Internal oil supply blade angle regulator of horizontal water pump unit

Abstract

The invention relates to an internal oil supply blade angle adjuster of a horizontal water pump unit, and belongs to the technical field of water pump blade working condition adjusting and controlling devices. The internal oil supply hydraulic adjusting device is composed of a blade adjusting device, a main shaft and an adjusting rod, a piston cavity and an oil tank cavity are formed in the blade adjusting device, a meshing worm injection pump, a change-over valve, a hydraulic locking valve and other components are arranged in the oil tank cavity, and movement of a piston and a piston rod is adjusted and controlled in an internal oil supply hydraulic adjusting mode. Therefore, the purpose of adjusting the angle of the horizontal water pump blade is achieved. The regulator is accurate in blade angle regulation, simple in structure, energy-saving, environment-friendly and convenient to maintain, and hydraulic oil circulates in the blade regulating device without leakage. The problems that the blade angle of an existing horizontal water pump is adjusted in a hydraulic station external oil supply mode, dynamic sealing points cannot be completely sealed during rotation, hydraulic oil leakage is serious, the working efficiency of the horizontal water pump is low, an adjusting device is large in size, and an adjuster is installed underwater and is inconvenient to maintain are solved.

Description

Technical Field

[0001] The invention relates to an internal oil supply blade angle regulator for a horizontal water pump unit, belonging to the technical field of water pump blade working condition regulating control devices. Background Art

[0002] At present, the low-lift water pumps used in pump stations in my country are all axial flow pumps. Axial flow pumps are divided into vertical water pumps and horizontal water pumps. Horizontal water pumps are generally used in places with relatively flat geographical locations or slow water flows. The characteristics of axial flow pumps are low head, large flow, and narrow high-efficiency zone. A slight change in its working head will cause the water pump working condition to deviate from the high-efficiency zone, and the water pump efficiency will decrease. The existing technology for changing the characteristics of axial flow pumps is to adjust its working point by changing the installation angle of the axial flow pump blades to improve its working efficiency. The existing adjustment of the blade angle of the horizontal axial flow pump uses a hydraulic regulator, and all use the external oil supply method of the hydraulic station, that is, after drilling a hole on the main shaft, two oil pipes are connected to the two ends of the piston in the water pump, driving the piston in the water pump to move left and right, thereby driving the blade adjustment arm to adjust the blade angle. Due to the special structure of the external oil supply of the axial flow pump, a rotating dynamic sealing point is required. As a result, the oil inlet pipe seal of the oil receiver cannot be completely sealed due to objective conditions. This leads to leakage in actual use, making it impossible for the system pressure to reach the high oil pressure zone, and thus failing to achieve the optimal adjustment of the blade angle.

[0003] On the other hand, when the external oil supply hydraulic system is used on a vertical water pump, the hydraulic oil supply system is in a vertical state, and the blade angle adjuster is installed at the top of the water pump shaft. When working, it only bears the thrust during adjustment, and there is no torque, so that the hydraulic oil leakage of the external oil supply hydraulic system is not particularly prominent; but when the external oil supply hydraulic system is used on a horizontal water pump unit, the hydraulic oil supply system is in a horizontal state, and the blade angle adjuster is installed in the middle between the water pump shaft and the motor shaft. When working, it not only bears the thrust during adjustment, but also bears the torque when the unit is working, so that the hydraulic oil leakage of the rotating dynamic seal is particularly prominent, resulting in more serious leakage of hydraulic oil, which not only pollutes the environment and causes energy waste, but also affects the stable operation of the unit due to leakage, and requires frequent pressure replenishment, resulting in frequent start and stop of the hydraulic system.

[0004] In addition, external oil supply requires the use of an external oil supply hydraulic station. Its oil cylinder, piston in the water pump and other equipment are installed in the water pump impeller room and are in an underwater working state for a long time. The blade angle adjuster is large in size and the oil supply system equipment is complicated, which makes the blade angle adjuster of the horizontal water pump unit extremely inconvenient to install, and there are many faults during operation and hydraulic oil leakage often occurs. In addition, the regulator is installed underwater, which is extremely inconvenient to maintain and the maintenance workload is large, resulting in high cost of use. Summary of the invention

