Gear transmission type centrifugal pump testing device and testing method

Abstract

The invention relates to a gear transmission type centrifugal pump testing device which comprises a rack, a motor, a gear box, a gear transmission type centrifugal pump, a lubricating system and a water supply system. The gear box comprises a box body and a gear transmission assembly, the motor and the gear box are installed on the rack, and the power input end of the gear transmission assembly is in transmission connection with the power output end of the motor. A first mounting hole is formed in a box body of the gear box, the gear transmission type centrifugal pump is detachably and fixedly mounted on the box body, and a transmission gear of the gear transmission type centrifugal pump enters the box body through the first mounting hole and is meshed with a gear of the gear transmission assembly; the lubricating system is used for providing lubricating oil for the gearbox; the water supply system is used for supplying water to the gear transmission type centrifugal pump. The invention further provides a test method. According to the invention, the operation state of the gear-type centrifugal pump on the diesel engine can be better simulated, the gear engagement state can be inspected, the assembly time can be shortened, and the test efficiency of the gear-type centrifugal pump can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of gear-driven centrifugal pumps, and in particular to a gear-driven centrifugal pump testing device and a testing method. Background Art

[0002] When the diesel engine is running, the transmission gear of the gear-driven centrifugal pump meshes with the idler gear of the diesel engine. Under variable operating conditions, the tooth surface of the transmission gear is prone to wear. In the prior art, a platform test is usually performed on the gear-driven centrifugal pump to verify the performance of the gear-driven centrifugal pump. However, the platform test of the gear-driven centrifugal pump in the prior art usually has the following technical problems: when the platform test is performed on the gear-driven centrifugal pump, a coupling is usually used to replace the meshing transmission between the transmission gear of the gear-driven centrifugal pump and the idler gear of the diesel engine. On the one hand, the meshing state, design quality and manufacturing quality of the transmission gear of the gear-driven centrifugal pump cannot be verified. On the other hand, after the platform test, the coupling needs to be disassembled before the transmission gear can be installed, which is relatively time-consuming. Summary of the invention

[0003] The object of the present invention is to provide a gear-driven centrifugal pump test device and test method to alleviate or eliminate at least one of the above-mentioned technical problems.

[0004] A gear-driven centrifugal pump test device described in the present invention comprises a test bench, a motor, a gear box, a gear-driven centrifugal pump, a lubrication system and a water supply system; the gear box comprises a box body and a gear transmission assembly installed in the box body, the motor and the gear box are respectively installed on the box body, and the power input end of the gear transmission assembly is transmission-connected with the power output end of the motor; a first mounting hole is provided on the box body of the gear box, and the gear-driven centrifugal pump is detachably fixedly installed on the box body, and the transmission gear of the gear-driven centrifugal pump enters the box body through the first mounting hole and meshes with the gear of the gear transmission assembly; the lubrication system is connected to the gear box, and the lubrication system is used to provide lubricating oil to the gear box; the water supply system is connected to the gear-driven centrifugal pump, and the water supply system is used to supply water to the gear-driven centrifugal pump.

[0005] Optionally, the gear transmission assembly includes a transmission shaft rotatably supported in the housing and a test gear mounted on the transmission shaft, the power input end of the transmission shaft is connected to the power output end of the motor through a coupling assembly, and the test gear is meshed with the transmission gear.

[0006] Optionally, the box body includes a box cover and a box body main body surrounded by a bottom wall and side walls, the upper side of the box body is open, and the box cover can removably close the opening; the side wall is provided with a second mounting hole and a bearing seat extending from the second mounting hole into the box body, and the transmission shaft is rotatably supported on the bearing seat by at least two bearings arranged at intervals.

[0007] Optionally, the transmission shaft includes a first shaft section, a second shaft section, a third shaft section and a fourth shaft section arranged in sequence from left to right, the outer diameter of the second shaft section is larger than the outer diameter of the first shaft section, the outer diameter of the second shaft section is larger than the outer diameter of the third shaft section, the first shaft section is connected to the coupling assembly, at least two of the bearings are arranged between the third shaft section and the bearing seat, the test gear is installed on the fourth shaft section, and the end of the fourth shaft section is detachably installed with a fastener that tightens the test gear to the left, and at least two of the bearings adjacent to the second shaft section are supported to the left on the second shaft section, and a sleeve mounted on the outer periphery of the transmission shaft is clamped between the test gear and the bearing adjacent to the test gear and between two adjacent bearings.

