CN104863867B - A kind of Shaft-Well Tubular Pump Unit for model test - Google Patents
A kind of Shaft-Well Tubular Pump Unit for model test Download PDFInfo
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- CN104863867B CN104863867B CN201510272817.9A CN201510272817A CN104863867B CN 104863867 B CN104863867 B CN 104863867B CN 201510272817 A CN201510272817 A CN 201510272817A CN 104863867 B CN104863867 B CN 104863867B
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Abstract
The invention discloses a kind of Shaft-Well Tubular Pump Unit for model test, belong to hydraulic engineering pumping plant technical field.Described pump-unit model adopts minor axis transmission system; Torsionmeter, belt pulley and belt pulley seat are set in the vertical shaft of described pump-unit; The drive motor of model pump is arranged on the top of described vertical shaft, and it is connected with the belt pulley in described vertical shaft by belt; Water inlet flow channel section is divided into vertical shaft section and round platform section from structure, manages orchid between two sections, the thrust metal of model pump pump shaft is installed on the flange of round platform section side; Described round platform section, model pump blade wheel chamber and model pump diffuser composition model pump assembly, two fulcrums of model pump pump shaft are all in this assembly.Novel silo formula tubular pump model provided by the invention have pump shaft short, high, the axle system of concentricity be installed operate stable advantage, test data is stable, reproducible, for the hydraulic characteristic accurately studying Shaft-Well Tubular Pump Unit provides necessary condition.
Description
Technical field
The invention belongs to hydraulic engineering pumping plant technical field, be specifically related to a kind of Shaft-Well Tubular Pump Unit for model test, be applied to the hydraulic characteristic by the large-scale Shaft-Well Tubular Pump Unit of the technique study of model test.
Background technique
Large-scale Shaft-Well Tubular Pump Unit has the advantages such as hydraulic performance excellence, installation and repairing is more convenient, construction investment is less, in the last few years, more and more applied at the large-scale low-lift-head pumping station in the fields such as Water Resources Allocation, agricultural drainage and irrigation, water environment treatment and Urban Waterlogging.For researching and solving Problems existing in large-scale low-lift-head pumping station Shaft-Well Tubular Pump Unit the Hydraulic Design, fully improving its hydraulic performance, need further investigate it by means of the method for model test.The existing Shaft-Well Tubular Pump Unit for model test adopts long axis transmission system; The inlet water tank of test stand is connected with short water tank by left and right two bifurcated pipes, and short water tank is connected with water inlet flow channel import, and when carrying out model test, current are divided into two strands from inlet water tank, flow into short water tank by bifurcated pipe, then flow into water inlet flow channel and model pump; In space after the drive motor of described model pump device, the equipment such as torsionmeter and bearing support are arranged in inlet water tank successively, before short water tank and between two bifurcated pipes; The pump shaft of model pump by model pump blade wheel chamber through whole water inlet flow channel and short water tank, one, its fulcrum in model pump diffuser, on another bearing then before short water tank; Bearing support before described model pump and described short water tank is separately fixed on the basis of test stand, the concentricity of described two bearings at test stand scene by regulating the position of model pump and bearing support to realize respectively.Span due to model pump shaft system is large and installation concentricity is difficult to guarantee, very easily causes axle system running instability even to be vibrated, significantly impacts the stability of pump-unit performance test data.
Summary of the invention
The present invention is directed to the defect that above-mentioned existing Shaft-Well Tubular Pump Unit model exists, design and produce the Shaft-Well Tubular Pump Unit model adopting minor axis system, to ensure installation precision and the operation stability of model pump pump shaft.For Shaft-Well Tubular Pump Unit, the Shaft-Well Tubular Pump Unit model that the present invention is used for model test comprises water inlet flow channel section, model pump and outlet passage section 3 parts, it is characterized in that, described pump-unit model adopts minor axis transmission system; Be arranged in the vertical shaft of this model by the thrust-bearing of described pump-unit model and torsionmeter, the drive motor of model pump is arranged on the top of described vertical shaft; Water inlet flow channel section is divided into vertical shaft section and round platform section from structure, manages orchid between two sections, the thrust metal of model pump pump shaft is installed on the flange of round platform section side; Described round platform section, model pump impeller and blade wheel chamber, model pump diffuser composition model pump assembly, two fulcrums of model pump pump shaft are all in this model pump assembly.Novel silo formula tubular pump model provided by the invention, have pump shaft short, high, the axle system of concentricity be installed operate stable advantage, the data stabilization, reproducible of pump-unit model hydraulic characteristic test, for accurate research and the hydraulic characteristic of effectively improving Shaft-Well Tubular Pump Unit provide necessary condition.
