Air compressor and lubricating oil supply system and oil-gas separator thereof

Abstract

The utility model discloses an air compressor and a lubricating oil supply system and an oil-gas separator thereof, and belongs to the technical field of air compressor equipment, the oil-gas separator of the air compressor comprises a rough filtration mechanism, the rough filtration mechanism comprises a rough filtration seat and a filter screen; wherein the rough filtration seat is detachably mounted at an oil outlet of the oil-gas separator, a through oil passing channel is formed in the rough filtration seat, and the filter screen is mounted in the oil passing channel; a containing groove used for collecting impurities is machined in the rough filtering base. The oil-gas separator can be applied to a lubricating oil supply system of the air compressor, and the coarse filtering mechanism is additionally arranged at the oil outlet of the oil-gas separator to filter and collect impurities, so that large impurities can be effectively prevented from entering the temperature control valve element, and normal use of the air compressor is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of air compressor equipment, and more specifically to an air compressor and its lubricating oil supply system and an oil-gas separator. Background Art

[0002] When the oil-injection lubricated air compressor is working, the lubricating oil and gas mixture are compressed together inside the compressor main unit. Among them, the oil-gas separator is an essential device of the air compressor, which is used to separate oil and gas and store lubricating oil. As a medium in the compression process of the air compressor main unit, lubricating oil plays a role in lubrication, rust prevention, cooling, sealing, noise reduction, etc.

[0003] The temperature control valve is also a key component of the air compressor. The valve core inside the temperature control valve controls the size of the flow channel by responding to temperature changes, and then controls the mixing ratio of cold oil and hot oil in the lubricating oil to achieve a suitable injection temperature for the air compressor host. When the oil temperature is too high, the temperature control valve opens wider, causing more hot oil to flow to the oil cooler. After the hot oil is cooled, the temperature of the mixed injection oil decreases, ultimately ensuring that the air compressor maintains a suitable exhaust temperature and operates stably. In most current air compressor configurations, the oil supply from the oil-gas separator is directly fed into the temperature control valve seat. The temperature control valve adjusts the flow channel according to the oil temperature and distributes the ratio of cold oil to hot oil. The oil filter filters the mixed oil composed of cold oil and hot oil, and then sprays it into the compressor cavity.

[0004] In this regard, although the current air compressor strictly controls the quality of parts and repeatedly cleans and magnetically absorbs the inside of the parts before the system is assembled, this cannot completely eliminate the residual impurities in the dead corners of components such as pipelines and oil-gas separators, such as welding slag and rust. In addition, with the use of the air compressor, impurities such as dust in the air and impurities such as iron filings and welding slag that originally remained in the system will enter the lubricating oil. The lubricating oil with impurities will be stuck in the valve core of the temperature control valve when passing through the temperature control valve, causing the valve core to be stuck and unable to move according to the change of oil temperature, which will cause the oil temperature to be too high or too low. When the oil temperature is too high, it will cause the unit to shut down at high temperature at the least, and the compressor host will be stuck due to overheating and expansion at the worst; when the oil temperature is too low, it will cause condensation of condensed water in the oil system, causing rust on the transmission parts, causing wear on the compressor, and affecting the performance and life of the compressor.

[0005] After searching, the application case with Chinese patent application number 2023104181700 discloses an oil-injected screw compressor, including a mounting frame, one side of the upper part of the mounting frame is fixedly connected to the housing, the ultrasonic detector is connected to the probe through a signal line, the upper part of the first oil-gas separation tank is provided with a first oil-gas separator core, the upper part of the second oil-gas separation tank is provided with a second oil-gas separator core, the lower part of the oil storage tank is evenly distributed with baffles, the outer walls on both sides of the oil storage tank are fixedly connected with vibrators, and the middle part of the outer bottom wall of the oil storage tank is fixedly connected with a strong magnet. In this patent application, the lubricating oil mixed with compressed air is separated by the first oil filter and the second oil filter, cooled by the oil cooler, and then enters the oil storage tank. The metal particles in the lubricating oil are settled to the bottom of the oil storage tank through the cooperation of the strong magnet and the vibrator, and the metal particles and the lubricating oil inside the lubrication are relatively separated by the baffle. This application cannot solve the problem of the above-mentioned temperature control valve being stuck. In addition, the metal particles gather at the bottom of the oil storage tank, which is not conducive to the regular cleaning of the metal particles.