[0008] Optionally, the upper portion of the bearing seat is provided with a first through hole for lubricating oil to enter the inner cavity of the bearing seat, and the lower portion of the bearing seat is provided with a second through hole for lubricating oil to be discharged from the inner cavity of the bearing seat.

[0009] Optionally, a retaining ring is detachably installed in the inner cavity of the bearing seat for supporting the rightmost bearing of at least two bearings to the left.

[0010] Optionally, a third mounting hole is provided on the side wall at a position opposite to the second mounting hole, a blind cover is detachably installed in the third mounting hole, a first sealing ring is provided between the blind cover and the third mounting hole, a sealing cover surrounding the periphery of the transmission shaft is installed at the second mounting hole, and a second sealing ring is provided between the sealing cover and the second mounting hole.

[0011] Optionally, the lubrication system includes a lubricating oil tank, a gear pump, a first oil pipe, a second oil pipe and a filter; the lubricating oil output end of the lubricating oil tank, the gear pump, the first oil pipe and the lubricating oil input end of the gear box are connected in sequence; the lubricating oil output end of the gear box, the second oil pipe, the filter and the lubricating oil input end of the lubricating oil tank are connected in sequence.

[0012] Optionally, the water system includes a water tank, a first pipeline, a flow meter, a first valve, a vacuum gauge, a second pipeline, a pressure gauge, and a second valve; the water output end of the water tank, the flow meter, the first valve, the vacuum gauge, and the water input end of the gear-driven centrifugal pump are connected in sequence through the first pipeline; the water output end of the gear-driven centrifugal pump, the pressure gauge, the second valve, and the water input end of the water tank are connected in sequence through the second pipeline.

[0013] The present invention also proposes a test method, comprising the following steps: Assemble the gear-driven centrifugal pump test device described in any one of the above items; Turn on the lubrication system, turn on the motor, adjust the motor speed to the test speed, adjust the valve opening of the water supply system, adjust the water pressure of the water supply system to the test pressure, and conduct a bench test on the gear-driven centrifugal pump.

[0014] The invention optimizes the gear transmission centrifugal pump test device, can better simulate the running state of the gear centrifugal pump on the diesel engine, can check the gear meshing state, can shorten the assembly time and improve the test efficiency of the gear centrifugal pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of a gear-driven centrifugal pump test device described in some embodiments; Figure 2 It is a structural schematic diagram of the box body described in some embodiments; Figure 3 for Figure 1 AA section view in; Figure 4 is a schematic structural diagram of a transmission shaft described in some embodiments; Figure 5 is a schematic diagram of the structure of the sealing cover described in some embodiments; Figure 6 It is a schematic diagram of the structure of the cover described in some embodiments; Figure 7 It is a schematic diagram of the structure of the box cover described in some embodiments; Figure 8 It is a schematic diagram of the meshing between the transmission gear of the gear-driven centrifugal pump and the test gear of the gear box; Fig. 9 Schematic diagram of the components of the gear-driven centrifugal pump test device described in some embodiments.

