Horizontal precipitation machine

Abstract

The invention discloses a horizontal precipitation machine which comprises a base (1), a three-phase motor (2) and a shell (3) are arranged on the base (1), a shaft body (4) connected with the output end of the three-phase motor (2) is arranged in the shell (3) through a bearing, and a rotor (5) is arranged at the end of the shaft body (4); the motor is characterized in that a stator base (6) is arranged at one end of the shell (3), a machine cover (7) is arranged on one side of the stator base (6), a liquid outlet (8) is formed in the center of the machine cover (7), and a working cavity (9) communicated with the liquid outlet (8) is formed between the machine cover (7) and the stator base (6). The sealing performance of the gap between the shaft body and the stator base is improved through the arranged filler assembly, leakage of slurry is prevented, and impurities are prevented from invading into the cavity. In addition, the packing assembly can also achieve a good auxiliary supporting effect on the shaft body.

Description

Technical Field

[0001] The present invention relates to slurry pump equipment, in particular to a horizontal precipitator. Background Art

[0002] A precipitator is an industrial equipment for realizing solid-liquid separation. It mainly makes solid particles suspended in a liquid aggregate and settle through physical or chemical actions, so as to achieve the purpose of separating and enriching solid substances. There is a kind of existing precipitator. For example, a Chinese invention patent with the publication number CN101787657A discloses a main shaft driven by a power unit, a working cavity, and a rotor rotating in the cavity. The rotor includes a disc connected to the main shaft; a cylindrical cavity is provided with a discharge port in front of the rotor. In addition, the cavity is provided with two feeding channels spraying towards the rotor; the first feeding channel is a synthetic resin solution feeding channel, and the second feeding channel is a coagulant feeding channel. The shaft body of the precipitator passes through the inner wall of the cavity and is supported by the inner wall of the cavity. The gap sealing performance between the shaft body and the inner wall is very crucial, and there is no stable and well-sealed structure at this place in this precipitator, which may lead to leakage of slurry or invasion of impurities. Summary of the Invention

[0003] The purpose of the present invention is to provide a horizontal precipitator. The present invention improves the gap sealing performance between the shaft body and the stator seat by setting a packing assembly, prevents leakage of slurry, and avoids invasion of impurities into the cavity. In addition, the packing assembly can also provide a good auxiliary support effect for the shaft body.

[0004] The technical solution of the present invention: A horizontal precipitator includes a base, on which a three-phase motor and a housing are provided. Inside the housing, a shaft body connected to the output end of the three-phase motor is provided via a bearing, and a rotor is provided at the end of the shaft body; one end of the housing has a stator seat, a machine cover is provided on one side of the stator seat, a liquid outlet is provided at the center of the machine cover, and a working chamber communicating with the liquid outlet is provided between the machine cover and the stator seat; a packing assembly sleeved on the shaft body and used for sealing the gap between the stator seat and the shaft body is provided on one side of the stator seat. The packing assembly has a precipitated liquid inlet pipe extending to the outside of the housing, and the inner end of the precipitated liquid inlet pipe communicates with the working chamber through a channel on the stator seat. A slurry feeding port communicating with the working chamber is provided at the bottom of the stator seat.

[0005] In the above horizontal precipitator, a lubricating chamber is provided inside the housing, the shaft body is arranged in the lubricating chamber, end covers are provided at both ends of the lubricating chamber, the shaft body passes through the end covers, and there is an oil seal rubber between the shaft body and the end covers; a breather cap for the lubricating chamber to breathe is provided on the housing.

[0006] In the aforementioned horizontal precipitator, the packing assembly includes a bushing sleeved on the shaft body and a stuffing box arranged on one side of the stator seat; a cold water ring is provided on the bushing; one end of the stuffing box has a gland, and the gland and the stuffing box are located on the outer cylindrical surface of the bushing. A flexible graphite packing layer is arranged in the space between the bushing and the stuffing box; the precipitating liquid inlet pipe is arranged on the stuffing box.

