CN206175254U - CO recycle gas compressor - Google Patents

Abstract

The utility model provides a CO circulating air centrifugal compressor, it mainly including: main shaft, impeller, spacer, thrust disc, balancing disk, diaphragm coupling, diffuser, backward flow ware, bend, exit spiral housing, sealed, bearing group part, casing, its characterized in that: (1 )Adopt four impellers to establish ties on same main shaft, the impeller adopt two liang back to the form, previous impeller is the same with back one impeller exit diameter, between two adjacent impellers, the blade setting of a back impeller is for the certain angle of blade deflection of previous impeller, (2 )The diffuser adopts the combination of vaneless diffuser and vane diffuser, the vaneless diffuser in the front and the vane diffuser in the back, (3 )The baffle of compressor adopts mosaic structure, all adopts back baffle installation in the front on baffle in balancing disk both sides, forms the combination baffle, (4 )Adopt the exit spiral housing of baffle both sides area strengthening rib, (5 ) air inlet mode adopts two middle structures of giving vent to anger of admitting air of inclining. The compression of CO circulating air medium is particularly suitable for.

Description

A kind of CO recycle gas compressors

Technical field

The invention belongs to the technical field of centrifugal compressor, is related specifically to the CO circulations gas medium in chemical technology field Systems of Centrifugal Compressor Unit.

Background technology

In petrochemical enterprise, the requirement of different compressed media to the structural behaviour of compressor is also different , this is accomplished by the gas to different compressions and designs corresponding compressor bank, the production efficiency and profit of such Cai Nengshi companies Benefit reaches maximization.

The centrifugal compressor that at present major part petrochemical enterprise is applied has the compressor of horizonally split formula, cartridge type compression Machine (i.e. vertical subdivision), Axial Flow Compressor etc., the gas of the compressor conveying of these species is entered from the import of one end Enter in compressor, exported from the outlet of the other end after the supercharging of rotor, in entering into the process pipelines of user, even if having point It is that gas temperature is too high for two sections or three sections of compressor, passes the gas through the effect that cooler reaches cooling, again returns to pressure Pressure is improved in contracting machine.

In centrifugal compressor, main part is active wheel (impeller) and the diffuser, the return channel that are matched therewith, gas Body can obtain very big kinetic energy after impeller, in order to effectively utilize this part energy, diffuser is equipped with after the impeller. Diffuser is divided into two kinds of vaneless diffuser and vane diffuser by its structure, and they are very big for the performance for improving compressor has Effect.

The efficiency for how effectively making multistage centrifugal compressor is improved, and reduces manufacturing cost, there is provided a kind of in wider work The target pursued for the art scientific and technical personnel can be become with the high-efficient compressor of stabilized driving in the range of work.

Chinese patent CN1015489B discloses one kind《Multistage centrifugal compressor》, it is characterised in that：Compressor each leaf Wheel and connected diffuser composition one-level, at least four centrifugal rotors of compressor and at least four lead vane type diffuser (i.e. vane diffuser).The stator leading-edge radius for leading previous diffuser in vane type diffuser told and rotor outlet radius it Than the same ratio more than latter diffuser, and latter diffuser is close to the more described previous diffuser of discharge side.Except At different levels outer described in vane type diffuser with leading, also at least one-level is without stator diffuser.Because the rotation in diffuser takes off Sulfur is produced when backflow develops and is formed in the backflow band rotated in diffuser, and leads vane type diffuser by without stator Diffuser starts to occur the inner side at backflow position and arranges stator leading edge, the effect with anti-backflow, thus, one opening in return channel The backflow for beginning to occur is suppressed, and also avoids the generation for rotating desulfurization, such that it is able to make compressor reach very high efficiency, And can work in wider scope.

