Supporting sealing device, compressor and air conditioner

Abstract

The application provides a support sealing device, a compressor and an air conditioner, wherein the support sealing device can support a rotating shaft and comprises a shell assembly including a containing cavity; a plurality of sealing members sleeved on the rotating shaft, and an airtight gap being left between any sealing member and the rotating shaft; and a plurality of air inlet channels provided on the shell assembly, wherein the air inlet channels are provided in one-to-one correspondence with the sealing members, any air inlet channel can transmit gas with pressure into the airtight gap through the corresponding sealing member, so that the airtight gap can block external gas. By adopting the above structure, the containing cavity can be sealed through the airtight gap between the rotating shaft and the sealing members, and external gas is prevented from flowing into the containing cavity through the airtight gap, so that gas exchange between the containing cavity and the outside can be ensured. In the case that the support sealing device is used in the compressor, the compressor can be prevented from leaking, so that the ideal state of 0 theoretical leakage can be achieved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of household electrical appliances, and particularly relates to a supporting and sealing device, a compressor and an air conditioner. BACKGROUND

[0002] The compressor in the prior art usually adopts a sliding bearing or a magnetic suspension bearing to support a rotating shaft, but the two bearings have the problems of high temperature rise and large volume. The compressor using a gas bearing has the problem of leakage due to poor sealing. SUMMARY

[0003] The present application aims to at least solve one of the problems in the prior art or related art.

[0004] To this end, the first object of the present application is to provide a supporting and sealing device.

[0005] The second object of the present application is to provide a compressor.

[0006] The third object of the present application is to provide an air conditioner.

[0007] To achieve the above at least one object, according to the first aspect of the present application, a supporting and sealing device is provided, which can support a rotating shaft, and comprises: a housing assembly comprising a receiving cavity; a plurality of sealing members sleeved on the rotating shaft, and each sealing member leaving an airtight gap with the rotating shaft; and a plurality of gas inlet channels provided on the housing assembly, each gas inlet channel corresponding to a sealing member, and each gas inlet channel being capable of transmitting gas with pressure through the corresponding sealing member into the corresponding airtight gap, so that the airtight gap can block external gas.

[0008] The supporting and sealing device provided in the present application is used in cooperation with the rotating shaft, the rotating shaft is arranged through the supporting and sealing device, and the supporting and sealing device can support the rotating shaft. Specifically, the supporting and sealing device is provided with through holes at both ends, and the rotating shaft passes through the through holes at both ends of the supporting and sealing device in sequence, so that the supporting and sealing device can support the rotating shaft. The supporting and sealing device comprises a housing assembly, the housing assembly comprises a receiving cavity, the through holes at both ends of the supporting and sealing device are in communication with the receiving cavity, and the rotating shaft passes through the through holes at both ends and locates at least part of the rotating shaft in the receiving cavity.

[0009] Further, in order to keep the receiving cavity in a sealed state and avoid gas exchange between the receiving cavity and the outside, a plurality of sealing members are further arranged in the supporting and sealing device. The plurality of sealing members are sleeved on the rotating shaft, and the sealing members leave airtight gaps with the rotating shaft. In the case that the air pressure at the airtight gap is high, an air film can be formed at the airtight gap, and the air film can block the external gas from flowing through the airtight gap, thereby playing a role in blocking external gas.

[0010] Further, in order to adjust the air pressure at the air-tight gap and enable the air-tight gap to adapt to external gas with different pressures, a plurality of air inlet channels are arranged on the shell assembly, and the air inlet channels are arranged in one-to-one correspondence with the sealing members. Specifically, one end of the air inlet channel is in communication with the outside, and the other end is arranged opposite to the sealing member. The end of any air inlet channel in communication with the outside can be in communication with a high-pressure gas source, so that the gas with pressure can be transmitted to the corresponding sealing member through the air inlet channel, and the high-pressure gas acts on the sealing member. The sealing member proposed in the application is made of porous material, that is, the high-pressure gas can be transmitted to the air-tight gap between the sealing member and the rotating shaft through the small holes on the sealing member, so as to form an air film at the air-tight gap.

[0011] Further, the pressure of the gas in the air inlet channel is adjustable, so that the sealing ability of the air film at the air-tight gap can be adjusted by adjusting the air pressure in the air inlet channel, and the air film can block the gas with various pressures from the outside, so that the sealing member can better seal the containing cavity.

[0012] Further, since the air pressure in the air-tight gap between the rotating shaft and the sealing member is relatively large, the air pressure in the air-tight gap can overcome the gravity of the rotating shaft to support the rotating shaft to a certain extent. Moreover, since the gas is used as the medium between the rotating shaft and the sealing member, even if the rotating shaft rotates relative to the sealing member, the friction between the rotating shaft and the sealing member will remain small. That is, the sealing member not only can seal the containing cavity, but also can support the rotating shaft and reduce the friction generated when the rotating shaft rotates.

[0013] Optionally, the number of sealing members is two, and the two sealing members are respectively located at positions close to the through holes at both ends of the support sealing device.

[0014] By arranging the sealing member with a certain gap between the rotating shaft in the support sealing device, the containing cavity can be sealed by the air-tight gap between the rotating shaft and the sealing member, and the external gas can be prevented from flowing into the containing cavity through the air-tight gap. In this way, gas exchange between the containing cavity and the outside can be ensured. In the case of using the support sealing device in a compressor, the leakage of the compressor can be avoided, so as to achieve the ideal state of theoretical leakage of 0.

[0015] According to the support sealing device described above, the following distinguished technical features can also be provided:

[0016] In the above technical solution, further, the air pressure between any sealing member and the rotating shaft is greater than the external air pressure, so as to seal the containing cavity.

[0017] In the technical solution, the air pressure between the sealing member and the rotating shaft is greater than the external air pressure. Specifically, the air inlet channel transmits high-pressure gas with a pressure greater than the external air pressure to the air-tight gap corresponding to the sealing member through the sealing member, so as to form an air film. Since the air pressure at the air-tight gap is much greater than the external air pressure, the air film pressure at this position is large, so that a gas-tight sealing structure can be formed to gas-seal the containing cavity and avoid gas exchange between the containing cavity and the external environment.

[0018] By making the air pressure between the rotating shaft and the sealing member greater than the external air pressure, a gas film with a large pressure can be formed between the rotating shaft and the sealing member to form a gas-tight sealing structure, thereby gas-sealing the containing cavity.

[0019] In the above technical solution, further, the plurality of sealing members include: a first sealing member sleeved on a first end of the rotating shaft; and a second sealing member sleeved on a second end of the rotating shaft away from the first end.

[0020] In the technical solution, the plurality of sealing members include a first sealing member and a second sealing member, the first sealing member is sleeved on a first end of the rotating shaft, and the second sealing member is sleeved on a second end of the rotating shaft, so that the two ends of the rotating shaft can be supported by the first sealing member and the second sealing member respectively to reduce the cantilever length of the rotating shaft, improve the cantilever structure of the rotating shaft, and improve the stability and reliability of the rotating shaft as a whole.

[0021] Further, any one of the sealing members can form an air-tight gap with the rotating shaft to form a gas-tight sealing structure. By sleeving the first sealing member and the second sealing member on the two ends of the rotating shaft respectively, a gas-tight sealing structure can be formed at the two ends of the rotating shaft respectively, further improving the sealing performance of the product.

[0022] By arranging the first sealing member and the second sealing member on the two ends of the rotating shaft respectively, on the one hand, the two ends of the rotating shaft can be supported by the first sealing member and the second sealing member respectively to reduce the cantilever length of the rotating shaft, improve the cantilever structure of the rotating shaft, and improve the stability and reliability of the rotating shaft as a whole; on the other hand, a gas-tight sealing structure can be formed at the two ends of the rotating shaft respectively, thereby further improving the sealing performance of the product.

[0023] In the above technical solution, further, the support sealing device further includes: a first fixing sleeve provided on the housing assembly, the first fixing sleeve including a first containing groove, and the first sealing member being arranged in the first containing groove; and a second fixing sleeve provided on the housing assembly, the second fixing sleeve including a second containing groove, and the second sealing member being arranged in the second containing groove.

