CN211975487U

CN211975487U - Novel self-cleaning dry gas sealing combined system for pump

Info

Publication number: CN211975487U
Application number: CN201921556158.1U
Authority: CN
Inventors: 张飞林
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-09-18
Filing date: 2019-09-18
Publication date: 2020-11-20
Anticipated expiration: 2029-09-18

Abstract

The utility model relates to a novel pump is with sealed combined system of automatically cleaning dry gas in sealed field of axle head. The shaft sleeve is arranged on the shaft, and the dry gas sealing static ring and the dry gas sealing dynamic ring form a sealing assembly which is connected with the shaft sleeve; the dry gas sealing static ring is connected with the gland through a spring and fixed through a cylindrical pin, the clamping ring is installed annularly by taking the dry gas sealing static ring as a center and is matched with the gland to be positioned, the nut is connected with the dry gas sealing movable ring and the shaft sleeve and is used for positioning the movable ring, the carbon ring is installed on the shaft sleeve and is fixed through a bolt, the driving ring is fixed with the shaft sleeve through an inner hexagonal concave end fastening screw, the driving ring is installed on the shaft, the positioning block is installed on the driving ring and is connected with the gland through a hexagonal head bolt, and the pump body is connected with the gland to complete integral. During sealing, the front end carbon ring seals and blocks impurities, and gas enters the sealing assembly and is not influenced by the impurities. The utility model has the advantages of the combination formula is sealed, but impurity in the sealed separation medium of front end carbocycle guarantees that dry gas seals safety and high efficiency.

Description

Novel self-cleaning dry gas sealing combined system for pump

Technical Field

The invention relates to the field of shaft end sealing of mechanical devices, in particular to a novel self-cleaning dry gas sealing combined system for a pump.

Background

With the improvement of the national requirement on environmental protection, the environmental protection treatment of various industries per se is also raised to a high level, and in recent years, the serious environmental protection accidents such as explosion, fire, environmental pollution and the like are mostly caused by the problem of 'leakage', so the leakage control of equipment is an urgent solution difficulty at present. In order to solve the problem of sealing leakage, a non-contact shaft end seal, namely a dry gas seal, capable of realizing low leakage and even zero leakage is designed. Because the non-contact sealing mode of air film isolation is used, the sealing element has no contact and no friction, and has long service life and extremely strong operation stability. The dry gas seal has excellent sealing performance and service stability, and is a shaft end sealing mode which is favored in recent years.

Because the dry gas sealing is a gas film sealing mode, the requirement on the purity of injected gas is extremely high. If impurities such as: large-particle media such as dust damage the sealing element in the high-speed operation process of the sealing assembly, affect the sealing efficiency, reduce the service life of the sealing assembly, even cause serious sealing leakage accidents, and cause economic loss and serious safety accidents.

SUMMERY OF THE UTILITY MODEL

To the above problem, the utility model provides a modular, but novel pump of automatically cleaning is with sealed integrated system of automatically cleaning dry gas.

The utility model adopts the technical proposal that:

a novel self-cleaning dry gas sealing combined system for a pump comprises a nut A1, a pump body 2, an O-shaped ring A3, a carbon ring 4, a gland A5, a spring A6, a dry gas sealing static ring A7, a shaft sleeve 8, a gas channel 9, a dry gas sealing dynamic ring 10, a bolt 11, a dry gas sealing static ring B12, a spring B13, a gland B14, an inner hexagonal concave end set screw 15, a driving ring 16, an O-shaped ring B17, a push ring 18, an O-shaped ring C19, a clamping ring 20, a nut 21, a cylindrical pin 22, a positioning block 23, a hexagonal head bolt 24, an inner hexagonal head screw 25 and a shaft 26.

