CN211082202U

CN211082202U - Air compressor machine box and have air compressor machine of this box

Info

Publication number: CN211082202U
Application number: CN201921598940.XU
Authority: CN
Inventors: 林帮法
Original assignee: ZHEJIANG AUARITA PNEUMATIC TOOLS LLC
Current assignee: ZHEJIANG AUARITA PNEUMATIC TOOLS LLC
Priority date: 2019-09-24
Filing date: 2019-09-24
Publication date: 2020-07-24
Anticipated expiration: 2029-09-24

Abstract

The utility model discloses an air compressor machine box and have air compressor machine of this box. The box body comprises a main body part and a cylinder seat part, wherein an inner cavity of the main body part and an inner cavity of the cylinder seat part are communicated with each other, the main body part is cylindrical, a necking part is arranged between the inner end of the main body part and the outer end of the main body part, the inner diameter of the necking part is smaller than the inner diameter of the inner end of the main body part and the inner diameter of the outer end of the main body part, a reducing section with the inner diameter gradually reduced is arranged between the outer end of. This box, structural design is more reasonable, can guide the cooling air current that the fan blade produced better dispels the heat to the motor, can increase the proportion that enters into the cooling air current of jar seat portion simultaneously, makes the cylinder subassembly can obtain better cooling.

Description

Air compressor machine box and have air compressor machine of this box

Technical Field

The utility model relates to an air compressor machine, in particular to air compressor machine box and have air compressor machine of this box.

Background

An air compressor is air source equipment for compressing air, and generally comprises a box body, a motor and a cylinder assembly. The box includes main part and the jar seat portion of intercommunication each other, and the motor is installed at the main part inner, and the motor shaft stretches into inside and install crank and fan blade of main part, and the cylinder subassembly includes cylinder liner, piston, valve plate and cylinder cap, and the piston is installed in the piston cavity in the cylinder liner to be connected with the crank through the connecting rod. When the motor rotates, the piston is driven to reciprocate, air sucked into the cylinder sleeve is compressed, and high-pressure air is provided outwards.

When the air compressor machine during operation, the motor can produce the heat to along with the rising of motor self temperature, work efficiency reduces. Meanwhile, when air in the cylinder sleeve is compressed, the compressed air can also generate heat, so that the temperature of the piston, the cylinder sleeve, the valve plate and the cylinder cover is increased. An increase in the temperature of the piston, cylinder liner, valve plate and cylinder head leads on the one hand to a reduction in the service life of the seal between piston and cylinder liner. On the other hand, the physical properties of the gas determine that the higher the temperature of the gas, the larger the volume, the higher the pressure of the gas itself, and the harder it is to compress the gas. When the outside air enters the air inlet cavity and the piston cavity, the heat of the cylinder cover, the valve plate and the cylinder sleeve can be transferred to the air, the temperature of the cylinder sleeve, the valve plate and the cylinder cover is higher, the air temperature in the piston cavity is higher, and the working efficiency of the air compressor is lower. Meanwhile, the higher the temperature in the piston cavity is, the lower the service life of a sealing element in the piston cavity is, and the whole service life of the air compressor is reduced. Therefore, the heat dissipation performance of the motor and the air cylinder assembly has great influence on the working efficiency of the air compressor.

The patent number 201811471190, X, chinese patent titled as a multi-cylinder air compressor discloses an air compressor heat dissipation structure, wherein a cylinder cover is provided with a heat dissipation flow passage, the heat dissipation flow passage is communicated with an inner cavity of a box body, and meanwhile, the end surface of the inner end of the box body is provided with a heat dissipation hole. And a part of cooling airflow generated when the fan blades rotate dissipates heat of the cylinder sleeve, the valve plate and the cylinder cover through the heat dissipation flow channel. The other part of cooling airflow generated by the fan blade can be discharged through the heat dissipation hole on the end surface of the inner end of the box body, and in the process, the end part of the motor is dissipated.

The main body part of the existing box body is mostly in a straight cylinder shape, and when the fan blades rotate, air at the outer end of the main body part is sucked to form cooling airflow flowing axially. The cooling air current axial flow on the one hand because the hindrance of crank, connecting rod and electrode terminal surface can produce great vortex between the connecting rod inboard and the motor terminal surface, produces great windage, simultaneously because the vortex coils between connecting rod and motor terminal surface, the cooling air current temperature that constitutes the vortex can rise, and the existence of vortex still can hinder the lower cooling air current of other temperatures and motor tip contact, takes out the heat of motor, can not carry out better cooling to the motor. On the other hand, the cylinder seat part is arranged on the outer side of the straight cylindrical main body part, when cooling airflow flows axially, the cooling airflow is not easy to enter the cylinder seat part, the flow rate of the cooling airflow entering the cylinder seat part is small, and the cylinder assembly cannot be fully cooled by the cooling airflow.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims to provide an air compressor box, structural design is more reasonable, can guide the cooling air current that the fan blade produced better to dispel the heat to the motor, can increase the proportion of the cooling air current that enters into jar seat portion simultaneously, makes the cylinder assembly can obtain better cooling.

The above technical purpose of the present invention can be achieved by the following technical solutions: the utility model provides an air compressor machine box, includes main part and jar seat, and the main part is cylindricly, is equipped with the cavity in the jar seat, and main part inner chamber and jar seat inner chamber communicate each other, are provided with the necking portion between main part inner and the main part outer end, and the necking portion internal diameter is less than main part inner internal diameter and main part outer end internal diameter, is the reducing section that the internal diameter reduces gradually between main part outer end and the necking portion, is the flaring section between necking portion and the main part inner.

