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CN-121804108-B - Semi-closed screw refrigerator for concentrated refrigeration

CN121804108BCN 121804108 BCN121804108 BCN 121804108BCN-121804108-B

Abstract

The invention discloses a semi-closed screw type refrigerator for concentrated refrigeration, which belongs to the technical field of refrigerators and comprises an evaporator shell and a condenser shell, wherein the inner side wall of the evaporator shell is fixedly connected with a plurality of U-shaped sleeves through a plurality of groups of distributed support plates, the outer side walls of two adjacent U-shaped sleeves are connected with elastic baffle covers for adjusting the pressure of the upper space and the lower space in the evaporator shell through pressure regulating assemblies, and the evaporator shell is provided with a compression tube shell. According to the invention, through the arrangement of the flow measuring plate and the sliding component, the ageing condition of the oil product can be indirectly judged by using the obstruction effect of the capillary groove on the flow of the lubricating oil, the built-in passive monitoring is realized, the judgment basis is provided for the replacement of the lubricating oil, the device is superior to the traditional regular replacement or external oil sample analysis, the real-time performance and the economical performance are better, meanwhile, the circuit alarm is triggered by the friction resistance change of the sliding block, the abnormal working conditions such as rotor abrasion, lubricating oil emulsification or foreign matter invasion can be discovered early, and the operation safety is greatly improved.

Inventors

  • LIU FENMING
  • LIU QIMENG

Assignees

  • 南京天源冷冻设备有限公司

Dates

Publication Date
20260508
Application Date
20260306

Claims (9)

  1. 1. The semi-closed screw refrigerator for concentrated refrigeration comprises an evaporator shell (1) and a condenser shell (2), and is characterized in that the inner side walls of the evaporator shell (1) are fixedly connected with U-shaped sleeves (7) through a plurality of groups of distribution supporting plates (6), the outer side walls of adjacent U-shaped sleeves (7) are connected with elastic baffle covers (10) for adjusting the pressure of the upper space and the lower space in the evaporator shell (1) through pressure adjusting assemblies, a compression tube shell (11) is arranged on the evaporator shell (1), and a double-screw compression assembly for pressurizing gaseous refrigerant generated in the evaporator shell (1) is arranged in the compression tube shell (11); Be provided with slide valve (16) on the twin-screw compression subassembly, slide valve (16) bottom is connected with heat dissipation fin (17), heat dissipation fin (17) bottom has flow measurement board (18) through dead lever sliding connection, set up the capillary groove that is used for monitoring lubricating oil mobility on the twin-screw compression subassembly in flow measurement board (18), heat dissipation fin (17) bottom is provided with the slip subassembly that is used for monitoring twin-screw compression subassembly surface smoothness degree, compression tube shell (11) end fixing has retainer tube (23), be provided with seal assembly subassembly in retainer tube (23), seal assembly subassembly outside is provided with compressor end cover (28).
  2. 2. The semi-closed screw refrigerator for concentrated refrigeration according to claim 1, wherein the two ends of the evaporator shell (1) and the two ends of the condenser shell (2) are respectively fixed with a frame (3), a control cabinet (4) is fixedly arranged on the evaporator shell (1), and a duplex pipe joint (5) communicated with the end part of the U-shaped sleeve (7) is fixedly arranged at the end part of the evaporator shell (1).
  3. 3. The semi-closed screw refrigerator for concentrated refrigeration according to claim 1, wherein the pressure regulating assembly comprises double-hole sleeves (8) fixed on two adjacent U-shaped sleeves (7), the double-hole sleeves (8) are fixedly connected with an elastic baffle cover (10) through two hydraulic push rods (9), a plurality of communication holes are formed in the elastic baffle cover (10), and the double-hole sleeves (8) are arranged in three groups in parallel.
  4. 4. A semi-closed screw refrigerator for concentrated refrigeration according to claim 1, wherein the twin screw compression assembly comprises a fluorine-resistant motor (12) fixed in a compression shell (11), the output end of the fluorine-resistant motor (12) is connected with a male rotor (13) and a female rotor (14) through a transmission case, and the male rotor (13) and the female rotor (14) are meshed with each other.
  5. 5. The semi-closed screw refrigerator for concentrated refrigeration according to claim 1, wherein the slide valve (16) is arranged on the meshing area of the male rotor (13) and the female rotor (14), the slide valve (16) is connected in the retention tube (23) through the loading oil valve (15), and a plurality of groups of spacing grooves are formed in the bottom of the heat dissipation fin plate (17).
  6. 6. The semi-closed screw refrigerator for concentrated refrigeration according to claim 1, wherein the sliding ends of the flow measuring plate (18) and the fixed rod are made of magnetic materials, a buffer magnetic ring (19) is fixedly connected to the outer side wall of the fixed rod, and a capillary type oil sensor for monitoring the flow of lubricating oil is arranged at the tail end of a capillary groove of the flow measuring plate (18).
  7. 7. The semi-closed screw refrigerator for concentrated refrigeration according to claim 1, wherein the sliding assembly comprises a sliding block (20) sliding at the bottom of the heat dissipation fin plate (17), two ends of the sliding block (20) are respectively connected with two fixed plates in a sliding manner through two sliding rods, movable electrodes (21) are fixed at two ends of the sliding block (20), fixed electrodes (22) are fixed on the inner sides of the fixed plates, and a signal feedback instrument electrically connected with the movable electrodes (21) is arranged in the sliding block (20).
  8. 8. The semi-closed screw refrigerator for concentrated refrigeration according to claim 1, wherein the seal assembly comprises an exhaust pressure plate (24) slidably arranged in a retention tube (23), a centering shaft (25) is fixed at the end of the exhaust pressure plate (24), an external thread is formed on the outer side wall of the end of the retention tube (23), and an internal thread for threaded connection with the retention tube (23) is formed on the inner side wall of a compressor end cover (28).
  9. 9. The semi-closed screw refrigerator for concentrated refrigeration according to claim 8, wherein the outer side wall of the retention tube (23) is fixed with a locking flange (26), a plurality of locking bolts are connected to the locking flange (26) in a threaded manner, a plurality of locking grooves corresponding to the locking bolts are formed in the outer side wall of the exhaust pressing plate (24), a rubber pad (27) is arranged on the inner end surface of the compressor end cover (28), and centering holes matched with the centering shaft (25) are formed in the rubber pad (27) and the compressor end cover (28).

