Oil injection quantity adjusting structure and air compressor comprising same

Abstract

The utility model discloses an oil injection quantity adjusting structure and an air compressor comprising the same, the oil injection quantity adjusting structure comprises a shell, a first-stage bearing seat and a flow limiting plug, the first-stage bearing seat is connected to the shell and forms an interstage flow channel, a main oil way is arranged in the first-stage bearing seat, and the flow limiting plug is arranged in the first-stage bearing seat. An oil spraying hole and a process hole are formed in the first-stage bearing seat, the process hole is sunken inwards from the outer surface of the first-stage bearing seat and is communicated with the main oil way, and the two ends of the oil spraying hole are communicated with the main oil way and the inter-stage flow channel respectively; the auxiliary hole and the oil spraying hole are correspondingly formed in the two sides of the main oil way respectively, so that the flow limiting plug penetrates through the auxiliary hole and the main oil way and is detachably connected into the oil spraying hole. The air compressor achieves the most appropriate oil injection quantity, avoids extra power consumption caused by excessive oil injection quantity, achieves the purpose of energy conservation, and also avoids damage or service life reduction caused by high temperature of the air compressor due to too small oil injection quantity.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of oil injection quantity adjusting structure and air compressor comprising it. BACKGROUND

[0002] The design of current integrated two-stage oil injection type screw air compressor is generally the same air compressor, with different gear ratio gears are used under the condition that other designs are unchanged, so that the demand of different gas volume and power consumption is reached, and the number and size of the oil injection hole in the compression chamber and the inter-stage are fixed in the traditional design, when the gear with new gear ratio is replaced, too much or too little oil injection amount can occur, so that the energy consumption is high or the cooling and lubrication is insufficient, and the compressor is damaged. SUMMARY

[0003] The utility model aims at overcoming the above-mentioned deficiencies existing in the prior art, and provides an oil injection quantity adjusting structure and an air compressor comprising the same.

[0004] The utility model is realized by the following technical solutions:

[0005] An oil injection quantity adjusting structure comprises a shell, a primary bearing seat and a flow-limiting plug head, the primary bearing seat is connected to the shell and forms an inter-stage flow channel, the primary bearing seat has a main oil passage therein, an oil injection hole and a process hole are formed in the primary bearing seat, the process hole is recessed inward from the outer surface of the primary bearing seat and communicates with the main oil passage, the two ends of the oil injection hole communicate with the main oil passage and the inter-stage flow channel respectively, and the process hole and the oil injection hole are respectively arranged on the two sides of the main oil passage, so that the flow-limiting plug head passes through the process hole and the main oil passage and is detachably connected in the oil injection hole.

[0006] Further, the outer surface of the flow-limiting plug head is threadedly connected with the inner wall surface of the oil injection hole.

[0007] Further, a flow-limiting hole is formed in the flow-limiting plug head, the two ends of the flow-limiting hole respectively communicate with the main oil passage and the inter-stage flow channel, so that the cooling oil in the main oil passage is atomized and sprayed into the inter-stage flow channel through the flow-limiting hole.

[0008] Further, the flow-limiting plug head has an internal hexagonal recess, and the internal hexagonal recess is recessed inward from the side of the flow-limiting plug head towards the process hole.

[0009] Further, the flow-limiting hole extends from the bottom of the internal hexagonal recess to the side of the flow-limiting plug head towards the inter-stage flow channel.

[0010] Further, the oil injection quantity adjusting structure further comprises a plug, and the plug is detachably connected in the process hole.

[0011] Further, the fuel injection amount adjusting structure further comprises a compression chamber located in the shell, the shell having an air inlet and an air outlet at two ends of the compression chamber respectively, so that air is sucked from the air inlet, compressed through the compression chamber and discharged from the air outlet to the inter-stage flow channel.

[0012] An air compressor comprising the fuel injection amount adjusting structure as described above.

[0013] The air compressor has the advantages that:

[0014] The fuel injection amount adjusting structure and the air compressor comprising the same have the advantages that: the oil injection hole and the process hole are formed in the primary bearing seat, the flow limiting plug head is installed in the oil injection hole through the process hole and the main oil path, the flow limiting plug head can be replaced, the most appropriate fuel injection amount can be adjusted according to actual conditions, the flow limiting plug head with a corresponding hole diameter is installed according to the requirements of different power consumption and air volume of the air compressor, the air compressor reaches the most appropriate fuel injection amount, the additional power consumption caused by excessive fuel injection amount is avoided, the energy-saving purpose is achieved, the air compressor is prevented from being damaged or having a reduced service life due to high temperature caused by insufficient fuel injection amount, the structure is simple, the use is convenient, and the cost is low. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 FIG. 1 is a schematic view of the internal structure of the fuel injection amount adjusting structure according to an embodiment of the present application.

[0016] Figure 2 FIG. 2 is a schematic view of the internal structure of the flow limiting plug head according to an embodiment of the present application. Figure 1 FIG. 3 is a partial enlarged view of part A of FIG. 2.

