CN215256977U - Double-suction pump transition flow passage - Google Patents

Abstract

The utility model provides a double entry pump transition runner. The double suction pump transition flow passage comprises a pump body, a suction chamber, a left side water pumping chamber, an upper transition cavity, a right side water pumping chamber, a right side secondary impeller, a lower transition cavity, a left side primary impeller, a shell opening ring, an impeller opening ring, a left side impeller, a right side impeller locking nut, a pump body opening ring, an end cover, a bushing and a drainage mechanism. The utility model provides an go up the transition chamber and be asymmetric structure with lower transition chamber for the fluid can be stable gets into the transition runner from left side pumping chamber, the cross sectional area of transition runner evenly increases regularly, guarantee that the medium steadily flows, reduce the hydraulic loss among the flow process, the efficiency is improved, this structure makes whole pump body structure nature and compact, do not occupy too much space, the single runner cross sectional area shape of transition runner all is the uniform variation, satisfy the uniform variation law of transition runner cross-section, finally reach and stably carry the effect of right side impeller import from left side impeller export with the fluid.

Description

Double-suction pump transition flow passage

Technical Field

The utility model relates to a pump body field especially relates to a double entry pump transition runner.

Background

The pump is controlled by a prime mover (motor), and is an energy device for converting energy output by the prime mover into medium pressure energy. The pump is mainly used for conveying liquid including water, oil, acid-base liquid, emulsion liquid, liquid metal and the like, and can also be used for conveying liquid, gas mixture and liquid containing suspended solids. The pump can be applied to agriculture, the fields of chemical industry, petroleum production, mining industry and metallurgical industry, the field of electric power and the like. Often can receive installation space to be restricted or when improving stability in these application fields, can lead to the pump occupation space big when adopting the pump of other structures, the dismouting is inconvenient, and the structure is complicated, and economic benefits is low.

Disclosure of Invention

In order to solve the defects in the prior art, the utility model provides a double suction pump transition runner.

The utility model adopts the following technical scheme:

the utility model provides a case name includes: the pump body, suction chamber, left side pressurized-water chamber, last transition chamber, right side pressurized-water chamber and lower transition chamber have been seted up in the pump body, and suction chamber, left side pressurized-water chamber, go up the transition chamber, go up and communicate the setting in proper order between transition chamber and the right side pressurized-water chamber, left side pressurized-water chamber internally mounted has left side impeller and left side primary impeller, and all installs left side impeller lock mother on left side impeller and the left side primary impeller, right side pressurized-water chamber installs right side impeller and right side secondary impeller, and installs right side impeller lock mother on right side impeller and the right side secondary impeller, pump body internally mounted has casing choma, impeller choma and pump body choma, the end cover is installed at the both ends of the pump body, install the bush in the pump body, drainage mechanism is installed to the lower extreme of the pump body, left side pressurized-water chamber gets into and goes up the transition chamber angle to be 79, passes through 90 corners and R137, The round corner transition of R65 guarantees smooth in the runner, the angle that the pumping chamber of left side gets into the transition chamber is 79, passes through 92 corner and R137, R65 round corner transition guarantees smooth in the runner again.

Preferably, the end cover comprises a non-driving end pump cover and a driving end pump cover, and the non-driving end pump cover and the driving end pump cover are respectively installed at the non-driving port and the driving port of the pump body.

Preferably, the bush includes left side bush, middle bush and right side bush, left side bush, middle bush and right side bush are installed respectively in the pump body inside near on its left end, middle part and right-hand member, and install middle axle sleeve in the middle bush.

Preferably, the drainage mechanism comprises a liquid outlet and a drain pipe, the liquid outlet is formed in the side wall of the lower side of the pump body and communicated with the inner portion of the lower transition cavity, the drain pipe is installed at the liquid outlet, and the drain pipe is transversely arranged and in threaded connection with the liquid outlet.

Preferably, annular sealing gaskets are arranged at the joint of the non-drive end pump cover and the port of the drive end pump cover and the pump body.

