CN102661275A

CN102661275A - Scroll compressor with anti-reversion device

Info

Publication number: CN102661275A
Application number: CN2012101391395A
Authority: CN
Inventors: 郭华明
Original assignee: SUZHOU YINGHUATE REFRIGERATION EQUIPMENT TECHNOLOGY Co Ltd
Current assignee: SUZHOU YINGHUATE REFRIGERATION EQUIPMENT TECHNOLOGY Co Ltd
Priority date: 2012-05-08
Filing date: 2012-05-08
Publication date: 2012-09-12

Abstract

The invention relates to a scroll compressor with an anti-reversion device, comprising a shell 1, a motor stator 11, a motor rotor 9, a driving main shaft 10, a first support frame 7, a second support frame 8, a first bearing 4, a second bearing 6, a third bearing 12, an upper scroll 3, a lower scroll 5, an air suction pipe 13, an exhaust pipe 2 and a high-low pressure cavity partition plate 17. The motor stator 11, the first support frame 7 and the second support frame 8 are all sleeved in the shell 1 to form rigid connection and do not have displacement relative to the shell 1 during normal operation. The first bearing 4 is installed in the first support frame 7, the second bearing 6 is installed in the second support frame 8, the first bearing 4 and the first support frame 7 are in rigid connection and the second bearing 6 and the second support frame 8 are in rigid connection. Relative motion is not allowed between the bearings and the support frames, and the first bearing 4 and the second bearing 6 at least comprise a unilateral bearing. The scroll compressor with the anti-reversion device, designed by the invention can thoroughly eliminate the possibility of reversion.

Description

A kind of scroll compressor that has anti-reverse mechanism

Technical field

Patent of the present invention relates to a kind of refrigeration, scroll compressor that has anti-reverse mechanism of air conditioner industry of being used for.

Background technique

Existing rotary compressor, because structural design features, its movement locus can rotate towards the design sense of rotation, can be referred to as is to be rotated in the forward, but also can be referred to as counterrotating towards the opposite moving direction rotation of design sense of rotation.But in existing product specification, tend to require compressor proper functioning the time can only be towards a direction motion, otherwise can produce some negative operational effects.For example: rotary compressor tends at exhaust side outlet valve is installed, and the scroll principle of forming involute in the scroll compressor has determined that all normal compression process can only be towards one of them direction rotation.And towards the opposite direction rotation of design sense of rotation, not only can not produce relevant compression effectiveness, and tend to cause noise, long-term counter-rotating operation also can damage problems such as compressor, therefore from the design angle of compressor, hopes to avoid producing counterrotating as far as possible.

Yet among existing product specification, the counter-rotating that compressor occurs is inevitable.The situation that counter-rotating occurs is mainly divided two kinds; The one: under situation such as shutdown under the normal operation or outage,, can promote inner axle rotor assembly this moment because there is height pressure reduction in compressor suction and discharge side; Produce reverse rotation; But it is relevant that this reverse rotation follows the pressure reduction of suction and discharge side to exist, and after in a single day pressure reduction balanced, counter-rotating also can stop immediately.The counter-rotating of second kind of situation appearance mainly is that the driving force that is produced by motor causes; This counter-rotating longer duration; If there are not effective control measure, might cause bigger noise, even cause the damage of compressor; For example: the sudden power that possibly run in the time of the individual event compressor operating powers on again; Perhaps condenser heat radiation motor bad or that abnormal high temperature the causes torque load(ing) deficiency that can provide and motor protecter are failed the compressor electric motor that situation took place counter-rotatings such as timely power-off protection, and the three phase electric machine power line connects the counter-rotating that persistency appears in the motor that all might cause compressor such as anti-, and counter-rotating at this moment mainly is by motor driving; Because the compressor no-load running of when counter-rotating and pressurized gas no longer; So operating current is little, and the motor protecter of compressor often is not easy to occur protection, and the counter-rotating that this moment, this motor caused can last till that the compressor inside temperature surpasses the protector qualification and just can stop.

