A load adjusting device for working water cavity of a hydraulic dynamometer

Abstract

The utility model relates to a kind of working water cavity load adjusting devices of hydraulic dynamometer, it is related to hydraulic dynamometer technical field.To solve the control precision of working water cavity load adjusting valve in hydraulic dynamometer under high flow high pressure difference operating condition is lower, and it does not have the function of quick action and power-off valve position keeping, to cause the test result of hydraulic dynamometer when being put into test to exist error problem.When the rotation in swing cylinder in hydraulic dynamometer reaches position or system power-off state appears, the output end of locking oil cylinder can be extended by oil circuit control, the rack on the output end of locking oil cylinder is engaged with the half circular gear of rotating shaft in swing cylinder assembly, and auxiliary pin is inserted into the locking positioning hole inside guide rail on the end face of rack connecting frame, to limit the height of rack, to realize the function of locking oil cylinder generating self-locking, with the function of quick action and power-off valve position keeping, realize the function of swing cylinder generating self-locking.The utility model is suitable for hydraulic dynamometer technical field.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic dynamometer technology, specifically to a working water chamber load adjustment device for a hydraulic dynamometer. Background Technology

[0002] For high-power equipment (such as gas turbines, steam turbines, and diesel engines), due to the numerous subsystems involved, it is often necessary to test the performance indicators of the entire system after it has been manufactured but before it is put into use, in order to ensure the safety and reliability of the system. Hydraulic dynamometers, as large power-absorbing devices, are mainly used in conjunction with prime movers to conduct such tests.

[0003] The hydraulic dynamometer is connected to the prime mover via a shaft. The prime mover outputs power, the connecting shaft transmits power, and the hydraulic dynamometer consumes power. The medium for power consumption by the hydraulic dynamometer is water. Water enters the water chamber from the water tower through the inlet pipe of the hydraulic dynamometer, exits the water chamber through the outlet pipe, and then returns to the water tower for recycling. By controlling the inlet and outlet flow rates during the operation of the hydraulic dynamometer, the load is adjusted, thereby regulating the absorbed power to achieve the desired operating conditions of the prime mover. However, under high flow and high pressure differential operating conditions, the control accuracy of the load regulating valve in the working water chamber of the hydraulic dynamometer is low, and it lacks rapid action and power-off valve position retention functions, resulting in errors in the test results obtained when the hydraulic dynamometer is put into operation. Utility Model Content

[0004] This invention addresses the problem that the control accuracy of the working water chamber load regulating valve in a hydraulic dynamometer is low and it lacks the functions of rapid action and power-off valve position retention, which leads to errors in the test results obtained when the hydraulic dynamometer is put into testing. Therefore, a working water chamber load regulating device for a hydraulic dynamometer is proposed.

[0005] The present invention relates to a working water chamber load adjustment device for a hydraulic dynamometer, comprising a locking cylinder 1, a cylinder support plate 2, a rack clamping block 3, a rack connecting frame 4, a rack bracket 6, a base plate 8, a rack 9, a semi-circular gear 10, a locking nut 11, and a support plate 17.

[0006] A support plate 17 is provided at the middle of one end of the upper surface of the base plate 8. A cylinder support plate 2 is provided at the top of the support plate 17. A locking cylinder 1 is provided on the upper surface of the cylinder support plate 2. A threaded section is machined on the outer surface of the output end of the locking cylinder 1. After the output end of the locking cylinder 1 passes through the cylinder support plate 2, it is connected to the locking nut 11 and the rack clamping block 3 in sequence by thread. A rack 9 is provided at the center of the lower surface of the rack clamping block 3. A rack bracket 6 is provided at the middle of the long side of the upper surface of the base plate 8. A rack connecting frame 4 is provided on the rack bracket 6. The rack connecting frame 4 is slidably connected to the rack bracket 6. The end of the rack connecting frame 4 is fixedly connected to the end face of the rack 9. A semi-circular gear 10 is provided on the rotating shaft of the swing cylinder assembly in the hydraulic dynamometer. The semi-circular gear 10 meshes with the rack 9.