Through above-mentioned technical scheme, the internal diameter of reducing section reduces gradually for the cooling air current that the fan blade of installing in main part outer end tip produced can obtain the guide of reducing section inner wall, thereby makes partial cooling air current can flow to motor stator coil surface under the effect of reducing section inner wall, cools off motor stator tip. Meanwhile, the cylinder seat part is communicated with the inner cavity of the main body part, and after the necking part is arranged, the lower end of the cylinder seat part relatively extends into the main body part, so that the through flow area of the cylinder seat part and the main body part is increased, cooling air flow flowing along the axis can enter the cylinder seat part more easily, the cooling flow rate of the cylinder seat part is increased, and the cooling effect of the air cylinder assembly can be effectively improved.

An expansion section is arranged between the necking part and the inner end of the main body part, the inner diameter of one end, close to the necking part, of the expansion section is small, and the inner diameter of one end, close to the motor, of the expansion section is large. The space formed between the inner wall of the flaring end and the outer surface of the stator coil of the motor is increased along the axial direction, the flow speed of cooling air flow is reduced after the cooling air flow enters the space, and the static pressure is increased. The velocity of flow reduces and to carry out comparatively abundant heat transfer between making cooling air flow and the motor stator coil surface, takes away the heat on the electronic coil, and the velocity of flow reduces the intensity that also can reduce the production of vortex and vortex. The static pressure is increased, so that the cooling airflow at the position can be smoothly discharged out of the main body.

In addition, the main body part is provided with variable diameters, so that the longitudinal pressure resistance of the main body part can be better improved. When the air compressor works, the piston is always in a reciprocating and swinging motion state, and although balance is performed through the crank, a small part of longitudinal impact force is still transmitted to the main body part. The big at main part both ends, the centre is little, and whole hourglass shape that is for straight tube-shape, when the main part received vertical (perpendicular main part axis) pressure, the main part was more difficult to take place to warp, avoids the cross-section to become the ellipse from circular, improves the stability of during operation.

Preferably, the inner diameter of the outer end of the main body part is larger than that of the inner end of the main body part, the ratio of the inner diameter of the necking part to the inner diameter of the outer end of the main body part is 1: 1.15-1.30, and the ratio of the inner diameter of the necking part to the inner diameter of the inner end of the main body part is 1: 1.03-1.20.

Through the technical scheme, the outer single inner diameter of the main body part is increased, and the fan blade with larger outer diameter can be installed at the outer end of the main body part, so that the total flow of cooling air flow generated when the fan blade rotates is improved. After the total flow of cooling air flow promoted, the corresponding flow that cools off can increase to the motor, carries out refrigerated flow also can increase to the cylinder subassembly to reach better radiating effect.

The ratio of the reducing section to the inner diameter of the outer end of the main body is 1: 1.15-1.30, so that when cooling airflow generated by the fan blades flows in the axial direction, a certain compression ratio is ensured, and the wind pressure is ensured. On the other hand, the cooling air flow can flow to the cylinder seat portion more smoothly, and the flow distribution ratio of the cylinder seat portion is increased. On the other hand, the wind pressure increases, and corresponding cooling air current velocity of flow also can increase for the cooling gas can accurately be sprayed between stator coil surface and the flaring section inner wall, thereby plays better radiating effect to stator coil surface. And the proportion can guarantee better wind pressure in this within range, can not make whole windage too big again, influences the intake of main part outer end, and actual radiating effect is better.

The ratio of the inner diameter of the reducing section to the inner end of the main body part is 1: 1.03-1.20, so that the space between the flaring section and the stator coil is gradually increased, the wind speed is reduced, cooling airflow can fully contact with the outer surface of the stator coil to exchange heat, and the cooling efficiency is improved.

Preferably, the necked-down portion is proximate the inner end of the main body portion and the center of the cylinder base is between the necked-down portion and the outer end of the main body portion.

Through the technical scheme, most of the cylinder base part is positioned at the outer end of the necking part, so that cooling air flow generated by the fan blade can be discharged through the heat dissipation flow channel on the cylinder cover and the valve plate as much as possible. The radiating effect of the air cylinder assembly is improved, and relatively speaking, the working efficiency of the air compressor, improved by reducing the temperature of the air cylinder assembly, is higher than that of the air compressor, improved by reducing the temperature of the motor.

Preferably, a motor shaft seat is arranged in the box body and connected with the inner wall of the necking part through spokes.

Through above-mentioned technical scheme, the setting of motor axle bed can be fixed the motor shaft and support, and when motor shaft drive piston reciprocating motion, vibration and the swing that the piston produced can be used on the motor axle bed through the motor shaft. The inner diameter near the necking part is smaller, and the spoke is arranged at the position, so that the length of the spoke can be reduced, and the material is saved. On the other hand, the spokes can transmit the impact force to the outer walls of the box body on two sides of the necking part after being stressed, so that the purpose of dispersing the stress is achieved, and the integral structural strength of the box body is improved.

Preferably, the cross section of the cylinder seat part is a polygon or a circle with more than five sides.

Through the technical scheme, the cross section of the piston cavity is circular at one side, the cylinder seat part is positioned outside the cylinder sleeve, and the cylinder seat part is polygonal or circular with the number of sides larger than five, so that an annular airflow channel is formed between the inner wall of the cylinder seat part and the outer wall of the cylinder sleeve, and the distances from the outer wall of the cylinder sleeve to the inner wall of the cylinder seat part are basically the same. When the cooling air flow enters between the cylinder sleeve and the cooling air flow, the cooling air flow can uniformly cool the surface of the cylinder sleeve, and therefore a good cooling effect is achieved.

