CN201187474Y

CN201187474Y - Non-flushing seal device for elastic element external pump

Info

Publication number: CN201187474Y
Application number: CNU200820080862XU
Authority: CN
Inventors: 宋鹏云; 赵骏; 王静; 胡明辅; 别玉
Original assignee: Kunming Jiahe Science & Technology Development Co Ltd; Kunming University of Science and Technology
Current assignee: KUNMING JIAHE SCIENCE AND TECHNOLOGY Co Ltd; Kunming University of Science and Technology
Priority date: 2008-01-25
Filing date: 2008-01-25
Publication date: 2009-01-28
Anticipated expiration: 2018-01-25

Abstract

The utility model relates to a flushing-free sealing device for an elastic element external pump, and belongs to the fluid mechanical field. A stationary ring of the device is fixed on a pump cover. A rotary ring is connected with a pump shaft in the axial direction in a sliding manner. An elastic element disposed on outside the pump cover acts in the direction of the rotary ring pressing the stationary ring. The pump shaft outside the pump cover is hinged with a flying iron. A force transferring end of the flying iron acts in the direction of the rotary ring detaching from the stationary ring. When the pump operates, the rotary ring detaches from the stationary ring under the actions of the flying iron centrifugal force and internal and external pressure differences of a pump cavity, and the elastic element is further compressed. When the pump is stopped, the centrifugal action of the flying iron disappears, and the rotary ring is tightly closed with the stationary ring for sealing under the common action of the reset force of the elastic element and the medium pressure. The device does not any flushing and lubricating device, has the simple structure, can reduce the contact friction, and prolong the service life of the sealing member.

Description

The elastic element external pump is with there not being the flushing seal arrangement

Technical field

The utility model relates to a kind of elastic element external pump with there not being the flushing seal arrangement, belongs to the shaft sealing field of fluid machinery.

Background technique

In research and patent in the past, some adopts transmission wedge wheel and envelope pressure ring to cooperate and realizes parking sealer; Some is recessing on rotating ring, establishes V-shaped ring on the stationary ring, utilizes fed sheet of a media pressure realization parking sealer in the pump; The fluid dynamic that some utilizes back impeller is subjected to displacement flexible sheet, and flexible sheet separates with annulus during driving, and flexible sheet and annulus compress mutually during parking, plays the axial parking sealing effect; Some installs guiding valve between seal casinghousing endoporus and rotating shaft, the rotary packing ring and the guiding valve exterior edge face that are fixed in the rotating shaft constitute Sealing.These parking sealer forms seldom adopt elastic component device, utilize pressure medium, fluid dynamic to realize sealing more, and run stability is not high, and some rotating ring does not separate with stationary ring, so structure is complicated, and contact friction is more, and seal durability is shorter.

Summary of the invention

Technical problem to be solved in the utility model provides a kind of elastic element external pump with there not being the flushing seal arrangement, it is simple in structure, can both guarantee intact sealing in the time of can and stopping in running, both can solve the contact friction wear problem of packing seal and mechanical seal, leakage in the time of can avoiding spiral seal to stop again also can reduce the sealing power consumpiton.

Solving the scheme that technical problem of the present utility model adopts is: stationary ring is fixed on the pump cover, rotating ring and pump shaft are being in axial sliding connection, the elastic element of pump cover arranged outside acts on the direction that rotating ring is pressed to stationary ring, the hinged iron that flies of pump shaft that pump cover is outer flies the iron force transfer end and acts on the direction that rotating ring breaks away from stationary ring.During the pump running, flying under iron centrifugal force and the effect of pump chamber external and internal pressure difference, rotating ring moves inward, and rotating ring and stationary ring are thrown off, and only depends on sub-propeller sealing in the pump chamber, and elastic element is further compressed, and significantly reduces friction; When pump stops, flying the iron centrifugal action and disappear, under the acting in conjunction of elastic element reposition force and pressure medium, rotating ring and stationary ring are adjacent to closure, play seal action.

Concrete technological scheme of the present utility model also comprises: the structure that is in axial sliding connection of rotating ring and pump shaft is, fixed pressure ring on the pump shaft outside pump cover, rotating ring is connected by slippage is secondary with pressure ring again, connecting promotion ring at the overhanging end of rotating ring, flying the iron force transfer end and pressing the inclined-plane that promotes ring with the inclined-plane; The linkage structure of elastic element and rotating ring is, elastic element one end is pressed on the pressure ring, and the other end is pressed on the elastic element bearing of axial slip, the elastic element bearing again by bolt with promote ring and be connected.

Rotating ring adopts the material of self-lubricating property to make, and with the pump shaft opposing side auxiliary seal ring is set; Opposing side at stationary ring and gland also is provided with auxiliary seal ring; The structure of auxiliary seal ring adopt O shape, square or V-arrangement any.

