CN212717187U - Single-stage single-suction horizontal split pump - Google Patents

Single-stage single-suction horizontal split pump Download PDF

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Publication number
CN212717187U
CN212717187U CN202021457073.0U CN202021457073U CN212717187U CN 212717187 U CN212717187 U CN 212717187U CN 202021457073 U CN202021457073 U CN 202021457073U CN 212717187 U CN212717187 U CN 212717187U
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China
Prior art keywords
suction
pump
impeller
stage
horizontal split
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CN202021457073.0U
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Chinese (zh)
Inventor
张培富
秦勇
王成文
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Shanghai Liancheng Group Suzhou Co Ltd
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Shanghai Liancheng Group Suzhou Co Ltd
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Abstract

The utility model relates to a single-stage single-suction horizontal type split pump, including pump seat, pump cover and rotor module, the pump cover is installed and is formed the pump body on the pump seat, and the pump body is worn out at the rotor module both ends, is equipped with a pressurized-water chamber and a room that absorbs water of intercommunication each other in the pump body, and pump seat both sides are equipped with sunction inlet and exhalant outlet respectively, and the sunction inlet is connected the room that absorbs water, and the exhalant outlet is connected the pressurized-water chamber, and rotor module includes a single impeller that absorbs water, and this single impeller that absorbs water sets up in the pressurized-water chamber, and the impeller import intercommunication room. Compared with the prior art, the utility model discloses open pump in than traditional single-stage double suction can effectively improve than the rotational speed to improve its working effect, and simple structure, compactness, casting processing is simple, and the cost of formation is low.

