CN213478677U

CN213478677U - Leakage-free mechanical seal filter press feeding pump

Info

Publication number: CN213478677U
Application number: CN202022235250.7U
Authority: CN
Inventors: 田兴华; 董义峰; 孙厚江; 许海波; 任永杰; 刘伟
Original assignee: Shandong Luhai Heavy Industry Co ltd
Current assignee: Shandong Luhai Heavy Industry Co ltd
Priority date: 2020-10-10
Filing date: 2020-10-10
Publication date: 2021-06-18
Anticipated expiration: 2030-10-10

Abstract

The utility model discloses a leakage-free mechanical seal filter press feeding pump, which comprises a shaft coupling, wherein the shaft coupling is connected with a pump shaft fixed on a bracket, the bracket is connected with a rear pump body, the rear pump body is fixedly connected with a front pump body, and a suction pipe and a discharge pipe are connected on the pump body; the pump is characterized in that a rear guard plate is arranged on a rear pump body, an impeller is arranged at the right end of a pump shaft, a volute is arranged on the rear guard plate, a front pump body is fixedly connected with a front guard plate, and a coupler drives the impeller to rotate through the pump shaft; the rear part of the pump shaft is provided with a dismounting ring and a shaft sleeve, and the shaft sleeve is provided with a mechanical seal; the mechanical seal is connected with the static ring seat and then positioned on a spigot of the rear pump body, and the rear guard plate tightly presses the right end of the static ring seat; the novel energy-saving type hydraulic pump has the advantages of high efficiency, good sealing performance, obvious energy-saving effect, good abrasion resistance, long service life of the flow passage part, reasonable structure and convenience in installation and maintenance, and can pass through larger particles.

Description

Leakage-free mechanical seal filter press feeding pump

Technical Field

The utility model relates to a pressure filter technical field, specifically say that a mechanical seal pressure filter feeding pump that does not have leakage, mainly used in the pressure filter.

Background

At present, the using amount of a feeding pump is large in the production of a titanium dioxide factory, an alkali factory, aluminum industry, electrolytic aluminum, a power plant and a coal washing factory, but the sealing form of the feeding pump is always a problem; the sealing form of the feeding pump has developed several generations of sealing structures, packing sealing → dry mechanical sealing → water injection single end face mechanical sealing; the packing seal (as shown in figure 2) has obvious defects, and the packing is changed at intervals, which is obviously not suitable for the requirement of the feeding pump; the dry mechanical seal generates high temperature when the friction pair rotates, and the moving ring and the static ring are burnt due to the high temperature, so the dry mechanical seal is not durable and has short service time; although the water injection single-end-face mechanical seal (as shown in fig. 3) solves the problem of high temperature generated by the rotation of a friction pair by injecting cooling water, the single-end-face mechanical seal is not ideal in structural sealing effect, material leakage is caused after the end face is abraded, and the service life is also insufficient; the sealing structures cannot meet the use requirements, along with the technical progress and the updating of factory equipment, the requirements on the performance of the feeding pump are higher and higher, and a leakage-free sealing form is required.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art and provide a leakage-free feeding pump of a mechanical seal filter press; the main feeding pump that solves current income material pump leaks material, efficiency is not high, the unable operation requirement scheduling problem that satisfies of performance.

The utility model provides a technical scheme is: a leakage-free mechanical seal filter press feeding pump comprises a coupler, wherein the coupler is connected with the front end of a shaft, and the shaft is fixed on a bracket after being provided with a bearing; the bearing of the shaft is pressed by a bearing gland, the bearing gland is fixed on a bracket, the bracket is fixedly connected with the rear pump body, and the rear pump body is fixedly connected with the front pump body; the feed inlet of the front pump body is connected with a suction pipe, and the discharge pipe is fixed at the upper end of the volute; the pump is characterized in that a rear guard plate is fixedly arranged on the rear pump body; the rear end of the shaft is provided with an impeller; the rear guard plate is provided with a volute; the front pump body is fixedly connected with the front guard plate; the shaft coupling is connected with the motor shaft coupling, the motor rotates to drive the shaft coupling, the shaft coupling drives the shaft to rotate, and the shaft drives the impeller to rotate; the rear part of the shaft is provided with a disassembling ring and a shaft sleeve, the disassembling ring and the shaft sleeve are positioned between a rear bearing of the shaft and the impeller, and the shaft sleeve is provided with a mechanical seal; the mechanical seal is connected with the static ring seat, the excircle of the static ring seat is positioned on the spigot of the rear pump body after the static ring seat and the mechanical seal are assembled, and the rear guard plate compresses the right end of the static ring seat.

Furthermore, the mechanical seal comprises an outer pushing ring, the outer pushing ring is fixed on the shaft sleeve, an outer moving ring is embedded on the outer pushing ring through a cylindrical pin, an outer static ring is tightly pressed and sealed with the outer moving ring through a spring, the outer static ring is fixedly connected with one end of a connecting flange, the other end of the connecting flange is fixedly connected with an inner pushing ring, the inner pushing ring is connected with an inner static ring, the inner static ring is tightly pressed and sealed with the inner moving ring through the spring, and the inner moving ring is fixed on the shaft sleeve.

