CN206071876U - A kind of crankshaft oilway structure and the bent axle with which and compressor - Google Patents

Abstract

This utility model provides a kind of crankshaft oilway structure and the bent axle with which and compressor, the bent axle head (12) that the bent axle (1) connects including crank spindle (11) and with the crank spindle, the oilhole (2) of the axis direction extension along the bent axle is internally provided with the crank spindle (11), and radially radial direction oil outlet (3) is offered along bent axle inside the bent axle head, one end of the radial direction oil outlet (3) is communicated to the oilhole (2), the other end is opened on the outer radial periphery wall of the bent axle head (12), make oil flow out the bent axle (1).Oil can be discharged along the outer radial periphery face of bent axle head by the radial direction oil outlet by this utility model, restriction loss of the bearing clearance to oil can be reduced, the kinetic equation loss of fuel feeding is reduced；Can also reduce or destroy the high-pressure area of the upper zone line in oil film axial direction so that the pressure of the oil film connected with bearing is reduced and evenly, reduces resistance to sliding of the bearing in rotary course.

Description

A kind of crankshaft oilway structure and the bent axle with which and compressor

Technical field

This utility model belongs to Compressor Technology field, and in particular to a kind of crankshaft oilway structure and the bent axle with which and Compressor.

Background technology

The pump housing and bearing of screw compressor is operationally required for lubricating oil to lubricate at present, to maintain the excellent of compressor Benign energy.Due to action of gravity, the lubricating oil of compressor is all accumulated in the bottom of whole machine, so commonly setting inside bent axle Meter oilhole, is lubricated so as to lubricating oil is drawn onto at the pump housing and bearing.Three bearings, its middle and upper part are set screw compressor more The base bearing of eccentric part bearing and centre bears that load ratio is larger, and the caloric value of bearing is big, if fuel feeding is insufficient, easily causes axle Damage is held, so the oil circuit design and oil mass distribution of shafting become the design difficulty and emphasis of each producer.

Figure below is the bent axle oil supplying hole of two kinds of structure screw compressors and path, fuel feeding aperture and the bottom phase of bent axle head Together, most of fuel feeding is required for after upper bearing throttles, and could enter back pressure oil sump, and the oil of back pressure oil sump is through oil return Pipe, is back to compressor oil bottom of pond portion.If the fuel delivery demand of compressor is big, restriction loss of the upper bearing to oil is big.Together If when compressor discharge capacity than larger, the shafting component of compressor is heavier, brings the heaviness of the whole machine of compressor.

As compressor of the prior art is present, bearing restriction loss is big, and bent axle weight is big, whole machine is heavy, crankshaft length Greatly, it is unfavorable for the technical problem such as clamping and center oilhole processing, therefore this utility model research design goes out a kind of crankshaft oilway knot Structure and the bent axle with which and compressor.

Utility model content

Therefore, the technical problems to be solved in the utility model is to overcome compressor of the prior art to there is bearing throttling The big defect of loss, so as to provide a kind of crankshaft oilway structure and the bent axle with which and compressor.

This utility model provides a kind of crankshaft oilway structure, wherein the bent axle include crank spindle and with the bent axle master The bent axle head that axle connects, the crank spindle be internally provided with along the bent axle axis direction extend oilhole, and Radial direction oil outlet is offered radially along bent axle inside the bent axle head, one end of the radial direction oil outlet is communicated to the oil Hole, the other end are opened on the outer radial periphery wall of the bent axle head, make oil flow out the bent axle.

Preferably, also offer axial oil outlet inside the bent axle head vertically, the one of the axial oil outlet End is communicated to the oilhole, and the other end is opened in the free end of the bent axle head, so that oil is from axially flowing out the song Axle.

Preferably, the radial direction oil outlet be more than one, and the more than one radial direction oil outlet perpendicular to oil Cross-sectional area perpendicular to oily flow direction of the cross-sectional area sum of flow direction more than the axial oil outlet.

