Air compressor and exhaust temperature reduction method of an efficient cooling system

Abstract

The present invention discloses an air compressor of an efficient cooling system, which includes a cylinder head, a valve seat plate, and a cylinder block. The valve seat plate is installed between the cylinder head and the cylinder block. The valve seat plate is also provided with a hollow inner water tank, and a first air inlet hole and a second air inlet hole are arranged at intervals along a fan-shaped arc surface on its lower side. A first exhaust cavity surface, a second exhaust cavity surface, and a bolt connection surface are provided on the upper side of the valve seat plate. The bolt connection surface is arranged between the first exhaust cavity surface and the second exhaust cavity surface, and water passing gaps are respectively formed between the bolt connection surface and the first exhaust cavity surface and the second exhaust cavity surface. A partition rib is connected between the fan-shaped arc surface where the first air inlet hole is located and the bolt connection surface, so that the bolt connection surface, the partition rib, and the fan-shaped arc surface of the first air inlet hole divide the inner water tank into a water inlet cavity and a water return cavity, and the two are not communicated with each other. The present invention has the advantages of remarkable cooling effect of the exhaust cavity and small air resistance of the water channel.

Description

Technical Field

[0001] The present invention relates to the technical field of air compressors, and particularly to an air compressor with an efficient cooling system and a method for discharging and reducing temperature. Background Art

[0002] A certain engine is matched with a double-cylinder air pump. The water inlet of the air compressor is from the front-end hole of the air compressor flange, and the water outlet is from the rear-end hole of the air compressor (air compressor). At the same time, the water filter seat also returns water from the rear-end water outlet of the air compressor. Market feedback shows that the failure rate of this air compressor is relatively high, mainly manifested as oil leakage in the air compressor. During disassembly and inspection, it is found that the air outlet cavity of the cylinder head has a phenomenon of high-temperature burning and yellowing, and the air outlet valve plate and the piston top are severely carbonized. It is verified that the exhaust temperature of this air compressor is relatively high, reaching about 225 °C. Through CAE analysis, it is known that although the water flow rate meets the required requirements, from the perspective of the water jacket structure of the air compressor, multiple isolated high-position areas ( Figure 1 the positions circled in the figure) are formed, which are prone to bubble accumulation, increasing air resistance, reducing water flow rate, and affecting heat exchange. From the CFD calculation results of the air compressor, the flow velocity in the isolated high-position area is low, and the heat transfer coefficient is low. Therefore, it is necessary to optimize this water jacket structure to connect the isolated high positions and improve gas removal.

[0003] For example, for the valve seat plate water channel structure disclosed in the existing patent document CN201650678U, the contact area between the periphery of the exhaust cavity and the coolant is small, and the cooling effect is insufficient to meet the existing technical requirements.

[0004] The disclosure of the above background art content is only used to assist in understanding the concept and technical solution of the present invention, and it does not necessarily belong to the prior art of this patent application. Without clear evidence indicating that the above content was publicly available on the filing date of this patent application, the above background art should not be used to evaluate the novelty and inventiveness of this application. Summary of the Invention

[0005] The object of the present invention is to provide an air compressor with an efficient cooling system that reduces air resistance and has good cooling effect on the exhaust cavity, and a method for discharging and reducing temperature.

[0006] To this end, the present invention provides an air compressor with an efficient cooling system and a method for discharging and reducing temperature.

[0007] Preferably, the present invention may further have the following technical features:

[0008] An air compressor for an efficient cooling system, comprising a cylinder head, a valve seat plate, and a cylinder block. The valve seat plate is installed between the cylinder head and the cylinder block. The valve seat plate is also provided with a hollow inner water tank, and the first air inlet hole and the second air inlet hole are arranged at intervals along the fan-shaped arc surface on its lower side. The upper side of the valve seat plate is provided with a first exhaust cavity surface, a second exhaust cavity surface, and a bolt connection surface. The bolt connection surface is arranged between the first exhaust cavity surface and the second exhaust cavity surface, and water passing gaps are respectively formed between the bolt connection surface and the first exhaust cavity surface and the second exhaust cavity surface. The fan-shaped arc surface where the first air inlet hole is located is connected to the bolt connection surface through a partition rib, so that the bolt connection surface, the partition rib, and the fan-shaped arc surface of the first air inlet hole divide the inner water tank into a water inlet cavity and a water return cavity, and the two are not connected to each other.

