CN109114051B - Variable load tooling - Google Patents

Abstract

The invention discloses a variable load tooling, which belongs to the field of testing devices. The variable load tooling includes a pressure bearing block, a pressure shaft and a hydraulic loading system. There is a cylindrical pressure chamber inside the pressure bearing block. There are also shaft holes, oil inlet holes, and oil outlet holes on the pressure bearing block. The shaft holes are located at the pressure At one end of the cavity, the pressure shaft is inserted into the shaft hole. The first end of the pressure shaft is provided with a coupling, and the second end of the pressure shaft is provided with an outer flange. The oil inlet hole and the shaft hole are respectively located on the opposite side of the outer flange. The oil inlet and outlet holes are located on the same side of the outer flange. After the pressure chamber is pressurized, the outer flange can be pressed against the inner wall of the pressure chamber. During running-in, the pressure shaft can be connected with the output shaft of the device to be run-in through a coupling, and the friction force between the outer flange and the inner wall of the pressure chamber is equivalent to the load acting on the output shaft of the device to be run-in, so that The working conditions during running-in are the same as those during actual use, thereby improving the running-in effect and shortening the running-in time.

Description

Variable load tooling

technical field

The invention relates to the field of testing devices, in particular to a variable load tooling.

Background technique

In industrial production, a lot of equipment needs to be run-in after the production is completed and before the official use, so that the equipment will be more stable when it is officially used.

Take the gearbox as an example. After the production is completed, the input shaft of the gearbox is usually driven by a motor or other power to make the gears in the gearbox rotate and run in.

Since the gearbox is actually working, in addition to the input shaft having power input, the output shaft also has a load, and during the running-in, the output shaft is in an unloaded state, which makes the working conditions of the gearbox during the running-in and the actual use of the gearbox The working conditions are different, resulting in poor running-in effect and long running-in time.

Contents of the invention

The embodiment of the present invention provides a variable load tool, which can improve the running-in effect and shorten the running-in time. Described technical scheme is as follows:

The embodiment of the present invention provides a variable load tooling, including a pressure bearing block, a pressure shaft and a hydraulic loading system, a cylindrical pressure chamber is arranged in the pressure bearing block, and a shaft hole, Oil inlet hole, oil outlet hole, the shaft hole, the oil inlet hole and the oil outlet hole are all connected to the pressure chamber and the outer surface of the pressure bearing block, and the shaft hole is located at the pressure chamber One end, and the axis of the shaft hole is parallel to the axis of the pressure chamber, the cross section of the shaft hole is smaller than the cross section of the pressure chamber, the pressure shaft is inserted in the shaft hole, and the The first end of the pressure shaft is exposed outside the pressure bearing block, the first end of the pressure shaft is provided with a coupling, the second end of the pressure shaft is located in the pressure chamber, and the second end of the pressure shaft The two ends are provided with an outer flange extending outward along the radial direction of the pressure shaft, the outer peripheral wall of the outer flange is slidingly sealed with the inner wall of the pressure chamber, and the oil inlet hole and the shaft hole are respectively located On opposite sides of the outer flange, the oil inlet hole and the oil outlet hole are located on the same side of the outer flange, and the hydraulic loading system communicates with the oil inlet hole and the oil outlet hole , the hydraulic loading system is configured to controllably pressurize the pressure chamber and keep the pressure of the pressure chamber constant.

Optionally, the pressure bearing block includes a detachably connected block body and a stopper, the stopper is located at one end of the pressure chamber, and the orthographic projection of the pressure chamber on the stopper is located at the end of the stopper In the end surface of the block close to the pressure chamber, the shaft hole is located on the block.

Optionally, a sealing ring is provided between the block body and the stopper.

Optionally, the stopper is screwed to the block body.

Optionally, the hydraulic loading system includes an oil tank, a loading pump, a one-way valve, a pressure gauge and a stop valve, the oil inlet of the loading pump communicates with the oil tank, and the oil outlet of the loading pump communicates with the The oil inlet of the one-way valve is connected, the oil outlet of the one-way valve is connected with the oil inlet, the oil outlet of the one-way valve is also connected with a pressure gauge, and the oil outlet is connected with the cut-off hole. The oil inlet of the valve is connected, and the oil outlet of the cut-off valve is connected with the oil tank.

Optionally, the hydraulic loading system further includes a relief valve, the oil inlet and the pilot oil port of the relief valve are both connected to the oil outlet of the loading pump, and the oil outlet of the relief valve is connected to the The fuel tank is connected.

