Mechanical overspeed protection device verification system capable of adjusting axial direction

Abstract

The utility model relates to the technical field of machine testing, and discloses an axial-adjustable mechanical overspeed protection device verification system, which comprises a mechanical overspeed protection device, a verification device, an oil supply device and a base, the transmission shaft and the main shaft of the variable frequency motor are connected through the coupler, so that the transmission shaft can be synchronously driven to rotate through rotation of the variable frequency motor, and the action speed of the mechanical overspeed protection device is calibrated in combination with the tachymeter to check whether the mechanical overspeed protection device can work normally or not; the axial space for adjusting the relative position of the transmission shaft and the coupling is provided through the adjusting cavity at one end of the coupling, so that the axial distance between the mechanical overspeed protection device and the variable frequency motor is changed through adjusting the relative position of the transmission shaft and the coupling, the calibration requirements in different environments are met, and the application range is widened. In addition, lubricating oil is supplied to the mechanical overspeed protection device through the first oil supply pipeline and the first oil return pipeline, so that the problems of insufficient lubricating oil and insufficient cooling effect are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to machine test technical field especially relates to a kind of adjustable axial mechanical overspeed protection device calibration system. BACKGROUND

[0002] Diesel engines are widely used in the field of marine, and are the main propulsion device of most merchant ships and many fishing boats and yachts. The ship generates power by burning diesel, driving the propeller or water wheel, and moving forward. To continuously monitor the speed of the diesel engine, ensure that it operates within the set safety range, and make the diesel engine speed exceed the preset safety limit, the diesel engine can be forced to slow down or stop, thereby preventing the occurrence of overspeed accidents. Mechanical overspeed protection device is usually installed in diesel engine to prevent mechanical damage or safety accidents caused by overspeed.

[0003] Mechanical overspeed protection device is particularly important in diesel engine and other internal combustion engines, because internal combustion engines may cause serious damage or even explosion when running at overspeed. Therefore, regular detection and calibration of the safety performance of mechanical overspeed protection device to ensure its accurate and reliable operation is an important measure to ensure the safe operation of mechanical equipment.

[0004] During the calibration of mechanical overspeed protection device, the mechanical overspeed protection device is usually directly connected with the variable frequency motor through rigid coupling, so that the axial distance between the mechanical overspeed protection device and the variable frequency motor cannot be adjusted, which leads to the problem that the variable frequency motor cannot be used to calibrate the mechanical overspeed protection device under some special working conditions. UTILITY MODEL CONTENTS

[0005] The utility model aims to provide a kind of adjustable axial mechanical overspeed protection device calibration system, solve the problem that the axial distance between mechanical overspeed protection device and variable frequency motor cannot be adjusted during the calibration of mechanical overspeed protection device in prior art.

[0006] To achieve the above-mentioned purpose, the utility model provides a kind of adjustable axial mechanical overspeed protection device calibration system, which includes mechanical overspeed protection device, calibration device, oil supply device and base;

[0007] The mechanical overspeed protection device and the calibration device are arranged on the base;

[0008] The calibration device includes variable frequency motor, tachometer and shaft coupling assembly; the shaft coupling assembly includes coupling, transmission shaft and coupling;

[0009] The coupling is fixed on the mechanical overspeed protection device, the transmission shaft is rotatably connected in the coupling, and the coupling is provided with an adjusting cavity at one end close to the mechanical overspeed protection device.

[0010] The transmission shaft is connected with the main shaft of the variable frequency motor through the coupling, and the tachometer is arranged above the coupling and used for measuring the rotating speed of the main shaft of the variable frequency motor.

[0011] The oil supply device comprises an oil storage tank, a first oil supply pipeline, a first oil return pipeline and an oil supply pump; the oil storage tank is communicated with the mechanical overspeed protection device through the first oil supply pipeline and the first oil return pipeline respectively, and the oil supply pump is arranged on the first oil supply pipeline.

