21, the side direction oil supply gallery in the middle of the present embodiment is along the axial direction of rear bearing bearing shell 21 and is horizontally disposed with.The rear bearing first side direction oil supply gallery 214 and the rear bearing second side direction oil supply gallery 215 all with radially oil supply gallery 211 parallelly connected settings of rear bearing, thereby lubricant oil is delivered to the axial carrying face of rear bearing 20 and supporting plane radially respectively.
The endface position that cooperates with thrust disc thrust face 35 at rear bearing bearing shell 21; Be provided with second along circumferential direction and cross oil groove; Second crosses oil groove is communicated with the axial oil supply 213 of rear bearing that holds oil groove 31 and rear bearing bearing shell 21 on the thrust disc thrust face 35, the axial oil supply 213 interior lubricant oil of rear bearing is delivered to through the second mistake oil groove holds in the oil groove 31.
For the motor rear bearing owing to have only radially a load-carrying surface and an axial load-carrying surface; Therefore; Bearing is processed the oil supply gallery of both direction, respectively lubricant oil is caused two end faces of this bearing, and oil supply gallery is come together in the rear bearing parallel connection fuel feeding distributing chute 221.For the end thrust face, more even in order to make distribution of lubrication oil, 4 oil supply galleries of mean allocation on circumference, its physical dimension characteristic is following: radial bearing surface oil supply hole d4: φ 4.5～φ 7.5mm, thrust face oil supply hole d5: φ 1～φ 4mm.
Because the side direction oil supply gallery and the radially parallelly connected setting of oil supply gallery of fore bearing 10 and rear bearing 20, be delivered in the process of axial load-carrying surface of thrust face and bearing of rotor at lubricant oil, do not pass through the heating of the axial mating part between rotor 30 and the bearing; Therefore; The oily temperature that gets into thrust face can satisfy cooling and lubricated effect, and lubricant oil can have better viscosity, forms to stablize dynamic pressure oil film; Thereby bush material is formed effective protection, prevent the bearing bush abrasion of bearing.
Please combine referring to Fig. 9 to hold oil groove 31 and to be the concave inward structure on the thrust face that is arranged on rotor 30 to shown in Figure 14, this concave inward structure forms holding space, and is communicated with oil supply gallery on the bearing unit.In when work, hold oil groove 31 and cooperates with the load-carrying surface of bearing unit and form receiving cavity, thereby it is interior and accumulate to make lubricant oil hold oil groove 31 through the oil supply gallery entering.
Please specifically referring to Fig. 9 to shown in Figure 12, these figures mainly illustrate is the view structure of the axial direction of the rotor thrust face 34 that cooperates with fore bearing 10.As can be seen from the figure; Hold oil groove 31 view in axial direction and be shaped as U-shaped; View along the radial direction of rotor 30 is shaped as interior concave circular arc; And this holds oil groove 31 and successively decreases along the degree of depth of the radially extension direction of rotor 30, comprises that be positioned at rotor radial direction innermost layer straight holds the oil section and hold the arc that the oil section is connected with this and hold the oil section.Hold oil groove 31 view shape in axial direction and also can be ellipse or other shape.
The outward edge that holds oil groove 31 be provided with from hold oil groove 31 extend to rotor thrust face 34 outer periphery unload oil groove 32, this unloads oil groove 32 and holds the oil section with the arc that holds oil groove 31 and link to each other, will hold oil groove 31 and be connected with the emptying space of outside.Lubricant oil to motor fore bearing 10 lubricated and take away heat after; Under action of centrifugal force, come together in and hold in the oil groove 31; After in holding oil groove 31, accumulating enough lubricant oil, unload oil groove 32 and can regulate, make and hold oil groove 31 and can realize dynamically holding oil the lubricant oil that hold in the oil groove 31; And keep required pressure and the oil mass of oil film formation hydrodynamic lubrication, thereby keep the required oil mass of bearing stable operation.The sectional shape that unloads oil groove 32 is V-type or U type.The oil groove 31 that holds on the rotor thrust face 34 has a plurality ofly, and is evenly distributed on the rotor thrust face 34 along the circumferential direction of rotor 30, and in the middle of the present embodiment, the oil groove 31 that holds on the rotor thrust face 34 has six.
