Air compression device

Abstract

The utility model discloses an air compression device, and relates to the field of compressors. The air compression device comprises a crankcase, a lubricating oil pump and an external oil way, the lubricating oil pump and the external oil way are located outside the crankcase, and the lubricating oil pump is connected into a lubricating oil way of the crankcase through the external oil way to form a circulation loop for circulating flowing of lubricating oil. The lubricating oil supply pressure of the air compression device is not affected by the rotating speed of the crankcase, the rotating speed of the crankcase is adjustable, different output requirements can be met, and energy waste is avoided.

Description

Technical Field

[0001] The utility model relates to the field of compressors, and in particular to an air compression device. Background Art

[0002] Currently, in commercially available air compressors, the main motor is connected to the crankshaft assembly in the crankcase, serving as the crankcase's power source. A pumping mechanism is located within the crankcase, connected to the crankcase's lubricating oil circuit and connected to the main motor via an intermediate transmission gear. Driven by the main motor, the pumping mechanism pumps the lubricating oil circuit, circulating the lubricating oil within the circuit.

[0003] In actual applications, this type of air compression device requires a constant speed of the main motor to ensure stable oil supply pressure, which makes it difficult to meet different output requirements and easily leads to energy waste. Utility Model Content

[0004] The purpose of the utility model is to provide an air compression device, the oil supply pressure of the crankcase lubricating oil circuit of which is not affected by the crankcase speed, the crankcase speed is adjustable, different output requirements can be met, and energy waste is avoided.

[0005] The utility model provides a technical solution:

[0006] An air compression device includes a crankcase, a lubricating oil pump and an external oil circuit. The lubricating oil pump and the external oil circuit are located outside the crankcase, and the lubricating oil pump is connected to the lubricating oil circuit of the crankcase through the external oil circuit to form a circulation loop for circulating lubricating oil.

[0007] In an optional embodiment, a temperature control valve and a radiator are provided on the external oil circuit, and the temperature control valve is used to control at least part of the lubricating oil to flow through the radiator when the lubricating oil in the circulation loop reaches a temperature threshold.

[0008] In an optional embodiment, a bypass branch section and a heat dissipation branch section are arranged in parallel between the two ends of the external oil circuit, and the radiator is arranged on the heat dissipation branch section; the output ends of the bypass branch section and the heat dissipation branch section are both connected to the temperature control valve, and the temperature control valve is used to control the conduction of the heat dissipation branch section when the lubricating oil reaches the temperature threshold.

[0009] In an optional embodiment, the lubricating oil circuit of the crankcase includes a crankshaft oil circuit and a stage cylinder oil circuit, the output end of the external oil circuit is connected to the input end of the crankshaft oil circuit and the stage cylinder oil circuit, and the input end of the external oil circuit is connected to the output end of the crankshaft oil circuit and the stage cylinder oil circuit.

[0010] In an optional embodiment, the air compression device also includes a three-way joint, the output end of the external oil circuit is connected to the first interface of the three-way joint, the second interface of the three-way joint is connected to the input end of the crankshaft oil circuit, and the third interface of the three-way joint is connected to the input end of the cylinder oil circuit.

[0011] In an optional embodiment, a filtering device is provided on the external oil circuit for filtering the lubricating oil flowing therethrough.

[0012] In an optional embodiment, the filtering device is arranged at the output end of the external oil circuit.

[0013] In an optional embodiment, the air compression device includes a base, and the crankcase and the lubricating oil pump are both arranged on the base.

[0014] In an optional embodiment, the air compression device further includes a variable frequency main motor, which is drivingly connected to the crankcase.

[0015] In an optional embodiment, the lubricating oil pump is equipped with a fixed-frequency motor.

