Power-adjustable hydraulic dynamometer

Abstract

The utility model belongs to power testing equipment, and discloses a power-adjustable hydraulic dynamometer. Comprising a stator body with a first accommodating cavity; the rotor body is provided with a second accommodating cavity; a cavity is formed by the first containing cavity and the second containing cavity, and the cavity is filled with liquid; and the adjusting part is arranged in the first accommodating cavity, and the adjusting part changes the resistance of the cavity filled with the liquid so as to change the power. According to the utility model, the wing-shaped adjusting blade is adopted, the power of the dynamometer can be rapidly adjusted in the operation process of equipment, the adjusting range of the dynamometer is enlarged, the gear adjusting structure providing power for the dynamometer can well control the adjusting precision, and the power adjusting precision of the dynamometer is further realized.

Description

Technical Field

[0001] The utility model relates to a power test device, in particular to a hydraulic dynamometer with adjustable power. Background Art

[0002] At present, many rotary power devices use a hydraulic dynamometer for testing during the commissioning process. The hydraulic dynamometer is used to test the power of the engine. As a load of the engine, it realizes the adjustment of the measured working conditions, simulates the change of the external load during the actual operation of the power device, and at the same time measures the output torque and speed of the engine, so as to calculate the power of the engine. The existing hydraulic dynamometer adjusts the power by adjusting the water inflow and outflow, and has the problems of a small applicable power range, slow power adjustment speed, and inaccurate power adjustment. Summary of the Utility Model

[0003] In order to solve the above problems, the utility model provides a liquid dynamometer that is easy to operate and can accurately adjust the power, which includes:

[0004] A stator body having a first accommodation cavity;

[0005] A rotor body having a second accommodation cavity; forming a cavity with the first accommodation cavity, and the cavity is filled with liquid; an adjusting blade is arranged in the first accommodation cavity, and the adjusting blade changes the resistance of the liquid filled in the cavity, thereby changing the power; the adjusting blade has a tip and an arc end, and the two are connected by a transition arc. The adjusting blade changes the resistance of the liquid filled in the cavity, thereby changing the power.

[0006] The stator body and the rotor body are combined to form a cavity for accommodating liquid. By adjusting the blade to change the resistance of the liquid inside the cavity, the power can be quickly adjusted, and the convenience of power adjustment can be improved.

[0007] According to the utility model, further, a gear adjustment structure is arranged on the outer end face of the stator body, and the gear adjustment structure is connected with the adjusting blade to change the rotation angle of the adjusting blade. The gear adjustment structure is simple to manufacture and easy to repair. Using it to provide power for the adjusting blade is convenient for subsequent maintenance and saves costs.

[0008] According to the utility model, further, the cross section of the adjusting blade is strip-shaped, the left end of the cross section is an arc end, the opposite right end is a sharp angle, the upper end is a first straight line segment, which is connected to one end of the arc at the left end, the other end of the first straight line segment is connected to the sharp angle at the right end, the lower end includes a second straight line segment parallel to the first straight line segment, one end of which is connected to one end of the arc at the corresponding left end, and the other end is connected to the corresponding sharp angle at the right end through a transition arc, forming an airfoil cross section.

[0009] According to the utility model, further, the gear adjustment structure includes a first gear arranged on the back of the stator body and a circumferentially distributed second gear meshing with the stator body, the second gear has an adjustment shaft, one end of the adjustment shaft is connected to the adjustment blade at the corresponding position. The first gear and the second gear mesh and transmit, which increases the stability of the transmission and achieves more accurate power regulation.

[0010] According to the utility model, further, it also includes a mounting shaft connected to the output shaft of the test power device, and the mounting shaft connects the stator body and the rotor body.

[0011] According to the utility model, the adjusting blades are further distributed equidistantly along the circumference of the axis of the first accommodating cavity, so that during the adjustment of the adjusting blades, the liquid in the cavity is subjected to uniform force, thereby improving the accuracy of power regulation.

[0012] According to the utility model, further, the transition arc is located on one side close to the center of the first accommodating cavity.

[0013] According to the utility model, further, a plurality of rotor blades are evenly distributed on the inner cavity wall of the second accommodating cavity, and one end of each of the rotor blades points to the same point on the axis of the installation shaft.

[0014] According to the utility model, further, the height of the rotor blade is less than the height of the second accommodating cavity, and the height of the adjustment blade is equal to the height of the first accommodating cavity; when the rotor body and the stator body are buckled, there is a gap between the end surface of the adjustment blade and the end surface of the rotor blade. Thus, after the rotor body and the stator body are buckled, the rotor blade and the adjustment blade do not interfere with each other, ensuring that the adjustment blade rotates smoothly.

