A lubricating oil system throttling device and use method thereof

Abstract

The present invention relates to a lubricating oil system throttling device and a method of using the same, and belongs to the field of steam turbine lubricating oil systems. The present invention comprises a cap, a valve core, a nut and a valve seat, wherein the cap is arranged on the upper part of the nut, the nut is arranged on the upper part of the valve seat, the valve core is arranged in the middle of the valve seat, the nut is arranged outside the valve core, and the cap is arranged outside the valve core. The present invention has a reasonable structural design and is simple to operate. The steam turbine lubricating oil filter device is convenient and quick to put into or out of operation, is energy-saving, environmentally friendly, safe, time-saving and labor-saving, and meets the use requirements.

Description

Technical Field

[0001] The invention relates to a device and a method, in particular to a throttling device for a lubricating oil system and a using method thereof, and belongs to the field of steam turbine lubricating oil systems. Background Art

[0002] The steam turbine lubricating oil system filter device filters the lubricating oil introduced into the steam turbine regulating and safety system and each bearing through the filter element, ensuring the particle size and quality of the lubricating oil while safeguarding the safe operation of the steam turbine.

[0003] The general steam turbine lubricating oil filter device adopts a one-in-operation and one-in-standby design. When the differential pressure before and after the lubricating oil filter device on the operating side is greater than 50kPa, in order to ensure that no major accidents such as burning of the turbine due to oil outage occur, the lubricating oil filter device needs to be switched. The usual method is to put the standby filter device into operation, and then shut down the filter device with the high differential pressure before and after the previous operation. The process of putting the lubricating oil filter device into operation is that professional technicians slowly inject the lubricating oil into the filter device through operations such as oil filling and air exhaust, thereby completing the operation of the standby filter device. However, during the operation process, due to improper operation methods and excessive speed, the differential pressure before and after the filter device is greater than 50kPa, resulting in the activation of the lubricating oil system protection, or even the tripping of the unit, which endangers the safe operation of the steam turbine and is not conducive to the service life of the equipment and energy conservation and environmental protection.

[0004] In the throttling device of the lubricating oil system, the main means currently used is the method of fixed throttling holes, and when the lubricating oil filter is put into use, the operator needs to manually control the opening speed of the oil inlet valve. If the speed is too fast, the differential pressure before and after the filter will increase, thereby causing the lubricating oil system protection action, thus affecting the safe operation of the lubricating oil system. Compared with the existing technology, after using this application, the operator can operate the lubricating oil filter inlet valve at will without speed conditions. As long as the metal properties of the lubricating oil inlet manual door are met, this device will not cause the differential pressure before and after the lubricating oil filter to increase due to the operator's human factors, thereby protecting the safe and stable operation of the unit.

[0005] Therefore, it is particularly necessary to provide a lubricating oil system throttling device which has a reasonable structural design, simple operation, energy saving and environmental protection, safety and reliability, and time and labor saving. Summary of the invention

[0006] The purpose of the present invention is to overcome the above-mentioned deficiencies in the prior art and to provide a lubricating oil system throttling device and its use method which has a reasonable structural design, is simple to operate, is convenient and quick to put into or out of a turbine lubricating oil filter device, is energy-saving and environmentally friendly, safe and reliable, and saves time and effort.

[0007] The technical solution adopted by the present invention to solve the above-mentioned problem is: the throttling device of the lubricating oil system includes a cap, a nut and a valve seat, the cap is arranged on the upper part of the nut, the nut is arranged on the upper part of the valve seat, and is characterized in that: it also includes a valve core, the valve core is arranged in the middle of the valve seat, the nut is located outside the valve core, and the cap is located outside the valve core.

[0008] Preferably, the adjustable valve core of the present invention includes a manual adjustment area, a threaded area, a linear flow adjustment area and a large flow flushing area, the manual adjustment area is arranged at the uppermost part of the valve core, the threaded area is arranged at the lower part of the manual adjustment area, the linear flow adjustment area is arranged at the lower part of the threaded area, and the large flow flushing area is arranged at the lower part of the linear flow adjustment area and at the bottom of the valve core.

[0009] Preferably, the valve core of the present invention is an adjustable valve core.

[0010] The present invention also provides a method for using the throttling device of the lubricating oil system, which adopts the throttling device of the lubricating oil system, and is characterized by the following steps:

[0011] (1) Install the lubricating oil system throttling device on the pipeline between the oil filling valve of the filter device and the filter device;

[0012] (2) Debug the throttling device of the lubricating oil system. The specific process is as follows:

[0013] Step 1: Twist open the cap and loosen the nut.

[0014] Step 2: Record the differential pressure before and after the lubricating oil filter Δ P0( Δ P0=P1-P2).

[0015] Step 3: Open the oil filling valve of the lubricating oil filter device.

