Screw compressor rotor structure and screw compressor

Abstract

The invention belongs to the technical field of compressors, and discloses a screw compressor rotor structure and a screw compressor, the screw compressor rotor structure comprises a mounting plate, fixing blocks are fixedly connected to four corners of one side of the mounting plate, top blocks are movably connected to the interiors of the fixing blocks, and a top frame is fixedly connected to the tops of the top blocks; the bottom of the top frame is movably connected with a top spring, the top of the top spring is rotationally connected with a threaded rod, and the top of the threaded rod is fixedly connected with a connecting column. By arranging the auxiliary liquid spraying pipe, a top block, a top frame, a blocking plate, a spring belt and other structures, a first motor drives a threaded rod to rotate through a connecting column, the top frame and the threaded rod rotate in a threaded mode, the top frame moves downwards along the rod wall of the threaded rod, and the top frame pushes the top block to move downwards, so that when the temperature of the compressor rotor is too high, the compressor rotor cannot be blocked; and the cooling liquid can form multiple strands to comprehensively spray the compressor rotor, so that the temperature of the compressor rotor can be reduced, and the compressor is not easy to damage.

Description

Technical Field

[0001] The invention belongs to the technical field of compressors, and in particular to a screw compressor rotor structure and a screw compressor. Background Art

[0002] Screw compressors are divided into single-screw compressors and twin-screw compressors. Screw compressors achieve the gas compression process through a pair of intermeshing rotors. The two rotors rotate in opposite directions in a precision-machined housing to form a series of closed spaces. As the rotors rotate, the gas is gradually sucked in and compressed in these closed spaces and finally discharged through the outlet. The so-called screw compressor refers to a twin-screw compressor. In the compressor body, a pair of intermeshing spiral rotors are arranged in parallel. The rotor with convex teeth outside the pitch circle is usually called a male rotor or a male screw, and the rotor with concave teeth inside the pitch circle is called a female rotor or a female screw.

[0003] Screw air compressors generate a lot of heat during operation. If the high temperature condition cannot be handled in time, it will cause serious damage to the screw air compressor and cause internal machine failure of the screw air compressor. Therefore, a series of cooling measures are needed to reduce the temperature of the screw air compressor. The common cooling methods of screw air compressors are air cooling and water cooling. Both methods can reduce the temperature of the screw air compressor.

[0004] In the prior art, a screw compressor releases a large amount of heat during the process of compressing gas from low pressure to high pressure. The compressor rotor expands due to the heat. If the reserved gap is smaller than the expansion amount of the rotor, the compressor will cause seizure and damage to the compressor. Therefore, the screw compressor rotor will absorb the heat generated by compression through external coolant heat exchange. During the coolant heat exchange process, the cooling device usually sprays a single stream of coolant into the compressor through a single spray pipe to cool the compressor rotor. During the cooling process, if the compressor rotor temperature is too high, the coolant cannot fully spray the compressor rotor, which will still cause the compressor rotor temperature to fail to decrease, thereby making the compressor susceptible to damage. A screw compressor rotor structure and a screw compressor are proposed to solve the above problems. Summary of the invention

[0005] In order to solve the problems raised in the above background technology, the present invention provides a screw compressor rotor structure and a screw compressor, which solves the problem that the coolant cannot be fully sprayed on the compressor rotor, which still causes the compressor rotor temperature to be unable to be reduced, thereby making the compressor susceptible to damage.

[0006] To achieve the above object, the present invention provides the following technical solutions: a screw compressor rotor structure, comprising a mounting plate, wherein four corners of one side of the mounting plate are fixedly connected to fixed blocks, a top block is movably connected inside the fixed block, a top frame is fixedly connected to the top of the top block, a top spring is movably connected to the bottom of the top frame, a threaded rod is rotatably connected to the top of the top spring, a connecting column is fixedly connected to the top of the threaded rod, and a first motor is fixedly connected to the middle of the connecting column; The outside of the first motor is fixedly connected to a motor fixing frame, both sides of the top block are abutted with blocking plates, one side of the two blocking plates is fixedly connected to a limiting block, the other side of the blocking plate is fixedly connected to an extrusion rod, the outside of the extrusion rod is movably sleeved with an extrusion spring, the inside of the blocking plate is fixedly connected to a fixing ring, and the inside of the fixing ring is fixedly connected to a spring belt.

