Gas-bearing working condition hydraulic turbine performance testing device

Abstract

The application provides a kind of gas-containing working condition hydraulic turbine performance test equipment, comprising: mixing tank;Gas tank, its gas outlet is communicated with the inlet of mixing tank by gas conveying pipe, and gas conveying pump, gas flow meter and first valve are installed on gas conveying pipe;Water storage tank, its water outlet is communicated with the inlet of mixing tank by water conveying pipe, and water conveying pump and second valve are installed on water conveying pipe;Supporting box;Hydraulic turbine is arranged in supporting box, its liquid inlet is communicated with the outlet of mixing tank by liquid outlet pipe, and liquid pumping pump is installed on liquid outlet pipe;Dynamometer;Sliding tube, its first end penetrates supporting box, and is connected with the rotor of hydraulic turbine, its second end is connected with the rotating shaft of dynamometer;Amplitude detection component is connected with the inner wall of supporting box, and is sleeved with sliding tube, for monitoring the amplitude of the rotor of hydraulic turbine.The application can comprehensively test the stability of hydraulic turbine under different gas-containing working conditions by comprehensively recovering energy efficiency test results and the amplitude monitoring results of rotor.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hydraulic turbine testing, and particularly relates to a hydraulic turbine performance testing device for gas-containing working conditions. BACKGROUND

[0002] The medium has a pressure attenuation process in the hydraulic turbine, and for the gas-containing medium, gas will be separated out during the pressure attenuation process. The more the pressure attenuation, the more the gas separation, and too much gas separation will lead to unstable medium flow in the impeller flow passage, vortex formation, and problems such as increased hydraulic loss of the hydraulic turbine, low energy recovery efficiency, and increased rotor vibration amplitude. In the prior art, a dynamometer is generally used to test the energy recovery efficiency of the hydraulic turbine, but the rotor vibration amplitude of the hydraulic turbine under the gas-containing working condition is not tested, so the stability of the hydraulic turbine under the gas-containing working condition cannot be comprehensively tested. SUMMARY

[0003] Therefore, the present application provides a hydraulic turbine performance testing device for gas-containing working conditions, which tests the energy recovery efficiency of the hydraulic turbine through a dynamometer, tests the rotor vibration amplitude of the hydraulic turbine through an amplitude detection assembly, and comprehensively tests the stability of the hydraulic turbine under the gas-containing working condition in combination with the energy recovery efficiency and the rotor vibration amplitude.

[0004] The hydraulic turbine performance testing device for gas-containing working conditions provided by the present application comprises:

[0005] a mixing tank;

[0006] a gas tank, a gas outlet of the gas tank being communicated with an inlet of the mixing tank through a gas conveying pipe, a gas conveying pump, a gas flow meter, and a first valve being installed on the gas conveying pipe;

[0007] a water storage tank, a water outlet of the water storage tank being communicated with the inlet of the mixing tank through a water conveying pipe, a water conveying pump and a second valve being installed on the water conveying pipe;

[0008] a support tank;

[0009] a hydraulic turbine, the hydraulic turbine being arranged in the support tank, a liquid inlet of the hydraulic turbine being communicated with an outlet of the mixing tank through a liquid outlet pipe, and a liquid pumping pump being installed on the liquid outlet pipe;

[0010] a dynamometer;

[0011] a sliding pipe, a first end of the sliding pipe penetrating through the support tank and being connected with a rotor of the hydraulic turbine, and a second end of the sliding pipe being connected with a rotating shaft of the dynamometer;

[0012] An amplitude detection assembly is connected with the inner wall of the support box and sleeved on the sliding pipe, and is used for monitoring the amplitude of the rotor of the hydraulic turbine.

[0013] Optionally, the amplitude detection assembly comprises:

[0014] A fixing ring is fixedly connected with the inner wall of the support box, and a plurality of through holes are formed through the circumference of the fixing ring;

[0015] A plurality of first springs have first ends fixedly connected with the inner wall of the fixing ring;

[0016] A vibration ring has an outer wall fixedly connected with the second end of each first spring, and an inner wall sleeved on the sliding pipe and rotatably connected with the sliding pipe;

[0017] A plurality of sliding rods pass through the through holes and are slidably connected with the fixing ring, each sliding rod is in abutment with the vibration ring, and an outer wall of each sliding rod is fixed with a conductive strip and a resistance strip, and the conductive strip and the resistance strip are connected by a wire;

[0018] A plurality of fixing sleeves are sleeved on the sliding rods, are slidably connected with the sliding rods, and are fixedly connected with the fixing ring, and a first conductive block and a second conductive block are fixed on the inner wall of each fixing sleeve, the first conductive block is in abutment with the conductive strip, and the second conductive block is in abutment with the resistance strip;

[0019] A plurality of current sensors are used for monitoring the current value flowing through one resistance strip;

[0020] A controller has an input end in communication connection with the output end of each current sensor.

[0021] Optionally, the amplitude detection assembly further comprises:

[0022] A plurality of limiting plates are connected with one end of one sliding rod away from the vibration ring;

[0023] A plurality of second springs are sleeved on the sliding rods, and opposite ends of the second springs are fixedly connected with the limiting plates and the fixing sleeves, respectively.