Preferably, the cross-sectional area sum perpendicular to oily flow direction of the more than one radial direction oil outlet is more than institute State axial oil outlet 1.5 times of the cross-sectional area perpendicular to oily flow direction.

Preferably, the radial direction oil outlet is opened near the crank spindle or the position connected with the crank spindle Place, and/or, the radial direction oil outlet be opened at the maximum eccentric for excluding the bent axle head beyond position.

Preferably, also opened up in the way of the axis around the bent axle on the outer radial periphery surface of the bent axle head There is oil groove, one end of the oil groove is connected with the other end of the radial direction oil outlet.

Preferably, the oil groove is the spiral type extended around the cannelure of the axis or along the axis direction Groove.

Preferably, the oil groove opens up the position beyond being arranged at the maximum eccentric for excluding the bent axle head.

Preferably, the oilhole be arranged on the crank spindle, and described bent axle head the same side position, it is and described It is tangent between the centrage of oilhole and the bent axle.

This utility model also provides a kind of bent axle, and which includes bent axle head, crank spindle and Oil Guide portion, the crank spindle One end connect with the bent axle head, the other end is connected with the Oil Guide portion, and also include aforesaid crankshaft oilway structure.

Preferably, the bent axle head and the crank spindle, and/or the crank spindle and the Oil Guide portion, adopt Split type structure is made and is assembled and is integrated.

Preferably, the position for engaging between the split type structure is provided with prevents circumferential turn relatively of the two generation Dynamic circumferential chocking construction.

This utility model also provides a kind of compressor, and which includes aforesaid bent axle.

A kind of crankshaft oilway structure and the bent axle with which of this utility model offer and compressor have following beneficial effect Really：

1. crankshaft oilway structure of the present utility model and the bent axle with which and compressor, by the bent axle head Portion is radially offered radial direction oil outlet and causes oil that the version of bent axle is flowed out by which, can be radially fuel-displaced by this by oil Hole is discharged along the outer radial periphery face of bent axle head, can reduce restriction loss of the bearing clearance to oil, so as to reduce fuel feeding Kinetic equation loss；

2. crankshaft oilway structure of the present utility model and the bent axle with which and compressor, by the edge inside the bent axle head The mode of radial direction oil outlet is offered radially, additionally it is possible to reduce or destroy the high-pressure area of the upper zone line in oil film axial direction so that The pressure of the oil film connected with bearing is reduced and evenly, effectively reduces resistance to sliding of the bearing in rotary course；

3. crankshaft oilway structure of the present utility model and the bent axle with which and compressor, by axial oil outlet is set with And cause the cross-sectional area sum of radial direction oil outlet more than axial oil outlet cross-sectional area, can effectively cause what is flowed out vertically Oil mass is less than the oil mass for radially flowing out such that it is able to further reduce the flow losses of bearing, further reduces the section of bearing Stream loss；

4. crankshaft oilway structure of the present utility model and the bent axle with which and compressor, by the radial direction in bent axle head Oil groove is further opened with the way of the axis around the bent axle on outer surface and makes the side which is connected with radial direction oil outlet Formula, can avoid radial direction oil hole from affecting the lubrication ring effect of bearing, strengthen the lubricant effect to bent axle head outer peripheral face, moreover it is possible to make The oil film for obtaining bearing is evenly distributed, so as to improve the reliability of bearing；

5. crankshaft oilway structure of the present utility model and the bent axle with which and compressor, by oilhole is arranged on bent axle In the eccentric part side of main shaft, and the version that makes oilhole and crankshaft axis tangent, enable to crankshaft oil hole and also can Among participating in counter weight, can effectively reduce weight mass and shafting gross mass, reduce the loss produced by bent axle rotation, Efficiently solve the problem that compressor crank shaft weight is big, whole machine is heavy；

6. bent axle of the present utility model and the compressor with which, by bent axle using stagewise by way of processing and manufacturing And assemble, the processing of bent axle and the processing of clamping and center oilhole can be conducive to, machining accuracy is improved, while reducing criticizing Amount production cost.

