CN218152505U

CN218152505U - Mechanical sealing element

Info

Publication number: CN218152505U
Application number: CN202222832628.0U
Authority: CN
Inventors: 代福致; 潘浩冬
Original assignee: Zhengzhou University
Current assignee: Zhengzhou University
Priority date: 2022-10-26
Filing date: 2022-10-26
Publication date: 2022-12-27
Anticipated expiration: 2032-10-26

Abstract

The utility model discloses a mechanical sealing element, including connecting pipe one and connecting pipe two, connecting pipe one is located the rear end of connecting pipe two, the same butt joint pipe is installed to the outer lane of connecting pipe one and connecting pipe two and is located the connecting department of connecting pipe one and connecting pipe two, the inner circle of connecting pipe two is by the front end set up the annular, run through the inner circle body of connecting pipe two and be located the rear of annular and set up a plurality of backward flow, the inner circle of connecting pipe one is by front end fixed mounting have a plurality of slide rails, the front end body of running through connecting pipe one and the rear end body of connecting pipe two have all been seted up the seal groove, the inside of two seal grooves is provided with same static seal, the inner circle of connecting pipe one and the rear end that is located the slide rail are provided with sealed slope; a mechanical seal spare, adopt sliding connection's mode to replace the spring to carry on spacingly to the movive seal, reduced the probability of vulnerable part damage, realized the circulation of local circulation simultaneously, prolonged the life of movive seal.

Description

Mechanical sealing element

Technical Field

The utility model relates to a sealing member field, in particular to mechanical sealing member.

Background

The mechanical sealing element belongs to one of precise mechanical basic elements with complex structures, is a key part of equipment such as various pumps, reaction synthesis kettles and the like, is used for various equipment for circulating fluid, except a sealing ring, a one-way check valve can also be classified as one of the mechanical sealing elements, and the scheme particularly relates to the mechanical sealing element; current mechanical seal spare is when using, one-way circulation is realized through spring coupling movive seal to movive seal's fixed spacing, and the spring belongs to vulnerable part, therefore, when the pressure that the movive seal received is too big, the spring is by overstretching or compression, break out easily, perhaps change the original natural elongation of spring, and then influence mechanical seal spare leakproofness, and simultaneously, current mechanical seal spare realizes behind the one-way shutoff, inside unable local cycle, consequently, after the sealing, during the fluid countercurrent, the movive seal can be under the high pressure for a long time, influence the life of movive seal.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a main aim at provides a mechanical seal, can effectively solve the problem in the background art.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a mechanical sealing element, including connecting pipe one and connecting pipe two, connecting pipe one is located the rear end of connecting pipe two, connecting pipe one and the outer lane of connecting pipe two and be located connecting pipe one and the junction of connecting pipe two and install same butt joint pipe, the inner circle of connecting pipe two has been seted up the annular by the front end, the inner circle body that runs through connecting pipe two has just been located the rear of annular and has been seted up a plurality of backward flow way, the inner circle of connecting pipe one has been leaned on front end fixed mounting and has been had a plurality of slide rail, the seal groove has all been seted up to the front end body that runs through connecting pipe one and the rear end body of connecting pipe two, the inside of two seal grooves is provided with same static seal, the inner circle of connecting pipe one and the rear end that is located the slide rail are provided with sealed slope, the inner circle of connecting pipe one and the position that is located sealed slope and slide rail are provided with same dynamic seal.

As a further scheme of the utility model, the movable seal comprises a sealed head, an afterbody and a plurality of runner groove of opening and shutting jointly, and the afterbody that opens and shuts is located the front end of sealed head and is the integration setting with sealed head, and a plurality of runner groove runs through the front and back end of the afterbody that opens and shuts and the rear end of sealed head.

As a further aspect of the present invention, the outer ring of the first connecting pipe is threaded by the inner ring of the front end, the outer ring of the second connecting pipe and the inner ring of the butt joint pipe, and the butt joint pipe is threaded with the first connecting pipe and the second connecting pipe.

As a further aspect of the present invention, the number of the slide rails is half of the number of the circulation grooves, and the movable seal is slidably sleeved with the connecting pipe through the cooperation of the slide rails and the circulation grooves.

As a further aspect of the present invention, the sealing head is in the shape of a circular truncated cone, and the slope angle of the sealing slope is the same as the outer ring inclination angle of the sealing head.

As a further proposal of the utility model, the quantity of the circulation grooves is the same as the quantity of the return passages, and a plurality of circulation grooves and a plurality of return passages are arranged in an annular and alternate way.

