CN218467938U - Direct-connected rotary jet pump - Google Patents

Abstract

The utility model discloses a direct-coupled type spouts pump soon draws together the pump body, rotor part, pressure manifold and drive arrangement, and rotor part installs on the pump body. The driving device is a variable frequency motor directly connected with the rotor part. The rotor portion includes a shaft sleeve, an impeller, and a rotor housing. The right end surface of the impeller is circumferentially provided with a groove with a rectangular cross section, and the groove comprises a bending section and a straight line section connected with the outer end of the bending section. The input section of the collecting pipe is in a shape gradually increased from top to bottom, the cross section of the input section of the collecting pipe is in a water-drop shape, and one end of an arc of the water-drop shape is positioned at the same side as the inlet of the collecting pipe; the wall thickness of the pipe wall of the input section on the same side as the inlet is consistent from top to bottom. The utility model discloses an associated mode structure to the runner shape of rotor, the shape structure of pressure manifold have made the improvement, have simple structure, small, with low costs, hydraulic efficiency is high, stability advantage such as good.

Description

Direct-connected rotary jet pump

Technical Field

The utility model relates to a spout the pump field soon, concretely relates to pump device is spouted soon of motor direct connection.

Background

With the rapid development of industrial technologies in recent years, the demand of small-flow high-lift pumps in the industries of petrochemical industry, metallurgy, mining and the like is increasing. The traditional centrifugal pump, reciprocating pump, non-leakage pump and the like have higher maintenance cost due to unstable performance and can not meet the requirement of gradually improved working conditions. The rotary jet pump (namely the rotary jet pump) has the characteristics of simple structure, stable operation and good adaptability to the working conditions of small flow and high lift, and is widely applied to the fields.

The rotary jet pump used in the current industrial production mainly comprises a rotor part which is driven by a motor through a gearbox to rotate and a collecting pipe which extends into the inner cavity of the rotor part. The rotor part is provided with an impeller which is provided with a runner with a groove structure. Along with the high-speed rotation of the rotor part, fluid flows along the flow channel under the action of centrifugal force to form negative pressure, the external fluid is continuously sucked into the inner cavity of the rotor part and then is output outwards along the collecting pipe, and the pumping of the fluid is realized.

The existing rotary spraying pump has the following defects: 1. the flow regulation is realized by a gearbox, but the gearbox is large in size and high in cost and needs to be maintained regularly; 2. the outlet angle of the impeller flow channel is small, and the hydraulic efficiency is low; 3. the cross section of the collecting pipe is mostly of a symmetrical structure, and is continuously impacted by high-speed fluid in a rotor cavity, so that the flow loss is large, the stress is uneven, and the working efficiency and the stability are influenced; 4. the strength of a collecting pipe casting is poor, particularly, the side wall close to an inlet is a main area for bearing impact force, and is also a weak point of strength, so that the collecting pipe casting is easy to break and fail after long-time work; 5. before assembly, the rotor part needs to be subjected to dynamic balance processing, because one end of the rotor part, which is connected with the driving shaft, is of a closed structure, the rotor part can only be operated on a vertical dynamic balancing machine, the measurement result is inaccurate, the dismounting and mounting operation is complex, and particularly when the diameter/length ratio of the rotor part is less than 6, double-sided de-weighting and repeated dismounting are needed, the consumed time is long, and the production efficiency is low.

SUMMERY OF THE UTILITY MODEL

The utility model provides a associated mode spouts pump soon, its purpose: (1) The problems of large size, high cost and large maintenance workload caused by using a gearbox are solved; (2) improving hydraulic efficiency; (3) The shape of the collecting pipe is improved, and the working efficiency and the stability are improved; (4) The problems of high casting difficulty and insufficient strength of the collecting pipe are solved; and (5) improving the operation efficiency of dynamic balance.

The utility model discloses technical scheme as follows:

a direct-connected jet grouting pump comprises a pump body, a rotor part, a collecting pipe and a driving device, wherein the rotor part is arranged on the pump body, the driving device is used for driving the rotor part to rotate around a horizontal axis relative to the pump body, and the collecting pipe extends into the rotor part;

the pump body comprises an inlet and outlet section, a shell cover, a connecting body and a connecting flange which are sequentially connected from left to right; the connecting body is cylindrical;

the water inlet and outlet section is provided with a water outlet and a water inlet;

the shell cover is provided with a static ring seat;

