CN204419615U - A kind of scale pump - Google Patents

Abstract

The utility model discloses an oxide skin pump, which comprises an impeller, the inlet of the impeller is connected with the pump cover, the back of the impeller is connected with an auxiliary impeller; There are skeleton oil seals between the guide body and the lower shaft, between the connecting block and the lower shaft; The outer casing is connected to the connecting pipe, the lower shaft, the intermediate shaft and the upper shaft are all supported by bearings, the bearings and the shaft are in static fit, the bearing is located in the bearing seat, and the convex and concave fit between the bearing seat and the connecting pipe; the upper end of the upper shaft is connected to the power system, The power system is driven by a motor; the connecting pipe and the power system are both arranged on the pump support. The metal pump of the utility model is reliable and stable in operation, has a prolonged service life, and the cost of processing and assembling the pump body and the cost of maintenance are very low.

Description

A kind of iron oxide skin pump

technical field

The utility model relates to a pump device, in particular to an iron oxide skin pump.

Background technique

The existing pump industry uses long-axis vertical miscellaneous sewage pumps to transport and treat urban and power plant sewage. The structure of long-axis vertical miscellaneous sewage pumps is shown in Figure 1. Long-axis vertical miscellaneous sewage pumps have the following disadvantages when used:

1. The bearing in the pump body adopts water-lubricated bearing 107. Since the bearing is generally made of polytetrafluoroethylene or polyetherether copper, etc., its expansion coefficient is relatively large, and when the water-lubricated guide bearing 107 and the shaft 108 cooperate with each other, more heat is generated. It is easy to lock the shaft 108, so that the water-lubricated bearing 107 and the shaft 108 are scrapped, and the service life of the water-lubricated bearing 107 is 1-3 months, causing the pump to have a short service life;

2. The shafts 108 in the pump body are connected by Haval 104. Although the alignment of the Haval 104 connection is good, it has the disadvantage that it is easy to fall off during use;

3. Because the pump body is relatively long, when the pump needs to change the shaft or bearing, it must be disassembled from the guide shaft seat 115, and then the guide bearing cover 114, impeller nut 113, pump cover 112 and impeller 111 are removed in sequence. The whole pump can be disassembled for maintenance, and it takes a long time to replace the bearings, resulting in a long time for pump body maintenance;

4. The connection between the connecting pipe 105 and the guide bearing bracket 106 belongs to the inner sub-port, and the concentricity, parallelism, and perpendicularity between the two must be ensured, resulting in complicated processing of the connecting pipe 105 and low processing efficiency;

5. When the long-axis vertical miscellaneous sewage pump is used, clean cooling water needs to be added to the protective pipe 103. The cooling water goes up and down and finally enters the air guide 112 behind the impeller 111 and is transported away with the medium, which seriously wastes water resources;

6. Only two disc bearings are used for the bearings, and the rest are water-lubricated bearings. Because the water-lubricated bearings are easy to wear, the shaft 108 and the water-lubricated guide bearing 107 are eccentrically loaded, the precision is reduced, and the vibration is too large when the pump is running. greatly shortened lifespan;

7. The pump adopts packing seal, which has poor sealing effect. When the pump is running, the shaft 108 and the packing 102 form a dynamic fit, and the packing wears to cause leakage.

Utility model content

The purpose of the utility model is to provide an iron oxide skin pump, which is reliable and stable in operation, has a long service life, and has low processing and assembly costs and maintenance costs for the pump body.

In order to achieve the above object, the technical solution taken by an embodiment of the utility model is:

Including the impeller, the inlet of the impeller is connected to the pump cover, the outlet of the impeller is connected to the auxiliary impeller, the auxiliary impeller is connected to the guide body, the other end of the auxiliary impeller is connected to the lower shaft, and the guide body is connected to the protective pipe through the connecting block; between the guide body and the lower shaft, the connecting block There is a skeleton oil seal between the lower shaft and the lower shaft; the lower shaft is connected to the upper shaft through a plurality of intermediate shafts; the lower shaft, the intermediate shaft and the upper shaft are connected with a plurality of protective tubes, and the protective tube is connected with a connecting pipe, the lower shaft, the intermediate shaft and the upper shaft The shafts are all supported by bearings, the bearings and the shafts are in static fit, the bearings are located in the bearing housing, and the bearing housing and the connecting pipe are in a convex-convex fit; the upper end of the upper shaft is connected to the power system, and the power system is driven by a motor; the connecting pipe and the power system are located on the pump support.

Preferably, the upper end of the upper shaft and the power system, between the lower shaft and the intermediate shaft, between the intermediate shafts, and between the intermediate shaft and the upper shaft are all axially connected through pump couplings, electric couplings and shaft pins.

Preferably, the bearings are equipped with skeleton oil seals and O-ring static seals; the impeller is equipped with auxiliary impeller dynamic seals.

Preferably, the pump cover is connected to a strainer.