Furthermore, the bracket is formed by fixedly connecting an upper bracket cover and a lower bracket.

The utility model has the advantages that:

1. the efficiency is high, and the energy-saving effect is obvious; the feeding pump fully considers the flowing condition of solid particles in the pump, so that the molded line of the overflowing part basically conforms to a medium flowing trace line, the medium flow can be better dredged, and the medium flow flows with the minimum energy loss, so that the energy conversion is good, the efficiency is high, and the energy-saving effect is very obvious; actually, the series of pump products are 8-12 percent higher than the traditional impurity pump efficiency on average and 5 percent higher than the Wolman pump efficiency on average; meanwhile, the two-phase flow theory takes slag and impurity materials as a research main body, so that the efficiency of conveying slurry materials is higher than that of clear water, and the average efficiency is 4-6 percent higher;

2. the abrasion resistance is good, and the service life of the flow passage component is long; under the guidance of a two-phase flow theory, the molded line design of the overflowing part is matched with a medium flow trace to a great extent, so that the scouring and impact wear of the overflowing part is greatly reduced and the abrasion of materials is reduced during the pumping process of the medium. On the basis, advanced wear-resistant materials are used as auxiliary materials, so that the service life of the flow passage component is greatly prolonged by 3-6 times compared with that of the traditional impurity pump;

3. the anti-cavitation performance is good, and the high-position arrangement can be realized;

4. the flow cross section area is large, and larger particles can pass through;

5. it is rational in infrastructure, have the dismantlement ring, can't dismantle after preventing the impeller chucking, installation easy maintenance.

Drawings

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

FIG. 2 is a schematic diagram of a prior art packing arrangement;

FIG. 3 is a schematic view of a conventional mechanical sealing structure for water injection;

fig. 4 is a schematic view of the working principle of the mechanical sealing structure of the present invention.

Detailed Description

For a better understanding and practice, the following detailed description of the embodiments is given in conjunction with the accompanying drawings; the illustrated embodiments are provided to explain the present invention and not to limit the scope of the invention.

As shown in fig. 1 and 4, a leakage-free mechanical seal filter press feeding pump comprises a coupling 1, wherein the coupling 1 is connected with the front end of a shaft 2 through a key, the shaft 2 is fixed on a bracket 10 after being provided with a bearing, the bracket 10 is divided into an upper part and a lower part, the upper part is provided with a support cover, the lower part is provided with a lower bracket, and the support cover is connected with the lower bracket through a bolt; the front bearing and the rear bearing are tightly pressed by bearing pressing covers, the bearing pressing covers are fixed on a bracket 10 through bolts, a rear pump body 6 is connected with the bracket 10 through bolts, and a front pump body 9 is connected with the rear pump body 6 through pump body bolts; a disassembly ring 3 and a shaft sleeve 4 are installed at the rear part of a shaft 2, a mechanical seal 11 is installed on the shaft sleeve 4, the mechanical seal 11 and a stationary ring seat 5 are connected through a screw hole on the stationary ring seat 5 by a bolt, and the excircle of the stationary ring seat is positioned on the spigot of a rear pump body 6 after the stationary ring seat 5 and the mechanical seal 11 are assembled;

the mechanical seal 11 comprises an outer pushing ring 24, the outer pushing ring 24 is fixed on the shaft sleeve 4 through an inner hexagonal set screw 25, an outer moving ring 26 is embedded on the outer pushing ring 24 through a cylindrical pin 46, an outer static ring 27 is positioned on a connecting flange 29 through a cylindrical pin 28, a connecting pipe G3/8' 30 is machined on the connecting flange 29, the outer static ring 27 is connected with a spring 41, and the outer moving ring 26 is positioned through the cylindrical pin 46 and fixed on the shaft sleeve 4; the outer static ring 27 is connected with one end of a connecting flange 29 through a cylindrical pin 28, the other end of the connecting flange 29 is connected with an inner push ring 32 through a transmission pin 31, an inner static ring 33 is connected with the inner push ring 32, and an inner dynamic ring 34 is positioned on the shaft sleeve 4 through a cylindrical pin 35; positioning a first O-shaped seal 37 on the spigot of the shaft sleeve 4, a second O-shaped seal 38 on the mating surface of the inner stationary ring 33 and the shaft sleeve 4, a third O-shaped seal 39 on the sealing surface of the inner stationary ring 33 and the connecting flange 29, and a fourth O-shaped seal 40 on the mating sealing surface of the connecting flange 29 and the stationary ring seat 5; then, a positioning block 44 is pressed on the connecting flange 29 through an inner hexagonal socket head cap screw 42, a fifth O-shaped seal 43 is positioned on the matching surface of the outer static ring 27 and the connecting flange 29, and finally a sixth O-shaped seal 45 is arranged on the shaft sleeve 4;