Preferably, the leakage fluid dram is close to the inside one end of lower transition chamber and is seted up flutedly, and installs sealed piece in the recess, sealed piece is unanimous with the inner wall junction radian of lower transition chamber, install the ejector pin of vertical setting in the leakage fluid dram, and the upper end and the sealed piece fixed connection of ejector pin, the cover is equipped with two lantern rings on the ejector pin, and is located a lantern ring and ejector pin sliding connection of top and through the inner wall fixed connection of second connecting rod and leakage fluid dram, and the fixed cover of a lantern ring that is located the below is located the lower extreme of ejector pin and through first connecting rod fixedly connected with sliding ring, sliding ring sliding connection is in the leakage fluid dram, be connected with the spring between first connecting rod and the second connecting rod.

The utility model has the advantages that:

1. the utility model has the advantages of compact structure, easy dismounting, and good stability, high efficiency, the upper transition chamber and the lower transition chamber are asymmetric structures, make fluid stably enter the transition flow passage from the left side pumping chamber, the cross-sectional area of the transition flow passage regularly and uniformly increases, guarantee the medium to stably flow, reduce the hydraulic loss in the flow process, the efficiency is improved, the structure makes the whole pump body structure natural and compact, not occupy too much space, the cross-sectional area shape of a single flow passage of the transition flow passage is uniformly changed, the uniform change rule of the cross-section of the transition flow passage is satisfied, finally, the effect of stably conveying the fluid from the left side impeller outlet to the right side impeller inlet is achieved;

2. by arranging the drainage mechanism, when the pump body is not used, water can be accumulated in the lower transition cavity, and accumulated water can be drained through the liquid outlet and the drainage pipe;

3. when the utility model needs to discharge the water accumulated in the lower transition cavity, the drain pipe can be screwed in by aiming at the liquid outlet, the slip ring is extruded, so that the first connecting rod drives the lower lantern ring to jack the top rod up the sealing block and compress the spring, the sealing block is separated from the groove, the liquid outlet is opened, accumulated water is discharged from the drain pipe through the liquid outlet, when the drain pipe is taken down, the sealing block returns to the groove under the elastic force action of the spring, the liquid outlet is sealed, the operation is simple, the use is convenient, the radian of the joint of the sealing block and the inner wall of the lower transition cavity is consistent, the port of the liquid outlet in the lower transition cavity of the lower transition cavity is sealed, the internal integrity of the lower transition cavity is kept, the flow of water flow is facilitated, and reduce the impact of rivers to the leakage fluid dram, protect the pump body, improved its life.

Drawings

Fig. 1 is a schematic structural diagram of a preferred embodiment of a transition flow channel of a double suction pump according to the present invention;

FIG. 2 is a side cross-sectional view of a portion of the structure shown in FIG. 1;

FIG. 3 is another schematic side sectional view of the structure of FIG. 1;

FIG. 4 is a hydraulic cross-sectional view of the upper transition chamber shown in FIG. 1;

FIG. 5 is a hydraulic cross-sectional view of the lower transition chamber shown in FIG. 1;

fig. 6 is a schematic view showing the structure of the drain pipe shown in fig. 1.

Reference numbers in the figures: 1. a pump body; 2. a suction chamber; 3. a left pumping chamber; 4. an upper transition chamber; 5. a right pumping chamber; 6. a right secondary impeller; 7. a lower transition chamber; 8. a liquid discharge port; 9. an intermediate bushing; 10. a left first-stage impeller; 11. a housing collar; 12. an impeller eye ring; 13. a non-drive end pump cover; 14. a drive end pump cover; 15. a left-side impeller; 16. a middle shaft sleeve; 17. a right-side impeller; 18. a right impeller lock nut; 19. a right side bushing; 20. a pump body orifice ring; 21. a left impeller locking nut; 22. a left side bushing; 23. drain pipe, 24, recess, 25, sealed piece, 26, ejector pin, 27, lantern ring, 28, sliding ring, 29, first connecting rod, 30, second connecting rod, 31, spring.

