192 results about "Shaft collar" patented technology

The utility model discloses a crankshaft timing measuring tool which comprises a rack, a gear seat, a support, a fixed ejector pin, a movable ejector pin and a spring. A gear seat, a support, a fixed ejector pin and a movable ejector pin are installed on the machine frame, a shaft ring I is arranged on the movable ejector pin, a spring is sleeved on the movable ejector pin, one end of the spring is contacted with the machine frame, and the other end of the spring is contacted with the end face of the shaft ring I. The gear seat is arranged between the fixed ejector pin and the movable ejector pin, and a gear shaft is supported on the gear seat through a bearing. The gear shaft is perpendicular to the fixed ejector pin, a driving gear meshed with a gear of the crankshaft is arranged on the shaft ring I, and a hand wheel is fixedly installed at the end of the gear shaft. The support is installed on the outer side of the gear seat, a rod aligning hole is formed in the support, a gear aligning rod is arranged in the rod aligning hole and is in clearance fit with the rod aligning hole, and a second gear capable of being meshed with the gear on the crank is arranged at the lower end of the gear aligning rod. The device is simple in structure and low in cost; the operation is simple, and the measurement is accurate.

Rotisserie forks and a basket for use on a motorized elongated spit rod having a central axis and a sharpened tip, wherein the forks or basket have a) a split shaft collar having an opening that slidably receives the spit rod and has an inside diameter, and b) a lever-action quick-release clamp that surrounds the shaft collar, has open and closed lever positions, and moves between its open and closed positions in a direction perpendicular to the spit rod central axis. When open, the lever enables the shaft collar and fork or basket to move along the spit rod central axis. When closed, the lever reduces the shaft collar inside diameter so that the fork or basket does not move along the spit rod central axis during rotisserie grilling. The lever does not lengthen the forks or basket along the spit rod central axis when moved between its open and closed positions.

The utility model relates to the field of bearing production, and discloses an inner ring and outer ring sleeving device for bearing production, which comprises a support plate, a turntable and a rotating shaft, the U-shaped groove is formed in the outer wall of the turntable; an outer shaft ring is placed in the first discharging groove; an inner shaft ring is placed in the second discharging groove; the first discharging opening is formed in the bottom plate, close to one end of the rotating disc, of the second discharging groove; the discharging mechanism is installed on the side edge of the second discharging groove. The second discharging groove is formed above the rotating disc, the first discharging opening is formed corresponding to the U-shaped groove, and the face material mechanism is installed on the side edge of the second discharging groove, so that the rotating disc can rotate the movable shaft through the second fixing block when rotating, and therefore the movable groove pushes the inner shaft ring to fall into the U-shaped groove from the first discharging opening; and the U-shaped groove is provided with the outer shaft ring in front of the second discharging groove, and the inner shaft ring also falls into the outer shaft ring when falling into the U-shaped groove, so that the outer shaft ring and the inner shaft ring are sleeved.

The invention provides a low-concentration hydrochloric acid resource recycling device and a low-concentration hydrochloric acid resource recycling process, and belongs to the field of low-concentration hydrochloric acid recycling treatment. The mixing assembly comprises a shaft sleeve rotationally connected to the top cover, a square pipe is fixedly connected to the bottom of the shaft sleeve, blade assemblies are arranged on the left side and the right side of the square pipe respectively and distributed at equal intervals from top to bottom, and each blade assembly comprises a shaft ring rotationally connected to one side wall of the square pipe; the sides, close to each other, of the outer sides of every two adjacent shaft rings are fixedly connected with first gears correspondingly. By arranging the mixing assembly and the driving assembly, when a stirring shaft rotates along with a uniquely designed square tube, an internal toothed plate can periodically do lifting motion, and the stirring shaft and stirring blades can be driven to do up-and-down swinging motion while revolving along with a shaft sleeve, so that the flow direction of liquid is disrupted, and vortex is avoided; and the mixing effect between different laminar flows is improved.