[0015] According to the utility model, further, the rotor body, the stator body and the installation shaft are coaxially arranged.

[0016] The beneficial effects brought about by the utility model are as follows: the utility model adopts airfoil adjustment blades, and by adjusting the rotation of the blades, the fluid domain is changed, so that the power of the dynamometer can be quickly adjusted during the operation of the equipment, and its adjustment range is increased. At the same time, the gear adjustment structure that provides power to it can well control the adjustment accuracy, thereby achieving the power adjustment accuracy of the dynamometer. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the stator body of the utility model from a first perspective;

[0018] Figure 2 It is a schematic diagram of the stator body of the utility model from a second viewing angle;

[0019] Figure 3 It is a schematic structural diagram of the rotor body of the utility model.

[0020] In the accompanying drawings:

[0021] 100 - mounting shaft, 200 - rotor body, 210 - second accommodating cavity, 220 - rotor blade, 300 - stator body, 310 - first accommodating cavity, 400 - adjusting blade, 410 - left end, 420 - right end, 430 - first straight segment, 440 - second straight segment, 450 - transition arc, 500 - first gear, 600 - second gear, 610 - adjusting shaft. Detailed implementation manners

[0022] In order to more clearly illustrate the purpose, advantages and features of the present utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that all the accompanying drawings are presented in a very simplified form and are not drawn according to the actual ratio. The purpose is only to facilitate and clearly assist in explaining the content of the embodiments of the present utility model. In addition, the structures shown in the accompanying drawings are usually only a part of the actual structures, and sometimes different scales are used to show due to different focuses of each accompanying drawing.

[0023] An embodiment of the present application provides a hydraulic dynamometer with adjustable power. Please refer to Figures 1 - 3 , which includes a mounting shaft 100 connected to the output shaft of a test power device. A rotor body 200 and a stator body 300 that jointly form a cavity structure are sleeved on the outer periphery of the mounting shaft 100. Liquid is injected into the cavity to form a resistance to the rotor body 200. The stator body 300 includes a gear adjustment structure for adjusting the water resistance in the cavity. The gear adjustment structure is connected to an external execution part, and a rotational force is provided to the gear adjustment structure through the external execution part, thereby changing the water resistance in the cavity, and thus realizing the adjustment of power.

[0024] Specifically, please refer to Figure 1, which is a schematic view of one side of the stator body 300 facing the rotor body 200. The stator body 300 has a first accommodation cavity 310 that faces the rotor body 200, the back surface of the stator body 300 faces the housing of the liquid dynamometer, and the gear adjustment structure is arranged on the back surface of the stator body 300. The installation shaft 100 passes through the first accommodation cavity 310, and their axes coincide; adjustment vanes 400 are arranged at the bottom of the first accommodation cavity 310 and are circumferentially distributed along the installation shaft 100; the adjustment vanes 400 adjust the angle through the gear adjustment structure. Preferably, the cross-section of the adjustment vane 400 is an airfoil shape, that is, the cross-section is strip-shaped, the left end 410 is arc-shaped, the opposite right end 420 is a sharp angle, the upper end is a first straight line segment 430, which is connected to one end of the arc of the left end 410, the other end of the first straight line segment 430 is connected to the sharp angle of the right end 420, the lower end includes a second straight line segment 440 parallel to the first straight line segment 430, one end of which is connected to one end of the arc of the corresponding left end 410, and the other end is connected to the sharp angle of the corresponding right end 420 through a transition arc 450, forming an airfoil cross-section.

[0025] Specifically, the gear adjustment structure includes a first gear 500 arranged on the back surface of the stator body 300 and a circumferentially distributed second gear 600 that is externally meshed with it. The second gear 600 has an adjustment shaft 610, and one end of the adjustment shaft 610 is connected to the adjustment vane 400 at the corresponding position; among them, the first gear 500 is coaxially arranged with the installation shaft 100. The first gear 500 is connected to an external execution part, and the external execution part provides power to drive the first gear 500 to rotate, and then drives the second gear 600 that is externally meshed with it to rotate, adjusting the angle of the adjustment vane 400, that is, the transition arc 450 approaches or moves away from the installation shaft 100. Among them, the adjustment angle of the adjustment vane 400 is based on not interfering with its surrounding components.