[0009] Further, the first exhaust cavity surface and the second exhaust cavity surface are respectively connected by reinforcing ribs.

[0010] Further, the water inlet cavity is communicated with the cylinder head water inlet tank through a first water channel and with the cylinder block water channel through a second water channel; the water return cavity is communicated with the cylinder head water outlet tank through a fourth water return channel and with the cylinder block water channel through a third water return channel.

[0011] Further, the water inlet cavity is of an n-shaped structure, and the water outlet of the first water channel and the water inlet of the second water channel are respectively arranged on both sides of the reinforcing rib.

[0012] Further, the water outlet of the third water return channel is arranged on the lower side of the water return cavity, and the water inlet of the fourth water return channel is arranged on the upper side of the water return cavity.

[0013] Further, the water flow direction of the water channel of the air compressor sequentially passes through the cylinder head water inlet tank - the valve seat plate water inlet cavity - the cylinder block water channel - the valve seat plate water return cavity - the cylinder head water outlet tank, and the internal cooling water of the air compressor flows in a U-shaped manner for heat exchange.

[0014] Further, the cylinder head, the valve seat plate, and the cylinder block are provided with stud holes corresponding in position. The stud hole provided in the cylinder block forms a protruding boss in the cylinder block water channel, and the lower end of the boss is in arc transition.

[0015] Further, the part of the boss exposed in the cylinder block water channel is of a semi-cylindrical structure, and its lower end is a 1 / 4 spherical surface.

[0016] Further, the radius of the spherical surface is the same as the radius of the boss.

[0017] A method for reducing the discharge temperature of an air compressor in an efficient cooling system, which includes first disconnecting the long waist surface with an exhaust cavity and a connecting hole along the length direction into three parts: a first exhaust cavity surface, a second exhaust cavity surface, and a bolt connection surface. The bolt connection surface is located between the first exhaust cavity surface and the second exhaust cavity surface, and water passage gaps are respectively formed between the bolt connection surface and the first exhaust cavity surface and the second exhaust cavity surface, so that one side of both the first exhaust cavity and the second exhaust cavity close to the center point of the original long waist surface is surrounded by coolant. Then, the lower end of the lug protruding into the water channel of the cylinder block is designed as an arc transition surface.

[0018] The beneficial effects of the present invention compared with the prior art include: by optimizing and enlarging the water channel of the exhaust cavity, the total area of the inner water tank increases by more than 14%, so that the exhaust cavity is fully surrounded by coolant, thereby reducing the discharge temperature by more than 20°C, meeting the design requirements; the reduction of the discharge temperature also reduces the deformation amount of the piston ring caused by high temperature, reduces the risk of carbon deposition, and reduces the oil discharge with gas at the calibration point by about 1 / 3. Through the optimization of the air compressor itself, the market fault feedback and customer complaints will be reduced, and the brand value will be enhanced. Changing the bottom of the lug from an edge to a large arc transition reduces the air resistance generated by bubble accumulation, increases the coolant flow rate, and improves the heat transfer coefficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is the CAE analysis diagram of the existing air compressor.

[0020] Figure 2 is the three-dimensional diagram of the present invention.

[0021] Figure 3 is the sectional view of the cylinder head of the present invention.

[0022] Figure 4 is the sectional view of the valve seat plate of the present invention.

[0023] Figure 5 is the sectional view of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0024] The present invention will be further described in detail below in conjunction with the specific embodiments and with reference to the accompanying drawings. It should be emphasized that the following description is merely exemplary and not intended to limit the scope of the present invention and its applications.

