CN203214392U

CN203214392U - Double-blocking cartridge mechanical seal

Info

Publication number: CN203214392U
Application number: CN 201320167240
Authority: CN
Inventors: 付勇
Original assignee: AIZHI (NANJING) ENVIRONMENTAL PROTECTION PIPE CONNECTOR TECHNOLOGY Co Ltd
Current assignee: Environmental Gasket Co ltd
Priority date: 2013-04-07
Filing date: 2013-04-07
Publication date: 2013-09-25
Anticipated expiration: 2023-04-07

Abstract

Provided is a double-blocking cartridge mechanical seal. A sealing cavity and a blocking cavity are integrated on the integral axial end face to be sealed, the sealing cavity is composed of the water distributing ring inner cavity face, the moving seal ring excircle face, the static seal ring excircle face, the static ring seat outer contour face, the shaft sleeve excircle face, the press cover ring inner cavity face and the partition ring inner cavity face. The blocking cavity is composed of a baffle ring inner cavity face, the shaft sleeve outer end face, the press cover ring inner cavity face and the partition ring outer contour face. The sealing cavity and the blocking cavity are separated by a partition ring and are communicated through a gap of a matching face between the partition ring and a shaft sleeve. The partition ring inner cavity face is matched with the shaft sleeve outer side face provided with a plurality of continuous equal-width spiral grooves in a gap mode, and a water inlet and a water outlet are formed in a press cover excircle and are communicated with the sealing cavity and the blocking cavity for form a loop. When the mechanical seal operates, the spiral grooves on the shaft sleeve outer side face can speed up cooling water circulating flow and improve the cooling efficiency. The partition ring inner diameter is matched with a rotary shaft in a gap mode, a sealing medium and cooling water are effectively blocked, the mechanical seal is protected, the service life is prolonged, and the operation cost is saved.

Description

Two obstruct integrated mechanical sealings

Technical field

The utility model relates to the mechanical seal field, especially a kind of two integrated mechanical sealings that intercept.

Background technique

At present, in use there is a following difficult problem in the mechanical seal for pump in the hot water cyclesystem: 1, because medium temperature is higher, if abundant inadequately to the mechanical seal cooling, very easily cause damage to cause revealing to machine envelope friction pair and static seal.2, working life shorter, need shut down at equipment and down change mechanical seal continually, thereby cause causing economic loss.3, in a single day mechanical seal leak, and a large amount of high-temperature high pressure waters, gas mixture splash are abnormally dangerous.

The model utility content

The purpose of this utility model is to overcome above-mentioned deficiency, for mechanical seal is reliablely and stablely moved, prolonged mechanical seals working life, force cooling to become key point to mechanical seal, a kind of two integrated mechanical sealing that intercepts is provided, himself has pump circulation mechanism, can impel cooling water to flow fast, thereby reach the purpose to the mechanical seal quick heat radiating, the assurance mechanical sealing linkage ring is worked under the environment of relative low temperature with stationary ring.

