A low temperature oil seal testing machine

Abstract

The present invention provides a low-temperature oil seal test machine, including a low-temperature box and a frame, the low-temperature box includes a refrigeration chamber and a low-temperature chamber, the refrigeration chamber is provided with an evaporator, a condenser and a compressor, the outside of the refrigeration chamber is provided with a low-temperature control instrument, a rotating base is fixedly connected to the center of the bottom of the refrigeration chamber, the rotating base is connected to the rotating motor inside the frame through a connecting rod, a front box door is provided at the front end of the low-temperature chamber, a window is provided at the rear end, a test seat that seals with the window is provided on the top of the frame, a main shaft is vertically provided on the test seat, one end of the main shaft is connected to the output shaft of the test motor through a belt drive, and the other end is connected to the test shaft, a low-temperature oil drum fixedly connected to the test seat is provided on the periphery of the test shaft, the low-temperature oil drum is provided with a front cover, and a test control instrument is provided on the frame below the low-temperature chamber. The present invention does not require an external liquid nitrogen tank, reduces the loss of production materials and manual operation processes, and reduces production costs.

Description

Technical Field

[0001] The invention relates to the field of testing instruments, in particular to a low-temperature oil seal testing machine. Background Art

[0002] The existing low-temperature oil seal rotation tester uses liquid nitrogen refrigeration to obtain the low-temperature conditions required for the test, which requires an external liquid nitrogen tank, making the equipment cumbersome and complicated. Liquid nitrogen tanks not only have shelf life requirements and require regular annual inspections, but also have safety hazards. The low-temperature oil seal rotation test takes a long time, with a test cycle of dozens of hours or even dozens of days, consuming a large amount of liquid nitrogen, and has a high economic cost. At the same time, test personnel are required to be on duty at the test site and continuously replenish liquid nitrogen manually, which consumes a lot of time for the experimenters. Summary of the invention

[0003] The purpose of the present invention is to provide a low temperature oil seal testing machine to solve the above problems in view of the shortcomings of the prior art.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A low-temperature oil seal testing machine comprises a low-temperature box and a frame, wherein the low-temperature box comprises a refrigeration chamber and a low-temperature room, wherein an evaporator, a condenser and a compressor are arranged in the refrigeration chamber, a low-temperature control instrument is arranged outside the refrigeration chamber, a rotating base is fixedly connected to the center of the bottom of the refrigeration chamber, the rotating base is connected to the rotating motor inside the frame through a connecting rod, a front box door is provided at the front end of the low-temperature room, a window is provided at the rear end, a test seat which cooperates with the window seal is provided on the top of the frame, a main shaft is vertically provided on the test seat, one end of the main shaft is connected to the output shaft of the test motor through a belt drive, and the other end is connected to the test shaft, a low-temperature oil drum fixedly connected to the test seat is arranged on the outer periphery of the test shaft, the low-temperature oil drum is provided with a front cover, and a test control instrument is arranged on the frame below the low-temperature room. The low-temperature chamber is directly cooled by the refrigeration equipment in the refrigeration room, which can keep the refrigeration for a long time without the need for an external liquid nitrogen tank or manual replenishment of liquid nitrogen consumption, reducing production and labor costs. At the same time, the safety factor of the refrigeration equipment during the test is higher than that of the liquid nitrogen tank, ensuring the safety of the test. The rotating base under the refrigeration room can easily rotate the entire low-temperature box 90°, exposing the low-temperature oil drum to the outside world, making it convenient for staff to disassemble and repair the low-temperature oil drum.

[0006] Preferably, two sets of proximity switches and anti-collision devices are arranged on the top of the rack, one set is arranged on the rear side of the low-temperature box, and the other set is arranged on the left side of the test seat. When the low-temperature box rotates, the two sets of proximity switches and anti-collision devices can effectively limit the rotation trajectory of the low-temperature box.

[0007] Preferably, the front door is provided with an observation window, through which the test status inside the low-temperature chamber can be observed more clearly.

[0008] Preferably, the test seat and the window are sealed and fixed by a butterfly nut, and a sealing gasket is arranged on the periphery of the test seat. The use of the sealing gasket further improves the sealing performance between the test seat and the low-temperature box.

[0009] Preferably, the low-temperature oil drum is provided with an oil inlet at the top and a vernier exhaust valve and an oil outlet at the bottom.

[0010] Preferably, a heating and defrosting device is provided in the low temperature chamber. The heating and defrosting device is installed in the low temperature chamber to ensure that the observation window and the outside of the low temperature oil drum will not frost, thereby ensuring the observation effect of the test.