[0016] Step 4: Adjust the manual adjustment area of ​​the valve core to control the oil inlet of the lubricating oil filter through the linear flow adjustment area of ​​the valve core; while adjusting the valve core, record the change of the differential pressure value before and after the filter. Δ P1( Δ P1=P1-P2).

[0017] Step 5: When Δ P1- Δ When P0>5kPa, repeat step 4; Δ P1- Δ When P0≤5kPa, execute step 6;

[0018] Step 6: Tighten the nut and put on the cap;

[0019] (3) When flushing and repairing the lubricating oil filter device, the specific process is as follows:

[0020] Step 1: Rotate to open the cap and loosen the nut;

[0021] Step 2: Open the oil filling valve of the lubricating oil filter device;

[0022] Step 3: Adjust the manual adjustment area of ​​the valve core, and open the large-flow flushing area of ​​the valve core to perform large-flow flushing on the lubricating oil filter device, the lubricating oil filter device oil filling valve and its pipeline.

[0023] Compared with the prior art, the present invention has the following advantages and effects: (1) The overall structural design is reasonable and the operation is simple. The turbine lubricating oil filter device can be put into or out of the device conveniently and quickly, which is energy-saving, environmentally friendly, safe, and time-saving and labor-saving. (2) The oil inlet of the lubricating oil switching device can be effectively controlled, which can not only ensure the safety of the system during low-flow oil injection, but also meet the oil demand during high-flow flushing. (3) The switching steps of the lubricating oil filter device are simplified, which avoids or reduces the increase in the differential pressure before and after the lubricating oil filter device due to improper human operation, thereby causing protection action or even unit tripping, making the switching process of the lubricating oil filter device convenient, fast, time-saving and labor-saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention.

[0025] Figure 2 Schematic diagram of the structure of the valve core in the embodiment of the present invention.

[0026] Figure 3 Schematic diagram of the installation of the embodiment of the present invention.

[0027] In the figure: cap 1, valve core 2, nut 3, valve seat 4; lubricating oil inlet 5, lubricating oil outlet 6, manual adjustment area 21, threaded area 22, linear flow adjustment area 23, large flow flushing area 24; inlet pressure measuring point 101, A lubricating oil filter inlet door 102, A lubricating oil filter 103, A lubricating oil filter drain door 104, A lubricating oil filter outlet door 105, inlet pressure measuring point 106, B lubricating oil filter outlet door 107, B lubricating oil filter 108, B lubricating oil filter drain door 109, B lubricating oil filter inlet door 110, B throttling device 111, B lubricating oil filter oil filling door 112, A lubricating oil filter oil filling door 113, B throttling device 114. DETAILED DESCRIPTION

[0028] The present invention will be further described in detail below with reference to the accompanying drawings and by way of examples. The following examples are intended to explain the present invention but the present invention is not limited to the following examples.

[0029] Example

[0030] See also Figures 1 to 3 The throttling device of the lubricating oil system in this embodiment includes a cap 1, a valve core 2, a nut 3 and a valve seat 4; Figure 1 The lubricating oil inlet 5 and the lubricating oil outlet 6 are also marked inside, and the throttling device of the lubricating oil system is installed between the filling valve of the lubricating oil filter device and the lubricating oil filter device; the filter element is in the middle of the valve seat 4, the nut 3 is on the upper part of the valve seat 4 and outside the valve core 2, and the cap 1 is on the upper part of the nut 3 and outside the adjustable valve core 2;

[0031] The valve core 2 of this embodiment includes a manual adjustment area 21, a threaded area 22, a linear flow adjustment area 23 and a large flow flushing area 24. The manual adjustment area 21 of the valve core 2 is at the uppermost part of the valve core 2, the threaded area 22 is at the lower part of the manual adjustment area 21, the upper part of the linear flow adjustment area 23, the linear adjustment area is at the lower part of the threaded area 22, and at the upper part of the large flow flushing area 24. The large flow flushing area 24 is at the lower part of the linear flow adjustment area 23, and at the bottom of the valve core 2.

[0032] See also Figure 3 , is the installation diagram of this embodiment: the inlet pressure measuring point 101 passes through branch one or branch two, and then to the outlet pressure measuring point 106, and branch one and branch two are connected in parallel. Branch one includes the set A lubricating oil filter device inlet door 102, A lubricating oil filter device 103, A lubricating oil filter device emptying door 104 and A lubricating oil filter device outlet door 105; branch two includes the set B lubricating oil filter device outlet door 107, B lubricating oil filter device 108, B lubricating oil filter device emptying door 109 and B lubricating oil filter device inlet door 110.

[0033] The A lubricating oil filter device 103 is connected to the inlet pressure measuring point 101 through the B throttling device 114 and the A lubricating oil filter device filling valve 113; the B lubricating oil filter device 108 is connected to the inlet pressure measuring point 101 through the B throttling device 111 and the B lubricating oil filter device filling valve 112.

