CN219711803U

CN219711803U - Multistage pump

Info

Publication number: CN219711803U
Application number: CN202321252120.1U
Authority: CN
Inventors: 孟令博; 温宇; 隋澄; 王力; 高军; 孙策; 张孝龙
Original assignee: Dalian Source Pumps Co ltd
Current assignee: Dalian Source Pumps Co ltd
Priority date: 2023-05-23
Filing date: 2023-05-23
Publication date: 2023-09-19
Anticipated expiration: 2033-05-23

Abstract

The utility model discloses a multistage pump, which belongs to the field of multistage pumps and aims to solve the problems that two sets of seals are needed in end covers on two sides of the multistage pump, but the seals are easy to leak under the high-pressure extrusion of internal media and the movement of a shaft, so that the normal use of the multistage pump is influenced and the maintenance cost is increased; according to the utility model, the motor is started to work, so that the coupler and the shaft rod are driven to rotate, at the moment, water can be thrown to the periphery of the impeller along the flow channel between two adjacent groups of convex edges, then enters the impeller at the next stage through the guide vane, finally is discharged through the drain pipe, thus the water flow is completed, and when the water flows, the static ring and the movable ring are utilized to form a pair of friction pairs, the static ring has floatability, the buffering effect can be achieved, the movable ring can move flexibly in the axial direction, the good fitting performance can be ensured, the water leakage can be prevented, the mechanical sealing effect can be achieved, and the normal use of the multistage pump structure is ensured.

Description

Multistage pump

Technical Field

The present utility model relates to a multistage pump, and more particularly, to a multistage pump.

Background

The multistage pump is a centrifugal pump with water inlet and outlet sections and middle sections combined together through a pull rod, and the output water pressure of the multistage pump can be very high, and centrifugal force is acquired by means of rotation of an impeller, so that materials are obtained. When the gas density reaches the working range of the mechanical vacuum pump, the gas is pumped out, so that high vacuum is gradually obtained. In the document of CN208073772U, a multistage pump is proposed, comprising an inlet bearing housing, an outlet bearing housing, a pump shaft connected between the inlet bearing housing and the outlet bearing housing, an inlet pump body connected to the inlet bearing housing, an outlet pump body connected to the outlet bearing housing, and a plurality of intermediate sections sleeved on the pump shaft and connected between the inlet pump body and the outlet pump body; a balance disc and a balance sleeve are also arranged between the bearing box at the outlet and the outlet pump body; the pump further comprises an impeller connected to the pump shaft and communicated with the middle section, and a guide vane connected to the inlet pump body and matched with the impeller; two liquid inlets are symmetrically arranged on the impeller; a detachable spacer block is arranged between the balance disc and the balance sleeve; the detachable spacer blocks are connected to the balance disc or the balance sleeve; the effect of balanced axial force has been guaranteed, has prolonged balance dish and balanced cover's life, however in the in-process that multistage pump used, the inside two sets of sealings that need of both sides end cover of multistage pump, but the sealing member is under the high-pressure extrusion of inside medium and the axle removal, and the sealing member causes the leakage easily, influences the normal use of multistage pump, has improved cost of maintenance.

Disclosure of Invention

The utility model aims to overcome the defect that two sets of seals are needed inside end covers at two sides of a multistage pump in the prior art, but the seals are easy to leak under the high-pressure extrusion and shaft movement of internal media, so that the normal use of the multistage pump is affected, the maintenance cost is increased, and the multistage pump is provided to solve the defects and is convenient to use.

In order to achieve the above purpose, the technical scheme provided by the utility model is as follows:

the utility model relates to a multistage pump, which comprises a multistage pump structure, wherein the multistage pump structure comprises a pump shell and a water inlet pipe arranged at the upper end of the pump shell and used for water inlet, a water outlet pipe used for water outlet is further arranged at one side of the water inlet pipe, a shaft rod is inserted into the pump shell, one end of the shaft rod is positioned at the outer side of the pump shell and connected with a coupling, and the coupling is connected with the output end of a motor;

