阅读说明：本技术 一种船用水泵试验装置 (Marine water pump test device ) 是由 欧锐 刘承建 王勇 郭章润 张玉勇 于文明 于 2020-06-30 设计创作，主要内容包括：本发明公开了一种船用水泵试验装置,包括电机、扭矩仪、传动箱、第一安装座、滑动座和刚性进水管；所述第一安装座上可拆卸连接有安装板,该安装板上设有与待测水泵对应的第一安装孔；所述电机、扭矩仪和传动箱依次传动连接,传动箱输出齿轮与待测水泵的传动齿轮传动连接；所述刚性进水管沿滑动座的中心孔轴向滑动,刚性进水管两端分别固定有与待测水泵进水口对应配合的第一法兰和与软性进水管连接的第二法兰。其通用性好,适用于不同型号的船用水泵的试验,操作便捷,提高试验效率,降低成本。(The invention discloses a marine water pump test device which comprises a motor, a torque meter, a transmission case, a first mounting seat, a sliding seat and a rigid water inlet pipe, wherein the motor is connected with the first mounting seat; the first mounting seat is detachably connected with a mounting plate, and a first mounting hole corresponding to the water pump to be tested is formed in the mounting plate; the motor, the torque meter and the transmission box are sequentially connected in a transmission manner, and an output gear of the transmission box is connected with a transmission gear of the water pump to be detected in a transmission manner; the rigid water inlet pipe axially slides along a central hole of the sliding seat, and a first flange correspondingly matched with a water inlet of a water pump to be detected and a second flange connected with the soft water inlet pipe are respectively fixed at two ends of the rigid water inlet pipe. The test device is good in universality, suitable for tests of ship water pumps of different models, convenient to operate, capable of improving test efficiency and reducing cost.)

1. The utility model provides a marine water pump test device which characterized in that: the device comprises a motor (1), a torque meter (2), a transmission case (3), a first mounting seat (4), a sliding seat (6) and a rigid water inlet pipe (7);

the first mounting seat (4) is detachably connected with a mounting plate (5), and the mounting plate (5) is provided with a first mounting hole (51) corresponding to the water pump (10) to be tested;

the motor (1), the torque meter (2) and the transmission box (3) are sequentially connected in a transmission manner, and an output gear of the transmission box (3) is connected with a transmission gear of the water pump (10) to be detected in a transmission manner;

the rigid water inlet pipe (7) axially slides along a central hole of the sliding seat (6), and a first flange (71) correspondingly matched with a water inlet of the water pump (10) to be detected and a second flange (72) connected with the soft water inlet pipe (8) are respectively fixed at two ends of the rigid water inlet pipe (7).

2. The marine water pump test device of claim 1, wherein: the water pump structure is characterized in that a plurality of driving cylinders (61) are fixed on the side face, close to a water pump (10) to be measured, of the sliding seat (6), the end portion of a piston rod (62) of each driving cylinder (61) is fixedly connected with a pressing plate (63), a plurality of second mounting holes (65) connected with first flanges (71) are formed in the pressing plates (63), through holes are formed in the middles of the pressing plates (63), one ends of the through holes are communicated with a rigid water inlet pipe (7), and the other ends of the through holes are communicated with water inlet holes of the first flanges (71).

3. The marine water pump test device of claim 2, wherein: and a sealing ring (64) is arranged on the end surface of the first flange (71) connected with the water inlet of the water pump (10) to be tested.

4. The marine water pump test device of claim 2, wherein: the number of the driving cylinders (61) is three, and the three driving cylinders (61) are uniformly distributed on a concentric circle which takes the center of the center hole of the sliding seat (6) as the center of a circle.

5. The marine water pump test device of claim 1 or 2, wherein: a plurality of supporting bearings (66) are arranged in the central hole of the sliding seat (6), and the rigid water inlet pipe (7) is sleeved in the central hole of the supporting bearings (66) in a sliding mode.

6. The marine water pump test device of claim 1 or 2, wherein: the torque meter is characterized by further comprising a base (9), wherein a second mounting seat (91) used for fixing the torque meter (2) and a third mounting seat (92) used for fixing the transmission case (3) are arranged on the base (9).

7. The marine water pump test device of claim 6, wherein: the base (9) is provided with a guide rail (93), and the bottom ends of the first mounting seat (4), the second mounting seat (91), the third mounting seat (92) and the sliding seat (6) are provided with sliding grooves corresponding to the guide rail (93).