It is following that the rotor thrust face holds oil groove 31 physical dimension characteristics: flute length L2:15～25mm, groove width w2:15～25mm, groove depth L4:3～4mm; Radius of arc A:R15～R20mm; Circular arc B:R15～R20mm, draining groove depth L3:1～2.5mm, draining groove width w3:1～2.5mm.
Please combine referring to Figure 13 and shown in Figure 14, what mainly illustrate is the view structure of the axial direction of the thrust disc thrust face 35 that cooperates with rear bearing 20.As can be seen from the figure, holding oil groove 31 sectional shape in axial direction is U-shaped, is interior concave circular arc along the sectional shape of the radial direction of rotor 30.Hold oil groove 31 sectional shape in axial direction and also can be ellipse or other shape.
The outward edge that holds oil groove 31 be provided with from hold oil groove 31 extend to thrust disc thrust face 35 outer periphery unload oil groove 32, this unloads oil groove 32 and will hold oil groove 31 and be connected with outside emptying space.Lubricant oil to motor rear bearing 20 lubricated and take away heat after; Under action of centrifugal force, come together in and hold in the oil groove 31; After in holding oil groove 31, accumulating enough lubricant oil, unload oil groove 32 and can regulate, make and hold oil groove 31 and can realize dynamically holding oil the lubricant oil that hold in the oil groove 31; And keep required pressure and the oil mass of oil film formation hydrodynamic lubrication, thereby keep the required oil mass of bearing stable operation.The sectional shape that unloads oil groove 32 is V-type or U type.The oil groove 31 that holds on the thrust disc thrust face 35 has a plurality ofly, and is evenly distributed on the thrust disc thrust face 35 along the circumferential direction of rotor 30, and in the middle of the present embodiment, the oil groove 31 that holds on the thrust disc thrust face 35 has six.
It is following that thrust disc holds oil groove 31 physical dimension characteristics: flute length L5:15～25mm, groove width w4:13～20mm, groove depth L7:1～3mm, circular arc C: R15～R20mm, draining groove depth L6:0.8～2mm, draining groove width w5:1.5～3mm.
Centrifugal compressor is in running; Lubricant oil is when the main fuel feeding runner of fore bearing 10 and rear bearing 20 gets into bearing shell; Be introduced into parallelly connected fuel feeding distributing chute around bearing shell one circle, be distributed to bearing shell radially load-carrying surface and axial load-carrying surface along each parallelly connected fuel feeding uniform flow passage then, after bearing shell is lubricated and taking away heat; Under centrifugal action, come together in and hold in the oil groove 31; Under the adjusting of drain pan 32, hold and keep required pressure and the oil mass of oil film formation hydrodynamic lubrication in the oil groove 31, keep the required oil mass of bearing stable operation.When centrifugal compressor stops suddenly because of power down, be accumulated in lubricant oil in the oil groove 31 and slowly unload and put, to bearing emergency lubrication is provided, make bearing shell be unlikely to the tile kilning phenomenon to occur because temperature is too high, improved the reliability of compressor operating.
According to the embodiment of the utility model, chiller plant comprises above-mentioned centrifugal compressor.