[0007] In the aforementioned horizontal precipitator, a nozzle assembly is provided in the slurry inlet.

[0008] In the aforementioned horizontal precipitator, a gasket is provided between the stator seat and the end of the stuffing box.

[0009] In the aforementioned horizontal precipitator, the shaft body is connected to the output end of the three-phase motor through a coupling; a protective cover for covering the coupling is provided on the base.

[0010] In the aforementioned horizontal precipitator, the clearance between the stator seat and the rotor ranges from 0.23 mm to 0.27 mm.

[0011] In the aforementioned horizontal precipitator, the bushing is fixed on the shaft body by set screws.

[0012] In the aforementioned horizontal precipitator, the precipitating liquid inlet pipe is connected to the stuffing box through a threaded structure, and the precipitating liquid inlet pipe extends obliquely to the outside of the housing.

[0013] Compared with the prior art, the present invention has the following advantages:

[0014] 1. In the present invention, the shaft body is installed in the housing through bearings, and the rotor connected to the end of the shaft body is arranged in the working chamber formed by the stator seat and the machine cover. A packing assembly sleeved on the shaft body is provided on one side of the stator seat. The precipitating liquid inlet pipe extending to the outside of the housing is provided on the packing assembly. After the precipitating liquid enters from the pipe body, it flows into the working chamber through the channel on the stator seat. The nozzle assembly at the bottom of the stator seat fills the slurry into the working chamber. The centrifugal force generated by the high-speed rotation of the rotor enables the precipitating liquid and the slurry to complete radial diffusion and turbulent mixing in a short time. By providing a packing assembly on one side of the stator seat, the packing assembly can effectively seal the gap between the shaft body and the stator seat, prevent the slurry in the working chamber from leaking out through this gap, avoid equipment contamination or waste of slurry, and at the same time prevent external impurities from entering the working chamber through this gap. In addition, the packing assembly can also provide a good auxiliary support effect for the shaft body.

[0015] 2. The shaft body is installed in the housing through bearings and is configured with an independent lubrication chamber to form a fully enclosed lubrication system, reducing the frictional loss between the shaft body and the supporting components.

[0016] 3. The gap between the stator base and the rotor is strictly controlled between 0.23 mm and 0.27 mm to ensure that a uniform shear field is formed when the fluid passes through the working chamber, avoiding abnormal local flow velocity caused by uneven gaps. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of the present invention;

[0018] Figure 2 is a schematic internal view of the housing;

[0019] Figure 3 is a schematic view of the machine cover;

[0020] Figure 4 is a schematic top view of the present invention;

[0021] Figure 5 is a schematic view of the lubrication chamber.

[0022] Explanation of the reference numerals in the drawings: 1 - base, 2 - three-phase motor, 3 - housing, 4 - shaft body, 5 - rotor, 6 - stator base, 7 - machine cover, 8 - liquid outlet, 9 - working chamber, 10 - packing assembly, 11 - precipitate liquid inlet pipe, 12 - slurry feed port, 13 - lubrication chamber, 14 - end cover, 15 - oil seal rubber, 16 - breather cap, 17 - shaft sleeve, 18 - cold water ring, 19 - stuffing box, 20 - gland, 21 - flexible graphite packing layer, 22 - nozzle assembly, 23 - gasket, 24 - protective cover, 25 - left half coupling, 26 - right half coupling, 27 - baffle. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The present invention will be further described below in conjunction with the drawings and embodiments, but it shall not be taken as a basis for limiting the present invention.

