A machining fixture for a fixed rotor housing

Abstract

This invention provides a machining fixture for a fixed rotor housing, relating to the field of machine tool machining technology. It includes a base, a support portion, and a clamping portion. The support portion supports the bottom of the rotor housing. Multiple clamping portions are arranged at equal intervals around a preset axis, the axis of the rotor housing coinciding with the preset axis. The clamping portion includes a bracket and two clamping plates made of elastic material. The bracket has a moving portion and a middle portion connected to the clamping plates. The two clamping plates are placed on the inner and outer sides of the rotor housing sidewall. The moving portion causes the two clamping plates to approach each other radially and abut against the rotor housing sidewall. Simultaneously, the middle portion causes the clamping plates to deform and conform to the rotor housing sidewall, thus fully clamping the rotor housing sidewall radially. The clamping plates provide a large support area for the rotor housing, and the multiple clamping portions ensure a reasonable distribution of support points, reducing local pressure on the rotor housing and minimizing elastic deformation or plastic distortion, thereby ensuring machining accuracy.

Description

Technical Field

[0001] This invention relates to the field of machine tool processing technology, and in particular to a machining fixture for a fixed rotor housing. Background Technology

[0002] The rotor housing is a crucial component of wind power generation equipment, primarily used to house and protect key components such as bearings, hubs, and rotors. Its performance directly affects the generator's operational stability and service life under complex operating conditions. The rotor housing requires high corrosion resistance, wear resistance, and structural strength, and typically consists of three parts: interface modules (such as cable interfaces, tower connection interfaces, and cooling system interfaces), the outer shell structure, and the internal support structure. During machining, the rotor housing cylinder is usually placed with its opening facing upwards and clamped on a rotary table for milling, creating T-slots, various threaded holes, pin holes, internal flange holes, and speed measuring holes.

[0003] As a large, thin-walled component, the rotor housing is prone to deformation during machining due to clamping stress and cutting forces. Existing machining fixtures generally suffer from limited support area and unreasonable distribution of support points, leading to excessive local pressure on the workpiece, which in turn causes elastic deformation or plastic distortion, affecting machining accuracy.

[0004] The information disclosed in the background section of this invention is intended only to enhance the understanding of the general background of this invention, and should not be construed as an admission or in any way implying that such information constitutes prior art known to those skilled in the art. Summary of the Invention

[0005] Therefore, it is necessary to provide a machining fixture for a fixed rotor housing, addressing the problems existing in current rotor housing machining fixtures.

[0006] The above objectives are achieved through the following technical solutions:

[0007] A machining fixture for fixing a rotor chamber includes a base, a support portion disposed on the base, and multiple clamping portions. The support portion supports the bottom of the rotor chamber. The multiple clamping portions are equally spaced around a preset axis, which is vertical and passes through the center of the base. The axis of the rotor chamber coincides with the preset axis. Each clamping portion includes a bracket and two clamping plates. The clamping plates are made of an elastic material. The bracket has a moving portion and a middle portion connected to the clamping plates. The two clamping plates are respectively placed on the inner and outer sides of the side wall of the rotor chamber. The moving portion allows the two clamping plates to approach each other radially and abut against the side wall of the rotor chamber. The middle portion allows the clamping plates to deform and conform to the side wall of the rotor chamber, thereby clamping the side wall of the rotor chamber radially.

[0008] Furthermore, the moving part includes a drive assembly and two base plates disposed on the support. The base plates are parallel to the clamping plates, and the two base plates are respectively located on both sides of the two clamping plates. The drive assembly is used to drive the two base plates to move synchronously closer or further away from each other in the radial direction of the rotor chamber. The middle part includes an air bladder and a plurality of solid fillers located inside the air bladder. Adjacent fillers have friction when in contact. The air bladder is disposed between the base plate and the clamping plate. The air bladder can switch between an inflated state and a contracted state. When the air bladder switches from the inflated state to the contracted state, the distance between adjacent fillers gradually decreases until they are in close contact.