Detailed Description

The transition flow channel of the double suction pump provided by the embodiment comprises: the pump body 1, the suction chamber 2, the left side pumping chamber 3, the upper transition cavity 4, the right side pumping chamber 5, the right side secondary impeller 6, the lower transition cavity 7, the left side primary impeller 10, the shell choma 11, the impeller choma 12, the left side impeller 15, the right side impeller 17, the right side impeller lock nut 18, the pump body choma 20, the end cover, the bush and the drainage mechanism.

In the specific implementation process, as shown in fig. 1, fig. 2, fig. 3, fig. 4 and fig. 5, a pump body 1 is provided with a suction chamber 2, a left pumping chamber 3, an upper transition chamber 4, a right pumping chamber 5 and a lower transition chamber 7 in the pump body 1, the suction chamber 2, the left pumping chamber 3, the upper transition chamber 4, the lower transition chamber 7 and the right pumping chamber 5 are sequentially communicated, a left impeller 15 and a left primary impeller 10 are installed in the left pumping chamber 3, a left impeller lock nut 21 is installed on the left impeller 15 and the left primary impeller 10, a right impeller 17 and a right secondary impeller 6 are installed in the right pumping chamber 5, a right impeller lock nut 18 is installed on the right impeller 17 and the right secondary impeller 6, a casing mouth ring 11, an impeller mouth ring 12 and a pump body mouth ring 20 are installed in the pump body 1, end covers are installed at two ends of the pump body 1, and a bushing is installed in the pump body 1, the lower end of the pump body 1 is provided with a drainage mechanism, the left-side pumping chamber 3 enters the upper transition cavity 4 at an angle of 79 degrees, the smooth inside of the flow channel is ensured through transition of a corner of 90 degrees and R137 and R65 fillets, the left-side pumping chamber 3 enters the transition cavity 7 at an angle of 79 degrees, and the smooth inside of the flow channel is ensured through transition of a corner of 92 degrees and R137 and R65 fillets;

it should be noted that: when the pump head 1 is used, a medium entering from an inlet of the pump body 1 enters the left first-stage impeller 10 and the left impeller 15 through the suction chamber 2, works through the left first-stage impeller 10 and the left impeller 15 and then enters the left water pressurizing chamber 3, the left water pressurizing chamber 3 guides the medium into the upper transition chamber 4 and the lower transition chamber 7 of the transition flow channel, the medium coming out of the transition flow channel enters the right water pressurizing chamber 5 after working through the right impeller 17 and the right secondary impeller 6, and finally the medium is discharged from an outlet through the right water pressurizing chamber 5, and the shell opening ring 11, the impeller opening ring 12 and the pump body opening ring 20 are respectively used for installation among internal and external parts of the pump body 1;

tests show that the maximum efficiency of the large flow channel efficiency is about 2% -4% higher than that of the small flow channel efficiency. The efficiency of the small flow channel is low, but the small flow channel adopts internal transition, the structure is compact, and the application is increased along with the improvement of the casting process;

the utility model discloses compact structure not only, easy dismounting, and stability is good, high efficiency, it is asymmetric structure to go up transition chamber 4 and lower transition chamber 7, make the fluid can be stable to get into the transition runner from left side pumping chamber 3, the cross sectional area of transition runner evenly increases regularly, guarantee that the medium flows steadily, reduce the hydraulic loss of flow in-process, and the efficiency is improved, this structure makes whole pump body structure nature and compact, do not occupy too much space, the single runner cross sectional area shape of transition runner all is the uniform variation, satisfy transition runner cross-section uniform variation law, finally reach the effect of stably carrying the import of right side impeller from left side impeller export with the fluid.

Referring to fig. 2 and 3, the end cover includes a non-driving-end pump cover 13 and a driving-end pump cover 14, and the non-driving-end pump cover 13 and the driving-end pump cover 14 are respectively installed at the non-driving-end port and the driving-end port of the pump body 1;

it should be noted that: the driving shaft is arranged in the pump body 1, the non-driving port and the driving port of the pump body 1 are sealed and the driving shaft is arranged through the non-driving-end pump cover 13 and the driving-end pump cover 14, and the driving shaft is arranged with an external motor so as to drive the rotation of an impeller in the pump head 1.

