CN206785632U - A kind of horizontal air-conditioned screw compressor - Google Patents

Abstract

The utility model discloses a kind of horizontal air-conditioned screw compressor, including casing, frame, orbiter, fixed scroll, bent axle, rear bearing sheet, bearing block, fuel sucking pipe and blast pipe, the rear of rear bearing sheet includes oil sump, and bearing block is arranged on rear bearing sheet；Bent axle includes axial oil duct, and bearing block includes shoe cream room, and the upper end connection shoe cream room of fuel sucking pipe, lower end is inserted into oil sump；Crankshaft front bearing, rear bearing and crank throw bearing are all sliding bearings, the inner chamber of frame is pressure oil cavity, orbiter includes damping fuel feeding road, and the oil inlet in damping fuel feeding road leads to described pressure oil cavity, and the oil-out in damping fuel feeding road leads to the teeth groove of the scroll wrap of orbiter.The rotational resistance of the utility model not only bent axle is small, and is easy to crankshaft bearing and scroll plate while provides lubrication.

Description

A kind of horizontal air-conditioned screw compressor

[technical field]

It the utility model is related to screw compressor, more particularly to a kind of horizontal air-conditioned screw compressor.

[background technology]

The mode arranged according to main shaft, screw compressor is divided into vertical vortex and horizontal type scroll compressor, horizontal Air-conditioning screw compressor is mainly used in the field of the height limited space such as bus, subway and train.

Application No. CN201110173522.8 patent application discloses a kind of horizontal type scroll compressor, is included in closed Compression mechanism, motor drive mechanism, transmission mechanism, supporting mechanism and the baffle plate contained in container, closed container be provided with air intake duct and Blast pipe, oil supply system are made up of baffle plate, oil pumping device and oil supply gallery.The external diameter of baffle plate is less than closed container internal diameter, is keeping off Annulus is formed between plate external diameter and sealing container internal diameter, baffle plate bottom is provided with oily passage, and baffle plate is fixedly mounted on closed appearance In device on the lower surface of lower support, closed container is divided into motor cavity and shoe cream room by baffle plate.Blast pipe is arranged on closed container By barrier partitions into shoe cream room side middle part, blast pipe is connected with shoe cream room.Before and after the shortcomings that invention, is bent axle Bearing and main shaft crank throw bearing use sliding bearing, and sliding bearing contact surface is big, and rotational resistance is big, and transmission efficiency is low, use Life-span is low, and fault rate is high, is not suitable for the compressor to run at high speed；It is and inconvenient when crankshaft front bearing uses rolling bearing In with scroll plate simultaneously lubrication is provided.

[content of the invention]

The technical problems to be solved in the utility model be to provide a kind of bent axle rotational resistance is small, be easy to crankshaft front bearing and Scroll plate provides the horizontal air-conditioned screw compressor of lubrication simultaneously.

In order to solve the above-mentioned technical problem, the technical solution adopted in the utility model is a kind of horizontal air-conditioned scroll compression Machine, including casing, frame, orbiter, fixed scroll, bent axle, rear bearing sheet, bearing block, fuel sucking pipe and blast pipe, rear support Plate is arranged in the rear portion of casing, and the rear of rear bearing sheet includes oil sump, and bearing block is arranged on rear bearing sheet；Bent axle is included axially Oil duct, the anterior fore bearing by frame of bent axle are supported, and rear portion is supported by the rear bearing in bearing block, and orbiter is by bent axle The crank throw of front end is driven by crank throw bearing；Bearing block includes shoe cream room, and the upper end connection shoe cream room of fuel sucking pipe, lower end is inserted into In oil sump；Fore bearing, rear bearing and crank throw bearing are all sliding bearings, and the inner chamber of frame is pressure oil cavity, and orbiter includes Fuel feeding road is damped, the oil inlet in damping fuel feeding road leads to described pressure oil cavity, and the oil-out in damping fuel feeding road leads to orbiter The teeth groove of scroll wrap.

Above-described horizontal air-conditioned screw compressor, including oil sealing, described bearing block include oil sealing bearing bore, oil sealing Outer ring is arranged in the oil sealing bearing bore of bearing block, and described shoe cream room is located at behind oil seal lip；The rear end of bent axle includes oil Axle journal is sealed, oil sealing axle journal passes through the lip of oil sealing, inserts described shoe cream room.