[0024] Optionally, the hydraulic turbine performance test equipment for gas-containing working conditions further comprises:

[0025] A sealing pipe, a first end of the sealing pipe is sleeved with the liquid outlet pipe, the sealing pipe is movably connected with the liquid outlet pipe, a second end of the sealing pipe penetrates through the support box, the second end of the sealing pipe is movably connected with the support box, and the second end of the sealing pipe is in communication with the liquid inlet of the hydraulic turbine;

[0026] A first telescopic member, a fixed end of the first telescopic member is fixed on the support box, and a movable end of the first telescopic member is connected with the sealing pipe to drive the sealing pipe to move along the liquid outlet pipe.

[0027] Optionally, the gas-containing working condition hydraulic turbine performance test device further comprises:

[0028] A slide channel, the slide channel is arranged on an inner wall of a bottom side of the support box;

[0029] A limiting frame, the hydraulic turbine is fixed on the limiting frame;

[0030] A sliding block, the sliding block is fixedly connected with the limiting frame and is slidably connected with the slide channel.

[0031] Optionally, the gas-containing working condition hydraulic turbine performance test device further comprises a second telescopic member, a fixed end of the second telescopic member is fixed on an inner wall of the support box, and a movable end of the second telescopic member is fixedly connected with the limiting frame.

[0032] Optionally, the sliding pipe is connected with the rotor of the hydraulic turbine and the rotating shaft of the dynamometer through a key; and the sliding pipe is movably connected with the vibration ring.

[0033] Optionally, the gas-containing working condition hydraulic turbine performance test device further comprises:

[0034] A baffle, the baffle is fixedly connected with an outer wall of the support box, the outer wall of the support box being exposed from the sliding pipe;

[0035] A third spring, the third spring is sleeved on the sliding pipe, and opposite ends of the third spring are fixedly connected with the outer wall of the support box and the baffle respectively.

[0036] Optionally, the gas-containing working condition hydraulic turbine performance test device further comprises a booster pump, the booster pump is in communication with the mixing tank.

[0037] Optionally, the gas-containing working condition hydraulic turbine performance test device further comprises a pressure gauge, the pressure gauge is arranged on the mixing tank.

[0038] Compared with the prior art, the above technical scheme provided by the application has at least the following beneficial effects:

[0039] The hydraulic turbine performance test equipment for gas-containing working conditions provided by the application can be used to prepare mixed liquid with different gas concentrations in the mixing tank, test the energy recovery efficiency of the hydraulic turbine under different gas-containing working conditions by using the dynamometer, monitor the vibration amplitude change of the rotor of the hydraulic turbine under different gas-containing working conditions by using the amplitude detection assembly, and comprehensively test the stability of the hydraulic turbine under different gas-containing working conditions according to the test results of the energy recovery efficiency and the monitoring results of the rotor vibration amplitude, thereby improving the reliability of the test results of the stability of the hydraulic turbine. BRIEF DESCRIPTION OF DRAWINGS

[0040] Figure 1 A schematic view of the hydraulic turbine performance test equipment for gas-containing working conditions according to an embodiment of the application;

[0041] Figure 2 A schematic view of the hydraulic turbine performance test equipment for gas-containing working conditions according to an embodiment of the application; Figure 1 An enlarged view of position A of the hydraulic turbine performance test equipment for gas-containing working conditions according to an embodiment of the application;

[0042] Figure 3 An enlarged view of position A of the hydraulic turbine performance test equipment for gas-containing working conditions according to an embodiment of the application; Figure 1 A schematic view of the amplitude detection assembly of the hydraulic turbine performance test equipment for gas-containing working conditions according to an embodiment of the application;

[0043] Figure 4 An enlarged view of position B of the amplitude detection assembly according to an embodiment of the application; Figure 3 An enlarged view of position B of the amplitude detection assembly according to an embodiment of the application;

[0044] Figure 5 An internal structure side view of the support box of the hydraulic turbine performance test equipment for gas-containing working conditions according to an embodiment of the application. Figure 1 REFERENCE SIGNS

[0045] 1: mixing tank; 2: gas tank; 3: water storage tank; 4: support box; 5: hydraulic turbine; 6: dynamometer; 7: sliding pipe; 8: amplitude detection assembly; 801: fixed ring; 802: first spring; 803: vibration ring; 804: sliding rod; 805: fixed sleeve; 806: conductive strip; 807: resistance strip; 808: first conductive block; 809: second conductive block; 810: pre-connected wire; 811: limiting plate; 812: second spring; 9: gas conveying pipe; 10: gas conveying pump; 11: gas flow meter; 12: first valve; 13: water conveying pipe; 14: water conveying pump; 15: second valve; 16: liquid outlet pipe; 17: liquid pumping pump; 18: sealing pipe; 19: first telescopic member; 20: sliding channel; 21: limiting frame; 22: sliding block; 23: second telescopic member; 24: connecting key; 25: baffle; 26: third spring; 27: booster pump; 28: pressure gauge; 29: mixing pipe; 30: test table.

[0046] DETAILED DESCRIPTION

[0047] ​Embodiments of the present application will be further described below with reference to the drawings. In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the orientation or positional relationship shown in the drawings, and are merely for the convenience of the simplified description of the present application, and do not indicate or imply that the device or component referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions.

[0048] Figure 1 A schematic diagram of a gas-containing working condition hydraulic turbine performance test device according to an embodiment of the present application; Figure 2 A schematic diagram of a gas-containing working condition hydraulic turbine performance test device according to an embodiment of the present application; Figure 1 An enlarged view of position A of the gas-containing working condition hydraulic turbine performance test device shown in Figure 1 , Figure 2 As shown in the drawings, the gas-containing working condition hydraulic turbine performance test device includes a mixing tank 1, a gas tank 2, a water storage tank 3, a support tank 4, a hydraulic turbine 5, a dynamometer 6, a sliding pipe 7, and an amplitude detection assembly 8.