The beneficial effect that this iron oxide skin pump produces is:

1. The pump coupling, electric coupling, and shaft pin are connected to transmit torque between the shafts and reduce vibration and automatically adjust the coaxiality between the shafts;

2. The connecting pipe and the bearing seat are combined with convex and concave, forming a guide pipe to make the conveyed medium flow from bottom to top, and the connecting pipe adopts the boss to solve the processing problem;

3. There is a skeleton oil seal between the bearing and the shaft, and a closed space is formed between the bearing seat, the bearing gland, the bearing and the skeleton oil seal. After filling up with grease, a good oil seal space is formed to lubricate the bearings running at high speed; the grease It is cooled by its own conveying medium, without adding cooling water.

4. There is a static fit between the bearing and the shaft, there is no friction, and there is no wear, so that the shaft and the bearing always maintain a high-precision fit, thereby ensuring the smooth operation;

5. The impeller, pump cover, mouth ring, and air guide form a sealed space. The impeller rotates at a constant speed after receiving the torque from the shaft, and transmits the force to the conveyed medium, and gives the liquid a centrifugal force and upward thrust. The liquid flows to the outlet of the pump through the space formed by the extension pipe and the bearing seat of the connecting pipe, so as to achieve the purpose of pumping the liquid medium;

6. Each bearing position in the pump body adopts a skeleton oil seal and an O-ring static seal, and the auxiliary impeller dynamic seal is installed on the impeller, and the gap between the impeller and the space guide vane is controlled at 0.3-0.5mm, and the sealing effect is better.

Description of drawings

FIG. 1 is a schematic structural view of an existing long-axis vertical miscellaneous sewage pump.

Fig. 2 is a schematic structural view of an embodiment of an iron oxide skin pump of the present invention.

Detailed ways

In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with specific embodiments of the utility model and corresponding drawings.

Referring to Fig. 2, Fig. 2 is a structural schematic view of an embodiment of an iron oxide skin pump of the present invention. In this embodiment, the iron oxide pump includes an impeller 203, the inlet of the impeller 203 is connected to the pump cover 202, the outlet of the impeller 203 is connected to the auxiliary impeller 204, the auxiliary impeller 204 is externally connected to the guide body 205, and the other end of the auxiliary impeller 204 is connected to the lower shaft 210, the guide body 205 is connected to the protective tube 209 through the connecting block 207; a skeleton oil seal 206 is provided between the guide body 205 and the lower shaft 210, and between the connecting block 207 and the lower shaft 210; the lower shaft 210 is connected to the upper shaft 212 through a plurality of intermediate shafts 211 The lower shaft 210, the intermediate shaft 211 and the upper shaft 212 are externally connected with a plurality of protective tubes 209, the protective tube 209 is externally connected with the connecting pipe 208, the lower shaft 210, the intermediate shaft 211 and the upper shaft 212 are all supported by bearings, and between the bearings and the shafts is Static fit, the bearing is located in the bearing seat, and the convex-convex fit between the bearing seat and the connecting pipe 208; the upper end of the upper shaft 212 is connected to the power system, and the power system is driven by the motor 214;

Referring to Fig. 2, in one embodiment of the present utility model, between the upper end of the upper shaft 212 and the power system, between the lower shaft 210 and the middle shaft 211, between the middle shaft 211, and between the middle shaft 211 and the upper shaft 212 The shaft is connected by a pump coupler 213, an electric coupler and a shaft pin.

Referring to Fig. 2, in one embodiment of the present utility model, the bearings are equipped with skeleton oil seals and O-ring static seals; the impeller 203 is equipped with an auxiliary impeller 204 dynamic seal.

Referring to FIG. 2 , in one embodiment of the present invention, a pump cover 202 is connected to a filter screen 201 .

The above embodiments are used to explain the utility model, rather than to limit the utility model. Within the spirit of the utility model and the protection scope of the claims, any modifications and changes made to the utility model fall into the scope of the utility model. scope of protection.

Claims (4)

1. An iron oxide skin pump, characterized in that it comprises an impeller, the impeller inlet is connected to the pump cover, the impeller outlet is connected to the auxiliary impeller, the auxiliary impeller is covered with a guide body, and the other end of the auxiliary impeller is connected to the lower shaft, The guiding body is connected to the protective pipe through a connecting block; skeleton oil seals are provided between the guiding body and the lower shaft, and between the connecting block and the lower shaft; the lower shaft is connected to the upper shaft through a plurality of intermediate shafts; the The lower shaft, the intermediate shaft and the upper shaft are externally connected with a plurality of protective tubes, and the protective tubes are externally connected with connecting pipes. The lower shaft, intermediate shaft and upper shaft are all supported by bearings, and the bearings are statically fitted with the shafts. The bearing is located in the bearing seat, and the bearing seat and the connecting pipe are in convex-convex fit; the upper end of the upper shaft is connected to the power system, and the power system is driven by a motor; the connecting pipe and the power system are both arranged in the pump on the stand. 2. The iron oxide skin pump according to claim 1, characterized in that, between the upper end of the upper shaft and the power system, between the lower shaft and the intermediate shaft, between the intermediate shaft, between the intermediate shaft and the The upper shafts are evenly connected by a pump coupler, an electric coupler and a shaft pin. 3. The iron oxide skin pump according to claim 1 or 2, characterized in that the bearings are equipped with skeleton oil seals and O-ring static seals; the impeller is equipped with auxiliary impeller dynamic seals. 4. The scale pump according to claim 3, characterized in that the pump cover is connected to a filter screen.