the rotor part comprises a shaft sleeve, an impeller and a rotor shell which are sequentially connected from left to right; the shaft sleeve penetrates through the static ring seat; the impeller and the rotor shell enclose a rotor inner cavity, and the impeller and the rotor shell are positioned in a space enclosed by the shell cover, the connecting body and the connecting flange; a groove with a rectangular cross section is circumferentially distributed on the right end face of the impeller, and the groove comprises a bent section and a straight line section connected with the outer end of the bent section; the inner end of the bending section is communicated with an inner hole of the shaft sleeve; the rotor part also comprises a wheel cover which is positioned in the inner cavity of the rotor and is arranged on the right end surface of the impeller, and the wheel cover and the groove form a flow channel; the outer edge of the wheel cover is also provided with an opening opposite to the straight line section;

the inner cavity of the rotor is communicated with the water outlet through a collecting pipe; the collecting pipe comprises an input section, a turning section and an output section; the input section is vertically arranged in the inner cavity of the rotor, and the lower end of the input section is connected with the turning section; the upper end of the input section is provided with an inlet facing to the side; the input section is in a shape gradually increasing from top to bottom, the cross section of the input section is in a drop shape, and one end of an arc of the drop shape is positioned at the same side with the inlet of the collecting pipe; the wall thickness of the pipe wall of the input section and the pipe wall of the pipe wall on the same side of the inlet are kept consistent from top to bottom; the turning section penetrates through the wheel cover; the output section of the collecting pipe penetrates through the shaft sleeve, the left end of the collecting pipe is fixedly connected with the inlet and outlet section, and the right end of the collecting pipe is connected with the turning section; the gap between the output section and the shaft sleeve is communicated with the water inlet;

the driving device is a variable frequency motor; the variable frequency motor is installed on the connecting flange, and an output shaft of the variable frequency motor is connected with the right end of the rotor shell through a coupler.

As a further improvement of the direct-connected rotary jet pump: the rotor comprises a rotor shell and is characterized in that a through hole is formed in the right end of the rotor shell, an end cover is installed in the through hole, and a sealing ring is installed between the end cover and the through hole.

As a further improvement of the direct-connected rotary jet pump: the center hole of the wheel cover is internally provided with a detachable lining, and the turning section of the collecting pipe is matched with the lining.

As a further improvement of the direct-connected rotary jet pump: and a sealing assembly is arranged between the static ring seat and the shaft sleeve.

Compared with the prior art, the utility model discloses following beneficial effect has: (1) The device adopts a motor direct-coupled structure, the rotor part is directly driven by the variable frequency motor, and the adjustment of the rotating speed is realized in a variable frequency mode, so that the traditional gearbox is omitted, and the problems of large size, high cost, large maintenance workload and the like caused by the gearbox are solved; (2) The flow channel is of a structure of bending first and then straightening, and the rectangular section is adopted, so that the mechanical processing is facilitated, the fluid passing performance is improved, the outlet angle is close to 90 degrees, the higher linear speed can be generated, and the flow capacity and the hydraulic efficiency of the pump are improved; (3) The input section of the collecting pipe adopts a gradual change type structure with a water drop-shaped cross section, so that the impact force can be obviously reduced, the stress is more uniform, and the working efficiency and the stability are improved; (4) The side, close to the inlet, of the input section of the collecting pipe is designed to have the same wall thickness, so that the casting difficulty is reduced, and the structural strength of the collecting pipe is ensured; (5) The through hole has been seted up to rotor housing's right-hand member, installs the end cover in the through hole, before the assembly, can use the dabber to pass rotor housing, puts it at horizontal dynamic balancing machine and carries out dynamic balance, for using vertical dynamic balancing machine, the precision is higher, and loading and unloading operation is more convenient, and during product assembly, can guarantee the leakproofness of rotor inner chamber through the installation end cover.

Drawings

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

FIG. 2 is a perspective view of the impeller;

FIG. 3 is a left side view of the impeller;

FIG. 4 isbase:Sub>A sectional view taken along line A-A of FIG. 3;

FIG. 5 is a schematic view of the construction of the wheel cover and hub portion;

FIG. 6 is a perspective view of the manifold;

FIG. 7 is a cross-sectional view of a manifold;

FIG. 8 is a cross-sectional view of the inlet section of the manifold;

FIG. 9 is a cross-sectional view taken at B-B of FIG. 8;

FIG. 10 is a cross-sectional view taken at C-C of FIG. 8;

FIG. 11 is a cross-sectional view taken at D-D of FIG. 8;

fig. 12 is a schematic structural view of the rotor portion and the coupling portion with the end cover portion removed, and this state is mainly used for dynamic balancing.

Detailed Description

The technical scheme of the utility model is explained in detail below with the attached drawings:

referring to fig. 1, a direct-coupled rotary jet pump includes a pump body, a rotor portion, a collecting pipe 11 and a driving device.