[0049] The gas outlet of the gas tank 2 is communicated with the inlet of the mixing tank 1 through a gas conveying pipe 9, and a gas conveying pump 10, a gas flow meter 11, and a first valve 12 are installed on the gas conveying pipe 9; the water outlet of the water storage tank 3 is communicated with the inlet of the mixing tank 1 through a water conveying pipe 13, and a water conveying pump 14 and a second valve 15 are installed on the water conveying pipe 13; the hydraulic turbine 5 is arranged in the support tank 4, the liquid inlet of the hydraulic turbine 5 is communicated with the outlet of the mixing tank 1 through a liquid outlet pipe 16, and a liquid pumping pump 17 is installed on the liquid outlet pipe 16; the first end of the sliding pipe 7 penetrates through the support tank 4 and is connected with the rotor of the hydraulic turbine 5, and the second end of the sliding pipe 7 is connected with the rotating shaft of the dynamometer 6; the amplitude detection assembly 8 is connected with the inner wall of the support tank 4 and is sleeved on the sliding pipe 7, and is used for monitoring the amplitude of the rotor of the hydraulic turbine 5.

[0050] In use, the second valve 15 and the water pump 14 are opened, a certain amount of water in the water storage tank 3 is sent to the mixing tank 1 through the water pipe 13, the first valve 12 and the gas pump 10 are opened, the gas in the gas tank 2 is sent to the mixing tank 1 through the gas pipe 9, and the gas flow to the mixing tank 1 is monitored by the gas flow meter 11, so as to prepare mixed liquid with different gas concentrations in the mixing tank 1. The second valve 15, the water pump 14, the first valve 12 and the gas pump 10 are closed, and when the gas in the mixing tank 1 is fully dissolved in water, the liquid pump 17 is started to extract the mixed liquid in the mixing tank 1 to the liquid turbine 5 through the liquid outlet pipe 16, so as to drive the impeller in the liquid turbine 5 to rotate, and the rotation of the impeller further drives the rotor of the liquid turbine 5 to rotate, and the rotation of the rotor drives the sliding pipe 7 connected thereto to rotate, and finally drives the dynamometer 6 connected with the sliding pipe 7 to rotate, so that the dynamometer 6 measures the energy recovery efficiency of the liquid turbine 5. At the same time, the rotor of the liquid turbine 5 is affected by the extracted gas and vibrates to different degrees, and the amplitude detection assembly 8 monitors the amplitude of the rotor of the liquid turbine 5, so that the liquid turbine performance test equipment for gas-containing working conditions can simultaneously obtain the energy recovery efficiency of the liquid turbine 5 and the amplitude of the rotor of the liquid turbine 5, and can comprehensively test the stability of the liquid turbine 5 under the gas-containing working condition, and the evaluation result of the stability of the liquid turbine 5 is more reliable.

[0051] The liquid turbine performance test equipment for gas-containing working conditions is used to prepare mixed liquid with different gas concentrations in the mixing tank 1, test the energy recovery efficiency of the liquid turbine 5 under different gas-containing working conditions by using the dynamometer 6, monitor the vibration amplitude change of the rotor of the liquid turbine 5 under different gas-containing working conditions by using the amplitude detection assembly 8, and comprehensively test the stability of the liquid turbine under different gas-containing working conditions by comprehensively testing the energy recovery efficiency and the rotor amplitude monitoring result, so as to improve the reliability of the stability test result of the liquid turbine.

[0052] In this embodiment, in order to improve the integration of the equipment, a test table 30 is additionally arranged, as shown in Figure 1 The test table 30 is internally provided with a containing cavity, and a plurality of supporting feet are connected to the bottom end. The gas tank 2 and the water storage tank 3 are arranged inside the test table 30, and the mixing tank 1, the liquid turbine 5 and the dynamometer 6 are arranged on the top of the test table 30. Figure 1As shown, the gas inlet of the gas tank 2 is located at its top end, and is connected to a gas source to input gas into the gas tank 2, and the gas outlet of the gas tank 2 is located at its bottom end and is connected to the gas conveying pipe 9, which is sequentially provided with the gas conveying pump 10, the gas flow meter 11 and the first valve 12 in the direction extending towards the mixing tank 1. In this embodiment, the gas stored in the gas tank 2 is carbon dioxide. The water inlet of the water storage tank 3 is located at its top end, and is connected to a water source to input water flow into the water storage tank 3, and the water outlet of the water storage tank 3 is located at its bottom end and is connected to the water conveying pipe 13, which is sequentially provided with the water conveying pump 14 and the second valve 15 in the direction extending towards the mixing tank 1. Figure 1 Inside the test bench 30, a three-way valve is connected between the upper end of the gas conveying pipe 9 and the upper end of the water conveying pipe 13, the water outlet of the three-way valve is connected to the mixing pipe 29 which penetrates through the test bench 30 and is connected to the inlet of the mixing tank 1. The inlet of the mixing tank 1 is located at its upper end, the outlet of the mixing tank 1 is located at its lower end and is connected to the liquid inlet of the hydraulic turbine 5 through the liquid outlet pipe 16, the liquid outlet pipe 16 is provided with the liquid pumping pump 17 for pumping the mixed liquid containing dissolved gas in the mixing tank 1 to the hydraulic turbine 5. In order to facilitate observation, the support box 4 is provided as a hollow cuboid frame without blocking the front and rear sides, the hydraulic turbine 5 is placed in the support box 4, and the dynamometer 6 is provided outside the support box 4 and corresponds to the hydraulic turbine 5, so that the opposite ends of the sliding pipe 7 can be connected to the rotor of the hydraulic turbine 5 and the rotating shaft of the dynamometer 6, thereby transmitting the kinetic energy of the rotor of the hydraulic turbine 5 to the rotating shaft of the dynamometer 6, so that the dynamometer 6 can smoothly test the energy recovery efficiency of the hydraulic turbine 5. As shown in Figure 1 、 Figure 2 As shown, the amplitude detection assembly 8 is arranged on the right inner wall of the support box 4 and is sleeved on the sliding pipe 7, so that when the rotor of the hydraulic turbine 5 vibrates under the action of the mixed liquid containing gas, the vibration of the rotor drives the sliding pipe 7 connected thereto to vibrate at the same amplitude, and then the vibration is transmitted to the amplitude detection assembly 8, so that the amplitude detection assembly 8 detects the vibration amplitude of the rotor. In this embodiment, the first valve 12 and the second valve 15 are both provided as electromagnetic control valves, so as to more accurately control the opening and closing time of the valves. According to actual application conditions, the first valve 12 and the second valve 15 can be provided as other arbitrary specifications and models that meet the opening and closing conditions, or the test bench 30 can not be provided, as long as the connection relationship between the components is correct, the amplitude detection assembly 8 can be in any structural combination form, as long as it can monitor the vibration amplitude of the sliding pipe 7 sleeved thereon, that is, it can monitor the vibration amplitude of the rotor of the hydraulic turbine 5, and the gas tank 2 can store any gas suitable for the test conditions.

