Adjusting mechanism and servomotor locking device

Abstract

The utility model relates to the technical field of servomotor locking, in particular to a locking device of an adjusting mechanism and a servomotor, which comprises a hydraulic relay unit comprising a relay oil cylinder and a hydraulic push rod arranged on the relay oil cylinder in a sliding manner; and the adjusting unit comprises a fixed base arranged on the relay oil cylinder, a fixed ring movably arranged on the fixed base, a displacement assembly arranged on the fixed ring and an adjusting rod assembly arranged on the displacement assembly. The adjusting mechanism solves the problem that the applicability of an existing fixed connecting rod in different hydraulic structures or operation environments is limited due to the fact that the existing fixed connecting rod cannot adapt to the needed length and angle changes. Meanwhile, the servomotor locking device solves the problems that an existing hydraulic system can only vertically lock the servomotor and lacks locking and adjusting capacity in the horizontal direction, and the flexibility and the application range of the locking device are limited.

Description

Technical Field

[0001] The utility model relates to the technical field of servomotor locking, in particular to an adjusting mechanism and a servomotor locking device. Background Art

[0002] A turbine servomotor is a hydraulic actuator used to control the water inlet of a turbine. It controls the amount of water entering the turbine by adjusting the opening of the guide vanes or needle valves, thereby controlling the output power of the turbine.

[0003] The locking device of the turbine servomotor is an important component of the turbine system. Its function is to lock the unit after it is shut down and the guide vanes are fully closed to prevent the guide vanes from opening due to malfunction, thereby ensuring the safety of the hydropower plant equipment and personnel. The existing locking method is to lock the servomotor in the vertical direction by controlling the hydraulic system to adjust the fixed-size locking block based on the data information on the connecting rod displacement sensor on the hydraulic rod of the servomotor.

[0004] However, the applicability of existing fixed connecting rods in different hydraulic structures or operating environments is limited because they cannot adapt to the required length and angle changes; in addition, during unit maintenance, the existing hydraulic system can only lock the relay vertically and lacks the ability to lock and adjust in the horizontal direction, which limits the flexibility and scope of application of the locking device. Utility Model Content

[0005] The purpose of this section is to summarize some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and utility model name of this application to avoid blurring the purpose of this section, specification abstract and utility model name, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0006] In view of the problem in the above-mentioned prior art that the existing fixed connecting rod cannot adapt to the required length and angle changes, resulting in limited applicability in different hydraulic structures or operating environments, the present utility model is proposed.

[0007] Therefore, the utility model aims to provide an adjustment mechanism, which aims to solve the problem that the existing fixed connecting rods are unable to adapt to the required length and angle changes, resulting in limited applicability in different hydraulic structures or operating environments.

[0008] In order to solve the above technical problems, the utility model provides the following technical solutions: an adjustment mechanism, comprising a hydraulic relay unit, comprising a relay cylinder, and a hydraulic push rod slidably arranged on the relay cylinder; and

[0009] The adjusting unit comprises a fixed base arranged on the relay oil cylinder, a fixed ring movably arranged on the fixed base, a displacement component arranged on the fixed ring, and an adjusting rod component arranged on the displacement component.

[0010] As a preferred solution of the adjustment mechanism described in the utility model, the displacement assembly includes a positioning ring movably arranged on the relay cylinder, a positioning base arranged on the positioning ring, a hydraulic cylinder arranged on the positioning base, a displacement rod slidably arranged on the hydraulic cylinder, and a circular gear arranged at one end of the displacement rod.

[0011] As a preferred solution of the adjustment mechanism described in the utility model, wherein: the hydraulic cylinder is provided with a rack 1 meshing with the circular gear, the circular gear is meshed with a rack 2, the rack 2 is provided with a support plate, and the support plate is provided with a groove.

[0012] As a preferred solution of the adjustment mechanism described in the utility model, wherein: a bar track is arranged on the hydraulic cylinder, a guide rail groove is arranged on the bar track, a slider is slidably arranged on the guide rail groove, and the support plate is arranged on the slider.

[0013] As a preferred solution of the adjustment mechanism described in the utility model, the adjustment rod assembly includes an adjustment plate movably arranged on the groove, an adjustment rod 1 movably arranged on the adjustment plate, a positioning sleeve movably arranged on the adjustment rod 1, and an adjustment rod 2 movably arranged on the positioning sleeve, and the diameter of the adjustment rod 2 is larger than the diameter of the adjustment rod 1.

