CN213298262U

CN213298262U - Shaft seal cooling device of melt gear pump

Info

Publication number: CN213298262U
Application number: CN202021235883.1U
Authority: CN
Inventors: 马新荣; 陶腾; 张国强
Original assignee: Tongkun Group Co Ltd
Current assignee: Tongkun Group Co Ltd
Priority date: 2020-06-30
Filing date: 2020-06-30
Publication date: 2021-05-28
Anticipated expiration: 2030-06-30

Abstract

The utility model relates to a cooling device, concretely relates to fuse-element gear pump bearing seal cooling device, including the bearing seal of fuse-element gear pump, be provided with the coolant runner on the bearing seal, the hybrid tube is connected to the one end of coolant runner, the outlet duct is connected to the other end of coolant runner, the other end of hybrid tube passes through reducing articulate inlet tube, and the inside pipe diameter of inlet tube is less than the inside pipe diameter of hybrid tube, is provided with the motorised valve on the inlet tube, is provided with the intake pipe on the hybrid tube, and the inside pipe diameter of intake pipe is less than the inside pipe diameter of hybrid tube, the intake pipe is connected with the air compressor who sets up in addition. The utility model discloses cooling effect to fuse-element gear pump bearing seal is more stable.

Description

Shaft seal cooling device of melt gear pump

Technical Field

The utility model relates to a cooling device, concretely relates to fuse-element gear pump bearing seal cooling device.

Background

In polyester production plants, melt gear pumps are widely used for pressurizing, conveying and metering high-temperature, high-viscosity polymer melts. The melt gear pump mainly comprises a pump shell, a driving gear, a driven gear, a sliding bearing, a front end plate, a rear end plate, a shaft seal and the like, and the melt is conveyed by means of the change of the working volume caused by the mutual meshing of the driving gear and the driven gear during working. The shaft seal of the melt gear pump mainly has packing seal and spiral seal, material leakage can occur between the shaft seal and the gear shaft under the normal use state, the melt viscosity can be improved by adding a cooling device to the shaft seal, and the sealing effect is enhanced.

At present, more and more polyester production lines are continuous and large-scale production lines, the disjointing of production procedures caused by equipment maintenance or replacement has great influence on the product yield, and the loss is huge after production stoppage. The shaft seal of fuse-element gear pump adopts compressed air cooling among the present polyester apparatus for producing, its cooling structure lets in compressed air in the shaft seal cooling medium runner, utilize compressed air flow to take away the heat, however because compressed air influences temperature variation great along with external environment, it is not stable enough to the cooling of shaft seal, it is little unstable when big time when making the hourglass material volume of fuse-element gear pump, can influence the discharging efficiency and the shaft seal life-span of fuse-element gear pump like this, thereby influence production and must make production have very big fluctuation because of overhaul of equipments or change, will cause serious loss for the enterprise. On the other hand, the air compressor is an electric tiger, so that the use cost of the compressed air is higher.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a fuse-element gear pump bearing seal cooling device in order to solve the not enough of above-mentioned technique, it is stable to the cooling effect of fuse-element gear pump bearing seal.

In order to achieve the purpose, the utility model discloses a fuse-element gear pump bearing seal cooling device, including the bearing seal of fuse-element gear pump, be provided with the coolant runner on the bearing seal, the hybrid tube is connected to the one end of coolant runner, the outlet duct is connected to the other end of coolant runner, the other end of hybrid tube passes through reducing articulate inlet tube, and the inside pipe diameter of inlet tube is less than the inside pipe diameter of hybrid tube, is provided with the motorised valve on the inlet tube, is provided with the intake pipe on the hybrid tube, and the inside pipe diameter of intake pipe is less than the inside pipe diameter of hybrid tube, the intake pipe is connected with the air compressor who sets up in addition.

