Compressor clearance control system and compressor

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By introducing a clearance control system into the compressor, automatic and precise adjustment of the clearance is achieved using mechanical drive and electrical control, solving the problems of low precision and low efficiency of traditional adjustment methods and improving the operating stability and efficiency of the compressor.

CN223424205UActive Publication Date: 2025-10-10PETROCHINA CO LTD

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Patent Information

Application Number: CN202422975575.7
Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner
Filing Date: 2024-12-04
Publication Date: 2025-10-10
Estimated Expiration: 2034-12-04

AI Technical Summary

Technical Problem

Traditional clearance adjustment methods rely on manual experience or simple mechanical adjustment, which cannot achieve precise control, and the adjustment process is cumbersome and inefficient.

Method used

The compressor clearance control system is adopted, including the clearance head, piston rod, drive assembly, encoding switch and controller. The clearance adjustment amount is calculated by receiving sensor data in real time, and automatic and precise clearance adjustment is achieved by mechanical drive and electrical control.

Benefits of technology

It realizes intelligent and automatic adjustment of the compressor clearance, improves the adjustment accuracy, ensures the stability and reliability of the compressor operation, reduces energy consumption, extends the life of the compressor, and simplifies the operation process.

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Abstract

The utility model relates to the field of compressors, in particular to a compressor clearance control system and a compressor, and aims at solving the technical problems that a traditional clearance adjusting mode is low in accuracy and low in efficiency. The compressor clearance control system comprises a clearance head, a piston rod, a driving assembly, a coding switch and a controller. The piston rod penetrates through the clearance head; the driving assembly is arranged on the clearance head and is in transmission connection with the piston rod so as to drive the piston rod to move in the axial direction of the piston rod. The coding switch is used for metering displacement of the piston rod; the controller is electrically connected with the coding switch and the driving assembly. The compressor includes a compressor clearance control system. According to the compressor clearance control system, intelligent and automatic adjustment of the compressor clearance is achieved through mechanical driving and electrical control, the adjustment precision is high, and the stability and reliability of operation of the compressor are guaranteed.

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Description

Technical Field

[0001] The utility model relates to the field of compressors, in particular to a compressor clearance control system and a compressor. Background Art

[0002] Reciprocating compressors are a key piece of equipment used in natural gas transportation, and their performance directly impacts natural gas extraction efficiency and economic benefits. Clearance adjustment is a crucial method for optimizing reciprocating compressor performance. Traditional clearance adjustment methods often rely on manual experience or simple mechanical adjustments, which lack precise control, are cumbersome, and inefficient. Utility Model Content

[0003] The purpose of the utility model is to provide a compressor clearance control system and a compressor, so as to solve the technical problems of low accuracy and low efficiency of traditional clearance adjustment methods.

[0004] In order to solve the above technical problems, the technical solution provided by the present invention is:

[0005] In a first aspect, the present invention provides a compressor clearance control system comprising: a clearance head, a piston rod, a drive assembly, a coding switch, and a controller;

[0006] The piston rod is inserted into the clearance head;

[0007] The driving assembly is arranged on the clearance head and is in transmission connection with the piston rod to drive the piston rod to move along its own axial direction;

[0008] The coding switch is used to measure the displacement of the piston rod;

[0009] The controller is electrically connected to the encoding switch and the driving assembly respectively.

[0010] Furthermore, the drive assembly includes a piston sleeve and a driver;

[0011] The piston sleeve is located outside the clearance head and is threadedly connected to the piston rod;

[0012] The output end of the driver is connected to the piston sleeve to drive the piston sleeve to rotate around its own axis.

[0013] Furthermore, the side surface of the piston rod is provided with an external thread;

[0014] The piston sleeve is sleeved on the piston rod and is provided with an internal thread matching the external thread.

[0015] Furthermore, the drive assembly further includes a bracket, and the piston sleeve is rotatably matched with the bracket so as to be rotatable around its own axis.

[0016] Furthermore, the bracket is connected to the clearance head bolt.

[0017] Furthermore, the driver is connected to the bracket by bolts.

[0018] Furthermore, the coding switch is fixed to the piston sleeve.

[0019] Furthermore, a sealing filler is embedded in the inner wall of the clearance head, and the sealing filler is sleeved on the piston rod and contacts the side wall of the piston rod.

