Adjustable stator bearing seat structure of hydraulic dynamometer

Abstract

The utility model relates to an adjustable stator bearing seat structure of a hydraulic dynamometer, which comprises a hydraulic dynamometer operation main body, two ends of the hydraulic dynamometer operation main body are supported and installed through a stator bearing seat, a main shaft bearing seat is installed in the stator bearing seat in a matched mode, and an adjusting device assembly is installed between the stator bearing seat and the main shaft bearing seat. The main shaft bearing seat is used for supporting a central main shaft of the hydraulic dynamometer operation main body; the installation structure of the adjusting device assembly comprises a bearing box body, symmetrical installation holes are formed in the bearing box body, the adjusting device assembly is installed in the installation holes, the adjusting device assembly specifically comprises an eccentric shaft installed in the bearing box body in a matched mode, a rolling bearing is installed on the eccentric shaft, and a steel sleeve is installed on the outer ring of the rolling bearing. The inner ring and the outer ring of the two ends of the rolling bearing are the distance ring and the baffle ring respectively, and the circlip for the hole is arranged outside the baffle ring, thereby being convenient to adjust and low in cost.

Description

Technical Field

[0001] The utility model relates to the technical field of bearing seats, in particular to an adjustable stator bearing seat structure of a hydraulic dynamometer. Background Art

[0002] Hydraulic dynamometer is a device that measures power through the energy transfer of water. It is mainly used to absorb and measure the power generated by the engine. It has the advantages of high measurement accuracy, sensitive response, strong operating ability, compact size and good maintainability. It has become a consistent standard means of testing for scientific research and equipment testing, durability testing and repairability testing of aviation, industrial and marine gas turbines.

[0003] The hydraulic dynamometer mainly includes the operating body, two front and rear stator bearing seats and other auxiliary systems such as oil, water and measurement. The operating body includes the main shaft and shaft rotating parts, main shaft bearings, stator and cavity, and main shaft bearing seat. The stator bearing seat is mainly used to support the operating body of the hydraulic dynamometer, bear the operating load and adjust the unbalanced force of the main shaft bearing.

[0004] The hydraulic dynamometer stator bearing seat in the prior art directly adopts a whole large tapered roller bearing. The tapered roller bearing needs to be disassembled during installation, which makes the installation complicated. In addition, the range of eccentricity of the main shaft axis absorbed by the whole tapered roller bearing during operation is relatively small. In addition, the larger the hydraulic dynamometer, the larger the tapered roller bearing used, which increases the difficulty and cost of bearing design and manufacturing. Utility Model Content

[0005] In view of the shortcomings of the above-mentioned existing production technology, the applicant provides an adjustable stator bearing seat structure for a hydraulic dynamometer, thereby using an adjustment device assembly to adjust the radial clearance between the stator bearing seat and the main shaft bearing seat and improve the ability to absorb eccentricity during operation of the shaft system. The structure is easy to install and has low cost.

[0006] The technical solution adopted by the utility model is as follows:

[0007] A hydraulic dynamometer adjustable stator bearing seat structure, comprising a hydraulic dynamometer operating body, both ends of the hydraulic dynamometer operating body are supported and installed by stator bearing seats, a main shaft bearing seat is installed in the stator bearing seat, an adjustment device assembly is installed between the stator bearing seat and the main shaft bearing seat, and the main shaft bearing seat is used to support the central main shaft of the hydraulic dynamometer operating body;

[0008] The installation structure of the adjustment device assembly is as follows: it includes a bearing housing, a symmetrical installation hole is opened on the bearing housing, and the adjustment device assembly is installed in the installation hole, specifically including an eccentric shaft installed in the bearing housing, a rolling bearing is installed on the eccentric shaft, a steel sleeve is installed on the outer ring of the rolling bearing, the inner and outer rings at both ends of the rolling bearing are respectively a distance ring and a retaining ring, and the outer side of the retaining ring is an elastic retaining ring for the hole.

[0009] As a further improvement of the above technical solution:

[0010] There are four sets of adjustment device components, two sets at the top and two sets at the bottom.