Chinese patent ZL92111548.2 discloses one kind《Centrifugal compressor》, it is characterised in that：The leaf of vane diffuser Piece is divided into two groups, and first group of blade deviates the leading edge that side plate extends towards central layer with along downstream direction inclination, second group Blade has the leading edge perpendicular to above-mentioned flow direction, and first group and second group of blade are configured in a mixed way；Also simultaneously It is provided with multiple auxiliary blades, the chord length of the chord ratio of each auxiliary blade each blade is short, auxiliary blade is with being seated in radially In inward position, one surface faces a blade；Auxiliary blade is also classified into two groups, and first group has and incline along downstream direction Tiltedly deviate the leading edge that above-mentioned side plate extends towards above-mentioned central layer；Second group of air inlet having perpendicular to above-mentioned flow direction Side, two groups of blades are also configured in a mixed manner.The tongue of above-mentioned blade and auxiliary blade spiral type gas channel is nearby dilute Thin；And be intensive in the part away from above-mentioned tongue of above-mentioned passage；And the vicinity of tongue is one and includes above-mentioned tongue And corresponding to the general region of no more than whole circumference.The position of this design leading edge can be reduced as far as possible closer to impeller Or adverse current is prevented, even if so as to can also prevent surge in low air velocity interval.Blade together with auxiliary blade not Uniform configuration forms a rarefaction and a compact district, also can as far as possible reduce the generation of rotating stall.

Chinese invention patent application case CN102434491A discloses one kind《Centrifugal compressor》, described vane diffuser Stator it is identical by trailing edge radius and the different long and short stator of length is constituted, at least configure a piece of between adjacent long stator Short-range missile leaf, using the rectified action of short-range missile leaf, improves the performance of compressor.

The starting point of above-mentioned all inventions is all focused in the internal structure of compressor, is not situated between for a certain compression Matter, and different medium to the internal structure of compressor require all be it is inconsistent, for example：The size and permutation and combination of impeller, expands The aspects such as the form of depressor intra vane, the arrangement of inlet and outlet are all different.The starting point of this exactly designer.

Utility model content

The purpose of this utility model is a kind of CO circulating air centrifugal compressor of design.We are from research CO gases in runner Flow behavior, design the compressor that suitable CO circulates gas medium, all reach most in the performance, efficiency, cost from compressor Optimization.

This utility model provides a kind of CO circulating air centrifugal compressor, and it is mainly included：Main shaft, impeller, spacer, push away Power disk, balancing frame, diaphragm coupling, diffuser, return channel, bend, import and export volute casing, sealing, bearing group parts, housing, its It is characterised by：

(1) using four impeller serials on same main shaft, impeller using two-by-two back to form, previous impeller with it is latter Diameter is identical at individual impeller outlet, and the different design concept of porch diameter, the form of impeller blade it is previous with latter It is different, from the impeller blade after balancing frame is also different before balancing frame, between two adjacent impellers, latter leaf The blade of wheel is arranged relative to the certain angle of the blade deflection of previous impeller；

(2) diffuser is using vaneless diffuser and combination with vane diffuser, and vaneless diffuser is in front and blade diffusion Device is rear；

(3) dividing plate of compressor adopts mosaic texture, and previous piece is arranged on using latter piece of dividing plate in balancing frame both sides On dividing plate, combination barrier is formed；

(4) the import and export volute casing with reinforcement using dividing plate both sides；

(5) intake method adopts the structure of outlet in the middle of bilateral air inlet.

CO recycle gas compressors of the present utility model, between described two impellers adjacent in impeller, latter impeller Blade arrange relative to the certain angle of the blade deflection of previous impeller；For backward leaning vane is：5~15 degree；For front Bent blades are：5~15 degree；For radial blade is 5~30 degree.

CO recycle gas compressors of the present utility model, described impeller is adopted to be arranged two-by-two back to form, can be effective The axial thrust that gas is produced to rotor is reduced, makes a whole set of unit operation more steady.

CO recycle gas compressors of the present utility model, described import and export volute casing of the outlet partition plate both sides with reinforcement be by Up and down two parts are spliced, and helical line type volute casing runner is respectively equipped with the plate face of dividing plate both sides, are distributed between the plate face of both sides and add Strong gusset；Also without ring stiffener on split between dividing plate top and the bottom.

CO recycle gas compressors of the present utility model, described dividing plate adopts mosaic texture, and second piece of dividing plate is arranged on the On one piece of dividing plate, so design for both sides gas more stably collects in air outlet, strong collision will not be produced, so as to also protect The steady of unit is demonstrate,proved.

CO circulating air intake method of the present utility model adopts both sides air intake structure simultaneously, gas then to be gone out by a chimney fan Gas, the lower casing of its compressor is air inlet with three QI KOU, i.e., two, and one is gas outlet.