Existing control compressor reverse rotation technology mainly is the uneven counter-rotating that is driven of suction and discharge side pressure difference that causes owing to reasons such as shutdown to first kind of situation; Main solution route includes: the exhaust side at compressor is installed outlet valve; Be used for the flowing of gas persistency that cutoff high surveys to low voltage side; Or when adopt increasing counter-rotating to the disturbance of oil sump; Thereby the height pressure difference energy that exists when consuming counter-rotating apace perhaps adopts these two kinds of ways to combine and reduces the time that counter-rotating continues.For second kind of situation, whether the driving force that produces during owing to the motor counter-rotating exists suction and discharge pressure reduction to have nothing to do greatly and with compressor, so above-mentioned method can not solve the reversal phenomenon that is driven by compressor electric motor.

Summary of the invention

The purpose of patent of the present invention is a kind of scroll compressor that has anti-reverse mechanism of design, and this kind compressor can be eliminated the possibility that counter-rotating appears in compressor up hill and dale.

Technological scheme of the present invention is:

A kind of scroll compressor that has anti-reverse mechanism, it has comprised housing 1, motor stator 11, rotor 9; Drive main spindle 10, the first supporting frames 7, the second supporting frames 8, clutch shaft bearing 4; Second bearing, 6, the three bearings 14, last vortex 3; Following vortex 5, sucking pipe 13, outlet pipe 2 and high low pressure chamber demarcation strip 17.Motor stator 11, the first supporting frames 7, the second supporting frames 8 all are set among the housing 1, and formation is rigidly connected, and when normal operation, and can not produce relative displacement between the housing 1.Clutch shaft bearing 4 is installed among first supporting frame 7, and second bearing 6 is installed among second supporting frame 8, and clutch shaft bearing 4 and first supporting frame 7 and second bearing 6 and second supporting frame 8 all be rigidly connected, and does not allow to produce relative movement between bearing and the supporting frame.

Drive main spindle 10 is set among the rotor 9, and its top eccentric part links to each other with the 3rd bearing 14, drives vortex 3 down, and its upper end links to each other with clutch shaft bearing 4, and its lower end links to each other with second bearing 6.Form the low pressure air suction chamber between last vortex 3 and the following vortex 5, intermediate compression chamber and high pressure gas chamber, the exhaust of compressor is 16 outflows through the exhaust passage, thereby get into exhaust cavity 15, and high low pressure chamber demarcation strip 17 is used for separating the exhaust side and the suction side of compressor.

Clutch shaft bearing 4 can be a unilateral bearing or other bearing, such as sliding bearing, and ball, needle bearing etc., second bearing 6 also can be a unilateral bearing or other bearing, such as sliding bearing, ball bearing etc.But must satisfy clutch shaft bearing 4 and second bearing 6 comprises a unilateral bearing at least.During the compressor proper functioning, drive main spindle 10 and clutch shaft bearing 4, the second bearings 6; The 3rd bearing 14 links to each other and is rotated in the forward, moving up and down scroll 3,5 pressurized gass of band; And pressurized gas are discharged to exhaust cavity 15, when counter-rotating occurring, because the clutch shaft bearing 4 and second bearing 6 have at least one to be unilateral bearing; And bearing 4 all is rigidly connected with bearing 6 and supporting frame; Because the unidirectional revolving property that has of unilateral bearing, so compressor can only rotate towards normal design direction, and the counter-rotating situation can not occur.

The beneficial effect of patent of the present invention:

This anti-reverse mechanism simple in structure, easy for installation, the compressor reverse rotation that can thoroughly prevent various situation simultaneously and occurred, and shortened the off time, thereby reduced that existing scroll compressor shutdown produced big and continue long noise.