[0016] Among them, 1-frame, 2-motor, 3-coupling assembly, 4-gear box, 5-gear-driven centrifugal pump, 6-lubrication system, 7-water supply system, 401-box body, 402-box inner cavity, 403-third mounting hole, 404-first mounting hole, 405-first flange, 406-mounting base, 407-oil return hole, 408-second mounting hole, 409-second flange, 410-bearing seat, 411-oil return groove, 412-second through hole, 413-box cover, 414-oil inlet hole, 415-first through hole, 416-transmission shaft, 417-first bearing, 418-second bearing, 419-retaining ring, 420-test gear, 421-bolt, 422-gasket, 423-first sleeve, 42 4-second sleeve, 425-blind cover, 426-first sealing ring, 427-sealing cover, 428-second sealing ring, 429-first flat key, 430-second flat key, 431-third flat key, 432-first shaft section, 433-second shaft section, 434-third shaft section, 435-fourth shaft section, 436-second keyway, 437-first keyway, 438-first threaded hole, 439-flange, 440-annular portion, 441-second sealing ring mounting groove, 442-notch, 443-matching hole, 444-first sealing ring mounting groove, 445-second threaded hole, 501-transmission gear, 601-lubricating oil tank, 602-gear pump, 603-first oil pipe, 604-second oil pipe, 605-filter, 701-water tank, 702-first pipeline, 703-flow meter, 704-first valve, 705-vacuum gauge, 706-second pipeline, 707-pressure gauge, 708-second valve. DETAILED DESCRIPTION

[0017] The following will describe the embodiments of the present invention with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for illustrating the present invention, not for limiting the scope of protection of the present invention.

[0018] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and thus the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0019] like Figures 1 to 9A gear-driven centrifugal pump test device shown in the figure includes a test bench 1, a motor 2, a gear box 4, a gear-driven centrifugal pump 5, a lubrication system 6 and a water supply system 7; the gear box 4 includes a box body and a gear transmission assembly installed in the box body, the gear transmission assembly is used to transmit the power output of the motor 2 to the gear-driven centrifugal pump 5 to drive the gear-driven centrifugal pump 5 to operate, the motor 2 and the gear box 4 are respectively installed on the test bench 1, and the power input end of the gear transmission assembly is connected to the power output end of the motor 2; a first mounting hole 404 is provided on the box body of the gear box 4, the gear-driven centrifugal pump 5 is detachably fixedly installed on the box body, and the transmission gear 501 of the gear-driven centrifugal pump 5 enters the box body through the first mounting hole 404 and meshes with the gear of the gear transmission assembly; the lubrication system 6 is connected to the gear box 4, and the lubrication system 6 is used to provide lubricating oil to the gear box 4 to lubricate the components in the gear box 4; the water supply system 7 is connected to the gear-driven centrifugal pump 5, and the water supply system 7 is used to supply water to the gear-driven centrifugal pump 5.

[0020] By adopting the above technical solution, the motor 2 drives the gear transmission assembly of the gear box 4 to rotate, and transmits the torque to the gears of the gear transmission assembly. The gears of the gear transmission assembly are meshed with the transmission gear 501 of the gear-driven centrifugal pump 5 to drive the gear-driven centrifugal pump 5 to operate at the test speed. The lubrication system 6 lubricates the components in the gear box 4, and the water supply system 7 supplies water to the gear-driven centrifugal pump 5.

[0021] The gear-driven centrifugal pump test device can be used to perform a performance verification test on the gear-driven centrifugal pump 5. The design quality and manufacturing quality of the gear-driven centrifugal pump 5 can be verified during the platform test phase, simulating the actual operation of the gear-driven centrifugal pump on a diesel engine. Since the lubrication of the components is taken into consideration, the gear-driven centrifugal pump test device can operate safely and reliably, and can also test the reliability of the gear-driven centrifugal pump 5.

[0022] When the above-mentioned gear-driven centrifugal pump testing device is used for testing, the assembly of the gear-driven centrifugal pump 5 is tested directly, avoiding the process of installing the transmission gear 501 after the test, improving the assembly efficiency, saving labor costs, shortening the assembly time and improving the test efficiency of the gear-driven centrifugal pump.

[0023] In some embodiments, the gear transmission assembly includes a transmission shaft 416 rotatably supported in a housing and a test gear 420 mounted on the transmission shaft 416. The test gear 420 and the transmission shaft 416 rotate synchronously. The power input end of the transmission shaft 416 is connected to the power output end of the motor 2 through the coupling assembly 3, and the test gear 420 is meshed with the transmission gear 501. The use of a transmission shaft 416 and a test gear 420 to transmit power between the motor 2 and the gear-driven centrifugal pump 5 has the characteristics of simple structure and easy implementation.

