Double-loader double-input single-output power closed test bench

Abstract

The invention discloses a double-loader double-input single-output power closed test bench, belongs to the field of mechanical test devices with different high-power and low-input powers, and aims to solve the problem of lack of research on a high-load branch gearbox power closed test in the prior art. The power output device is connected with a first input shaft of the accompanying gearbox through a first coupling, a first output shaft of the accompanying gearbox is connected with one end of the high-side loader through a second coupling, and the other end of the high-side loader is connected with a first input shaft of the test gearbox through a third coupling; a second output shaft of the accompanying test gearbox is connected with one end of a low-side loader through a fourth coupling, and the other end of the low-side loader is connected with a second input shaft of the test gearbox through a fifth coupling; an output shaft of the test gearbox is connected with one end of a torsion meter through a sixth coupling; the device is used for simulating the problem that the input power of the high-voltage side and the low-voltage side of the double-input gearbox is different, so that the test gearbox is monitored.

Description

Technical Field

[0001] The invention belongs to the field of high-power and low-input-power different mechanical testing devices, and relates to a power testing platform. Background Art

[0002] The power closed test technology is to operate at the required speed and the specified test load, and provide simulated power to the test system through the loading device. Different loading devices will result in different performance of the test system, and the accuracy, reliability, applicability and energy consumption of the test system will also be different. Compared with the open test bench, the closed test bench has advantages that the open test bench cannot achieve, such as low power consumption and small test space during the test. Therefore, although the design and layout of the open test bench are relatively simple, its economy is poor. It is difficult to build a test bench for large gear transmission devices. For example, for the main reduction gearbox of a large ship, a high-load multi-stage branch gear transmission is adopted. Its high and low pressure sides have the same gear transmission structure characteristics. The test of a large gearbox is often more difficult. Therefore, there is a lack of research on the power closed test of a high-load branch gearbox. Summary of the invention

[0003] The purpose of the present invention is to solve the problem of the lack of research on power closed test of high-load branch gearboxes, and propose a double-loader double-input single-output power closed test bench.

[0004] A dual-loader dual-input single-output power closed test bench, the power closed test bench comprising a power output device, a companion test gearbox, a test gearbox, a torque meter, a high-side loader, a low-side loader, and couplings No. 1 to No. 7;

[0005] The power output device is connected to the first input shaft of the accompanying test gearbox through a No. 1 coupling, the first output shaft of the accompanying test gearbox is connected to one end of the high side loader through a No. 2 coupling, and the other end of the high side loader is connected to the first input shaft of the test gearbox through a No. 3 coupling;

[0006] The second output shaft of the companion gearbox is connected to one end of the low side loader through the No. 4 coupling, and the other end of the low side loader is connected to the second input shaft of the test gearbox through the No. 5 coupling;

[0007] The output shaft of the test gearbox is connected to one end of the torque meter through a No. 6 coupling, and the other end of the torque meter is connected to the second input shaft of the test gearbox;

[0008] A high side loader and a low side loader are used to apply loads of different powers to the test gearbox respectively;

[0009] The torque meter is used to measure the torque output by the test gearbox, so as to obtain the output power of the test gearbox.

[0010] Preferably, both the high side loader and the low side loader are hydraulic loaders.

[0011] Preferably, the power output device comprises a traction motor and a speed increasing gearbox;

[0012] The output shaft of the drag motor is connected to the input shaft of the speed increasing gearbox, and the output shaft of the speed increasing gearbox is connected to the input shaft of the companion gearbox through a No. 1 coupling.

[0013] The beneficial effects of the present invention are:

[0014] The present invention proposes a double-loader power closed test bench and is applied to a large-power double-input single-output scaled test gearbox. The test bench adopts a double-input single-output mirror arrangement, and the companion test gearbox and the test gearbox are input and output to each other. Hydraulic loaders are installed at the double input ends to simulate the difference between actual high and low turbine input powers. Then, the test gearbox data is measured by a torque meter to monitor the simulation effect. And a drag motor is connected on the speed-increasing gearbox side to supplement the loss power. Therefore, the present invention can better simulate the problem of different input powers on the high and low pressure sides of the double-input gearbox.

[0015] The invention can realize all forward and reverse working conditions of a high-power steam turbine high-horsepower reduction gear device in engineering, and simulate the real working condition that the power input on the high and low pressure sides are unequal.

[0016] The power closed test bench of the present invention has the advantages of low power consumption during the test and small test space, and is particularly economical in the case of a high-power test bench. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The schematic diagram is a principle diagram of a dual-loader dual-input single-output power closed test bench. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0020] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.