[0011] Preferably, the low temperature oil drum is provided with an eccentric adjustment screw. The eccentric adjustment screw is installed on the low temperature oil drum to perform an eccentricity test on the test shaft and the oil seal.

[0012] Preferably, the low temperature box, the front box door and the test seat are all wrapped with an interlayer of thermal insulation asbestos. The wrapping of thermal insulation asbestos ensures the heat insulation effect between the inside of the low temperature box and the outside.

[0013] Preferably, a protective cover is provided outside the main shaft and the test motor to prevent damage to the main shaft and the test motor caused by external objects.

[0014] Preferably, a temperature sensor is provided in the low-temperature oil drum, which can accurately measure the real-time temperature of the oil seal in the low-temperature oil drum, thereby improving the accuracy and rigor of the test.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] 1. The use of built-in refrigeration equipment can meet long-term test requirements without the need for an external liquid nitrogen tank, reducing the cost of test materials and labor costs.

[0017] 2. The use of a rotatable low-temperature box facilitates the disassembly, assembly and maintenance of the low-temperature oil drum. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the external structure of the present invention;

[0019] Figure 2 It is a schematic diagram of the internal structure of the present invention;

[0020] Figure 3 It is a top view of the low-temperature box and the test seat of the present invention when they are sealed and fixed;

[0021] Figure 4 It is a top view of the low temperature box of the present invention when it is disconnected from the test seat;

[0022] Among them, 1-frame, 101-rotating base, 102-rotating motor, 103-test motor, 104-test control instrument, 105-proximity switch, 106-anti-collision device, 2-low temperature box, 201-refrigeration room, 2011-condenser, 2012-evaporator, 2013-compressor, 2014-low temperature control instrument, 202-low temperature room, 2021-front box door, 2022-observation window, 3-low temperature oil drum, 301-oil inlet, 302-curniture exhaust valve, 303-test shaft, 304-temperature sensor, 305-eccentric adjustment screw, 306-oil outlet, 307-front cover, 4-test seat, 5-oil seal, 6-spindle, 7-protective cover, 8-insulation asbestos, DETAILED DESCRIPTION

[0023] The present invention is further explained below in conjunction with the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. After reading the present invention, various equivalent forms of modifications to the present invention by those skilled in the art all fall within the scope defined by the claims attached to this application.

[0024] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0025] like Figures 1 to 4As shown, a low-temperature oil seal tester includes a low-temperature box 2 and a frame 1. The low-temperature box 2 includes a refrigeration chamber 201 and a low-temperature chamber 202. The refrigeration chamber 201 is equipped with refrigeration equipment such as an evaporator 2012, a condenser 2011 and a compressor 2013. A low-temperature control instrument 2014 is provided outside the refrigeration chamber 201. The low-temperature control instrument 2014 is responsible for controlling the refrigeration equipment and adjusting the refrigeration temperature. A rotating base 101 is fixedly connected to the center of the bottom of the refrigeration chamber 201. The rotating base 101 is connected to a rotating motor 102 inside the frame through a connecting rod. The rotation of the low-temperature box 2 on the frame 1 is controlled by running the rotating motor 102. Two sets of proximity switches are provided on the top of the frame 1. 105 and anti-collision device 106, one set is arranged at the rear side of the low-temperature box 2, and the other set is arranged at the left side of the test seat 4. When the low-temperature box 2 is disengaged from the test seat 4 and rotated to the left side of the test seat 4, the low-temperature box 2 is limited by the anti-collision device 106 on the left side of the test seat 4. When the low-temperature box 2 rotates and is sealed and fixed with the test seat 4, the low-temperature box 2 contacts the anti-collision device 106 on the rear side of the low-temperature box 2 and stops moving. The two anti-collision devices 106 are used to ensure that the low-temperature box 2 itself and the test seat 4 will not be impacted and damaged when the low-temperature box rotates; a front box door 221 is provided at the front end of the low-temperature chamber 202, and an observation window 222 is provided on the front box door 221. A window is provided at the rear end of the frame 1, and a test seat 4 that can be sealed with the window is installed on the top of the frame 1. The test seat 4 and the window are sealed and fixed by a butterfly nut. A sealing gasket is fixed on the periphery of the test seat 4, which further improves the sealing between the test seat 4 and the low-temperature box 2. A main shaft 6 is vertically provided on the test seat 4. One end of the main shaft 6 is connected to the output shaft of the test motor 103 through a belt drive. A protective cover 7 is provided on the outside of the main shaft 6 and the test motor 103 to prevent foreign matter from damaging the main shaft 6 and the test motor 103. The other end of the main shaft 6 is connected to the test shaft 303. A low-temperature oil drum 3 fixedly connected to the test seat 4 is provided on the periphery of the test shaft 303. The low-temperature oil drum 3 is provided with a front cover 3 07. An oil inlet 301 is provided at the top of the low-temperature oil drum 3, and a vernier exhaust valve 302 and an oil outlet 306 are provided at the lower end. An eccentric adjustment screw 305 is installed on the low-temperature oil drum 3, and an eccentricity test can be performed on the test shaft 303 and the oil seal 5. A temperature sensor 304 is provided in the low-temperature oil drum 3, which can accurately measure the real-time temperature of the oil seal 5 in the low-temperature oil drum 3 to improve the accuracy and rigor of the test. A heating and defrosting device is installed in the low-temperature chamber 202 to ensure that the observation window 2022 and the outer side of the low-temperature oil drum 3 will not frost and will not affect the observation of the test status. A test control instrument 104 is provided on the frame 1 below the low-temperature chamber 202 to control the speed of the test motor 103.

