Large-flow high-lift rotary shell pump

Abstract

A large-flow high-lift rotary shell pump comprises a horizontally-arranged pump body, an impeller assembly used for generating high-speed fluid is arranged in the pump body, a rotating hub assembly used for increasing the speed of the fluid is arranged on the left side of the impeller assembly, the right end of the impeller assembly is connected with an inlet rotating shaft, and the left end of the rotating hub assembly is connected with an outlet rotating shaft. A driving shaft is arranged on the front side of the inlet rotating shaft, a driving gear matched with a driven gear is arranged on the driving shaft, a liquid collecting disc assembly used for liquid pressurization is arranged in a cavity formed by the rotating hub assembly and the impeller assembly, a plurality of evenly-distributed liquid drainage holes are formed in a liquid collecting disc, and the flow of the pump is increased. The transmission assembly used for transmitting torque is arranged between the rotating hub assembly and the impeller assembly, the impeller assembly drives the catch tray to rotate reversely when rotating, reverse rotation of the catch tray assembly and the impeller assembly is achieved, the fluid suction speed of the catch tray is increased, and the lift of the pump is improved.

Description

Technical Field

[0001] The invention relates to the field of fluid machinery, in particular to a volute pump with large flow and high lift. Background Art

[0002] The volute pump is a single-stage, cantilever pump, which is currently mainly used in the fields of petrochemical, papermaking, food, etc., for conveying clean liquids or liquids containing solid particles. Since then, the volute pump has been more widely used due to its simple structure, small size, stable operation, low speed, good anti-cavitation performance, good sealing performance, and its good reputation in these fields and strong subsequent development.

[0003] The volute pumps currently on the market generally have the problems of small flow and slightly low head, and the conventional volute pumps have the problem of poor stability of the cantilever structure. Summary of the invention

[0004] The purpose of the present invention is to provide a volute pump with large flow and high head. On the one hand, it is to solve the problem of small flow and low head of volute pumps on the market and meet a wider market demand. On the other hand, it is to solve the problem of poor stability of the cantilever structure of conventional volute pumps and improve the reliability of equipment operation.

[0005] The technical solution of the present invention is as follows: a volute pump with large flow and high lift, comprising a horizontally arranged pump body, an impeller assembly for generating high-speed fluid is arranged in the pump body, a hub assembly for increasing fluid speed is arranged on the left side of the impeller assembly, an inlet shaft is connected to the right end of the impeller assembly, a driven gear for driving is mounted on the inlet shaft, an outlet shaft is connected to the left end of the hub assembly, the inlet shaft and the outlet shaft are respectively installed in the pump body through bearings, a drive shaft is arranged on the front side of the inlet shaft, a driving gear cooperating with the driven gear is arranged on the drive shaft, a liquid collecting pan assembly for liquid pressurization is arranged in the cavity formed by the hub assembly and the impeller assembly, the left end of the liquid collecting pan assembly is inserted into the outlet shaft, and a transmission assembly for transmitting torque is arranged between the hub assembly and the impeller assembly.

[0006] As a further technical solution, the hub assembly includes a hub body with a concave internal structure, an annular groove is opened in the circumferential direction of the inner side of the hub body, and a plurality of ribs for increasing the fluid rotation speed are arranged in the hub body on the left and right sides of the annular groove.

[0007] As a further technical solution, the liquid collecting tray assembly includes a vertically arranged liquid collecting tray, in which a plurality of drainage holes for fluid transportation are opened, a drainage pipe is connected to the left end of the liquid collecting tray, and a gear three for transmitting torque is connected to the right end of the liquid collecting tray, the inlet of each drainage hole is opened along the circumferential direction, and the outlets thereof are communicated with the inner hole of the drainage pipe.

[0008] As a further technical solution, the transmission assembly includes a vertically arranged mounting body, on which are mounted a plurality of gears 2 for transmitting torque, one end of the gear 2 being installed in the mounting body through a bearing, and each gear 2 being evenly distributed in the circumferential direction of the mounting body.

[0009] As a further technical solution, the impeller assembly includes a vertically arranged impeller, a plurality of flow channels for generating high-speed fluid are opened in the impeller, a guide body is installed at the center of the impeller to facilitate fluid suction, the left end of the guide body is a conical structure, a plurality of auxiliary blades are arranged on its conical annular surface, and a gear 1 is connected to the left end of the guide body.

[0010] As an optimization, an outlet flange and an inlet flange are respectively arranged on the left and right sides of the pump body, and an outlet end mechanical seal and an inlet end mechanical seal for sealing the fluid are respectively installed on the outlet flange and the inlet flange.

[0011] As an optimization, the liquid collecting tray assembly is installed in the outlet rotating shaft through a sliding bearing, thereby realizing the rotation and installation of the liquid collecting tray.

