An air cushion rod compressor with an oil tank under the air cushion rod

Abstract

The application relates to the technical field of air compressors and discloses an oil storage tank under-type air buffer rod compressor, which comprises a rotor shell and a driving structure arranged at one side of the rotor shell, the rotor shell is provided with an oil blocking and collecting lubricating assembly, the oil blocking and collecting lubricating assembly comprises an annular stepped oil blocking weir, the annular stepped oil blocking weir is matched with an inclined oil guiding support, three-layer step stratified mist capturing is completed to realize middle section pre-separation, the load of an oil storage tank filter core is reduced, the overflow groove is matched to adaptively control oil, oil-gas separation and bearing lubrication are synchronously realized; an oil outlet coil spring type one-way opening and closing assembly can seal oil under normal conditions to prolong oil mist condensation time, stop oil mist backflow during shutdown, and avoid oil injection and carbon deposition during startup; a bottom conical flow guide head is arranged in front of a large oil droplet interception, buffer and dispersion straight oil gas, the oil storage tank is provided with a fixed structure, the oil storage tank body can be quickly disassembled and assembled, and subsequent maintenance is facilitated.

Description

Technical Field

[0001] This invention relates to the field of air compressor technology, specifically to a bottom-mounted oil tank type air retarder compressor. Background Technology

[0002] Air retarder compressors, also known as screw compressors, generate a large amount of oil-gas mixture during operation when the rotor meshes and compresses air. To achieve rapid oil-gas recovery and simplify the overall layout, most designs adopt a bottom-mounted oil tank layout, placing the oil tank directly below the dual-rotor chamber. The oil-gas mixture generated during compression can be vertically transported downwards to the oil tank by its own gravity to complete oil-gas separation, thereby reducing the horizontal space occupied by the equipment and facilitating unit integration and pipeline layout.

[0003] Conventional bottom-mounted screw compressors for oil storage tanks do not have a pre-installed oil-gas separation component in the communication channel between the rotor cavity and the oil storage tank. The high-speed oil-gas mixture discharged from the rotor cavity directly impacts the bottom of the impact cavity. Large-diameter oil droplets carried in the airflow are easily splashed into oil mist after impact and re-mixed into the airflow. The untreated oil-gas mixture directly enters the lower oil storage tank, causing the coarse separation component in the tank to bear a large amount of oil-gas processing. Under long-term operation, this can easily aggravate the oil mist adsorption burden on the separation filter element. Therefore, a bottom-mounted air retarder compressor for oil storage tanks is proposed. Summary of the Invention

[0004] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides a bottom-mounted oil storage tank air retarder compressor, which has the advantages of oil-gas pre-separation and improved overall oil-gas separation efficiency, solving the problem of all oil mist directly entering the oil storage tank, causing a large load on the separation components inside the tank.

[0005] (II) Technical Solution To achieve the above objectives, the present invention provides the following technical solution: a bottom-mounted oil storage tank type air retarder compressor, comprising a rotor housing and a drive structure disposed on one side thereof, wherein the rotor housing is provided with an oil baffle and oil collection lubrication assembly, the oil baffle and oil collection lubrication assembly comprising: The annular stepped oil weir can achieve pre-separation of oil and gas. It has at least four inclined oil return grooves on both sides, and the annular stepped oil weir is provided with a support plate on the outside to provide installation conditions. The annular stepped oil weir has a through hole in the center for the oil-gas mixture to pass through. When the equipment is running, the compressed oil-gas mixture passes vertically downward through the central through hole of the annular stepped oil-retaining weir. After the oil and gas collide with the oil surface in the oil storage tank, the airflow is turned upward and flows back to the multi-layered annular steps of the oil-retaining weir, causing the oil mist to adhere to the surface of the steps and converge to form oil, thus completing the pre-separation of oil and gas. At least four inclined oil guide brackets are set on both sides of the annular stepped oil baffle, and the end of the inclined oil return groove away from the annular stepped oil baffle extends into the inclined oil guide bracket. The large-diameter oil droplets separated and precipitated are collected in the inclined return oil groove. Under the action of pressure difference in the cavity, they are transported to the rotor bearing seat through the inclined oil guide bracket to lubricate the rotor bearing.

[0006] Preferably, the inner walls on both sides of the inclined oil return groove are provided with overflow grooves, and the two sides of the inclined oil return groove are provided with oil storage boxes.