[0009] Furthermore, the airbag located outside the rotor chamber is a first component, and the airbag located inside the rotor chamber is a second component. When the airbag is in the contracted state, the pressure inside the first component is greater than the pressure inside the second component, making the first component more prone to deformation than the second component. The drive assembly includes two drive members, which can synchronously move closer to or further away from each other in the radial direction of the rotor chamber. A first elastic member is provided between the drive member and the base plate. The first elastic member is used to make the base plate have a tendency to move away from the drive member. The base plate is located between the drive member and the clamping plate. The moving part also includes a reversing assembly. When one of the base plates moves in the radial direction of the rotor chamber, the reversing assembly causes the other base plate to move in the opposite direction in the radial direction of the rotor chamber.

[0010] Furthermore, a second elastic member is provided between the substrate and the clamping plate, the second elastic member being used to give the clamping plate a tendency to move away from the substrate, and a locking component is provided on the substrate, the locking component being used to limit the distance between the clamping plate and the substrate.

[0011] Furthermore, the reversing assembly includes a gear and two racks meshing with the gear. The gear is rotatably connected to the bracket. The two racks are parallel to each other and located on both sides of the gear. The two racks are respectively fixed perpendicularly to the two substrates.

[0012] Furthermore, all of the aforementioned fillers have the same shape and size.

[0013] Furthermore, the filler is spherical.

[0014] Furthermore, the base is provided with an adjustment part, which is used to move the clamping part along the preset axis, and the adjustment part is also used to move the clamping part radially along the preset axis.

[0015] Furthermore, the adjustment unit includes a first telescopic member and a plurality of second telescopic members, all of which have telescopic directions parallel to the preset axis. The first telescopic member coincides with the preset axis, and the plurality of second telescopic members are arranged at equal intervals around the preset axis in the circumferential direction. The output end of the first telescopic member is provided with a support platform, and the output end of the second telescopic member is provided with a slide cylinder. A slide rod is provided on the bracket along the radial direction of the preset axis. The slide rod is slidably inserted into the slide cylinder. An intermediate rod is provided between the slide rod and the support platform. One end of the intermediate rod is hinged to the support platform, and the other end is hinged to the slide rod, with the hinge axis being horizontally arranged.

[0016] Furthermore, the support portion includes a plurality of support seats arranged circumferentially at equal intervals around the preset axis, and the support seats are movable radially relative to the base along the preset axis.

[0017] The present invention has at least the following beneficial effects:

[0018] (1) Place the two clamping plates on the inner and outer sides of the rotor housing sidewall respectively. The moving part makes the two clamping plates approach each other in the radial direction of the rotor housing and abut against the rotor housing sidewall. At the same time, the middle part makes the clamping plates deform to fit against the rotor housing sidewall, so as to fully clamp the rotor housing sidewall in the radial direction. The clamping plates support the rotor housing with a large area, and the multiple clamping parts make the support points reasonably distributed, reducing the local pressure on the rotor housing, reducing the elastic deformation or plastic distortion of the rotor housing, thereby ensuring the processing accuracy.

[0019] (2) When an accident occurs due to processing shaking, airbag rupture or filling material damage, the outer airbag deforms and its squeezing force on the outer wall of the rotor room decreases. The reduced pressure is transmitted to the inner airbag on the inner wall of the rotor room through the reversing assembly. Thus, the clamping effect formed by the inner and outer sides is transformed into a supporting effect from the inside to the outside, which can still ensure the stable support of the rotor room.

[0020] (3) The support and clamping parts can support and clamp rotor chambers of different sizes. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the machining fixture for a fixed rotor chamber provided in an embodiment of the present invention;

[0022] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0023] Figure 3 for Figure 1 The front view;

[0024] Figure 4 This is a schematic diagram of the clamping part.

[0025] Figure 5 for Figure 4 A magnified view of a section at point B in the middle;

[0026] Figure 6 for Figure 4 The front view;

[0027] Figure 7 for Figure 4 Top view;

[0028] Figure 8 for Figure 7 CC-direction sectional view;

[0029] Figure 9 for Figure 8 A magnified view of a section at point D;

[0030] Figure 10 for Figure 8 A magnified view of a section at point E in the middle.