[0024] In the technical scheme, the first fixing sleeve and the second fixing sleeve are arranged in the support sealing device, and the first fixing sleeve and the second fixing sleeve are arranged in the shell assembly. The first fixing sleeve comprises a first accommodating groove, and the first sealing element is arranged in the first accommodating groove. The second fixing sleeve comprises a second accommodating groove, and the second sealing element is arranged in the second accommodating groove.

[0025] Specifically, the first sealing element and the first fixing sleeve are arranged on the first end of the rotating shaft, the first sealing element is arranged between the first fixing sleeve and the rotating shaft, and the first fixing sleeve is used for limiting the first sealing element, so that the first sealing element cannot move relative to the rotating shaft.

[0026] Further, the second sealing element and the second fixing sleeve are arranged on the second end of the rotating shaft, the second sealing element is arranged between the second fixing sleeve and the rotating shaft, and the second fixing sleeve is used for limiting the second sealing element, so that the second sealing element cannot move relative to the rotating shaft.

[0027] By arranging the first fixing sleeve and the second fixing sleeve in the support sealing element, and arranging the first sealing element and the second sealing element in the first fixing sleeve and the second fixing sleeve respectively, the first sealing element and the second sealing element can be limited by the first fixing sleeve and the second fixing sleeve respectively, so that the first sealing element and the second sealing element cannot move relative to the rotating shaft, and the sealing performance of the first sealing element and the second sealing element is improved.

[0028] In the above technical scheme, further, the first fixing sleeve is provided with a first air inlet, and the first air inlet is arranged opposite to the first sealing element. The second fixing sleeve is provided with a second air inlet, and the second air inlet is arranged opposite to the second sealing element. The plurality of air inlet channels comprises: a first air inlet channel in communication with the first air inlet; and a second air inlet channel in communication with the second air inlet.

[0029] In the technical scheme, since the first sealing element is arranged inside the first fixing sleeve and the second sealing element is arranged inside the second fixing sleeve, in order to enable the gas in the air inlet channel to be transmitted to the first sealing element and the second sealing element, the first air inlet is arranged on the first fixing sleeve, and the second air inlet is arranged on the second fixing sleeve.

[0030] Specifically, the first fixing sleeve is provided with a first air inlet, and the first air inlet is arranged opposite to the first sealing element. The plurality of air inlet channels comprises: a first air inlet channel in communication with the first air inlet; and a second air inlet channel in communication with the second air inlet.

[0031] Further, the second fixed sleeve is provided with a second air inlet, the second air inlet is arranged opposite to the second sealing member, the plurality of air inlets includes a second air inlet, and the second air inlet is communicated with the second air inlet. In this way, the high-pressure gas in the second air inlet can be transmitted to the second sealing member through the second air inlet, thereby realizing the sealing function of the second sealing member.

[0032] By arranging the first air inlet on the first fixed sleeve and the second air inlet on the second fixed sleeve, the first air inlet is communicated with the first air inlet, and the second air inlet is communicated with the second air inlet. In this way, the high-pressure gas can be transmitted to the first sealing member through the first air inlet, and the high-pressure gas can be transmitted to the second sealing member through the second air inlet, thereby realizing the sealing function of the first sealing member and the second sealing member.

[0033] In the above technical solution, further, the support sealing device further comprises: a third sealing member sleeved on the rotating shaft, the first fixed sleeve comprises a third accommodating groove, the third sealing member is located in the third accommodating groove, and the first sealing member is located between the third sealing member and the outside.

[0034] In the technical solution, in order to further improve the support effect on the rotating shaft, the third sealing member is arranged in the support sealing device, wherein the third sealing member is sleeved on the rotating shaft, so that the rotating shaft can be further supported by the third sealing member. In order to limit the third support member, the first fixed sleeve is further provided with a third accommodating groove, and specifically, the third sealing member is located in the third accommodating groove, so that the third sealing member can be limited by the third fixed sleeve to avoid movement of the third sealing member relative to the rotating shaft.

[0035] Further, the first sealing member is located between the third sealing member and the outside. Understandably, the function of the first sealing member is to seal the gas in the accommodating cavity. By arranging the first sealing member between the third sealing member and the outside, the rotating shaft can be supported by the first sealing member and the third sealing member, and the accommodating cavity can be sealed by the first sealing member.

[0036] By arranging the third sealing member in the support sealing device and sleeving the third sealing member on the rotating shaft, the support effect of the support sealing device on the rotating shaft can be further improved, and the stability of the rotating shaft can be improved.

[0037] In the above technical solution, further, the axial length of the third sealing member is greater than the axial length of the first sealing member.

[0038] In the technical solution, the axial length of the third sealing member is greater than the axial length of the first sealing member. Understandably, the greater the contact area between the sealing member and the rotating shaft, the better the supporting effect of the sealing member on the rotating shaft. Therefore, by setting the axial length of the third sealing member to be greater than the axial length of the first sealing member, the contact area between the third sealing member and the rotating shaft can be increased, thereby improving the supporting effect of the third sealing member on the rotating shaft. Moreover, by setting the axial size of the first sealing member to be relatively small, the sealing effect of the first sealing member can be ensured while the occupied space of the first sealing member is reduced, which is beneficial to the miniaturization design of the product.

[0039] By setting the axial length of the third sealing member to be greater than the axial length of the first sealing member, on the one hand, the supporting effect of the third sealing member on the rotating shaft can be improved, and on the other hand, the occupied space of the first sealing member can be reduced, which is beneficial to the miniaturization design of the product.

[0040] In the above technical solution, further, the supporting and sealing device further comprises: a third air inlet channel arranged in the housing assembly; the first fixing sleeve is further provided with a third air inlet, and the third air inlet is arranged opposite to the third sealing member; and the third air inlet channel can transmit the gas with pressure to the third sealing member through the third air inlet.

[0041] In the technical solution, the third air inlet channel is arranged in the housing assembly, and the third air inlet channel can transmit the gas with pressure to the third sealing member. Specifically, one end of the third air inlet channel is in communication with the outside, so that the gas with pressure can be transmitted to the third sealing member through the third air inlet channel, thereby realizing the transmission of the high-pressure gas to the gas-tight gap through the third sealing member and achieving the sealing function of the third sealing member.

[0042] Further, in order to transmit the high-pressure gas in the third air inlet channel to the third sealing member, the first fixing sleeve is further provided with a third air inlet, and the third air inlet is arranged opposite to the third sealing member. The third air inlet can be in communication with the third air inlet channel, and the high-pressure gas can be transmitted to the third sealing member through the third air inlet channel and the third air inlet, and then transmitted to the gas-tight gap through the third sealing member, thereby achieving the sealing function of the third sealing member.

[0043] By arranging the third air inlet channel on the housing assembly and the third air inlet on the first fixing sleeve, the high-pressure gas can be transmitted to the third sealing member through the third air inlet channel and the third air inlet, thereby realizing the transmission of the high-pressure gas to the gas-tight gap through the third sealing member and achieving the sealing function of the third sealing member.

[0044] In the technical solution, further, the rotating shaft is provided with a limiting step, the supporting sealing device further comprises: a limiting disc, which is sleeved on the rotating shaft; and a fourth sealing element, which is sleeved on the rotating shaft and located in the fourth accommodating groove of the second fixed sleeve, the two ends of the limiting disc abut against the limiting step and the fourth sealing element respectively.

[0045] In the technical solution, in order to axially limit the rotating shaft, the supporting sealing device is further provided with a limiting disc. Specifically, the rotating shaft is provided with a limiting table, which is arranged at a position close to the second end of the rotating shaft. The supporting sealing device is provided with a limiting disc, which is sleeved on the rotating shaft, and one side of the supporting disc directly or indirectly axially supports the limiting table. Further, the supporting sealing device is further provided with a fourth sealing element, which is sleeved on the rotating shaft, and the fourth sealing element abuts against one side of the limiting step of the limiting disc away from the rotating shaft.

[0046] Further, the second fixed sleeve is provided with a fourth accommodating groove, and the fourth sealing element is located in the fourth accommodating groove. The second fixed sleeve is fixedly arranged in the housing assembly. Based on the fact that the second fixed sleeve is fixed and cannot move axially, the fourth sealing element also cannot move axially, and thus the fourth sealing element and the limiting disc can axially limit the rotating shaft, preventing the rotating shaft from moving axially.