[0007] Preferably, the inner wall of the overflow trough and the side wall of the oil storage box are provided with oil outlet holes. When the oil-gas separation volume increases and the oil level in the inclined return oil trough continues to overflow the height of the overflow trough, the excess lubricating oil will overflow from the oil outlet holes, avoiding excessive oil from flowing into the inclined oil guide bracket and causing excessive bearing oil supply.

[0008] Preferably, the annular stepped oil weir is composed of an inner annular step, a middle annular step, and an outer annular step arranged coaxially, with each annular step arranged in a stepped manner from the inside to the outside along the radial direction.

[0009] Preferably, the inner ring annular step, the middle ring annular step, and the outer ring annular step of the annular step oil weir are each provided with at least two oil outlets on their outer walls. The oil mist carried by the returning airflow adheres to the inner, middle, and outer ring-shaped stepped surfaces, continuously accumulating oil. Under the influence of gravity, the oil flows from the inside out and gradually converges into the inclined return oil trough.

[0010] Preferably, both the inner annular step and the middle annular step have a one-way opening and closing assembly on the outer side of their oil outlets, the one-way opening and closing assembly comprising: An oil baffle plate is movably positioned on one side of the oil outlet to control the flow of oil. At least two mounting plates are fixedly installed on the outer wall of the annular stepped oil baffle and distributed on one side of the oil baffle plate.

[0011] Preferably, at least two rotating frames are fixedly provided on one side of the oil baffle, and each of the two mounting plates is provided with a coil spring for resetting the oil baffle. The rotating frames and the mounting plates are movably connected, and the inner ring of the coil spring is fixedly sleeved on the rotating frames.

[0012] Preferably, when the oil accumulation reaches a certain level and the oil pressure is sufficient to overcome the preload of the coil spring, the oil pushes the oil baffle outward, causing the oil baffle and the annular stepped oil baffle to separate, allowing the lubricating oil accumulated in the step to flow outward from the opened channel and flow into the inclined return oil groove.

[0013] Preferably, a conical guide head is suspended at the bottom of the annular stepped oil-blocking weir, and a ventilation gap is formed between the conical guide head and the annular stepped oil-blocking weir. The tapered guide head has its large end facing upwards and its cone tip facing downwards. The outer diameter of the bottom of the large end is larger than the inner diameter of the through hole, and the bottom surface of the large end is directly opposite the through hole above. Oil and gas flow downwards from the through-hole directly onto the large end of the conical guide head, where they are rapidly dispersed and diverted outwards by the conical surface. The oil mist adheres to the conical wall due to inertia, accumulating into oil and flowing down the conical surface into the oil storage tank. The airflow passes through the gap between the conical guide head and the annular stepped oil weir and turns upwards, entering the annular stepped layer for separation. This significantly reduces the amount of oil mist entering the annular stepped oil weir and lowers the separation load of the annular stepped oil weir.

[0014] Preferably, the top of the mounting frame is fixedly provided with two sets of fixing structures for quick assembly and disassembly of the oil storage tank body. The fixing structure includes a fixing box and a connecting bracket. The connecting bracket is fixedly connected to the oil storage tank body. A locking frame is movably provided on one side of the inner wall of the fixing box. A spring is provided on one side of the locking frame to reset it. A locking block is fixedly provided on one side of the connecting bracket. A top rod is movably provided on one side of the fixing box. The locking end of the lock frame and the side of the locking block that are close to each other are provided with parallel inclined surfaces.