[0020] In summary of the above technical solutions, the technical effects that can be achieved by the compressor clearance control system provided by the present invention are:

[0021] In this compressor clearance control system, the controller serves as the core of the entire system. When in use, it will receive data from the compressor's sensors in real time, such as the intake pressure sensor, to collect the intake pressure signal, and then calculate the required clearance adjustment amount to control the start-up of the drive component. Under operating conditions, the drive component will drive the piston rod along its own axial direction to adjust the clearance. The encoding switch measures the movement displacement of the piston rod in real time and feeds this information back to the controller, thus forming a closed-loop control.

[0022] In specific applications, if the intake pressure changes, the controller calculates the required clearance adjustment amount according to a preset algorithm. This calculation process takes into account multiple factors such as the current operating status of the compressor, the properties of the gas, the compression ratio, etc. to ensure the accuracy and effectiveness of the clearance adjustment; when the intake pressure is lower than the set value, the controller sends an instruction to the drive assembly to drive the piston rod outward, reducing the compression capacity of the compressor, thereby reducing the intake pressure; conversely, when the intake pressure is higher than the set value, the controller causes the drive assembly to drive the piston rod inward, increasing the compression capacity of the compressor and increasing the intake pressure; at the same time, during the control process, the controller cooperates with the coding switch to achieve precise adjustment of the piston rod displacement, so that the intake pressure gradually stabilizes near the set value.

[0023] It can be seen that compared with the existing technology, the compressor clearance control system realizes intelligent and automatic adjustment of the compressor clearance through mechanical drive + electrical control, and the adjustment accuracy is high, ensuring the stability and reliability of the compressor operation.

[0024] In a second aspect, the present invention provides a compressor comprising a clearance cylinder and the above-mentioned compressor clearance control system;

[0025] The clearance head is fixed to the clearance cylinder.

[0026] Furthermore, the clearance head is bolted to the clearance cylinder.

[0027] The beneficial effects of a compressor provided by the utility model are:

[0028] The compressor provided by the present invention includes a compressor clearance control system. Therefore, the technical advantages and effects achieved by the compressor also include the technical advantages and effects achieved by the above-mentioned compressor clearance control system, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0030] Figure 1 A cross-sectional view of a compressor clearance control system provided by an embodiment of the present utility model.

[0031] Icon: 1-clearance head; 2-piston rod;

[0032] 3-drive assembly; 31-piston sleeve; 32-driver; 33-bracket;

[0033] 4-coding switch; 5-controller; 6-sealing packing; 7-clearance cylinder. DETAILED DESCRIPTION

[0034] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0035] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0036] The following embodiments of the present invention are described in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments may be combined with each other.

[0037] The clearance adjustment is one of important means for optimizing the performance of the reciprocating compressor, and the traditional clearance adjustment mode often depends on the manual experience or simple mechanical adjustment, and cannot realize the accurate control, and the adjustment process is complicated and low in efficiency.

[0038] Therefore, the utility model provides a kind of compressor clearance control system, including clearance head 1, piston rod 2, drive assembly 3, encoding switch 4 and controller 5;Piston rod 2 is arranged in clearance head 1;Drive assembly 3 is arranged in clearance head 1, and is drivingly connected with piston rod 2, to drive piston rod 2 to move along its own axial direction;Encoding switch 4 is used to measure the displacement of piston rod 2;Controller 5 is electrically connected with encoding switch 4 and drive assembly 3 respectively.

[0039] In the compressor clearance control system, controller 5 is the core of the whole system, when applied, it will receive data from the sensor of the compressor in real time, such as intake pressure sensor, to collect intake pressure signal, and then calculate the required clearance adjustment amount, to control drive assembly 3 to start;Drive assembly 3 will drive piston rod 2 to move along its own axial direction under operating conditions, to realize the adjustment of clearance;Encoding switch 4 measures the movement displacement of piston rod 2 in real time, and feeds back the information to controller 5, to form closed-loop control.