[0016] Compared to existing technologies, the air compression device provided by the present invention features an independently operated lubricating oil pump installed outside the crankcase. This pump is connected to the crankcase's lubricating oil circuit via an external oil circuit, forming a circulation loop for the circulation of lubricating oil. In practical applications, regardless of how the speed of the main motor and crankshaft assembly changes, the operating state of the lubricating oil pump remains unchanged. In other words, the lubricating oil supply pressure remains stable, resulting in excellent lubrication. Therefore, the beneficial effects of the air compression device provided by the present invention include: the lubricating oil supply pressure is unaffected by the crankcase speed, the crankcase speed is adjustable, and different output requirements can be met, thus avoiding energy waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and should not be considered as limiting the scope of the present invention. Those skilled in the art can also derive other relevant drawings based on these drawings without inventive effort.

[0018] Figure 1 A schematic structural diagram of an air compression device provided in an embodiment of the present utility model;

[0019] Figure 2 for Figure 1 A magnified schematic diagram of area A in the middle.

[0020] Icons: 100-air compression device; 110-crankcase; 120-lubricating oil pump; 130-external oil circuit; 131-bypass branch section; 132-heat dissipation branch section; 1321-oil inlet connector; 1322-oil outlet connector; 140-temperature control valve; 150-tee connector; 160-filter device; 170-base; 180-frequency conversion main motor. DETAILED DESCRIPTION

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more apparent, the technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings of the embodiments of the present invention. It should be understood that the described embodiments are only a portion of the embodiments of the present invention, not all of them. Generally, the components of the embodiments of the present invention described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0023] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0024] In the description of the present utility model, it should be understood that the terms "upper", "lower", "inside", "outside", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are directions or positional relationships in which the utility model product is usually placed when in use, or are directions or positional relationships commonly understood by those skilled in the art. These directions or positional relationships are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present utility model.

[0025] Furthermore, the terms “first”, “second”, etc. are merely used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0026] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, terms such as "disposed" and "connected" should be understood in a broad sense. For example, "connected" can mean a fixed 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, or it can be the internal communication between two components. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0027] The specific implementation of the present invention is described in detail below with reference to the accompanying drawings.

[0028] Example

[0029] Please refer to Figure 1 and Figure 2 , Figure 1 FIG. 1 is a schematic structural diagram of the air compressing device 100 provided in this embodiment. Figure 2 Shown Figure 1 A magnified schematic diagram of area A in the middle.

[0030] The air compression device 100 provided in this embodiment includes a crankcase 110, a lubricating oil pump 120, an external oil circuit 130 and a variable frequency main motor 180. The variable frequency main motor 180 is transmission-connected to the crankcase 110, the lubricating oil pump 120 and the external oil circuit 130 are located outside the crankcase 110, and the lubricating oil pump 120 is connected to the lubricating oil circuit of the crankcase 110 through the external oil circuit 130, forming a circulation loop for the circulation of lubricating oil.

[0031] The lubricating oil pump 120 operates independently, powered by a fixed-frequency motor. It has no transmission relationship with the crankshaft assembly of the crankcase 110 or the variable-frequency main motor 180. Therefore, in practical applications, the variable-frequency main motor 180 can adjust its output speed based on actual output needs, meeting output requirements while avoiding energy waste. The independent operation of the lubricating oil pump 120 ensures stable oil supply pressure in the lubrication oil circuit, thereby achieving reliable lubrication.

[0032] Furthermore, it can be understood that, compared with the prior art in which the pumping mechanism is arranged inside the crankcase 110, the lubricating oil pump 120 and the external oil circuit 130 in this embodiment are arranged outside the crankcase 110, which can make it more convenient to maintain and repair the lubricating oil pump 120 and the external oil circuit 130, thereby extending the service life of the air compression device 100.

[0033] The air compression device 100 provided in this embodiment further includes a base 170, on which the crankcase 110 and the lubricating oil pump 120 are both mounted. In this embodiment, the lubricating oil pump 120 is not directly connected to the crankcase 110. In other embodiments, depending on actual application conditions, the lubricating oil pump 120 may be directly mounted on the outer casing of the crankcase 110.

