CN2132848Y - Swirl fluid machinery - Google Patents

Abstract

The utility model relates to swirl type fluid machinery which comprises a closure casing and two static swirl disks in the closure casing, wherein, a moving swirl disk is arranged between the two static swirl disks, and three bent shafts are arranged on the swirl disks. The three bent shafts are mashed with a main shaft through gears. The utility model has the characteristics of few abrasion, no overturning moment, lightened vibration, low noise, steady and reliable running, etc.

Description

Swirl fluid machinery

The utility model relates to a kind of fluid machinery, particularly a kind of convolute-hydrodynamic mechanics.

The main member of convolute-hydrodynamic mechanics is two screw type scroll, be referred to as fixed scroll and moving scroll respectively, constitute by try to get to the heart of a matter seat board and screw type tooth of whirlpool respectively, relative angle when they are installed is 180 degree, both are meshing with each other on several points and form a series of enclosed volumes, moving scroll is driven by the crank mechanism of a band throw of eccentric, the on-stream curved surface along vortex of point of contact between two scroll moves, thereby formed enclosed volume is changed, realize the compression or the inflation process of medium.Relative rotation between two scroll is by being installed in the rotation-preventing mechanism between moving scroll and the standing part or claiming that arrestment mechanism guarantees.

Fig. 1 is the fundamental diagram of scroll compressor.Intakeport is at the outer surface of scroll, along with clockwise rotating of curved surface, compressed medium is sucked by the edge, enter enclosed volume, and in central motion, be compressed and volume reduces gradually, compressed media is discharged by the relief opening of deciding the scroll center, owing in the rotation process of bent axle, all form new aspirated volume, so above-mentioned compression process constantly repeats.Among Fig. 1, the 1st, intakeport, the 2nd, air aspiration cavity, the 3rd, fixed scroll, the 4th, moving scroll, the 5th, compression chamber, the 6th, air-breathing, the 7th, exhaust, the 8th, compression, the 9th, relief opening.

It promptly is decompressor that the bent axle of compressor rotates round about.

By the working principle of convolute-hydrodynamic mechanics as can be known, realize the working procedure of scroll machine, must have a rotation-preventing mechanism to guarantee relative rotation between the dynamic and static scroll; Also need a driving mechanism simultaneously, make the center of scroll make circular movement with respect to the center of fixed scroll, whole moving scroll is done the plane rocking motion, and this driving mechanism can be driven scroll centre-driven, can also drive at moving scroll circumferencial direction.

U.S. Pat 801182 has been described the notion of scroll machine, U.S. Pat 1376291 grades have also disclosed the principle of scroll compressor and pump, be characterized in: the motor driving crankshaft rotating drives moving scroll rotation, and dynamic and static scroll is meshing with each other and realizes the compression of medium; Between the moving scroll back side and bearing spider, Oldham's coupling is housed, play the guiding role; The thrust-bearing that is installed between the moving scroll back side and the bearing spider bears the axial force that the active chamber medium produces, its shortcoming is, because convolute-hydrodynamic mechanics active chamber axial force is very big, therefore, the frictional loss of thrust-bearing is very fast, and this kind mechanism is compensate for wear automatically, axial back lash is increased, thereby increase the leakage of medium by gap between vortex tooth top and the base plate, and since active chamber produce circumferentially and the support of radial force and bearing not in same plane, can be in operation produces a tilting moment, makes, run-off the straight between the dish of quiet whirlpool, thus wearing and tearing and leakage increased, influence the proper functioning of machine, to big capacity machinery, work loads is big, and situation is just more abominable.

The purpose of this utility model is to propose a kind of convolute-hydrodynamic mechanics, by the change to its moving scroll and fixed scroll structure, has overcome the shortcoming of prior art, it is few to have wearing and tearing, no tilting moment, vibration, noise reduce, and characteristics such as operate steadily, reliable.