[0021] Example:

[0022] Combination Figure 1 This embodiment is described as a dual-loader dual-input single-output power closed test bench, the power closed test bench comprises a power output device, a companion test gearbox 3, a test gearbox 4, a torque meter 5, a high-side loader 6, a low-side loader 7 and couplings No. 1 to No. 7;

[0023] The power output device is connected to the first input shaft of the accompanying test gearbox 3 through the No. 1 coupling, the first output shaft of the accompanying test gearbox 3 is connected to one end of the high side loader 6 through the No. 2 coupling, and the other end of the high side loader 6 is connected to the first input shaft of the test gearbox 4 through the No. 3 coupling;

[0024] The second output shaft of the companion gearbox 3 is connected to one end of the low side loader 7 through the No. 4 coupling, and the other end of the low side loader 7 is connected to the second input shaft of the test gearbox 4 through the No. 5 coupling;

[0025] The output shaft of the test gearbox 4 is connected to one end of the torque meter 5 through a No. 6 coupling, and the other end of the torque meter 5 is connected to the second input shaft of the companion test gearbox 3;

[0026] A high-side loader 6 and a low-side loader 7 are used to apply loads of different powers to the test gearbox 4 respectively;

[0027] The torque meter 5 is used to measure the torque output by the test gear box 4 , so as to obtain the output power of the test gear box 4 .

[0028] Specifically, the power closed test system connects the input end of two double-input single-output gearboxes to the output end and the output end to the input end, connects them with a torque meter at the input shaft end (output end), and connects them with a loader at the output end (input end) to form a closed system. One of the two double-input single-output gearboxes is used as a test gearbox and the other as a companion test gearbox. The loader uses a hydraulic loader. A closed torque is generated and applied to the two gearboxes. The hydraulic loader changes its oil pressure to dynamically, automatically, and continuously load the system. The drive motor power only needs to overcome the friction power loss inside the system.

[0029] Although the single-loader dual-input single-output power closed test bench only needs to control one loader to realize the power flow direction, the input power on the high and low pressure sides of the tested gearbox is the same, and the input torque can only be distributed according to the speed ratio of the high and low pressure sides. However, in actual engineering, the power input on the high and low pressure sides of all forward and reverse conditions of the high-power steam turbine high-horsepower reduction gear device are not equal. Therefore, it can be seen that the dual-loader dual-input single-output power closed test bench has more direct loading control and can flexibly control the input power and torque on the high and low pressure sides of the tested gearbox to meet actual engineering needs.

[0030] By setting the loader output torque direction and drive steering, the power flow is realized as follows: high and low pressure side loaders → high and low pressure side input shafts of the test gearbox → test gearbox output shaft → companion test gearbox input shaft → companion test gearbox output shaft → companion test gearbox output shaft → high and low pressure side loaders, realizing power closure.

[0031] It is further defined below that both the high side loader 6 and the low side loader 7 are hydraulic loaders.

[0032] It is further defined below that the power output device includes a traction motor 1 and a speed increasing gearbox 2;

[0033] The output shaft of the drag motor 1 is connected to the input shaft of the speed increasing gear box 2, and the output shaft of the speed increasing gear box 2 is connected to the input shaft of the companion gear box 3 through a No. 1 coupling.

[0034] Although the present invention is described herein with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the present invention. It should therefore be understood that many modifications may be made to the exemplary embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that the various dependent claims and features described herein may be combined in a manner different from that described in the original claims. It should also be understood that features described in conjunction with individual embodiments may be used in other described embodiments.

Claims

1. A dual-loader dual-input single-output power closed test bench, characterized in that: The power closed test bench comprises a power output device, a test gearbox (3), a test gearbox (4), a torque meter (5), a high side loader (6), a low side loader (7) and couplings No. 1 to No. 7; The power output device is connected to the first input shaft of the accompanying test gearbox (3) through a No. 1 coupling, the first output shaft of the accompanying test gearbox (3) is connected to one end of the high side loader (6) through a No. 2 coupling, and the other end of the high side loader (6) is connected to the first input shaft of the test gearbox (4) through a No. 3 coupling; The second output shaft of the accompanying test gearbox (3) is connected to one end of the low side loader (7) through a No. 4 coupling, and the other end of the low side loader (7) is connected to the second input shaft of the test gearbox (4) through a No. 5 coupling; The output shaft of the test gearbox (4) is connected to one end of the torque meter (5) through a No. 6 coupling, and the other end of the torque meter (5) is connected to the second input shaft of the accompanying test gearbox (3); A high-side loader (6) and a low-side loader (7) are used to apply loads of different powers to the test gearbox (4) respectively; The torque meter (5) is used to measure the torque output by the test gear box (4), thereby obtaining the output power of the test gear box (4).

2. A dual-loader dual-input single-output power closed test bench according to claim 1, characterized in that: The high side loader (6) and the low side loader (7) are both hydraulic loaders.

3. A dual-loader dual-input single-output power closed test bench according to claim 1, characterized in that: The power output device comprises a traction motor (1) and a speed increasing gear box (2); The output shaft of the traction motor (1) is connected to the input shaft of the speed increasing gear box (2), and the output shaft of the speed increasing gear box (2) is connected to the input shaft of the accompanying test gear box (3) through a No. 1 coupling.

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