Optionally, the hydraulic loading system further includes a filter connected between the oil outlet of the loading pump and the oil inlet of the one-way valve.

Optionally, a liquid level gauge is provided in the oil tank.

Optionally, an air filter is provided on the fuel tank.

Optionally, an oil discharge valve is provided on the oil tank.

The beneficial effect brought by the technical solution provided by the embodiment of the present invention is: by setting a pressure chamber in the pressure-bearing block, and setting an oil inlet and an oil outlet on the pressure-bearing block, the pressure chamber can be loaded by the hydraulic loading system. pressure. The pressure shaft is inserted into the shaft hole by setting the shaft hole on the pressure bearing block. Since the pressure shaft is provided with an outer flange, the outer flange is slidingly sealed with the inner wall of the pressure chamber, and the cross section of the shaft hole is smaller than that of the pressure chamber. In the cross section, the oil inlet hole and the shaft hole are respectively located on the opposite sides of the outer flange, and the oil inlet hole and the oil outlet hole are located on the same side of the outer flange, so after the pressure chamber is pressurized, the outer flange can be compressed On the inner wall of the pressure chamber, and the greater the pressure in the pressure chamber, the greater the pressing force of the outer flange acting on the inner wall of the pressure chamber. Frictional force is generated between the outer flange and the inner wall of the pressure chamber, and the magnitude of the frictional force can be adjusted by changing the pressing force of the outer flange on the inner wall of the pressure chamber. During running-in, the pressure shaft can be connected with the output shaft of the device to be run-in through the coupling on the pressure shaft, and the friction between the outer flange and the inner wall of the pressure chamber is equivalent to acting on the output shaft of the device to be run-in The load can be changed by changing the magnitude of the friction force, so that the working conditions during running-in are the same as the working conditions during actual use, thereby improving the running-in effect and shortening the running-in time.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained based on these drawings without creative effort.

Fig. 1 is a structural diagram of a variable load tooling provided by an embodiment of the present invention;

Fig. 2 is a schematic diagram of a hydraulic loading system provided by an embodiment of the present invention.

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

FIG. 1 is a structural diagram of a variable load tool provided by an embodiment of the present invention. As shown in FIG. 1 , the variable load tool includes a pressure bearing block 10 , a pressure shaft 20 and a hydraulic loading system 30 .

A columnar pressure chamber 11a is disposed inside the pressure block 10 . The bearing block 10 is further provided with a shaft hole 12a, an oil inlet hole 11b, and an oil outlet hole 11c. The shaft hole 12 a , the oil inlet hole 11 b and the oil outlet hole 11 c all communicate with the pressure chamber 11 a and the outer surface of the pressure bearing block 10 .

Wherein, the shaft hole 12a is located at one end of the pressure chamber 11a, and the axis of the shaft hole 12a is parallel to the axis of the pressure chamber 11a. The cross section of the shaft hole 12a is smaller than the cross section of the pressure chamber 11a.

The pressure shaft 20 is inserted into the shaft hole 12 a, and the first end of the pressure shaft 20 is exposed outside the pressure bearing block 10 . The first end of the pressure shaft 20 is provided with a coupling 22 . The second end of the pressure shaft 20 is located in the pressure chamber 11a. The second end of the pressure shaft 20 is provided with an outer flange 21 extending outward along the radial direction of the pressure shaft 20 , and the outer peripheral wall of the outer flange 21 is in sliding seal with the inner wall of the pressure chamber 11a.

The oil inlet hole 11b and the shaft hole 12a are respectively located on opposite sides of the outer flange 21 , and the oil inlet hole 11b and the oil outlet hole 11c are located on the same side of the outer flange 21 . The hydraulic charging system 30 communicates with the oil inlet hole 11b and the oil outlet hole 11c. The hydraulic charging system 30 is configured to controllably pressurize the pressure chamber 11a and keep the pressure of the pressure chamber 11a constant.