[0007] Furthermore, the rack support 6 has a guide rail along the length direction on its end face, a slider on the guide rail, and a rack connecting frame 4 on the end face of the slider.

[0008] Furthermore, the guide rail is uniformly machined with multiple locking and positioning holes along its long side end face;

[0009] Furthermore, the end face of the slider is provided with a through hole, and an auxiliary pin 5 is provided inside the through hole;

[0010] Furthermore, the end of the auxiliary pin 5 is inserted into the locking positioning hole on the long side end face of the guide rail;

[0011] Furthermore, a support rib 7 is provided between the lower surface of the cylinder support plate 2 and the side end face of the support plate 17;

[0012] Furthermore, two reinforcing plates 16 are evenly provided along the width direction between the side end face of the support plate 17 and the upper surface of the bottom plate 8.

[0013] Furthermore, a support rib 7 is provided in the middle between the side end face of the rack bracket 6 and the upper surface of the base plate 8;

[0014] Furthermore, the hydraulic oil input end of the locking cylinder 1 is connected to the first hydraulic oil input interface of the solenoid directional valve 12 via a pipe, and the hydraulic oil output end of the locking cylinder 1 is connected to the second hydraulic oil input interface of the solenoid directional valve 12 via a pipe. The hydraulic oil input end of the swing cylinder in the hydraulic dynamometer is connected to one end of a hydraulically controlled check valve 13, and the other end of the hydraulically controlled check valve 13 is connected to the second hydraulic oil input interface of the solenoid directional valve 12 via a pipe. The connection between the other end of the hydraulically controlled check valve 13 and the second hydraulic oil input interface of the solenoid directional valve 12 is connected to the first hydraulic oil input interface of the electro-hydraulic servo valve 14 via a pipe. The hydraulic oil output end of the swing cylinder in the hydraulic dynamometer is connected to one end of another hydraulically controlled check valve 13, and the other end of the hydraulically controlled check valve 13 is connected to the second hydraulic oil input interface of the electro-hydraulic servo valve 14 via a pipe. A plate filter 15 is provided at the hydraulic oil output interface of the electro-hydraulic servo valve 14.

[0015] Furthermore, when the swing cylinder in the hydraulic dynamometer reaches its rotation position or when the system loses power, the output end of the locking cylinder 1 can be extended through the oil circuit control, so that the rack 9 on the output end of the locking cylinder 1 meshes with the semi-circular gear 10 of the rotating shaft in the swing cylinder assembly, and the auxiliary pin 5 is inserted into the locking positioning hole on the guide rail at the end face of the rack connecting frame 4 to help limit the height of the rack 9, so as to realize the self-locking function of the locking cylinder 1, which has the functions of rapid action and power-off valve position retention, thereby forming a mechanical lock on the rotating shaft in the swing cylinder assembly, and thus realizing the precise control of the valve position of the working water chamber load regulating valve in the hydraulic dynamometer, thereby improving the accuracy of the test results.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] This invention overcomes the shortcomings of existing technologies. When the swing cylinder in the hydraulic dynamometer reaches its rotation position or when the system loses power, the output end of the locking cylinder can be extended through the oil circuit. This allows the rack on the output end of the locking cylinder to mesh with the semi-circular gear on the rotating shaft of the swing cylinder assembly. An auxiliary pin is then inserted into the locking positioning hole on the guide rail at the end face of the rack connecting bracket to assist in limiting the height of the rack. This achieves a self-locking function for the locking cylinder, providing both rapid action and power-off valve position retention. This mechanically locks the rotating shaft in the swing cylinder assembly, thereby enabling precise control of the working water chamber load regulating valve position in the hydraulic dynamometer and improving the accuracy of the test results. Attached Figure Description

[0018] Figure 1 This is a front view of a working water chamber load adjustment device for a hydraulic dynamometer according to the present invention;

[0019] Figure 2 yes Figure 1View from direction A;

[0020] Figure 3 This is a schematic diagram of the oil circuit control of the working water chamber load adjustment device of a hydraulic dynamometer according to the present invention. Detailed Implementation

[0021] Specific implementation method one: Combining Figure 1 and Figure 2 This embodiment describes a hydraulic dynamometer working water chamber load adjustment device, which comprises a locking cylinder 1, a cylinder support plate 2, a rack clamping block 3, a rack connecting frame 4, a rack bracket 6, a base plate 8, a rack 9, a semi-circular gear 10, a locking nut 11, and a support plate 17.