[0026] The working process and principle of a low-temperature oil seal tester: When performing a low-temperature rotation test on the oil seal 5, first start the rotating motor 103, rotate the low-temperature box 2 until it contacts the anti-collision device 106 on the left side of the test seat 4, install the oil seal 5 on the test shaft 303, seal and fix the front cover 307 with the low-temperature oil drum 3, add oil to the low-temperature oil drum 3 through the oil inlet 301, start the rotating motor 103 again, rotate the low-temperature box 3 until it contacts the anti-collision device 106 on the rear side of the low-temperature box 3, and use the butterfly nut to fix the window on the rear side of the low-temperature chamber 202. It is sealed and fixedly connected with the test seat 4, and the refrigeration equipment is started by operating the low-temperature control instrument 2014 to determine the temperature of the low-temperature chamber 202. The test control instrument 104 is operated to start the test motor 103, and the rotation speed of the test motor 103 is controlled to start the low-temperature rotation test of the oil seal 5. When frost appears in the low-temperature chamber 202, the heating and defrosting device in the low-temperature chamber 202 is started for defrosting. The status of the oil seal 5 in the test can be observed at any time through the observation window 2022. After the test, the oil seal 5 is taken out in the reverse order of the previous operating steps.

[0027] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A low temperature oil seal testing machine, characterized in that: It includes a low-temperature box and a frame, the low-temperature box includes a refrigeration chamber and a low-temperature room, the refrigeration chamber is provided with an evaporator, a condenser and a compressor, the outside of the refrigeration chamber is provided with a low-temperature control instrument, a rotating base is fixedly connected to the bottom center of the refrigeration chamber, the rotating base is connected to the rotating motor inside the frame through a connecting rod, a front box door is opened at the front end of the low-temperature room, a window is opened at the rear end, a test seat sealed with the window is provided on the top of the frame, a main shaft is vertically provided on the test seat, one end of the main shaft is connected to the output shaft of the test motor through a belt drive, and the other end is connected to the test shaft, a low-temperature oil drum fixedly connected to the test seat is provided on the outer periphery of the test shaft, the low-temperature oil drum is provided with a front cover, a test control instrument is provided on the frame below the low-temperature room, the low-temperature box, the front box door and the test seat are all wrapped with an interlayer of thermal insulation asbestos.

2. A low temperature oil seal testing machine according to claim 1, characterized in that: Two sets of proximity switches and anti-collision devices are arranged on the top of the rack, one set is arranged on the rear side of the low-temperature box, and the other set is arranged on the left side of the test seat.

3. A low temperature oil seal testing machine according to claim 1, characterized in that: The front box door is provided with an observation window.

4. A low temperature oil seal testing machine according to claim 1, characterized in that: The test seat and the window are sealed and fixed by a butterfly nut, and a sealing gasket is arranged on the periphery of the test seat.

5. A low temperature oil seal testing machine according to claim 1, characterized in that: The top of the low-temperature oil drum is provided with an oil inlet, and the lower end is provided with a vernier exhaust valve and an oil outlet.

6. A low temperature oil seal testing machine according to claim 1, characterized in that: The low temperature chamber is provided with a heating and defrosting device.

7. A low temperature oil seal testing machine according to claim 1, characterized in that: The low-temperature oil drum is provided with an eccentric adjusting screw.

8. The low temperature oil seal testing machine according to claim 1, characterized in that: Protective covers are arranged on the outside of the main shaft and the test motor.

9. A low temperature oil seal testing machine according to claim 1, characterized in that: A temperature sensor is arranged in the low-temperature oil drum.

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