[0005] The purpose of the present invention is to provide an internal oil supply blade angle regulator for a horizontal water pump unit in view of the deficiencies of the above-mentioned prior art. The regulator is composed of a blade adjustment device, a main shaft and an adjustment rod, and the oil tank, the internal meshing volute injection pump, the safety valve, the conversion valve and the hydraulic locking valve arranged in the blade adjustment device are all sealed and placed in the water position of the unit. The internal oil supply hydraulic adjustment is adopted. Since there is no rotating seal, the system hydraulic oil pressure can be greatly improved, the volume of the hydraulic system can be greatly reduced, and the hydraulic oil circulates in the blade adjustment device without leakage, so that the regulator is small in size, simple in structure, energy-saving and environmentally friendly, and easy to maintain. In order to solve the problem that the blade angle adjustment of the existing horizontal water pump unit adopts the external oil supply method of the hydraulic station, the dynamic sealing point cannot be completely sealed when the axial flow pump rotates, resulting in the system pressure cannot reach the high oil pressure area to work, the blade angle adjustment cannot be well realized, and the volume is large, the maintenance workload is large, and the use cost is very high.

[0006] The present invention achieves the above-mentioned purpose through the following technical solutions: A horizontal water pump unit internal oil supply blade angle adjuster, which consists of a blade adjusting device, a main shaft and an adjusting rod, and is characterized in that: the left end of the blade adjusting device is elastically connected to the output end gear of the reducer through a connecting gear, and the right end of the blade adjusting device is sleeved and fixed on the left end of the main shaft; the left end of the main shaft is fixed in a thrust bearing, and the right end of the main shaft is fixedly connected to the left end of the mounting volute of the water pump blade through a connecting flange b; the left end of the adjusting rod is fixedly connected to the connecting flange a in the blade adjusting device through a connecting flange c, and the right end of the adjusting rod is fixedly connected to the left end of the piston in the water pump through a connecting sleeve.

[0007] The blade adjustment device consists of a left coupling, a piston, a piston rod, two retaining rings a, two partitions a, a retaining ring b, partition b, connecting bolts, and a right coupling. The left coupling and the right coupling are connected by connecting bolts; the left coupling is divided into a piston chamber by two partitions a, the two partitions a are positioned by two retaining rings a, and the oil tank chamber is divided by partitions b and one partition a. The piston chamber is equipped with a piston and a piston rod, one end of the piston rod is fixed to the piston, and the other end extends out of the piston chamber and is made with a connecting flange a; a connecting plate is made in the right coupling.

[0008] A permanent magnet drive motor, a continuously variable speed and frequency conversion module, an internal meshing volute injection pump, a safety valve, a conversion valve and a hydraulic locking valve are installed in the oil tank chamber in the left coupling. The conversion valve is connected to the piston chamber at the left end of the piston through an oil pipe, and the hydraulic locking valve is connected to the piston chamber at the right end of the piston through an oil pipe; the internal meshing volute injection pump is installed on the permanent magnet drive motor and is connected to the piston chamber through an oil pipe, and the continuously variable speed and frequency conversion module is installed on the permanent magnet drive motor; the safety valve is electrically connected to the internal meshing volute injection pump.

[0009] The left end of the main shaft is fixedly connected to the connecting plate in the right coupling by connecting screws.

[0010] The adjusting rod is sleeved in the main shaft, the left end of the adjusting rod is movably fixed to the inner hole of the connecting shaft at the left end of the main shaft through a copper sleeve, and the right end of the adjusting rod is movably fixed to the inner hole of the connecting flange b at the right end of the main shaft through a copper sleeve.

[0011] The permanent magnet drive motor, the stepless speed and frequency conversion module, the internal meshing volute injection pump, the safety valve, the conversion valve and the hydraulic locking valve are electrically connected to the collector ring.

