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CN-224214430-U - MVR centrifugal vapor compression machine combined sealing structure

CN224214430UCN 224214430 UCN224214430 UCN 224214430UCN-224214430-U

Abstract

The utility model discloses a combined sealing structure of an MVR centrifugal vapor pressure compressor, which comprises a rotating shaft, wherein a shaft sleeve is fixedly connected to the side surface of the rotating shaft, a mounting plate is rotatably connected to the side surface of the shaft sleeve, a sealing ring is fixedly connected to the side surface of the mounting plate, a positioning cylinder is connected to the side inner wall of the mounting plate in a threaded manner, a positioning thread is fixedly connected to the inner side surface of the positioning cylinder, an air inlet pipe is fixedly connected to the side surface of the mounting plate, an air channel is arranged in the mounting plate, a fixing ring is fixedly connected to the side inner wall of the mounting plate, a piston is slidably connected to the side inner wall of the fixing ring, and a compression ring is fixedly connected to one end of the piston, which is close to the fixing ring. Through above part, utilize the location screw thread on the location section of thick bamboo simultaneously and high pressure steam to get into the passageway of ventilating and promote piston and extrusion ring, extrude the axle sleeve from both sides for reduce the gap between axle sleeve and the pivot, thereby improve the sealed effect of axle sleeve inboard and pivot.

Inventors

  • HAN XIAOXI

Assignees

  • 天创压缩机技术(河南)有限公司

Dates

Publication Date
20260508
Application Date
20250715

Claims (8)

  1. 1. The combined sealing structure of the MVR centrifugal vapor compression machine is characterized by comprising a rotating shaft (4), wherein a shaft sleeve (10) is fixedly connected to the side surface of the rotating shaft (4), a mounting plate (1) is rotatably connected to the side surface of the shaft sleeve (10), a sealing ring (5) is fixedly connected to the side surface of the mounting plate (1), a positioning cylinder (11) is in threaded connection with the side inner wall of the mounting plate (1), and a positioning thread (13) is fixedly connected to the inner side surface of the positioning cylinder (11); The side surface fixedly connected with intake pipe (7) of mounting panel (1), the inside of mounting panel (1) is provided with ventilation channel (8), the side inner wall fixedly connected with solid fixed ring (15) of mounting panel (1), the side inner wall sliding connection of solid fixed ring (15) has piston (9), the one end fixedly connected with extrusion ring (16) that piston (9) is close to solid fixed ring (15).
  2. 2. The combined sealing structure of the MVR centrifugal vapor compression machine according to claim 1, wherein the inside of the mounting plate (1) is provided with a through groove (12), and the extrusion ring (16) and the fixing ring (15) are positioned in the through groove (12).
  3. 3. The combined sealing structure of the MVR centrifugal vapor compression machine according to claim 1, wherein the piston (9) is positioned in the ventilation channel (8) and is in sliding connection with the mounting plate (1), and one end of the piston (9) is attached to the shaft sleeve (10) according to the principle of the extrusion ring (16).
  4. 4. The combined sealing structure of the MVR centrifugal vapor compression machine according to claim 1, wherein the side surface of the shaft sleeve (10) is rotationally connected with the positioning cylinder (11), and the side surface of the shaft sleeve (10) is attached to the positioning screw thread (13).
  5. 5. The combined sealing structure of the MVR centrifugal vapor compression machine according to claim 1, wherein a connecting ring (14) is fixedly connected to the side surface of the shaft sleeve (10), and the side surface of the connecting ring (14) is rotatably connected with the sealing ring (5).
  6. 6. The combined sealing structure of the MVR centrifugal vapor compression machine according to claim 1, wherein a fixing part (3) is fixedly connected to the side surface of the mounting plate (1), and a screw (2) is connected to the side surface of the mounting plate (1) in a threaded manner.
  7. 7. The combined sealing structure of the MVR centrifugal vapor compression machine according to claim 6, wherein a sealing cavity (6) is arranged between the fixing part (3) and the mounting plate (1), and the sealing ring (5) is positioned in the sealing cavity (6).
  8. 8. The combined sealing structure of the MVR centrifugal vapor compression machine according to claim 1, wherein one end of the sealing ring (5) far away from the mounting plate (1) is attached to the fixing part (3), and the side surface of the rotating shaft (4) is rotationally connected with the sealing ring (5).

