CN218598436U - Double-shaft single-stage split pump device - Google Patents

Abstract

The utility model discloses a single-stage pump equipment of opening in biax stretches, it includes the pump body, the pump cover, pivot and impeller body, the pivot includes left side axle, right side axle and connects the jackshaft of left side axle and right side axle, the jackshaft runs through impeller body and sets up, the left side axle is through a tip of first bearing setting at the pump body, the right side axle passes through another tip of second bearing setting at the pump body, the pump body and pump cover enclose to be established and are formed with the pump chamber, the left side axle is provided with the left side axle and stretches the tip, the right side axle is provided with the right side axle and stretches the tip. The utility model discloses a left side axle and right side axle one end at the pivot set up left axle respectively and stretch tip and right axle and stretch the tip, and the cooperation sets up primary shaft bearing and secondary shaft bearing respectively at the both ends of the pump body, stretches out the protruding primary shaft bearing setting of stretching out of tip with left axle, stretches out the protruding secondary shaft bearing setting of stretching out of tip with right axle to make things convenient for outside driving motor to connect left axle as required and stretch tip or right axle and stretch the tip, effectively avoid causing destruction to single-stage pump opening equipment.

Description

Double-shaft single-stage split pump device

Technical Field

The utility model belongs to the technical field of a well turn on pump technique and specifically relates to a biax is stretched single-stage well and is opened pump equipment is related to.

Background

The single-stage double-suction horizontal split pump is widely applied to water supply and drainage systems or cooling circulating water systems of industrial and mining enterprises such as steel, petrochemical engineering, thermal power generation, mines and the like, and can also be applied to urban tap water, circulating water of a heat supply system, farmland drainage and irrigation, various hydraulic engineering and the like. The split pump mainly comprises a pump body, a pump cover, a rotor component and an impeller body. This well turn-on pump's inlet and outlet flange all is on the pump body, when the rotor direction of rotation need be changed in the in-service use, needs will turn on the face bolt and tear open, lifts the pump cover, and reverse adjustment rotor part is unfavorable for production efficiency's improvement again.

Therefore, it is desirable to provide a double-shaft single-stage split pump device to solve the problems.

SUMMERY OF THE UTILITY MODEL

Based on this, the utility model aims to provide a biax stretches single-stage split pump equipment, when needs switch rotor direction of rotation, need not to unpack the pump cover apart and adjust the installation angle of rotor part, effectively improves production efficiency.

In order to solve the technical problem, the utility model discloses the technical scheme who adopts is: the utility model provides a biax stretches single-stage pump equipment that opens in, its includes the pump body, pump cover, pivot and impeller body, the pivot includes left side axle, right side axle and connects the jackshaft of left side axle and right side axle, the jackshaft runs through the impeller body setting, the left side axle sets up a tip at the pump body through first bearing frame, the right side axle passes through another tip of second bearing frame setting at the pump body, the pump body and pump cover enclose to be established and are formed with the pump chamber, pivot and impeller body set up at the pump intracavity, the left side axle is provided with the left side axle and stretches the tip, the right side axle is provided with the right side axle and stretches the tip, the left side axle stretches the protruding first bearing frame setting that stretches out of tip, the right side axle stretches out the protruding second bearing frame setting of tip.

In one embodiment, a positioning projection is convexly arranged on the intermediate shaft, a positioning clamping groove is formed in the inner side portion of the impeller body, and the positioning projection is clamped in the positioning clamping groove.

In one embodiment, the intermediate shaft is provided with limiting rings on two sides of the impeller body respectively, and the limiting rings are used for limiting two sides of the impeller body.

In one embodiment, a positioning ring is arranged on one side of the limiting ring, a positioning hole is formed in the positioning ring, a fixing hole is formed in the intermediate shaft, the positioning hole is matched with the fixing hole, and the positioning ring is fixed on the intermediate shaft through a screw.

