Equivalent simulation block

Abstract

The utility model belongs to the technical field of couplings, and particularly relates to an equivalent simulation block which is mounted on a rotor of a steam turbine unit, a rotating shaft of the rotor is a conical shaft, and the equivalent simulation block is characterized by comprising a columnar body, and a conical hole in interference fit with the conical shaft is formed in the body; a circle of protrusion is arranged on the periphery of the left side of the body, and hoisting holes and counterweight holes are formed in the right side end face of the protrusion in a staggered mode. According to the scheme, the body is of an integral single-piece structure, and compared with a split multi-piece connecting structure connected through bolts, accumulative data errors caused by machining errors and assembly errors of all parts are reduced technologically; and the equivalent simulation block replacement can reflect related parameters of the coupling more truly and accurately, so that data participating in dynamic balance of the rotor are more accurate.

Description

Technical Field

[0001] The utility model belongs to the technical field of couplings, and in particular relates to an equivalent simulation block. Background Art

[0002] A coupling is a mechanical device that connects two shafts, or a shaft and a rotating part, transmitting motion and torque so that they rotate together without disengaging. It is an indispensable connecting component in mechanical transmission shaft systems and comes in many varieties, with large usage and a wide range of applications. It is a universal basic transmission component. There are many types of couplings, including rigid couplings, flexible couplings, elastic couplings, and safety couplings. Their basic function is to transmit motion and torque. However, depending on the type of coupling, in addition to the basic function, other auxiliary functions are also provided, such as compensation for axial, radial, and angular displacement, as well as varying degrees of vibration reduction, buffering, and overload safety protection, to meet the needs of different mechanical equipment transmission systems. Different classification methods are used based on the location and connection location of the coupling.

[0003] The coupling plays a role in transmitting torque in the entire system, and also has a safety function. When a major problem occurs in the system, such as vibration, axial transmission, or severe power overload, the coupling will fail first and disconnect, thereby protecting the entire system.

[0004] The entire system's commissioning isn't a one-shot process. First, each segment and individual component must be tested individually. Only after each component meets operational standards can the entire system be commissioned. Couplings connect the segments within the overall system. Therefore, each segment must be tested with a single, simulated block of varying specifications.

[0005] The equivalent simulation block is installed on the rotor in place of the coupling and participates in rotor dynamic balancing. The closer the center of mass position and mass of the equivalent simulation block match the coupling values, the more realistic the test results. If test data exceeds the standard, individual components can be repaired to meet operating standards, reducing the probability of overall test failure. Utility Model Content

[0006] In order to solve the above technical problems, the utility model provides an equivalent simulation block, which is installed on the rotor of a steam turbine unit. The rotating shaft of the rotor is a tapered shaft, including a cylindrical body, and a tapered hole that is interference fit with the tapered shaft is provided inside the body; the left outer periphery of the body has a circle of protrusions, and the right end face of the protrusion is staggered with lifting holes and counterweight holes.

[0007] Furthermore, the outer circle size of the tapered hole is designed in sections.

[0008] Furthermore, a handle hole is provided on the rightmost end face of the body.

[0009] Further, the interference amount of the equivalent taper hole and the taper shaft is 2 ‰.

[0010] Further, the lifting hole is a threaded hole, and a screw rod is screwed in the threaded hole.

[0011] Further, the counterweight holes are arranged in an annular section, and the counterweight holes are threaded holes.

[0012] The advantages of the utility model lie in that the body is a single-piece structure as a whole, compared with a multi-piece connection structure connected by bolts, cumulative data errors caused by machining errors and assembly errors of each part are reduced in the process; the equivalent simulation block can more truly and accurately reflect the related parameters of the coupling, so that the data after participating in the rotor dynamic balance is more accurate. BRIEF DESCRIPTION OF DRAWINGS

[0013] Fig. 1 is the structural diagram of the utility model;

[0014] Fig. 2 is a schematic view of the taper hole.

