Energy efficiency adjusting structure of micro-oil screw air compressor

Abstract

The utility model provides an energy efficiency adjusting structure of a micro-oil screw air compressor. The energy efficiency adjusting structure of the micro-oil screw air compressor comprises a first-stage screw air compression main machine, a second-stage screw air compression main machine, an oil barrel and an oil cooler. An inlet of the oil cooler is connected to an outlet of the oil barrel, and an outlet of the oil cooler is connected to the first-stage screw air compression main machine and an oil spraying opening of the first-stage screw air compression main machine through an oil filter, a flow meter and a ball valve. And the secondary screw air compression main engine is connected to an inlet of the oil drum.

Description

Technical Field

[0001] The utility model relates to an energy efficiency regulating structure of a micro-oil screw air compressor. Background Art

[0002] As market competition becomes increasingly fierce, customer demands are also increasing. Customers are paying more and more attention to the energy efficiency and cost of air compressors. It becomes particularly important to adjust the energy efficiency of the entire machine to the best state when the host performance has reached the best.

[0003] The existing technology mainly reduces the pressure loss of the whole machine, thereby reducing the work of the whole machine and reducing the power to improve energy efficiency. The existing technology can also adjust the main engine clearance to increase the displacement and reduce the specific power.

[0004] The above two methods have problems with cost and implementation effect. Reducing the pressure loss of the whole machine means using low-loss parts, which will greatly increase the cost, and the service life of many low-loss parts will also be greatly reduced. As for the second method, the implementation effect may not be ideal, and changing the gap is prone to friction risks. Utility Model Content

[0005] The main technical problem to be solved by the utility model is to provide an energy efficiency adjustment structure for a micro-oil screw air compressor, which is convenient to operate and easy to realize.

[0006] In order to solve the above technical problems, the utility model provides an energy efficiency adjustment structure of a micro-oil screw air compressor, comprising: a primary screw air compressor host, a secondary screw air compressor host, an oil barrel and an oil cooler;

[0007] The inlet of the oil cooler is connected to the outlet of the oil barrel, and the outlet of the oil cooler is connected to the first-stage screw air compressor host and the oil injection port of the first-stage screw air compressor host through an oil filter, a flow meter, and a ball valve; the second-stage screw air compressor host is connected to the inlet of the oil barrel.

[0008] In a preferred embodiment: the flow meter is connected in series to the outlet end of the ball valve.

[0009] In a preferred embodiment: the ball valve is an electric ball valve.

[0010] Compared with the prior art, the technical solution of the utility model has the following beneficial effects:

[0011] The utility model provides an energy efficiency adjustment structure for a micro-oil screw air compressor, which adjusts the energy efficiency of the whole machine by adjusting the oil injection amount of the main machine. The adjustment of the oil injection amount of the main machine will not significantly increase the cost, and the operation is convenient, easy to implement, and the effect is relatively ideal. The principle is to reduce the circulating oil amount of the main machine in the oil return cooling system of the whole machine, increase the clearance volume in the cavity, and minimize the work other than the gas compression work of the main machine while ensuring that the operating state of the whole machine is qualified and stable, thereby reducing power, optimizing displacement, and optimizing specific power. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is the oil circuit diagram of the preferred embodiment of the utility model. DETAILED DESCRIPTION

[0013] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model; it is obvious that the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the utility model without making creative work are within the scope of protection of the utility model.

[0014] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships described in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0015] In the description of the present utility model, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installed", "provided with", "installed / connected", "connected", etc. should be understood in a broad sense. For example, "connection" can be a wall-mounted connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be a direct connection or an indirect connection through an intermediate medium. It can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to specific circumstances.

[0016] refer to Figure 1 , this embodiment provides an energy efficiency adjustment structure of a micro-oil screw air compressor, including: a primary screw air compressor main unit 1, a secondary screw air compressor main unit 2, an oil barrel 3 and an oil cooler 4;

[0017] The inlet of the oil cooler 4 is connected to the outlet of the oil barrel 3, and the outlet of the oil cooler 4 is connected to the first-stage screw air compressor host 1 and the oil injection port 8 of the first-stage screw air compressor host 1 through the oil filter 5, the flow meter 6, and the ball valve 7; the second-stage screw air compressor host 2 is connected to the inlet of the oil barrel 3.