It is characterized in that: the shaft sleeve 8 is mounted on the shaft 26; the dry gas sealing component consists of a dry gas sealing static ring A (7), a dry gas sealing dynamic ring (10) and a dry gas sealing static ring B (12); the dry gas sealing component is in threaded connection with the shaft sleeve (8); the dry gas sealing static ring A7 is fixedly connected with the gland A5 by a spring A6; the dry gas sealing static ring B12 is fixedly connected with the gland B14 by a spring B13; the dry gas sealing static ring B12 is fixed by the cylindrical pin 22 to prevent rotation, and the dry gas sealing static ring A7 has the same function; the clamping ring 20 is annularly installed by taking the dry gas sealing static ring A7 as a center, and is installed in a matching way with the gland A5 for positioning and axial stopping; the nut 21 is connected with the dry gas sealing dynamic ring 10 and the shaft sleeve 8, and is used for positioning and fixing the dry gas sealing dynamic ring 10; the carbon ring 4 is arranged on the shaft sleeve 8 and connected with the shaft sleeve through a bolt; the driving ring 16 is fixedly connected with the shaft sleeve 8 by using a hexagon socket head cap end set screw 15; the socket head cap screw 25 is integrally mounted on the shaft 26 in connection with the drive ring 16; the positioning block 23 is arranged on the driving ring 16 and fixedly connected with the gland B14 by using a hexagon head bolt 24; the pump body 2 is integrally connected with the gland A5 and the gland B14 by using bolts 11 to complete the overall assembly.

Compared with the prior art, the utility model has the advantages that: (1) combined sealing device, more efficient and safe (2) front end carbon ring seal can separate impurities in medium, and ensure safety of dry gas seal

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

In the figure: 1. the pneumatic sealing device comprises a nut A, a pump body, a gland A, a spring A, a dry gas sealing static ring A, a shaft sleeve 8, a gas channel 9, a dry gas sealing movable ring 10, a bolt 11, a dry gas sealing static ring B12, a spring B, a gland B14, a gland B15, an inner hexagonal concave end fastening screw 16, a driving ring 17, an O-shaped ring B, an O-shaped ring 18, a push ring 19, an O-shaped ring C20, a clamping ring 21, a nut 21, a cylindrical pin 22, a positioning block 23, a hexagonal head bolt 24, an inner hexagonal head screw 25 and a shaft 26.

Detailed Description

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

as shown in fig. 1, a novel self-cleaning dry gas sealing combination system for a pump is composed of a nut a1, a pump body 2, an O-ring A3, a carbon ring 4, a gland a5, a spring a6, a dry gas sealing static ring a7, a shaft sleeve 8, a gas channel 9, a dry gas sealing dynamic ring 10, a bolt 11, a dry gas sealing static ring B12, a spring B13, a gland B14, an inner hexagonal concave end set screw 15, a driving ring 16, an O-ring B17, a push ring 18, an O-ring C19, a collar 20, a nut 21, a cylindrical pin 22, a positioning block 23, a hexagonal head bolt 24, an inner hexagonal head screw 25 and a shaft 26. It is characterized in that: the shaft sleeve 8 is arranged on the shaft 26, and a dry gas sealing assembly consisting of a dry gas sealing static ring A7, a dry gas sealing dynamic ring 10 and a dry gas sealing static ring B12 is connected with the shaft sleeve 8; the dry gas sealing static ring A7 is fixedly connected with a gland A5 by a spring A6, the dry gas sealing static ring B12 is fixedly connected with a gland B14 by a spring B13, the dry gas sealing static ring B12 is fixed by a cylindrical pin 22 to prevent rotation, and the dry gas sealing static ring A7 is similar to the dry gas sealing static ring A7; the rand 20 uses the quiet ring A7 of dry gas seal to carry out the hoop installation as the center to with gland A5 cooperation installation fix a position and the axial prevents changeing, nut 21 connects dry gas seal rotating ring 10 and axle sleeve 8, fix a position and fixed dry gas seal rotating ring 10, the carbocycle 4 is installed on axle sleeve 8 and is connected with the bolt, the drive ring 16 utilizes the recessed end holding screw 15 of hexagon socket to carry out fixed connection with axle sleeve 8, the socket head cap screw 25 connects the drive ring 16 and becomes whole and installs on axle 26, the locating piece 23 is installed on the drive ring 16 and utilizes hexagon head bolt 24 and gland B14 to carry out fixed connection, pump body 2 and gland A5, gland B14 uses bolt 11 to carry out whole connection and accomplishes the overall assembly.

