High-speed air suspension fan

Abstract

The utility model relates to a high-speed air suspension fan which comprises an air suspension assembly, the air suspension assembly comprises a bearing seat, a top foil, a bump foil and a plurality of elastic pieces, the bearing seat is installed on a machine shell, the top foil is installed on the bearing seat, and a rotating shaft penetrates through the top foil; the bump foil is installed on the side, close to the bearing seat, of the top foil, one end of each elastic piece is installed on the bump foil, the other end of each elastic piece is a free end, and the elastic pieces are evenly distributed in the axial direction of the bump foil. When the bump foil is bent, the free end of the elastic sheet abuts against the bearing seat. According to the high-speed air suspension fan, the rotating shaft penetrates through the top foil, the bump foil sleeves the top foil, one end of the elastic sheet is mounted on the bump foil, and the other end of the elastic sheet abuts against the bearing seat; when the rotating shaft rotates rapidly, a gas lubricating film is formed between the rotating shaft and the top foil, the effect of supporting the rotating shaft is achieved, friction loss is reduced, and the rotating speed is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of air suspension blowers, and particularly to a high-speed air suspension blower. Background Art

[0002] An air suspension blower is a common air-blowing device for industrial use, and is widely used in industries such as textiles, pneumatic tools, part detection, spraying, inflation, fuel cells, etc. At present, the structure of the air suspension blower is complex, the volume is large, and the weight is heavy, making it inconvenient to use. Summary of the Utility Model

[0003] Based on this, it is necessary to provide a high-speed air suspension blower with a compact structure in view of the above problems.

[0004] A high-speed air suspension blower includes a housing, a stator, a rotor assembly and an air suspension assembly. The stator is installed in the housing. The rotor assembly includes a rotating shaft and an impeller. The rotating shaft passes through the housing and the stator, and the impeller is installed at one end of the rotating shaft. The air suspension assembly includes a bearing seat, a top foil, a wave foil and a plurality of elastic pieces. The bearing seat is installed on the housing, the top foil is installed on the bearing seat, and the rotating shaft passes through the top foil. The wave foil is installed on the side of the top foil close to the bearing seat. One end of the elastic piece is installed on the wave foil, and the other end is a free end. The elastic pieces are distributed along the axial and circumferential directions of the wave foil. When the wave foil is bent, the free end of the elastic piece abuts against the bearing seat.

[0005] In one embodiment, the rotor assembly further includes a thrust disk, a first thrust bearing and a second thrust bearing. The thrust disk is installed on the rotating shaft, and the thrust disk is arranged between the first thrust bearing and the second thrust bearing. One end of the impeller abuts against one end of the thrust disk. The rotating shaft passes through the first thrust bearing and the second thrust bearing, and the first thrust bearing is installed at one end of the housing.

[0006] In one embodiment, it further includes a volute casing assembly, which includes a volute casing, an air inlet pipe, a diffuser plate and a volute cover. The volute casing is provided with an air outlet. One end of the air inlet pipe is communicated with the volute casing, and the diffuser plate is installed on the volute casing. The volute cover covers the volute casing and the diffuser plate, and the impeller is accommodated in the space formed by the volute cover and the volute casing. The second thrust bearing is installed at one end of the volute cover away from the volute casing.

[0007] In one embodiment, it further includes a silencing assembly, which includes a conduit, a silencer and a control valve. One end of the conduit is installed at the end of the volute casing where the air outlet is provided, and the other end is communicated with the silencer. The control valve is used to control the operation of the silencer.

[0008] In one embodiment, the casing includes a housing, ribs, a bottom plate and an end cover. The stator is installed inside the housing. The ribs are connected to the outer side of the housing. There are multiple ribs, and each rib is arranged along the circumference of the housing. The end cover and the bottom plate are respectively detachably connected to both ends of the housing.

[0009] In one embodiment, multiple heat dissipation holes are provided at one end of the housing close to the end cover, and each heat dissipation hole is arranged along the circumference of the housing. The bottom plate is provided with multiple through holes, and the through holes communicate with the heat dissipation holes. An air duct is formed between the rotating shaft and the stator, and the heat dissipation holes and the through holes respectively communicate with the air duct.

[0010] In one embodiment, the casing further includes an outer shell, the outer shell is connected to the outer side of the housing, and multiple heat dissipation cavities are provided between the outer shell and the housing.

[0011] In one embodiment, the end cover includes a substrate portion and a mounting portion. The substrate portion is used to seal one end of the housing. The mounting portion is installed at one end of the substrate portion. The rotating shaft passes through the mounting portion, and the bearing seat is installed inside the mounting portion.