Description of the drawings

Fig. 1 is the complete machine structure schematic diagram of traditional screw compressor in prior art；

Fig. 2 is the dimensional structure diagram of bent axle of the present utility model；

Fig. 3 is the cross-sectional view along its axis direction of the bent axle of Fig. 2；

Fig. 4 is the dimensional structure diagram of the bent axle head portion of the bent axle of Fig. 2；

Fig. 5 is the top view of the bent axle head of the bent axle of Fig. 4；

Fig. 6 is the oil film pressure distribution figure between the bent axle head of traditional screw compressor and Moving plate bearing；

Fig. 7 is the oil film pressure distribution figure between the bent axle head of compressor of the present utility model and Moving plate bearing；

Fig. 8 is that the crank spindle of split-type structural bent axle of the present utility model is illustrated with the respective cross-section structure in Oil Guide portion Figure.

In figure, reference is expressed as：

1-bent axle, 11-crank spindle, 12-bent axle head (or claiming eccentric part), 13-Oil Guide portion, 131-oil guiding hole, 2-oilhole, 3-radial direction oil outlet, 4-axial oil outlet, 5-oil groove, 6-crankshaft axis (i.e. crankshaft center line), 7-bent axle Eccentric part center, 8-trimming, 9-projection, 10-head axial centerline.

Specific embodiment

As illustrated in figs. 2 through 8, this utility model provides a kind of crankshaft oilway structure, wherein the bent axle 1 includes crank spindle 11 and the bent axle head 12 that connects with the crank spindle 11, the axle along the bent axle is internally provided with the crank spindle 11 The oilhole 2 that line direction extends, and radial direction oil outlet 3, the radial direction oil outlet 3 are radially inside offered in the bent axle head One end be communicated to the oilhole 2, the other end is opened on the outer radial periphery wall of the bent axle head 12, make described in oil can flow out Bent axle 1.

1. crankshaft oilway structure of the present utility model, radially fuel-displaced by radially inside offering in the bent axle head Hole causes oil that the version of bent axle is flowed out by which, can be outside along the footpath of bent axle head by the radial direction oil outlet by oil Side face is discharged, and the interval after effectively reducing being flowed out by axially oil outlet again between bent axle head periphery wall and bent axle stays Oil mass, due to the gap very little of bent axle and bearing, generally only several, so the distance that oil is flowed vertically in the interval Shorter, its fluid resistance loss is less, it is possible to restriction loss of the bearing clearance to oil is effectively reduced, so as to reduce supplying The kinetic equation loss of oil；

2. crankshaft oilway structure of the present utility model, by radially inside offering radial direction oil outlet in bent axle head Mode, additionally it is possible to reduce or destroy the high-pressure area of the upper zone line in oil film axial direction so that the pressure of the oil film connected with bearing Reduce and evenly, effectively reduce resistance to sliding of the bearing in rotary course, as shown in fig. 6-7.

Preferably, axial oil outlet 4, the axial oil outlet 4 are also offered inside the bent axle head 12 vertically One end be communicated to the oilhole 2, the other end is opened in the free end of the bent axle head 12, with from axially causing oil to flow out The bent axle 1.By axially inside opening up axial oil outlet in bent axle head and enabling the oil in oilhole along the Axial-running Out Oilhole axially flows out the version of bent axle, enables to the top that oil can flow to bent axle head along the axial direction of bent axle (being its free end, see Fig. 3), so as to realize Axial-running Out stream, to lubricate the structures such as connecting rod, cylinder.