For realizing object of the present invention, adopt following technological scheme:
1. adopt minor axis transmission system, make full use of the vertical shaft in described pump-unit model, arrange the thrust-bearing and bearing support, the torsionmeter of test model pump pump shaft moment of torsion and the equipment such as the belt pulley of transmission drive motor power and belt pulley seat that bear model pump pump shaft axial force;
2. by the restriction of described pump-unit model vertical shaft size, the drive motor of model pump can not be arranged in vertical shaft, therefore belt pulley seat is set in described vertical shaft, drive motor is arranged in the top of vertical shaft, the belt pulley of motor shaft end is connected by belt with the belt pulley in vertical shaft;
3. described water inlet flow channel section is divided into vertical shaft section and round platform section from structure, both are the Flange joint of straight flange round by section configuration; These two sections of separating surfaces are positioned at the rear portion of described vertical shaft, and the current of this section flow through from the both sides of vertical shaft, therefore the centre of described flange is the vertical elongate steel plate of passing through mutually with circle; The described elongate steel plate of round platform section in the middle part of vertical shaft section one side flange arranges thrust-bearing and bearing support, bears the axial force that pump shaft transmits;
4. described in, round platform section is connected with model pump blade wheel chamber by flange, and the latter is connected with model pump diffuser by flange, and three connects rear composition model pump assembly; On the flange that one, the fulcrum of model pump pump shaft is connected with described vertical shaft section in round platform section, another is then in the diffuser of model pump, both are all in described model pump assembly, and this structure is convenient to complete in model pump manufactory the work such as the Installation and adjustment of model pump;
6. open near elongate steel plate center described in the straight flange round flange of round platform section side the hole that is greater than described thrust metal external diameter in vertical shaft section, make it can pass from this hole after vertical shaft section is connected with model pump assembly;
7. for ease of comparing the pump-unit hydraulic performance of the different model pump of employing, by the flow deflecting cone before model pump impeller hub body with vertical shaft end for boundary is divided into standing part and active part, adopt between the two and be threaded, wherein, the shape line of active part can design according to adopted model pump hub body diameter, to realize and being smoothly connected of different-diameter hub body;
8. described in, water inlet flow channel vertical shaft section, model pump assembly and outlet passage section can separately be transported, and connect successively, and be fixed on test stand by respective basis at methods of pump set model tests platform flange.
The object of the invention is to be achieved through the following technical solutions, for a Shaft-Well Tubular Pump Unit for model test, the water inlet flow channel vertical shaft section comprising drive motor and set gradually along water (flow) direction, water inlet flow channel round platform section, model pump impeller and blade wheel chamber, model pump diffuser, outlet passage section;
Water inlet flow channel vertical shaft section, water inlet flow channel round platform section, model pump blade wheel chamber, model pump diffuser, outlet passage are connected successively by flange, wherein, and water inlet flow channel round platform section, model pump blade wheel chamber, model pump diffuser composition model pump assembly;
Described pump-unit adopts minor axis transmission system, arrange successively in described water inlet flow channel vertical shaft section the thrust-bearing bearing model pump pump shaft axial force and bearing support, test model pump pump shaft moment of torsion torsionmeter and transmit belt pulley and the belt pulley seat of drive motor power;
Described belt pulley seat is fixed on described water inlet flow channel vertical shaft segment base plinth, arranges ball bearing and bearing support respectively, arrange belt pulley and belt pulley axle between bearings at both ends at belt pulley seat two ends;
Described torsionmeter is fixed on described water inlet flow channel vertical shaft segment base plinth, and torsionmeter input end is connected with described belt pulley axle by coupling, and torsionmeter output terminal is connected with described model pump pump shaft by coupling;
Described thrust-bearing and bearing support are arranged on water inlet flow channel round platform section on the flange of water inlet flow channel vertical shaft section side, for bearing the axial force that pump shaft transmits; On the flange that one, the fulcrum of model pump pump shaft is connected with described water inlet flow channel vertical shaft section in water inlet flow channel round platform section, another is then in model pump diffuser, and two fulcrums of model pump pump shaft are all in described model pump assembly;
The drive motor of described model pump is arranged on the top of described water inlet flow channel vertical shaft section, and the belt pulley of drive motor motor shaft end is connected by belt with the belt pulley in described water inlet flow channel vertical shaft section.