[0047] By arranging the limiting disc and the fourth sealing element in the supporting sealing device, arranging the limiting disc between the limiting step of the rotating shaft and the fourth sealing element, and axially limiting the fourth sealing element by the second fixed sleeve, the rotating shaft can be axially limited by the second fixed sleeve, the fourth sealing element and the limiting disc arranged in sequence, so that the rotating shaft can be kept stable.

[0048] In the technical solution, further, the supporting sealing device further comprises: a fourth air inlet channel arranged in the housing assembly; and the second fixed sleeve is further provided with a fourth air inlet, which is arranged opposite to the fourth sealing element. The fourth air inlet channel can transmit the gas with pressure to the fourth sealing element through the fourth air inlet.

[0049] In the technical solution, the supporting sealing device is further provided with a fourth air inlet channel, which is arranged in the housing assembly. The fourth air inlet channel can transmit the gas with pressure to the fourth sealing element. Specifically, one end of the fourth air inlet channel is in communication with the outside, so that the gas with pressure can be transmitted to the fourth sealing element through the fourth air inlet channel, and then the high-pressure gas can be transmitted to the airtight gap through the fourth sealing element, realizing the sealing function of the fourth sealing element.

[0050] By arranging the fourth air inlet channel on the housing assembly and the fourth air inlet on the second fixed sleeve, the high-pressure gas can be transmitted to the fourth sealing element through the fourth air inlet channel and the fourth air inlet, and then the high-pressure gas can be transmitted to the airtight gap through the fourth sealing element, realizing the sealing function of the fourth sealing element.

[0051] In the technical solution, the supporting and sealing device further comprises a plurality of supporting members, which are respectively arranged on the outer walls of the third sealing member and the fourth sealing member.

[0052] In the technical solution, the outer walls of the third sealing member and the fourth sealing member are respectively provided with a plurality of supporting members, and the supporting members protrude from the outer walls of the third sealing member or the fourth sealing member. Specifically, the supporting members on the outer wall of the third sealing member can abut against the inner wall of the third accommodating groove, and the supporting members on the outer wall of the fourth sealing member can abut against the inner wall of the fourth accommodating groove, so that the supporting force can be transmitted to the third sealing member and the fourth sealing member through the supporting members to support the third sealing member and the fourth sealing member.

[0053] In the technical solution, the supporting and sealing device further comprises a first supporting sleeve arranged on the housing assembly, and the first supporting sleeve is sleeved on the first fixing sleeve to support the first fixing sleeve.

[0054] In the technical solution, the first supporting sleeve is arranged in the supporting and sealing device to limit the first fixing sleeve. Specifically, the first supporting sleeve is sleeved on the first fixing sleeve to fix the first fixing sleeve. The first supporting sleeve is fixed on the housing assembly, so that the first fixing sleeve can be fixed relative to the housing assembly.

[0055] By arranging the first supporting sleeve in the supporting and sealing device, the first fixing sleeve can be fixed by the first supporting sleeve, so that the first fixing sleeve can be fixed relative to the housing assembly.

[0056] In the technical solution, any of the sealing members comprises an air cavity arranged along the circumference of the sealing member, and any of the air cavities can communicate with the corresponding air inlet channel.

[0057] In the technical solution, the air cavity is arranged in any of the sealing members. Specifically, the air cavity is arranged along the circumference of the sealing member, and the inner wall of the air cavity is recessed from the surface of the sealing member. Any of the air cavities can communicate with the corresponding air inlet channel, so that the high-pressure gas can enter the air cavity. Understandably, due to the design of the air cavity structure, the contact area between the high-pressure gas and the sealing member is increased, so that the high-pressure gas can be more easily transmitted through the sealing member to the gap between the sealing member and the rotating shaft, and the gas transmission efficiency is improved.

[0058] Specifically, the air cavity arranged on the first sealing member communicates with the first air inlet channel through the first air inlet, and the air cavity arranged on the second sealing member communicates with the second air inlet channel through the second air inlet.

[0059] By arranging the air cavity on the sealing element, the air inlet channel can transmit high-pressure gas into the air cavity, increasing the contact area of the high-pressure gas with the sealing element, so that the high-pressure gas can be more easily transmitted through the sealing element into the gap between the sealing element and the rotating shaft, so as to adjust the air pressure in the air-tight gap by the high-pressure gas.

[0060] In the technical solution, further, the first fixed sleeve is further provided with a first connecting cavity, the first connecting cavity is located between the first accommodating groove and the third accommodating groove, and the first connecting cavity is in communication with the first accommodating groove and the third accommodating groove, so as to form a limiting structure in the first fixed sleeve, and the first sealing element and the third sealing element are axially limited by the limiting structure.

[0061] The second aspect of the present application further provides a compressor, which comprises the support sealing device provided by the first aspect of the present application, and a rotating shaft arranged in the support sealing device and capable of rotating relative to the support sealing device.

[0062] The compressor provided by the present application comprises the support sealing device and the rotating shaft, the rotating shaft is arranged in the support sealing device, and the rotating shaft can rotate relative to the support sealing device under the driving of an external force.

[0063] The compressor provided by the second aspect of the present application has all the beneficial effects of the support sealing device because it comprises the support sealing device provided by the first aspect of the present application.

[0064] In the technical solution, further, the compressor further comprises a plurality of air guides corresponding to the plurality of sealing elements of the support sealing device, any air guide is located between the corresponding sealing element and the outside, and the air guide can guide the airflow to the corresponding sealing element.

[0065] In the technical solution, a plurality of air guides are arranged in the compressor, and the air guides are corresponding to the sealing elements in the support sealing device. Specifically, the number of air guides can be two, and the two air guides are arranged at the two ends of the compressor. Further, any air guide is located between the corresponding sealing element and the outside, and in the running state of the air guide, the air guide can guide the flow direction of the airflow, specifically, the air guide can guide the airflow to the corresponding sealing element. Since the air-tight gap between the sealing element and the rotating shaft has a sealing effect, the airflow cannot flow into the accommodating cavity through the air-tight gap, thereby avoiding the leakage of the compressor, and further achieving the ideal state of 0 theoretical leakage.

[0066] In the technical solution, further, the compressor further comprises a plurality of external sealing elements corresponding to the plurality of air guides, and any external sealing element is arranged between the corresponding air guide and the housing assembly of the support sealing device.

[0067] In the technical scheme, the compressor further comprises a plurality of external sealing members, the external sealing members are arranged in one-to-one correspondence with the air guide members, any external sealing member is arranged between the corresponding air guide member and the shell assembly of the support sealing device, so that the gap between the air guide member and the shell assembly can be sealed by the external sealing member, the air tightness of the compressor is improved, and the leakage of the compressor is reduced.

[0068] In the technical scheme, the compressor further comprises a stator comprising a rotor cavity, the stator being located in the accommodating cavity of the shell assembly; and a rotor located in the rotor cavity, the rotor being connected with the rotating shaft, and the rotating shaft being capable of driving the rotor to rotate relative to the stator.

[0069] In the technical scheme, the compressor further comprises a stator comprising a rotor cavity, the stator being located in the accommodating cavity of the shell assembly; and a rotor located in the rotor cavity, the rotor being connected with the rotating shaft, and the rotating shaft being capable of driving the rotor to rotate relative to the stator.

[0070] In the technical scheme, the compressor further comprises a first bearing sleeved on the rotating shaft, the first bearing and the first sealing member in the support sealing device are respectively located on two sides of the stator along the axial direction of the rotating shaft; and a second support sleeve arranged on the shell assembly, the second support sleeve being sleeved on the first bearing and used for supporting the first bearing.

[0071] In the technical scheme, the compressor further comprises a first bearing sleeved on the rotating shaft, the first bearing and the first sealing member are respectively supported on two ends of the rotating shaft through the first bearing and the first sealing member and the third sealing member, so that the rotating shaft is kept stable.

[0072] Further, the compressor further comprises a second support sleeve fixedly arranged on the shell assembly, the first bearing is supported by the second support sleeve, so that the first bearing is kept stable, and the rotating shaft is kept stable.

[0073] In the technical scheme, the compressor further comprises a second bearing sleeved on the rotating shaft, the second bearing being located between the second support sleeve and the limiting disc of the support sealing device.