8. The marine water pump test device of claim 6, wherein: a plurality of backing plates (11) are arranged between the motor (1) and the base (9).

9. The marine water pump test device of claim 1 or 2, wherein: be equipped with on first mount pad (4) and hold mounting panel (5) lateral shifting's bar via hole (41), mounting panel (5) border is equipped with the installation arch of outside extension, be equipped with in the installation arch with first mount pad (4) fixed connection's third mounting hole (52).

10. The marine water pump test device of claim 1 or 2, wherein: the output gear of the transmission box (3) is in internal meshing transmission connection with a transmission gear of the water pump (10) to be detected through an inner gear ring (31), or the output gear of the transmission box (3) is in external meshing transmission connection with the transmission gear of the water pump (10) to be detected.

Technical Field

The invention relates to detection of a marine water pump, in particular to a marine water pump testing device.

Background

The cooling water pump of the marine diesel engine is complex in structure, large in size, large in weight, large in flow and high in parameter performance requirement, before leaving a factory, each cooling water pump needs to be subjected to a bench test to verify whether parameters such as flow and pressure meet design requirements, and a traditional test device generally comprises a motor, a motor coupling, a left torque meter coupling, a torque meter, a right torque meter coupling, pump mounting angle iron, a pump test coupling, a pump water inlet pipe, a pump water outlet pipe, a base and other parts. The motor, the motor coupling, the left coupling of torque meter, the right coupling of torque meter belong to the universal part of test bench, fix on the base, pump installation angle bar needs to carry out the design and manufacturing according to specific product type, the installation is fixed on the base, specific mounted position, need stretch out the corresponding length of pump tang face according to the experimental coupling of pump and adjust, make the experimental coupling of pump and the right coupling looks adaptation of torque meter, pump inlet tube and pump outlet pipe join in marriage the welding according to the pump mounted position scene. Adopt above-mentioned traditional test device, carry out the fore bay test of dispatching from the factory to marine diesel engine cooling water pump, have following not enough:

1. the test bed commonality is poor, and every kind of product all needs design and manufacture special pump installation angle bar, and every kind of product all needs to join in marriage to weld special inlet tube, has increased test bed manufacturing cost. The universal property is poor, the occupied area of the auxiliary storage area is large, the assembly, disassembly and installation efficiency is extremely low whether the same variety or different varieties are adopted, the utilization rate of test equipment is low, the production cost is greatly increased, the labor intensity of operators is high, and the environmental pollution degree of a workshop is high. And the number of parts is large, the searching is difficult, and the management is inconvenient.

2. Every product of changing, the pump installation angle bar needs to be changed the back and install the debugging again, tang, motor spindle, the torquemeter rotation center on the pump installation angle bar, and the three concentricity requires highly, needs bench test operator to have consummate operating skill, needs high skill operative employee, otherwise appears pump shaft and torquemeter concentricity overproof condition easily, causes the pump shaft runout overproof. In the test process, the axial vibration of the superposed pump shaft is inevitable, the torque meter needs to bear the dynamic irregular variable load effect, the damage is easy to occur, and the failure rate of the torque meter is high.

3. To the test product of same batch, every time a cooling water pump is changed, the cooling water pump inlet tube needs to be completely disassembled and removed, and the tested cooling water pump can be taken down, liquid in the tube in the moving process can drip on the workshop site, and a large amount of liquid can also drip on the storage position to pollute the workshop environment.

4. Before a cooling water pump is subjected to bench test, a pump test coupling is required to be installed at the position where a transmission gear is installed on the cooling water pump to be tested, the pump test coupling is used as a tool to be connected with a torque meter coupling, the pump test coupling is required to be disassembled on site after the test is completed, the environment is influenced, the pump is required to be transported back to an assembly room to assemble the transmission gear after the pump test coupling is disassembled, the whole process is complicated, the assembly and the test are repeated, and the logistics, management and operation costs are additionally increased;

disclosure of Invention

The invention aims to provide a marine water pump testing device which is good in universality, suitable for testing marine water pumps of different models, convenient to operate, capable of improving testing efficiency and reducing cost.

The invention relates to a marine water pump test device which comprises a motor, a torque meter, a transmission case, a first mounting seat, a sliding seat and a rigid water inlet pipe, wherein the motor is connected with the torque meter; the first mounting seat is detachably connected with a mounting plate, and a first mounting hole corresponding to the water pump to be tested is formed in the mounting plate; the motor, the torque meter and the transmission box are sequentially connected in a transmission manner, and an output gear of the transmission box is connected with a transmission gear of the water pump to be detected in a transmission manner; the rigid water inlet pipe axially slides along a central hole of the sliding seat, and a first flange correspondingly matched with a water inlet of a water pump to be detected and a second flange connected with the soft water inlet pipe are respectively fixed at two ends of the rigid water inlet pipe.