Description of drawings:

The compressor arrangement schematic representation of Fig. 1 patent of the present invention

The unilateral bearing scheme of installation of Fig. 2 patent of the present invention

Embodiment

In conjunction with Fig. 1, shown in Figure 2, a kind of scroll compressor that has anti-reverse mechanism, it has comprised housing 1; Motor stator 11, rotor 9, drive main spindle 10, the first supporting frames 7; Second supporting frame 8, clutch shaft bearing 4, the second bearings 6, the three bearings 14; Last vortex 3, following vortex 5, sucking pipe 13, outlet pipe 2 and high low pressure chamber demarcation strip 17.During motor stator 11, the first supporting frames 7, the second supporting frames 8 all were set between the housing 1, formation was rigidly connected, and when normal operation, and can not produce relative displacement between the housing 1.Clutch shaft bearing 4 is installed among first supporting frame 7, and second bearing 6 is installed among second supporting frame 8, and clutch shaft bearing 4 and first supporting frame 7 and second bearing 6 and second supporting frame 8 all be rigidly connected, and does not allow to produce relative movement between bearing and the supporting frame.

Clutch shaft bearing 4 can be a unilateral bearing or other bearing, such as sliding bearing, and ball, needle bearing etc., second bearing 6 also can be a unilateral bearing or other bearing, such as sliding bearing, ball bearing etc.But must satisfy clutch shaft bearing 4 and second bearing 6 comprises a unilateral bearing at least.

Fig. 2 is the unilateral bearing scheme of installation, and Fig. 2 left and right side is respectively the plan view and the sectional drawing of one of them mounting type.Unilateral bearing 18 can be the interference compacting with the installation of bearing supporting frame 12, also adopts the flange riveted joint, and form such as be threaded.

2 kinds of forms can be adopted in the mounting point of unilateral bearing 18 in bearing supporting frame 12; First kind is the form of unilateral bearing and the combination of other bearing; Unilateral bearing 18 parts are installed in the bearing supporting frame 12, and the bearing supporting frame internal surface beyond the unilateral bearing mounting portion is other bearing (sliding forms such as needle roller); Unilateral bearing 18 can be installed in the upper end of bearing supporting frame 12; Middle or lower end, second kind be unilateral bearing through whole bearing supporting frame 12 internal surfaces, promptly the bearing supporting frame internal surface has only unilateral bearing not have other bearing.

Claims

1. scroll compressor that has anti-reverse mechanism, it has comprised housing (1), motor stator (11), rotor (9); Drive main spindle (10), first supporting frame (7), second supporting frame (8); Clutch shaft bearing (4), second bearing (6), the 3rd bearing (14); Last vortex (3), following vortex (5), sucking pipe (13); Outlet pipe (2) and high low pressure chamber demarcation strip (17) is characterized in that: motor stator (11), first supporting frame (7); During second supporting frame (8) all was set between the housing (1), formation was rigidly connected, and clutch shaft bearing (4) is installed among first supporting frame (7); Second bearing (6) is installed among second supporting frame (8), and clutch shaft bearing (4) and first supporting frame (7) all be rigidly connected with second bearing (6) and second supporting frame (8), does not allow to produce relative movement between bearing and the supporting frame; Clutch shaft bearing 4 can be a unilateral bearing or other bearing, and second bearing (6) also can be a unilateral bearing or other bearing, but comprises a unilateral bearing at least in clutch shaft bearing (4) and (6) two bearings of second bearing.

2. according to claims 1 described a kind of scroll compressor that has anti-reverse mechanism, it is characterized in that: the mounting point of unilateral bearing (18) in bearing supporting frame (12), can adopt 2 kinds of forms; First kind is the form of unilateral bearing and the combination of other bearing; Unilateral bearing (18) part is installed in the bearing supporting frame (12); Bearing supporting frame internal surface beyond the unilateral bearing mounting portion is that other bearing (slides; Forms such as needle roller), unilateral bearing (18) can be installed in the upper end of bearing supporting frame (12), middle or lower end; Second kind be unilateral bearing (18) through whole bearing supporting frame (12) internal surface, promptly bearing supporting frame (12) internal surface has only unilateral bearing (18) and does not have other bearing.

3. according to claims 1 described a kind of scroll compressor that has anti-reverse mechanism, it is characterized in that: unilateral bearing (18) can be the interference compacting with the installation of bearing supporting frame (12), also adopts forms such as the flange riveted joint perhaps is threaded.