Above-described horizontal air-conditioned screw compressor, bearing block include body, bearing cap and bonnet, and body includes bearing Bearing bore, the outer ring of rear bearing are fixed in bearing bearing bore, and the inner ring of rear bearing is fixed on the installation axle journal at bent axle rear portion；Bearing Lid is fixed on the rear end of body, and the endoporus of bearing cap is through hole, and through hole includes described oil sealing bearing bore；Bonnet is fixed on bearing cap Rear end, after cover the mounting hole including fuel sucking pipe, mounting hole leads to oil sealing bearing bore.

Above-described horizontal air-conditioned screw compressor, oil resistance device is included between the endoporus and bent axle at frame rear portion, it is bent Turn and coordinated between orbiter drive hole by needle bearing.

Above-described horizontal air-conditioned screw compressor, described oil resistance device is sliding bearing；Crankshaft front bearing is installed In frame inner chamber.

Above-described horizontal air-conditioned screw compressor, the oil inlet in damping fuel feeding road are located at orbiter close to edge On sealing surface；Fixed scroll includes the oil groove connected with the pressure oil cavity on the sealing surface at edge, when crankshaft crank When direction is towards the oil inlet for damping fuel feeding road, described oil inlet connects with described oil groove；When the direction of crankshaft crank is inclined During from the oil inlet for damping fuel feeding road, described oil inlet disconnects with described oil groove.

Above-described horizontal air-conditioned screw compressor, described oil groove include the groove of annular and connected with the groove Oilhole, when crankshaft crank direction towards damping fuel feeding road oil inlet when, described oil inlet connects with described oilhole； When the oil inlet in damping fuel feeding road is deviateed in the direction of crankshaft crank, described oil inlet disconnects with described oilhole, described Groove connects with described pressure oil cavity.

Above-described horizontal air-conditioned screw compressor, the oil-out in the damping fuel feeding road is close to orbiter scroll wrap Inner edge.

Above-described horizontal air-conditioned screw compressor, the oil-out in the damping fuel feeding road with outside orbiter scroll wrap The folded central angle in end is more than 270 °, less than 360 °.

The rotational resistance of the horizontal air-conditioned screw compressor of the utility model not only bent axle is small, transmission efficiency, service life Long, fault rate is low, is suitable for the compressor to run at high speed；And it is easy to crankshaft bearing and scroll plate while lubrication is provided.

[brief description of the drawings]

The utility model is described in further detail with reference to the accompanying drawings and detailed description.

Fig. 1 is the sectional view of the utility model embodiment horizontal type scroll compressor.

Fig. 2 is the partial enlarged drawing at I positions in Fig. 1.

When Fig. 3 is that the direction of the utility model embodiment crankshaft crank damps the oil inlet in fuel feeding road backwards, fuel feeding is damped The structural representation at road position.

When Fig. 4 is the oil inlet in direction direction damping fuel feeding road of the utility model embodiment crankshaft crank, fuel feeding is damped The structural representation at road position.

Fig. 5 is the structure chart of the utility model embodiment fixed scroll.

Fig. 6 is the structure chart of the utility model embodiment orbiter.

[embodiment]

The horizontal air-conditioned screw compressor of the utility model embodiment is as shown in Figures 1 to 6, including casing 1, frame 11, dynamic Scroll plate 3, fixed scroll 4, bent axle 2, crankshaft front bearing 20, crankshaft rear bearing 13, bearing block, oil sealing 12, rear bearing sheet 10, row Tracheae 15, suction line 16 and fuel sucking pipe 5.

Fixed scroll 4 is screwed interior with casing 1 in the front end of frame 11, the central exhaust outlet 401 of fixed scroll 4 Chamber communicates, and this screw compressor is high pressure cavity compressor.Scroll wrap on orbiter 3 and fixed scroll 4 forms scroll compression The working chamber of machine.Cavity between the inner chamber of frame 11, orbiter 3, fixed scroll 4 and bent axle 2 presses shoe cream room D in forming.

Bearing block includes body 6, bearing cap 7 and bonnet 8.

The cavity E at the middle part of casing 1 is connected by the high pressure chest C anterior with casing of exhaust passage 21.Rear bearing sheet 10 is arranged At the rear portion of casing, blast pipe 15 is arranged on the rear of rear bearing sheet 10.

The pressure of inner chamber A in the rear casing of rear bearing sheet 10 is pressure at expulsion, and inner chamber A bottom is oil sump.

