A motor-driven auxiliary water supply steam pump test system

Abstract

The present invention discloses a motor-driven auxiliary water supply pneumatic pump test system, comprising a water reservoir, a pre-boosting pump, a test pump device, a lubricating water circulation system and a water tank, wherein the test pump device comprises a motor, a speed increasing box and a test pump group; one end of the speed increasing box is connected to the motor through a motor-end coupling, and the other end is connected to the test pump group through a pump-end coupling; the inlet of the pre-boosting pump is connected to the water reservoir through a pipeline, and the outlet is connected to the inlet of the test pump group through an inlet pipeline; the outlet of the test pump group is connected to the water reservoir through an outlet pipeline. The motor-driven auxiliary water supply pneumatic pump test system of the present invention adopts a driving mode of motor drive and speed increasing box speed increasing to realize the performance test of the pump-end hydraulic components at the rated speed of the auxiliary water supply pneumatic pump, thereby improving the accuracy and credibility of the internal test of the auxiliary water supply pneumatic pump.

Description

Technical Field

[0001] The invention relates to a motor-driven auxiliary water supply pneumatic pump test system. Background Art

[0002] At present, the auxiliary water supply pneumatic pump test system uses steam as the driving force, which has very high requirements and corresponding limitations for the test site and test personnel. The test cost of steam drive is also relatively high, which is not conducive to the subsequent technical research and development of the auxiliary water supply pneumatic pump. Summary of the invention

[0003] The purpose of the present invention is to overcome the defects of the prior art and provide a motor-driven auxiliary water supply pneumatic pump test system, which adopts a motor-driven and speed-increasing gearbox-driven driving mode to realize the performance test of the pump end hydraulic components at the rated speed of the auxiliary water supply pneumatic pump, thereby improving the accuracy and reliability of the internal test of the auxiliary water supply pneumatic pump.

[0004] The technical solution to achieve the above purpose is: a motor-driven auxiliary water supply pneumatic pump test system, including a water reservoir, a front booster pump, a test pump device, a lubricating water circulation system and a water tank, wherein:

[0005] The test pump device comprises a motor, a speed increasing box and a test pump unit; one end of the speed increasing box is connected to the motor through a motor end coupling, and the other end is connected to the test pump unit through a pump end coupling;

[0006] The inlet of the pre-boost pump is connected to the water reservoir through a pipeline, and the outlet is connected to the inlet of the test pump group through a water inlet pipeline; the water inlet pipeline is provided with an inlet valve, an exhaust valve and an inlet pressure gauge;

[0007] The outlet of the test pump group is connected to the water reservoir through a water outlet pipe; the water outlet pipe is provided with an outlet pressure gauge, an exhaust valve, an outlet valve and a flow meter;

[0008] The water tank is connected to the test pump group through a lubricating water circulation pipeline. The lubricating water circulation system includes a bearing lubricating water pump, a lubricating water outlet valve, a filter and a lubricating water pressure gauge which are sequentially arranged on the lubricating water circulation pipeline along the water flow direction.

[0009] The above-mentioned motor-driven auxiliary water supply pneumatic pump test system, wherein the test pump group includes a pump casing, a pump cover, a counterweight plate, a rotor, an axial force balancing device and a guide vane; the rotor mainly includes a pump shaft, an inducer, a primary impeller and a secondary impeller, wherein:

[0010] The pump housing is arranged transversely, and an outlet of the test pump assembly is arranged at the upper end of the pump housing;

[0011] The pump cover is arranged on one side of the pump housing, a conical flow guide cap is arranged inside the pump cover, and the pump cover is the inlet of the test pump group;

[0012] The pump shaft is transversely arranged in the pump housing, one end of the pump shaft is a pump end, and the other end is a turbine end, the turbine end is located on the other side of the pump housing, and a mechanical seal is used to seal the connection between the turbine end and the pump housing;

[0013] The inducer, the first-stage impeller, the secondary impeller and the axial force balancing device are sequentially arranged at the pump end of the pump shaft; the guide vanes are arranged on the outside of the first-stage impeller and the secondary impeller;

[0014] The counterweight plate is arranged at the turbine end of the pump shaft, and the counterweight plate is located outside the mechanical seal;

[0015] A central water chamber is provided between the mechanical seal and the axial force balancing device;

[0016] Two water-lubricated radial bearings are arranged in the central water chamber, and the two water-lubricated radial bearings are respectively sleeved on the pump shaft.