[0007] Preferably, one side of the fixing block is fixedly connected to the main liquid spray pipe, a top hole matching the size of the top block is opened on the top of the mounting plate, and the bottom of the top block is a triangular structure.

[0008] Preferably, a connecting hole is opened in the middle of the mounting plate, both sides of the connecting hole are fixedly connected to the auxiliary liquid spraying pipe, and the outer diameter of the top frame is equal to the width of the top block.

[0009] Preferably, the top spring comprises a rotating plate, and a tension belt is fixedly connected to the bottom of the rotating plate.

[0010] Preferably, the outside of the rotating plate is rotatably connected to the threaded rod, and the bottom end of the stretching belt is fixedly connected to the top block.

[0011] Preferably, a mounting groove is provided inside the threaded rod, and the rotating plate and the stretching belt are both located inside the mounting groove.

[0012] Preferably, one side of the motor fixing frame is fixedly connected to the main spray pipe, the tops of the two blocking plates form an acute-angled triangular groove, and grooves matching the size of the limit block are opened on the four sides of the upper, lower, left and right inside the mounting plate.

[0013] Preferably, one end of the extrusion rod is fixedly connected to the inside of the mounting plate, one end of the extrusion spring is fixedly connected to the blocking plate, and the other end of the extrusion spring is fixedly connected to the inside of the mounting plate.

[0014] A screw compressor comprises a compressor housing, wherein a main liquid injection port is provided at the top of the compressor housing, auxiliary liquid injection ports are provided on both sides of the main liquid injection port, a main liquid injection pipe is clamped on the outside of the main liquid injection port, and auxiliary liquid injection pipes are clamped on the outsides of two auxiliary liquid injection ports.

[0015] Preferably, the exteriors of the two auxiliary liquid spraying ports do not contact the main liquid spraying port, the main liquid spraying port is located between the two auxiliary liquid spraying ports, and the auxiliary liquid spraying pipe is an L-shaped structure.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The present invention is provided with structures such as auxiliary liquid spray pipe, top block, top frame, blocking plate, spring belt and the like, so that the first motor drives the threaded rod to rotate through the connecting column, the top frame and the threaded rod are threadedly rotated, the top frame moves down along the rod wall of the threaded rod, the top frame pushes the top block to move down, the top spring is stretched and lengthened, the top block pushes open the blocking plates abutting on both sides, the limit block slides along the groove through the blocking plate, the extrusion rod and the extrusion spring are compressed, the spring belt is stretched and straightened because the blocking plates fixedly connected at both ends are pushed open, so that when the temperature of the compressor rotor is too high, the coolant can form multiple streams to spray the compressor rotor comprehensively, so that the temperature of the compressor rotor can be reduced, thereby making the compressor less likely to be damaged; The present invention is provided with a main liquid spray pipe, an auxiliary liquid spray pipe, a top block, a threaded rod, a first motor and other structures. When the coolant is sprayed into the main liquid spray pipe, the first motor drives the connecting column to rotate, the connecting column drives the threaded rod to rotate, the top frame moves downward along the rod wall of the threaded rod, the top frame pushes the top block to move downward, the top block pushes open the blocking plates abutting on both sides, and the coolant flows to the compressor rotor through the through holes between the blocking plates to cool it, so that the temperature of the compressor rotor in the screw compressor is reduced, the compressor is not easily damaged, and its service life is extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall relationship structure of the present invention; Figure 2 It is a schematic diagram of the positional relationship structure of the auxiliary liquid spray pipe of the present invention; Figure 3 It is a schematic diagram of the position relationship structure of the mounting plate of the present invention; Figure 4 This is a schematic diagram of the positional relationship structure of the blocking plate of the present invention; Figure 5 It is a schematic diagram of the cross-sectional relationship structure of the blocking plate of the present invention; Figure 6 For the present invention Figure 5 Schematic diagram of the enlarged relationship structure at A in the middle.