[0012] Further, the coupling comprises a shell, an end cover, an oil seal, a positioning sleeve and a pair of rolling bearings.

[0013] In the axial direction of the transmission shaft, one end close to the mechanical overspeed protection device is defined as the front end, and the other end is defined as the rear end.

[0014] The shell is in a hollow shape with two open ends, the inner wall of the shell is inwardly protruded and annularly provided with a partition block, the partition block divides the internal space of the shell into an adjusting cavity and a connecting cavity arranged in sequence from front to rear, and the adjusting cavity is communicated with the connecting cavity.

[0015] The rolling bearings, the oil seal and the end cover are sequentially sleeved on the outer periphery of the transmission shaft from front to rear, the positioning sleeve is arranged between the pair of rolling bearings; the rolling bearings, the oil seal and the positioning sleeve are arranged in the connecting cavity, and the end cover covers the rear end opening of the shell.

[0016] The transmission shaft is connected with the shell through the pair of rolling bearings.

[0017] Further, the first oil supply pipeline is further provided with a first stop valve and a pressure gauge; the first stop valve is arranged downstream of the oil supply pump, and the pressure gauge is arranged downstream of the first stop valve.

[0018] Further, the oil supply device further comprises an auxiliary pipeline.

[0019] The two ends of the auxiliary pipeline are communicated with the first oil supply pipeline and the first oil return pipeline respectively, and the inlet end of the auxiliary pipeline is located downstream of the oil supply pump.

[0020] The second stop valve is arranged on the auxiliary pipeline.

[0021] Further, the oil supply device further comprises a second oil supply pipeline and a second oil return pipeline.

[0022] The coupling is communicated with the first oil supply pipeline through the second oil supply pipeline, and the coupling is communicated with the first oil return pipeline through the second oil return pipeline.

[0023] The inlet end of the second oil supply pipeline is arranged downstream of the first stop valve.

[0024] Further, the mechanical overspeed protection device comprises an observation assembly.

[0025] An observation opening is arranged on the mechanical overspeed protection device and communicates with the inside of the mechanical overspeed protection device.

[0026] The observation assembly comprises a visual glass and a sealing gasket connected with each other, and the visual glass and the sealing gasket are arranged in the observation opening from outside to inside, the visual glass is connected with the edge of the observation opening through the sealing gasket, and the observation opening is covered by the visual glass.

[0027] Further, a positioning device is further included.

[0028] The positioning device is arranged on the base, a positioning hole is arranged on the positioning device, and the mechanical overspeed protection device is connected to the positioning device through the positioning hole.

[0029] Further, the calibration device further comprises a speed regulator, and the speed regulator is electrically connected with the variable frequency motor.

[0030] Further, a plurality of sets of moving pulleys are arranged on the bottom of the base.

[0031] Compared with the prior art, the mechanical overspeed protection device calibration system with adjustable axial direction has the following beneficial effects:

[0032] The mechanical overspeed protection device calibration system with adjustable axial direction comprises a mechanical overspeed protection device, a calibration device, an oil supply device and a base. The transmission shaft and the main shaft of the variable frequency motor are connected through the coupling, so that the transmission shaft can be driven to rotate synchronously through the rotation of the variable frequency motor, and the action speed of the mechanical overspeed protection device is calibrated in combination with the speed meter, so as to check whether the mechanical overspeed protection device can normally work to protect the generator. The adjustment cavity is arranged at one end of the coupling, axial space for adjusting the relative position between the transmission shaft and the coupling is provided, the relative position between the transmission shaft and the coupling is adjusted, the axial distance between the mechanical overspeed protection device and the variable frequency motor is changed, the calibration requirement of the mechanical overspeed protection device under different environments is met, and the application range is improved. In addition, the mechanical overspeed protection device is supplied with lubricating oil through the first oil supply pipeline and the first oil return pipeline, so as to solve the problems of insufficient lubricating oil and insufficient cooling effect. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 is a schematic view of a kind of adjustable axial mechanical overspeed protection device verification system of the utility model embodiment;

[0034] Figure 2 is the cross section schematic view of coupling and transmission shaft of a kind of adjustable axial mechanical overspeed protection device verification system of the utility model embodiment;

[0035] Figure 3 is the cross section schematic view of observation component of a kind of adjustable axial mechanical overspeed protection device verification system of the utility model embodiment.