[0025] Referring to the following drawings, non-limiting and non-exclusive embodiments will be described, where the same reference numerals represent the same components, unless otherwise specifically stated.

[0026] Such as Figures 2 to 5An air compressor of an efficient cooling system as shown. Currently, common air compressors include a cylinder head 1, a valve seat plate 2, and a cylinder block 3. The valve seat plate 2 is installed between the cylinder head 1 and the cylinder block 3. The valve seat plate 2 is also provided with a hollow inner water tank, and first air intake holes 61 and second air intake holes 62 are arranged at intervals along a fan-shaped arc surface on its lower side, and first exhaust cavities 27 and second exhaust cavities 26 are arranged at intervals along an oblong surface on its upper side. In the aforementioned prior art, an oblong surface is arranged on the upper side of the valve seat plate 2, and one side of both the first exhaust cavity 27 and the second exhaust cavity 26 close to the center point of the oblong surface is not surrounded by cooling water, resulting in a decline in the cooling effect, an abnormal increase in the exhaust temperature of the air compressor, a phenomenon of high-temperature burning yellow in the air outlet cavity of the cylinder head 1, and serious carbon deposition on the air outlet valve plate and the piston top. As an improvement, on the one hand, the structure of the oblong surface is improved in this embodiment, the total area of the inner water tank of the valve seat plate 2 is increased, the coolant coverage area around the exhaust cavity is increased, and the cooling effect of the exhaust cavity is improved; on the other hand, the structure of the inner water tank is improved, and the inner water tank is improved into two independent water inlet cavities 25 and a water return cavity 24.

[0027] Specifically, the oblong surface is disconnected into three parts along the length direction, including a first exhaust cavity surface 23, a second exhaust cavity surface 21, and a bolt connection surface 22. Water passing gaps 28 are respectively formed between the bolt connection surface 22 and the first exhaust cavity surface 23 and the second exhaust cavity surface 21, so that one side of both the first exhaust cavity 27 and the second exhaust cavity 26 close to the center point of the original oblong surface is surrounded by cooling water, the coolant coverage area around the exhaust cavity is increased, and the cooling effect of the inner water tank of the valve seat plate 2 on the first exhaust cavity 27 and the second exhaust cavity 26 is significantly improved. Preferably, reinforcing ribs 7 are respectively arranged on the first exhaust cavity surface 23 and the second exhaust cavity surface 21, and the cross-sectional area of the reinforcing ribs is smaller than the cross-sectional area of the original oblong surface.

[0028] On the other hand, a fan-shaped arc surface with a first air inlet hole 61 is connected to the bolt connection surface 22 through a partition rib 29, so that the bolt connection surface 22, the partition rib 29, and the fan-shaped arc surface of the first air inlet hole 61 divide the inner water tank into two independent parts, namely a water inlet cavity 25 and a water return cavity 24, which are not connected to each other. More specifically, the water inlet cavity 25 is communicated with the water inlet tank 12 of the cylinder head 1 through a first water channel 11 and is communicated with the cylinder block water channel 10 through a second water channel 4; the water return cavity 24 is communicated with the water outlet tank 14 of the cylinder head 1 through a fourth water return channel 13 and is communicated with the cylinder block water channel 10 through a third water return channel 8. Preferably, the water inlet cavity 25 is of an n-shaped structure, and the outlet of the first water channel 11 and the inlet of the second water channel 4 are separated by a reinforcing rib 7. After the cooling water enters the water inlet cavity 25 from the first water channel 11, it flows around 180° and then enters the cylinder block water channel 10 through the second water channel 4. The outlet of the third water return channel 8 is arranged on the lower side of the water return cavity 24, and the inlet of the fourth water return channel 13 is arranged on the upper side of the water return cavity 24. After the cooling water enters the water return cavity 24 from the cylinder block water channel 10 through the third water return channel 8, it then flows into the water outlet tank 14 of the cylinder head through the fourth water return channel 13, and then flows through the pipeline from the water outlet of the cylinder head 1 to other accessories to be cooled.

