CN218972935U - Auxiliary oil return device for oil balance of double-full-closed screw compressor - Google Patents
Auxiliary oil return device for oil balance of double-full-closed screw compressor Download PDFInfo
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- CN218972935U CN218972935U CN202223591041.1U CN202223591041U CN218972935U CN 218972935 U CN218972935 U CN 218972935U CN 202223591041 U CN202223591041 U CN 202223591041U CN 218972935 U CN218972935 U CN 218972935U
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Abstract
The utility model discloses an engine oil balance auxiliary oil return device for a double-full-closed screw compressor, and belongs to the field of heating ventilation and refrigeration. The oil return device comprises an auxiliary oil return pipeline for auxiliary oil return and oil balance adjustment, wherein the auxiliary oil return pipeline is connected with an oil outlet of a first totally-enclosed screw compressor and an oil outlet of a second totally-enclosed screw compressor; a plurality of observation windows are arranged on the auxiliary oil return pipeline; and the auxiliary oil return pipeline is provided with a plurality of oil discharge valves. The auxiliary oil return pipeline can assist oil return and adjust oil balance, oil balance operation is carried out on the oil level of the compressor, and low oil level fault release rate of the compressor can be prevented. When faults occur, the treatment is carried out without filling refrigerating machine oil and refrigerant additionally, so that the cost of consumables and manpower is saved, and the fault treatment time is effectively shortened.
Description
Technical Field
The utility model belongs to the field of heating ventilation and refrigeration, and relates to an engine oil balance auxiliary oil return device for a double-full-closed screw compressor.
Background
The following is the operation working principle of the vertical totally-enclosed screw water-cooling chiller:
first, the compression process: after the refrigerant steam in the evaporator is sucked by the screw compressor, the motor applies energy to the refrigerant steam through the compressor rotor, so that the pressure of the refrigerant steam is increased and enters the condenser; at the same time, the temperature of the refrigerant vapor increases at the end of compression. The second step is that the condensation process: the high-pressure and high-temperature refrigerant vapor from the compressor is condensed into a liquid at a saturation pressure (condensing pressure corresponding to the condensing temperature) while giving off heat by the cooling water in the pipe in the condenser. At this time, the cooling water has a temperature increased by taking heat from the refrigerant vapor. The temperature of the cooling water is directly related to the condensing temperature (condensing pressure). Third, a throttling process: when the high-temperature and high-pressure refrigerant liquid from the bottom of the condenser flows through the throttling device, decompression expansion occurs, the pressure and the temperature are reduced, and the low-pressure and low-temperature liquid is changed into low-pressure and low-temperature liquid to enter the evaporator. Finally, the fourth step, the evaporation process: the low-pressure low-temperature refrigerant liquid absorbs heat from the secondary refrigerant (such as cold water) in the evaporator and evaporates into gas, and simultaneously the temperature of the secondary refrigerant is reduced, so that artificial refrigeration is realized, the refrigerant vapor in the evaporator is sucked by the compressor to be compressed, and the compression, condensation, throttling and evaporation processes are repeated. The purpose of continuous refrigeration is achieved by repeating the steps.
Inside the compressor of the vertical totally-enclosed screw water-cooling chiller, the refrigerating oil is used for lubricating and cooling the bearing and the rotor respectively by depending on the high-low pressure difference of the system and then through an internally arranged oil way. In the continuous exhaust process of the compressor, the refrigerant oil can be discharged out of the compressor along with the refrigerant gas, and if the discharged refrigerant oil cannot return to the compressor again, the compressor is in oil loss, the alarm is stopped and cannot be operated, and the compressor can be damaged in severe cases. In the prior art, an oil return system is mainly divided into two parts:
1. oil return: an efficient oil separator is installed between the compressor discharge and the condenser, and most of the refrigerant oil discharged along with the refrigerant gas is intercepted by the oil separator and directly returned to the compressor through the suction port.
2. High-pressure injection oil return: after part of the frozen oil enters the condenser, the frozen oil can be finally gathered in the evaporator, and the frozen oil gathered in the evaporator can be brought back to the compressor by taking the high-pressure refrigerant as power.
However, even if the oil return system is provided, it is difficult to ensure that the refrigerant oil discharged along with the refrigerant gas can be completely smoothly returned to the compressor during the operation of the refrigerator. Especially, the double-compressor head refrigerating unit has large day and night variation of the suction and exhaust pressure difference in the operation process, and the conditions of oil running and unbalanced oil levels of the two heads are often generated. The equipment is stopped and can not be operated, and part of the refrigerant is discharged and the refrigerant is needed to be supplemented by adopting a common treatment mode. A lot of manpower, financial resources, and time are consumed.
