Single-machine two-stage screw compressor

Abstract

The invention relates to the technical field of single-machine two-stage screw compressors, and discloses a single-machine two-stage screw compressor which comprises a frame, a bottom plate and a compressor body, a cooling assembly is arranged in the frame, a lubricating assembly is arranged in the compressor body, and a damping assembly is arranged at the bottom of the bottom plate. A worker starts a second motor, the second motor drives a threaded rod to rotate, through rotation of the threaded rod, a cooling fan can slide on the inner wall of a frame, heat generated in the operation process of a compressor body is sucked out, the cooling effect is achieved, meanwhile, the worker starts a water pump, the water pump can pump out cooling water in a cooling water tank and convey the cooling water into a circulating pipe, and cooling is achieved. In this way, cooling water can cool heat generated when the compressor body works, in the process, the cooling fan sucks out the heat, and cooling treatment can be conducted on the compressor body through cooperation of the cooling water and the cooling fan.

Description

Technical Field

[0001] The invention relates to the technical field of single-unit two-stage screw compressors, and in particular to a single-unit two-stage screw compressor. Background Art

[0002] In the early stages of industrial development, traditional single-stage compressors were widely used. However, as industrial production requirements for compressed gas pressure and efficiency continued to increase, single-stage compressors exposed many problems. During the compression process, single-stage compressors are limited in compression ratio and are difficult to meet the needs of some industrial processes that require higher-pressure gases, such as high-pressure chemical reactions and deep refrigeration. Moreover, single-stage compression often leads to excessively high exhaust temperatures, which not only affects the service life of the compressor, but may also cause safety hazards, such as deterioration of lubricating oil at high temperatures and aging and damage of seals.

[0003] After searching, the applicant found that a Chinese patent disclosed "a semi-enclosed single-unit two-stage screw compressor", and its publication (announcement) number is "CN104454533A". This patent mainly solves the problem of shaft seal leakage in open single-unit two-stage screw compressors by setting the control system inside the body. However, this patent cannot effectively cool down the temperature generated during the operation of the compressor. In actual use, the compressor may operate in a high temperature environment for a long time. At this time, the thermal motion of the gas molecules will intensify, reducing the compressibility of the gas, and finally leading to a decrease in compression efficiency. For this reason, we propose a single-unit two-stage screw compressor. Summary of the invention

[0004] The object of the present invention is to provide a single-machine two-stage screw compressor to solve the problem that the temperature generated during the operation of the compressor cannot be effectively cooled down as proposed in the above-mentioned background technology. In actual use, the compressor may operate in a high-temperature environment for a long time. At this time, the thermal motion of the gas molecules will intensify, reducing the compressibility of the gas, and finally leading to a decrease in compression efficiency.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a single-machine two-stage screw compressor, comprising a frame, a base plate and a compressor body, a cooling assembly is arranged inside the frame, a lubrication assembly is arranged inside the compressor body, a vibration reduction assembly is arranged at the bottom of the base plate, the cooling assembly comprises a second motor, a driven gear plate, a threaded rod, a cooling fan, a cooling water tank and a fixed block, the second motor is connected to the driving gear plate through a rotating rod, the threaded rod is connected to the fan frame through a threaded block, the cooling water tank is connected to a water pump through an input pipe, the water pump is connected to a circulation pipe and a return pipe through an output pipe, the lubrication assembly comprises an oil pump and a connecting block, the oil pump is connected to a coarse filter and a lubricating oil tank through an oil extraction pipe, the oil pump is connected to a fine filter and a long pipe through an oil delivery pipe, and the long pipe is connected to a nozzle through an oil return pipe.

[0006] As a further solution of the present invention, an air inlet pipe is provided at an upper position on the front side of the frame, and an air outlet pipe is provided at a lower position on the left side of the frame, a first motor is provided on the top of the frame, a first screw rotor is fixedly connected to the output shaft of the first motor, a second screw rotor is provided inside the compressor body and is located below the first screw rotor, and a connecting pipe is provided at a middle position between the first screw rotor and the second screw rotor.

