Dry oil-free supercharging device
Patent Information
- Application Number
- CN202522133663.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-10
- Publication Date
- 2026-10-27
- Estimated Expiration
- 2035-10-10
AI Technical Summary
但是，无油活塞增压机的流量太小，无法满足用户对高压氮气的流量的需求；微油螺杆增压机增压得到的高压气体中含有水、油、空气等杂质，无法满足用户对高压氮气的纯度的要求
[0007]优选地，所述输油管上设置有油泵和油过滤器，且所述油过滤器位于所述油泵和所述分歧块之间。这样，在本实用新型干式无油增压装置中设置油泵和油过滤器，可利用油过滤器对油泵从油箱中抽出的润滑油进行二次过滤，进一步去除润滑油中的杂质。进一步地，所述油泵和所述油过滤器之间设置有油冷却器，且该油冷却器与所述后部冷却器共用冷却水进口和冷却水出口。这样，利用油冷却器对输送到无油螺杆压缩主机和齿轮箱中的润滑油进行冷却降温，可进一步提高无油螺杆压缩主机和齿轮箱的冷却降温效果。
Smart Images
Figure CN224903456U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of gas compression technology, and in particular to a dry oil-free booster device. Background Technology
[0002] Currently, oil-free piston compressors or micro-oil screw compressors are commonly used in the market to pressurize low-pressure nitrogen. However, the flow rate of oil-free piston compressors is too small to meet users' requirements for high-pressure nitrogen flow; the high-pressure gas produced by micro-oil screw compressors contains impurities such as water, oil, and air, which cannot meet users' requirements for the purity of high-pressure nitrogen. Utility Model Content
[0003] To ensure that the flow rate and purity of the high-pressure nitrogen produced by pressurization meet user requirements, this invention proposes a dry, oil-free pressurization device. The device includes an oil-free screw compressor, an aftercooler, and a drive motor. A precision filter is installed at the inlet of the oil-free screw compressor, and the outlet of the compressor is connected to the cooling inlet of the aftercooler. The drive motor is connected to the compressor via a gearbox and drives it. This dry, oil-free pressurization device, by installing a precision filter at the inlet of the screw compressor, precisely filters the nitrogen entering the compressor, removing moisture and other impurities. This prevents the high-pressure nitrogen output from the device from containing water, oil, or other impurities, thus ensuring the purity of the nitrogen meets user requirements. In addition, an aftercooler is installed at the rear end of the oilless screw compressor to cool the high-pressure nitrogen gas generated by the oilless screw compressor, making it convenient for users to use directly.
[0004] Preferably, an intake control valve is provided between the precision filter and the oil-free screw compressor. This allows the operator to adjust the intake control valve to regulate the flow rate of nitrogen entering the oil-free screw compressor during operation of the dry oil-free booster device, avoiding waste. Furthermore, an intake pressure sensor and an intake temperature sensor are provided between the precision filter and the intake control valve, and a delivery temperature sensor is provided between the oil-free screw compressor and the aftercooler. This allows the intake flow rate to be adjusted using the intake pressure and temperature sensors to ensure the output high-pressure nitrogen flow rate meets user requirements during operation; and the cooling temperature of the aftercooler can be adjusted using the delivery temperature sensor to prevent the aftercooler temperature from being too high or too low, which could result in the output high-pressure nitrogen temperature not meeting user requirements or even causing energy waste.
[0005] Preferably, the cooling outlet of the aftercooler is provided with an outlet pipe and a return pipe connected to the inlet of the precision filter. A check valve and a pipe silencer are provided on the outlet pipe. The return pipe connects to the outlet pipe between the check valve and the aftercooler, and a return control valve is provided on the return pipe. This invention's dry oil-free booster device delivers compressed high-pressure nitrogen to the user through the check valve and pipe silencer. The check valve prevents the output high-pressure nitrogen from flowing back into the device and causing contamination, while the pipe silencer reduces operating noise. The return pipe connects the outlet pipe and the inlet of the precision filter. When the output high-pressure nitrogen flow exceeds the user's needs, the return control valve on the return pipe can be opened to allow a portion of the output high-pressure nitrogen to be reintroduced into the oil-free screw compressor, preventing waste. Furthermore, a venting silencer is installed on the return gas pipe, and this venting silencer is located between the return gas control valve and the precision filter. Thus, when recovering high-pressure nitrogen using the return gas pipe, the venting silencer can be used to reduce noise during recovery, thereby reducing the operating noise of the dry oil-free booster device of this invention. Furthermore, a safety valve, an outlet gas pressure sensor, and an outlet gas temperature sensor are installed on the outlet gas pipe, with the safety valve located near the cooling outlet of the aftercooler, and the outlet gas pressure sensor and the outlet gas temperature sensor located between the safety valve and the check valve. In this dry oil-free booster device, the outlet gas pressure sensor and outlet gas temperature sensor are installed on the outlet gas pipe to allow the operator to adjust the intake flow of the oil-free screw compressor and the cooling temperature of the aftercooler based on the real-time monitored outlet gas pressure and temperature. Simultaneously, it allows the operator to promptly open the safety valve to reduce pressure when the gas pressure in the outlet gas pipe is too high, improving the operational safety of the dry oil-free booster device of this invention.