[0015] (III) Beneficial Effects Compared with the prior art, the present invention provides a bottom-mounted oil storage tank type air retarder compressor, which has the following beneficial effects: 1. This bottom-mounted air retarder compressor, through the combined use of annular stepped oil weirs and inclined oil guide supports, uses three layers of annular steps (higher inside, lower outside) to capture oil mist at each stage, completing mid-stage pre-separation and significantly reducing the total amount of oil mist entering the oil tank, thus reducing the adsorption load on the filter element. At the same time, the inclined oil return groove, equipped with an overflow groove, adaptively regulates the oil volume, stably delivering lubricating oil to the rotor bearing seat through the inclined oil guide supports, simultaneously achieving oil-gas pre-separation and automatic bearing lubrication. 2. This air retarder compressor with a bottom-mounted oil tank, through the setting of a one-way opening and closing component, normally seals the oil outlet channel with an oil baffle plate, prolonging the adsorption and condensation time of oil mist on the stepped wall surface, and further improving the oil-gas separation efficiency; after shutdown, the coil spring drives the oil baffle plate to automatically close the oil circuit, completely preventing the oil and oil mist in the oil tank from flowing back into the rotor cavity, and completely avoiding the failure of unit restarting oil injection and rotor oil and carbon buildup; 3. This bottom-mounted air retarder compressor, through the setting of the conical guide head, can intercept most of the large oil droplets in the airflow in advance, significantly reducing the total amount of oil mist entering the annular step and reducing the separation load of the annular step oil weir; at the same time, it disperses and buffers the vertically rushing high-pressure oil and gas, avoiding the oil and gas from impacting the oil surface inside the oil tank at high speed and generating a large amount of splashing secondary oil mist, reducing the generation of fine oil mist from the source, and further improving the overall oil and gas separation effect of the whole machine; 4. This bottom-mounted air retarder compressor for oil storage tanks, through the setting of a fixed structure, allows the locking frame to be separated from the clamping block by operating the top rod, thus completing the quick disassembly of the oil storage tank body and facilitating subsequent maintenance; In summary, this invention utilizes a combination of annular stepped oil weir and inclined oil guide bracket to achieve mid-stage pre-separation through three-layer stepped mist capture, reducing the load on the oil tank filter element. Combined with adaptive oil control via an overflow trough, it simultaneously achieves oil-gas separation and bearing lubrication. The spring-loaded one-way opening and closing component at the oil outlet can seal the oil under normal conditions, extending the oil mist condensation time, preventing backflow of oil mist during shutdown, and avoiding carbon buildup from oil spraying during startup. The bottom conical guide head intercepts large oil droplets and buffers and disperses direct-flowing oil and gas, reducing secondary oil mist splashing inside the tank. This graded separation significantly improves the overall oil-gas purification effect. Furthermore, the fixed structure allows for quick disassembly and assembly of the oil tank body, facilitating subsequent maintenance. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0017] Figure 2 This is a three-dimensional structural diagram of the compression power assembly in this invention.

[0018] Figure 3 This is a first-view orthographic structural diagram of the compression powertrain in this invention.

[0019] Figure 4 This is a second-view orthographic structural diagram of the compression powertrain in this invention.

[0020] Figure 5 This is a schematic diagram of the front section structure of the annular stepped oil-retaining weir in this invention.

[0021] Figure 6 for Figure 4 Enlarged diagram of point A in the diagram.

[0022] Figure 7 This is a schematic diagram of the combination of the inclined oil guide bracket and the inclined oil return groove in this invention.

[0023] Figure 8 This is a three-dimensional structural diagram of the inclined oil guide bracket in this invention.

[0024] Figure 9This is an exploded view of the unidirectional opening and closing component in this invention.

[0025] Figure 10 This is an exploded view of the fixed structure in this invention.

[0026] In the picture: 1. Installation frame; 11. Oil storage tank body; 2. Compression powertrain; 21. Rotor housing; 22. Drive structure; 3. Annular stepped oil weir; 31. Oil outlet; 32. Inclined return oil trough; 33. Oil reservoir; 4. Inclined oil guide bracket; 5. One-way opening and closing assembly; 51. Oil baffle; 52. Seal; 53. Rotating frame; 54. Mounting plate; 55. Coil spring; 6. Conical guide head; 7. Fixed structure; 71. Fixed box; 72. Hinge seat; 73. Locking frame; 74. Spring; 75. Connecting bracket; 76. Locking block; 77. Top rod. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] In the description of this invention, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0029] In addition, a fixed connection refers to a connection in which parts or components are fixed and there is no relative movement; a transmission connection refers to a connection in which mechanical motion or torque is transmitted to other working parts through a transmission component; a sliding connection refers to a connection in which two objects are in contact but not fixed and can slide relative to each other; and a rotational connection refers to a connection in which two objects are in contact but not fixed and can rotate relative to each other.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0031] Example: This embodiment provides a bottom-mounted air retarder compressor for an oil storage tank body 11, which has the following technical features.