[0012] The beneficial effects of the present invention compared with the prior art are: The internal oil supply blade angle regulator of the horizontal water pump unit is composed of a blade adjustment device, a main shaft and an adjustment rod. The blade adjustment device is provided with a piston chamber and an oil tank chamber through a partition and a clamping ring. The oil tank chamber is provided with a meshing volute injection pump, a safety valve, a conversion valve and a hydraulic locking valve and other components. The internal oil supply hydraulic adjustment method is used to regulate the horizontal movement of the piston and the piston rod, so as to achieve the purpose of adjusting the angle of the horizontal water pump blade. The regulator accurately adjusts the blade angle, so that the horizontal water pump operating point is in the best position, with high working efficiency, small size, simple structure, hydraulic oil circulates in the blade adjustment device without leakage, energy saving and environmental protection, and all the parts of the regulator are placed on the water for easy maintenance. The invention solves the problem that the blade angle adjustment of the existing horizontal water pump is carried out by means of external oil supply of the hydraulic station, the dynamic sealing point cannot be completely sealed during rotation, and the hydraulic oil leakage of the rotating dynamic seal cannot be solved. The hydraulic oil leakage is very serious, resulting in the system pressure being unable to reach the high oil pressure zone to work, thereby causing the regulator to be unable to achieve precise adjustment of the blade angle, resulting in low working efficiency of the horizontal water pump, and the adjustment device is large in size, the regulator is installed underwater, the maintenance workload is large, and the use cost is very high. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the internal oil supply blade angle regulator of a horizontal water pump unit; Figure 2 The structural diagram of the main axis; Figure 3 is a schematic diagram of the structure of the adjusting rod; Figure 4 is a schematic diagram of the structure of the blade adjustment device; Figure 5 It is a structural schematic diagram of the left coupling device; Figure 6 It is a structural schematic diagram of the right coupling device; Figure 7 This is a structural schematic diagram of the internal oil supply blade angle adjuster of the horizontal water pump unit installed on the horizontal water pump; Figure 8 It is a structural schematic diagram of a horizontal water pump in the prior art.

[0014] In the figure: 1, blade adjustment device, 101, left coupling, 102, piston, 103, piston rod, 104, connecting flange a, 105, snap ring a, 106, partition a, 107, snap ring b, 108, partition b, 109, permanent magnet drive motor, 1010, stepless speed change frequency conversion module, 1011, internal meshing volute injection pump, 1012, safety valve, 1013, conversion valve, 1014, hydraulic locking valve, 1015, connecting gear, 10 16. Collector ring, 1017. Connecting bolt, 1018. Right coupling, 1019. Connecting plate, 1020. Connecting screw, 2. Main shaft, 201. Connecting shaft, 202. Connecting flange b, 203. Connecting key, 3. Adjusting rod, 301. Connecting flange c, 302. Connecting sleeve, 4. Copper sleeve, 5. Water pump blade, 6. Thrust bearing, 7. Reducer, 8. Output end gear, 9. Main motor, 10. Piston inside the water pump, 11. Blade adjustment arm. DETAILED DESCRIPTION

[0015] The following is attached Figure 1-8 The present invention is further described as follows.

[0016] The internal oil supply blade angle regulator of the horizontal water pump unit is obtained by removing the hydraulic adjustment device of the external oil supply blade angle regulator of the existing horizontal water pump and adjusting the blade angle of the horizontal water pump by internal oil supply. The internal oil supply blade angle adjuster of the horizontal water pump unit is composed of a blade adjusting device 1, a main shaft 2 and an adjusting rod 3. The left end of the blade adjusting device 1 is elastically connected to the output end gear 8 of the reducer 7 through a connecting gear 1015, and the right end of the blade adjusting device 1 is fixedly sleeved on the left end of the main shaft 2; and the connecting plate 1019 in the right coupling 1018 of the blade adjusting device 1 is fixedly connected to the left end of the main shaft 2 through a connecting screw 1020; the left end of the main shaft 2 is fixed in the thrust bearing 6, and the right end of the main shaft 2 is fixedly connected to the left end of the mounting volute of the water pump blade 5 through a connecting flange b202; the left end of the adjusting rod 3 is fixedly connected to the connecting flange a104 in the blade adjusting device 1 through a connecting flange c301, and the right end of the adjusting rod 3 is fixedly connected to the left end of the piston 10 in the water pump through a connecting sleeve 302.

[0017] Furthermore, the blade adjustment device 1 is composed of a left coupling 101, a piston 102, a piston rod 103, two retaining rings a105, two partitions a106, a retaining ring b107, a partition b108, a connecting bolt 1017, and a right coupling 1018. The left coupling 101 and the right coupling 1018 are connected and fixed by the connecting bolts 1017; the left coupling 101 is partitioned into a piston chamber by two partitions a106, the two partitions a106 are positioned and fixed by two retaining rings a105, and are partitioned into an oil tank chamber by partitions b108 and a partition a106; the piston chamber is equipped with a piston 102 and a piston rod 103, one end of the piston rod 103 is fixed to the piston 102, and the other end extends out of the piston chamber and is made with a connecting flange a104; the right coupling 1018 is made with a connecting plate 1019.

