Anti-drop control test device for sliding vane of double-crank sliding block type compressor

Abstract

The utility model relates to a slip sheet anti-drop control test device for a double-crank slider type compressor. The slip sheet anti-drop control test device comprises a compressor simulation device, an anti-drop control device and a limiting structure, the compressor simulation device comprises a rack, an equivalent structure and a servo motor, the equivalent structure is installed on the upper portion of the rack and connected with the servo motor, and the servo motor is installed on the lower portion of the rack; the anti-disengagement control device comprises an anti-disengagement control structure, a limiting structure and an anti-disengagement control structure servo motor, the anti-disengagement control structure is installed on the rack and connected with the anti-disengagement control structure servo motor, and the anti-disengagement control structure servo motor is installed on the lower portion of the rack; and the limiting structure is mounted on the rack and is connected with the anti-drop control structure. According to the utility model, the influence on the sliding vane of the compressor is tested by applying different pressures to the sliding vane in the compressor and replacing springs with different rigidities, so that the compressor can operate safely and stably, and the phenomenon that the sliding vane is out of control is avoided.

Description

Technical Field

[0001] The utility model relates to the research field of anti - detachment control of compressor sliding vanes, and particularly relates to an anti - detachment control test device for sliding vanes of a double - crank slider compressor. Background Art

[0002] For cams and structures with similar functions to cams, the phenomenon of the cam and the sliding vane detaching and getting out of control needs to be actively avoided. In a sliding vane compressor, there are an eccentric rotor and sliding vanes similar to the cam mechanism. Compared with a fixed - frequency compressor with a fixed speed, the speed of a variable - frequency compressor changes continuously according to the working requirements. Since the variable - frequency compressor still retains a spring with a fixed stiffness similar to that of the fixed - frequency compressor, when the speed of the variable - frequency compressor continues to increase, the phenomenon of the sliding vane separating from the eccentric rotor and getting out of control due to insufficient spring force will occur, which is the sliding vane out - of - control phenomenon of the compressor. The out - of - control of the compressor sliding vane will cause the direct connection between the low - pressure intake chamber and the high - pressure compression chamber of the compressor, resulting in the failure of the compression work of the compressor. When the compressor speed decreases, the sliding vane will collide and contact with the eccentric rotor again, and the frequent collision between the two will cause vibration noise of the compressor, and the service life of the compressor will be greatly reduced. Therefore, in order for the variable - frequency compressor to achieve a higher variable speed and work efficiently and stably, it is of great significance to study the process of sliding vane out - of - control of the compressor and different methods to prevent sliding vane out - of - control. Therefore, there is an urgent need to design a test device with an anti - detachment control function for experimental research. Content of the Utility Model

[0003] In order to study the influence of different pre - tightening forces and different spring rigidity conditions on the compressor and the sliding vane, the utility model provides an anti - detachment control test device for sliding vanes of a double - crank slider compressor. By simulating the compressor with this test device, in a working environment where the working chamber is full of oil and there is no pressure difference, observe the out - of - control phenomenon between the sliding vane and the rotor during the rotation of the rotor, so as to study the influence brought by the out - of - control of the compressor sliding vane.

[0004] To solve the above - mentioned technical problems, the utility model adopts the following technical solutions:

[0005] An anti - detachment control test device for sliding vanes of a double - crank slider compressor, the components include a compressor simulation and observation device and an anti - detachment control device. The specific structures and connection relationships of the components are as follows:

[0006] The compressor simulation device includes a frame, an equivalent structure, and a servo motor. The equivalent structure includes a compressor cylinder, a sliding vane, a spring, a limit plate, an eccentric shaft, and a rotor. The compressor cylinder is fixed on the upper surface of the frame. The sliding vane is installed on the chute of the compressor cylinder. The spring is installed on the back of the sliding vane. The limit plate is fixed on the upper surface of the compressor cylinder. The space between the eccentric shaft and the compressor cylinder forms a working chamber that simulates a compressor. The eccentric shaft is provided with a rotor. There is an annular step on the axis of the eccentric shaft. The eccentric shaft is connected to the servo motor;

[0007] The anti-disengagement control device includes an anti-disengagement control structure, a limit structure, and an anti-disengagement control structure servo motor. The anti-disengagement control structure includes an active crank-slider structure, a driven crank-slider structure, an active bevel gear, a driven bevel gear, a driven bevel gear bearing seat, a spring block, a spring block guide shaft, and a guide shaft bearing seat. The anti-disengagement control structure servo motor is installed on the frame. The anti-disengagement control structure servo motor is connected to the active bevel gear. The connecting shaft of the active bevel gear fixes the active crank-slider structure. The active bevel gear meshes with the driven bevel gear. The connecting shaft of the driven bevel gear fixes the driven crank-slider structure. The driven bevel gear is installed on the frame through the driven bevel gear bearing seat;

[0008] The spring block is installed behind the spring. A pressure sensor is provided between the spring block and the spring. The spring block is sleeved on the spring block guide shaft. The spring block guide shaft is fixed on the guide shaft bearing seat. The guide shaft bearing seat is installed on the frame;

[0009] The lower end of the limit structure is installed at the lower part of the frame. The upper end of the limit structure is in the groove on the lower surface of the spring block.

