CN109519410B

CN109519410B - Integrated mechanical seal for impurity pump

Info

Publication number: CN109519410B
Application number: CN201710844389.1A
Authority: CN
Inventors: 黄忠红; 汤仕芳
Original assignee: HANGZHOU HENGLI PUMP MANUFACTURING CO LTD
Current assignee: HANGZHOU HENGLI PUMP MANUFACTURING CO LTD
Priority date: 2017-09-19
Filing date: 2017-09-19
Publication date: 2020-06-26
Anticipated expiration: 2037-09-19
Also published as: CN109519410A

Abstract

The invention relates to a container type mechanical seal for an impurity pump, which comprises an impeller, a rotating shaft and a pump cover, wherein the pump cover is connected with a static ring seat, a material sealing static ring and a water sealing static ring are arranged in the static ring seat, a push plate and a spring are arranged between the material sealing static ring and the water sealing static ring, a water sealing movable ring is arranged on the outer side of the water sealing static ring, a material sealing movable ring is arranged on the outer side of the material sealing static ring, the material sealing movable ring is connected with a movable ring seat, and the water sealing movable ring, the material sealing movable ring and the movable ring seat can rotate along with the rotating. The mechanical sealing structure is designed according to the special process characteristics of conveying the medium containing impurities, so that the material cost is reduced, the use and maintenance process is simplified, and the service life of the mechanical sealing structure is prolonged.

Description

Integrated mechanical seal for impurity pump

Technical Field

The invention relates to a mechanical seal for a pump, in particular to a cartridge mechanical seal for an impurity pump.

Background

With the scale expansion of enterprises such as alumina and paper making and the increasingly finer process technology in the chemical industry, particularly in the process of bauxite processing and smelting, sodium aluminate solution is the most common high-temperature solution which is easy to crystallize, has abrasion resistance and corrosion resistance. In the early years, important station pump equipment such as circulation, material passing and the like of particularly evaporation stations generally depend on inlets. The import pump is high in price, long in supply period, difficult in guarantee of spare parts timeliness rate and the like, and the development of enterprises is seriously restricted, although the import pump can be basically replaced by the domestic pump at present, the defect that the import pump cannot be completely replaced by the domestic pump due to short sealing life is still overcome. The evaporation station uses the pump as a most important pump device for conveying the medium containing impurities or crystallisates, and the mechanical seal is often the most easily and first damaged part on the pump, sometimes the whole system is stopped because the mechanical seal of one pump is damaged. Therefore, ensuring excellent mechanical sealing structure, stable performance and correct maintenance for the pump is a necessary condition for ensuring normal operation of the pump.

Disclosure of Invention

The invention aims to solve the defects of the prior art and provide a cartridge mechanical seal for an impurity pump, and aims to design a mechanical seal structure according to special process characteristics of conveying media containing impurities, reduce material cost and simplify the use and maintenance process, thereby prolonging the service life of the mechanical seal.

The invention adopts the technical scheme for solving the technical problems that: this kind of collection dress formula mechanical seal for trash pump, including impeller, pivot, pump cover, the pump cover is connected with quiet ring holder, is equipped with material seal quiet ring, water seal quiet ring in the quiet ring holder, is equipped with push pedal and spring between material seal quiet ring and the water seal quiet ring, and the quiet ring outside of water seal is equipped with the water seal rotating ring, and the quiet ring outside of material seal is equipped with material seal rotating ring, and material seal rotating ring is connected with the rotating ring holder, and water seal rotating ring, material seal rotating ring can rotate along with the rotating shaft together with the rotating ring holder.

Preferably, an O-shaped ring is arranged between the material sealing movable ring and the movable ring seat, an O-shaped ring is arranged between the material sealing static ring and the static ring seat, an O-shaped ring is arranged between the water sealing movable ring and the rotating shaft, an O-shaped ring is arranged between the water sealing static ring and the static ring seat, an O-shaped ring is arranged between the static ring seat and the pump cover, and an O-shaped ring is arranged between the material sealing movable ring and the impeller.