[0031] in:

[0032] 101. Base; 102. Rotor chamber;

[0033] 201. Bracket; 202. Clamping plate; 203. Base plate; 204. Airbag; 205. Screw; 206. Guide rod; 207. Intermediate plate; 208. Protrusion; 209. Air tube; 210. Drive component; 211. First elastic element; 212. Pressure valve; 213. Second elastic element; 214. Locking rod; 215. Rod body; 216. Locking groove; 217. Side rod; 218. Gear; 219. Rack;

[0034] 301. First telescopic component; 302. Second telescopic component; 303. Support platform; 304. Slide cylinder; 305. Slide rod; 306. Intermediate rod; 307. Support base. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0036] The serial numbers used in this document, such as "first" and "second," are merely for distinguishing the described objects and do not have any sequential or technical meaning. The terms "connection" and "linkage" used in this invention, unless otherwise specified, include both direct and indirect connections (linkages). In the description of this invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention.

[0037] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0038] like Figures 1 to 10 As shown, this embodiment of the invention provides a machining fixture for fixing a rotor chamber, including a base 101, a support portion disposed on the base 101, and a plurality of clamping portions. The support portion is used to support the bottom of the rotor chamber 102. The plurality of clamping portions are arranged at equal intervals around a preset axis in the circumferential direction. The preset axis is vertical and passes through the center of the base 101. The axis of the rotor chamber 102 coincides with the preset axis. The clamping portion includes a bracket 201 and two clamping plates 202. The clamping plates 202 are made of elastic material. The bracket 201 is provided with a moving portion and a middle portion connected to the clamping plates 202. The two clamping plates 202 are respectively placed on the inner and outer sides of the side wall of the rotor chamber 102. The moving portion enables the two clamping plates 202 to approach each other and abut against the side wall of the rotor chamber 102 in the radial direction. The middle portion enables the clamping plates 202 to deform and conform to the side wall of the rotor chamber 102, so as to clamp the side wall of the rotor chamber 102 in the radial direction.

[0039] Two clamping plates 202 are placed on the inner and outer sides of the side wall of the rotor housing 102, respectively. The moving part causes the two clamping plates 202 to approach each other and abut against the side wall of the rotor housing 102 in the radial direction. At the same time, the middle part causes the clamping plates 202 to deform and conform to the side wall of the rotor housing 102, so as to fully clamp the side wall of the rotor housing 102 in the radial direction. The clamping plates 202 have a large support area for the rotor housing 102, and the multiple clamping parts make the support points reasonably distributed, reducing the local pressure on the rotor housing 102, reducing the elastic deformation or plastic distortion of the rotor housing 102, thereby ensuring the processing accuracy.

[0040] In addition, the middle part allows the clamping plate 202 to deform and conform to the side wall of the rotor chamber 102, so as to clamp the side wall of the rotor chamber 102 of different sizes.

[0041] The rotor housing 102 is a cylindrical workpiece with an open top when placed vertically and an open end cap at the bottom. The opening size of the end cap is smaller than the opening size at the top of the rotor housing 102. A support section supports the end cap at the bottom of the rotor housing 102, and a clamping section clamps the side walls of the rotor housing 102 to achieve stable support and fixation. The clamping plate 202 is made of an elastic material, capable of elastic deformation to a certain extent.

[0042] In one embodiment, the moving part includes a drive assembly disposed on the support 201 and two base plates 203. The base plates 203 are parallel to the clamping plates 202, and the two base plates 203 are respectively located on both sides of the two clamping plates 202. The drive assembly is used to drive the two base plates 203 to move closer or further away from each other in the radial direction of the rotor chamber 102. The middle part includes an air bladder 204 and a plurality of solid fillers (not shown) located in the air bladder 204. Adjacent fillers have friction when they come into contact. The air bladder 204 is disposed between the base plates 203 and the clamping plates 202. The air bladder 204 can switch between an inflated state and a contracted state. When the air bladder 204 switches from an inflated state to a contracted state, the distance between adjacent fillers gradually decreases to close contact.

[0043] When the airbag 204 switches from an inflated state to a contracted state, the distance between adjacent fillers gradually decreases to close contact. At the same time, the drive assembly drives the two substrates 203 to approach each other radially in the rotor chamber 102, and pushes the clamping plate 202 close to the side wall of the rotor chamber 102 through the airbag 204 and the filler therein. The adjacent fillers continue to move relative to each other, so that the clamping plate 202 deforms to fit against the side wall of the rotor chamber 102, so as to fully clamp the side wall of the rotor chamber 102 radially.

