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CN-224214699-U - Mechanical seal of double-screw expander

CN224214699UCN 224214699 UCN224214699 UCN 224214699UCN-224214699-U

Abstract

The utility model discloses a mechanical seal of a double-screw expander, which comprises a static ring, a movable ring, a sealing component and a limiting component, wherein the sealing component is arranged on the outer surface of the static ring, the sealing component comprises a static ring shell, a movable ring shell, a knob, a first bevel gear, a second bevel gear, a supporting ring, a threaded column, a movable ring, a sealing spring, a sealing push plate, a limiting ring, a sealing gasket and a surface texture ring, and the static ring shell is rotatably arranged on the outer surface of the static ring. According to the utility model, the elastic force of the sealing spring can be conveniently adjusted by a worker according to actual needs through the arranged sealing assembly, so that the contact surfaces of the two surface texture rings are in a proper force range, the service life of the mechanical seal is prolonged, and the sealing effect of the mechanical seal is improved. Through the spacing subassembly that sets up can be convenient for the staff install or dismantle quiet ring and rotating ring to the staff of being convenient for carries out daily inspection maintenance to mechanical seal, thereby has increased mechanical seal's availability factor.

Inventors

  • LING YUNZHI
  • HU XIAOPENG

Assignees

  • 衢州迅翔新能源汽车有限公司

Dates

Publication Date
20260508
Application Date
20250618

Claims (6)

  1. 1. The utility model provides a mechanical seal of twin-screw expander, includes quiet ring (1), rotating ring (2), seal assembly (3) and spacing subassembly (4), its characterized in that, seal assembly (3) set up quiet ring (1) surface, seal assembly (3) are including quiet ring shell (5), rotating ring shell (6), knob (7), first bevel gear (8), second bevel gear (9), support ring (10), screw thread post (11), removal ring (12), sealing spring (13), sealing push pedal (14), spacing ring (15), sealing gasket (16) and surface texture ring (17), quiet ring shell (5) rotate and install quiet ring (1) surface, rotating ring shell (6) set up rotating ring (2) surface, first recess (18) have been seted up to rotating ring shell (6) one side, second recess (19) have been seted up to quiet ring shell (5) one side.
  2. 2. The mechanical seal of a twin-screw expander as defined in claim 1, wherein a circular groove (20) is formed in the outer surface of the stationary ring casing (5), the first bevel gear (8) is rotatably mounted in the circular groove (20), the knob (7) is fixedly mounted at the top of the first bevel gear (8), the support ring (10) is fixedly mounted in the second groove (19), the second bevel gear (9) is rotatably mounted at one side of the support ring (10), the threaded post (11) is rotatably mounted at one side of the support ring (10), and the second bevel gear (9) is connected with the support ring (10).
  3. 3. The mechanical seal of a twin-screw expander according to claim 1, wherein the moving ring (12) is slidably mounted in the second groove (19), the moving ring (12) is in threaded connection with the threaded column (11), the seal push plate (14) is slidably mounted in the second groove (19), the seal spring (13) is fixedly mounted between the moving ring (12) and the seal push plate (14), a limit groove (21) is formed in the second groove (19), the limit ring (15) is slidably mounted in the limit groove (21), the limit ring (15) is fixedly connected with the seal push plate (14), the first groove (18) is rotatably mounted with a seal plate (22) and the seal plate (22) is fixedly connected with the moving ring (2), the seal gasket (16) is fixedly mounted on one side of the limit ring (15), the other seal gasket (16) is fixedly mounted on one side of the seal plate (22), the surface texture ring (17) is fixedly mounted on one side of the seal plate (16), and the seal ring (16) is fixedly mounted on one side of the seal ring (31) and the threaded column (31) is provided with a threaded sleeve.
  4. 4. A mechanical seal of a twin screw expander as defined in claim 1, wherein the limit assembly (4) comprises a snap ring (23), a limit spring (24), a guide plate (25) and a clamping plate (26), the snap ring (23) being fixedly mounted on the outer surface of the moving ring housing (6).
  5. 5. The mechanical seal of a twin-screw expander as defined in claim 4, wherein an annular groove (27) is formed in the outer surface of the snap ring (23), the guide plate (25) is slidably mounted in the annular groove (27), and the limit spring (24) is fixedly mounted between the snap ring (23) and the guide plate (25).
  6. 6. The mechanical seal of a twin-screw expander as defined in claim 4, wherein a square groove (30) is formed in the inner surface of the snap ring (23), the snap plate (26) is slidably mounted in the square groove (30), a guide groove (28) is formed in one side of the guide plate (25), and a clamping groove (29) is formed in the outer surface of the stationary ring casing (5).