The purpose that the utility model is is achieved in that a kind of two integrated mechanical sealing that intercepts, and is the axial end sealing that is loaded on one by Seal cage and obstruct chamber collection; Seal cage is by a minute water ring inner cavity surface, moving, the stationary seal ring periphery, the stationary seat external profile surface, the sleeve outer circle face, the gland ring inner cavity surface, the spacer ring inner cavity surface constitutes, divide water ring to be arranged in the gland ring inner chamber, divide water ring external diameter and gland ring groove internal diameter drive fit, one axle sleeve is set, be locked on the running shaft by the screw one on the retaining ring, axle sleeve one end is provided with axial notch, rotary packing ring is fixedly set in the groove, the rotary packing ring external diameter is tightly fixed by footpath on O type rubber ring two and pin two and the groove, stationary seal ring is arranged on away from axle sleeve groove one end, stationary seal ring external diameter and stationary seat inner chamber closely cooperate, stationary seat is slidingly matched by the internal diameter of pin one and O type rubber ring one and gland ring, stationary seat one end face pushes mutually with the axle spring that is installed in the gland ring, and stationary seal ring other end and rotary packing ring are away from the end face sliding contact of groove; Intercepting the chamber is made of baffle rings inner cavity surface, axle sleeve exterior edge face, gland ring inner cavity surface, spacer ring external profile surface, baffle rings is arranged on the axle sleeve groove ends outside, gapped between baffle rings and the running shaft, baffle rings closely cooperates by O RunddichtringO and gland ring inner chamber, with jump ring and gland ring axially locating; Spacer ring is arranged between axle sleeve and the baffle rings, and by jump ring and gland ring axially locating, this spacer ring inner cavity surface cooperates with axle sleeve groove ends outer side surface and be gapped, and Seal cage is connected by this gap with the obstruct chamber, and is gapped between spacer ring and the baffle rings; Axle sleeve groove ends outer side surface is coniform, evenly is provided with some continuous wide spiral chutes on this conical surface, and this spiral chute rotation direction can be left-handed and dextrorotation; The spacer ring inner cavity surface is conical surface, and described Seal cage and intercept the chamber and separated by spacer ring matches with axle sleeve outside conical surface and gapped, Seal cage and intercept the chamber and be connected by this gap; The gland ring cylindrical is provided with water inlet and osculum, and the water inlet is connected with Seal cage by the radially small through hole on minute water ring cylindrical, and osculum is connected with the obstruct chamber; Water ring was cylindric in described minute, divided the water ring circumference evenly to be provided with some radially small through hole, and the gland ring arranged outside has positioning block and axle sleeve to be connected and fixed to be one.During the mechanical seal running; cooling water is entered by the water inlet under the effect of spiral chute pump school, enters into Seal cage by the radially small through hole on minute water ring, and rubbing surface is carried out entering into the obstruct chamber fast after the heat exchange; because the iris action of baffle rings; cooling water flows out from osculum, forms a circulation loop, thereby rotary packing ring and stationary seal ring are formed quick cooling; improve cooling effectiveness; protection mechanical seal increases the service life, and saves operating cost.

Working principle of the present utility model and advantage thereof and effect:

PLAN23 auxiliary seal system is adopted in this model utility mechanical seal, is applicable to hot aqueous medium's pump, can allow small quantities of particles or fouling.

Before the device start, " the U-shaped groove " that pass on the mechanical seal cover ring with bolt is fixed on mechanical seal on the equipment, after the retaining ring of axle sleeve tail end is lock onto on the equipment axis by Cock screw, at last with the positioning block removal.

During running, mechanical seal sleeve, rotary packing ring rotate with the axis under running shaft drives together, because the mechanical seal sleeve end face is conical surface, evenly be provided with some continuous wide spiral chutes on this conical surface, this spiral chute rotation direction can be left-handed and dextrorotation, and its rotation direction should be identical with the running shaft rotation direction, and the lining inner chamber matches with the axle sleeve conical surface and be gapped, this constructor closes the fluidics principle, for cooling water provides driving source; Cooling water enters into gland ring and divides water ring formed cavity from the gland ingress, evenly be provided with radial hole owing to divide on the water ring circumference, and cooling water evenly enters into Seal cage by each aperture, has played the evenly effect of cooling of dynamic and static seal ring; Because axle sleeve is provided with spiral chute, under the spiral chute pumping action, the cooling water of process heat exchange enters by the gap between axle sleeve and lining fast and intercepts the chamber; Be provided with baffle rings owing to intercept the chamber, and with running shaft micro-gap arranged, play throttling action, cooling water meets obstructions in intercepting the chamber, and is more difficult to get access in sealing medium, so enter into osculum by intercepting the chamber fast, forms a sealed circuit thus; Because the throttling action of baffle rings, effectively stop high temperature media to enter in the mechanical seal cavity, and can effectively stop cooling liquid to enter into the equipment Seal cage, play good effect of heat insulation, also better protection the dynamic and static seal ring of mechanical seal be not subjected to temperatures involved; Because the flow direction of cooling water is for from inside to outside, low temperature water through external heat exchanger is evenly cooled off seal ring earlier, the back contacts with high temperature media, take away medium part heat, improved cooling effectiveness, make the mechanical seal inside temperature be subjected to medium influence less, guaranteed stability and the reliability of mechanical seal like this, the working life of prolonged mechanical sealing.