[0007] As a further solution of the present invention, the second motor is fixedly installed on the top of the base plate, one end of the rotating rod is fixedly connected to the output shaft of the second motor, and the other end of the rotating rod is fixedly connected to the bottom of the driving gear plate, and the driving gear plate is meshed with the driven gear plate.

[0008] As a further solution of the present invention, the bottom end of the threaded rod is fixedly connected to the top of the driven gear plate, the other end of the threaded rod is rotatably connected to the front inner wall of the frame, the threaded block is threadedly connected to the outer wall of the threaded rod, the fan frame is fixedly mounted on the outer wall of the threaded block, the cooling fan is fixedly mounted inside the fan frame, a slide groove is opened on the front inner wall of the frame, and both ends of the fan frame are slidably connected to the inside of the slide groove.

[0009] As a further solution of the present invention, the cooling water tank is fixedly installed at the top rear of the base plate, one end of the input pipe is fixedly connected to the inner wall of the cooling water tank, and the other end of the input pipe is fixedly connected to the input port of the water pump. The water pump is fixedly installed on the top of the base plate and is located on the front side of the cooling water tank.

[0010] As a further solution of the present invention, one end of the output pipe is fixedly connected to the output port of the water pump, the other end of the output pipe is fixedly connected to the inner wall of the circulation pipe, one end of the return pipe is fixedly connected to the bottom inner wall of the circulation pipe, the other end of the return pipe is fixedly connected to the inner wall of the cooling water tank, the inner wall of the fixed block is fixedly connected to the outer wall of the circulation pipe, and the fixed block is fixedly installed on the inner wall of the frame.

[0011] As a further solution of the present invention, the oil pump is fixedly mounted on the top right side of the base plate, one end of the oil extraction pipe is fixedly connected to the input port of the oil extraction pump, the other end of the oil extraction pipe is fixedly connected to the inside of the coarse filter, the coarse filter is fixedly mounted on the top of the base plate and located behind the oil pump, the lubricating oil tank is fixedly mounted on the top of the base plate and located behind the coarse filter, and one end of the oil delivery pipe is fixedly connected to the output port of the oil pump.

[0012] As a further solution of the present invention, the other end of the oil delivery pipe is fixedly connected to the inside of the fine filter, the fine filter is fixedly installed on the top of the base plate and is located on the left side of the oil pump, one end of the long tube is fixedly connected to the inside of the fine filter, the other end of the long tube is fixedly connected to the inner wall of the oil return pipe, the nozzle is fixedly installed on the outer wall of the oil return pipe, the inner wall of the connecting block is fixedly connected to the outer wall of the oil return pipe, and the connecting block is fixedly installed on the inner wall of the compressor body.

[0013] As a further solution of the present invention, the vibration reduction assembly includes a slider and a bottom frame. The slider is fixedly mounted on the left and right ends of the bottom plate. Slide rails are provided on the left and right inner walls of the bottom frame. The slider is slidably connected to the inner walls of the slide rails. A hydraulic rod is fixedly connected to the inner bottom wall of the bottom frame.

[0014] As a further solution of the present invention, a spring is sleeved on the outside of the hydraulic rod, a connecting plate is fixedly connected to the top of the hydraulic rod, a rubber pad is fixedly connected to the top of the connecting plate, and the rubber pad is fixedly installed on the bottom of the base plate.