Description of the drawings

Fig. 1 is the overall profile of CO recycle gas compressors of the present utility model；

Fig. 2 is the front view of CO recycle gas compressors of the present utility model；

Fig. 3 is the side view of CO recycle gas compressors of the present utility model；

Fig. 4 is side impeller constitutional diagram；

Fig. 5 is baffle combination figure.

Specific embodiment

Below in conjunction with the accompanying drawings CO recycle gas compressors of the present utility model are further described and are supplemented.

As shown in figure 1, CO recycle gas compressors of the present utility model include 1 casing, 2 dividing plate group portions, 3 rotors, 4 impeller sets Air duct, 7 chimney fans are entered in portion, 5 bearing group portions, 6.Wherein casing includes upper casing and lower casing；Dividing plate group portion include import dividing plate, Outlet partition plate and central dividing plate；Impeller sets portion includes four impellers, and blade shape is different, and the blade of latter impeller is arranged Relative to the certain angle of the blade deflection of previous impeller；For backward leaning vane is：5~15 degree；For forward curved vane is：5 ~15 degree；For radial blade is 5~30 degree；Bearing group portion includes spring bearing and thrust bearing.

Fig. 2 show the front view of the profile after this utility model CO recycle gas compressors are completed, can be clear Find out upper and lower enclosure by conjunction bolt is combined together, 6 enter air duct, 7 chimney fans positioned at the lower section of lower casing, enter air duct 6 respectively positioned at the both sides of lower casing, and chimney fan 7 is located at the centre of lower casing.Fig. 3 is shown side view of the present utility model.

Fig. 4 show the spread pattern of this utility model rotor upper left side impeller, and 41 impellers are straight with the exit of 42 impellers The size in footpath is identical, but the entrance of two impellers is differently sized, in 41 hub disks in the impeller reel of boring ratio 42 Hole is little；The impeller spread pattern of opposite side is identical with this side spread pattern, have only unlike impeller rotation direction it is different.

Fig. 5 show in this utility model dividing plate group portion the baffle combination form in left side, and dividing plate 21 is import dividing plate, dividing plate 22 is internal partition, and dividing plate 22 is arranged on dividing plate 21 and forms combined dividing plate.

Hereinafter we make further by specific embodiment to the parameter of CO recycle gas compressors of the present utility model Explanation.

CO recycle gas compressor of the embodiment 1 with forward curved vane

The present embodiment 1 is level Four centrifugal compressor, and, using binary double shrouded wheel is adopted, its blade is using antecurvature formula knot for impeller Structure, deflects in front and back 5 degree between two impeller blades；Vaneless diffuser is configured in low-pressure stage side, and vane diffuser is then configured in height Arbitrarily downgrade side.The adjustable air intake duct of remaining guide vane angle, outlet partition plate both sides import and export volute casing, outlet partition plate with reinforcement Import and export volute casing of the both sides with reinforcement, air sealing and oil seal group structure are as it was previously stated, without the need for separately adding explanation.

CO recycle gas compressor of the embodiment 2 with radial blade

The present embodiment 2 is level Four centrifugal compressor, and impeller adopts double shrouded wheel, impeller to adopt binary, and its blade adopts footpath To structure, 15 degree are deflected between the blade of two impellers in front and back；Vaneless diffuser configuration low-pressure stage side, after each vaneless diffuser Then configure vane diffuser.The import and export volute casing of the adjustable air intake duct of remaining guide vane angle, outlet partition plate both sides with reinforcement, Import and export volute casing of the outlet partition plate both sides with reinforcement, air sealing and oil seal group structure are as it was previously stated, without the need for separately adding explanation.

CO recycle gas compressor of the embodiment 3 with backward leaning vane

The present embodiment 3 is level Four centrifugal compressor, and, using binary double shrouded wheel is adopted, its blade is using swept-back knot for impeller Structure, deflects in front and back 5 degree between two impeller blades；Vaneless diffuser is configured in low-pressure stage side, and vane diffuser is then configured in height Arbitrarily downgrade side.The adjustable air intake duct of remaining guide vane angle, outlet partition plate both sides import and export volute casing, outlet partition plate with reinforcement Import and export volute casing of the both sides with reinforcement, air sealing and oil seal group structure are as it was previously stated, without the need for separately adding explanation.