[0044] The drive assembly also includes a screw 205 and two drive members 210. The screw 205 is threadedly connected to the drive members 210, and the threads connecting the screw 205 and the two drive members 210 have opposite directions. The drive members 210 are connected to the substrate 203 through a first elastic member 211 to drive the two substrates 203 to move synchronously closer or further apart in the radial direction of the rotor chamber 102. The bracket 201 is also provided with two guide rods 206. The drive members 210 have guide holes that slide with the guide rods 206 to guide the substrates 203 to move radially along the rotor chamber 102. The screw 205 can be driven by a motor or manually by turning a handle, which is not limited here.

[0045] Furthermore, the airbag 204 is made of a soft material capable of elastic deformation, such as rubber. An intermediate plate 207 is provided between the base plate 203 and the airbag 204, and the base plate 203 and intermediate plate 207 are fixed together. One side of the airbag 204 is fixed to the surface of the intermediate plate 207, and the other side is fixed to the surface of the clamping plate 202. Multiple protrusions 208 are provided on the side of the intermediate plate 207 and the clamping plate 202 near the airbag 204. The protrusions 208 are made of the same material as the filler, and there is friction between the protrusions 208 and the filler when they come into contact. The airbag 204 is filled with a solid filler made of a rigid material. The support 201 is provided with air tubes 209 that communicate with the interiors of the two airbags 204 respectively. The ends of the air tubes 209 are connected to an external vacuum pump and are equipped with corresponding power supplies and controllers to control start and stop. When the vacuum pump evacuates the air bladder 204 through the air pipe 209, the pressure inside the air bladder 204 decreases and gradually contracts. When the vacuum pump releases, the pressure inside the air bladder 204 rises and gradually expands back to its original position.

[0046] In one embodiment, the airbag 204 located outside the rotor chamber 102 is a first component, and the airbag 204 located inside the rotor chamber 102 is a second component. When the airbag 204 is in a contracted state, the pressure inside the first component is greater than the pressure inside the second component, making the first component more prone to deformation than the second component. The drive assembly includes two drive members 210, which can synchronously move closer to or further away from each other in the radial direction of the rotor chamber 102. A first elastic member 211 is provided between the drive member 210 and the substrate 203. The first elastic member 211 is used to give the substrate 203 a tendency to move away from the drive member 210. The substrate 203 is located between the drive member 210 and the clamping plate 202. The moving part also includes a reversing assembly. When one substrate 203 moves radially along the rotor chamber 102, the reversing assembly causes the other substrate 203 to move in the opposite direction radially along the rotor chamber 102.

[0047] The T-slots, various threaded holes, pin holes, internal flange holes, and speed measuring holes that need to be machined on the rotor housing 102 are mainly concentrated on the outer wall, end face, and specific flange areas of the rotor housing 102 to meet the installation requirements of different functional components. When machining these holes, the machining equipment is mostly located outside the rotor housing 102, and machining is performed from the outside inwards. Therefore, support from the inside out is essential to ensure the stability of the rotor housing 102 and to guarantee machining accuracy. In this application, the inner and outer clamping plates 202 respectively generate compressive force on the inner and outer side walls of the rotor housing 102 and form a clamping effect, reducing the local pressure on the rotor housing 102 and reducing the elastic deformation or plastic distortion of the rotor housing 102, thereby ensuring machining accuracy.

[0048] During processing, the airbag 204 is in a contracted state. However, because the pressure inside the outer airbag 204 is greater than that inside the inner airbag 204, and the spacing between the fillers inside the outer airbag 204 is greater than that inside the inner airbag 204, the friction between the fillers inside the outer airbag 204 is less than that between the fillers inside the inner airbag 204. This makes the outer airbag 204 more prone to deformation relative to the inner airbag 204, thus making it more susceptible to damage and reducing its compressive force on the sidewall of the rotor housing 102. When accidents such as processing vibration, airbag 204 breakage, or filler damage occur, the outer airbag 204 deforms, reducing its compressive force on the outer wall of the rotor housing 102. The reduced pressure is transmitted to the inner airbag 204 through the commutation assembly, thus transforming the clamping effect formed by the inner and outer airbags into a supporting effect from the inside out, still ensuring stable support for the rotor housing 102.