[0015] Technical effects and advantages of the present invention: Through the cooling assembly, the staff can start the second motor. Under the drive of the second motor, the threaded rod starts to rotate. As the threaded rod rotates, the cooling fan slides on the inner wall of the frame to absorb the heat generated by the compressor body during operation, thereby effectively cooling the compressor body. At the same time, the staff starts the water pump, which draws the cooling water from the cooling water tank and transports it to the circulation pipe. In this way, the cooling water can cool the heat generated by the compressor body during operation. In this process, the cooling fan absorbs the heat. The two cooperate with each other to effectively cool the compressor body. Through the lubrication components, before the compressor body starts to work, the staff can start the oil pump, and the oil pump will pump out the lubricating oil in the lubricating oil tank. The lubricating oil will then pass through two filtering procedures, the coarse filter and the fine filter. The filtered lubricating oil will be sprayed onto the outer wall of the first screw rotor and the second screw rotor through the nozzle, and then form an oil film on the outer wall of the rotor. This oil film can convert the original dry friction between metals into internal friction between molecules inside the oil film, thereby reducing friction, reducing the degree of wear on the rotor surface, and extending the service life of the rotor; Through the vibration reduction assembly, when the compressor body is running, vibration may be generated. At this time, the spring and hydraulic rod at the bottom of the base plate will expand and contract accordingly to absorb the force generated by the vibration. At the same time, the rubber pad also provides a good buffering effect for the vibration, which can reduce the damage of parts caused by vibration and thus extend the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 This is one of the schematic diagrams of the cooling assembly part of the present invention; Figure 3 This is the second schematic diagram of the cooling component part of the present invention; Figure 4 The third schematic diagram of the cooling component part of the present invention; Figure 5 It is a schematic diagram of the overall structure of the present invention; Figure 6 for Figure 5 A schematic diagram of the cross-sectional structure of; Figure 7 It is a schematic diagram of the structure of the lubrication assembly of the present invention; Figure 8 This is one of the partial structural schematic diagrams of the lubrication component of the present invention; Fig. 9 It is a schematic diagram of the structure of the vibration reduction assembly of the present invention; Fig.10 This is one of the partial structural schematic diagrams of the vibration reduction assembly of the present invention.

[0017] In the figure: 1, frame; 2, air inlet pipe; 3, air outlet pipe; 4, first motor; 5, first screw rotor; 6, second screw rotor; 7, connecting pipe; 11, bottom plate; 12, compressor body; 8, cooling assembly; 801, second motor; 802, rotating rod; 803, driving gear plate; 804, driven gear plate; 805, threaded rod; 806, threaded block; 807, fan frame; 808, cooling fan; 809, chute; 810, cooling water tank; 811, input pipe; 812, water pump; 813, output Pipe; 814, circulation pipe; 815, return pipe; 816, fixed block; 9, lubrication assembly; 901, oil pump; 902, oil extraction pipe; 903, coarse filter; 904, lubricating oil tank; 905, oil delivery pipe; 906, fine filter; 907, long pipe; 908, return oil pipe; 909, nozzle; 910, connecting block; 10, vibration reduction assembly; 1001, slider; 1002, bottom frame; 1003, slide rail; 1004, hydraulic rod; 1005, spring; 1006, connecting plate; 1007, rubber pad. DETAILED DESCRIPTION