Preferably, the inner wall of the reducing section is a first conical surface, and the half-vertex angle α of the first conical surface is between 5 degrees and 20 degrees.

Through above-mentioned technical scheme, the undergauge section inner wall is conical surface one, when leading cooling air current, undergauge section inner wall can not produce great hindrance to cooling air current, and it is comparatively smooth and easy to flow. The half vertex angle of the first conical surface is smaller, the sectional area change of the reducing section is smaller, and the cooling airflow flows more smoothly and regularly.

Preferably, the inner wall of the flaring section is a second conical surface, and the half vertex angle β of the second conical surface is between 5 and 15 degrees.

Through above-mentioned technical scheme, flaring section inner wall is the circular conical surface, and the velocity of flow reduces gradually when corresponding cooling air current flows from the neck portion earlier the main part inner, and pressure risees gradually, and the law more flows, can produce better radiating effect.

Preferably, the outer wall of the lower side of the reducing section is provided with a support leg.

Through the technical scheme, the support legs are arranged at the lower part of the outer end of the cylinder seat part, so that impact force generated by the piston in the working process can be directly transmitted to the support legs, the rigidity of the integral structure of the box body is better, and vibration generated in the working process is smaller.

Through the technical scheme, the box body structure is improved, the effect of changing the distribution proportion of the cooling air flow is achieved, the proportion of the cooling air flow flowing to the cylinder body part is increased, and the proportion of the cooling air flow flowing to the motor end is correspondingly reduced. Meanwhile, the airflow flowing axially in the main body part is guided, so that the cooling airflow is directly guided to the end face of the stator coil of the linear motor, the cooling airflow is fully utilized, and the cooling effect on the motor is ensured.

Another object of the utility model is to provide an air compressor machine has better heat dispersion, and the temperature is lower during cylinder assembly and motor work, and work efficiency is high, and life is good.

The above technical purpose of the present invention can be achieved by the following technical solutions: the utility model provides an air compressor machine, including motor and cylinder subassembly, the cylinder subassembly includes the cylinder liner, a piston, valve plate and cylinder cap, set up the heat dissipation runner with cylinder base portion inner chamber intercommunication on cylinder cap and the valve plate, still include above-mentioned air compressor machine box, main part inner and motor end connection, the motor includes stator and rotor, around being equipped with stator coil on the stator, wear to be equipped with the motor shaft on the rotor, the motor shaft stretches into in the box and installs crank and fan blade, connect through the connecting rod between crank and the piston, stator coil end stretches into inside main part inner, the directional stator coil end surface of undergauge section inner wall, the louvre has been seted up on main part inner or the motor.

Through above-mentioned technical scheme, the setting of undergauge section and throat can lead cooling air current, makes the cooling air current of axial flow aim at motor stator coil surface and blow on the one hand, then flows between stator coil surface and the inner wall of main part, dispels the heat to electronic coil, and the louvre that follow on main part tip or the motor housing at last is discharged, takes out the heat that the motor produced.

The main body portion is provided in this manner, which has a better heat dissipation effect than a straight cylindrical main body portion. Because the stator and the rotor of the motor are solid, cooling air flow cannot pass through, and the heat dissipation holes can only be formed in the electrode shell or the end face of the inner end of the main body. When the straight cylindrical main body part is used, the cooling air flow flows in the axial direction, and the cooling air flow at the central part of the main body part directly impacts the end face of the stator or the rotor of the motor and then flows towards the outer sides of the stator and the rotor. This generates eddy currents between the connecting rod and the end surface of the motor, and also generates eddy currents at the rear end outside the end surface of the stator, i.e., the outer surface of the stator coil. After the outer surface of the stator coil generates eddy currents, the contact between the axially flowing cooling air flow close to the inner wall part of the main body part and the outer surface of the stator coil is influenced, and therefore the heat dissipation of the motor is influenced.

The main body part with the necking part and the contraction section is used, cooling air flow flowing in the axial direction can be guided, the cooling air flow is guided through the lower part of the contraction section, the cooling air flow on the lower part of the main body part flows upwards and towards the middle of the main body part and points to the outer surface of the stator coil of the motor, meanwhile, the axial air flow can enter the cylinder seat part more, the proportion of the cooling air flow entering the cylinder seat part is improved, and the cooling effect of the cylinder assembly is improved under the condition that the heat dissipation performance of the motor is not influenced.

The radiating holes can be formed in the inner end face of the main body part and can also be formed in the motor shell. The heat dissipation holes are formed in the end face of the main body, cooling air can flow out axially, and flowing is smoother. When the louvre sets up on motor housing, the cooling air current is longer along the distance that the electronic coil outer wall flows, and the heat transfer is more abundant, but the windage is great during relative flow.

Preferably, the inner diameter of the outer end of the main body part is larger than that of the inner end of the main body part, and the outer diameter of the fan blade is larger than that of the motor.

Through above-mentioned technical scheme, increase outer end internal diameter and use the bigger fan blade of external diameter, under the same motor speed, more cooling air current that can inhale is used for cooling by the fan blade to promote the cooling effect to motor and cylinder subassembly.

Preferably, the cylinder cover is provided with an air inlet cavity and an air outlet cavity, the air inlet cavity is located on one side, close to the motor, of the cylinder cover, and the air outlet cavity is located on one side, far away from the motor, of the cylinder cover.