Preferably, the spring is provided with a protrusion insertion push plate, the push plate is provided with a protrusion insertion static ring seat, the material sealing static ring is provided with a protrusion insertion push plate, and the water sealing static ring is connected with the static ring seat through an anti-rotation pin.

Preferably, the water seal moving ring is pre-compressed by a locking buckle.

The invention has the beneficial effects that: the material that the spring promoted seals quiet ring and the quiet ring mutual compensation of water seal, has both guaranteed sealed vice effective seal, and single spring also reduces the accumulation of impurity in sealed intracavity, the vice probability of inefficacy of greatly reduced seal. All parts are assembled on the static ring seat and can be integrally installed on the rotating shaft without adjusting the specific pressure of sealing, and the cooling water holes on the static ring seat can cool and seal and take away micro impurities leaked by sealing, so that the effective operation of the whole machine seal is ensured; meanwhile, the sealing is integrally assembled, the installation is very simple and convenient, and if the sealing is easy to damage in the using process, the integral fine adjustment can be carried out, so that the sealing using effect is not influenced.

Drawings

FIG. 1 is a schematic structural view of the present invention;

description of reference numerals: the material sealing device comprises a movable ring seat 1, a material sealing movable ring 2, a material sealing static ring 3, a push plate 4, a static ring seat 5, an anti-rotation pin 6, a spring 7, a water sealing static ring 8, a water sealing movable ring 9, a locking buckle 10, an impeller 11, a rotating shaft 12 and a pump cover 13.

Detailed Description

The invention will be further described with reference to the accompanying drawings in which:

example (b): referring to fig. 1, a cartridge type mechanical seal for a trash pump does not include a seal housing. The mechanical seal comprises a material seal moving ring 2, a static ring seat 5 and a water seal moving ring 9, wherein the material seal static ring 3, a push plate 4, a spring 7 and a water seal static ring 8 are arranged in the static ring seat. The material sealing static ring 3 and the water sealing static ring 8 tightly press the material sealing and the water sealing through a push plate 4 and a single spring 7, the spring 7 is a single spring with the wire diameter of 4.5mm, the spring 7 is provided with a bulge inserted push plate 4 close to the material sealing end, the push plate 4 is provided with a bulge inserted static ring seat 5, the material sealing static ring 3 is provided with a bulge inserted push plate 4 to prevent rotation, and the water sealing static ring 8 is fixed on the static ring seat through an anti-rotation pin 6 to prevent rotation; the water seal moving ring 9 determines the initial pretightening force of the water seal through the locking buckle 10 and compresses the water seal. The material sealing movable ring 2 compresses the movable ring seat 1 through an O-shaped ring to separate a medium, and rotates together with the movable ring seat 1 along with the rotating shaft 12 to form material sealing, the material sealing static ring 3 enters the machine sealing inner cavity through the O-shaped ring to separate the medium, the O-shaped ring between the static ring seat 5 and the pump cover 13 prevents the medium from leaking outwards, the water sealing static ring 8 and the static ring seat 5 are sealed, and the water sealing movable ring 9 and the rotating shaft 12 block the leakage of sealing cooling water through the O-shaped ring.