[0074] In the technical scheme, the compressor further comprises a second bearing sleeved on the rotating shaft, and the second bearing is located between the second support sleeve and the limiting disc of the support sealing device, so that the rotating shaft is axially limited by the second bearing, the limiting disc of the support sealing device and the fourth sealing member, the rotating shaft is kept stable while being prevented from axially moving.

[0075] The third aspect of the present application further provides an air conditioner comprising the support sealing device provided in the first aspect of the present application or the compressor provided in the second aspect of the present application.

[0076] The air conditioner provided in the third aspect of the present invention, having the support sealing device proposed in the first aspect of the present invention or the compressor proposed in the second aspect of the present invention, has all the beneficial effects of the support sealing device or the compressor.

[0077] Additional aspects and advantages of the invention will become apparent in the following description or may be learned by practice of the invention. Attached Figure Description

[0078] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0079] Figure 1 A schematic diagram of the compressor according to an embodiment of the present invention is shown;

[0080] Figure 2 It shows along Figure 16 A sectional view of the FF section line;

[0081] Figure 3 One of the structural schematic diagrams of the first fixing sleeve according to an embodiment of the present invention is shown;

[0082] Figure 4 It shows along Figure 3 Sectional view of section line AA in the middle;

[0083] Figure 5 A schematic diagram of the structure of a third seal according to an embodiment of the present invention is shown;

[0084] Figure 6 It shows along Figure 5 Sectional view of the BB section line;

[0085] Figure 7 A schematic diagram of the structure of a first sealing element according to an embodiment of the present invention is shown;

[0086] Figure 8 It shows along Figure 7 A sectional view of the CC section line;

[0087] Figure 9 One of the structural schematic diagrams of the second fixing sleeve according to an embodiment of the present invention is shown;

[0088] Figure 10 It shows along Figure 9 A sectional view of the DD section line in the middle;

[0089] Figure 11 A second schematic diagram of the structure of the second fixing sleeve according to an embodiment of the present invention is shown;

[0090] Figure 12 shows the structure of the fourth seal of one embodiment of the present application. Figure 11 shows the structure of the fourth seal of one embodiment of the present application.

[0091] Figure 13 shows the structure of the fourth seal of one embodiment of the present application.

[0092] Figure 14 shows the structure of the fourth seal of one embodiment of the present application.

[0093] Figure 15 shows the structure of the fourth seal of one embodiment of the present application.

[0094] Figure 16 shows the structure of the fourth seal of one embodiment of the present application.

[0095] wherein, Figures 1 to 16 Corresponding relationship between reference signs and component names in the drawings is as follows:

[0096] 100 support seal device, 110 housing assembly, 111 accommodating cavity, 120 seal, 121 first seal, 122 second seal, 123 air cavity, 124 support piece, 130 air inlet channel, 131 first air inlet channel, 132 second air inlet channel, 133 third air inlet channel, 134 fourth air inlet channel, 140 first fixing sleeve, 141 first accommodating groove, 142 first air inlet, 143 third seal, 144 third accommodating groove, 145 third air inlet, 146 first connecting cavity, 150 second fixing sleeve, 151 second accommodating groove, 152 second air inlet, 153 fourth seal, 154 fourth accommodating groove, 155 fourth air inlet, 160 limiting disc, 170 first support sleeve, 200 compressor, 210 rotating shaft, 211 first bearing, 212 second support sleeve, 213 second bearing, 220 air guide piece, 230 external seal, 240 stator, 241 rotor cavity, 250 rotor, 260 flow guide piece. DETAILED DESCRIPTION

[0097] In order to enable persons skilled in the art to more clearly understand the above-mentioned purposes, features and advantages of the present application, the present application will be further described in detail below with reference to the drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0098] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application, however, the present application can also be practiced in other ways different from those described herein, therefore, the scope of protection of the present application is not limited by the specific embodiments disclosed below.

[0099] The following description refers to the accompanying drawings, which illustrate preferred embodiments of the present application. Figures 1 to 16The support sealing device 100, the compressor 200 and the air conditioner provided by some embodiments of the present application are described.

[0100] Embodiment I:

[0101] As shown in Figure 1 and Figure 2 , the first aspect of the present application proposes a support sealing device 100 capable of supporting a rotating shaft 210, the support sealing device 100 comprising: a housing assembly 110 comprising a receiving cavity 111; a plurality of sealing members 120 sleeved on the rotating shaft 210, the sealing members 120 being movably located in the receiving cavity 111, and a gas-tight gap being left between any sealing member 120 and the rotating shaft 210; and a plurality of gas inlet channels 130 provided on the housing assembly 110, the gas inlet channels 130 being provided in one-to-one correspondence with the sealing members 120, and any gas inlet channel 130 being capable of transmitting gas with pressure through the corresponding sealing member 120 into the corresponding gas-tight gap, so that the gas-tight gap can block external gas.

[0102] The support sealing device 100 proposed by the present application is used in cooperation with the rotating shaft 210, the rotating shaft 210 being arranged through the support sealing device 100, and the support sealing device 100 being capable of supporting the rotating shaft 210. Specifically, the support sealing device 100 is provided with through holes at both ends thereof, and the rotating shaft 210 is arranged through the through holes at both ends of the support sealing device 100 in sequence, so that the support sealing device 100 can support the rotating shaft 210. Among them, the support sealing device 100 comprises a housing assembly 110, the housing assembly 110 comprising a receiving cavity 111, the through holes at both ends of the support sealing device 100 being in communication with the receiving cavity 111, and the rotating shaft 210 being arranged through the through holes at both ends and having at least part of the rotating shaft 210 located in the receiving cavity 111.

[0103] Further, in order to keep the receiving cavity 111 in a sealed state and avoid gas exchange between the receiving cavity 111 and the outside, a plurality of sealing members 120 are further provided in the support sealing device 100. Among them, the plurality of sealing members 120 are sleeved on the rotating shaft 210, and a gas-tight gap is left between the sealing members 120 and the rotating shaft 210. In the case that the gas pressure at the gas-tight gap is relatively high, a gas film can be formed at the gas-tight gap, and the gas film can prevent external gas from flowing through the gas-tight gap, thereby playing a role in blocking external gas.

[0104] Further, in order to adjust the air pressure at the air-tight gap and enable the air-tight gap to adapt to external air with different pressures, a plurality of air inlet channels 130 are arranged on the shell assembly 110, and each air inlet channel 130 is arranged corresponding to a sealing member 120. Specifically, one end of each air inlet channel 130 is in communication with the outside, and the other end is arranged opposite to a sealing member 120. The end of each air inlet channel 130 in communication with the outside can be in communication with a high-pressure gas source, so that the gas with pressure can be transmitted to the corresponding sealing member 120 through the air inlet channel 130, and the high-pressure gas can act on the sealing member 120. The sealing member 120 proposed in the present application is made of porous material, that is, the high-pressure gas can be transmitted to the air-tight gap between the sealing member 120 and the rotating shaft 210 through the small holes on the sealing member 120, so as to form an air film at the air-tight gap.

[0105] Further, the pressure of the gas in the air inlet channel 130 is adjustable, so that the sealing ability of the air film at the air-tight gap can be adjusted by adjusting the air pressure in the air inlet channel 130, and the air film can block the air with various pressures from the outside, so that the sealing member 120 can better seal the containing cavity 111.

[0106] Further, since the air pressure in the air-tight gap between the rotating shaft 210 and the sealing member 120 is relatively high, the air pressure in the air-tight gap can overcome the gravity of the rotating shaft 210 to support the rotating shaft 210 to a certain extent. Moreover, since the gas is used as the medium between the rotating shaft 210 and the sealing member 120, even if the rotating shaft 210 rotates relative to the sealing member 120, the friction between the rotating shaft 210 and the sealing member 120 will remain small. That is, the sealing member 120 can not only seal the containing cavity 111, but also support the rotating shaft 210 and reduce the friction generated when the rotating shaft 210 rotates.

[0107] Optionally, the number of the sealing members 120 is two, and the two sealing members 120 are respectively arranged at the positions of the through holes near the two ends of the support sealing device 100.

