A high-precision impeller polishing equipment

Abstract

The present invention provides a high-precision impeller polishing device, which consists of an auxiliary part, a spiral mechanism part, a conversion mechanism part and a working area part. When working, the bevel gear is driven to rotate by the motor, and the bevel gear drives the spiral mechanism to rotate, thereby driving the nozzle to move up and down. On the other hand, the hydraulic cylinder pushes the rack to move left and right, and the rack is meshed with the gear to drive the conversion mechanism to rotate, thereby changing the position of the nozzle relative to the impeller, realizing multi-angle processing of the impeller, especially the blind area on the back of the blade. The device is easy to install, simple to operate, safe and reliable to work, suitable for abrasive flow precision processing of impellers, and can process two impellers at the same time, thereby improving production efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of abrasive flow machining, in particular to a high-precision impeller polishing device. Background Art

[0002] The impeller is a key component of a centrifugal pump. The impeller of a centrifugal pump transfers the energy of the prime mover to the liquid in the pump through the action of centrifugal force, which increases the speed and pressure of the liquid, causing the liquid in the pump to be discharged and the liquid in the inlet pipe to be sucked in. The materials used for the impeller are mainly gray iron 250, stainless steel and ductile iron 450, and 304 or 316 are also commonly used in life. The impeller has a complex structure. It is composed of several curved blades, and its blades are non-developable twisted straight-grained surfaces. Therefore, there are certain difficulties in traditional mechanical precision machining. Therefore, the use of abrasive flow precision machining technology can achieve better polishing.

[0003] Abrasive Flow Machining (AFM), also known as extrusion honing, is a new process technology that uses a fluid viscoelastic polymer loaded with abrasive to perform surface polishing, chamfering and deburring on workpieces under pressure. This processing technology is particularly suitable for deburring and polishing in inaccessible areas such as complex surfaces and internal cross holes in the workpiece cavity. Summary of the invention

[0004] The purpose of the present invention is to solve the problem of difficulty in precision machining of impellers, and to provide a high-precision impeller polishing device. The slide rail of the nut in the spiral mechanism slides in the slide groove of the spiral shell and the coaxiality of the spiral and the nut are used to avoid deviation during the movement, ensure that the nozzle axis and the centering bracket axis are in the same vertical plane, and use the gear rack meshing in the conversion mechanism to rotate the nozzle to change the relative position of the nozzle and the impeller, so as to achieve multi-angle processing, especially the back of the blade. The threaded cooperation of the support, pin, connecting frame and centering bracket is used to achieve accurate positioning of the nozzle, and the impeller is clamped by four clips and the nut and bracket, and the bracket and the stepped shaft thread cooperation to avoid the impeller from swinging during the processing. During the processing, the abrasive flow enters from the nozzle inlet, flows into the nozzle through the diverter plate, and flows out through the nozzle outlet of the linear array, so that the abrasive flow is evenly sprayed on the impeller, and in the process of abrasive flow processing, the hydraulic motor is used to drive the impeller to rotate, so that the polishing is more uniform, the polishing of the impeller surface and the back is achieved, and the residual stress is reduced.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a high-precision impeller polishing equipment, characterized in that the equipment consists of an auxiliary part, a spiral mechanism part, a conversion mechanism part and a working area part, the auxiliary part consists of a workbench, a support frame, a slide rail, a cover, a connecting rod and screws matched therewith, a discharge port, a double-rod hydraulic cylinder and matching bolts and pins, the spiral mechanism part consists of a motor, a bevel gear, a fixing plate, a spiral shell, a spiral and a nut matched therewith, a spiral protective cover and matching screws, the conversion mechanism part consists of a supporting body, a rolling body, a rolling body bracket and screws matched therewith, a conversion mechanism cover, a rack, a single-rod hydraulic cylinder, a fixed support and matching bolts and matching screws, the working area part consists of a nozzle part and an impeller part, the nozzle part consists of a support, a connecting frame and a pin matched therewith, a centering bracket and a nozzle, the impeller part consists of an impeller, a clamp body and a key matched therewith, and a hydraulic motor, and the clamp body consists of a clamp and a nut matched therewith, a fixing frame and a screw matched therewith.

[0006] Further, as a preference, the auxiliary part is composed of a workbench, a supporting frame, a slide rail, a cover, a discharge port, a connecting rod and screws matching therewith, a double-rod hydraulic cylinder and matching bolts; the workbench, supporting bracket, connecting rod and double-rod hydraulic cylinder are provided with through holes and are connected to the workbench through bolts; the slide rail and cover are provided with threaded holes and are respectively connected to the workbench and the connecting rod through screws; the discharge port is provided with external threads and is threadedly connected to the workbench.