[0049] It is understandable that the elastic forces exerted by the two first elastic elements 211 on the inner and outer clamping plates 202 are equal and the sum of the two is a constant value. For the outer or inner clamping plate 202, the elastic force exerted by the first elastic element 211 is equal to the reaction force generated by the side wall of the rotor chamber 102 on it. When the outer airbag 204 deforms and becomes softer, the outer first elastic element 211 loses some of its elastic force due to the outer airbag 204 and continues to act on the outer clamping plate 202. That is, the elastic force of the outer first elastic element 211 on the outer clamping plate 202 decreases, while the elastic force of the inner first elastic element 211 on the inner clamping plate 202 increases. As a result, the reaction force generated by the side wall of the rotor chamber 102 on the right clamping plate 202 increases, and the compressive force generated by the right clamping plate 202 on the side wall of the rotor chamber 102 increases. Thus, when the compressive force of the outer airbag 204 on the outer wall of the rotor chamber 102 decreases, the compressive force of the inner airbag 204 on the inner wall of the rotor chamber 102 increases.

[0050] In addition, due to the presence of the commutation assembly and the fact that the inner clamping plate 202 is in full contact with the side wall of the rotor chamber 102, when the outer airbag 204 deforms and becomes softer, neither the inner nor outer clamping plate 202 nor the airbag 204 can move radially along the rotor chamber 102.

[0051] For example, see Figure 6 The left side is the outer side of the rotor chamber 102, and the right side is the inner side. The two first elastic elements 211 on the left and right sides exert a total elastic force of 200N on the rotor chamber 102 through their respective airbags 204 and clamping plates 202, with 100N on each side; for a single clamping plate 202, the elastic force exerted on it by the first elastic element 211 is equal to the reaction force generated on it by the side wall of the rotor chamber 102. When the left airbag 204 deforms and becomes softer, under the action of the left first elastic member 211, the left base plate 203 needs to move to the right to ensure that the elastic force of the left first elastic member 211 is fully transmitted to the left clamping plate 202. Since the right base plate 203 cannot move, the left base plate 203 also cannot move. The left first elastic member 211 loses 20N of elastic force due to the left airbag 204 and continues to act on the left clamping plate 202. The left clamping plate 202 receives the remaining 80N of elastic force from the left first elastic member 211. That is, the elastic force of the left clamping plate 202 from the left first elastic member 211 decreases, and the elastic force of the right clamping plate 202 from the right first elastic member 211 increases to 120N. Therefore, the reaction force generated by the side wall of the rotor chamber 102 on the right clamping plate 202 increases, and the compressive force generated by the right clamping plate 202 on the side wall of the rotor chamber 102 increases.

[0052] The air tubes 209 on the two airbags 204 intersect, and at a certain point before the intersection, the air tube 209 on the outer airbag 204 is equipped with a pressure valve 212. The vacuum pump reduces the pressure inside the two airbags 204. When the pressure inside the outer airbag 204 drops to a first preset value, the pressure valve 212 closes, and the pressure inside the outer airbag 204 remains at the first preset value, while the pressure inside the inner airbag 204 continues to drop to a second preset value. The first preset value is greater than the second preset value, thereby making the pressure inside the outer airbag 204 greater than the pressure inside the inner airbag 204.

[0053] In one embodiment, a second elastic member 213 is provided between the substrate 203 and the clamping plate 202. The second elastic member 213 is used to make the clamping plate 202 tend to move away from the substrate 203. A locking component is provided on the substrate 203 to limit the distance between the clamping plate 202 and the substrate 203.

[0054] When the airbag 204 is inflated, the locking component is first unlocked to remove the restriction on the distance between the clamping plate 202 and the base plate 203. Under the action of the second elastic member 213, the clamping plate 202 moves away from the base plate 203. The two clamping plates 202 approach each other in the radial direction of the rotor chamber 102 and abut against the side wall of the rotor chamber 102 to pre-clamp the side wall of the rotor chamber 102. At the same time, the second elastic member 213 makes the clamping plate 202 and the side wall of the rotor chamber 102 flexibly clamped, further reducing the local pressure on the rotor chamber 102 and reducing the elastic deformation or plastic distortion of the rotor chamber 102.

