阅读说明：本技术 一种直连式立式双吸泵 (Vertical double entry pump of direct-connected type ) 是由 尤保健 芦洪钟 高超 刘慧娟 王凡 于 2020-05-21 设计创作，主要内容包括：本发明涉及一种直连式立式双吸泵,包括电机、第一紧固件、泵盖、泵体、叶轮、滑动轴承、轴、键、回水管部件、第二紧固件、进水段、上吸入室、蜗室、下吸入室、导水锥、挡板、出水段、止口；叶轮与电机为直连式结构,轴与叶轮之间通过键进行传动,叶轮固定在轴上；泵体内部安装有滑动轴承,轴的下端通过滑动轴承进行固定；进水段与上吸入室、下吸入室相连通；蜗室与上吸入室、下吸入室相连通；出水段与蜗室连通；在下吸入室的中部铸造有导水锥,在下吸入室靠近出水段的一侧铸造有挡板,蜗室与上吸入室连通的内壁上设置有止口。本发明占地面积小、节省空间、可以消除因联轴器传动造成的传递能量损耗,可以进一步提高机组的效率。(The invention relates to a direct-connected vertical double-suction pump which comprises a motor, a first fastening piece, a pump cover, a pump body, an impeller, a sliding bearing, a shaft, a key, a backwater pipe part, a second fastening piece, a water inlet section, an upper suction chamber, a volute chamber, a lower suction chamber, a water guide cone, a baffle, a water outlet section and a spigot, wherein the first fastening piece is arranged on the pump cover; the impeller and the motor are in a direct connection structure, the shaft and the impeller are driven by a key, and the impeller is fixed on the shaft; a sliding bearing is arranged in the pump body, and the lower end of the shaft is fixed through the sliding bearing; the water inlet section is communicated with the upper suction chamber and the lower suction chamber; the volute chamber is communicated with the upper suction chamber and the lower suction chamber; the water outlet section is communicated with the volute chamber; a water guide cone is cast in the middle of the lower suction chamber, a baffle is cast on one side of the lower suction chamber close to the water outlet section, and a spigot is arranged on the inner wall of the volute chamber communicated with the upper suction chamber. The invention has small floor area, saves space, can eliminate the transmission energy loss caused by the transmission of the coupler and can further improve the efficiency of the unit.)

1. A direct-connected vertical double-suction pump; the method is characterized in that: the vertical double entry pump of direct-connected type includes: the water pump comprises a motor, a first fastening piece, a pump cover, a pump body, an impeller, a sliding bearing, a shaft, a key, a backwater pipe part, a second fastening piece, a water inlet section, an upper suction chamber, a volute chamber, a lower suction chamber, a water guide cone, a baffle, a water outlet section and a spigot;

the motor is connected with the pump cover through a first fastener; the pump cover is connected with the pump body through a second fastening piece; the impeller and the motor are in a direct connection structure and share a shaft; the shaft and the impeller are driven by a key, and the impeller is fixed on the shaft; a sliding bearing is arranged in the pump body, and the lower end of the shaft is fixed through the sliding bearing; a backwater pipe part is arranged at a position close to the outlet of the pump body;

the water inlet section is communicated with the upper suction chamber and the lower suction chamber; the volute chamber is communicated with the upper suction chamber and the lower suction chamber; the water outlet section is communicated with the volute chamber; a water guide cone is cast in the middle of the lower suction chamber, a baffle is cast on one side of the lower suction chamber close to the water outlet section, and a spigot is arranged on the inner wall of the volute chamber communicated with the upper suction chamber.

2. The direct-connected vertical double suction pump according to claim 1, wherein a first sealing ring is arranged between the pump body and the impeller, and a second sealing ring is arranged between the pump cover and the impeller; an O-shaped sealing ring is arranged between the pump cover and the pump body; a water retaining ring is arranged below the motor.

3. The direct connection type vertical double suction pump according to claim 1, wherein the shaft and the impeller are locked and fixed by a locking nut.

4. The direct connection type vertical double suction pump according to claim 2, wherein the outer diameter of the water retaining ring is 15-30mm larger than the inner diameter, and the thickness is 5-15 mm.