Through above-mentioned technical scheme, because the existence of crank and connecting rod can produce the hindrance to cooling air flow's flow, the cooling air flow that is located the cylinder cap portion of connecting rod outer end can be greater than the cooling air flow of cylinder cap portion opposite side to make and be located cylinder body, valve plate and the cylinder cap of throat portion outer end side and have better cooling effect. Meanwhile, when the air compressor works, compressed high-temperature gas can enter the air outlet cavity, so that the temperature of the cylinder cover on the air outlet cavity side is higher than that of the other side of the cylinder cover. The side of the air outlet cavity of the cylinder cover is positioned above the cylinder seat part at the outer end of the necking part, so that more cooling air flow can be used for fully cooling the side with higher temperature of the cylinder cover, the utilization rate of the cooling air flow is improved, and the heat dissipation capacity is improved.

Preferably, the ratio of the volume of the air inlet cavity to the volume of the air outlet cavity is 1; 1.7-2.6; or the ratio of the area of the inner wall of the air inlet cavity to the area of the inner wall of the air outlet cavity is 1: 1.3-2.2.

Through the technical scheme, the volume of the cylinder cover is limited, and the volume of the air outlet cavity is increased to a great extent, so that the volume of the air inlet cavity is reduced. Meanwhile, for a simple and regular cavity structure, such as a cavity with a circular arc-shaped and polygonal cross section, the larger the volume, the larger the corresponding inner wall area. The volume that goes out the gas chamber is greater than the volume that admits air the chamber can make the inner wall area that goes out the gas chamber be greater than the inner wall area that admits air the chamber to make compressed high-temperature gas enter into go out the gas chamber after the heat can more transmit to the cylinder cap on, then distribute through the cylinder cap, avoid compressed gas that the higher temperature of back compression temperature enters into the gas holder, cause the gas temperature in the gas holder to rise, the pressure increase, reduce the last gas efficiency of air compressor machine.

Correspondingly, convex ridges, convex blocks and the like which are convex towards the center of the air outlet cavity can be arranged in the air outlet cavity to increase the area of the inner wall of the air outlet cavity, so that the heat exchange area is increased, but the volume of the air outlet cavity is not increased, and the volume of the air outlet cavity is equal to or smaller than that of the air inlet cavity.

Preferably, the end face of the rotor is provided with fan blades.

Through above-mentioned technical scheme, can improve the heat dissipation condition of stator coil inner wall. Generally, the length of the stator coil ends is greater than the rotor length. After the rotor end face is provided with the flabellum, the flabellum also can be located inside the stator coil, and when the rotor rotates, the flabellum produces centrifugal airflow, can cool off the stator coil to further promote stator coil's heat dispersion.

Preferably, the upper surface of the valve plate, which is opposite to the air inlet cavity and the air outlet cavity, is provided with a concave part.

Through above-mentioned technical scheme, can reduce the whole height of cylinder cap. Because the air compressor machine generally has certain requirement to the volume of admitting air chamber and giving vent to anger the chamber, after setting up the depressed part on the valve plate upper surface, the degree of depth of admitting air chamber and giving vent to anger the chamber on the corresponding cylinder cap can corresponding reduction to reduce the whole height of cylinder cap. Meanwhile, the thickness of the position of the cylinder cover is reduced after the concave part is arranged, and heat generated by the piston when air is compressed can be more rapidly transferred into the cylinder cover, so that the temperature is convenient to reduce.

Preferably, the valve plate is provided with a valve plate limiting block on the upper surface, and the valve plate limiting block is provided with a plurality of radiating inclined planes.

Through above-mentioned technical scheme, the setting up of a plurality of heat dissipation inclined planes can increase the surface area of stopper to increase heat transfer area, be convenient for carry out the heat transfer between the compressed air of stopper and the intracavity that admits air, thereby reduce the temperature of stopper, valve plate.

Preferably, the two ends of the motor are both provided with a box body.

Compared with the prior art, the beneficial effects of the utility model are that: through improving the inner structure to the box for the cooling air current that the axis flows can be used in motor stator surface, promotes stator coil's heat dispersion. Meanwhile, the flow distribution of the cooling air flow is adjusted, the proportion of the cooling air flow flowing to the cylinder seat part is increased, the heat dissipation capacity of the air cylinder assembly is improved, the temperature of the air cylinder assembly during working is reduced, the working efficiency and the service life of a sealing part are improved, the eddy current strength of the end part of the motor is reduced, and the heat dissipation of the motor is facilitated.

Drawings

FIG. 1 is a perspective view of an outer end of a main body according to one embodiment;

FIG. 2 is a perspective view of an inner end of a main body portion according to one embodiment;

FIG. 3 is a schematic perspective cross-sectional view of an embodiment;

FIG. 4 is a schematic cross-sectional view of the first embodiment;

FIG. 5 is a schematic cross-sectional view of the case body after being connected according to the first embodiment;

FIG. 6 is a perspective view of the second embodiment;

FIG. 7 is a schematic sectional view of the second embodiment;

FIG. 8 is an exploded view of the second embodiment;

FIG. 9 is a perspective view of a rotor in the second embodiment;

FIG. 10 is a perspective view of the cylinder head according to the second embodiment;

FIG. 11 is an exploded view of the valve plate stopper according to the second embodiment.