[0012] Beneficial effects of the present invention: 1. The liquid collecting tray is provided with multiple evenly distributed drainage holes, which increases the flow rate of the pump.

[0013] 2. A transmission assembly is arranged in the cavity, which drives the collecting plate to rotate in the opposite direction when the impeller assembly rotates, thereby realizing the reverse rotation of the collecting plate assembly and the impeller assembly, increasing the speed at which the collecting plate sucks in the fluid and improving the pump head.

[0014] 3. The liquid collecting tray assembly is installed in the outlet shaft through a sliding bearing, which realizes the rotation and installation of the liquid collecting tray. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a structural schematic diagram of the hub assembly of the present invention; Figure 3 It is a schematic structural diagram of the liquid collecting tray assembly of the present invention; Figure 4 It is a structural schematic diagram of the transmission assembly of the present invention; Figure 5 It is a schematic structural diagram of the impeller assembly of the present invention.

[0016] In the figure, 1 is the outlet flange, 2 is the outlet mechanical seal, 3 is the pump body, 4 is the outlet shaft, 5 is the hub assembly, 5-1 is the hub body, 5-2 is the rib plate, 5-3 is the annular groove, 6 is the liquid collecting plate assembly, 6-1 is the liquid collecting plate, 6-2 is the drain hole, 6-3 is the gear three, 6-4 is the drain pipe, 7 is the transmission assembly, 7-1 is the gear two, 7-2 is the mounting body, 8 is the impeller assembly, 8-1 is the impeller, 8-2 is the flow channel, 8-3 is the flow guide body, 8-4 is the gear one, 9 is the inlet shaft, 10 is the driven gear, 11 is the inlet mechanical seal, 12 is the inlet flange, 13 is the driving shaft, 14 is the driving gear, and 15 is the sliding bearing. DETAILED DESCRIPTION

[0017] A volute pump with large flow and high lift comprises a horizontally arranged pump body 3, an impeller assembly 8 for generating high-speed fluid is arranged in the pump body 3, a hub assembly 5 for increasing fluid speed is arranged on the left side of the impeller assembly 8, an inlet shaft 9 is connected to the right end of the impeller assembly 8, a driven gear 10 for driving is mounted on the inlet shaft 9, an outlet shaft 4 is connected to the left end of the hub assembly 5 corresponding to the inlet shaft 9, the inlet shaft 9 and the outlet shaft 4 are installed in the pump body 3 through bearings, a drive shaft 13 is arranged on the front side of the inlet shaft, A driving gear 14 is mounted on the driving shaft 13 corresponding to the driven gear 10, an outlet flange 1 and an inlet flange 12 are respectively arranged on the left and right sides of the pump body 3, an outlet end mechanical seal 2 and an inlet end mechanical seal 11 for sealing the fluid are respectively installed on the outlet flange 1 and the inlet flange 12, a liquid collecting pan assembly 6 for liquid pressurization is arranged in the hub assembly 5 and the impeller assembly 8, the left end of the liquid collecting pan assembly 6 is installed in the outlet shaft 4, and a transmission assembly 7 for transmitting torque is arranged between the hub assembly 5 and the impeller assembly 8.

[0018] The hub assembly 5 includes a hub body 5-1 with a concave internal structure. An annular groove 5-3 is provided on the inner circumferential direction of the hub body 5-1. A plurality of ribs 5-2 for increasing the fluid rotation speed are provided in the hub body 5-1 on the left and right sides of the annular groove 5-3.

[0019] The collecting tray assembly 6 includes a vertically arranged collecting tray 6-1, in which a plurality of drainage holes 6-2 for fluid transportation are opened, a drainage pipe 6-4 is connected to the left end of the collecting tray 6-1, and a gear 3 6-3 for transmitting torque is connected to the right end of the collecting tray 6-1. The inlet of each drainage hole 6-2 is opened along the circumferential direction, and the outlets thereof are communicated with the inner hole of the drainage pipe 6-4. The collecting tray assembly 6 is installed in the outlet shaft 4 through a sliding bearing 15, thereby realizing the rotation and installation of the collecting tray 6.

[0020] The impeller assembly 8 includes a vertically arranged impeller 8-1, a plurality of flow channels 8-2 for generating high-speed fluid are provided in the impeller 8-1, a flow guide 8-3 for facilitating fluid suction is installed at the center of the impeller 8-1, the left end of the flow guide 8-3 is a conical structure, a plurality of auxiliary blades are provided on its conical annular surface, and a gear 8-4 is connected to the left end of the flow guide 8-3.

[0021] The transmission assembly 7 includes a vertically arranged mounting body 7-2, on which a plurality of gears 7-1 for transmitting torque are mounted, one end of the gear 7-1 is inserted into the mounting body 7-2 through a bearing, and each gear 7-1 is evenly distributed in the circumferential direction of the mounting body 7-2.