5. The direct connection vertical double suction pump according to claim 1, wherein the first fastening member has a specification of M16 or a number of 4 or 8.

6. The direct connection vertical double suction pump according to claim 2, wherein the first sealing ring has a thickness in the range of: 20-50mm, width range: 10-15 mm.

7. The direct-connected vertical double suction pump according to claim 2, wherein the second sealing ring is cast integrally with the pump cover, and is connected with the pump cover through two reinforcing ribs, and the thickness range of the second sealing ring is 30-70mm, and the width range of the second sealing ring is 40-100 mm.

8. The direct connection type vertical double suction pump as claimed in claim 2, wherein the cross-sectional diameter of the O-ring is 7mm, and the inner diameter is 410 mm and 570 mm.

9. The direct-connected vertical double suction pump according to claim 1, wherein a serrated pressure relief groove is machined on the spigot; the depth and width range of the pressure relief groove are as follows: 0.8-1.5 mm.

10. The direct connection vertical double suction pump according to claim 1, wherein the thickness range of the baffle is: 15-30 mm.

Technical Field

The invention relates to a double suction pump, in particular to a direct-connected vertical double suction pump which occupies a small area, saves space, can eliminate the transmission energy loss caused by the transmission of a coupler and can further improve the efficiency of a unit.

Background

In general machinery, pump products are large in power consumption, so that under the environment of energy conservation and emission reduction, if the efficiency of a water pump can be improved, a large amount of electric energy consumption can be saved, and the aims of energy conservation and consumption reduction are fulfilled. The specific speed is an important parameter of the water pump and reflects the relationship among the flow rate, the rotating speed and the lift of the water pump. For a centrifugal pump, when the specific rotating speed is within a certain range, the efficiency is high, and if the specific rotating speed is too high or too low, the efficiency of the water pump is reduced. Therefore, if the single-stage single-suction centrifugal pump with higher specific speed is designed into the single-stage double-suction centrifugal pump with moderate specific speed, the efficiency of the water pump can be improved to a certain extent, and the purposes of energy conservation and emission reduction are achieved.

Disclosure of Invention

In view of the above problems, the main object of the present invention is to provide a direct-coupled vertical double suction pump which occupies a small area, saves space, can eliminate the energy loss caused by the transmission of a coupler, and can further improve the efficiency of a unit.

The invention solves the technical problems through the following technical scheme: a direct-connected vertical double-suction pump; the vertical double entry pump of direct-connected type includes: the water pump comprises a motor, a first fastening piece, a pump cover, a pump body, an impeller, a sliding bearing, a shaft, a key, a backwater pipe part, a second fastening piece, a water inlet section, an upper suction chamber, a volute chamber, a lower suction chamber, a water guide cone, a baffle, a water outlet section and a spigot.

The motor is connected with the pump cover through a first fastener; the pump cover is connected with the pump body through a second fastening piece; the impeller and the motor are in a direct connection structure and share a shaft; the shaft and the impeller are driven by a key, and the impeller is fixed on the shaft; a sliding bearing is arranged in the pump body, and the lower end of the shaft is fixed through the sliding bearing; a backwater pipe part is arranged at the position close to the outlet of the pump body.

The water inlet section is communicated with the upper suction chamber and the lower suction chamber; the volute chamber is communicated with the upper suction chamber and the lower suction chamber; the water outlet section is communicated with the volute chamber; a water guide cone is cast in the middle of the lower suction chamber, a baffle is cast on one side of the lower suction chamber close to the water outlet section, and a spigot is arranged on the inner wall of the volute chamber communicated with the upper suction chamber.

In a specific embodiment of the present invention: a first sealing ring is arranged between the pump body and the impeller, and a second sealing ring is arranged between the pump cover and the impeller; an O-shaped sealing ring is arranged between the pump cover and the pump body; a water retaining ring is arranged below the motor.

In a specific embodiment of the present invention: and the shaft and the impeller are locked and fixed through a locking nut.

In a specific embodiment of the present invention: the outer diameter of the water retaining ring is 15-30mm larger than the inner diameter, and the thickness of the water retaining ring is 5-15 mm.

In a specific embodiment of the present invention: the first fastener has a specification of M16 or a number of 4 or 8.