Preferably, the radial direction oil outlet 3 be more than one, and the more than one radial direction oil outlet 3 perpendicular to Cross-sectional area perpendicular to oily flow direction of the cross-sectional area sum of oily flow direction more than the axial oil outlet 4.Pass through Axial oil outlet is set and the cross-sectional area sum of radial direction oil outlet is caused more than axial oil outlet cross-sectional area, can be effective So that the oil mass for flowing out vertically is less than the oil mass for radially flowing out such that it is able to further reduce the flow losses of bearing, enter One step reduces the restriction loss of bearing.

For example：When radial direction oil outlet 3 is 1, the cross-sectional area perpendicular to oily flow direction of the radial direction oil outlet 3 More than the cross-sectional area perpendicular to oily flow direction of the axial oil outlet 4.The radial direction oil outlet of bent axle head and Axial-running Out Oilhole can adopt identical tool sharpening, realize the control of different fuel-displaced hole areas, and the embodiment is easy to processing, but exists Multiple tracks assembly technology, there is also the trend of production cost increase.

Preferably, the cross-sectional area sum perpendicular to oily flow direction of the more than one radial direction oil outlet 3 is more than 1.5 times of the cross-sectional area perpendicular to oily flow direction of the axial oil outlet 4.This is radial direction oil outlet and axial oil outlet Between preferred size relation, further preferably reduce into the oil mass in axial oilhole, effectively ensure and reduce The flow losses of bearing.

Preferably, the radial direction oil outlet 3 be opened in axially move closer to the crank spindle 11 or with the crank spindle At 11 positions for connecting, and/or, beyond the radial direction oil outlet 3 is opened at the maximum eccentric for excluding the bent axle head 12 Position.Radial direction oil outlet is opened in axially move closer to the crank spindle or with the crank spindle at the position for connecting, The oil circuit that oil circuit rises vertically can be reduced most possibly, made with reducing the resistance for rising, reduction energy consumption, and maximum efficiency It is oily can discharge from radial direction oil outlet, reduce from axial oil outlet the oil mass for flowing out to greatest extent, and then to greatest extent Oily restriction loss is reduced, reducing the kinetic equation loss of fuel feeding；Radial direction oil outlet is opened in the maximum for excluding the bent axle Position beyond eccentric part, because belonging to bearing capacity maximum at maximum eccentric, it is impossible to affect oil film herein, so can be effective Prevent radial direction oil hole be opened in herein and destroy minimum oil film thickness (oil film thickness be formed at bent axle head and bearing it Between), so as to affect the bearing capacity of bearing.

Preferably, also opened in the way of the axis around the bent axle on the outer radial periphery surface of the bent axle head 12 Oil groove 5 is provided with, one end of the oil groove 5 is connected with the other end of the radial direction oil outlet 3.By in bent axle head In the way of the axis around the bent axle it is further opened with oil groove and makes which be connected with radial direction oil outlet on outer radial periphery surface Mode, radial direction oil hole can be avoided to affect the lubricant effect of bearing, additionally it is possible to from reducing or destroy oil film axially upper zone line High-pressure area so that the pressure of the oil film connected with bearing is reduced and evenly, effectively reduces bearing in rotary course Resistance to sliding, strengthens the lubricant effect to bent axle head outer peripheral face, moreover it is possible to so that the oil film of bearing is evenly distributed, so as to improve The reliability of bearing.

Preferably, the oil groove 5 is the spiral type extended around the cannelure of the axis or along the axis direction Groove.This is two kinds of preferred versions of oil groove of the present utility model, realizes Oil Guide, the effect of oil transportation and plays the work of lubrication With.

Preferably, the oil groove 5 is less than 180 ° around the anglec of rotation of the axis, while avoiding being arranged in maximum eccentric Place.Oil groove is inclined also for the maximum for preventing from for the oil groove being arranged in bent axle less than 180 ° around the anglec of rotation of the axis At heart position, and the oil film thickness (oil film thickness is formed between bent axle head and bearing) for preventing its destruction minimum, so as to shadow Ring the bearing capacity of bearing.