[0108] By arranging the sealing members 120 with a certain gap between the rotating shaft 210 in the support sealing device 100, the containing cavity 111 can be sealed by the air-tight gap between the rotating shaft 210 and the sealing member 120, and the outside air can be prevented from flowing into the containing cavity 111 through the air-tight gap, so that the gas exchange between the containing cavity 111 and the outside can be prevented. In the case that the support sealing device 100 is used in the compressor 200, the leakage of the compressor 200 can be avoided, so as to achieve the ideal state that the theoretical leakage is 0.

[0109] Embodiment two:

[0110] As Figure 1 and Figure 15As shown, in another specific embodiment based on Embodiment 1, the air pressure between any seal 120 and the rotating shaft 210 is greater than the external air pressure, so as to gas seal the receiving cavity 111.

[0111] In this embodiment, the air pressure between any seal 120 and the rotating shaft 210 is greater than the external air pressure. Specifically, the air inlet channel 130 transmits high-pressure gas, which is greater than the external air pressure, through the seal 120 to the airtight gap corresponding to the seal 120, thereby forming an air film. Since the air pressure at the airtight gap is much greater than the external air pressure, the air film pressure at this location is relatively large, thus forming a gas-sealed structure to gas-seal the receiving cavity 111 and prevent gas exchange between the receiving cavity 111 and the outside.

[0112] By making the air pressure between the rotating shaft 210 and the seal 120 greater than the external air pressure, a high-pressure air film can be formed between the rotating shaft 210 and the seal 120, forming an airtight sealing structure, thereby sealing the receiving cavity 111 with gas.

[0113] Example 3:

[0114] like Figure 1 As shown, in a specific embodiment based on any of the above embodiments, the plurality of seals 120 include: a first seal 121, sleeved on the first end of the rotating shaft 210; and a second seal 122, sleeved on the second end of the rotating shaft 210 opposite to the first end.

[0115] In this embodiment, the plurality of seals 120 include a first seal 121 and a second seal 122. The first seal 121 is sleeved on the first end of the rotating shaft 210, and the second seal 122 is sleeved on the second end of the rotating shaft 210. Thus, the first seal 121 and the second seal 122 can support the two ends of the rotating shaft 210 respectively, thereby reducing the cantilever length of the rotating shaft 210, improving the cantilever structure of the rotating shaft 210, and improving the overall stability and reliability of the rotating shaft 210.

[0116] Furthermore, since any of the sealing elements 120 can form an airtight gap with the rotating shaft 210 to form a gas-sealed structure, by respectively sleeved the first sealing element 121 and the second sealing element 122 on both ends of the rotating shaft 210, gas-sealed structures can be formed at both ends of the rotating shaft 210, thereby further improving the sealing performance of the product.

[0117] By providing a first seal 121 and a second seal 122 at both ends of the rotating shaft 210, the first seal 121 and the second seal 122 can support both ends of the rotating shaft 210 respectively, thereby reducing the cantilever length of the rotating shaft 210, improving the cantilever structure of the rotating shaft 210, and enhancing the overall stability and reliability of the rotating shaft 210. On the other hand, gas sealing structures can be formed at both ends of the rotating shaft 210, thereby further improving the sealing performance of the product.

[0118] Example 4:

[0119] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 16 As shown, in a specific embodiment based on any of the above embodiments, the support sealing device 100 further includes: a first fixing sleeve 140 disposed on the housing assembly 110, the first fixing sleeve 140 including a first receiving groove 141, and a first sealing member 121 movably disposed in the first receiving groove 141; and a second fixing sleeve 150 disposed on the housing assembly 110, the second fixing sleeve 150 including a second receiving groove 151, and a second sealing member 122 movably disposed in the second receiving groove 151.

[0120] In this embodiment, the supporting sealing device 100 is further provided with a first fixing sleeve 140 and a second fixing sleeve 150, both of which are disposed in the housing assembly 110. The first fixing sleeve 140 includes a first receiving groove 141, and a first sealing member 121 is located within the first receiving groove 141. The second fixing sleeve 150 includes a second receiving groove 151, and a second sealing member 122 is located within the second receiving groove 151.

[0121] Specifically, such as Figure 2 As shown, Figure 2 for Figure 16 In the cross-sectional view along the FF section line, the first seal 121 and the first fixing sleeve 140 are together sleeved on the first end of the rotating shaft 210. The first seal 121 is located between the first fixing sleeve 140 and the rotating shaft 210. The first fixing sleeve 140 is used to limit the first seal 121, so that the first seal 121 cannot move relative to the rotating shaft 210.

[0122] Furthermore, the second seal 122 and the second fixing sleeve 150 are together sleeved on the second end of the rotating shaft 210. The second seal 122 is located between the second fixing sleeve 150 and the rotating shaft 210. The second fixing sleeve 150 is used to limit the second seal 122, so that the second seal 122 cannot move relative to the rotating shaft 210.

[0123] By setting the first fixing cylinder and the second fixing sleeve 150 in the support seal, and setting the first seal 121 and the second seal 122 in the first fixing sleeve 140 and the second fixing sleeve 150 respectively, the first seal 121 can be limited by the first fixing sleeve 140, and the second seal 122 can be limited by the second fixing sleeve 150, so that the first seal 121 and the second seal 122 cannot move relative to the rotating shaft 210, and the sealing performance of the first seal 121 and the second seal 122 is improved.

[0124] Embodiment five:

[0125] As shown in Figure 4 , Figure 10 and Figure 12 , in a specific embodiment based on any of the above embodiments, the first fixing sleeve 140 is provided with a first air inlet 142, and the first air inlet 142 is arranged opposite to the first seal 121; the second fixing sleeve 150 is provided with a second air inlet 152, and the second air inlet 152 is arranged opposite to the second seal 122; the plurality of air inlet channels 130 include: a first air inlet channel 131, which is in communication with the first air inlet 142; and a second air inlet channel 132, which is in communication with the second air inlet 152.

[0126] In this embodiment, since the first seal 121 is located inside the first fixing sleeve 140, and the second seal 122 is located inside the second fixing sleeve 150, in order to enable the gas in the air inlet channel 130 to be transmitted to the first seal 121 and the second seal 122, the first air inlet 142 is arranged on the first fixing sleeve 140, and the second air inlet 152 is arranged on the second fixing sleeve 150.

[0127] Specifically, the first fixing sleeve 140 is provided with the first air inlet 142, and the first air inlet 142 is arranged opposite to the first seal 121; the plurality of air inlet channels 130 include the first air inlet channel 131, and the first air inlet channel 131 is in communication with the first air inlet 142. In this way, the high-pressure gas in the first air inlet channel 131 can be transmitted to the first seal 121 through the first air inlet 142, and then the high-pressure gas is transmitted to the air-tight gap through the first seal 121, so as to realize the sealing function of the first seal 121.

[0128] Further, the second fixing sleeve 150 is provided with the second air inlet 152, and the second air inlet 152 is arranged opposite to the second seal 122; the plurality of air inlet channels 130 include the second air inlet channel 132, and the second air inlet channel 132 is in communication with the second air inlet 152. In this way, the high-pressure gas in the second air inlet channel 132 can be transmitted to the second seal 122 through the second air inlet 152, and then the high-pressure gas is transmitted to the air-tight gap through the second seal 122, so as to realize the sealing function of the second seal 122.

[0129] By setting the first air inlet 142 on the first fixed sleeve 140 and the second air inlet 152 on the second fixed sleeve 150, the first air inlet 142 can be connected to the first air passage 131, the second air inlet 152 can be connected to the second air passage 132, and then the high-pressure gas can be transmitted to the first sealing member 121 through the first air inlet 142 and to the second sealing member 122 through the second air inlet 152, so as to realize the transmission of the high-pressure gas to the corresponding air-tight gap through the first sealing member 121 and the second sealing member 122, and realize the sealing function of the first sealing member 121 and the second sealing member 122.

[0130] Embodiment six:

[0131] As shown in Figure 1 , Figure 2 , Figure 5 and Figure 6 , in a specific embodiment based on any of the above embodiments, the support sealing device 100 further comprises a third sealing member 143 sleeved on the rotating shaft 210, the first fixed sleeve 140 comprises a third accommodating groove 144, the third sealing member 143 is located in the third accommodating groove 144, and the first sealing member 121 is located between the third sealing member 143 and the outside.