The utility model discloses a theory of operation is:

(1) carbon ring assembly sealing process

When the pump operates, a medium enters a cavity formed by the carbon ring 4 and the pump body 2 and a connecting gap between the shaft sleeve 8 and the shaft 26 through a gap in the pump body 2 and continuously moves to a low-pressure position, but medium blocking impurities cannot enter a dry gas sealing assembly due to the blocking of the carbon ring 4 body, and the O-shaped ring A3 completes medium blocking and initial sealing due to compression filling of the gap in operation.

(2) Dry gas sealing process

The dry gas sealing working process mainly comprises three parts: unstable state opening process, dynamic balance sealing process and sealing stopping process

Before the sealing opening process, the dry gas sealing static ring A7 and the dry gas sealing static ring B12 are kept attached to the dry gas sealing dynamic ring 10 under the action of the axial force and the medium static pressure of the spring A6 and the spring B13; when the seal is opened, seal gas is contacted with the seal ring through the gas channel 9, the dry gas seal movable ring 10 moves under the drive of the shaft 26 and generates a pumping action, kinetic energy is converted into pressure, and when the pressure is continuously increased to be larger than the axial force of the spring A6 and the spring B13, the dry gas seal static ring A7 and the dry gas seal static ring B12 are separated from the dry gas seal movable ring 10, a gas film is generated in a separation gap, and leakage is blocked and non-contact seal is formed; when the gas pressure is equal to the axial force, the seal is in a dynamic balance state; when sealing stops, the rotating speed of the dry gas sealing movable ring 10 is reduced, the pumping action is reduced, the gas pressure is continuously reduced, the axial force action is continuously increased until the gas film disappears, and the dry gas sealing assembly stops working.

Because the front end sealing process of carbocycle 4 for impurity in the medium is difficult to get into in the dry gas seal subassembly, provides good sealed environment for it, has guaranteed sealed high efficiency and has prolonged sealed life.

Claims

1. A novel self-cleaning dry gas sealing combined system for a pump is composed of a nut A (1), a pump body (2), an O-shaped ring A (3), a carbon ring (4), a gland A (5), a spring A (6), a dry gas sealing static ring A (7), a shaft sleeve (8), a gas channel (9), a dry gas sealing movable ring (10), a bolt (11), a dry gas sealing static ring B (12), a spring B (13), a gland B (14), an inner hexagonal concave end set screw (15), a driving ring (16), an O-shaped ring B (17), a push ring (18), an O-shaped ring C (19), a clamping ring (20), a nut (21), a cylindrical pin (22), a positioning block (23), a hexagon head bolt (24), an inner hexagonal head screw (25) and a shaft (26);

it is characterized in that: the shaft sleeve (8) is arranged on the shaft (26), and a dry gas sealing assembly consisting of a dry gas sealing static ring A (7), a dry gas sealing dynamic ring (10) and a dry gas sealing static ring B (12) is connected with the shaft sleeve (8); the dry gas sealing static ring A (7) is fixedly connected with the gland A (5) by a spring A (6), and the dry gas sealing static ring B (12) is fixedly connected with the gland B (14) by a spring B (13); the clamping ring (20) is installed annularly by taking the dry gas sealing static ring A (7) as a center and is installed in a matching way with the gland A (5) for positioning and axial rotation prevention, and the nut (21) is connected with the dry gas sealing dynamic ring (10) and the shaft sleeve (8) for positioning and fixing the dry gas sealing dynamic ring (10);

the carbon ring (4) is arranged on the shaft sleeve (8) and connected with the shaft sleeve by a bolt, and the driving ring (16) is fixedly connected with the shaft sleeve (8) by an inner hexagonal concave end set screw (15);

the inner hexagonal socket head cap screw (25) is connected with the driving ring (16) to be integrally arranged on the shaft (26), the positioning block (23) is arranged on the driving ring (16) and is fixedly connected with the gland B (14) by utilizing the hexagonal socket head cap screw (24);

the pump body (2), the gland A (5) and the gland B (14) are integrally connected by using bolts (11) to complete the overall assembly.