[0036] In the drawing, 100, adjustable axial mechanical overspeed protection device verification system;1, mechanical overspeed protection device;10, observation port;11, observation component;111, visual glass;112, sealing gasket;2, verification device;21, variable frequency motor;22, speed meter;23, connecting shaft component;231, coupling;2311, shell;23110, partition block;23111, adjusting cavity;23112, connecting cavity;2312, end cover;2313, oil seal;2314, positioning sleeve;2315, rolling bearing;232, transmission shaft;233, coupling;24, speed regulator;3, oil supply device;31, oil storage tank;32, first oil supply pipeline;321, first stop valve;322, pressure gauge;33, first oil return pipeline;34, oil supply pump;35, auxiliary pipeline;351, second stop valve;36, second oil supply pipeline;37, second oil return pipeline;4, base;5, positioning device. DETAILED DESCRIPTION

[0037] The specific embodiments of the utility model are described in further detail below in combination with the drawings and examples. The following examples are used to illustrate the utility model, but not to limit the scope of the utility model.

[0038] As Figures 1-3 Indicated, a kind of adjustable axial mechanical overspeed protection device verification system 100 of the utility model embodiment, it includes mechanical overspeed protection device 1, verification device 2, oil supply device 3 and base 4;The mechanical overspeed protection device 1 and verification device 2 are located on the base 4;The verification device 2 includes variable frequency motor 21, speed meter 22 and connecting shaft component 23;The connecting shaft component 23 includes coupling 231, transmission shaft 232 and coupling 233;

[0039] The coupling 231 is fixed on the mechanical overspeed protection device 1, the transmission shaft 232 is rotatably connected in the coupling 231, and the coupling 231 is provided with an adjusting cavity 23111 at one end close to the mechanical overspeed protection device 1, which is used to provide axial space for adjusting the relative position of the transmission shaft 232 and the coupling 231;

[0040] The transmission shaft 232 is connected with the main shaft of the variable frequency motor 21 through the coupling 233, and the tachometer 22 is arranged above the coupling 233 and used to measure the rotating speed of the main shaft of the variable frequency motor 21.

[0041] The oil supply device 3 comprises an oil storage tank 31, a first oil supply pipeline 32, a first oil return pipeline 33 and an oil supply pump 34; the oil storage tank 31 is communicated with the mechanical overspeed protection device 1 through the first oil supply pipeline 32 and the first oil return pipeline 33 respectively, and the oil supply pump 34 is arranged on the first oil supply pipeline 32.

[0042] Based on the above technical scheme, the transmission shaft 232 and the main shaft of the variable frequency motor 21 are connected through the coupling 233, so that the transmission shaft 232 can be driven to rotate synchronously through the rotation of the variable frequency motor 21, and the action speed of the mechanical overspeed protection device 1 is calibrated in combination with the tachometer 22, so as to check whether the mechanical overspeed protection device 1 can normally work to protect the generator; the adjusting cavity 23111 at one end of the coupling 231 provides axial space for adjusting the relative position of the transmission shaft 232 and the coupling 231, so that the axial distance between the mechanical overspeed protection device 1 and the variable frequency motor 21 is changed through the adjustment of the relative position of the transmission shaft 232 and the coupling 231, thereby adapting to the calibration requirements of the mechanical overspeed protection device in different environments and improving the application range. In addition, the first oil supply pipeline 32 and the first oil return pipeline 33 are used to supply lubricating oil to the mechanical overspeed protection device 1, so as to solve the problems of insufficient lubricating oil and insufficient cooling effect.