[0017] Figure 3 FIG. 4 is a schematic view of the structure of the flow limiting plug head according to an embodiment of the present application.

[0018] Figure 4 FIG. 5 is a schematic view of the internal structure of the flow limiting plug head according to an embodiment of the present application.

[0019] BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Shell 1

[0021] Inter-stage flow channel 11

[0022] Air inlet 12

[0023] Air outlet 13

[0024] Primary bearing seat 2

[0025] Main oil path 21

[0026] Oil injection hole 22

[0027] Process Hole 23

[0028] Flow limiting plug 3

[0029] Flow limiting orifice 31

[0030] 32mm internal hexagonal recess

[0031] Compression chamber 4

[0032] Plug 5 Detailed Implementation

[0033] The following description of the embodiments is with reference to the accompanying drawings, which illustrate specific embodiments in which the present invention can be implemented.

[0034] This embodiment discloses an air compressor, which includes a fuel injection quantity regulating structure. For example... Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the fuel injection quantity adjustment structure includes a housing 1, a primary bearing seat 2, and a flow restrictor 3. The primary bearing seat 2 is connected to the housing 1 and forms an interstage flow channel 11. The primary bearing seat 2 has a main oil passage 21. The primary bearing seat 2 is provided with a fuel injection hole 22 and a process hole 23. The process hole 23 is recessed inward from the outer surface of the primary bearing seat 2 and communicates with the main oil passage 21. The two ends of the fuel injection hole 22 are respectively connected to the main oil passage 21 and the interstage flow channel 11. The process hole 23 and the fuel injection hole 22 are respectively arranged on both sides of the main oil passage 21 so that the flow restrictor 3 passes through the process hole 23 and the main oil passage 21 and is detachably connected to the fuel injection hole 22.

[0035] The primary bearing housing 2 is connected to the housing 1, and the high-temperature gas inside the housing 1 flows into the interstage flow channel 11. The oil injection port 22 and process port 23 are respectively located on both sides of the main oil passage 21, allowing the external flow-limiting plug 3 to pass through the process port 23 and the main oil passage 21, with the flow-limiting plug 3 extending deep into and connecting to the oil injection port 22. The cooling oil in the main oil passage 21 is atomized and sprayed into the interstage flow channel 11 through the flow-limiting plug 3 in the oil injection port 22, thereby achieving the purpose of cooling the gas. By providing an oil injection hole 22 and a process hole 23 on the primary bearing housing 2, the flow-limiting plug 3 passes through the process hole 23 and the main oil passage 21 and is installed in the oil injection hole 22. The flow-limiting plug 3 and the primary bearing housing 2 are detachably connected, allowing for easy removal and replacement of the flow-limiting plug 3. The optimal oil injection quantity can be adjusted according to actual conditions. Based on the different power consumption and airflow requirements of the air compressor, a flow-limiting plug 3 with the corresponding orifice diameter can be installed to achieve the optimal oil injection quantity for the air compressor. This avoids excessive oil injection leading to additional power consumption, achieving energy saving, and also prevents insufficient oil injection from causing high temperatures that could damage the air compressor or reduce its service life. Furthermore, the structure is simple, easy to manufacture and replace, and has low cost.

[0036] In this embodiment, the outer surface of the flow-limiting plug 3 is threadedly connected to the inner wall of the oil injection hole 22. Threads are machined on the oil injection hole 22 and the flow-limiting plug 3 between the main oil passage 21 of the primary bearing housing 2 and the interstage flow channel 11. The outer surface of the flow-limiting plug 3 has external threads, and the inner wall of the oil injection hole 22 has internal threads. The flow-limiting plug 3 is connected to the internal threads of the primary bearing housing 2 via external threads. This threaded connection method makes installation and disassembly very convenient.

[0037] like Figure 2 , Figure 3 and Figure 4 As shown, a flow-limiting orifice 31 is formed inside the flow-limiting plug 3. The two ends of the flow-limiting orifice 31 are connected to the main oil passage 21 and the interstage flow channel 11, respectively, so that the cooling oil in the main oil passage 21 is atomized and sprayed out into the interstage flow channel 11 through the flow-limiting orifice 31. Specifically, the flow-limiting orifice 31 is located in the middle region of the flow-limiting plug 3 and penetrates the flow-limiting plug 3, so that the cooling oil in the main oil passage 21 is atomized and sprayed out into the interstage flow channel 11 through the flow-limiting orifice 31 of the flow-limiting plug 3, thereby achieving the purpose of cooling the compressed gas.