[0006] Preferably, the dry oilless booster device includes an oil tank containing a primary oil filter located at the oil outlet. The oil outlet is connected to the oilless screw compressor and gearbox via an oil supply pipe, supplying the stored lubricating oil to these components. The oil return port is also connected to the oilless screw compressor and gearbox via a return pipe, recovering the lubricating oil discharged from these components back into the oil tank. In this way, the lubricating oil stored in the tank, after being filtered by the primary oil filter, enters the oilless screw compressor and gearbox for lubrication and cooling. This prevents impurities from directly entering the oilless screw compressor and gearbox and causing damage, thus extending the service life of the dry oilless booster device. Furthermore, a branch block is provided on the oil supply pipe, and the first oil outlet of the branch block is connected to the oil inlet of the oilless screw compressor through a first oil supply branch pipe, the second oil outlet of the branch block is connected to the oil inlet of the gearbox through a second oil supply branch pipe, and the third oil outlet of the branch block is connected to the return port of the oil tank through a third oil supply branch pipe. Thus, by providing a branch block on the oil supply pipe, the lubricating oil in the oil supply pipe is conveniently transported to the oilless screw compressor through the first oil supply branch pipe, to the gearbox through the second oil supply pipe, and to the oil tank through the third oil supply branch pipe. Therefore, the lubricating oil in the dry oilless booster device of this invention can be distributed to different oil supply branch pipes as needed through the branch block.
[0007] Preferably, an oil pump and an oil filter are installed on the oil pipeline, with the oil filter located between the oil pump and the branch block. This arrangement of the oil pump and oil filter in the dry oilless booster device allows for secondary filtration of the lubricating oil drawn from the oil tank, further removing impurities. Furthermore, an oil cooler is installed between the oil pump and the oil filter, sharing a cooling water inlet and outlet with the aftercooler. This further enhances the cooling effect of the oilless screw compressor and gearbox by cooling the lubricating oil supplied to them. Attached Figure Description
[0008] Figure 1 This is a schematic diagram illustrating the structural principle of the dry oil-free booster device of this utility model. Detailed Implementation
[0009] Below, in conjunction with Figure 1 This utility model provides a detailed description of the dry, oil-free booster device.
[0010] like Figure 1As shown, this utility model of a dry oil-free booster device includes an oil-free screw compressor 1, an aftercooler 2, and a drive motor 3. A precision filter 4 is installed at the air inlet of the oil-free screw compressor 1, and the air outlet of the oil-free screw compressor 1 is connected to the cooling air inlet of the aftercooler 2. The drive motor 3 is connected to the oil-free screw compressor 1 via a gearbox 5 and drives the oil-free screw compressor 1 to operate. This utility model of a dry oil-free booster device, by installing a precision filter 4 at the air inlet of the oil-free screw compressor 1 that compresses and boosts nitrogen, can precisely filter the nitrogen entering the oil-free screw compressor 1, removing impurities such as moisture from the nitrogen. This avoids the high-pressure nitrogen output by this utility model containing impurities such as water and oil, thus ensuring that the purity of the high-pressure nitrogen meets the application requirements. In addition, a post-cooler 2 is installed at the rear end of the oilless screw compressor 1 to cool the high-pressure nitrogen gas generated by the oilless screw compressor 1, making it convenient for direct use by users. Preferably, the drive motor 3 is connected to the gearbox 5 via a coupling, ensuring a stable and convenient connection. Preferably, a permanent magnet synchronous motor is used as the drive motor 3, allowing the dry oilless booster device of this invention to supply gas according to user needs through frequency conversion technology, saving energy. Preferably, an intake control valve 11 is installed between the precision filter 4 and the oilless screw compressor 1. Thus, during the operation of the dry oilless booster device of this invention, the operator can adjust the intake control valve 11 according to the user's gas consumption requirements to regulate the flow rate of nitrogen gas entering the oilless screw compressor 1, avoiding waste. Preferably, the intake control valve 11 can be an electric butterfly valve, which is simple and convenient to control. Preferably, an intake pressure sensor 12 and an intake temperature sensor 13 are installed between the precision filter 4 and the intake control valve 11, and a delivery temperature sensor 14 is installed between the oil-free screw compressor 1 and the aftercooler 2. Thus, during the operation of this