CN1085789C

CN1085789C - Compressor assembly with staked shell

Info

Publication number: CN1085789C
Application number: CN93114798A
Authority: CN
Inventors: 沃尔特·T·格拉斯保; 迪利普·S·萨斯
Original assignee: Copeland Corp LLC
Current assignee: Copeland LP
Priority date: 1993-11-15
Filing date: 1993-11-15
Publication date: 2002-05-29
Anticipated expiration: 2013-11-15
Also published as: CN1105423A

Abstract

The present invention relates to a method for connecting a machine case with an outer shell. An outer shell enters a plurality of holes formed on a machine case through plastic deformation, and the deformation of the shell material ensures that part materials enter unit holes of a bearing case without penetrating the wall of the outer shell, so that the integrity of the outer shell is kept. The shape of the outer shell part, which is removed, forms a cylindrical load bearing face with a closed angle for bearing magnitude axial force and circumferential force.

Description

Employing has the compressor set of a shell

The present invention relates to a kind of compressor set of sealing.More particularly, the present invention relates to a kind of chlamydate seal compression machine, shell is fixing with stake, resists the excessive load of axial and circumferential with unique mode.

The various designs of sealing electric compressor are that everybody knows technically.These designs comprise piston/cylinder type and eddy tube type (Scroll type).The present invention is applicable to all these different motor compressor Design of device; As example, be illustrated below in conjunction with a kind of sealing eddy tube type fluid machinery.

Eddy tube type fluid machinery has compressor section and motor portion, all is contained in the shell of a sealing, and the path of fluid is formed in the wall of can.The path of fluid generally by connecting tube to being connected with external equipment (for example, be applied in the refrigeration system vaporizer and condenser).

The eddy tube type compressor section has a compressor, and it comprises a non-track volute tube elements (non-orbit-ing scroll member) that cooperates with track volute tube elements (orbiting scroll member).These volute tube elements have the spirality outer cover, and outer cover is usually according to a curve moulding near involute, so that vertically erect from end plate.These volute tube elements are combined, and by closely cooperating each other of their outer covers, form pressure chamber betwixt.The volume of these pressure chambers moves and changes gradually with the track of track volute tube elements.The suction port of fluid links to each other with non-track volute tube elements, the close radially outermost outer end of pressure chamber of this element, and the outlet of fluid is then opened in the center portion near non-track volute tube elements.An Ovshinsky endless means (Oldham ' s ring mechanism) is located between track volute tube elements and the non-track volute tube elements, to prevent the rotational of track volute tube elements around it.

The bolt of non-track volute tube elements by many extensions is in cabinet, can allow relatively limited the moving axially between cabinet and non-track volute tube elements like this, additional device as non-track volute tube elements, be disclosed in that (application number is 07/591 in the patent application that is entitled as " the non-track volute pipe mounting type of eddy tube type machinery ", 444, the applying date is October 1 nineteen ninety), quoted as prior art in addition.

Track volute tube elements is by a crank-driven, to produce the orbiting with respect to static volute tube elements.The result is that the volume of above-mentioned pressure chamber little by little reduces, and the fluid that is enclosed in the chamber is compressed.Because of pressure chamber is connected with outlet, compression fluid will be discharged from outlet.Cabinet is fixed in the can place, and the connecting means of cabinet and can comprises adopts bolt, pin or spot welding to be connected, and/or compress or interference fit (press orshrink fitting).In this several method each all has its advantage, but its disadvantageous aspect is also arranged separately.

Compress or interference fit is most economical connecting means, it has the ability to bear the most power that is produced by assembling usually.Yet compressor set can produce the power that exceeds the bearing capacity that is pressed into matching design under certain condition.When producing so excessive power, cabinet can slide with respect to can vertically or circumferentially, thereby the operation of compressor set is had a negative impact.

The cabinet of welding can solve this difficulty, can bear to exceed normal power, but the cost of mass production is higher relatively.

With bolt cabinet being connected in shell also can address this problem, can bear and exceed normal power, prepare shell and inner member but its cost comprises,, make this method be not suitable for a large amount of productions technically so that be suitable for the bolt connection and still keep essential sealability.In addition, finish the cost problem of fastening operation and very firm connection piece exactly, also make this method lose its reliss.

Therefore, need a kind of the motor compressor chassis unit to be fixed in method on the can, the normal and improper power that the sealing shell produces in the time of should having the ability to bear compressor operation securely.Should be fixedly the method for cabinet should be not only cheaply but also reliable, be suitable for mass production.