[0053] Figure 3 For Figure 1 The schematic view of the amplitude detection assembly 8 of the performance test equipment of the gas-bearing working condition hydraulic turbine 5 is shown in FIG. 8. Figure 4 For Figure 3 The enlarged view of B of the amplitude detection assembly 8 is shown in FIG. 9. As shown in Figure 3 、 Figure 4 Optionally, the amplitude detection assembly 8 comprises a fixed ring 801, a plurality of first springs 802, a vibrating ring 803, a plurality of sliding rods 804, a plurality of fixed sleeves 805, a plurality of current sensors (not shown) and a controller (not shown). The fixed ring 801 is fixedly connected with the inner wall of the support box 4, and a plurality of through holes are formed through the circumference of the fixed ring 801; the first ends of the plurality of first springs 802 are fixedly connected with the inner wall of the fixed ring 801; the outer wall of the vibrating ring 803 is fixedly connected with the second ends of the plurality of first springs 802, the inner wall of the vibrating ring 803 is sleeved with the sliding pipe 7, and the vibrating ring 803 is rotatably connected with the sliding pipe 7; one of the sliding rods 804 passes through one of the through holes and is slidably connected with the fixed ring 801, each of the sliding rods 804 abuts against the vibrating ring 803, and the outer wall of each of the sliding rods 804 is fixedly provided with a conductive strip 806 and a resistance strip 807, and the conductive strip 806 and the resistance strip 807 are connected through wires; one of the fixed sleeves 805 is sleeved with one of the sliding rods 804, is slidably connected with the sliding rod 804, and is fixedly connected with the fixed ring 801, and the inner wall of each of the fixed sleeves 805 is fixedly provided with a first conductive block 808 and a second conductive block 809, the first conductive block 808 abuts against the conductive strip 806, and the second conductive block 809 abuts against the resistance strip 807; one of the current sensors monitors the current value flowing through one of the resistance strips 807; and the input end of the controller is in communication connection with the output end of each of the current sensors. With such a structure, the structure of the amplitude detection assembly 8 is simplified, and the installation and operation are facilitated.