[0055] Both the first elastic element 211 and the second elastic element 213 are compression springs. Additionally, the locking assembly includes a locking rod 214 and multiple parallel rods 215 fixed to the clamping plate 202. The second elastic element 213 is sleeved on the rods 215. An elongated receiving hole is provided on the intermediate plate 207, through which the rods 215 pass, and a locking groove 216 is provided on each rod 215. (See [reference]). Figure 5 and Figure 10 When the locking rod 214 is located within the locking groove 216, it restricts the movement of the rod 215 along its length, thereby limiting the distance between the clamping plate 202 and the base plate 203. When the locking rod 214 disengages from the locking groove 216, the clamping plate 202 moves away from the base plate 203 under the action of the second elastic member 213. Specifically, both ends of the locking rod 214 are hinged with side rods 217, the ends of which are hinged to the intermediate plate 207. The hinge axes are parallel to each other and both have a damping effect. The two side rods 217 are of equal length, so that the locking rod 214, the side rods 217, and the intermediate plate 207 form a parallelogram structure. The locking rod 214 is provided with a wrench. By turning the wrench, the parallelogram structure is deformed, so that the locking rod 214 is located within or disengaged from the locking groove 216. In other embodiments not shown, the locking lever 214 can be extended and retracted by an electromagnet and is equipped with a corresponding power supply and controller. When the locking lever 214 is extended, it is located within the locking groove 216, and when the locking lever 214 is retracted, it disengages from the locking groove 216. The above-described mating structure between the locking lever 214 and the locking groove 216 is not limited here.

[0056] In one embodiment, the commutation assembly includes a gear 218 and two racks 219 meshing with the gear 218. The gear 218 is rotatably connected to the bracket 201. The two racks 219 are parallel to each other and located on both sides of the gear 218. The two racks 219 are respectively fixed perpendicularly to the two base plates 203, such that when one base plate 203 moves radially along the rotor chamber 102, the racks 219 on the base plate 203 drive the gear 218 to rotate, causing the other base plate 203 to move in the opposite direction radially along the rotor chamber 102 along with the racks 219 on it.

[0057] In one embodiment, the multiple fillers are all the same shape and size, which makes it easy for adjacent fillers to move relative to each other.

[0058] In one embodiment, the filler is spherical, which further facilitates relative movement between adjacent fillers.

[0059] In one embodiment, the base 101 is provided with an adjustment part, which is used to move the clamping part along a preset axis, and the adjustment part is also used to move the clamping part radially along the preset axis.

[0060] The adjustment unit moves the clamping part along a preset axis and radially along the preset axis to adjust the position of the clamping part, so that the clamping part moves to the clamping position on the side wall of the rotor chamber 102, and can also clamp the side wall of the rotor chamber 102 of different sizes.

[0061] In one embodiment, the adjustment unit includes a first telescopic member 301 whose telescopic direction is parallel to a preset axis and a plurality of second telescopic members 302. The first telescopic member 301 coincides with the preset axis, and the plurality of second telescopic members 302 are arranged at equal intervals around the preset axis in the circumferential direction. The output end of the first telescopic member 301 is provided with a support platform 303, and the output end of the second telescopic member 302 is provided with a slide cylinder 304. A slide rod 305 is provided on the bracket 201 along the radial direction of the preset axis. The slide rod 305 is slidably inserted into the slide cylinder 304. An intermediate rod 306 is provided between the slide rod 305 and the support platform 303. One end of the intermediate rod 306 is hinged to the support platform 303, and the other end is hinged to the slide rod 305, and the hinge axis is horizontally arranged.

[0062] Initially, the intermediate rod 306 is nearly parallel to the preset axis, i.e., nearly vertical. The output ends of the first telescopic member 301 and the second telescopic member 302 extend upward synchronously, causing the clamping part to rise to the top of the side wall of the rotor chamber 102. The output end of the first telescopic member 301 descends, pushing the slide rod 305 to slide along the slide cylinder 304 through the intermediate rod 306. At the same time, the intermediate rod 306 gradually rotates to the horizontal, pushing the clamping part to move radially outward along the preset axis, so that the gap between the side wall of the rotor chamber 102 and the two clamping plates 202 is vertically aligned. Then, the output ends of the first telescopic member 301 and the second telescopic member 302 retract downward synchronously, causing the clamping part to descend, so that the side wall of the rotor chamber 102 enters the gap between the two clamping plates 202, thereby completing the clamping preparation work.