From above description; Can find out; The utility model the above embodiments have realized following technique effect: the motor fore bearing comprises the fore bearing bearing shell locating piece that the fore bearing bearing shell is outer with being set in the fore bearing bearing shell; Fore bearing bearing shell locating piece radially is provided with fore bearing master oil supply gallery; Comprise on the fore bearing bearing shell fore bearing that is connected with fore bearing master oil supply gallery and radially runs through the fore bearing bearing shell radially oil supply gallery be arranged on the radially circumferential oil supply of fore bearing of the exit position of oil supply gallery of fore bearing, fore bearing radially comprises along the fore bearing side direction oil supply gallery that extends laterally and extend to end, fore bearing bearing shell two ends on the oil supply gallery.Because all there is load-carrying surface at the two ends of motor fore bearing, therefore, need on fore bearing, process radially and the two ends oil supply gallery of totally three directions.The oil supply gallery parallel connection of three directions is provided with; Fore bearing radially oil supply gallery is used to satisfy the lubricated needs of the radial load between rotor and the fore bearing, and two fore bearing side direction oil supply galleries then are respectively applied for the lubricated needs that satisfy between fore bearing two ends and the rotor thrust face.In the fore bearing working procedure; Since lubricant oil can be respectively through fore bearing side direction oil supply gallery and fore bearing radially oil supply gallery be lubricated and lower the temperature; Therefore, the lubricant oil that flows to the axial load-carrying surface of fore bearing can be owing to earlier not causing the oil temperature that gets into thrust face too high through getting into the thrust structure behind the axial component again, surpasses the temperature that bush material allows and lost efficacy; Can not influence lubricant oil yet and form dynamic pressure oil film, thereby improve motor rear bearing reliability of operation.Fore bearing first side direction oil supply gallery and the fore bearing second side direction oil supply gallery are obliquely extended to the end of fore bearing bearing shell respectively, and the sectional area of the fore bearing second side direction oil supply gallery is greater than the sectional area of the fore bearing first side direction oil supply gallery.Because the axial force that the bearing shaft that the fore bearing second side direction oil supply gallery is communicated with is born to load-carrying surface is bigger; Therefore; Make the sectional area of the sectional area of the fore bearing second side direction oil supply gallery greater than the fore bearing first side direction oil supply gallery; When lubricant oil carries out the branch timing, can carry out appropriate allocation according to the sectional area of oil supply gallery, thereby guarantee that lubricant oil has better lubricated and cooling-down effect.
The preferred embodiment that the above is merely the utility model is not limited to the utility model, and for a person skilled in the art, the utility model can have various changes and variation.All within the spirit and principle of the utility model, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection domain of the utility model.
Claims (12)
1. motor fore bearing; Comprise fore bearing bearing shell (11) and be set in the outer fore bearing bearing shell locating piece (12) of said fore bearing bearing shell (11); Said fore bearing bearing shell locating piece (12) radially is provided with fore bearing master oil supply gallery (121); It is characterized in that; Comprise on the said fore bearing bearing shell (11) fore bearing that is connected with said fore bearing master oil supply gallery (121) and radially runs through said fore bearing bearing shell (11) radially oil supply gallery (112) be arranged on the radially circumferential oil supply of fore bearing (115) of the exit position of oil supply gallery (112) of said fore bearing, said fore bearing radially comprises that the edge extends laterally and extend to the fore bearing side direction oil supply gallery of said fore bearing bearing shell (11) end, two ends on the oil supply gallery (112).
2. motor fore bearing according to claim 1; It is characterized in that; Said fore bearing radially oil supply gallery (112) is positioned at the middle part of said fore bearing bearing shell (11); Said fore bearing side direction oil supply gallery comprises fore bearing first side direction oil supply gallery (113) and the fore bearing second side direction oil supply gallery (114); The said fore bearing first side direction oil supply gallery (113) extends to the first end end of said fore bearing bearing shell (11), and the said fore bearing second side direction oil supply gallery (114) extends to the second end end of said fore bearing bearing shell (11).
3. motor fore bearing according to claim 2; It is characterized in that; Said fore bearing first side direction oil supply gallery (113) and the said fore bearing second side direction oil supply gallery (114) are along the axial direction horizontal-extending of said fore bearing bearing shell (11), and the sectional area of the said fore bearing second side direction oil supply gallery (114) is greater than the sectional area of the said fore bearing first side direction oil supply gallery (113).
4. motor fore bearing according to claim 2; It is characterized in that; Said fore bearing first side direction oil supply gallery (113) and the said fore bearing second side direction oil supply gallery (114) are obliquely extended to the end of said fore bearing bearing shell (11) respectively, and the sectional area of the said fore bearing second side direction oil supply gallery (114) is greater than the sectional area of the said fore bearing first side direction oil supply gallery (113).