[0010] The limit structure includes a front limit switch, a rear limit switch, and a limit switch fixing shaft. The lower end of the limit switch fixing shaft is fixed on the frame. One side of the upper end of the limit switch fixing shaft installs the front limit switch, and the other side installs the rear limit switch. The front limit switch and the rear limit switch are in the groove on the lower surface of the spring block.

[0011] The active crank-slider structure includes an active crank-slider structure short rod and an active crank-slider structure long rod. One end of the active crank-slider structure short rod is fixedly connected to the connecting shaft of the active bevel gear, and the other end is connected to the active crank-slider structure long rod. The active crank-slider structure long rod is connected to the spring block.

[0012] The driven crank-slider structure includes a driven crank-slider structure short rod, a driven crank-slider structure long rod, and a long rod shaft. One end of the driven crank-slider structure short rod is fixed on the connecting shaft of the driven bevel gear, and the other end is connected to the driven crank-slider structure long rod. The driven crank-slider structure long rod is connected to the spring block through the long rod shaft.

[0013] As a further improvement, the working chamber is filled with oil.

[0014] As a further improvement, the working environment inside the working chamber has no pressure difference.

[0015] Compared with the prior art, the present utility model has the following beneficial effects:

[0016] 1. By using a synchronous equivalent compressor simulation observation device to simulate the motion state of the compressor sliding vane, the out-of-control situation of the sliding vane is observed under the condition of no pressure difference and a pure oil working chamber, which has the same effect on studying the out-of-control situation of the compressor sliding vane.

[0017] 2. It has the advantage of being convenient to change the instantaneous pre-tightening force of the spring, and can better explore the influence of this factor on the out-of-control phenomenon of the compressor sliding vane.

[0018] 3. By adjusting the position of the spring stop block, the influence of different pre-tightening forces on the out-of-control of the compressor sliding vane can be tested under the same spring.

[0019] 4. By replacing different springs and adjusting the position of the spring stop block, the influence of different spring rigidities and the same pre-tightening force on the out-of-control of the compressor sliding vane can be tested.

[0020] 5. Through the combination of the driven crank-slider structure, the active crank-slider structure and the anti-out-of-control servo motor, the influence of the instantaneous pre-tightening force of the spring on the out-of-control of the compressor sliding vane can be tested in real time within one working cycle of the compressor.

[0021] 6. A limit structure is added, which can stop immediately through the limit when the anti-out-of-control structure servo motor 6 of the driving anti-out-of-control structure suddenly fails, avoiding excessive compression and stretching of the spring.

[0022] 7. The double crank-slider structure is adopted, and the stability and reliability of the test device can be ensured by means of structural redundancy constraint, which is beneficial to improving the safety of the experiment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic structural diagram of the double crank-slider type compressor sliding vane anti-out-of-control device of the present utility model.

[0024] Figure 2 It is a side view of the double crank-slider type compressor sliding vane anti-out-of-control device of the present utility model.

[0025] Figure 3 It is a front view of the double crank-slider type compressor sliding vane anti-out-of-control device of the present utility model.

[0026] Figure 4It is the top view of the anti - detachment and control device for the sliding vane of the double - crank slider compressor described in the present utility model.

[0027] The markings in the figure are: frame 1, equivalent structure 2, servo motor 3, anti - detachment and control structure 4, limit structure 5, servo motor of anti - detachment and control structure 6, compressor cylinder 7, sliding vane 8, spring 9, limit plate 10, eccentric shaft 11, rotor 12, active crank - slider structure 13, driven crank - slider structure 14, active bevel gear 15, driven bevel gear 16, bearing seat of driven bevel gear 17, spring block 18, guide shaft of spring block 19, guide shaft bearing seat 20, front limit switch 21, rear limit switch 22, fixed shaft of limit switch 23, short rod of active crank - slider structure 24, long rod of active crank - slider structure 25, short rod of driven crank - slider structure 26, long rod of driven crank - slider structure 27, long rod shaft 28, pressure sensor 29. Specific embodiments

[0028] The technical solution of the present utility model will be further described below in conjunction with the drawings and embodiments.