Furthermore, a plurality of driving cylinders are fixed on the side face, close to the water pump to be measured, of the sliding seat, the end portion of a piston rod of each driving cylinder is fixedly connected with the pressing plate, a plurality of second mounting holes connected with the first flange are formed in the pressing plate, a through hole is formed in the middle of the pressing plate, one end of the through hole is communicated with the rigid water inlet pipe, and the other end of the through hole is communicated with the water inlet hole of the first flange. For the same product, after the water pump to be measured is fixed on the mounting plate, the forward acting button is started, the piston rod of the driving cylinder extends out, and the first flange and the rigid water inlet pipe are driven by the pressing plate to move towards the end face of the water inlet of the water pump to be measured and tightly press the end face until the set pressure is reached; after the bench test of the water pump to be tested is completed, the reverse action button is started, the piston rod of the driving cylinder returns, the first flange and the rigid water inlet pipe are driven by the pressing plate to be far away from the end face of the water inlet of the water pump to be tested, the piston rod moves to the set position, and a space is provided for the disassembly of the water pump to be tested. By adopting the structure, the driving cylinder provides power for the axial movement of the rigid water inlet pipe on the one hand, and provides pressing force for the close fitting of the first flange and the water inlet of the water pump to be detected on the other hand, the first flange and the water inlet of the water pump to be detected are not required to be fixed by additionally arranging a fastener, the replacement speed is high, the test efficiency is high, the automatic and rapid pressing and the retreating are realized, and the automatic development requirement is met.

Further, the driving cylinder is a bidirectional control oil cylinder or an air cylinder.

Furthermore, the end face of first flange and the water pump water inlet that awaits measuring is connected is equipped with the sealing washer, and the sealing washer plays end face seal effect, has avoided liquid to pass through first flange joint position seepage in the test process.

Furthermore, the number of the driving cylinders is three, and the three driving cylinders are uniformly distributed on a concentric circle which takes the center of the center hole of the sliding seat as the center of a circle.

Further, be equipped with a plurality of support bearing in the centre bore of sliding seat, the rigidity inlet tube slides and cup joints in support bearing's centre bore, and rigid inlet tube shift position has been injectd in support bearing's setting, has separated rigidity inlet tube and sliding seat simultaneously, has avoided the sliding seat because of long-term friction the damage appears, has prolonged the life of sliding seat.

And the base is provided with a second mounting seat for fixing the torque meter and a third mounting seat for fixing the transmission case.

Furthermore, a guide rail is arranged on the base, and sliding grooves which are correspondingly matched with the guide rail are formed in the bottom ends of the first mounting seat, the second mounting seat, the third mounting seat and the sliding seat. The guide rail and the chute are matched, so that the positions of the torque meter, the transmission case and the water pump to be tested can be conveniently adjusted, the test device is further suitable for tests of water pumps to be tested of different models, and the universality of the test device is improved.

Further, be equipped with the polylith backing plate between motor and the base, improve motor center height, increase the accommodation space of the water pump that awaits measuring, adapt to different specification size demands, reinforcing commonality.

Further, be equipped with the bar via hole of holding mounting panel lateral shifting on the first mount pad, the mounting panel border is equipped with the installation arch of outwards extending, be equipped with the third mounting hole with first mount pad fixed connection in the installation arch. The transverse movement of the mounting plate is realized through the strip-shaped through holes in the first mounting seat, so that the transverse movement of the water pump to be detected on the mounting plate can be driven, and the relative position adjustment of the transmission gear of the water pump to be detected and the output end of the transmission box is realized.

Further, the transmission case output gear is in internal engagement transmission connection with a transmission gear of the water pump to be detected through an inner gear ring, or the transmission case output gear is in external engagement transmission connection with the transmission gear of the water pump to be detected. It should be noted that the transmission case can also be designed as a speed-up gear case to adapt to the test requirements of some high-speed water pumps, and the universality of the test device is improved.

Compared with the prior art, the invention has the following beneficial effects.