[0040] In specific application, if intake pressure changes, controller 5 will calculate the required clearance adjustment amount according to the preset algorithm, and this calculation process will consider the current operating state of the compressor, the nature of gas, compression ratio and other factors, to ensure the accuracy and effectiveness of clearance adjustment;When intake pressure is lower than the set value, controller 5 sends instructions to drive assembly 3, to make drive assembly 3 drive piston rod 2 to move outward, to reduce the compression capacity of the compressor, and thus reduce intake pressure;On the contrary, when intake pressure is higher than the set value, controller 5 makes drive assembly 3 drive piston rod 2 to move inward, to improve the compression capacity of the compressor, and increase intake pressure;Meanwhile, in the control process, controller 5 cooperates with encoding switch 4 to realize the accurate adjustment of the displacement of piston rod 2, to make intake pressure gradually stabilize around the set value.

[0041] As can be seen, compared with the prior art, the compressor clearance control system realizes the intelligent and automatic adjustment of the clearance of the compressor through mechanical driving + electrical control, with high adjustment accuracy, to ensure the stability and reliability of the operation of the compressor.

[0042] It should also be noted that the controller 5 itself is based on existing technology, using a central processing unit (CPU) with edge computing capabilities and integrated DTU (Data Transfer Unit) functionality. Preferably, the controller 5 also incorporates an alarm function. If the compressor clearance control system experiences a fault or anomaly, the controller 5 immediately issues an alarm signal and notifies the operator through the monitoring backend. This allows the operator to promptly detect and address the fault, ensuring safe operation of the compressor.

[0043] The following combination Figure 1 The structure and shape of the compressor clearance control system provided in this embodiment are described in detail:

[0044] Regarding drive component 3, specifically:

[0045] refer to Figure 1 The driving assembly 3 includes a piston sleeve 31 and a driver 32; the piston sleeve 31 is outside the clearance head 1 and is threadedly connected to the piston rod 2; the output end of the driver 32 is connected to the piston sleeve 31 to drive the piston sleeve 31 to rotate around its own axis.

[0046] Specifically, the end of the clearance head 1 is fixed to the bracket 33 by bolts; the piston sleeve 31 is rotatably matched with the bracket 33, and the bracket 33 only has the degree of freedom of rotation around its own axis; the side of the piston rod 2 is provided with an external thread, the piston sleeve 31 is sleeved on the piston rod 2, and is provided with an internal thread matching the external thread; the coding switch 4 is fixed to the piston sleeve 31; the driver 32 is bolted to the bracket 33.

[0047] In one embodiment of the application, the actuator 32 is implemented as a hydraulic cylinder, a pneumatic cylinder, or an electric cylinder. For example, a hydraulic cylinder has a rack fixed to its output portion, and the outer surface of the piston sleeve 31 is provided with teeth that mesh with the rack. When the hydraulic cylinder is actuated, it drives the rack to move along a straight line, thereby rotating the piston sleeve 31 and, in turn, driving the piston rod 2 to reciprocate linearly.

[0048] In other embodiments, the driver 32 is a motor with a gear fixed to its output. The outer surface of the piston sleeve 31 is provided with teeth that mesh with the gear. When the motor is running, the gear drives the piston sleeve 31 to rotate, thereby causing the piston rod 2 to move linearly. The direction of movement of the piston rod 2 is controlled by changing the direction of the motor.

[0049] It should be noted that the rotational freedom of the piston rod 2 about its own axis is limited by the clearance head 1. Regarding the limitation method, optionally, a key and a limiting groove adapted to the key are provided between the side surface of the piston rod 2 and the inner wall of the clearance head 1. The extension directions of the key and the limiting groove are both consistent with the length direction of the piston rod 2. The key is embedded in the piston rod 2 or the clearance head 1, and the limiting groove is correspondingly formed in the clearance head 1 or the piston rod 2. During the movement of the piston rod 2, the key and the limiting groove always remain in engagement.

[0050] For further reference, Figure 1 The inner wall of the clearance head 1 is embedded with a sealing filler 6, which is sleeved on the piston rod 2 and contacts the side wall of the piston rod 2. This design can prevent gas from leaking between the side wall of the piston rod 2 and the inner wall of the clearance head 1.

[0051] The compressor clearance control system provided by this utility model controls the position of the compressor clearance through an algorithm, realizing intelligent and automatic adjustment of the compressor. Compared with traditional adjustment methods, the compressor clearance control system has the following significant effects:

[0052] (1) High adjustment accuracy. Through the precise calculation and stable adjustment of the controller 5, the piston rod 2 can be accurately adjusted, making the operation of the compressor more stable and reliable. Through continuous monitoring, calculation and adjustment, the controller 5 can ensure that the piston rod 2 is always kept in the optimal position to achieve optimal operation of the compressor. This process is automatic and does not require human intervention, which greatly improves the operating efficiency and stability of the compressor.