Specifically, the pump body includes inlet and outlet port section 1, cap 4, connector 6 and flange 7 that link to each other in proper order from left to right. The connecting body 6 is cylindrical, and a cavity for placing the rotor part is formed by the connecting body, the shell covers 4 on two sides and the connecting flange 7.

The water inlet and outlet section 1 is provided with a water outlet 1-1 and a water inlet 1-2.

And a stationary ring seat 3 is arranged at the central hole of the shell cover 4. And a sealing assembly 15 is arranged between the static ring seat 3 and the shaft sleeve 2.

The rotor part comprises a shaft sleeve 2, an impeller 14 and a rotor shell 5 which are connected in sequence from left to right. The shaft sleeve 2 penetrates through the static ring seat 3. The impeller 14 and the rotor housing 5 enclose a rotor cavity, and the impeller and the rotor housing are positioned in a space enclosed by the housing cover 4, the connecting body 6 and the connecting flange 7.

Specifically, as shown in fig. 2, 3 and 4, grooves with rectangular cross sections are circumferentially distributed on the right end face of the impeller 14, the rectangular cross sections facilitate machining, and the fluid permeability can be increased. Further, the groove includes an S-shaped curved section 14-1 and a straight section 14-2 connected to an outer end of the curved section 14-1. The straight line segment 14-2 can make the outlet angle close to 90 degrees, generate higher linear velocity and improve the flow capacity and hydraulic efficiency of the pump. The inner end of the curved section 14-1 communicates with the inner bore of the sleeve 2, from which fluid is to be introduced.

As shown in fig. 1 and 5, the rotor part further comprises a wheel cap 13 positioned in the inner cavity of the rotor and mounted on the right end face of the impeller 14, and the wheel cap 13 and the groove on the impeller 14 define a flow passage for fluid to pass through. The outer edge of the wheel cover 13 is also provided with an opening 13-1 opposite to the position of the straight line section 14-2, and the opening 13-1 is an outlet of the flow passage.

Further, a replaceable bush 12 is installed in a central hole of the wheel cover 13. The bush 12 is fixed at the center hole of the wheel cover 13 by a set screw.

The inner cavity of the rotor is also communicated with the water outlet 1-1 through a collecting pipe 11.

Specifically, as shown in fig. 6 and 7, the header 11 is generally L-shaped and includes an inlet section 11-2, a turn section 11-3, and an outlet section 11-4. The input section 11-2 is vertically arranged in the inner cavity of the rotor, and the lower end of the input section is connected with the turning section 11-3. The upper end of the input section 11-2 is provided with an inlet 11-1 facing to the side. Further, as shown in fig. 8-11, the input section 11-2 has a shape gradually increasing from top to bottom, and the cross-sectional shape is a drop shape. One end of the arc of the drop shape is positioned at the same side with the inlet 11-1 of the collecting pipe 11. The shape can obviously reduce the impact on the collecting pipe 11 when the rotor part rotates, the stress is more uniform, and the working efficiency and the stability are improved. The wall thickness of the pipe wall of the input section 11-2 on the same side as the inlet 11-1 is kept consistent from top to bottom, so that the casting difficulty is reduced, and the structural strength of the collecting pipe 11 is ensured.

As shown in fig. 1, the turning section 11-3 passes through the wheel cover 13 and is fitted into the inner hole of the bushing 12. Because bush 12 is detachable, consequently to the pressure manifold 11 and the operating mode of difference, can change the bush 12 of different materials, size, utilize the Lomakin effect (Lomakin effect) that the small clearance between pressure manifold 11 and the bush 12 formed, play the supporting role to the rotor, compromise operating efficiency and stability.

The output section 11-4 of the collecting pipe 11 penetrates through the shaft sleeve 2, the left end of the collecting pipe is fixedly connected with the inlet and outlet section 1, and the right end of the collecting pipe is connected with the turning section 11-3. The annular gap between the output section 11-4 and the shaft sleeve 2 is communicated with the water inlet 1-2. The left end of the output end is used as the outlet of the collecting pipe 11 and is directly communicated with the water outlet 1-1 of the inlet and outlet section 1.

The driving device is used for driving the rotor part to rotate around a horizontal axis relative to the pump body. In this embodiment, the driving device is a variable frequency motor 8, which is mounted on the connecting flange 7, and the output shaft is in transmission connection with the coupling 9 through a key. The left end of the coupling 9 is connected with the right end of the rotor housing 5 through a bolt.

Further, as shown in fig. 1 and 12, a through hole is formed at the right end of the rotor housing 5, an end cover 10 is installed in the through hole, and a sealing ring is installed between the end cover 10 and the through hole.