Preferably, the oilhole 2 is arranged in the side of the eccentric part of the crank spindle 11 (i.e. in bent axle head Vertically be connected between axis and crank spindle in line and the plane perpendicular to axis of crank spindle exist diameter with The vertical join line is perpendicular, and the diameter extends so as to crank spindle is separated into two parts along crank spindle axis direction, The oilhole just be located at crank spindle near eccentric part (i.e. bent axle head) side part), and the oilhole 2 with it is described It is tangent between the centrage of bent axle.By being arranged on oilhole in the eccentric part side of crank spindle, and make oilhole and bent axle The tangent version of centrage, enables among crankshaft oil hole also can participate in counter weight, can effectively reduce counterweight Quality and shafting gross mass, reduce the loss produced by bent axle rotation, efficiently solve that compressor crank shaft weight is big, whole machine is stupid The problem of weight.

This utility model also provides a kind of bent axle, and which includes bent axle head 12, crank spindle 11 and Oil Guide portion 13, the song One end of axle main shaft is connected with the bent axle head, the other end is connected with the Oil Guide portion 13, and also includes aforesaid bent axle oil Line structure.

1. bent axle of the present utility model, due to comprising aforesaid crankshaft oilway structure, by inside the bent axle head Radially offering radial direction oil outlet causes oil that the version of bent axle is flowed out by which, oil can be passed through the radial direction oil outlet Outer radial periphery face along bent axle head is discharged, again along bent axle head periphery wall after effectively reducing being flowed out by axially oil outlet The oil mass that interval between bent axle stays, due to the gap very little of bent axle and bearing, generally only several, so oil is at this The distance for being flowed every place vertically is shorter, and its fluid resistance loss is less, it is possible to reducing throttling of the bearing clearance to oil Loss, so as to reduce the kinetic equation loss of fuel feeding；

2. bent axle of the present utility model, due to comprising aforesaid crankshaft oilway structure, by inside bent axle head along footpath To the mode for offering radial direction oil outlet, additionally it is possible to reduce or destroy the high-pressure area of the upper zone line in oil film axial direction so that with The pressure of the oil film that bearing connects reduces and evenly, effectively reduces resistance to sliding of the bearing in rotary course.

As shown in Figure 8, it is preferable that the bent axle head is led with described with the crank spindle, and/or the crank spindle Oily portion, is made and is assembled using split type structure and be integrated.By bent axle is using processing and manufacturing by way of stagewise and fills Match somebody with somebody, the processing of bent axle and the processing of clamping and center oilhole can be conducive to, improve machining accuracy, while it is raw to reduce batch Produce cost.

Bent axle head and crank spindle and Oil Guide portion can also adopt the structure of integral molding, discharge capacity is big, bent axle is long It is in the long compressor arrangement of degree, higher to equipment requirements, but integral structure is by clamped one time, can preferably ensure each Partial element precision.

Preferably, the position for engaging between the split type structure is provided with prevents circumferential turn relatively of the two generation Dynamic circumferential chocking construction.By way of the position engaged between split type structure arranges circumferential chocking construction, energy The skidding or mistake being enough effectively prevented in bent axle rotary course turns.

Circumferential chocking construction is specially the structure that slight interference amount and trimming structure are engaged, as shown in figure 8, circumferential stop knot Structure includes being arranged on the trimming 8 at 11 lower end radial outer wall of crank spindle, in upper end radially inner side and the trimming 8 pairs in Oil Guide portion 13 Answer so that when Oil Guide portion is sheathed on the radial outer periphery of crank spindle lower end, by projection 9 and trimming 8 Combination (fit system of similar keyway and key) can effectively limit the relative of the circumference between crank spindle and Oil Guide portion Rotate, synchronous rotary cannot be ensured so as to skidding occurring between serving in bent axle work rotary course or losing The occurrence of.