Reference numerals: 1. a box body; 2. a main body portion; 3. a cylinder seat portion; 4. shrinking the neck part; 5. an outer end of the main body; 6. an inner end of the main body; 7. a reducing section; 8. a flared section; 9. a motor shaft seat; 10. spokes; 11. a motor; 12. a cylinder assembly; 13. a cylinder liner; 14. a piston; 15. a valve plate; 16. a cylinder cover; 17. a heat dissipation flow channel; 18. a stator; 19. a rotor; 20. a stator coil; 21. a motor shaft; 22. a crank; 23. a fan blade; 24. a connecting rod; 25. heat dissipation holes; 26. an air inlet cavity; 27. an air outlet cavity; 28. a fan blade; 29. a piston cavity; 30. a seal member; 31. a muffler; 32. a first conical surface; 33. a second conical surface; 34. a support leg; 35. a recessed portion; 36. a valve plate limiting block; 37. a heat dissipation bevel; 38. and a valve plate.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.

Embodiment I, an air compressor box

As shown in fig. 1 to 5, an air compressor case comprises a main body part 2 and a cylinder base part 3, wherein the main body part 2 is cylindrical, the longitudinal section of the main body part is circular, a cavity is arranged in the cylinder base part 3, the inner cavity of the cylinder base part 3 is communicated with the inner cavity of the main body part 2, the two ends of the main body part 2 are respectively a main body part inner end 6 and a main body part outer end 5, the main body part inner end 6 faces to a motor 11 and is matched and connected with the motor 11, a necking part 4 is arranged in the middle of the main body part 2, the inner diameter of the necking part 4 is smaller than that of the main body part inner end 6 and is also smaller than that of the main body part outer end 5, a necking part 7 is arranged between the main body part outer end 5 and the necking part 4, the inner wall of the necking part 7 is a first conical surface 32, the inner diameter of the necking part 7 is gradually reduced from outside to inside along the axis of the main body part 2, the main body part 4 and the inner diameter of the main body part 2 is smaller than that of the main body part inner diameter of the main body part 2, the necking part 4 is between 1:1.15 to 1.30, a half vertex angle α of the main body part 2 is more preferably smaller than that of a main body part 4, the inner diameter of a main body part 34, the inner diameter of the main body part 2, the main body part 34, the inner diameter of the main body part 2 is more preferably, the inner diameter of a straight section is more preferably smaller than that of a straight section 7, the main body part 34, the inner diameter of a straight section of a main body part 34, the main body part 2, the main body part 34, the inner diameter of a straight section 7, the main body part 34, the inner diameter of the main body part.

The body outer end 5 has an inner diameter greater than the body inner end 6. Set up like this and make can install the fan blade 23 of bigger external diameter in the main part outer end 5 to can inhale more air formation cooling air current and be used for cooling motor 11 and cylinder assembly when making motor 11 drive fan blade 23 rotate, thereby promote the cooling effect, reduce the operating temperature of motor 11 and cylinder assembly 12.

A motor shaft seat 9 is arranged in the box body 1, and the motor shaft seat 9 is connected with the inner wall near the necking part 4 through spokes 10. The spokes 10 are arranged there, on the one hand, because the inner diameter at the constriction 4 is minimal, the length of the spokes 10 can be reduced, saving material. On the other hand, the reduced diameter section 7 and the expanded diameter section 8 are located on both sides of the constricted portion 4, where the spokes 10 are also connected, so that the connection of the spokes 10 and the constricted portion 4 forms a Y-shaped structure. When the spoke 10 receives the impact that the motor shaft seat 9 transmitted, the structure of Y shape can disperse the impact force to the undergauge section 7 and the flaring section 8 of spoke 10 both sides to improve the holistic structural strength of this department and the shock resistance of box 1 during operation, reduce the vibrations that the air compressor machine during operation produced. The spoke 10 quantity is 7, and the contained angle between two adjacent spokes 10 is roughly the same, and the contained angle between two spokes 10 except the top needs to be confirmed according to the external diameter size of cylinder liner 13, and the contained angle between two adjacent spokes 10 of other is roughly between 45~55 degrees to adjacent contained angle is the same basically.

The constricted portion 4 is close to the inner end 6 of the main body portion 2 and the cylinder seat portion 3 is centred between the constricted portion 4 and the main body portion outer end 5, so that the cylinder seat portion 3 is mostly outside the constricted portion 4. Due to the existence of the connecting rod 24, the crank 22, the spokes 10 and the motor shaft seat 9, a large obstruction is generated to the cooling airflow flowing in the axial direction, the flow field at the inner side of the necking part 4 is complicated, and the wind resistance is large when the cooling airflow flows. The flow field of the outer end 5 of the necking part 4 is relatively regular, and due to the existence of the reducing section 7, cooling air at the lower part of the main body part 2 can flow to the middle part of the main body part 2 to be guided, so that the cooling air can conveniently enter the cylinder seat part 3, and the ratio of the cooling air in the cylinder seat part 3 is increased.

The section of the cylinder seat part 3 is octagonal, and after the cylinder sleeve 13 is installed, cooling airflow entering the cylinder seat part 3 can surround the outer side of the outer wall of the piston cavity 29 uniformly to cool the cylinder sleeve 13. Because the cross section of the piston cavity 29 is generally circular, and the cross section of the inner wall of the cylinder base part 3 is octagonal, the piston cavity 29 can be better surrounded on the outer side of the piston cavity, and an approximately annular area is formed between the outer surface of the outer wall of the piston cavity 29 and the cross section of the cylinder base part 3, so that cooling air flow entering the cylinder base part 3 can be more uniformly distributed in the annular area, and a better and more uniform cooling effect is generated on the cylinder sleeve 13.