[0022] Working principle: The fluid medium enters the inlet shaft 9 through the inlet flange 12, and then flows into the impeller assembly 8. After being accelerated and pressurized through the flow channel 8-2 in the impeller assembly 8, it enters the cavity. The rib plate 5-2 on the hub assembly 5 accelerates the fluid in the circumferential direction and then enters the drain hole 6-2 in the liquid collecting tray 6-1. After being pressurized through the drain hole 6-2, it is discharged from the drain pipe 6-4.

[0023] During operation, when the driving shaft 13 rotates, it drives the driven gear 10 to rotate through the driving gear 14, and then drives the inlet shaft 9 to rotate, and the inlet shaft 9 drives the impeller assembly 8 to rotate, and the gear one 8-1 on the impeller assembly 8 drives the gear two 7-1 to rotate, and then drives the gear three 6-3 to rotate through the gear two 7-2, and the direction of the gear three 6-3 is opposite to the rotation of the gear one 8-1, that is, the direction of the liquid collecting pan 6-1 is opposite to the direction of the impeller 8-1, thereby increasing the inlet flow rate of the liquid collecting pan 6-1 and increasing the pump head. At the same time, a plurality of drainage holes 6-2 are opened in the liquid collecting pan 6-1, which increases its suction flow and increases the flow rate of the pump.

Claims

1. A volute pump with large flow and high head, comprising a horizontally arranged pump body (3), wherein an impeller assembly (8) for generating high-speed fluid is arranged in the pump body (3), characterized in that: A hub assembly (5) for increasing fluid speed is arranged on the left side of the impeller assembly (8); an inlet shaft (9) is connected to the right end of the impeller assembly (8); a driven gear (10) for driving is mounted on the inlet shaft (9); an outlet shaft (4) is connected to the left end of the hub assembly (5); the inlet shaft (9) and the outlet shaft (4) are respectively mounted in the pump body (3) via bearings; a drive shaft (13) is arranged on the front side of the inlet shaft (9); a driving gear (14) cooperating with the driven gear (10) is arranged on the drive shaft (13); a liquid collecting tray assembly (6) for increasing liquid pressure is arranged in the cavity formed by the hub assembly (5) and the impeller assembly (8); the left end of the liquid collecting tray assembly (6) is inserted into the outlet shaft (4); and a transmission assembly (7) for transmitting torque is arranged between the hub assembly (5) and the impeller assembly (8).

2. A volute pump with large flow and high lift according to claim 1, characterized in that: The hub assembly (5) comprises a hub body (5-1) having a concave internal structure, an annular groove (5-3) being provided in the circumferential direction of the inner side of the hub body (5-1), and a plurality of ribs (5-2) for increasing the rotation speed of the fluid being provided in the hub body (5-1) on the left and right sides of the annular groove (5-3).

3. A volute pump with large flow and high lift according to claim 1, characterized in that: The liquid collecting tray assembly (6) comprises a vertically arranged liquid collecting tray (6-1), a plurality of drainage holes (6-2) for fluid transportation are provided in the liquid collecting tray (6-1), a drainage pipe (6-4) is connected to the left end of the liquid collecting tray (6-1), and a gear three (6-3) for transmitting torque is connected to the right end of the liquid collecting tray (6-1), the inlet of each drainage hole (6-2) is provided along the circumferential direction, and the outlet thereof is communicated with the inner hole of the drainage pipe (6-4).

4. A volute pump with large flow and high lift according to claim 1, characterized in that: The transmission assembly (7) comprises a vertically arranged mounting body (7-2), on which a plurality of gears (7-1) for transmitting torque are mounted, one end of the gear (7-1) being inserted into the mounting body (7-2) via a bearing, and each gear (7-1) being evenly distributed in the circumferential direction of the mounting body (7-2).

5. A volute pump with large flow and high lift according to claim 1, characterized in that: The impeller assembly (8) comprises a vertically arranged impeller (8-1), a plurality of flow channels (8-2) for generating high-speed fluid are provided in the impeller (8-1), a guide body (8-3) for facilitating fluid inhalation is installed at the center of the impeller (8-1), the left end of the guide body (8-3) is a conical structure, a plurality of auxiliary blades are provided on the conical annular surface, and a gear 1 (8-4) is connected to the left end of the guide body (8-3).

6. A volute pump with large flow and high lift according to any one of claims 1 to 5, characterized in that: An outlet flange (1) and an inlet flange (12) are respectively arranged on the left and right sides of the pump body (3), and an outlet end mechanical seal (2) and an inlet end mechanical seal (11) for sealing the fluid are respectively installed on the outlet flange (1) and the inlet flange (12).

7. A volute pump with large flow and high lift according to any one of claims 1 to 5, characterized in that: The liquid collecting tray assembly (6) is installed in the outlet rotating shaft (4) via a sliding bearing (15), thereby realizing the rotation and installation of the liquid collecting tray (6).

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