Preferably, the Oil Guide portion 13 has been concentrically disposed with oil guiding hole 131, and the oil guiding hole with the crank spindle 11 131 are communicated with the oilhole 2.

This utility model also provides a kind of compressor, and which includes aforesaid bent axle.It is further preferred that the compressor is Scroll compressor.

1. compressor of the present utility model, due to comprising aforesaid bent axle, by the bent axle head radially inside Offering radial direction oil outlet causes oil that the version of bent axle is flowed out by which, oil can be passed through the radial direction oil outlet along song The outer radial periphery face of shaft head is discharged, again along bent axle head periphery wall and bent axle after effectively reducing being flowed out by axially oil outlet Between the oil mass that stays of interval, due to the gap very little of bent axle and bearing, generally only several, so oil is on the interval edge Axially the distance of flowing is shorter, and its fluid resistance loss is less, it is possible to restriction loss of the bearing clearance to oil is reduced, from And reduce the kinetic equation loss of fuel feeding；

2. compressor of the present utility model, due to comprising aforesaid bent axle, by radially inside opening up in bent axle head There is the mode of radial direction oil outlet, additionally it is possible to reduce or destroy the high-pressure area of the upper zone line in oil film axial direction so that with bearing phase The pressure of the oil film for connecing reduces and evenly, effectively reduces resistance to sliding of the bearing in rotary course.

Operation principle of the present utility model and preferred embodiment is described below

This utility model is by following technological means：

1st, in the downside of bent axle head, increase radial direction oil supply gallery, reduce axial oil outlet aisle spare, i.e. head footpath To fuel feeding hole area more than axial area of orifice, the oil discharge passage of more than 2 is formed；

2nd, counterweight and split type structure design are participated in by crankshaft oil hole；

The 3rd, helical oil groove is set on the outside of bent axle head, and one end is connected with the outside of radially oil supplying hole, and the other end prolongs upwards Stretch.

Solve following technical problem：

1st, the big problem of bearing restriction loss that huge discharge scroll compression machine crankshaft fuel delivery is big, bring；

2nd, the weight of huge discharge compressor crank shaft is big, and the whole machine for bringing is heavy；

3rd, crankshaft length is big, is unfavorable for clamping and center oilhole processing.

Beneficial effect：

1st, bent axle head radial direction oil circuit distribution system, can reduce restriction loss of the bearing clearance to oil, reduce fuel feeding Kinetic equation loss；

2nd, split type bent axle new construction, the processing and clamping beneficial to bent axle improve machining accuracy, while reducing batch production Cost；

3rd, counterweight is participated in by crankshaft oil hole, is conducive to reducing weight mass and shafting gross mass.

Specific embodiment：

As shown in figure 1, compressor is in operation process, the oil piping system in traditional screw compressor is to compress motor spindle Oil in oil sump passes through fuel sucking pipe and oil guide piece, into the oil inside offering hole of bent axle, as bent axle oil supplying hole is eccentric structure, energy Centrifugal force is enough produced, enables the oil in oil supplying hole smoothly to rise to bent axle head, after oil is by axial oil outlet, lubrication Moving plate Bearing, inflow back pressure oil sump, then make oil be back to compression motor spindle oil sump by oil return pipe, form an oil circulation.

The crankshaft oilway structure of this utility model screw compressor, rises to bent axle head 12 by the oil of oilhole 2, in head The oil circuit in portion is divided into two-way or mulitpath, and the area of radial path is more than area of orifice axially upwards, i.e. radial direction oil outlet 3 Area more than axial oil outlet 4 area so that most oil is flowed out by radial direction oil hole 3, the throttling of reduction bearing Loss；