1. According to the invention, the transmission case is additionally arranged between the torque meter and the water pump to be tested, the motor, the torque meter and the transmission case are sequentially in transmission connection, and the output gear of the transmission case is in transmission connection with the transmission gear of the water pump to be tested, so that the effective transmission of power is realized. The transmission case is arranged to absorb the dynamic irregular variable load of the water pump to be tested in the test process, and has an isolation protection effect on the torque meter, so that the torque meter can work stably, the problem of high failure rate of the torque meter is solved, and the reliability of the test parameters of the torque meter is improved; on the other hand, the output end of the transmission box can be directly in transmission connection with the transmission gear of the water pump to be tested, a pump test coupling does not need to be additionally designed, the production and manufacturing cost is reduced, the procedures of disassembling and assembling the pump test coupling are reduced, the water pump which is completed in the test does not need to be returned to an assembly workshop to be assembled with the transmission gear, the test process is simplified, and the test efficiency is improved.

2. The rigid water inlet pipe axially and slidably arranged on the sliding seat is used for ensuring the water inlet requirement of the water pump to be tested, the rigid water inlet pipe only axially moves without being detached for moving, so that liquid in the pipe is prevented from dripping on a workshop site in the moving process, and the workshop environment is improved. And just can adapt to the water inlet of the water pump that awaits measuring of different models through changing the first flange of unidimensional, the commonality is good, has saved the parking space of experimental spare part, the management of being convenient for.

3. The invention can realize the test of the water pump stands with different models by replacing the mounting plates and the first flanges with different sizes and models, has simple debugging process, lower requirement on the technical ability of operators, high efficiency and low cost.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of a first mounting base of the present invention;

fig. 3 is a schematic view of the structure of the mounting plate of the present invention.

In the figure, 1-motor, 11-backing plate, 12-first coupling, 2-torquemeter, 21-second coupling, 22-third coupling, 3-transmission case, 31-inner gear ring, 32-fourth coupling, 4-first mounting seat, 41-bar via hole, 42-fourth mounting hole, 5-mounting plate, 51-first mounting hole, 52-third mounting hole, 6-sliding seat, 61-driving cylinder, 62-piston rod, 63-pressing plate, 64-sealing ring, 65-second mounting hole, 66-supporting bearing, 7-rigid water inlet pipe, 71-first flange, 72-second flange, 8-soft water inlet pipe, 81-third flange, 9-base, 91-second mounting seat, 92-third mounting seat, 93-guide rail, and 10-water pump to be measured.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings.

Referring to fig. 1 to 3, the marine water pump testing device includes a motor 1, a torque meter 2, a transmission case 3, a first mounting seat 4, a sliding seat 6 and a rigid water inlet pipe 7; the first mounting seat 4 is detachably connected with a mounting plate 5, and a first mounting hole 51 corresponding to the water pump 10 to be measured is formed in the mounting plate. The motor 1, the torque meter 2 and the transmission case 3 are sequentially connected in a transmission mode, an output gear of the transmission case 3 is connected with a transmission gear of the water pump 10 to be detected in a transmission mode, specifically, the output gear of the transmission case 3 is connected with the transmission gear of the water pump 10 to be detected in an inner meshing transmission mode through an inner gear ring 31, or the output gear of the transmission case 3 is connected with the transmission gear of the water pump 10 to be detected in an outer meshing transmission mode. It should be noted that the transmission case can also be designed as a speed-up gear case to adapt to the test requirements of some high-speed water pumps, and the universality of the test device is improved. The rigid water inlet pipe 7 axially slides along the central hole of the sliding seat 6, and a first flange 71 correspondingly matched with the water inlet of the water pump 10 to be detected and a second flange 72 connected with the soft water inlet pipe 8 are respectively fixed at two ends of the rigid water inlet pipe 7.

The transmission case 3 is used for absorbing the dynamic irregular variable load of the water pump 10 to be tested in the test process, plays a role in isolating and protecting the torque meter 2, ensures that the torque meter 2 can work stably, solves the problem of high failure rate of the torque meter 2 and improves the reliability of the test parameters of the torque meter 2; on the other hand, the output end of the transmission box 3 can be directly in transmission connection with the transmission gear of the water pump 10 to be tested, a pump test coupling does not need to be additionally designed, the production and manufacturing cost is reduced, the procedures of disassembling and assembling the pump test coupling are reduced, the water pump which is completed in the test does not need to be returned to an assembly workshop to be assembled with the transmission gear, the test process is simplified, and the test efficiency is improved.