[0018] 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. Example

[0019] Please see attached Figure 1 - Attachment Figure 5A single-unit two-stage screw compressor, a frame 1, a bottom plate 11 and a compressor body 12, a cooling assembly 8 is arranged inside the frame 1, and the cooling assembly 8 includes a second motor 801, a driven gear plate 804, a threaded rod 805, a cooling fan 808, a cooling water tank 810 and a fixed block 816, the second motor 801 is connected to the driving gear plate 803 through a rotating rod 802, the threaded rod 805 is connected to the fan frame 807 through a threaded block 806, the cooling water tank 810 is connected to a water pump 812 through an input pipe 811, and the water pump 812 is connected to a circulation pipe 814 and a return pipe 815 through an output pipe 813, and the front of the frame 1 An air inlet pipe 2 is provided at the upper position, and an air outlet pipe 3 is provided at the lower position on the left side of the frame 1, a first motor 4 is provided at the top of the frame 1, a first screw rotor 5 is fixedly connected to the output shaft of the first motor 4, a second screw rotor 6 is provided inside the compressor body 12 and is located below the first screw rotor 5, a connecting pipe 7 is provided at the middle position between the first screw rotor 5 and the second screw rotor 6, a second motor 801 is fixedly installed on the top of the bottom plate 11, one end of the rotating rod 802 is fixedly connected to the output shaft of the second motor 801, and the other end of the rotating rod 802 is fixedly connected to the bottom of the driving gear plate 803, the driving gear plate 803 is meshed with the driven gear plate 804, the bottom end of the threaded rod 805 is fixedly connected to the top of the driven gear plate 804, the other end of the threaded rod 805 is rotatably connected to the front inner wall of the frame 1, the threaded block 806 is threadedly connected to the outer wall of the threaded rod 805, the fan frame 807 is fixedly installed on the outer wall of the threaded block 806, the cooling fan 808 is fixedly installed inside the fan frame 807, a slide groove 809 is opened on the front inner wall of the frame 1, and the two ends of the fan frame 807 are slidably connected to the inside of the slide groove 809, the cooling water tank 810 is fixedly installed at the top and rear of the bottom plate 11, and one end of the input pipe 811 is fixedly connected to the cooling water tank 810. The inner wall of the cooling water tank 810, the other end of the input pipe 811 is fixedly connected to the input port of the water pump 812, the water pump 812 is fixedly installed on the top of the base plate 11 and is located on the front side of the cooling water tank 810, one end of the output pipe 813 is fixedly connected to the output port of the water pump 812, the other end of the output pipe 813 is fixedly connected to the inner wall of the circulation pipe 814, one end of the return pipe 815 is fixedly connected to the bottom inner wall of the circulation pipe 814, the other end of the return pipe 815 is fixedly connected to the inner wall of the cooling water tank 810, the inner wall of the fixed block 816 is fixedly connected to the outer wall of the circulation pipe 814, and the fixed block 816 is fixedly installed on the inner wall of the frame 1.

[0020] One end of the air inlet pipe 2 and the air outlet pipe 3 both extend to the interior of the compressor body 12. Both ends of the fan frame 807 are fixedly connected with adapter blocks that can be slidably connected to the slide groove 809. The adapter block can move up and down on the inner wall of the slide groove 809. When the adapter block slides to the bottom of the slide groove 809, the fan frame 807 is located above the driven gear plate 804. Similarly, when the adapter block slides to the top of the slide groove 809, the fan frame 807 is just located at the top of the threaded rod 805 and cannot move up any further. The top of the fan frame 807 is in contact with the top wall of the front inner wall of the frame 1. The bottom of the return pipe 815 is fixedly connected to the support block. The support block is fixedly installed on the top of the base plate 11 and is located on the left side of the water pump 812, thereby supporting the return pipe 815.

[0021] Specifically, through the cooling component 8, the staff can start the second motor 801. Under the drive of the second motor 801, the threaded rod 805 starts to rotate. Then, with the rotation of the threaded rod 805, the cooling fan 808 will slide on the inner wall of the frame 1 to suck out the hot air generated by the compressor body 12 during operation, thereby effectively cooling the air. At the same time, the staff starts the water pump 812, and the water pump 812 will pump out the cooling water in the cooling water tank 810 and transport it to the circulation pipe 814, so that the cooling water can cool the hot air generated by the compressor body 12 when it is working. In this process, the cooling fan 808 absorbs the heat, and the two cooperate with each other to effectively cool the compressor body 12. Example

