CN211344034U

CN211344034U - Mechanical sealing device of vapor compressor

Info

Publication number: CN211344034U
Application number: CN201921876391.8U
Authority: CN
Inventors: 陆大培; 谢志成; 冯鹏辉
Original assignee: Zhejiang Maiwojia Technology Co ltd
Current assignee: Zhejiang Maiwojia Technology Co ltd
Priority date: 2019-11-04
Filing date: 2019-11-04
Publication date: 2020-08-25
Anticipated expiration: 2029-11-04

Abstract

The utility model provides a vapor compressor mechanical seal device, including annular shaft sleeve and sealing base, sealing base is located annular shaft sleeve outside, annular shaft sleeve and sealing base comprise two upper and lower semi-rings, be provided with the seal groove in the sealing base, be provided with the carbocycle in the seal groove, install the spring between carbocycle and the seal groove, be provided with five seal grooves in the sealing base, install the carbocycle in every way seal groove respectively, be provided with a labyrinth seal ring before the first carbocycle, be provided with steam isolation between first carbocycle and the second carbocycle, one of them semi-ring of sealing base sets up steam filling port, another semi-ring sets up steam evacuation mouth, be provided with compressed air between third and the fourth carbocycle and keep apart, one of them semi-ring of sealing base sets up compressed air filling port, another semi. The utility model discloses a mechanical seal device can reduce wear to can clear up carbocycle base inlayer and corrode and dirty stifled material.

Description

Mechanical sealing device of vapor compressor

Technical Field

The utility model relates to a mechanical seal device especially relates to a mechanical seal device for MVC vapor compressor.

Background

The carbon ring sealing structure comprises a sealing base and an annular shaft sleeve, wherein sealing grooves with different numbers are arranged in the sealing base, an annular graphite sealing ring is arranged in each groove, a certain gap is formed between the inner diameter of the graphite sealing ring and the annular shaft sleeve, the outer surface of the shaft sleeve is coated with a wear-resistant layer, and the coating material is generally aluminum oxide or oxide. The principle of carbon ring sealing is to throttle stepwise to achieve sealing when high pressure fluid passes through the carbon ring.

When the steam-vapor compressor is applied to an MVR steam compressor, the purity of material steam is insufficient due to the possibility of material flying, if the material steam contains particulate matters, particularly the steam compressor of the MVR system in a salt production process, a carbon ring in a mechanical sealing device is very seriously abraded, and the carbon ring is quickly abraded to cause air leakage of the mechanical sealing device under the condition of no isolation gas. The mechanical sealing device is the first carbon ring which is damaged most quickly, the abrasion loss is the largest, and the corrosion and the fouling substances of the inner layer of the carbon ring base are the most.

Disclosure of Invention

The utility model provides a technical problem provide a reduce wear to can clear up the carboatomic ring base inlayer and corrode and dirty mechanical seal device who blocks up the material.

A mechanical sealing device of a vapor compressor comprises an annular shaft sleeve and a sealing base, wherein the sealing base is positioned outside the annular shaft sleeve, the annular shaft sleeve and the sealing base are composed of an upper half ring and a lower half ring, a sealing groove is arranged in the sealing base, a carbon ring is arranged in the sealing groove, a spring is arranged between the carbon ring and the sealing groove, five sealing grooves are arranged in the sealing base, each sealing groove is respectively provided with a carbon ring, the total number of the five carbon rings is five, a labyrinth sealing ring is arranged in front of the first carbon ring, a steam isolation is arranged between the first carbon ring and the second carbon ring, one half ring of the sealing base is provided with a steam filling port, the other half ring is provided with a steam evacuation port, a third carbon ring and a fourth carbon ring are isolated by compressed air, one of the semi-rings of the sealing base is provided with a compressed air filling opening, and the other semi-ring is provided with a compressed air emptying opening.

Preferably, the annular shaft sleeve is provided with a fixing hole position, and a fixing screw is installed at the fixing hole position.

Preferably, the spring is a inconel spring.