Disclosure of Invention
In order to overcome the defects in the prior art, the utility model aims to provide an engine oil balance auxiliary oil return device for a double-totally-enclosed screw compressor, which can solve the problem of unbalanced oil level of two compressor heads and the problem of low oil level fault treatment on the premise of not additionally supplementing refrigerating engine oil and refrigerant after oil leakage of the compressor heads.
In order to achieve the above purpose, the utility model is realized by adopting the following technical scheme:
the utility model provides an engine oil balance auxiliary oil return device for a double-full-closed screw compressor, which comprises an auxiliary oil return pipeline for auxiliary oil return and oil balance adjustment, wherein the auxiliary oil return pipeline is connected with an oil outlet of a first full-closed screw compressor and an oil outlet of a second full-closed screw compressor in an oil return system; a plurality of observation windows are arranged on the auxiliary oil return pipeline; and the auxiliary oil return pipeline is provided with a plurality of oil discharge valves.
In the utility model, a rubber-plastic heat-insulating cotton is arranged on the observation window and the oil drain valve on the auxiliary oil return pipeline.
The auxiliary oil return pipeline is a three-way pipeline and comprises a first auxiliary oil return passage, a second auxiliary oil return passage and an oil discharge and injection pipeline;
the inlet of the first auxiliary oil return passage is connected with the oil outlet of the first totally-enclosed screw compressor; the inlet of the second auxiliary oil return passage is connected with the oil outlet of the second totally-enclosed screw compressor;
the first auxiliary oil return passage is connected with the second auxiliary oil return passage, and the oil discharging and injecting pipeline is arranged at the joint of the first auxiliary oil return passage and the second auxiliary oil return passage.
The utility model further provides a first oil discharge valve arranged on the first auxiliary oil return passage.
The utility model further provides a second oil discharge valve arranged on the second auxiliary oil return passage.
The utility model further provides a third oil discharge valve arranged on the oil discharge and injection pipeline.
The utility model further provides a first observation window arranged on the first auxiliary oil return passage.
The utility model further provides a second observation window arranged on the second auxiliary oil return passage.
Compared with the prior art, the utility model has the following beneficial effects:
the utility model discloses an auxiliary oil return device for oil balance of a double-full-closed screw compressor, which is characterized in that an auxiliary oil return pipeline can assist oil return and adjust oil balance, and can be used for performing oil balance operation on the oil level of the compressor and preventing the low oil level fault release rate of the compressor. When faults occur, the treatment is carried out without filling refrigerating machine oil and refrigerant additionally, so that the cost of consumables and manpower is saved, and the fault treatment time is effectively shortened. The occurrence frequency of low oil level faults of equipment can be effectively reduced, the fault treatment is convenient, the time is shorter, and the operation and maintenance cost is saved; effectively avoids the pollution of oil discharge and refrigerants to the environment and the related potential safety hazards. Meanwhile, the risk that air enters the refrigerating system is prevented, and the safety and stability of the operation of the whole refrigerating system are improved while the refrigerating efficiency is improved.
Drawings
FIG. 1 is a diagram of a prior art oil return system of the present utility model;
FIG. 2 is a diagram of a compressor oil balancing auxiliary oil return apparatus of the present utility model;
wherein: 1-an auxiliary oil return pipeline; 2-a first viewing window; 3-a first oil drain valve; 4-a second oil drain valve; 5-a third oil drain valve; 6-an oil discharging and injecting pipeline; 7-a condenser; 8-a first fully-enclosed screw compressor; 9-a second fully-enclosed screw compressor; 10-a throttle device; 11-an evaporator; 12-an oil return pipeline; 13-a first oil component device; 14-a second oil component device; 15-a second viewing window; 16-a first auxiliary oil return passage; 17-a second auxiliary oil return passage.