[0132] In this embodiment, in order to further improve the support effect on the rotating shaft 210, the support sealing device 100 further comprises a third sealing member 143, wherein the third sealing member 143 is sleeved on the rotating shaft 210, so as to further support the rotating shaft 210 through the third sealing member 143. In order to limit the third support member 124, the first fixed sleeve 140 further comprises a third accommodating groove 144, and specifically, the third sealing member 143 is located in the third accommodating groove 144, so as to limit the third sealing member 143 through the third fixed sleeve, to avoid the movement of the third fixed sleeve along the axial direction relative to the rotating shaft 210.

[0133] Further, the first sealing member 121 is located between the third sealing member 143 and the outside. Understandably, the function of the first sealing member 121 is to seal the gas in the accommodating cavity 111, and by setting the first sealing member 121 between the third sealing member 143 and the outside, the rotating shaft 210 can be supported by the first sealing member 121 and the third sealing member 143, and the accommodating cavity 111 can be sealed by the first sealing member 121.

[0134] By setting the third sealing member 143 in the support sealing device and sleeving the third sealing member 143 on the rotating shaft 210, the support effect of the support sealing device 100 on the rotating shaft 210 can be further improved, and the stability of the rotating shaft 210 can be improved.

[0135] Furthermore, the axial length of the third seal 143 is greater than the axial length of the first seal 121.

[0136] In this embodiment, the axial length of the third seal 143 is greater than the axial length of the first seal 121. Understandably, the larger the contact area between the seal 120 and the rotating shaft 210, the better the support effect of the seal 120 on the rotating shaft 210. Therefore, setting the axial length of the third seal 143 to be greater than the axial length of the first seal 121 increases the contact area between the third seal 143 and the rotating shaft 210, thereby improving the support effect of the third seal 143 on the rotating shaft 210. Furthermore, setting the axial dimension of the first seal 121 to a smaller size can reduce the space occupied by the first seal 121 while ensuring its sealing effect, which is beneficial for product miniaturization design.

[0137] By setting the axial length of the third seal 143 to be greater than that of the first seal 121, the support effect of the third seal 143 on the rotating shaft 210 can be improved, and the space occupied by the first seal 121 can be reduced, which is conducive to the miniaturization design of the product.

[0138] Furthermore, the support sealing device 100 also includes: a third air inlet channel 133, which is disposed on the housing assembly 110; the first fixing sleeve 140 is also provided with a third air inlet 145, which is disposed opposite to the third sealing member 143, and the third air inlet channel 133 can transmit pressurized gas to the third sealing member 143 through the third air inlet 145.

[0139] like Figure 1 As shown, in this embodiment, a third air inlet channel 133 is also provided in the supporting sealing device 100. The third air inlet channel 133 is located in the housing assembly 110 and can transmit pressurized gas to the third seal 143. Specifically, one end of the third air inlet channel 133 is connected to the outside, so that pressurized gas can be transmitted to the third seal 143 through the third air inlet channel 133, thereby realizing the transmission of high-pressure gas to the airtight gap through the third seal 143 and realizing the sealing function of the third seal 143.

[0140] Further, in order to transmit the high-pressure gas in the third gas inlet channel 133 to the third sealing member 143, the first fixed sleeve 140 is further provided with a third gas inlet 145, which is arranged opposite to the third sealing member 143. The third gas inlet 145 can be in communication with the third gas inlet channel 133, and the high-pressure gas is transmitted to the third sealing member 143 through the third gas inlet channel 133 and the third gas inlet 145, and then is transmitted to the gas-tight gap through the third sealing member 143, so as to realize the sealing function of the third sealing member 143.

[0141] By arranging the third gas inlet channel 133 on the shell assembly 110 and the third gas inlet 145 on the first fixed sleeve 140, the high-pressure gas can be transmitted to the third sealing member 143 through the third gas inlet channel 133 and the third gas inlet 145, and then is transmitted to the gas-tight gap through the third sealing member 143, so as to realize the sealing function of the third sealing member 143.

[0142] Embodiment Seven

[0143] As shown in Figure 1 , Figure 9 , Figure 10 , Figure 11 and Figure 12 , in a specific embodiment based on any of the above embodiments, the rotating shaft 210 is provided with a limiting step, and the support sealing device 100 further comprises: a limiting disc 160, which is sleeved on the rotating shaft 210; and a fourth sealing member 153, which is sleeved on the rotating shaft 210 and located in the fourth accommodating groove 154 of the second fixed sleeve 150, and the two ends of the limiting disc 160 abut against the limiting step and the fourth sealing member 153, respectively.

[0144] In this embodiment, in order to axially limit the rotating shaft 210, the support sealing device 100 is further provided with the limiting disc 160. Specifically, the rotating shaft 210 is provided with a limiting step, which is arranged at a position close to the second end of the rotating shaft 210. The support sealing device 100 is provided with the limiting disc 160, which is sleeved on the rotating shaft 210, and one side of the support disc directly or indirectly axially supports the limiting step. Further, the support sealing device 100 is further provided with the fourth sealing member 153, which is sleeved on the rotating shaft 210 and abuts against one side of the limiting step of the limiting disc 160 away from the rotating shaft 210. Further, the second fixed sleeve 150 is provided with the fourth accommodating groove 154, and the fourth sealing member 153 is located in the fourth accommodating groove 154. The second fixed member is fixedly arranged in the shell assembly 110, and based on the fact that the second fixed member is fixedly stationary, the fourth sealing member 153 cannot axially move, and thus the rotating shaft 210 can be axially limited by the fourth sealing member 153 and the limiting disc 160, so as to prevent the rotating shaft 210 from moving along the axial direction.

[0145] By setting the limiting disc 160 and the fourth sealing member 153 in the support sealing device 100, and setting the limiting disc 160 between the limiting step of the rotating shaft 210 and the fourth sealing member 153, and axially limiting the fourth sealing member 153 by the second fixing sleeve 150, the rotating shaft 210 can be axially limited by the second fixing sleeve 150, the fourth sealing member 153 and the limiting disc 160 in sequence, so that the rotating shaft 210 remains stable.

[0146] Further, the support sealing device 100 further comprises: a fourth air inlet channel 134 arranged in the housing assembly 110; the second fixing sleeve 150 is further provided with a fourth air inlet 155, the fourth air inlet 155 is arranged opposite to the fourth sealing member 153, and the fourth air inlet channel 134 can transmit the gas with pressure to the fourth sealing member 153 through the fourth air inlet 155.

[0147] In this embodiment, the support sealing device 100 is further provided with a fourth air inlet channel 134, the fourth air inlet channel 134 is arranged in the housing assembly 110, and the fourth air inlet channel 134 can transmit the gas with pressure to the fourth sealing member 153. Specifically, one end of the fourth air inlet channel 134 is in communication with the outside, so that the gas with pressure can be transmitted to the fourth sealing member 153 through the fourth air inlet channel 134, and then the high-pressure gas is transmitted to the air-tight gap through the fourth sealing member 153, so as to realize the sealing function of the fourth sealing member 153.

[0148] By arranging the fourth air inlet channel 134 on the housing assembly 110 and the fourth air inlet 155 on the second fixing sleeve 150, the high-pressure gas can be transmitted to the fourth sealing member 153 through the fourth air inlet channel 134 and the fourth air inlet 155, and then the high-pressure gas is transmitted to the air-tight gap through the fourth sealing member 153, so as to realize the sealing function of the fourth sealing member 153.

[0149] Embodiment eight:

[0150] As shown in Figure 13 and Figure 14 In a specific embodiment based on any of the above embodiments, the support sealing device 100 further comprises: a plurality of supporting members 124, which are respectively arranged on the outer walls of the third sealing member 143 and the fourth sealing member 153.

[0151] In this embodiment, multiple support members 124 are provided on the outer walls of the third seal 143 and the fourth seal 153, wherein the support members 124 protrude from the outer wall of the third seal 143 or the fourth seal 153. Specifically, the support member 124 on the outer wall of the third seal 143 can abut against the inner wall of the third receiving groove 144, and the support member 124 on the outer wall of the fourth seal 153 can abut against the inner wall of the fourth receiving groove 154, thereby transmitting the supporting force to the third seal 143 and the fourth seal 153 through the support member 124, thus providing support for the third seal 143 and the fourth seal 153.