[0022] Please see attached Figure 1 , Attachment Figure 7 And attached Figure 8, and on the basis of the first embodiment, it is further obtained that a lubrication assembly 9 is arranged inside the compressor body 12, and the lubrication assembly 9 includes an oil pump 901 and a connecting block 910. The oil pump 901 is connected to a coarse filter 903 and a lubricating oil tank 904 through an oil extraction pipe 902, and the oil pump 901 is connected to a fine filter 906 and a long pipe 907 through an oil delivery pipe 905. The long pipe 907 is connected to a nozzle 909 through an oil return pipe 908. The oil pump 901 is fixedly installed on the top right side of the bottom plate 11, one end of the oil extraction pipe 902 is fixedly connected to the input port of the oil extraction pump 901, and the other end of the oil extraction pipe 902 is fixedly connected to the inside of the coarse filter 903. The coarse filter 903 is fixedly installed on the top of the bottom plate 11 and is located at the oil Behind the pump 901, the lubricating oil tank 904 is fixedly mounted on the top of the base plate 11 and is located behind the coarse filter 903, one end of the oil pipe 905 is fixedly connected to the output port of the oil pump 901, and the other end of the oil pipe 905 is fixedly connected to the inside of the fine filter 906, the fine filter 906 is fixedly mounted on the top of the base plate 11 and is located on the left side of the oil pump 901, one end of the long tube 907 is fixedly connected to the inside of the fine filter 906, and the other end of the long tube 907 is fixedly connected to the inner wall of the return oil pipe 908, the nozzle 909 is fixedly mounted on the outer wall of the return oil pipe 908, the inner wall of the connecting block 910 is fixedly connected to the outer wall of the return oil pipe 908, and the connecting block 910 is fixedly mounted on the inner wall of the compressor body 12.

[0023] A conduit is fixedly connected between the coarse filter 903 and the lubricating oil tank 904, and four groups of nozzles 909 are provided. The four groups of nozzles 909 are precisely aimed at the first screw rotor 5 and the second screw rotor 6, so that the lubricating oil can be accurately sprayed thereon.

[0024] Specifically, by setting up the lubrication component 9, before the compressor body 12 starts to operate, the staff can start the oil pump 901, and the oil pump 901 will pump out the lubricating oil in the lubricating oil tank 904. The lubricating oil will then pass through two filtering procedures, namely the coarse filter 903 and the fine filter 906. The filtered lubricating oil will be sprayed onto the outer walls of the first screw rotor 5 and the second screw rotor 6 through the nozzle 909, thereby forming an oil film on the outer wall of the rotor. This oil film can convert the original dry friction between metals into internal friction between molecules inside the oil film, thereby reducing friction, reducing the degree of wear on the rotor surface, and extending the service life of the rotor. Example

[0025] Please see attached Figure 1 , Attachment Fig. 9 And attached Fig.10, and on the basis of the second embodiment, it is further obtained that a vibration reduction assembly 10 is provided at the bottom of the bottom plate 11, and the vibration reduction assembly 10 includes a slider 1001 and a bottom frame 1002, the slider 1001 is fixedly installed on the left and right ends of the bottom plate 11, and slide rails 1003 are provided on the inner walls of the left and right sides of the bottom frame 1002, the slider 1001 is slidably connected to the inner wall of the slide rail 1003, and a hydraulic rod 1004 is fixedly connected to the inner bottom wall of the bottom frame 1002, and a spring 1005 is sleeved on the outside of the hydraulic rod 1004, and a connecting plate 1006 is fixedly connected to the top of the connecting plate 1006, and a rubber pad 1007 is fixedly connected to the bottom of the bottom plate 11.

[0026] One end of the spring 1005 is fixedly connected to the bottom of the connecting plate 1006, and the four bottom corners of the bottom frame 1002 are fixedly connected to a set of supporting bases, providing a stable supporting structure for the entire device to ensure its stability during operation.

[0027] Specifically, by setting up the vibration reduction assembly 10, when the compressor body 12 is running, vibration may be generated. At this time, the spring 1005 and the hydraulic rod 1004 located at the bottom of the base plate 11 will expand and contract accordingly to absorb the force generated by the vibration. At the same time, the rubber pad 1007 also provides a good buffering effect for the vibration, which can reduce the damage of parts caused by vibration and thus extend the service life of the equipment.