[0012] In one embodiment, the air suspension assembly further includes a limiting block and a clamping block. One end of the limiting block abuts against one end of the bearing seat, and the other end abuts against the clamping block. A positioning portion is provided at one end of the mounting portion, and a slot is provided at the other end. One end of the bearing seat abuts against the positioning portion, and the slot is used to accommodate the clamping block.

[0013] In one embodiment, the bottom plate includes a panel portion and a fixing portion. The panel portion is used to seal one end of the casing, and the fixing portion is installed at one end of the panel portion. There are two air suspension assemblies, and the two air suspension assemblies are respectively installed on the fixing portion and the mounting portion.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] In the high-speed air suspension blower of the present utility model, the rotating shaft passes through the top foil, the wave foil is sleeved on the top foil, and one end of the elastic piece is installed on the wave foil and the other end abuts against the bearing seat. When the rotating shaft rotates rapidly, a gas lubricating film is formed between the rotating shaft and the top foil, which plays a role in supporting the rotating shaft. Moreover, the friction loss is reduced and the rotation speed is increased. The top foil bears the radial load from the dynamic pressure gas and deforms. Most of the load is transmitted to the elastic piece through the wave foil, forcing the free end of the elastic piece to deform, thereby improving the bearing capacity. This high-speed air suspension blower has a compact structure, small volume and light weight. The oil-free support technology is adopted, which greatly improves the rotation speed of the rotating shaft. Description of the Drawings

[0016] Figure 1 Structural schematic diagram of a high-speed air suspension fan shown in an embodiment of the present utility model;

[0017] Figure 2 is Figure 1 Cross-sectional view along line A-A in

[0018] Figure 3 is Figure 2 Enlarged view of circle B in

[0019] Figure 4 is Figure 1 Exploded view of the high-speed air suspension fan shown in , in which the impeller, volute assembly and silencing assembly are not shown;

[0020] Figure 5 is Figure 4 Structural schematic diagram of the corrugated foil and the shrapnel in .

[0021] The meanings of the reference numerals in the drawings are as follows:

[0022] 100, high-speed air suspension fan;

[0023] 10, housing; 11, shell; 110, heat dissipation holes; 12, rib; 13, end cover; 131, base plate part; 132, installation part; 133, positioning part; 14, bottom plate; 140, through hole; 141, panel part; 142, fixing part; 15, outer shell; 150, heat dissipation cavity; 20, stator; 30, rotor assembly; 31, rotating shaft; 32, impeller; 33, air duct; 34, thrust disc; 35, first thrust bearing; 36, second thrust bearing;

[0024] 40, air suspension assembly; 41, bearing seat; 42, top foil; 43, corrugated foil; 44, shrapnel; 45, limit block; 46, clamping block; 50, volute assembly; 51, volute; 510, air outlet; 52, intake pipe; 53, diffuser plate; 54, volute cover; 60, silencing assembly; 61, conduit; 62, silencer; 63, control valve. Detailed implementation manners

[0025] In order to make the above objects, features and advantages of the present utility model more obvious and understandable, the following will combine the drawings to make a detailed description of the specific implementation manners of the present utility model. Many specific details are set forth in the following description in order to fully understand the present utility model. However, the present utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0026] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0027] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0028] In the present utility model, unless otherwise clearly specified and defined, the terms "mounted", "connected", "connected to", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0029] In the present utility model, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0030] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there may be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation.

[0031] Please refer to Figures 1 to 5 , a high-speed air suspension fan 100 according to an embodiment of the utility model, includes a housing 10, a stator 20, a rotor assembly 30 and an air suspension assembly 40. The stator 20 is installed in the housing 10. The rotor assembly 30 includes a rotating shaft 31 and an impeller 32. The rotating shaft 31 passes through the housing 10 and the stator 20, and the impeller 32 is installed at one end of the rotating shaft 31. The air suspension assembly 40 includes a bearing seat 41, a top foil 42, a wave foil 43 and a plurality of shrapnel 44. The bearing seat 41 is installed on the housing 10, the top foil 42 is installed on the bearing seat 41, and the rotating shaft 31 passes through the top foil 42. The wave foil 43 is installed on one side of the top foil 42 close to the bearing seat 41. One end of the shrapnel 44 is installed on the wave foil 43, and the other end is a free end. The shrapnel 44 is distributed along the axial and circumferential directions of the wave foil 43. When the wave foil 43 is bent, the free end of the shrapnel 44 abuts against the bearing seat 41. In this high-speed air suspension fan 100, the rotating shaft 31 passes through the top foil 42, the wave foil 43 is sleeved on the top foil 42, one end of the shrapnel 44 is installed on the wave foil 43, and the other end abuts against the bearing seat 41. When the rotating shaft 31 rotates rapidly, a gas lubricating film is formed between the rotating shaft 31 and the top foil 42, which plays a role in supporting the rotating shaft 31. Moreover, the friction loss is reduced and the rotational speed is increased. The top foil 42 bears the radial load from the dynamic pressure gas and deforms. Most of the load is transmitted to the shrapnel 44 through the wave foil 43, forcing the free end of the shrapnel 44 to deform, thereby improving the bearing capacity.