[0152] Example 9:

[0153] like Figure 1 As shown, in a specific embodiment based on any of the above embodiments, the support sealing device 100 further includes: a first support sleeve 170 disposed on the housing assembly 110, the first support sleeve 170 being sleeved on the first fixed sleeve 140 for supporting the first fixed sleeve 140.

[0154] In this embodiment, a first support sleeve 170 is also provided in the support sealing device 100 to limit the first fixing sleeve 140. Specifically, the first support sleeve 170 is sleeved on the first fixing sleeve 140 to fix the first fixing sleeve 140. The first support sleeve 170 is fixedly disposed on the housing assembly 110, thereby enabling the first fixing sleeve 140 to be fixed relative to the housing assembly 110.

[0155] By providing a first support sleeve 170 in the support sealing device 100, the first fixing sleeve 140 can be fixed by the first support sleeve 170 so that the first fixing sleeve 140 can be fixed relative to the housing assembly 110.

[0156] Example 10:

[0157] like Figure 7 and Figure 8 As shown, in a specific embodiment based on any of the above embodiments, any seal 120 includes an air cavity 123, which is arranged circumferentially along the seal 120, and any air cavity 123 can communicate with the corresponding air intake channel 130.

[0158] In this embodiment, each of the seals 120 is further provided with an air cavity 123. Specifically, the air cavity 123 is arranged circumferentially along the seal 120, and the inner wall of the air cavity 123 is recessed into the surface of the seal 120. Each air cavity 123 can communicate with the corresponding air inlet channel 130, thereby allowing high-pressure gas to enter the air cavity 123. Understandably, due to the design of the air cavity structure, the contact area between the high-pressure gas and the seal 120 is increased, thereby making it easier for the high-pressure gas to be transmitted through the seal 120 to the gap between the seal 120 and the rotating shaft 210, thus improving the gas transmission efficiency.

[0159] Specifically, the air chamber 123 on the first sealing member 121 is connected to the first air intake channel 131 through the first air inlet 142, and the air chamber 123 on the second sealing member 122 is connected to the second air intake channel 132 through the second air inlet 152.

[0160] By providing an air chamber 123 on the seal 120, the air intake channel 130 can introduce high-pressure gas into the air chamber 123, increasing the contact area between the high-pressure gas and the seal 120. This allows the high-pressure gas to be more easily transmitted through the seal 120 to the gap between the seal 120 and the rotating shaft 210, so as to adjust the air pressure in the airtight gap by using high-pressure gas.

[0161] Example 11:

[0162] like Figure 4 As shown, in a specific embodiment based on any of the above embodiments, a first connecting cavity 146 is further provided in the first fixed sleeve 140. The first connecting cavity 146 is located between the first receiving groove 141 and the third receiving groove 144, and the first connecting cavity 146 communicates with the first receiving groove 141 and the third receiving groove 144, so as to form a limiting structure in the first fixed sleeve 140, and to axially limit the first sealing member 121 and the third sealing member 143 through the limiting structure.

[0163] Example 12:

[0164] A second aspect of the present invention also provides a compressor 200, comprising: a support sealing device 100 as provided in the first aspect of the present invention; and a rotating shaft 210, which passes through the support sealing device 100 and is rotatable relative to the support sealing device 100.

[0165] The compressor 200 proposed in this application includes a support sealing device 100 and a rotating shaft 210. The rotating shaft 210 is inserted into the support sealing device 100 and can rotate relative to the support sealing device 100 under the drive of an external force.

[0166] The compressor 200 provided in the second aspect of the present invention has all the beneficial effects of the support sealing device 100 proposed in the first aspect of the present invention because it includes the support sealing device 100.

[0167] Example 13:

[0168] like Figure 1 As shown, in another specific embodiment based on embodiment 12, the compressor 200 further includes: a plurality of air guides 220, which are arranged one-to-one with the plurality of seals 120 of the supporting sealing device 100. Each air guide 220 is located between the corresponding seal 120 and the outside, and the air guide 220 can guide the outside airflow to the corresponding seal 120.

[0169] In this embodiment, the compressor 200 is provided with multiple air guides 220, each corresponding to a seal 120 in the supporting sealing device 100. Specifically, there can be two air guides 220, located at opposite ends of the compressor 200. Furthermore, each air guide 220 is positioned between the corresponding seal 120 and the outside environment. When the air guide 220 is in operation, it guides the airflow direction, specifically directing the airflow towards the corresponding seal 120. Because the airtight gap between the seal 120 and the rotating shaft 210 provides a sealing effect, airflow cannot flow into the receiving cavity 111 through the airtight gap, thus preventing leakage in the compressor 200 and achieving the ideal state of theoretically zero leakage.

[0170] Furthermore, the compressor 200 also includes a plurality of external seals 230, which are respectively provided in correspondence with a plurality of air guides 220, and each external seal 230 is disposed between the corresponding air guide 220 and the housing assembly 110 supporting the sealing device 100.

[0171] In this embodiment, the compressor 200 is also provided with a plurality of external seals 230, and the external seals 230 are provided in a one-to-one correspondence with the air guides 220. Each external seal 230 is disposed between the corresponding air guide 220 and the housing assembly 110 of the supporting sealing device 100, thereby sealing the gap between the air guide 220 and the housing assembly 110 through the external seals 230, improving the airtightness of the compressor 200 and reducing the leakage of the compressor 200.

[0172] Furthermore, the compressor 200 also includes: a stator 240, including a rotor cavity 241, the stator 240 being located within the receiving cavity 111 of the housing assembly 110; and a rotor 250, located within the rotor cavity 241, the rotor 250 being connected to a rotating shaft 210, the rotating shaft 210 being able to drive the rotor 250 to rotate relative to the stator 240.

[0173] In this embodiment, the compressor 200 further comprises a stator 240 and a rotor 250, wherein the stator 240 comprises a rotor cavity 241, the stator 240 is located in the containing cavity 111, the rotor 250 is located in the rotor cavity 241, the rotating shaft 210 is connected with the rotor 250, and the rotating shaft 210 can drive the rotor 250 to rotate relative to the stator 240 under the condition that the rotating shaft 210 rotates.

[0174] Further, the compressor 200 further comprises a first bearing 211 sleeved on the rotating shaft 210, and the first bearing 211 and the first sealing piece 121 in the support sealing device 100 are respectively located on both sides of the stator 240 along the axial direction of the rotating shaft 210; and a second support sleeve 212 is arranged on the shell assembly 110, the second support sleeve 212 is sleeved on the first bearing 211, and the first bearing 211 is supported by the second support sleeve 212.

[0175] In this embodiment, the compressor 200 further comprises a first bearing 211 sleeved on the rotating shaft 210 away from the first sealing piece 121, so that the rotating shaft 210 can be stably maintained by the first bearing 211 and the first sealing piece 121 and the third sealing piece 143 respectively supported on both ends of the rotating shaft 210.

[0176] Further, the compressor 200 further comprises a second support sleeve 212 fixedly arranged on the shell assembly, and the first bearing 211 can be supported by the second support sleeve 212, so that the first bearing 211 is stably maintained, and the rotating shaft 210 is stably maintained.

[0177] Further, the compressor 200 further comprises a second bearing 213 sleeved on the rotating shaft 210, and the second bearing 213 is located between the second support sleeve 212 and the limiting disc 160 of the support sealing device 100.

[0178] In this embodiment, the compressor 200 further comprises a second bearing 213 sleeved on the rotating shaft 210, and the second bearing 213 is located between the second support sleeve 212 and the limiting disc 160 of the support sealing device 100, so that the rotating shaft 210 is axially limited by the second bearing 213, the limiting disc 160 of the support sealing device 100 and the fourth sealing piece 153, the axial movement of the rotating shaft 210 is ensured, and the rotating shaft 210 is stably maintained by the plurality of components.

[0179] Embodiment fourteen:

[0180] The third aspect of the present application further provides an air conditioner, which comprises the support sealing device 100 provided by the first aspect of the present application or the compressor 200 provided by the second aspect of the present application.

[0181] The air conditioner provided by the third aspect of the present application has all the advantages of the support sealing device 100 or the compressor 200.

[0182] Embodiment fifteen:

[0183] The present application provides a support sealing device 100 with sealing function and a compressor 200 with the same, wherein the compressor 200 has the structure as shown in Figure 1 .

