阅读说明：本技术 一种压缩机缓冲罐共振控制装置 (Resonance control device for buffer tank of compressor ) 是由 李刚 徐光明 刘锋 青小渠 杜丽民 黄志强 陈清涛 李果 于 2021-01-19 设计创作，主要内容包括：本发明涉及一种压缩机缓冲罐共振控制装置,它包括四组缓冲罐连接刚度控制机构,每一组缓冲罐连接刚度控制机构由左支座、旋转接头、右支座、拉杆、调节螺母、拉板、U型套构成。左支座和右支座通过螺栓安装在压缩机底座上。通过改变由左支座和右支座在压缩机底座上的安装位置,可以调节拉杆与水平方向的夹角,从而改变缓冲罐在水平方向和竖直方向的受力,进一步改变缓冲罐与压缩机底座连接刚度,从而改变缓冲罐的固有频率。本发明解决了缓冲罐固有频率与激励频率接近或相等导致缓冲罐共振的问题,降低了出口接管与缓冲罐体连接处开裂的风险。(The invention relates to a resonance control device of a buffer tank of a compressor, which comprises four groups of buffer tank connection rigidity control mechanisms, wherein each group of buffer tank connection rigidity control mechanism consists of a left support, a rotary joint, a right support, a pull rod, an adjusting nut, a pull plate and a U-shaped sleeve. The left support and the right support are installed on the compressor base through bolts. Through changing the mounted position by left branch seat and right branch seat on the compressor base, can adjust the contained angle of pull rod and horizontal direction to change the atress of buffer tank in horizontal direction and vertical direction, further change buffer tank and compressor base and be connected rigidity, thereby change the natural frequency of buffer tank. The invention solves the problem of buffer tank resonance caused by the fact that the natural frequency of the buffer tank is close to or equal to the excitation frequency, and reduces the risk of cracking at the joint of the outlet connecting pipe and the buffer tank body.)

1. A resonance control device for a buffer tank of a compressor comprises four groups of buffer tank connection rigidity control mechanisms, wherein each group of buffer tank connection rigidity control mechanism is composed of a left support (6), a rotary joint (7), a right support (8), a pull rod (9), an adjusting nut (10), a pull plate (11) and a U-shaped sleeve (12); the left support (6) and the right support (8) are installed on the compressor base through bolts; the rotary joint (7) is connected between the left support (6) and the right support (8) through a shaft; the rotary joint (7) is provided with a threaded hole for connecting with the pull rod (9); the whole body of the pull rod (9) is processed with threads, one end of the pull rod is connected with the rotary joint (7), and the other end of the pull rod is connected with the pull plate (11) through two adjusting nuts (10); one end of a U-shaped sleeve (12) is sleeved on the buffer tank body, and the other end of the U-shaped sleeve is connected to the pulling plate (11) through a bolt.

2. A compressor surge tank resonance control apparatus as set forth in claim 1, wherein: the four groups of buffer tanks are connected with the rigidity control mechanism and are symmetrically arranged along the axis of the tank body; through changing the mounting position of left support (6) and right support (8) on the compressor base, can adjust the contained angle of pull rod (9) and horizontal direction to change the atress of buffer tank in horizontal direction and vertical direction, change buffer tank compressor buffer tank structural rigidity.

Technical Field

The invention belongs to the field of petroleum and natural gas gathering and transportation equipment, and particularly relates to a resonance control device for a buffer tank of a compressor.

Background

The compressor is widely applied to the aspects of natural gas pressurization gathering and transportation, gas production, gas injection, light hydrocarbon recovery, desulfurization pressurization and the like. The buffer tank is the most common structure for reducing the air flow pulsation, and plays an important role in improving the vibration of the air path system of the compressor. When the excitation frequency is close to or equal to the natural frequency of the buffer tank, horizontal torsional vibration of the buffer tank around the outlet connection pipe and vertical shimmy of the inlet side and the tail side of the buffer tank often occur. Under the long-term vibration effect, the junction of the outlet connecting pipe and the buffer tank body is easy to crack and lose efficacy, so that the compressor is shut down, and even natural gas leakage happens to threaten the safety of field workers and equipment.

At present, aiming at the resonance failure of the buffer tank, a passive protection mode of adding a reinforcing ring at the joint of an outlet connecting pipe and the buffer tank body is mainly adopted, and no active control device specially aiming at the resonance of the buffer tank exists.

Disclosure of Invention

Aiming at the problem of buffer tank resonance, the invention discloses a compressor buffer tank resonance control device, which changes the natural frequency of a buffer tank by changing the connection rigidity between the buffer tank and a compressor base, avoids the resonance when the natural frequency of the buffer tank is close to or equal to the excitation frequency, and reduces the risk of cracking at the joint of an outlet connecting pipe and the buffer tank.