[0006] In addition, the Chinese patent application No. 2023221991051 discloses an oil-gas separator in a HVAC device, including a separator housing and a cooling box, the top of the separator housing is equipped with an intake connecting pipe and an exhaust connecting pipe, the interior of the separator housing is fixedly connected with a fixed plate and a sliding rod, the fixed plate is provided with a filter hole, a movable block is slidably connected to the sliding rod, a brush is installed at the bottom of the movable block, and a driving mechanism for controlling the reciprocating sliding of the movable block on the sliding rod is provided inside the separator housing. The filter holes on the fixed plate are cleaned by the brush at the bottom of the movable block to prevent impurities from blocking the filter holes and ensure the normal circulation of the lubricating oil. The automatic cleaning method reduces the workload of the staff, and the cooling mechanism inside the cooling box is used to cool the filtered high-temperature lubricating oil to prevent the high-temperature lubricating oil from returning to the compressor and affecting the service life of the compressor. This application realizes automatic cleaning of impurities, but its structure is relatively complex. Utility Model Content

[0007] In view of the technical problem that impurities are easy to enter the temperature control valve during the use of the existing air compressor, causing the temperature control valve to get stuck, the utility model provides an air compressor and its lubricating oil supply system and oil-gas separator. The utility model adds a coarse filtering mechanism at the oil outlet of the oil-gas separator to filter and collect impurities, thereby effectively preventing large impurities from entering the temperature control valve core and ensuring its normal use.

[0008] In order to achieve the above-mentioned purpose, the technical solution provided by the utility model is:

[0009] The first aspect of the utility model provides an oil-gas separator for an air compressor, comprising a coarse filter mechanism, which comprises a coarse filter seat and a filter screen; wherein: the coarse filter seat is detachably mounted on the oil outlet of the oil-gas separator, and is provided with an oil passage running through it, and the filter screen is installed in the oil passage; and a receiving groove for collecting impurities is machined on the coarse filter seat.

[0010] Furthermore, a magnet is provided at the bottom of the receiving groove.

[0011] Furthermore, the oil passage is a stepped through hole, which is arranged in sequence as a first hole, a second hole and a third hole along the flow direction of the lubricating oil, wherein the apertures of the first hole and the third hole are both larger than the aperture of the second hole, and the filter is installed at the connection between the first hole and the second hole, and a magnet groove is provided at the bottom of the first hole in the coarse filter seat.

[0012] Furthermore, a sealing groove is provided on the oil inlet side of the coarse filter seat, and a sealing ring is installed in the sealing groove.

[0013] The second aspect of the utility model provides a lubricating oil supply system for an air compressor, comprising a compressor host, an oil-gas separator, a temperature control valve, an oil cooler and an oil filter connected in sequence along the flow direction of the lubricating oil, wherein the oil-gas separator adopts the oil-gas separator of the above-mentioned air compressor.

[0014] Furthermore, the temperature control valve is installed at the oil outlet of the oil-gas separator and is located at the oil outlet side of the coarse filter mechanism.

[0015] Furthermore, the oil inlet side of the coarse filter seat is detachably connected to a flange located at the oil outlet of the oil-gas separator; and the temperature control valve is installed on the oil outlet side of the coarse filter seat.

[0016] Furthermore, the temperature control valve includes a temperature control valve seat and a temperature control valve core installed in the temperature control valve seat, and the temperature control valve seat is detachably connected to the oil outlet side of the coarse filter seat.

[0017] A third aspect of the utility model provides an air compressor, comprising the above-mentioned oil-gas separator of the air compressor or the above-mentioned lubricating oil supply system of the air compressor.

[0018] Compared with the prior art, the technical solution provided by the utility model has the following beneficial effects:

[0019] (1) The utility model optimizes the design of the oil-gas separator. By setting a detachable coarse filter mechanism at the oil outlet of the oil-gas separator, on the one hand, the lubricating oil can be filtered before entering the temperature control valve to remove impurities therein, so as to prevent impurities from entering the temperature control valve and causing the valve core to be stuck, which is beneficial to ensure the stable operation of the air compressor; on the other hand, it is convenient for the disassembly and assembly operations required for daily maintenance. The disassembled coarse filter mechanism can be repeatedly rinsed and then put back for use. The operation is simple, there is no loss, and the one-time investment cost is low.