[0011] The four sets of adjustment device components are evenly distributed around the circumference with the main shaft axis as the center.

[0012] The circle formed by the axes of the four adjustment device assemblies is concentric with the main axis.

[0013] The outer ring surface of the steel sleeve is tangent to the outer ring surface of the main shaft bearing seat.

[0014] The bearing housing adopts a split structure, divided into upper and lower halves.

[0015] The rolling bearing adopts self-aligning roller bearing.

[0016] The eccentric shaft is an integrated structure.

[0017] The eccentric shaft is composed of a flange end, a No. 1 support section, an eccentric section and a No. 2 support section in the axial direction. Four circumferential waist-shaped holes are distributed at the flange end. Bolt assemblies are installed in the circumferential waist-shaped holes. The No. 1 support section cooperates with the bearing housing. The eccentric section is installed with a rolling bearing and a distance ring at one end. The No. 2 support section is installed with a distance ring and a bearing housing at the other end.

[0018] The steel sleeve is made of bearing steel.

[0019] The beneficial effects of the utility model are as follows:

[0020] The utility model has a compact and reasonable structure and is easy to operate. Through the unique design of the adjustment device assembly, the radial clearance adjustment work between the stator bearing seat and the main shaft bearing seat can be easily completed, and the absorption capacity of the eccentricity during the operation of the shaft system can be improved. The overall manufacturing difficulty is low, the working reliability is good, and the manufacturing cost is greatly reduced.

[0021] The utility model also has the following advantages:

[0022] (1) The radial clearance between the stator bearing seat and the main shaft bearing seat is adjustable by utilizing the motion trajectory of the eccentric section axis of the eccentric shaft and the waist-shaped hole at the flange end.

[0023] (2) The axial free swing of four self-aligning roller bearings improves the eccentricity absorption capacity of the shaft system during operation, reduces the additional unbalanced force of the main shaft bearing, and ensures the smooth operation of the shaft system.

[0024] (3) The overall design has low manufacturing difficulty, easy installation and low manufacturing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1This is an application diagram of the utility model.

[0026] Figure 2 It is a structural schematic diagram of the utility model.

[0027] Figure 3 It is a cross-sectional view of the adjustment device assembly of the utility model.

[0028] Figure 4 It is a structural schematic diagram of the eccentric shaft of the utility model.

[0029] Among them: 1. Adjustment device assembly; 2. Bearing box; 3. Eccentric shaft; 4. Rolling bearing; 5. Steel sleeve; 6. Snap ring; 7. Spacer ring; 8. Elastic snap ring for hole; 9. Bolt assembly; 10. Hydraulic dynamometer operating body; 11. Stator bearing seat; 12. Main shaft bearing seat;

[0030] 301, flange end; 302, support section No. 1; 303, eccentric section; 304, support section No. 2. DETAILED DESCRIPTION

[0031] The specific implementation of the present utility model is described below in conjunction with the accompanying drawings.

[0032] like Figure 1-Figure 4 As shown, the adjustable stator bearing seat structure of the hydraulic dynamometer of this embodiment includes a hydraulic dynamometer operating body 10, both ends of the hydraulic dynamometer operating body 10 are supported and installed by stator bearing seats 11, a main shaft bearing seat 12 is installed in the stator bearing seat 11, an adjustment device assembly 1 is installed between the stator bearing seat 11 and the main shaft bearing seat 12, and the main shaft bearing seat 12 is used to support the central main shaft of the hydraulic dynamometer operating body 10;

[0033] The installation structure of the adjustment device assembly 1 is as follows: it includes a bearing housing 2, and a symmetrical installation hole is opened on the bearing housing 2. The adjustment device assembly 1 is installed in the installation hole, specifically including an eccentric shaft 3 installed in the bearing housing 2, a rolling bearing 4 is installed on the eccentric shaft 3, a steel sleeve 5 is installed on the outer ring of the rolling bearing 4, and the inner and outer rings at both ends of the rolling bearing 4 are respectively a distance ring 7 and a retaining ring 6, and the outer side of the retaining ring 6 is an elastic retaining ring 8 for the hole.