[0007] Further, as a preference, the spiral mechanism part is composed of a motor, a bevel gear, a fixing plate, a spiral shell, a spiral and a nut matched therewith, a spiral protective cover and matching screws. The motor and the fixing plate are provided with through holes and connected to the support frame by bolts. The spiral shell is provided with a threaded hole and connected to the fixing plate by threaded matching. The spiral shell is provided with four slide grooves inside. The bevel gear is connected to the spiral by a key. The nut is provided with an internal thread inside and is connected to the spiral spiral. Four slide rails are provided outside to match the four slide grooves inside the spiral shell to ensure that the axis does not deviate when the nut moves up and down. The lower part is provided with a threaded hole and connected to the spiral protective cover by screws. The spiral protective cover is provided with a through hole on the upper part, a circular slide groove on the lower part, and four screw holes in a circular array on the side.

[0008] Further, as a preference, the conversion mechanism part is composed of a support body, a rolling body, a rolling body bracket and screws matching therewith, a conversion mechanism cover, a rack, a single-rod hydraulic cylinder, a fixed support and matching bolts and matching screws. The upper and lower surfaces of the support body are provided with circular grooves and six threaded holes in a circular array. The bottom is a gear shaft, and the bottom of the gear shaft is provided with four threaded holes in a circular array. The gear shaft is meshed with the rack, and the bottom of the rack is provided with a trapezoidal groove, the side is provided with four threaded holes, and is connected to the single-rod hydraulic cylinder with screws. The bottom of the hydraulic cylinder is provided with four through holes and is connected to the fixed support with bolts. The fixed support is provided with through holes and is connected to the workbench and the single-rod hydraulic cylinder with bolts. The rolling body bracket is provided with ten rolling body holes, six through holes in a circular array, and is connected to the support body with screws. The conversion mechanism cover is provided with a circular groove at the bottom inside, and four through holes in a circular array on the outside, and is connected to the spiral body protective cover with screws.

[0009] Further, as a preference, the working area is composed of a nozzle part and an impeller part. The nozzle part is composed of a support, a connecting frame and a pin matched therewith, a centering bracket and a nozzle. The support is provided with four through holes at the bottom, two separated thin plates are provided in the middle, and a circular through hole is provided on the upper part of the thin plate. The connecting frame is two separated cylinders of the same diameter, and a thin plate is provided in the middle of the cylinder. One of the cylinders is provided with a through hole and connected to the pin, and the other cylinder is provided with a threaded hole. The centering bracket is provided with a semicircular thin wall and a screw at the bottom. Two abrasive inlets are provided above the nozzle, a diverter plate is provided inside, and a linear array nozzle is provided on the side. The impeller part is composed of an impeller, a clamp body and a key matched therewith, and a hydraulic motor. The clamp body is composed of a clamp and a nut matched therewith, a fixing bracket and a screw matched therewith. The hydraulic motor is provided with a stepped shaft, which is provided with four threaded holes and two keyways. The fixing frame is provided with four large-diameter through holes and four small-diameter through holes, which are respectively connected to the clamp and the stepped shaft of the hydraulic motor through threaded cooperation. The stepped shaft is provided with two keyways and four threaded holes in a circular array. The bottom of the hydraulic motor is provided with a through hole and is connected to the workbench with bolts. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 The overall assembly diagram of the high-precision impeller polishing equipment

[0011] Figure 2 Schematic diagram of the internal assembly of the workbench

[0012] Figure 3 Schematic diagram of the partial explosion of the spiral mechanism