[0020] (2) The utility model further has a receiving groove for collecting impurities on the coarse filter seat, and a magnet is provided at the bottom of the receiving groove, so as to facilitate the adsorption and collection of filtered impurities; in addition, the utility model also has a sealing groove on the oil inlet side of the coarse filter seat, and a sealing ring is installed in the sealing groove, so as to facilitate ensuring the sealing of the connection between the coarse filter mechanism and the oil outlet of the oil-gas separator to prevent oil leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic structural diagram of the coarse filter seat in the embodiment of the utility model.

[0022] Figure 2 It is a plan view of the coarse filter seat in the embodiment of the utility model.

[0023] Figure 3 for Figure 2 Schematic diagram of the cross section at AA in the middle.

[0024] Figure 4 This is a schematic diagram of the disassembled structure of the oil-gas separator of the air compressor of the utility model embodiment;

[0025] Figure 5 This is a schematic diagram of the assembly structure of the oil-gas separator of the air compressor of the utility model embodiment;

[0026] Figure 6 The utility model is a schematic diagram of the flow chart of the lubricating oil supply system of the air compressor according to the embodiment of the utility model.

[0027] Description of labels:

[0028] 1. Coarse filter seat; 101. First hole; 102. Second hole; 103. Third hole;

[0029] 2. Magnet;

[0030] 3. Magnet groove;

[0031] 4. Filter;

[0032] 5. Sealing groove;

[0033] 6. Screws;

[0034] 7. Flange;

[0035] 8. Temperature control valve seat;

[0036] 9. Temperature control valve core. DETAILED DESCRIPTION

[0037] In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of this application.

[0038] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so as to describe the embodiments of the present application described herein.

[0039] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inside", "outside", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are mainly intended to better describe the present application and its embodiments, and are not intended to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation. Moreover, in addition to being used to indicate orientation or positional relationships, some of the above terms may also be used to express other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the present application can be understood according to the specific circumstances.

[0040] This embodiment provides an oil-gas separator for an air compressor, which includes a top cover and a cylinder; the top cover and the cylinder are combined to form a lubricating oil storage chamber; the top cover is provided with an air outlet for compressed air discharge, and the side of the cylinder is provided with an air inlet, an oil outlet, a refueling port, and a liquid level observation mirror.

[0041] like Figure 1 , Figure 4 , Figure 5 As shown, the oil-gas separator of the air compressor of this embodiment also includes a coarse filtering mechanism, which includes a coarse filtering seat 1 and a filter screen 4; wherein: the coarse filtering seat 1 can be detachably installed at the oil outlet of the oil-gas separator, a through oil passage is opened in the coarse filtering seat 1, and the filter screen 4 is installed in the oil passage; and a receiving groove for collecting impurities is processed on the coarse filtering seat 1.

[0042] The lubricating oil flows out from the oil outlet of the oil-gas separator and enters the oil passage in the coarse filter seat 1. Impurities in the lubricating oil are blocked by the filter screen 4. The receiving groove collects the impurities blocked by the filter screen 4, thereby preventing the impurities from entering the temperature control valve and causing the valve core to be stuck, ensuring the stable operation of the air compressor. At the same time, the coarse filter seat 1 can be detachably installed at the oil outlet of the oil-gas separator, thereby facilitating the disassembly and assembly operations required for daily maintenance. The disassembled coarse filter mechanism can be repeatedly rinsed and then reinstalled for use. The operation is simple, there is no loss, and the one-time investment cost is low.

[0043] In order to facilitate the collection of impurities, especially ferromagnetic materials such as iron filings and welding slag, such as Figure 2 As shown, further, a magnet 2 is provided at the bottom of the containing tank, which is conducive to the rapid sedimentation and adsorption of impurities. Further preferably, the magnet 2 is a strong magnet to increase the adsorption capacity.