[0026] In this embodiment, the heads and tails of two adjacent adjustment vanes 400 are opposite to each other. The left end 410 is regarded as the head end, and the right end 420 is regarded as the tail end. Compared with the first straight line segment 430, the side with the transition arc 450 is closer to the installation shaft 100. The transition arc 450 can increase the distance between the adjustment vane 400 and the installation shaft 100, and it is not easy to interfere with the installation shaft 100 during the clockwise rotation of the adjustment vane 400, so that the range of angle change of the adjustment vane 400 can be increased, and the power change range can be further expanded. When the adjustment vane 400 rotates, it drives the liquid in the cavity formed by the stator body 300 and the rotor body 200

[0027] The rotor body 200 has a second accommodation cavity 210, the installation shaft 100 passes through the second accommodation cavity 210, and they are coaxial. A plurality of rotor blades 220 are equidistantly distributed along the cavity wall of the second accommodation cavity 210, and the rotor blades 220 all point to the same point on the axis of the installation shaft 300.

[0028] In this embodiment, the height of the rotor blade 220 is slightly less than the height of the second accommodating cavity 210, and the height of the adjusting blade 400 is adjusted to be equal to or slightly greater than the height of the first accommodating cavity 310. When the rotor body 200 and the stator body 300 are buckled, the end face of the adjusting blade 400 is not in contact with the end face of the rotor blade 220, so that the adjusting blade 400 can rotate smoothly.

[0029] The above is only the preferred embodiment of the present invention, and it does not impose any formal or substantial limitations on the present invention. It should be pointed out that for those of ordinary skill in the art in this technical field, without departing from the premise of the present invention, several improvements and supplements can still be made, and these improvements and supplements should also be regarded as the protection scope of the present invention. Any equivalent changes made by those who are familiar with the technology in this field without departing from the spirit and scope of the present invention by making some changes, modifications and evolutions using the technical content disclosed above are all equivalent embodiments of the present invention; at the same time, any equivalent changes made to the above embodiments based on the substantial technology of the present invention, including changes, modifications and evolutions, still fall within the scope of the technical solutions of the present invention.

Claims

1. A hydraulic dynamometer with adjustable power, wherein, including a stator body having a first accommodating cavity a rotor body having a second accommodating cavity; forming a cavity with the first accommodating cavity, and the cavity is filled with liquid adjusting vanes disposed in the first accommodating cavity, and an adjusting portion changes the resistance of the liquid filled in the cavity, thereby changing the power the adjusting vane has a tip and an arc end, and the two are connected by a transition arc 2. The hydraulic dynamometer with adjustable power according to claim 1, wherein, a gear adjusting structure is disposed on the outer end surface of the stator body, and the gear adjusting structure is connected to the adjusting vane to change the rotation angle of the adjusting vane 3. The hydraulic dynamometer with adjustable power according to claim 1 or 2, wherein, the cross section of the adjusting vane is strip-shaped, the left end of the cross section is an arc end, the opposite right end is a tip, the upper end is a first straight line segment connected to one end of the arc at the left end, the other end of the first straight line segment is connected to the sharp angle at the right end, the lower end includes a second straight line segment parallel to the first straight line segment, one end of which is connected to one end of the corresponding arc at the left end, and the other end is connected to the corresponding sharp angle at the right end through a transition arc, forming an airfoil cross section 4. The hydraulic dynamometer with adjustable power according to claim 2, wherein, the gear adjusting structure includes a first gear disposed on the back surface of the stator body and a circumferentially distributed second gear that meshes with it externally, the second gear has an adjusting shaft, and one end of the adjusting shaft is connected to the adjusting vane at the corresponding position 5. The hydraulic dynamometer with adjustable power according to claim 1, wherein, further includes a mounting shaft connected to the output shaft of the test power device, and the mounting shaft connects the stator body and the rotor body 6. The hydraulic dynamometer with adjustable power according to claim 1, wherein, the adjusting vanes are circumferentially equidistantly distributed along the axis of the first accommodating cavity 7. The hydraulic dynamometer with adjustable power according to claim 3, wherein, the transition arc is located on the side close to the center of the first accommodating cavity 8. A hydraulic dynamometer with adjustable power as claimed in claim 5, wherein, a plurality of rotor blades are equidistantly distributed on the inner cavity wall of the second accommodating cavity, and one end of each rotor blade points to the same point on the axis of the mounting shaft 9. The hydraulic dynamometer with adjustable power according to claim 8, wherein, the height of the rotor blade is less than the height of the second accommodating cavity, and the height of the adjusting vane is equal to the height of the first accommodating cavity; when the rotor body and the stator body are buckled, there is a gap between the end surface of the adjusting vane and the end surface of the rotor blade 10. A hydraulic dynamometer with adjustable power as described in claim 5, wherein, the rotor body, the stator body and the mounting shaft are coaxially arranged

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