In one embodiment, the first bearing seat comprises a first bearing body, a first accommodating cavity is arranged in the first bearing body, a first bearing is arranged in the first accommodating cavity, the left shaft penetrates through the first bearing, a first bearing end cover, a first bearing cover and a first bearing cover are sequentially arranged at the outer side part of the first bearing body from left to right, the first bearing cover and the first bearing cover are fixed together through bolts, the left shaft penetrates through the first bearing cover and the first bearing end cover, and the inner side wall of the first bearing cover is pressed against one side of the first bearing; first skeleton oil blanket is provided with respectively to first bearing body both sides, two first skeleton oil blanket sets up respectively in the mounting groove of first bearing end cover and first bearing gland.

In one embodiment, the first bearing seat further comprises a first nut disposed on a side of the first bearing.

In one embodiment, the second bearing seat comprises a second bearing body, a second accommodating cavity is arranged in the second bearing body, a second bearing is arranged in the second accommodating cavity, the left shaft penetrates through the second bearing, a second bearing end cover, a second bearing cover and a second bearing cover are sequentially arranged on the outer side of the second bearing body from left to right, the second bearing cover and the second bearing cover are fixed together through bolts, the left shaft penetrates through the second bearing cover and the second bearing end cover, and the inner side wall of the second bearing cover is pressed against one side of the second bearing; and second framework oil seals are respectively arranged on two sides of the second bearing body, and the two second framework oil seals are respectively arranged in the mounting grooves of the second bearing end cover and the second bearing cover.

In one embodiment, the second bearing housing further comprises a second nut disposed on a side of the second bearing.

In one embodiment, a first sealing cavity and a second sealing cavity are respectively arranged on the first bearing seat and the second bearing seat on the side facing the impeller body on the pump body and the pump cover, the first sealing cavity and the second sealing cavity are formed by enclosing the pump body and the pump cover, the first sealing cavity is connected with a first mechanical seal flushing pipe, the second sealing cavity is connected with a second mechanical seal flushing pipe, and the first mechanical seal flushing pipe and the second mechanical seal flushing pipe are respectively connected with the pump cover and are communicated with the pump cavity.

In one embodiment, a water inlet is formed in one side of the pump body, a water outlet is formed in the other side of the pump body, a first partition plate and a second partition plate are arranged in the pump cavity on the pump body and the pump cover, the pump cavity is divided into a first water inlet chamber, a water outlet chamber and a second water inlet chamber by the first partition plate and the second partition plate, the first water inlet chamber and the second water inlet chamber are respectively communicated with the water inlet, the water outlet chamber is communicated with the water outlet, a first liquid inlet and a second liquid inlet are respectively arranged on two sides of the impeller body, the first liquid inlet is communicated with the first water inlet chamber, the second liquid inlet is communicated with the second water inlet chamber, a partition part is arranged in the middle of the impeller body, the impeller body is divided into a first impeller chamber and a second impeller chamber by the partition part, first guide vane flow channels are formed by the partition part in the first impeller chamber, second guide vane chambers are formed by the partition part in the second impeller chamber, a first guide vane flow channel is formed by the partition part between two adjacent second guide vane flow channels, the first vane flow channel is communicated with the second guide vane flow channels, and a flow channel outlet is formed in the outer side of the impeller body.

To sum up, the utility model relates to a biax stretches single-stage pump equipment of opening in single-stage sets up left axle respectively through left side axle and right side axle one end at the pivot and stretches the tip and the right axle stretches the tip, the cooperation sets up primary shaft bearing and secondary shaft bearing respectively at the both ends of the pump body, stretch out the protruding primary shaft bearing setting of stretching out of tip with the left axle, stretch out the protruding secondary shaft bearing setting of tip with the right axle, thereby make things convenient for external drive motor to connect left axle as required and stretch out tip or right axle and stretch out the tip, effectively avoid causing destruction to single-stage pump equipment of opening, satisfy the different scene installation requirement of turning to of driving motor, easy operation is convenient.