In the actual use process, the size of the box body 11 with a good actual use effect is approximately as follows, the inner diameter of the outer end of the main body part 22 is 136mm, the inner diameter of the necking part 44 is 110mm, the inner diameter of the inner end of the main body part 22 is 124mm, the half vertex angle α of the first conical surface is 14.6 degrees, and the half vertex angle β of the second conical surface is 11.8 degrees.

In the second embodiment, an air compressor is provided,

as shown in fig. 6 to 11, an air compressor includes a motor 11, a housing 1 according to the first embodiment, and a cylinder assembly 12. Two ends of the motor 11 are respectively provided with a box body 1.

The motor 11 comprises a stator 18 and a rotor 19, wherein a stator coil 20 is wound on the stator 18, and the end of the stator coil 20 protrudes out of the stator 18. The rotor 19 is installed in the stator 18, and the motor shaft 21 is inserted into the rotor 19. Both ends of the motor shaft 21 extend out of the rotor 19 and protrude from the ends of the stator 18 and the stator coil 20. Two ends of the stator 18 are respectively provided with a box body 1, and the two box bodies 1 are fixed through bolts, so that the motor 11 is clamped between the two box bodies 1. The motor shaft 21 extends into the main body 2 from the main body inner end 6. The motor shaft 21 is provided with a crank 22 and a fan blade 23 from inside to outside. When the motor 11 rotates, the crank 22 and the fan blade 23 are driven to rotate, and when the fan blade 23 rotates, air at the outer end 5 of the main body part is sucked into the main body part 2 to form cooling airflow for heat dissipation of the motor 11 and the cylinder assembly 12. The heat generated by the motor 11 is mainly concentrated on the stator 18, the stator 18 is a solid structure, and the rotor 19 is installed in the stator 18 and is also a solid structure. The motor 11 can therefore dissipate heat only through the end faces of the stator 18, the ends of the stator coils 20 and the outer side faces of the stator 18.

The cylinder assembly 12 includes a cylinder liner 13, a piston 14, a valve plate 15, and a cylinder head 16. A piston cavity 29 is formed in the cylinder sleeve 13, and a piston 14 is installed in the piston cavity 29. A seal 30 is provided between the piston 14 and the cylinder casing 13, and the seal 30 seals between the cylinder casing 13 and the piston 14. The valve plate 15 and the cylinder cover 16 are provided with heat dissipation flow channels 17, the heat dissipation flow channels 17 are communicated with the inner cavity of the cylinder seat part 3 and the inner cavity of the box body 1, so that cooling air flow generated by the fan blades 23 can pass through the valve plate 15 and the cylinder cover 16, the valve plate 15 and the cylinder cover 16 can be in contact with the cooling air flow, and effective cooling is achieved.

The cylinder assembly 12 is mounted on the cylinder block 3 of the housing 1 with the cylinder liner 13 mounted in the cylinder block 3 and the valve plate 15 and the cylinder head 16 mounted on the cylinder block 3 and the upper end of the cylinder liner 13. The piston 14 is connected with the crank 22 through a connecting rod 24, and when the motor 11 rotates, the connecting rod 24 drives the piston 14 to move up and down in the cylinder sleeve 13, so that gas in the piston cavity 29 is compressed.

The end of the stator coil 20 also extends into the body inner end 6, with the end of the stator coil 20 being inside the flared section 8. And the inner wall of the reducing section 7 is directed to the outer surface of the end of the stator coil 20, so that a part of the cooling air flow is directed to the outer surface of the stator coil 20. The end face of the inner end 6 of the main body is provided with a heat radiation hole 25, and cooling air flow entering between the outer surface of the end of the stator coil 20 and the inner wall of the flared section 8 is finally discharged from the heat radiation hole 25.

The end face of the rotor 19 is further provided with fan blades 28, the fan blades 28 are positioned inside the stator coil 20, and when the rotor 19 rotates, the fan blades 28 therein rotate together, so that centrifugal airflow is generated inside the stator coil 20. The centrifugal air flow flows around the inner surface of the stator coil 20, and carries away heat from the inner surface of the end of the stator coil 20. The existence of the fan blades 28 can also continuously discharge the airflow inside the end part of the stator coil 20, realize the circulation of the airflow inside the stator coil 20 and outside the stator coil 20, and improve the heat dissipation efficiency of the stator 18 of the motor 11.

The provision of the reduced diameter section 7 having a gradually decreasing inner diameter causes the cooling air flow in the lower half of the main body 2 to be deviated toward the middle of the main body 2. The lower half part of the main body part 2 is deviated towards the middle part of the main body part 2, and the corresponding middle and upper air flows of the main body part 2 are also deviated upwards, so that more cooling air flows can enter the cylinder seat part 3, the proportion of the cooling air flows entering the cylinder seat part 3 is improved, and the cooling effect of the cylinder assembly 12 is improved.

The inner diameter of the outer end 5 of the main body part is larger than that of the inner end 6 of the main body part, and the outer diameter of the fan blade 23 is larger than that of the motor 11. The fan blade 23 that the external diameter is bigger can be installed to 5 internal diameters in increase main part outer end, fan blade 23 external diameter is bigger, under the motor 11 drive of the same rotational speed, can produce more cooling air flows, the corresponding cooling air flow that carries out the heat dissipation to motor 11 can increase, the cooling flow that carries out the heat dissipation to the cylinder subassembly simultaneously also can increase, thereby promote the radiating effect of motor 11 and cylinder subassembly 12, reduce the operating temperature of motor 11 and cylinder subassembly, improve work efficiency, improve the life of sealing member 30 between cylinder liner 13 and the piston 14.