Compared with the prior art, the utility model discloses following beneficial effect has:

the utility model realizes one-way sealing by the characteristic of fluid flowing by arranging the movable seal matched with the slide rail, and simultaneously limits the movable seal by adopting the slide rail matched with the circulation groove to replace the spring limiting movable seal in the traditional mechanical sealing element, so that the probability of damage is lower compared with a spring, and the damage caused by overlarge fluid pressure is not easy to occur;

by arranging the dynamic seal matched backflow channel and the annular groove, after the dynamic seal matched sealing slope completes one-way sealing, fluid forms partial circulation in the second connecting pipe by means of the backflow channel and the annular groove, pressure applied to the dynamic seal is reduced, the dynamic seal is prevented from being under high pressure for a long time during fluid backflow, and the service life of the dynamic seal is prolonged.

Drawings

Fig. 1 is a schematic view of the overall structure of a mechanical sealing element of the present invention;

fig. 2 is an exploded view of the overall structure of a mechanical seal of the present invention;

fig. 3 is a cross-sectional view of the overall structure of a mechanical seal of the present invention;

fig. 4 is a schematic structural view of a dynamic seal in the mechanical seal element of the present invention.

In the figure: 1. a first connecting pipe; 2. a second connecting pipe; 3. butt-joint pipes; 4. a ring groove; 5. a return channel; 6. a slide rail; 7. a sealing groove; 8. static sealing; 9. dynamic sealing; 10. sealing the slope; 901. a sealing head; 902. the tail part is opened and closed; 903. a flow-through groove.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention is further described below with reference to the following embodiments.

As shown in fig. 1-4, a mechanical sealing element, including a first connecting pipe 1 and a second connecting pipe 2, the first connecting pipe 1 is located at the rear end of the second connecting pipe 2, the first connecting pipe 1 and the second connecting pipe 2 are located at the outer ring of the first connecting pipe 1 and the second connecting pipe 2, and a same butt joint pipe 3 is installed at the joint of the first connecting pipe 1 and the second connecting pipe 2, an annular groove 4 is opened at the inner ring of the second connecting pipe 2 near the front end, a plurality of backflow channels 5 are opened at the rear end of the annular groove 4 through the inner ring of the second connecting pipe 2, a plurality of sliding rails 6 are fixedly installed at the inner ring of the first connecting pipe 1 near the front end, sealing grooves 7 are opened at the front end of the first connecting pipe 1 and the rear end of the second connecting pipe 2, the same static seal 8 is provided inside of the two sealing grooves 7, a sealing slope 10 is provided at the inner ring of the first connecting pipe 1 and the rear end of the sliding rails 6, and a same dynamic seal 9 is provided at the inner ring of the first connecting pipe 1 and the positions of the sealing slope 10 and the sliding rails 6.

In this scheme, in order to realize one-way sealing, a dynamic seal 9 is provided, the dynamic seal 9 is composed of a sealing head 901, an opening and closing tail 902 and a plurality of circulation grooves 903, the opening and closing tail 902 is located at the front end of the sealing head 901 and is integrally arranged with the sealing head 901, and the plurality of circulation grooves 903 penetrate through the front end and the rear end of the opening and closing tail 902 and the rear end of the sealing head 901.

The outer ring of the first connecting pipe 1 is close to the front end, the outer ring of the second connecting pipe 2 is close to the rear end, threads are formed in the inner ring of the connecting pipe 3, the connecting pipe 3 is in threaded connection with the first connecting pipe 1 and the second connecting pipe 2, when the first connecting pipe 1 and the second connecting pipe 2 are installed and disassembled, the first connecting pipe 3 is held by one hand and is not moved, and the disassembly can be completed by rotating the first connecting pipe 1 or the second connecting pipe 2 by the other hand.

The number of the sliding rails 6 is half of the number of the circulation grooves 903, the dynamic seal 9 is matched with the sliding rails 6 through the circulation grooves 903 and is in sliding sleeve connection with the first connecting pipe 1, during one-way sealing, the dynamic seal 9 slides to the rear end of the first connecting pipe 1 along the direction of the sliding rails 6, and during one-way circulation, the dynamic seal 9 slides to the front end of the second connecting pipe 2 along the direction of the sliding rails 6.

The sealing head 901 is arranged in a circular truncated cone shape, the slope angle of the sealing slope 10 is the same as the slope angle of the outer ring of the sealing head 901, and when the movable seal 9 slides to the outer ring of the sealing head 901 along the direction of the sliding rail 6 and is attached to the slope of the sealing slope 10, one-way sealing is achieved.

The number of the circulation grooves 903 is the same as that of the return channels 5, the circulation grooves 903 and the return channels 5 are arranged in an annular alternating manner, and when the dynamic seal 9 slides to the tail end of the opening and closing tail portion 902 along the direction of the slide rail 6 and is attached to the inner ring of the second connecting pipe 2, fluid flows from the first connecting pipe 1 to the second connecting pipe 2 through the four circulation grooves 903 which are not in contact with the slide rail 6.

