CN202194856U - Novel mechanical seal for slurry pump - Google Patents

Abstract

The utility model relates to a novel mechanical sealing device for a slurry pump, which mainly comprises a shaft sleeve 3 with a transmission pin 2 and a clamping ring 12, a movable ring base 7, a spring 8, a movable ring 13, a fixed ring 14, auxiliary seals 1, 4, 5, 6 and 10, and the like. The novel mechanical sealing device is characterized in that both the movable ring and the fixed ring are made of hard alloy materials having the advantages of high hardness, high strength, abrasion resistance and impact resistance. The spring is not limited by the size of a shaft diameter and positioned in a closed space so as not to be influenced by solid particles and impurities in a medium. The distance between the transmission pin and the bottom of a pin hole is 8 mm. The clamping ring is used for preventing the movable ring base from being separated from the transmission pin. By means of the structure, the seal can work normally in a range that the axial movement is 8 mm. The seal is unnecessarily washed by external cooling water. The seal is of a container type structure. The device has the advantages of simple structure, convenience for installation, good sealing performance, high economical benefit, low maintenance cost, energy saving and environment friendliness. Long-period non-leakage operation of equipment can be realized. The device is applicable to various types of slurry pumps.

Description

Novel slag stock pump is used mechanical seal

Technical field

The utility model belongs to the seal arrangement of fluid machinery axle head, particularly relates to a kind of novel slag stock pump and uses mechanical seal device

Background technique

Industry slag stock pumps such as oil, chemical industry, metallurgy, electric power exist easy leakage, outstanding problems such as the life-span is short, energy consumption is big, cost height with mechanical shaft end seal always.Like the pump of " mechanical seal practical technique and application " (Sinopec publishing house 2010 April the 1st edition) said introduction of P194 with anti-abrasion of particles mechanical seal (Fig. 9-13); Its design philosophy adopts double mechanical seal, and sealed fluid pressure is higher than pressure medium.Sealing liquid gets into two contact seal planes from the periphery of end face, and its leakage trend is interior leakage.But slurries are all diluted in actual use, and energy input increases; When axial movement value was big, sealing pair was impaired serious in the short time, seal failure; The sealing liquid system is provided and guarantees enough pressure, cost improves greatly, when sealing liquid pressure less than medium or when interrupting little leakages back solid particle and impurity accumulation easy that spring is stuck and follow the string, finally cause seal failure.

Summary of the invention

The object of the invention is intended to above-mentioned technological deficiency, provides the novel slag stock pump of a kind of simple in structure, easy for installation, good airproof performance, energy-conserving and environment-protective to use mechanical seal device.

Its technological scheme is: mainly be made up of axle sleeve 3, rotating seat 7, spring 8, rotating ring 13, stationary ring 14 and the auxiliary seal 1,4,5,6,10 etc. of band driving pin 2 and snap ring 12; Wherein dynamic and static ring is all selected Hardmetal materials for use; It has high hardness, high tenacity, wear-resisting, impact-resistant characteristic; Spring is positioned at airtight space, avoids the influence of solid particle and impurity in the medium; Driving pin is 8 millimeters to the pin-and-hole distance from bottom, and snap ring prevents that rotating seat and driving pin break away from, and this structure makes and is sealed in axial movement value is proper functioning in 8 millimeters the scope; Need not to add the cooling water flushing; The unit loading type structure is adopted in sealing.

Its advantage is: simple in structure, easy for installation; Good seal performance can realize that the equipment long period does not have the running of leakage, and economic benefit is high, low, the energy-saving and environmental protection of maintenance cost.This device is suitable for various types of slag stock pumps.

Description of drawings

Fig. 1 is the structural representation of the embodiment of the invention one.

Fig. 2 is that the structure medi-spring of the embodiment of the invention one is positioned at the confined space schematic representation.

Fig. 3 is an opposing axial movement value key position design diagram in the structure of the embodiment of the invention one.

Among the figure: 1,6,10,19. axle sleeve O shapes circle, 2. driving pin, 3. axle sleeve, 4.O shape circle baffle ring; 5. rotating seat O shape is enclosed, 7. rotating seat, 8. spring, 9. seal driving pin; 11. rotating ring O shape circle, 12. snap rings, 13. rotating rings, 14. stationary rings; 15. stationary ring O shape circle, 16. pump housing O shapes circle, 17. stationary ring stop pins, 18. collection loads.

Embodiment

The present invention is as shown in Figure 1 as power plant's slag stock pump shaft end seal; Rotating ring 11 is fixed together with rotating seat 7, rotates through the driving pin on the axle sleeve 32, and rotating ring 13 all adopts high hardness, high tenacity with stationary ring 14; The Hardmetal materials of wear-resisting, shock-resistant load increases the service life greatly.Enclosing 10 by the rotating seat O of A place shape circle 5, O shape circle baffle ring 4 and the O of B place shape, to form confined space as shown in Figure 2, and spring 8 is avoided the influence of solid particle and impurity in the medium.Among design, fit system such as Fig. 3 of snap ring 12, driving pin 2 and transmission pin-and-hole shown in C, the D, when axle by C during to D direction play, the design of driving pin 2 and the pin-and-hole degree of depth guarantees to be sealed in proper functioning in the scope that axial movement value is 8 millimeters to the maximum; When the C direction play, snap ring 12 guarantees that driving pins do not break away from rotating seat to axle by D.Spring 8 is selected diameter and the bigger single spring in silk footpath for use, can resist radially bigger play.The present invention need not to introduce cooling water from the external world, and promptly simplified system has reduced cost, again energy-saving and environmental protection.The present invention adopts the unit loading type structure, increases collection load 18 and makes and be sealed in the decrement of assembling when accomplishing the rear spring decrement and being seal operation, need not to adjust once more, is convenient to install and dismounting.The present invention is applicable to various types of slag stock pumps, thoroughly solved former sealing working life short, energy consumption is big, efficient is low, poor anti jamming capability, be prone to the problem of leaking, and has realized the modern production new concept of energy-saving and environmental protection.

Claims (1)

1. a novel slag stock pump is used mechanical seal; Mainly be made up of axle sleeve (3), rotating seat (7), spring (8), rotating ring (13), stationary ring (14) and auxiliary seal (1), (4), (5), (6), (10) of band driving pin (2) and snap ring (12), it is characterized in that: rotating ring (13), stationary ring (14) are all selected Hardmetal materials for use; Spring (8) is positioned at airtight space, avoids the influence of solid particle and impurity in the medium; Driving pin (2) is 8 millimeters to the pin-and-hole distance from bottom, and snap ring (12) prevents that rotating seat (7) and driving pin (2) break away from, and this structure makes and is sealed in axial movement value is proper functioning in 8 millimeters the scope; Need not to add the cooling water flushing; The unit loading type structure is adopted in sealing.

Images