The periphery of rear bearing sheet (baffle plate) 10 is weldingly fixed on casing 1, there is oil duct and air flue on rear bearing sheet 10, connection The cavity E and the inner chamber A at the rear of rear bearing sheet 10 at the middle part of casing 1.The body 6 of bearing block is fixed by screws in rear bearing sheet 10 In the endoporus at middle part.

Bent axle 2 it is anterior by frame 11 crankshaft front bearing 20 support, crankshaft front bearing 20 is roller bearing, after Portion is supported by the crankshaft rear bearing 13 in bearing block.

The axial oil duct 205 of bent axle 2 communicates with the end of the crank throw 201 of bent axle 2, the pressure oil that the axial conveying of oil duct 205 comes Lubrication quill bearing 22 first, shoe cream room D is pressed in then flowing into, lubricates crankshaft front bearing 20.Crank throw 201 passes through needle bearing 22 Coordinate with the drive hole of orbiter 13.The sliding bearing 19 installed in the endoporus at the rear portion of frame 11 is as frame 11 and bent axle 2 Between oil resistance device,

Because the inner chamber of frame 11 is closing, the pressure in middle pressure shoe cream room D is big to the axial force of orbiter 3 Axial force in compression chamber gas force to orbiter 3, make the auto-approaching fixed scroll 4 of orbiter 3.

There are damping fuel feeding road 301, the logical middle pressure shoe cream room D of oil inlet 302 in damping fuel feeding road in orbiter 3, damping supplies The oil-out 303 of oil duct leads to the teeth groove of the scroll wrap of orbiter 3.By axial oil duct convey come pressure oil therefrom press oil storage Chamber D abstemiously enters the teeth groove of the scroll wrap of orbiter 3, lubricates orbiter 3 and fixed scroll 4.

Orbiter and fixed scroll 4 are sealed in the part close to edge by sealing surface, with the rotation of bent axle 2, are moved The sealing surface of scroll plate makees revolution translation relative to the sealing surface of fixed scroll 4.

The oil inlet 302 in damping fuel feeding road 301 is located at orbiter 3 on the sealing surface at edge.Fixed scroll 4 is close There are the oil groove connected with middle pressure shoe cream room D, the oil that oil groove includes the groove 402 of annular and connected with groove on the sealing surface at edge Hole 403.The exposed sealing surface of fixed scroll 4 is middle pressure shoe cream room D part, during annular groove 402 is partly exposed to Press in shoe cream room D, the oil inlet passage as oilhole 403.

As shown in figure 4, when the oil inlet 302 in the direction direction damping fuel feeding road 301 of the crank throw 201 of bent axle 2, oil inlet 302 is close with oilhole 403 and be interconnected.Now, the pressure lubrication oil in middle pressure shoe cream room D from annular groove 402 enter with The oilhole 403 of groove connection, then enter damping fuel feeding road 301 from oilhole 403 by oil inlet 302, into damping fuel feeding road 301 Enter the teeth groove of the scroll wrap of scroll plate 3 by oil-out 303, lubricate orbiter 3 and fixed scroll 4.

With the rotation of orbiter 3, when the oil inlet 302 in damping fuel feeding road 301 is left in the direction of the crank throw 201 of bent axle 2 Direction when, oil inlet 302 gradually staggers with oilhole 403, and hereafter oil inlet 302 is fully disconnected with oilhole 403.It is shown in Fig. 3 When the direction of the crank throw 201 of bent axle 2 is backwards to the direction for the oil inlet 302 for damping fuel feeding road 301, oil inlet 302 and oilhole 403 are complete Fully separating situation.

Orbiter 3 often revolves round the sun 1 week, and oil inlet 302 connects 1 time with oilhole 403, and damping fuel feeding road 301 is interval, of short duration Ground can efficiently control the fuel delivery of the working chamber to screw compressor, dynamic and static whirlpool to the working chamber fuel feeding of screw compressor Capstan both can effectively be lubricated, and will not be entered excessive lubricating oil again in the working chamber of screw compressor, effectively be changed The volumetric efficiency of screw compressor has been apt to it, the refrigerating capacity of screw compressor is improved.

