Temperature sensing device for bearing bush of centrifugal compressor unit

Abstract

The utility model relates to a temperature sensing device for a bearing bush of a centrifugal compressor unit, which comprises a bearing bush on the compressor unit, a temperature sensor is fixed on the bearing bush, and the temperature sensor is connected with a flexible cable; a cable inlet is formed in the compressor unit shell, the flexible cable penetrates through the cable inlet to be wound on the compressor unit shell, and the flexible cable is fixed to the compressor unit through a bearing seat. The bearing seat is provided with a pressing plate used for tightly pressing the flexible cable. The flexible cable in the compressor unit shell is sleeved with a heat shrink tube and a PU tube, and lubricating oil is prevented from making direct contact with the flexible cable. According to the utility model, the flexible cable in the casing can be prevented from contacting oil, the wear resistance is improved, the skin of the flexible cable is prevented from being damaged, and the service life of the device is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of compressor equipment, in particular to a temperature sensing device for a bearing bush of a centrifugal compressor unit. Background Art

[0002] The PTA oxidation unit uses a five-stage centrifugal compressor to compress air for the reactor. Due to the medium characteristics of air compression and the large scale of the unit, the overall casing and the compressor interstage pipeline vibrate greatly, and the bearing temperature is easily worn out by the flexible cable installation. The flexible cable of the temperature sensor is in contact with lubricating oil for a long time, and the surface rubber cable layer is prone to aging and falling off. In addition, the compressor has a high interlocking degree, and the bearing temperature failure triggers the unit interlocking and causes unplanned shutdown. Whether the temperature sensor can operate stably for a long time is extremely important.

[0003] The utility model patent with publication number CN212898880U discloses a temperature detection device for the bearings of the reducers and reducers of a reciprocating compressor; the above technical solution can monitor the temperature of the bearings of the reducers and reducers of the reciprocating compressor in real time, but there are still technical problems that the flexible cable is not firmly connected to the casing and the surface of the flexible cable in the casing is easily worn. Utility Model Content

[0004] In order to solve the technical problems that the connection between the flexible cable and the casing is not firm and the surface of the flexible cable in the casing is easily worn, the utility model provides a temperature sensing device for the bearing of a centrifugal compressor unit.

[0005] The technical solution of the utility model is as follows: it includes a bearing on the compressor unit, on which a temperature sensor is fixed, and the temperature sensor is connected to a flexible cable; a cable inlet is provided on the compressor unit casing, and the flexible cable passes through the cable inlet and surrounds the compressor unit casing, and the flexible cable is fixed to the compressor unit through a bearing seat; a pressing plate for tightly pressing the flexible cable is provided on the bearing seat; the flexible cable sleeve inside the compressor unit casing is provided with a heat shrink tube and a PU tube to prevent lubricating oil from directly contacting the flexible cable.

[0006] Furthermore, a PU tube is provided on the flexible cable at the cable inlet of the compressor unit casing.

[0007] Furthermore, a U-shaped plate is fixed on the compressor unit casing, and redundant flexible cables are placed on the U-shaped plate.

[0008] Furthermore, the redundant flexible cables are bundled with copper wires.

[0009] Furthermore, two pressing plates are provided.

[0010] Furthermore, the pressing plate is made of stainless steel.

[0011] Furthermore, the flexible cable sheath inside the compressor unit casing is provided with three layers of heat shrink tubes and one layer of PU tube.

[0012] The utility model has the following beneficial effects:

[0013] The bearing seat and pressure plate provided in this device are used to tightly fix the flexible cable and the compressor unit, thereby improving the firmness of the device; the flexible cable in the casing is sheathed with a heat shrink tube and a PU tube to prevent the lubricating oil from directly contacting the flexible cable and to enhance the service life of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is an overall schematic diagram of an embodiment of the utility model.

[0015] The reference numerals in the figure are as follows:

[0016] 1. Casing; 2. Bearing; 3. PU tube; 4. Heat shrink tube; 5. Pressure plate; 6. Flexible cable; 7. Cable entry. DETAILED DESCRIPTION

[0017] The utility model is described in detail below with reference to the accompanying drawings and specific embodiments.

[0018] See also Figure 1 As shown, in an embodiment of the utility model, a temperature sensor is fixed on a bearing on the compressor unit, and the temperature sensor is connected to a flexible cable; a cable inlet is provided on the compressor unit casing, and the flexible cable passes through the cable inlet and surrounds the compressor unit casing, and the flexible cable is fixed to the compressor unit through a bearing seat; a pressing plate for tightly pressing the flexible cable is provided on the bearing seat; the flexible cable sleeve inside the compressor unit casing is provided with a heat shrink tube and a PU tube to prevent the lubricating oil from directly contacting the flexible cable.