[0032] Please see Figure 1-10 This invention discloses a bottom-mounted oil tank air retarder compressor, comprising a mounting frame 1 and a compression power assembly 2. An oil tank body 11 is fixedly mounted inside the mounting frame 1. The compression power assembly 2 includes a rotor housing 21, a drive structure 22, and an oil baffle, oil collector, and lubrication assembly built into the rotor housing 21. The oil tank body 11 is hoisted and positioned directly below the rotor housing 21. The drive structure 22 is a drive motor, and the motor output shaft is rigidly connected to male and female rotors inside the rotor housing 21 via a coupling for rotor meshing compression. Air provides continuous power; an annular support plate is provided in the middle of the inner cavity of the rotor housing 21, and an annular stepped oil baffle 3 is fixed to the annular support plate by bolts. The annular stepped oil baffle 3 separates the upper rotor compression chamber from the lower oil storage tank body 11 chamber. The oil-gas mixture can flow up and down only by the through hole opened in the center of the annular stepped oil baffle 3; the oil baffle and oil collection lubrication assembly is used for oil-gas pre-separation and automatic oil supply to the rotor bearing, and mainly includes an annular stepped oil baffle 3, an inclined oil guide bracket 4, a one-way opening and closing assembly 5, and a conical guide head 6.

[0033] The drive structure 22 is fixed to the left end face of the rotor housing 21 by a flange seal. The motor output shaft extends through the side wall of the housing and into the interior to connect with the male and female rotors. A large-diameter through channel is opened at the bottom of the rotor housing 21, which is directly connected to the inner cavity of the oil storage tank body 11 below. The annular support plate in the middle of the housing provides a stable installation reference for the annular stepped oil weir 3 and forms an axial limiting support for the oil weir.

[0034] After the equipment is started, the drive structure 22 drives the male and female rotors inside the housing to mesh and compress the air. During the compression process, the lubricating oil injected into the cavity is atomized by the impact of the high-speed airflow, forming a high-concentration oil-gas mixture. Under the dual action of the internal pressure of the rotor cavity and the gravity of the oil and gas itself, the oil-gas mixture flows vertically downward and precisely rushes towards the central through hole of the annular stepped oil baffle 3. The annular support plate separates the upper and lower independent chambers, forcing all the oil-gas mixture to pass through the annular stepped oil baffle 3 to complete multi-stage pre-separation, preventing the oil and gas from short-circuiting through the gaps in the side walls of the cavity and rushing directly into the oil storage tank body 11, thus ensuring the overall oil-gas separation efficiency from a structural perspective.

[0035] The annular stepped oil baffle 3 is an integral annular disc structure with a through hole at the center of the disc, allowing the oil-gas mixture discharged from the rotor cavity to pass vertically downwards. The annular stepped oil baffle 3 is integrally formed by three sets of coaxial and concentrically arranged inner annular steps, middle annular steps, and outer annular steps. The three layers of annular steps present a stepped drop shape that gradually decreases from the inside to the outside in the radial direction. Several long strip-shaped oil outlets 31 are evenly opened circumferentially on the outer vertical wall of the inner annular steps, middle annular steps, and outer annular steps. Each oil outlet 31 of the inner and middle annular steps is equipped with a one-way opening and closing component 5 on its outer side. The oil outlet 31 of the outer annular steps has no obstruction or sealing structure. The outer edge of the annular stepped oil baffle 3 has four inclined oil return grooves 32 distributed circumferentially, and the four inclined oil return grooves 32 are respectively matched with four inclined oil guide supports 4.