[0017] The above-mentioned motor-driven auxiliary water supply pneumatic pump test system, wherein the axial force balancing device comprises a balancing plate, a balancing disc and a thrust ring, and the balancing plate, the balancing disc and the thrust ring are coaxially arranged in sequence from front to back; the balancing disc is arranged on the pump shaft, and the balancing plate and the thrust ring are respectively fixed in the pump housing;

[0018] The balancing plate is located behind the secondary impeller;

[0019] The balancing disc is in a cone shape, and the rear surface of the balancing plate is in a concave structure that matches the conical balancing disc;

[0020] There is a gap between the balancing disc and the balancing plate, and an annular surfacing layer is provided between the balancing disc and the balancing plate, and the surfacing layer is located at the periphery of the gap between the balancing disc and the balancing plate;

[0021] The thrust ring is fixed to the rear surface of the balancing disc by bolts.

[0022] In the above-mentioned motor-driven auxiliary water supply pneumatic pump test system, the test pump group is arranged on a test base.

[0023] In the above-mentioned motor-driven auxiliary water supply steam-driven pump test system, one end of the pump-end coupling is connected to the speed increaser, and the other end is connected to the turbine end of the pump shaft of the test pump group.

[0024] The motor-driven auxiliary water-feed pneumatic pump test system of the present invention adopts a motor-driven, speed-increasing gearbox-driven driving mode to realize the performance test of the pump-end hydraulic components at the rated speed of the auxiliary water-feed pneumatic pump, thereby improving the accuracy and reliability of the internal test of the auxiliary water-feed pneumatic pump; it can be used for the hydraulic performance test of the auxiliary water-feed pneumatic pump and the research and development and exploration of the structure and performance of the hydraulic components, and plays an important role in the technical research of key components of the auxiliary water-feed pneumatic pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural diagram of the motor-driven auxiliary water supply pneumatic pump test system of the present invention;

[0026] Figure 2 A structural diagram of an experimental pump device of a motor-driven auxiliary water supply pneumatic pump test system of the present invention;

[0027] Figure 3 This is the structural diagram of the experimental pump group. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the technical solution of the present invention, the specific implementation methods thereof are described in detail below in conjunction with the accompanying drawings:

[0029] See also Figure 1 , Figure 2 and Figure 3 The best embodiment of the present invention is a motor-driven auxiliary water supply pneumatic pump test system, which includes a water reservoir 100, a front booster pump 200, a test pump device, a lubricating water circulation system and a water tank 300.

[0030] The test pump device includes a motor 1, a speed increaser 2 and a test pump unit 3; one end of the speed increaser 2 is connected to the motor 1 through a motor-end coupling 4, and the other end is connected to the test pump unit 3 through a pump-end coupling 5.

[0031] The inlet of the pre-boost pump 200 is connected to the water reservoir 100 through a pipeline, and the outlet is connected to the inlet of the test pump group 3 through an inlet pipe; the inlet pipe is provided with an inlet valve 201, an exhaust valve 202 and an inlet pressure gauge 203; the outlet of the test pump group 3 is connected to the water reservoir 100 through an outlet pipe; the outlet pipe is provided with an outlet pressure gauge 301, an exhaust valve 302, an outlet valve 303 and a flow meter 304; the water tank 300 is connected to the test pump group 3 through a lubricating water circulation pipe, and the lubricating water circulation system includes a bearing lubricating water pump 401, a lubricating water outlet valve 402, a filter 403 and a lubricating water pressure gauge 404 which are sequentially arranged on the lubricating water circulation pipe along the water flow direction.

[0032] Please see again Figure 3The test pump unit 3 includes a pump casing 31, a pump cover 34, a counterweight plate 35, a rotor, an axial force balancing device and a guide vane 38; the rotor mainly includes a pump shaft 32, an inducer 361, a primary impeller 362 and a secondary impeller 363.

[0033] The pump casing 31 is arranged horizontally, and the upper end of the pump casing 31 is provided with the outlet of the test pump group; the pump cover 34 is arranged on one side of the pump casing 31, and a conical guide cap 39 is arranged inside the pump cover 34, and the pump cover 34 is the inlet of the test pump group; the pump shaft 32 is arranged horizontally in the pump casing 31, one end of the pump shaft 32 is the pump end, and the other end is the turbine end, the turbine end is located on the other side of the pump casing 31, and the connection between the turbine end and the pump casing is sealed by a mechanical seal 33; one end of the pump end coupling 5 is connected to the speed increaser 2, and the other end is connected to the turbine end of the pump shaft 32 of the test pump group 3.