Description of drawings

Fig. 1, be the utility model general structure schematic representation.

Fig. 2, the utility model schematic cross-section.

Fig. 3, be branch water ring schematic representation.

Fig. 4, be the axle sleeve schematic representation.

Fig. 5, axle sleeve A are to tangent plane dextrorotation schematic representation.

Fig. 6, axle sleeve A are to the left-handed schematic representation of tangent plane.

Wherein icon 1, screw one; 2, retaining ring; 3, O type rubber ring one; 4, pin one; 5, stationary seat; 6, stationary seal ring; 7, rotary packing ring; 8, O type rubber ring two; 9, pin two; 10, the O RunddichtringO three; 11, axle sleeve; 12, spacer ring; 13, baffle rings; 14, running shaft; 15, positioning block; 16, screw two; 17, divide water ring; 18, gland ring; 19, jump ring one; 20, the O RunddichtringO four; 21, jump ring two; 22, pad; 23, axle spring; 24, water inlet; 25, osculum; 26, Seal cage; 27, intercept the chamber.

Embodiment

The utility model is described in further detail below in conjunction with accompanying drawing and example.

Referring to Fig. 1-6, a kind of two integrated mechanical sealings that intercept are by Seal cage 26 and intercept the axial end sealing that chamber 27 collection are loaded on one; Seal cage 26 is by minute water ring 17 inner cavity surface, rotary packing ring 7 peripheries, stationary seal ring 6 peripheries, stationary seat 5 external profile surfaces, axle sleeve 11 peripheries, gland ring 18 inner cavity surface, spacer ring 12 inner cavity surface constitute, divide water ring 17 to be arranged in gland ring 18 cavitys, divide water ring 17 external diameters and gland ring 18 inner groovy internal diameter drive fits, one axle sleeve 11 is set, be locked on the running shaft by the screw 1 on the retaining ring 2, axle sleeve 11 1 ends are provided with axial notch, rotary packing ring 7 is fixedly set in axle sleeve 11 grooves, rotary packing ring 7 external diameters are tightly fixed by footpath on O type rubber ring 28 and pin 29 and the groove, stationary seal ring 6 is arranged on away from axle sleeve 11 grooves one end, stationary seal ring 6 external diameters and stationary seat 5 inner chambers closely cooperate, stationary seat 5 is slidingly matched by the internal diameter of pin 1 and O type rubber ring 1 and gland ring 18, stationary seat 5 one end faces push mutually with the axle spring 23 that is installed in the gland ring 18, and stationary seal ring 6 other ends and rotary packing ring 7 are away from the end face sliding contact of groove; Intercepting chamber 27 is made of baffle rings 13 inner cavity surface, axle sleeve 11 exterior edge faces, gland ring 18 inner cavity surface, spacer ring 12 external profile surfaces, baffle rings 13 is arranged on the axle sleeve 11 groove ends outside, gapped between baffle rings 13 and the running shaft 14, baffle rings 13 closely cooperates by O RunddichtringO 4 20 and gland ring 18 inner chambers, with jump ring 2 21 and gland ring 18 axially locating; Spacer ring 12 is arranged between axle sleeve 11 and the baffle rings 13, by jump ring 1 and gland ring 18 axially locating, these spacer ring 12 inner cavity surface cooperate with axle sleeve 11 groove ends outer side surfaces and are gapped, and Seal cage 26 and obstruct chamber 27 are connected by this gap, and be gapped between spacer ring 12 and the baffle rings 13; Axle sleeve 11 groove ends outer side surfaces are coniform, evenly be provided with some continuous wide spiral chutes on this conical surface, this spiral chute rotation direction can be left-handed and dextrorotation, gland ring 18 cylindricals are provided with water inlet 24 and osculum 25, water inlet 24 is connected with Seal cage 26 by the radial direction through hole on minute water ring 17 cylindricals, and osculum 25 is connected with obstruct chamber 27; Gland ring 18 arranged outside have positioning block 15 and axle sleeve 11 to be connected and fixed by screw 16 to be one.During the mechanical seal running, cooling water is entered by water inlet 24 under the spiral chute pumping action, enters into Seal cage 26 by the radially small through hole on minute water ring 17, and rubbing surface is carried out entering into obstruct chamber 27 fast after the heat exchange, because the iris action of baffle rings 13, cooling water flows out from osculum 25, forms a circulation loop, thereby rotary packing ring 7 and static seal 6 rings are formed cooling fast, improve cooling effectiveness, protection mechanical seal increases the service life, and saves operating cost; 10 is that O RunddichtringO three, 22 is pad, direction shown in the arrow be cooling water flow to.