Preferably, the section configuration of the flange between described water inlet flow channel vertical shaft section and water inlet flow channel round platform section is straight flange round, the current of this section flow through from vertical shaft both sides, the centre of section is the vertical elongate steel plate of passing through mutually with circle, and the height of elongate steel plate and width are respectively water inlet flow channel height and the shaft width of described flange place section; Be circular in the middle part of described elongate steel plate, its diameter is the diameter of the flow deflecting cone of described flange place section; Described water inlet flow channel round platform section arranges thrust-bearing and thrust metal in the elongate steel plate of the flange of water inlet flow channel vertical shaft section side; Described water inlet flow channel vertical shaft section opens near the center of the elongate steel plate of the flange of water inlet flow channel round platform section side the hole that is greater than described thrust metal external diameter, and thrust metal can be passed after water inlet flow channel vertical shaft section is connected with model pump assembly from this hole.
Preferably, welds after the processing of the flange of described water inlet flow channel vertical shaft section side with the Outlet Section of water inlet flow channel vertical shaft section, the flange of water inlet flow channel round platform section side and water inlet flow channel round platform section connect together overall processing.
Preferably, the flow deflecting cone before described model pump impeller hub body is with the end of described water inlet flow channel vertical shaft section for boundary is divided into standing part and active part, and both are threaded in employing; The shape line of active part can design according to the diameter of adopted model pump impeller hub body, to realize being smoothly connected of flow deflecting cone and different-diameter hub body; In the inside of flow deflecting cone active part, mechanical seal is set.
The object of the present invention is achieved like this:
1. for the Shaft-Well Tubular Pump Unit model of model test, adopt minor axis transmission system, it comprises water inlet flow channel vertical shaft section, water inlet flow channel round platform section, model pump impeller and blade wheel chamber, model pump diffuser, outlet passage section, thrust-bearing and bearing support, torsionmeter, belt pulley and belt pulley seat, drive motor etc.;
2. described water inlet flow channel section is divided into vertical shaft section and round platform section from structure, both are by straight flange round Flange joint, welds with vertical shaft section Outlet Section after the straight flange round flange processing of vertical shaft section side, the straight flange round flange of round platform section side and round platform section connect together overall processing;
3. described in, the both sides of straight flange round section of flange were water channel, middle is the vertical elongate steel plate of passing through mutually with circle, the height of described long strip and width are respectively the height of water inlet flow channel and the width of vertical shaft of described flange place section, described circle is positioned in the middle part of described long strip, and its diameter is the diameter of the flow deflecting cone of described flange place section;
4. in elongate steel plate described in vertical shaft section one side flange, arrange thrust-bearing and bearing support in round platform section, model pump pump shaft from then on bearing passes through;
5. described in, round platform section is connected with model pump blade wheel chamber by flange, and the latter is connected with model pump diffuser by flange again, and three connects rear composition model pump assembly; On the flange that one, the fulcrum of model pump pump shaft is connected with described vertical shaft section in round platform section, another is then in the diffuser of model pump;
6. torsionmeter described in is arranged in described vertical shaft, and at described thrust-bearing and between bearing support and belt pulley seat, its output terminal is connected with described model pump pump shaft by coupling, and its base is fixed on vertical shaft segment base plinth;