[0024] Embodiment: A horizontal precipitator, including a base 1, a three-phase motor 2 is provided on the base 1, and a housing 3 is installed on the base 1. As shown in the attached drawings Figure 1 and 4 , a shaft body 4 connected to the output end of the three-phase motor 2 is installed in the housing 3 through bearings, and one end of the shaft body 4 is arranged outside the housing 3; the coupling between the coupling and the output end of the three-phase motor 2 includes a left half coupling 25 connected to the output end of the three-phase motor 2 and a right half coupling 26 connected to one end of the shaft body 4. Baffles 27 are provided at the connecting parts of the left half coupling 25 and the right half coupling 26. The left half coupling 25 and the right half coupling 26 are connected by bolt members, and the ends of the bolt members are in close contact with the baffles 27. This coupling is a detachable structure, which is convenient and fast to disassemble. The other end of the shaft body 4 is installed with a rotor 5. After the rotor is on the shaft body, a split nut is installed at the end of the shaft body, and one end of the split nut is in close contact with the rotor; one end of the housing 3 has a stator base 6, as shown in the attached drawingsFigure 2 As shown, a machine cover 7 is installed on one side of the stator base 6, as shown in the appendix Figure 3As shown in the figure, the central part of the machine cover 7 has a liquid outlet 8. A working chamber 9 is formed between the machine cover 7 and the stator seat 6. The clearance between the stator seat 6 and the rotor 5 ranges from 0.23 mm to 0.27 mm. By strictly controlling the clearance between the rotor and the stator seat, it is beneficial to ensure that a uniform shear field is formed when the fluid in the working chamber passes through, and avoid abnormal local flow velocity caused by uneven clearance. A steering identification plate of the rotor is riveted on the upper part of the housing. On one side of the stator seat 6, there is a packing assembly 10 sleeved on the shaft body 4 and used to seal the clearance between the stator seat 6 and the shaft body 4. The packing assembly 10 has a precipitate liquid inlet pipe 11 extending to the outside of the housing 3. The packing assembly 10 includes a shaft sleeve 17 sleeved on the shaft body 4 and a stuffing box 19 arranged on one side of the stator seat 6. The shaft sleeve 17 has a cold water ring 18. One end of the stuffing box 19 has a gland 20. The gland 20 and the stuffing box 19 are located on the outer cylindrical surface of the shaft sleeve 17. A flexible graphite packing layer 21 is arranged in the space between the shaft sleeve 17 and the stuffing box 19. The precipitate liquid inlet pipe 11 is arranged on the stuffing box 19. The combination of the flexible graphite packing layer and the gland is adopted in the stuffing box. The flexible graphite packing has the characteristics of high adaptability, long service life, low friction and resistance to extreme environments. In the present invention, its combined structure with the shaft sleeve and the gland can effectively solve the problem of medium leakage under high-speed rotation. At the same time, the self-lubricating property reduces the wear of the shaft body, improves the reliability and economy of the equipment operation. Together with the cold water ring outside the shaft sleeve (cooling medium flow velocity ≥ 0.8 m / s), dynamic sealing between the working chamber and the outside is realized, and the leakage amount ≤ 5 ml / h. The clearance is filled by extrusion deformation to further enhance the sealing effect and absorb the tiny vibration during the operation of the main shaft. There is a gasket 23 between the stator seat 6 and the end of the stuffing box 19. The material of the gasket is polytetrafluoroethylene, which has good high-temperature and corrosion resistance, and prevents equipment corrosion caused by slurry leakage.One end of the packing seat 19 is connected to the stator seat 6, and the other end presses the flexible graphite packing layer 21 through the gland 20. A round hole concentric with the shaft body is provided inside to ensure uniform fitting between the shaft sleeve and the main shaft and avoid eccentric wear. By tightening the gland with bolts, the packing layer can be compressed to adjust the clamping force of the packing ring on the main shaft and achieve dynamic optimization of the sealing performance. The shaft sleeve 17 is fixed on the shaft body 4 through set screws to achieve axial positioning of the shaft sleeve and ensure a stable connection between the shaft sleeve and the shaft body. The inner end of the precipitation liquid inlet pipe 11 communicates with the working chamber 9 through the channel on the stator seat 6. The role of the precipitation liquid is mainly reflected in promoting solid-liquid separation and optimizing the precipitation reaction process. The precipitation liquid usually contains specific chemical substances (such as electrolytes, flocculants, surfactants, etc.). Its core role is to cause the solid particles suspended in the liquid to aggregate and settle through the following mechanism. The precipitation liquid enters the stator seat channel through the precipitation liquid inlet pipe and flows into the working chamber; it mixes with the slurry (suspension containing solid particles to be separated) sprayed from the nozzle assembly at the bottom of the stator seat; under the action of the high-speed rotating rotor, the precipitation liquid and the slurry are in full contact, and the particles aggregate through chemical action to form a flocculent fiber slurry; finally, it is discharged through the liquid outlet at the center of the machine cover to achieve solid-liquid separation. The precipitation liquid inlet pipe 11 is connected to the stuffing box 19 through a threaded structure, and the precipitation liquid inlet pipe 11 extends obliquely to the outside of the housing 3. The setting of the obliquely arranged precipitation liquid inlet pipe 11 can make the precipitation liquid flow in more smoothly and quickly, which helps the liquid to mix with the pulp pool. The bottom of the stator seat 6 has a slurry inlet 12 communicating with the working chamber 9. When installing the precipitation liquid inlet pipe, its threaded end needs to be wrapped with raw tape. The precipitation liquid is pre-cooled through the cold water ring of the packing assembly and uniformly injected into the working chamber along the radial direction of the shaft body through the precipitation liquid inlet pipe. The slurry inlet 12 is provided with a nozzle assembly 22, and the slurry is sprayed at a high speed (the outlet flow rate can reach 15-20 m / s by adopting a tapered flow channel design) to the rotor action area through the nozzle assembly at the bottom of the stator seat.

