CN213213262U

CN213213262U - Driving system for variable speed load

Info

Publication number: CN213213262U
Application number: CN202021902103.4U
Authority: CN
Inventors: 刘学成; 石佳欣; 赵志辉; 郭贝; 王建军; 高显峰; 王志兴; 孙善良; 王言森; 曹林聚; 孟文舒
Original assignee: Heze Hengxun Environmental Protection Technology Co Ltd
Current assignee: Heze Hengxun Environmental Protection Technology Co Ltd
Priority date: 2020-09-03
Filing date: 2020-09-03
Publication date: 2021-05-14
Anticipated expiration: 2030-09-03

Abstract

The utility model relates to the technical field of motors, in particular to a driving system for variable speed load, which comprises a load, a turbine, an automatic clutch and a motor; the system also comprises a motor control system for controlling the operation of the motor and a turbine control system for controlling the operation of the turbine; the load is an F-shaped double-extension shaft load; the extending ends on two sides of the load are in transmission connection with the motor and the turbine through an automatic clutch respectively; the motor control system is in control connection with the motor; the turbine control system is in control connection with the turbine; compared with the traditional driving mode, the device has stronger applicability and higher efficiency; the defects that the variable speed operation cannot be realized and the system consumes more useless power during the variable speed operation in the existing scheme are overcome, and the method is simple to operate and small in maintenance amount.

Description

Driving system for variable speed load

Technical Field

The utility model relates to the technical field of electric machines, especially, relate to a actuating system for variable speed load.

Background

The prior art is mostly used for dragging constant speed equipment, a motor is designed as a double-extension shaft, and a power frequency motor is mostly adopted as the motor. The structure is shown in figure 1, when no steam or little steam is available, the motor is adopted for dragging, and when the steam meets the load requirement, the motor is powered off. The defects of the scheme are that the load can not operate at a speed regulation mode, and the motor idles when steam is independently dragged, so that the consumption of idle work is improved.

When the speed change device is dragged, the layout and the positions of all parts are as shown in figure 1, the motor and the turbine still run at a constant speed, and when the speed is required to be adjusted, the speed is adjusted through the hydraulic coupler. Although the scheme can play a role in speed regulation, the energy utilization efficiency is low, and the operation cost and the failure rate are improved by the hydraulic coupler. This solution is less applicable and the market is also lacking an efficient solution for variable speed regulation.

To solve the above problems, a drive system for a variable speed load is proposed in the present application.

SUMMERY OF THE UTILITY MODEL

Objects of the invention

In order to solve the technical problems existing in the background technology, the utility model provides a driving system for variable speed load, which has the same traditional driving form, stronger applicability and higher efficiency; the defects that the variable speed operation cannot be realized and the system consumes more useless power during the variable speed operation in the existing scheme are overcome, and the method has the characteristics of simplicity in operation and less maintenance amount.

(II) technical scheme

In order to solve the technical problem, the utility model provides a driving system for variable speed load, which comprises a load, a turbine, an automatic clutch and a motor; the system also comprises a motor control system for controlling the operation of the motor and a turbine control system for controlling the operation of the turbine;

the load is an F-shaped double-extension shaft load; the extending ends on two sides of the load are in transmission connection with the motor and the turbine through an automatic clutch respectively;

the motor control system is in control connection with the motor; and the turbine control system is connected with the turbine control.

Preferably, the turbine is a steam turbine or a screw expander.

Preferably, the motor is a three-phase asynchronous variable frequency motor or a three-phase synchronous permanent magnet motor.

Preferably, the automatic clutch is an overrunning clutch or an electromagnetic clutch.

Preferably, the load is a fan or a water pump.

The above technical scheme of the utility model has following profitable technological effect:

1. the motor and the turbine are designed with rated power as the rated power of the load, and when no steam or insufficient steam exists, the motor automatically compensates the power of the system to ensure the stable operation of the load; when steam is surplus, the turbine can stably output power to meet load requirements, the motor is changed from a power transmission state to a power failure state, and electric energy is greatly saved. Compared with the traditional driving mode, the device has stronger applicability and higher efficiency.

2. The utility model discloses effectively utilized automatic clutch's advantage, in the mode of dragging of difference, free convenient safe switching each other that carries on drive device.

3. The utility model discloses effectively utilized screw rod expander's advantage, under the condition of the quality of steam, pressure, flow change, still can satisfy the production requirement. The defects that the variable speed operation cannot be realized and the system consumes more useless power during the variable speed operation in the existing scheme are overcome, and the method has the advantages of simplicity in operation and less maintenance.

Drawings

Fig. 1 is a schematic view of a connection structure of a load in the prior art;

fig. 2 is a schematic view of the load connection structure of the present invention.