The purpose of this invention is to provide and a kind of cabinet is connected in the technology of motor compressor capsul, this device is cheap, and can bear the normal or improper power that produces in the motor compressor operating process more reliably.

According to the invention provides a kind of compressor, comprising:

Shell,

Be contained in the compressor in the described shell, described compressor have one have an outer surface cabinet and

At least one mechanical connection between described shell and described cabinet, described mechanical connection is included in a groove on the described cabinet, and can put into the inside crushed element of the described shell of groove, described groove has total cylindrical form interior surface that is, be set as vertical with the described outer surface of described cabinet, described internal surface can be operated to resist the rotational motion of the relative described cabinet of described shell with the cooperation of the inside crushed element of described shell

The inside crushed element that it is characterized in that described shell has the part barrel surface, and described part barrel surface closely contacts with total cylindrical form interior surface of described groove.

Also provide a kind of motor compressor of sealing according to the present invention, having comprised:

A shell that limits longitudinal shaft,

Be located at the compressor in the described shell, described compressor has a cabinet, remain in the described shell, and facing to the normal forces that produces by press fit between the internal surface of the outer surface of described cabinet and described shell in normal operation,

At least one mechanical connection between described shell and described cabinet, described at least one mechanical connection is included in a groove on the described cabinet and can puts into the inside crushed element of the described shell of groove, described groove has total cylindrical form interior surface that is, be set as vertical with the described outer surface of described cabinet, the described shell that described internal surface is relative with described cabinet cooperates, described at least one mechanical connection provides enough confining force, with bear the excessive power that surpasses described normal forces and

One is located at and is used for described compressor is provided the motor of power in the described shell,

Below in conjunction with accompanying drawing, by further being described in detail and attached claim, purpose of the present invention, feature and advantage will see more clearly.

In the accompanying drawing:

Fig. 1 is the cross-sectional side elevation view according to hermetic compressor of the present invention.

Fig. 2 is used for realizing an enlarged view of the instrument of formation type (Staking forming) according to the present invention.

Fig. 3 is the further enlarged view of Fig. 1 circle 3-3 king-pile shape partial shape;

The present invention will be by an airtight eddy tube type compressor as example.Certainly the present invention is not limited to be used in the eddy tube type compressor, and in fact its a stake shape structure might be used to the motor compressor of any pattern or similarly mechanically.

An eddy tube type fluid machinery of the present invention is adopted in numeral 10 representatives among the figure, and it is the compressor of refrigeration system, and fluid machinery 10 is by capsul device 12, and compressor section 14 and motor part 16 are formed.Capsul device 12 is made up of lower casing 13, upper cap 15, lower bottom cover 17 and isolating plate 19.Lower bottom cover 17, lower casing 13, isolating plate 19 and upper cap 15 be at assembling fluid machinery 10 with the suction chamber 21 that forms sealing with when releasing chamber 56, adopt welding method securely, connect hermetically.Capsul 12 has an import parts 23 and an outlet member 25.

Compressor section 14 is by non-axle track volute tube elements 18, and track volute tube elements 20 and cabinet 22 are formed.Non-track volute tube elements 18 is made up of end plate and the parts 24 that have a chamber 26, has put a spirality coiling part 28 in the chamber.Non-track volute pipe has many protruding 30, and they are suitable for being connected with cabinet 22 with bolt 32.

Track volute tube elements 20 is made up of from the coiled coil spare 36 that end plate 34 vertically puts in chamber 26 end plate 34 and one.Spirality coiling part 36 closely cooperates, combines with cabinet 22 compressor section 14 that forms fluid machinery 10 with the spirality coiling part 28 of non-track volute tube elements 18 in common mode.Sealing chamber 52 is limited by close-fitting

spirality coiling part

28 and 36, and arranges to such an extent that be connected with the normal exit 54 of non-track volute pipe 18 central positions.Outlet 54 is communicated with the chamber 56 of releasing that is formed by isolating plate 19 and upper cap 15.

Cabinet 22 has many (3 or 4) radially overhanging lug boss (Lobes) 38 also is fixed on the capsul device 12.The lug boss 38 of cabinet aligns with the projection 30 of non-track volute tube elements 18, and has tapped hole 40 to be used for holding bolt 32 with fixing non-track volute tube elements 18.In its outer end, each lug boss 38 all has a garden cylindrical groove 42.