[0018] In the figure: 1. compressor housing; 2. main liquid spray port; 3. auxiliary liquid spray port; 4. main liquid spray pipe; 5. auxiliary liquid spray pipe; 6. mounting plate; 7. fixing block; 8. top block; 9. top frame; 10. top spring; 11. threaded rod; 12. connecting column; 13. first motor; 14. motor fixing frame; 15. blocking plate; 16. limiting block; 17. extrusion rod; 18. extrusion spring; 19. fixing ring; 20. spring belt. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] like Figures 1 to 6 As shown, the present invention provides a screw compressor rotor structure, including a mounting plate 6, a fixing block 7 is fixedly connected at four corners of one side of the mounting plate 6, a top block 8 is movably connected inside the fixing block 7, a top frame 9 is fixedly connected to the top of the top block 8, a top spring 10 is movably connected to the bottom of the top frame 9, a threaded rod 11 is rotatably connected to the top of the top spring 10, a connecting column 12 is fixedly connected to the top of the threaded rod 11, and a first motor 13 is fixedly connected to the middle of the connecting column 12; The outside of the first motor 13 is fixedly connected with a motor fixing frame 14, both sides of the top block 8 are abutted with blocking plates 15, one side of the two blocking plates 15 is fixedly connected with a limiting block 16, the other side of the blocking plate 15 is fixedly connected with an extrusion rod 17, the outside of the extrusion rod 17 is movably sleeved with an extrusion spring 18, the inside of the blocking plate 15 is fixedly connected with a fixing ring 19, and the inside of the fixing ring 19 is fixedly connected with a spring belt 20; The above scheme is adopted: the main liquid spray pipe 4 and the auxiliary liquid spray pipe 5 are respectively fixedly connected with the compressor housing 1 through the main liquid spray port 2 and the auxiliary liquid spray port 3, and the cooling device sprays the coolant into the compressor housing 1 through the main liquid spray pipe 4 and the auxiliary liquid spray pipe 5 to cool the compressor rotor. When the coolant is sprayed into the main liquid spray pipe 4, the first motor 13 drives the threaded rod 11 to rotate through the connecting column 12, and the top frame 9 and the threaded rod 11 are threadedly rotated, and the top frame 9 moves down along the rod wall of the threaded rod 11, and the top frame 9 pushes the top block 8 to move down, and the top spring 10 stretches and lengthens, and the top block 8 pushes open the blocking plates 15 abutting on both sides. This process can control the size of the through hole of the auxiliary liquid spray pipe 3, and the size of the water volume can be controlled by the size of the through hole, thereby controlling the water flow of the coolant to cool the compressor rotor; After the blocking plate 15 is pushed open, the limit block 16 slides along the groove through the blocking plate 15, the extrusion rod 17 and the extrusion spring 18 are both compressed, and the spring belt 20 is stretched and straightened because the blocking plate 15 fixedly connected at both ends is pushed open, and a through hole with the same width as the top block 8 is formed between the two blocking plates 15. The coolant is diverted from the inside of the main spray pipe 4 through the auxiliary spray pipe 5 connected on both sides, and the coolant is sprayed onto the compressor rotor through the main spray port 2 and the auxiliary spray port 3 to cool it. This circulation mode of the coolant can control multiple water flows to cool the rotor, improve the cooling effect, and extend the service life of the compressor. When the temperature of the compressor rotor is too high, the coolant can form multiple streams to spray the compressor rotor comprehensively, so that the temperature of the compressor rotor can be reduced, thereby making the compressor less likely to be damaged.