[0054] In the embodiment, as Figure 3As shown, the fixed ring 801 and the vibration ring 803 are concentric rings, the side wall of the fixed ring 801 is fixed to the inner wall of the support box 4, four first springs 802 are uniformly fixed between the inner wall of the fixed ring 801 and the outer wall of the vibration ring 803 in the circumferential direction, the vibration ring 803 is sleeved on the sliding pipe 7, so that the sliding pipe 7 can rotate relative to the vibration ring 803 under the action of the rotor of the hydraulic turbine 5, and can drive the vibration ring 803 to vibrate synchronously while vibrating with the rotor. The sliding rod 804 is a cylindrical rod as a whole, penetrates through the through hole formed in the fixed ring 801, the lower end is provided as a circular arc surface and abuts against the vibration ring 803, and the upper end is exposed out of the fixed ring 801, the surface of each sliding rod 804 is fixed with the conductive strip 806 and the resistance strip 807, and the conductive strip 806 and the resistance strip 807 are electrically connected through wires. Figure 3 、 Figure 4As shown, each of the sliding rods 804 is sleeved with a fixed sleeve 805 fixed to the fixed ring 801 at the outer wall of the fixed ring 801, the inner wall of the fixed sleeve 805 is fixed with the first conductive block 808 and the second conductive block 809, the first conductive block 808 abuts against the conductive strip 806, the second conductive block 809 abuts against the resistance strip 807, the first conductive block 808 and the second conductive block 809 are respectively connected with pre-connected wires 810, and the two pre-connected wires 810 are respectively used for connecting external power supply. When the pre-connected wires 810 are connected with external power supply, an electric current loop is formed between the pre-connected wires 810, the first conductive block 808, the conductive strip 806, the resistance strip 807 and the second conductive block 809, and each of the electric current sensors can monitor the current value flowing through the resistance strip 807. When the rotor of the hydraulic turbine 5 vibrates under the action of the gas-containing mixed liquid, and further drives the sliding pipe 7 and the vibration ring 803 to vibrate, the vibration ring 803 drives the sliding rods 804 in the vibration direction to move in the through hole, the sliding rods 804 drive the conductive strip 806 and the resistance strip 807 fixed thereon to move, the resistance strip 807 moves relative to the second conductive block 809, the resistance value in the electric current loop changes, the current value in the electric current loop monitored by the electric current sensor changes, the electric current sensor transmits the monitored current value to the controller in real time, the controller can calculate the change of the resistance in the electric current loop according to the change of the current value, and further can obtain the moving distance of the resistance strip 807. The moving distance of the resistance strip 807 is also the distance that the sliding rod 804 is pushed out by the vibration ring 803, that is, corresponds to the vibration amplitude of the rotor of the hydraulic turbine 5. According to the change of the current value flowing through each of the resistance strips 807 monitored by each of the electric current sensors, the controller converts each of the current value changes into the amplitude of the rotor of the hydraulic turbine 5, and selects the maximum amplitude value as the amplitude value of the rotor under the gas concentration condition. After the vibration ring 803 vibrates, it returns to the initial position under the elastic force of the first spring 802. The control logic of the rotor amplitude obtained by the controller according to the change of the current value can be realized according to the existing mature algorithm, and the specific working principle is not described here. In this embodiment, four through holes are uniformly arranged on the circumferential direction of the fixed ring 801, and correspondingly, four sliding rods 804 are arranged, and the bottom end of the resistance strip 807 is electrically connected with the conductive strip 806 through a wire. According to the actual application, the number and specific arrangement position of the through holes arranged on the fixed ring 801 can be adjusted, correspondingly, the number of the sliding rods 804 is adjusted, the position of the resistance strip 807 and the conductive strip 806 connected through the wire can be adjusted, and the number of the first springs 802 and the specific fixing position of the first springs 802 on the fixed ring 801 and the vibration ring 803 can be adjusted.

[0055] Optionally, the amplitude detection assembly 8 further comprises a plurality of limiting plates 811 and a plurality of second springs 812. One of the limiting plates 811 is connected to one end of the sliding rod 804 away from the vibration ring 803; one of the second springs 812 is sleeved on the sliding rod 804, and opposite ends of the second spring 812 are fixedly connected with the limiting plate 811 and the fixed sleeve 805 respectively. With such an arrangement, in the initial state, the sliding rod 804 can be in close abutment with the vibration ring 803 under the action of the second spring 812, and after the vibration ring 803 vibrates with the sliding tube 7 and the rotor of the hydraulic turbine 5 and pushes the sliding rod 804 out, the sliding rod 804 can automatically return to the initial position under the elastic force of the second spring 812, thereby eliminating the manual adjustment process and continuously testing the amplitude change of the rotor of the hydraulic turbine 5 under different gas concentration conditions, which is conducive to improving the work efficiency.

[0056] In the embodiment, as shown in Figure 3 Fig. 4, the end of each of the sliding rods 804 away from the vibration ring 803 is fixed with the limiting plate 811, and the second spring 812 is sleeved on the sliding rod 804, and opposite ends of the second spring 812 are fixedly connected with the limiting plate 811 and the fixed sleeve 805 respectively.

[0057] Optionally, the gas-containing condition hydraulic turbine performance test equipment further comprises a sealing pipe 18 and a first telescopic member 19. The first end of the sealing pipe 18 is sleeved on the liquid outlet pipe 16 and movably connected with the liquid outlet pipe 16, the second end of the sealing pipe 18 penetrates through the support box 4 and movably connected with the support box 4, and is in communication with the liquid inlet of the hydraulic turbine 5; the fixed end of the first telescopic member 19 is fixed on the support box 4, and the movable end of the first telescopic member 19 is connected with the sealing pipe 18 to drive the sealing pipe 18 to move along the liquid outlet pipe 16. With such an arrangement, when the liquid outlet pipe 16 is not aligned with the liquid inlet of the hydraulic turbine 5 and the hydraulic turbine 5 needs to be moved, the liquid outlet pipe 16 does not need to be disassembled, and the sealing pipe 18 can be driven to move upward along the liquid outlet pipe 16 by the first telescopic member 19, so as to be disconnected with the hydraulic turbine 5, and after the hydraulic turbine 5 is moved to a suitable position, the sealing pipe 18 can be driven to move downward and be in communication with the liquid inlet of the hydraulic turbine 5.