dry oil-free booster device, the intake flow rate can be adjusted using the intake pressure sensor 12 and the intake temperature sensor 13 to ensure that the output high-pressure nitrogen flow rate meets the user's requirements; the cooling temperature of the aftercooler 2 can be adjusted according to the delivery temperature sensor 14 to avoid the aftercooler 2 becoming too high or too low, which would result in the output high-pressure nitrogen temperature not meeting the user's requirements, or even causing energy waste. Preferably, the cooling outlet of the aftercooler 2 is provided with an outlet pipe 21 and a return pipe 22 connected to the inlet of the precision filter 4. The outlet pipe 21 is provided with a check valve 211 and a pipe silencer 212. The return pipe 22 is connected to the outlet pipe 21 between the check valve 211 and the aftercooler 2, and a return control valve 221 is provided on the return pipe 22.This utility model's dry oil-free booster device delivers compressed high-pressure nitrogen to the user via a check valve 211 and a pipeline silencer 212. The check valve 211 prevents the output high-pressure nitrogen from flowing back into the device and causing contamination, while the pipeline silencer 212 reduces operating noise. The device features a return gas pipe 22 connecting the outlet pipe 21 and the inlet of the precision filter 4. When the output high-pressure nitrogen flow exceeds the user's needs, the return gas control valve 221 on the return gas pipe 22 can be opened to allow a portion of the output high-pressure nitrogen to be reintroduced into the oil-free screw compressor, preventing waste. Preferably, the return gas control valve 221 can be an electric butterfly valve for simple and convenient control. Preferably, a venting silencer 222 is installed on the return gas pipe 22, located between the return gas control valve 221 and the precision filter 4. Thus, when recovering high-pressure nitrogen using the return pipe 22, the venting silencer 222 can be used to reduce noise during recovery, thereby reducing the operating noise of the dry oil-free booster device of this invention. Preferably, a safety valve 213, an outlet pressure sensor 214, and an outlet temperature sensor 215 are provided on the outlet pipe 21, with the safety valve 213 located near the cooling outlet of the aftercooler 2, and the outlet pressure sensor 214 and outlet temperature sensor 215 located between the safety valve 213 and the check valve 211. In the dry oil-free booster device of this invention, the outlet pressure sensor 214 and outlet temperature sensor 215 are provided on the outlet pipe 21 to allow the operator to adjust the intake flow of the oil-free screw compressor 1 and the cooling temperature of the aftercooler 2 based on the real-time monitored outlet pressure and temperature. Simultaneously, it allows the operator to promptly open the safety valve 213 to reduce pressure when the gas pressure in the outlet pipe is too high, improving the operational safety of the dry oil-free booster device of this invention.
[0011] like Figure 1As shown, the dry oilless booster device of this utility model is equipped with an oil tank 6, which contains a primary oil filter 61 located at the oil outlet of the oil tank 6. The oil outlet of the oil tank 6 is connected to the oilless screw compressor host 1 and the gearbox 5 through an oil supply pipe (not shown in the figure) to supply and deliver the lubricating oil stored in the oil tank 6 to the oilless screw compressor host 1 and the gearbox 5. The oil return port of the oil tank 6 is connected to the oilless screw compressor host 1 and the gearbox 5 through a return pipe (not shown in the figure) to recover the lubricating oil discharged from the oilless screw compressor host 1 and the gearbox 5 back into the oil tank 6. In this way, the lubricating oil stored in the oil tank 6 is filtered by the primary oil filter 61 and then enters the oilless screw compressor 1 and gearbox 5 to lubricate and cool them. This prevents impurities from directly entering the oilless screw compressor 1 and gearbox 5 and causing damage, thus extending the service life of the dry oilless booster device of this invention. Preferably, a branch block 7 is provided on the oil supply pipe. The first oil outlet of the branch block 7 is connected to the oil inlet of the oilless screw compressor 1 through a first oil supply branch pipe, the second oil outlet of the branch block 7 is connected to the oil inlet of the gearbox 5 through a second oil supply branch pipe, and the third oil outlet of the branch block 7 is connected to the oil return port of the oil tank 6 through a third oil supply branch pipe. Thus, by providing the branch block 7 on the oil supply pipe, the lubricating oil in the oil supply pipe is conveniently transported to the oilless screw compressor 1 through the first oil supply branch pipe, to the gearbox 5 through the second oil supply pipe, and to the oil tank 6 through the third oil supply branch pipe. Therefore, the lubricating oil in the dry oilless booster device of this invention can be distributed to