[0043] Preferably, in the embodiment, the variable frequency motor 21 is a horizontal variable frequency motor; the horizontal variable frequency motor is usually designed more compactly and occupies a small area, so as to be convenient for adapting to various calibration scenes.

[0044] Preferably, the tachometer 22 is an MCS-II fixed magnetic microcomputer tachometer, which can measure the rotating speed of 0-9999 r / min, the voltage is 220V, and the rotating speed is digital display, so as to obtain more accurate speed measurement effect.

[0045] Further, as shown in FIG. 1, Figure 1 and Figure 2As shown in the figure, the adjustment cavity 23111 is arranged in the coupling 231, and the transmission shaft 232 is rotatably connected to the coupling 231; the coupling 231 comprises a shell 2311, an end cover 2312, an oil seal 2313, a positioning sleeve 2314 and a pair of rolling bearings 2315; the end of the transmission shaft 232 close to the mechanical overspeed protection device 1 is defined as the front end, and the other end is defined as the rear end; the shell 2311 is hollow with two open ends, the inner wall of the shell 2311 is annularly provided with a partition block 23110 protruding inward, the partition block 23110 divides the internal space of the shell 2311 into the adjustment cavity 23111 and the connecting cavity 23112 arranged in sequence from front to rear, and the adjustment cavity 23111 communicates with the connecting cavity 23112;

[0046] The rolling bearings 2315, the oil seal 2313 and the end cover 2312 are sequentially sleeved on the outer periphery of the transmission shaft 232 from front to rear, and the positioning sleeve 2314 is arranged between the pair of rolling bearings 2315; the rolling bearings 2315, the oil seal 2313 and the positioning sleeve 2314 are arranged in the connecting cavity 23112, and the end cover 2312 covers the rear end opening of the shell 2311; the transmission shaft 232 is connected to the shell 2311 through the pair of rolling bearings 2315.

[0047] Further, as shown in the figure, Figure 1 in order to improve the lubrication and cooling effect of the oil supply device 3 on the mechanical overspeed protection device 1 during the test process; the first oil supply pipeline 32 is further provided with a first stop valve 321 and a pressure gauge 322; the first stop valve 321 is arranged downstream of the oil supply pump 34, and the pressure gauge 322 is arranged downstream of the first stop valve 321. By cooperation of the first stop valve 321 and the pressure gauge 322, the pressure of the lubricating oil input to the mechanical overspeed protection device 1 is controlled to ensure that the oil supply device 3 can provide sufficient lubrication and cooling effect.

[0048] Preferably, the oil supply pump 34 in the embodiment is selected from a CB-B2.5 type gear pump set, with a flow rate of 2.5 m3 / h, a power of 750 W, a voltage of 380 V and a frequency of 50 HZ.

[0049] Further, as shown in the figure, Figure 1 in order to balance the pressure between the first oil supply pipeline 32 and the first oil return pipeline 33, and prevent the oil supply device 3 from being unstable or damaged due to excessive pressure difference; the oil supply device 3 further comprises an auxiliary pipeline 35; the two ends of the auxiliary pipeline 35 are in communication with the first oil supply pipeline 32 and the first oil return pipeline 33, respectively, and the inlet end of the auxiliary pipeline 35 is located downstream of the oil supply pump 34; the auxiliary pipeline 35 is provided with a second stop valve 351.

[0050] Further, as shown in Figure 1 To ensure normal lubrication and cooling of the coupling 231 during the test, the oil supply device 3 further comprises a second oil supply pipeline 36 and a second oil return pipeline 37; the coupling 231 is communicated with the first oil supply pipeline 32 through the second oil supply pipeline 36, and the coupling 231 is communicated with the first oil return pipeline 33 through the second oil return pipeline 37; the inlet end of the second oil supply pipeline 36 is arranged downstream of the first stop valve 321.