[0058] In the embodiment, the upper end of the sealing pipe 18 is sleeved on the liquid outlet pipe 16, the lower end penetrates through the support box 4 and is in communication with the liquid inlet of the hydraulic turbine 5, and the first telescopic member 19 is selected as a telescopic air cylinder, as shown in Figure 1As shown, the fixed end of the telescopic cylinder is fixedly connected with the top of the support box 4, the outer wall of the sealing pipe 18 is fixed with a connecting plate, and the movable end of the telescopic cylinder, i.e. the free end of the telescopic rod of the telescopic cylinder, is fixedly connected with the connecting plate. When the hydraulic turbine 5 needs to be moved, the telescopic cylinder is started to make the telescopic rod of the telescopic cylinder extend outward, thereby driving the connecting plate connected therewith and the sealing pipe 18 to move upward and be separated from the hydraulic turbine 5; after the hydraulic turbine 5 is moved to a suitable position, the telescopic cylinder is started to make the telescopic rod of the telescopic cylinder retract inward, thereby driving the connecting plate connected therewith and the sealing pipe 18 to move downward and re-connect and compress the liquid inlet of the hydraulic turbine 5. According to actual application conditions, the first telescopic member 19 can adopt any telescopic structure as long as it can drive the sealing pipe 18 to reciprocate along the liquid outlet pipe 16, thereby connecting or separating from the hydraulic turbine 5.

[0059] Figure 5 For Figure 1 As shown in the internal structure side view of the support box 4 of the hydraulic turbine 5 performance test equipment for gas-containing working conditions, the first telescopic member 19 is arranged on the top of the support box 4. Figure 5 As shown, optionally, the hydraulic turbine performance test equipment for gas-containing working conditions further comprises a slide 20, a limiting frame 21 and a sliding block 22. The slide 20 is arranged on the inner wall of the bottom side of the support box 4; the hydraulic turbine 5 is fixed on the limiting frame 21; the sliding block 22 is fixedly connected with the limiting frame 21 and slidably connected with the slide 20. With this arrangement, when the hydraulic turbine 5 needs to be moved, the hydraulic turbine 5 on the limiting frame 21 can be easily moved by the movement of the sliding block 22 on the slide 20, thereby reducing the labor intensity.

[0060] In this embodiment, as shown in Figure 1 、 Figure 5 As shown, two slides 20 are fixed on the inner wall of the bottom side of the support box 4, two limiting frames 21 are arranged in the support box 4, the hydraulic turbine 5 is fixed in the middle by the two limiting frames 21, the sliding block 22 is fixed at the bottom end of each limiting frame 21, and the sliding block 22 is arranged on the slide 20 and slidably connected with the slide 20. When the slide 20 is installed, the hydraulic turbine 5 strictly corresponds to the sealing pipe 18 above in the direction perpendicular to the slide 20, so that when the hydraulic turbine 5 and the sealing pipe 18 are connected, if the positions need to be adjusted, the position of the hydraulic turbine 5 can be finely adjusted in the direction along the slide 20 by the cooperation of the sliding block 22 and the slide 20.

[0061] Optionally, the gas-bearing working condition hydraulic turbine performance test device further comprises a second telescopic member 23, a fixed end of the second telescopic member 23 is fixed to an inner wall of the support box 4, and a movable end of the second telescopic member 23 is fixedly connected with the limiting frame 21. By means of the second telescopic member 23, the position of the hydraulic turbine 5 can be finely adjusted, and the large error caused by manual adjustment can be avoided.

[0062] In the embodiment, as shown in Figure 5 the second telescopic member 23 is an electric telescopic rod, a fixed end of the electric telescopic rod is fixed to an inner wall of the support box 4, and a movable end of the electric telescopic rod is fixedly connected with the limiting frame 21. When the position of the hydraulic turbine 5 needs to be adjusted, the first telescopic member 19 is started to drive the sealing pipe 18 to move upward and be separated from the hydraulic turbine 5, and then the second telescopic member 23 is started to drive the limiting frame 21, the hydraulic turbine 5 connected with the limiting frame 21 and the sliding block 22 to move along the slide 20 until the liquid inlet of the hydraulic turbine 5 is aligned with the sealing pipe 18 above. According to actual application conditions, the second telescopic member 23 can adopt any telescopic structure as long as it can drive the hydraulic turbine 5 to reciprocatingly move along the slide 20.

[0063] Optionally, the sliding pipe 7 and the rotor of the hydraulic turbine 5 and the rotating shaft of the dynamometer 6 are connected by means of keys, and the sliding pipe 7 and the vibration ring 803 are movably connected. By means of the key connection, the connection relationship between the sliding pipe 7 and the rotor of the hydraulic turbine 5 and the rotating shaft of the dynamometer 6 is simplified, the sliding pipe 7 can be quickly inserted into the vibration ring 803, assembly and operation are facilitated, the vibration of the rotor of the hydraulic turbine 5 can stably drive the vibration ring 803 to shake in the fixed ring 801, thereby ensuring the stability during the test, and when the hydraulic turbine 5 needs to be moved, the sliding pipe 7 only needs to be pulled toward the dynamometer 6, the connecting key 24 on the sliding pipe 7 slides along the connecting groove on the surface of the rotating shaft of the dynamometer 6 until the sliding pipe 7 is separated from the hydraulic turbine 5, and thus complicated disassembly is not needed, and work efficiency is improved.

[0064] In the embodiment, as shown in Figure 3As shown, the inner wall of the sliding tube 7 is fixed with a connecting key 24, and the surface of the rotor of the hydraulic turbine 5 and the rotating shaft of the dynamometer 6 are both provided with a matching connecting groove, the connecting key 24 is inserted into the connecting groove to realize the connection between the sliding tube 7 and the rotor of the hydraulic turbine 5 and the rotating shaft of the dynamometer 6, and when the connecting key 24 is inserted into the connecting groove on the surface of the rotor, the sliding tube 7 can move relative to the vibration ring 803. The outer wall diameter of the sliding tube 7 matches the inner wall diameter of the vibration ring 803, the sliding tube 7 can move linearly along the vibration ring 803 reciprocally, and can also rotate relative to the vibration ring 803, and can stably transmit the vibration to the vibration ring 803 when the rotor vibrates.