Drawings

FIG. 1 is a sectional view showing the structure of a double-shaft single-stage axially split pump apparatus according to the present invention;

FIG. 2 is a schematic view of the pump body, the rotating shaft and the impeller according to the present invention;

fig. 3 is a first enlarged partial view of the double-shaft single-stage axially split pump apparatus of the present invention;

FIG. 4 is an enlarged view of a second portion of a double-shaft single-stage split pump apparatus of the present invention;

FIG. 5 is a third enlarged partial view of the double-shaft single-stage split pump apparatus of the present invention;

fig. 6 is a schematic structural view of a first viewing angle of the impeller body according to the present invention;

fig. 7 is a schematic structural view of a second view angle of the impeller body according to the present invention;

fig. 8 is a schematic structural diagram of a third view angle of the impeller body according to the present invention.

Detailed Description

The technical solutions of the present invention will be described more clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1 to 8, the utility model relates to a double-shaft-extension single-stage split pump device, which comprises a pump body 10, a pump cover 20, a rotating shaft 30 and an impeller body 40, the rotating shaft 30 comprises a left shaft 31, a right shaft 32 and an intermediate shaft 33 connecting the left shaft 31 and the right shaft 32, the left shaft 31, the right shaft 32 and the intermediate shaft 33 are integrally formed, the intermediate shaft 33 is arranged by penetrating through the impeller body 40, the left shaft 31 is arranged at one end of the pump body 10 through a first bearing seat 50, the right shaft 32 is arranged at the other end of the pump body 10 through a second bearing seat 60, the pump body 10 and the pump cover 20 are surrounded to form a pump cavity 70, the rotating shaft 30 and the impeller body 40 are arranged in the pump cavity 70, the left shaft 31 is provided with a left shaft extension end 311, the right shaft 32 is provided with a right shaft extension end 321, the left shaft extension end 311 protrudes out of the first bearing seat 50, so as to facilitate the connection of an external driving motor; the right shaft extension end 321 protrudes out of the second bearing seat 60, thereby facilitating the connection of an external driving motor.

The left shaft 31 and the right shaft 32 are symmetrically arranged on two sides of the middle shaft 33 penetrating through the impeller body 40, the left shaft extension end part 311 and the right shaft extension end part 321 which are identical in structure are respectively arranged at one end of the left shaft 31 and one end of the right shaft 32, an external driving motor can be selectively arranged on the left shaft extension end part 311 or the right shaft extension end part 321 according to actual needs, the pump cover 20 does not need to be detached from the pump body 10 and then the rotating shaft 30 is turned over for 180 degrees and fixed on the first bearing seat 50 and the second bearing seat 60, damage to single-stage pump opening equipment is effectively avoided, the field installation requirements of the driving motor in different rotation directions are met, the cost is low, and the operation is simple and convenient.

In one embodiment, the middle shaft 33 is provided with a positioning protrusion 331 thereon, the inner side of the impeller body 40 is provided with a positioning slot 401, and the positioning protrusion 331 is clamped in the positioning slot 401, so that the impeller body 40 is tightly fixed on the middle shaft 33 and rotates along with the rotation of the middle shaft 33.

In one embodiment, the intermediate shaft 33 is provided with a limiting ring 80 on each of two sides of the impeller body 40, and the limiting rings 80 are used for limiting two sides of the impeller body 40, so as to prevent the impeller body 40 from swinging back and forth along the axial direction of the rotating shaft 30 to cause the water conveying efficiency of the split pump apparatus.

In one embodiment, the shaft diameters of the left shaft-extending end portion 311 and the right shaft-extending end portion 321 are sequentially increased toward the middle shaft 33, and the left shaft-extending end portion 311 and the right shaft-extending end portion 321 are in a stepped shaft structure to meet the connection requirements of the connecting components with different sizes.

In one embodiment, a positioning ring 90 is arranged on one side of the limiting ring 80, a positioning hole is formed in the positioning ring 90, a fixing hole is formed in the intermediate shaft 33, the positioning hole and the fixing hole are arranged in a matching manner, and the positioning ring 90 is fixed on the intermediate shaft 33 through a screw; specifically, the screw member penetrates through the positioning hole and is disposed in the fixing hole, so that the positioning ring 90 is stably fixed on the intermediate shaft 33.