[0014] The beneficial effects of the utility model are as follows: through the cooperation of the adjusting rod assembly and the displacement assembly, the position of the adjusting rod can be controlled to adapt to the requirements of different lengths and angles, thereby solving the problem that the existing fixed connecting rod is limited in applicability in different hydraulic structures or operating environments because it cannot adapt to the required length and angle changes.

[0015] In view of the problem that the existing hydraulic system in the above-mentioned prior art can only lock the relay vertically and lacks the locking and adjustment capabilities in the horizontal direction, which limits the flexibility and application scope of the locking device, the present utility model is proposed.

[0016] Therefore, the utility model aims to provide a locking device for a servomotor, which aims to solve the problem that the existing hydraulic system can only lock the servomotor vertically, lacks the locking and adjustment capabilities in the horizontal direction, and limits the flexibility and application scope of the locking device.

[0017] As a preferred solution of the locking device of the servomotor of the utility model, the locking device of the servomotor comprises a displacement measuring unit, comprising a displacement sensor arranged on the relay cylinder; and

[0018] The locking unit comprises a limit plate arranged on one side of the hydraulic push rod, a limit groove arranged on the limit plate, a locking block slidably arranged on the limit groove, and a solenoid valve assembly arranged on the locking block.

[0019] As a preferred solution of the locking device of the relay described in the utility model, the solenoid valve assembly includes a locking and retracting piston arranged on the locking block, a locking and retracting cylinder slidably arranged on the locking and retracting piston, and an oil pipe 1 arranged on the locking and retracting cylinder.

[0020] As a preferred solution of the locking device of the relay described in the utility model, the solenoid valve assembly also includes a connecting plate arranged on the locking block, a locking block telescopic rod arranged on the connecting plate, a locking block telescopic cylinder slidably arranged on the locking block telescopic rod, a control box arranged on the locking block telescopic cylinder, and an oil pipe 2 arranged on the control box.

[0021] As a preferred solution of the locking device of the relay described in the utility model, one end of the oil pipe 2 is provided with a locking telescopic solenoid valve, and one end of the oil pipe 1 is provided with a locking throwing and retracting solenoid valve.

[0022] As a preferred solution of the locking device of the relay described in the utility model, wherein: a hydraulic structure is arranged on one side of the locking telescopic solenoid valve, and the hydraulic structure is arranged on the hydraulic push rod.

[0023] The beneficial effects of the utility model are as follows: through the cooperation of the displacement measuring unit and the locking unit, the servomotor device can be locked at any position, and when the equipment is shut down for maintenance, safe and reliable working conditions are provided for the staff, thereby solving the problem that the existing hydraulic system can only lock the servomotor vertically, lacks the locking and adjustment capabilities in the horizontal direction, and limits the flexibility and application scope of the locking device. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following briefly introduces the drawings required for the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0025] Figure 1The utility model is a schematic diagram of the overall structure of an adjusting mechanism.

[0026] Figure 2 for Figure 1 Enlarged schematic diagram at point A in the middle.

[0027] Figure 3 for Figure 1 Enlarged schematic diagram of point B in the middle.

[0028] Figure 4 The utility model is a schematic diagram of the structure of an adjusting unit of an adjusting mechanism.

[0029] Figure 5 The utility model is a schematic diagram of the locking unit structure of the locking device of a relay.

[0030] Figure 6 The utility model is a schematic diagram of the overall structure of an adjusting mechanism and a locking device of a servomotor. DETAILED DESCRIPTION

[0031] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0032] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0033] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0034] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0035] Example 1

[0036] Reference Figure 1-Figure 4, which is the first embodiment of the utility model, provides an adjustment mechanism, the device includes a hydraulic relay unit 100, including a relay cylinder 101, and a hydraulic push rod 102 slidably disposed on the relay cylinder 101; and,

[0037] The adjusting unit 200 includes a fixed base 201 disposed on the relay cylinder 101 , a fixed ring 202 movably disposed on the fixed base 201 , a displacement assembly 203 disposed on the fixed ring 202 , and an adjusting rod assembly 204 disposed on the displacement assembly 203 .

[0038] Among them, the displacement component 203 includes a positioning ring 203a movably arranged on the relay cylinder 101, a positioning base 203b arranged on the positioning ring 203a, a hydraulic cylinder 203c arranged on the positioning base 203b, a displacement rod 203d slidably arranged on the hydraulic cylinder 203c, and a circular gear 203e arranged at one end of the displacement rod 203d.