Detailed Description
In order that those skilled in the art will better understand the present utility model, a technical solution in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present utility model and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the utility model described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The utility model is described in further detail below with reference to the attached drawing figures:
the vertical type totally-enclosed screw water-cooling water chilling unit in the prior art comprises an evaporator 11, a condenser 7, a first oil content device 13, a second oil content device 14, a throttling device 10, a first totally-enclosed screw compressor 8, a second totally-enclosed screw compressor 9 and an oil return pipeline 12;
the second outlet of the evaporator 11 is connected with the first inlet of the first totally-enclosed screw compressor 8 through a low-pressure refrigerant gas pipeline, the third outlet of the evaporator 11 is connected with the first inlet of the second totally-enclosed screw compressor 9 through a low-pressure refrigerant gas pipeline, and the first outlet of the evaporator 11 is respectively connected with the low-pressure refrigerant gas pipelines connected with the first inlets of the first totally-enclosed screw compressor 8 and the second totally-enclosed screw compressor 9 through an oil return pipeline 12; the inlet of the evaporator 11 is connected with the first outlet of the condenser through a high-pressure refrigerant liquid pipeline, a throttling device 10 for decompressing and expanding and reducing pressure and temperature is arranged on the high-pressure refrigerant liquid pipeline, the first inlet of the condenser 7 is connected with the first outlet of the first totally-enclosed screw compressor 8, a first oil component device 13 is arranged on a connecting pipeline of the first inlet, the second inlet of the condenser 7 is connected with the first outlet of the second totally-enclosed screw compressor 9, a second oil component device 14 is arranged on a connecting pipeline of the first outlet, the first oil component device 13 and the second oil component device 14 are respectively connected with an oil return pipeline 12, and the second outlet of the condenser 7 is connected with the oil return pipeline 12 through the high-pressure refrigerant gas pipeline.
As shown in fig. 1 and 2, based on the existing vertical totally-enclosed screw water-cooling chiller and an oil return system thereof, the utility model discloses an auxiliary oil return device for balancing compressor oil, which comprises an auxiliary oil return pipeline 1, a first observation window 2, a second observation window 15, a first oil discharge valve 3, a second oil discharge valve 4, a third oil discharge valve 5, an oil discharge and injection pipeline 6, a first auxiliary oil return passage 16 and a second auxiliary oil return passage 17.
The auxiliary oil return pipeline 1 can assist oil return and adjust oil balance; the auxiliary oil return pipeline 1 is arranged between the oil outlets of the two totally-enclosed screw compressors, namely the auxiliary oil return pipeline 1 is connected with the oil outlet of the first totally-enclosed screw compressor 8 and the oil outlet of the second totally-enclosed screw compressor 9; the plurality of observation windows are arranged on the auxiliary oil return pipeline 1, and the observation windows can observe the oil level condition of the auxiliary oil return pipeline 1; the first oil discharge valve 3, the second oil discharge valve 4 and the third oil discharge valve 5 are arranged on the auxiliary oil return pipeline 1, and the first oil discharge valve 3, the second oil discharge valve 4 and the third oil discharge valve 5 are used for discharging and filling oil. The auxiliary oil return pipeline 1 and the observation window 2, the first oil discharge valve 3, the second oil discharge valve 4 and the third oil discharge valve 5 thereon are provided with heat-insulating rubber and plastic cotton.
The auxiliary oil return pipeline 1 is formed by a first auxiliary oil return passage 16; a three-way pipe composed of the second auxiliary oil return passage 17 and the oil drain and filler pipe 6; the inlet and outlet of the first auxiliary oil return passage 16 are connected with the oil inlet and outlet of the first totally-enclosed screw compressor 8, the inlet and outlet of the second auxiliary oil return passage 17 are connected with the oil inlet and outlet of the second totally-enclosed screw compressor 9, the first auxiliary oil return passage 16 is connected with the second auxiliary oil return passage 17, and the junction of the first auxiliary oil return passage 16 and the second auxiliary oil return passage is connected with the oil discharge and injection pipeline 6; further, the drain-filler pipe 6 is provided at an intermediate position of the connected first auxiliary oil return passage 16 and second auxiliary oil return passage 17.
The first oil drain valve 3 and the third oil drain valve 5 are respectively arranged on the first auxiliary oil return passage 16 and the second auxiliary oil return passage 17; the second oil discharge valve 4 is arranged on the oil discharge and injection pipeline 6; the oil and drain pipelines and the oil and drain and filler pipeline 6 formed by the first auxiliary oil return passage 16 and the second auxiliary oil return passage 17 can be provided with observation windows. Further, the first auxiliary oil return passage 16 is provided with a first observation window 2, the second auxiliary oil return passage 17 is provided with a second observation window 15, and the drain and filler pipe 6 may be provided with an observation window.
As an alternative scheme, the auxiliary oil return device for balancing the compressor oil comprises an oil way copper pipe, an observation window is arranged on the oil way copper pipe, a three-way oil drain pipe, namely an oil drain and oil injection pipeline 6, is welded in the middle of the oil way copper pipe, and is provided with an oil drain ball valve, namely a second oil drain valve 4, two sides of the oil way copper pipe are respectively connected with a two-way ball valve, namely a first oil drain valve 3 and a second oil drain valve 5, and pipelines at the rear ends of the ball valves are respectively connected to oil injection ports at the bottoms of two compressor heads; the oil way copper pipe, the auxiliary valve, the observation window and the like are insulated by rubber plastic insulation cotton, and safety marks for preventing trampling and the like are posted.