The utility model provides a conductive roller with an internal cooling structure, which comprises a transmission shaft and a roller mounted on the transmission shaft, first shaft rings are correspondingly arranged on two sides of the transmission shaft, and the first shaft rings on two sides of the transmission shaft are hermetically connected with two sides of the roller; a second shaft ring is correspondingly arranged on one side of the transmission shaft in the roller, an annular first cooling liquid cavity is correspondingly formed between the second shaft ring and the first shaft ring close to one side, and an annular second cooling liquid cavity is correspondingly formed between the second shaft ring and the first shaft ring far away from the other side; a spiral cooling liquid channel is correspondingly machined in the roller wall of the roller, and one end of the spiral cooling liquid channel communicates with the interior of the first cooling liquid cavity. The conductive roller provided by the utility model is relatively rapid and uniform in cooling and relatively good in cooling effect, the condition of non-uniform cooling of the conductive roller caused by relatively large temperature difference of cooling liquid flowing through two sides of the conductive roller is well avoided, and the conductive roller is high in practicability.

The invention provides automatic shaft collar correction equipment and method, and relates to the technical field of machining, the automatic shaft collar correction equipment comprises a supporting and correcting station and a conveying station, the supporting and correcting station is provided with a workpiece base and a supporting and correcting device used for achieving radial supporting and tightening of an annular piece, and the supporting and correcting device comprises a plurality of supporting blocks capable of being opened or closed, a screw matched with the supporting blocks and a driving mechanism; the conveying station is provided with a clamping assembly, the clamping assembly comprises a lifting table, a guide plate sliding transversely, a gear motor and a clamp used for clamping the annular parts, and automatic conveying and positioning of the annular parts are achieved. The supporting and correcting device comprises a shell, a guide sleeve, a guide piece, a linkage mechanism composed of a moving block and a transmission rod, a screw rod rotates to drive a supporting block to expand or contract in the radial direction, and automatic correction of the annular piece is completed. The device is reasonable in structure, efficient in operation and suitable for automatic positioning and correction machining of shaft ring type workpieces, and the automation level and the correction precision can be remarkably improved.

The utility model provides a cleaning water recovery device for primary processing of agricultural products, which relates to the technical field of primary processing of agricultural products and comprises a device body, a partition plate is arranged on the inner side of the device body, a fixed frame is arranged at the top of the partition plate, a motor is arranged on the inner side of the fixed frame, and the bottom of the motor is connected with a rotating shaft. One end of the rotating shaft movably penetrates through the partition plate and is rotationally connected with a limiting shaft ring, and a plurality of stirring fan blades are mounted on the outer side of the rotating shaft. Through the arrangement of the motor, the limiting shaft ring and the stirring fan blades, the motor is fixed and protected through the fixing rack, the stable operation of the motor is maintained, meanwhile, the service life of the motor is prolonged, the rotating shaft is driven by the motor, then the stirring fan blades are driven by the rotating shaft to rotate, cleaning water and a neutralizer can be stirred and mixed, and the cleaning effect is improved. And the rotating shaft can be limited through the limiting shaft ring, so that the rotating shaft is prevented from slipping, and the stability is improved.

The utility model discloses a low collar positioning tool, relates to low collar technical field, two sets of low collar main body, two sets of low collar main body are provided with first butt joint hole, second butt joint hole, third butt joint hole and fourth butt joint hole, the inner wall of two sets of first butt joint hole is movably equipped with the fixed bolt, and the inner wall of the second butt joint hole is movably equipped with the fixed bolt. And telescopic columns are movably mounted in the two sets of third butt joint holes correspondingly, and the two sets of telescopic columns are movably connected with the two sets of fixing bolts correspondingly. Through the arrangement of the first butt-joint holes, the second butt-joint holes, the third butt-joint holes, the fourth butt-joint holes, the fixing bolts and the telescopic columns, the two fixing bolts move, one ends of the two fixing bolts move into the two second butt-joint holes respectively, and one ends of the two telescopic columns move into the two fourth butt-joint holes respectively. And the two ends of the two sets of low collar bodies are fixedly connected, so that the situation that the low collar is frequently loosened in the working process is avoided, and the using effect of the low collar is further improved.