[0063] The first telescopic component 301 and the second telescopic component 302 can both be hydraulic or pneumatic structures. Their structures and working principles are existing technologies and will not be described in detail here.

[0064] In one embodiment, the support includes a plurality of support seats 307 circumferentially spaced around a preset axis. The support seats 307 are movable radially relative to the base 101 along the preset axis to provide stable support for the bottom of rotor chambers 102 of different sizes.

[0065] The base 101 is equipped with a lead screw that is threadedly connected to the support 307. The base 101 also has a sliding groove, and both the lead screw and the sliding groove are radially arranged along a preset axis. The rotation of the lead screw causes the support 307 to move radially along the preset axis, providing stable support for the bottom of rotor housings 102 of different sizes. The number of clamping parts is equal to the number of second telescopic members 302, and equal to the number of support 307s.

[0066] The working principle of this invention is as follows:

[0067] First, control the support base 307 to move radially along a preset axis, placing the rotor chamber 102 on the support base 307 with the opening of the rotor chamber 102 facing upwards and the axis vertically set. Then, control the output ends of the first telescopic member 301 and the second telescopic member 302 to extend upwards synchronously, driving the clamping part to rise to the top of the side wall of the rotor chamber 102. Next, control the output end of the first telescopic member 301 to descend, pushing the slide rod 305 to slide along the slide cylinder 304 through the intermediate rod 306. At the same time, the intermediate rod 306 gradually rotates to the horizontal, pushing the clamping part to move radially outwards along the preset axis, so that the side wall of the rotor chamber 102 and the gap between the two clamping plates 202 are aligned vertically. Then, the output ends of the first telescopic member 301 and the second telescopic member 302 retract downwards synchronously, driving the clamping part to descend, so that the side wall of the rotor chamber 102 enters the gap between the two clamping plates 202, thus completing the clamping preparation work.

[0068] Then, the locking lever 214 is disengaged from the locking groove 216. Under the action of the second elastic member 213, the clamping plate 202 moves away from the base plate 203. The two clamping plates 202 approach each other radially in the rotor chamber 102 and abut against the side wall of the rotor chamber 102 to pre-clamp the side wall of the rotor chamber 102. The vacuum pump is controlled to evacuate the air inside the two air bags 204. The pressure inside the two air bags 204 decreases and gradually contracts. The distance between adjacent fillers gradually decreases to close contact. The first elastic member 211 can apply force to the base plate 203. The base plate 203 pushes the air bags 204 and their fillers, so that the adjacent fillers further move relative to each other and fully adhere to the clamping plate 202.

[0069] Then, the screw 205 and the drive unit 210 drive the two base plates 203 to move closer to each other in the radial direction of the rotor chamber 102. The air bag 204 and the filling material inside push the clamping plate 202 closer to the side wall of the rotor chamber 102. The adjacent filling materials continue to move relative to each other, so that the clamping plate 202 deforms to fit the side wall of the rotor chamber 102, so as to fully clamp the side wall of the rotor chamber 102 in the radial direction. The clamping plate 202 has a large support area for the rotor chamber 102, and the multiple clamping parts make the support points reasonably distributed, reducing the local pressure on the rotor chamber 102, reducing the elastic deformation or plastic distortion of the rotor chamber 102, thereby ensuring the processing accuracy.

[0070] Pressure valve 212 causes the pressure inside the outer airbag 204 to be greater than the pressure inside the inner airbag 204, the spacing between the fillers inside the outer airbag 204 to be greater than the spacing between the fillers inside the inner airbag 204, and the friction between the fillers inside the outer airbag 204 to be less than the friction between the fillers inside the inner airbag 204. This makes the outer airbag 204 more prone to deformation relative to the inner airbag 204, thereby making the outer airbag 204 more prone to damage relative to the inner airbag 204 and reducing its compressive force on the sidewall of the rotor chamber 102. During the machining of rotor housing 102, if an accident occurs due to machining vibration, damage to airbag 204, or damage to the filling material, the outer airbag 204 deforms, reducing the compressive force on the outer wall of rotor housing 102. The reduced pressure is transmitted to the inner airbag 204 on the inner wall of rotor housing 102 through gear 218 and rack 219, thus transforming the clamping action formed by the inside and outside into a supporting action from the inside out, which can still ensure stable support for rotor housing 102.