[0036] Under compressor operating conditions, the low-pressure airflow, after being dispersed and coarsely separated by the conical guide head 6, veers upwards and passes through three annular steps: the inner ring, the middle ring, and the outer ring. Fine oil mist carried within the airflow continuously impacts and adheres to the vertical sidewalls of the steps, accumulating and condensing to form liquid lubricating oil. Due to the radial slope of the three steps (higher inside, lower outside), the liquid lubricating oil flows slowly from the higher inner diameter region to the lower outer ring region under its own gravity, eventually converging entirely into the inclined return oil groove 32 around the oil weir. The stepped structure significantly extends the contact and residence path between the oil-gas mixture and the stepped wall, enabling the layered capture of oil mist particles of different sizes (large, medium, and fine) to complete the core oil-gas pre-separation process in the middle section of the machine. This process intercepts the vast majority of lubricating oil in advance, greatly reducing the long-term oil mist adsorption load on the fine separation filter element inside the oil storage tank 11. Multiple sets of inclined oil return grooves 32, evenly arranged along the circumference, can simultaneously and uniformly collect the lubricating oil separated and precipitated in the entire circumference, forming a stable centralized flow channel to continuously supply lubricating medium to the bearings at both ends of the rotor. Each inclined oil return groove 32 is a through-groove structure extending obliquely downwards along the outer ring of the oil baffle. The left and right side walls of the inclined oil return groove 32 are provided with overflow stepped overflow grooves, and the outer side wall of the inclined oil return groove 32 is fitted with an oil storage box 33. The inner wall of the overflow groove and the side wall of the oil storage box 33 are both provided with interconnected oil outlet holes. The end channel of the inclined oil return groove 32, away from the annular stepped oil baffle 3, is sealed and connected to the oil inlet of the inclined oil guide bracket 4. When the compressor is operating at its normal rated load, all the lubricating oil precipitated from the three annular steps is temporarily stored inside the inclined oil return groove 32. The oil continuously flows along the inclined groove into the inclined oil guide bracket 4, and is directionally transported to the rotor bearing to complete the lubrication operation. When the equipment operates continuously at full load or overload, the flow rate of the oil-gas mixture increases significantly. The total amount of lubricating oil released from the annular stepped flow increases sharply, and the oil level inside the inclined return oil tank 32 continues to rise. Once the oil level exceeds the height of the top surface of the overflow tank, the excess lubricating oil will automatically flow into the overflow tanks on both sides, and then flow into the matching oil storage box 33 through the connecting oil outlet. Finally, it will be discharged downward along the oil outlet on the side wall of the oil storage box 33, dripping onto the surface of the lower annular support plate and then flowing into the oil storage tank body 11. This liquid level adaptive diversion structure only activates diversion when the lubricating oil volume is overloaded. Under normal operating conditions, all separated oil is delivered to the bearing, avoiding a large amount of lubricating oil from flooding into the inclined oil guide bracket 4 at one time. This effectively prevents the rotor bearing from exceeding the oil supply limit, eliminates lubricating oil leakage at both ends of the bearing, oil leakage at the rotor meshing point, bearing overheating and seizure, and realizes automatic dynamic control of the oil supply in the lubrication circuit.

[0037] The inclined oil guide bracket 4 is a hollow, long, inclined pipeline component. Four inclined oil guide brackets 4 are distributed circumferentially along the annular stepped oil baffle 3. The upper oil inlet of the inclined oil guide bracket 4 is sealed and inserted into the end of the inclined oil return groove 32. The end away from the inclined oil return groove 32 extends into the oil storage chamber of the bearing seats at both ends of the male and female rotors. When the compressor is working, a negative pressure difference is continuously formed inside the rotor housing 21. Under the continuous traction of the negative pressure in the inclined oil return groove 32, the lubricating oil in the inclined oil return groove 32 is unidirectionally and stably transported to the rotor bearing seat along the inclined oil guide bracket 4, continuously circulating lubrication and cooling the high-speed rotating rotor bearing, carrying away the heat generated by bearing friction, reducing the wear of the rolling pair, and significantly extending the service life of the bearing. The overall inclined arrangement of the bracket can also prevent the lubricating oil in the oil storage groove from flowing back to the annular stepped oil baffle 3 after the unit is stopped, ensuring that the bearing can quickly establish an oil film every time it is started.

[0038] Each oil outlet 31 of the inner ring step and the middle ring step is independently equipped with a one-way opening and closing assembly 5. Each one-way opening and closing assembly 5 includes an oil baffle 51, two sets of mounting plates 54 symmetrically fixed to the outer wall of the oil baffle, and a rotating frame 53 fixedly connected to the side of the oil baffle 51. The inner surface of the oil baffle 51 is bonded with an elastic seal 52 to improve the sealing effect in the closed state. The rotating frame 53 is hinged between the two mounting plates 54. The interior of each mounting plate 54 is embedded with a coil spring 55. The inner ring of the coil spring 55 is fixedly sleeved on the outer circumference of the rotating frame 53, and the return pull is provided by the pre-tightening elasticity of the coil spring 55 itself. Under normal shutdown or low oil pressure conditions, the preload of the coil spring 55 pulls the oil baffle 51 to press tightly against the outer wall of the oil outlet 31, completely sealing the stepped oil outlet channel. When the compressor is running under normal load, lubricating oil continuously accumulates on the inner wall of the annular stepped structure, gradually forming a stable oil pressure. When the oil pressure value is greater than the preload of the coil spring 55, the oil pushes the oil baffle 51 outward around the rotating frame 53 to open, and the lubricating oil accumulated inside the stepped structure is discharged outward and flows into the outer peripheral inclined return oil groove 32. After the unit stops, the pressure difference inside the rotor cavity disappears quickly, and the oil pressure inside the stepped structure decreases synchronously. The coil spring 55 rebounds and drives the oil baffle 51 to press and seal the oil outlet 31 again. Compared to the traditional open annular steps without baffles 51, this solution normally closes the oil outlet channel, which can force oil mist to remain on the step wall for a long time to be adsorbed and accumulated, effectively improving the oil-gas pre-separation efficiency. After the equipment is shut down, the step oil passage can be completely blocked, preventing the oil and oil mist inside the lower oil storage tank 11 from flowing back into the rotor compression chamber through the central through hole, thus completely solving the defects of oil spraying and oil and carbon buildup on the rotor surface during the next start-up of the unit. The inner and middle steps are equipped with independent one-way opening and closing components 5 to achieve independent oil accumulation and discharge in layers, balancing the oil-gas separation load of the three annular steps, and preventing problems such as local airflow short circuit, disordered oil outflow, and overload of one side of the step.

