Return oil filtering device of screw unit

Abstract

The utility model discloses a screw unit oil return filtering device which comprises a hollow tank body, a connector and a stainless steel filtering inner core, an oil inlet connecting base is arranged at the end of the connector, a sealing head base is installed at the other end of the hollow tank body, and the sealing head base is assembled at the opening portion of the other end of the hollow tank body. An oil inlet bowl opening is formed in one end of the stainless steel filter inner core, a flow opening is formed in the bottom of the oil inlet bowl opening, a filter core column located in an inner cavity of the stainless steel filter inner core is installed at one end of the flow opening, and a filter material sleeve is installed on the outer ring of the filter core column in a sleeving mode and located between the stainless steel filter inner core and the filter core column. And an oil leakage sleeve is mounted at one end of the seal head seat. Segmented machining is facilitated, the hollow tank body is not machined, the strength of the hollow tank body is guaranteed, meanwhile, the oil leakage sleeve and the hollow tank body can be separated conveniently, the stainless steel filter inner core and other components in the hollow tank body can be detached conveniently, and better cleaning and replacement are facilitated.

Description

Technical Field

[0001] This utility model relates to the field of screw compressor technology, and in particular to a screw compressor oil return filtration device. Background Technology

[0002] Water-cooled screw chillers typically use flooded or falling film evaporators. Due to the limitations of the compressor structure, their built-in oil separators cannot meet the overall unit operation requirements, necessitating the addition of an external oil separator. This is achieved using a secondary oil separation and return scheme for water-cooled screw chillers. The bottom of the oil separator is connected to the compressor suction port via a bypass connection. The oil separated by the secondary oil separator returns to the compressor suction port through pressure differential. Due to varying unit operating loads, the bypass flow rate differs, easily leading to issues of excessive or insufficient bypass volume. When the bypass volume is large, it results in a large refrigerant bypass volume, affecting unit performance. When the bypass volume is small, the oil return is insufficient, preventing the unit from operating normally. Simultaneously, the returned oil directly enters the suction port, with some returning to the oil sump and the rest being discharged with the refrigerant, resulting in low oil return efficiency.

[0003] When using an oil return device, a filtration system is required to ensure the quality of the oil and minimize the impurities in it. Existing filtration technology uses a tank structure with an oil outlet at the bottom and a filter element installed inside. However, this method has the disadvantage that the filter element inside the tank cannot be disassembled for cleaning, and the oil outlet is integrally formed with the tank. The excessive number of processing cycles and the resulting damage to the tank's strength further complicate the process. Therefore, we have designed an oil return filtration device for screw compressor units. Utility Model Content

[0004] The purpose of this invention is to provide a screw compressor oil return filtration device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a screw compressor unit oil return filtration device, comprising a hollow tank, a connecting joint, and a stainless steel filter core. The connecting joint is welded and installed at the opening at one end of the hollow tank. An oil inlet connecting seat is provided at the end of the connecting joint. A head seat is installed at the other end of the hollow tank. The head seat is assembled at the opening at the other end of the hollow tank. An oil inlet cup is installed at one end of the stainless steel filter core. A flow port is provided at the bottom of the oil inlet cup. A filter core column located inside the cavity of the stainless steel filter core is installed at one end of the flow port. A filter media sleeve is fitted around the outer ring of the filter core column. The filter media sleeve is located between the stainless steel filter core and the filter core column. An oil leakage sleeve is installed at one end of the head seat.

[0006] Preferably, it also includes a connecting mechanism, which includes a connecting plate, a pin handle, and a pin insertion part. The pin insertion part is integrally formed with the pin handle and is inserted into the channel of the connecting plate. The connecting plate is connected to the end cap seat.

[0007] Preferably, the hollow tank body has an assembly hole on its outer wall, and the assembly hole is inserted into the pin insertion part.

[0008] Preferably, the other end of the end cap is provided with a tank connecting ring, and an oil guide column is provided at the inner ring of the tank connecting ring.

