Water turbine servomotor self-adjusting device

Abstract

The utility model discloses a self-adjusting device for a hydraulic turbine servomotor. The self-adjusting device comprises a piston rod joint and a pin, a step through hole is formed in the middle of the piston rod connector, a lining is installed in the middle of the step through hole, and a detachable gland is installed on the top of the step through hole. A ball bearing is mounted in the middle of the bushing; the pin is connected with the step through hole, and the ball bearing can be rotationally adjusted in the lining along the pin. Abnormal stress borne by the water guide mechanism is reduced, the abrasion speed is reduced, loosening or damage is avoided, the overall service life is prolonged, the structure is simple, easy to disassemble and assemble and convenient to maintain and overhaul, meanwhile, key components such as the ball bearing and the lining can be replaced, the maintainability and economical efficiency of equipment are improved, and the service life of the water guide mechanism is prolonged. The self-adjusting function enhances the capacity of the water turbine to adapt to different working environments and condition changes, and more reliable technical support is provided for hydroelectric generation.

Description

Technical Field

[0001] This utility model relates to the field of water turbine technology, specifically to a self-adjusting device for a water turbine relay. Background Technology

[0002] A power transfer device is used in hydraulic control systems to transmit force and motion. It uses the pressure of a fluid (usually oil) to drive a piston, which in turn moves a pin, thereby achieving position control or force output of mechanical components. Power transfer devices are widely used in various applications requiring precise control of force and displacement, such as industrial automation, construction machinery, shipbuilding, aviation, and hydroelectric power plants.

[0003] In a water turbine, the servo drive plays a crucial role, primarily connecting the control loop and then controlling and adjusting parameters such as the turbine's guide vane opening and propeller angle, thereby affecting the speed and direction of water flow through the turbine. Traditionally, the servo drive's piston rod joint is welded to a single pin, with a copper-based bearing embedded within the joint. The control loop is directly connected to the servo drive joint by the pin, transmitting the servo drive's operating force. This structure requires a high degree of horizontality in the servo drive pin's movement; otherwise, the control loop will experience an imbalance of forces, causing it to bounce upwards (float). This directly affects the balance of the guide vane mechanism, leading to long-term uneven forces, accelerated wear, loosening, or even damage, severely impacting the safe and stable operation of the turbine's guide vane mechanism. Utility Model Content

[0004] To address the shortcomings of traditional turbine relays, such as unbalanced force leading to imbalance in the water guiding mechanism, rapid wear, and easy loosening and damage, this invention provides a simple, automatically floating, and reliable self-adjusting device for turbine relays.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows:

[0006] A self-adjusting device for a turbine relay includes a piston rod joint and a pin; the piston rod joint has a stepped through hole in the middle, a bushing is installed in the middle of the stepped through hole, and a removable pressure cap is installed on the top; a ball bearing is installed in the middle of the bushing; the pin passes through the pressure cap and the ball bearing in sequence to connect with the stepped through hole, and the ball bearing rotates and adjusts in the bushing.

[0007] Furthermore, the top of the stepped through hole is uniformly provided with several threaded holes along the central ring; the pressure cap is uniformly provided with several countersunk screw holes at the corresponding positions of the threaded holes, and countersunk screws are threaded onto the countersunk screw holes; the countersunk screws pass through the pressure cap and connect to the threaded holes, completing the connection between the pressure cap and the piston rod joint. The pressure cap and piston rod joint are fixedly connected by countersunk screws, ensuring a stable and reliable connection. The detachable design facilitates subsequent maintenance or replacement of the relay, effectively reducing the operating cost of the relay. The evenly distributed countersunk screws can more evenly distribute the force, reducing the risk of localized stress concentration, thereby improving overall stability and operational safety.

[0008] Furthermore, there are eight threaded holes, which are evenly arranged in a ring around the center of the stepped through hole; the number of countersunk screw holes and countersunk screws corresponds to the number of threaded holes, both being eight. The eight countersunk screws in the connection enhance the connection between the gland and the piston rod joint, making the connection more stable and reliable. This not only effectively prevents loosening caused by vibration or uneven operating force, but also improves the durability of the entire structure. The uniform and stable connection reduces the possibility of component failure and extends the service life of the equipment.

[0009] Furthermore, the outer surface of the ball bearing is inlaid with a graphite-based solid lubricant. This graphite-based solid lubricant provides excellent lubrication, reduces friction between moving parts, and possesses good high-temperature and high-pressure resistance, maintaining effective lubrication even in extreme environments. This improves the reliability and service life of the relay. Since the solid lubricant is not easily lost and does not require frequent replenishment, maintenance needs are significantly reduced, simplifying the maintenance process.

[0010] How to use:

[0011] The ball bearing is pre-installed into the bushing using a cold-fitting process, and then the ball bearing and bushing are installed as a whole into the piston rod joint of the servo motor. The servo motor is connected to the connecting ring of the turbine. When the servo motor operates and transmits operating force, the ball bearing can move slightly around the bushing. It not only rotates with the pin to smoothly transmit the operating force of the servo motor, but also automatically adjusts the additional force generated by the non-horizontal movement of the servo motor, thereby maintaining the balance of the water guiding mechanism and preventing the upward bounce problem caused by the unbalanced force on the control ring. The bushing can prevent the ball bearing from moving inside the bushing when it rotates and adjusts.