Referring to fig. 2 and 3, the bush includes a left bush 22, a middle bush 9 and a right bush 19, the left bush 22, the middle bush 9 and the right bush 19 are respectively installed inside the pump body 1 near the left end, the middle part and the right end thereof, and the middle bush 9 is installed with the middle bushing 16 therein;

it should be noted that: the left bush 22, the middle bush 9 and the right bush 19 and the middle bushing 16 are used for the mounting of the drive shaft.

Referring to fig. 2 and 3, the drainage mechanism comprises a drainage port 8 and a drainage pipe 23, the drainage port 8 is arranged on the lower side wall of the pump body 1 and communicated with the interior of the lower transition cavity 7, the drainage pipe 23 is arranged at the drainage port 8, and the drainage pipe 23 is transversely arranged and in threaded connection with the drainage port 8;

it should be noted that: when the pump body 1 is not used, water can be accumulated in the lower transition cavity 7, and the accumulated water can be discharged through the liquid discharge port 8 and the water discharge pipe 23.

Annular sealing gaskets are arranged at the connection positions of the non-driving end pump cover 13 and the driving end pump cover 14 and the port of the pump body 1;

it should be noted that: the sealing performance of the pump body 1 is improved.

Referring to fig. 6, a groove 24 is formed at one end of the liquid discharge port 8 close to the inside of the lower transition cavity 7, a sealing block 25 is installed in the groove 24, the radian of the joint between the sealing block 25 and the inner wall of the lower transition cavity 7 of the lower transition cavity is consistent, a vertically arranged ejector rod 26 is installed in the liquid discharge port 8, the upper end of the ejector rod 26 is fixedly connected with the sealing block 25, two lantern rings 27 are sleeved on the ejector rod 26, one lantern ring 27 located above is slidably connected with the ejector rod 26 and is fixedly connected with the inner wall of the liquid discharge port 8 through a second connecting rod 30, one lantern ring 27 located below is fixedly sleeved at the lower end of the ejector rod 26 and is fixedly connected with a sliding ring 28 through a first connecting rod 29, the sliding ring 28 is slidably connected in the liquid discharge port 8, and a spring 31 is connected between the first connecting rod 29 and the second connecting rod 30;

it should be noted that: when water accumulated in the lower transition cavity 7 needs to be discharged, the drainage pipe 23 can be screwed in by aiming at the liquid discharge port 8, the sliding ring 28 is extruded, the first connecting rod 29 drives the lower lantern ring 27 to jack the ejector rod 26 up the sealing block 25 and compress the spring 31, the sealing block 25 is separated from the groove 24, the liquid discharge port 8 is opened, accumulated water is discharged from the drainage pipe 23 through the liquid discharge port 8, when the drainage pipe 23 is taken down, the sealing block 25 returns to the groove 24 under the action of elastic force of the spring 31 to seal the liquid discharge port 8, the operation is simple, the use is convenient, the radian of the connecting part of the sealing block 25 and the inner wall of the lower transition cavity 7 of the lower transition cavity is consistent, the port of the liquid discharge port 8, which is positioned in the lower transition cavity 7 of the lower transition cavity, is sealed, the internal integrity of the lower transition cavity 7 of the lower transition cavity is kept, the flow of water flow is facilitated, and the impact of the water flow on the liquid discharge port 8 is reduced, protect pump body 1, improved its life.

The utility model discloses a theory of operation does: when the pump body 1 is used, an external motor drives a driving shaft to rotate, so that an impeller inside the pump body 1 is driven to rotate, a medium entering from an inlet of the pump body 1 enters a left first-stage impeller 10 and a left impeller 15 through a suction chamber 2, the medium enters a left pressurized-water chamber 3 after acting through the left first-stage impeller 10 and the left impeller 15, the medium is guided into an upper transition chamber 4 and a lower transition chamber 7 of a transition flow channel by the left pressurized-water chamber 3, the medium coming out of the transition flow channel enters a right pressurized-water chamber 5 after acting through a right impeller 17 and a right secondary impeller 6, and finally the medium is discharged from an outlet through the right pressurized-water chamber 5;

when the pump body 1 is not used, water can be accumulated in the lower transition cavity 7, and the accumulated water can be discharged through the liquid discharge port 8 and the water discharge pipe 23.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the invention, and all modifications, equivalents, improvements and the like that are made within the spirit and principles of the present invention should be included in the scope of the present invention.