[0021] like Figure 2 , Figure 4 , Figure 5 , Figure 6 As shown, one side of the fixing block 7 is fixedly connected to the main liquid spray pipe 4, a top hole matching the size of the top block 8 is opened on the top of the mounting plate 6, the bottom of the top block 8 is a triangular structure, a connecting hole is opened in the middle of the mounting plate 6, both sides of the connecting hole are fixedly connected to the auxiliary liquid spray pipe 5, and the outer diameter of the top frame 9 is equal to the width of the top block 8; The above scheme is adopted: the auxiliary liquid spray pipe 5 is fixedly connected to the mounting plate 6 through the connecting hole, the coolant can flow into the interior of the auxiliary liquid spray pipe 5 through the connecting hole, and then flow to the compressor rotor running inside the compressor housing 1 through the inner wall of the auxiliary liquid spray pipe 5, the fixing block 7 is fixedly connected through the main liquid spray pipe 4, the fixing block 7 supports and fixes the mounting plate 6 through the main liquid spray pipe 4, and a top cavity is opened inside the mounting plate 6, and the blocking plate 15 is limited by the top cavity.

[0022] like Figure 5 , Figure 6 As shown, the top spring 10 includes a rotating plate, a stretching belt is fixedly connected to the bottom of the rotating plate, the outside of the rotating plate is rotatably connected to the threaded rod 11, the bottom end of the stretching belt is fixedly connected to the top block 8, and a mounting groove is opened inside the threaded rod 11, and the rotating plate and the stretching belt are both located inside the mounting groove; The above scheme is adopted: the mounting groove is a T-shaped structure, the mounting groove is opened in the middle of the threaded rod 11, the rotating plate is limited by the mounting groove, the rotating plate limits and fixes the stretching belt, the top end of the stretching belt is fixedly connected to the rotating plate, the top block 8 is connected to the threaded rod 11 through the stretching belt, the rotating plate is a circular structure, when the first motor 13 drives the threaded rod 11 to rotate, when the coolant is sprayed into the main spray pipe 4, the first motor 13 drives the threaded rod 11 to rotate through the connecting column 12; The top frame 9 and the threaded rod 11 are threadedly rotated, and the top frame 9 moves downward along the rod wall of the threaded rod 11. The top frame 9 pushes the top block 8 to move downward, and the top spring 10 is stretched and lengthened. The top block 8 pushes open the blocking plates 15 abutting on both sides, and a through hole with the same width as the top block 8 is formed between the two blocking plates 15. The coolant is diverted from the inside of the main spray pipe 4 through the auxiliary spray pipe 5 connected on both sides, and the coolant is sprayed onto the compressor rotor through the main spray port 2 and the auxiliary spray port 3 to cool it down. The top hole inside the mounting plate 6 limits the top frame 9 through the top block 8, so that the threaded rod 11 cannot drive the top frame 9 to rotate when it rotates, and the top frame 9 can only move up and down when the threaded rod 11 rotates.