5. motor fore bearing according to claim 4; It is characterized in that; The inwall of said fore bearing bearing shell (11) is provided with the axial oil supply of fore bearing (116) that in axial direction is through to the second end end of said fore bearing bearing shell (11) from the first end end of said fore bearing bearing shell (11); The said fore bearing first side direction oil supply gallery (113) is connected with the axial oil supply of said fore bearing (116) in the first end end of said fore bearing bearing shell (11), and the said fore bearing second side direction oil supply gallery (114) is connected with the axial oil supply of said fore bearing (116) in the second end end of said fore bearing bearing shell (11).
6. motor fore bearing according to claim 5; It is characterized in that; The said fore bearing radially entry position of oil supply gallery (112) is provided with the fore bearing parallel connection fuel feeding distributing chute (111) that is connected with said fore bearing master oil supply gallery (121), and said fore bearing first side direction oil supply gallery (113) and the said fore bearing second side direction oil supply gallery (114) are located and the radially parallelly connected setting of oil supply gallery (112) of said fore bearing at said fore bearing parallel connection fuel feeding distributing chute (111).
7. motor fore bearing according to claim 6; It is characterized in that, the said fore bearing first side direction oil supply gallery (113), the said fore bearing second side direction oil supply gallery (114) and said fore bearing radially the flow area sum of oil supply gallery (112) smaller or equal to the flow area of parallelly connected fuel feeding distributing chute with said fore bearing (111).
8. according to claim 6 or 7 described motor fore bearings; It is characterized in that; Said fore bearing bearing shell (11) comprises radially oil supply gallery (112) of a plurality of said fore bearings, and a plurality of said fore bearings radially circumferential direction of oil supply gallery (112) the said fore bearing bearing shell in edge (11) evenly are provided with.
9. motor fore bearing according to claim 8 is characterized in that, said fore bearing parallel connection fuel feeding distributing chute (111) along the circumferential direction winding on the outer wall of said fore bearing bearing shell (11).
10. according to each described motor fore bearing in the claim 4 to 7; It is characterized in that; The said fore bearing first side direction oil supply gallery (113) comprises and the said fore bearing dispensing section (118) and the extending section (119) that is connected and extends to the first end end of said fore bearing bearing shell (11) with said dispensing section (118) that are connected of oil supply gallery (112) radially that the sectional area of said extending section (119) is greater than the sectional area of said dispensing section (118).
11. a centrifugal compressor comprises the motor fore bearing, it is characterized in that, said motor fore bearing is each described motor fore bearing in the claim 1 to 10.
12. a chiller plant comprises centrifugal compressor, it is characterized in that, said centrifugal compressor is the described centrifugal compressor of claim 11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200249932U CN202402487U (en) | 2012-01-17 | 2012-01-17 | Motor front bearing and centrifugal compressor and refrigeration device comprising same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200249932U CN202402487U (en) | 2012-01-17 | 2012-01-17 | Motor front bearing and centrifugal compressor and refrigeration device comprising same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202402487U true CN202402487U (en) | 2012-08-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200249932U Withdrawn - After Issue CN202402487U (en) | 2012-01-17 | 2012-01-17 | Motor front bearing and centrifugal compressor and refrigeration device comprising same |
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| Country | Link |
|---|---|
| CN (1) | CN202402487U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103206455A (en) * | 2012-01-17 | 2013-07-17 | 珠海格力电器股份有限公司 | Motor front bearing, and centrifugal compressor and refrigeration device comprising motor front bearing |
-
2012
- 2012-01-17 CN CN2012200249932U patent/CN202402487U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103206455A (en) * | 2012-01-17 | 2013-07-17 | 珠海格力电器股份有限公司 | Motor front bearing, and centrifugal compressor and refrigeration device comprising motor front bearing |
| CN103206455B (en) * | 2012-01-17 | 2014-04-16 | 珠海格力电器股份有限公司 | Motor front bearing, and centrifugal compressor and refrigeration device comprising motor front bearing |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120829 Effective date of abandoning: 20140416 |
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| RGAV | Abandon patent right to avoid regrant |