A shaft grounding system for rotating electrical machinery includes a collar attachable to the shaft and presenting a circumferential contact surface of a first metal. A stator securable to the machine housing carries at least one resiliently biased contact element of a second metal that wipes against the contact surface to conduct unwanted charge from the shaft to ground. In preferred embodiments the metals are dissimilar and at least one is a noble metal. The system may incorporate multiple contact surfaces, modular contact elements and an on-board monitoring subsystem that provides local and remote diagnostics.

The utility model provides an end face sealing structure of a screw air compressor, which relates to the technical field of screw air compressors and comprises a machine body and a sealing structure. An end cover is fixedly connected to one end of the machine body, an inlet is formed in the top of the end cover, an outlet is formed in the bottom of the machine body, a sealing structure is arranged at the end of the machine body, and the sealing structure comprises a connecting protruding column fixedly connected to the end of the machine body, and an assembling ring groove is formed in the inner side wall of the connecting protruding column; the fixed inner ring is fixedly connected into the assembly ring groove, mounting carrying grooves are formed in the two sides of the assembly ring groove, through the arrangement of the sealing structure, the attaching shaft ring and the rotating belt shaft are made of special materials, the sealing contact faces of the attaching shaft ring and the rotating belt shaft can be tightly attached after precision machining, leakage of compressed air is effectively reduced, and the service life of the rotating belt shaft is prolonged. Meanwhile, under the action of the elastic piece, the pre-tightening force can be automatically adjusted according to the abrasion condition of the sealing face, it is guaranteed that the sealing face is tightly attached all the time, and the sealing performance is greatly improved.

A vehicle transaxle comprising a plurality of mounting flanges fixedly mountable to an axle tube of the vehicle absent any additional structure for mounting the transaxle to the vehicle. The axle tube houses a wheel axle to which the transaxle is operably couplable. The transaxle additionally comprises a transaxle mounting collar that is fixedly mounted to or integrally formed with a housing of the transaxle. The mounting collar is structured and operable to have a prime mover of the vehicle mounted thereto and to support the weight / mass of the prime mover such that the prime mover is mountable to the vehicle via only the mounting collar absent any additional structure for mounting the prime mover to the vehicle such that the prime mover can be cantilevered from (e.g., suspended from) the transaxle, e.g., the prime mover is ‘free floating’.

The invention provides an integral track gearbox. The gearbox comprises an input gear shaft assembly, a gear shifting shaft assembly, a speed changing shifting fork assembly, a speed changing shaft assembly, a steering shaft assembly, an idle shaft assembly, a left output shaft assembly, a right output shaft assembly and a gearbox shell. The gear shifting shaft assembly is composed of a gear shifting shaft, a third bearing, a gear shifting main gear, a first-gear gear, a first needle bearing, a first needle bearing inner ring, a first spline housing, a first gear switch, a third-gear gear, a second needle bearing, a second needle bearing inner ring, a first spacer bush, a second-gear gear, a third needle bearing, a third needle bearing inner ring, a second spline housing, a second gear switch, a gear shifting shaft collar and a fourth bearing. Accumulated errors are eliminated, the part installation position precision is improved, and the operation performance is improved; the maintenance efficiency is improved and the maintenance cost is reduced; the strength performance of the gearbox assembly is improved; the failure rate of crawler driving wheel parts is reduced, and the safety performance is improved; machining difficulty of the track driving wheel is reduced, cost is saved, and efficiency is improved.