[0025] The base 1 is connected to the ground through a plurality of anchor bolt assemblies. When the present invention operates, it will generate large vibrations. To ensure the stability of the base and the components on the base, the base is connected to the ground through the anchor bolt parts. The housing 3 has a lubrication chamber 13, as shown in the appendix Figure 5As shown, the shaft 4 is disposed within the lubrication chamber 13. End caps 14 are installed at both ends of the lubrication chamber 13. The shaft 4 is disposed through the end caps 14, and a rubber oil seal 15 is installed between the shaft 4 and the end caps 14 to seal and prevent lubricating oil leakage. The housing 3 is provided with a breather cap 16 for ventilation of the lubrication chamber 13. The shaft is mounted within the housing via high-precision bearings and equipped with an independent lubrication chamber, forming a fully enclosed lubrication system that reduces friction loss between the shaft and supporting components. The lubrication chamber features a visual oil level observation window, supporting oil quality monitoring without stopping the machine. The packing assembly gland can be quickly removed using circumferentially distributed bolts, reducing the time required to replace the packing. The lubricating oil level should not exceed two-thirds of the oil mark.

[0026] The base 1 is provided with a protective cover 24 for covering the coupling. The base is equipped with a detachable coupling protective cover to prevent the moving parts from being exposed and causing safety hazards.

[0027] The working principle of the present invention is as follows: after the three-phase motor 2 is energized, it outputs power, which is transmitted to the shaft body 4 through the coupling, driving the shaft body to rotate at high speed. The coupling adopts a bolt connection structure, and the end of the bolt is in close contact with the baffle 27 to ensure the stability and detachability of power transmission; the shaft body is installed in the lubrication chamber 13 of the shell 3 through a bearing, and the two ends of the lubrication chamber 13 are sealed by the end cover 14, and the oil seal rubber 15 is used to prevent the leakage of lubricating oil; the slurry (suspension containing solid particles) is sprayed into the working chamber 9 at high speed through the nozzle assembly 22 in the slurry feed port 12 at the bottom of the stator seat 6, and the precipitate is passed through the precipitate inlet pipe on the packing assembly 10. 11 is injected, flows into the stator seat channel evenly along the radial direction of the shaft, and finally enters the working chamber; the rotor 5 at the other end of the shaft rotates at high speed with the shaft, forming a centrifugal field in the working chamber. The high-speed rotating rotor causes the slurry and the precipitate to complete radial diffusion and turbulent mixing under the action of centrifugal force. After the slurry is injected at high speed, it is fully in contact with the precipitate, and the solid particles are aggregated through charge neutralization, bridging adsorption and other effects to form flocculent fiber slurry; the mixed fluid is further accelerated by the centrifugal action of the rotor to further accelerate the particle sedimentation, and the concentration of the particle size distribution of the formed flocculent is improved, and finally discharged through the liquid outlet 8 in the center of the machine cover 7 to achieve solid-liquid separation.