[0032] As Figures 1 to 4As shown, in this embodiment, the housing 10 includes a housing body 11, ribs 12, end caps 13, and a bottom plate 14. The stator 20 is installed inside the housing body 11. Optionally, a plurality of heat dissipation holes 110 are provided at one end of the housing body 11 close to the end cap 13, and each heat dissipation hole 110 is arranged along the circumference of the housing body 11. The ribs 12 are connected to the outer side of the housing body 11, and there are multiple ribs 12, each rib 12 is arranged along the circumference of the housing body 11 to increase the heat dissipation area. The end caps 13 and the bottom plate 14 are respectively detachably connected to both ends of the housing body 11. Optionally, the end cap 13 and the housing body 11, and the bottom plate 14 and the housing body 11 are fixed by screws. Further, the end cap 13 includes a base plate portion 131 and a mounting portion 132. The base plate portion 131 is used to seal one end of the housing body 11. The mounting portion 132 is installed at one end of the base plate portion 131. Further still, a positioning portion 133 is provided at one end of the mounting portion 132, and a slot (not labeled in the figure) is provided at the other end.

[0033] As Figure 4 shown, the bottom plate 14 is provided with a plurality of through holes 140, and the through holes 140 communicate with the heat dissipation holes 110. Optionally, the bottom plate 14 includes a panel portion 141 and a fixing portion 142. The panel portion 141 is used to seal one end of the housing body 11. The fixing portion 142 is installed at one end of the panel portion 141. The through holes 140 are provided in the panel portion 141, and each through hole 140 is arranged around the circumference of the fixing portion 142. Further, a positioning portion is provided at one end of the fixing portion 142, and a slot is provided at the other end. The structures of the mounting portion 132 and the fixing portion 142 are similar and will not be introduced in detail below. In one embodiment, the housing 10 further includes an outer shell 15. The outer shell 15 is connected to the outer side of the housing body 11 to increase the heat dissipation area. A plurality of heat dissipation cavities 150 are provided between the outer shell 15 and the housing body 11 for ventilation. Optionally, the length of the outer shell 15 is shorter than the length of the housing body 11, so as to expose the heat dissipation holes 110 and facilitate gas circulation. In one embodiment, the housing body 11, the ribs 12, and the outer shell 15 are all made of metal materials.

[0034] As Figure 2 shown, the stator 20 is installed inside the housing 10, and one side of the stator 20 abuts against the housing body 11 for heat conduction.

[0035] As Figures 2 to 4As shown, the rotor assembly 30 includes a rotating shaft 31 and an impeller 32. The rotating shaft 31 passes through the housing 10 and the stator 20. Optionally, the rotating shaft 31 passes through the mounting portion 132 and the fixing portion 142. A wind channel 33 is formed between the rotating shaft 31 and the stator 20. The heat dissipation holes 110 and the through holes 140 are respectively connected to the wind channel 33 for ventilation and heat dissipation. The impeller 32 is installed at one end of the rotating shaft 31. In one embodiment, the rotor assembly 30 further includes a thrust disk 34, a first thrust bearing 35 and a second thrust bearing 36. The thrust disk 34 is installed on the rotating shaft 31. The thrust disk 34 is disposed between the first thrust bearing 35 and the second thrust bearing 36. One end of the impeller 32 abuts against one end of the thrust disk 34 to limit the position of the thrust disk 34. The rotating shaft 31 passes through the first thrust bearing 35 and the second thrust bearing 36. The first thrust bearing 35 is installed at one end of the housing 10. Optionally, the first thrust bearing 35 is fixedly installed on the substrate portion 131.