7. belt pulley seat described in is arranged in described vertical shaft, and its base is fixed on described vertical shaft segment base plinth, arranges ball bearing and bearing support at belt pulley seat two ends; Arrange belt pulley axle and belt pulley between bearings at both ends, one end of this axle is connected by the coupling of coupling with described torsionmeter input end;
8. described in, the drive motor of model pump is arranged on the top of vertical shaft section, and drive motor axle installs belt pulley, and it is connected with the described belt pulley be located in vertical shaft by belt;
9. in elongate steel plate described in the straight flange round flange of described vertical shaft section near described round platform section side, open the hole that one is greater than described thrust metal external diameter, this bearing support can be passed after vertical shaft section is connected with model pump assembly from this hole, enter described vertical shaft;
10. by the flow deflecting cone before described model pump impeller hub body with the end of described vertical shaft for boundary is divided into standing part and active part, both are threaded in employing; The shape line of active part can design according to the diameter of adopted model pump impeller hub body, to realize being smoothly connected of itself and different-diameter hub body; In the inside of active part, mechanical seal is set;
Described pump-unit model is divided into three sections from structure by 11.: water inlet flow channel vertical shaft section, model pump assembly and outlet passage section, can separately transport, each section has it independently basic, at methods of pump set model tests platform Flange joint, and is fixed on test stand by respective basis.
Compared with the conventional method, the present invention has following beneficial effect:
First, the present invention has axle system and to operate stable outstanding advantages, be applied to Shaft-Well Tubular Pump Unit hydraulic characteristic model test, test data is stable, test result is reproducible, for accurately, the hydraulic characteristic tool of in depth studying large pumping station Shaft-Well Tubular Pump Unit is of great significance.
The second, apply Shaft-Well Tubular Pump Unit model of the present invention, can complete assembling and the adjustment of model pump assembly in model pump manufactory, shafting installation precision is fully guaranteed.
3rd, Shaft-Well Tubular Pump Unit model of the present invention is made up of separate water inlet flow channel vertical shaft section, model pump assembly and outlet passage section, is convenient to transport and carries out Installation and Debugging at methods of pump set model tests platform.
4th, the water guide cone active part of Shaft-Well Tubular Pump Unit model of the present invention can be changed easily according to the diameter of different model pump hub body, is convenient to the pump-unit hydraulic performance carried out when adopting different model pump and compares.
Accompanying drawing explanation
Fig. 1 a is the facade structures schematic diagram of Shaft-Well Tubular Pump Unit model of the present invention.
Fig. 1 b is the plane structure schematic diagram of Shaft-Well Tubular Pump Unit model of the present invention.
Fig. 2 is Shaft-Well Tubular Pump Unit model straight flange round section of flange schematic diagram of the present invention.
In figure: 1 water inlet flow channel vertical shaft section, 2 water inlet flow channel round platform sections, 3 model pump impeller and blade wheel chamber, 4 model pump diffusers, 5 outlet passage sections, 6 thrust-bearings and bearing support, 7 torsionmeters, 8 belt pulley seats, 9 belt pulleys, 10 drive motors, 11 straight flange round flanges, 12 vertical shafts, 13 model pump pump shafts, 14 flanges, 16 coupling, 17 torsionmeter bases, 18 vertical shaft segment base plinth, 19 belt pulley seat bases, 20 ball bearings and bearing support, 21 belt pulley axles, 23 motor shaft end belt pulleys, 24 model pump impeller hub bodies, 25 flow deflecting cone standing parts, 26 flow deflecting cone active parts, 27 mechanical seals.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further details.