The technical scheme adopted by the invention is as follows:

the invention comprises four groups of buffer tank connection rigidity control mechanisms, wherein each group of buffer tank connection rigidity control mechanism consists of a left support, a rotary joint, a right support, a pull rod, an adjusting nut, a pull plate and a U-shaped sleeve. The left support and the right support are installed on the compressor base through bolts. The rotary joint is connected between the left support and the right support through a shaft. The rotary joint is provided with a threaded hole for connecting with the pull rod. The pull rod is provided with a thread on the whole body, one end of the pull rod is connected with the rotary joint, and the other end of the pull rod is connected with the pull plate through two adjusting nuts. One end of the U-shaped sleeve is sleeved on the buffer tank body, and the other end of the U-shaped sleeve is connected to the pulling plate through a bolt.

Four groups of buffer tanks are connected with the rigidity control mechanism and are symmetrically arranged along the axis of the tank body. The tension force applied to the buffer tank is changed by changing the positions of the two adjusting nuts on the pull rod. Through changing the mounted position of left support and right support on the compressor base, can adjust the contained angle of pull rod and horizontal direction to change the atress of buffer tank in horizontal direction and vertical direction.

The invention is based on changing the natural frequency of the surge tank by changing the stiffness of the connection. When the working rotating speed of the compressor and the natural gas treatment capacity are determined, the excitation frequency of the buffer tank is basically unchanged, and when the excitation frequency is close to or equal to the natural frequency of the buffer tank, the buffer tank can resonate, so that the horizontal torsional vibration of the buffer tank around an outlet connecting pipe and the vertical shimmy of the inlet side and the tail side of the buffer tank are caused. Therefore, the connection rigidity of the buffer tank and the compressor base is changed by changing the horizontal tension and the vertical tension of the buffer tank and the compressor base, the natural frequency of the buffer tank is further changed, the natural frequency of the buffer tank is prevented from being close to or equal to the excitation frequency, and the resonance of the buffer tank is avoided.

The invention has the following advantages:

1. the U-shaped sleeve is in contact connection with the tank body, so that the buffer tank body cannot be damaged.

2. By changing the position of the adjusting nut on the pull rod, the total tension on the buffer tank can be changed as required.

3. Through changing the mounted position by left branch seat and right branch seat on the compressor base, can adjust the contained angle of pull rod and horizontal direction to change the atress of buffer tank in horizontal direction and vertical direction, conveniently adjust the connection rigidity of buffer tank, change buffer tank natural frequency.

Drawings

FIG. 1 is a schematic axial view of a resonance control device for a surge tank of a compressor according to the present invention.

Fig. 2 is a top view of a resonance control device for a buffer tank of a compressor according to the present invention.

In the figure: 1. the device comprises a buffer tank body, 2 inlet connecting pipes, 3 inlet connecting pipe flanges, 4 outlet connecting pipe flanges, 5 outlet connecting pipes, 6 left supports, 7 rotating joints, 8 right supports, 9 pull rods, 10 adjusting nuts, 11 pull plates and 12U-shaped sleeves.

Detailed Description

The invention is further described below with reference to the accompanying drawings.

As shown in fig. 1 and 2, the resonance control device for the buffer tank of the compressor comprises four groups of buffer tank connection rigidity control mechanisms, wherein each group of buffer tank connection rigidity control mechanism comprises a left support 6, a rotary joint 7, a right support 8, a pull rod 9, an adjusting nut 10, a pull plate 11 and a U-shaped sleeve 12. The left support 6 and the right support 8 are mounted on the compressor base through bolts. The rotary joint 7 is installed between the left support 6 and the right support 8 through a shaft connection. The rotary joint 7 is provided with a threaded hole for connecting with a pull rod 9. The pull rod 9 is threaded on the whole body, one end of the pull rod is connected with the rotary joint 7, and the other end of the pull rod is connected with the pull plate 11 through two adjusting nuts 10. One end of the U-shaped sleeve 12 is sleeved on the buffer tank body, and the other end of the U-shaped sleeve is connected to the pulling plate 11 through a bolt.

Four groups of buffer tanks are connected with the rigidity control mechanism and are symmetrically arranged along the axis of the tank body. The tension to which the buffer vessel is subjected is changed by changing the position of the two adjusting nuts 10 on the tie rod 9. Through changing the mounted position of left support 6 and right support 8 on the compressor base, can adjust the contained angle of pull rod 9 and horizontal direction to change the atress of buffer tank in horizontal direction and vertical direction.

The invention is based on changing the natural frequency of the surge tank by changing the stiffness of the connection. When the working rotating speed of the compressor and the natural gas treatment capacity are determined, the excitation frequency of the buffer tank is basically unchanged, and when the excitation frequency is close to or equal to the natural frequency of the buffer tank, the buffer tank can resonate, so that the horizontal torsional vibration of the buffer tank around an outlet connecting pipe and the vertical shimmy of the inlet side and the tail side of the buffer tank are caused. Therefore, the connection rigidity of the buffer tank and the compressor base is changed by changing the horizontal tension and the vertical tension of the buffer tank and the compressor base, the natural frequency of the buffer tank is further changed, the natural frequency of the buffer tank is prevented from being close to or equal to the excitation frequency, and the resonance of the buffer tank is avoided.