[0029] As Figures 1 to 4 shown, the anti - detachment and control device for the sliding vane of the double - crank slider compressor described in the present utility model includes a compressor simulation and observation device and an anti - detachment and control device. The compressor simulation device includes a frame 1, an equivalent structure 2 and a servo motor 3. The equivalent structure is installed on the upper part of the frame. The equivalent structure includes a compressor cylinder 7, a sliding vane 8, a spring 9, a limit plate 10, an eccentric shaft 11 and a rotor 12. The compressor cylinder 7 is fixed on the upper surface of the frame 1. The sliding vane 8 is installed on the sliding groove of the compressor cylinder 7. The spring 9 is installed on the back of the sliding vane 8. The limit plate 10 is fixed on the upper surface of the compressor cylinder 7. The space between the eccentric shaft 11 and the compressor cylinder 7 forms a working chamber of the simulated compressor. The eccentric shaft 11 is installed with a rotor 12. The axis of the eccentric shaft 11 has an annular step. The eccentric shaft 11 is connected to the servo motor 3.

[0030] The anti - detachment and control device includes an anti - detachment and control structure 4, a limit structure 5 and a servo motor of anti - detachment and control structure 6. The anti - detachment and control structure 4 includes an active crank - slider structure 13, a driven crank - slider structure 14, an active bevel gear 15, a driven bevel gear 16, a bearing seat of driven bevel gear 17, a spring block 18, a guide shaft of spring block 19 and a guide shaft bearing seat 20. The spring block 18 is installed behind the spring 9. A pressure sensor is arranged between the spring block 18 and the spring 9. One ends of the long rod 25 of the active crank - slider structure and the long rod 27 of the driven crank - slider structure of the active crank - slider structure 13 are fixed on different sides of the spring block 18 to prevent the slider from deflecting, and the stability of the reciprocating motion of the spring block 18 is ensured through redundant constraints.

[0031] The anti-disengagement structure servo motor 6 is installed on the frame 1. The anti-disengagement structure servo motor 6 is connected to the driving bevel gear 15. The connecting shaft of the driving bevel gear 15 fixes the driving crank-slider structure 13. The driving bevel gear 15 meshes with the driven bevel gear 16. The connecting shaft of the driven bevel gear 16 fixes the driven crank-slider structure 14. The driven bevel gear 16 is installed on the upper part of the frame 1 through the driven bevel gear bearing seat 17. The connecting shaft of the driving bevel gear 15 is fixed on the frame through a bearing, and the connecting shaft of the driving bevel gear 15 can rotate relative to the frame.

[0032] The driving crank-slider structure 13 includes a short rod 24 of the driving crank-slider structure and a long rod 25 of the driving crank-slider structure. One end of the short rod 24 of the driving crank-slider structure is fixed on the connecting shaft of the driving bevel gear 15, and the other end is connected to one end of the long rod 25 of the driving crank-slider structure. The other end of the long rod 25 of the driving crank-slider structure is connected to the spring stopper 18.

[0033] The driven crank-slider structure 14 includes a short rod 26 of the driven crank-slider structure, a long rod 27 of the driven crank-slider structure, and a long rod shaft 28. One end of the short rod 26 of the driven crank-slider structure is fixed on the connecting shaft of the driven bevel gear 16, and the other end is connected to one end of the long rod 27 of the driven crank-slider structure. The other end of the long rod 27 of the driven crank-slider structure is connected to the spring stopper 18 through the long rod shaft 28, and the long rod 27 of the driven crank-slider structure and the long rod shaft 28 are movably connected.

[0034] The other end of the long rod 25 of the driving crank-slider structure is connected to the spring stopper 18, and the other end of the long rod 27 of the driven crank-slider structure is connected to the spring stopper 18 through the long rod shaft 28. The purpose is to prevent the spring stopper from deflecting and ensure the stability of the reciprocating motion of the slider through redundant constraints.

[0035] The spring stopper 18 is sleeved on the spring stopper guide shaft 19. The spring stopper guide shaft 19 is fixed on the guide shaft bearing seat 20. The guide shaft bearing seat 20 is installed on the frame 1. The limiting structure 5 includes a front limit switch 21, a rear limit switch 22, and a limit switch fixing shaft 23. The lower end of the limit switch fixing shaft 23 is installed and fixed on the lower part of the frame 1. One side of the upper end of the limit switch fixing shaft 23 installs the front limit switch 21, and the other side installs the rear limit switch 22. The upper end of the limit switch fixing shaft 23 is arranged in the groove on the lower surface of the spring stopper 18.

[0036] This utility model studies how to prevent the compressor sliding vane from getting out of control by simulating a compressor and observing the situation of the sliding vane 8 getting out of control under the operation of the eccentric shaft 11 driving the rotor 12.