a rear protection plate 12 is arranged on the rear pump body 6 through a spigot of the rear pump body 6 and tightly presses the right end of the static ring seat 5, the rear protection plate 12 and the rear pump body 6 are tightly pressed by bolts, an impeller 13 is screwed with a rear end screw of the shaft 2 through a central screw hole, and a volute 14 is arranged on the rear protection plate 12; after the front guard plate 8 and the front pump body 9 are connected and screwed down through bolts, the front pump body and the rear pump body are connected and fixed through bolts; the suction pipe 15 is connected with the feed inlet of the front pump body 9, and the discharge pipe 7 is connected with the outlet of the volute 14; the shaft coupling 1 is connected with the motor shaft coupling through a pin, the motor rotates to drive the shaft coupling 1, the shaft coupling 1 drives the shaft 2 to rotate, the shaft 2 drives the impeller 13 to rotate, and materials sucked into the short pipe are discharged from the discharge pipe 7 through the impeller 13.

The utility model relates to a leak-free mechanical seal filter press feeding pump, which is designed aiming at the material of the feeding pump by applying the two-phase flow theory; the physical and chemical characteristics of the discharged solid particles and the motion rule of the solid material in the pumping process are fully considered, compared with the existing structural form, the impeller and volute flow channel is widened, the molded lines of the impeller and the volute are improved, so that in the flow channel of the impeller and the volute, the running track of the material is matched with the molded lines of the blades and the molded lines of the volute to the greatest extent, and the energy conversion is good; energy loss is reduced, vibration and noise are reduced, and abrasion of the over-current component is correspondingly reduced;

adopting flushing water to carry out double-end-face mechanical sealing; the sealing device formed by a plane friction pair consisting of two pairs of moving rings and static rings generates proper pressing force on the contact surfaces of the rotating moving rings and the static rings by the pressure of an elastic component and a sealing medium, so that the two end surfaces are tightly attached, and a layer of extremely thin liquid film is maintained between the sealing end surfaces to achieve the purpose of sealing; the liquid film has hydrodynamic pressure and static pressure, and plays roles in lubricating and balancing pressure.

It should be understood that technical features not described in detail in the specification belong to the prior art. Although the embodiments of the present invention have been described with reference to the accompanying drawings, the present invention is not limited to the above-mentioned embodiments, which are only illustrative and not restrictive, and those skilled in the art can make many more forms without departing from the spirit and scope of the present invention.

Claims

1. A leakage-free mechanical seal filter press feeding pump comprises a coupler (1), wherein the coupler (1) is connected with the front end of a shaft (2), and the shaft (2) is fixed on a bracket (10) after being provided with a bearing; a bearing of the shaft (2) is tightly pressed by a bearing gland, the bearing gland is fixed on a bracket (10), the bracket (10) is fixedly connected with a rear pump body (6), and the rear pump body (6) is fixedly connected with a front pump body (9); the feed inlet of the front pump body (9) is connected with a suction pipe (15), and the discharge pipe (7) is fixed at the upper end of the volute (14); it is characterized in that a rear guard plate (12) is fixedly arranged on the rear pump body (6); the rear end of the shaft (2) is provided with an impeller (13); a volute (14) is arranged on the rear protection plate (12); the front pump body (9) is fixedly connected with the front guard plate (8); the coupler (1) is connected with a motor coupler, the motor rotates to drive the coupler (1), the coupler (1) drives the shaft (2) to rotate, and the shaft (2) drives the impeller (13) to rotate; a disassembly ring (3) and a shaft sleeve (4) are arranged at the rear part of the shaft (2), the disassembly ring (3) and the shaft sleeve (4) are positioned between a rear bearing of the shaft (2) and the impeller (13), and a mechanical seal (11) is arranged on the shaft sleeve (4); mechanical seal (11) and stationary ring seat (5) connect, stationary ring seat (5) and mechanical seal (11) equipment back stationary ring seat (5) excircle location are on back pump body (6) tang, back backplate (12) compress tightly stationary ring seat (5) right-hand member.

2. The feed pump of the leakless mechanical seal filter press according to claim 1, wherein the mechanical seal (11) comprises an outer push ring (24), the outer push ring (24) is fixed on the shaft sleeve (4), an outer moving ring (26) is embedded on the outer push ring (24) through a cylindrical pin (46), an outer stationary ring (27) is pressed and sealed with the outer moving ring (26) through a spring (41), the outer stationary ring (27) is fixedly connected with one end of a connecting flange (29), the other end of the connecting flange (29) is fixedly connected with an inner push ring (32), the inner push ring (32) is connected with an inner stationary ring (33), the inner stationary ring (33) is pressed and sealed with the inner moving ring (34) through a spring (41), and the inner moving ring (34) is fixed on the shaft sleeve (4).

3. The filter press feed pump of claim 1, wherein the said bracket (10) is composed of an upper bracket cover and a lower bracket fixed connection.