[0034] In actual applications, there is a situation where the temperature of the lubricating oil is too high due to excessive output power. In order to maintain good lubrication and heat dissipation effects, in this embodiment, a temperature control valve 140 and a radiator (not shown in the figure) are provided on the external oil circuit 130. The temperature control valve 140 is used to control at least part of the lubricating oil to flow through the radiator when the lubricating oil in the circulation loop reaches a temperature threshold.

[0035] It will be appreciated that the radiator actively dissipates heat from the lubricating oil flowing through it. When the lubricating oil in the circulating loop becomes too hot, the control valve directs the lubricating oil in the circulating loop to flow through the radiator, actively dissipating the high-temperature lubricating oil and rapidly cooling it to a suitable temperature before flowing into the lubricating oil circuit of crankcase 110.

[0036] In actual applications, the temperature control valve 140 can obtain the ability to detect oil temperature through the dust collection temperature detection module, or an independent temperature detection device can be set on the external oil circuit 130, and the detection results of the temperature detection device can be used as the basis for controlling the state switching of the temperature control valve 140.

[0037] Specifically, in this embodiment, a bypass branch section 131 and a heat dissipation branch section 132 are provided in parallel between the two ends of the external oil circuit 130, and a radiator is provided on the heat dissipation branch section 132. The output ends of the bypass branch section 131 and the heat dissipation branch section 132 are both connected to a temperature control valve 140, which is used to control the conduction of the heat dissipation branch section 132 when the lubricating oil reaches a temperature threshold.

[0038] In practice, the heat sink is connected to Figure 2 Between the oil inlet connector 1321 and the oil outlet connector 1322 in the external oil circuit 130. In actual application, when the temperature of the lubricating oil in the circulation loop is below the set temperature threshold, the lubricating oil pump 120 operates, and the lubricating oil it outputs flows only into the lubricating oil circuit of the crankcase 110 through the bypass branch section 131 and the temperature control valve 140. The lubricating oil travels a very short distance in the external oil circuit 130, which can ensure oil supply efficiency.

[0039] When the lubricating oil temperature in the circulation loop exceeds a set threshold, the surface oil temperature becomes excessively high and requires active heat dissipation. At this point, thermostatic valve 140 switches its operating state, disconnecting bypass branch 131 and connecting heat dissipation branch 132. Lubricating oil pump 120 flows exclusively through heat dissipation branch 132 and thermostatic valve 140 into the lubricating oil circuit of crankcase 110. While flowing through heat dissipation branch 132, the radiator actively dissipates heat from the lubricating oil, allowing it to enter the lubricating oil circuit of crankcase 110 at a suitable temperature, thereby achieving stable and reliable lubrication and heat dissipation.

[0040] It should be noted that in another embodiment, by selecting the right type of temperature control valve 140, it is possible to control the bypass branch section 131 and the heat dissipation branch section 132 to be opened simultaneously. For example, when the temperature of the lubricating oil in the circulation loop rises to a certain level but before reaching a preset temperature threshold, the temperature control valve 140 will simultaneously open the bypass branch section 131 and the heat dissipation branch section 132, so that only a portion of the lubricating oil output by the lubricating oil pump 120 flows through the radiator for heat dissipation.

[0041] In fact, the lubricating oil circuit of the crankcase 110 includes a crankshaft oil circuit and a stage cylinder oil circuit. The output end of the external oil circuit 130 is connected to the input end of the crankshaft oil circuit and the stage cylinder oil circuit, and the input end of the external oil circuit 130 is connected to the output end of the crankshaft oil circuit and the stage cylinder oil circuit.

[0042] Specifically, the air compression device 100 also includes a three-way joint 150, the output end of the external oil circuit 130 is connected to the first interface of the three-way joint 150, the second interface of the three-way joint 150 is connected to the input end of the crankshaft oil circuit, and the third interface of the three-way joint 150 is connected to the input end of the cylinder oil circuit.

