Urban natural gas vortex booster unit
By designing a scroll booster unit, a scroll compressor designed with polyether ether ketone material packaging and an eccentric shaft, combined with frequency conversion control, the problem of high energy consumption of small-displacement natural gas booster conveying is solved, achieving efficient and stable booster conveying and reducing equipment costs.
Patent Information
- Application Number
- CN202510737820.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-04
- Publication Date
- 2025-08-15
AI Technical Summary
In the prior art, there is a lack of equipment suitable for small-displacement natural gas boosting transmission on the market, resulting in high energy consumption and scroll compressors cannot be suitable for natural gas boosting conditions.
A urban natural gas scroll booster unit is designed, including a scroll compressor, oil separator, oil cooler and unit frequency conversion starter. It uses polyether ether ketone material to encapsulate insulated channels, eccentric shaft design and frequency conversion control to ensure that the compressor operates efficiently under small displacement conditions and reduces energy consumption through closed lubrication cycles.
It realizes efficient boosting of small-displacement natural gas transmission, reduces energy consumption, extends equipment life, improves transportation stability and economy, and meets flexible adjustments to meet different gas needs.
Smart Images
Figure CN120487601A_ABST
Abstract
Description
Technical Field
[0001] The present invention belongs to the technical field of natural gas vortex supercharging, and in particular relates to a city natural gas vortex supercharging unit. Background Art
[0002] Currently, relatively clean, purified urban natural gas is typically delivered to gas users via compressors. Commercially available compressor units for boosting natural gas include screw and piston boosters, which typically have large intake capacities. However, for relatively small natural gas intake capacities of 50-120 m³ / h, with intake pressures between 0 and 1.7 bar.G and discharge pressures between 4 and 13.1 bar.G, there is no suitable natural gas boosting and delivery equipment on the market. This requires piston or screw units, which are typically used in a horse-drawn-cart fashion, resulting in high energy consumption.
[0003] Due to its small size, the scroll compressor's suction and displacement capacity can just make up for the shortcomings of piston and screw compressors. The scroll compressors on the market are mainly refrigeration compressors and cannot be used in the working conditions of natural gas boosting and transportation. Summary of the Invention
[0004] The present invention aims to provide a city natural gas vortex supercharging unit, which realizes on-demand pressurized transportation of city natural gas within the above-mentioned operating conditions and solves the problem of high energy consumption in the small displacement field.
[0005] In order to achieve the above functions, the technical solution adopted by the present invention is as follows: a city natural gas scroll booster unit, including a scroll compressor, an oil separator, an oil cooler and a unit variable frequency starting cabinet. A natural gas insulation channel is set inside the scroll compressor, the oil separator is connected to the exhaust port of the scroll compressor, and the separated natural gas is output through the outlet pipeline. The oil cooler is connected to the oil separator and the scroll compressor through an oil circuit to form a closed lubrication cycle.
[0006] Preferably, the scroll compressor is frequency-controlled by a frequency conversion starting cabinet of the unit and is steplessly adjusted according to the needs of the user.
[0007] Preferably, the natural gas insulation channel is packaged with polyetheretherketone material.
[0008] Preferably, the windings and stator of the scroll compressor are packaged with insulating materials to ensure that the compressor can adapt to the medium of natural gas.
[0009] Preferably, the natural gas insulation channel is provided along the winding of the scroll compressor, so that the inlet natural gas flows through the winding to remove the heat of the rotor.
[0010] Preferably, the scroll compressor shaft adopts an eccentric shaft design, and a radial oil hole is opened at the axis of the eccentric shaft, and the lubricating oil is transported to the bearing through centrifugal force.
[0011] The present invention adopts the above structure to achieve the following beneficial effects:
[0012] 1. This city natural gas scroll booster unit is designed for small-displacement natural gas transportation conditions. The exhaust volume of the scroll compressor is highly matched with this working condition. Compared with screw and piston units, the efficiency is significantly improved under small flow conditions. Using this unit for natural gas boosting and transportation can effectively reduce energy consumption and save long-term operating costs for users.
[0013] 2. Natural gas compatibility design of the scroll compressor ensures stable operation under natural gas boosting conditions. Special insulation material packaging ensures that the compressor windings and stator adapt to the natural gas medium, avoiding electrical failures. The natural gas insulation channel uses the inlet low-temperature natural gas to remove rotor heat, improving heat dissipation efficiency. The internal oil circuit of the eccentric shaft design uses centrifugal force to achieve automatic lubrication of the bearings, reducing mechanical wear and extending the service life of the equipment.
[0014] 3. The unit adopts variable frequency control, which can steplessly adjust the compressor speed according to changes in user natural gas demand, and respond quickly and accurately to user load fluctuations. This flexible adjustment method can maintain stable gas supply pressure and flow, improve the stability and reliability of natural gas transportation, and meet the gas needs of different users at different times.