Description

MVR centrifugal vapor compression machine combined sealing structure Technical Field The utility model relates to the technical field of sealing structures, in particular to a combined sealing structure of an MVR centrifugal vapor compression machine. Background In the operation process of the MVR centrifugal steam compressor, the sealing performance between the rotating shaft and the shaft sleeve is a key factor affecting the efficiency and the stability of equipment. However, the sealing structure for the part in the prior art has a plurality of defects that the traditional sealing mode is difficult to effectively control the gap between the shaft sleeve and the rotating shaft, and the problem that the gap is overlarge easily occurs due to poor fitting degree of the shaft sleeve and the rotating shaft due to lack of design of extruding the shaft sleeve through the positioning screw thread, so that the sealing effect is not ideal. Meanwhile, the existing sealing structure mostly does not utilize high-pressure steam generated in the running process of equipment to enhance sealing performance, and lacks a mechanism for introducing the high-pressure steam through a ventilation channel and pushing a piston to drive an extrusion ring to dynamically extrude the shaft sleeve, so that a continuous and compact attaching state is difficult to form between the shaft sleeve and the rotating shaft. In addition, traditional seal design adopts single fixed or extrusion mode more, lacks the dual extrusion structure that forms with fixed section of thick bamboo cooperation, can't further promote sealed effect through multiple effect, under high pressure steam environment, causes steam leakage because of sealing performance is not enough easily, has not only reduced the work efficiency of compressor, still probably causes the energy waste and the hidden danger of equipment operation. Disclosure of utility model The utility model aims to at least solve one of the technical problems in the prior art, and provides a combined sealing structure of an MVR centrifugal vapor compression machine, which is characterized in that a group of positioning cylinders are arranged on a mounting plate, positioning threads on the inner side of the positioning cylinders are used for extruding a shaft sleeve, and gaps between the shaft sleeve and a rotating shaft are reduced, so that the sealing effect between the inner side of the shaft sleeve and the rotating shaft is improved, high-pressure vapor is introduced into a ventilation channel to push a piston so as to enable an extruding ring to extrude the shaft sleeve, the shaft sleeve is attached to the rotating shaft more tightly, and the sealing property between the rotating shaft and the shaft sleeve is further improved through the double extruding effect with a fixed cylinder. The utility model also provides a combined sealing structure of the MVR centrifugal vapor compression machine, which comprises a rotating shaft, wherein the side surface of the rotating shaft is fixedly connected with a shaft sleeve, the side surface of the shaft sleeve is rotationally connected with a mounting plate, the side surface of the mounting plate is fixedly connected with a sealing ring, the side inner wall of the mounting plate is in threaded connection with a positioning cylinder, and the inner side surface of the positioning cylinder is fixedly connected with positioning threads; The side surface fixedly connected with intake pipe of mounting panel, the inside of mounting panel is provided with the passageway of ventilating, the side inner wall fixedly connected with solid fixed ring of mounting panel, gu fixed ring's side inner wall sliding connection has the piston, the one end fixedly connected with extrusion ring that the piston is close to solid fixed ring. Through above part, utilize the location screw thread on the location section of thick bamboo simultaneously and high pressure steam to get into the passageway of ventilating and promote piston and extrusion ring, extrude the axle sleeve from both sides for reduce the gap between axle sleeve and the pivot, thereby improve the sealed effect of axle sleeve inboard and pivot. According to the MVR centrifugal vapor compression machine combined sealing structure, the through groove is formed in the mounting plate, and the extrusion ring and the fixing ring are located in the through groove. The extrusion ring can extrude the sleeve in the through groove. According to the combined sealing structure of the MVR centrifugal vapor compression machine, the piston is positioned in the ventilation channel and is in sliding connection with the mounting plate, and one end of the piston is attached to the shaft sleeve according to the principle of the extrusion ring. So that steam entering the vent passage can push the piston along the mounting plate. According to the MVR centrifugal vapor compression machine combined sealing structure, the side surface of the sha