[0039] The hydraulic cylinder 203c is provided with a rack 1 203f meshing with the circular gear 203e, the circular gear 203e is meshing with a rack 203g, the rack 203g is provided with a support plate 203h, and the support plate 203h is provided with a groove 203i.

[0040] The hydraulic cylinder 203c is provided with a bar track 203j, the bar track 203j is provided with a guide rail groove 203k, a slider 203l is slidably provided on the guide rail groove 203k, and a support plate 203h is provided on the slider 203l.

[0041] During use, the operator will first connect the adjusting rod 204d in the adjusting rod assembly 204 to the hydraulic structure 500. During the installation process, the operator can adjust the fixing ring 202 on the fixing base 201 at different installation angles of the hydraulic structure 500 according to the adjusting rod 204d, thereby driving the positioning ring 203a and the positioning base 203b on one side of the fixing ring 202 to rotate, and then driving the entire displacement assembly 203 to rotate on the surface of the relay cylinder 101, thereby adjusting the installation angle of the entire adjusting rod assembly 204.

[0042] During the operation of the hydraulic relay unit 100, the hydraulic push rod 102 slides in the relay cylinder 101, thereby driving the hydraulic structure 500 to slide the same distance as the hydraulic push rod 102 under the movement of the hydraulic push rod 102. The hydraulic structure 500 will drive the movement of the adjusting rod assembly 204, and the adjusting assembly will drive the support plate 203h to move on the circular gear 203e. The connection between the circular gear 203e and the displacement rod 203d is a sliding connection. The rack 203g on the support plate 203h drives the circular gear 203e to move on the tooth plate 1, thereby driving the displacement rod 203d to move on the hydraulic rod. The displacement sensor 301 on the hydraulic cylinder 203c will record and save the data of the movement of the displacement rod 203d, and transmit these data to the locking telescopic solenoid valve 404h and the locking throwing and retracting solenoid valve 404i.

[0043] This design skill satisfies the detection and feedback of the displacement data of the adjusting rod assembly 204, and the operator can adjust the entire displacement assembly 203 according to the installation angle of the adjusting rod 204d in different hydraulic structures 500, thereby solving the problem that the existing fixed connecting rod is unable to adapt to the required angle changes, resulting in limited applicability in different hydraulic structures 500 or operating environments.

[0044] Example 2

[0045] Reference Figure 1-Figure 2 , which is the second embodiment of the utility model. This embodiment is different from the first embodiment in that: the adjusting rod assembly 204 includes an adjusting plate 204a movably arranged on the groove 203i, an adjusting rod 1 204b movably arranged on the adjusting plate 204a, a positioning sleeve 204c movably arranged on the adjusting rod 1 204b, and an adjusting rod 2 204d movably arranged on the positioning sleeve 204c.

[0046] Compared with the first embodiment, further, the diameter of the second adjusting rod 204d is larger than the diameter of the first adjusting rod 204b.

[0047] During use, the operator will first connect the adjusting rod 204d in the adjusting rod assembly 204 to the hydraulic structure 500. During the installation process, the operator can adjust the fixing ring 202 on the fixing base 201 at different installation angles of the hydraulic structure 500 according to the adjusting rod 204d, thereby driving the positioning ring 203a and the positioning base 203b on one side of the fixing ring 202 to rotate, and then driving the entire displacement assembly 203 to rotate on the surface of the relay cylinder 101, thereby adjusting the installation angle of the entire adjusting rod assembly 204. After the installation angle is adjusted, adjust the fastening bolts on the positioning sleeve 204c, and adjust the length between the adjusting rod 1 204b and the adjusting rod 2 204d. Since the diameter of the adjusting rod 204d is larger than the diameter of the adjusting rod 1 204b, the adjusting rod 1 204b can be extended and retracted on the adjusting rod 204d. When the displacement rod 203d does not move, adjust the connection distance between the adjusting rod 204d and the hydraulic structure 500.

[0048] Moreover, during the installation process, when the operator adjusts the adjusting rod 204d, the adjusting plate 204a in the groove 203i on the support plate 203h and the support rod 1 are rotatably connected. At this time, the angle can be adjusted during the installation of the adjusting rod 204d, which will solve the problem of limited applicability of the fixed connecting rod in different hydraulic structures 500 or operating environments due to its inability to adapt to the required angle and length changes.

[0049] The remaining structures are the same as those of Example 1.