[0013] Figure 4 Schematic diagram of the explosion of the conversion mechanism

[0014] Figure 5Schematic diagram of the nozzle explosion

[0015] Figure 6 Schematic diagram of the impeller explosion

[0016] Figure 7 Schematic diagram of the fixed plate

[0017] Figure 8 Schematic diagram of a spiral

[0018] Fig. 9 Schematic diagram of the cross-section of the spiral shell

[0019] Fig.10 Schematic diagram of the nut

[0020] Fig.11 Schematic diagram of the spiral protective cover

[0021] Fig.12 Schematic diagram of rolling element support

[0022] Fig.13 Schematic diagram of the conversion mechanism housing

[0023] Fig.14 Schematic diagram of the support

[0024] Fig.15 Schematic diagram of the rack

[0025] Fig.16 Schematic diagram of fixed support

[0026] Fig.17 Schematic diagram for cover

[0027] Fig.18 Schematic diagram of the connecting rod

[0028] Fig.19 Schematic diagram of the nozzle

[0029] Fig. 20 Schematic diagram of the support

[0030] Fig.21 Schematic diagram of the connection frame

[0031] Fig. 22 Schematic diagram of the centering bracket

[0032] Fig.23 Schematic diagram of the clamp

[0033] Fig.24 Schematic diagram of the fixed frame

[0034] Fig.25 Schematic diagram of the discharge port

[0035] In the figure: 1, workbench, 2, hydraulic motor, 3, slide rail, 4, cover, 4-1, slide groove, 4-2, four threaded holes, 4-3, semicircular through hole, 4-4, four through holes matched with the fixed support, 5, support frame, 6, single-rod hydraulic cylinder, 7, fixed support, 7-1, four through holes matched with the workbench, 7-2, four through holes matched with the single-rod hydraulic cylinder, 7-3, trapezoidal slide rail, 8, fixed plate, 8-1, four through holes matched with the fixed plate and the spiral shell, 8-2, four through holes matched with the fixed plate and the support frame, 9, bevel gear, 10, electric Motor, 11, spiral housing, 11-1, through hole for spiral housing to match spiral body, 11-2, through hole for spiral housing to match fixing plate, 11-3, slide groove for spiral housing to match nut slide rail, 12, spiral protection cover, 12-1, four threaded holes, 12-2, four through holes, 12-3, circular slide groove, 13, conversion mechanism housing, 13-1, four through holes in a circular array, 13-2, circular slide groove, 13-3, through hole, 14, rack, 14-1, four threaded holes, 14-2, trapezoidal groove, 15, gear shaft, 1 5-1, six through holes in a circular array, 15-2, circular flower groove, 15-3, gear, 15-4, four threaded holes in a circular array, 16, connecting rod, 16-1, four through holes, 16-2, slide, 17, double-rod hydraulic cylinder, 18, spiral body, 18-1, keyway for spiral body and bevel gear, 19, nut, 19-1, nut slide rail, 19-2, threaded hole for nut and spiral body, 19-3, four threaded holes for nut, 20, discharge port, 21, fixing frame, 21-1, four through holes for clamp, 21-2, and stepped shaft Four matching through holes, 22. Clip, 23. Nozzle, 23-1. Nozzle inlet, 23-2. Linear array nozzle outlet, 23-3. Blind hole, 23-4. Four threaded holes in a circular array, 24. Impeller, 25. Support, 25-1. Four through holes matching with the workbench, 25-2. Through hole matching with the connecting frame, 26. Centering bracket, 27. Rolling body, 28. Rolling body bracket, 28-1. Rolling body hole, 28-2. Six through holes in a circular array, 28-3. Through hole, 29. Connecting frame, 29-1. Through hole, 29-2. Threaded hole. DETAILED DESCRIPTION

[0036] The present invention provides a high-precision impeller polishing device. The technical scheme in the embodiments of the present invention is clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, other embodiments obtained by ordinary technicians in this field without creative work are all within the protection scope of the present invention.

[0037] The present invention mainly consists of four parts, namely, an auxiliary part, a spiral mechanism part, a conversion mechanism part, and a working area part. Since the present invention is a composite structure, the installation sequence from bottom to top is adopted. The auxiliary part of the equipment is composed of a workbench (1), a support frame (5), a slide rail (3), a cover (4), a discharge port (20), a connecting rod (16) and screws matched therewith, a double-rod hydraulic cylinder (17) and matching bolts and pins. First, the support bracket (5) is fixed to the workbench (1) by bolts, and then the slide rail (3) is fixed to the workbench (1) by screws. The slide groove (4-1) of the cover (4) is matched with the slide rail (3), the connecting rod (16) is fixed to the cover (4) by screws, and then the double-rod hydraulic cylinder (17) is fixed to the workbench (1) by bolts. The hydraulic cylinder push rod is connected to the connecting rod (16) by pins, and the discharge port (20) is connected to the bottom of the workbench (1) by threads, thereby realizing the installation of the auxiliary part of the equipment.