Description

Mechanical seal of double-screw expander Technical Field The utility model relates to the technical field of double-screw expanders, in particular to a mechanical seal of a double-screw expander. Background The double-screw expander is a positive displacement expander, and is mainly composed of a pair of intermeshing screw rotors and a casing, the rotors and the casing are sealed by gaps to form a working cavity with continuously variable volume, and a gaseous working medium containing heat enters the working cavity for adiabatic expansion to drive the rotors to rotate for doing work, and the pressure and the temperature of the working medium are reduced while the expansion is done, so that the thermal power conversion is realized. The air inlet of the screw expander can be saturated steam or even steam with liquid, the variable working condition range of the screw expander is wide, and even the screw expander still has high efficiency under lower load, and the screw expander has been widely applied to the fields of waste heat power generation, industrial residual pressure power generation, geothermal power generation, bioenergy power generation and the like in the steel industry. The patent application with the application number of CN201020575524.0 comprises a seal box, a movable ring assembly and a static ring assembly, wherein the two sides of the movable ring assembly are respectively provided with the static ring assembly, the movable ring assembly and the static ring assembly are both arranged in the seal box, a spring seat is arranged at the contact position of the seal box and the static ring assembly, and a spring is arranged in the spring seat. The double-end mechanical seal can achieve a good sealing effect of zero leakage of a working medium while ensuring the running performance, is low in cost and suitable for popularization and application, can adapt to larger pressure fluctuation and bear larger axial movement torque by virtue of elasticity of springs through arranging the springs on the process medium side and the bearing side, can adapt to high pressure and a certain amount of axial movement, can avoid the phenomenon that the conventional mechanical seal is damaged easily due to dry friction when a high-speed screw expander is started and stopped by arranging a cooling system, and is a sealing box body formed by combining a sealing box cover and an outer gland, and is simple and convenient to install. However, when the mechanical seal structure is used, the elastic force of the spring cannot be adjusted, so that the friction force of the static ring assembly and the moving ring assembly cannot be adjusted, if the friction force of the static ring assembly and the moving ring assembly is large, the torque between the static ring assembly and the moving ring assembly is large, the contact surface between the static ring assembly and the moving ring assembly is damaged, the service life of the static ring assembly and the moving ring assembly is shortened, if the friction force of the static ring assembly and the moving ring assembly is small, the tightness between the static ring assembly and the moving ring assembly is reduced, the sealing effect of the mechanical seal structure is reduced, and the mechanical seal of the double-screw expander is required to be designed to solve the problems. Disclosure of utility model The utility model aims to provide a mechanical seal of a double-screw expander, which solves the defects in the prior art. In order to achieve the above object, the present utility model provides the following technical solutions: Including quiet ring, rotating ring, seal assembly and spacing subassembly, seal assembly sets up quiet ring surface, seal assembly includes quiet ring shell, rotating ring shell, knob, first bevel gear, second bevel gear, holding ring, screw thread post, removal ring, sealing spring, sealing push pedal, spacing ring, sealing washer and surface texture ring, quiet ring shell rotates and installs quiet ring surface, the rotating ring shell sets up the rotating ring surface, first recess has been seted up to rotating ring shell one side, second recess has been seted up to quiet ring shell one side. The sealing assembly can be convenient for a worker to adjust the elastic force of the sealing spring according to actual needs, so that the contact surfaces of the two surface texture rings are in a proper force range, the service life of the mechanical seal is prolonged, and the sealing effect of the mechanical seal is improved. Through the spacing subassembly that sets up can be convenient for the staff install or dismantle quiet ring and rotating ring to the staff of being convenient for carries out daily inspection maintenance to mechanical seal, thereby has increased mechanical seal's availability factor. The liquid film can be formed when the movable ring rotates through the arranged surface texture ring, so that the sealing effect of the mechanical