[0050] Example 3

[0051] Reference Figure 1-Figure 6 , which is the third embodiment of the utility model, and this embodiment is different from the second embodiment in that: the locking device of the relay includes a displacement measuring unit 300, including a displacement sensor 301 arranged on the relay cylinder 101; and

[0052] The locking unit 400 includes a limiting plate 401 disposed on one side of the hydraulic push rod 102 , a limiting groove 402 disposed on the limiting plate 401 , a locking block 403 slidably disposed on the limiting groove 402 , and a solenoid valve assembly 404 disposed on the locking block 403 .

[0053] Compared with Example 2, the solenoid valve assembly 404 further includes a locking and retracting piston 404a arranged on the locking block 403, a locking and retracting cylinder 404b slidably arranged on the locking and retracting piston 404a, and an oil pipe 404c arranged on the locking and retracting cylinder 404b.

[0054] Among them, the solenoid valve assembly 404 also includes a connecting plate 404j arranged on the locking block 403, a locking block telescopic rod 404d arranged on the connecting plate 404j, a locking block telescopic cylinder 404e slidingly arranged on the locking block telescopic rod 404d, a control box 404f arranged on the locking block telescopic cylinder 404e, and an oil pipe 404g arranged on the control box 404f.

[0055] Among them, a locking and retracting electromagnetic valve 404h is provided at one end of the oil pipe 404g, and a locking and retracting electromagnetic valve 404i is provided at one end of the oil pipe 404c.

[0056] A hydraulic structure 500 is disposed on one side of the locking telescopic solenoid valve 404 h , and the hydraulic structure 500 is disposed on the hydraulic push rod 102 .

[0057] During use, the relay cylinder 101 is arranged on both sides of the control ring of the waterwheel chamber of the turbine unit, one on each side. During normal operation, the relays on both sides pull on one side and push on the other side to operate the guide vane pair. The relay cylinders 101 on both sides are connected to the hydraulic structure 500 through a metal connecting frame. The metal connecting frame is a frame structure, and the locking block 403 can be operated to move up and down and forward and backward inside it. During the movement of the hydraulic push rod 102 on the relay, the adjustment rod 204d moves together with the hydraulic push rod 102. The displacement sensor 301 is used to monitor the displacement of the displacement rod 203d to monitor the position of the hydraulic push rod 102. The displacement signal controls the action of the locking telescopic solenoid valve 404h, thereby controlling the position of the locking telescopic rod in the locking block telescopic cylinder 404e, and at the same time controls the locking throwing and retreating solenoid valve 404i, thereby realizing accurate locking of the relay at any position to prevent the guide vane from malfunctioning.

[0058] By means of hydraulic system control, two hydraulic pistons are arranged on both sides of the metal connection frame, which are respectively connected to the two sides of the upper end of the locking block 403. The oil pipe 404c and the locking and retracting solenoid valve 404i are used to control whether the upper and lower chambers of the two locking and retracting pistons 404a are filled with oil or discharged with oil, so as to realize the up and down lifting of the locking block 403. The locking and retracting solenoid valve 404i receives the control of the operation instruction. When the locking and retracting solenoid valve 404i works in the lower position, the locking is put in, and when it works in the upper position, the locking is pulled out.

[0059] The operation of the locking and retracting solenoid valve 404i is controlled by the displacement sensor 301. When the servomotor is fully closed, only one side can be locked and put into operation. Therefore, the locking and retracting solenoid valve 404i can only be activated when the displacement of the servomotor meets the locking and putting conditions. At the same time, the displacement of the servomotor controls the locking and retracting solenoid valve 404h. Different positions represent the lengths of the locking that should be put into and retracted. By controlling the locking and retracting solenoid valve 404h to control the on-off of the oil circuit of the retracting chamber, locking at different positions can be achieved.

[0060] The locking and telescopic system utilizes hydraulic drive to extend and retract the locking block, so that the locking block can change its length arbitrarily, but the required length is controlled by the relay displacement sensor 301. A limit plate 401 is also provided in the locking block 403 to fix the locking block 403. A telescopic piston is provided inside the locking block 403 to facilitate the change of the locking length. A pressure sensor is provided at the end of the locking block 403 to collect the pressure exerted on the locking block. The pressure sensor participates in the control of the locking and telescopic solenoid valve 404h.