[0034] The inducer 361 , the first-stage impeller 362 , the secondary impeller 363 and the axial force balancing device are sequentially arranged at the pump end of the pump shaft 32 ; the guide vane 38 is arranged on the outer sides of the first-stage impeller 362 and the secondary impeller 362 .

[0035] The counterweight plate 35 is arranged at the turbine end of the pump shaft 32, and the counterweight plate 35 is located on the outside of the mechanical seal 33; a central water chamber 311 is arranged between the mechanical seal 33 and the axial force balancing device; two water-lubricated radial bearings 312 are arranged in the central water chamber 311, and the two water-lubricated radial bearings 312 are respectively sleeved on the pump shaft 32.

[0036] The axial force balancing device includes a balancing plate 371, a balancing disc 372 and a thrust ring 373, which are coaxially arranged in sequence from front to back; the balancing disc 372 is arranged on the pump shaft 32, and the balancing plate 371 and the thrust ring 373 are respectively fixed in the pump casing 31; the balancing plate 371 is located behind the secondary impeller 363; the balancing disc 372 is conical, and the rear surface of the balancing plate 371 is a concave structure that matches the conical balancing disc; there is a gap between the balancing disc 372 and the balancing plate 371, and an annular surfacing layer is arranged between the balancing disc 372 and the balancing plate 371, and the surfacing layer is located on the periphery of the gap between the balancing disc and the balancing plate; the thrust ring 373 is fixed to the rear surface of the balancing disc 372 by bolts.

[0037] The test pump assembly 3 is arranged on a test base 4 .

[0038] The motor-driven auxiliary water supply steam pump test system of the present invention has the following characteristics:

[0039] (1) Motor 1 is a high-voltage, high-power motor;

[0040] (2) The pump shaft 32 is lubricated and cooled by water drawn from the first-stage impeller 362;

[0041] (3) The turbine end bearing of the pump shaft 32 and the pump casing are sealed with a mechanical seal;

[0042] (4) The axial force generated by the rotor of the test pump unit 3 during operation is borne by the balancing disc, balancing plate and thrust ring;

[0043] (5) The weight of the entire rotor and the radial force generated during operation are borne by two water-lubricated radial bearings 312 installed in the central water chamber;

[0044] (6) The turbine impeller is eliminated and a counterweight plate 35 is used to balance the rotor at both ends of the pump group.

[0045] (7) The pump end dimensions and bearing dimensions of the pump shaft retain the dimensions of the original product pump main shaft, and the turbine end dimensions of the pump shaft are designed according to the needs of the test system to connect the drive device; the turbine impeller is eliminated, a mechanical seal is used at the connection with the pump casing, and a counterweight plate 35 is added;

[0046] (8) The hydraulic models and processing dimensions of the main components of the pump end of the test pump group 3, such as the impeller, guide vane, balance disc, balance plate and thrust ring, are consistent with those of the product pump (auxiliary water supply pneumatic pump).

[0047] The motor-driven auxiliary water supply steam pump test system of the present invention has the following advantages:

[0048] 1) Adopt the driving mode of motor drive and speed increaser to realize the performance test of pump end hydraulic components at rated speed of auxiliary water supply steam pump, so as to improve the accuracy and reliability of internal test of auxiliary water supply steam pump;

[0049] 2) The pump shaft of the test pump unit shall retain the installation dimensions of the main shaft pump end of the original auxiliary water supply steam-driven pump, and the dimensions of the turbine end shall be processed according to the connection requirements of the test system to ensure the universality of the installation dimensions of the pump end components of the pump shaft;

[0050] 3) The original steam-driven main components such as the impeller and cylinder head at the turbine end are eliminated, and mechanical seals are used to seal the turbine end of the pump shaft and the pump casing to achieve the connection between the pump shaft and the speed increaser;

[0051] 4) A special base for the auxiliary water supply pneumatic pump test system has been developed. The pump end installation dimensions of the test base are consistent with the product base, ensuring the universality of the pump casing on this base;

[0052] 5) The test pump set uses all pump end parts such as pump casing, pump cover, impeller, etc. of the product pump to ensure the universality of pump end parts;

[0053] 6) The test pump unit uses a counterweight plate to replace the original turbine impeller weight to keep both ends of the pump rotor balanced.