[0023] like Figure 4 , Figure 5 , Figure 6 As shown, one side of the motor fixing frame 14 is fixedly connected to the main liquid spray pipe 4, the tops of the two blocking plates 15 form an acute-angled triangular groove, and the four sides of the upper, lower, left, and right inside the mounting plate 6 are all provided with grooves adapted to the size of the limit block 16, one end of the extrusion rod 17 is fixedly connected to the inside of the mounting plate 6, one end of the extrusion spring 18 is fixedly connected to the blocking plate 15, and the other end of the extrusion spring 18 is fixedly connected to the inside of the mounting plate 6; The above scheme is adopted: the motor fixing frame 14 is supported and fixed by the main liquid spraying pipe 4, and the motor fixing frame 14 limits and fixes the first motor 13. When the first motor 13 drives the threaded rod 11 to rotate through the connecting column 12, the bottom end of the threaded rod 11 gradually does not contact the bottom of the top frame 9, and the top frame 9 gradually moves downward along the rod wall of the threaded rod 11, and pushes the top block 8 to move downward, and the blocking plate 15 is limited and supported by the extrusion rod 17, and the extrusion rod 17 is made of elastic compressible material; After the blocking plate 15 is pushed open, the limit block 16 slides along the groove through the blocking plate 15, the extrusion rod 17 and the extrusion spring 18 are compressed, and the spring belt 20 is stretched and straightened because the blocking plate 15 fixedly connected at both ends is pushed open, and a through hole with the same width as the top block 8 is formed between the two blocking plates 15. The coolant is diverted from the inside of the main spray pipe 4 through the auxiliary spray pipes 5 connected on both sides, so that when the temperature of the compressor rotor is too high, the coolant can form multiple streams, which can better cool the compressor rotor; The extrusion spring 18 is movably connected to the extrusion rod 17, which will not affect the compression of the extrusion rod 17 and the extrusion spring 18 when the blocking plate 15 moves. The extrusion rod 17 can prevent the extrusion spring 18 from twisting during compression or stretching. The extrusion rod 17 can ensure that the extrusion spring 18 will not twist during compression or stretching. The two blocking plates 15 are held by the spring belt 20. The extrusion rod 17 and the extrusion spring 18 can quickly close the two blocking plates 15 by their own elastic force when the top block 8 moves up. An annular groove matching the size of the fixing ring 19 is opened inside the blocking plate 15. The fixing ring 19 is fixedly connected to the inside of the blocking plate 15 through the annular groove, and the spring belt 20 is fixedly connected through the fixing ring 19.

[0024] A screw compressor comprises a compressor housing 1, a main liquid injection port 2 is formed at the top of the compressor housing 1, auxiliary liquid injection ports 3 are formed on both sides of the main liquid injection port 2, a main liquid injection pipe 4 is clamped on the outside of the main liquid injection port 2, auxiliary liquid injection pipes 5 are clamped on the outside of two auxiliary liquid injection ports 3, the outsides of the two auxiliary liquid injection ports 3 are not in contact with the main liquid injection port 2, the main liquid injection port 2 is located between the two auxiliary liquid injection ports 3, and the auxiliary liquid injection pipe 5 is an L-shaped structure; The above scheme is adopted: the coolant flowing into the main liquid spray pipe 4 is diverted through the auxiliary liquid spray pipes 5 on both sides, and the coolant can be better sprayed on the outside of the compressor rotor through the auxiliary liquid spray port 3 through the auxiliary liquid spray pipe 5, so as to cool the compressor rotor. The outside of the auxiliary liquid spray pipe 5 is fixedly connected to the mounting plate 6, and the channel of the auxiliary liquid spray pipe 5 is closed by the blocking plate 15. When multiple streams of coolant are not needed to cool the compressor rotor, the coolant will not be diverted.

[0025] The working principle and use process of the present invention: First, when the compressor rotor is heated and expanded to cool it, the main liquid spray pipe 4 and the auxiliary liquid spray pipe 5 are fixedly connected to the compressor housing 1 through the main liquid spray port 2 and the auxiliary liquid spray port 3 respectively, and the cooling device sprays the coolant into the compressor housing 1 through the main liquid spray pipe 4 and the auxiliary liquid spray pipe 5 to cool the compressor rotor; When the coolant is sprayed into the main spray pipe 4, the first motor 13 drives the threaded rod 11 to rotate through the connecting column 12, and the top frame 9 and the threaded rod 11 are threadedly rotated. At this time, the top frame 9 moves down along the rod wall of the threaded rod 11, and the top frame 9 pushes the top block 8 to move down, and the top spring 10 is stretched and lengthened. At this time, the top block 8 pushes open the blocking plates 15 abutting on both sides; After the blocking plate 15 is pushed open, the limit block 16 slides along the groove through the blocking plate 15. At this time, the extrusion rod 17 and the extrusion spring 18 are both compressed, and the spring belt 20 is stretched and straightened because the blocking plate 15 fixedly connected at both ends is pushed open. At this time, a through hole with the same width as the top block 8 is formed between the two blocking plates 15, and the coolant is diverted from the inside of the main spray pipe 4 through the auxiliary spray pipes 5 connected on both sides. At this time, the coolant is sprayed to the compressor rotor through the main spray port 2 and the auxiliary spray port 3 to cool it down, and the operation is completed.