In a specific embodiment of the present invention: the thickness range of the first sealing ring is as follows: 20-50mm, width range: 10-15 mm.

In a specific embodiment of the present invention: the second sealing ring and the pump cover are cast into a whole, the second sealing ring and the pump cover are connected through two reinforcing ribs, the thickness range of the second sealing ring is 30-70mm, and the width range of the second sealing ring is 40-100 mm.

In a specific embodiment of the present invention: the cross section diameter of the O-shaped sealing ring is 7mm, and the inner diameter is 410 and 570 mm.

In a specific embodiment of the present invention: a serrated pressure relief groove is processed on the spigot; the depth and width range of the pressure relief groove are as follows: 0.8-1.5 mm.

In a specific embodiment of the present invention: the thickness range of the baffle is as follows: 15-30 mm.

The positive progress effects of the invention are as follows: the direct-connected vertical double-suction pump provided by the invention has the following advantages: the vertical double-suction pump is in a direct connection mode, the vertical double-suction pump is not in a direct connection mode, similar products are generally provided with couplers, and the couplers are omitted.

The invention processes the sawtooth-shaped pressure relief groove on the spigot, casts the water guide cone in the middle of the lower suction chamber, casts the baffle plate on one side of the lower suction chamber close to the water outlet section, and designs the water inlet section into the cone shape, thus increasing the flow area and reducing the flow speed, thereby reducing the hydraulic loss and improving the efficiency.

The invention has small floor area, saves space, can eliminate the transmission energy loss caused by the transmission of the coupler and can further improve the efficiency of the unit.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a partially enlarged view of fig. 1.

Fig. 3 is a schematic structural view (a) of the seam allowance of fig. 1 and 2, wherein a serrated pressure relief groove is formed in the seam allowance.

The following are the names corresponding to the reference numbers in the invention:

the water pump comprises a motor 1, a water retaining ring 2, a first fastening piece 3, a pump cover 4, a pump body 5, an impeller 6, a first sealing ring 7, a sliding bearing 8, a shaft 9, a locking nut 10, a key 11, a water return pipe part 12, a second sealing ring 13, a second fastening piece 14, an O-shaped sealing ring 15, a water inlet section 16, an upper suction chamber 17, a volute chamber 18, a lower suction chamber 19, a water guide cone 20, a baffle 21, a water outlet section 22, a spigot 23 and a pressure relief groove 24.

Detailed Description

The following provides a detailed description of the preferred embodiments of the present invention with reference to the accompanying drawings.

The invention provides a direct-connected vertical double suction pump, wherein fig. 1 is a schematic overall structure diagram of the direct-connected vertical double suction pump, fig. 2 is a partially enlarged view of fig. 1, fig. 3 is a schematic structural diagram (a position) of a seam allowance with a sawtooth-shaped pressure relief groove processed in fig. 1 and fig. 2, and as shown in fig. 1-3, the direct-connected vertical double suction pump provided by the invention comprises: the water pump comprises a motor 1, a water retaining ring 2, a first fastening piece 3, a pump cover 4, a pump body 5, an impeller 6, a first sealing ring 7, a sliding bearing 8, a shaft 9, a locking nut 10, a key 11, a water return pipe part 12, a second sealing ring 13, a second fastening piece 14, an O-shaped sealing ring 15, a water inlet section 16, an upper suction chamber 17, a volute chamber 18, a lower suction chamber 19, a water guide cone 20, a baffle 21, a water outlet section 22 and a spigot 23.

The water inlet section 16 is communicated with the upper suction chamber 17 and the lower suction chamber 19; the volute chamber 18 is communicated with the upper suction chamber 17 and the lower suction chamber 19; the water outlet section 16 is communicated with the volute chamber 18; a water guide cone 20 is cast in the middle of the lower suction chamber 19, a baffle 21 is cast on one side of the lower suction chamber 19 close to a water outlet section 22, and a spigot 23 is arranged on the inner wall of the volute chamber 18 communicated with the upper suction chamber 17.