different oil supply branches as needed through the branch block 7. Preferably, an oil pump 62 and an oil filter 63 are installed on the oil supply pipe, and the oil filter 63 is located between the oil pump 62 and the branch block 7. In this way, by installing an oil pump 62 and an oil filter 63 in the dry oilless booster device of this invention, the oil filter 63 can perform secondary filtration on the lubricating oil drawn from the oil tank 6 by the oil pump 62, further removing impurities from the lubricating oil. Preferably, an oil cooler 64 is installed between the oil pump 62 and the oil filter 63, and the oil cooler 64 shares a cooling water inlet and a cooling water outlet with the rear cooler 2. In this way, by using the oil cooler 64 to cool and lower the temperature of the lubricating oil delivered to the oilless screw compressor 1 and the gearbox 5, the cooling effect of the oilless screw compressor 1 and the gearbox 5 can be further improved. Preferably, an overflow pipe (not shown in the figure) is connected to the overflow hole on the oil tank 6. The overflow pipe is connected to the oil supply pipe between the oil cooler 64 and the oil pump 62, and an overflow valve 65 is provided on the overflow pipe. In this way, when the oil pump 62 draws out too much lubricating oil, the overflow valve 65 can be opened to allow the excess lubricating oil to flow back into the oil tank 6 through the overflow pipe.
Claims
1. A dry, oil-free booster device, characterized in that, The dry oil-free booster includes an oil-free screw compressor, an aftercooler, and a drive motor. A precision filter is installed at the air inlet of the oil-free screw compressor, and the air outlet of the oil-free screw compressor is connected to the cooling air inlet of the aftercooler. The drive motor is connected to the oil-free screw compressor through a gearbox and drives the oil-free screw compressor to operate through the gearbox.
2. The dry oil-free booster device according to claim 1, characterized in that, An intake control valve is provided between the precision filter and the oil-free screw compressor.
3. The dry oil-free booster device according to claim 2, characterized in that, An intake pressure sensor and an intake temperature sensor are installed between the precision filter and the intake control valve, and a delivery temperature sensor is installed between the oil-free screw compressor and the aftercooler.
4. The dry oil-free booster device according to any one of claims 1-3, characterized in that, The cooling outlet of the aftercooler is provided with an outlet pipe and a return pipe connected to the inlet of the precision filter. The outlet pipe is provided with a check valve and a pipe silencer. The return pipe is connected to the outlet pipe between the check valve and the aftercooler, and a return control valve is provided on the return pipe.
5. The dry oil-free booster device according to claim 4, characterized in that, A venting silencer is installed on the return air pipe, and the venting silencer is located between the return air control valve and the precision filter.
6. The dry oil-free booster device according to claim 4, characterized in that, The outlet pipe is equipped with a safety valve, an outlet pressure sensor, and an outlet temperature sensor. The safety valve is located near the cooling outlet of the rear cooler, and the outlet pressure sensor and the outlet temperature sensor are located between the safety valve and the check valve.
7. The dry oil-free booster device according to any one of claims 1-3, characterized in that, The dry oilless booster device is equipped with an oil tank containing a primary oil filter located at the oil outlet. The oil outlet is connected to the oilless screw compressor and the gearbox via an oil supply pipe, supplying the lubricating oil stored in the oil tank to the oilless screw compressor and the gearbox. The oil return port is connected to the oilless screw compressor and the gearbox via a return pipe, recovering the lubricating oil discharged from the oilless screw compressor and the gearbox back into the oil tank.
8. The dry oil-free booster device according to claim 7, characterized in that, The oil supply pipe is provided with a branch block, and the first oil outlet of the branch block is connected to the oil inlet of the oilless screw compressor through a first oil supply branch pipe. The second oil outlet of the branch block is connected to the oil inlet of the gearbox through a second oil supply branch pipe. The third oil outlet of the branch block is connected to the oil return port of the oil tank through a third oil supply branch pipe.
9. The dry oil-free booster device according to claim 8, characterized in that, The oil pipeline is equipped with an oil pump and an oil filter, and the oil filter is located between the oil pump and the branch block.
10. The dry oil-free booster device according to claim 9, characterized in that, An oil cooler is provided between the oil pump and the oil filter, and the oil cooler shares a cooling water inlet and a cooling water outlet with the rear cooler.