Description

Semi-closed screw refrigerator for concentrated refrigeration Technical Field The invention relates to the technical field of refrigerators, in particular to a semi-closed screw refrigerator for concentrated refrigeration. Background The semi-closed screw refrigerating unit is one kind of refrigerating system with screw compressor, motor, oil separator and necessary control elements integrated inside one detachable casing. The lubricating oil in the screw compressor part of the refrigerator can fill the gap between the rotor and the shell, form an oil film protection bearing and a meshing surface and absorb compression heat, and healthy lubricating oil is critical to the safe and stable operation of equipment, while the current method mainly relies on periodic sampling for laboratory analysis, is offline and periodic, cannot reflect the instant deterioration of the oil in operation (such as abrupt water inflow emulsification and high-temperature deterioration) in real time, meanwhile, abnormal conditions such as abrasion and scratch of the male and female rotors are extremely difficult to discover in the early stage, and can be generally detected only when serious vibration, noise or performance is greatly reduced, irreversible damage can be caused at the moment, follow-up maintenance is planned or post-remediation, certain hysteresis is provided, early warning of faults cannot be realized, the risk of unexpected shutdown and the cost of major maintenance are increased, and based on the semi-closed screw type refrigerator for concentrated refrigeration. Disclosure of Invention The invention aims to solve the problems in the prior art and provides a semi-closed screw refrigerator for concentrated refrigeration. In order to achieve the above purpose, the present invention adopts the following technical scheme: The semi-closed screw refrigerator for concentrated refrigeration comprises an evaporator shell and a condenser shell, wherein the inner side wall of the evaporator shell is fixedly connected with U-shaped sleeves through a plurality of groups of distribution supporting plates, the outer side wall of each adjacent U-shaped sleeve is connected with an elastic baffle cover for adjusting the pressure of the upper space and the lower space in the evaporator shell through a pressure adjusting assembly, a compression tube shell is arranged on the evaporator shell, and a double-screw compression assembly for pressurizing gaseous refrigerant generated in the evaporator shell is arranged in the compression tube shell; Be provided with the slide valve on the twin-screw compression subassembly, the slide valve bottom is connected with the heat dissipation fin, heat dissipation fin bottom has the flow measurement board through dead lever sliding connection, set up the capillary groove that is used for monitoring lubricating oil mobility on the twin-screw compression subassembly in the flow measurement board, heat dissipation fin bottom is provided with the slip subassembly that is used for monitoring twin-screw compression subassembly surface smoothness degree, compression tube shell end fixing has the retainer pipe, be provided with seal assembly subassembly in the retainer pipe, seal assembly subassembly outside is provided with the compressor end cover. Preferably, the racks are fixed at both ends of the evaporator shell and the condenser shell, a control cabinet is fixedly installed on the evaporator shell, and a duplex pipe joint communicated with the end of the U-shaped sleeve is fixedly installed at the end of the evaporator shell. Preferably, the pressure regulating assembly comprises double-hole sleeves fixed on two adjacent U-shaped sleeves, the double-hole sleeves are fixedly connected with the elastic baffle cover through two hydraulic push rods, a plurality of communication holes are formed in the elastic baffle cover, and the double-hole sleeves are arranged in three groups in parallel. Preferably, the double-screw compression assembly comprises a fluorine-resistant motor fixed in a compression tube shell, wherein the output end of the fluorine-resistant motor is in transmission connection with a male rotor and a female rotor through a transmission case, and the male rotor and the female rotor are meshed with each other. Preferably, the sliding valve is arranged on the meshing area of the male rotor and the female rotor, the sliding valve is connected in the retention tube through a loading oil valve, and a plurality of groups of spacing grooves are formed in the bottom of the heat dissipation fin plate. Preferably, the sliding ends of the flow measuring plate and the fixing rod are made of magnetic materials, a buffer magnetic ring is fixedly connected to the outer side wall of the fixing rod, and a capillary type oil sensor for monitoring the flow of lubricating oil is arranged at the tail end of a capillary groove of the flow measuring plate. Preferably, the sliding assembly comprises a sliding blo