The oil-out 303 in fuel feeding road 301 is damped close to the inner edge of the scroll wrap 304 of orbiter 3, as shown in figure 4, working as oil-feed When mouth 302 is interconnected with oilhole 403, the outer rim of the scroll wrap 404 of fixed scroll 4 leaves the interior of the scroll wrap 304 of orbiter 3 Edge, the oil-out 303 to damping fuel feeding road 301 reserve fuel-displaced passage, make lubricating oil enter scroll wrap 404 and rotation tooth 304 it Between, it is lubricated；When the outer rim of scroll wrap 404 is close to the inner edge of the scroll wrap 304 of orbiter 3, scroll wrap 404 will be damped and supplied The oil-out 303 of oil duct 301 is closed, and this structure can provide enough lubrications to being vortexed, while prevent excessive lubricating oil Into vortex mechanism, the heat exchange to air-conditioning system brings negative impact.Damp the oil-out 303 and dynamic vortex in fuel feeding road 301 Central angle corresponding to vortex lines of the outer end head of 3 scroll wrap of disk 304 along scroll wrap 304 is more than 270 °, less than 360 °.Such as Fig. 5 Shown, in the present embodiment, this angle is 360-25=335 °.So, oil-out 303 is located at the center section part of scroll wrap 304 Position, i.e. the middle splenium position of the working chamber of screw compressor, the oil-out in damping fuel feeding road 301 is into teeth groove during fuel feeding, suction muffler It has been closed that, prevent that damping the fuel-displaced of fuel feeding road 301 flows to suction muffler；Meanwhile the oil-out for damping fuel feeding road 301 deviates compressor The high pressure part of structure scroll wrap center portion, prevent the gases at high pressure in compression chamber flow backwards from pressing shoe cream room D in entrance, make vortex mechanism Lubrication failure.

As depicted in figs. 1 and 2, crankshaft rear bearing 13 is ball bearing.The endoporus of body 6 is the bearing of crankshaft rear bearing 13 Bearing bore, the outer ring of crankshaft rear bearing 13 are fixed in the bearing bearing bore of body 6, and the inner ring of crankshaft rear bearing 13 is fixed on bent axle 2 On the bearing installation axle journal 202 at rear portion.

Bearing cap 7 is fixed by screws in the rear end of body 6, and the endoporus of bearing cap 7 is through hole, and the through hole holds for oil sealing Hole, the outer ring of oil sealing 12 are arranged in the oil sealing bearing bore of bearing cap 7

Bonnet 8 is fixed by screws in the rear end of bearing cap 7, there is the mounting hole of fuel sucking pipe 5 on bonnet 8, before mounting hole End communicates with oil sealing bearing bore.Mounting hole on the upper end connection bonnet 8 of fuel sucking pipe 5, lower end is inserted in the oil sump of the bottom of casing 1.

Oil sealing 12 is lip type outside framework oil seal, and shoe cream room B is located at the rear of oil seal lip.The material of the main part of oil sealing 12 For composite high-molecular material, composite high-molecular material can be the composite high-molecular containing poly- four ethene, carbon fibre and graphite Material, not only frictional resistance is small for oil sealing made of this composite high-molecular material containing poly- four ethene, carbon fibre and graphite, And service life is grown.

The rearmost end of bent axle is the oil sealing axle journal 203 coordinated with oil sealing 12, and there is 1 big chamfering the rear end of oil sealing axle journal 203 204, it is easy to axle journal 204 to be inserted into oil sealing.

Shoe cream room B is pressed in forming in space between oil sealing 12 and bonnet 8.The oil sealing axle journal 203 of the rear end of bent axle 2 passes through oil sealing 12 lip, shoe cream room B is pressed in insertion.

It is small using as far as possible small oil sealing axle journal, the diameter of oil sealing axle journal 203 in order to further reduce the rotational resistance of bent axle In the installation axle journal 202 of half bearing.

There is jump-ring slot in the endoporus of bearing cap 7, oil sealing jump ring 9 is arranged in jump-ring slot, and the front end of oil sealing 12 props up oil sealing Jump ring 9, the rear end of oil sealing 12 have bonnet 8 to fix oil sealing 12.

This structure when mounted, first installs bent axle 2 and bearing 13, is then screwed the bearing with oil sealing jump ring 9 Lid 7.Install after bearing cap 7 that ecto-entad installs oil sealing 12 into oil sealing bearing bore again.Because oil sealing axle journal 203 has big chamfering 204 are oriented to, and can successfully install oil sealing, finally fix bonnet 8.