The integrated mechanical seal does not use a mechanical seal shaft sleeve, the size of related accessories is correspondingly reduced, the leakage area is also obviously reduced, and the material of the mechanical seal is greatly saved. The material of the material sealing moving ring 2 is embedded in the moving ring by adopting a hard alloy material to form an integral moving ring, the material sealing moving ring is wear-resistant and corrosion-resistant, the cost of integral hard alloy is greatly reduced, and the moving ring 2 and the moving ring seat 1 are sealed by adopting an O-shaped ring. The material sealing static ring 3 is made of hard alloy and is embedded in the static ring to form an integral static ring, the static ring is wear-resistant and corrosion-resistant, the static ring and the static ring seat are sealed by an O-shaped ring, media and sealing water are separated, and the static ring seat is provided with two water holes for cooling and washing impurities, namely one water hole is used for feeding the impurities and the other water hole is used for discharging the impurities. Spring 7 adopts the silk footpath to be 4.5 mm's single spring, and spring 7's the number of turns adopts different numbers of turns according to the difference of sealed friction pair specific pressure, and spring 7 wholly promotes material through push pedal 4 and seals quiet ring 3 and water seal quiet ring 8, forms two dynamic seal around, and two dynamic seal's specific pressure can compensate each other. The mechanical seal and the impeller 11 are sealed by adopting an O-shaped ring to prevent a medium from leaking onto the shaft, and the material sealing movable ring seat 1 adopts a wedge shape to tightly hold the rotating shaft 12 to rotate together with the material sealing movable ring seat. The static ring seat 5 is provided with an anti-rotation pin 6 for preventing the water seal static ring 8 from slipping, and the static ring seat 5 and the pump cover 13 prevent medium leakage through an O-shaped ring. The specific pressure of the water seal movable ring and the water seal static ring is pre-compressed through the locking fastener 10, the locking fastener is loosened after the water seal movable ring is assembled in a sealing mode, the position of the water seal movable ring can also be adjusted, and then the screw is locked, so that the good sealing effect can be guaranteed in any state of the sealing. The material seal moving ring 2, the static ring 3 and the static ring seat 5 are made of CD4MCu dual-phase steel materials, and the water seal static ring 8 and the moving ring 9 are made of 304 stainless steel, so that the material seal moving ring is corrosion-resistant and abrasion-resistant.

The static ring seat 5 integrates all sealing parts together, the overall sealing size of the mechanical seal is not affected by the pump cover 13 and the rotating shaft 12, the position can be adjusted, and the difficulty of actual operation is greatly reduced. Therefore, the maintenance frequency of pump equipment is reduced, the actual service life of the seal is 8 to 10 months longer than that of the mechanical seal of the impurity pump which is commonly used in the past, the structure is simple, the processing is convenient, the universality degree is high, and the on-site maintenance cost is greatly reduced.

In addition to the above embodiments, the present invention may have other embodiments. All technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope of the claims of the present invention.

Claims

1. The utility model provides a collection dress formula mechanical seal for trash pump, includes impeller (11), pivot (12), pump cover (13), characterized by: pump cover (13) are connected with quiet ring seat (5), be equipped with material seal quiet ring (3) in quiet ring seat (5), water seal quiet ring (8), be equipped with push pedal (4) and spring (7) between material seal quiet ring (3) and water seal quiet ring (8), water seal quiet ring (8) outside is equipped with water seal rotating ring (9), material seal quiet ring (3) outside is equipped with material seal rotating ring (2), material seal rotating ring (2) are connected with rotating ring seat (1), water seal rotating ring (9), material seal rotating ring (2) can rotate along with rotating shaft (12) with rotating ring seat (1), spring (7) are equipped with the arch and insert push pedal (4), be equipped with the arch on push pedal (4) and insert quiet ring seat (5), be equipped with the arch on material seal quiet ring (3) and insert push pedal (4), water seal quiet ring (8) are connected with quiet ring seat (5) through preventing spacer pin (6).

2. The integrated mechanical seal for a trash pump according to claim 1, wherein: an O-shaped ring is arranged between the material sealing movable ring (2) and the movable ring seat (1), an O-shaped ring is arranged between the material sealing static ring (3) and the static ring seat (5), an O-shaped ring is arranged between the water sealing movable ring (9) and the rotating shaft (12), an O-shaped ring is arranged between the water sealing static ring (8) and the static ring seat (5), an O-shaped ring is arranged between the static ring seat (5) and the pump cover (13), and an O-shaped ring is arranged between the material sealing movable ring (2) and the impeller (11).

3. The integrated mechanical seal for a trash pump according to claim 1, wherein: the water seal movable ring (9) is pre-compressed through a locking buckle (10).