Planetary gear set with a planet carrier (5) and a planet gear shaft (2), wherein one area of ​​the planetary support (5) is shaped as a first cheek, wherein the first cheek has an axially through recess into which the planet gear axis (2) is at least partially inserted, characterized by the fact that an axially directed threaded bore is provided in the end face of the planet gear shaft (2), wherein a screw (4) is screwed into the axially directed threaded bore, so that a spring element (6) is pre-tensioned, which secures the screw connection between screw (4) and planet gear shaft (2), wherein the area axially covered by the screw (4) overlaps at least with the axial area covered by the recess, wherein the spring element (6) is pre-tensioned and / or presses against the wall of the recess, wherein a planet gear (1) is rotatably mounted on the planet gear axis (2) by means of a bearing, wherein the planet gear (1) is positioned against a collar of the planet gear axle (2), wherein the screw (4) has a screw head, wherein the spring element (6) is arranged axially between the screw head and the end face of the planet gear shaft (2), wherein the spring element (6) is designed as a perforated disc, the axially covered area of ​​which shifts monotonically in the axial direction with increasing radial distance from the screw axis and / or central axis of the planet gear axis (2), wherein the outer edge of the perforated disc touches the wall of the recess and the inner edge of the perforated disc touches the screw (4), wherein the planet gear axle (2) has a collar with which it is positioned against the planet carrier (5), namely against an edge of the recess of the planet carrier (5).

The utility model relates to a tension roller reliable in work and a tension roller device adopting the tension roller, a roller body cooling structure is arranged in a roller body of the tension roller, a sealing type bearing seat is arranged in the roller body, and a limiting shaft ring and a sealing core shaft are arranged on one side, away from the roller body, of the sealing type bearing seat. The limiting shaft rings are fixedly connected with the corresponding shaft heads and abut against the sealing type bearing seats. The sealing mandrels are fixedly connected to the corresponding shaft heads, mandrel gaps are formed between the sealing mandrels and the limiting shaft rings, water collecting grooves are formed in the mandrel gaps, at least one lip-shaped water seal is arranged on each of the two sides of each water collecting groove, and a medium backflow channel of the roller body cooling structure is communicated with the water collecting grooves. The lip-shaped water seals are arranged on the two sides of the water collecting tank respectively, in the rotating process of the tension roller, return cooling water does not enter the bearing seat, the long service life is kept, dry oil is injected for lubrication and sealing, the dry oil polluted by water can be directly discharged out of the tension roller through the water collecting tank, and therefore the working reliability of the tension roller can be effectively improved.

The invention relates to a clutch unit for reversibly coupling a drive side (2) to an output side (3) of a drive train, comprising a linearly displaceable shift collar (8), which sits on a drive element (4) of the drive side (2) and engages into an external toothing (5) of the drive element (4) by means of an internal toothing (9), the internal toothing (9) has an external toothing (5), and the shift collar (8) can be shifted along the external toothing (5) via an output element (6) of the output side (3) from an uncoupled position into a coupled position by also engaging the internal toothing (9) into an external toothing (7) of the output element (6), an actuator (10) being provided for shifting the shift collar (8), the actuator has a linearly movable piston (13) and a shift lever (17) coupled to the piston (13) and connected to the shift collar (8), the piston being guided in a pot-shaped cylindrical part (12) formed from a sheet metal, the cylindrical part having, on one side, a guide section through which the shift lever (17) passes, according to the invention, the cylindrical part (12) is closed on the other side by a cover (14) having a guide hole through which the shift lever (17) passes, and wherein, in the assembled state, the cylindrical part (12) is inserted into a conformally shaped recess (35) in the wall (11) of the transmission.

A hydraulic cylinder for a work vehicle includes a cylinder extending between a first end and a second end. The cylinder includes a retention member positioned adjacent to the first end. The retention member includes threaded openings. A rod is disposed in the cylinder. A scraper assembly circumscribes the cylinder and the rod. The scraper assembly includes a collar arranged at the first end of the cylinder. The collar includes a first face surface and a second face surface. The collar includes a plurality of openings extending through the first face surface and the second face surface. A scraper ring is supported by the collar. A plurality of fasteners join the collar to the cylinder. Each of the plurality of fasteners extend through a corresponding one of the plurality of openings in the collar and engage a corresponding one of the plurality of threaded openings in the retention member.