Claims

1. two integrated mechanical sealing that intercepts is characterized in that: the axial end sealing that is loaded on one by Seal cage and obstruct chamber collection; Seal cage is by a minute water ring inner cavity surface, moving, the stationary seal ring periphery, the stationary seat external profile surface, the sleeve outer circle face, the gland ring inner cavity surface, the spacer ring inner cavity surface constitutes, divide water ring to be arranged in the gland inner chamber, divide water ring external diameter and gland ring inner groovy internal diameter drive fit, one axle sleeve is set to be placed on the running shaft, axle sleeve one end is provided with axial notch, rotary packing ring is fixedly set in the groove, the rotary packing ring external diameter is tightly fixed by footpath on O type rubber ring and the groove, stationary seal ring is arranged on away from axle sleeve groove one end, stationary seal ring external diameter and stationary seat inner chamber closely cooperate, stationary seat is slidingly matched by the internal diameter of pin and O type rubber ring and gland ring, and stationary seat one end face pushes mutually with the axle spring that is installed in the gland ring, and stationary seal ring other end and rotary packing ring are away from the end face sliding contact of groove; Intercepting the chamber is made of baffle rings inner cavity surface, axle sleeve exterior edge face, gland ring inner cavity surface, spacer ring external profile surface, baffle rings is arranged on the axle sleeve groove ends outside, gapped between baffle rings and the running shaft, baffle rings closely cooperates by O RunddichtringO and gland ring inner chamber, with jump ring and gland ring axially locating; Spacer ring is arranged between axle sleeve and the baffle rings, and by jump ring and gland ring axially locating, this spacer ring conical cavity face cooperates with axle sleeve groove ends outside conical surface and be gapped, and is gapped between spacer ring and the baffle rings; The gland ring arranged outside has positioning block and axle sleeve to be connected and fixed to be one.

2. according to claim 1 pair intercepts integrated mechanical sealing, and it is characterized in that: described axle sleeve groove ends outer side surface is coniform, evenly is provided with some continuous wide spiral chutes on this conical surface, and this spiral chute rotation direction can be left-handed or dextrorotation.

3. two integrated mechanical sealing that intercepts according to claim 1 is characterized in that: be connected with fitting surface gap between the spacer ring by axle sleeve between the described Seal cage and intercept the chamber and separated by spacer ring, Seal cage and obstruct chamber.

4. according to claim 1 or 3 described two integrated mechanical sealings that intercept, it is characterized in that: the gland ring cylindrical is provided with water inlet and osculum, and the water inlet is connected with Seal cage, and osculum is connected with the obstruct chamber.

5. according to claim 1 pair intercepts integrated mechanical sealing, and it is characterized in that: water ring was cylindric in described minute, divides the water ring circumference evenly to be provided with some radially small through hole.