In one embodiment, the first bearing seat 50 includes a first bearing body 51, a first receiving cavity 511 is disposed in the first bearing body 51, a first bearing 52 is disposed in the first receiving cavity 511, the left shaft 31 is disposed through the first bearing 52, a first bearing end cover 53, a first bearing cover 54 and a first bearing cover 55 are sequentially disposed on an outer side portion of the first bearing body 51 from left to right, the first bearing cover 54 and the first bearing cover 55 are fixed together by bolts, the left shaft 31 is disposed through the first bearing cover 55 and the first bearing end cover 53, an inner side wall of the first bearing cover 54 abuts against one side of the first bearing 52, so as to improve the stability of the first bearing 52 clamped in the first receiving cavity 511; first skeleton oil blanket 56 is provided with respectively to first bearing body 51 both sides, two first skeleton oil blanket 56 sets up respectively in the mounting groove of first bearing end cover 53 and first bearing cap 55, prevents effectively that the thin oil from spilling, prevents effectively simultaneously that outside dust from entering into inside first bearing frame 50.

In one embodiment, the first bearing seat 50 further includes a first nut 57, the first nut 57 is disposed on one side of the first bearing 52, and the first nut 57 limits the first bearing 52, so as to further improve the stability of the first bearing 52 being clamped in the first receiving cavity 511.

In one embodiment, the second bearing seat 60 includes a second bearing body 61, a second receiving cavity 611 is formed in the second bearing body 61, a second bearing 62 is formed in the second receiving cavity 611, the left shaft 31 is disposed through the second bearing 62, a second bearing end cover 63, a second bearing cover 64 and a second bearing cover 65 are sequentially disposed on an outer side portion of the second bearing body 61 from left to right, the second bearing cover 64 and the second bearing cover 65 are fixed together by bolts, the left shaft 31 is disposed through the second bearing cover 65 and the second bearing end cover 63, an inner side wall of the second bearing cover 64 abuts against one side of the second bearing 62, so as to improve stability of the second bearing 62 being clamped in the second receiving cavity 611; second skeleton oil blanket 66 is provided with respectively to second bearing body 61 both sides, two second skeleton oil blanket 66 sets up respectively in the mounting groove of second bearing end cover 63 and second bearing cap 65, prevents effectively that the thin oil from spilling, prevents effectively simultaneously that outside dust from entering into inside second bearing frame 60.

In one embodiment, the second bearing seat 60 further includes a second nut 67, the second nut 67 is disposed on one side of the second bearing 62, and the second nut 67 limits the second bearing 62, so as to further improve the stability of the second bearing 62 being clamped in the second receiving cavity 611.

In one embodiment, the pump body 10 and the pump cover 20 are respectively provided with a first mechanical seal cavity 101 and a second mechanical seal cavity 102 on the sides of the first bearing seat 50 and the second bearing seat 60 facing the impeller body 40, the first mechanical seal cavity 101 and the second mechanical seal cavity 102 are defined by the pump body 10 and the pump cover 20, the first mechanical seal cavity 101 is connected with a first mechanical seal flushing pipe 103, the second mechanical seal cavity 102 is connected with a second mechanical seal flushing pipe 104, and the first mechanical seal flushing pipe 103 and the second mechanical seal flushing pipe 104 are respectively connected with the pump cavity 20 and are arranged in communication with the pump cavity 70, so that the liquid in the pump cavity 70 flows into the pump cavity 70 to cool the mechanical seal components in the first mechanical seal cavity 101 and the second mechanical seal cavity 102.