According to the technical scheme, in the actual production process, the electric valve is controlled by an additionally arranged control system and is used for controlling the mixing proportion of water and compressed air in the water inlet pipe. The inlet amount of the compressed air is set to be a certain amount, and the opening and closing angle of the electric valve is controlled by monitoring the shaft end material leakage amount through the control system. Under the normal use state, the melt gear pump has a little material leakage amount and the leaked material is powder because of the sealing connection structure of the shaft and the shaft seal. When monitoring axle head material leakage volume grow or the material coking hanging scroll that leaks, it explains that the proportion of water is low and compressed air risees the temperature that makes the bearing seal after cooling by ambient temperature influence and becomes uprise, and melt temperature high mobility is strong, and the opening angle grow of control system control motorised valve increases promptly and the mix proportion of compressed air, carries out the heat transfer cooling to the bearing seal of melt gear pump after the water atomization, and the water gasification is arranged the air from the blast pipe after the heat transfer, the stability of the material leakage volume of control axle head. Because of compressed air's cost is higher than water, adopt compressed air and water mixed mode cooling, the cost is reduced, and make the cooling effect of bearing seal more stable through the mixed proportion of regulation water, the life of bearing seal improves.

Preferably, a pressure reducing valve is provided in the intake pipe. The pressure reducing valve is controlled by an additionally arranged control system and is used for controlling the on-off of the compressed air in the air inlet pipe and stabilizing the introduction amount of the compressed air.

The utility model provides a fuse-element gear pump bearing seal cooling device adopts the mode cooling that compressed air and water mix, compares exclusive use compressed air, and the volume of mixing through the regulation water makes the cooling effect of bearing seal more stable to the life of bearing seal improves, has reduced cost of maintenance, has reduced the influence to production, and the volume of leaking of axle head also can be controlled.

Drawings

Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention;

FIG. 2 is a schematic structural view of the present invention;

in the figure: 1. shaft sealing; 2. a cooling medium flow passage; 3. a mixing tube; 4. an air outlet pipe; 5. a reducing joint; 6. a water inlet pipe; 7. an air inlet pipe; 8. an air compressor; 9. an electrically operated valve; 10. a pressure reducing valve.

Detailed Description

The invention is further described by the following embodiments in conjunction with the accompanying drawings.

Example 1:

as shown in fig. 1, the shaft seal cooling device of the melt gear pump described in this embodiment includes a shaft seal 1 of the melt gear pump, a cooling medium flow channel 2 is disposed on the shaft seal 1, one end of the cooling medium flow channel 2 is connected to a mixing tube 3, the other end of the cooling medium flow channel 2 is connected to an air outlet tube 4, the other end of the mixing tube 3 is connected to an inlet tube 6 through a reducing joint 5, an inner tube diameter of the inlet tube 6 is smaller than an inner tube diameter of the mixing tube 3, an electric valve 9 is disposed on the inlet tube 6, an air inlet tube 7 is disposed on the mixing tube 3, an inner tube diameter of the air inlet tube 7 is smaller than the inner tube diameter of the mixing tube 3, and the air inlet.

Example 2:

as shown in fig. 2, the shaft seal cooling device of the melt gear pump according to the present embodiment is provided with a pressure reducing valve 8 on an inlet pipe 3 in addition to embodiment 1.

Claims

1. The utility model provides a fuse-element gear pump bearing seal cooling device, includes fuse-element gear pump's bearing seal (1), is provided with coolant runner (2) on bearing seal (1), its characterized in that: mixing tube (3) is connected to the one end of coolant medium runner (2), outlet duct (4) is connected to the other end of coolant medium runner (2), inlet tube (6) is connected through reducing joint (5) to the other end of mixing tube (3), and the inside pipe diameter of inlet tube (6) is less than the inside pipe diameter of mixing tube (3), is provided with motorised valve (9) on inlet tube (6), is provided with intake pipe (7) on mixing tube (3), and the inside pipe diameter of intake pipe (7) is less than the inside pipe diameter of mixing tube (3), intake pipe (7) are connected with the air compressor (8) that set up in addition.

2. The melt gear pump shaft seal cooling device of claim 1, wherein: a pressure reducing valve (10) is provided in the intake pipe (7).