Claims

1. Horizontal precipitation machine, comprising a base (1), a three-phase motor (2) and a housing (3) are provided on the base (1), a shaft body (4) connected to the output end of the three-phase motor (2) is provided in the housing (3) via a bearing, and a rotor (5) is provided at the end of the shaft body (4); characterized in that: One end of the housing (3) has a stator base (6). A machine cover (7) is provided on one side of the stator base (6). The center of the machine cover (7) has a liquid outlet (8). A working chamber (9) communicating with the liquid outlet (8) is provided between the machine cover (7) and the stator base (6). A packing assembly (10) sleeved on the shaft body (4) and used for sealing the gap between the stator base (6) and the shaft body (4) is provided on one side of the stator base (6). A precipitate liquid inlet pipe (11) extending to the outside of the housing (3) is provided on the packing assembly (10). The inner end of the precipitate liquid inlet pipe (11) is communicated with the working chamber (9) through a channel on the stator base (6). The bottom of the stator base (6) has a slurry material port (12) communicating with the working chamber (9).

2. The horizontal precipitator according to claim 1, characterized in that: A lubrication chamber (13) is provided inside the housing (3). The shaft body (4) is arranged in the lubrication chamber (13). End covers (14) are provided at both ends of the lubrication chamber (13). The shaft body (4) passes through the end covers (14), and there is an oil seal rubber (15) between the shaft body (4) and the end covers (14). A breather cap (16) for the ventilation of the lubrication chamber (13) is provided on the housing (3).

3. The horizontal precipitator according to claim 1, wherein: The packing assembly (10) includes a shaft sleeve (17) sleeved on the shaft body (4) and a stuffing box (19) provided on one side of the stator base (6). A cold water ring (18) is provided on the shaft sleeve (17). One end of the stuffing box (19) has a gland (20). The gland (20) and the stuffing box (19) are located on the outer circular surface of the shaft sleeve (17). A flexible graphite packing layer (21) is arranged in the space between the shaft sleeve (17) and the stuffing box (19). The precipitate liquid inlet pipe (11) is arranged on the stuffing box (19).

4. The horizontal precipitation machine according to claim 1, wherein: A nozzle assembly (22) is provided in the slurry material port (12).

5. The horizontal precipitator according to claim 3, characterized in that: A gasket (23) is provided between the stator base (6) and the end of the stuffing box (19).

6. The horizontal precipitation machine according to claim 1, characterized in that: The shaft body (4) is connected to the output end of the three-phase motor (2) through a coupling. A protective cover (24) for covering the coupling is provided on the base (1).

7. The horizontal precipitation machine according to claim 1, characterized in that: The gap between the stator base (6) and the rotor (5) ranges from 0.23 mm to 0.27 mm.

8. The horizontal precipitator according to claim 3, characterized in that: The shaft sleeve (17) is fixed on the shaft body (4) by a set screw.

9. The horizontal precipitation machine according to claim 1, characterized in that: The precipitate liquid inlet pipe (11) is connected to the stuffing box (19) through a threaded structure, and the precipitate liquid inlet pipe (11) extends obliquely to the outside of the housing (3).

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