[0036] As Figures 3 to 5 shown, the air suspension assembly 40 includes a bearing housing 41, a top foil 42, a wave foil 43 and a plurality of elastic pieces 44. The bearing housing 41 is installed on the housing 10. Optionally, the bearing housing 41 is installed inside the mounting portion 132. Further, the bearing housing 41 is provided with two fixing grooves (not labeled in the figure). The top foil 42 is installed on the bearing housing 41. Optionally, both ends of the top foil 42 are respectively received in the two fixing grooves. The rotating shaft 31 passes through the top foil 42. The wave foil 43 is installed on the side of the top foil 42 close to the bearing housing 41. One end of the elastic piece 44 is installed on the wave foil 43, and the other end is a free end. The elastic pieces 44 are distributed along both the axial direction and the circumferential direction of the wave foil 43. When the wave foil 43 is bent, the free end of the elastic piece 44 abuts against the bearing housing 41 to provide a supporting force. In one embodiment, the air suspension assembly 40 further includes a limiting block 45 and a clamping block 46. One end of the limiting block 45 abuts against one end of the bearing housing 41, and the other end abuts against the clamping block 46 to fix one end of the top foil 42 and the wave foil 43. One end of the bearing housing 41 abuts against the positioning portion 133. The slot is used to accommodate the clamping block 46 to fix the position of the bearing housing 41.

[0037] In one embodiment, there are two air suspension assemblies 40. The two air suspension assemblies 40 are respectively installed on the fixing portion 142 and the mounting portion 132. Both ends of the rotating shaft 31 respectively pass through the two top foils 42.

[0038] As Figure 1 and Figure 2As shown in the figure, the high-speed air suspension blower 100 further includes a volute assembly 50. The volute assembly 50 includes a volute 51, an air inlet pipe 52, a diffuser plate 53 and a volute cover 54. The volute 51 is provided with an air outlet 510; one end of the air inlet pipe 52 communicates with the volute 51, the diffuser plate 53 is installed in the volute 51. Optionally, one end of the diffuser plate 53 is provided with a plurality of flow guide grooves communicating with the volute 51; the volute cover 54 covers the volute 51 and the diffuser plate 53, and the impeller 32 is accommodated in the space formed by the volute cover 54 and the volute 51; the second thrust bearing 36 is installed at one end of the volute cover 54 away from the volute 51.

[0039] As Figure 1 As shown in the figure, the high-speed air suspension blower 100 further includes a silencing assembly 60. The silencing assembly 60 includes a conduit 61, a silencer 62 and a control valve 63. One end of the conduit 61 is installed at one end of the volute 51 provided with the air outlet 510, and the other end communicates with the silencer 62. The control valve 63 is used to control the operation of the silencer 62; optionally, the control valve 63 is a solenoid valve.

[0040] During use, as the rotating shaft 31 drives the impeller 32 to rotate, the gas enters the volute 51 through the air inlet pipe 52 and is discharged through the air outlet 510 under the action of the diffuser plate 53; at the same time, the silencer 62 is enabled through the control valve 63 to reduce noise. The external cooling air enters the housing 11 through the heat dissipation holes 110, then flows through the air duct 33, and then flows out through the through holes 140, thereby taking away the heat of the rotating shaft 31 and the stator 20; the external cooling air takes away the heat through the heat dissipation cavity 150, and the heat dissipation effect is good. When the rotating shaft 31 rotates rapidly, a gas lubricating film is formed between the rotating shaft 31 and the top foil 42, which plays a role in supporting the rotating shaft 31. Moreover, the friction loss is reduced and the rotation speed is increased; the top foil 42 is deformed under the radial load of the dynamic pressure gas, and most of the load is transmitted to the spring piece 44 through the corrugated foil 43, forcing the free end of the spring piece 44 to deform, thereby improving the bearing capacity. In addition, since the free end of the spring piece 44 generates sliding friction with the bearing seat 41 during deformation, a certain damping is provided, thereby improving the overall stability. Since the corrugated foil 43 and the top foil 42 can be elastically deformed, they can adapt to the slight changes in the size of the rotating shaft 31 caused by centrifugal force, thermal expansion, etc. during the working process.

[0041] The high-speed air suspension blower 100 of the present utility model passes the rotating shaft 31 through the top foil 42, the wave foil 43 is sleeved on the top foil 42, one end of the elastic piece 44 is installed on the wave foil 43, and the other end abuts against the bearing seat 41; when the rotating shaft 31 rotates rapidly, a gas lubrication film is formed between the rotating shaft 31 and the top foil 42, which plays a role in supporting the rotating shaft 31, and moreover, reduces friction loss and increases the rotation speed; the top foil 42 bears the radial load from the dynamic pressure gas and deforms, and most of the load is transmitted to the elastic piece 44 through the wave foil 43, forcing the free end of the elastic piece 44 to deform, thereby improving the load-bearing capacity; the high-speed air suspension blower 100 of the present utility model has a compact structure, small volume and light weight; adopting the oil-free support technology, the rotation speed of the rotating shaft 31 is greatly increased.