[0184] The compressor 200 mainly consists of a rotor 250, a stator 240 and a housing assembly 110, wherein the rotor 250 is further provided with air guide members 220, one of which is further provided with a sealing member between the air guide member 220 and a flow guide member 260, and the sealing member is a porous static pressure gas sealing ring; the other air guide member 220 is provided with a sealing member between the air guide member 220 and the housing assembly 110, and the sealing member is also a porous static pressure gas sealing ring.

[0185] The rotor 250 is installed on a rotating shaft 210, which is supported by a first sealing member 121, a third sealing member 143 and a first bearing 211, and the structure of the first sealing member 121 and the third sealing member 143 is as shown in Figure 2 , and the first sealing member 121 and the third sealing member 143 are arranged in a first fixed sleeve 140. The third sealing member 143 mainly provides bearing force, and the first sealing member 121 provides rear end sealing function and can also provide certain bearing force. Further, since the third sealing member 143 has a large area, a support member 124 is designed to improve the overall strength. The first fixed sleeve 140 is designed with a first accommodating groove 141 for installing the first sealing member 121, and is further provided with a third accommodating groove 144 for installing the third sealing member 143, and the first accommodating groove 141 and the second accommodating groove 151 are separated by a first connecting cavity 146. The first fixed sleeve 140 is designed with a first air inlet 142 and a third air inlet 145 for supplying air to the first sealing member 121 and the third sealing member 143 respectively, and the air enters from the first air inlet passage 131 and the third air inlet passage 133 which are previously opened on the housing assembly 110, and the air inlet pressure of the two can be adjusted respectively.

[0186] The rotating shaft 210 is further provided with a limiting disc 160, and the limiting disc 160 is further provided with a second bearing 213 and a fourth sealing member 153 on both sides for balancing the axial force. The structure of the fourth sealing member 153 is as shown in Figure 10As shown, the fourth seal 153 is arranged in the second fixing sleeve 150, and the second seal 122 is also arranged in the second fixing sleeve 150, and the second seal 122 is sleeved on the rotating shaft 210. The fourth seal 153 mainly plays a bearing role, the second seal 122 mainly plays a rear end shaft sealing role, and can provide a certain bearing capacity. Since the area of the fourth seal 153 is large, the support 124 is designed on the fourth seal 153. The second seal 122 is provided with the air cavity 123 to uniformly input air pressure. The second fixing sleeve 150 is designed with the second accommodating groove 151 and the fourth accommodating groove 154, which are used for arranging the second seal 122 and the fourth seal 153 respectively. The second fixing sleeve 150 is also designed with the second air inlet 152 and the fourth air inlet 155, which are used for supplying air to the second seal 122 and the fourth seal 153 respectively, so that the air supply pressures of the second seal 122 and the fourth seal 153 can be adjusted respectively.

[0187] The first bearing 211 and the second bearing 213 are both conventional bearings, and thus will not be described here.

[0188] The sealing principle of the support sealing device 100 is shown in the figure. Figure 15 High-pressure gas flows along the gap between the air guide 220 and other parts of the compressor 200 to the first seal 121 or the second seal 122, as shown by the arrows in the figure. External high-pressure gas has a tendency to enter the air-tight gap between the seal 120 and the rotating shaft 210. Since the air film formed by the high-pressure gas in the air-tight gap hinders the flow of external gas, the theoretical leakage effect is 0. Further, the air supply pressures of the first seal 121 and the second seal 122 can be adjusted according to different working conditions, so that the entire support sealing device 100 can achieve an optimal working state.

[0189] Further, the first seal 121 and the second seal 122 are arranged at the two ends of the rotating shaft 210. Since the first seal 121 and the second seal 122 can additionally provide a certain bearing capacity, the length of the cantilever end of the rotating shaft 210 is reduced, and the running stability of the rotating shaft 210 is improved.

[0190] In the present application, the term "a plurality of" refers to two or more, unless otherwise explicitly limited. The terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, "connecting" can be fixed connection, or detachable connection, or integrally connected; "connecting" can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0191] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "certain embodiments", and the like is intended to indicate that the described implementation, feature, structure, material or characteristic is included in at least one embodiment or example of the application. The illustrative representations of the above terms in the specification are not necessarily referring to the same embodiment or example. Moreover, the described implementation, feature, structure, material or characteristic can be combined in any one or more embodiments or examples in a suitable manner.

[0192] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. The present application can have various modifications and changes for those skilled in the art. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A support seal apparatus, characterized by, The support sealing device can support the rotating shaft, and the support sealing device comprises: a housing assembly comprising a containing cavity; a plurality of sealing members sleeved on the rotating shaft, and an airtight gap being left between any one of the sealing members and the rotating shaft; a plurality of air inlet channels provided on the housing assembly, the air inlet channels being provided in one-to-one correspondence with the sealing members, and any one of the air inlet channels being capable of transmitting gas with pressure through the corresponding sealing member into the corresponding airtight gap so that the airtight gap can block external gas; the air pressure between any one of the sealing members and the rotating shaft being greater than the external air pressure to achieve gas sealing of the containing cavity; any one of the sealing members comprising a gas cavity provided along the circumference of the sealing member, and any one of the gas cavities being capable of communicating with the corresponding air inlet channel; wherein the sealing members are made of porous material.

2. The support seal apparatus of claim 1, wherein, The plurality of sealing members comprise: a first sealing member sleeved on a first end of the rotating shaft; a second sealing member sleeved on a second end of the rotating shaft away from the first end.

3. The support seal apparatus of claim 2, wherein, Further comprising: a first fixing sleeve provided on the housing assembly, the first fixing sleeve comprising a first containing groove, and the first sealing member being provided in the first containing groove; a second fixing sleeve provided on the housing assembly, the second fixing sleeve comprising a second containing groove, and the second sealing member being provided in the second containing groove.

4. The support sealing device according to claim 3, wherein: the first fixing sleeve is provided with a first air inlet, and the first air inlet is provided opposite to the first sealing member; the second fixing sleeve is provided with a second air inlet, and the second air inlet is provided opposite to the second sealing member; the plurality of air inlet channels comprise: a first air inlet channel in communication with the first air inlet; a second air inlet channel in communication with the second air inlet.

5. The support seal apparatus of claim 3, wherein, Further comprising: a third sealing member sleeved on the rotating shaft, the first fixing sleeve comprising a third containing groove, and the third sealing member being located in the third containing groove, and the first sealing member being located between the third sealing member and the external environment.

6. The support sealing device according to claim 5, wherein: the axial length of the third sealing member is greater than the axial length of the first sealing member.

7. The support seal apparatus of claim 5, wherein, Further comprising: a third air inlet channel provided on the housing assembly; the first fixing sleeve is further provided with a third air inlet, the third air inlet is provided opposite to the third sealing member, and the third air inlet channel is capable of transmitting gas with pressure to the third sealing member through the third air inlet.

8. The support seal apparatus of claim 5, wherein, The rotating shaft is provided with a limiting step, and the support sealing device further comprises: a limiting disc sleeved on the rotating shaft; a fourth sealing member sleeved on the rotating shaft, the fourth sealing member being located in a fourth containing groove of the second fixing sleeve, and the two ends of the limiting disc being respectively abutted against the limiting step and the fourth sealing member.

9. The support seal apparatus of claim 8, wherein, Further comprising: a fourth air inlet channel provided on the housing assembly; the second fixing sleeve is further provided with a fourth air inlet, the fourth air inlet is provided opposite to the fourth sealing member, and the fourth air inlet channel is capable of transmitting gas with pressure to the fourth sealing member through the fourth air inlet.

10. The support seal apparatus of claim 8, wherein, Further comprising: A plurality of supporting members are respectively protruded from the outer walls of the third and fourth sealing members.

11. The support seal apparatus of claim 8, wherein, Further comprising: A first supporting sleeve is arranged in the housing assembly, and the first supporting sleeve is sleeved on the first fixing sleeve to support the first fixing sleeve.

12. A compressor characterized by, Comprising: The supporting and sealing device according to any one of claims 1-11; A rotating shaft is arranged in the supporting and sealing device, and the rotating shaft is capable of rotating relative to the supporting and sealing device.

13. An air conditioner characterized by comprising: Comprising: The supporting and sealing device according to any one of claims 1-11; Or The compressor according to claim 12.

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