[0039] The conical guide head 6 is suspended and installed below the bottom of the annular stepped oil baffle 3. The large end of the conical guide head 6 faces upward and the cone tip faces downward. The outer diameter of the bottom of the large end of the guide head is larger than the inner diameter of the central through hole of the oil baffle. The flat bottom surface of the large end of the guide head is directly opposite the central through hole above. A ring-shaped ventilation gap is reserved between the conical outer wall of the conical guide head 6 and the lower end face of the annular stepped oil baffle 3, which allows the low-pressure airflow after diversion to turn back upward. The high-speed oil-gas mixture ejected downwards from the rotor cavity vertically impacts the large-head surface of the conical guide head 6. After contacting the conical surface, the high-speed airflow is evenly dispersed and split in all directions. Large-diameter oil droplets carried inside the airflow are subjected to inertial impact, adhering tightly to the outer wall of the conical guide head 6 and continuously converging into liquid lubricating oil. The lubricating oil drips directly downwards from the tip of the cone and falls into the lower oil storage tank body 11, completing the first-stage inertial coarse separation. The dispersed and depressurized low-pressure airflow bypasses the outer wall of the conical guide head 6, passes through the guide head and the annular stepped baffle. The annular ventilation gap between the oil weirs 3 folds upwards and enters the three-layer annular steps for secondary fine oil-gas separation; the conical guide head 6 can intercept most of the large oil droplets in the airflow in advance, significantly reducing the total amount of oil mist entering the annular steps and reducing the separation load of the annular step oil weirs 3; at the same time, it disperses and buffers the vertically rushing high-pressure oil and gas, avoiding the oil and gas from impacting the oil surface inside the oil storage tank body 11 at high speed and generating a large amount of splashing secondary oil mist, reducing the generation of fine oil mist from the source, and further improving the overall oil-gas separation effect of the whole machine; Two sets of fixing structures 7 are set on the top of the mounting frame 1 for quick disassembly and assembly of the oil storage tank body 11. The fixing structure 7 includes a fixing box 71 and a connecting bracket 75. The connecting bracket 75 is fixedly connected to the outside of the oil storage tank body 11. The locking frame 73 is externally rotatably provided with a hinge seat 72. The hinge seat 72 and the fixing box 71 are fixedly connected. The locking frame 73 relies on a spring 74 to provide locking and restoring force. A locking block 76 is set on the connecting bracket 75. The locking frame 73 and the locking block 76 are provided with matching guide slopes on opposite sides. Under normal operating conditions, spring 74 pushes lock frame 73 to maintain the locked position, and lock frame 73 clamps block 76, stably locking and suspending oil tank body 11 below mounting frame 1. When disassembly and assembly operations such as maintenance, filter replacement, and cleaning of accumulated oil are required on oil tank body 11, the operator presses top rod 77 to push lock frame 73 to rotate within hinge seat 72 against the elastic force of spring 74, causing the locking end and block 76 to separate and release the locking constraint, and oil tank body 11 can be removed. During reassembly, the connecting bracket 75 on one side of oil tank body 11 is inserted into fixed box 71. Connecting bracket 75 drives block 76 to move down, and the inclined surface of block 76 presses against the inclined surface of lock frame 73 to automatically push lock frame 73 open. After block 76 is in place, spring 74 pushes lock frame 73 to automatically spring back and lock, without the need for additional fasteners, greatly simplifying the disassembly and assembly process of oil tank body 11 and shortening equipment maintenance time.