The utility model above example horizontal type scroll compressor frame for pressure oil cavity, conveyed from bent axle axial direction oil duct The pressure oil come also lubricates scroll plate in addition to the bearing of lubrication bent axle by damping fuel feeding road, and scroll plate can both obtain effectively Lubrication, excessive lubricating oil will not be entered again in the working chamber of screw compressor, effectively improve the appearance of screw compressor Product efficiency, the refrigerating capacity of screw compressor are improved.

The utility model above example horizontal type scroll compressor bearing related to bent axle all uses rolling bearing, bent axle The rotational resistance of the shoe cream room oil sealing sealing at rear portion oil-feed position, rolling bearing and oil sealing is small, transmission efficiency, service life Long, fault rate is low, and the utility model above example is suitable for the compressor to run at high speed.

Claims (7)

1. a kind of horizontal air-conditioned screw compressor, including casing, frame, orbiter, fixed scroll, bent axle, rear bearing sheet, axle Bearing, fuel sucking pipe and blast pipe, rear bearing sheet are arranged in the rear portion of casing, and the rear of rear bearing sheet includes oil sump, bearing block peace On rear bearing sheet；Bent axle includes axial oil duct, and the anterior fore bearing by frame of bent axle supports, and rear portion is by bearing block The supporting of rear bearing, orbiter driven by the crank throw of crankshaft front end by crank throw bearing；Bearing block includes shoe cream room, fuel sucking pipe Upper end connection shoe cream room, lower end is inserted into oil sump, it is characterised in that fore bearing, rear bearing and crank throw bearing are all to slide Bearing, the inner chamber of frame is pressure oil cavity, and orbiter includes damping fuel feeding road, and the oil inlet in damping fuel feeding road leads to described pressure Power oil pocket, the oil-out in damping fuel feeding road lead to the teeth groove of the scroll wrap of orbiter；The oil-out in the damping fuel feeding road is close The inner edge of orbiter scroll wrap, it is more than 270 ° with the central angle folded by orbiter scroll wrap outer end, less than 360 °.

2. horizontal air-conditioned screw compressor according to claim 1, including oil sealing, described bearing block are held including oil sealing Hole, the outer ring of oil sealing are arranged in the oil sealing bearing bore of bearing block, and described shoe cream room is located at behind oil seal lip；After bent axle End includes oil sealing axle journal, and oil sealing axle journal passes through the lip of oil sealing, inserts described shoe cream room.

3. horizontal air-conditioned screw compressor according to claim 2, it is characterised in that bearing block includes body, bearing cap And bonnet, body include bearing hole, the outer ring of rear bearing is fixed in bearing hole, and the inner ring of rear bearing is fixed on bent axle rear portion Install on axle journal；Bearing cap is fixed on the rear end of body, and the endoporus of bearing cap is through hole, and through hole includes described oil sealing bearing bore； Bonnet is fixed on the rear end of bearing cap, after cover the mounting hole including fuel sucking pipe, mounting hole leads to oil sealing bearing bore.

4. horizontal air-conditioned screw compressor according to claim 1, it is characterised in that the endoporus and bent axle at frame rear portion it Between include oil resistance device, coordinated between crank throw and orbiter drive hole by needle bearing.

5. horizontal air-conditioned screw compressor according to claim 4, it is characterised in that described oil resistance device is sliding axle Hold；Crankshaft front bearing is arranged in frame inner chamber.

6. horizontal air-conditioned screw compressor according to claim 1, it is characterised in that the oil inlet in damping fuel feeding road is located at Orbiter is on the sealing surface at edge；Fixed scroll includes what is connected with the pressure oil cavity on the sealing surface at edge Oil groove, when the direction of crankshaft crank is towards the oil inlet for damping fuel feeding road, described oil inlet connects with described oil groove；When When the oil inlet in damping fuel feeding road is deviateed in the direction of crankshaft crank, described oil inlet disconnects with described oil groove.

7. horizontal air-conditioned screw compressor according to claim 6, it is characterised in that described oil groove includes the recessed of annular Groove and the oilhole connected with the groove, when the direction of crankshaft crank is towards the oil inlet for damping fuel feeding road, described oil-feed Mouth connects with described oilhole；When the oil inlet in damping fuel feeding road is deviateed in the direction of crankshaft crank, described oil inlet and institute The oilhole stated disconnects, and described groove connects with described pressure oil cavity.