[0043] As will be understood, the lubricating oil output from external oil circuit 130 is split at T-joint 150. A portion enters the crankshaft oil circuit through the second port to lubricate and dissipate heat for the crankshaft structures. The remaining portion enters the cylinder oil circuit through the third port to lubricate and dissipate heat for each stage of the compression cylinders. The lubricating oil output from the crankshaft oil circuit and the cylinder oil circuit rejoins at the input end of external oil circuit 130 and flows back into the lubricating oil pump 120, completing the circulation.

[0044] In order to ensure the purity of the lubricating oil input into the crankcase 110, in this embodiment, a filtering device 160 is provided on the external oil circuit 130 for filtering the lubricating oil flowing therethrough. Preferably, the filtering device 160 is provided at the output end of the external oil circuit 130 and upstream of the three-way joint 150.

[0045] In summary, the air compression device 100 provided in this embodiment provides stable and reliable lubrication and heat dissipation, with the lubricating oil supply pressure to the crankcase 110 being unaffected by the rotational speed of the crankcase 110 or the variable-frequency main motor 180. Furthermore, the crankcase 110 rotational speed is adjustable, meeting various output requirements and avoiding energy waste.

[0046] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. An air compression device, characterized in that: The invention comprises a crankcase (110), a lubricating oil pump (120) and an external oil circuit (130), wherein the lubricating oil pump (120) and the external oil circuit (130) are located outside the crankcase (110), and the lubricating oil pump (120) is connected to the lubricating oil circuit of the crankcase (110) through the external oil circuit (130), forming a circulation loop for circulating lubricating oil; The external oil circuit (130) is provided with a temperature control valve (140) and a radiator, and the temperature control valve (140) is used to control at least part of the lubricating oil to flow through the radiator when the lubricating oil in the circulation loop reaches a temperature threshold; A bypass branch section (131) and a heat dissipation branch section (132) are provided in parallel between the two ends of the external oil circuit (130), and the radiator is provided on the heat dissipation branch section (132); the output ends of the bypass branch section (131) and the heat dissipation branch section (132) are both connected to the temperature control valve (140), and the temperature control valve (140) is used to control the heat dissipation branch section (132) to be conductive when the lubricating oil reaches the temperature threshold.

2. The air compression device according to claim 1, characterized in that The lubricating oil circuit of the crankcase (110) includes a crankshaft oil circuit and a stage cylinder oil circuit, the output end of the external oil circuit (130) is in communication with the input ends of the crankshaft oil circuit and the stage cylinder oil circuit, and the input end of the external oil circuit (130) is in communication with the output ends of the crankshaft oil circuit and the stage cylinder oil circuit.

3. The air compression device according to claim 2, characterized in that The air compression device (100) further comprises a three-way joint (150), wherein the output end of the external oil circuit (130) is communicated with a first interface of the three-way joint (150), the second interface of the three-way joint (150) is communicated with an input end of the crankshaft oil circuit, and the third interface of the three-way joint (150) is communicated with an input end of the stage cylinder oil circuit.

4. The air compression device according to claim 1, characterized in that The external oil circuit (130) is provided with a filtering device (160) for filtering the lubricating oil flowing through it.

5. The air compression device according to claim 4, characterized in that: The filtering device (160) is arranged at the output end of the external oil circuit (130).

6. The air compressing device according to claim 1, characterized in that: The air compression device (100) comprises a base (170), and the crankcase (110) and the lubricating oil pump (120) are both arranged on the base (170).

7. The air compression device according to claim 1, characterized in that The air compression device (100) further comprises a variable frequency main motor (180), and the variable frequency main motor (180) is drivingly connected to the crankcase (110).

8. The air compression device according to claim 1, characterized in that The lubricating oil pump (120) is equipped with a fixed-frequency motor.

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