One of characteristics of the present utility model are that the two sides of the base plate of scroll all processes the screw type tooth trace, the two sides tooth trace is mirror image (overlapping fully) at axial direction, two fixed scrolls are made up of screw type tooth trace and base plate respectively, it axially also is being to be mirror image (overlapping fully) that two fixed scrolls assemble its molded lines of back, molded lines is the opposite and installs, when moving scroll is rotated with respect to fixed scroll, mesh on some points with the flank of two fixed scrolls respectively two flute profile sides of moving scroll, thereby form the not co-content of symmetry and the motion active chamber of pressure distribution fully on axially on the two sides of moving scroll, be the volume of symmetrical position active chamber, pressure medium is identical.Another characteristics of the present utility model are that driving mechanism is distributed in circumference and non-central.Quiet, moving scroll is in uniform three holes of circumferencial direction difference, and the distance of the center in three holes to disk center all equates; Three bent axles with identical offset, structure is identical, and the eccentric crank journal of band cooperates with three holes of moving scroll respectively, and the main journal part of bent axle cooperates with three holes of fixed scroll respectively, then two fixed scrolls is tightened together; At the axle head of bent axle, connect three gears by couplings such as keys respectively, such three gears are planet and distribute, and with a gear that is positioned at the center, a center master gear and a main shaft link respectively.By above mechanism, can realize the output of energy or absorb energy, apparent expansion machine or compressor and decide.

Fig. 1 is the fundamental diagram of scroll compressor.

Fig. 2 is the structure principle chart that the utility model is applied to an embodiment of scroll compressor.

Fig. 3 is the A--A view.

Fig. 4 is the B--B view.

Fig. 5 is the structure principle chart of scroll.

Fig. 6, the 7th, the sealed structure chart between moving scroll and the fixed scroll.

Fig. 8,9 is structure principle charts of two fixed scrolls.

Below by drawings and Examples structural principle of the present utility model and working principle are done detailed explanation.

With reference to Fig. 5, the moving scroll 30 of this scroll compressor is made up of the screw type tooth 44 and 45 on base plate 46 and two sides, tooth 44 and tooth 45 axially are being mirror image, and two teeth all have the 38-40 of axial seal mechanism and 58-60(such as Fig. 6, shown in Figure 7 at tooth top), to stop the radial leakage of medium.With reference to Fig. 8,9,2, two fixed scrolls 32,33 are made up of base plate 50,49 and screw type tooth 48,51 respectively, and two static vortex tooth tooth tops also have 52-54 of axial seal mechanism shown in same Fig. 6,7 and 55-57 to stop by the fluid radial leakage between tooth top and the base plate.Two fixed scrolls tighten together by the screw 22 of circle distribution, scroll wrap is positioned at intermediate portion, this moment, two static vortex tooths axially were mirror image, moving scroll is assemblied between two fixed scrolls, like this, when compressor operating, volume, pressure distribution some active chambers of symmetry have fully been formed on moving scroll 30 base plates 46 both sides.Some suction port 41(on the base plate 50 of fixed scroll 32, have been opened as shown in Figure 4), be inhaled into active chamber by this suction port fluid, 25 is aspirating air pipe, and 24 is exhaust duct, the pressure distribution of active chamber is that the center is the highest, radially reduces gradually from the inside to the outside.

For obtaining effective axial seal, adopted the axial seal mechanism shown in Fig. 6,7, tooth top 38 at movable orbiting scroll tooth 45 is opened seal groove 61 along full-depth tooth length, seal element 40 and elastic element 39 are embedded in the sealing groove, the size of seal element 40 must guarantee to make it can little displacement take place axially and radially, the elastic force that elastic element 39 produces must guarantee that seal element 40 and the quiet whirlpool seat 50 of trying to get to the heart of a matter contacts, with the generation sealing effect.

Seal element 40 embeds along the scroll wrap total length, is made up of wear-resisting material.At the surface of contact 58 of scroll wrap 60, on the surface of contact 55 of tooth 57, the surface of contact 52 of tooth 54 above-mentioned sealing mechanism has been installed respectively.

With reference to Fig. 2, fixed scroll 32,33 has three uniform holes respectively along circumference, in bearing 28,37 load holes, cooperate with three bent axles 20, the main rovolving shaft center of axle is 63, each bent axle all has a crank journal, and the crank journal axle center is the turning radius that the distance between 62,62 and 63 equals moving scroll.