[0022] A support plate 17 is provided at the middle of one end of the upper surface of the base plate 8. A cylinder support plate 2 is provided at the top of the support plate 17. A locking cylinder 1 is provided on the upper surface of the cylinder support plate 2. A threaded section is machined on the outer surface of the output end of the locking cylinder 1. After the output end of the locking cylinder 1 passes through the cylinder support plate 2, it is connected to the locking nut 11 and the rack clamping block 3 in sequence by thread. A rack 9 is provided at the center of the lower surface of the rack clamping block 3. A rack bracket 6 is provided at the middle of the long side of the upper surface of the base plate 8. A rack connecting frame 4 is provided on the rack bracket 6. The rack connecting frame 4 is slidably connected to the rack bracket 6. The end of the rack connecting frame 4 is fixedly connected to the end face of the rack 9. A semi-circular gear 10 is provided on the rotating shaft of the swing cylinder assembly in the hydraulic dynamometer. The semi-circular gear 10 meshes with the rack 9.

[0023] In this specific embodiment, when the swing cylinder in the hydraulic dynamometer has reached its rotation position or when the system loses power, the output end of the locking cylinder 1 can be extended through the oil circuit control, so that the rack 9 on the output end of the locking cylinder 1 meshes with the semi-circular gear 10 of the rotating shaft in the swing cylinder assembly, and the auxiliary pin 5 is inserted into the locking positioning hole on the guide rail at the end face of the rack connecting frame 4 to help limit the height of the rack 9, so as to realize the self-locking function of the locking cylinder 1, which has the functions of rapid action and power-off valve position retention, thereby forming a mechanical lock on the rotating shaft in the swing cylinder assembly, and thus realizing the precise control of the valve position of the working water chamber load regulating valve in the hydraulic dynamometer, thereby improving the accuracy of the test results.

[0024] Specific Implementation Method Two: Combining Figure 1 and Figure 2 This embodiment further defines the adjustment device described in Specific Embodiment 1. The working water chamber load adjustment device of the hydraulic dynamometer described in this embodiment has a guide rail on the end face of the rack support 6 along the length direction, a slider on the guide rail, and a rack connecting frame 4 on the end face of the slider.

[0025] Specific implementation method three: Combining Figure 1 and Figure 2 This embodiment further defines the adjustment device described in Specific Embodiment Two. The working water chamber load adjustment device of the hydraulic dynamometer described in this embodiment has multiple locking and positioning holes uniformly machined on the long side end face of the guide rail.

[0026] Specific implementation method four: Combination Figure 1 and Figure 2 This embodiment further defines the adjustment device described in Specific Embodiment 3. The working water chamber load adjustment device of the hydraulic dynamometer described in this embodiment has a through hole on the end face of the slider, and an auxiliary pin 5 is provided inside the through hole.

[0027] Specific Implementation Method Five: Combining Figure 1 and Figure 2 This embodiment further defines the adjustment device described in Specific Embodiment 4. In this embodiment, the working water chamber load adjustment device of a hydraulic dynamometer is described, wherein the end of the auxiliary pin 5 is inserted into the locking positioning hole on the long side end face of the guide rail.

[0028] Specific Implementation Method Six: Combination Figure 1 and Figure 2 This embodiment further defines the adjustment device described in Specific Embodiment 1. In this embodiment, a working water chamber load adjustment device for a hydraulic dynamometer is provided, wherein a support rib 7 is provided between the lower surface of the cylinder support plate 2 and the side end face of the support plate 17.