[0044] Preferably, Figure 3 As shown, the oil passage is a stepped through hole, and the stepped through holes are the first hole 101, the second hole 102 and the third hole 103 in the direction of the flow of the lubricating oil, wherein the first hole 101 is larger than the aperture of the second hole 102, and the filter 4 is installed at the connection between the first hole 101 and the second hole 102, so as to facilitate the fixed welding, weld grinding and manufacturing of the filter; the third hole 103 is larger than the aperture of the second hole 102, so as to ensure that the flow path of the lubricating oil is not throttled, thereby ensuring the oil supply of the compressor. When in use, the filter 4 blocks impurities in the lubricating oil, and the impurities remain in the first hole 101. The filter 4 and the first hole 101 constitute a holding tank for impurities, and the impurities settle at the bottom of the first hole 101.

[0045] Further preferably, a magnet groove 3 is opened at the bottom of the first hole 101 in the coarse filter seat 1 , and the magnet 2 is placed in the magnet groove 3 .

[0046] In some embodiments, the filter screen 4 is fully welded and fixed at the connection between the first hole 101 and the second hole 102. More specifically, the filter screen 4 is formed by weaving and pressing steel wires, or can be made by punching steel plates.

[0047] like Figure 1 , Figure 2 As shown, a sealing groove 5 is provided on the oil inlet side of the coarse filter seat 1, and a sealing ring is installed in the sealing groove 5. The sealing ring is used to improve the sealing performance of the contact surface between the coarse filter seat 1 and the flange 7 to prevent oil leakage. Preferably, the sealing ring is sealed by an O-ring.

[0048] like Figure 6As shown, this embodiment also provides a lubricating oil supply system for an air compressor, comprising a compressor host, an oil-gas separator, a temperature control valve, an oil cooler and an oil filter connected in sequence along the flow direction of the lubricating oil, wherein the oil-gas separator adopts the oil-gas separator of the air compressor of any of the above embodiments, and the lubricating oil flows through the compressor host, the oil-gas separator, the temperature control valve, the oil cooler, the oil filter in sequence, and then returns to the compressor host. Among them, the temperature control valve controls the amount of lubricating oil flowing from the oil cooler to the oil filter.

[0049] Specifically, Figure 4 As shown, the temperature control valve includes a temperature control valve seat 8 installed and a temperature control valve core 9 installed in the temperature control valve seat 8.

[0050] The working principle of the temperature control valve is as follows: the valve core of the temperature control valve is equipped with a temperature sensing element, a spring, and a diaphragm. When the temperature of the medium flowing through changes, the valve core will expand and contract to push the spring and change the size of the valve core's channel. When the temperature is too high, the valve core will open the channel to allow more hot oil to flow into the oil cooler; when the temperature is too low, the valve core will reduce the opening to reduce the hot oil entering the oil cooler. Through the above adjustment process, the temperature of the lubricating oil finally injected into the main body cavity of the compressor is maintained within a reasonable range, avoiding high temperature affecting the operation and low-temperature condensation water damaging the oil and the compressor.

[0051] The working process of the air compressor lubricating oil supply system is as follows: the compressor host sprays out the compressed oil-gas mixture, the oil-gas mixture enters the oil-gas separator, the hot oil flows out from the oil outlet of the oil-gas separator, and enters the coarse filter mechanism and the temperature control valve in turn. The temperature control valve controls the amount of oil flowing to the oil cooler according to the oil temperature. The oil cooler cools the hot oil. The cold oil flowing out of the oil cooler and the hot oil directly flowing out of the temperature control valve are mixed into warm oil. The warm oil passes through the oil filter and enters the compressor host.

[0052] Preferably, the temperature control valve is installed at the oil outlet of the oil-gas separator and is located at the oil outlet side of the coarse filtering mechanism.

[0053] Generally, the oil outlet of the oil-gas separator is provided with a flange 7. Specifically, the oil inlet side of the coarse filter seat 1 is detachably connected to the flange 7 located at the oil outlet of the oil-gas separator, and the temperature control valve is installed on the oil outlet side of the coarse filter seat 1. More specifically, the temperature control valve seat 8 is detachably connected to the oil outlet side of the coarse filter seat 1. In order to prevent lubricating oil leakage, a sealing ring is also used to seal between the coarse filter seat 1 and the temperature control valve seat 8.