[0034] There are four sets of adjustment device components 1, two sets at the top and two sets at the bottom.

[0035] The four adjustment device assemblies 1 are evenly distributed around the circumference with the main shaft axis as the center.

[0036] The circle formed by the axes of the four adjustment device assemblies 1 is concentric with the main axis.

[0037] The outer ring surface of the steel sleeve 5 is tangent to the outer ring surface of the main shaft bearing seat 12.

[0038] The bearing housing 2 adopts a split structure and is divided into an upper and a lower half.

[0039] The rolling bearing 4 adopts a self-aligning roller bearing.

[0040] The eccentric shaft 3 is an integrated structure.

[0041] The eccentric shaft 3 is composed of a flange end 301, a No. 1 support section 302, an eccentric section 303 and a No. 2 support section 304 in the axial direction. Four circumferential waist-shaped holes are distributed at the flange end 301. Bolt assemblies 9 are installed in the circumferential waist-shaped holes. The No. 1 support section 302 cooperates with the bearing housing 2. The rolling bearing 4 and a distance ring 7 at one end are installed at the eccentric section 303. The distance ring 7 and the bearing housing 2 at the other end are installed at the No. 2 support section 304.

[0042] The steel sleeve 5 is made of bearing steel.

[0043] The specific structure and function of the adjustable stator bearing seat structure of a hydraulic dynamometer described in the utility model are as follows:

[0044] The bearing seat adopts a combined structure, which is divided into two halves, upper and lower halves, including an adjustment device assembly 1 and a bearing housing 2.

[0045] Among them, the adjustment device assembly 1 is provided with four sets, two sets on the upper and lower sides, and each set includes an eccentric shaft 3, a rolling bearing 4, a steel sleeve 5, two retaining rings 6, two distance rings 7, and two elastic retaining rings for holes 8. The rolling bearing 4 is sleeved on the eccentric shaft 3, and the steel sleeve 5 is sleeved on the outer ring of the rolling bearing 4. The inner and outer rings at both ends of the rolling bearing 4 are distance rings 7 and retaining rings 6, and the outer side of the retaining ring 6 is an elastic retaining ring 8 for the hole.

[0046] The bearing housing 2 is divided into two halves, upper and lower, and two mounting holes of the adjustment device assembly 1 are respectively provided symmetrically in the upper and lower halves for installing the adjustment device assembly 1. The two upper adjustment device assemblies 1 use an eccentric shaft 3. During installation, the radial clearance between the adjustable stator bearing seat 11 and the main shaft bearing seat 12 is achieved by rotating the eccentric shaft 3. When the shaft system is running, the axial free swing of the rolling bearing 4 automatically absorbs the eccentricity of the main shaft system during operation, thereby reducing the unbalanced force of the main shaft bearing.

[0047] The four adjustment device assemblies 1 are evenly distributed around the circumference with the main shaft axis as the center, and are arranged symmetrically up and down.

[0048] The circle formed by the axes of the four adjusting device assemblies 1 is concentric with the main shaft, and the outer ring surface of the steel sleeve 5 of the adjusting device assembly 1 is tangent to the outer ring surface of the main shaft bearing seat 12.

[0049] The rolling bearing 4 is a self-aligning roller bearing;

[0050] The eccentric shaft 3 is composed of a flange end 301 , a first support section 302 , an eccentric section 303 , and a second support section 304 in sequence along the axial direction.

[0051] The flange end 301 of the eccentric shaft 3 is provided with four circumferential waist-shaped holes evenly distributed on the circumference.

[0052] The steel sleeve 5 is made of bearing steel and is heat treated to ensure a high hardness and a certain wear resistance. A retaining ring groove is provided on the steel sleeve 5 for mounting an elastic retaining ring 8 for the hole.

[0053] The steel sleeve 5 is sleeved on the outer ring of the self-aligning roller bearing, and the retaining ring 6 and the self-aligning roller bearing are axially limited and fixed by a hole elastic retaining ring 8.