[0009] Preferably, a magnetic ring is provided at the end of the tank connecting ring, and one end of the magnetic ring is magnetically connected to the stainless steel filter core.

[0010] Preferably, the filter media sleeve has the same filtration gap as the stainless steel filter inner core and the filter core column, and the filter media sleeve is a ceramic filter sleeve structure.

[0011] The technical effects and advantages of this utility model are as follows:

[0012] (1) The present invention provides a screw compressor oil return filter device, which installs an oil leakage sleeve at one end of the end cap seat and also provides a connecting mechanism. The connecting mechanism includes a connecting plate, a pin handle and a pin insertion part. The pin insertion part and the pin handle are integrally formed. The pin insertion part is inserted into the channel of the connecting plate and the connecting plate is connected to the end cap seat. This facilitates segmented processing, and the hollow tank does not need to be processed, ensuring the strength of the hollow tank itself. At the same time, it is convenient to separate the oil leakage sleeve from the hollow tank, so that the stainless steel filter core and other components inside the hollow tank can be easily disassembled for better cleaning and replacement. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0014] Figure 2 This is a schematic diagram of the stainless steel filter core of this utility model.

[0015] Figure 3 This is an exploded structural diagram of the connecting mechanism of this utility model.

[0016] In the diagram: 1. Hollow tank body; 2. Connecting joint; 3. Oil inlet connector; 4. Stainless steel filter core; 5. Oil inlet bowl; 6. End cap seat; 7. Tank connecting ring; 8. Oil guide column; 9. Leaking sleeve; 10. Magnetic ring; 11. Connecting plate; 12. Pin handle; 13. Pin insertion part; 14. Filter core column; 15. Filter media sleeve; 16. Flow port; 17. Assembly hole. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] This utility model provides, for example Figure 1-3 The image shows a screw compressor unit oil return filtration device;

[0019] Example 1: The oil return filtration device includes a hollow tank 1, a connecting joint 2, and a stainless steel filter core 4. The connecting joint 2 is welded to the opening at one end of the hollow tank 1. An oil inlet connecting seat 3 is provided at the end of the connecting joint 2. A head seat 6 is installed at the other end of the hollow tank 1. The head seat 6 is assembled at the opening at the other end of the hollow tank 1. An oil inlet bowl 5 is installed at one end of the stainless steel filter core 4. An outlet 16 is provided at the bottom of the oil inlet bowl 5. A filter core column 14 located in the inner cavity of the stainless steel filter core 4 is installed at one end of the outlet 16. A filter media sleeve 15 is sleeved on the outer ring of the filter core column 14. The filter media sleeve 15 is located between the stainless steel filter core 4 and the filter core column 14. An oil leakage sleeve 9 is installed at one end of the head seat 6.

[0020] Among them: such as Figure 2 As shown, it also includes a connecting mechanism, which includes a connecting plate 11, a pin handle part 12 and a pin insertion part 13. The pin insertion part 13 and the pin handle part 12 are integrally formed. The pin insertion part 13 is inserted into the channel of the connecting plate 11. The connecting plate 11 is connected to the end cap seat 6. An assembly hole 17 is provided on the outer wall of the hollow tank body 1. The assembly hole 17 is inserted into the pin insertion part 13.

[0021] In order to ensure the accuracy and effect of filtration, the filter media sleeve 15, the stainless steel filter inner core 4, and the filter core column 14 have the same filtration gap, and the filter media sleeve 15 is a ceramic filter sleeve structure.

[0022] The above solution separates the hollow tank 1 from the oil leakage sleeve 9, allowing the oil leakage sleeve 9 to separate the hollow tank 1. The hollow tank 1 itself does not need to undergo multiple processing steps and is directly obtained by injection molding, ensuring good structural strength. At the same time, the separate design facilitates the removal of the stainless steel filter core 4 and timely cleaning of the stainless steel filter core 4.

