CN2252901Y - Whirl compressor with medium pressure inside on its casing - Google Patents

Abstract

The utility model relates to a whirl type compressor with medium pressure in the casing of the whirl type compressor, which belongs to the technical field of fluid machinery, comprising a movable whirl disc and a fixed whirl disc, wherein, the movable whirl disc makes revolution motion corresponding to the fixed whirl disc, a pressure control mechanism is arranged on the fixed whirl disc, and the axial force of the movable whirl disc is balanced by medium pressure generated in the casing of the whirl type compressor through the pressure control mechanism. The utility model can be used for whirl refrigerating compressors, air compressors and hydraulic pumps, having low power consumption.

Description

In a kind of housing is the scroll compressor of middle pressure

The utility model belongs to field of fluid machinery, further relates to a kind of scroll compressor.

The scroll compressor axial force balance is the key issue of Design of Scroll Compressor.The known scroll compressor that can realize axial force balance, be on motion vortex dish end plate, to have the axial aperture that is communicated with back pressure cavity, intermediate compression chamber gas acts on an intermediate pressure behind at the motion vortex dish after axial aperture enters back pressure cavity, play the purpose of balance exercise scroll axial force and control axial clearance, but this method has increased internal leakage, has increased compression work.In addition, a large amount of lubricant oil have entered compression chamber through back pressure hole, have increased and have pressed oily power consumption, have reduced refrigerating capacity.

The purpose of this utility model provides and is the scroll compressor of middle pressure in a kind of housing.Middle pressure in the housing is to produce the axial force of utilizing the middle pressure in the housing to come the balance scroll compressor by being installed in fixed scroll pressure control mechanism behind.This compressor also has under the basicly stable condition of operating mode except that the advantage with back pressure control, and leakage and the pressure oil that can avoid back pressure hole to bring lose, thereby has improved the efficient of scroll compressor.

The utility model is achieved in that a kind of scroll compressor, have a motion vortex dish and a fixed scroll, each scroll all has an end plate and forms spiral vortex volume in end plate one side, motion and fixed scroll are fitted together the vortex volume are intermeshed, the bent axle of an actuation movement scroll, one frame places compressor, have through hole in the frame upper-end surface, on the frame circumferential surface, have the hole that the frame inner chamber is communicated with the housing inner chamber, install and fix scroll on frame, motion vortex dish and frame connect by an anti-rotation element.Pressure control mechanism is housed on the fixed scroll, and pressure control mechanism comprises a valve body, has three holes on the valve body, and a hole communicates with outlet pipe on the housing, and second hole communicates with the fixed scroll exhaust port, and the 3rd hole communicates with the compression case intracoelomic cavity.Valve inner is equipped with spool, and the spool outside is a multidiameter shaft, and valve core inside has shoulder hole, and spring is arranged in the shoulder hole.

Fig. 1 is the utility model structural representation.

Fig. 2 is a frame end face upper groove structural representation.

Fig. 3 is the hole structure schematic representation on the frame end face.

Below in conjunction with accompanying drawing the utility model is further described.

The utility model comprises a housing 1, oil storage pool 2 is arranged at the bottom of housing 1, supporting 3 bottoms that are fixed on housing 1 are immersed in the oil storage pool 2 simultaneously, frame 4 is fixed on the middle part of housing 1, bent axle 5 connects by rolling bearing 6 with frame 4, bent axle 5 lower ends cooperate with sliding bearing 7 in the supporting 3, and bent axle 5 is equipped with rotor 8a between frame 4 and supporting 3, and motor stator 8b is fixed on housing 1 inwall.Motion vortex dish 9 is placed on the face 4a of frame 4, by an anti-rotation element 10 motion vortex dish 9 is associated in frame 4, and the fixed scroll 11 that meshes with motion vortex dish 9 is fixed on the face 4b of frame 4.Fixed scroll 11 1 side draught air cavitys be contained in housing 1 on sucking pipe 12 communicate.Fixed scroll 11 1 sides are equipped with a pressure control mechanism, pressure control mechanism comprises a valve body 13, valve body 13 1 sides have a hole 13a and communicate with fixed scroll exhaust port 11a, hole 13a diameter is 8～20mm, valve body 13 1 sides have a hole 13b, with be contained in housing 1 on outlet pipe 14 communicate, hole 13b diameter is 8～20mm, valve body 13 1 sides have a hole 13c and communicate with housing 1 inner chamber 1a, hole 13c diameter is 0.5～5mm, spool 15 is equipped with in valve body 13 inside, and spool 15 profiles are multidiameter shaft 15a, and spool 15 inside are shoulder hole 15b, between spool 15 cavity 15c and valve body 13, spring 16 is housed, have annular seal groove on the big cylindrical of spool multidiameter shaft 15a, seal element 17,18 is housed in the seal groove.Motion vortex dish 9 has end plate 9a and forms spiral vortex volume 9b in end plate 9a one side.Fixed scroll 11 has end plate 11b and forms spiral vortex volume 11c in end plate 11b one side, motion vortex volume 9b and fixed scroll volume 11c are meshing with each other, the revolution motion that the crank throw 5a of bent axle 5 does with respect to fixed scroll 11 by sliding bearing 19 actuation movement scroll 9.Frame 4 big outer peripheral surface 4c and housing 1 endoporus press fit are divided into epicoele 1a to housing 1, cavity of resorption 1b two-part, and epicoele 1a and cavity of resorption 1b communicate with chamber 1b by vertically groove 4d on face 4b, and depth of groove is 2mm～8mm.The utility model embodiment offers uniform 6 groove 4d on circumferential surface 4c.Cavity of resorption 1b communicates by hole 4f with frame inner chamber 4e, and the utility model embodiment opens two symmetrical holes 4f, in frame inner chamber 4e, the balanced body 20 of fixing with bent axle 5 is housed.