[0054] In summary, the motor-driven auxiliary water supply pneumatic pump test system of the present invention adopts a motor-driven, speed-increasing gearbox-driven driving mode to realize the pump-end hydraulic component performance test at the rated speed of the auxiliary water supply pneumatic pump, thereby improving the accuracy and reliability of the internal test of the auxiliary water supply pneumatic pump; it can be used for the hydraulic performance test of the auxiliary water supply pneumatic pump and the research and development and exploration of the structure and performance of hydraulic components, and plays an important role in the technical research of key components of the auxiliary water supply pneumatic pump.

[0055] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present invention, and are not intended to limit the present invention. As long as they are within the spirit of the present invention, any changes or modifications to the above embodiments will fall within the scope of the claims of the present invention.

Claims

1. A motor-driven auxiliary water supply pneumatic pump test system, characterized in that: It includes a water reservoir, a front booster pump, a test pump device, a lubricating water circulation system and a water tank, including: The test pump device comprises a motor, a speed increasing box and a test pump unit; one end of the speed increasing box is connected to the motor through a motor end coupling, and the other end is connected to the test pump unit through a pump end coupling; The inlet of the pre-boost pump is connected to the water reservoir through a pipeline, and the outlet is connected to the inlet of the test pump group through a water inlet pipeline; the water inlet pipeline is provided with an inlet valve, an exhaust valve and an inlet pressure gauge; The outlet of the test pump group is connected to the water reservoir through a water outlet pipe; the water outlet pipe is provided with an outlet pressure gauge, an exhaust valve, an outlet valve and a flow meter; The water tank is connected to the test pump group through a lubricating water circulation pipeline, and the lubricating water circulation system includes a bearing lubricating water pump, a lubricating water outlet valve, a filter and a lubricating water pressure gauge which are sequentially arranged on the lubricating water circulation pipeline along the water flow direction; The test pump assembly includes a pump casing, a pump cover, a counterweight plate, a rotor, an axial force balancing device and a guide vane; the rotor mainly includes a pump shaft, an inducer, a primary impeller and a secondary impeller, wherein: The pump housing is arranged transversely, and an outlet of the test pump assembly is arranged at the upper end of the pump housing; The pump cover is arranged on one side of the pump housing, a conical flow guide cap is arranged inside the pump cover, and the pump cover is the inlet of the test pump group; The pump shaft is transversely arranged in the pump housing, one end of the pump shaft is a pump end, and the other end is a turbine end, the turbine end is located on the other side of the pump housing, and a mechanical seal is used to seal the connection between the turbine end and the pump housing; The inducer, the first-stage impeller, the secondary impeller and the axial force balancing device are sequentially arranged at the pump end of the pump shaft; the guide vanes are arranged on the outside of the first-stage impeller and the secondary impeller; The counterweight plate is arranged at the turbine end of the pump shaft, and the counterweight plate is located outside the mechanical seal; the counterweight plate is used to replace the weight of the original turbine impeller to keep the two ends of the pump rotor balanced; A central water chamber is provided between the mechanical seal and the axial force balancing device; Two water-lubricated radial bearings are arranged in the central water chamber, and the two water-lubricated radial bearings are respectively sleeved on the pump shaft; One end of the pump-end coupling is connected to the speed increasing box, and the other end is connected to the turbine end of the pump shaft of the test pump group.

2. A motor-driven auxiliary water supply pneumatic pump test system according to claim 1, characterized in that: The axial force balancing device comprises a balancing plate, a balancing disc and a thrust ring, wherein the balancing plate, the balancing disc and the thrust ring are coaxially arranged in sequence from front to back; the balancing disc is arranged on the pump shaft, and the balancing plate and the thrust ring are respectively fixed in the pump housing; The balancing plate is located behind the secondary impeller; The balancing disc is in a cone shape, and the rear surface of the balancing plate is in a concave structure that matches the conical balancing disc; There is a gap between the balancing disc and the balancing plate, and an annular surfacing layer is provided between the balancing disc and the balancing plate, and the surfacing layer is located at the periphery of the gap between the balancing disc and the balancing plate; The thrust ring is fixed to the rear surface of the balancing disc by bolts.

3. The motor-driven auxiliary water supply pneumatic pump test system according to claim 1 is characterized in that: The test pump assembly is arranged on a test base.

Images