The invention discloses a novel angle grinder with a quick accessory replacement function, and relates to the technical field of angle grinders. A novel angle grinder with a quick accessory replacement function comprises a body, the body comprises a motor bin, an accessory mechanism is installed on the motor bin, and a main shaft mechanism is arranged between the accessory mechanism and the body; the accessory mechanism comprises an accessory, a connecting ring assembly is embedded in a center hole of the accessory, the connecting ring assembly comprises a connecting ring, an inserting block is fixedly connected into the connecting ring, and inclined grooves are formed in the two sides of the inserting block. The main shaft mechanism comprises a main shaft; the main shaft mechanism is provided with a shaft ring mechanism matched with the connecting ring assembly in a matched mode, the shaft ring mechanism comprises a shaft ring fixedly connected with the main shaft in a sleeving mode, protruding blocks matched with the inserting blocks in an embedded mode are evenly and fixedly connected to the outer side of the shaft ring at equal intervals, and the two sides of each protruding block are each provided with a communicated side groove. During compression assembly, the assembly efficiency is improved.

The utility model discloses a batten mechanical manual expansion shaft, and relates to the technical field of manual expansion shafts, an expansion shell is provided with uniformly distributed circumferentially arranged sliding chutes, the right end of the expansion shell is provided with a rotating flange, the rotating flange is internally and rotatably connected with a bearing, the left end of the expansion shell is rotatably connected with a driving shaft ring, and the driving shaft ring is rotatably connected with the expansion shell. A driving shaft device is rotationally connected to the bearing and the driving shaft collar and comprises a driving shaft, the right end of the driving shaft is sleeved with a reset spring, a driving thread is arranged at the left end of the driving shaft, a sliding long shaft sleeve device is slidably connected to the driving shaft, and a movable block device is arranged on the sliding long shaft sleeve device; the movable block device is slidably connected with an expansion block device, the expansion block device is slidably connected with the sliding groove, the expansion block device is connected with a positioning plate device, the device does not need to be driven by air pressure and can be manually driven or mechanically driven by a motor, the applicability of the device is greatly improved, in addition, the positioning plate device capable of being flexibly changed is arranged, and the positioning plate device can be flexibly changed. And the applicability of the device is further improved.

The utility model relates to the technical field of drilling equipment, in particular to a drill rod eccentric lifting adjusting device which comprises a driving motor, a rotary clamping groove shaft, a T-shaped lead screw, a universal connecting piece and an eccentric shaft collar. One end of the rotary clamping groove shaft is in transmission connection with the driving motor, and the other end is provided with an open clamping groove; one end of the T-shaped lead screw is connected with the clamping groove in a clamped mode, and the T-shaped lead screw can be driven by rotation of the rotary clamping groove shaft to achieve spiral lifting motion. One end of the universal connecting piece is universally and movably connected with the T-shaped screw rod, and the other end forms a lifting end; the eccentric shaft ring is correspondingly arranged on the periphery of the butt joint ends of the two drill rods in a sleeving mode, and a ring body is connected with the lifting end. When the T-shaped lead screw spirally ascends and descends, the eccentric shaft ring can be driven by the universal connecting piece to ascend and descend, so that the concentric state of the drill rod is adjusted. The drill rod eccentric lifting adjusting device can smoothly and stably achieve lifting motion of the eccentric shaft ring, the eccentric shaft ring is prevented from spinning, and the accurate adjusting effect on the concentricity of the two drill rods is fully guaranteed.