[0040] Working principle: The drive structure 22 starts and drives the male and female rotors inside the rotor housing 21 to mesh and compress air. The lubricating oil is atomized to form an oil-air mixture. Under the action of gravity and cavity pressure, the mixture passes vertically downward through the central through hole of the annular stepped oil baffle 3. The high-speed oil-air first vertically impacts the lower conical guide head 6 to complete the pre-coarse separation. Large-diameter oil droplets fall directly along the conical surface and flow into the oil storage tank body 11. The low-pressure airflow after being dispersed and depressurized passes through the annular gap between the guide head and the oil baffle and turns upward, flowing sequentially through the inner ring, middle ring and outer ring. A ring-shaped stepped structure with a high outer edge and a low outer edge; fine oil mist in the airflow continuously adsorbs and condenses into oil on the stepped wall. The oil is collected from the inside to the outside of the stepped structure by the radial slope of the stepped structure and flows to the inclined return oil groove 32 on the outer periphery. The one-way opening and closing component 5 on the outside of the stepped oil outlet 31 normally closes the oil passage. After sufficient oil pressure is formed inside the stepped structure, the oil baffle 51 is pushed open to collect and discharge the oil. The lubricating oil collected in the inclined return oil groove 32 flows in two directions: under normal load, the oil is directionally transported to the rotor bearing seat along the inclined oil guide bracket 4 to continuously lubricate and dissipate heat for the bearing; under high load and oil overload, the oil is transported in two directions. Excess lubricating oil overflows through the overflow trough and oil storage box 33, flowing back to the oil storage tank body 11. Low-oil-mist compressed air, after pre-separation via an annular stepped ladder, continues downward into the oil storage tank body 11, where residual ultrafine oil mist is removed by the fine separation filter element, ultimately outputting clean, oil-free compressed air. After the unit stops, the coil spring 55 pulls the oil baffle 51 to reset and seal all oil outlets 31, completely isolating the upward flow of oil mist and oil from the oil storage tank body 11, ensuring no oil injection failure during the next startup. When maintenance or replacement of the oil storage tank body 11 is required... During disassembly and assembly operations such as changing filter elements and cleaning accumulated oil, the operator presses the top rod 77, causing the locking frame 73 to rotate within the hinge seat 72 against the elastic force of the spring 74. The locking end disengages from the locking block 76 to unlock, allowing the oil tank body 11 to be removed. During reassembly and resetting, the connecting bracket 75 of the oil tank body 11 is placed into the fixing box 71, and the locking block 76 moves down and pushes open the locking frame 73 through the inclined surface. After the locking block 76 is in place, the spring 74 pushes the locking frame 73 back to automatically lock, eliminating the need for additional fastening parts, simplifying the disassembly and assembly steps of the oil tank, and shortening the maintenance time.

[0041] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0042] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A bottom-mounted air retarder compressor for oil storage tanks, comprising a mounting frame (1) and an oil storage tank body (11) disposed therein, wherein a compression power assembly (2) is fixedly disposed on the top of the oil storage tank body (11), the compression power assembly (2) comprising a rotor housing (21) and a drive structure (22) disposed on one side thereof, characterized in that, An oil baffle and oil collection lubrication assembly is provided inside the rotor housing (21), the oil baffle and oil collection lubrication assembly comprising: The annular stepped oil weir (3) can achieve pre-separation of oil and gas. It has at least four inclined return oil grooves (32) on both sides, and the annular stepped oil weir (3) is provided with a support plate for providing installation conditions on the outside. Among them, the central part of the annular stepped oil weir (3) is provided with a through hole for the oil-gas mixture to pass through; When the equipment is running, the compressed oil-gas mixture passes vertically downward through the central through hole of the annular stepped oil baffle (3). After the oil and gas collide with the oil surface in the oil storage tank, the airflow is turned upward and flows back to the multi-layer annular steps of the oil baffle, so that the oil mist adheres to the surface of the steps and gathers to form oil, thus completing the pre-separation of oil and gas. At least four inclined oil guide brackets (4) are set on both sides of the annular stepped oil baffle (3), and the end of the inclined return oil groove (32) away from the annular stepped oil baffle (3) extends into the inclined oil guide bracket (4); The large-diameter oil droplets separated and precipitated are collected in the inclined return oil groove (32), and under the action of pressure difference in the cavity, they are transported to the rotor bearing seat through the inclined oil guide bracket (4) to lubricate the rotor bearing.

2. The bottom-mounted oil storage tank type air retarder compressor according to claim 1, characterized in that, The inner walls on both sides of the inclined oil return groove (32) are provided with overflow grooves, and the two sides of the inclined oil return groove (32) are provided with oil storage boxes (33).