[0029] Specific implementation method seven: Combination Figure 1 and Figure 2 This embodiment is a further limitation of the adjustment device described in Specific Embodiment 1. The working water chamber load adjustment device of the hydraulic dynamometer described in this embodiment has two reinforcing plates 16 evenly provided in the width direction between the side end face of the support plate 17 and the upper surface of the bottom plate 8.

[0030] In this specific embodiment, two reinforcing plates 16 are evenly provided along the width direction between the side end face of the support plate 17 and the upper surface of the base plate 8 to improve the stability of the device.

[0031] Specific implementation method eight: Combination Figure 1 and Figure 2This embodiment is a further limitation of the adjustment device described in Specific Embodiment 1. The working water chamber load adjustment device of the hydraulic dynamometer described in this embodiment has a support rib 7 provided in the middle between the side end face of the rack bracket 6 and the upper surface of the base plate 8.

[0032] In this specific embodiment, a support rib 7 is provided in the middle between the side end face of the rack bracket 6 and the upper surface of the base plate 8 to improve the stability of the device.

[0033] Specific Implementation Method Nine: Combining Figures 1 to 3 This embodiment further defines the adjusting device described in Specific Embodiment 1. The working water chamber load adjusting device of the hydraulic dynamometer described in this embodiment has the following features: the hydraulic oil input end of the locking cylinder 1 is connected to the first hydraulic oil input port of the solenoid directional valve 12 via a pipe; the hydraulic oil output end of the locking cylinder 1 is connected to the second hydraulic oil input port of the solenoid directional valve 12 via a pipe; the hydraulic oil input end of the swing cylinder in the hydraulic dynamometer is connected to one end of a hydraulically controlled check valve 13. The other end of 3 is connected to the second hydraulic oil input port of the solenoid directional valve 12 through a pipe. The other end of the hydraulic control check valve 13 is connected to the second hydraulic oil input port of the solenoid directional valve 12 through a pipe to the first hydraulic oil input port of the electro-hydraulic servo valve 14. The hydraulic oil output end of the swing cylinder in the hydraulic dynamometer is connected to one end of another hydraulic control check valve 13. The other end of the hydraulic control check valve 13 is connected to the second hydraulic oil input port of the electro-hydraulic servo valve 14 through a pipe. A plate filter 15 is provided at the hydraulic oil output port of the electro-hydraulic servo valve 14.

[0034] In this specific embodiment, when the electromagnetic reversing valve 12 is normally energized: the rod chamber of the locking cylinder 1 receives pressurized oil, the rodless chamber discharges oil, the piston rod retracts completely, and the locking cylinder 1 leaves the locking position; the hydraulic control check valve 13 opens, and the electro-hydraulic servo valve 14 controls the rotary swing cylinder to rotate to the rotation angle. The swing cylinder can rotate clockwise and counterclockwise, thereby controlling the opening, closing, and opening angle of the butterfly valve.

[0035] When the solenoid directional valve 12 is de-energized: the rod chamber of the locking cylinder 1 discharges back oil, the rodless chamber receives pressurized oil, the piston rod is fully extended, and the locking cylinder 1 is in the locking position; the hydraulic control check valve 13 is closed, and the swing cylinder remains in the de-energized position, that is, the butterfly valve remains in the de-energized position.

[0036] Working principle

[0037] When the swing cylinder in the hydraulic dynamometer reaches its rotation position or a power failure occurs, the output end of the locking cylinder 1 can be extended through the oil circuit control. This allows the rack 9 on the output end of the locking cylinder 1 to mesh with the semi-circular gear 10 on the rotating shaft of the swing cylinder assembly. The auxiliary pin 5 is then inserted into the locking positioning hole on the guide rail at the end face of the rack connecting frame 4 to assist in limiting the height of the rack 9. This achieves a self-locking function for the locking cylinder 1, providing both rapid action and power-off valve position retention. Consequently, the rotating shaft in the swing cylinder assembly is mechanically locked, thereby enabling precise control of the working water chamber load regulating valve position in the hydraulic dynamometer, thus improving the accuracy of the test results.