In one embodiment, a water inlet 11 is disposed on one side of the pump body 10, a water outlet (not shown) is disposed on the other side of the pump body 10, a first partition plate 105 and a second partition plate 106 are disposed in the pump chamber 70 on the pump body 10 and the pump cover 20, the pump chamber 70 is divided into a first water inlet chamber 71, a water outlet chamber 72 and a second water inlet chamber 73 by the first partition plate 105 and the second partition plate 106, the first water inlet chamber 71 and the second water inlet chamber 73 are respectively communicated with the water inlet 11, the water outlet chamber 72 is communicated with the water outlet, a first liquid inlet 41 and a second liquid inlet 42 are respectively disposed on both sides of the impeller body 40, the first liquid inlet 41 is communicated with the first water inlet chamber 71, the second liquid inlet 42 is communicated with the second water inlet chamber 73, a dividing portion 43 is disposed in the middle of the impeller body 40, the dividing portion 43 divides the impeller body 40 into a first impeller chamber 44 and a second impeller chamber 45, a first blade chamber 44 is disposed in the first impeller chamber 44, a second blade chamber 442 is disposed in the second impeller chamber 45, a guide vane outlet channel 442 is formed between the adjacent first blade 441, and a second blade outlet channel 452 is disposed in the second impeller chamber 452, and a guide vane outlet channel 442 is disposed in the second blade chamber 452, and a guide channel 452 is disposed in the second blade channel 452 is disposed in the pump body 452, and a guide channel 442 is disposed in the second blade chamber 452, and a guide channel 452 is disposed in the second guide channel 452, and a guide channel 452 is disposed in the guide channel 442, and a guide vane outlet channel 452 is disposed in the guide channel 452, and a guide channel 452 is disposed in the guide vane outlet channel 452, and a guide channel 452 is disposed in the guide channel 452, and a guide vane outlet channel 452 is disposed in the guide channel 452.

When the utility model particularly works, an external driving motor is connected with the left shaft extension end part 311 at one end of the rotating shaft 30 through a coupler, the rotating shaft 30 rotates to drive the impeller body 40 to rotate synchronously, liquid outside the equipment enters the first water inlet chamber 71 and the second water inlet chamber 73 through the water inlet 11, and the liquid is discharged through the water outlet of the equipment after flowing through the flow channel outlet 46 from the first guide vane flow channel 442 and the second guide vane flow channel 452 together through the rotation of the impeller body 40; when other driving motors with different rotation directions are selected, the driving motors need to be adjusted to be connected with the right shaft extension end part 321 at one end of the rotating shaft 30 through the coupler, so that normal operation of the pump opening device is realized, the rotating shaft 30 does not need to be turned over by 180 degrees and fixed on the first bearing seat 50 and the second bearing seat 60 after the pump cover 20 is detached and separated from the pump body 10, damage to single-stage pump opening devices is effectively avoided, the field installation requirements of the driving motors with different rotation directions are met, the cost is low, and the operation is simple and convenient.

To sum up, the utility model relates to a biax stretches single-stage pump equipment of opening in single-stage sets up left axle respectively through left side axle 31 and right side axle 32 one end at pivot 30 and stretches tip 321, the cooperation sets up primary shaft bearing 50 and secondary shaft bearing 60 respectively at the both ends of the pump body 10, stretch out the protruding primary shaft bearing 50 setting of tip 311 with left axle, stretch out the protruding secondary shaft bearing 60 setting of tip 321 with right axle, thereby make things convenient for external drive motor to connect left axle as required and stretch out tip 311 or right axle and stretch out tip 321, effectively avoid causing destruction to single-stage pump equipment of opening, satisfy the different scene installation requirement of turning to of driving motor, and easy operation is convenient.

The above-mentioned embodiments only represent several embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (10)

1. The utility model provides a single-stage pump equipment of opening in biax is stretched which characterized in that: including the pump body, pump cover, pivot and impeller body, the pivot includes left side axle, right side axle and connects the jackshaft of left side axle and right side axle, the jackshaft runs through the impeller body setting, the left side axle sets up a tip at the pump body through first bearing frame, the right side axle passes through second bearing frame and sets up another tip at the pump body, the pump body and pump cover enclose to establish and are formed with the pump chamber, pivot and impeller body set up in the pump intracavity, the left side axle is provided with the left side axle and stretches the tip, the right side axle is provided with the right side axle and stretches the tip, the protruding first bearing frame setting of stretching out of tip of left side axle, the protruding second bearing frame setting of stretching out of tip of right side axle.

2. The double-shaft-extension single-stage split pump apparatus according to claim 1, wherein: the middle shaft is convexly provided with a positioning lug, the inner side part of the impeller body is provided with a positioning clamping groove, and the positioning lug is clamped in the positioning clamping groove.