Description

Single-stage single-suction horizontal split pump
Technical Field
The utility model relates to a well turn-on pump especially relates to a horizontal well turn-on pump is inhaled to single-stage list.
Background
Currently, the most common split-off pump on the market is a single-stage, double-suction, split-off pump as shown in fig. 1. Compared with the common centrifugal pump, the split pump has the characteristics of long service life, reasonable structure, convenient installation and maintenance and the like, and particularly has the unique advantages of large flow and high cavitation resistance, so the single-stage double-suction split pump is quite widely applied.
For the centrifugal pump, the efficiency of the pump is generally highest when the specific speed is between 120 and 210, and the efficiency of the pump gradually decreases when the specific speed is lower than 120 and higher than 210, particularly the efficiency of the pump sharply decreases when the specific speed is lower than 80. For the split pump with the specific speed lower than 80, the prior method is generally modified into a multi-stage split pump as shown in FIG. 2, so as to adjust the specific speed and improve the efficiency. However, obviously, the multi-stage split pump has a complex structure, high casting and processing difficulty and high production cost.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a single-stage single-suction horizontal split pump in order to overcome the defect that above-mentioned prior art exists, effectively improve than the rotational speed be less than the work efficiency of split pump in 80 hours to simple structure, compactness, casting processing is simple, low in production cost.
The purpose of the utility model can be realized through the following technical scheme:
the pump cover is installed on the pump seat to form a pump body, two ends of the rotor module penetrate out of the pump body, a water pressing chamber and a water suction chamber which are communicated with each other are arranged in the pump body, a suction inlet and a discharge outlet are respectively arranged on two sides of the pump seat, the suction inlet is connected with the water suction chamber, the discharge outlet is connected with the water pressing chamber, the rotor module comprises a single-suction impeller, the single-suction impeller is arranged in the water pressing chamber, an impeller inlet of the single-suction impeller is communicated with the water suction chamber, and an impeller outlet is communicated with the water pressing chamber.
Furthermore, the pumping chamber is of a semi-spiral volute structure.
Furthermore, the pressurized-water chamber is of a bent-tube volute structure.
Further, in the single suction impeller, the width b of an impeller outlet is 120% -150% of the designed outlet width b ', the wrap angle is 150-180 degrees, the placement angle of a blade outlet is 15-20 degrees, and the calculation expression of the designed outlet width b' is as follows:
b’=0.64*(ns/100)5/6*(Q/n)1/3
in the formula, ns is specific rotating speed, n is rotating speed, and Q is flow.
Furthermore, the single suction impeller is provided with a balance hole.
Further, the rotor module still include pivot and bearing unit, the pump body is worn out at the both ends of pivot, the single impeller that inhales install in the pivot, the pivot pass through the bearing unit and fix on the pump mount.
Furthermore, a mechanical seal shaft sleeve and a seal ring are arranged outside the rotating shaft and used for forming a small gap with the single suction impeller (31) to control volume loss and reduce pressure in the seal cavity.
Furthermore, a connecting key structure is arranged at one end of the rotating shaft and used for connecting an external driving device.
Furthermore, sealing rings are arranged between the single-suction impeller and the pump seat and between the single-suction impeller and the pump cover.
Further, the specific rotating speed of the single-stage single-suction horizontal split pump is less than 80.
Compared with the prior art, the utility model discloses following beneficial effect has:
1. the utility model designs a pump body structure of a pumping chamber and a suction chamber and a single-suction impeller to replace the traditional double-suction impeller, which can effectively improve the specific speed compared with the traditional single-stage double-suction split pump, thereby improving the working effect; meanwhile, the water suction chamber can also adopt a semi-spiral volute structure, so that the flow loss is less, and the efficiency is further improved.
2. The utility model discloses a single impeller of inhaling has adopted the impeller export of broad to adopt great cornerite and less blade export lay angle, make energy loss in the impeller littleer, efficient and high-efficient region wide in range.
3. The utility model discloses the mechanism is simple, compact, and casting processing is simple, and low in production cost and commonality are better.
4. The utility model discloses can also adopt simpler elbow formula suction chamber structure, do benefit to casting and processing more, reduction in production cost.
Drawings
Fig. 1 is a schematic structural diagram of a single-stage double-suction open pump.
Fig. 2 is a schematic structural view of a multistage split pump.
Fig. 3 is a schematic structural diagram of the present invention.
Fig. 4 is a schematic structural view of a rotor module.
Fig. 5 is a schematic top view of the pump base.
Fig. 6 is a side view of the pump base.
Fig. 7 is a schematic structural view of a flow passage in a single suction impeller.
Reference numerals: 1. the pump comprises a pump base, 11, a suction inlet, 12, a discharge outlet, 2, a pump cover, 3, a rotor module, 31, a single suction impeller, 32, a rotating shaft, 33, a bearing component, 4, a water suction chamber, 5, a water pressing chamber, 6, a sealing ring, 7, a mechanical seal shaft sleeve, 8, a connecting key structure, 9, a mechanical seal pressing cover, 10 and a mechanical seal water return pipe component.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. The embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
As shown in fig. 3 to 6, the present embodiment provides a single-stage single-suction horizontal split pump, which includes a pump base 1, a pump cover 2, and a rotor module 3. The pump cover 2 and the pump base 1 are connected together through a bolt assembly to form a pump body, and a water pumping chamber 5 and a water suction chamber 4 which are communicated with each other are arranged in the pump body. The pumping chamber 5 is in a semi-spiral volute structure. The two sides of the pump seat 1 are respectively provided with a suction inlet 11 and a discharge outlet 12, the suction inlet 11 is connected with the water suction chamber 4, and the discharge outlet 12 is connected with the water pumping chamber 5.
The rotor module 3 includes a single suction impeller 31, a rotating shaft 32 and a bearing member 33. Both ends of the rotating shaft 32 penetrate through the pump body, and the rotating shaft 32 is fixed on the pump base 1 through a bearing part 33. The bearing member 33 employs front and rear rolling bearings so that the rotary shaft 32 can rotate within the pump body. The single suction impeller 31 is installed on the rotating shaft 32, and the single suction impeller 31 is disposed in the pumping chamber 5 such that an inlet of the single suction impeller 31 communicates with the suction chamber 4 and an outlet of the impeller communicates with the pumping chamber 5. Meanwhile, sealing rings 6 are arranged between the single-suction impeller 31 and the pump base 1 and between the single-suction impeller 31 and the pump cover 2, so that the water suction chamber 4 and the water pressing chamber 5 are isolated from each other. The sealing ring 6 comprises a front sealing ring and a rear sealing ring, and the rear sealing ring is matched with a balance hole arranged on the single suction impeller 31 to play a role in balancing the axial force of the rotating shaft 32.
The rotating shaft 32 is externally provided with a sealing shaft sleeve 7 and a sealing ring 6 which are used for forming a small gap with the single suction impeller so as to control the volume loss and reduce the pressure in the sealing cavity. The machine seal pressing cover 9 is arranged at the position where the rotating shaft 32 extends out of the pump body, and the high-pressure water part in the water pressing chamber 5 is guided to a mechanical seal cavity in the machine seal pressing cover 9 through the machine seal return water pipe part 10, so that the washing and cooling effects are achieved. One end of the rotating shaft 32 is provided with a connecting key structure 8 for connecting an external driving device to drive the rotating shaft 32 to rotate. The single-suction impeller 31 and the mechanical seal shaft rotate together along with the rotating shaft 32, so that the single-stage single-suction horizontal split pump operates normally.
As shown in fig. 7, in the single suction impeller 31, the impeller outlet width b is 120% to 150%, preferably 140% of the design outlet width b ', where the calculation expression of the design outlet width b' is:
b’=0.64*(ns/100)5/6*(Q/n)1/3
in the formula, ns is specific rotating speed, n is rotating speed, and Q is flow.
The wrap angle is generally 150-180 degrees, preferably 135 degrees; the setting angle beta of the blade outlet is generally 15-20 degrees, and preferably 18 degrees. The single suction impeller 31 adopts a wider impeller outlet, and adopts a larger wrap angle and a smaller blade outlet placement angle, so that the energy loss in the impeller is smaller, the efficiency is high, and the high-efficiency area is wide.
The embodiment is particularly suitable for the single-stage single-suction horizontal split pump with the specific speed less than 80, the working efficiency is high, the cavitation is good through reasonable hydraulic design, the structure is simple and compact through reasonable structural design, and the defects that the single-stage double-suction split pump adopted when the specific speed is less than 80 in the existing split pump is low in efficiency, the multi-stage split pump is complex in structure and high in casting and processing difficulty are overcome.
In another embodiment, the water pumping chamber is of a bent-tube volute structure, so that casting and processing are facilitated, and production cost is reduced.
The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be devised by those skilled in the art in light of the teachings of the present invention without undue experimentation. Therefore, the technical solutions that can be obtained by a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection defined by the claims.