The utility model discloses a manual corrugated pipe valve which comprises a valve body, a lower valve rod, a corrugated pipe assembly, a valve cover, an upper valve rod and a hand wheel, a limiting step face is arranged in the middle of the length direction of the lower valve rod, the manual corrugated pipe valve further comprises a guide sleeve, and the guide sleeve is arranged on the lower valve rod in a sleeved mode and enables the lower valve rod to move axially relative to the guide sleeve. The lower end of the guide sleeve is inserted between the corrugated pipe assembly and the lower valve rod, the upper end of the guide sleeve is provided with a guide sleeve flange, the guide sleeve flange extends out of the upper part of the shaft ring, and the valve cover presses the shaft ring on the valve body flange through the guide sleeve flange; when the hand wheel is rotated clockwise to drive the lower valve rod to move upwards, a corrugated pipe of the corrugated pipe assembly is compressed; when the limiting step surface on the lower valve rod touches the lower end of the guide sleeve for limiting, the lower valve rod cannot be moved upwards continuously to compress the corrugated pipe, so that the manual corrugated pipe valve is prevented from being opened excessively, the reliability of the manual corrugated pipe valve is improved, the service life of the manual corrugated pipe valve is prolonged, and the corrugated pipe is prevented from being deformed and abraded.

The invention discloses a coaxial dual-rotor unmanned aerial vehicle. The coaxial dual-rotor unmanned aerial vehicle sequentially comprises a GPS assembly, a control assembly, a stabilizing assembly, a detachable battery assembly, an undercarriage and a shooting device from top to bottom, the GPS assembly comprises a bin cover, and a GPS positioner is arranged in the bin cover; the control assembly comprises a shell, motor mounting frames are arranged on the upper portion and the lower portion in the shell correspondingly, an upper disc type motor and a lower disc type motor are arranged on the motor mounting frames correspondingly, a supporting column is arranged between the center of the upper disc type motor and the center of the lower disc type motor for fixed connection, and an output shaft of the upper disc type motor is sleeved with a shaft ring. Upper connecting pieces are arranged on the left side and the right side of the shaft ring, upper rotor wings are arranged on the upper connecting pieces, and the outer portion of an output shaft of the lower disc type motor is connected with a rotating ring and a stabilizing assembly in a sleeving mode. The upper and lower disc type batteries are fixedly connected by arranging the supporting column, and meanwhile, the stability of the disc type motor during rotation is improved by arranging the stabilizing assembly, namely, the rotation stability of the rotor wing is improved.

The utility model discloses a fan assembly and a duct type air conditioner, and belongs to the technical field of air conditioners. The fan assembly comprises a motor, a fan, a fixing piece and a fastening piece. The fan comprises a shaft ring extending in the axial direction of the fan, and the shaft ring is provided with a penetrating part used for allowing a driving shaft connected with the motor to penetrate through; the avoiding part is arranged on the side wall of the shaft ring, and the avoiding part communicates with the penetrating part; the fixing piece is connected to the shaft ring and comprises an end plate, a connecting piece and a connecting piece, and the driving shaft is sleeved with the end plate. The platform part is connected with the end plate and is positioned on the outer side of the shaft ring; the inserting part is connected to the side, away from the end plate, of the platform part, and the inserting part is inserted into the fan so as to limit rotation of the inserting part relative to the fan; and the fastening piece is in threaded connection with the platform part and penetrates through the avoiding part, and the end of the fastening piece abuts against the driving shaft so as to abut against the driving shaft. The duct type air conditioner comprises the fan assembly. According to the fan assembly and the duct type air conditioner, the connection between the shaft and the fan is simplified, and the cost is reduced.

A kind of position signal indicating device for totally enclosed electric gate valve, including stator, rotor, permanent magnet, magnetic column, magnetic disk, screw plug, stator coil etc.;Its characterized in that: the stator of the valve position signal indicating device is embedded in the base of electric transmission device, uses elastic shaft collar for axial positioning, the rotor, i.e.the output gear shaft of electric transmission device is hollow structure, the permanent magnet is distributed in the light hole of the stator, magnetic column is evenly arranged in the specific plane in the radial direction of rotor, the magnetic disk moves linearly along the axis of hollow rotor by ball screw, the screw plug is cylindrical structure, outer cylindrical surface is provided with thread, is fixed in the threaded hole of the stator by threaded connection.