[0018] In this embodiment, a ball valve 7 and a flow meter 6 are installed at the connection between the return oil pipeline and the main engine, and the main engine oil injection amount is tested and adjusted by changing the size of the inlet end cross-section, and the reading of the flow meter 6 is observed. After the specific power is adjusted to the optimal state, it is observed whether the operation of the whole machine can meet the long-term operation requirements; the optimal pipe diameter channel is selected according to the formula based on the observed flow conditions.

[0019] Specifically, the ball valve 7 is installed to the rear end of the flow meter 6, the opening of the ball valve 7 is adjusted, the flow meter 6 reading and energy efficiency changes are observed, and the optimal flow rate is confirmed; if the flow meter 6 uses a full-tube flow meter 6, the ball valve 7 must be adjusted to the outlet end of the flow meter 6 to ensure measurement accuracy, and the installation of the flow meter 6 must meet the installation requirements.

[0020] After reading the best reading of flow meter 6, according to the principle of fluid mechanics, because they are in the same system, the external force source is the same, and the pipe loss can be ignored. According to the principle of fluid mechanics, the total head height before and after is constant, so there is formula 1;

[0021]

[0022] Note: Z—position head, indicating unit weight of fluid; —Pressure head, which indicates the energy that the cross-sectional pressure can provide to a unit weight of fluid; —Flow rate head, which expresses the kinetic energy possessed by a unit weight of fluid;

[0023] The measured flow rate can be read as Q in the flow meter 6 reading, and V1 can be obtained according to formula 2;

[0024] Q=V1A1 Formula 2

[0025] Under certain conditions of the system, we can take the position head and pressure head as constant, and then Formula 1 is simplified to;

[0026]

[0027] hw—local loss due to expansion or contraction of the pipeline;

[0028]

[0029] When the original pipe diameter A1 is known, A2 can be calculated;

[0030] In this embodiment, the ball valve 7 is an electric ball valve 7. The electric ball valve 7 is used to replace the conventional ball valve 7, and the throttling is achieved by electric adjustment through the control program.

[0031] The energy efficiency adjustment structure of the above-mentioned micro-oil screw air compressor adjusts the energy efficiency of the whole machine by adjusting the oil injection amount of the main engine. Adjusting the oil injection amount of the main engine will not significantly increase the cost, and the operation is convenient, easy to implement, and the effect is relatively ideal. The principle is to reduce the circulating oil volume of the main engine in the oil return cooling system of the whole machine, increase the clearance volume in the cavity, and minimize the work other than the gas compression work of the main engine while ensuring that the operation state of the whole machine is qualified and stable, thereby reducing power, optimizing displacement, and optimizing specific power.

[0032] The above is only a preferred specific implementation method of the utility model, but the design concept of the utility model is not limited to this. Any technician familiar with the technical field who uses this concept to make non-substantial changes to the utility model within the technical scope disclosed by the utility model shall be deemed to infringe the protection scope of the utility model.

Claims

1. An energy efficiency adjustment structure for a micro-oil screw air compressor, characterized in that include: Primary screw air compressor, secondary screw air compressor, oil drum and oil cooler; The inlet of the oil cooler is connected to the outlet of the oil barrel, and the outlet of the oil cooler is connected to the first-stage screw air compressor host and the oil injection port of the first-stage screw air compressor host through an oil filter, a flow meter, and a ball valve; the second-stage screw air compressor host is connected to the inlet of the oil barrel.

2. The energy efficiency adjustment structure of a micro-oil screw air compressor according to claim 1 is characterized in that: The flow meter is connected in series to the outlet end of the ball valve.

3. The energy efficiency adjustment structure of a micro-oil screw air compressor according to claim 1 is characterized in that: The ball valve is an electric ball valve.

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