[0053] (2) The energy-saving effect is significant. By intelligently adjusting the clearance position, the compressor can operate in the best condition, reducing energy consumption and improving energy efficiency.

[0054] (3) Extend the life of the compressor. The intelligent adjustment method avoids the misoperation and excessive wear that may be caused by manual adjustment, effectively extending the service life of the compressor.

[0055] (4) It is easy to operate and can be remotely monitored and managed, thereby reducing the labor intensity of on-site operators and improving work efficiency.

[0056] The utility model further provides a compressor, comprising a clearance cylinder 7 and a compressor clearance control system, wherein the clearance head 1 is fixed to the clearance cylinder 7 by bolts.

[0057] The working process of the compressor provided in this embodiment is as follows:

[0058] Consider a natural gas transmission site with a reciprocating compressor compressing and transporting natural gas into a pipeline. Due to fluctuations in natural gas production, the compressor's intake pressure frequently fluctuates, necessitating real-time adjustment of the compressor's clearance to ensure stable operation. In this scenario, the monitoring system first sets the intake pressure to a setpoint of 0.4 MPa and a clearance adjustment range of ±5 mm based on the compressor's model and performance parameters. The compressor is then started. When the intake pressure falls below the setpoint, the controller 5 uses an algorithm to calculate the need for increased clearance and issues a command to the driver 32, causing the piston rod 2 to move outward a certain distance. Conversely, when the intake pressure exceeds the setpoint, the controller 5 controls the driver 32 to move the piston rod 2 inward.

[0059] By monitoring backend data in real time, operators can observe changes in intake pressure and clearance position and fine-tune system operating parameters based on actual conditions. For example, if large fluctuations in intake pressure are observed, the sensitivity of the clearance adjustment can be appropriately increased to enable the system to respond more quickly to pressure changes. After a period of operation and optimization, the performance of the reciprocating compressor has been significantly improved, with intake pressure stabilizing near the set value and compressor energy consumption significantly reduced.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A compressor clearance control system, characterized in that: include: A clearance head (1), a piston rod (2), a drive assembly (3), a coding switch (4) and a controller (5); the piston rod (2) is inserted into the clearance head (1); the drive assembly (3) is arranged on the clearance head (1) and is in transmission connection with the piston rod (2) to drive the piston rod (2) to move along its own axial direction; the coding switch (4) is used to measure the displacement of the piston rod (2); and the controller (5) is electrically connected to the coding switch (4) and the drive assembly (3) respectively.

2. The compressor clearance control system according to claim 1, characterized in that: The driving assembly (3) includes a piston sleeve (31) and a driver (32); The piston sleeve (31) is located outside the clearance head (1) and is threadedly connected to the piston rod (2); The output end of the driver (32) is connected to the piston sleeve (31) to drive the piston sleeve (31) to rotate around its own axis.

3. The compressor clearance control system according to claim 2, characterized in that: The side surface of the piston rod (2) is provided with an external thread; The piston sleeve (31) is sleeved on the piston rod (2) and is provided with an internal thread that matches the external thread.

4. The compressor clearance control system according to claim 3, characterized in that: The driving assembly (3) further comprises a bracket (33), and the piston sleeve (31) is rotatably matched with the bracket (33) so as to be rotatable around its own axis.

5. The compressor clearance control system according to claim 4, characterized in that: The bracket (33) is bolted to the clearance head (1).

6. The compressor clearance control system according to claim 4, characterized in that: The driver (32) is bolted to the bracket (33).

7. The compressor clearance control system according to claim 2, characterized in that: The coding switch (4) is fixed to the piston sleeve (31).

8. The compressor clearance control system according to claim 1, characterized in that: A sealing filler (6) is embedded in the inner wall of the clearance head (1), and the sealing filler (6) is sleeved on the piston rod (2) and contacts the side wall of the piston rod (2).

9. A compressor, characterized in that: The invention comprises a clearance cylinder (7) and a compressor clearance control system according to any one of claims 1 to 8, wherein the clearance head (1) is fixed to the clearance cylinder (7).

10. The compressor according to claim 9, characterized in that The clearance head (1) is connected to the clearance cylinder (7) by bolts.