[0071] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0072] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A machining fixture for a fixed rotor housing, characterized in that, The device includes a base, a support portion disposed on the base, and multiple clamping portions. The support portion supports the bottom of the rotor chamber. The multiple clamping portions are equally spaced around a preset axis in the circumference. The preset axis is vertical and passes through the center of the base. The axis of the rotor chamber coincides with the preset axis. Each clamping portion includes a bracket and two clamping plates. The clamping plates are made of an elastic material. The bracket is provided with a moving portion and a middle portion connected to the clamping plates. The two clamping plates are respectively placed on the inner and outer sides of the side wall of the rotor chamber. The moving portion allows the two clamping plates to approach each other radially and abut against the side wall of the rotor chamber. The middle portion allows the clamping plates to deform and conform to the side wall of the rotor chamber, thereby clamping the side wall of the rotor chamber radially. The moving part includes a drive assembly and two base plates disposed on the support. The base plates are parallel to the clamping plates, and the two base plates are respectively located on both sides of the two clamping plates. The drive assembly is used to drive the two base plates to move synchronously closer or further away from each other in the radial direction of the rotor chamber. The middle part includes an air bladder and a plurality of solid fillers located within the air bladder. Adjacent fillers have friction when in contact. The air bladder is disposed between the base plates and the clamping plates. The air bladder can switch between an inflated state and a contracted state. When the air bladder switches from the inflated state to the contracted state, the distance between adjacent fillers gradually decreases until they are in close contact. The base is provided with an adjustment part, which is used to move the clamping part along the preset axis and to move the clamping part radially along the preset axis. The adjustment part includes a first telescopic member and a plurality of second telescopic members whose telescopic directions are all parallel to the preset axis. The first telescopic member coincides with the preset axis, and the plurality of second telescopic members are arranged at equal intervals around the preset axis in the circumferential direction. The output end of the first telescopic member is provided with a support platform, and the output end of the second telescopic member is provided with a slide cylinder. The bracket is provided with a slide rod radially along the preset axis. The slide rod is slidably inserted into the slide cylinder. An intermediate rod is provided between the slide rod and the support platform. One end of the intermediate rod is hinged to the support platform, and the other end is hinged to the slide rod, and the hinge axis is horizontally arranged.

2. The machining fixture for the fixed rotor chamber according to claim 1, characterized in that, The airbag located outside the rotor chamber is the first component, and the airbag located inside the rotor chamber is the second component. When the airbag is in the contracted state, the pressure inside the first component is greater than the pressure inside the second component, making the first component more prone to deformation than the second component. The drive assembly includes two drive members that are capable of synchronously moving closer to or further away from each other in the radial direction of the rotor chamber. A first elastic member is provided between the drive member and the substrate. The first elastic member is used to give the substrate a tendency to move away from the drive member. The substrate is located between the drive member and the clamping plate. The moving part further includes a reversing assembly that causes the other substrate to move in the opposite direction in the radial direction of the rotor housing when one of the substrates moves radially along the rotor housing.

3. The machining fixture for the fixed rotor chamber according to claim 1 or 2, characterized in that, A second elastic member is provided between the substrate and the clamping plate. The second elastic member is used to make the clamping plate tend to move away from the substrate. A locking component is provided on the substrate to limit the distance between the clamping plate and the substrate.

4. The machining fixture for the fixed rotor chamber according to claim 2, characterized in that, The reversing assembly includes a gear and two racks meshing with the gear. The gear is rotatably connected to the bracket. The two racks are parallel to each other and located on both sides of the gear. The two racks are respectively fixed perpendicularly to the two base plates.

5. The machining fixture for the fixed rotor chamber according to claim 1, characterized in that, The multiple fillers are all identical in shape and size.

6. The machining fixture for the fixed rotor chamber according to claim 5, characterized in that, The filler is spherical.

7. The machining fixture for the fixed rotor chamber according to claim 1, characterized in that, The support includes a plurality of support seats arranged circumferentially at equal intervals around the preset axis, and the support seats are movable radially relative to the base along the preset axis.

Images