It should be noted that, the present invention is a mechanical sealing element, when in use, firstly, the mechanical sealing element is assembled, the static seal 8 is pushed into the seal groove 7 at the front end of the first connecting pipe 1, then the butt-joint pipe 3 is sleeved at the front end of the first connecting pipe 1 and rotates until the screw thread section of the first connecting pipe 1 is submerged into the position of the butt-joint pipe 3, then one end of the seal head 901 in the dynamic seal 9 is inserted into the front end of the first connecting pipe 1, so that the slide rail 6 is clamped into the four circulation grooves 903, then the dynamic seal 9 is pushed into the first connecting pipe 1, the rear end of the second connecting pipe 2 is inserted into the butt-joint pipe 3 and rotates until the second connecting pipe 2 cannot rotate, then the mechanical sealing element is installed in the device, the fluid flows from the first connecting pipe 1 to the second connecting pipe 2, therefore, the rear end of the first connecting pipe 1 and the front end of the second connecting pipe 2 are respectively connected with fluid pipelines at two ends of the fluid in the device;

after the mechanical sealing element is installed, when fluid flows into the first connecting pipe 1, the movable seal 9 is pushed open, the movable seal 9 slides towards the second connecting pipe 2 along the direction of the sliding rail 6, when the tail end of the opening-closing tail portion 902 is attached to the inner ring of the second connecting pipe 2, the fluid flows from the first connecting pipe 1 to the second connecting pipe 2 through the four circulation grooves 903 which are not in contact with the sliding rail 6, one-way circulation is achieved, when the fluid flows reversely, namely flows from the second connecting pipe 2 to the first connecting pipe 1, the fluid pushes open the seal 9 towards the rear end of the first connecting pipe 1, the movable seal 9 slides along the direction of the sliding rail 6 to the slope surface of the sealing head portion 901 and is attached to the slope surface of the sealing slope 10, one-way sealing is achieved, at the moment, the rear end of the second connecting pipe 2 is blocked by the movable seal 9, the second connecting pipe 2 has a certain length, therefore, the fluid pressure at the head end and the tail end of the second connecting pipe 2 is different, and part of the fluid flows from the rear end of the second connecting pipe 2 to the direction of the ring groove 4 through the return channel 5, local circulation is formed, and the pressure on the movable seal 9 is reduced.

The foregoing shows and describes the basic principles and principal features of the invention, together with the advantages thereof. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only illustrative of the principles of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the present invention, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A mechanical seal characterized by: including connecting pipe (1) and connecting pipe two (2), connecting pipe (1) is located the rear end of connecting pipe two (2), connecting pipe (1) and the outer lane of connecting pipe two (2) and the junction that is located connecting pipe (1) and connecting pipe two (2) install same butt joint pipe (3), the inner circle of connecting pipe two (2) leans on the front end to seted up annular (4), run through the inner circle body of connecting pipe two (2) and be located the rear of annular (4) and seted up a plurality of backward flow way (5), the inner circle of connecting pipe (1) leans on front end fixed mounting to have a plurality of slide rail (6), seal groove (7) have all been seted up to the front end body that runs through connecting pipe one (1) and the rear end body of connecting pipe two (2), the inside of two seal grooves (7) is provided with same static seal (8), the inner circle of connecting pipe one (1) and the rear end that is located slide rail (6) are provided with sealing slope (10), the inner circle of connecting pipe (1) and the position that is located sealing slope (10) and slide rail (6) is provided with same dynamic seal (9).

2. A mechanical seal according to claim 1, wherein: the dynamic seal (9) is composed of a seal head part (901), an opening-closing tail part (902) and a plurality of circulation grooves (903) together, the opening-closing tail part (902) is positioned at the front end of the seal head part (901) and is integrally arranged with the seal head part (901), and the plurality of circulation grooves (903) penetrate through the front end and the rear end of the opening-closing tail part (902) and the rear end of the seal head part (901).

3. A mechanical seal according to claim 1, wherein: the outer ring of the first connecting pipe (1) is close to the front end, the outer ring of the second connecting pipe (2) is close to the rear end, threads are formed on the inner ring of the connecting pipe (3), and the butt joint pipe (3) is in threaded connection with the first connecting pipe (1) and the second connecting pipe (2).

4. A mechanical seal according to claim 2, wherein: the number of the sliding rails (6) is half of that of the circulation grooves (903), and the dynamic seal (9) is matched with the sliding rails (6) through the circulation grooves (903) to be in sliding sleeve connection with the first connecting pipe (1).

5. A mechanical seal according to claim 2, wherein: the sealing head part (901) is arranged in a round table shape, and the slope angle of the sealing slope (10) is the same as the outer ring inclination angle of the sealing head part (901).

6. A mechanical seal according to claim 2, wherein: the number of the circulation grooves (903) is the same as that of the backflow channels (5), and the circulation grooves (903) and the backflow channels (5) are arranged in an annular alternating mode.