Molecular pump convenient dynamic balance adjusting tool

Abstract

The utility model relates to a molecular pump convenient adjusting balance tool, which comprises a vibration measuring pump shell, a speed measuring cover, an upper cover, a vibration measuring nail and a lower cover, the speed measuring cover is arranged at the upper tail end of the vibration measuring pump shell, the upper surface of the speed measuring cover is sunken downwards to form a sunken part, a through hole is formed at the bottom of the sunken part, and the lower tail end of the upper cover is arranged in the through hole. An opening is formed in the side wall of the lower tail end of the vibration measuring pump shell, the lower cover is installed on the vibration measuring pump shell, the molecular pump comprises a pump body and a turbine, the turbine is installed at the axial center position of the pump body, the bottom of the vibration measuring pump shell is connected to the outer circle of the pump body and covers the turbine, and the upper tail end of the vibration measuring pump shell and the lower tail end of the pump body are each provided with a screw hole. An external thread is formed on the vibration measuring nail, and the vibration measuring nail is installed at the upper tail end of the vibration measuring pump shell and the lower tail end of the pump body through screwing fit between the external thread on the vibration measuring nail and a screw hole in the pump body. When the device is used, the speed measuring device, the vibration measuring device and the vibration measuring pump shell do not need to be moved, and the balance adjusting efficiency is greatly improved.

Description

Technical Field

[0001] This utility model relates to a convenient adjustment and balancing tooling for a molecular pump. Background Technology

[0002] When performing dynamic balancing on a molecular pump, it is necessary to frequently add or remove counterweight screws at both the top and bottom of the turbine. This inevitably involves repeated movement of measuring equipment and repeated disassembly and reassembly of the pump casing. This method mainly causes two problems: first, repeated disassembly and reassembly waste a lot of time, resulting in low efficiency in balancing; second, repeated movement of measuring equipment leads to unstable measurement values, making it difficult to control the accuracy of dynamic balancing.

[0003] Therefore, it is indeed necessary to improve existing technologies to address their shortcomings. Summary of the Invention

[0004] This invention provides a convenient adjustment and balancing fixture for a molecular pump to solve the problems existing in the prior art. It enables the quick installation and removal of the counterweight screws without moving the measuring equipment or disassembling the pump casing.

[0005] This utility model adopts the following technical solution: a convenient adjustment and balancing tooling for a molecular pump, including a vibration measuring pump housing, a speed measuring cover, an upper cover, a vibration measuring nail, and a lower cover. The speed measuring cover is installed at the upper end of the vibration measuring pump housing. The upper surface of the speed measuring cover is recessed downward to form a recessed part. A through hole is formed at the bottom of the recessed part. The lower end of the upper cover is installed in the through hole. An opening is formed on the side wall of the lower end of the vibration measuring pump housing. The lower cover is installed on the vibration measuring pump housing by installing screws at its four corners. The molecular pump includes a pump body and a turbine installed together with the pump body. The turbine is installed at the axial center of the pump body. The bottom of the vibration measuring pump housing is threaded to the outer circle of the pump body and covers the turbine. A screw hole is formed at the upper end of the vibration measuring pump housing and the lower end of the pump body, respectively. An external thread is formed on the vibration measuring nail. The external thread on the vibration measuring nail is tightened with the screw hole on the pump body to install the vibration measuring nail on the upper end of the vibration measuring pump housing and the lower end of the pump body.

[0006] Furthermore, a first sealing gasket is installed between the speed measuring cover and the upper surface of the vibration measuring pump housing.

[0007] Furthermore, a second sealing gasket is installed between the top cover and the bottom of the recess.

[0008] Furthermore, an annular recess is formed on the surface of the lower cover facing the opening, and the diameter of the annular recess is larger than the diameter of the opening so that the annular recess is located outside the opening.

[0009] Furthermore, a sealing ring is installed in the annular recess.

[0010] Furthermore, the sealing ring is also tightly attached to the outer wall of the vibration measuring pump housing.

[0011] Furthermore, a first mounting hole is formed on the upper surface of the turbine, and the first mounting hole can be seen after the upper cover is opened.

[0012] Furthermore, a second mounting hole is formed on the outer wall of the pump body, and the second mounting hole can be seen through the opening after the lower cover is opened.

[0013] This invention offers the following advantages: The molecular pump of this invention features a convenient balancing fixture, eliminating the need to move the speed measuring device, vibration measuring device, and vibration pump housing during use, thus greatly improving balancing efficiency. Furthermore, since it eliminates the need to move the speed measuring device, measuring device, and vibration pump housing, the stability of the measurement data can be guaranteed to the greatest extent possible. Attached Figure Description

[0014] Figure 1 This is a partial schematic diagram of the molecular pump of this utility model when using the convenient adjustment and balancing tooling.

[0015] Figure 2 This is a schematic diagram of the overall setup for convenient adjustment and balancing of the molecular pump according to this utility model.

[0016] Figure 3 This is a schematic diagram of the installation of the lower cover and the vibration pump housing.

[0017] Figure 4 for Figure 1 A diagram from another perspective.

[0018] Figure 5 This is another partial schematic diagram of the molecular pump of this utility model when it is used with a convenient adjustment and balancing tool. Detailed Implementation

[0019] To further understand the contents of this utility model, a more detailed description is provided below with reference to the accompanying drawings. It should be understood that the embodiments are merely illustrative of this utility model and are not intended to limit it.