An air inlet cavity 26 and an air outlet cavity 27 are formed in the cylinder cover 16, an air inlet valve plate is mounted on the lower surface of the valve plate 15 opposite to the air inlet cavity 26, and an air outlet valve plate 38 is mounted on the upper surface of the valve plate 15 opposite to the air outlet cavity 27. When the piston cavity 29 inhales, the air inlet valve plate is opened, and outside air enters the piston cavity 29 through the air inlet cavity 26. When the piston cavity 29 is exhausted, the air outlet valve plate is opened, and the compressed air in the piston cavity 29 enters the air outlet cavity 27 through the air outlet valve plate. The outlet chamber 27 and the inlet chamber 26 are both directly above the piston chamber 29. The inlet chamber 26 is located on the side of the cylinder cover 16 close to the motor 11, and the outlet chamber 27 is located on the side of the cylinder cover 16 away from the motor 11. The volume of the exit chamber 27 is greater than the volume of the inlet chamber 26 such that the inner wall area of the exit chamber 27 is greater than the inner wall area of the inlet chamber 26. According to a lot of tests, when the volume ratio of the air inlet cavity 26 to the air outlet cavity 27 is 1: 1.7-2.6, or the area ratio of the inner walls of the air inlet cavity 26 to the air outlet cavity 27 is 1: 1.3-2.2, the heat dissipation performance of the cylinder cover 16 is good, and the temperature of the cylinder cover 16 is low during operation. For example, the inlet chamber 26 and the outlet chamber 27 may be arranged in a ratio of the inner wall area of the inlet chamber 26 to the inner wall area of the outlet chamber 27 of 1:1.64, and the volume ratio of the inlet chamber 26 to the outlet chamber 27 of 1: 1.92; or the ratio of the inner wall areas of the air inlet cavity 26 to the air outlet cavity 27 is 1:1.93, and the ratio of the volumes of the air inlet cavity 26 to the air outlet cavity 27 is 1: 2.48.

The inlet chamber 26 and the outlet chamber 27 are arranged so that, on the one hand, the flow rate of the cooling air flow on the side of the head 16 close to the outer end 5 of the main body is large, and the flow rate of the cooling air flow on the side of the head 16 close to the inner end 6 of the main body is small. Meanwhile, during the actual operation of the air compressor, the temperature of the air outlet cavity 27 side of the cylinder cover 16 is higher than that of the air inlet cavity 26 side. The outlet cavity 27 side with higher temperature of the cylinder cover 16 is arranged above the cylinder seat part 3 with larger flow of cooling air flow, so that the cooling air flow with larger flow at the position can be fully utilized to cool the outlet cavity 27 side of the cylinder cover 16, the cooling air flow is fully utilized, and the overall temperature of the cylinder cover 16 is reduced. Still install the muffler on the cylinder cap 16, the muffler is installed at the cylinder cap 16 inboard to most is in motor 11 top, makes cylinder cap 16 and motor 11 shelter from and protect muffler 31, prevents that muffler 31 from colliding with other objects in the use, leads to damaging.

The upper surface of the valve plate 15, which is just opposite to the air inlet cavity 26 and the air outlet cavity 27, is provided with the recessed part 35, and the recessed part 35 can be arranged on the valve plate 15, so that the depths of the air inlet cavity 26 and the air outlet cavity 27 on the cylinder cover 16 can be correspondingly reduced, and the volumes of the air inlet cavity 26 and the air outlet cavity 27 can also be ensured under the condition of correspondingly reducing the overall height of the cylinder cover 16. After valve plate 15 set up depressed part 35 simultaneously, valve plate 15 thickness reduction of depressed part 35 department for the heat that the gas in the 14 intracavity of piston produced when compressing can transmit the cylinder to the air in chamber 26 or the play air cavity 27 more fast, then transmits the heat dissipation on cylinder cap 16 through the air in chamber 26 or the play air cavity 27 of admitting air, obtains better radiating effect. Correspondingly, a plurality of radiating inclined planes 37 can be arranged on the valve plate limiting block 36 arranged on the upper surface of the valve plate 15, so that the heat exchange area is increased, the temperature on the valve plate 15 is accelerated to be transferred to the compressed air in the air outlet cavity 27, and finally, the heat is transferred to the cylinder cover 16 to be radiated.

Through the change to the box structure, the air compressor machine that adopts the box in embodiment one compares with the air compressor machine that original main part is straight tube-shape, adopts the motor and the cylinder body subassembly of the same model, and under the same operating mode, both last, the operating parameter of steady job time is as shown in the following table:

	straight cylinder type air compressor	Example two	Ratio of performance improvement
				Total flow of cooling gasMeasurement of	670.3 L/min	905.1L/min	The improvement is 35.0 percent
Cylinder assembly cooling airflow rate	323.1 L/min	591.5 L/min	The lift is 83.1 percent
				Ratio of cooling airflow flow of cylinder assembly	48.2%	65.4%	The improvement is 35.7 percent
Flow rate of cooling air flow of motor	347.2 L/min	313.6 L/min	The reduction is 9.7 percent
				Ratio of cooling airflow flow of motor	51.8%	34.6%	The reduction is 33.2 percent
Temperature rise of cylinder sleeve during operation	80℃	55℃	The reduction is 31.3 percent
				Temperature rise of valve plate	130℃	95℃	The reduction is 26.9 percent
Temperature rise of cylinder cover	90℃	70℃	The reduction is 22.2 percent
				Temperature rise of motor	55℃	50℃	The reduction is 10.0 percent
Seal life	600 to 800 hours	Over 1200 hours	More than 50 percent

As can be seen from the above table, the necking part 4 is arranged on the main body part 2, the reducing section 7 is arranged between the outer end of the main body part 2 and the necking part 4, the flow rate of the cooling air flow flowing to the cylinder part can be greatly increased, and meanwhile, due to the arrangement of the reducing section 7, the temperature rise of the motor 11 cannot be greatly increased, and the heat loss is small. In addition, through increase 2 outer end internal diameters of main part and the internal diameter of fan blade 23, total cooling airflow flow obviously promotes, and the work temperature rise of cylinder body subassembly reduces by a wide margin after the improvement, and sealing member 30's life improves by a wide margin.