[0012] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0013] 1. Compared with the traditional welded piston rod joint structure, this utility model significantly improves the stability and reliability of the system, reduces the abnormal stress on the water guide mechanism after installation, effectively reduces the wear rate, avoids loosening or damage, and thus extends the service life of the entire turbine water guide mechanism. In addition, the structure is simple and easy to disassemble and assemble, facilitating maintenance and repair. At the same time, key components such as ball bearings and bushings are replaceable, increasing the maintainability and economy of the equipment. Furthermore, its self-adjusting function enhances the turbine's ability to adapt to different working environments and conditions, providing more reliable technical support for hydropower generation.

[0014] 2. This utility model uses countersunk screws to fix the gland to the piston rod joint, ensuring a stable and reliable connection. The detachable design facilitates subsequent maintenance or replacement of the relay. The evenly distributed countersunk screws can more evenly distribute the force, reducing local stress concentration and thus improving overall stability and operational safety. The graphite-based solid lubricant embedded on the outer surface of the ball bearing provides good lubrication, reducing friction between moving parts. Furthermore, the graphite-based solid lubricant has excellent high-temperature resistance and pressure resistance, maintaining lubrication even in extreme environments, thus improving the reliability and service life of the relay. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of a self-adjusting device for a water turbine relay.

[0016] Attached image labels:

[0017] Piston rod joint—1, stepped through hole—11, pin—2, bushing—3, gland—4, ball bearing—5, countersunk screw—6, graphite-based solid lubricant—7. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings.

[0019] Example 1: A self-adjusting device for a turbine relay includes a piston rod joint 1 and a pin 2; the piston rod joint 1 has a stepped through hole 11 in the middle, a bushing 3 is installed in the middle of the stepped through hole 11, and a removable pressure cap 4 is installed on the top; a ball bearing 5 is installed in the middle of the bushing 3; the pin 2 passes through the pressure cap 4 and the ball bearing 5 in sequence to connect with the stepped through hole 11, and the ball bearing 5 can be rotated and adjusted in the bushing 3.

[0020] How to use:

[0021] The ball bearing 5 is pre-installed into the bushing 3 using a cold-fitting process, and then the ball bearing 5 and bushing 3 are installed together into the piston rod joint 1 of the servo motor. The servo motor is connected to the connecting ring of the turbine. When the servo motor operates and transmits operating force, the ball bearing 5 can move slightly around the bushing 3. It not only rotates smoothly with the pin 2 to transmit the operating force of the servo motor, but also automatically adjusts the additional force generated by the non-horizontal movement of the servo motor, thereby maintaining the balance of the water guiding mechanism and preventing the upward bounce problem caused by the unbalanced force on the control ring. The bushing 3 can prevent the ball bearing 5 from moving inside the bushing 3 when it rotates and adjusts.

[0022] Example 2: Unlike Example 1, the top of the stepped through-hole 11 has a plurality of threaded holes evenly distributed along the central ring; the pressure cap 4 has a plurality of countersunk screw holes evenly distributed at the positions corresponding to the threaded holes, and countersunk screws 6 are threaded onto the countersunk screw holes; the countersunk screws pass through the pressure cap 4 and connect to the threaded holes, completing the connection between the pressure cap 4 and the piston rod connector 1. The pressure cap 4 and piston rod connector 1 are fixedly connected by the countersunk screws 6, ensuring a stable and reliable connection. The detachable design facilitates subsequent maintenance or replacement of the relay, effectively reducing the operating cost of the relay. The evenly distributed countersunk screws 6 can more evenly distribute the force, reducing the risk of local stress concentration, thereby improving overall stability and operational safety.

[0023] The outer surface of the ball bearing 5 is inlaid with graphite-based solid lubricant 7. The graphite-based solid lubricant 7 inlaid on the outer surface of the ball bearing 5 provides excellent lubrication, reduces friction between moving parts, and has good high-temperature resistance and pressure resistance properties, maintaining effective lubrication even in extreme environments. This improves the reliability and service life of the relay. Since the solid lubricant is not easily lost and does not require frequent replenishment, maintenance needs are greatly reduced, simplifying the maintenance process.

[0024] Example 3: Unlike Example 2, this example features eight threaded holes arranged in a ring around the center of the stepped through-hole 11. The number of countersunk screw holes and countersunk screws 6 corresponds to the number of threaded holes, both being eight. The eight countersunk screws 6, used for connection, enhance the connection between the gland 4 and the piston rod connector 1, making the connection more stable and reliable. This not only effectively prevents loosening due to vibration or uneven operating force but also improves the overall durability of the structure. The uniform and stable connection reduces the possibility of component failure and extends the service life of the equipment.

[0025] Numerous specific details are set forth in this specification. However, it will be understood that embodiments of this invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A hydro-turbine servomotor self-adjusting device, characterized by: It include piston rod joint (1) and pin (2), the piston rod joint (1) middle is equipped with step through-hole (11), step through-hole (11) middle installation bushing (3), top installation detachable gland (4), bushing (3) middle installation ball bearing (5), pin (2) pass through gland (4) and ball bearing (5) sequentially with step through-hole (11) connection, and ball bearing (5) can rotate adjustment in bushing (3), step through-hole (11) top along the center ring even be equipped with several thread holes, the gland (4) corresponding thread hole position even be equipped with several countersunk hole, and countersunk hole is connected with countersunk screw (6) on thread, the countersunk screw passes through gland (4) and is connected with thread hole, completes the connection of gland (4) and piston rod joint (1), the number of thread hole is eight, eight thread holes are evenly arranged along the center of step through-hole (11) ring, the number of countersunk hole and countersunk screw (6) corresponds with the number of thread hole, and all are eight, the outer surface of ball bearing (5) is embedded with graphite-based solid lubricant (7).

Images