Introduce working principle of the present utility model below.

After the stator 8b energising, rotor 8a drives bent axle 5 rotations, bent axle 5 actuation movement scroll 9 are made revolution motion with respect to fixed scroll 11, gas enters compression chamber by sucking pipe 12, exhaust port 11a by fixed scroll 11, valve body hole 13a enters the cavity 13f of valve body 13, enter cavity 13d through spool 15 and the slit 21 that 13e above the valve body 13 forms, enter housing inner chamber 1a through elongated hole 13c, go up gap 4d through the circumferential surface 4c of frame 4 and enter housing inner chamber 1b, hole 4f enters frame inner chamber 4e on frame 4, acts on motion vortex dish 9 behind, plays the balancing axial thrust effect.Because spool 15 forms slit 21 with 13e above the valve body 13 decompression is arranged, cavity 13d pressure is lower than cavity 13f place pressure, because elongated hole 13c has decompression, housing inner chamber 1a pressure is lower than cavity 13d pressure again again, housing inner chamber 1a, the pressure of 1b and frame inner chamber 4e equates.In frame inner chamber 4e, comparatively rational pressure should be 0.4～0.6 times of Compressor Discharge Pressure, can reach by the size of design spring 16 and the size of elongated hole 13c.When frame inner chamber 4e pressure meets the requirements of pressure, spool 15 moves to cavity 13d under the acting in conjunction of spring force and gas force, close the slit 21 between spool 15 and the valve body 13 top 13e, make gas no longer enter housing 1 inner chamber 1a, 1b and frame inner chamber 4e.When frame inner chamber 4e pressure was lower than setting value, spool 15 was moved to the left, and formed a slit 21 again, till frame inner chamber 4e pressure meets the demands.So both guaranteed the foundation of back pressure, avoided the leakage of gas again, and helped reducing power consumption and improve volumetric efficiency.

The utility model can be applicable to spiral cooling compressor, the vortex air compressing Machine and vortex hydraulic pump, have low in energy consumption, the characteristics that efficient is high.

Claims (5)

1, in a kind of housing is the scroll compressor of middle pressure, it comprises a motion vortex dish and a fixed scroll, each scroll all has an end plate and forms spiral vortex volume in end plate one side, motion and fixed scroll are fitted together the vortex volume are intermeshed, the bent axle of an actuation movement scroll, one frame places compressor, fixed scroll is housed on frame, motion vortex dish and frame connect by an anti-rotation element, it is characterized in that: on described fixed scroll, pressure control mechanism is housed, on the end face of described frame, have through hole, on the frame circumferential surface, have the hole that the frame inner chamber is communicated with the housing inner chamber.

2, scroll compressor as claimed in claim 1, it is characterized in that: have three holes on the valve body in the described pressure control mechanism, a hole communicates with outlet pipe on the housing, second hole communicates with the fixed scroll exhaust port, the 3rd hole communicates with the compression case intracoelomic cavity, and valve inner is equipped with spool, and the spool outside is a multidiameter shaft, valve core inside has shoulder hole, and spring is housed in the shoulder hole.

3, scroll compressor as claimed in claim 1 or 2 is characterized in that: the diameter in the hole that communicates with the fixed scroll exhaust port on the valve body, the hole that communicates with compressor exhaust pipe is 8～20mm; Diameter 0.5～the 5mm in the hole that communicates with the compression case intracoelomic cavity on the valve body.

4, scroll compressor as claimed in claim 1 is characterized in that: the through hole of described frame end face is a groove, and its degree of depth is 2mm～8mm.

5, scroll compressor as claimed in claim 1 is characterized in that: the through-hole diameter of described frame end face is 8～15mm.

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