[0061] The hydraulic system connects the two control boxes 404f and the lock block telescopic cylinder 404e of the lock block 403 through the locking and telescopic solenoid valve 404h, collects the data recorded on the relay position sensor, calculates and processes the output of the required locking length, cooperates with the pressure sensor at the end of the lock block 403, comprehensively analyzes the running direction of the lock block 403, and then controls the locking and telescopic solenoid valve 404h to achieve telescopic control of the lock block 403; when the locking and telescopic solenoid valve 404h works in the lower position, the lock block 403 is compressed, and when the locking and telescopic solenoid valve 404h works in the upper position, the lock block 403 is pulled up.

[0062] The locking device can lock the servomotor at any position, thereby preventing the servomotor from running. Therefore, the locking device needs to be arranged on the servomotors on both sides.

[0063] The remaining structure is the same as that of Example 2.

[0064] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. An adjustment mechanism, characterized in that: include, A hydraulic relay unit (100) comprises a relay cylinder (101) and a hydraulic push rod (102) slidably disposed on the relay cylinder (101); and, The adjustment unit (200) comprises a fixed base (201) arranged on the relay cylinder (101), a fixed ring (202) movably arranged on the fixed base (201), a displacement assembly (203) arranged on the fixed ring (202), and an adjustment rod assembly (204) arranged on the displacement assembly (203).

2. The adjustment mechanism according to claim 1, characterized in that: The displacement assembly (203) comprises a positioning ring (203a) movably arranged on the relay cylinder (101), a positioning base (203b) arranged on the positioning ring (203a), a hydraulic cylinder (203c) arranged on the positioning base (203b), a displacement rod (203d) slidably arranged on the hydraulic cylinder (203c), and a circular gear (203e) arranged at one end of the displacement rod (203d).

3. The adjustment mechanism according to claim 2, characterized in that: The hydraulic cylinder (203c) is provided with a rack 1 (203f) meshing with the circular gear (203e), the circular gear (203e) is meshing with a rack 2 (203g), the rack 2 (203g) is provided with a support plate (203h), and the support plate (203h) is provided with a groove (203i).

4. The adjustment mechanism according to claim 3, characterized in that: The hydraulic cylinder (203c) is provided with a bar track (203j), the bar track (203j) is provided with a guide rail groove (203k), a slider (203l) is slidably provided on the guide rail groove (203k), and the support plate (203h) is provided on the slider (203l).

5. The adjustment mechanism according to claim 4, characterized in that: The adjusting rod assembly (204) comprises an adjusting plate (204a) movably arranged on the groove (203i), an adjusting rod 1 (204b) movably arranged on the adjusting plate (204a), a positioning sleeve (204c) movably arranged on the adjusting rod 1 (204b), and an adjusting rod 2 (204d) movably arranged on the positioning sleeve (204c), wherein the diameter of the adjusting rod 2 (204d) is greater than the diameter of the adjusting rod 1 (204b).

6. A locking device for a servomotor, characterized in that: The adjusting mechanism comprises any one of claims 1 to 5, and further comprises: A displacement measuring unit (300), comprising a displacement sensor (301) arranged on the relay cylinder (101); as well as, The locking unit (400) comprises a limit plate (401) arranged on one side of the hydraulic push rod (102), a limit groove (402) arranged on the limit plate (401), a locking block (403) slidably arranged on the limit groove (402), and a solenoid valve assembly (404) arranged on the locking block (403).

7. The locking device of the servomotor according to claim 6, characterized in that: The solenoid valve assembly (404) comprises a locking and retracting piston (404a) arranged on the locking block (403), a locking and retracting oil cylinder (404b) slidably arranged on the locking and retracting piston (404a), and an oil pipe (404c) arranged on the locking and retracting oil cylinder (404b).

8. The locking device of the relay according to claim 7, characterized in that: The solenoid valve assembly (404) further includes a connecting plate (404j) arranged on the locking block (403), a locking block telescopic rod (404d) arranged on the connecting plate (404j), a locking block telescopic oil cylinder (404e) slidably arranged on the locking block telescopic rod (404d), a control box (404f) arranged on the locking block telescopic oil cylinder (404e), and an oil pipe 2 (404g) arranged on the control box (404f).

9. The locking device of the servomotor according to claim 8, characterized in that: One end of the oil pipe 2 (404g) is provided with a locking telescopic solenoid valve (404h), and one end of the oil pipe 1 (404c) is provided with a locking insertion and retraction solenoid valve (404i).

10. The locking device of the servomotor according to claim 9, characterized in that: A hydraulic structure (500) is arranged on one side of the locking and telescopic solenoid valve (404h), and the hydraulic structure (500) is arranged on the hydraulic push rod (102).

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