[0037] Working principle and process: As Figure 1As shown, the equivalent structure 2 is used to simulate the motion state of the internal structure of the compressor; observe the motion process of the sliding vane 8 and the rotor 12 in the simulated structure. A spring 9 is installed on the back of the sliding vane 8, and a spring stopper 18 and the entire anti-disengagement control structure 4 are installed on the back of the spring 9. A pressure sensor is provided between the spring 9 and the spring stopper 18 to measure the pre-tightening force of the spring and determine whether disengagement occurs. The working principle of the anti-disengagement control structure 4 is to drive the forward and backward movement of the spring stopper 18 through the swinging of the active crank-slider structure 13 and the driven crank-slider structure 14, giving the spring stopper 18 a force pointing to the spring 9, so as to make the sliding vane 8 closely adhere to the rotor 12 and prevent the occurrence of disengagement. The servo motor 3 is used to provide power for the simulated structure 2, and the anti-disengagement control structure servo motor 6 is used to provide power for the anti-disengagement control structure 4. It should be noted that the anti-disengagement control structure servo motor 6 does not perform circular motion, but rotates forward and backward within a certain angle. The positions of its forward and backward rotation conversions are determined by the front limit switch 21 and the rear limit switch 22. During the test, oil can also be injected into the compressor cylinder 7 to avoid damage to the equivalent structure 2 caused by lack of oil.

[0038] The above description is a detailed description of the preferred and feasible embodiments of the present invention, but the embodiments are not intended to limit the scope of the patent application of the present invention. Any equivalent changes or modifications made under the technical spirit disclosed by the present invention shall fall within the scope of the patent covered by the present invention.

Claims

1. A double-crank slider type compressor vane anti-disengagement control test device, characterized in that: The components include a compressor simulation device and an anti-disconnection control device. The specific structure and connection relationship of the components are as follows: The compressor simulation device includes a frame, an equivalent structure, and a servo motor. The equivalent structure includes a compressor cylinder, a sliding vane, a spring, a limit plate, an eccentric shaft, and a rotor. The compressor cylinder is fixed on the upper surface of the frame. The sliding vane is installed on the chute of the compressor cylinder. The spring is installed on the back of the sliding vane. The limit plate is fixed on the upper surface of the compressor cylinder. The space between the eccentric shaft and the compressor cylinder forms a working chamber simulating a compressor. The eccentric shaft is provided with a rotor, and the eccentric shaft is connected to the servo motor; The anti-disconnection control device includes an anti-disconnection control structure, a limit structure, and an anti-disconnection control structure servo motor. The anti-disconnection control structure includes an active crank-slider structure, a driven crank-slider structure, an active bevel gear, a driven bevel gear, a driven bevel gear bearing seat, a spring block, a spring block guide shaft, and a guide shaft bearing seat. The anti-disconnection control structure servo motor is installed on the frame. The anti-disconnection control structure servo motor is connected to the active bevel gear. The connecting shaft of the active bevel gear fixes the active crank-slider structure. The active bevel gear meshes with the driven bevel gear. The connecting shaft of the driven bevel gear fixes the driven crank-slider structure. The driven bevel gear is installed on the frame through the driven bevel gear bearing seat; The spring block is installed behind the spring. A pressure sensor is provided between the spring block and the spring. The spring block is sleeved with the spring block guide shaft. The spring block guide shaft is fixed on the guide shaft bearing seat. The guide shaft bearing seat is installed on the frame; The lower end of the limit structure is installed at the lower part of the frame, and the upper end of the limit structure is in the groove on the lower surface of the spring block.

2. The double-crank slider type compressor vane anti-disengagement control test device according to claim 1, wherein: The limit structure includes a front limit switch, a rear limit switch, and a limit switch fixing shaft. The lower end of the limit switch fixing shaft is fixed on the frame. One side of the upper end of the limit switch fixing shaft installs the front limit switch, and the other side installs the rear limit switch. The front limit switch and the rear limit switch are in the groove on the lower surface of the spring block.

3. The double-crank slider type compressor vane anti-detachment control test device according to claim 1, wherein: The active crank-slider structure includes an active crank-slider structure short rod and an active crank-slider structure long rod. One end of the active crank-slider structure short rod is fixedly connected to the connecting shaft of the active bevel gear, and the other end is connected to the active crank-slider structure long rod. The active crank-slider structure long rod is connected to the spring block.

4. The double-crank slider type compressor vane anti-detachment control test device according to claim 1, wherein: The driven crank-slider structure includes a driven crank-slider structure short rod, a driven crank-slider structure long rod, and a long rod shaft. One end of the driven crank-slider structure short rod is fixed on the connecting shaft of the driven bevel gear, and the other end is connected to the driven crank-slider structure long rod. The driven crank-slider structure long rod is connected to the spring block through the long rod shaft.

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