[0024] In some embodiments, the box body includes a box cover 413 and a box body main body 401 surrounded by a bottom wall and a side wall, the box body main body 401 has an opening on the upper side, and the box cover 413 is a detachable closed opening; the side wall is provided with a second mounting hole 408 and a bearing seat 410 extending from the second mounting hole 408 into the box body, the bearing seat 410 is integrally formed with the side wall, and the transmission shaft 416 is rotatably supported on the bearing seat 410 through at least two bearings arranged at intervals. With the above technical solution, the box cover 413 is provided to facilitate the assembly of the gear box 4, and a bearing seat 410 and at least two bearings arranged at intervals are provided to rotatably support the transmission shaft 416, which has the characteristics of easy implementation, easy assembly and stable support.

[0025] In some embodiments, the transmission shaft 416 includes a first shaft section 432, a second shaft section 433, a third shaft section 434 and a fourth shaft section 435 which are arranged in sequence from left to right. The outer diameter of the second shaft section 433 is larger than the outer diameter of the first shaft section 432, and the outer diameter of the second shaft section 433 is larger than the outer diameter of the third shaft section 434. The first shaft section 432 is connected to the coupling assembly 3, at least two bearings are arranged between the third shaft section 434 and the bearing seat 410, and the test gear 420 is installed on the fourth shaft section 435. The end of the fourth shaft section 435 is detachably installed with a fastener for tightening the test gear 420 to the left. The bearing adjacent to the second shaft section 433 of at least two bearings is supported to the left on the second shaft section 433. A sleeve mounted on the outer periphery of the transmission shaft 416 is respectively clamped between the test gear 420 and the bearing adjacent to the test gear 420, and between two adjacent bearings, and the sleeve can play a role of axial limiting. By adopting the above technical solution, the second shaft section 433 is reasonably arranged and the sleeve is used to form an axial support, an anti-movement design is formed, so that the gear-driven centrifugal pump test device can operate more safely and reliably, and the gear-driven centrifugal pump 5 can be tested more reliably.

[0026] In some embodiments, the upper portion of the bearing seat 410 is provided with a first through hole 415 for lubricating oil to enter the inner cavity of the bearing seat 410, and the lower portion of the bearing seat 410 is provided with a second through hole 412 for lubricating oil to be discharged from the inner cavity of the bearing seat 410. With the above technical solution, the first through hole 415 and the second through hole 412 can improve the lubrication capacity of the parts in the bearing seat 410. In a specific implementation, the lower portion of the inner cavity of the bearing seat 410 can be provided with an oil return groove 411, and the second through hole 412 is provided in the oil return groove 411. The oil return groove 411 is provided to ensure that the lubricating oil can flow out of the bearing seat 410 smoothly. During use, the lubricating oil enters the bearing seat 410 through the first through hole 415, lubricates the first bearing 417 and the second bearing 418, and the surplus lubricating oil flows to the bottom of the box through the oil return groove 411 and the second through hole 412.

[0027] In some embodiments, a retaining ring 419 for supporting the rightmost bearing of at least two bearings to the left is detachably installed in the inner cavity of the bearing seat 410, and the retaining ring 419 can limit the axial position of the bearing. In specific implementation, an annular groove is provided in the inner cavity of the bearing seat 410, and the retaining ring 419 is installed in the annular groove. The retaining ring 419 can be a C-shaped retaining ring 419.

[0028] In some embodiments, a third mounting hole 403 is provided on the side wall at a position opposite to the second mounting hole 408, a cover 425 is detachably installed in the third mounting hole 403, a first sealing ring 426 is provided between the cover 425 and the third mounting hole 403, a sealing cover 427 surrounding the periphery of the transmission shaft 416 is installed at the second mounting hole 408, and a second sealing ring 428 is provided between the sealing cover 427 and the second mounting hole 408. With the above technical solution, the provision of the cover 425 and the sealing cover 427 both help to reduce the difficulty of installing the gear transmission assembly, and the provision of the first sealing ring 426 and the second sealing ring 428 can ensure the sealing performance of the gear box 4 and reduce the risk of lubricating oil leakage.