The rigid water inlet pipe 7 only moves axially without being detached to move, so that liquid in the pipe is prevented from dripping on a workshop site in the moving process, and the workshop environment is improved. And the water inlets of the water pumps 10 to be tested of different models can be adapted by replacing the first flanges 71 with different sizes, so that the universality is good, the storage space of the test spare parts is saved, and the management is convenient.

As a preferred embodiment of the present invention, three driving cylinders 61 are fixed on the side surface of the sliding seat 6 close to the water pump 10 to be measured, and the three driving cylinders 61 are uniformly distributed on a concentric circle with the center of the central hole of the sliding seat 6 as the center of circle. The end part of the piston rod 62 of the driving cylinder 61 is fixedly connected with a compression plate 63, three second mounting holes 65 connected with a first flange 71 are arranged on the compression plate 63, a through hole is arranged in the middle of the compression plate 63, one end of the through hole is communicated with the rigid water inlet pipe 7, and the other end of the through hole is communicated with a water inlet hole of the first flange 71. For the same product, after the water pump 10 to be measured is fixed on the mounting plate 5, the forward acting button is started, the piston rod 62 of the driving cylinder 61 extends out, the pressing plate 63 is driven to axially move towards the position of the water pump 10 to be measured, and the first flange 71 and the rigid water inlet pipe 7 are driven by the pressing plate 63 to move towards the end face of the water inlet of the water pump 10 to be measured and tightly press the end face until the set pressure is reached; after the bench test of the water pump 10 to be tested is completed, the reverse action button is started, the piston rod 62 of the driving cylinder 61 retracts, the first flange 71 and the rigid water inlet pipe 7 are driven by the pressing plate 63 to be far away from the end face of the water inlet of the water pump 10 to be tested, and the piston rod moves to a set position to provide a space for disassembling the water pump 10 to be tested. Adopt above-mentioned structure, driving cylinder 61 provides power for rigidity inlet tube 7 axial displacement on the one hand, and on the other hand provides the packing force for first flange 71 and the closely laminating of water pump 10 water inlet that awaits measuring, need not to set up the fastener in addition and fixes first flange 71 and the water pump 10 water inlet that awaits measuring, and it is fast to change, and test efficiency is high, and automatic quick compress tightly and move back, has adapted to the automated development demand. The end face of the first flange 71 connected with the water inlet of the water pump 10 to be tested is provided with the sealing ring 64, the sealing ring 64 plays a role in end face sealing, and liquid is prevented from leaking through the connecting position of the first flange 71 in the test process.

As a preferred embodiment of the present invention, two support bearings 66 are disposed in the central hole of the sliding seat 6, the two support bearings 66 are respectively located at two ends of the central hole of the sliding seat 6, the rigid water inlet pipe 7 is slidably sleeved in the central hole of the support bearings 66, the radial position of the rigid water inlet pipe 7 is limited by the arrangement of the support bearings 66, the radial movement of the rigid water inlet pipe 7 is effectively prevented, the rigid water inlet pipe 7 and the sliding seat 6 are separated, the sliding seat 6 is prevented from being damaged due to long-term friction, and the service life of the sliding seat 6 is prolonged.

In a preferred embodiment of the present invention, the torque meter further includes a base 9, and the base 9 is provided with a second mounting seat 91 for fixing the torque meter 2 and a third mounting seat 92 for fixing the transmission case 3. Be equipped with guide rail 93 on the base 9, first mount pad 4, second mount pad 91, third mount pad 92 and 6 bottoms of sliding seat all are equipped with and correspond the complex spout with guide rail 93. The guide rail 93 is matched with the sliding groove, so that the positions of the torque meter 2, the transmission case 3 and the water pump 10 to be tested can be conveniently adjusted, the test device is further suitable for tests of the water pumps 10 to be tested of different models, and the universality of the test device is improved. Be equipped with polylith backing plate 11 between motor 1 and the base 9 to improve motor center height, increase the accommodation space of the water pump that awaits measuring, adapt to different specification size demands, reinforcing commonality.