[0029] In the above solution, the water flow direction of the air compressor water channel sequentially passes through the water inlet tank 12 of the cylinder head - the water inlet cavity 25 of the valve seat plate - the cylinder block water channel 10 - the water return cavity 24 of the valve seat plate - the water outlet tank 14 of the cylinder head, and the cooling water inside the air compressor flows in a U shape for heat exchange.

[0030] In the above, by optimizing and enlarging the water channel of the exhaust cavity, the total area of the inner water tank increases by more than 14%, so that the exhaust cavity is fully surrounded by the coolant, thereby reducing the exhaust temperature by more than 20°C, meeting the design requirements; the reduction of the exhaust temperature also reduces the deformation amount of the piston ring caused by high temperature, reduces the risk of carbon deposition, and reduces the oil discharge amount with the gas at the calibration point by about 1 / 3. Through the optimization of the air compressor itself, the market failure feedback and customer complaints will be reduced, and the brand value will be enhanced.

[0031] Refer to Figure 4 , in the existing air compressor, stud holes 5 with corresponding positions are provided on the cylinder head 1, the valve seat plate 2, and the cylinder block 3. The stud hole provided on the cylinder block 3 forms a protruding boss 92 in the cylinder block water channel 10, and the lower end of the boss 92 is an edge. The depth of the boss 92 extending into the cylinder block water channel 10 is too large, affecting the flow of the cooling water. Through CAE analysis, it is known that although the water flow rate meets the required value, from the perspective of the air compressor water jacket structure, multiple isolated high-level areas are formed ( Figure 1In the circled position), air bubbles are likely to accumulate, increasing air resistance, reducing water flow rate, and affecting heat transfer. From the CFD calculation results of the air compressor, the flow velocity in the isolated high-position area is low, and the heat transfer coefficient is low. Therefore, it is necessary to optimize the water jacket structure of this air compressor to connect the isolated high positions and improve degassing. As an improvement, the lug 92 extending into the water channel 10 of the cylinder block is a cylindrical structure, and its lower end is a hemispherical surface 91, that is, the edge is modified to a large arc chamfer. The radius of the hemispherical surface 91 is the same as the radius of the lug 92. In actual assembly, the part of the lug extending into the water channel 10 of the cylinder block exposed outside the water channel 10 of the cylinder block is a semi-cylinder. Correspondingly, 1 / 4 of the spherical surface is exposed at the lower end of the semi-cylinder. Changing the bottom of the lug from an edge to a large arc transition reduces the air resistance caused by air bubble accumulation, increases the flow rate of the coolant, and improves the heat transfer coefficient.

[0032] A method for reducing the discharge temperature of an air compressor with an efficient cooling system includes first disconnecting the long waist surface provided with an exhaust cavity and a connection hole along the length direction into three parts: a first exhaust cavity surface 23, a second exhaust cavity surface 21, and a bolt connection surface 22. The bolt connection surface 22 is located between the first exhaust cavity surface 23 and the second exhaust cavity surface 21, and water passage gaps 28 are respectively formed between the bolt connection surface 22 and the first exhaust cavity surface 23 and the second exhaust cavity surface 21, so that both sides of the first exhaust cavity 23 and the second exhaust cavity 21 close to the center point of the original long waist surface are surrounded by coolant, increasing the coolant coverage area around the exhaust cavity; then the lower end of the lug 92 protruding into the water channel 10 of the cylinder block is designed as an arc transition surface. The lug 92 protruding into the water channel of the cylinder block is a semi-cylindrical structure, and its lower end is a 1 / 4 spherical surface.

[0033] Those skilled in the art will recognize that numerous variations to the above description are possible, so the embodiments and the drawings are only used to describe one or more specific embodiments.