the inside of pump case has been seted up the water cavity, the outside of axostylus axostyle is provided with the axle lantern ring, the outside of axle lantern ring is provided with the impeller, the impeller passes through the axle lantern ring cover and establishes on the axostylus axostyle, one side of impeller is provided with the stator that is used for the water conservancy diversion, the inside of pump case still is provided with the sealing member that is used for sealedly, the sealing member is including setting up the gland in the axostylus axostyle outside and setting up the quiet ring inside the gland, one side of gland is provided with the rotating ring, one side of rotating ring is provided with the spring, and the outside of quiet ring and rotating ring all is provided with the sealing washer, the other end of spring is connected with the holding ring, and the holding ring overlaps equally and establishes on the axostylus axostyle outer wall, the effect of quiet ring and rotating ring is prevented that the medium from revealing, the spring plays the effect of pretension buffering.

Preferably, a diversion hole is formed in the pump shell, the diversion hole is communicated with the water inlet pipe, and water entering the water inlet pipe flows to the impeller through the impeller.

Preferably, the outer wall of the impeller is uniformly provided with a plurality of groups of convex edges, the outer wall of the convex edges is provided with a wear-resistant protection pad for wear resistance, the outer wall of the impeller is also coated with a wear-resistant coating, and the wear-resistant protection pad is used for protecting the convex edges.

Preferably, the left end and the right end of the pump shell are respectively connected with a second end cover and a first end cover, and the shapes of the second end cover and the first end cover are consistent.

Preferably, the oil filler point has been seted up on the surface of second end cover, and the guiding gutter has been seted up to the inside of second end cover, and the bearing housing is established in the outside of axostylus axostyle, and the bearing is located the inside of second end cover, and oil filler point and guiding gutter are used for lubricating oil to get into, can lubricate the bearing.

Preferably, a supporting block is arranged at the lower end of the pump shell, the supporting block is fixedly installed through bolts, and the position of the pump shell can be supported through the supporting block.

Preferably, the two groups of support blocks are arranged, and the two groups of support blocks are symmetrically distributed about the central line of the pump shell.

Preferably, the filter screen for filtering water is arranged in the water inlet pipe, and the installation discs are arranged at the upper ends of the water inlet pipe and the water outlet pipe.

Compared with the prior art, the technical scheme provided by the utility model has the following beneficial effects:

(1) According to the multistage pump, water flows enter from the water inlet pipe, can be filtered through the filter screen, impurities in the water are reduced, the filtered water enters the impeller through the guide holes, the motor is started to work, the shaft rod and the coupler are driven to rotate, at the moment, the water can be thrown to the periphery of the impeller along a flow passage between two adjacent groups of convex edges, then enters the impeller at the next stage through the guide vane and finally is discharged through the water discharge pipe, so that the water flow is completed, in addition, when the water flows, the static ring and the movable ring form a pair of friction pairs, the static ring has floatability, the buffer effect can be achieved, the movable ring can move flexibly in the axial direction, good attaching performance can be guaranteed, the effect of mechanical sealing can be achieved, and the normal use of the multistage pump structure is guaranteed.

(2) According to the multistage pump, through the impeller, the wear-resistant coating and the wear-resistant protection pad, when water flow enters the water cavity and contacts with the impeller, the impeller can be protected by the wear-resistant coating and the wear-resistant protection pad, so that the service life of the impeller is prolonged.

Drawings

FIG. 1 is an overall block diagram of the present utility model;

FIG. 2 is a schematic cross-sectional view of the internal structure of the pump housing of the present utility model;

FIG. 3 is an enlarged schematic view of FIG. 2A in accordance with the present utility model;

FIG. 4 is a schematic side view of a second end cap structure of the present utility model;

fig. 5 is a schematic side view of an impeller of the present utility model.

In the figure: 1. a multistage pump structure; 11. a pump housing; 111. a water cavity; 112. a shaft collar; 113. an impeller; 1131. a raised edge; 1132. wear-resistant protection pad; 1133. a wear-resistant coating; 114. a guide vane; 115. a deflector aperture; 116. a seal; 1161. a gland; 1162. a stationary ring; 1163. a seal ring; 1164. a moving ring; 1165. a spring; 1166. a positioning ring; 117. a first end cap; 118. a second end cap; 1181. an oil filling hole; 1182. a diversion trench; 1183. a bearing; 12. a water inlet pipe; 121. a filter screen; 122. a mounting plate; 13. a drain pipe; 14. a support block; 15. a shaft lever; 16. a coupling.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

For a further understanding of the present utility model, the present utility model will be described in detail with reference to the drawings.