CO recycle gas compressor of the embodiment 4 with backward leaning vane

The present embodiment 4 is level Four centrifugal compressor, and impeller adopts double shrouded wheel, and impeller is box-like with tlv triple using binary, Its blade adopts swept-back structure, deflects 15 degree between the blade of two impellers in front and back；Vaneless diffuser configuration low-pressure stage side, it is each Vane diffuser is then configured after individual vaneless diffuser.The adjustable air intake duct of remaining guide vane angle, outlet partition plate both sides band are strengthened Muscle imports and exports volute casing, import and export volute casing of the outlet partition plate both sides with reinforcement, air sealing and oil seal group structure as it was previously stated, nothing Explanation need to separately be added.

CO recycle gas compressor of the embodiment 5 with backward leaning vane

The present embodiment 5 is level Four centrifugal compressor, and impeller adopts double shrouded wheel, four impellers all using ternary wheel, its Blade adopts swept-back structure, deflects 10 degree between the blade of two impellers in front and back；Vaneless diffuser configuration low-pressure stage side, each Vane diffuser is then configured after vaneless diffuser.The adjustable air intake duct of remaining guide vane angle, outlet partition plate both sides band reinforcement Import and export volute casing, import and export volute casing of the outlet partition plate both sides with reinforcement, air sealing and oil seal group structure as it was previously stated, need not Separately add explanation.

Above-mentioned each scheme is only the design proposed according to the use condition of user's proposition, through senior engineer Accounting and contrast, finally selected design of the present utility model 3, use of the relative first two scheme of scheme 3 in unit The time limit, efficiency and other everyways are optimum.

This utility model have studied the performance parameter of CO recycle gas compressors and the arrangement of unit emphatically, and at this On the basis of, the structure of combination, air intake duct, import and export volute casing and oil sealing group to diffuser has carried out corresponding improvement, most end form Into this brand-new design.Its feature is optimum design for CO circulating air.

Claims (5)

1. a kind of CO circulating air centrifugal compressor, it is mainly included：Main shaft, impeller, spacer, thrust disc, balancing frame, diaphragm connection Axle device, diffuser, return channel, bend, import and export volute casing, sealing, bearing group parts, housing, it is characterised in that：

(1) using four impeller serials on same main shaft, impeller using two-by-two back to form, previous impeller and latter leaf Wheel exit diameter is identical, and between two adjacent impellers, the blade of latter impeller is arranged relative to previous impeller The certain angle of blade deflection；

(2) diffuser is using vaneless diffuser and combination with vane diffuser, and vaneless diffuser is front and vane diffuser exists Afterwards；

(3) dividing plate of compressor adopts mosaic texture, and previous piece of dividing plate is arranged on using latter piece of dividing plate in balancing frame both sides On, form combination barrier；

(4) the import and export volute casing with reinforcement using outlet partition plate both sides；

(5) intake method adopts the structure of outlet in the middle of bilateral air inlet.

2. CO circulating air centrifugal compressors as described in claim 1, it is characterised in that between described adjacent two impeller, The blade of latter impeller is arranged relative to the certain angle of the blade deflection of previous impeller；For backward leaning vane is：5~15 Degree；For forward curved vane is：5~15 degree；For radial blade is 5~30 degree.

3. CO circulating air centrifugal compressors as described in claim 1, it is characterised in that described outlet partition plate both sides band is strengthened The import and export volute casing of muscle is spliced by upper and lower two parts, is respectively equipped with helical line type volute casing runner in the plate face of dividing plate both sides, two Reinforcement gusset is distributed between lateral plates；Also without ring stiffener on split between dividing plate top and the bottom.

4. CO circulating air centrifugal compressors as described in claim 1, it is characterised in that described dividing plate adopts mosaic texture, Two pieces of dividing plates are arranged on first piece of dividing plate.

5. CO circulating air centrifugal compressors as described in claim 1, it is characterised in that described intake method is same using both sides When air intake structure, then by a chimney fan outlet, the lower casing of its compressor is air inlet with three QI KOU, i.e., two to gas Mouthful, one is gas outlet.