Claims (6)

1. A double suction pump transition flow passage, comprising: the pump body (1), set up suction chamber (2), left side pressurized-water chamber (3), go up transition chamber (4), right side pressurized-water chamber (5) and lower transition chamber (7) in the pump body (1), and suction chamber (2), left side pressurized-water chamber (3), go up transition chamber (4), down between transition chamber (7) and right side pressurized-water chamber (5) communicate the setting in proper order, left side pressurized-water chamber (3) internally mounted has left side impeller (15) and left side first impeller (10), and all installs left side impeller lock nut (21) on left side impeller (15) and the left side first impeller (10), right side impeller (17) and right side secondary impeller (6) are installed in right side pressurized-water chamber (5), and install right side impeller lock nut (18) on right side impeller (17) and right side secondary impeller (6), pump body (1) internally mounted has casing choma (11), Impeller choma (12) and pump body choma (20), the end cover is installed at the both ends of the pump body (1), install the bush in the pump body (1), drainage mechanism is installed to the lower extreme of the pump body (1), transition chamber (4) angle is 79 in left side pressurized-water chamber (3) entering, and pass through in 90 corners and R137, R65 fillet transition guarantee runner level and smooth, transition chamber (7) angle is 79 under left side pressurized-water chamber (3) entering, passes through in 92 corners and R137, R65 fillet transition guarantee runner in level and smooth.

2. The double suction pump transition flow passage of claim 1, wherein the end cover comprises a non-drive end pump cover (13) and a drive end pump cover (14), the non-drive end pump cover (13) and the drive end pump cover (14) being mounted at a non-drive port and a drive port of the pump body (1), respectively.

3. The double suction pump transition flow passage according to claim 1, wherein the liner includes a left liner (22), a middle liner (9) and a right liner (19), the left liner (22), the middle liner (9) and the right liner (19) are respectively installed inside the pump body (1) near the left end, the middle part and the right end thereof, and the middle bushing (16) is installed in the middle liner (9).

4. The transition flow passage of the double suction pump as claimed in claim 1, wherein the drainage mechanism comprises a drainage port (8) and a drainage pipe (23), the drainage port (8) is opened on the lower side wall of the pump body (1) and communicated with the interior of the lower transition cavity (7), the drainage pipe (23) is installed at the drainage port (8), and the drainage pipe (23) is transversely arranged and connected with the drainage port (8) in a threaded manner.

5. The double suction pump transition flow passage according to claim 2, wherein the connection of the ports of the pump body (1) and the pump covers (13, 14) at the non-driving end and the driving end are provided with annular sealing gaskets.

6. The double suction pump transition flow passage according to claim 4, wherein a groove (24) is formed at one end of the liquid discharge port (8) close to the interior of the lower transition cavity (7), a sealing block (25) is installed in the groove (24), the radian of the joint of the sealing block (25) and the inner wall of the lower transition cavity (7) is consistent, a vertically arranged ejector rod (26) is installed in the liquid discharge port (8), the upper end of the ejector rod (26) is fixedly connected with the sealing block (25), two lantern rings (27) are sleeved on the ejector rod (26), one lantern ring (27) positioned above is slidably connected with the ejector rod (26) and is fixedly connected with the inner wall of the liquid discharge port (8) through a second connecting rod (30), one lantern ring (27) positioned below is fixedly sleeved at the lower end of the ejector rod (26) and is fixedly connected with a slip ring (28) through a first connecting rod (29), the sliding ring (28) is connected in the liquid outlet (8) in a sliding mode, and a spring (31) is connected between the first connecting rod (29) and the second connecting rod (30).

Images