[0018] Furthermore, a permanent magnet drive motor 109, a continuously variable speed and frequency conversion module 1010, an internal meshing volute injection pump 1011, a safety valve 1012, a conversion valve 1013 and a hydraulic locking valve 1014 are installed in the oil tank chamber in the left coupling 101; the conversion valve 1013 is connected to the piston chamber at the left end of the piston 102 through an oil pipe, and the hydraulic locking valve 1014 is connected to the piston chamber at the right end of the piston 102 through an oil pipe; the internal meshing volute injection pump 1011 is installed on the permanent magnet drive motor 109 and is connected to the piston chamber through an oil pipe, and the continuously variable speed and frequency conversion module 1010 is installed on the permanent magnet drive motor 109; the safety valve 1012 is electrically connected to the internal meshing volute injection pump 1011. The permanent magnet drive motor 109 , the continuously variable speed and frequency conversion module 1010 , the internal meshing volute injection pump 1011 , the safety valve 1012 , the conversion valve 1013 and the hydraulic locking valve 1014 are electrically connected to the collector ring 1016 .

[0019] Furthermore, the adjusting rod 3 is sleeved in the main shaft 2 and can slide left and right in the main shaft 2. The left end of the adjusting rod 3 is movably fixed to the inner hole of the connecting shaft 201 at the left end of the main shaft 2 through the copper sleeve 4, and the right end of the adjusting rod 3 is movably fixed to the inner hole of the connecting flange b202 at the right end of the main shaft 2 through the copper sleeve 4.

[0020] The working process of the internal oil supply blade angle regulator of the horizontal water pump unit is as follows: The internal oil supply blade angle adjuster of the horizontal water pump unit is installed on the output end gear 8 of the reducer 7 of the horizontal water pump through the blade adjustment device 1, and is fixedly connected to the left end of the mounting volute of the water pump blade 5 through the main shaft 2. The adjustment rod 3 is sleeved in the main shaft 2 and connected to the original water pump internal piston 10 of the horizontal water pump. When the internal oil supply blade angle adjuster of the horizontal water pump unit is working, it rotates synchronously with the rotor body of the horizontal water pump. When working: When the horizontal water pump operates normally, the left and right piston chambers of the piston 102 cannot move left and right under the action of the hydraulic locking valve 1014. At this time, the angle of the water pump blade 5 of the horizontal water pump is locked at a certain angle by the hydraulic locking valve 1014 and the safety valve 1012.

[0021] When the system (the system is the original command system of the horizontal water pump) detects that the blade angle needs to be adjusted to the right, the system will issue an adjustment command, the collector ring 1016 connects the power supply of the permanent magnet drive motor 109, the permanent magnet drive motor 109 is powered and starts working, and the high-pressure oil is pressed into the left piston chamber of the piston 102 through the internal meshing volute injection pump 1011, pushing the piston 102 to the right, and the return oil in the right piston chamber of the piston 102 flows into the oil tank chamber, and the piston 102 drives the adjusting rod 3 through the connecting flange a104 on the piston rod 103 to move the piston 10 in the water pump to the right, and drives the blade adjusting arm 11 to adjust the angle of the water pump blade 5 to the right, that is, the water pump blade 5 is adjusted at a positive angle. After the adjustment is completed, it is locked by the hydraulic locking valve 1014 and the safety valve 1012.

[0022] When the system detects that the blade angle needs to be adjusted to the left, the system will issue an adjustment command, the collector ring 1016 connects the power supply of the permanent magnet drive motor 109, the permanent magnet drive motor 109 is powered and starts working, and the high-pressure oil is pressed into the right piston chamber of the piston 102 through the internal meshing volute injection pump 1011, pushing the piston 102 to the left, and the return oil in the left piston chamber of the piston 102 flows into the oil tank chamber, and the piston 102 drives the adjusting rod 3 through the connecting flange a104 on the piston rod 103 to move the piston 10 in the water pump to the left, and drives the blade adjusting arm 11 to adjust the angle of the water pump blade 5 to the left, that is, the water pump blade 5 is negatively angled, and after the adjustment is completed, it is locked by the hydraulic locking valve 1014 and the safety valve 1012.

[0023] The internal oil supply blade angle regulator of the horizontal water pump unit is small in size and simple in structure. It is installed at the reducer 7 on the main motor 9 and the middle coupling of the water pump, and rotates synchronously with the rotor body. There is no need to set a separate rotating seal, and there will be no leakage due to rotation, which improves the safety performance of the horizontal water pump blade angle synchronous regulator and solves the problems of the existing horizontal water pump regulator using external oil supply, which is bulky, has serious hydraulic oil leakage, pollutes the environment, and needs to be frequently re-pressurized due to leakage, and the hydraulic system is frequently started and stopped, resulting in energy waste.