Referring to fig. 1, the multistage pump of the present utility model comprises a multistage pump structure 1, wherein the multistage pump structure 1 comprises a pump shell 11 and a water inlet pipe 12 arranged at the upper end of the pump shell 11 for water inlet, a water outlet pipe 13 for water outlet is further arranged at one side of the water inlet pipe 12, a shaft lever 15 is inserted into the pump shell 11, one end of the shaft lever 15 is positioned at the outer side of the pump shell 11 and connected with a coupling 16, and the coupling 16 is connected with the output end of a motor.

The utility model is further described below with reference to examples.

2-5, a water through cavity 111 is formed in the pump shell 11, a shaft sleeve ring 112 is arranged on the outer side of a shaft rod 15, an impeller 113 is arranged on the outer side of the shaft sleeve ring 112, the impeller 113 is sleeved on the shaft rod 15 through the shaft sleeve ring 112, a guide vane 114 for guiding flow is arranged on one side of the impeller 113, a sealing piece 116 for sealing is also arranged in the pump shell 11, the sealing piece 116 comprises a gland 1161 arranged on the outer side of the shaft rod 15 and a static ring 1162 arranged in the gland 1161, a movable ring 1164 is arranged on one side of the gland 1161, a spring 1165 is arranged on one side of the movable ring 1164, sealing rings 1163 are arranged on the outer sides of the static ring 1162 and the movable ring 1164, a positioning ring 1166 is connected to the other end of the spring 1165, the positioning ring 1166 is sleeved on the outer wall of the shaft rod 15, the static ring 1162 and the movable ring 1164 play a role of preventing medium leakage, the spring 1165 plays a role of pre-tightening buffering, a guiding hole 115 is formed in the pump shell 11, the diversion hole 115 is communicated with the water inlet pipe 12, water entering the water inlet pipe 12 flows to the impeller 113 through the impeller 113, a plurality of groups of raised edges 1131 are uniformly distributed on the outer wall of the impeller 113, a wear-resistant protection pad 1132 for wear resistance is arranged on the outer wall of the raised edges 1131, a wear-resistant coating 1133 is further coated on the outer wall of the impeller 113, the wear-resistant protection pad 1132 is used for protecting the raised edges 1131, the impact of water flow on the raised edges 1131 is reduced, the left end and the right end of the pump shell 11 are respectively connected with a second end cover 118 and a first end cover 117, the shapes of the second end cover 118 and the first end cover 117 are consistent, an oil filling hole 1181 is formed in the surface of the second end cover 118, a diversion trench 1182 is formed in the second end cover 118, a bearing 1183 is sleeved on the outer side of the shaft lever 15, the bearing 1183 is positioned in the second end cover 118, the oil filling hole 1181 and the diversion trench 1182 are used for lubricating oil, the lower extreme of pump case 11 is provided with supporting shoe 14, and supporting shoe 14 passes through bolt fixed mounting, can support the position of pump case 11 through supporting shoe 14, and supporting shoe 14 is provided with two sets of, two sets of supporting shoe 14 about the central line symmetric distribution of pump case 11, the internally mounted of inlet tube 12 has the filter screen 121 that is used for water filtration, the mounting disc 122 is all installed to the upper end of inlet tube 12 and drain tube 13, can be connected drain tube 13 and inlet tube 12 with other water pipes through mounting disc 122.