Compressor section 14 also comprises a crankshaft 46, and it has one and is engaged in the eccentric shaft portion 48 of track volute tube elements 20 by transmission sleeve pipe and bearing means 50.Balancer weight 60 is fixed in crankshaft 46, and the lower end of this crankshaft is by lower bearing equipment 64 supportings.Lower bearing equipment 64 is securely fixed on the housing apparatus 12, and its middle body 66 has the hole 68 of a lengthening, a shaft bearing 70 wherein is set, the lower end that is used for holding crankshaft 46.

Motor part 16 is made up of with the motor rotor 82 that is engaged in the crankshaft 46 of compressor section 14 motor stator 80 that firmly fixes lower casing 13 (preferably adopt and be pressed into cooperation).

The lug boss 38 of cabinet 22 is by being press-fit to the internal diameter of capsul device 12.Suitably behind the location, " piling instrument " (Staking tool) 90 radially pressed to housing to cabinet 22 in lower casing 13, lower casing 13 plastically is pressed into groove 42 and forms a plurality of annulars and adds a part 92, as shown in Figure 3.Lower casing 13 makes the limit 94 of groove 42 bite the metallic material of shell and form a shape locating face 92 after fully being out of shape.Owing to the undue weakening of case material or the plastic deformation of the upper case that pierced billet causes, can't influence the sealing of enclosed cavity 21.When eddy tube type fluid machinery was worked, the axial and circumferential power that compressor produces must be come balance by the connection between lug boss 38 and the lower casing 13.The size of groove 42 and number preferably can be born the undesired power of contingent greatest expected.

" piling instrument " 90 among Fig. 2,3 comprises one flat substantially circular 100, and a sphere 102 that protrudes is arranged on this face.Fillet part 104 has connected sphere 102 and ring surface 100.The circle diameter 106 of connecting part, above-mentioned two sides is got and is made datum diameter.

For with the shell material of hot rolled steel,, just can obtain the result who is satisfied with as long as datum diameter 106 equals 1.3 to 1.35 times of groove 42 diameters on the cabinet 22 with the characteristic of drawing.Sphere 102 is called nasal height from the distance that flat garden anchor ring 100 protrudes.Nasal height should equal approx will by " piling " and the thickness of material of lower casing.At last, the radius of sphere 102 is called the nose radius, and it should be approximately equal to 0.85 times of groove 42 diameters.According to these requirements, just can obtain being similar to piling face shown in Figure 2.The width of cylindricality locating face 92 is approximately equal to will be by 1/3 of the material thickness of the lower casing 13 of " piling ".

Should be pointed out that by test scroll shape unit 10 and find, the most reliable when thickness of the shell is approximately equal to 3.00 millimeters instantly.Cabinet 22 has the groove that 4 diameters all are approximately equal to 12.70 millimeters.Cabinet 22 be with about 2000 pounds of water pressures under the interference fit of 0.20/0.46 millimeter, be press-fit to lower casing 13.Then, 4 piling instruments 90 of lower casing 13 usefulness are squeezed into the groove 42 of 12.70 millimeters of 4 diameters; The datum diameter 106 of each piling instrument 90 is approximately 16,764 millimeters, and nasal height is approximately 3.045 millimeters, and the nose radius is approximately 10.80 millimeters.The stake shape of making like this is shown in Fig. 2 and 3, and it has a wide cylindricality locating face 92 of 1.0 to 1.3 millimeters.

The narration that example is executed in the excellent real choosing of the present invention has shown advantage of the present invention well above; Should be pointed out that and under claim scope of the present invention, can make amendment, distortion and improvement the present invention.

Claims

1. compressor comprises:

Shell,

The inside crushed element that it is characterized in that described shell has by making described shell inwardly partly charge into the part barrel surface that forms, and described part barrel surface closely contacts with total cylindrical form interior surface of described groove.

2. the motor compressor of a sealing comprises:

A shell that limits longitudinal shaft,

3. according to the hermetic motor compressor in the claim 2, it is characterized in that shell is extended, so as along compressor shaft to placing motor.

4. according to the hermetic motor compressor of claim 2, it is characterized in that described compressor is a rotary compressor.

5. according to the hermetic motor compressor of claim 4, it is characterized in that described compressor is the eddy tube type compressor.

6. according to the hermetic motor compressor of claim 3, it is characterized in that also comprise the live axle of Driven Compressor, this shaft extension is gone into the compressor cabinet.