The radial direction oil outlet 3 of this utility model oil channel structures, the oilhole 2 are located at the middle and lower part of bent axle head 12 and (reduce oil The resistance of rising, while after the oil of radial direction oil hole flows out, the axial distance for down flowing through bearing inner wall is little), i.e., axial position Put in the lower section of center line 10 (center line of bent axle head axial distance)；Traditional bearing film parabolic pressure the distribution of line shape feature (intermediate pressure is big, pressure at two ends is little), as shown in Figure 6；Radial direction oil-out is set in bent axle head 12, as shown in fig. 7, can drop The high-pressure area of low or destruction zone line, makes the pressure of bearing evenly, reduces resistance to sliding in rotary course.It is same to reach Sample reduces the purpose of central part oil film pressure, and radial direction oil outlet can arrange multiple, but need to avoid eccentric maximum, prevents destruction Minimum oil film thickness, so as to affect the bearing capacity of bearing.

Radial direction oil outlet 3 can be 2 or 3 diverse locations radial direction oil outlet, but radial direction oil outlet area and need More than more than 1.5 times of Axial-running Out area of orifice, the aperture area of axial oil outlet 4 reduces, and increases resistance upwards, reduces from axle To the fuel delivery of oil outlet 4, so as to reduce the flowing and slippage loss of bearing.

To avoid radial direction oil hole from affecting the slip ring effect of bearing, by arranging ring-like oil groove 5, the rotation of groove in crankshaft surface Angle is less than 180 °, while avoiding being arranged at maximum eccentric, one end of endless oil groove 5 is connected with radial direction oil outlet 3, makes bearing Oil film be evenly distributed, so as to improve the reliability of bearing, due to the setting of annular oil groove so that the pressure distribution of oil film has Disconnect, so indirectly reducing the pressure of maximum oil film；It is the population structure of oil circuit, each oil circuit part described further below above Feature.

The eccentric oilhole 2 of bent axle not only acts as offer centrifugal force, enables to rise to bent axle head by the oil of oil guide piece 12, and as oilhole 2 is arranged off-centre, the barycenter of bent axle is had an impact, so maximum of this utility model eccentric oilhole 2 Aperture accomplishes tangent with crankshaft axis 6, and is all located at eccentric side, can make the barycenter of bent axle to greatest extent to Moving plate phase Anti- direction movement, can thus reduce the quality of main balance weight, damage so as to reducing shafting gross mass, reducing bent axle rotation The effect of consumption, by the area for increasing oil supplying hole 2, on the one hand reduces fuel feeding resistance, and another side makes oil supplying hole be all located at eccentric part Place side, as shown in figure 5, the side of centrage 6 is all located at, near the center 7 of eccentric part.

Huge discharge screw compressor necessarily using the bent axle that quality is heavier, can overcome huge discharge compressor using the program Heaviness shortcoming.To realize the processing of big oilhole 2, split-type structural design, oil guide piece mating part can be carried out to bent axle 1 Split is carried out, as shown in Figure 8；As countershaft holding capacity is little, Split type structure nor affects on the reliability of the intensity of bent axle and whole machine. After split-type structural, the oilhole 2 of bent axle belongs to through-hole structure, is easy to disposable processing and clamping, is conducive to improving processing Precision and reduction production cost.Wherein split type bent axle adopts slight interference amount+trimming respective outer side edges, trimming 8 and projection 9 such as Fig. 8 It is shown, prevent from the skidding in bent axle rotary course or lose turning.

Split type crankshaft structure, it would however also be possible to employ integral structure, discharge capacity is big, crankshaft length length compressor arrangement In, it is higher to equipment requirements, but integral structure can preferably ensure the element precision of each several part by clamped one time.

The radial direction oil outlet of bent axle head and axial oil outlet adopt identical tool sharpening, then again by being pressed into undergauge Pipe (equivalent to one minor diameter pipe of press-in), realizes the control of different fuel-displaced hole areas.The embodiment is easy to processing, but exists Multiple tracks assembly technology, there is also the trend of production cost increase.

Those skilled in the art is it is easily understood that on the premise of not conflicting, above-mentioned each advantageous manner can be free Ground combination, superposition.