Claims

1. A working water chamber load adjustment device for a hydraulic dynamometer, characterized in that: It includes a locking cylinder (1), a cylinder support plate (2), a rack clamping block (3), a rack connecting frame (4), a rack bracket (6), a base plate (8), a rack (9), a semi-circular gear (10), a locking nut (11), and a support plate (17). A support plate (17) is provided at the middle of one end of the upper surface of the base plate (8). A cylinder support plate (2) is provided at the top of the support plate (17). A locking cylinder (1) is provided on the upper surface of the cylinder support plate (2). A threaded section is machined on the outer surface of the output end of the locking cylinder (1). After the output end of the locking cylinder (1) passes through the cylinder support plate (2), it is connected to the locking nut (11) and the rack clamping block (3) in sequence. A rack (9) is provided at the center of the lower surface of the rack clamping block (3). A rack bracket (6) is provided along the middle of the long side of the upper surface of the base plate (8). A rack connecting frame (4) is provided on the rack bracket (6). The rack connecting frame (4) is slidably connected to the rack bracket (6). The end of the rack connecting frame (4) is fixedly connected to the end face of the rack (9). A semi-circular gear (10) is provided on the rotating shaft of the swing cylinder assembly in the hydraulic dynamometer. The semi-circular gear (10) meshes with the rack (9).

2. The working water chamber load adjustment device for a hydraulic dynamometer according to claim 1, characterized in that: The rack support (6) has a guide rail along the length direction on its end face, and a slider is provided on the guide rail. The rack connecting frame (4) is provided on the end face of the slider.

3. The working water chamber load adjustment device for a hydraulic dynamometer according to claim 2, characterized in that: The guide rail is uniformly machined with multiple locking and positioning holes along its long side end face.

4. The working water chamber load adjustment device for a hydraulic dynamometer according to claim 3, characterized in that: The end face of the slider is provided with a through hole, and an auxiliary pin (5) is provided inside the through hole.

5. The working water chamber load adjustment device for a hydraulic dynamometer according to claim 4, characterized in that: The end of the auxiliary pin (5) is inserted into the locking positioning hole on the long side end face of the guide rail.

6. The working water chamber load adjustment device of a hydraulic dynamometer according to claim 1, characterized in that: The lower surface of the cylinder support plate (2) and the side end face of the support plate (17) are provided with support ribs (7).

7. The working water chamber load adjustment device for a hydraulic dynamometer according to claim 1, characterized in that: Two reinforcing plates (16) are evenly provided along the width direction between the side end face of the support plate (17) and the upper surface of the bottom plate (8).

8. The working water chamber load adjustment device of a hydraulic dynamometer according to claim 1, characterized in that: A support rib (7) is provided in the middle between the side end face of the rack bracket (6) and the upper surface of the base plate (8).

9. The working water chamber load adjustment device of a hydraulic dynamometer according to claim 1, characterized in that: The hydraulic oil input end of the locking cylinder (1) is connected to the first hydraulic oil input port of the solenoid directional valve (12) via a pipe, and the hydraulic oil output end of the locking cylinder (1) is connected to the second hydraulic oil input port of the solenoid directional valve (12) via a pipe. The hydraulic oil input end of the swing cylinder in the hydraulic dynamometer is connected to one end of a hydraulically controlled check valve (13), and the other end of the hydraulically controlled check valve (13) is connected to the second hydraulic oil input port of the solenoid directional valve (12) via a pipe. The other end of the directional valve (13) is connected to the second hydraulic oil input interface of the solenoid directional valve (12) through a pipe to the first hydraulic oil input interface of the electro-hydraulic servo valve (14). The hydraulic oil output end of the swing cylinder in the hydraulic dynamometer is connected to one end of another hydraulic control check valve (13). The other end of the hydraulic control check valve (13) is connected to the second hydraulic oil input interface of the electro-hydraulic servo valve (14) through a pipe. A plate filter (15) is provided at the hydraulic oil output interface of the electro-hydraulic servo valve (14).

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