In this embodiment, water flows into the water inlet pipe 12 and can be filtered through the filter screen 121, impurities in the water are reduced, then the filtered water enters the impeller 113 through the guide hole 115, the motor is started to work, the coupling 16 and the shaft lever 15 are driven to rotate, at this time, the water can be thrown to the periphery of the impeller 113 along the flow passage between two adjacent groups of convex edges 1131, then enters the impeller 113 of the next stage through the guide vane 114 and finally is discharged through the water drain pipe 13, so that the water flows, a pair of friction pairs are formed by the static ring 1162 and the movable ring 1164 when the water flows, the static ring 1162 has floatability, the buffering effect can be achieved, the movable ring 1164 can flexibly move in the axial direction, the good fitting performance can be guaranteed, thereby preventing the water leakage, the mechanical sealing effect can be achieved, the normal use of the multistage pump structure 1 is guaranteed, and meanwhile, when the water flows into the water cavity 111 and contacts with the impeller 113, the impeller 113 is protected by the arranged wear-resistant coating 3 and the wear-resistant protection pad 1132, so that the service life of the impeller 113 is prolonged.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A multistage pump comprising a multistage pump structure (1), characterized in that: the multistage pump structure (1) comprises a pump shell (11) and a water inlet pipe (12) arranged at the upper end of the pump shell (11) and used for water inlet, a water outlet pipe (13) used for water outlet is further arranged on one side of the water inlet pipe (12), a shaft rod (15) is inserted in the pump shell (11), one end of the shaft rod (15) is positioned at the outer side of the pump shell (11) and connected with a coupler (16), and the coupler (16) is connected with the output end of a motor;

the inside of pump case (11) has been seted up logical water cavity (111), the outside of axostylus axostyle (15) is provided with axle lantern ring (112), the outside of axle sleeve ring (112) is provided with impeller (113), impeller (113) are established on axostylus axostyle (15) through axle lantern ring (112) cover, one side of impeller (113) is provided with guide vane (114) that are used for the water conservancy diversion, the inside of pump case (11) still is provided with sealing member (116) that are used for sealedly, sealing member (116) are including gland (1161) and the quiet ring (1162) of setting in gland (1161) inside that set up in axostylus axostyle (15), one side of gland (1161) is provided with movable ring (1164), one side of movable ring (1164) is provided with spring (1165), and the outside of quiet ring (1162) and movable ring (1164) all is provided with sealing washer (1163), the other end of spring (1165) is connected with holding ring (1166), and holding ring (1166) are also overlapped on the outer wall of axostylus axostyle (15), the effect of quiet ring (1162) and movable ring (1164) is that prevents medium leakage, the effect of spring (1165) is the effect of the pre-tight buffering.

2. A multistage pump according to claim 1, wherein: the inside of the pump shell (11) is provided with a diversion hole (115), the diversion hole (115) is communicated with the water inlet pipe (12), and water entering the water inlet pipe (12) flows to the impeller (113) through the impeller (113).

3. A multistage pump according to claim 2, wherein: the outer wall of the impeller (113) is uniformly provided with a plurality of groups of raised edges (1131), the outer wall of the raised edges (1131) is provided with wear-resistant protection pads (1132) used for wear resistance, the outer wall of the impeller (113) is also coated with a wear-resistant coating (1133), and the wear-resistant protection pads (1132) are used for protecting the raised edges (1131).

4. A multistage pump according to claim 2, wherein: the left and right ends of the pump shell (11) are respectively connected with a second end cover (118) and a first end cover (117), and the shapes of the second end cover (118) and the first end cover (117) are consistent.

5. A multistage pump according to claim 4, wherein: oil filler point (1181) has been seted up on the surface of second end cover (118), and guiding gutter (1182) has been seted up to the inside of second end cover (118), and outside at axostylus axostyle (15) is established to bearing (1183) cover, and bearing (1183) are located the inside of second end cover (118), and oil filler point (1181) and guiding gutter (1182) are used for lubricating oil to get into, can lubricate bearing (1183).

6. A multistage pump according to claim 4, wherein: the lower extreme of pump case (11) is provided with supporting shoe (14), and supporting shoe (14) are through bolt fixed mounting, can support the position of pump case (11) through supporting shoe (14).

7. A multistage pump according to claim 6, wherein: the two groups of the supporting blocks (14) are arranged, and the two groups of the supporting blocks (14) are symmetrically distributed about the central line of the pump shell (11).

8. A multistage pump according to claim 2, wherein: the filter screen (121) for filtering water is arranged in the water inlet pipe (12), and the installation discs (122) are arranged at the upper ends of the water inlet pipe (12) and the water outlet pipe (13).