[0029] As a specific example, the outer end surface of the blind cover 425 is provided with a second threaded hole 445, the outer peripheral surface of the blind cover 425 cooperates with the third mounting hole 403, the outer peripheral surface of the blind cover 425 is provided with a first sealing ring mounting groove 444, and the first sealing ring 426 is mounted in the first sealing ring mounting groove 444. The second threaded hole 445 can improve the convenience of disassembling and assembling the blind cover 425.

[0030] As a specific example, the sealing cover 427 includes an annular portion 440 and a flange 439 connected to the outer periphery of the outer end of the annular portion 440. The outer peripheral surface of the annular portion 440 cooperates with the second mounting hole 408. The outer peripheral surface of the annular portion 440 is provided with a second sealing ring mounting groove 441, and the second sealing ring 428 is installed in the second sealing ring mounting groove 441. A second flange portion 409 is provided on the outer periphery of the second mounting hole 408. The flange 439 is fixedly connected to the second flange portion 409 by a plurality of screws, thereby fixing the sealing cover 427 to the second mounting hole 408. In a specific implementation, the central hole of the sealing cover 427 is a matching hole 443 that cooperates with the second shaft segment 433. The inner end of the annular portion 440 is provided with a plurality of notches 442, and the lubricating oil can flow into the notches 442 to the oil return groove 411. The inner end surface of the annular portion 440 is in contact with the left end surface of the second bearing 418.

[0031] As a specific example, two bearings are arranged between the bearing seat 410 and the transmission shaft 416, and the two bearings are respectively a first bearing 417 and a second bearing 418. The first bearing 417 is supported to the right on the retaining ring 419, and the second bearing 418 is supported to the left on the second shaft segment 433. The second sleeve 424 is clamped between the first bearing 417 and the second bearing 418, and the first sleeve 423 is clamped between the first bearing 417 and the test gear 420. A first threaded hole 438 is arranged at the end of the fourth shaft segment 435, and a bolt 421 is installed in the first threaded hole 438. A gasket 422 is mounted on the bolt 421. Tightening the bolt 421 causes the gasket 422 to press the test gear 420 to the left. By adopting the above technical solution, the transmission shaft 416, the first bearing 417, the second bearing 418, the first sleeve 423 and the second sleeve 424 can be installed into the housing by means of left insertion, and then the test gear 420 and the sealing cover 427 can be installed, which has the characteristic of easy assembly.

[0032] In a specific implementation, the transmission shaft 416 and the test gear 420 can be connected via a first flat key 429, the transmission shaft 416 and the coupling assembly 3 can be connected via a second flat key 430, the power output shaft of the motor 2 and the coupling assembly 3 can be connected via a third flat key 431, and the transmission shaft 416 is provided with a first keyway 437 that cooperates with the first flat key 429 and a second keyway 436 that cooperates with the second flat key 430.

[0033] As a specific example, a first flange portion 405 is arranged on the periphery of the first mounting hole 404, and a flange structure for connecting with the first flange portion 405 is arranged on the gear-driven centrifugal pump 5. The aperture of the first mounting hole 404 is larger than the outer diameter of the transmission gear 501, so that the gear-driven centrifugal pump 5 can be inserted into the casing, and has the characteristic of easy disassembly and assembly.

[0034] As a specific example, a mounting base 406 for connecting to the stand 1 is further provided at the bottom of the box body 401 , and a U-shaped groove for connecting to the stand 1 is provided on the connecting base.

[0035] In some embodiments, the lubrication system 6 includes a lubrication oil tank 601, a gear pump 602, a first oil pipe 603, a second oil pipe 604 and a filter 605. The lubrication oil output end of the lubrication oil tank, the gear pump 602, the first oil pipe 603 and the lubrication oil input end of the gear box 4 are connected in sequence, and the lubrication oil output end of the gear box 4, the second oil pipe 604, the filter 605 and the lubrication oil input end of the lubrication oil tank are connected in sequence. In a specific implementation, the first oil pipe 603 is connected to the oil inlet hole 414 on the box cover 413, and the second oil pipe 604 is connected to the oil return hole 407 at the bottom of the box body 401. The lubrication oil pumped by the gear pump 602 of the lubrication system 6 enters the box body 402 through the oil inlet hole 414, lubricates the parts in the gear box 4, and then flows back to the lubrication oil tank 601 through the oil return hole 407 and the second oil pipe 604, thereby better ensuring the lubrication of the parts in the gear box 4.