[0028] Working principle of the present invention: The present invention is a single-machine two-stage screw compressor. First, before the compressor body 12 is started, the staff can start the oil pump 901. The oil pump 901 will extract the lubricating oil in the lubricating oil tank 904 through the conduit. The extracted lubricating oil is first filtered by the coarse filter 903 and then enters the oil extraction pipe 902. Then the lubricating oil is transported to the fine filter 906 through the oil delivery pipe 905. Then the lubricating oil is sent to the return oil pipe 908 and the nozzle 909 through the long pipe 907. Finally, the lubricating oil is sprayed onto the surface of the first screw rotor 5 and the second screw rotor 6 through the nozzle 909. Secondly, when the compressor body 12 is running, heat is generated inside it. At this time, the staff can start the water pump 812. The water pump 812 extracts the cooling water in the cooling water tank 810 through the input pipe 811, and then transports the cooling water to the circulation pipe 814 through the output pipe 813. Then, the cooling water is returned to the cooling water tank 810 through the return pipe 815, thereby realizing the circulation of cooling water. , the circulation pipe 814 is located inside the frame 1 and outside the compressor body 12, and can cool down the heat generated during the operation of the compressor body 12. At the same time, the staff starts the second motor 801, and the second motor 801 drives the rotating rod 802 to rotate, and the rotating rod 802 drives the active gear plate 803 to rotate, and the active gear plate 803 drives the driven gear plate 804 to rotate, and the driven gear plate 804 drives the threaded rod 805 to rotate, so that the threaded block 806 moves up and down on the outer wall of the threaded rod 805, and drives the cooling fan 808 in the fan frame 807 to move up and down synchronously, and the hot air is dissipated by the cooling fan 808. Finally, during the operation of the compressor body 12, vibration may occur. Under the action of the vibration force, the slider 1001 will slide in the slide rail 1003, and the spring 1005 and the hydraulic rod 1004 will also move downward. After absorbing the vibration force, they will drive the bottom plate 11 to return to the initial position, thereby playing a role in vibration reduction and buffering.

[0029] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A single-unit two-stage screw compressor, comprising a frame (1), a base plate (11) and a compressor body (12), characterized in that: A cooling assembly (8) is disposed inside the frame (1), a lubrication assembly (9) is disposed inside the compressor body (12), and a vibration reduction assembly (10) is disposed at the bottom of the base plate (11); The cooling assembly (8) comprises a second motor (801), a driven gear plate (804), a threaded rod (805), a cooling fan (808), a cooling water tank (810) and a fixed block (816); the second motor (801) is connected to the driving gear plate (803) via a rotating rod (802); the threaded rod (805) is connected to the fan frame (807) via a threaded block (806); the cooling water tank (810) is connected to a water pump (812) via an input pipe (811); the water pump (812) is connected to a circulation pipe (814) and a return pipe (815) via an output pipe (813); The lubrication assembly (9) comprises an oil pump (901) and a connection block (910); the oil pump (901) is connected to a coarse filter (903) and a lubricating oil tank (904) via an oil extraction pipe (902); the oil pump (901) is connected to a fine filter (906) and a long pipe (907) via an oil delivery pipe (905); and the long pipe (907) is connected to a nozzle (909) via an oil return pipe (908).

2. A single-unit two-stage screw compressor according to claim 1, characterized in that: An air inlet pipe (2) is arranged at an upper position on the front side of the frame (1), and an air outlet pipe (3) is arranged at a lower position on the left side of the frame (1); a first motor (4) is arranged at the top of the frame (1); a first screw rotor (5) is fixedly connected to an output shaft of the first motor (4); a second screw rotor (6) is arranged inside the compressor body (12) and is located below the first screw rotor (5); and a connecting pipe (7) is arranged at a middle position between the first screw rotor (5) and the second screw rotor (6).

3. A single-unit two-stage screw compressor according to claim 2, characterized in that: The second motor (801) is fixedly mounted on the top of the bottom plate (11); one end of the rotating rod (802) is fixedly connected to the output shaft of the second motor (801); the other end of the rotating rod (802) is fixedly connected to the bottom of the driving gear plate (803); and the driving gear plate (803) is meshingly connected to the driven gear plate (804).