The above description is only an exemplary embodiment of the present invention, and is not intended to limit the scope of the present invention, which is defined by the appended claims.

Claims

1. The utility model provides an air compressor machine box, includes main part (2) and jar seat portion (3), and main part (2) are cylindricly, are equipped with the cavity in jar seat portion (3), and main part (2) inner chamber and jar seat portion (3) inner chamber communicate characterized by each other: be provided with throat portion (4) between main part inner (6) and main part outer end (5), throat portion (4) internal diameter is less than main part inner (6) internal diameter and main part outer end (5) internal diameter, is reducing diameter section (7) that the internal diameter reduces gradually between main part outer end (5) and throat portion (4), is flaring section (8) between throat portion (4) and the main part inner (6).

2. The air compressor casing of claim 1, wherein: the inner diameter of the outer end (5) of the main body part is larger than that of the inner end (6) of the main body part, the ratio of the inner diameter of the necking part (4) to the inner diameter of the outer end (5) of the main body part is 1: 1.15-1.30, and the ratio of the inner diameter of the necking part (4) to the inner diameter of the inner end (6) of the main body part is 1: 1.03-1.20.

3. The air compressor casing of claim 1, wherein: the necking part (4) is close to the inner end (6) of the main body part, and the center of the cylinder seat part (3) is positioned between the necking part (4) and the outer end (5) of the main body part.

4. The air compressor casing of claim 1, wherein: a motor shaft seat (9) is arranged in the box body (1), and the motor shaft seat (9) is connected with the inner wall of the position of the necking part (4) through a spoke (10).

5. The air compressor casing of claim 4, wherein: the number of the spokes (10) is seven.

6. The air compressor casing of claim 1, wherein: the section of the cylinder seat part (3) is polygonal or circular with the number of sides larger than five.

7. The air compressor box body as claimed in claim 1, wherein the inner wall of the reducing section (7) is a first conical surface (32), and the half-vertex angle α of the first conical surface (32) is between 10 degrees and 20 degrees.

8. The air compressor box body as claimed in claim 1 or 7, wherein the inner wall of the flared section (8) is a second conical surface (33), and the half-vertex angle β of the second conical surface (33) is between 5 and 15 degrees.

9. The air compressor casing of claim 1, wherein: the outer wall of the lower side of the reducing section (7) is provided with a supporting leg (34).

10. The utility model provides an air compressor machine, includes motor (11) and cylinder subassembly (12), and cylinder subassembly (12) are including cylinder liner (13), piston (14), valve plate (15) and cylinder cap (16), offer on cylinder cap (16) and valve plate (15) with cylinder seat portion (3) heat dissipation runner (17) of inner chamber intercommunication, characterized by: the air compressor box body (1) further comprises any one of claims 1 to 9, the inner end (6) of the main body part is connected with the end of the motor (11), the motor (11) comprises a stator (18) and a rotor (19), a stator coil (20) is wound on the stator (18), a motor shaft (21) penetrates through the rotor (19), the motor shaft (21) extends into the box body (1) and is provided with a crank (22) and a fan blade (23), the crank (22) is connected with the piston (14) through a connecting rod (24), the end of the stator coil (20) extends into the inner end (6) of the main body part, the inner wall of the reducing section (7) points to the outer surface of the end of the stator coil (20), and heat dissipation holes (25) are formed in the inner end (6) of the main body part or the.

11. The air compressor as claimed in claim 10, wherein: the inner diameter of the outer end (5) of the main body part is larger than that of the inner end (6), and the outer diameter of the fan blade (23) is larger than that of the motor (11).

12. The air compressor as claimed in claim 10, wherein: an air inlet cavity (26) and an air outlet cavity (27) are formed in the cylinder cover (16), the air inlet cavity (26) is located on one side, close to the motor (11), of the cylinder cover (16), and the air outlet cavity (27) is located on one side, far away from the motor (11), of the cylinder cover (16).

13. The air compressor as claimed in claim 12, wherein: the ratio of the volume of the air inlet cavity (26) to the volume of the air outlet cavity (27) is 1: 1.7-2.6; or the ratio of the inner wall area of the air inlet cavity (26) to the inner wall area of the air outlet cavity (27) is 1: 1.3-2.2.

14. The air compressor as claimed in claim 10, wherein: the end face of the rotor (19) is provided with fan blades (28).

15. The air compressor as claimed in claim 12, wherein: the upper surface of the valve plate (15) opposite to the air inlet cavity (26) and the air outlet cavity (27) is provided with a concave part (35).

16. The air compressor as claimed in claim 10, wherein: a valve plate limiting block (36) is installed on the upper surface of the valve plate (15), and a plurality of radiating inclined planes (37) are arranged on the valve plate limiting block (36).

17. The air compressor as claimed in claim 10, wherein: the two ends of the motor (11) are both provided with the box body (1).