The motor 1 is connected with the pump cover 4 through a first fastener 3; the pump cover 4 is connected with the pump body 5 through a second fastening piece 14; the impeller 6 and the motor 1 are in a direct connection structure and share a shaft 9; the shaft 9 and the impeller 6 are driven by a key 11, and the shaft 9 and the impeller 6 are locked and fixed by a locking nut 10; a sliding bearing 8 is arranged in the pump body 5, and the lower end of the shaft 9 is fixed through the sliding bearing 8 so as to prevent the pump shaft from swinging during operation; a first sealing ring 7 is arranged between the pump body 5 and the impeller 6, a second sealing ring 13 is arranged between the pump cover 4 and the impeller 6, and the two sealing rings have the function of reducing the leakage of high-pressure water in the pump body to the inlet of the impeller; a return pipe member 12 is provided adjacent the outlet of the pump body and serves to direct the high pressure water in the pump body to the location of the mechanical seal 16 for lubricating and cooling the mechanical seal; an O-shaped sealing ring 15 is arranged between the pump cover 4 and the pump body 5 to prevent high-pressure water in the pump body from leaking along a gap between the pump body and the pump cover; a water retaining ring 2 is arranged below the motor 1, and the function of the water retaining ring is to prevent a small amount of liquid leaked from the mechanical seal 16 from entering the interior of the motor along the shaft.

A serrated pressure relief groove is processed on the spigot; a serrated pressure relief groove 24 is processed on the spigot 23; the depth and width range of the pressure relief groove are as follows: 0.8-1.5 mm. The thickness range of the baffle 21 is: 15-30 mm.

The pressure relief groove 24 is used for reducing the leakage of high-pressure water in the volute chamber into the upper suction chamber along the seam allowance, so that the leakage loss can be reduced, and the volume efficiency can be improved.

The thickness and the size of the water retaining ring 2 are changed along with the thickness of the shaft diameter, the cross section of the inner diameter of the water retaining ring 2 is arc-shaped so as to ensure that the water retaining ring is tightly matched with the shaft, the outer diameter is 15-30mm larger than the inner diameter, and the thickness is 5-15 mm.

The first fastening pieces 3 have the specification of M16 or M20, the number of the first fastening pieces is 4 or 8, and the number and the size are determined according to the power of the motor.

The first sealing ring 7 is made of heat-treated wear-resistant materials, and the thickness range of the first sealing ring is 20-50mm, and the width range of the first sealing ring is 10-15 mm.

According to the invention, the locknut 10 is made of stainless steel, so that the problem that the locknut is difficult to disassemble due to rusting and shaft locking can be prevented, the locknut is completely provided with fine threads to increase the locking capacity, the thread pitch is 2mm, and the thread diameter is slightly smaller than the shaft diameter so as to ensure convenient installation.

In the invention, the keys 11 are all made of stainless steel, the specification and size of the keys are changed along with the size of the shaft diameter, the width range is 16-22mm, the height range is 10-14mm, and the length is 85 mm.

The function of return pipe part 12 is to guide the high pressure water at the pump body exit to the position of mechanical seal and wash mechanical seal to prevent that mechanical seal from doing the friction and causing the damage, and return pipe part 12 is the flexible metal hose, and the internal diameter is 12 mm.

The second sealing ring 13 and the pump cover 4 are cast into a whole, and are connected through two reinforcing ribs, so that the assembly is convenient, the thickness range is 30-70mm, and the width range is 40-100 mm.

The specification of the second fastener 14 is M16, the number of the second fasteners is 8 or 12, and the number of the second fasteners changes with the diameter of the impeller;

the O-shaped sealing ring 15 is made of rubber II-2, the cross section diameter is 7mm, the inner diameter is 410-570mm, and the size of the inner diameter is changed along with the size of the diameter of the impeller.

The serrated pressure relief groove is formed in the spigot, so that the leakage loss of the working medium can be reduced; the water guide cone is cast in the middle of the lower suction chamber to play a role in guiding water, so that hydraulic loss is reduced; a baffle is cast at one side of the lower suction chamber close to the water outlet section to prevent vortex from forming at the inlet of the impeller; the water inlet section is designed into a conical shape, so that the flow area can be increased, the flow speed can be reduced, the hydraulic loss can be reduced, and the efficiency can be improved.

The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the present invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined by the appended claims and their equivalents.