[0038] The flow restrictor 3 has an internal hexagonal recess 32, which is recessed inward from the side of the flow restrictor 3 facing the process hole 23. When disassembling the flow restrictor 3, a tool is inserted into the internal hexagonal recess 32 through the process hole 23 and the main oil passage 21, and then rotated to remove the flow restrictor 3 outward. When installing the flow restrictor 3, the tool is inserted through the process hole 23 and the main oil passage 21, aligning it with the injection hole 22. The tool is then rotated to rotate the flow restrictor 3, causing it to screw into the injection hole 22, thus completing the installation of the flow restrictor 3. The internal hexagonal recess 32 makes the installation and disassembly of the flow restrictor 3 very convenient, facilitating its replacement and controlling the amount of fuel injected into the interstage flow channel 11. The flow restrictor 3 is a headless internal hexagonal flow restrictor.

[0039] The flow-limiting orifice 31 extends from the bottom of the internal hexagonal recess 32 to the side of the flow-limiting plug 3 facing the interstage flow channel 11. The flow-limiting orifice 31 and the internal hexagonal recess 32 are coaxially arranged in the flow-limiting plug 3.

[0040] The fuel injection quantity adjustment structure also includes a plug 5, which is detachably connected to the process hole 23. The plug 5's connection to the process hole 23 prevents cooling oil in the main oil passage 21 from leaking out. When it is necessary to remove or install the flow-limiting plug 3, the plug 5 is removed from the primary bearing housing 2, and after the operation is completed, the plug 5 is resealed and inserted back into the process hole 23.

[0041] like Figure 1As shown, the fuel injection amount adjusting structure further comprises a compression chamber 4 located in the housing 1, the housing 1 has an air inlet 12 and an air outlet 13 located at two ends of the compression chamber 4 respectively, so that air is sucked from the air inlet 12 and discharged from the air outlet 13 to the inter-stage flow channel 11 after compression in the compression chamber 4. The working process of the fuel injection amount adjusting structure is that air is sucked from the air inlet 12, compressed in the compression chamber 4, and the compressed gas is discharged from the air outlet 13 through the inter-stage flow channel 11, while the cooling oil in the main oil way 21 is atomized and sprayed to the inter-stage flow channel 11 through the flow limiting hole 31 of the flow limiting plug head 3, so as to achieve the purpose of cooling the compressed gas. By designing the flow limiting hole 31 of the flow limiting plug head 3 with different hole diameters, corresponding to the requirements of different power consumption and air volume, finally according to the requirements of different power consumption and air volume of the air compressor, the flow limiting plug head 3 with corresponding hole diameter is installed to adjust to the required fuel injection amount.

[0042] The above only discloses the preferred embodiment of the utility model, of course, cannot limit the scope of the utility model right of the utility model, therefore, the equivalent change made according to the utility model claim still belongs to the range covered by the utility model.

Claims

1. A fuel injection amount adjusting structure characterized by comprising: The application relates to a lubricating oil injection structure of a lubricating oil injection pump, which comprises a shell, a primary bearing seat and a flow-limiting plug head, the primary bearing seat is connected to the shell and is formed with an inter-stage flow channel, the primary bearing seat is internally provided with a main oil path, the primary bearing seat is provided with an oil injection hole and a process hole, the process hole is recessed from the outer surface of the primary bearing seat and is communicated with the main oil path, the two ends of the oil injection hole are respectively communicated with the main oil path and the inter-stage flow channel, and the process hole and the oil injection hole are respectively arranged on the two sides of the main oil path, so that the flow-limiting plug head passes through the process hole and the main oil path and is detachably connected in the oil injection hole.

2. The fuel injection amount adjusting structure according to claim 1, characterized by The outer surface of the flow-limiting plug head is threadedly connected with the inner wall surface of the oil injection hole.

3. The fuel injection amount adjusting structure according to claim 1, characterized by The flow-limiting plug head is internally provided with a flow-limiting hole, the two ends of the flow-limiting hole are respectively communicated with the main oil path and the inter-stage flow channel, so that the cooling oil in the main oil path is atomized and sprayed into the inter-stage flow channel through the flow-limiting hole.

4. The fuel injection amount adjusting structure according to claim 3, characterized by The flow-limiting plug head is internally provided with an internal hexagonal groove, the internal hexagonal groove is recessed from the side of the flow-limiting plug head towards the process hole.

5. The fuel injection amount adjusting structure according to claim 4, wherein The flow-limiting hole extends from the groove bottom of the internal hexagonal groove to the side of the flow-limiting plug head towards the inter-stage flow channel.

6. The fuel injection amount adjusting structure according to claim 1, wherein The oil injection amount adjusting structure further comprises a plug, and the plug is detachably connected in the process hole.

7. The fuel injection amount adjusting structure according to claim 1, wherein The oil injection amount adjusting structure further comprises a compression chamber, the compression chamber is located in the shell, the shell is internally provided with an air suction port and an air exhaust port, the air suction port and the air exhaust port are respectively located at the two ends of the compression chamber, so that air is sucked from the air suction port, compressed in the compression chamber and discharged from the air exhaust port into the inter-stage flow channel.

8. An air compressor characterized by, The application relates to a lubricating oil injection pump, which comprises the oil injection amount adjusting structure as claimed in any one of claims 1-7.

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