[0020] This utility model relates to a convenient adjustment and balancing fixture for a molecular pump, comprising a vibration measuring pump housing 10, a velocity measuring cover 2, an upper cover 4, a vibration measuring nail 7, and a lower cover 9. The velocity measuring cover 2 is installed at the upper end of the vibration measuring pump housing 10, and a first sealing gasket 3 is installed between the velocity measuring cover 2 and the upper surface of the vibration measuring pump housing 10. The upper surface of the velocity measuring cover 2 is recessed downward to form a recessed portion 20, and a through hole 200 is formed at the bottom of the recessed portion 20. The lower end of the upper cover 4 is installed in the through hole 200, and a second sealing gasket 5 is installed between the upper cover 4 and the bottom of the recessed portion 20.

[0021] An opening 100 is provided on the side wall of the lower end of the vibration pump housing 10. An annular recess 90 is formed on the surface of the lower cover 9 facing the opening 100. The diameter of the annular recess 90 is larger than the diameter of the opening 100, thus placing the annular recess 90 outside the opening 100. A sealing ring 8 is installed in the annular recess 90, and the sealing ring 8 is tightly attached to the outer side wall of the vibration pump housing 10. The lower cover 9 is installed onto the vibration pump housing 10 by screws installed at its four corners.

[0022] The molecular pump 6 includes a pump body 60 and a turbine 61 mounted together with the pump body 60. The turbine 61 is mounted at the axial center of the pump body 60. The bottom of the vibration measuring pump housing 10 is threadedly connected to the outer circumference of the pump body 60 and covers the turbine 61. A threaded hole (not shown) is formed at the upper end of the vibration measuring pump housing 10 and the lower end of the pump body 60, respectively. The vibration measuring pin 7 has an external thread. The external thread on the vibration measuring pin 7 is tightened into the threaded hole on the pump body 60 to install the vibration measuring pin 7 on the upper end of the vibration measuring pump housing 10 and the lower end of the pump body 60.

[0023] This utility model's convenient adjustment and balancing fixture for molecular pumps features a speed measuring device mounted on top to measure turbine speed, and a measuring device mounted on the side to measure turbine vibration. The top cover 4 is made of transparent acrylic, allowing efficient transmission of the laser emitted by the speed measuring device, thus accurately measuring the turbine 61's speed. The top cover 4 can be opened to reveal the first mounting hole 610 on the upper surface of the turbine 61, enabling the addition or removal of counterweight screws without moving the speed measuring device. A second mounting hole 101 is formed on the outer wall of the pump body 60, opposite to the opening 100 on the vibration measuring pump housing 10. The second mounting hole 101 on the outer wall of the pump body 60 is visible after the bottom cover 9 is opened, allowing the addition or removal of counterweight screws without moving the measuring device.

[0024] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements can be made without departing from the principle of the present utility model, and these improvements should also be considered within the protection scope of the present utility model.

Claims

1. A convenient adjustment and balancing fixture for a molecular pump, characterized in that: The device includes a vibration pump housing (10), a speed measuring cover (2), an upper cover (4), a vibration measuring nail (7), and a lower cover (9). The speed measuring cover (2) is installed at the upper end of the vibration pump housing (10). The upper surface of the speed measuring cover (2) is recessed downward to form a recess (20). A through hole (200) is formed at the bottom of the recess (20). The lower end of the upper cover (4) is installed in the through hole (200). An opening (100) is provided on the side wall of the lower end of the vibration pump housing (10). The lower cover (9) is installed on the vibration pump housing (10) by screws installed at its four corners. The pump (6) includes a pump body (60) and a turbine (61) installed together with the pump body (60). The turbine (61) is installed at the axial center of the pump body (60). The bottom of the vibration measuring pump housing (10) is connected to the outer circle of the pump body (60) by a thread and covers the turbine (61). The upper end of the vibration measuring pump housing (10) and the lower end of the pump body (60) are respectively formed with a threaded hole. The vibration measuring nail (7) is formed with an external thread. The external thread on the vibration measuring nail (7) is tightened with the threaded hole on the pump body (60) to install the vibration measuring nail (7) on the upper end of the vibration measuring pump housing (10) and the lower end of the pump body (60).

2. The molecular pump convenient adjustment balancing fixture as described in claim 1, characterized in that: A first sealing gasket (3) is installed between the speed measuring cover (2) and the upper surface of the vibration measuring pump housing (10).

3. The molecular pump convenient adjustment balancing fixture as described in claim 2, characterized in that: A second sealing gasket (5) is installed between the top cover (4) and the bottom of the recess (20).

4. The molecular pump convenient adjustment balancing fixture as described in claim 3, characterized in that: An annular recess (90) is formed on the surface of the lower cover (9) facing the opening (100), the diameter of the annular recess (90) being larger than the diameter of the opening (100) so that the annular recess (90) is located outside the opening (100).

5. The molecular pump convenient adjustment balancing fixture as described in claim 4, characterized in that: A sealing ring (8) is installed in the annular recess (90).

6. The molecular pump convenient adjustment balancing fixture as described in claim 5, characterized in that: The sealing ring (8) is also in close contact with the outer wall of the vibration pump housing (10).

7. The molecular pump convenient adjustment balancing fixture as described in claim 6, characterized in that: A first mounting hole (610) is formed on the upper surface of the turbine (61), and the first mounting hole (610) can be seen after the upper cover (4) is opened.

8. The molecular pump convenient adjustment balancing fixture as described in claim 7, characterized in that: A second mounting hole (101) is formed on the outer side wall of the pump body (60). The second mounting hole (101) can be seen through the opening (100) after the lower cover (9) is opened.

Images