Reference numerals: 1. a load; 2. a fluid coupling; 3. a motor; 4. an automatic clutch; 5. a turbine; 6. a motor control system; 7. a turbine control system.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings. It should be understood that the description is intended to be illustrative only and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.

As shown in fig. 2, the present invention provides a driving system for variable speed load, which includes a load 1, a turbine 5, an automatic clutch 4 and a motor 3; the system also comprises a motor control system 6 for controlling the operation of the motor 3 and a turbine control system 7 for controlling the operation of the turbine 5;

the load 1 is an F-shaped double-extension-shaft load 1; the extending ends of two sides of the load 1 are respectively in transmission connection with a motor 3 and a turbine 5 through an automatic clutch 4;

the motor control system 6 is in control connection with the motor 3; the turbine control system 7 is in control connection with the turbine 5.

In an alternative embodiment, the turbine 5 is a screw expander, and the turbine control system 7 is a screw expander control system; the screw expander control system is electrically connected with the screw expander.

In an alternative embodiment, the motor 3 is a three-phase asynchronous variable frequency motor; compared with a three-phase synchronous permanent magnet motor, the three-phase asynchronous variable frequency motor has higher power; the motor control system 6 is an asynchronous motor frequency conversion system, and the asynchronous motor frequency conversion system is electrically connected with the motor 3.

In an alternative embodiment, the automatic clutch 4 is a one-way overrunning clutch.

The utility model discloses a theory of operation and use flow: double-power moment balance equation: m (steam) + M (electricity) ═ M (load). M (steam) is the output power of the turbine 5, M (electricity) is the output power of the motor 3, and M (load) is the power required by the load 1; during operation, the load of the load 1 is varied, and the steam is also varied in a fluctuating manner. When M (load) changes, the turbine 5 adjusts the opening of the valve position through the control system of the turbine so as to adjust M (steam), and when the output power is insufficient, the motor 3 adjusts the output current to adjust M (electricity), so that the three finally meet the torque balance equation. The double-power driving requirement is met; the double-power system considers the conditions that the load 1 is not allowed to stop in the operation of some working conditions or no steam is generated when the production is started, the system is provided with an overrunning clutch, the load 1 can be driven by the motor 3 to operate, and after the steam can stably output power, the turbine 5 is automatically engaged to be put into the system to operate. The utility model discloses in, motor 3 becomes the power failure state: the steam drive power completely meets the load demand; the rotating speed regulating range of the load 1 is 0-1500 r/min. The industrial turbine 5 conforms to the GB/T22073-2008 standard. In the utility model, the rated power of the motor 3 and the turbine 5 is designed to be the rated power of the load 1, and when no steam exists or the steam is insufficient, the motor 3 automatically compensates the power of the system to ensure the stable operation of the load 1; when the steam is surplus, the turbine 5 can stably output power to meet the load requirement, and the motor 3 is changed from a power transmission state to a power failure state, so that the electric energy is greatly saved. Compared with the traditional driving mode, the device has stronger applicability and higher efficiency.

The utility model discloses effectively utilized automatic clutch 4's advantage, in the mode of dragging of difference, free convenient safe switching each other that carries on drive device.

The utility model discloses effectively utilized screw rod expander's advantage, under the condition of the quality of steam, pressure, flow change, still can satisfy the production requirement. The defects that the variable speed operation cannot be realized and the system consumes more useless power during the variable speed operation in the existing scheme are overcome, and the method has the advantages of simplicity in operation and less maintenance.

It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.

Claims

1. A drive system for a variable speed load, comprising a load (1), a turbine (5), an automatic clutch (4) and an electric machine (3); the system also comprises a motor control system (6) for controlling the operation of the motor (3) and a turbine control system (7) for controlling the operation of the turbine (5);

the load (1) is an F-shaped double-extension-shaft load (1); the extending ends of two sides of the load (1) are respectively in transmission connection with the motor (3) and the turbine (5) through an automatic clutch (4);

the motor control system (6) is in control connection with the motor (3); the turbine control system (7) is in control connection with the turbine (5).

2. A drive system for variable speed loads according to claim 1, wherein the turbine (5) is a steam turbine or a screw expander.

3. A drive system for a variable speed load according to claim 1, characterized in that the electric motor (3) is a three-phase asynchronous variable frequency motor or a three-phase synchronous permanent magnet motor.

4. A drive system for a variable speed load according to claim 1, characterized in that the automatic clutch (4) is an overrunning clutch or an electromagnetic clutch.

5. A drive system for a variable speed load according to claim 1, characterized in that the load (1) is a fan or a water pump.