The utility model discloses the beneficial effect who has as follows:

1. the utility model discloses add labyrinth seal, reduce the sealed load of carbocycle, because the pressure ratio of compressor spiral case is higher, the corresponding pressure that is greater than the carbocycle outside the seal of pressure at the impeller back, and vapor leakage can be very obvious winter, add one labyrinth seal and be favorable to reducing the pressure of leaking steam and reduce in the steam chance that impurity got into the carbocycle and play step-down and guard action.

2. The utility model discloses set up steam and keep apart between first carbon ring and second way carbon ring, use external steam to realize pressure balance and cleaning action, thereby the pressure and the injection amount through controlling external steam can realize the pressure balance of first carbon ring both sides and reduce leakage amount, and the steam of passing through can play the isolation, can effectively prevent material steam to get into down sealed one way, reduce the sealed wearing and tearing of rear end, the steam evacuation mouth of design can take away the powder of carbon ring wearing and tearing and the pollutant that adheres to on the axle sleeve in the spiral case steam, realize cleaning action.

3. The utility model discloses set up compressed air and keep apart between third carbocycle and fourth carbocycle: 1) because the rear end of the mechanical seal is the shaft seal of the gear box, if steam leaks from the seal, the steam enters the gear box to cause the emulsification of lubricating oil, and the gear box is damaged; 1) compressor air can cool off the steam that leaks from the front, produces a small amount of comdenstions water after hot steam and microthermal compressed air contact, and the comdenstion water can play the cleaning action at the in-process of draining away, thereby makes the increase of rear end axle sleeve cleanliness reduce the wearing and tearing volume of carbocycle.

4. And because MVR vapor compressor is often used for corroding the medium, the spring of general fixed carbocycle is 17-4PH or 316 stainless steel carbocycle, the utility model discloses a higher chrome nickel iron alloy spring of anticorrosion grade, through the improvement of material strengthened the life of spring greatly, increased seal structure's life.

Drawings

Fig. 1 is a schematic structural diagram of a mechanical sealing device of a vapor compressor.

Detailed Description

As shown in fig. 1:

the utility model provides a vapor compressor mechanical seal device, includes annular shaft sleeve 1 and seal base 2, and seal base is located annular shaft sleeve outside, and annular shaft sleeve and seal base comprise two upper and lower semi-rings, are provided with seal groove 3 in the seal base, are provided with carbocycle 4 in the seal groove, installation spring 5 between carbocycle and the seal groove, and the spring adopts chromium nickel iron alloy spring.

Five sealing grooves are formed in the sealing base, carbon rings are respectively installed in each sealing groove, a labyrinth sealing ring 6 is arranged in front of the first carbon ring, steam is isolated between the first carbon ring and the second carbon ring, one of the semi-rings of the sealing base is provided with a steam filling port 7, the other semi-ring is provided with a steam emptying port 8, compressed air is isolated 9 between the third carbon ring and the fourth carbon ring, one of the semi-rings of the sealing base is provided with a compressed air filling port, and the other semi-ring is provided with a compressed air emptying port 10. The annular shaft sleeve is provided with a fixing hole position, and a fixing screw 11 is arranged at the fixing hole position.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention.

Claims

1. A mechanical sealing device of a vapor compressor comprises an annular shaft sleeve and a sealing base, wherein the sealing base is positioned outside the annular shaft sleeve, the annular shaft sleeve and the sealing base are composed of an upper half ring and a lower half ring, a sealing groove is arranged in the sealing base, a carbon ring is arranged in the sealing groove, a spring is arranged between the carbon ring and the sealing groove, it is characterized in that five sealing grooves are arranged in the sealing base, each sealing groove is respectively provided with a carbon ring, five carbon rings are provided in total, a labyrinth sealing ring is arranged in front of the first carbon ring, a steam isolation is arranged between the first carbon ring and the second carbon ring, one half ring of the sealing base is provided with a steam filling port, the other half ring is provided with a steam evacuation port, a third carbon ring and a fourth carbon ring are isolated by compressed air, one of the semi-rings of the sealing base is provided with a compressed air filling opening, and the other semi-ring is provided with a compressed air emptying opening.

2. The vapor compressor mechanical seal device of claim 1, wherein a fixing hole is provided on the annular shaft sleeve, and a fixing screw is installed at the fixing hole.

3. The vapor compressor mechanical seal of claim 1, wherein the spring is an inconel spring.