The object of the present invention is achieved like this:
(1) for the Shaft-Well Tubular Pump Unit model of model test, adopt minor axis transmission system, it comprises water inlet flow channel vertical shaft section 1, water inlet flow channel round platform section 2, model pump impeller and blade wheel chamber 3, model pump diffuser 4, outlet passage section 5, thrust-bearing and bearing support 6, torsionmeter 7, belt pulley seat 8, belt pulley 9, drive motor 10 etc., as shown in Figure 1 a, 1 b;
(2) water inlet flow channel section is divided into vertical shaft section 1 and round platform section 2 from structure, both are connected by straight flange round flange 11, the straight flange round flange 11 of vertical shaft section 1 side welds with the Outlet Section of vertical shaft section 1 after processing, and the straight flange round flange 11 of round platform section 2 side and round platform section 2 connect together overall processing;
(3) both sides of straight flange round flange 11 section were water channel, middle is the vertical elongate steel plate of passing through mutually with circle, as shown in Figure 2, the height of long strip and width are respectively the height of water inlet flow channel and the width of vertical shaft 12 of flange 11 place section, circle is positioned in the middle part of long strip, and its diameter is the diameter of the flow deflecting cone of flange 11 place section;
(4) in straight flange round flange 11 elongate steel plate of vertical shaft section 1 side, arrange thrust-bearing and bearing support 6 in round platform section 2, model pump pump shaft 13 from then on bearing passes through;
(5) round platform section 2 is connected with model pump blade wheel chamber 3 by flange 14, and the latter is connected with model pump diffuser 4 by flange 14, and three connects rear composition model pump assembly; On the straight flange round flange 11 that one, the fulcrum of model pump pump shaft 13 is connected with vertical shaft section 1 in round platform section 2, another is then in model pump diffuser 4;
(6) torsionmeter 7 is arranged in vertical shaft 12, and at thrust-bearing and between bearing support 6 and belt pulley seat 8, its output terminal is connected with model pump pump shaft 13 by coupling 16, and its base 17 is fixed on vertical shaft segment base plinth 18;
(7) belt pulley seat 8 is arranged in vertical shaft 12, and its base 19 is fixed on vertical shaft segment base plinth 18, arranges ball bearing and bearing support 20 at belt pulley seat 8 two ends; Arrange belt pulley 9 and belt pulley axle 21 between bearings at both ends, one end of this axle is connected with torsionmeter 7 input end by coupling 16;
(8) drive motor 10 of model pump is arranged on the top of vertical shaft section 1, and install belt pulley 23 in one end of drive motor axle, it is connected with the belt pulley 9 be located in vertical shaft 12 by belt;
(9) in straight flange round flange 11 elongate steel plate of round platform section 2 side, open the hole that one is greater than thrust metal 6 external diameter in vertical shaft section 1, this bearing support 6 can be passed after vertical shaft section 1 is connected with model pump assembly from this hole, enter vertical shaft 12;
(10) by the flow deflecting cone before model pump impeller hub body 24 with the end of vertical shaft 12 for boundary is divided into standing part 25 and active part 26, both are threaded in employing; The shape line of active part 26 can design according to the diameter of adopted model pump impeller hub body 24, to realize being smoothly connected of flow deflecting cone and different-diameter hub body 24; In the inside of active part 26, mechanical seal 27 is set;
(11) pump-unit model is divided into three sections from structure: water inlet flow channel vertical shaft section 1, model pump assembly and outlet passage section 5, can separately transport, each section has it independently basic, at methods of pump set model tests platform Flange joint, and is fixed on test stand by respective basis.