As shown in fig. 12, the rotor sections need to be dynamically balanced prior to assembly. The end cap 10 can now be removed and then threaded through the rotor section using a mandrel and then mounted on the horizontal dynamic balancing machine. Compared with the vertical dynamic balancing machine, the horizontal dynamic balancing machine has the advantages of more accurate measurement result and higher operation efficiency. After dynamic balancing, the end cap 10 and seal ring are reattached to the right end of the rotor housing 5.

When the variable-frequency motor works, the variable-frequency motor 8 drives the rotor part to rotate at a high speed, negative pressure is generated at the position of the flow channel under the action of centrifugal force, fluid continuously enters from the water inlet 1-2, flows outwards along the flow channel, enters the inner cavity of the rotor from the opening 13-1, and is finally output outwards along the collecting pipe 11, and pumping of the fluid is achieved. In the pumping process, the rotating speed of the variable frequency motor 8 can be adjusted according to the working condition, the adjustment of technical parameters such as flow and lift is realized, and products with different technical parameters are obtained by adjusting the size of the inlet 11-1.

Claims (4)

1. The utility model provides an associated mode spouts pump soon, includes the pump body, rotor part, pressure manifold (11) and drive arrangement, rotor part installs on the pump body, drive arrangement is used for driving rotor part and rotates around the horizontally axis for the pump body, pressure manifold (11) stretch into inside the rotor part, its characterized in that:

the pump body comprises an inlet and outlet section (1), a shell cover (4), a connecting body (6) and a connecting flange (7) which are sequentially connected from left to right; the connecting body (6) is cylindrical;

a water outlet (1-1) and a water inlet (1-2) are formed in the inlet and outlet section (1);

the shell cover (4) is provided with a static ring seat (3);

the rotor part comprises a shaft sleeve (2), an impeller (14) and a rotor shell (5) which are connected in sequence from left to right; the shaft sleeve (2) penetrates through the static ring seat (3); the impeller (14) and the rotor shell (5) enclose a rotor inner cavity, and the impeller and the rotor inner cavity are positioned in a space enclosed by the shell cover (4), the connecting body (6) and the connecting flange (7); grooves with rectangular cross sections are circumferentially distributed on the right end face of the impeller (14), and each groove comprises a bent section (14-1) and a straight line section (14-2) connected with the outer end of the bent section (14-1); the inner end of the bending section (14-1) is communicated with an inner hole of the shaft sleeve (2); the rotor part also comprises a wheel cover (13) which is positioned in the inner cavity of the rotor and is arranged on the right end surface of the impeller (14), and the wheel cover (13) and the groove form a flow channel; the outer edge of the wheel cover (13) is also provided with an opening (13-1) opposite to the position of the straight line section (14-2);

the inner cavity of the rotor is communicated with the water outlet (1-1) through a collecting pipe (11); the collecting pipe (11) comprises an input section (11-2), a turning section (11-3) and an output section (11-4); the input section (11-2) is vertically arranged in the inner cavity of the rotor, and the lower end of the input section is connected with the turning section (11-3); the upper end of the input section (11-2) is provided with an inlet (11-1) facing to the side; the input section (11-2) is in a shape gradually increasing from top to bottom, the cross section of the input section is in a drop shape, and one end of an arc of the drop shape is positioned at the same side as the inlet (11-1) of the collecting pipe (11); the wall thickness of the pipe wall on the same side of the input section (11-2) and the inlet (11-1) is kept consistent from top to bottom; the turning section (11-3) penetrates through the wheel cover (13); an output section (11-4) of the collecting pipe (11) penetrates through the shaft sleeve (2), the left end of the collecting pipe is fixedly connected with the inlet and outlet section (1), and the right end of the collecting pipe is connected with the turning section (11-3); the gap between the output section (11-4) and the shaft sleeve (2) is communicated with the water inlet (1-2);

the driving device is a variable frequency motor (8); the variable frequency motor (8) is installed on the connecting flange (7), and an output shaft of the variable frequency motor is connected with the right end of the rotor shell (5) through a coupler (9).

2. The direct-coupled rotary jet pump of claim 1, wherein: the rotor comprises a rotor shell (5) and is characterized in that a through hole is formed in the right end of the rotor shell (5), an end cover (10) is installed in the through hole, and a sealing ring is installed between the end cover (10) and the through hole.

3. The direct-coupled rotary jet pump of claim 1, wherein: the wheel cover is characterized in that a detachable lining (12) is installed in a central hole of the wheel cover (13), and a turning section (11-3) of the collecting pipe (11) is matched with the lining (12).

4. The direct-coupled rotary jet pump of any one of claims 1 to 3, wherein: and a sealing assembly (15) is arranged between the static ring seat (3) and the shaft sleeve (2).

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