[0051] Further, as shown in Figure 1 And Figure 3 To facilitate observation of the bearing lubrication and gear operation during the test of the mechanical overspeed protection device 1, and ensure the intuitive inspection effect, the mechanical overspeed protection device 1 comprises an observation assembly 11; the mechanical overspeed protection device 1 is provided with an observation port 10 communicating with the inside of the mechanical overspeed protection device 1; the observation assembly 11 comprises a visual glass 111 and a sealing gasket 112 connected with each other, and the visual glass 111 and the sealing gasket 112 are arranged in the observation port 10 from outside to inside, and the visual glass 111 is connected with the edge of the observation port 10 through the sealing gasket 112 and covers the observation port 10.

[0052] Further, as shown in Figure 1 To be suitable for testing different mechanical overspeed protection devices and facilitate the coaxiality of the mechanical overspeed protection device and the variable frequency motor, the adjustable axial mechanical overspeed protection device testing system 100 further comprises a positioning device 5; the positioning device 5 is arranged on the base 4, and the positioning device 5 is provided with a positioning hole (not shown in the figure), and the mechanical overspeed protection device 1 is connected to the positioning device 5 through the positioning hole.

[0053] Further, as shown in Figure 1 To facilitate adjustment of the rotating speed of the variable frequency motor 21, the testing device 2 further comprises a speed governor 24; the speed governor 24 is electrically connected with the variable frequency motor 21, and the low speed gear, the high speed gear and the highest speed limit gear are set in the speed governor 24 through PLC programming setting, so that when the variable frequency motor 21 runs to the highest speed limit, the variable frequency motor automatically stops running, and the self-protection function is realized.

[0054] Further, to facilitate movement and adjustment of the testing device 2 and the mechanical overspeed protection device 1, the bottom of the base 4 is provided with a plurality of sets of moving pulleys (not shown in the figure).

[0055] The working process of the utility model is as follows:

[0056] The mechanical overspeed protection device 1 is installed on the positioning device 5 through the positioning hole. The appropriate axial distance is set according to the requirement, and the relative position of the coupling 231 and the transmission shaft 232 is determined, and the transmission shaft 232 is installed in the coupling 231 according to the set relative position.

[0057] The main shaft of the variable frequency motor 21 is connected with the transmission shaft 232 through the coupling 233, and the low speed gear, the high speed gear and the highest speed limit gear are set through the PLC programming setting in the speed regulator 24.

[0058] The variable frequency motor is started, and whether the mechanical overspeed protection device 1 normally performs the overspeed protection action when the variable frequency motor 21 reaches the rated speed is determined through the tachometer 22, and the bearing lubrication condition and the gear operation condition in the detection process are observed through the visible glass 111.

[0059] In summary, the utility model embodiment provides a kind of adjustable axial mechanical overspeed protection device detection system 100, it includes mechanical overspeed protection device 1, detection device 2, oil supply device 3 and base 4;The main shaft of the transmission shaft 232 and variable frequency motor 21 is connected with the coupling 233, so that it can be driven by the rotation of the variable frequency motor 21, and the action speed of mechanical overspeed protection device 1 is calibrated in combination with the tachometer 22, to check whether mechanical overspeed protection device 1 can normally work to protect generator;The axial space of the relative position of the transmission shaft 232 and the coupling 231 is provided in the adjusting cavity 23111 of one end of the coupling 231, to adjust the relative position of the transmission shaft 232 and the coupling 231, and then change the axial distance of the mechanical overspeed protection device 1 and the variable frequency motor 21, to adapt to the detection requirement of mechanical overspeed protection device in different environments, improve the scope of application. In addition, the mechanical overspeed protection device 1 is supplied with lubricating oil through the first oil supply pipeline 32 and the first oil return pipeline 33, to improve the problem of insufficient lubricating oil and insufficient cooling effect.

[0060] The above only is the preferred embodiment of the utility model, it should be pointed out, for ordinary skilled person in the art, without departing from the technical principle of the utility model, several improvements and substitutions can be made, these improvements and substitutions also should be regarded as the protection range of the utility model.