[0054] The eccentric shaft 3 is sequentially inserted into the bearing housing 2 , the distance ring 7 , the self-aligning roller bearing, the distance ring 7 , and the bearing housing 2 , and the self-aligning roller bearing is located at the eccentric section 303 .

[0055] In actual working process:

[0056] By rotating the flange end 301 of the eccentric shaft 3, the radial clearance between the stator bearing seat 11 and the main shaft bearing seat 12 can be adjusted by the eccentric section 303. After adjustment, the axial waist hole of the flange end 301 of the eccentric shaft 3 is fixed with the bolt assembly 9, so that the adjustment device assembly 1 is fixed; when the shaft system is running, the axial free swing of the automatic spherical roller bearing automatically absorbs the eccentricity of the shaft system during operation.

[0057] The above description is an explanation of the utility model, not a limitation of the utility model. The scope of the utility model is defined by the claims. Any form of modification can be made within the protection scope of the utility model.

Claims

1. A hydraulic dynamometer adjustable stator bearing seat structure, comprising a hydraulic dynamometer operating body (10), characterized in that: The two ends of the hydraulic dynamometer operating body (10) are supported and installed by a stator bearing seat (11), a main shaft bearing seat (12) is installed in the stator bearing seat (11), an adjustment device assembly (1) is installed between the stator bearing seat (11) and the main shaft bearing seat (12), and the main shaft bearing seat (12) is used to support the central main shaft of the hydraulic dynamometer operating body (10); The installation structure of the adjustment device assembly (1) comprises a bearing housing (2), the bearing housing (2) is provided with symmetrical installation holes, the adjustment device assembly (1) is installed in the installation holes, and specifically comprises an eccentric shaft (3) installed in the bearing housing (2), a rolling bearing (4) is installed on the eccentric shaft (3), a steel sleeve (5) is installed on the outer ring of the rolling bearing (4), the inner and outer rings at both ends of the rolling bearing (4) are respectively a distance ring (7) and a retaining ring (6), and the outer side of the retaining ring (6) is an elastic retaining ring (8) for the hole.

2. The adjustable stator bearing seat structure of a hydraulic dynamometer according to claim 1, characterized in that: A total of four sets of adjustment device components (1) are provided, two sets at the top and two sets at the bottom.

3. The adjustable stator bearing seat structure of a hydraulic dynamometer according to claim 2, characterized in that: Four sets of adjustment device components (1) are evenly distributed around a circle with the main shaft axis as the center.

4. The adjustable stator bearing seat structure of a hydraulic dynamometer according to claim 2, characterized in that: The circle formed by the axis centers of the four adjustment device assemblies (1) is concentric with the main axis.

5. The adjustable stator bearing seat structure of a hydraulic dynamometer according to claim 1, characterized in that: The outer ring surface of the steel sleeve (5) is tangent to the outer ring surface of the main shaft bearing seat (12).

6. The adjustable stator bearing seat structure of a hydraulic dynamometer according to claim 1, characterized in that: The bearing housing (2) adopts a split structure and is divided into an upper and a lower half.

7. The adjustable stator bearing seat structure of a hydraulic dynamometer according to claim 1, characterized in that: The rolling bearing (4) adopts a self-aligning roller bearing.

8. The adjustable stator bearing seat structure of a hydraulic dynamometer according to claim 1, characterized in that: The eccentric shaft (3) is an integrated structure.

9. The adjustable stator bearing seat structure of a hydraulic dynamometer according to claim 1, characterized in that: The eccentric shaft (3) is composed of a flange end (301), a first support section (302), an eccentric section (303) and a second support section (304) in the axial direction. Four circumferential waist-shaped holes are distributed at the flange end (301), and bolt assemblies (9) are installed in the circumferential waist-shaped holes. The first support section (302) cooperates with the bearing housing (2), the eccentric section (303) is installed with a rolling bearing (4) and a distance ring (7) at one end, and the second support section (304) is installed with a distance ring (7) and a bearing housing (2) at the other end.

10. The adjustable stator bearing seat structure of a hydraulic dynamometer according to claim 1, characterized in that: The steel sleeve (5) is made of bearing steel.

Images