In the embodiment of the present invention, a pressure chamber is provided in the pressure bearing block, and an oil inlet and an oil outlet are arranged on the pressure bearing block, so that the pressure chamber can be pressurized by a hydraulic loading system. The pressure shaft is inserted into the shaft hole by setting the shaft hole on the pressure bearing block. Since the pressure shaft is provided with an outer flange, the outer flange is slidingly sealed with the inner wall of the pressure chamber, and the cross section of the shaft hole is smaller than that of the pressure chamber. In the cross section, the oil inlet hole and the shaft hole are respectively located on the opposite sides of the outer flange, and the oil inlet hole and the oil outlet hole are located on the same side of the outer flange, so after the pressure chamber is pressurized, the outer flange can be compressed On the inner wall of the pressure chamber, and the greater the pressure in the pressure chamber, the greater the pressing force of the outer flange acting on the inner wall of the pressure chamber. Frictional force is generated between the outer flange and the inner wall of the pressure chamber, and the magnitude of the frictional force can be adjusted by changing the pressing force of the outer flange on the inner wall of the pressure chamber. During running-in, the pressure shaft can be connected with the output shaft of the device to be run-in through the coupling on the pressure shaft, and the friction between the outer flange and the inner wall of the pressure chamber is equivalent to acting on the output shaft of the device to be run-in The load can be changed by changing the magnitude of the friction force, so that the working conditions during running-in are the same as the working conditions during actual use, thereby improving the running-in effect and shortening the running-in time.

As shown in FIG. 1 , the pressure bearing block 10 may include a block body 11 and a stopper 12 that are detachably connected. The stopper 12 is located at one end of the pressure chamber 11 a , the orthographic projection of the pressure chamber 11 a on the stopper 12 is located in the end surface of the stopper 12 close to the pressure chamber 11 a , and the shaft hole 12 a is located on the stopper 12 . By arranging the pressure bearing block 10 into two detachable parts, the assembly of the pressure shaft 20 can be facilitated.

Optionally, the block 12 can be screwed to the block body 11 . The threaded connection not only has good sealing performance, but also is easy to assemble and disassemble.

Further, a sealing ring 40 may also be provided between the block body 11 and the stopper 12 . The seal between the block 12 and the block body 11 is further improved by the sealing ring 40 to reduce leakage. The outer diameter of the sealing ring 40 can be 2-2000 mm, which can withstand higher pressure, and can still provide better sealing performance when the pressure reaches 45 MPa and the linear velocity of the edge of the outer flange 21 reaches 15 m/s.

A gap may be provided between the pressure shaft 20 and the shaft hole 12a, so that the air between the outer flange 21 and the stopper 12 can be easily discharged.

Fig. 2 is a schematic diagram of a hydraulic loading system provided by an embodiment of the present invention. As shown in FIG. 2 , the hydraulic loading system 30 may include an oil tank 31 , a loading pump 32 , a one-way valve 33 , a pressure gauge 34 and a stop valve 35 . Wherein, the oil inlet of the loading pump 32 is communicated with the oil tank 31, the oil outlet of the loading pump 32 is communicated with the oil inlet of the one-way valve 33, the oil outlet of the one-way valve 33 is communicated with the oil inlet 11b, and the one-way valve The oil outlet of 33 is also connected with a pressure gauge 34, the oil outlet 11c communicates with the oil inlet of the stop valve 35, and the oil outlet of the stop valve 35 communicates with the oil tank 31. When running in, the stop valve 35 can be closed first, the pressure chamber 11a can be pressurized by the loading pump 32, the pressure in the pressure chamber 11a can be obtained by the pressure gauge 34, and the loading pump 32 can be closed when the pressure reaches the required value. The return flow of hydraulic oil is prevented by the one-way valve 33, so that the pressure in the pressure chamber 11a is kept constant. When the running-in is finished, the stop valve 35 can be opened to release the pressure in the pressure chamber 11a.

Optionally, the hydraulic loading system 30 may also include a relief valve 36 . Both the oil inlet and the pilot oil port of the overflow valve 36 communicate with the oil outlet of the loading pump 32 , and the oil outlet of the overflow valve 36 communicates with the oil tank 31 . After setting the overflow valve 36, the pressure of the pressure chamber 11a can be adjusted to the required size more accurately. Specifically, the stop valve 35 can be closed first, the opening pressure of the overflow valve 36 is set to the required pressure in the pressure chamber 11a, and then the loading pump 32 is opened, and the pressure in the pressure chamber 11a rises to the opening of the overflow valve 36. Before the pressure, the overflow valve 36 remains closed all the time. When the pressure in the pressure chamber 11a rises to the opening pressure of the overflow valve 36, the overflow valve 36 opens, and the pressure in the pressure chamber 11a no longer rises.

Optionally, the hydraulic loading system 30 may further include a filter 37 connected between the oil outlet of the loading pump 32 and the oil inlet of the one-way valve 33 . The filter 37 can filter the hydraulic oil to prevent impurities in the hydraulic oil from damaging the hydraulic loading system 30 .

Optionally, an air filter 37 may also be provided on the oil tank 31 . When hydraulic oil is added to the oil tank 31 , it can be done through the air filter 37 , which can filter out impurities in the hydraulic oil and the air, so as to prevent the impurities from causing damage to the hydraulic loading system 30 .