[0036] In some embodiments, the water system includes a water tank 701, a first pipeline 702, a flow meter 703, a first valve 704, a vacuum gauge 705, a second pipeline 706, a pressure gauge 707, and a second valve 708. The water output end of the water tank 701, the flow meter 703, the first valve 704, the vacuum gauge 705, and the water input end of the gear-driven centrifugal pump 5 are sequentially connected through the first pipeline 702. The water output end of the gear-driven centrifugal pump 5, the pressure gauge 707, the second valve 708, and the water input end of the water tank 701 are sequentially connected through the second pipeline 706. With the above technical solution, the water pressure of the water supply system 7 can be adjusted by adjusting the second valve 708 and reading the reading of the pressure gauge 707, which provides convenience for the test.

[0037] The present invention also proposes a test method, comprising the following steps: Assemble the gear-driven centrifugal pump test device described in any one of the above items; Start the lubrication system 6, start the motor 2, adjust the speed of the motor 2 to the test speed, adjust the valve opening of the water supply system 7, adjust the water pressure of the water supply system 7 to the test pressure, and conduct a bench 1 test of the gear-driven centrifugal pump 5.

[0038] Specifically, assembling the gear-driven centrifugal pump test device described in any of the above items includes the following steps: installing the housing of the motor 2 and the gear box 4, then installing the transmission shaft 416, bearings, sleeves and other components of the gear box 4, connecting the motor 2 and the transmission shaft 416, and connecting the lubrication system 6 and the gear box 4; installing the gear-driven centrifugal pump 5 to be tested on the housing, and connecting the water supply system 7 and the gear-driven centrifugal pump 5.

[0039] In the specific implementation, the transmission gear 501 of the gear-driven centrifugal pump 5 can be rotated first to confirm that the gear-driven centrifugal pump 5 to be measured can rotate flexibly, and then the lubrication system 6 and the gear box 4 are connected, and the water supply system 7 and the gear-driven centrifugal pump 5 are connected. Then, the lubrication system 6 is turned on, the motor 2 is turned on, the speed of the motor 2 is adjusted to the test speed, and the second valve 708 is adjusted until the value of the pressure gauge 707 is the test pressure, and the performance and reliability of the gear-driven centrifugal pump 5 to be measured are tested.

[0040] In specific implementation, after the test is finished, the motor 2 and the lubricating oil system are shut down in sequence, and then the gear-driven centrifugal pump 5 can be disassembled.

[0041] The gear-driven centrifugal pump testing device proposed in the present invention can perform performance and platform reliability tests on gear-driven centrifugal pumps 5 of different models.

[0042] The above embodiments are only preferred embodiments for fully illustrating the present invention, and the protection scope of the present invention is not limited thereto. Equivalent substitutions or changes made by those skilled in the art on the basis of the present invention are all within the protection scope of the present invention. In the description of this specification, the description of reference terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics of the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine the different embodiments or examples described in this specification.

[0043] In the description of the present invention, it should be understood that the directions indicated by the terms "upper", "lower", "left", "right", "front", "rear", etc. are based on the attached Figure 1 The orientations represented by the coordinate system are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as a limitation on the present invention.

Claims

1. A gear-driven centrifugal pump test device, It is characterized in that It includes a stand, a motor, a gear box, a gear-driven centrifugal pump, a lubrication system and a water supply system; the gear box includes a box body and a gear transmission assembly installed in the box body, the motor and the gear box are respectively installed on the stand, and the power input end of the gear transmission assembly is transmission-connected with the power output end of the motor; a first mounting hole is provided on the box body of the gear box, and the gear-driven centrifugal pump is detachably fixedly installed on the box body, and the transmission gear of the gear-driven centrifugal pump enters the box body through the first mounting hole and meshes with the gear of the gear transmission assembly; the lubrication system is connected to the gear box, and the lubrication system is used to provide lubricating oil to the gear box; the water supply system is connected to the gear-driven centrifugal pump, and the water supply system is used to supply water to the gear-driven centrifugal pump.