4. A single-unit two-stage screw compressor according to claim 3, characterized in that: The bottom end of the threaded rod (805) is fixedly connected to the top of the driven gear plate (804), the other end of the threaded rod (805) is rotatably connected to the front inner wall of the frame (1), the threaded block (806) is threadedly connected to the outer wall of the threaded rod (805), the fan frame (807) is fixedly installed on the outer wall of the threaded block (806), the cooling fan (808) is fixedly installed inside the fan frame (807), a slide groove (809) is opened on the front inner wall of the frame (1), and the two ends of the fan frame (807) are slidably connected to the inside of the slide groove (809).

5. A single-unit two-stage screw compressor according to claim 4, characterized in that: The cooling water tank (810) is fixedly mounted at the top rear of the base plate (11); one end of the input pipe (811) is fixedly connected to the inner wall of the cooling water tank (810); the other end of the input pipe (811) is fixedly connected to the input port of a water pump (812); and the water pump (812) is fixedly mounted on the top of the base plate (11) and is located at the front side of the cooling water tank (810).

6. A single-unit two-stage screw compressor according to claim 1, characterized in that: One end of the output pipe (813) is fixedly connected to the output port of the water pump (812), the other end of the output pipe (813) is fixedly connected to the inner wall of the circulation pipe (814), one end of the return pipe (815) is fixedly connected to the bottom inner wall of the circulation pipe (814), the other end of the return pipe (815) is fixedly connected to the inner wall of the cooling water tank (810), the inner wall of the fixed block (816) is fixedly connected to the outer wall of the circulation pipe (814), and the fixed block (816) is fixedly mounted on the inner wall of the frame (1).

7. A single-unit two-stage screw compressor according to claim 1, characterized in that: The oil pump (901) is fixedly mounted on the top of the base plate (11) on the right side, one end of the oil extraction pipe (902) is fixedly connected to the input port of the oil extraction pump (901), the other end of the oil extraction pipe (902) is fixedly connected to the inside of the coarse filter (903), the coarse filter (903) is fixedly mounted on the top of the base plate (11) and is located behind the oil pump (901), the lubricating oil tank (904) is fixedly mounted on the top of the base plate (11) and is located behind the coarse filter (903), and one end of the oil delivery pipe (905) is fixedly connected to the output port of the oil pump (901).

8. The single-unit two-stage screw compressor according to claim 1, characterized in that: The other end of the oil delivery pipe (905) is fixedly connected to the inside of the fine filter (906); the fine filter (906) is fixedly mounted on the top of the base plate (11) and is located on the left side of the oil pump (901); one end of the long tube (907) is fixedly connected to the inside of the fine filter (906); the other end of the long tube (907) is fixedly connected to the inner wall of the oil return pipe (908); the nozzle (909) is fixedly mounted on the outer wall of the oil return pipe (908); the inner wall of the connecting block (910) is fixedly connected to the outer wall of the oil return pipe (908); and the connecting block (910) is fixedly mounted on the inner wall of the compressor body (12).

9. A single-unit two-stage screw compressor according to claim 1, characterized in that: The vibration reduction assembly (10) comprises a slider (1001) and a bottom frame (1002), wherein the slider (1001) is fixedly mounted on the left and right ends of the bottom plate (11), and slide rails (1003) are provided on the left and right inner walls of the bottom frame (1002), and the slider (1001) is slidably connected to the inner walls of the slide rails (1003), and a hydraulic rod (1004) is fixedly connected to the inner bottom wall of the bottom frame (1002).

10. A single-unit two-stage screw compressor according to claim 9, characterized in that: The outer sleeve of the hydraulic rod (1004) is provided with a spring (1005), the top of the hydraulic rod (1004) is fixedly connected to a connecting plate (1006), the top of the connecting plate (1006) is fixedly connected to a rubber pad (1007), and the rubber pad (1007) is fixedly installed on the bottom of the base plate (11).

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