[0026] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A screw compressor rotor structure, comprising a mounting plate (6), characterized in that: A fixing block (7) is fixedly connected to each of the four corners of one side of the mounting plate (6); a top block (8) is movably connected to the interior of the fixing block (7); a top frame (9) is fixedly connected to the top of the top block (8); a top spring (10) is movably connected to the bottom of the top frame (9); a threaded rod (11) is rotatably connected to the top of the top spring (10); a connecting column (12) is fixedly connected to the top of the threaded rod (11); a first motor (13) is fixedly connected to the middle of the connecting column (12); The outside of the first motor (13) is fixedly connected to a motor fixing frame (14), both sides of the top block (8) are abutted against blocking plates (15), one side of the two blocking plates (15) is fixedly connected to a limiting block (16), the other side of the blocking plate (15) is fixedly connected to an extrusion rod (17), the outside of the extrusion rod (17) is movably sleeved with an extrusion spring (18), the inside of the blocking plate (15) is fixedly connected to a fixing ring (19), and the inside of the fixing ring (19) is fixedly connected to a spring belt (20).

2. The screw compressor rotor structure according to claim 1, characterized in that: One side of the fixed block (7) is fixedly connected to the main liquid spray pipe (4), the top of the mounting plate (6) is provided with a top hole that matches the size of the top block (8), and the bottom of the top block (8) is a triangular structure.

3. The screw compressor rotor structure according to claim 1, characterized in that: A communication hole is provided in the middle of the mounting plate (6), both sides of the communication hole are fixedly connected to the auxiliary liquid spray pipe (5), and the outer diameter of the top frame (9) is equal to the width of the top block (8).

4. The screw compressor rotor structure according to claim 1, characterized in that: The top spring (10) comprises a rotating plate, and a tension belt is fixedly connected to the bottom of the rotating plate.

5. The screw compressor rotor structure according to claim 4, characterized in that: The outside of the rotating plate is rotatably connected to the threaded rod (11), and the bottom end of the stretching belt is fixedly connected to the top block (8).

6. The screw compressor rotor structure according to claim 4, characterized in that: A mounting groove is provided inside the threaded rod (11), and the rotating plate and the stretching belt are both located inside the mounting groove.

7. The screw compressor rotor structure according to claim 1, characterized in that: One side of the motor fixing frame (14) is fixedly connected to the main liquid spray pipe (4), the tops of the two blocking plates (15) form a triangular groove with an acute angle, and the four sides of the upper, lower, left and right inside the mounting plate (6) are all provided with grooves that are matched in size to the limit blocks (16).

8. The screw compressor rotor structure according to claim 1, characterized in that: One end of the extrusion rod (17) is fixedly connected to the inside of the mounting plate (6), one end of the extrusion spring (18) is fixedly connected to the blocking plate (15), and the other end of the extrusion spring (18) is fixedly connected to the inside of the mounting plate (6).

9. A screw compressor, comprising a compressor housing (1), characterized in that: A main liquid injection port (2) is provided at the top of the compressor housing (1), and auxiliary liquid injection ports (3) are provided on both sides of the main liquid injection port (2). A main liquid injection pipe (4) is clamped to the outside of the main liquid injection port (2), and auxiliary liquid injection pipes (5) are clamped to the outside of the two auxiliary liquid injection ports (3).

10. The screw compressor according to claim 9, characterized in that: The exteriors of the two auxiliary liquid spray ports (3) are not in contact with the main liquid spray port (2); the main liquid spray port (2) is located between the two auxiliary liquid spray ports (3); and the auxiliary liquid spray pipe (5) is an L-shaped structure.

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