What elastic element adopted is spring or bellows.

The beneficial effects of the utility model are:

The first, pump can both be realized intact sealing when running and parking, has guaranteed the long-term stability operation of equipment, has significantly reduced pump and has leaked waste and the environmental pollution that causes, has eliminated the potential safety hazard of equipment operation;

Rotating ring separated with stationary ring when the second, pump turned round, and had lowered because of fricative wearing and tearing, had greatly prolonged the operating life of Sealing, had reduced overhaul of the equipments and unplanned parking cost;

Three, this device has reduced flushing and lubricated cost without any need for flushing and lubricated;

Four, this apparatus structure is simple, and original pump seal chamber is changed not quite, and assembling is adjusted easily, and user cost is lower.

Description of drawings

Fig. 1 is the structural representation of this device.

Each label is represented successively among the figure: pump cover 1, rotating ring 2, rotating ring auxiliary seal ring 3, stationary ring 4, stationary ring auxiliary seal ring 5, bolt 6, fly iron 7, flying-iron seat 8, elastic element bearing 9, elastic element 10, pressure ring 11, promote ring 12, gland 13.

Embodiment

As shown in Figure 1, stationary ring 4 is fixed in the pilot hole of pump cover 1, fixed pressure ring 11 on the pump shaft outside the pump cover 1, rotating ring 2 is enclosed within on the pressure ring 11, forming the slippage pair by locating stud and pressure ring 11 is connected, the overhanging end of rotating ring 2 is connecting the promotion ring 12 that has the inclined-plane, and the other end end face of rotating ring 2 presses when stopping on stationary ring 4.The a pair of iron 7 that flies is articulated in flying-iron seat 8 and is fixed on the pump shaft again, flies iron 7 force transfer end and is pressing the inclined-plane that promotes ring 12.Elastic element 10 is positioned at gland 13 outsides, can adopt spring or bellows, and the one end is pressed on the pressure ring 11 that is fixed in pump shaft, and the other end is pressed on the elastic element bearing 9 of axial slip, and elastic element bearing 9 is connected with promotion ring 12 by bolt 6 again.When pump turns round, fly iron 7 and be subjected to centrifugal action, launch gradually, stirring promotion ring 12 moves towards the directions that rotating ring 2 breaks away from stationary rings 4, pump chamber external and internal pressure difference also makes rotating ring 2 move to breaking away from stationary ring 4 directions simultaneously, promote ring 12 and drive elastic element bearing 9, elastic element 10 is further compressed; Otherwise when pump stopped, under the acting in conjunction of elastic element 10 reposition forces and pressure medium, rotating ring 2 was pushed rotating ring 12 and is pulled outwardly, and was adjacent to closure with stationary ring 4.In order to guarantee better sealing effect, and do not need flushing and lubricated, rotating ring 2 adopts the material of self-lubricating properties to make, and with the pump shaft opposing side rotating ring auxiliary seal ring 3 is set; Opposing side at stationary ring 4 and gland 13 also is provided with stationary ring auxiliary seal ring 5; The structure of auxiliary seal ring adopt O shape, square or V-arrangement any.

Claims

1, a kind of elastic element external pump is with there not being the flushing seal arrangement, it is characterized in that: stationary ring is fixed on the pump cover, rotating ring and pump shaft are being in axial sliding connection, the elastic element of pump cover arranged outside acts on the direction that rotating ring is pressed to stationary ring, the hinged iron that flies of pump shaft that pump cover is outer flies the iron force transfer end and acts on the direction that rotating ring breaks away from stationary ring.

2, wash seal arrangement by the described elastic element external pump of claim 1 with nothing, it is characterized in that: the structure that is in axial sliding connection of rotating ring and pump shaft is, fixed pressure ring on the pump shaft outside pump cover, rotating ring is connected by slippage is secondary with pressure ring again, connecting promotion ring at the overhanging end of rotating ring, flying the iron force transfer end and pressing the inclined-plane that promotes ring with the inclined-plane; The linkage structure of elastic element and rotating ring is, elastic element one end is pressed on the pressure ring, and the other end is pressed on the elastic element bearing of axial slip, the elastic element bearing again by bolt with promote ring and be connected.

3, elastic element external pump according to claim 2 is characterized in that with there not being the flushing seal arrangement: rotating ring adopts the material of self-lubricating property to make, and with the pump shaft opposing side auxiliary seal ring is set; Opposing side at stationary ring and gland also is provided with auxiliary seal ring; The structure of auxiliary seal ring adopt O shape, square or V-arrangement any.

4, elastic element external pump according to claim 3 is not with there being the flushing seal arrangement, and it is characterized in that: what elastic element adopted is spring or bellows.