Claims (10)

1. The utility model provides a horizontal well open pump of single-stage single suction, includes pump seat (1), pump cover (2) and rotor module (3), pump cover (2) install and form the pump body on pump seat (1), rotor module (3) both ends wear out the pump body, its characterized in that, the pump body in be equipped with a pumping chamber (5) and a suction chamber (4) that communicate each other, pump seat (1) both sides be equipped with sunction inlet (11) and exhaut (12) respectively, sunction inlet (11) connect suction chamber (4), exhaut (12) connect pumping chamber (5), rotor module (3) include a single suction impeller (31), this single suction impeller (31) set up in pumping chamber (5), the impeller import of single suction impeller (31) communicates suction chamber (4), impeller export intercommunication pumping chamber (5).
2. The single-stage single-suction horizontal split pump as claimed in claim 1, wherein the pumping chamber (5) is of a semi-spiral volute structure.
3. The single-stage single-suction horizontal split pump as claimed in claim 1, wherein the pumping chamber (5) is of a bent-tube volute structure.
4. The single-stage single-suction horizontal split pump according to claim 1, wherein in the single-suction impeller (31), the width b of the outlet of the impeller is 120-150% of the designed outlet width b ', the wrap angle is 150-180 °, the placement angle of the outlet of the blade is 15-20 °, and the calculated expression of the designed outlet width b' is as follows:
b’=0.64*(ns/100)5/6*(Q/n)1/3
in the formula, ns is specific rotating speed, n is rotating speed, and Q is flow.
5. A single-stage single-suction horizontal split pump according to claim 1, wherein the single-suction impeller (31) is provided with a balance hole.
6. A single-stage single-suction horizontal split pump according to claim 1, wherein the rotor module (3) further comprises a rotating shaft (32) and a bearing part (33), both ends of the rotating shaft (32) penetrate through the pump body, the single-suction impeller (31) is installed on the rotating shaft (32), and the rotating shaft (32) is fixed on the pump base (1) through the bearing part (33).
7. The single-stage single-suction horizontal split pump according to claim 6, wherein the rotating shaft (32) is externally provided with a mechanical seal shaft sleeve (7) and a seal ring (6) for forming a clearance with the single-suction impeller (31).
8. A single-stage, single-suction, horizontal split pump according to claim 6, wherein the shaft (32) has a key structure (8) at one end for connection to an external drive.
9. The single-stage single-suction horizontal split pump according to claim 5, characterized in that sealing rings (6) are arranged between the single-suction impeller (31) and the pump base (1) and the pump cover (2).
10. The single-stage, single-suction, horizontal split pump according to claim 1, wherein the specific speed of the single-stage, single-suction, horizontal split pump is less than 80.
CN202021457073.0U 2020-07-22 2020-07-22 Single-stage single-suction horizontal split pump Active CN212717187U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202021457073.0U CN212717187U (en) 2020-07-22 2020-07-22 Single-stage single-suction horizontal split pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202021457073.0U CN212717187U (en) 2020-07-22 2020-07-22 Single-stage single-suction horizontal split pump

Publications (1)

Publication Number Publication Date
CN212717187U true CN212717187U (en) 2021-03-16

Family

ID=74908096

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202021457073.0U Active CN212717187U (en) 2020-07-22 2020-07-22 Single-stage single-suction horizontal split pump

Country Status (1)

Country Link
CN (1) CN212717187U (en)

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