[0038] The working area part is composed of a nozzle part and an impeller part. The nozzle part is composed of a support (25), a connecting frame (29) and a pin matched therewith, a centering bracket (26), and a nozzle (23). First, the support (25) is connected to the workbench (1) by bolts, the connecting frame (29) is connected to the support (25) by pins, and the centering bracket (26) is connected to the connecting frame (29) by threads, and then the nozzle (23) and the centering bracket (26) are coaxially tangent. The impeller part is composed of an impeller (24), a clamp body and a key matched therewith, and a hydraulic motor (2). The clamp body is composed of a clamp (22) and a nut matched therewith, a fixing frame (21) and a screw matched therewith. First, the hydraulic motor (2) is connected to the workbench (1) by bolts, and then the fixing frame (21) is fixed to the stepped shaft of the hydraulic motor (2) by a key and matching screws. Then, the impeller (24) is fixed to the stepped shaft by a key and the impeller (24) is clamped to the fixing frame (21) by the clamp (22) and its matching nut, thereby realizing the installation work of the working area part of the equipment.

[0039] The conversion mechanism part is composed of a support body (15), a rolling body (27), a rolling body bracket (28) and screws matched therewith, a conversion mechanism outer cover (13), a rack (14), a single-rod hydraulic cylinder (6), a fixed support (7) and matching bolts and matching screws. First, the rolling body (27) is placed in the rolling body hole (28-1) on the rolling body bracket (28), and then the rolling body bracket (28) and the support body (15) are connected by screws. The slide groove (13-2) inside the conversion mechanism outer cover (13) is tangent to the rolling body (27), and then the fixed support (7) is connected by bolts. The single-rod hydraulic cylinder (6) is fixed to the fixed support (7) by bolts, the rack (14) is connected to the push rod of the single-rod hydraulic cylinder (6) by screws, and the trapezoidal groove (14-2) at the bottom of the rack (14) is overlapped with the trapezoidal slide rail (7-2) on the fixed support (7), and the rack (14) is meshed with the gear (15-3) on the support body (15), and then the stepped shaft at the bottom of the support body (15) is embedded in the blind hole (23-3) on the nozzle (23), and the two are fixed by screws, thereby realizing the installation work of the conversion mechanism part of the equipment.

[0040] The spiral mechanism part is composed of a motor (10), a bevel gear (9), a fixing plate (8), a spiral housing (11), a spiral (18) and a nut (19) matched therewith, a spiral protection cover (12) and matching screws. First, the motor (10) is connected to the support frame (5) by bolts, the bevel gear 1 (9) is connected to the shaft of the motor (10) by a key and the shaft and the hole are interference fit, the bevel gear 2 (9) is connected to the shaft of the spiral (18) by a key and the shaft and the hole are interference fit, and then the fixing plate (8) and the support frame (5) are screwed together. The fixing plate (8) is connected by bolts, and the fixing plate (8) is fixed to the spiral housing (11) by bolts, and then the nut (19) is matched with the spiral, and the slide rail (19-1) on the nut is tangent to the slide groove (11-3) in the spiral housing, and then the spiral protection cover (12) is connected to the nut (19) by screws, and at the same time, the circular slide groove (12-3) at the bottom of the spiral protection cover is tangent to the rolling body (27), and the conversion mechanism outer cover (13) is connected to the spiral protection cover (12) by screws, thereby realizing the installation work of the conversion mechanism part of the equipment.

[0041] The auxiliary part of this equipment can prevent liquid splashing during operation and discharge waste. The spiral mechanism part can realize the up and down movement of the nozzle, which is convenient for the installation and removal of the impeller. The conversion mechanism part can change the relative position of the nozzle and the impeller, and can realize multi-angle processing of the impeller, especially the blind area on the back of the blade. The working area part can make the impeller rotate during the processing, making the processing more uniform.

[0042] When the device is in operation, it is first confirmed that the impeller (24) has been clamped and can rotate, then the motor (10) is energized, the cover is closed through the double-rod hydraulic cylinder, and adjustments are made through the spiral mechanism part and the conversion mechanism part. After the nozzle (23) is placed on the centering bracket (26), the hydraulic motor is energized, the impeller (24) starts to rotate, the abrasive flow fluid is connected to the nozzle inlet (23-1), and finally the abrasive flow precision machining of the impeller is started.