3. The apparatus of claim 2, wherein: the middle shaft is provided with limiting rings on two sides of the impeller body respectively, and the limiting rings are used for limiting two sides of the impeller body.

4. The apparatus of claim 3, wherein: the positioning device is characterized in that a positioning ring is arranged on one side of the limiting ring, a positioning hole is formed in the positioning ring, a fixing hole is formed in the middle shaft, the positioning hole is matched with the fixing hole, and the positioning ring is fixed on the middle shaft through a screw piece.

5. The double-shaft-extension single-stage split pump apparatus according to claim 1 or 2, wherein: the first bearing seat comprises a first bearing body, a first containing cavity is arranged in the first bearing body, a first bearing is arranged in the first containing cavity, the left shaft penetrates through the first bearing, a first bearing end cover, a first bearing cover and a first bearing cover are sequentially arranged on the outer side of the first bearing body from left to right, the first bearing cover and the first bearing cover are fixed together through bolts, the left shaft penetrates through the first bearing cover and the first bearing end cover, and the inner side wall of the first bearing cover is pressed on one side of the first bearing; first skeleton oil blanket is provided with respectively to first bearing body both sides, two first skeleton oil blanket sets up respectively in the mounting groove of first bearing end cover and first bearing gland.

6. The apparatus of claim 5, wherein: the first bearing seat further comprises a first nut, and the first nut is arranged on one side of the first bearing.

7. A double-extension single-stage split pump apparatus according to claim 1 or 2, wherein: the second bearing seat comprises a second bearing body, a second containing cavity is arranged in the second bearing body, a second bearing is arranged in the second containing cavity, the left shaft penetrates through the second bearing, a second bearing end cover, a second bearing cover and a second bearing cover are sequentially arranged on the outer side of the second bearing body from left to right, the second bearing cover and the second bearing cover are fixed together through bolts, the left shaft penetrates through the second bearing end cover and the second bearing end cover, and the inner side wall of the second bearing cover is pressed on one side of the second bearing; and second framework oil seals are respectively arranged on two sides of the second bearing body, and are respectively arranged in mounting grooves of the second bearing end cover and the second bearing cover.

8. The apparatus of claim 7, wherein: the second bearing seat further comprises a second nut, and the second nut is arranged on one side of the second bearing.

9. The double-shaft-extension single-stage split pump apparatus according to claim 1 or 2, wherein: the pump body and the pump cover are respectively provided with a first mechanical seal cavity and a second mechanical seal cavity on one sides of the first bearing seat and the second bearing seat towards the impeller body, the first mechanical seal cavity and the second mechanical seal cavity are formed by enclosing the pump body and the pump cover, the first mechanical seal cavity is connected with a first mechanical seal flushing pipe, the second mechanical seal cavity is connected with a second mechanical seal flushing pipe, and the first mechanical seal flushing pipe and the second mechanical seal flushing pipe are respectively connected with the pump cover and are communicated with the pump cavity.

10. The double-shaft-extension single-stage split pump apparatus according to claim 1 or 2, wherein: the pump comprises a pump body and a pump cover, and is characterized in that a water inlet is formed in one side of the pump body, a water outlet is formed in the other side of the pump body, a first partition plate and a second partition plate are arranged in the pump cavity on the pump body and the pump cover, the pump cavity is divided into a first water inlet chamber, a water outlet chamber and a second water inlet chamber by the first partition plate and the second partition plate, the first water inlet chamber and the second water inlet chamber are respectively communicated with each other, the water outlet chamber and the water outlet are communicated with each other, a first liquid inlet and a second liquid inlet are respectively arranged on two sides of the impeller body, the first liquid inlet and the first water inlet chamber are communicated with each other, the second liquid inlet and the second water inlet chamber are communicated with each other, a partition part is arranged in the middle of the impeller body, the impeller body is divided into a first impeller chamber and a second impeller chamber by the partition part, first guide vane passages are arranged in the first impeller chamber, second guide vane chambers are arranged in the second impeller chamber, first guide vane passages are formed between two adjacent guide vane passages, and second guide vane passages are formed between the second guide vane passages, and outlets are arranged on the outer side of the impeller body.

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