Preferred embodiment of the present utility model is the foregoing is only, it is not to limit this utility model, all at this Any modification, equivalent and improvement made within the spirit and principle of utility model etc., should be included in this utility model Protection domain within.The above is only preferred implementation of the present utility model, it is noted that for the art For those of ordinary skill, on the premise of without departing from this utility model know-why, some improvement and modification can also be made, These improve and modification also should be regarded as protection domain of the present utility model.

Claims (13)

1. a kind of crankshaft oilway structure, it is characterised in that：The bent axle (1) including crank spindle (11) and with the crank spindle The bent axle head (12) for connecting, is internally provided with the oilhole of the axis direction extension along the bent axle in the crank spindle (11) (2) radial direction oil outlet (3), one end of the radial direction oil outlet (3) are offered radially along bent axle, and inside the bent axle head The oilhole (2) is communicated to, the other end is opened on the outer radial periphery wall of the bent axle head (12), makes oil flow out the song Axle (1).

2. crankshaft oilway structure according to claim 1, it is characterised in that：It is internal also along axle in the bent axle head (12) To axial oil outlet (4) is offered, one end of the axial oil outlet (4) is communicated to the oilhole (2), and the other end is opened in institute State the free end of bent axle head (12), so that oil is from axially flowing out the bent axle (1).

3. crankshaft oilway structure according to claim 2, it is characterised in that：The radial direction oil outlet (3) is more than one, And the cross-sectional area sum perpendicular to oily flow direction of the more than one radial direction oil outlet (3) is fuel-displaced more than the axial direction The cross-sectional area perpendicular to oily flow direction in hole (4).

4. crankshaft oilway structure according to claim 3, it is characterised in that：The more than one radial direction oil outlet (3) The cross-sectional area sum perpendicular to oily flow direction more than the axial oil outlet (4) perpendicular to the transversal of oily flow direction 1.5 times of area.

5. the crankshaft oilway structure according to one of claim 1-4, it is characterised in that：The radial direction oil outlet (3) opens up At the position connected near the crank spindle (11) or with the crank spindle (11), and/or, the radial direction oil outlet (3) position being opened in beyond excluding at the maximum eccentric of the bent axle head (12).

6. the crankshaft oilway structure according to one of claim 1-4, it is characterised in that：In the footpath of the bent axle head (12) Be further opened with oil groove (5) in the way of the axis around the bent axle on outer surface, one end of the oil groove (5) with it is described The other end of radial direction oil outlet (3) is connected.

7. crankshaft oilway structure according to claim 6, it is characterised in that：The oil groove (5) is around the axis Cannelure or the spiral slot extended along the axis direction.

8. crankshaft oilway structure according to claim 6, it is characterised in that：The oil groove (5) opens up and is arranged in exclusion institute Position beyond stating at the maximum eccentric of bent axle head.

9. the crankshaft oilway structure according to claim 1-4, described in one of 7-8, it is characterised in that：The oilhole (2) is arranged at On the crank spindle (11), and described bent axle head the same side position, and the centrage of the oilhole (2) and the bent axle Between it is tangent.

10. a kind of bent axle, it is characterised in that：Including bent axle head (12), crank spindle (11) and Oil Guide portion (13), the bent axle One end of main shaft is connected with the bent axle head, the other end is connected with the Oil Guide portion (13), and also include claim 1-9 it Crankshaft oilway structure described in one.

11. bent axles according to claim 10, it is characterised in that：The bent axle head and the crank spindle, and/or institute Crank spindle and the Oil Guide portion are stated, is made and is assembled using split type structure and be integrated.

12. bent axles according to claim 11, it is characterised in that：The position engaged between the split type structure Being provided with prevents the two from the relative circumferential chocking construction for circumferentially rotating occurring.

A kind of 13. compressors, it is characterised in that：Including the bent axle described in one of claim 10-12.