[0065] Optionally, the gas-containing working condition hydraulic turbine performance test equipment further comprises a baffle 25 and a third spring 26. The baffle 25 is fixedly connected with the outer wall of the sliding tube 7 exposed from the support box 4; the third spring 26 is sleeved on the sliding tube 7, and the opposite ends are fixedly connected with the outer wall of the support box 4 and the baffle 25. When it is necessary to move the hydraulic turbine 5, the baffle 25 is pulled to drive the sliding tube 7 to move along the inner surface of the vibration ring 803 towards the dynamometer 6, and after the connection between the sliding tube 7 and the rotor of the hydraulic turbine 5 is released and the hydraulic turbine 5 is moved to a suitable position, the external force applied to the baffle 25 is released, and then under the elastic force of the third spring 26, the baffle 25 and the sliding tube 7 move towards the hydraulic turbine 5, and the sliding tube 7 is reinserted into the vibration ring 803, and the connecting key 24 on the sliding tube 7 is reinserted into the connecting groove on the surface of the rotor of the hydraulic turbine 5 to realize the reconnection of the sliding tube 7 and the rotor.

[0066] In this embodiment, as shown in Figure 1 , Figure 2 The baffle 25 is fixed on the circumference of the sliding tube 7, and the left end of the third spring 26 is fixed on the right outer wall of the support box 4, and the right end is fixed on the baffle 25.

[0067] Optionally, the gas-containing working condition hydraulic turbine performance test equipment further comprises a booster pump 27, and the booster pump 27 is in communication with the mixing tank 1. The booster pump 27 is provided to increase the pressure in the mixing tank 1, thereby improving the solubility of the gas in water.

[0068] In this embodiment, as shown in Figure 1 The booster pump 27 is arranged at the top end of the mixing tank 1.

[0069] Optionally, the gas-containing working condition hydraulic turbine performance test device further comprises a pressure gauge 28 arranged on the mixing tank 1. The pressure gauge 28 is arranged to monitor the pressure in the mixing tank 1 in real time, preventing excessive pressure from causing safety risks.

[0070] In this embodiment, as shown in the figure, the pressure gauge 28 is arranged at the top end of the mixing tank 1. Figure 1

[0071] The use process of the gas-containing working condition hydraulic turbine performance test device will be further introduced below:

[0072] ​In use, the first telescopic part 19 is started to drive the sealing pipe 18 to move upward to disconnect with the hydraulic turbine 5, the baffle 25 is pulled to drive the sliding pipe 7 to move to the dynamometer 6 to disconnect with the rotor of the hydraulic turbine 5, the second telescopic part 23 is started to drive the limiting frame 21 to drive the hydraulic turbine 5 to move along the slide 20 to the position right below the sealing pipe 18, then the first telescopic part 19 is started to drive the sealing pipe 18 to move downward to communicate with the liquid inlet of the hydraulic turbine 5 again, the baffle 25 is released, the sliding pipe 7 is connected with the rotor of the hydraulic turbine 5 again under the elastic force of the third spring 26. The second valve 15 and the water pump 14 are opened to send a certain amount of water in the water storage tank 3 to the mixing tank 1 through the water pipe 13, the first valve 12 and the gas pump 10 are opened to send the gas in the gas tank 2 to the mixing tank 1 through the gas pipe 9, and the gas flow meter 11 is used to monitor the gas flow sent to the mixing tank 1 to prepare mixed liquid with different gas concentrations in the mixing tank 1, the second valve 15, the water pump 14, the first valve 12 and the gas pump 10 are closed, the pressure in the mixing tank 1 can be increased by starting the booster pump 27 to make the gas dissolved in the liquid as much as possible, when the gas in the mixing tank 1 is sufficiently dissolved in the water, the liquid pump 17 is started to extract the mixed liquid in the mixing tank 1 to the hydraulic turbine 5 through the liquid outlet pipe 16 and the sealing pipe 18, thereby driving the impeller in the hydraulic turbine 5 to rotate, the impeller rotation further drives the rotor of the hydraulic turbine 5 to rotate, the rotor rotation drives the sliding pipe 7 connected thereto to rotate, and finally power is transmitted to the dynamometer 6 connected with the sliding pipe 7, so that the dynamometer 6 measures the energy recovery efficiency of the hydraulic turbine 5. While the rotor of the hydraulic turbine 5 rotates, it is affected by the separated gas to produce vibrations of different degrees, thereby driving the sliding pipe 7 to vibrate, the sliding pipe 7 vibration further drives the vibration ring 803 to vibrate, the vibration ring 803 vibration drives the sliding rod 804 in the vibration direction to move in the through hole, the sliding rod 804 movement drives the fixed conductive strip 806 and the resistance strip 807 on it to move, the resistance strip 807 moves relative to the second conductive block 809, so that the resistance value in the current loop changes, the current value in the current loop monitored by the current sensor changes, the current sensor transmits the monitored current value to the controller in real time, the controller can calculate the change of the resistance in the current loop according to the change of the current value, thereby obtaining the movement distance of the resistance strip 807, the movement distance of the resistance strip 807 is also the distance that the sliding rod 804 is pushed out by the vibration ring 803, which corresponds to the vibration amplitude of the rotor of the hydraulic turbine 5.