[0015] 1, body; 2, taper hole; 3, protrusion; 4, counterweight hole; 5, clamping hole. DETAILED DESCRIPTION

[0016] The principles and characteristics of the utility model are described below in combination with the drawings, and the examples are only used to explain the utility model and not to limit the scope of the utility model.

[0017] Reference Figs. 1-2 The utility model provides a kind of equivalent simulation block, installs on the rotor of steam turbine unit on the rotating shaft, the rotating shaft is taper shaft, including cylindrical body 1, the body 1 inside is provided with the taper hole 2 of interference fit with taper shaft;The outer periphery of body left side has a circle of protrusion, the protrusion 3 has the maximum outer circle of body, staggered setting is hoisted hole and counterweight hole 4 on the right side end face of protrusion;Wherein, 12-M6 counterweight hole, i.e. dynamic balance hole, is increased on the circumference close to maximum outer circle, and is used to on-site weight balance, it is more convenient to use.The length of equivalent simulation block and the length of inner hole of coupling are kept consistent.By changing the shape of the equivalent simulation block, the center of gravity position and the weight are adjusted to simulate the center of gravity position and the weight of the coupling.Under the working condition of coupling, trial operation is carried out, and the experimental condition is intuitively reflected.

[0018] As an improvement of the scheme, the outer circle size is designed in sections, and by changing the weight distribution of each section, the center of gravity position can be shifted to the left side or the right side, so that the ideal position is achieved.

[0019] As an improvement of the scheme, clamping hole 5 is provided on the rightmost end face of the body.

[0020] As the improvement of the scheme, the lifting hole is a threaded hole, and a screw rod is screwed in the threaded hole, and a sleeve ring is arranged at the end of the screw rod, and the sleeve ring is used for lifting.

[0021] As the improvement of the scheme, the interference of the taper hole is 2‰, and the interference requirement in the API671 standard is 2.5‰, the equivalent axial pushing amount is reduced compared with the coupling, and the installation oil pressure value is reduced, and the installation is relatively easy. In some special designs, for example, when the equivalent wall thickness is large, the oil pressure is too high to be considered for installation, the interference can be reduced, the pushing amount is synchronously reduced, and the high oil pressure value for installation is reduced.

[0022] The interference is calculated according to 2 ‰, and the interference requirement in the API671 standard is 2.5‰. Because no large torque is borne, it is unnecessary to be designed according to two and a half tenths of a percent. The equivalent inner hole size is slightly increased, the length remains unchanged, the shape size is adjusted, the equivalent center of gravity position and the center of gravity mass are ensured to be completely consistent with the parameters on the coupling. After the interference is calculated according to 2 ‰, the inner hole size is slightly increased, the equivalent axial pushing amount is reduced compared with the coupling, and the installation oil pressure value is reduced, and the installation is relatively easy. After negotiation with the user side and actual test, the theory has been verified and actually put into use.

[0023] The above only describes the preferred embodiments of the utility model, and does not limit the utility model, and any modification, equivalent replacement, improvement, etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. An equivalent simulation block mounted on a rotor of a steam turbine unit, the rotor having a conical shaft, characterized in that: The application relates to a lifting device, which comprises a columnar body, a taper hole in the body, an excess fit of the taper hole and a taper shaft, a circle of protrusions on the left side of the body, staggered lifting holes and counterweight holes on the right side end surface of the protrusions.

2. An equivalent analog block as claimed in claim 1, characterized in that, The outer diameter of the taper hole is designed in sections.

3. An equivalent analog block as claimed in claim 1, characterized in that, A handle hole is arranged on the rightmost end surface of the body.

4. An equivalent analog block as claimed in claim 1, characterized in that, The excess fit of the taper hole and the taper shaft is 2%.

5. An equivalent analog block as claimed in claim 1, characterized in that, The lifting hole is a threaded hole, a screw rod is screwed in the threaded hole, a sleeve ring is arranged at the end of the screw rod, and the sleeve ring is used for lifting.

6. An equivalent analog block as claimed in claim 1, characterized in that, The counterweight holes are annular and arranged in sections, and the counterweight holes are threaded holes.

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