3. The bottom-mounted oil storage tank type air retarder compressor according to claim 2, characterized in that, The inner wall of the overflow groove and the side wall of the oil storage box (33) are provided with oil outlet holes. When the oil-gas separation volume increases and the oil level in the inclined return oil groove (32) continues to overflow the height of the overflow groove, the excess lubricating oil will overflow from the oil outlet hole to avoid excessive oil from flowing into the inclined oil guide bracket (4) and causing the bearing oil supply to be too large.

4. The bottom-mounted oil storage tank type air retarder compressor according to claim 1, characterized in that, The annular stepped oil weir (3) is composed of an inner annular step, a middle annular step, and an outer annular step arranged coaxially. Each annular step is arranged in a stepped manner from the inside to the outside along the radial direction.

5. A bottom-mounted oil storage tank type air retarder compressor according to claim 4, characterized in that, The inner ring step, middle ring step and outer ring step of the annular stepped oil weir (3) are each provided with at least two oil outlets (31). The oil mist carried by the returning airflow adheres to the inner, middle and outer ring steps and continuously accumulates oil, causing the oil to flow from the inside to the outside under the action of gravity and collect in the inclined return oil tank (32).

6. A bottom-mounted oil storage tank type air retarder compressor according to claim 5, characterized in that, The outer side of the oil outlet (31) of the inner ring annular step and the middle ring annular step is provided with a one-way opening and closing component (5), the one-way opening and closing component (5) includes: An oil baffle (51) is movably positioned on one side of the oil outlet (31) to control the opening and closing of the oil circuit; At least two mounting plates (54) are fixedly installed on the outer wall of the annular stepped oil baffle (3) and distributed on one side of the oil baffle (51).

7. A bottom-mounted oil storage tank type air retarder compressor according to claim 6, characterized in that, At least two rotating frames (53) are fixedly provided on one side of the oil baffle (51), and each of the two mounting plates (54) is provided with a coil spring (55) for resetting the oil baffle (51). The rotating frame (53) and the mounting plate (54) are movably connected, and the inner ring of the coil spring (55) is fixedly sleeved on the rotating frame (53).

8. A bottom-mounted oil storage tank type air retarder compressor according to claim 7, characterized in that, When the oil accumulation reaches a certain level and the oil pressure is sufficient to overcome the preload of the coil spring (55), the oil pushes the oil baffle (51) outward, causing the oil baffle (51) and the annular stepped oil baffle (3) to separate, allowing the lubricating oil accumulated in the step to flow outward from the open channel and into the inclined return oil groove (32).

9. A bottom-mounted oil storage tank type air retarder compressor according to claim 1, characterized in that, The bottom of the annular stepped oil baffle (3) is provided with a conical guide head (6) suspended in the air, and a ventilation gap is formed between the conical guide head (6) and the annular stepped oil baffle (3). The tapered guide head (6) has its large end facing upward and its cone tip facing downward. The outer diameter of the bottom of the large end is larger than the inner diameter of the through hole, and the bottom surface of the large end faces the through hole above. Oil and gas rush downwards from the through hole to the large head of the conical guide head (6), and are quickly dispersed and diverted by the conical surface. The oil mist adheres to the conical wall by inertia, gathers into oil, and flows down the conical surface into the oil storage tank. The airflow passes through the gap between the conical guide head (6) and the annular stepped oil baffle (3) and turns back upwards, entering the annular stepped layer separation, greatly reducing the amount of oil mist entering the annular stepped oil baffle (3) and reducing the separation load of the annular stepped oil baffle (3).

10. A bottom-mounted oil storage tank type air retarder compressor according to claim 1, characterized in that, The top of the mounting frame (1) is fixedly provided with two sets of fixing structures (7) for quick assembly and disassembly of the oil storage tank body (11). The fixing structure (7) includes a fixing box (71) and a connecting bracket (75). The connecting bracket (75) is fixedly connected to the oil storage tank body (11). A locking frame (73) is movably provided on one side of the inner wall of the fixing box (71). A spring (74) is provided on one side of the locking frame (73) to reset it. A locking block (76) is fixedly provided on one side of the connecting bracket (75). A top rod (77) is movably provided on one side of the fixing box (71). The locking end of the lock frame (73) and the side of the latch block (76) that are close to each other are provided with parallel inclined surfaces.

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