Claims (4)
1. the Shaft-Well Tubular Pump Unit for model test, the water inlet flow channel vertical shaft section (1) comprising drive motor (10) and arrange along water (flow) direction, water inlet flow channel round platform section (2), model pump impeller and blade wheel chamber (3), model pump diffuser (4), outlet passage section (5), it is characterized in that
Water inlet flow channel vertical shaft section (1), water inlet flow channel round platform section (2), model pump impeller and blade wheel chamber (3), model pump diffuser (4), outlet passage section (5) are connected successively by flange (11,14), wherein, water inlet flow channel round platform section (2), model pump impeller and blade wheel chamber (3), model pump diffuser (4) composition model pump assembly;
Described pump-unit adopts minor axis transmission system, arranges the thrust-bearing bearing model pump pump shaft axial force and thrust metal (6), the torsionmeter (7) of test model pump pump shaft moment of torsion and the belt pulley (9) of transmission drive motor power and belt pulley seat (8) in described water inlet flow channel vertical shaft section successively;
Described belt pulley seat (8) is fixed on described water inlet flow channel vertical shaft segment base plinth (18), arranges ball bearing and bearing support (20) at belt pulley seat (8) two ends respectively, arranges belt pulley (9) and belt pulley axle (21) between bearings at both ends;
Described torsionmeter (7) is fixed on described water inlet flow channel vertical shaft section (1) basis, torsionmeter (7) input end is connected with described belt pulley axle (21) by coupling (16), and torsionmeter (7) output terminal is connected with described model pump pump shaft (13) by coupling (16);
Described thrust-bearing and thrust metal (6) are arranged on water inlet flow channel round platform section (2) on the flange (11) of water inlet flow channel vertical shaft section (1) side, for bearing the axial force that pump shaft transmits; On the flange (11) that one, the fulcrum of model pump pump shaft (13) is connected with described water inlet flow channel vertical shaft section (1) in water inlet flow channel round platform section (2), another is then in model pump diffuser (4), and two fulcrums of model pump pump shaft (13) are all in described model pump assembly;
The drive motor (10) of described model pump is arranged on the top of described water inlet flow channel vertical shaft section (1), and the belt pulley (23) of drive motor (10) motor shaft end is connected by belt with the belt pulley (9) in described water inlet flow channel vertical shaft section (1).
2. the Shaft-Well Tubular Pump Unit for model test according to claim 1, it is characterized in that, the section configuration of the flange (11) between described water inlet flow channel vertical shaft section (1) and water inlet flow channel round platform section (2) is straight flange round, the current of this section flow through from vertical shaft both sides, the centre of section is the vertical elongate steel plate of passing through mutually with circle, and the height of elongate steel plate and width are respectively water inlet flow channel height and the shaft width of flange (11) place section between described water inlet flow channel vertical shaft section (1) and water inlet flow channel round platform section (2); Be circular in the middle part of described elongate steel plate, its diameter is the diameter of the flow deflecting cone of flange (11) place section between described water inlet flow channel vertical shaft section (1) and water inlet flow channel round platform section (2); Described water inlet flow channel round platform section (2) arranges thrust-bearing and thrust metal (6) in the elongate steel plate of the flange (11) of water inlet flow channel vertical shaft section (1) side; Described water inlet flow channel vertical shaft section (1) opens near the center of the elongate steel plate of the flange (11) of water inlet flow channel round platform section (2) side the hole that is greater than described thrust-bearing and thrust metal (6) external diameter, and thrust-bearing and thrust metal (6) can be passed after water inlet flow channel vertical shaft section (1) is connected with model pump assembly from this hole.
3. the Shaft-Well Tubular Pump Unit for model test according to claim 1, it is characterized in that, welds with the Outlet Section of water inlet flow channel vertical shaft section (1) after flange (11) processing of described water inlet flow channel vertical shaft section (1) side, the flange (11) of water inlet flow channel round platform section (2) side and water inlet flow channel round platform section (2) connect together overall processing.
4. the Shaft-Well Tubular Pump Unit for model test according to claim 1, it is characterized in that, flow deflecting cone before the hub body (24) of described model pump impeller is that boundary is divided into standing part (25) and active part (26) with the end of described water inlet flow channel vertical shaft section (1), and both are threaded in employing; The shape line of active part (26) can design according to the diameter of the hub body (24) of adopted model pump impeller, to realize being smoothly connected of flow deflecting cone and different-diameter hub body; In the inside of flow deflecting cone active part (26), mechanical seal (27) is set.
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Families Citing this family (4)
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| CN107091235B (en) * | 2017-05-25 | 2019-01-04 | 扬州大学 | A kind of devices and methods therefor improving reversible axial flow pump hydraulic characteristic(s) using dynamic guide vane |
| CN110459118A (en) * | 2019-07-12 | 2019-11-15 | 国核工程有限公司 | Wet process winding pumps model and wet process winding pump pre-installation analogy method |
| CN112855553B (en) * | 2021-01-12 | 2022-06-21 | 扬州大学 | Novel sectional assembly type shaft tubular pump device |
| CN114738296B (en) * | 2022-05-10 | 2024-07-12 | 江苏大学 | High-precision bulb tubular pump model test device and test method |
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