[0024] The above description is only a preferred embodiment of the present invention. The above examples do not impose any form of limitation on the essential content of the present invention. Any simple modification or deformation made by ordinary technicians in the technical field to the above specific implementation methods based on the technical essence of the present invention after reading this specification, as well as equivalent embodiments that may be changed or modified to equivalent changes using the technical content disclosed above, still fall within the scope of the technical solution of the present invention without departing from the essence and scope of the present invention.

Claims

1. An internal oil supply blade angle adjuster for a horizontal water pump unit, comprising a blade adjustment device (1), a main shaft (2) and an adjustment rod (3), characterized in that: The left end of the blade adjustment device (1) is elastically connected to the output end gear (8) of the reducer (7) via a connecting gear (1015), and the right end of the blade adjustment device (1) is sleeved and fixed to the left end of the main shaft (2); the left end of the main shaft (2) is fixed in the thrust bearing (6), and the right end of the main shaft (2) is fixedly connected to the left end of the mounting volute of the water pump blade (5) via a connecting flange b (202); the left end of the adjustment rod (3) is fixedly connected to the connecting flange a (104) in the blade adjustment device (1) via a connecting flange c (301), and the right end of the adjustment rod (3) is fixedly connected to the left end of the piston (10) in the water pump via a connecting sleeve (302).

2. The internal oil supply blade angle adjuster of a horizontal water pump unit according to claim 1, characterized in that: The blade adjustment device (1) comprises a left coupling (101), a piston (102), a piston rod (103), two snap rings a (105), two baffles a (106), a snap ring b (107), a baffle b (108), a connecting bolt (1017), and a right coupling (1018). The left coupling (101) and the right coupling (1018) are connected via the connecting bolt (1017). The left coupling (101) is provided with a plurality of connecting bolts (1017) and a plurality of connecting bolts (1018). ) is partitioned into a piston chamber, two partitions a (106) are positioned by two retaining rings a (105), and a tank chamber is partitioned by partition b (108) and a partition a (106), a piston (102) and a piston rod (103) are installed in the piston chamber, one end of the piston rod (103) is fixedly connected to the piston (102), and the other end extends out of the piston chamber and is made with a connecting flange a (104); a connecting plate (1019) is made in the right coupling (1018).

3. The internal oil supply blade angle adjuster of a horizontal water pump unit according to claim 2, characterized in that: A permanent magnet drive motor (109), a continuously variable speed and frequency conversion module (1010), an internal meshing volute injection pump (1011), a safety valve (1012), a conversion valve (1013) and a hydraulic locking valve (1014) are installed in the oil tank chamber in the left coupling (101); the conversion valve (1013) is connected to the piston chamber at the left end of the piston (102) through an oil pipe, and the hydraulic locking valve (1014) is connected to the piston chamber at the right end of the piston (102) through an oil pipe; the internal meshing volute injection pump (1011) is installed on the permanent magnet drive motor (109) and is connected to the piston chamber through an oil pipe; the continuously variable speed and frequency conversion module (1010) is installed on the permanent magnet drive motor (109); and the safety valve (1012) is electrically connected to the internal meshing volute injection pump (1011).

4. The internal oil supply blade angle adjuster of a horizontal water pump unit according to claim 1, characterized in that: The left end of the main shaft (2) is fixedly connected to a connecting plate (1019) in the right coupling (1018) via connecting screws (1020).

5. The internal oil supply blade angle adjuster of a horizontal water pump unit according to claim 1, characterized in that: The adjusting rod (3) is sleeved in the main shaft (2); the left end of the adjusting rod (3) is movably fixed to the inner hole of the connecting shaft (201) at the left end of the main shaft (2) through the copper sleeve (4); and the right end of the adjusting rod (3) is movably fixed to the inner hole of the connecting flange b (202) at the right end of the main shaft (2) through the copper sleeve (4).

6. The internal oil supply blade angle adjuster of a horizontal water pump unit according to claim 3, characterized in that: The permanent magnet drive motor (109), the continuously variable speed and frequency conversion module (1010), the internal meshing volute injection pump (1011), the safety valve (1012), the conversion valve (1013) and the hydraulic locking valve (1014) are electrically connected to the collector ring (1016).

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