2. The gear-driven centrifugal pump test device according to claim 1, It is characterized in that The gear transmission assembly includes a transmission shaft rotatably supported in the housing and a test gear mounted on the transmission shaft. The power input end of the transmission shaft is connected to the power output end of the motor through a coupling assembly, and the test gear is meshed with the transmission gear.

3. The gear-driven centrifugal pump testing device according to claim 2, It is characterized in that The box body includes a box cover and a box body body surrounded by a bottom wall and side walls, the upper side of the box body is open, and the box cover is detachable to close the opening; the side wall is provided with a second mounting hole and a bearing seat extending from the second mounting hole into the box body, and the transmission shaft is rotatably supported on the bearing seat by at least two bearings arranged at intervals.

4. The gear-driven centrifugal pump testing device according to claim 3, It is characterized in that The transmission shaft includes a first shaft section, a second shaft section, a third shaft section and a fourth shaft section which are arranged in sequence from left to right. The outer diameter of the second shaft section is larger than the outer diameter of the first shaft section, and the outer diameter of the second shaft section is larger than the outer diameter of the third shaft section. The first shaft section is connected to the coupling assembly. At least two of the bearings are arranged between the third shaft section and the bearing seat. The test gear is installed on the fourth shaft section. A fastener for tightening the test gear to the left is detachably installed at the end of the fourth shaft section. The bearing adjacent to the second shaft section of at least two of the bearings is supported to the left on the second shaft section. A sleeve which is mounted on the outer periphery of the transmission shaft is respectively clamped between the test gear and the bearing adjacent to the test gear and between two adjacent bearings.

5. The gear-driven centrifugal pump testing device according to claim 3, It is characterized in that The upper portion of the bearing seat is provided with a first through hole for lubricating oil to enter the inner cavity of the bearing seat, and the lower portion of the bearing seat is provided with a second through hole for lubricating oil to be discharged from the inner cavity of the bearing seat.

6. The gear-driven centrifugal pump testing device according to claim 3, It is characterized in that A retaining ring for supporting the rightmost bearing of at least two bearings to the left is detachably installed in the inner cavity of the bearing seat.

7. The gear-driven centrifugal pump testing device according to claim 3, It is characterized in that A third mounting hole is provided on the side wall at a position opposite to the second mounting hole, a blind cover is detachably installed in the third mounting hole, a first sealing ring is provided between the blind cover and the third mounting hole, a sealing cover surrounding the periphery of the transmission shaft is installed at the second mounting hole, and a second sealing ring is provided between the sealing cover and the second mounting hole.

8. The gear-driven centrifugal pump testing device according to claim 1, It is characterized in that The lubrication system includes a lubricating oil tank, a gear pump, a first oil pipe, a second oil pipe and a filter. The lubricating oil output end of the lubricating oil tank, the gear pump, the first oil pipe and the lubricating oil input end of the gear box are connected in sequence; the lubricating oil output end of the gear box, the second oil pipe, the filter and the lubricating oil input end of the lubricating oil tank are connected in sequence.

9. The gear-driven centrifugal pump testing device according to claim 1, It is characterized in that The water system includes a water tank, a first pipeline, a flow meter, a first valve, a vacuum gauge, a second pipeline, a pressure gauge, and a second valve. The water output end of the water tank, the flow meter, the first valve, the vacuum gauge, and the water input end of the gear-driven centrifugal pump are connected in sequence through the first pipeline, and the water output end of the gear-driven centrifugal pump, the pressure gauge, the second valve, and the water input end of the water tank are connected in sequence through the second pipeline.

10. A test method, It is characterized in that The following steps are involved: Assemble the gear-driven centrifugal pump test device according to any one of claims 1 to 9; Turn on the lubrication system, turn on the motor, adjust the motor speed to the test speed, adjust the valve opening of the water supply system, adjust the water pressure of the water supply system to the test pressure, and conduct a bench test on the gear-driven centrifugal pump.

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