The using method is as follows:
when the oil levels of the two compressor heads are unbalanced, the copper pipe ball valves communicated with the two compressors are opened to perform oil balancing operation. When one compressor head is stopped at a low oil level, the other compressor can be operated to receive oil, and then the balance operation of the compressor oil is carried out, and the supplementary refrigerating oil is transferred to the low oil level compressor (the operating compressor pressure is higher than the pressure of the compressor which is stopped, and the oil is transferred by the pressure difference) until the oil level is normal. And after the oil level rises to the visual oil level of the window, starting the machine to collect oil, recovering the oil from the system into the compressor head, discharging excessive refrigerating machine oil through an oil discharging and injecting pipeline 6, and controlling the oil level to be normal by injecting and discharging oil through the oil discharging and injecting pipeline 6, wherein the operation process can be observed and judged through an oil path observation window. The occurrence frequency of low oil level faults of equipment is effectively reduced, the fault treatment is convenient, the time is shorter, and the operation and maintenance cost is saved.
The above is only for illustrating the technical idea of the present utility model, and the protection scope of the present utility model is not limited by this, and any modification made on the basis of the technical scheme according to the technical idea of the present utility model falls within the protection scope of the claims of the present utility model.
Claims (8)
1. The auxiliary oil return device for the oil balance of the double-full-closed screw compressor is characterized by comprising an auxiliary oil return pipeline (1) for auxiliary oil return and oil balance adjustment, wherein the auxiliary oil return pipeline (1) is connected with an oil outlet of a first full-closed screw compressor (8) and an oil outlet of a second full-closed screw compressor (9) in an oil return system; a plurality of observation windows are arranged on the auxiliary oil return pipeline (1); the auxiliary oil return pipeline (1) is provided with a plurality of oil discharge valves.
2. The auxiliary oil return device for balancing compressor oil according to claim 1, wherein a rubber-plastic heat-insulating cotton is arranged on an observation window on the auxiliary oil return pipeline (1) and an oil discharge valve.
3. The auxiliary oil return device for balancing compressor oil according to claim 1, characterized in that the auxiliary oil return line (1) is a three-way pipe comprising a first auxiliary oil return passage (16), a second auxiliary oil return passage (17) and an oil extraction and injection line (6);
the inlet of the first auxiliary oil return passage (16) is connected with the oil outlet of the first totally-enclosed screw compressor (8); the inlet of the second auxiliary oil return passage (17) is connected with the oil outlet of the second totally-enclosed screw compressor (9);
the first auxiliary oil return passage (16) is connected with the second auxiliary oil return passage (17), and the oil discharge and injection pipeline (6) is arranged at the joint of the first auxiliary oil return passage (16) and the second auxiliary oil return passage (17).
4. A compressor oil balance auxiliary oil return device according to claim 3, characterized in that the first auxiliary oil return passage (16) is provided with a first oil discharge valve (3).
5. A compressor oil balance auxiliary oil return device according to claim 3, characterized in that the second auxiliary oil return passage (17) is provided with a second oil discharge valve (5).
6. A compressor oil balance auxiliary oil return device according to claim 3, characterized in that the oil drain and filler pipe (6) is provided with a third oil drain valve (4).
7. A compressor oil balance auxiliary oil return device according to claim 3, characterized in that the first auxiliary oil return passage (16) is provided with a first viewing window (2).
8. A compressor oil balance auxiliary oil return device according to claim 3, characterized in that the second auxiliary oil return passage (17) is provided with a second viewing window (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223591041.1U CN218972935U (en) | 2022-12-29 | 2022-12-29 | Auxiliary oil return device for oil balance of double-full-closed screw compressor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223591041.1U CN218972935U (en) | 2022-12-29 | 2022-12-29 | Auxiliary oil return device for oil balance of double-full-closed screw compressor |
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| CN218972935U true CN218972935U (en) | 2023-05-05 |
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| CN202223591041.1U Active CN218972935U (en) | 2022-12-29 | 2022-12-29 | Auxiliary oil return device for oil balance of double-full-closed screw compressor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117433189A (en) * | 2023-11-30 | 2024-01-23 | 浙江红五环机械股份有限公司 | Auxiliary oil return device for oil balance of double-full-closed screw compressor |
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2022
- 2022-12-29 CN CN202223591041.1U patent/CN218972935U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117433189A (en) * | 2023-11-30 | 2024-01-23 | 浙江红五环机械股份有限公司 | Auxiliary oil return device for oil balance of double-full-closed screw compressor |
| CN117433189B (en) * | 2023-11-30 | 2024-06-07 | 浙江红五环机械股份有限公司 | Auxiliary oil return device for oil balance of double-full-closed screw compressor |
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