Claims

1. An adjustable axial mechanical overspeed protection device verification system, comprising: The mechanical overspeed protection device, the testing device, the oil supply device and the base; The mechanical overspeed protection device and the testing device are arranged on the base; The testing device comprises a variable frequency motor, a tachometer and a shaft assembly; the shaft assembly comprises a shaft joint, a transmission shaft and a shaft coupling; The shaft joint is fixed on the mechanical overspeed protection device, the transmission shaft is rotatably connected to the shaft joint, and an adjusting cavity is formed at one end of the shaft joint close to the mechanical overspeed protection device; the adjusting cavity provides axial space for adjusting the relative position of the transmission shaft and the shaft joint; The transmission shaft is connected to the main shaft of the variable frequency motor through the shaft coupling; the tachometer is arranged above the shaft coupling and is used to measure the rotating speed of the main shaft of the variable frequency motor; The oil supply device comprises an oil storage tank, a first oil supply pipeline, a first oil return pipeline and an oil supply pump; the oil storage tank is communicated with the mechanical overspeed protection device through the first oil supply pipeline and the first oil return pipeline respectively, and the oil supply pump is arranged on the first oil supply pipeline.

2. The mechanical overspeed protection device testing system of claim 1, wherein, The shaft joint comprises a shell, an end cover, an oil seal, a positioning sleeve and a pair of rolling bearings; In the axial direction of the transmission shaft, one end close to the mechanical overspeed protection device is the front end, and the other end is the rear end; The shell is hollow with two open ends, the inner wall of the shell is inwardly convex and annularly arranged with a partition block, the partition block divides the internal space of the shell into an adjusting cavity and a connecting cavity arranged in sequence from front to back, and the adjusting cavity is communicated with the connecting cavity; The rolling bearings, the oil seal and the end cover are sequentially sleeved on the outer periphery of the transmission shaft from front to back, and the positioning sleeve is arranged between the pair of rolling bearings; the rolling bearings, the oil seal and the positioning sleeve are arranged in the connecting cavity, and the end cover covers the rear end opening of the shell; The transmission shaft is connected to the shell through the pair of rolling bearings.

3. The mechanical overspeed protection device testing system of claim 1, wherein, A first stop valve and a pressure gauge are further arranged on the first oil supply pipeline; the first stop valve is arranged downstream of the oil supply pump, and the pressure gauge is arranged downstream of the first stop valve.

4. The mechanical overspeed protection device testing system of claim 3, wherein, The oil supply device further comprises an auxiliary pipeline; The two ends of the auxiliary pipeline are communicated with the first oil supply pipeline and the first oil return pipeline respectively, and the inlet end of the auxiliary pipeline is located downstream of the oil supply pump; A second stop valve is arranged on the auxiliary pipeline.

5. The mechanical overspeed protection device testing system of claim 3, wherein, The oil supply device further comprises a second oil supply pipeline and a second oil return pipeline; The shaft joint is communicated with the first oil supply pipeline through the second oil supply pipeline, and is communicated with the first oil return pipeline through the second oil return pipeline; The inlet end of the second oil supply pipeline is arranged downstream of the first stop valve.

6. The mechanical overspeed protection device testing system of claim 1, wherein, The mechanical overspeed protection device comprises an observation assembly; An observation opening is formed in the mechanical overspeed protection device and communicated with the inside of the mechanical overspeed protection device; The observation assembly comprises a visual glass and a sealing gasket connected in sequence, the visual glass and the sealing gasket are arranged in the observation opening from outside to inside, the visual glass is connected with the edge of the observation opening through the sealing gasket and covers the observation opening.

7. The mechanical overspeed protection device testing system of claim 1, wherein, Further comprising a positioning device; The positioning device is arranged on the base, and a positioning hole is arranged on the positioning device.

8. The mechanical overspeed protection device testing system of claim 1, wherein, The detection device further comprises a speed regulator, and the speed regulator is electrically connected with the variable frequency motor.

9. The mechanical overspeed protection device testing system of claim 1, wherein, The base is provided with a plurality of sets of moving pulleys at the bottom.

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