[0054] It can be seen from the above description that in some preferred embodiments, the oil inlet side and the oil outlet side of the coarse filter seat 1 are respectively detachably mounted on the flange 7 and the temperature control valve seat 8 of the oil-gas separator, that is, both ends of the coarse filter seat 1 are detachably connected, thereby facilitating regular cleaning of the coarse filter mechanism.

[0055] As a preferred method for detachable connection of flange 7, temperature control valve seat 8 and coarse filter seat 1, flange 7, temperature control valve seat 8 and coarse filter seat 1 are all provided with corresponding connection holes, the connection hole in flange 7 is a threaded hole, the connection holes in temperature control valve seat 8 and coarse filter seat 1 can be set as through holes or threaded holes, and the connection holes in temperature control valve seat 8 and coarse filter seat 1 are preferably through holes. Screw 6 passes through the connection holes in temperature control valve seat 8, coarse filter seat 1 and flange 7 in sequence, and screw 6 is threadedly connected to the connection hole in flange 7. Other detachable connection methods are also possible, such as other threaded fastening methods and pin connection methods.

[0056] This embodiment also provides an air compressor, including the oil-gas separator of the air compressor described in any of the above implementation schemes or the lubricating oil supply system of the air compressor described in any of the above implementation schemes.

[0057] The above schematically describes the present invention and its implementation methods, which are not restrictive. The drawings show only one implementation method of the present invention, and the actual structure is not limited thereto. Therefore, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. An oil-gas separator for an air compressor, characterized in that: The invention comprises a coarse filtering mechanism, wherein the coarse filtering mechanism comprises a coarse filtering seat (1) and a filtering net (4); wherein: The coarse filter seat (1) is detachably mounted on the oil outlet of the oil-gas separator, and is provided with an oil passage extending therethrough. The filter screen (4) is installed in the oil passage, and a receiving groove for collecting impurities is machined on the coarse filter seat (1).

2. The oil-gas separator of the air compressor according to claim 1, characterized in that: A magnet (2) is provided at the bottom of the containing groove.

3. The oil-gas separator of the air compressor according to claim 1 or 2, characterized in that: The oil passage is a stepped through hole, which is sequentially a first hole (101), a second hole (102) and a third hole (103) along the flow direction of the lubricating oil, wherein the apertures of the first hole (101) and the third hole (103) are both larger than the aperture of the second hole (102), the filter screen (4) is installed at the connection between the first hole (101) and the second hole (102), and a magnet groove (3) is provided in the coarse filter seat (1) at the bottom of the first hole (101).

4. The oil-gas separator of the air compressor according to claim 3, characterized in that: A sealing groove (5) is provided on the oil inlet side of the coarse filter seat (1), and a sealing ring is installed in the sealing groove (5).

5. A lubricating oil supply system for an air compressor, characterized in that: It comprises a compressor main unit, an oil-gas separator, a temperature control valve, an oil cooler and an oil filter which are sequentially connected along the flow direction of the lubricating oil, wherein the oil-gas separator adopts the oil-gas separator of the air compressor described in any one of claims 1-4.

6. The lubricating oil supply system for an air compressor according to claim 5, characterized in that: The temperature control valve is installed at the oil outlet of the oil-gas separator and is located at the oil outlet side of the coarse filter mechanism.

7. The air compressor lubricating oil supply system according to claim 6, characterized in that: The oil inlet side of the coarse filter seat (1) is detachably connected to a flange (7) located at the oil outlet of the oil-gas separator; and the temperature control valve is installed on the oil outlet side of the coarse filter seat (1).

8. The air compressor lubricating oil supply system according to claim 7, characterized in that: The temperature control valve comprises a temperature control valve seat (8) and a temperature control valve core (9) installed in the temperature control valve seat (8); the temperature control valve seat (8) is detachably connected to the oil outlet side of the coarse filter seat (1).

9. An air compressor, characterized in that: An oil-gas separator for an air compressor comprising any one of claims 1-4 or a lubricating oil supply system for an air compressor comprising any one of claims 5-8.

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