[0023] Example 2: The oil return filtration device includes a hollow tank 1, a connecting joint 2, and a stainless steel filter core 4. The connecting joint 2 is welded to the opening at one end of the hollow tank 1. An oil inlet connecting seat 3 is provided at the end of the connecting joint 2. A head seat 6 is installed at the other end of the hollow tank 1, and the head seat 6 is assembled at the opening at the other end of the hollow tank 1. An oil inlet cup 5 is installed at one end of the stainless steel filter core 4. An outlet 16 is provided at the bottom of the oil inlet cup 5, and one end of the outlet 16 is... A filter core column 14 is installed inside the stainless steel filter core 4. A filter media sleeve 15 is fitted around the outer ring of the filter core column 14. The filter media sleeve 15 is located between the stainless steel filter core 4 and the filter core column 14. An oil leakage sleeve 9 is installed at one end of the end cap 6. A tank connecting ring 7 is set at the other end of the end cap 6. An oil guide column 8 is set at the inner ring of the tank connecting ring 7. A magnetic ring 10 is set at the end of the tank connecting ring 7. One end of the magnetic ring 10 is magnetically connected to the stainless steel filter core 4.

[0024] This design is intended to ensure good connection and sealing when the head seat 6 is assembled into the hollow tank 1, and to ensure that the filtered oil can enter the oil leakage sleeve 9 through the oil guide column 8, and then enter the screw compressor unit through the oil leakage sleeve 9.

[0025] Contents not described in detail herein are existing technologies known to those skilled in the art. The specific embodiments described herein are merely illustrative examples illustrating the spirit of this invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this invention or exceeding the scope defined by the appended claims.

Claims

1. A screw compressor unit return oil filtration device, comprising a hollow tank (1), a connecting joint (2), and a stainless steel filter core (4), characterized in that, The connecting joint (2) is welded and installed at the opening of one end of the hollow tank (1). An oil inlet connecting seat (3) is provided at the end of the connecting joint (2). A head seat (6) is installed at the other end of the hollow tank (1). The head seat (6) is assembled at the opening of the other end of the hollow tank (1). An oil inlet bowl (5) is installed at one end of the stainless steel filter core (4). An outlet (16) is provided at the bottom of the oil inlet bowl (5). A filter core column (14) located in the inner cavity of the stainless steel filter core (4) is installed at one end of the outlet (16). A filter media sleeve (15) is fitted on the outer ring of the filter core column (14). The filter media sleeve (15) is located between the stainless steel filter core (4) and the filter core column (14). An oil leakage sleeve (9) is installed at one end of the head seat (6).

2. The screw compressor unit oil return filtration device according to claim 1, characterized in that, It also includes a connecting mechanism, which includes a connecting plate (11), a pin handle (12) and a pin insertion part (13). The pin insertion part (13) and the pin handle (12) are integrally formed. The pin insertion part (13) is inserted into the channel of the connecting plate (11). The connecting plate (11) is connected to the end cap (6).

3. The screw compressor unit oil return filtration device according to claim 2, characterized in that, The hollow tank (1) has an assembly hole (17) on its outer wall, and the assembly hole (17) is inserted into the pin insertion part (13).

4. The screw compressor unit oil return filter device according to claim 1, characterized in that, The other end of the end cap (6) is provided with a tank connecting ring (7), and an oil guide column (8) is provided at the inner ring of the tank connecting ring (7).

5. The screw compressor unit oil return filtration device according to claim 4, characterized in that, A magnetic ring (10) is provided at the end of the tank connecting ring (7), and one end of the magnetic ring (10) is magnetically connected to the stainless steel filter core (4).

6. The screw compressor unit oil return filtration device according to claim 1, characterized in that, The filter media sleeve (15) has the same filtration gap as the stainless steel filter inner core (4) and the filter core column (14), and the filter media sleeve (15) is a ceramic filter sleeve structure.

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