By Fig. 4,5 as can be known, moving scroll also has three uniform holes along circumference, and bearing 29 cooperates with the hole, and the crank journal of bent axle 20 cooperates with bearing 29, pass through said mechanism, rotary crankshaft 20 just can be realized the supercharging of active chamber fluid, and from the above, the power complete equilibrium vertically that active chamber produces is fallen, bearing load is greatly reduced, thereby fretting wear is greatly reduced, efficient improves; Because above-mentioned axial seal mechanism greatly reduces the leakage loss of fluid, the volumetric efficiency of machine and adiabatic efficiency improve simultaneously; In addition, adopt said structure, machine will can not produce tilting moment, so machine run is steady, and operational excellence.

The full balance of shaking force that the aequum 26,34 at bent axle 20 two ends will cause owing to the eccentric motion of moving scroll falls, and makes machine not have unbalance inertia force, and corresponding vibration, the noise that makes machine be in operation and produce reduces.

Three planetary pinions 35 respectively with master gear 13 engagements at center, master gear 13 is driven by main shaft 17, and external energy conversion device 16 is imported energy by energy conversion device 16, main shaft 17 rotations drive master gear, three planetary pinions 35 of corresponding drive make bent axle 20 rotations, and moving scroll is rotated from outside to inside, active chamber pressure radially raises from outside to inside gradually, realize the compression of the working medium of active chamber, high-pressure liquid is discharged, finish the machine works process from outlet pipe 24.

If compressor shown in Figure 2 is used as decompressor, then the working medium flow direction in contrast.Pressurized gas expansion driven bent axle 20 rotations of active chamber core drive main shaft 17 rotations by gear transmission, thereby give energy conversion device 16 with energy transfer, outwards export energy, as motor, break etc.

Whole fluid machinery is placed in the enclosing housing, enclosing housing is made up of housing 10 and 31, earlier two fixed scrolls are fixed and are fastened on the housing 10 by screw 22, by circumferential screw 21 two housings 10 and 31 is tightened together again, add a seal ring 18 between main shaft 17 and the housing 10, prevent escape of liquid, guarantee housing and extraneous pressure reduction, pipeline 25,24 and housing 31 between be added with seal ring 23,67, play identical seal action, the junction plane place of two housings is added with sealing gasket 66, like this, just forms a container at housing bottom, with it as oil trap, 64 is draining valve, and 65 is oil exit pipe, has through hole in the bottom between housing 31 and the fixed scroll 33, use an oil pump that oil is delivered to bearing, the working surface of gear, realize lubricating, again the oil in the oil trap is delivered to oil pump through behind the filter, recycle by pipeline 65.

Claims (5)

1, a kind of convolute-hydrodynamic mechanics, comprise an enclosing housing, fixed scroll in the enclosing housing, the moving scroll that matches with fixed scroll, feature of the present utility model is, said fixed scroll has two, and two fixed scrolls are combined symmetrically, be equipped with moving scroll in the middle of it, all there is the screw type tooth that can match with the helical tooth of two fixed scrolls respectively on the two sides of the base plate of said moving scroll.

2, fluid machinery according to claim 1, it is characterized in that, said fixed scroll is respectively fitted with three uniform bent axles along circumference, the axle journal of bent axle matches with three holes on the moving scroll respectively, the axle head of bent axle is connected with gear, three gears are meshed with a master gear that is positioned at the center, and master gear is disposed on the main shaft.

3, fluid machinery according to claim 1, it is characterized in that, configuration one sealing mechanism between the helical tooth of said fixed scroll and the helical tooth of moving scroll, said sealing mechanism comprises a seal groove along the distribution of tooth length direction, the elastic element that seal groove is embedded with seal element and cooperates with it.

4, fluid machinery according to claim 1 is characterized in that, the helical tooth of said two fixed scrolls axially is being mirror image.

5, fluid machinery according to claim 1 is characterized in that, the helical tooth on said moving scroll base plate two sides axially is being mirror image.

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