As a preferred embodiment of the present invention, referring to fig. 2 and 3, the first mounting seat 4 is provided with a strip-shaped through hole 41 for accommodating the lateral movement of the mounting plate 5, the edge of the mounting plate 5 is provided with an outwardly extending mounting protrusion, the mounting protrusion is provided with a third mounting hole 52 fixedly connected with the first mounting seat 4, the first mounting seat 4 is provided with a fourth mounting hole 42 corresponding to the third mounting hole 52, and the mounting plate 5 and the first mounting seat 4 are fixedly connected by sequentially passing through the third mounting hole 52 and the fourth mounting hole 42 by using a bolt fastener. Through set up bar via hole 41 on first mount pad 4, realized the lateral shifting of mounting panel 5, and then can drive the lateral shifting of the water pump 10 that awaits measuring that is fixed in on mounting panel 5, realized the relative position control of the drive gear of the water pump 10 that awaits measuring and transmission case 3 output. The water pump 10 that awaits measuring can realize multidirectional position control, realizes the high position control of the water pump 10 that awaits measuring through changing not unidimensional mounting panel 10, through the position of adjusting first mount pad 4 along guide rail 93 on the base 9, realizes the position control about the water pump 10 that awaits measuring, through removing mounting panel 5 along bar via hole 41, realizes the fore-and-aft position control of the water pump 10 that awaits measuring.

During a specific test, firstly, assembling a test device, and specifically comprising the following steps:

s1, fixing the motor 1 on the backing plate 11 on the surface of the base 9, fixedly connecting the output end of the motor with the first coupling 12, fixing the torquemeter 2 on the second mounting seat 91 of the base 9, fixing the transmission case 3 on the third mounting seat 92 of the base 9, and axially adjusting the positions of the torquemeter 2 and the transmission case 3 along the guide rail 93 on the base 9, so that the motor 1, the torquemeter 2 and the transmission case 3 can be normally assembled. One end of the torque meter 2 is in transmission connection with the first coupling 12 at the output end of the motor 1 through the second coupling 21, and the other end is in transmission connection with the fourth coupling 32 at the input end of the transmission case 3 through the third coupling 22. The torquemeter 2 is required to bear both the torque transmission effect and the torque parameter test, the requirement on the concentricity of front and back installation is high, the debugging of equipment installation professionals is required, and after the debugging is finished, the torquemeter is fixedly installed on the second installation seat 91 of the base 9 and is kept still. In order to reduce the subsequent adjustment steps, the transmission case 3 is fixed after being debugged by equipment installation professionals.

S2, selecting the corresponding mounting plate 5 according to the size of the water pump 10 to be measured, fixing the mounting plate 5 on the first mounting seat 4 by using the bolt fastener, fixing the water pump 10 to be measured on the mounting plate 5 by using the bolt fastener, and adjusting the relative positions of the first mounting seat 4 and the transmission case 3 along the guide rail 93 on the base 9 to ensure that the two can be accurately connected. The output gear of the transmission case 3 is in internal gearing transmission connection with the transmission gear of the water pump 10 to be measured through the inner gear ring 31.

S3, adjusting the position of the sliding seat 6 along the guide rail 93 on the base 9 to ensure that the water pump 10 to be tested has enough space for installation and disassembly, selecting the corresponding first flange 71 according to the size of the water pump 10 to be tested, fixing the first flange on the pressure plate 63 by using a bolt fastener, fixedly connecting the second flange 72 at the end part of the rigid water inlet pipe 7 and the third flange 81 at the end part of the soft water inlet pipe 8 by using the bolt fastener, communicating the other end of the soft water inlet pipe 8 with the water storage tank, communicating the water outlet of the water pump 10 to be tested with a water outlet pipeline in a conventional mode, and completing the assembly of the test.

For the bench test of a plurality of water pumps 10 to be tested with the same model, after the water pumps 10 to be tested are fixedly mounted on the mounting plate 5, the driving cylinder 61 is started, the piston rod 62 of the driving cylinder 61 extends out to drive the pressing plate 63 to axially move towards the position of the water pump 10 to be tested, and the pressing plate 63 drives the first flange 71 and the rigid water inlet pipe 7 to move towards the end face of the water inlet of the water pump 10 to be tested and tightly press the end face until the set pressure is reached. After the bench test of the water pump 10 to be tested is completed, the reverse action button is started, the piston rod 62 of the driving cylinder 61 retracts, the first flange 71 and the rigid water inlet pipe 7 are driven by the pressing plate 63 to be far away from the end face of the water inlet of the water pump 10 to be tested, and the piston rod moves to a set position to provide a space for disassembling the water pump 10 to be tested.

For the bench test of the water pumps 10 to be tested with different models, the corresponding mounting plate 5, the first flange 71 and the sealing ring 64 are selected according to the water pumps 10 to be tested, the number of parts is small, the test preparation time is saved, and the test efficiency is improved. The debugging process is simple, the requirement on the technical ability of operators is low, the number of spare parts is small, the management is convenient, and the cost is reduced.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.