[0043] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-precision impeller polishing device, characterized in that: The equipment is composed of an auxiliary part, a spiral mechanism part, a conversion mechanism part and a working area part. The auxiliary part is composed of a workbench, a supporting frame, a slide rail, a cover, a connecting rod and screws matched therewith, a discharge port, a double-rod hydraulic cylinder and matching bolts and pins. The spiral mechanism part is composed of an electric motor, a bevel gear, a fixing plate, a spiral body shell, a spiral body and nuts matched therewith, a spiral body protection cover and matching screws. The conversion mechanism part is composed of a supporting body, a rolling body, a rolling body bracket and screws matched therewith, a conversion mechanism cover, a rack, a single-rod hydraulic cylinder, a fixed support and matching bolts and matching screws. The working area part is composed of a nozzle part and an impeller part. The nozzle part is composed of a support, a connecting frame and a pin matched therewith, a centering bracket, and a nozzle; the impeller part is composed of an impeller, a clamp body and a key matched therewith, and a hydraulic motor; the clamp body is composed of a clamp and a nut matched therewith, a fixing frame and a screw matched therewith; the spiral mechanism part is composed of an electric motor, a bevel gear, a fixing plate, a spiral body shell, a spiral body and a nut matched therewith, a spiral body protective cover and matching screws; the electric motor and the fixing plate are provided with through holes and are connected to the support frame through bolts; the spiral body shell is provided with threaded holes and is connected to the fixing plate through threads; four sliding grooves are provided inside the spiral body shell; the bevel gear and the spiral body are connected through The nut is connected by a key, the inside of which is provided with an internal thread and is spirally connected to the spiral body, and the outside is provided with four slide rails that cooperate with the four slide grooves inside the spiral body shell, the purpose is to ensure that the axis does not deviate when the nut moves up and down, and the lower part is provided with a threaded hole and connected to the spiral body protection cover through screw cooperation, the spiral body protection cover is provided with a through hole on the upper part, a circular slide groove on the lower part, and four threaded holes in a circular array on the side, the conversion mechanism part is composed of a support body, a rolling body, a rolling body bracket and screws cooperating therewith, a conversion mechanism cover, a rack, a single-rod hydraulic cylinder, a fixed support and matching bolts, matching screws, and the upper and lower surfaces of the support body are provided with circular slide grooves, a circular array There are six threaded holes in a row, and a gear shaft is below. Four threaded holes in a circular array are provided at the bottom of the gear shaft. The gear shaft is meshed with a rack. A trapezoidal groove is provided at the bottom of the rack, and four threaded holes are provided on the side and are connected to the single-rod hydraulic cylinder with screws. Four through holes are provided at the bottom of the hydraulic cylinder and are connected to the fixed support with bolts. The fixed support is provided with through holes and is connected to the workbench and the single-rod hydraulic cylinder with bolts. The rolling body bracket is provided with ten rolling body holes, six through holes in a circular array, and is connected to the support body with screws. A circular slide groove is provided at the bottom of the conversion mechanism cover, and four through holes in a circular array are provided on the outside and are connected to the spiral body protection cover with screws.

2. A high-precision impeller polishing device according to claim 1, characterized in that: The auxiliary part is composed of a workbench, a supporting frame, a slide rail, a cover, a connecting rod and screws matching therewith, a discharge port, a double-rod hydraulic cylinder and matching bolts and pins. The workbench, supporting bracket, connecting rod and double-rod hydraulic cylinder are provided with through holes and are connected to the workbench through bolts. Holes are provided at the bottom. The slide rail and cover are provided with threaded holes and are connected to the workbench and connecting rod respectively through screws. The discharge port is provided with external threads and is threadedly connected to the workbench.

3. A high-precision impeller polishing device according to claim 1, characterized in that: The working area is composed of a nozzle part and an impeller part. The nozzle part is composed of a support, a connecting frame and a pin matched therewith, a centering bracket and a nozzle. The support is provided with four through holes at the bottom, two thin plates separated from each other are provided in the middle, and a circular through hole is provided on the upper part of the thin plate. The connecting frame is two separated cylinders of the same diameter, and a thin plate is provided in the middle of the cylinder. One of the cylinders is provided with a through hole and connected to the pin, and the other cylinder is provided with a threaded hole. The centering bracket is provided with a semicircular thin wall and a screw at the bottom. Two abrasive inlets are provided above the nozzle, a diverter plate is provided inside, and a There are linear array nozzles, the impeller part is composed of an impeller, a clamp body and a key matched therewith, and a hydraulic motor, the clamp body is composed of a clamp and a nut matched therewith, a fixing frame and a screw matched therewith, the hydraulic motor is provided with a stepped shaft, the stepped shaft is provided with four threaded holes and two keyways, the fixing frame is provided with four large-diameter through holes and four small-diameter through holes and are respectively connected to the clamp and the stepped shaft of the hydraulic motor by threaded cooperation, the stepped shaft is provided with two keyways and four threaded holes in a circular array, the bottom of the hydraulic motor is provided with a through hole and is connected to the workbench with bolts.

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