[0015] 4. The scroll compressor is small in size, making the entire booster unit compact. Compared with screw and piston units, the cost of equipment manufacturing, installation and floor space is lower. In the field of small-displacement natural gas transportation, users can use this scroll booster unit to not only obtain efficient and stable boosting and transportation effects, but also significantly reduce the initial equipment investment cost, with a high economic cost performance. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 Schematic diagram of the overall structure of an embodiment of the present invention;
[0017] Figure 2 Schematic diagram of the stator structure of the scroll supercharger according to an embodiment of the present invention;
[0018] Figure 3 Schematic diagram of the rotor structure of a scroll supercharger according to an embodiment of the present invention;
[0019] Figure 4 A side view of the main shaft of the scroll supercharger according to an embodiment of the present invention;
[0020] Figure 5 This is a cross-sectional view of a scroll supercharger according to an embodiment of the present invention.
[0021] Among them, 1. Scroll compressor, 2. Oil separator, 3. Oil cooler, 4. Unit frequency conversion starting cabinet. DETAILED DESCRIPTION
[0022] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.
[0023] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.
[0024] like Figure 1-5 As shown, the present invention proposes a city natural gas scroll booster unit, including a scroll compressor 1, an oil separator 2, an oil cooler 3 and a unit frequency conversion starting cabinet 4. A natural gas insulation channel is set inside the scroll compressor 1, and the natural gas insulation channel is encapsulated with polyetheretherketone material. The natural gas insulation channel is set along the winding of the scroll compressor 1, so that the inlet natural gas flows through the winding to take away the heat of the rotor. The shaft of the scroll compressor 1 adopts an eccentric shaft design, and a radial oil hole is opened at the axis of the eccentric shaft. The lubricating oil is transported to the bearing by centrifugal force. The oil separator 2 is connected to the exhaust port of the scroll compressor 1, and the separated natural gas is output through the outlet pipeline. The oil cooler 3 is connected to the oil separator 2 and the scroll compressor 1 through an oil circuit to form a closed lubrication cycle. The scroll compressor 1 is frequency-controlled by the unit frequency conversion starting cabinet 4 and is steplessly adjusted according to the user's needs. The winding and stator of the scroll compressor 1 are encapsulated with insulating material to ensure that the compressor can adapt to the medium of natural gas.
[0025] During specific use, clean city natural gas enters from the air intake of the scroll compressor 1 and flows along the specially designed channel inside the scroll compressor 1. When passing through the winding of the scroll compressor 1, it uses its own low temperature to take away the heat generated by the rotor to cool the scroll compressor 1. Then it enters the cavity of the scroll movable and static scroll disks. Under the power of the scroll movable scroll disk, the natural gas in the cavity is squeezed and changed from a low-temperature and low-pressure state to a high-temperature and high-pressure state. Finally, it is discharged from the scroll compressor 1 through the exhaust port. The high-temperature and high-pressure natural gas discharged from the scroll compressor 1 enters the oil separator 2 through the exhaust pipeline, and the oil and gas separation operation is performed in the oil separator 2. The clean natural gas after separation is transported to the user end along the gas supply pipeline to meet the user's gas needs.
[0026] The separated high-temperature and high-pressure lubricating oil accumulates in the oil storage tank of the oil separator 2. Under the action of the pressure difference, it enters the oil cooler 3 along the oil supply pipeline for cooling treatment. The cooled lubricating oil is then supplied to the scroll compressor 1. The internal oil circuit adopts an eccentric crankshaft design, and the lubricating oil is supplied to the bearings through centrifugal action.
[0027] During unit operation, the compressor speed is adjusted by the unit's variable frequency starter 4 based on the user's actual natural gas demand. When the user load increases, the compressor speed is increased to increase the exhaust volume; when the user load decreases, the compressor speed is reduced to reduce the exhaust volume.
[0028] The present invention and its embodiments are described above. This description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if a person skilled in the art is inspired by this and, without departing from the purpose of the present invention, designs structures and embodiments similar to this technical solution without inventiveness, they shall fall within the scope of protection of the present invention.
Claims
1. A city natural gas scroll supercharger unit, characterized by: The invention comprises a scroll compressor (1), an oil separator (2), an oil cooler (3) and a unit frequency conversion starting cabinet (4); a natural gas insulating channel is provided inside the scroll compressor (1); the oil separator (2) is connected to the exhaust port of the scroll compressor (1); the separated natural gas is output through an outlet pipeline; the oil cooler (3) is connected to the oil separator (2) and the scroll compressor (1) through an oil circuit, thereby forming a closed lubrication cycle.
2. The city natural gas scroll supercharger unit according to claim 1, characterized in that: The scroll compressor (1) is frequency-controlled by a unit frequency-conversion starting cabinet (4).
3. The city natural gas scroll supercharger unit according to claim 2, characterized in that: The natural gas insulation channel is packaged with polyetheretherketone material.
4. The city natural gas scroll supercharger unit according to claim 3, characterized in that: The windings and stator of the scroll compressor (1) are encapsulated with insulating materials and are suitable for the medium of natural gas.
5. The city natural gas scroll supercharger unit according to claim 4, characterized in that: The natural gas insulation channel is arranged along the winding of the scroll compressor (1) to remove heat from the rotor.
6. The city natural gas scroll supercharger unit according to claim 5, characterized in that: The scroll compressor (1) shaft adopts an eccentric shaft design, and a radial oil hole is provided at the center of the eccentric shaft, and the lubricating oil is transported to the bearing by centrifugal force.