[0034] The throttling device is installed, and the specific process is as follows: the throttling device is installed on the pipeline between the oil filling valve of the filtering device and the filtering device.

[0035] Debug the throttling device. The specific process is as follows:

[0036] Step 1: Rotate and open the cap 1 and loosen the nut 3.

[0037] Step 2: Record the differential pressure before and after the lubricating oil filter Δ P0( Δ P0=P1-P2).

[0038] Step 3: Open the oil filling valve of the lubricating oil filter device.

[0039] Step 4: Adjust the manual adjustment area 21 of the valve core 2, and control the oil inlet of the lubricating oil filter device through the linear flow adjustment area 23 of the valve core 2; while adjusting the valve core 2, simultaneously record the change of the differential pressure value before and after the filter device Δ P1( Δ P1=P1-P2).

[0040] Step 5: When Δ P1- Δ When P0>5kPa, repeat step 4; Δ P1- Δ When P0≤5kPa, go to step 6.

[0041] Step 6: Tighten the nut 3 and cover the cap 1.

[0042] After the throttling device of the lubricating oil system is debugged, when the lubricating oil filter device is filled with oil again by opening the oil filling valve of the lubricating oil filter device, the differential pressure before and after the filter device will not increase due to the oil filling valve opening and closing too quickly, and the differential pressure increase before and after the filter device will always be kept within 5kPa, thereby ensuring the safe operation of the system.

[0043] When flushing and repairing the lubricating oil filter device, the specific process is as follows:

[0044] Step 1: Rotate and open the cap 1 and loosen the nut 3.

[0045] Step 2: Open the oil filling valve of the lubricating oil filter device.

[0046] Step 3: Adjust the manual adjustment area 21 of the valve core 2. By opening the large flow flushing area 24 of the valve core 2, the lubricating oil filter device, the lubricating oil filter device oil filling valve and its pipeline can be flushed with a large flow rate.

[0047] Through the above description, those skilled in the art can already implement it. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0048] In addition, it should be noted that the shapes and names of the parts and components of the specific embodiments described in this specification may be different, and the above content described in this specification is only an example of the structure of the present invention. All equivalent changes or simple changes made based on the structure, features and principles described in the patent concept of the present invention are included in the protection scope of the patent of the present invention. Technicians in the technical field of the present invention can make various modifications or supplements to the specific embodiments described or replace them in a similar manner, as long as they do not deviate from the structure of the present invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

Claims

1. A method for using a throttling device for a lubricating oil system, the throttling device for a lubricating oil system comprising a cap (1), a valve core (2), a nut (3) and a valve seat (4), the cap (1) being arranged on the upper part of the nut (3), the nut (3) being arranged on the upper part of the valve seat (4), the valve core (2) being arranged in the middle of the valve seat (4), the nut (3) being arranged outside the valve core (2), and the cap (1) being arranged outside the valve core (2); the valve core (2) comprising a manual adjustment area (21), a threaded area (22) and a threaded area (23). 2), a linear flow adjustment area (23) and a large flow flushing area (24), the manual adjustment area (21) is arranged at the uppermost part of the valve core (2), the threaded area (22) is arranged at the lower part of the manual adjustment area (21), the linear flow adjustment area (23) is arranged at the lower part of the threaded area (22), and the large flow flushing area (24) is located at the lower part of the linear flow adjustment area (23) and at the bottom of the valve core (2); the valve core (2) adopts an adjustable valve core (2), characterized in that: Here are the steps: 1) Install the throttling device of the lubricating oil system on the pipeline between the oil filling valve of the filter device and the filter device; 2) Debug the throttling device of the lubricating oil system. The specific process is as follows: Step 1: Open the cap (1) by twisting it and loosen the nut (3); Step 2: Record the differential pressure before and after the lubricating oil filter Δ P0; Step 3: Open the oil filling valve of the lubricating oil filter device; Step 4: Adjust the manual adjustment area (21) of the valve core (2) to control the oil inlet of the lubricating oil filter device through the linear flow adjustment area (23) of the valve core (2); while adjusting the valve core (2), simultaneously record the change in the differential pressure value before and after the filter device. Δ P1; Step 5: When Δ P1- Δ When P0>5kPa, repeat step 4; Δ P1- Δ When P0≤5kPa, execute step 6; Step 6: Tighten the nut (3) and replace the cap (1); 3) When flushing and repairing the lubricating oil filter device, the specific process is as follows: Step 1: Open the cap (1) by twisting it and loosen the nut (3); Step 2: Open the oil filling valve of the lubricating oil filter device; Step 3: Adjust the manual adjustment area (21) of the valve core (2) to open the large flow flushing area (24) of the valve core (2) to perform large flow flushing on the lubricating oil filter device, the lubricating oil filter device oil filling valve and its pipeline.

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