[0034] Although the exemplary embodiments considered to be the invention have been described and recited, those skilled in the art will understand that various changes and substitutions can be made thereto without departing from the spirit of the invention. Additionally, many modifications can be made to adapt a particular situation to the teachings of the invention without departing from the central concept described herein. Therefore, the invention is not limited to the specific embodiments disclosed herein, but the invention may also include all embodiments and their equivalents falling within the scope of the invention.

Claims

1. An air compressor of an efficient cooling system, comprising a cylinder head, a valve seat plate, and a cylinder block. The valve seat plate is installed between the cylinder head and the cylinder block. The valve seat plate is also provided with a hollow inner water tank, and a first air inlet hole and a second air inlet hole are arranged at intervals along a fan-shaped arc surface on its lower side. It is characterized in that: On the upper side of the valve seat plate, there are a first exhaust cavity surface, a second exhaust cavity surface, and a bolt connection surface. The bolt connection surface is located between the first exhaust cavity surface and the second exhaust cavity surface, and water passage gaps are respectively formed between the bolt connection surface and the first exhaust cavity surface and the second exhaust cavity surface. The sector arc surface with the first intake hole is connected to the bolt connection surface through a partition rib, so that the bolt connection surface, the partition rib, and the sector arc surface of the first intake hole divide the inner water tank into a water inlet cavity and a water return cavity, and the two are not connected to each other.

2. The air compressor of an efficient cooling system according to claim 1, characterized in that: Reinforcing ribs are respectively provided on the first exhaust cavity surface and the second exhaust cavity surface.

3. The air compressor of an efficient cooling system according to claim 2, characterized in that: The water inlet cavity is communicated with the cylinder head water inlet tank through a first water passage and with the cylinder block water passage through a second water passage; the water return cavity is communicated with the cylinder head water outlet tank through a fourth water return passage and with the cylinder block water passage through a third water return passage.

4. The air compressor of an efficient cooling system according to claim 3, characterized in that: The water inlet cavity is of an n-shaped structure, and the water outlet of the first water passage and the water inlet of the second water passage are respectively arranged on both sides of the reinforcing rib.

5. The air compressor of an efficient cooling system according to claim 3, characterized in that: The water outlet of the third water return passage is arranged on the lower side of the water return cavity, and the water inlet of the fourth water return passage is arranged on the upper side of the water return cavity.

6. The air compressor of an efficient cooling system according to claim 3, wherein: The water flow path of the air compressor sequentially passes through the cylinder head water inlet tank - the water inlet cavity of the valve seat plate - the cylinder block water passage - the water return cavity of the valve seat plate - the cylinder head water outlet tank, and the internal cooling water of the air compressor flows in a U-shaped path for heat exchange.

7. The air compressor of an efficient cooling system according to claim 1, characterized in that: The cylinder head, the valve seat plate, and the cylinder block are provided with stud holes corresponding in position. The stud hole provided in the cylinder block forms a protruding boss in the cylinder block water passage, and the lower end of the boss has an arc transition.

8. The air compressor of an efficient cooling system according to claim 7, characterized in that: The part of the boss exposed in the cylinder block water passage is of a semi-cylindrical structure, and its lower end is a 1 / 4 spherical surface.

9. The air compressor of an efficient cooling system according to claim 8, wherein: The radius of the spherical surface is the same as the radius of the boss.

10. A method for cooling the exhaust temperature of an air compressor as described in claim 1, which includes first disconnecting the long waist surface with the exhaust cavity and the connection hole along the length direction into three parts: a first exhaust cavity surface, a second exhaust cavity surface, and a bolt connection surface. The bolt connection surface is located between the first exhaust cavity surface and the second exhaust cavity surface, and water passage gaps are respectively formed between the bolt connection surface and the first exhaust cavity surface and the second exhaust cavity surface, so that there is coolant surrounding the sides of the first exhaust cavity and the second exhaust cavity close to the center point of the original long waist surface; then designing the lower end of the boss protruding into the cylinder block water passage as an arc transition surface.

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