Optionally, a liquid level gauge 38 may be provided in the oil tank 31 . The remaining oil quantity in the oil tank 31 is detected by the liquid level gauge 38 to ensure that there is sufficient hydraulic oil in the oil tank 31 for use.

Optionally, an oil discharge valve 311 may also be provided on the oil tank 31 . When the variable load tool is not used for a long time, the hydraulic oil in the oil tank 31 can be discharged through the oil discharge valve 311 .

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection of the present invention. within range.

Claims (10)

1. The variable load tool is characterized by comprising a pressure bearing block (10), a pressure shaft (20) and a hydraulic loading system (30), wherein a cylindrical pressure cavity (11a) is arranged in the pressure bearing block (10), the pressure bearing block (10) is further provided with a shaft hole (12a), an oil inlet hole (11b) and an oil outlet hole (11c), the shaft hole (12a), the oil inlet hole (11b) and the oil outlet hole (11c) are communicated with the pressure cavity (11a) and the outer surface of the pressure bearing block (10), the shaft hole (12a) is located at one end of the pressure cavity (11a), the axis of the shaft hole (12a) is parallel to the axis of the pressure cavity (11a), the cross section of the shaft hole (12a) is smaller than that of the pressure cavity (11a), the pressure shaft (20) is inserted into the shaft hole (12a), and the first end of the pressure shaft (20) is exposed out of the pressure bearing block (10), a coupling (22) is arranged at the first end of the pressure shaft (20), the second end of the pressure shaft (20) is positioned in the pressure cavity (11a), the second end of the pressure shaft (20) is provided with an outer flange (21) extending outwards along the radial direction of the pressure shaft (20), the peripheral wall of the outer flange (21) is in sliding sealing with the inner wall of the pressure chamber (11a), the oil inlet hole (11b) and the shaft hole (12a) are respectively positioned at two opposite sides of the outer flange (21), the oil inlet hole (11b) and the oil outlet hole (11c) are positioned on the same side of the outer flange (21), the hydraulic loading system (30) is communicated with the oil inlet hole (11b) and the oil outlet hole (11c), the hydraulic loading system (30) is configured to controllably pressurize the pressure chamber (11a) and to make the pressure of the pressure chamber (11a) constant.

2. The variable load tool according to claim 1, wherein the pressure bearing block (10) comprises a block body (11) and a stop block (12) which are detachably connected, the stop block (12) is located at one end of the pressure cavity (11a), an orthographic projection of the pressure cavity (11a) on the stop block (12) is located in an end face, close to the pressure cavity (11a), of the stop block (12), and the shaft hole (12a) is located on the stop block (12).

3. The variable load tooling as claimed in claim 2, wherein a sealing ring (40) is arranged between the block-shaped body (11) and the stop block (12).

4. The variable load tooling as claimed in claim 2, wherein the stop block (12) is in threaded connection with the block-shaped body (11).

5. The variable load tool according to any one of claims 1 to 4, wherein the hydraulic loading system (30) comprises an oil tank (31), a loading pump (32), a one-way valve (33), a pressure gauge (34) and a stop valve (35), an oil inlet of the loading pump (32) is communicated with the oil tank (31), an oil outlet of the loading pump (32) is communicated with an oil inlet of the one-way valve (33), an oil outlet of the one-way valve (33) is communicated with the oil inlet hole (11b), the oil outlet of the one-way valve (33) is further connected with the pressure gauge (34), the oil outlet hole (11c) is communicated with the oil inlet of the stop valve (35), and an oil outlet of the stop valve (35) is communicated with the oil tank (31).

6. The variable load tool according to claim 5, wherein the hydraulic loading system (30) further comprises an overflow valve (36), an oil inlet and a pilot oil port of the overflow valve (36) are both communicated with an oil outlet of the loading pump (32), and an oil outlet of the overflow valve (36) is communicated with the oil tank (31).

7. The variable load tooling of claim 5, wherein the hydraulic loading system (30) further comprises a filter (37), the filter (37) being connected between an oil outlet of the loading pump (32) and an oil inlet of the check valve (33).

8. The variable load tooling as claimed in claim 5, wherein a liquid level meter (38) is arranged in the oil tank (31).

9. The variable load frock of claim 5, characterized in that, be equipped with air cleaner (37) on the oil tank (31).

10. The variable load frock of claim 5, characterized in that, be equipped with oil drain valve (311) on the oil tank (31).