[0019] The original technology for fixing the cable on the bearing side uses two bolts for clamping and fixing, which is easy to loosen due to vibration; now a stainless steel pressure plate is made to press the cable from different directions and ensure the reserved curvature of the cable, thereby increasing the fit between the flexible cable and the bearing seat, and preventing the metal end of the temperature sensor from detaching from the bearing due to vibration. Cancel the direct fixed installation of part of the casing and the flexible cable, and use the overall PU tube protection of the cable and then tie it to the metal tube to prevent the fixed wire clip on the casing from falling off. Optimize and adjust the installation form of the flexible extension cable of the temperature sensor; the flexible cable (φ3) inside the casing uses three layers of heat shrink tubing (φ4, φ5, φ6) and then heat shrinks them separately, and then adds a layer of PU (inner diameter φ8) tube for vibration and oil protection, which increases the degree of wear and prevents lubricating oil from directly contacting the flexible cable, which is used to improve the wear resistance and anti-aging of the sensor.

[0020] See also Figure 1As shown, in another embodiment of the utility model, a PU tube is provided on the flexible cable at the cable inlet of the compressor unit casing. The flexible cable at the cable inlet of the casing is protected by the PU tube to avoid wear caused by line vibration and to avoid direct contact with lubricating oil.

[0021] See also Figure 1 As shown, in another embodiment of the utility model, a U-shaped plate is fixed on the compressor unit casing, and redundant flexible cables are placed on the U-shaped plate. Several U-shaped plates are fixed on the compressor unit casing, and redundant flexible cables are placed in the middle of the U-shaped plates to prevent the flexible cables from falling off the ground and directly contacting other debris, thereby playing a protective role.

[0022] See also Figure 1 As shown, in another embodiment of the utility model, the redundant flexible cables are bundled with copper wires. The redundant flexible cables are reinforced with copper wires to prevent the cable ties from aging and falling off, avoid contact with oil, and prevent the flexible cables from directly contacting the metal housing.

[0023] See also Figure 1 As shown, in another embodiment of the utility model, two pressing plates are provided. The pressing plates are made of stainless steel. Two stainless steel pressing plates are made on each bearing seat of the compressor unit to fix the flexible cable to prevent the flexible cable from loosening, and the heat shrink tube prevents direct oil contact, thereby improving the wear resistance of the flexible cable.

[0024] See also Figure 1 As shown, in another embodiment of the utility model, the flexible cable sheath inside the compressor unit casing is provided with three layers of heat shrink tubes and one layer of PU tube.

[0025] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A temperature sensing device for a centrifugal compressor bearing, characterized in that: A temperature sensor is fixed on the bearing on the compressor unit, and the temperature sensor is connected to a flexible cable; a cable inlet is provided on the compressor unit casing, and the flexible cable passes through the cable inlet and surrounds the compressor unit casing, and the flexible cable is fixed to the compressor unit through a bearing seat; a pressing plate for tightly pressing the flexible cable is provided on the bearing seat; the flexible cable sleeve inside the compressor unit casing is provided with a heat shrink tube and a PU tube to prevent the lubricating oil from directly contacting the flexible cable.

2. The temperature sensing device for the bearing bush of a centrifugal compressor unit according to claim 1, characterized in that: A PU tube is provided on the flexible cable at the cable inlet of the compressor unit casing.

3. The temperature sensing device for the bearing bush of a centrifugal compressor unit according to claim 1, characterized in that: A U-shaped plate is fixed on the compressor unit casing, and redundant flexible cables are placed on the U-shaped plate.

4. The temperature sensing device for the bearing bush of a centrifugal compressor unit according to claim 3, characterized in that: The redundant flexible cables are bundled with copper wires.

5. The temperature sensing device for the bearing bush of a centrifugal compressor unit according to claim 1, characterized in that: Two pressing plates are provided.

6. The temperature sensing device for the bearing bush of a centrifugal compressor unit according to claim 1, characterized in that: The pressing plate is made of stainless steel.

7. The temperature sensing device for the bearing bush of a centrifugal compressor unit according to claim 1, characterized in that: The flexible cable sheath inside the compressor unit casing is provided with three layers of heat shrink tubes and one layer of PU tube.

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