[0073] The hydraulic turbine performance test equipment for gas-containing working conditions is used to prepare mixed liquid with different gas concentrations in the mixing tank 1, the dynamometer 6 is used to test the energy recovery efficiency of the hydraulic turbine 5 under different gas-containing working conditions, the amplitude detection assembly 8 is used to monitor the vibration amplitude change of the rotor of the hydraulic turbine 5 under different gas-containing working conditions, and the energy recovery efficiency test result and the rotor amplitude monitoring result are comprehensively combined to comprehensively test the stability of the hydraulic turbine under different gas-containing working conditions, and the reliability of the hydraulic turbine stability test result is improved.

[0074] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A gas-bearing operating condition hydraulic turbine performance test apparatus, characterized by, The utility model relates to a kind of gas concentration detection device, including: Mixing tank, different gas concentration mixture is prepared in the mixing tank; Gas tank, the gas outlet of the gas tank is communicated with the inlet of the mixing tank by gas conveying pipe, gas conveying pump, gas flow meter and first valve are installed on the gas conveying pipe; Water storage tank, the water outlet of the water storage tank is communicated with the inlet of the mixing tank by water conveying pipe, water conveying pump and second valve are installed on the water conveying pipe; Support box; Hydraulic turbine, the liquid inlet of the hydraulic turbine is communicated with the outlet of the mixing tank by liquid outlet pipe, liquid pumping pump is installed on the liquid outlet pipe, the rotor of the hydraulic turbine is rotated, and is affected by the gas extracted, and different degrees of vibration are generated; Dynamometer; Sliding tube, the first end of the sliding tube penetrates the support box, and is connected with the rotor of the hydraulic turbine, and the second end of the sliding tube is connected with the rotating shaft of the dynamometer; Amplitude detection component, the inner wall of the support box is connected with the amplitude detection component, and the sliding tube is sleeved, for monitoring the amplitude of the rotor of the hydraulic turbine; The amplitude detection component includes: Fixed ring, the inner wall of the support box is fixedly connected with the fixed ring, and a plurality of through holes are formed in the circumferential direction of the fixed ring; A plurality of first springs, the first end of the first spring is fixedly connected with the inner wall of the fixed ring; Vibration ring, the outer wall of the vibration ring is fixedly connected with the second end of each first spring, the inner wall of the vibration ring is sleeved with the sliding tube, and is rotatably connected with the sliding tube; A plurality of sliding rods, one sliding rod penetrates one through hole, and is slidably connected with the fixed ring, each sliding rod is abutted with the vibration ring, the outer wall of each sliding rod is fixedly provided with a conductive strip and a resistance strip, and the conductive strip and the resistance strip are connected by wires; A plurality of fixed sleeves, one fixed sleeve is sleeved with one sliding rod, is slidably connected with the sliding rod, and is fixedly connected with the fixed ring, the inner wall of each fixed sleeve is fixedly provided with a first conductive block and a second conductive block, the first conductive block is abutted with the conductive strip, and the second conductive block is abutted with the resistance strip; A plurality of current sensors, one current sensor monitors the current value flowing through one resistance strip; Controller, the input end of the controller is communicatively connected with the output end of each current sensor.

2. The gas-bearing hydraulic turbine performance test apparatus according to claim 1, characterized by, The amplitude detection component further includes: A plurality of limit plates, one limit plate is connected with one end of one sliding rod away from the vibration ring; A plurality of second springs, one second spring is sleeved with one sliding rod, and the opposite ends of the second spring are fixedly connected with the limit plate and the fixed sleeve respectively.

3. A gas-bearing condition hydraulic turbine performance test apparatus according to claim 1 or 2, characterized by, Further including: Sealing tube, the first end of the sealing tube is sleeved with the liquid outlet pipe, and is movably connected with the liquid outlet pipe, the second end of the sealing tube penetrates the support box, is movably connected with the support box, and is communicated with the liquid inlet of the hydraulic turbine; First telescopic piece, the fixed end of the first telescopic piece is fixed on the support box, the movable end of the first telescopic piece is connected with the sealing tube, drives the sealing tube to move along the liquid outlet pipe.

4. The gas-bearing performance test apparatus for a hydraulic turbine according to claim 3, characterized by Further including: A slide is arranged in the inner wall of the bottom side of the support box; The hydraulic turbine is fixed on the limiting frame; The sliding block is fixedly connected with the limiting frame and slidably connected with the slide.

5. The gas-bearing performance test apparatus for a hydraulic turbine according to claim 4, characterized by Further comprising: A second telescopic member, the fixed end of which is fixed to the inner wall of the support box, and the movable end of which is fixedly connected with the limiting frame.

6. The hydraulic turbine performance testing device for gas-containing working conditions according to claim 4, characterized in that: The sliding pipe is connected with the rotor of the hydraulic turbine and the rotating shaft of the dynamometer through keys; The sliding pipe is movably connected with the vibration ring.

7. The gas-bearing performance test apparatus for a hydraulic turbine according to claim 6, characterized by Further comprising: A baffle is fixedly connected with the outer wall of the support box where the sliding pipe is exposed; A third spring is sleeved on the sliding pipe, and the opposite ends thereof are fixedly connected with the outer wall of the support box and the baffle, respectively.

8. The gas-bearing condition hydraulic turbine performance test apparatus according to claim 1 or 2, characterized by, Further comprising: A booster pump is communicated with the mixing tank.

9. The gas-bearing condition hydraulic turbine performance test apparatus according to claim 1 or 2, characterized by, Further comprising: A pressure gauge is arranged on the mixing tank.

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