Drilling devices, systems, kits and methods for drilling cartilage defects are disclosed. A system includes a handle device having an adjustable shaft collar rotatable to adjust a drill set distance between the adjustable shaft collar and the handle. The handle device can include a distal drill guide extending from the handle at an end opposite the adjustable shaft collar. The system includes a drill collar attachable to a drill bit and configured to remain stationary along a length of the drill bit once attached. The system includes a rotatable disk positionable between the adjustable shaft collar and the drill collar. The rotatable disk can include a central hole sized to accept the drill bit.

Braking device (5) for a caliper brake, comprising a ball screw drive mechanism provided with a nut (24) which comprises a central collar (404) for transmitting axial forces. Floating caliper brake equipped with such a device (5).

The present invention relates to a torque sensor structure using an axial magnetic circuit, the torque sensor structure includes an input rotor assembly, an output rotor assembly and a measuring assembly, the input rotor assembly and the output rotor assembly are respectively mounted on an input shaft and an output shaft connected by a torsion bar; the input rotor assembly includes an axially magnetized multi-pole magnetic ring, a bracket, spokes and an input shaft ring sleeve, the spokes are arranged on the bracket, and the bracket is arranged between the input shaft ring sleeve and the axially magnetized multi-pole magnetic ring; the output rotor assembly includes a magnetic flux converging ring, a bracket and an output shaft ring sleeve; the magnetic flux converging ring is arranged at both ends of the bracket, and the measuring assembly includes a magnetic flux buncher and a magnetic sensitive element, and the magnetic flux buncher and the magnetic sensitive element are axially arranged between the magnetic flux converging ring. This solution can enable the axial magnetic circuit type sensor to be industrially applied, significantly improve the acquisition efficiency of the torque angle signal, and optimize the signal-to-noise ratio.

The invention relates to a turbomachine comprising: a first separation lip capable of separating an incoming air flow into a radially inner air flow and a secondary air flow; a second separation lip capable of separating the radially inner air flow into a main flow and a tertiary flow, the tertiary flow flowing through a tertiary flow passage, the tertiary flow passage being radially outer of a main flow passage through which the main flow passes; a heat exchanger (18) arranged in the third-stage flow channel; and an inner housing (28); notably, the exchanger comprises an upstream portion (50) comprising a collar (52) extending upstream from the body (32) of the exchanger in a protruding manner, said collar being housed in a floating manner in a groove (54) extending circumferentially in the inner housing.

The present invention discloses an electrode rod for a PECVD reaction chamber, comprising a wiring rod, a connecting rod, an inner insulating seat, an outer insulating seat, a locking cylinder, a pressing assembly, and an electrode flange. The inner insulating seat and the outer insulating seat are sleeved on the connecting rod, and the outer locking cylinder is sleeved on the wiring rod and the outer insulating seat. The locking cylinder abuts against the outer side of a collar, and the other end of the locking cylinder is pressed against the outer insulating seat by the pressing assembly. One end of the connecting rod is provided with a first limiting groove connected to a threaded hole, and a limiting plate is provided in the first limiting groove. One end of the wiring rod is provided with a second limiting groove. When one end of the wiring rod is threadedly connected to the threaded hole of the connecting rod, the limiting plate is clamped in the first and second limiting grooves to limit axial movement between the wiring rod and the connecting rod. The locking cylinder has a square hole in the middle, and the wiring rod is provided with a square shaft shoulder on one side of the collar. The shaft shoulder is inserted into the square hole of the locking cylinder. The present invention has the advantages of simple structure, easy modification, and reliable connection.