[0042] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0043] The above-described embodiments only represent several implementation manners of the present utility model, and the description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several modifications and improvements can still be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the utility model patent shall be subject to the appended claims.

Claims

1. A high-speed air suspension blower, characterized in that, It includes a housing, a stator, a rotor assembly and an air suspension assembly. The stator is installed inside the housing. The rotor assembly includes a rotating shaft and an impeller. The rotating shaft penetrates through the housing and the stator, and the impeller is installed at one end of the rotating shaft. The air suspension assembly includes a bearing seat, a top foil, a wave foil and a plurality of elastic pieces. The bearing seat is installed on the housing, the top foil is installed on the bearing seat, and the rotating shaft penetrates through the top foil. The wave foil is installed on the side of the top foil close to the bearing seat. One end of the elastic piece is installed on the wave foil, and the other end is a free end. The elastic pieces are distributed along both the axial direction and the circumferential direction of the wave foil. When the wave foil is bent, the free end of the elastic piece abuts against the bearing seat.

2. The high-speed air suspension blower according to claim 1, wherein The rotor assembly further includes a thrust disc, a first thrust bearing and a second thrust bearing. The thrust disc is installed on the rotating shaft and is arranged between the first thrust bearing and the second thrust bearing. One end of the impeller abuts against one end of the thrust disc. The rotating shaft penetrates through the first thrust bearing and the second thrust bearing, and the first thrust bearing is installed at one end of the housing.

3. The high-speed air suspension blower according to claim 2, characterized in that, It further includes a volute casing assembly, which includes a volute casing, an air inlet pipe, a diffuser plate and a volute cover. The volute casing is provided with an air outlet. One end of the air inlet pipe is communicated with the volute casing, and the diffuser plate is installed on the volute casing. The volute cover covers the volute casing and the diffuser plate, and the impeller is accommodated in the space formed by the volute cover and the volute casing. The second thrust bearing is installed at one end of the volute cover away from the volute casing.

4. The high-speed air suspension blower according to claim 3, wherein, It further includes a silencing assembly, which includes a conduit, a silencer and a control valve. One end of the conduit is installed at the end of the volute casing where the air outlet is provided, and the other end is communicated with the silencer. The control valve is used to control the operation of the silencer.

5. The high-speed air suspension blower according to claim 1, characterized in that, The housing includes a shell, ribbed bars, a bottom plate and an end cover. The stator is installed inside the shell. The ribbed bars are connected to the outside of the shell, and there are multiple ribbed bars, and each ribbed bar is arranged along the circumference of the shell. The end cover and the bottom plate are respectively detachably connected to both ends of the shell.

6. The high-speed air suspension blower according to claim 5, wherein, One end of the shell close to the end cover is provided with a plurality of heat dissipation holes, and each heat dissipation hole is arranged along the circumference of the shell. The bottom plate is provided with a plurality of through holes, and the through holes are communicated with the heat dissipation holes. An air duct is formed between the rotating shaft and the stator, and the heat dissipation holes and the through holes are respectively communicated with the air duct.

7. The high-speed air suspension blower according to claim 5, wherein, The housing further includes an outer shell, which is connected to the outside of the shell, and there are multiple heat dissipation cavities between the outer shell and the shell.

8. The high-speed air suspension blower according to claim 5, characterized in that The end cover includes a substrate part and an installation part. The substrate part is used to seal one end of the shell. The installation part is installed at one end of the substrate part, the rotating shaft penetrates through the installation part, and the bearing seat is installed inside the installation part.

9. The high-speed air suspension blower according to claim 8, wherein The air suspension assembly further includes a limit block and a clamping block. One end of the limit block abuts against one end of the bearing seat, and the other end abuts against the clamping block. One end of the installation part is provided with a positioning part, and the other end is provided with a slot. One end of the bearing seat abuts against the positioning part, and the slot is used to accommodate the clamping block.

10. The high-speed air suspension blower according to claim 8, characterized in that, The bottom plate includes a panel portion and a fixing portion. The panel portion is used to seal one end of the casing, and the fixing portion is installed at one end of the panel portion. There are two air suspension components, and the two air suspension components are respectively installed on the fixing portion and the installation portion.

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